WO2005071161A1 - Support à base de fibres en cellulose destiné à être siliconé - Google Patents

Support à base de fibres en cellulose destiné à être siliconé Download PDF

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Publication number
WO2005071161A1
WO2005071161A1 PCT/FI2005/000041 FI2005000041W WO2005071161A1 WO 2005071161 A1 WO2005071161 A1 WO 2005071161A1 FI 2005000041 W FI2005000041 W FI 2005000041W WO 2005071161 A1 WO2005071161 A1 WO 2005071161A1
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WO
WIPO (PCT)
Prior art keywords
support
functional group
silicone
cellulose
acid
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PCT/FI2005/000041
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English (en)
Inventor
Menno Dufour
Gilles Gauthier
Original Assignee
Ahlstrom Research And Services
Ahlstrom Corporation
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Publication date
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Publication of WO2005071161A1 publication Critical patent/WO2005071161A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/001—Release paper
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
    • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
    • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
    • D06M13/207—Substituted carboxylic acids, e.g. by hydroxy or keto groups; Anhydrides, halides or salts thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/02—Chemical or biochemical treatment
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic

Definitions

  • the invention relates to a novel support based on cellulose fibres as well as to the manufacturing process thereof. It relates also to the use of the said support for siliconizing.
  • the siliconized supports are used especially as supports of self-adhesive labels or adhesive tapes, for the feminine hygiene market, of envelope and weight price label market, this list not being limiting.
  • the siliconized supports form a structure, on which the self-adhesive labels or products are maintained before the use thereof, thus allowing not only protecting them (especially the adhesive surface thereof), but also favouring the detaching thereof by assuring a perfect adhesive transfer.
  • the silicones intended to be applied on the base support are classified according to their cross-linking mode.
  • a first category consists of the silicones cross-linking under UV irradiation or electron beams. This first category remains in the minority for economical and technical reasons.
  • a second category consists of the so-called "thermal cross-linking" silicones i.e. of silicones cross-linking at a surface temperature of the sheet of between 110 and 130 °C.
  • the support covered with silicone is passed through a kiln, the temperature of which is such that the temperature at the surface of the paper corresponds to the cross-linking temperature of the silicone.
  • the cost and the reactivity of the silicones require that the support, on which they are applied, fulfils a certain number of criteria.
  • the chemical structure of the support must not prevent the silicone system from cross-linking, i.e. the polyaddition reaction between the vinylic functional groups of the silicone resin and the hydrogen siloxane functional groups of the cross-linking agent.
  • the support is capable of fixing the silicone to the surface thereof.
  • the support has to form a barrier and thus limit as much as possilbe the penetration of the silicone inside the support.
  • the surface of the support has to be as regular as possible so as to allow a homogenous application of the silicone.
  • the first problem set is how to develop a support that allows simultaneously an efficient fixing and an optimal cross-linking of the silicone while still reducing as much as possible the penetration of the said silicone inside the support itself.
  • the support intended to be siliconized has to be more or less transparent.
  • transparency is not an essential quality.
  • transparency is required when the siliconized support is intended for the weight/price market.
  • the supports proposed for siliconizing consist of a cellulose support coated with a layer of water-soluble binder and latex able to comprise also pigments.
  • These supports can be manufactured according to different processes by coating, by a size- press or even by a metering size-press followed by a calendering or a supercalendering step. All these techniques allow obtaining supports of different qualities in terms of mechanical resistance, density, silicone barrier property, dimensional stability and, as previously mentioned, transparency.
  • the so-called "coated" papers are distinguished, which have a good dimensional stability, but a lower mechanical resistance, transparency and density.
  • these papers consist of a support based on cellulose fibres covered, by coating, with at least one, even two layers of a mixture common in paper-making, based on pigments (generally kaolin, calcium carbonate), binders (starch, PVA, latex), the coated paper obtained then being calendered.
  • pigments generally kaolin, calcium carbonate
  • binders starch, PVA, latex
  • a second category of supports corresponds to papers known by the denomination of "glassine". These supports have a high density, mechanical resistance and transparency, but a lower dimensional stability than the above-mentioned coated papers. These papers are obtained by coating of a cellulose support by means of a mixture of water-soluble binders of the starch and/or polyvinyl alcohol type generally in the presence of a viscosifying agent, for example a carboxymethyl cellulose (CMC). Unlike the coated papers, the cellulose support is more refined. Moreover and most of all, the coating step is replaced by a surface application step with a size-press or a metering size-press, before a final step, which is not a calendering step but a supercalendering step.
  • a viscosifying agent for example a carboxymethyl cellulose (CMC).
  • glassines of this type are pigment-free.
  • the weight of the coating is between 2 and 4 g/m 2 .
  • These papers correspond to so-called "standard” glassines and they are used especially for the weight/price market, as well as for the double-faced adhesive tape market.
  • a surface application by size-press is technically distinguished from a coating. The treatment by size-press allows treating the two sides of the cellulose support at the same time, as only one operation, whereas the coating is carried out on one side of the support and then possibly on the other side, as two separate operations.
  • a third support category corresponds to supports that could be called “pigmented glassines", the composition of which is very close to that of the previously described glassines, with the difference that the coating mixture contains pigments as well.
  • the fourth type of support corresponds to supports by the name of "SCK", the structure of which is very close to that of a standard glassine, the essential difference being that the supercalendering operation is replaced, in most cases, by a calendering operation. It follows that, compared to a standard glassine, a less transparent and less dense support is obtained.
  • a fifth category of cellulose supports is described in the document WO 01/04418.
  • This document describes a glassine-type of paper, the coating layer of which is distinguished from that of a standard glassine in that it consists of an aqueous solution associating functionalized polyorganosiloxane (POS), grafted with a polymeric material of the acrylic type.
  • POS functionalized polyorganosiloxane
  • the barrier to silicone is considerably enhanced compared to the one obtained with the standard glassines.
  • the second problem that the invention proposes to solve is thus how to develop supports that can be siliconized with LTC, i.e. supports treated so that an efficient and long-lasting anchorage of LTC-silicones is enabled while still maintaining a perfect functionality of the siliconized paper.
  • the length of the stearic or behenic chains gives barrier properties to the obtained paper.
  • the applications cited in this document are essentially from the field of packaging, especially of food packages having a grease barrier. No reference is made to the possibility to use hydrophobic molecules, the free end of which would have a vinylic functional group.
  • WO97/12917 describes the possibility of utilising cellulose microfibrils having the OH functions esterified by an organic compound comprising possibly a radical vinyl. These microfibrils are used as reinforcement fillers in film type composites, or as structuring filler in paints, glues and inks. Usage as filler has two consequences. The first one is that individualized and pretreated microfibrils are in the form of a dispersion mixed directly with the constituent or constituents of the final material. The second one is that cellulose fibres are a minority in the support, in practise less than 25 % by weight.
  • the invention relates to a support based on cellulose fibres, on at least one side of which is grafted at least one organic molecule provided with a function able to create a covalent bond with the free OH functional groups of the cellulose. It is characteristic to this support that the cellulose fibres represent at least 50 % by weight of the support and that the organic molecule has a vinylic functional group.
  • organic molecule can be grafted alone or as a mixture with organic molecules having the same functional characteristics and/or with the organic molecules devoid of one or the other of these functional groups.
  • the vinylic functional group is distinguished from a double bond in that it is positioned at the end of the chain.
  • the vinylic functional group is positioned at the end of the longest chain.
  • support based on cellulose fibres denotes a support comprising cellulose fibres, more or less refined according to the desired characteristics (density, transparency, mechanical characteristics) in practice in proportions of between 80 and 100 % by weight, the balance consisting, if need be, of synthetic fibres, e.g.
  • artificial fibres for example viscose, cellulose acetate
  • natural fibres for example cotton, wool, wood pulp
  • carbon fibres possibly active
  • mineral fibres for example glass fibres, ceramic fibres
  • mineral fillers such as starch, kaolin, CaC0 3 etc.
  • organic molecule should be understood to mean a molecule containing at least one element from C, H, O, N, nonmetals such as for example Cl, Br, F, I, S, P, metals such as Na, Li, K, Mg, Pb etc.
  • the organic molecule may be the result of a mixture of organic molecules corresponding to the definition above.
  • the functional group of the organic molecule capable of creating a covalent compound with the free OH functional groups of the cellulose may concern a functional group chosen from a group comprising acid halide functional group, alkyl halide functional group, sulphonyl halide functional group, format halogen functional group, acid anhydride functional group (cyclic or linear), alkyl ketene dimer, alkylene oxide, isocyanate, aldehyde, di alkyl sulphate, the halide functional group being chosen from a group comprising chlorine, fluoride, iodine and brome.
  • the organic molecule represents less than 5 %, advantageously between 0.01 and 1.5 %, by weight of the support.
  • the functional group is an acid chloride functional group.
  • the organic molecule is undecylenic acid chloride.
  • the organic molecule is pentanedioic acid, monoundec-10- enyl ester monochloride, which has the following formula:
  • This molecule is obtained by an acylation reaction of ⁇ -undecylenic alcohol on glutaric anhydride at temperatures in the order of 100°C.
  • the generated carboxylic acid is then chlorinated in the presence of carbonyl chlorine (COCI 2 ).
  • the skeleton of the molecule consists of 16 carbon atoms and one oxygen atom coming from the ester bond.
  • the organic chain thus contains 17 atoms, 3 of which are heteroatoms and is functionalized with a double vinylic bond at one of the ends and an acid chloride functional group at the other end. In the rest of the description and in the examples, this molecule is called
  • the organic molecule is butanedioic acid, mono-5-hexenyl ester, monochloride, which has the following formula:
  • This molecule is obtained by a reaction of 5-hexanol on anhydride succinic and subsequent chlorination of the generated carboxylic acid functional group.
  • the organic molecule is pentanedioic acid, mono-5-hexenyl ester, monochloride, which has the following formula:
  • This molecule is obtained by a reaction of 5-hexanol on anhydride glutaric, after which the generated carboxylic acid functional group is chlorinated.
  • the organic molecule is glycolic acid, mono-10-undecenyl ester, monochloride, which has the following formula:
  • This molecule is obtained by reaction of the undecylenic acid on the glycolic acid hydroxyl functional group, after which the generated carboxylic acid functional group is chlorinated.
  • the organic molecule is butanedioic acid, monoundec-10-enyl ester, monochloride, which has the following formula:
  • This molecule is obtained by reaction of 10 undecenol on anhydride succinic, after which the generated carboxylic acid functional group is chlorinated.
  • the support based on cellulose fibres may be in several forms.
  • the support based on cellulose fibres may correspond to a coated paper.
  • the support based on cellulose fibres is covered on one side, by coating at least one, even two, layers of a mixture common in paper-making, the grafting of the organic molecule, on this same side, being carried out either before or after the calendering.
  • the cellulose support is covered with a composition based on: - pigments, - water-soluble binders, - latex, - common additives, the composition being deposited in an amount of from 5 to12 g/m 2 as dry matter and the support being calendered, either before or after the grafting of the organic molecule.
  • the coated paper, grafted on one side is grafted on the other side.
  • the second side can be coated beforehand.
  • the grafting is carried out before or after the calendering step.
  • the paper is coated on one side and grafted on the other side, before or after the calendering.
  • the pigments can be of different nature, such as the kaolin, the aluminium hydroxide, talc etc., even though the calcium carbonate is preferred in practice. Likewise, starch, PVA etc. is advantageously used as a water-soluble binder.
  • latex denotes submicronic particles of polymers, such as for example butadiene styrene, vinyl acetate and acrylic polymers, dispersed into the water and stabilized by the presence of surfactants.
  • additives common additives
  • insolubilizing agents the viscosifying agents, the antifoams and all the compounds necessary for the good rheology of the composition.
  • Another type of cellulose support able to be treated with the organic molecules of the invention, corresponds to the glassines.
  • the cellulose support is coated with a pigment-free composition and contains: - between 90 and 100 % by dry weight of water-soluble binders, - the balance to 100 % consisting, if need be, of common additives, the composition being deposited in an amount of from 2 to 4 g/m 2 as dry matter, for the two sides.
  • the composition contains, as a water-soluble binder, polyvinyl alcohol and starch.
  • this type of support is obtained by surface application of the composition with a size-press or a metering size-press on the two sides of the refined support based on cellulose fibres, followed by a supercalendering or a simple calendering step.
  • the supercalendering operation proper makes this support a paper corresponding to the definition of the glassine, i.e. a high transparency and density support having enhanced mechanical characteristics, as well as an excellent barrier to silicone.
  • one or two sides of the standard glassine or the SCK can be grafted. Furthermore, it is possible, according to the desired quality of the support, not to proceed to the calendering or supercalendering step.
  • the cellulose support can also be a support comprising pigments, called also by the name "pigmented glassine".
  • the support is coated with a composition based on: - pigments, - water-soluble binders, - latex, - common additives, the composition being deposited in an amount of from 4 to 8 g/m 2 and the support being supercalendered before or after the grafting of the organic molecule.
  • the grafting can be carried out on one or two sides of the cellulose support. Moreover, according to the desired quality of the support, it is possible not to proceed to the supercalendering step.
  • the grafting is carried out directly on the cellulose support, on one or two sides, in the absence of any preliminary treatment by a size-press, by a metering size-press or by coating, and before or after a possible calendering or supercalendering step.
  • any solid material having hydroxyl functional groups, on which the organic molecule of the invention is grafted is also part of the invention.
  • the organic molecule is the pentanedioic acid, monoundec-10-enyl ester monochloride.
  • the object of the invention is also the above-described supports covered with silicone in practice in an amount of from 0.3 to 2 g/m 2 , advantageously of between 0.5 and 0.8 g/m 2 , preferably of 0.6 g/m 2 .
  • the quantity of the silicone applied depends on the characteristics of the base support.
  • the invention relates also to the manufacturing process of the support based on cellulose fibres.
  • the invention relates also to a manufacturing process of a support based on cellulose fibres, according to which the previously described organic molecule is grafted on one or two sides before or after a possible calendering or supercalendering, the cellulose support having being or not treated beforehand by coating one or two sides by a size-press or by a metering size-press.
  • the grafting is respectively carried out in two steps of: - applying organic molecule on the support, - subjecting the support thus treated to a gaseous flow, which is neutral with regard to the grafting reaction, at a temperature below the boiling temperature of the organic molecule.
  • the organic molecule is put in solution and then the solution is applied on the support.
  • the organic molecule is sprayed directly on the support.
  • the invention concerns also the use of the support based on cellulose fibres such as previously described for the siliconizing. It can involve thermal siliconizing at high temperature of between 110 and 130 °C, but also siliconizing with the LTC-silicones cross-linking at temperatures below to 100 °C. In this latter case, the applicant has in fact noticed, that the grafting of the organic molecule allowed fixing the LTC-silicones.
  • the figures 1 and 2 represent the penetration factors of the reagents Shirlastain and Malachite according to the quantity of the silicone layer applied on the non treated glassines (SiY 2010) and the same glassines treated with a constant concentration of undecylenic acid.
  • the figures 3 and 4 represent the penetration factors of the reagents Shirlastain and Malachite according to a growing concentration of undecylenic acid for a constant coating of silicone.
  • the figure 5 represents the penetration factors of the reagent Green Malachite according to the different quantities of the silicone layer applied on the non treated glassines and glassines treated at different concentrations of the pentanedioic acid, monoundec-10-enyl ester monochloride.
  • the figure 6 represents the penetration factors of the reagent Green Malachite according to the different quantities of the silicone layer applied on the non-treated glassines and glassines treated at a concentration of 0.25% of the pentanedioic acid, monoundec-10-enyl ester monochloride.
  • the figure 7 represents penetration factors of the reagent Green Malachite according to the different quantities of the silicone layer applied on the non-treated glassines and glassines treated at a concentration of 0.25 % butanedioic acid, mono-5-hexenyl ester monochloride (C11), pentanedioic acid, mono-5-hexenyl ester monochloride (C12) and glycolic acid mono-10-undecylen ester monohloride (C14).
  • the fixing and the cross-linking of the silicone are compared when the cellulose support is treated with four different organic molecules.
  • Organic molecules - an organic molecule free of a vinylic functional group, such as stearic acid chloride (C 18 ): CH 3 -(CH 2 ) ⁇ 6 -CO-CI or behenic acid chloride (C 22 ): CH 3 -(CH 2 ) 20 - CO-CI, - an organic molecule having a double bond integrated in the carbonaceous chain, such as e.g.
  • the grafting of these molecules in the form of chloride is carried out at concentrations of between 0.1 and 1.5 % by weight and this is done on finished cellulose supports, i.e. on calendered cellulose supports.
  • Each of the supports is immersed in a solution of acid chloride into a solvent of petroleum ether solvent for 10 seconds.
  • the amount of solvent absorbed by the support is determined beforehand in order to determine the suitable concentration.
  • the reaction is carried out for 30 minutes at 100°C. Papers
  • the paper supports used are the following: - SILCA 2010 Yellow (64 g/m 2 ) standard glassine: reference 1 , - Prototype of glassine generating a poor fixing of the silicone: reference 2, - SILKRAFT 9564 White (62 g/m 2 ) standard glassine: reference 3.
  • the silicone provided by RHODIA is composed of a system consisting of: - polydimethylsiloxane Rhodia PDMS 11367, molecular mass 10 000 g/mol, n: 130, - cross-linking agent (Rhodia XL 12031 , molecular mass 3 000 g/mol, n: 50), - platinum catalyst (Rhodia catalyst 12070).
  • the silicone bath contains: - 25 g of PDMS 11367, 1.45 g of cross-linking agent 12031 , and - 0.78 of platinum catalyst 12070.
  • the silicone is applied on the cellulose support by means of a blade coater (Euclid). In all the cases, the pressure of the blade is adapted to the thickness of the silicone, which is about 1 ⁇ m.
  • the sample After coating the paper with a amount silicone of 1 g/m 2 , the sample is subjected to cross-linking in a ventilated kiln at 150 °C for 30 seconds.
  • Rub Test This internal test measures the residual silicone content of the siliconized paper after an abrasion operation of the described siliconized surface according to an internal standard.
  • a low value of the Rub Test means a poor fixing of the silicone film on the support (Rub off). With the silicone formula used in the examples, the fixing of the silicone is estimated to be good if the Rub Test value is higher than 90 %.
  • Cross-linking analysis It is measured by means of a test called Poly Test. This internal test measures the residual silicone content of a siliconized paper after immersion into an organic solvent. A value ⁇ 95 % means a dissatisfactory cross-linking of the silicone film on the support, whatever the used silicone system may be.
  • the silicon barrier ability is measured with a laboratory siliconizing test.
  • a silicone covering is considered good if the silicone film applied on the paper remains sufficiently at the surface thereof, thus allowing a homogenous protection of the paper surface for the further transformation steps (gluing, die cutting etc.).
  • a paper generating a good silicone barrier ability is a paper allowing obtaining a good silicone covering with a silicone coating in a smaller amount than that of the reference paper.
  • the silicone covering is evaluated with the coloured reagents called Green Malachite or Shirlastain A, which, applied at the surface of the siliconized paper, react according to the level of protection given by the silicone film: (respectively + green and - yellow if the silicone covering is insufficient), the obtained tones being analysed with a colorimetry technique and expressed by an IP-value in per cent.
  • Green Malachite or Shirlastain A which, applied at the surface of the siliconized paper, react according to the level of protection given by the silicone film: (respectively + green and - yellow if the silicone covering is insufficient), the obtained tones being analysed with a colorimetry technique and expressed by an IP-value in per cent.
  • the two reagents are concerned, the lower the IP-value, the better the silicone covering.
  • the curves of the figures 1 and 2 show the penetration factor with the reagents Shirlastain and Green Malachite with different silicone coatings of between 0.6 and 1 g/m 2 on the non-treated glassines (SiY 2010) and of the same glassines treated with undecylenic acid chloride at a constant concentration.
  • the figures 3 and 4 represent the penetration factor curves with Shirlastan A and Green Malachite when the silicone is applied in an amount of 0.60 g/m 2 for a growing C11 concentrations. As showed by these curves, a small amount of acid chloride allows dividing the IP by two.
  • the support used is a support called SILCA CLASSIC (standard glassine) (60 g/m 2 ) sold by the applicant.
  • the grafting of organic molecule on the support is obtained in the same conditions as those indicated in the example 1.
  • the silicone, the siliconizing conditions, the fixing analysis and the cross- linking analysis are carried out in the same conditions as in example 1.
  • silicone barrier ability As for the silicone barrier ability, it is evaluated according to the same colorimeter technique (Green MALACHITE) than the one described in the preceding example 2.
  • LTC-silicone The LTC-silicone provided by Wacker composed of a system: - of polydimethylsiloxane PDMS D 920, - of a cross-linking agent V 525 XL, - of a platinum catalyst C 05.
  • the Wacker LTC-silicone bath contains: - 18.074 g of PDMS D 920, - 1.432 g of cross-linking agent V 525 XL, - 2.14 g of platinum catalyst C 05.
  • the silicone is applied on the cellulose support as in the previous examples by means of a blade coater (Euclid). In all the cases, the pressure of the blade is adapted so that the quantity of the deposited silicone is of 1 g/m 2 . After the deposit on the paper, the sample is subjected to the cross-linking in a ventilated kiln at 80 °C for 30 seconds.
  • the fixing analysis (Rub Test) and the cross-linking analysis (Poly Test) are carried out in the same conditions as in the example 1.
  • the grafted saturated acid chloride does not enhance the fixing of LTC-silicone on the cellulose support.
  • the molecule of the invention composed on the other hand of an acid chloride functional group at one of the ends thereof, and on the other hand of a double vinylic bond at the other end thereof, allows strongly enhancing the fixing of the silicone of the LTC-type (Low Temperature Curing) on a cellulose support while still maintaining a perfect cross-linking of the LTC-silicone system.
  • LTC-type Low Temperature Curing
  • EXAMPLE 5 Support treated with butanedioic acid, mono-5-hexenyl ester monochloride (Cn), pentanedioic acid mono-5-hexenyl ester monochloride (Ci?) and glycolic acid mono-10 undecylen ester monochloride (C ⁇ )
  • the used support is a support called SILCA CLASSIC (standard glassine) (60 g/m 2 ) sold by the applicant.
  • the grafting of the organic molecule on the support is obtained in the same conditions as those indicated in example 1 at a concentration corresponding 0.25 % by weight.
  • silicone, siliconizing conditions, fixing analysis and cross-linking analysis are carried out in the same conditions as in example 4 (use of LTC silicone or the sample is subjected to cross-linking in a ventilated kiln at 80°C during 30 seconds).
  • silicone barrier is, in its turn, evaluated according to the same colorimetric technique (Green Malachite) as the one described in example 2 earlier. 1. Poly Test and Rub Test
  • the tested molecules represent nearly perfect rub test and poly test results, which was not the case with a non-treated support, where the silicone adhesion is relatively weak (rub test of 14 %) (cf. example 4).
  • Silicone barrier IP Green Malachite test
  • the glassine is treated with a quantity of Cn, C 12 and C 1 equal to 0.25 % during 30 minutes at 100°C.
  • the support is then coated with a quantity of silicone of between 0,3 g/m 2 and 1 g/m 2 .
  • the results are represented in figure 7.
  • Reference glassine shows an IP value of 33 % for a silicone quantity of 0.3 g/m 2 .

Abstract

L'invention concerne un support à base de fibres en cellulose sur lequel est greffée au moins une molécule organique comprenant un groupe fonctionnel halogénure acide pouvant créer une liaison covalente avec les groupes fonctionnels OH libres de la cellulose après libération de l'halogénure d'hydrogène, caractérisé en ce que la chaîne la plus longue de la molécule organique possède, au niveau de son extrémité libre, un groupe fonctionnel vinylique. L'invention concerne également l'utilisation de ce support pour le siliconage.
PCT/FI2005/000041 2004-01-23 2005-01-20 Support à base de fibres en cellulose destiné à être siliconé WO2005071161A1 (fr)

Applications Claiming Priority (2)

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FR0450120 2004-01-23
FR0450120A FR2865482B1 (fr) 2004-01-23 2004-01-23 Nouveau support a base de fibres cellulosiques destine a etre silicone

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Cited By (9)

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WO2009147283A1 (fr) 2008-06-03 2009-12-10 Upm-Kymmene Corporation Composition de revêtement de démoulage, matériau de base et procédé de fabrication d'un matériau de base, et agent de traitement de surface pour matériau de base et utilisation d'un agent de traitement de surface
DE202011003029U1 (de) 2010-02-23 2011-08-01 Ahlstrom Corp. Träger auf Cellulosefaser-Basis, der eine modifizierte PVA-Schicht enthält
US20120183771A1 (en) * 2011-01-19 2012-07-19 Ahlstrom Corporation Fibre-based support containing a layer of a functionalized water-soluble polymer, method of production and use thereof
EP2551406A1 (fr) 2011-07-29 2013-01-30 Ahlstrom Corporation Support à base de fibres contenant une couche de polymère hydrosoluble fonctionnalisé, procédé de production et utilisation associée
WO2015197906A1 (fr) 2014-06-26 2015-12-30 Upm-Kymmene Corporation Revêtement intérieur antiadhésif comportant de la cellulose nano-fibrillaire
US10370797B2 (en) * 2014-09-26 2019-08-06 Ahlstrom Corporation Cellulosic fiber-based substrate, method of production and use as a substrate for adhesive tapes
US10731298B2 (en) 2012-06-15 2020-08-04 University Of Maine System Board Of Trustees Release paper and method of manufacture
WO2020188138A1 (fr) 2019-03-18 2020-09-24 Upm-Kymmene Corporation Procédé de fabrication d'un dérivé de poly(alcool vinylique) thermoplastique dans une réaction à l'état fluide et produits associés
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JP2015180792A (ja) * 2010-02-23 2015-10-15 ムンクスイェ オーワイジェイ 改質ｐｖａ層を含有するセルロース繊維ベースの支持体、並びに、その製造及び使用の方法
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