JP2008049493A - Laminated film, its manufacturing method, lamination method and printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated film which is constituted by forming a protective layer on a heat-resistant base material, not adhered to the heat-resistant base material even if wound into a roll form to be allowed to stand under a high temperature environment and forms high image grade printed matter even if lamination treatment is performed at a relatively low temperature. <P>SOLUTION: The laminated film comprises laminating a protective layer having a surface layer and an adhesive layer on the heat-resistant base material, wherein the adhesive layer contains an adhesive resin material and beads. The beads are composed of low density polyethylene. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a laminate film for covering the surface of a member to be protected (for example, a recording member obtained by forming an image) with a protective layer. In particular, after heat-fixing a protective layer formed on a heat-resistant substrate to a member to be protected, a laminate film capable of forming a protective layer by peeling only the heat-resistant substrate, a method for producing the laminate film, and The present invention relates to a method for laminating a printed matter using the same, and a printed matter having an image on which a laminate film is fixed.

  Printed materials obtained by the inkjet method, offset method, gravure method, electrophotographic method, etc. are coated with a laminate film on the surface on which the image is formed (image receiving media surface), thereby providing light resistance, water resistance, and gas resistance. It is widely known that the image quality is improved by improving the image fastness such as the property and the friction resistance and further increasing the glossiness and smoothness of the image surface and the maximum density of the image (for example, JP-A-2001-2001). 121609).

  Especially for recording devices that use the ink jet method, a method that prints a dye dissolved in water on a recording member with high moisture absorption due to restrictions on the printing method that ink ejects from a fine discharge port. Is widely spread. A printed matter formed by an ink jet method using a water-based ink containing a water-soluble dye generally has poor weather resistance in many cases, and laminating is effective for enhancing the fastness of the image.

  In the laminating process, the protective layer supported by the heat-resistant substrate is thermally fixed on the image surface of the printed material, and then only the heat-resistant substrate is peeled off from the protective layer to leave the protective layer on the image surface. There are a method for obtaining a finished print and a method for obtaining a finished print by leaving the heat-resistant substrate on the image surface without peeling off. Among these, the lamination method of peeling the heat-resistant substrate is not affected by the haze of the heat-resistant substrate, and thus a high-density image can be obtained.

  These laminate films often have an adhesive layer on the laminate film to prevent blocking between the adhesive layer and the previous heat-resistant substrate in contact with the adhesive layer, which occurs when stored in a roll state. A release agent is added. As the release agent, inorganic and organic fillers, polysiloxane materials, fatty acid ester materials, and the like are used. Among these, the polysiloxane-based material has an advantage that, when laminating to a recording member having a silica-based ink receiving layer, the adhesive layer can easily wrap around the silica-based ink receiving layer, resulting in an increase in the density of the printed matter. It is known.

  In order to prevent blocking, it is also widely known that a back coat layer is further provided on a surface different from the surface on which the protective layer is provided on the heat resistant substrate.

In addition, organic or inorganic beads are mixed into the adhesive layer of the laminate film to form irregularities on the surface of the adhesive layer, thereby providing an anti-blocking effect and creating a fine air gap during lamination or film processing. It is also known that the film is prevented from sticking, wrinkles, and misalignment. In addition, when the adhesive layer is made of a material having a low Tg, the material constituting the adhesive layer moves during long-term storage, the uniformity on the surface of the adhesive layer is lost, and unevenness occurs in the image after the lamination process. However, it is also known that by mixing an appropriate amount of the organic or inorganic beads, a surface property with fine and uniform irregularities can be obtained, and a good image quality can be obtained even after laminating.
JP 2001-121609 A JP 2003-231217 A

  However, the material of beads actually used has a relatively high melting point such as acrylic and high density polyethylene (for example, Japanese Patent Application Laid-Open No. 2003-231217). Laminated film using beads with a high melting point has a smooth surface property immediately after fixing because the beads do not dissolve and all or part of the shape of the particles remains when the film is laminated with heat and pressure. However, if left in a storage environment such as high temperature and humidity, the material constituting the adhesive layer moves, and the beads gradually push up the surface layer, resulting in poor image quality (glossiness, smoothness, etc.). There is a problem of becoming. In addition, when laminating is performed at such a high temperature that high-melting-point beads can be dissolved, a heat-resistant substrate constituting the laminate film (generally PET, PP, or vinyl chloride is often used) or There is a problem that the recording member shrinks and melts due to heat and deforms due to wrinkles. On the other hand, a laminate film using beads with a low melting point is gradually deformed by long-term storage and loses its anti-blocking effect or is low in the laminate film manufacturing process (such as when resin is coated and dried). There is a problem that it can be processed only at temperature.

  The present invention has been made in consideration of these circumstances, and its purpose is to perform processing at a relatively low temperature of about 110 to 125 ° C. suitable for general laminating processing while having a sufficient anti-blocking function. It is an object of the present invention to provide a laminate film in which beads are dissolved and taken into an adhesive layer to obtain a high-quality product.

  That is, the laminate film according to the present invention is a laminate film in which a protective layer having a surface layer and an adhesive layer is laminated on a heat-resistant substrate, and the adhesive layer contains an adhesive resin material and beads, The beads are low density polyethylene.

  Further, the method for producing a laminate film according to the present invention is a method for producing a laminate film in which a surface layer and an adhesive layer are sequentially laminated on a heat-resistant substrate, wherein beads comprising an adhesive resin material and low-density polyethylene are used. It has the process of coating the containing coating liquid by the coating method, and forming the contact bonding layer, It is characterized by the above-mentioned.

  Furthermore, the laminating method of the present invention is characterized in that the above laminate film is used and a protective layer is laminated on the recording member.

  Furthermore, the printed matter of the present invention is characterized in that the surface of the recording member is laminated with the laminate film.

  As described in detail above, the laminate film containing beads of low-density polyethylene in the adhesive layer of the present invention has a sufficient anti-blocking function, and the beads are not affected even when laminated at a relatively low temperature. It can be softened and dissolved and taken into the adhesive layer to obtain a high-image product.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic sectional view showing an example of an embodiment of a laminate film of the present invention.

  This laminate film is an example of the simplest layer structure, and is provided with a surface layer (B) on one surface of the heat-resistant substrate (A), and on the surface of the surface layer (B), a recording member. On the other hand, an adhesive layer (C) containing a material that can be adhered is provided, and low density polyethylene beads (D) are contained in the adhesive layer (C).

Next, each layer constituting the laminate film of the present invention will be described.
1: Heat-resistant substrate The heat-resistant substrate (A) has a self-holding property required when the laminate film is heated to the laminate film manufacturing stage or the recording member, and in some cases is bonded under pressure. Any material that can be stably maintained and can be easily peeled off when the protective layer is coated on the recording layer of the recording member, such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyphenylene sulfide, and polyether. Single layer or laminate of materials such as sulfone, polyetherketone, polypropylene, polycarbonate, polystyrene, polyamide, polyimide, polyamideimide, polyethylene, polyvinyl chloride, polyvinylidene chloride, cellulose acetate, cellulose acetate, polymethylpentene, or 2 A film, a sheet, or the like made of a material in which more than one species are mixed can be used. Moreover, what is necessary is just to let the thickness of a heat resistant base material be a thickness suitable for a lamination process, for example, the range of about 5-200 micrometers is preferable. Moreover, you may use what gave the process which improves adhesiveness, such as a corona treatment, to the surface of these heat resistant base materials, or the thing which gave the mold release process conversely.

The heat-resistant substrate is subjected to a roughening treatment such as embossing or sandblasting on the surface on which the protective layer is formed, or by laminating a resin layer containing powder particles. Also good. When the heat-resistant substrate is not roughened, the recording member having a glossy protective layer is obtained by peeling the heat-resistant substrate after the laminate film of the present invention is bonded to the recording member. can get. On the other hand, when the surface is roughened, a recording member having a protective layer such as semi-glossy, matte or silky is obtained.
2: Surface layer The surface layer (B) is a layer that becomes the outermost surface of the protective layer when the laminate film is laminated on the recording member, and imparts heat resistance to the printed matter and bends (flexibility). From the viewpoint of preventing the occurrence of blocking on the image surface laminated in various environments, it is desirable that the glass transition point (Tg) of the material constituting (B) is at least 60 ° C. or higher. Examples of this material include resin materials containing polymer substances such as acrylic resins, styrene resins, vinyl chloride resins, and vinyl acetate resins. Moreover, the layer thickness of the surface layer can be selected from 3 to 20 μm, for example.
3: Adhesive layer Adhesive layer (C) is not particularly limited as long as it is cured at room temperature, softens by heating, has fluidity, and soaks into the recording member to adhere the laminate film to the recording member. For example, acrylic resins, styrene-acrylic resins, vinyl acetate resins, vinyl chloride resins, vinyl chloride-vinyl acetate resins, styrene-butadiene resins, styrene-vinyl chloride-vinyl acetate copolymer resins, ethylene- Vinyl acetate resin, polyester resin, polyethylene resin, polyamide resin, chlorinated rubber resin, polypropylene resin, urethane resin, etc. alone or a mixture of two or more of these emulsion resins and organic A solvent-based resin can be selected.

  Since the laminate film of the present invention is laminated on the recording member using a heat roller or a thermal head as a heating means, the heating time is very short. Therefore, the adhesive layer material is softened and fluidized instantaneously in a short heating time. Thus, it is necessary to develop adhesiveness. In order to express such characteristics, a method using a low glass transition temperature (Tg) as an adhesive resin material constituting the adhesive layer, or a low molecular weight crystalline resin called wax is used as the adhesive resin. There is a method of using a mixture. Specifically, the material having a low Tg preferably has a Tg of 30 ° C. or lower. As the wax, a material exhibiting a steep melting property upon heating is preferable, and examples of such a wax include carnauba wax, paraffin wax, candelilla wax, Fischer-Tropsch wax, and synthetic polyethylene wax.

The thickness of the adhesive layer may be any suitable thickness for the laminating process, and is preferably selected from a range of about 5 to 50 μm, for example.
4: Beads The beads (D) contained in the adhesive layer (C) of the laminate film of the present invention are the adhesive layer and the adhesive layer that can be generated when the laminate film is stored in a roll and placed in a high temperature environment. For the purpose of preventing blocking between the heat-resistant substrate before one turn in contact with the substrate, it is preferable to be made of a material that is hardly deformable at an appropriately set storage environment temperature.

  Furthermore, as beads (D), if beads are contained in the adhesive layer of the laminate film, the beads are present in the adhesive layer between the recording member and the surface layer in the laminated print. As a result, the occurrence of irregular reflection on the surface of the beads and the deformation of the surface layer laminated thereon along the shape of the beads affects the image quality, gloss, etc. Since there may be a problem in a printed product in which a printed product such as an image is laminated, the printed product obtained by laminating is equivalent to a printed product obtained using a laminate film not containing beads. In order to obtain the image quality of the above, it is preferable that the bead is a material which is deformed and dissolved by heating at the time of lamination and is taken into the adhesive layer.

  Therefore, the beads contained in the laminate film of the present invention are particularly composed of a low-density polyethylene material, and only the beads or those already dispersed in an emulsion or solvent are used as the coating liquid for the adhesive layer. Add and use. The low-density polyethylene beads can be produced by a generally well-known technique.

  The bead content in the adhesive layer (C) is preferably in the range of 0.2 to 5 parts by mass with respect to 100 parts by mass of the resin material constituting the adhesive layer, and the bead content is 0.2 mass. A sufficient anti-blocking effect can be obtained by being at least part.

  Furthermore, in order to obtain a good anti-blocking effect, the adhesive layer only needs to be applied and produced in a state where the beads slightly protrude from the surface of the adhesive layer. To obtain such a state, the number average of the beads The particle size is preferably (adhesive layer thickness-5 μm) to (adhesive layer thickness + 20 μm).

  Furthermore, the shape factor of the beads is preferably in the range of 1.05 to 1.7, and the laminating process is performed at a relatively low temperature of about 120 ° C. because the beads have a shape closer to a true sphere. Since the beads are also softened and denatured uniformly, the occurrence of defective shape deformation such as unmelted portions can be suppressed, and a printed matter having a uniform surface shape can be obtained. Furthermore, beads having a shape close to a true sphere have high dispersibility in the coating solution of the adhesive layer, can suppress the occurrence of aggregation of the beads in the adhesive layer coating solution, and is excellent in a recording member after lamination processing. Image quality can be obtained.

  In addition, a back coat layer is provided on the surface opposite to the surface on which the surface layer (B) and the adhesive layer (C) are formed in the heat resistant substrate layer (A) (the lower surface in FIG. 1). May be. Examples of materials used for the backcoat layer include cellulose resins such as silicone, polyolefin, ethyl cellulose, hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate, cellulose acetate butyrate, and nitrocellulose, polyvinyl alcohol, polyvinyl acetate, and polyvinyl butyral. , Vinyl resins such as polyvinyl acetal and polyvinyl pyrrolidone, acrylic resins such as polymethyl methacrylate, polyethyl acrylate, polyacrylamide, acrylonitrile-styrene copolymer, acrylic-silicone resin, polyamide resin, polyvinyl toluene resin, Maron indene resin, polyester resin, polyester-silicone resin, polyurethane resin, silicone-modified or fluorine-modified urethane, etc. It is possible to use a resin material alone or in combination.

  In addition, a solid or liquid release agent or lubricant may be added to the back coat layer to provide heat resistant slip. The release agent or lubricant is not particularly limited, and examples thereof include various waxes such as polyethylene wax and paraffin wax, higher aliphatic alcohols, organopolysiloxanes, anionic surfactants, cationic surfactants, and amphoteric surfactants. Nonionic surfactants, fluorosurfactants, organic carboxylic acids and their derivatives, fine particles of inorganic compounds such as fluororesins, silicone resins, talc, and silica can be used.

  In particular, in order to increase the surface strength and scratch resistance of the back coat layer, among the above resin materials, the resin having adhesion to the heat resistant substrate and the slipperiness / peeling (non-adhesion) necessary for the back coat are provided. It is preferable to use a resin in which a held material (for example, silicone) is reactively bonded.

  Furthermore, in order to make the heat resistance in the back coat layer good, a resin having a reactive group among the above resin materials is added by adding polyisocyanate or the like as a cross-linking agent to cross-link it. It is preferable to use it.

  Any of the surface layer (B), the adhesive layer (C) and the back coat layer described above, or a resin material constituting a plurality of layers may be mixed with an ultraviolet absorber. Examples of such UV absorbers include non-reactive UV absorbers such as benzotriazoles, benzophenones, salicylates, substituted acrylonitriles, hindered amines, nickel chelates, etc., alone or in combination. Can be used, and mixed with an emulsion resin or an organic solvent resin material as a main component.

  Further, in order to prevent bleeding of the ultraviolet absorber and prevent the ultraviolet absorption performance from deteriorating, a polymer substance having an ultraviolet absorbing group in the molecular chain may be contained. Examples of such a resin material include those in which a reactive ultraviolet absorber and a resin as each main component are preliminarily bonded, or those that are crosslinked in a coating and drying stage for being laminated on the heat-resistant substrate (A). be able to.

  Examples of ultraviolet absorbers that can be suitably used for this purpose include 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-5 ′). -(Meth) acryloyloxyethylphenyl) -5-chloro-2H-benzotriazole, 2- (2'-hydroxy-5 '-(meth) acryloyloxypropylphenyl) -2H-benzotriazole, 2- (2'- Benzotriazole compounds such as hydroxy-5 ′-(meth) acryloyloxypropylphenyl) -5-chloro-2H-benzotriazole can be used. In addition, as a thermoplastic resin in which a compound having an ultraviolet absorbing performance is chemically bonded, a resin obtained by synthesis by a known method or a commercially available product can be used.

  The surface layer (B), the adhesive layer (C), and the back coat layer can be formed by repeating the steps of applying and drying the coating liquid prepared for each layer on the heat resistant substrate and laminating them. . As a coating method, a roll coating method, a rod bar coating method, a slot die coating method, a micro gravure coating method, a fountain method, or the like can be used.

  Each layer provided on the heat-resistant substrate may be transparent or opaque in the state provided on the heat-resistant substrate, and in a state where the image surface of the recording member is coated, Anything is acceptable.

  The laminating process using the laminate film of the present invention can be applied to various recording members, but can also be suitably applied to a printed material formed by an ink jet recording method. FIG. 2 shows a cross-sectional view of an example of a recording member obtained by laminating the laminate film on a recording member used in the ink jet recording method. An ink receiving layer (F) is coated on a substrate (E) that supports the ink receiving layer.

  The ink receiving layer (F) uses a configuration in which porous inorganic particles and a binder as necessary are mixed, and the porous inorganic particles include silica, alumina, magnesium carbonate, calcium carbonate, silica-alumina mixed crystal, silica Examples include magnesium mixed crystals. In particular, it is preferable to use silica in view of good image quality and economy.

  For a receiving layer containing silica, when a laminate film obtained by adding a polysiloxane-based antiblocking agent to the adhesive layer of the laminate film is laminated, the adhesive layer sufficiently wraps around the silica receiving layer to obtain a high image quality. .

  An example of the apparatus which performs the formation process of the laminate printed matter using the laminate film concerning this invention is shown in FIG. The apparatus shown in FIG. 3 includes an image receiving medium supply unit 1, and the inside of the apparatus in order from the front upper part to the front middle part is a film attachment part 2, a laminate film (G) attached to the film attachment part 2, a supply port 3, A supply roller pair 4 serving as a supply means, and a guide roller 5 and a fixing roller pair 6 are arranged substantially at the center, and a conveyance roller 7, a discharge roller pair 8, and a discharge port 9 are sequentially provided from a lower rear part to a lower front part. Yes. The supply roller pair 4 includes a supply lower roller 4a and a supply upper roller 4b, and the fixing roller pair 6 includes a fixing upper roller 6a and a fixing lower roller 6b. Further, the transport roller pair 7 includes a transport main roller 7a and a transport sub-roller 7b, and the discharge roller pair 8 includes a discharge upper roller 8a and a discharge lower roller 8b.

  The recording member (H) is fed from the supply port 3 in a state in which the printing screen (ink receiving layer surface) faces the adhesive layer surface of the laminate film (G) drawn out from the rolled state. Then, it passes between the fixing roller pair 6 and is heated and pressurized to 110 ° C. to 125 ° C. as necessary. After the lamination treatment, only the heat-resistant substrate is peeled off, whereby a laminate printed matter having a protective layer can be obtained.

  Next, the present invention will be described in more detail with reference to specific examples and comparative examples, but the present invention is not limited to these examples.

  Production of laminate film

-Preparation of surface layer coating film A polyethylene terephthalate film (layer thickness 25 μm) is used as a heat resistant substrate, and an ultraviolet absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.) as a surface layer on one surface of the heat resistant substrate. Was dried so as to have a dry layer thickness of 5 μm to obtain a surface layer coating film.

-Preparation of adhesive layer coating film On the surface layer of the surface layer coating film, 100 parts of Vinibrand (Vinibrand is a registered trademark) 2706C (Nisshin Chemical Industry Co., Ltd., solid content 40%) which is an acrylic emulsion as an adhesive layer, 100 parts of BiniBlan (ViniBran is a registered trademark) 2706G (Nissin Chemical Industry Co., Ltd., solid content 40%), 2 parts of a water-based surface conditioner (BYK-333, BIC Chemie Japan K.K.), and further as anti-blocking beads. An adhesive layer coating solution in which 0.5 parts of spherical low density polyethylene beads having an average particle size of 12 μm and a melting point of 107 ° C. (flow beads (flow beads are registered trademark) CL-2080, manufactured by Sumitomo Seika Co., Ltd.) is mixed. It is coated and dried by a fountain method using a doctor bar so that the dry layer thickness is 12μm, and then laminated. It was obtained Irumu.

・ Preparation of recording member (inkjet print) As a recording member, glossy paper dedicated to inkjet printers (Professional Photo Paper PR101, manufactured by Canon Inc.) and black with an inkjet printer (PIXUS (PIXUS is a registered trademark) 990i Canon Inc.) A printed matter on which a solid image was formed was obtained.

・ Preparation of Laminate Film-Applied Prints The adhesive layer surface of the laminate film produced above and the print surface of the black solid print product were overlapped, and a steel roller with a diameter of 80 mm and a rubber roller with a diameter of 50 mm heated to 120 ° C. had a load of 120 N. The laminated film was subjected to thermocompression bonding at a feed rate of 8 mm / sec so that the laminate film was on the steel roller side to obtain a laminate film-applied print.

  1.25 parts of low density polyethylene emulsion (A110, manufactured by Gifu Shellac Co., Ltd., Sc40%) having an average particle size of 10 μm and a melting point of 117 ° C. as an antiblocking bead contained in the adhesive layer (0.5 parts in terms of dry solid content) A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the coating solution mixed with was used as the adhesive layer coating solution.

(Comparative Example 1)
0.5 parts of true spherical high density polyethylene beads (flow beads (flow beads are registered trademark) HE-3040, manufactured by Sumitomo Seika Co., Ltd.) having an average particle diameter of 12 μm and a melting point of 130 ° C. as antiblocking beads to be contained in the adhesive layer A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the mixed coating solution was used as the adhesive layer coating solution.

(Comparative Example 2)
As an anti-blocking bead to be contained in the adhesive layer, an adhesive layer coating solution is prepared by mixing 0.5 parts of true spherical acrylic beads (Chemisnow (Kemisnow is a registered trademark) MX1500H, manufactured by Soken Chemical Co., Ltd.) with an average particle size of 15 μm. Except for the above, a laminate film-attached printed matter was obtained in the same manner as in Example 1.

(Comparative Example 3)
As an anti-blocking bead contained in the adhesive layer, 0.5 part of true spherical low density polyethylene beads having an average particle size of 6 μm and a melting point of 107 ° C. (Flow Beads (registered trademark) LE-1080, manufactured by Sumitomo Seika Co., Ltd.) A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the mixed coating solution was used as the adhesive layer coating solution.

(Comparative Example 4)
Anti-blocking beads contained in the adhesive layer 0.5 parts of fine powder low density polyethylene (Flocene (Flocene is a registered trademark) UF-1.5, manufactured by Sumitomo Seika Co., Ltd.) having an average particle size of 10-20 μm and a melting point of 107 ° A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the coating solution mixed with was used as the adhesive layer coating solution.

(Comparative Example 5)
0.1 parts of true spherical low density polyethylene beads (flow beads (flow beads is a registered trademark) LE-2080, manufactured by Sumitomo Seika Co., Ltd.) having an average particle size of 12 μm and a melting point of 107 ° C. as antiblocking beads to be contained in the adhesive layer A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the mixed coating solution was used as the adhesive layer coating solution.

(Comparative Example 6)
1.5 parts of true spherical low density polyethylene beads (flow beads (flow beads are registered trademark) LE-2080, manufactured by Sumitomo Seika Co., Ltd.) having an average particle size of 12 μm and a melting point of 107 ° C. as anti-blocking beads to be contained in the adhesive layer A laminate film-attached printed material was obtained in the same manner as in Example 1 except that the mixed coating solution was used as the adhesive layer coating solution.

(Evaluation test)
a) Anti-blocking evaluation In each of the examples and comparative examples, two laminate films before fixing on the protective member were cut into A4 size and overlapped so that the adhesive layer and the back coat layer were in contact with each other, and this was 20 sheets of PPC paper Applying a load of 25 kg / cm ² with the top and bottom surfaces of the laminate film sandwiched at, leave it for 10 days in an environment with a temperature of 50 ° C and a humidity of 80%. Based on the evaluation criteria, blocking between the adhesive layer and the backcoat layer was examined.

Evaluation criteria ○: No blocking.

    Δ: There is a part that is slightly blocked.

    X: Completely blocking.

b) Adhesive layer surface state evaluation after distribution environment preservation The surface state of the adhesive layer used in the anti-blocking evaluation was observed and evaluated.

Evaluation criteria ○: The width of the unevenness on the surface is very fine (within 4 mm) and spreads uniformly.

    (Triangle | delta): The width | variety of the unevenness | corrugation of the surface is fine (within 8 mm), and has spread uniformly.

X: The width of the unevenness of the surface is wide (10 mm or more) and non-uniform c) Image evaluation after laminating treatment The image properties of the printed images with the minate film prepared in the above Examples and Comparative Examples were visually observed and evaluated.

Evaluation criteria ○: The form of beads added to the adhesive layer is not visible at all.

    (Triangle | delta): The form of the bead added to the contact bonding layer can be seen slightly.

    X: The form of the beads added to the adhesive layer is clearly visible.

d) Evaluation of Glossiness after Lamination Treatment The glossiness of the printed matter-added prints produced in the above Examples and Comparative Examples was measured using a gloss checker (IG-320 type, manufactured by HORIBA).
All the evaluation results are shown in Table 1 below.

実施例１に示すように、接着層に平均粒径１２μ、融点１０７℃の真球低密度ポリエチレンビーズ０．５部を添加して作製した本発明のラミネートフィルム、及び接着層に平均粒径１０μ、融点１１７℃の低密度ポリエチレンエマルジョン１．２５部を添加して作製した本発明のラミネートフィルムは、耐ブロッキング性、接着層の表面性及び、該ラミネートフィルムを定着した印画物の画像性、光沢性は良好なものであった。

As shown in Example 1, the laminate film of the present invention prepared by adding 0.5 parts of true spherical low density polyethylene beads having an average particle size of 12 μm and a melting point of 107 ° C. to the adhesive layer, and the average particle size of 10 μm to the adhesive layer The laminate film of the present invention prepared by adding 1.25 parts of a low-density polyethylene emulsion having a melting point of 117 ° C. has a blocking resistance, a surface property of an adhesive layer, and an image property and gloss of a printed material on which the laminate film is fixed. The property was good.

  On the other hand, as shown in Comparative Example 1, a laminate film prepared by adding spherical high density polyethylene beads having a melting point of 130 ° C. higher than that of the low density polyethylene used in Example 1 is the laminate film material. Although the anti-blocking property and the surface property of the adhesive layer were good, the beads were not completely dissolved by the laminating process in the printed material on which the laminate film was fixed, and were affected by the remaining beads. The image quality and glossiness were low.

  In addition, as shown in Comparative Example 2, the laminate film prepared by adding acrylic beads having a very high melting point had good blocking resistance of the laminate film material and good surface properties of the adhesive layer. In the printed material on which the laminate film was fixed, the beads were maintained in the adhesive layer while retaining their shape completely, and the image quality and glossiness were very low due to the influence of the beads.

  In addition, as shown in Comparative Example 3, a laminate film produced by adding true spherical low density polyethylene beads having an average particle diameter of 6 μm smaller than that of the low density polyethylene used in Example 1 is the laminate film material. Blocking occurred, and large irregularities were generated on the surface of the adhesive layer, resulting in unevenness and unevenness. Further, in the printed material on which the laminate film was fixed, the beads were dissolved by the laminating process, but the image quality and glossiness were slightly lowered due to the influence of the unevenness of the adhesive layer.

  Furthermore, as shown in Comparative Example 4, a laminate film produced using finely ground polyethylene having a pulverized type and a corner as compared with polyethylene whose shape added in Example 1 is a true sphere is the laminate film. Although the blocking resistance of the material and the surface property of the adhesive layer were good, in the printed material on which the laminate film was fixed, the beads were dissolved by the lamination process, but some undissolved beads were observed. As a result, the image quality and glossiness were slightly low.

  In addition, as shown in Comparative Example 5, although it is the same material as the low density polyethylene added in Example 1, a laminate film produced by adding 0.1% less beads than in Example 1 is The laminated film material was partially blocked, and the surface of the adhesive layer was uneven, resulting in unevenness and unevenness. Further, in the printed material on which the laminate film was fixed, the beads were dissolved by the laminating process, but the image quality and glossiness were slightly lowered due to the influence of the unevenness of the adhesive layer.

It is sectional drawing which shows the structure of the laminate film of this invention. It is sectional drawing of the product which laminated the protective layer on the recording member using the laminate film of this invention. It is sectional drawing which shows the apparatus main body internal structure used as the principal part of the lamination apparatus which concerns on the Example of this invention.

Explanation of symbols

(A) Heat resistant substrate
(B) Surface layer
(C) Adhesive layer
(D) Anti-blocking beads
(E) Base material
(F) Ink receiving layer
(G) Laminate film
(H) Recording member 1 Image receiving media supply unit 2 Film mounting unit 3 Supply port 4 Supply roller 4a Supply lower roller 4b Supply upper roller 5 Guide roller 6 Fixing roller pair 6a Fixing upper roller 6b Fixing lower roller 7 Conveying roller 7a Conveying main roller 7b Conveyance sub-roller 8 Discharge roller pair 8a Discharge upper roller 8b Discharge lower roller 9 Discharge port

Claims (14)

  A laminate film in which a protective layer having a surface layer and an adhesive layer is peelably laminated on a heat-resistant substrate, used in a laminating apparatus having a fixing temperature of 110 ° C. or more and 125 ° C. or less, wherein the adhesive layer is bonded A laminate film comprising a functional resin material and beads, wherein the beads are low-density polyethylene.   The laminate film according to claim 1, wherein the content of the beads is 0.2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the adhesive resin material constituting the adhesive layer.   The laminate film according to claim 1, wherein the number average particle size of the beads is (adhesive layer thickness−5 μm) or more (adhesive layer thickness + 20 μm) or less.   The laminate film according to any one of claims 1 to 3, wherein the sphericity of the beads has a shape factor of 1.05 or more and 1.7 or less.   The adhesive resin material constituting the adhesive layer is selected from the group consisting of acrylic resins, vinyl acetate resins, vinyl chloride resins, ethylene / vinyl acetate copolymer resins, polyamide resins, polyester resins, polyurethane resins and polyolefin resins. The laminate film according to claim 1, wherein the laminate film is a polymer material.   The laminated resin film according to claim 1, wherein the adhesive resin material constituting the adhesive layer is mixed with an ultraviolet absorber.   The laminate film according to any one of claims 1 to 6, wherein the adhesive resin material constituting the adhesive layer includes a resin material having an ultraviolet absorbing group in a molecular chain.   The laminate film according to any one of claims 1 to 7, wherein the adhesive resin material constituting the surface layer is mixed with an ultraviolet absorber.   The laminate film according to any one of claims 1 to 8, wherein the adhesive resin material constituting the surface layer contains a polymer substance having an ultraviolet absorbing group in a molecular chain. .   In a method for producing a laminate film in which a surface layer and an adhesive layer are sequentially laminated on a heat-resistant substrate, a coating liquid containing an adhesive resin material and beads made of low-density polyethylene is applied by a coating method. And a method for producing a laminate film, comprising the step of forming an adhesive layer.   A laminating method using the laminate film according to claim 1 and fixing a protective layer to a recording member by heating, wherein the heating means is a heat roller. Laminating method.   A printed material, wherein the surface of the recording member is laminated with the laminate film according to claim 1.   The printed matter according to claim 12, wherein an image is formed on the recording member by an ink jet recording method.   The printed matter according to claim 12, wherein the recording member comprises a substrate and an ink receiving layer.

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