WO2017060649A1

WO2017060649A1 - Cut-resistant yarn, protective clothing made with such a yarn and related manufacturing methods

Info

Publication number: WO2017060649A1
Application number: PCT/FR2016/052597
Authority: WO
Inventors: Christophe Jean BRUYERE
Original assignee: Bruyere Holding
Priority date: 2015-10-09
Filing date: 2016-10-07
Publication date: 2017-04-13
Also published as: ES2949542T3; EP3359717B1; EP3359717A1; FR3042205A1; FR3042204B1; FR3042205B1; FR3042204A1

Abstract

The invention relates to a cut-resistant yarn (1) comprising: - a core (2) consisting of at least one fibre made of a material resistant to cutting by sharp objects, - at least one covering yarn (3) which at least partially covers the core (2), characterised in that the covering yarn (3) is provided, over its entire surface, with a water-repellent coating layer in order to provide water-repellency properties to said cut-resistant yarn (1).

Description

ANTI-CUTTING WIRE, PROTECTIVE GARMENT MADE THROUGH SUCH A THREAD, AND METHODS OF MANUFACTURING THE SAME

TECHNICAL AREA

The present invention relates to the field of textile yarns for technical use to impart to the products in which they are incorporated a mechanical characteristic of cut resistance by sharp objects, the field of protective clothing against the risk of cut by sharps for example, cut-resistant protective gloves, as well as the field of manufacturing processes for such threads and protective clothing against the risk of cuts.

The present invention relates more particularly to an anti-cut wire, comprising:

a core at least made of a fiber of a material resistant to cutting,

at least one cover wire which at least partially covers the core.

The present invention also relates to a method of manufacturing such an anti-cut wire.

The present invention furthermore relates to an anti-cut protection garment, for example a glove, made with at least one anti-cut-off yarn.

The present invention finally relates to a method of manufacturing an anti-cut protection garment, for example a glove. PRIOR ART

In the field of textile threads resistant to cut by sharp objects, a large number of son and technical fibers are known or assembling son and technical fibers having intrinsic properties of mechanical strength particularly high, allowing them, in particular, to withstand a major slicing effort. Such yarns and technical fibers are commonly referred to by the term "cut-off", well known in the art. The use of glass fibers or stainless steel is, for example, well known in the intended field. Also known are son and synthetic organic fibers with very high performance, such as para-aramid fibers or high tenacity polyethylene. These are, for example, used for the manufacture of technical anti-cut son in the form of son simple souls, that is to say, whose soul is composed only of such synthetic fiber with very high performance, or in the form of son with composite cores, combining these very high performance synthetic fibers with wire, fiberglass, or extensible son.

It is well known to use such anti-cut son, for example by knitting, for the manufacture of protective clothing against the risk of cutting by sharp objects, such as gloves, cuffs or aprons. In this context, the mechanical performance of the materials constituting the protective clothing and hence the protective clothing themselves, in terms of cut resistance, are conventionally evaluated according to the reference system of the ISO 13 997 standard, which defines the testing of these materials and assemblies for protective clothing. This test is a method of calculating the normal downward force required for a blade displaced along the sample over a given distance to pass through a specimen made of such materials or assemblies of materials. The performance of the materials and assemblies is then classified according to the values obtained with this test. Other standards also apply according to the type of protective clothing. For example, for a garment such as a glove, the European legislation, through the EN 388 standard, requires manufacturers to indicate the level of resistance of their protective gloves against the so-called mechanical risks, ie the risks related to abrasion, cutting, tearing and puncturing. The cut resistance is, in this context, determined by measuring the number of cycles necessary to cut the sample at a constant speed and classified on a scale from 1 to 5. Such cut-resistant protective clothing is classically used in industry to deal with the risk of serious injury caused by sharp objects, such as knives, sheet metal parts, burrs, glass, blade tools, etc.

In the agri-food sector, especially for meat and fish cutting applications, cut-resistant protective clothing R2016 / 052,597

3, which also have imperviousness to liquids such as water, oils and body fluids (blood, etc.) are particularly sought after.

In order to give the cut-resistant protective clothing a liquid-impermeable property, a well-known and widespread solution consists in coating the garment, in part or in whole, with an elastomeric material, for example latex, nitrile foam, or polyurethane, so as to form a waterproof layer on the surface of the garment. In addition to contributing to the stiffening of the protective clothing, these impermeable coating materials have low resistance to abrasion and washing and drying cycles, as well as very poor breathability, i.e. say that they do not allow, or very little, the evacuation of perspiration in the form of water vapor. Another well-known alternative solution consists in impregnating the knitted garment in full bath with the aid of a coating paste composed, for example, of particular chemical specialties with hydrophobic and / or lipophilic properties, so as to form the surface of the garment a water-repellent coating.

In order to ensure the fixing of this coating paste on the knitted yarns of the garment, and to ensure that the coating layer thus formed is withstand the wear and especially the washing / drying cycles over time, it is however imperative to implement a specific treatment, for example a high temperature heat treatment, typically at 180 ° C. Otherwise, the coating layer degrades very quickly, sometimes as soon as the first washing of the garment. However, certain components of the technical anti-cut threads conferring on the garment its mechanical properties of resistance to cutting by sharp objects, in particular the high tenacity polyethylene fibers and polypropylene which compose them, are not able to withstand such high temperatures. treatment. Therefore, such a rise in temperature during the heat treatment of fixing would substantially degrade the mechanical properties of these anti-cut son.

The problem is essentially the same in the case of a UV radiation fixation treatment, because of the sensitivity of certain components of ultraviolet cut-resistant technical wires, also leading to an irreversible degradation of their mechanical properties. SUMMARY OF THE INVENTION

The invention therefore aims to remedy the various disadvantages mentioned above, and to propose a new anti-cut wire having both excellent properties of resistance to cutting by sharp objects and resistance to wetting.

Another object of the invention is to propose a new process for manufacturing a particularly simple and effective wicking resistant wire which does not degrade the mechanical performance of the anti-cut components of the wire.

Another object of the invention is to propose a novel method of manufacturing a cut-resistant yarn whose water-repellent treatment is robust, durable and particularly resistant to a large number of washing / drying cycles.

Another object of the invention is to provide a novel method of manufacturing a mop-resistant cut-resistant yarn and provided with a very high resistance to abrasion.

Another object of the invention is to propose a new protective clothing against the risk of cut by sharp objects offering both a very high resistance to cutting and excellent resistance to wetting, this wetting resistance being particularly durable in the weather.

Another object of the invention is to propose a new protective clothing against the risk of cut by sharps having a very good breathability.

Another object of the invention is to provide a new protective clothing against the risk of cut by sharp objects offering in addition a very good dexterity.

Another object of the invention is to provide a new protective clothing against the risk of cut by sharps also offering a very high resistance to abrasion. Another object of the invention is to propose a new manufacturing method for the simple and fast manufacture of a protective clothing against the risk of cutting by sharps having the technical advantages listed above. The objects assigned to the invention are achieved by means of an anti-cut wire, comprising:

a core at least consisting of a fiber of a material resistant to cutting by sharp objects,

at least one cover wire which at least partially covers the core, characterized in that the cover wire is provided over its entire surface with a coating layer impervious to liquids, so as to impart to said anti-cutoff wire a property of resistance to wetting.

The objects assigned to the invention are also achieved by means of a method of manufacturing an anti-cut wire, comprising:

a step of manufacturing or supplying at least one core consisting of a fiber of a material resistant to cutting by sharp objects,

a step of manufacturing or supplying at least one core cover wire, characterized in that said method comprises the following successive steps:

a coating step, during which the covering yarn is coated over its entire surface with a coating preparation to obtain a coated cover yarn, said coating preparation being designed to form a water-repellent coating layer; on the entire surface of said coated cover wire,

- An assembly step, during which the cover wire is assembled with said core so as to cover at least partially said core with said cover wire. The objects assigned to the invention are also achieved by means of an anti-cut protection garment, for example a glove, characterized in that it comprises a textile piece made from at least a first conforming yarn to the description of the anti-cut wire which is made above. The objects assigned to the invention are finally achieved by means of a method of manufacturing an anti-cut protection garment, for example a glove, characterized in that it comprises a step of manufacturing a workpiece textile by means of at least one anti-cut wire according to the invention. SUMMARY DESCRIPTION OF THE DRAWINGS

Other objects and advantages of the invention will appear in more detail on reading the description which follows, as well as with the aid of the accompanying drawings provided for purely explanatory and non-limiting purposes, in which:

FIG. 1 illustrates a preferred embodiment of a first, single-core variant of FIG. anti-cut of the invention;

FIG. 2 illustrates a preferred embodiment of a second variant, with a composite core, of the anti-cut wire of the invention;

FIG. 3 illustrates a preferred embodiment of a third variant, with composite core and with double cover wire, of the anti-cut wire of the invention; FIG. 4 illustrates a preferred embodiment of a fourth variant, with a composite core and with a double cover wire, of the anti-cutoff fiber of the invention;

FIG. 5 illustrates a preferred embodiment of a first knit yarn intended to be knitted, in particular with the anti-cut yarn of FIGS. 3 or 4;

FIG. 6 illustrates a first example of a preferred embodiment of a glove-type anti-cut garment, obtained by knitting in triple jersey jersey of anti-cut yarns according to the variants of FIGS. 1 and 2;

FIG. 7 illustrates a second example of a preferred embodiment of a glove-type cut-resistant garment obtained by knitting in a vanized jersey of a cut-resistant yarn according to the variant of FIG. 3 with the first knitting yarn. of Figure 5; FIG. 8 illustrates a third example of a preferred embodiment of a glove-type anti-cut garment obtained by knitting a cut-off yarn in jersey according to the variant of FIG. 4.

BEST MODE FOR CARRYING OUT THE INVENTION The invention relates primarily to an anti-cut-off wire 1, examples of which are embodied according to the invention are illustrated in FIGS. 1 to 3. By "anti-cut-off wire" is meant, as introduced above, a single or composite technical textile yarn, that is to say composed of several yarns or fibers of different materials, having an intrinsic property of particularly high mechanical strength, allowing it to withstand a stress slicing, as evaluated, for example, by the method proposed by the ISO 13 997 standard of 1999.

Preferably, the anti-cut 1 wire is suitable for use in the manufacture of textile pieces, for example by knitting or weaving, using industrial or semi-industrial means (knitting or weaving machines). ) mechanical or electronic.

According to an important characteristic of the invention, the anti-cut wire 1 comprises:

a core 2 at least consisting of a fiber of a material resistant to cutting by sharp objects,

at least one cover wire 3 which at least partially covers the core 2, said covering wire 3 being provided over its entire surface with a water-repellent coating layer, so as to impart to said anti-cut-off wire 1 a property of resistance to wetting.

Within the meaning of the invention, the core 2 is intended to contribute significantly, if not totally, to the anti-cut character of the anti-cut wire. The core 2 of the anti-cut wire 1 may be either simple, that is to say that it consists only of a single fiber of a material resistant to cutting by sharp objects, or composite, that is to say made of fibers, at least one of which is a fiber of a material resistant to cutting by sharp objects, the other fibers which, conversely, can not have any particular characteristic in terms of cut resistance.

Said material resistant to cutting by sharp objects, is preferably a material having intrinsic physicochemical characteristics such as to give a fiber made in this material an anti-cut character. Preferably, such a material makes it possible to obtain a fiber having a tenacity (for example measured using a tensile test) greater than or equal to 1 cN / dTex, preferably greater than or equal to 2 cN / dTex, more preferably greater than or equal to 3 cN / dTex. On the other hand, the cover wire 3 is preferably not intended to contribute, as such, to the anti-cut nature of the anti-cut-off wire 1. It therefore preferably does not have any particular characteristic in terms of resistance. at the break. However, it is perfectly conceivable, as will be described later, that said cover wire 3 has on the contrary a particular resistance to cutting and / or abrasion. This cover wire 3 is provided over its entire surface, with the possible exception of the cross-sectional area of its ends, with a water-repellent coating layer. The latter can be naturally present on the surface of the fi! 3, but it is however preferentially provided by the implementation of a particular coating operation. The term "coating layer" means a coating applied by coating on a surface, without prejudging the nature, thickness or rheological characteristics of the material or substance forming the layer in question. Therefore, the term "coating layer" may in particular denote either a thick layer of a pasty material or a very thin layer of a liquid material (type of chemical or coating primer). Assembled on the core 2 so as to cover it at least partially, and preferably completely, this coated cover wire 3 thus makes it possible to give the anti-cut-off yarn 1 thus formed a property of resistance to wetting by the liquids, property whose soul 2 itself was substantially devoid or, where appropriate, substantially superior to that of which the soul 2 was itself endowed. The anti-cut wire 1 of the invention can advantageously be declined according to a multitude of embodiments and, for example, according to at least the three preferred variants F1, F2, F3 described below by way of illustration and not limitation, and illustrated in FIGS. 1 to 3.

According to a first variant F1, illustrated in Figure 1, the core 2 of the anti-cut wire 1 is composed of at least one high tenacity polyethylene fiber 4, for example multi-filament. Preferably, said high tenacity polyethylene fiber 4 is continuous. Indeed, continuous fibers generally have a better modulus of elasticity, while also avoiding the dispersion in the environment fibrils or staple fibers when the anti-cut wire 1 in which they are integrated gradually wears out. Such dispersion is in fact particularly proscribed in certain fields of application, such as for example in the food industry where any contamination by foreign bodies (fibrils or other) must be absolutely avoided. By "high-tenacity polyethylene" is generally meant a family material polyethylenes very high molecular weight (UHMPE), also called high modulus polyethylenes (PEHM), ultra high modulus polyethylene (PMUE) or high performance polyethylene (HPPE). Such high tenacity polyethylene fibers 4 are, for example, known under the trademark "SPECTRA®" marketed by the company ALLIED SIGNAL / HONEYWELL or "DYNEEMA®" marketed by the company DSM.

According to a second variant F2, illustrated in FIG. 2, the core 2 of the anti-cutoff wire 1 is composed of a stainless steel fiber 5 and a glass fiber 6 coated with a polypropylene fiber 7. preferably so that said polypropylene fiber 7 partially overlaps, and preferably completely, said stainless steel fiber 5 and fiberglass 6. According to this second variant F2, the core 2 is composite.

According to a third variant F3, illustrated in FIG. 3 and advantageously corresponding to a form of combination of the two aforementioned variants F1, F2, the core 2 of the anti-cutoff wire 1 is composed of at least one high tenacity polyethylene fiber 4 mounted in parallel with an assembly of a stainless steel fiber 5 and a glass fiber 6, said stainless steel fiber 5 and fiberglass 6 being coated with a polypropylene fiber 7, preferably of a said polypropylene fiber 7 partially and even more completely covers said stainless steel and fiberglass fibers 6. Alternatively, without departing from the scope of the invention, the anti-cut wire 1 of the invention can also be declined according to a fourth preferred variant F4, as illustrated in Figure 4. According to this fourth variant F4 preferred, the core 2 of the anti-cut wire 1 is composed of a subassembly of at least two stainless steel fibers 5 and a glass fiber 6 connected in parallel and coated with a polypropylene fiber 7, so that said polypropylene fiber 7 preferably overlaps, and even more preferably completely, said stainless steel fiber 5 and fiberglass fiber 6. This subassembly is itself coated with a high polyethylene fiber toughness 4 for forming said core 2, preferably such that said high tenacity polyethylene fiber 4 partly overlaps, and even more preferably completely, said subassembly. According to this fourth variant F4, the core 2 is composite.

The polypropylene fiber 7 advantageously makes it possible to protect the glass fiber 6, and to a lesser extent the stainless steel fiber 5, by giving them better resistance to fracture and to contain any broken fibrils or fragments. As mentioned above, said polypropylene fiber 7 more completely covers said stainless steel fiber 5 and glass fiber 6. Such a configuration makes it possible, particularly advantageously, to form, after heating of said polypropylene fiber 7, a protective sheath of said stainless steel fiber 5 and fiberglass 6. In fact, the heating and melting of the polypropylene fiber 7 makes it possible to create around said stainless steel fiber 5 and fiber of glass 6 a sheath, advantageously uniform and continuous, of polypropylene. This gives a much better breaking strength of said stainless steel fiber 5 and fiberglass 6 and excellent retention of any fibrils or broken fragments, alternatively, it is obviously quite possible to keep in the said state polypropylene fiber 7 which coats and covers said stainless steel fiber 5 and fiberglass fiber 6, i.e., not to heat and melt it.

The anti-cut-off wire 1 according to the first and second variants F1, F2 preferably comprises a single cover wire 3 which completely covers the core 2, whereas the anti-cut-off wire 1 according to the third vanante F3 comprises it preferably has two cover wires 3, assembled on the core 2 so as to form respectively a first 8 and a second 9 superimposed coatings. As illustrated in FIG. 3, the high tenacity polyethylene fiber 4, the glass fiber 6, the stainless steel fiber 5 and the polypropylene fiber 7, which make up the core 2 of the anti-cut wire 1 according to this third variant F3, are therefore covered, preferably completely, by winding a first cover wire 3, itself covered, preferably completely, by winding a second cover wire 3. Still as illustrated in Figure 3, and in order to improve the mechanical properties of the anti-cut wire 1, said first cover wire 3 is advantageously mounted relative to the core 2 in a reverse twist to that of the polypropylene fiber 7 on said stainless steel fiber 5 and fiberglass 6, while said second cover wire 3 is itself mounted relative to said first cover wire 3 in a reverse twist to that of the latter. Alternatively, the core 2 of the anti-cutoff wire 1, and in particular the core 2 of the fi! anti-cut 1 according to the fourth variant F4 (Figure 4), can be covered (preferably completely) by winding a first and a second cover son 3 connected in parallel so as to ensure excellent recovery of said soul 2. It is alternatively perfectly conceivable that the anti-cut wire 1 has more than two cover wires 3 as described above. In any event, and regardless of the variant F1, F2, F3 envisaged of the anti-cut wire 1, said cover wire 3 is, preferably, a polyester thread 10A, and even more preferably a poly yarn (ethylene terephthalate) (PET). Said polyester thread 10A is, moreover, advantageously continuous.

Relatively inexpensive, easy to manufacture, polyester is a hydrophobic material and relatively resistant to abrasion. In the family of polyesters, poly (ethylene terephthalate) (PET) has the additional advantage of a relatively high melting temperature, of the order of 245 ° C, compared with the melting temperatures of high polyethylene. tenacity (about 130 ° C.) and polypropylene (PP) (about 160 ° C.), it is therefore possible to coat a polyethylene terephthalate (PET) cover wire 3 over its entire surface with a preparation coating, for example hydrophobic and lipophobic, so as to form on the latter a water-repellent coating layer, then to subject said cover yarn 3 thus coated to a high temperature treatment, typically close to 180 ° C, of a nature to allow the permanent, or at least durable, fixing of said coating layer on the surface of said cover wire 3, for example by the polymerization of the coating preparation and the creation of strong physico-chemical bonds between said coating layer; coating and i It is of course conceivable, within the scope of the invention, for the polyester thread 10A to be composed of a material of the family of polyesters other than poly (ethylene terephthalate) ( PET), for example polybutylene terephthalate (PBT), a recycled polyester or a high-tenacity polyester, provided that this polyester material has a melting temperature sufficiently higher than the temperature of implementation of the fixing treatment. of the coating layer. The assembly of such a cover wire 3 provided with a water-repellent coating layer on a core 2 at least made of a fiber of a material resistant to cutting by sharp objects, such as for example the fiber The above-mentioned high tenacity polyethylene 4 thus makes it possible to confer on the anti-cut edge 1 thus formed a durable and in particular resistant to a large number of washing and drying cycles.

As introduced above, the cover wire 3 is preferably not intended to contribute, as such, to the anti-cut character of the anti-cut 1 wire. However, it is conceivable, without departing from the scope of the invention. , that this cover wire 3 contributes, on the contrary, to the anti-cut nature of the anti-cut wire 1. The cover wire 3 may, in addition, advantageously have an abrasion resistance property so as to allow the obtaining a cut-resistant yarn 1 both resistant to wetting and provided with excellent resistance to abrasion and wear. In such a case, the fi! cover 3 may then be especially composed of fibers of a material resistant to cutting by sharp objects and / or a material resistant to abrasion and wear. In any event, the material or materials constituting such a cover wire 3 will advantageously have a physico-chemical resistance characteristic capable of enabling them to withstand a fixing treatment, whether thermal or ultraviolet irradiation, a coating preparation, for example hydrophobic and lipophobic, said covering wire 3 will be coated, and without altering their intrinsic mechanical properties of cut resistance and / or resistance to abrasion and to wear.

Regardless of the variant F1, F2, F3, F4 retained for the production of the anti-cut-off wire 1, said cover wire 3 of the anti-cut-off wire 1 (preferably continuous) may thus be preferably a wire of known material for its abrasion resistance property, such as for example a wire selected from the group comprising a wire of polyamide (PA) 10B (such as, for example, a polyamide thread 6, a high tenacity polyamide thread, a polyamide thread 6.6, a high tenacity polyamide thread 6.6, a polyamide thread 11, a high polyamide thread 11 tenacity, recycled polyamide yarn, etc.), polypropylene yarn (PP) and polyvinyl chloride yarn (PVC). The invention also relates as such to a method of manufacturing a cut-off wire 1, and advantageously to an anti-cut-off wire 1 according to the description which is given above, this method comprising:

a step of manufacturing or supplying a core 2 at least consisting of a fiber of a material resistant to cutting by sharp objects; a step of manufacturing or supplying at least one cover wire; intended to at least partially cover the core 2.

According to one characteristic of the invention, said method comprises the following successive steps:

a coating step, during which coating wire 3 is coated over its entire surface with a coating preparation to obtain a coating wire 3 coated, said coating preparation being designed to form a coating layer; water-repellent coating on the entire surface of said coating wire 3 coated,

- An assembly step, during which the coating wire 3 is coated with said core 2 so as to cover at least partially said core 2 with said cover wire 3.

In order to form a coating layer having such a water-repellent property on the surface of the cover wire 3, said coating preparation is advantageously a preparation, in liquid or pasty form, containing a certain number of chemical specialties including, for example, hydrophobic and lipophobic agents. Said coating preparation may, during said coating step, be applied to the cover wire 3 by calendering, blade, squeegee, multi-point printing, immersion in full bath, foam or by spraying, the application being made in any case preferably in a homogeneous manner so as to form a coating layer of smooth appearance and substantially constant thickness over the entire length of the cover wire 3. Moreover, if it remains conceivable that said step d coating is carried out during said step of manufacturing or supplying at least one cover wire 3, so that at the end of this step one obtains a fi! 3 coated coating, this coating step in any case precedes said assembly step. Preferably, said manufacturing method further comprises a treatment step, during which the fi lm is subjected to. cover 3 coated with a fixing treatment so as to fix said water-repellent coating layer on said cover wire 3. This treatment step is advantageously interposed between said coating step and the assembly step, so only the cover wire 3 is subjected to said fixing treatment. In other words, the cover wire 3, once coated with the coating preparation so that its surface is provided with a water-repellent coating layer, is preferably subjected to this fixing treatment of said coating layer. coating before being assembled on the soul 2 to constitute the fi! anti-cut 1. This fixing treatment preferably consists of a heat treatment. However, depending on the nature of the coating preparation or the material of the cover wire 3, it could, if necessary, consist of a different treatment, for example by UV irradiation.

This method of manufacture is particularly advantageous when said fixing treatment consists of a heat treatment at a temperature higher than the melting temperatures of the material or materials which form the fibers constituting the core 2, or at least at a temperature above the temperature at from which the fiber or fibers of a material resistant to cutting by sharp objects have their mechanical properties of cut resistance begin to degrade. In the case where said fixing treatment uses a UV irradiation, said manufacturing method would be, by analogy, particularly advantageous when the material or materials which form the fibers constituting the core 2, and in particular those forming the fiber or fibers of a material resistant to cutting by sharp objects, are sensitive to ultraviolet rays, that is to say that their mechanical properties of cut resistance are degraded by these ultraviolet rays. Whatever the nature of the fixing treatment used, the latter advantageously serves to fix, preferably permanently or at least permanently, said water-repellent coating layer on said cover wire 3. To do this, said fixing treatment is therefore a treatment, for example of polymerization of the coating preparation, capable of creating strong physico-chemical bonds between said coating layer and the surface of said cover wire 3 so that said coating layer water-repellent, once subjected to this fixing treatment, gives said cover wire 3 a water-repellent property resistant especially to a large number of household washing cycles and drum drying, typically thirty cycles. In this way, it is understood that, once the cover wire 3 is coated, treated and assembled on the core 2 in order to form said anti-cut wire 1, the latter is provided with a property of resistance to wetting itself. even permanent or at least sustainable. The term "permanent" / "permanent" is, in the context in which we are concerned, used as opposed to "provisional", "temporary". This term applies, typically, since the fixing of the water-repellent coating layer on the cover wire 3 or the wetting resistance properties imparted to the anti-cut-off wire 1 by this water-repellent coating layer are maintained. without significant degradation over a period longer than the lifetime of said anti-cut wire 1, that is to say the time during which the latter retains its anti-cutoff properties. The term "durable" applies preferentially since the fixing of the water-repellent coating layer on the cover wire 3 or the wicking resistance properties imparted to the anti-cut-off wire 1 by this water-repellent coating layer is maintain without significant degradation over a period at least substantially equal to the duration during which the anti-cut properties of the anti-cut wire 1 are intended to be implemented.

The invention further relates, as such, to a garment 1 1 for cut-off protection, for example a glove 12, comprising a textile part 13 made, for example by knitting or weaving, from at least one first wire 14A, 14B according to one or other of the variants F1, F2, F3, F4 of the anti-cut wire 1 described above. Such a garment 1 1 cutting protection thus advantageously offers both a very high resistance to cutting by sharp objects, as assessed according to the standards of ISO 13 997 and EN 388, and excellent resistance at mooring, in particular by liquids such as water, oils and body fluids (blood, etc.). Of course, said garment 1 1 of anti-cut protection may, without departing from the scope of the invention, alternately form, by for example, a protective arm and forearm cuff, a chasuble, an apron, pants or a leggings.

The anti-cut protection garment may advantageously be declined according to a multitude of embodiments and, for example, according to at least the two variants V1, V2, which are preferential described below by way of illustration and not limitation, and illustrated in FIGS. at 7.

According to a first version V1, said textile part 13 that comprises said garment 11 of cut-off protection is made from:

a first wire 14A which comprises a core 2 composed of at least one high tenacity polyethylene fiber 4, and at least one, and preferably only one, cover wire 3 which at least partially covers the core 2, said cover wire 3 being provided over its entire surface with a water-repellent coating layer, so as to impart to said first knit yarn 14A a wetting resistance property,

a second wire 15A which comprises a core 2 composed of a stainless steel fiber 5 and a glass fiber 6 coated with a polypropylene fiber 7 and at least one, and preferably a single, wire covering 3 at least partially covering the core 2, said covering wire 3 being provided over its entire surface with a liquid impervious coating layer, so as to impart to said second knitting yarn 15A a resistance property to anchorage, and - a third fi! 16A which is a fi! of polyester provided throughout its surface with a water-repellent coating layer.

According to a preferred embodiment of this first version V1, illustrated in FIG. 6 in the illustrative form of a glove 12, the first wire 14A is advantageously the anti-cut-off wire 1 according to the variant F1 described above and illustrated in FIG. FIG. 1. It thus preferably comprises a core 2 composed of a single high tenacity polyethylene fiber 4, multi-filament and continuous, coated by assembling a "S" twisted cover wire 3, said cover wire 3 preferably being a polyester yarn, preferably still poly (ethylene terephthalate) (PET), multi-filament and continuous, and provided throughout its surface with a water-repellent coating layer, produced by a step coating followed by a step of fixing process, these steps being advantageously in accordance with the corresponding steps of the manufacturing process of which the description was previously made. The second wire 15A is advantageously the anti-cut wire 1 according to variant F2 described above and illustrated in FIG. 2. It thus comprises, in turn, preferentially a core 2 made up of an assembly of a fiber of continuous monofilament 5 stainless steel and a continuous multi-filament glass fiber 6 coated by "Z" twist assembly of a continuous multi-filament polypropylene fiber 7, this core 2 itself being coated by means of an assembly of a "S" twist yarn 3, said cover yarn 3 being here also preferably a polyester yarn, preferably still poly (ethylene terephthalate) (PET), multi-filament and continuous, and provided on all its surface of a water-repellent coating layer, produced by a coating step followed by a fixing treatment step, these steps being advantageously in accordance with the corresponding steps of the manufacturing process, the description of which was cédemment made. Said third wire 16A can, for its part, be a polyester thread, preferably still poly (ethylene terephthalate) (PET), multi-filament and continuous, and provided on all its surface with a water-repellent coating layer , carried out by a coating step followed by a fixing treatment step, these steps being advantageously in accordance with the corresponding steps of the manufacturing method, the description of which was previously made. This third wire 16A may therefore be substantially identical to the fi! of polyester 10A constituting the cover wire 3 in its preferred embodiment described above.

Preferably, said textile piece 13 is made by knitting, preferably in jersey, and even more preferably in triple-pliage jersey, said first, second and third yarn 14A, 15A, 16A. The knitting of these first, second and third 16A yarns 14A, 15A, 16A is preferably carried out so that said first knit yarn 14A is found positioned on the face of the knitted textile piece 13 forming the protective garment 11 intended to come into contact with the skin of the user, while said second wire 15A, containing the stainless steel fiber 5 and the fiberglass 6, is found positioned on the outer face of the textile piece 13 knitted, so as to limit the risk of irritation of the skin by possible splinters of the steel fiber or fibrils of the glass fiber 6. Preferably, said textile piece 13 that comprises said garment 11 according to this first version V1 is formed by a knit 17 comprising:

- A number of rows per centimeter between 5 and 9, preferably between 6.5 and 7.5, - a number of columns per centimeter between 3 and 7, preferably between 4.5 and 5.5.

This gives, from the data measured at rest, a mesh density per square centimeter advantageously between 15 and 63, and preferably between 29.25 and 41, 25. Such a density of mesh per square centimeter advantageously improves the cut resistance by sharp objects imparted to said garment 11 by the knitting of the first 14A and second 15A yarns described above, so that said garment 11 has ultimately advantageously a cut resistance of level 5/5 according to the scale of the standard EN 388. In addition, this particular knitting of several yarns 14A, 15A, 16A which each have their own property of wetting resistance, coupled to this density of mesh at centimeter square, provides a garment with water repellent properties particularly high and, in fact, particularly impervious to liquids.

According to a second version V2, particularly advantageous, said textile part 13 which comprises said garment 11 of cut-off protection is made from: - a first wire 14B which comprises a core 2 composed of at least one high polyethylene fiber tenacity 4 connected in parallel with an assembly of a stainless steel fiber 5 and a fiberglass 6 coated with a polypropylene fiber 7 and two covering wires 3, assembled on the core 2 so as to form respectively a first 8 and a second 9 superimposed coatings, and - a second wire 15B which is an elastomer wire 18 at least partially covered with a polyester thread, which polyester thread is provided over its entire surface with a coating layer impermeable to liquids.

Preferably, said textile piece 3 is made by knitting, preferably in jersey, and even more preferably in vanised jersey, said first and second yarn 14B, 15B. The implementation of an elastomer yarn 18, for example a yarn elastane 19, improves the overall elasticity of the protective garment 11. In the example illustrated in FIGS. 6 and 7, in which said garment 1 forms a protective glove 12, this improvement of the elasticity advantageously results in a better dexterity, that is to say that said glove 12 is more pleasant to wear because closer to the skin and allows a better grip using the gloved hand. Such a glove 12 does not henceforth not negatively impact the ability and precision of manual movements. In addition, it has been surprisingly observed that knitting a fi! elastomer 8 with anti-cut son 1 as described above, in a certain mass ratio of elastomer relative to the other materials constituting said anti-cut son 1, has the effect of tightening the size of the mesh knit 17 , which leads to a very significant improvement in the resistance of the garment 11 to cut by sharp objects. This beneficial effect is particularly observed, without any negative impact on the dexterity or overall flexibility of the garment 11, for a mass percentage of elastomer of between 1 and 3%, and even more particularly for a percentage close to 1.3%.

According to a preferred embodiment of this second version V2, the first wire 14B is advantageously the anti-cut wire 1 according to the preferred embodiment of variant F3, described above and illustrated in FIG. 3, in which the anti-cut wire cut 1 preferably comprises two cover fi bres 3. It thus preferably comprises:

a core 2 composed of a single high tenacity continuous filament polyethylene fiber 4 mounted in parallel with an assembly of a continuous monofilament stainless steel fiber and a continuous multi-filament glass fiber 6 said stainless steel and fiberglass fibers 6 being coated by "Z" twisted assembly of a multi-filament polypropylene fiber,

a first cover wire 3 completely covering said core 2 by torsion assembly "S", said fi! cover 3 is again preferably a fi! polyester 10A, preferentially still poly (ethylene terephthalate) (PET), multi-filament and continuous,

- And a second cover wire 3, identical to said first cover wire 3 above, and which covers the latter by torsion assembly "Z"; said first and second cover wires 3 being respectively provided over their entire surface with a water-repellent coating layer, produced by a coating step followed by a fixing treatment step, these stages being advantageously in accordance with the corresponding steps of manufacturing method of which the description was previously made.

As specified above, it is alternatively perfectly conceivable that the anti-cut wire 1 has more than two cover wires 3 as described above. Thus, if said cover wire 3 is tinted, for example in the mass, it is possible, depending on the number of cover wires 3 used, to produce a garment 1 1 of anti-cut protection with a colored appearance varying from variegated to the uniform ie the number of cover wires 3 increasing. In this preferred embodiment, said second wire 15B, as illustrated in FIG. 5, is a spandex yarn 19 partially covered, by torsion assembly "S", with a thread. polyester 10A, preferably still poly (ethylene terephthalate) (PET), multi-filament and continuous, and provided over its entire surface with a water-repellent coating layer, produced by a coating step followed by a fixing processing step, these steps being advantageously in accordance with the corresponding steps of the manufacturing method of which the description was previously made. Alternatively, it is also possible, without departing from the scope of the invention, to assemble, not by twisting but by air jet, the polyester thread 10A, when the latter is a multi-filament yarn, on the yarn. Elastane 19. In this way, said second wire 15B is thus indirectly provided on at least a portion of its surface with a water-repellent coating layer. The fi! polyester is, for its part, advantageously substantially identical to the fi! of polyester 10A already described above. In order to further improve wearing comfort, the knitting of these yarns 14B, 15B is preferentially performed so that said first yarn 14B, containing in particular said fiber of stainless steel 5 and fiberglass 6, is found positioned on the outer face of the knit 17, while said second wire 15B, containing the elastane thread 19, is found positioned on the face of the knit 17 forming the protective garment 11 intended to come into contact with the skin of the user. Preferably, said textile piece 13 that comprises said garment 11 according to this second version V2 formed by a knit 17 comprising:

- a number of rows per centimeter between 5 and 10, preferably between 7 and 8, - a number of columns per centimeter between 3 and 8, preferably between 5 and 6.

This gives, from the data measured at rest, a mesh density per square centimeter advantageously between 15 and 80, and preferably between 35 and 48, that is to say a square centimeter density greater than that obtained wireless elastane. Therefore, this second version V2 of making a garment 1 1 of protection with anti-cut son 1, is an improvement of the first version V1, both from the point of view of the properties of cut resistance by sharp objects, resistance to wetting and dexterity, that from the point of view of ease of manufacture, this second version V2 implementing the knitting only two son 14B, 15B against three son 14A, 15A, 16A for the first version V1. The implementation, as described above, of an elastomer yarn 19 knitted with at least one cut-resistant yarn 1 so as to form a garment 1 1 of protection may also constitute, as such, an invention in its own right.

According to a third version V3, which is particularly advantageous when a combination of cut resistance and abrasion resistance characteristics is desired, said textile part 13 that comprises said garment 1 for protection against cutting is made from a first thread 14C which comprises:

a core 2 composed of a subassembly of at least two stainless steel fibers 5 and a glass fiber 6 mounted in parallel and coated with a polypropylene fiber 7, preferably such that said fiber polypropylene 7 partially and even more completely covers said stainless steel and fiberglass fibers 6, this subassembly being itself coated with a high tenacity polyethylene fiber 4 to form said core 2 preferably such that said high tenacity polyethylene fiber 4 partially overlaps said subassembly; and a cover thread 3 chosen from the group comprising a polyamide thread 10B (for example a polyamide thread 6, a high tenacity polyamide thread, a polyamide thread 6.6, a high tenacity polyamide thread, a thread of polyamide 11, a high tenacity polyamide yarn, a recycled polyamide yarn, etc.), a polypropylene yarn and a polyvinyl chloride yarn.

A garment 11 made according to such a third version V3 may be particularly sought for applications related, for example, with the cutting of animal carcasses, such as in particular pig carcasses, whose bones are particularly tapered and abrasive. According to a preferred embodiment of this third version V3, the first wire 14C is advantageously the anti-cut wire 1 according to the preferred embodiment of the fourth variant F4 described above, in which the anti-cut wire 1 preferably comprises two wires. 3. It thus preferably comprises:

a core 2 composed of a subassembly of two continuous monofilament stainless steel fibers and a continuous multi-filament glass fiber 6 connected in parallel and embedded by a "Z" twist assembly of a multi-filament polypropylene fiber 7, so that said polypropylene fiber 7 preferably overlaps, even more preferably completely, said stainless steel fiber 5 and fiberglass 6, this subassembly being itself Z-twist-bonding a high tenacity polyethylene fiber 4 to form said core 2, such that said high tenacity polyethylene fiber 4 partially overlaps said subassembly; and

a first and a second cover wire 3 mounted in parallel so as to completely cover said core 2 by torsion assembly "S", these first and second cover wires 3 preferably being high tenacity polyamide 6.6 wires 10B and being respectively provided over their entire surface with a water-repellent coating layer, carried out by a coating step followed by a fixing treatment step, these steps being advantageously in accordance with the corresponding steps of the manufacturing method, the description of which was previously made. Preferably, as illustrated in FIG. 8, where said garment 1 1 forms a protective glove 12, said textile piece 13 is made by knitting, preferably jersey, said first wire 1 C.

It is furthermore possible to coticotote, for example in jersey and preferably in vanised jersey, said first yarn 14C with a second yarn 15B, as illustrated in FIG. 5, which is an elastomer yarn 18 (by a spandex yarn 19) at least partially covered, by means of an "S" twist connection, of a polyester yarn, preferably still of polyethylene terephthalate (PET), multi-filament and continuous, and provided with all over its surface with a water-repellent coating. It is understood that such an embodiment (not shown) would advantageously provide a garment January 1 having excellent properties of resistance to cutting and abrasion, while providing great dexterity, in accordance with the above .

Whatever the variant F2, F3, F4 of fi! anti-cut 1 and / or version V1, V2, V3 embodiment of the garment 11 retained, wherein said anti-cut 1 wire comprises a core 2 composed of at least one stainless steel fiber 5 and a fiber of glass 6 coated with a polypropylene fiber 7, said step of manufacturing the core 2 preferably comprises a substep of forming a protective sheath of said stainless steel fiber 5 and fiberglass 6. During this sub-step is heated and melted said polypropylene fiber 7 which coats and covers said stainless steel fiber 5 and fiberglass 6 to create around these a protective sheath, advantageously uniform and continuous, made of polypropylene. Thus, as already mentioned above, a much better breaking strength of said stainless steel fiber 5 and fiberglass 6 is obtained and excellent retention of any broken fibrils or fragments. Of low density, polypropylene contributes, moreover, to the lightness of the garment 1 1 of protection.

The invention finally relates, as such, to a method of manufacturing a garment 11 for cut-off protection, for example a glove 12. According to one characteristic of the invention, this manufacturing method comprises a manufacturing step of a textile part 13 by means of at least one, and preferably several, anti-cut wire 1 according to the invention, and for example, to one or other of the variants F1, F2, F3, F4 described above. This textile piece 13 can be presented under the shape of a sheet, that is to say of a textile part extending substantially a plane, or a sleeve, which can subsequently be worked or assembled to form said garment 11 of anti cut, or to present itself directly in the general form of said garment 1. Said textile part 13 is advantageously manufactured by knitting or weaving at least one, and preferably several, cut-resistant yarn 1 according to the invention, and for example, to one or the other of the variants F1, F2 , F3, F4 described above.

The method may preferably be implemented using a knitting machine, as conventionally known, preferably mechanical or electronic, and adapted according to the type of garment 11 to be produced. Thus, the method can be implemented with a circular knitting machine or with a straight knitting machine, if the garment 11 is a glove 12. In the latter case, the straight knitting machine is advantageously a machine capable of knitting a glove 12 in one piece and seamless. The implementation of this manufacturing method according to this preferred embodiment advantageously makes it possible to manufacture a garment 1 1 of anti-cut protection, for example a glove 12, as described above. Alternatively, said textile part 13 may be manufactured by weaving at least one, and preferably several, anti-cut 1 in accordance with the invention, and for example, to one or other of the variants F1, F2, F3, F4 described above, using a loom, preferably mechanical or electronic, adapted to the type of garment 11 to achieve. Such a weave would in fact have the advantage of giving the textile piece 13 a low elasticity and thus contribute to the manufacture of a garment 11 having not only a property of protection against the risk of cuts but advantageously also of a property of protection against the risks of perforation.

POSSIBILITY OF INDUSTRIAL APPLICATION

The invention finds its industrial application in the design, manufacture and use of anti-cut textile yarns, and protective clothing against the risk of cuts by sharp objects.

Claims

Anti-cut wire (1), comprising:

a core (2) at least consisting of a fiber of a material resistant to cutting by sharp objects,

- at least one fi! covering (3) which at least partially covers the core (2), characterized in that the covering wire (3) is provided over its entire surface with a water-repellent coating, so as to impart to said anti-winding yarn -coupure (1) a property of resistance to wetting.

Anti-cut wire (1) according to claim 1, characterized in that the core (2) is composed of at least one high tenacity polyethylene fiber (4).

Anti-cut wire (1) according to claim 1, characterized in that the core (2) is composed of a stainless steel fiber (5) and a fiberglass (6) coated with a fiber of polypropylene (7).

Anti-cut wire (1) according to claim 1 or 2, characterized in that the core (2) is composed of at least one high-tenacity polyethylene fiber (4) mounted in parallel with an assembly of stainless steel (5) and a glass fiber (6), said stainless steel fiber (5) and fiberglass (6) being coated with a polypropylene fiber (7),

Anti-cut wire (1) according to claim 4, characterized in that it comprises two cover wires (3), assembled on the core (2) so as to form respectively a first (8) and a second (9) ) superimposed coatings. anti-cut (1) according to claim 1 or 2, characterized in that the core (2) is composed of a subassembly of at least two stainless steel fibers (5) and a fiber of glass (6) mounted in parallel and coated with a polypropylene fiber (7), which subassembly is itself coated with a high tenacity polyethylene fiber (4) to form said core (2), - anti-cut wire (1) according to any one of the preceding claims, characterized in that said cover wire (3) is a polyester thread (10A). - anti-cut wire (1) according to any one of claims 1 to 6, characterized in that said cover wire (3) is a wire selected from the group comprising a polyamide wire (0B), a polypropylene wire and a polyvinyl chloride yarn. - anti-cut wire (1) according to the preceding claim, characterized in that said cover wire (3) is a wire selected from the group comprising a polyamide wire (6), a polyamide wire (6) high tenacity, a polyamide yarn (6.6), a high tenacity polyamide yarn (6.6), a polyamide yarn (1 1), a high tenacity polyamide yarn (1 1) and a recycled polyamide yarn. - A method of manufacturing an anti-cut wire (1) comprising:

a step of manufacturing or supplying a core (2) consisting at least of a fiber of a material resistant to cutting by sharp objects,

a step of manufacturing or supplying at least one cover wire (3) intended to at least partially cover the core (2), characterized in that said method comprises the following successive steps:

- a coating step, during which the cover wire (3) is coated on its entire surface with a coating preparation to obtain a coating wire (3) coated, said coating preparation being designed to form a water-repellent coating layer over the entire surface of said coating wire (3) coated,

- An assembly step, during which the covering wire (3) is coated with said core (2) so as to cover at least partially said core (2) with said cover wire (3).

- Method according to the preceding claim, characterized in that it further comprises a treatment step, during which the coating wire (3) coated is subjected to a fixing treatment so as to fix said coating layer of water-repellent coating on said cover wire (3). 12 -Procédé according to claim 10 or 1 1 for manufacturing an anti-cut wire (1) comprising a core (2) composed of at least one stainless steel fiber (5) and a fiberglass ( 6) coated with a polypropylene fiber (7), said method being characterized in that said manufacturing step comprises a substep of forming a protective sheath of said stainless steel fiber (5) and fiberglass (6) during which it is heated and melted said polypropylene fiber (7) which covers said stainless steel fiber (5) and fiberglass (6) to create around them a protective sheath polypropylene. 13 -Clothing protective clothing (11), for example a glove (12), characterized in that it comprises a textile piece (13) made from at least a first wire (14A, 14B, 14C) according to any one of claims 1 to 9,

14 - Garment (11) according to the preceding claim, characterized in that said textile piece (3) is made from a first wire (14A) which is in accordance with the object of claim 2 and a second wire (15A) which is in accordance with the object of claim 3, and a third yarn (16A) which is a polyester yarn provided over its entire surface with a water repellent coating layer.

15 -Clothing (1 1) according to the preceding claim, characterized in that said textile piece (3) is formed by a knit (17) comprising: - a number of rows per centimeter between 5 and 9, preferably between 6.5 and 7.5, and

a number of columns per centimeter between 3 and 7, preferably between 4.5 and 5.5.

16 -Clothing (11) according to claim 13, characterized in that said textile piece (13) is made from a first wire (14B) which is in accordance with the object of claim 5 and a second wire (15B) which is an elastomeric yarn (18) at least partially covered with a polyester yarn, which polyester yarn is provided over its entire surface with a coating layer of the same. 17-garment (11) according to the preceding claim, characterized in that said textile piece (13) is formed by a knit (17) comprising:

a number of rows per centimeter between 5 and 10, preferably between 7 and 8, and a number of columns per centimeter between 3 and 8, preferably between 5 and 6.

18 -Clothing (11) according to claim 13, characterized in that said textile piece (13) is made from a first wire (14C) which is according to the object of claim 8 or 9. 19 -Clothing (1 1) according to the preceding claim, characterized in that said textile piece (13) is made from a first wire (14C) which is according to the object of claim 8 or 9 and a second yarn (15B) which is an elastomer yarn (18) at least partially covered with a polyester yarn, which polyester yarn is provided over its entire surface with a water-repellent coating layer; an anti-cut protection garment (11), for example a glove (12), characterized in that it comprises a step of manufacturing a textile piece (13) by means of at least one anti-cut wire (1) according to any one of claims 1 to 9.

21 - Method according to the preceding claim, characterized in that said textile piece (13) is manufactured by knitting or weaving at least one anti-cut wire (1) according to any one of claims 1 to 9.