Peelable film acting as temporary support

Abstract

The present invention relates to a peelable film acting as a temporary support, which comprises a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, said substrate being selected from the group consisting of plastic materials or metal compounds, and a SiC x O y and a thin film comprising at least one compound consisting of: H and at least one SiCH functional group, the first side of the thin film being attached to the substrate and the second side of the thin film being positioned to receive the polymerizable reaction composition, the thin film having a tunable peel strength greater than 5 N / 25 mm, and the thin film having a surface roughness comparable to the surface roughness of the substrate.

Description

[Background technology]

[0001] The present invention relates to a peelable film that functions as a support to allow polymerization of a reactive composition.

[0002] Generally, the peelable film provides temporary support for the product and is removed at the time of use.

[0003] There are several ways to obtain such films, and they are generally obtained by surface treatment of the substrate, which can be made of polymers. To obtain a thin film on the substrate, deposition can be carried out in a variety of ways.

[0004] These thin films are typically used to reduce adhesion between the substrate and the product to be protected, and typically have a "release" effect that allows the film to be easily removed.

[0005] However, these films are not suitable for coating polymerizable or reactive compositions thereon. One of the main drawbacks is the poor adhesion between the peelable film and the polymerizable composition, or the wetting of the surface during coating. Therefore, their use as a support is difficult.

[0006] Furthermore, other known peelable films are also limited in that they do not ensure good adhesion of the peelable film during coating of the polymerizable composition (wetting of the surface) and even when the composition is subsequently polymerized.

[0007] Known peelable films have adhesive properties such that they do not provide sufficient support, adhesion and retention to facilitate handling of reactive or polymeric compositions, such as polyurethanes or resins.

[0008] Thus, there is a real need to provide a peelable film that can function as a support (primer) to allow the application of a polymerizable reactive composition. In this regard, it is desirable to ensure a support effect throughout its use, maintain sufficient film retention over time, and maintain sufficient adhesion between elements to allow removal of the peelable film when required for the intended application. Summary of the Invention

[0009] To solve this problem, the present invention provides a peelable film that functions as a temporary support and is arranged to allow polymerization of a reaction composition comprising a compound that contains at least one isocyanate terminal group and a compound that has a group reactive with said at least one isocyanate terminal group, The peelable film is a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, said substrate being selected from the group consisting of a plastic material or a metal compound; SiC x O y a thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, said thin film having a first side and a second side, said first side of said thin film attached to said first side of said substrate and said second side of said thin film positioned to receive said polymerizable reactive composition; 1. A peelable film, characterized in that the thin film has an adjustable peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm, and the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the first side of the substrate, and optionally the substrate and the thin film are positioned to allow transfer of roughness from the substrate to the surface of a polymerizable composition.

[0010] Preferably, the polymeric composition is based on a polyurethane or resin.

[0011] The peelable film according to the present invention thus functions as a support, i.e., a base support, for the multi-film system. That is, the second surface of the thin film is ready to receive a (reactive) composition, preferably a polymerizable composition. This ensures a homogeneous application on the peelable film, facilitating application. Furthermore, the film, i.e., the peelable film and the composition, do not separate during or after application, which is particularly advantageous for the user. This allows for easy handling of the assembly according to the intended method. For example, the multi-film product can be precisely cut.

[0012] Finally, the peelable film can also be easily removed without damaging the surface of the composition, which gives the film according to the present invention many versatile uses.

[0013] Also, the longevity of films according to the present invention, particularly when comprised of polymeric compositions, has been found to be advantageous in that the films retain their peel strength and surface energy properties after a period of at least three months.

[0014] By controlling the adhesive energy provided by the peel strength, it is possible to provide a peelable film that has sufficient adhesive strength to handle and cut multi-film products without the films separating from each other when used as a support. However, the adhesive strength is low enough that the support film can be peeled off without damaging the molded product or leaving any marks. The peelable film of the present invention can be peeled off by hand or by thermal transfer to another substrate. In addition, the silicone content in the film of the present invention is limited, which can prevent transfer to the composition (material applied to the second surface of the thin film).

[0015] Surprisingly, it has been found that when a thin film is formed on a substrate, the thin film conforms to the surface roughness of the substrate. Thus, the thin film substantially matches the surface roughness of the substrate, which is particularly surprising. This also applies to gloss. Suppose the substrate has a gloss value of 50. After the thin film is formed, this gloss value remains at the same level as the thin film (i.e., approximately equal to the gloss value of the substrate). This is advantageous for the user.

[0016] Furthermore, the substrate and the thin film are optionally arranged to allow transfer of roughness from the substrate to the surface of the polymeric composition, in other words, the polymeric composition, which may be in the form of a coating, has the same roughness obtained through transfer, as well as gloss.

[0017] More specifically, this also means that the gloss level of the substrate is not adversely affected by the deposition of the thin film.

[0018] Preferably, the support provided by the peelable film is effectively secured over time during and after application of the composition, preferably a polymerizable composition.

[0019] The compositions according to the invention are in the form of inks (preferably polyurethane or resin) that are subsequently applied to enable the pattern to be transferred onto a T-shirt or any other substrate, sprayable compositions, or printable compositions, such as those intended for application to vehicles (commonly called "cast wrapping films"), preferably printable coatings on the films of the invention.

[0020] Alternatively, in the case of a polymerizable reactive composition, the latter is applied (e.g., sprayed, flowed, coated, printed, etc.) to a thin film. If the reactive composition comprises a compound containing a polyol and a compound containing an isocyanate end group, a polyurethane is formed on the thin film. The resulting product is cured (e.g., using a heating oven). The peelable film can be removed when the coating is ready for use.

[0021] Preferably, the polymerizable reaction composition according to the invention is an optionally prepolymerized resin selected from the group consisting of epoxy resins, polyimide resins, phenolic resins, bismaleimide resins, cyanoacrylate resins, and mixtures thereof. Advantageously, the resin is an epoxy resin for "prepreg" type systems as defined below.

[0022] Typically, the side of the coating that was in contact with the thin film is then applied to various applications, particularly as a "cast (wrapping) film" or to cover any type of object, to form the desired film. Also, when the composition is an ink for forming a polyurethane pattern, this type of application is often used to allow the pattern to be transferred from one substrate to another, such as a T-shirt.

[0023] Preferably, the peelable film according to the present invention is advantageously designed to allow the polymerization of a reaction composition comprising a compound comprising at least one terminal isocyanate group and a compound having a group reactive with said at least one terminal isocyanate group.

[0024] Advantageously, the peel strength of the second side of the thin film, measured according to the FINAT10 (FTM10) standard using Tesa® 7475 adhesive, is less than 30 N / 25 mm, preferably less than 28 N / 25 mm, more preferably less than 25 N / 25 mm, even more preferably less than 15 N / 25 mm, advantageously less than 10 N / 25 mm, more advantageously less than 8 N / 25 mm, and even advantageously less than 5 N / 25 mm.

[0025] The film may also be preferably used as a support to allow ink, preferably polyurethane or resin based, to be applied for transfer to another substrate.

[0026] It has also been found that the effects of the present invention can be achieved with an adjustable peel strength of more than 5 N / 25 mm. One of the features of the present invention is that this peel strength is adjustable and can reach values ​​up to 15 N / 25 mm, preferably up to 29, 30, 31, 32, 33, 34 or 35 N / 25 mm.

[0027] Preferably, the thin film has a thickness of 6 nm or less, preferably 5 nm or less, more preferably 3 nm or less. More preferably, a thickness of 1 nm can be achieved. This makes it possible to provide a thin film containing a certain amount of silicone depending on the desired application while maintaining the advantages described in the context of the present invention.

[0028] Advantageously, the film of the invention has a surface energy of 20 to 30 mN / m, preferably 25 to 30 mN / m.

[0029] Controlling the surface energy allows for easy application of the composition by limiting or avoiding any dewetting zones, thereby allowing for a uniform, defect-free application, preferably a coating, of the composition.

[0030] The combination of surface energy and peel strength advantageously makes it possible to provide a more effective peelable film. This is even more advantageous when the peel strength of the second side (consisting of the polymeric composition) of the thin film according to the invention, measured according to the FINAT 10 (FTM 10) standard using Tesa® 7475 adhesive, is less than 30 N / 25 mm, preferably less than 28 N / 25 mm, more preferably less than 25 N / 25 mm, even more preferably less than 15 N / 25 mm, advantageously less than 10 N / 25 mm, more advantageously less than 8 N / 25 mm, and even more advantageously less than 5 N / 25 mm. This peel strength therefore advantageously characterizes the second side of the thin film intended to come into contact with the polymeric composition.

[0031] More preferably, said substrate consists of a polymeric material, preferably a biaxially oriented polymeric material.

[0032] Advantageously, the substrate is a film made of polyester, polyimide, polyamide, polyetherketone and derivatives thereof.

[0033] Even more advantageously, when the polymerizable reaction composition is a resin according to the invention, optionally a prepolymerized resin, the substrate consists of a PET film or a polyimide.

[0034] More preferably, the substrate is coextruded and / or biaxially oriented.

[0035] Preferably, the substrate is a film made of a material selected from the group consisting of polyethylene terephthalate (PET), polyimide, polyamide, poly(ethylene naphthalate) (PEN), polyether ether ketone (PEEK), and derivatives thereof, and thus these materials are preferably capable of being coextruded and biaxially oriented.

[0036] In particular, PET is a preferred choice when the polymerizable composition consists of at least one polyisocyanate and one polyol to form a polymerized polyurethane as defined in accordance with the present invention.

[0037] Advantageously, polyimides are selected in combination with resins as defined in the present invention.

[0038] According to a preferred embodiment, the peelable film acting as a temporary support also comprises an optionally prepolymerized resin, a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, said substrate being selected from the group consisting of a plastic material or a metal compound; SiC x O ya thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, said thin film having a first side and a second side, said first side of said thin film adhering to said first side of said substrate and comprising said resin, optionally prepolymerized, on its second side; a peelable film, characterized in that the thin film has an adjustable peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm; and the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the first side of the substrate, optionally with the substrate and thin film arranged to allow transfer of roughness from the substrate to the surface of a polymeric composition.

[0039] All the above mentioned properties can be combined in this preferred embodiment in the presence of a (pre-polymerized) resin.

[0040] Advantageously, the peelable film according to the invention comprises: providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; providing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; rolling the substrate having a first surface in a coating cell equipped with a plasma, preferably in a roll-to-roll apparatus; exposing the first surface of the substrate to low temperature plasma deposition in the presence of the precursor for applying plasma polymerization, preferably using a dielectric barrier discharge (DBD), in an atmospheric pressure chamber in the presence of a gas atmosphere consisting of the plasma gas; forming and depositing the thin film on the first surface of the substrate, the thin film comprising SiC x O yand forming said thin film, which comprises at least one compound consisting of: H and at least one SiCH functional group, where x is at least 2 and y is at least 0.5, and which can be obtained (or can be directly obtained) by atmospheric pressure plasma processes preferably applied successively.

[0041] Particularly advantageously, the exposure of the first side of the substrate is carried out for a time period between 50 and 2500 milliseconds.

[0042] According to a particular embodiment, the exposure is carried out by maintaining the plasma chamber and / or the substrate at a temperature below 100° C. in a chamber at atmospheric pressure.

[0043] According to a preferred embodiment, the cyclic siloxane is selected from the group consisting of hexamethylcyclotrisiloxane (D3), octamethylcyclopentasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), vinyl 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane and mixtures thereof.

[0044] The linear siloxane is preferably selected from compounds having the following structure: [SiO(CH3)2]n, where n is at least 2.

[0045] More preferably, the linear siloxane is selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and 1,1,3,3-tetramethyl-1,3-divinyldisiloxane.

[0046] Advantageously, the total amount of plasma gas is injected at a flow rate of 45 to 80 m3 / h, preferably 45 to 75 m3 / h, for a useful membrane width of 2 m.

[0047] Advantageously, the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. Particularly advantageously, the substrate feed speed is coupled to a certain total amount of injected plasma gas.

[0048] More advantageously, the precursor is injected at a flow rate of between 50 and 200 g / h, preferably between 50 and 150 g / h, more preferably between 75 and 115 g / h for a useful film width of 2 m, and preferably the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. These two flow rate and feed speed parameters can be combined.

[0049] According to a preferred arrangement, the method further comprises, after forming the thin film, applying a composition, preferably a polymerizable reactive composition, to the second surface of the thin film.

[0050] As explained above, the support film used as the base film can contain a composition according to the invention, which is preferably polymerizable and can be a resin (derived from a prepreg) or can be obtained by reacting a polyisocyanate with a polyol, as described in this application.

[0051] In the case of prepolymerized resins (prepreg derived), a peelable film according to the present invention can be applied to the resin for protection.

[0052] For example, in the case of manufacturing a prepreg, a resin can be applied to a film according to the present invention, which can then be laminated with a reinforcing material (e.g., carbon fiber) to transfer the resin. This can be done on both sides of the reinforcing material (carbon fiber). In other words, the film according to the present invention is present on both sides of the prepreg. Then, one of the two films can be peeled off and the other can be held, allowing the film to be wound on a reel and stored. In this way, the peel strength can be differentiated and adjusted according to the required requirements.

[0053] Other methods for producing prepregs are possible and known to those skilled in the art. Preferably, the polymerizable reactive composition is obtained by reacting a compound containing at least one terminal isocyanate group with a compound having a group capable of reacting with the at least one terminal isocyanate group, or by applying an optionally prepolymerized resin.

[0054] Examples of polyfunctional isocyanates include, but are not limited to, ethylene diisocyanate; 1,4-tetramethylene diisocyanate; 1,6-hexamethylene diisocyanate; 1,12-dodecane diisocyanate; cyclobutane-1,3-diisocyanate; cyclohexane-1,3- and -1,4-diisocyanate and mixtures of their isomers; isophorone diisocyanate; 2,4- and 2,6-hexahydrotoluene diisocyanate and mixtures of their isomers; dicyclohexylmethane-4,4'-diisocyanate (hydrogenated MDI or HMDI); 1,3- and 1,4-phenylene diisocyanate; 2,4- and 2,6-toluene diisocyanate and mixtures of their isomers (TDI); diphenylmethane-2,4'- and / or -4,4'-diisocyanate (MDI); naphthylene polyphenyl-polymethylene-polyisocyanates (polymeric MDI) of the type obtained by condensation of aniline with formaldehyde followed by phosgenation; m- and p-isocyanatophenylsulfonyl isocyanate; perchlorinated aryl polyisocyanates; polyfunctionally modified isocyanates containing carbodiimide groups, urethane groups, allophanate groups, isocyanurate groups, urea groups, or biuret groups; polyfunctional isocyanates obtained by telomerization reactions, polyfunctional isocyanates containing ester groups; and polyfunctional isocyanates containing fatty acid groups. Those skilled in the art will recognize that mixtures of the above polyfunctional isocyanates can be used, preferably polymeric MDI and mixtures of MDI isomers.

[0055] The compound having a group reactive with at least one terminal isocyanate group is advantageously a polyfunctional polyol or a polyfunctional amine.

[0056] The multifunctional polyol according to the present invention may be, but is not limited to, a polyether polyol, a polyester polyol, a bio-based or renewable polyol, a polyol polymer, or a flammable polyol, such as a phosphorus-based or halogen-based polyol, which may be used alone or in combination as a mixture.

[0057] The amount of the polyfunctional polyol may be 10 to 90% by weight, preferably 30 to 80% by weight, based on the total weight of the polymerizable composition.

[0058] Polyether polyols according to the present invention include alkylene oxide polyether polyols, such as ethylene oxide polyether polyols and propylene oxide polyether polyols, as well as ethylene and propylene oxide copolymers with terminal OH groups derived from polyhydric compounds, including diols and triols, such as ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, pentaerythritol, glycerol, diglycerol, trimethylolpropane, and similar low molecular weight polyols.

[0059] Polyester polyols according to the present invention include, but are not limited to, those prepared by reacting a carboxylic acid with an excess of a diol, such as adipic acid with ethylene glycol or butanediol, or a lactone with an excess of a diol, such as caprolactone with propylene glycol. Additionally, polyester polyols according to the present invention may also include linear (partially) branched aliphatic polyols (mainly adipates) with terminal OH groups; low molecular weight aromatic polyesters; polycaprolactones; and polycarbonate polyols. Branched or linear aliphatic polyols (mainly adipates) with terminal OH groups are prepared by reacting dicarboxylic acids with an excess of diols, triols, and mixtures thereof.

[0060] Renewable polyols according to the present invention include castor oil, sunflower oil, palm kernel oil, palm oil, rapeseed oil, soybean oil, corn oil, peanut oil, olive oil, algae oil, and mixtures thereof.

[0061] Examples of multifunctional polyols include, but are not limited to, graft polyols or polyurea-modified polyols. Graft polyols include triols in which vinyl monomers are graft copolymerized. Suitable vinyl monomers include, for example, styrene or acrylonitrile. Polyurea-modified polyols are polyols containing polyurea dispersions formed by the reaction of diamines and diisocyanates in the presence of a polyol. Another polyurea-modified polyol is polyisocyanate-multiaddition (PIPA) polyol, which is formed by the in-situ reaction of isocyanates and alkanolamines in a polyol.

[0062] Polyfunctional amines for use in the present disclosure may include polyether polyamines or polyester polyamines.

[0063] In a preferred embodiment, the compound having a reactive group on at least one terminal isocyanate group is a polyether polyol.

[0064] Advantageously, the reaction composition provides a polyurethane, which may also be a thermoplastic polyurethane, which may be provided by one skilled in the art.

[0065] Preferably, the polymerizable reaction composition is an optionally prepolymerized resin selected from the group consisting of epoxy resins, polyimide resins, phenolic resins, bismaleimide resins, cyanoacrylate resins, and mixtures thereof. Advantageously, the resin is an epoxy resin, optionally prepolymerized. According to an advantageous embodiment, the (prepolymerized) resin is formed on a composite structure comprising a reinforcing material selected from the group consisting of carbon fibers, glass fibers, aramid fibers, and combinations thereof.

[0066] Thus, a "prepreg" structure may be constructed from a peelable film according to the present invention, which film can then be removed when the "prepreg" structure is fully polymerized.

[0067] Preferably, the composition is polymerized and the surface roughness of the first surface of the substrate is transferred to the surface of the polymerized composition.

[0068] This means that when the polymerized composition is obtained, the surface roughness of the substrate and the thin film will match, forming a substantially equivalent roughness on the polymerized composition.

[0069] Advantageously, after removing the thin film from the polymerization reaction composition, the gloss of the polymerization composition is retained, preferably in the form of a coating.

[0070] This allows the composition to be used, for example, as a coating on another substrate, or in the case of a resin, it may be part of a prepreg structure.

[0071] Advantageously, the (reactive) composition is applied by coating, flow, spraying, milling or printing (if a coating is applied), or by gaseous means.

[0072] According to a more preferred embodiment, the peelable film has a lifespan corresponding to at least two uses, preferably at least five uses, preferably at least eight uses as a support film, where the surface energy and / or peel strength of the film is maintained during repeated uses, each use corresponding to the application of a separate additional (reactive) composition to the second side of the thin film.

[0073] Further embodiments of the film according to the invention are set forth in the appended claims.

[0074] The present invention also relates to a method for producing a peelable film that acts as a temporary support and is arranged to allow polymerization of a reaction composition that includes a compound that includes at least one isocyanate end group and a compound that has a group that is reactive with the isocyanate end group, The manufacturing method includes: a. Providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; b. Providing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; c. rolling a substrate having a first surface and having a predetermined gloss and / or a predetermined surface roughness in a coating cell equipped with atmospheric pressure plasma, preferably in a roll-to-roll apparatus; d. optionally exposing the first surface of the substrate to low temperature plasma deposition, preferably using a dielectric barrier discharge (DBD), in an atmospheric pressure chamber in the presence of the precursor and in a gas atmosphere consisting of the plasma-forming gas, for a time period between 200 milliseconds and 2500 milliseconds; e. a SiC substrate having a first and second surface; x O y forming and depositing said thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least 2 and y is at least 0.5; f. recovering the peelable thin film; the thin film has a peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm; the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the surface of the substrate; and optionally, the substrate and thin film are arranged to allow transfer of roughness from the first side of the substrate to the surface of the polymerized composition.

[0075] All features given above for the peelable film also apply to all possible combinations of the methods and embodiments.

[0076] Further embodiments of the method according to the invention are set forth in the accompanying claims.

[0077] The present invention further relates to a multi-film system, The multi-film system comprises: a polymerizable reaction composition optionally comprising a compound comprising at least one isocyanate terminal group and a compound having a group reactive with said at least one isocyanate terminal group, or an optionally prepolymerized resin; a peelable film that acts as a temporary support for the composition; The peelable film is a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, the substrate being selected from the group consisting of a plastic material or a metal compound; SiC x O y a thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, the thin film having a first side and a second side, the first side of the thin film adhering to the first side of the substrate and the second side of the thin film in contact with the polymerizable reactive composition; the thin film has a peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm; the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the surface of the substrate; and optionally the substrate and the thin film are arranged to allow transfer of roughness from the first side of the substrate to the surface of the polymerizable composition.

[0078] Again, all properties described above for the methods and films of the present invention apply to multi-film systems, including all possible combinations of properties.

[0079] Further embodiments of the multi-film system are set forth in the accompanying claims.

[0080] The present invention also relates to a prepreg type article or multi-film or system made of a film according to the invention. A prepreg structure can thus exemplify this embodiment.

[0081] The present invention also relates to a prepreg-type article comprising a first side and a second side, each of said first side and second side comprising a film according to the present invention.

[0082] Advantageously, the peel strength of the second side of the thin film covering the first side of the prepreg article has a lower peel strength than the peel strength of the other thin film covering the second side of said prepreg article.

[0083] Further embodiments of the molded article or mulch film according to the invention are set forth in the accompanying claims.

[0084] The present invention also relates in additional embodiments to a peelable film that acts as a temporary support and is arranged to allow deposition thereon of a metal film that allows the formation of a hologram, comprising: The peelable film is a substrate having a first surface, the substrate being selected from the group consisting of a plastic material or a metal compound; SiC x O y a thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, said thin film having a first side and a second side, said first side of said thin film attached to said first side of said substrate and said second side of said thin film positioned to receive said polymerizable reactive composition; The thin film is characterized in that it has an adjustable peel strength to the substrate of more than 20 N / 25 mm, preferably more than 22 N / 25 mm, more preferably more than 23 N / 25 mm, advantageously less than 30 N / 25 mm, particularly advantageously between 22 and 29 N / 25 mm.

[0085] Thus, the peelable film of the present invention functions as a support, i.e., a base support, for the mulch film system. That is, the second surface of the thin film is ready to receive the metal thin film. This is particularly advantageous for users, as the film, i.e., the peelable film and the metal thin film, do not separate during or after application. This allows for easy handling depending on the application. For example, the mulch film product can be precisely cut. Finally, the peelable film can also be easily peeled off without damaging the surface of the composition, which gives the film of the present invention many diverse uses.

[0086] By controlling the adhesive energy provided by the peel strength, it is possible to provide a peelable film with sufficient adhesive strength to handle and cut without separating the films when used as a support for a multi-film product. However, the adhesive level is low enough that the support film can be peeled off without damaging the molding material or leaving any residue. The peelable film of the present invention can generally be peeled off by hand once the final product is obtained, meaning that additional films can be added. When the product is finally used, the peelable film of the present invention can be removed. In addition, the limited silicone content in the film of the present invention prevents transfer to the composition (the material applied to the second side of the thin film).

[0087] In this case, the composition is not necessarily reactive. The composition can be deposited as a metal film by gas means, preferably chemical vapor deposition or evaporation, or can be applied by liquid means. Those skilled in the art will know how to apply the composition to provide a metal film on the peelable film of the present invention.

[0088] Advantageously, the peel strength of the second side of the thin layer of the film according to the invention to a metal film, measured according to the FINAT10 (FTM10) standard using Tesa® 7475 adhesive, is less than 5 N / 25 mm, preferably less than 4 N / 25 mm, more preferably less than 3 N / 25 mm, even more preferably less than 1 N / 25 mm, advantageously less than 0.5 N / 25 mm, and more advantageously less than 0.05 N / 25 mm.

[0089] More preferably, the metal film is deposited on a substrate, such as PET, and then transferred from the PET to the embossing varnish, thereby obtaining the hologram. Preferably, the support provided by the peelable film is effectively secured over time during and after application of the composition, preferably a polymerizable composition.

[0090] Preferably, the thin film has a thickness of 6 nm or less, preferably 5 nm or less, more preferably 3 nm or less, and the thin film has a surface energy of 20 to 30 mN / m, preferably 25 to 30 mN / m.

[0091] Preferably, the noble gas is selected from argon, helium, and mixtures thereof.

[0092] More preferably, the substrate consists of a polymeric material, preferably a biaxially oriented polymeric material.

[0093] More preferably, the substrate consists of a polymeric material, preferably a biaxially oriented polymeric material.

[0094] Advantageously, the substrate is a film made of polyester, polyimide, polyamide, polyetherketone and derivatives thereof.

[0095] More preferably, the substrate is coextruded and / or biaxially oriented.

[0096] Preferably, the substrate is a film made of a material selected from the group consisting of polyethylene terephthalate (PET), polyimide, polyamide, poly(ethylene naphthalate) (PEN), polyether ether ketone (PEEK), and derivatives thereof, and therefore these materials can be preferably coextruded to be oriented in two directions.

[0097] Preferably, PET is selected.

[0098] Advantageously, the film according to this additional embodiment comprises: providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; preparing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; rolling the substrate having a first surface in a coating cell equipped with a plasma, preferably in a roll-to-roll apparatus; exposing the first side of the substrate to low-temperature plasma deposition, preferably in an atmospheric pressure chamber with a dielectric barrier discharge (DBD) and in the presence of a gas atmosphere consisting of the plasma gas, in the presence of the precursor for applying plasma polymerization; forming and depositing the thin film on the first surface of the substrate, the thin film comprising SiC x O y and forming said thin film comprising at least one compound consisting of: H and at least one SiCH functional group, where x is at least 2 and y is at least 0.5.

[0099] Advantageously, the total amount of plasma gas is 45 to 80 m for a useful membrane width of 2 m. 3 / hour, preferably 45-75m 3 / hr flow rate.

[0100] Advantageously, the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. Particularly advantageously, the substrate feed speed is related to a specific total amount of injected plasma gas.

[0101] More advantageously, the precursor is injected at a flow rate of between 50 and 200 g / hr, preferably between 50 and 150 g / hr, and more preferably between 75 and 115 g / hr for a useful film width of 2 m. Preferably, the substrate feed rate is between 9 and 70 m / min, preferably between 9 and 65 m / min, and more preferably between 40 and 65 m / min. These two flow rate and feed rate parameters can be combined.

[0102] According to an advantageous embodiment, the method further comprises, after forming the thin film, chemically vapor depositing a metal film on the thin film.

[0103] According to a preferred configuration, the peelable film has a lifespan corresponding to at least two uses as a support film, preferably at least five uses, preferably at least eight uses, and the surface energy and / or peel strength of the film is maintained during repeated uses, each use corresponding to the application of a new, separate metal film by chemical vapor deposition onto the second side of the thin film.

[0104] An additional embodiment according to the present invention also relates to a method for manufacturing a peelable film acting as a temporary support arranged to allow deposition of a metal film, comprising the steps of: The manufacturing method includes: a. Providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; b. Providing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; c. rolling the substrate in a coating cell equipped with atmospheric pressure plasma, preferably in a roll-to-roll apparatus; d. exposing the first surface of the substrate to low temperature plasma deposition in the presence of the precursor, preferably using a dielectric barrier discharge (DBD), in an atmospheric pressure chamber in the presence of a gas atmosphere consisting of the plasma gas; e. a SiC substrate having a first and second surface; x O y forming and depositing said thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least 2 and y is at least 0.5; f. recovering the peelable film; 10. A method for producing a thin film, characterized in that the thin film has an adjustable peel strength to the substrate of more than 20 N / 25 mm, preferably more than 22 N / 25 mm, more preferably more than 23 N / 25 mm, advantageously less than 30 N / 25 mm, particularly advantageously between 22 and 29 N / 25 mm.

[0105] Particularly advantageously, the exposure of the first side of the substrate is carried out for a time period of between 50 and 2500 milliseconds.

[0106] According to certain embodiments, the exposure is carried out by maintaining the plasma chamber and / or the substrate at a temperature of less than 100° C. within the chamber at atmospheric pressure.

[0107] According to a preferred embodiment, the cyclic siloxane is selected from the group consisting of hexamethylcyclotrisiloxane (D3), octamethylcyclopentasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), vinyl 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane and mixtures thereof.

[0108] The linear siloxane is preferably selected from compounds having the following structure: [SiO(CH3)2]n, where n is at least 2.

[0109] More preferably, the linear siloxane is selected from the group consisting of hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, dodecamethylpentasiloxane, and 1,1,3,3-tetramethyl-1,3-divinyldisiloxane.

[0110] Advantageously, the total amount of plasma gas is 45 to 80 m for a useful membrane width of 2 m. 3 / hour, preferably 45-75m 3 / hr flow rate.

[0111] Advantageously, the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. Particularly advantageously, the substrate feed speed is associated with a specific total amount of injected plasma gas.

[0112] More advantageously, the precursor is injected at a flow rate of between 50 and 200 g / h, preferably between 50 and 150 g / h, more preferably between 75 and 115 g / h for a useful film width of 2 m, and preferably the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. These two flow rate and feed speed parameters can be combined.

[0113] Further embodiments of the film according to the invention are set out in the appended claims.

[0114] An additional embodiment of the peelable film according to the present invention also relates to a multi-film system, said multi-film system comprising: A metal film, a peelable film that acts as a temporary support for depositing the metal film; The peelable film is a substrate having a first surface, the substrate being selected from the group consisting of a plastic material or a metal compound; SiC x O y a thin film comprising at least one compound consisting of: H and at least one SiCH functional group, wherein x is at least 2 and y is at least 0.5; the thin film has a first surface and a second surface, the first surface of the thin film is attached to the first surface of the substrate, and the second surface of the thin film is in contact with the metal film; The thin film has an adjustable peel strength to the substrate of more than 20 N / 25 mm, preferably more than 22 N / 25 mm, more preferably more than 23 N / 25 mm, advantageously less than 30 N / 25 mm, particularly advantageously between 22 and 29 N / 25 mm.

[0115] Further embodiments of the method according to the invention are set out in the accompanying claims.

[0116] Furthermore, this additional embodiment also relates to an article or mulch film made from a peelable film according to this second embodiment.

[0117] All features mentioned for the additional embodiments of the film can in other words be combined with one another for the film, the film obtained by the method of the invention, the method for producing the film, the system, the molded article or the mulch film.

[0118] Further embodiments of the moulded article according to the invention are set out in the appended claims.

[0119] The present invention also relates to a molded article made from a prepreg comprising a film according to the invention (as described above), wherein the film is used as a release film.

[0120] Further embodiments of the method according to the invention are set out in the accompanying claims.

[0121] The method according to the invention requires the use of an apparatus for generating plasma, the apparatus comprising a roll-to-roll system in which the substrate moves continuously, the apparatus also comprising a reactor, a treatment cylinder (e.g., 400 mm diameter, 800 mm length) with a suitable dielectric coating, which drives the substrate to be treated under treatment electrodes, preferably at least three electrodes, at a speed selected in the range of 7 to 60 m / min; a processing chamber located above the processing cylinder and consisting of an electrode and a gas injection device, the injection device adjacent to the electrode allowing gases, i.e., passivation gas, plasma gas, precursor, carrier gas, and any dopant gas, to be injected directly in front of the electrode and onto the surface of the substrate being processed;

[0122] The plasma gas according to the present invention is preferably argon or helium.

[0123] The electrodes were heated with variable power (0.1–10 W / cm 2 ) is connected to a low frequency HV generator (usually 1 to several hundred kHz). The power density is 0.10 W / cm 2 to 10 W / cm 2 between 0.15 W / cm and 1.5 W / cm. 2 ~8W / cm 2 and more preferably 0.2 W / cm 2 ~5W / cm 2 and more preferably 0.25 W / cm 2 ~0.8W / cm 2 and more preferably 0.35 W / cm 2 ~0.7W / cm 2 and the unit area refers to the cumulative surface area of ​​the electrode.

[0124] Thus, the substrate rolling, exposure, and film formation steps can be combined with the above elements.

[0125] An extraction system within the processing chamber allows for the removal of the plasma gas and any by-products produced in the plasma that are not converted into deposits. The plasma gas generates the plasma, which is a unique feature of atmospheric pressure discharges. A carrier gas is injected along with the precursor (monomer). Dopants can be injected in small amounts with the inert gas, plasma gas, or carrier gas. The inert gas, plasma gas, and / or carrier gas can be the same or different and can be argon and / or helium.

[0126] Advantageously, an inert processing atmosphere is maintained within the processing reactor at an oxygen level of 50 ppm or less, preferably 20 ppm or less, and more preferably 10 ppm or less.

[0127] Such reactors are described, for example, in patent applications WO2016170242 and WO2019154976.

[0128] The passivation gas, plasma gas, and / or carrier gas may be the same or different and may be argon and / or helium.

[0129] Advantageously, the distance between the active surface of the electrode and the film running underneath on the treatment cylinder can be adjusted to ensure plasma stability and uniformity. For example, if the distance between the film and the active surface of the electrode is set to 1 mm, this distance is advantageously stable with a standard deviation of ±0.2 mm.

[0130] The precursor is advantageously injected directly into the discharge, maximizing its concentration between the electrodes. This is effective in enabling single-pass treatment. High precursor concentrations in the discharge typically result in the formation of powder in the plasma. This powder renders the product unusable and causes various problems in reactor maintenance. High gas velocities can shorten the residence time of precursor molecules in the plasma. This makes it possible to work with high precursor concentrations and perform single-pass deposition without powder formation.

[0131] Advantageously, the total amount of plasma gas is 45 to 80 m for a useful membrane width of 2 m. 3 / hour, preferably 45-75m 3 / hr flow rate.

[0132] Advantageously, the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. Particularly advantageously, the substrate feed speed is coupled to a certain total amount of injected plasma gas.

[0133] More advantageously, the precursor is injected at a flow rate of between 50 and 200 g / h, preferably between 50 and 150 g / h, more preferably between 75 and 115 g / h for a useful film width of 2 m, and the substrate feed speed is between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min. These two flow rate and feed speed parameters can be combined.

[0134] It has been found particularly advantageous to process the polymerizable reaction composition for forming polyurethane onto a substrate (satin film - Hostaphan MT50) at a speed of 60 m / min. Even more advantageously, coating of the polymerizable reaction composition for forming polyurethane onto a substrate (ultramatt film - Hostaphan XMTK) is carried out at a speed of 15 m / min. The film feed speed is thus adapted depending on the envisaged requirements and properties.

[0135] The power generated by the plasma is preferably between 900 W and 2000 W, more preferably between 900 W and 1500 W, and the plasma gas is preferably argon.

[0136] When the term "resin" is used, it means, within the scope of the present invention, an optionally prepolymerized resin selected from the group consisting of epoxy resins, polyimide resins, phenolic resins, bismaleimide resins, cyanoacrylate resins, and mixtures thereof.

[0137] Advantageously, the resin is an epoxy resin for "prepreg" type systems as defined below.

[0138] The terms "prepreg", "prepreg structure" or "prepreg product" or "prepreg material" or any equivalents refer to a pre-impregnated structure consisting of a composite structure comprising a reinforcing material preferably selected from the group consisting of carbon fibers, glass fibers, aramid fibers and combinations thereof, and an optionally pre-polymerized resin selected from the group consisting of epoxy resins, polyimide resins, phenolic resins, bismaleimide resins, cyanoacrylate resins and mixtures thereof. Advantageously, the resin is a (pre-polymerized) epoxy resin.

[0139] The term "prepreg" means "pre-impregnated." In other words, a prepreg product consists of a resin that is preferably pre-polymerized (to allow for preservation / storage) and reinforcement.

[0140] The peelable film according to the invention makes it possible to protect the prepreg product until final polymerization.

[0141] In the prepreg manufacturing process, the reinforcement is generally pre-impregnated uniformly with an amount of resin that is partially polymerized, meaning that it is not fully polymerized but still exhibits some degree of polymerization. This partially polymerized state allows the material to be stored and transported without premature polymerization.

[0142] Prepreg construction is used to manufacture high performance composite parts for industries such as aerospace, automotive and sporting goods.

[0143] Thus, the peelable film of the present invention is a temporary protective film that serves to ensure proper handling during the manufacturing process of prepreg structures, prevent premature curing of resins, and facilitate the production of high-quality composite structures using prepreg materials.

[0144] In the manufacturing process of prepreg composites, release films are typically removed before final curing. Release films act as a temporary protective film during placement and handling of the prepreg material, but are designed to be easily removed before (or after) the curing process.

[0145] Generally, the prepreg manufacturing process using the film according to the present invention involves: In many cases, prepreg structures comprising films according to the present invention are laminated to form the desired composite structure, In some cases, a debubbling step (applying pressure and heat) can be included to remove air and excess resin and ensure proper consolidation of the film before final curing. Prior to final polymerization, the release film is carefully removed from the composite structure, typically to allow the resin of the prepreg material to fully cure without being hindered by the film.

[0146] For purposes of the present invention, "equivalent" means a value or parameter that is close to or equal to the value or parameter taken as a reference. This term also means that the analyzed value is approximately equal to the value or parameter taken as a reference.

[0147] The term "roughness" refers to the surface roughness and can be measured by profilometry or profilometry. This allows the determination of the Ra coefficient (the arithmetic mean of the deviations from the mean line), which indicates the average surface roughness over the measured length, i.e., the average difference between peaks and valleys. Additionally, atomic force microscopy (AFM) methods are also considered.

[0148] The expression "acting as a temporary support" advantageously means that the film according to the invention is a support from which it is predisposed to be peeled off and which therefore acts as a temporary protection for the product it covers / supports.

[0149] The term "gloss" refers to the gloss of a surface or material as determined using an instrument such as an IGT Gloss Meter G60 (ISO 2813, ASTM D2457, ASTM D523). The instrument used in the examples is an IGT G75, which complies with TAPPI standards T480 om-2009 and ISO 8254-1. This instrument uses a convergent beam and allows gloss measurements with an angle of 75° to the substrate.

[0150] A predetermined gloss or roughness means that the gloss has a constant starting value.

[0151] The term "thin film" refers to a plasma field and is well understood by those skilled in the art.

[0152] The surface energy used in this invention is calculated using contact angle measurements of two liquids (water and diiodomethane) according to the Owens, Wendt, Rabel, Kaelble (OWRK) model using a Kruss DSA25 instrument.

[0153] The peel strength is determined on the tesa® 7475 adhesive based on tests carried out according to the FTM10 standard using an AR1000 machine, preferably at 70° C. for 20 hours.

[0154] The FTM10 standard, known to those skilled in the art, is published by FINAT (Fédération Internationale des fabricants et transformateurs d'Adhesives et Thermocollants sur papiers et autres supports): -FTM10 "Quality of silicone coated substrate for self-adhesive lamination: Peel strength (300 mm per minute)".

[0155] The thickness can be derived by applying XPS techniques or by using TEM (Transmission Electron Microscope) cross-sectional imaging methods known to those skilled in the art. DETAILED DESCRIPTION OF THE INVENTION [Example]

[0156] Argon and the monomer DMCPS (D5) were used as precursors to produce several films according to the present invention. Table 1 below shows the type of PET substrate used and the feed rate applied to form the thin film on the substrate. The peel strength is reported in N / 25 mm under the "Tesa7475" column.

[0157] [Table 1]

[0158] [Table 2] Table 2 shows the surface energy values ​​obtained for various films according to Example 1. [Example]

[0159] It was confirmed that the gloss level was maintained before and after film formation (see the table below). [table] JPEG2026503217000003.jpg136133 [Example]

[0160] In Example 3, a nylon (polyamide) substrate was treated with the plasma method of the present invention to form a thin film on one side thereof to provide a peelable film (see the table below). [table] JPEG2026503217000004.jpg46136 [Example]

[0161] Example 4 relates to a polyimide (Kapton) substrate that was treated using a plasma method according to the present invention to produce a peelable film containing a thin film on one side thereof, as shown in the table below. [table] JPEG2026503217000005.jpg60155

[0162] The peel strengths (Fp) of Examples 3 and 4 are expressed relative to the values ​​of Tesa® 7475 adhesive or TESA® 50110 adhesive.

[0163] Untreated PET film with a matte surface roughness exhibits a given gloss level. After applying a thin silicone-based film to the PET, a reduction in the matte effect is observed. Also, for this type of film, the observed peel strength was 0.1 N / 25 mm. [table] JPEG2026503217000006.jpg33110

[0164] Within the scope of the present invention, singular terms such as "one" or "the" may be replaced with plural terms such as "at least two," "at least three," "several," etc.

[0165] The terms "including," "comprising," "having," or equivalent or derivative terms may be substituted for "consisting of" to define a list or exclusive alternatives, so as not to include other elements not listed in the language in which they are used.

[0166] Additionally, the term "available" or similar or derivative expressions may be substituted for "directly available."

[0167] It will be understood that the present invention is in no way limited to the embodiments described above, but that many modifications are possible without departing from the scope of the appended claims.

Claims

1. A peelable film acting as a temporary support, positioned to allow polymerization of a reaction composition comprising a compound comprising at least one isocyanate terminal group and a compound having a group reactive with said at least one isocyanate terminal group, The peelable film is a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, said substrate being selected from the group consisting of polymeric materials or metal compounds; SiC ｘ O ｙ :H and at least one SiCH ３ a thin film comprising at least one compound comprising a functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, said thin film having a first side and a second side, said first side of said thin film attached to said first side of said substrate and positioned to receive said polymerizable reaction composition on its second side; 10. A peelable film, characterized in that the thin film has an adjustable peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm, and the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the first side of the substrate, and optionally the substrate and the thin film are arranged to allow transfer of roughness from the substrate to the surface of the polymerizable composition.

2. 2. The film of claim 1, wherein the thin film has a thickness of 6 nm or less, preferably 5 nm or less, more preferably 3 nm or less, and wherein the thin film has a surface energy of 20 to 30 mN / m, preferably 25 to 30 mN / m.

3. 3. A film according to claim 1 or 2, characterized in that the peel strength of the second side of the thin film is less than 30 N / 25 mm, preferably less than 28 N / 25 mm, more preferably less than 25 N / 25 mm, even more preferably less than 15 N / 25 mm, advantageously less than 10 N / 25 mm, more advantageously less than 8 N / 25 mm, and even advantageously less than 5 N / 25 mm, measured according to the FINAT10 (FTM10) standard using Tesa® 7475 adhesive.

4. 4. The film according to claim 1, wherein the substrate is made of a polymer material, preferably a biaxially oriented polymer material, more preferably a film made of polyester, polyimide, polyamide, polyether ketone and derivatives thereof.

5. The film according to any one of claims 1 to 4, providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; preparing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; - rolling said substrate with its first side in a coating cell equipped with a plasma, preferably in a roll-to-roll apparatus; - subjecting said first side of said substrate to low-temperature plasma deposition, preferably equipped with a dielectric barrier discharge (DBD), in an atmospheric pressure chamber in the presence of a gas atmosphere consisting of said plasma gas, in the presence of said precursor for applying plasma polymerization; forming and depositing said thin film on said first surface of said substrate, said thin film comprising SiC ｘ O ｙ :H and at least one SiCH ３ and at least one compound comprising a functional group, wherein x is at least 2 and y is at least 0.

5.

6. The total amount of plasma gas is 45 to 80 m for a useful film width of 2 m. ３ / hour, preferably 45 to 75 m ３ / h, optionally at a substrate feed speed of 9 to 70 m / min, preferably 9 to 65 m / min, more preferably 40 to 65 m / min.

7. 7. A film according to claim 5 or 6, characterized in that the precursor is injected at a flow rate of between 50 and 200 g / h, preferably between 50 and 150 g / h, more preferably between 75 and 115 g / h, optionally at a substrate feed speed of between 9 and 70 m / min, preferably between 9 and 65 m / min, more preferably between 40 and 65 m / min, for a useful film width of 2 m.

8. The film of any one of claims 5 to 7, wherein the method further comprises applying a polymerizable reactive composition to the second surface of the thin film after forming the thin film.

9. 9. The film according to claim 5, wherein the polymerizable reactive composition is obtained by reacting a compound comprising at least one isocyanate terminal group with a compound having a group capable of reacting with said at least one isocyanate terminal group, or by applying an optionally prepolymerized resin.

10. 10. The film of claim 5, wherein the composition is polymerized and the surface roughness of the first surface of the substrate is transferred to the surface of the polymerized composition.

11. 11. The film of claim 10, wherein the gloss of the polymeric composition, preferably in the form of a coating, is retained after removal of the film.

12. The film according to any one of claims 5 to 11, characterized in that the reactive composition is applied by printing, coating, flowing, spraying, milling or gaseous means.

13. 13. The film of any one of claims 5 to 12, characterized in that the peelable film has a lifespan corresponding to at least 2 uses, preferably at least 5 uses, preferably at least 8 uses as a support film while maintaining the surface energy and / or peel strength of the film during repeated uses, each use corresponding to the application of a separate additional reactive composition to the second side of the thin film.

14. 1. A method for producing a peelable film that acts as a temporary support and is arranged to allow polymerization of a reaction composition comprising a compound that contains at least one isocyanate end group and a compound that has a group reactive with said isocyanate end group, comprising: The method comprises: a. providing a plasma gas selected from the group consisting of noble gases and mixtures thereof; b. Providing a volatile precursor selected from the group consisting of cyclic siloxanes, linear siloxanes, and mixtures thereof; c. rolling a substrate having a first surface and having a predetermined gloss and / or a predetermined surface roughness in a coating cell equipped with atmospheric pressure plasma, preferably in a roll-to-roll apparatus; d. exposing the first surface of the substrate to cold plasma deposition in an atmospheric pressure chamber in which a gas atmosphere consisting of the plasma gas, preferably a dielectric barrier discharge (DBD), is present, in the presence of the precursor; e. a substrate having first and second surfaces, the substrate being made of SiC; ｘ O ｙ :H and at least one SiCH ３ forming and depositing said thin film comprising at least one compound containing a functional group, wherein x is at least 2 and y is at least 0.5; f. Recovering the peelable film; 10. A method according to claim 1, wherein the thin film has a peel strength to the substrate of greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm, and wherein the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the surface of the substrate, and optionally wherein the substrate and the thin film are arranged to allow transfer of roughness from the first side of the substrate to the surface of the polymerized composition.

15. 1. A multi-film system comprising: a polymerizable reaction composition optionally comprising a compound containing at least one isocyanate terminal group and a compound having a group reactive with said at least one isocyanate terminal group, or an optionally prepolymerized resin; a peelable film that acts as a temporary support for the composition; The peelable film a substrate having a first surface with a predetermined roughness and / or a predetermined gloss, said substrate being selected from the group consisting of a plastic material or a metal compound; and a substrate thereon; SiC ｘ O ｙ :H and at least one SiCH ３ a thin film comprising at least one compound comprising a functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, the thin film having a first side and a second side, the first side of the thin film attached to the first side of the substrate and the second side of the thin film attached to the first side of the substrate; 1. A multi-film system, characterized in that the thin film has a peel strength to the substrate greater than 5 N / 25 mm, preferably greater than 10 N / 25 mm, more preferably greater than 15 N / 25 mm, and the first side of the thin film has a surface roughness and / or gloss equivalent to the surface roughness and / or gloss of the surface of the substrate, and optionally the substrate and the thin film are arranged to allow transfer of roughness from the first side of the substrate to the surface of the polymerized composition.

16. A prepreg type article or mulch film or system comprising a film according to any one of claims 1 to 13.

17. 17. A prepreg-type article according to claim 16, characterized in that the article comprises a first side and a second side each comprising said [sic].

18. a peelable film that serves as a temporary support and is arranged to allow deposition thereon of a metal film that allows the formation of a hologram; The peelable film is a substrate having a first surface, the substrate being selected from the group consisting of a plastic material or a metal compound; SiC ｘ O ｙ :H and at least one SiCH ３ a thin film comprising at least one compound comprising a functional group, wherein x is at least equal to 2 and y is at least equal to 0.5, said thin film having a first side and a second side, said first side of said thin film attached to said first side of said substrate and positioned on its second side to receive said polymerizable reaction composition; The thin film has an adjustable peel strength to the substrate of more than 20 N / 25 mm, preferably more than 22 N / 25 mm, more preferably more than 23 N / 25 mm, advantageously less than 30 N / 25 mm, particularly advantageously between 22 and 29 N / 25 mm.

19. A molded article made of a prepreg provided with the film according to any one of claims 1 to 13, wherein the film is used as a release film.

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