JP2008126419A - Laminated film, its manufacturing method, printed matter and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a laminated film in which a part where the protection member is not bonded to the member to be protected is peeled along a heat-resistant base material film in a state that the part not bonded remains on the heat-resistant base material film in a heat-resistant base material film peeling process without performing a trimming processing process. <P>SOLUTION: The laminated film includes a heat-resistant base material film and at least one protective layer provided on one side of the heat-resistant base material film. The protective layer includes at least one adhesive resin layer, wherein at least one layer of the layers constituting the protective layer contains a thin sheetlike material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a laminate film used for covering the surface of a member to be protected (for example, an image-formed recording medium) with a protective layer, and a method for producing the laminate film. In addition, the protective layer formed on the heat-resistant substrate film of the laminate film is heat-fixed on the member to be protected, and then the printed material formed by peeling only the heat-resistant substrate film, and the printed material It relates to a manufacturing method.

  Conventionally, a printed material obtained by laminating a surface (image surface) of a protected member on which an image is formed by inkjet, offset, gravure, electrophotography, or the like using a laminate film has been used. . It is known that image fastness such as light resistance, water resistance, gas resistance, friction resistance, scratch resistance and the like is improved by coating this printed material with a laminate film. Further, it is widely known that image quality is improved, such as improvement in glossiness and smoothness of the image surface and maximum density of the image.

  In particular, recording devices that use the inkjet method employ a method of printing dyes and pigments dissolved in water on protected members with high moisture absorption due to restrictions on the printing method that ink ejects from fine ejection openings. Is widely spread. In general, a recording medium on which an image is formed by an ink jet method using an aqueous ink containing a water-soluble dye often has poor weather resistance against light, gas, water and the like. In addition, a recording medium similarly formed using a water-soluble pigment ink has particularly low friction resistance and scratch resistance, and often causes uneven gloss. Therefore, in order to improve the weather resistance and image characteristics of the recording medium on which an image is formed by the ink jet method, it is effective to perform a laminating process.

  Various methods have been proposed as the laminating method. For example, (a) after heat-fixing the protective layer supported by the heat-resistant base film on the image surface of the recording medium on which the image is formed, only the heat-resistant base film is peeled off from the protective layer. A method for leaving a protective layer on the image surface has been proposed. In addition, a method has been proposed in which (b) a heat-resistant substrate film is left on the image surface as it is without being peeled to obtain a finished print. Among these methods, (a) the laminating method for peeling the heat-resistant substrate film is an effective method for obtaining a high-density image because there is no influence of the haze of the heat-resistant substrate film.

  For the laminating process using the laminate film as described in (a) above, a heat fixing device including a heating roller made of, for example, metal and a release roller that presses against the heating roller to form a fixing nip portion is used. . The release roller is made of a releasable material such as silicone. Then, the laminate film and the member to be protected are conveyed to the fixing nip portion and heat and pressure are applied so that the image surface of the member to be protected is in contact with the adhesive layer of the laminate film. As a result, the adhesive material cured at room temperature contained in the adhesive layer is softened by heating and soaks into the image surface of the protected member, and at this time, the adhesiveness and tackiness are exhibited and the laminating process is performed.

In such a laminating process, the protected member comes into contact with the release roller at the fixing nip portion, and the laminated film comes into contact with the heating roller. In such a state, after applying heat and pressure to the laminate film, the protective layer (adhesive layer and surface layer) of the laminate film is formed on the image surface of the protected member by peeling the heat-resistant substrate film. A laminated print is obtained. (See Patent Document 1)
JP 2001-121609 A

  However, in the laminating process as in Patent Document 1, a laminate film that covers the entire image surface of the protected member is used, and the portion of the laminate film that protrudes from the image surface is removed without contacting the image surface of the protected member. There was a need. For this reason, it has been necessary to perform a complicated process such as trimming for cutting off the protruding portion after heat fixing.

  On the other hand, a method (trimming-less) has been proposed in which such a complicated trimming process is not performed in the heat-resistant base film peeling process. As this method, the protective layer not adhered to the image surface of the member to be protected is left on the heat resistant substrate film, and only the protective layer adhered to the image surface of the member to be protected is the heat resistant substrate film. It is conceivable to peel it from the substrate. However, in such a method, along the outer peripheral edge of the image surface of the member to be protected, the adhesion portion (use portion) with the image surface in the protective layer is completely selected with respect to the non-adhesion portion (non-use portion). It was very difficult to peel off.

  This is due to the following reason. That is, heat and pressure are also applied to the unused portion of the protective layer when passing through the fixing device, and the adhesive material is melted. As a result, the molten adhesive material enters the cross section of the outer peripheral edge of the protected member image surface, and the outer peripheral edge portion of the protected member image surface is firmly bonded to the portion of the protective layer in the vicinity thereof. For this reason, when the protective layer adhered to the image surface in this state is to be peeled off from the heat resistant base film, only the protective layer surrounded by the outer peripheral edge is selected with respect to the heat resistant base film. It was difficult to make it peel. As a result, parts other than those surrounded by the outer peripheral edge are also peeled off from the heat-resistant base film at the same time, and the protective layer is finned from the outer peripheral edge of the protected member, or conversely, the end face of the protected member is torn. There was a case.

  The present invention has been made in view of the above problems, and a first object of the present invention is to provide a laminate film capable of peeling a heat-resistant base film without trimming with respect to a laminate film for providing a protective layer to a member to be protected. Is to provide. Also, a laminate capable of selectively peeling the protective layer (used portion) adhered on the image surface of the protected member from the protective layer (unused portion) not adhered on the image surface of the protected member. Is to provide a film.

Moreover, the 2nd objective of this invention is to provide the manufacturing method of said laminate film.
The third object of the present invention is to provide a method for producing a printed material obtained by laminating using the above laminate film.
Furthermore, a fourth object of the present invention is to provide a printed matter obtained by performing a laminating process using the above method.

The above problem can be solved by having the following configuration.
1. A heat-resistant substrate film, and a protective layer composed of one or more layers provided on one surface of the heat-resistant substrate film,
The protective film has a layer containing one or more adhesive resins, and at least one of the layers constituting the protective layer contains a thin plate material.

2. 2. The laminate film as described in 1 above, wherein an average thickness of the thin plate material is smaller than a thickness of a layer containing the thin plate material.
3. 3. The laminate film as described in 1 or 2 above, wherein the hardness of the thin plate material is higher than the hardness of the resin contained in the layer containing the thin plate material.

4). 4. The laminate film as described in any one of 1 to 3 above, wherein the thin plate material has a maximum diameter of 5 μm or more and 3000 μm or less.
5. The protective layer has, in order from the heat-resistant substrate film side, a surface layer, an intermediate layer containing a thin plate-like material and an adhesive resin, an adhesive layer containing an adhesive resin,
5. The laminate film as described in any one of 1 to 4 above, wherein an average thickness of the thin plate material is smaller than 1.3 times the thickness of the intermediate layer.

6). 6. A method for producing a laminate film according to any one of 1 to 5 above,
Preparing a heat resistant substrate film;
Applying a coating solution for a protective layer containing a thin plate material having a specific gravity of 1.1 or more on one surface of the heat-resistant substrate film;
Drying the coating liquid for the protective layer;
A method for producing a laminate film, comprising:

7). A step of preparing a recording film having an image formed thereon, and a laminate film according to any one of 1 to 5 having an area larger than a surface of the recording medium on which an image is formed;
A step of obtaining an overlapped body in which the entire surface of the recording medium on which the image is formed is in contact with the protective layer of the laminate film;
The superposed body is passed between a pair of rollers comprising a heated roller and an unheated roller so that the heated roller is on the laminate film side and the unheated roller is on the recording medium side, and the protective layer Adhering to the surface of the recording medium on which the image is formed,
Peeling off the part of the protective layer adhered on the recording medium and the image-formed side of the recording medium from the laminate film;
A method for producing a printed product, comprising:
8). A printed matter produced by the method for producing a printed matter according to 7 above.

  In the laminate film of the present invention, the protective layer contains an adhesive resin and a thin plate. For this reason, a load is generated in the layer due to the process of peeling the heat-resistant substrate film after the laminating process or the bending of the protective layer that occurs when the pressure of the heat roller during the lamination is applied to the outer peripheral edge of the recording medium. . When a stress is applied in the thickness direction in the protective layer in this way, the constituent material (resin material, etc.) of the protective layer around which the thin plate-like body existing on the outer peripheral edge of the image surface in the protective layer exists Cut and cause cracks in the protective layer. As a result, starting from this crack, the portion of the protective layer on the outer peripheral edge of the image surface of the recording medium is selectively broken in the thickness direction. Finally, the portion of the protective layer on the outer peripheral edge of the image surface is in a state of being broken throughout the thickness direction.

  As a result, the protective layer (used portion) bonded on the image surface of the protected member is selectively trimmed against the protective layer (unused portion) not bonded on the image surface of the protected member. Can be peeled from the heat-resistant substrate film. In addition, the end face of the protected member of the protective layer is not torn during this peeling, and the so-called fin (resin material or the like) does not remain on the outer peripheral edge of the protected member due to a crack running in the surface direction of the protective layer. .

  In addition, the printed matter produced using the laminate film of the present invention has improved image fastness such as light resistance, water resistance and gas resistance. Further, the image quality is improved, for example, the glossiness and smoothness of the image surface and the maximum density of the image are improved.

  The laminate film of the present invention contains a thin plate material in the protective layer. For this reason, after laminating on the image surface of the recording medium on which the image has been formed, when the protective layer is peeled off from the heat-resistant substrate film, only the protective layer adhered on the image surface is selectively and completely removed. Can be peeled from the heat resistant substrate film. The reason is considered as follows.

  FIG. 7 is a diagram schematically showing a state in which a laminating process is performed on the image surface of a recording medium on which an image is formed using the laminate film of the present invention. 7A shows a state in which a laminate film 13 is superposed on the image surface 12 of the recording medium 11 and passed between the nip portions of the heating roller 14 and the release roller 15 in the axial direction of the roller (recording medium). FIG. 7B is a view of the state of FIG. 7A viewed from the direction A, and FIG. 7C is a view of the state of FIG. 7B viewed from the B-B ′ direction.

  As can be seen from FIG. 7C, the recording medium 11 and the portion of the laminate film 13 superimposed on the recording medium are thicker than the other portions of the laminate film (portions where the recording medium is not superimposed). ing. Here, since the gap of the nip portion is constant in the axial direction of the roller, a higher pressure is applied to this overlapping portion than the other portion of the laminate film when pressing with the roller pair. Further, at the time of pressing, the adhesive resin contained in the protective layer 17 of the laminate film becomes a fluidized state by heat and pressure at the time of pressurization, and penetrates into the recording medium 11 through the image surface 12 of the recording medium 11. To do. As a result, the recording medium 11 and the laminate film 13 are strongly bonded. On the other hand, FIG. 8 is a diagram showing an example of a process for peeling the recording medium 11 laminated as shown in FIG. 7 and the protective layer 17 bonded to the recording medium 11 from the heat-resistant substrate film 16. It is. In this step, first, a force is applied to the recording medium 11 in the thickness direction 19. Here, FIG. 8B shows an enlarged view of the laminate film 13 (portion surrounded by an ellipse in FIG. 8A) on the outer peripheral edge of the recording medium 11 at this time.

  Here, attention is paid to the protective layer 17 on the outer peripheral edge of the recording medium 11. When a force in the thickness direction 19 is applied to the recording medium 11, first, the laminate film 13 is bent along the outer peripheral edge of the recording medium 11, and a load is generated in the protective layer 17. When a stress is applied in the thickness direction in the protective layer 17 in this way, the constituent material (resin material) of the protective layer in which the thin plate-like body 18 existing on the outer peripheral edge of the image surface in the protective layer 17 exists. Etc.) are cut, and cracks (portions represented by dotted lines in FIG. 8B) are generated (FIG. 8B).

  Here, when a force is further applied to the recording medium 11 in the thickness direction 19, the stress in the protective layer 17 has a property of concentrating on the cracked portion. For this reason, cracks spread in the thickness direction also in the adhesive resin portion in the protective layer 17 on the outer peripheral edge of the recording medium 11 starting from cracks generated around the thin plate material 18. And finally, the cut surface 20 which cut | disconnects the protective layer 17 on an outer periphery in the thickness direction arises.

  In the present invention, the protective layer bonded to the recording medium and the protective layer not bonded to the recording medium are not cracked in the protective layer on the outer peripheral edge of the recording medium through the above process. It is considered that cracks can be generated. As a result, a clear cut surface in the thickness direction can be generated on the outer peripheral edge of the recording medium. Furthermore, in the trimming-less peeling process, there is no case where fins (such as a resin material) of the protective layer come out from the outer peripheral edge of the recording medium, and conversely, the end face of the recording medium is not torn.

  In the above description, after the laminate film 13 is bonded to the recording medium 11, the laminate film 13 is fixed and a force is applied (pulled) to the recording medium 11, and the recording layer 11 and the protective layer 17 on the recording medium 11. The process of peeling is shown. However, the recording medium 11 is fixed, and the laminate film 13 is loaded (pulled) in the upward direction in the thickness direction (for example, the direction 21 in FIG. 8A). The same can be said when the protective layer 17 is peeled off.

  In the laminate film of the present invention, the heat-resistant base film may be composed of one layer or two or more layers. Moreover, the protective layer may consist of one layer or may consist of two or more layers. When the protective layer is composed of a plurality of layers, the thin plate material may be contained in only one layer or in a plurality of layers.

  Moreover, when a protective layer consists of multiple layers, the layer containing adhesive resin may consist of only one layer, or may consist of multiple layers. Furthermore, the thin plate material and the adhesive resin may be contained in one layer, or the thin plate material and the adhesive resin may be contained in different layers. When the protective layer is composed of a plurality of layers, it is sufficient that at least the layer on the recording medium side contains an adhesive resin. In addition to this, a layer containing a thin plate-like material in the protective layer and a layer containing an adhesive resin The position is not particularly limited.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiment, when the protective layer is composed of two layers, the surface layer and the adhesive layer are sequentially formed from the heat-resistant base film side. Moreover, when a protective layer consists of three layers, it is set as the surface layer, the intermediate | middle layer, and the contact bonding layer in order from the heat resistant base film side.

<First Embodiment>
FIG. 1 is a schematic cross-sectional view showing a first example of a laminate film of the present invention. The laminate film shown in FIG. 1 includes a single protective layer (B) that exhibits adhesion to a member to be protected (recording medium) by heat or pressure on one surface of the heat-resistant substrate film (A). ing. This protective layer (B) contains an adhesive resin and a thin plate material (C).
Below, each member which comprises the laminate film of this invention is demonstrated.

Heat resistant substrate film (A)
The heat resistant substrate film (A) is not particularly limited as long as it has the following properties.
・ Suitable for maintaining the required self-holding stability when laminating film is manufactured, or after laminating the laminated film on the protected member and then heating, and in some cases applying pressure Excellent pressure resistance).
A material that can be easily peeled off after the protective layer of the laminate film is coated on the image surface of the member to be protected (excellent in the peelability from the protective layer).
・ Easily transfer heat to the protective layer during lamination (excellent thermal conductivity).
Moreover, as a heat resistant base film (A), the film, sheet | seat, etc. which consist of a material which laminated | stacked the single layer or two or more layers can be used. When the heat-resistant substrate film (A) is made of a material in which two or more layers are laminated, the heat-resistant substrate film (A) is peeled off after the laminate film is laminated on the protected member. It is necessary that the layers constituting the film (A) are in close contact with each other so that the layers do not peel off.

  Examples of the heat resistant base film (A) include polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyphenylene sulfide, polyether sulfone, polyether ketone, polypropylene, polycarbonate, polystyrene, polyamide, polyimide, polyamideimide, polyethylene, poly Materials such as vinyl chloride, polyvinylidene chloride, cellulose acetate, cellulose acetate, and polymethylpentene can be used. These materials may be used alone or in combination.

  The thickness of the heat-resistant substrate film (A) may be a thickness suitable for laminating treatment, and for example, a range of about 5 to 200 μm 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 film (A), or reversely performed the mold release process.

  The heat-resistant substrate film may be subjected to a surface roughening treatment such as embossing, sandblasting, or laminating a resin layer containing powder particles on the surface on which the protective layer is formed. When the heat resistant base film is not roughened, the glossy protective layer surface can be obtained by peeling the heat resistant base film after bonding the laminate film to the member to be protected. On the other hand, when the surface is roughened, the surface of the protective layer such as semi-glossy, matte or silky is obtained.

Back coat layer Moreover, you may provide a back coat layer in the surface (upper surface (F) in FIG. 1) on the opposite side to the surface in which the protective layer (B) is formed of a heat resistant base film. . When the back coat layer is formed as a continuous film and stored in the form of a roll, blocking between the adhesive layer that can occur in a high-temperature environment and the heat-resistant substrate film before the first winding contacting the adhesive layer Can be prevented.

  Examples of materials used for the back coat layer include cellulose resins such as silicone, polyolefin, ethyl cellulose, hydroxy cellulose, hydroxypropyl cellulose, methyl cellulose, cellulose acetate butyrate, and nitrocellulose, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, and polyvinyl acetal. , Vinyl resins such as polyvinylpyrrolidone, polymethyl methacrylate, polyethyl acrylate, polyacrylamide, acrylic resins such as acrylonitrile-styrene copolymer, acrylic-silicone resin, polyvinyl toluene resin, coumarone indene resin, polyester type Resin, polyester-silicone resin, polyurethane resin, silicone-modified or fluorine-modified urethane, etc. It can be used in.

  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 backcoat layer, among the above resin materials, a resin having adhesiveness to the heat-resistant substrate film and the slipperiness / peeling (non-adhesion) required for the backcoat It is preferable to use a resin that is reactively bonded to a material (for example, silicone) having

  Furthermore, in order to improve the heat resistance in the backcoat layer, a resin having a reactive group among the above resin materials is used by adding a polyisocyanate or the like as a crosslinking agent to be crosslinked. It is preferable.

Protective layer (B)
The protective layer (B) is a layer that becomes the outermost surface by laminating the heat-resistant substrate film after laminating the laminate film to the member to be protected. The protective layer contains an adhesive resin having surface protection performance and exhibiting adhesiveness to the protected member, and a thin plate material.

<Adhesive resin>
The adhesive resin is in a fluid state when heated, pressurized, or heated and pressurized, and at least part of the adhesive resin penetrates into the protected member through the surface (image surface) on which the image of the protected member is formed. It is a material showing adhesiveness to the inside.

  As the adhesive resin, a suitable material can be selected according to the material of the member to be protected, the conditions at the time of heating and pressing, and the like. Examples of adhesive resins include acrylic resins, styrene resins, styrene-acrylic resins, vinyl acetate resins, vinyl chloride resins, vinyl chloride-vinyl acetate resins, styrene-butadiene resins, styrene-vinyl chloride A vinyl acetate copolymer resin, an ethylene-vinyl acetate resin, a polyester resin, a polyethylene resin, a polyamide resin, a chlorinated rubber resin, a polypropylene resin, a urethane resin, etc., or a mixture of two or more of these. An emulsion resin or organic solvent resin as a main component can be used. In addition, when the protective layer contains the same type of resin as the heat resistant base film as an adhesive resin, these resins are distinguished from the resin constituting the heat resistant base film in that they exhibit adhesiveness when heated and pressurized. Is done.

  The content of the adhesive resin in the entire protective layer is preferably 5% by mass or more and 80% by mass or less, more preferably 10% by mass or more and 60% by mass or less, and 15% by mass or more and 40% by mass. More preferably, it is as follows. When the content of the adhesive resin is within these ranges, the protective layer is not peeled off from the recording medium when the heat-resistant substrate film after lamination is peeled off or when the recording medium is stored for a long period of time. Surface protection.

  In particular, in order to achieve both surface protection performance and adhesiveness, the material that has surface protection performance in the coating and drying process during laminate film production moves to the heat-resistant substrate film side, and the adhesive resin moves to the image surface side of the protected member. It is preferable to use a material to be used.

The layer thickness of the protective layer can be selected from 5 to 100 μm, for example. Furthermore, the tensile hardness of the protective layer is preferably 1000 to 7000 kgf / cm ² in order to increase the crack resistance, flexibility, surface strength and fastness of the protective layer.

<Thin plate material (C)>
The thin plate material (C) represents a material having a thin plate shape in which the area of a specific surface is large and the thickness in the direction perpendicular to the surface is thin. The length of the shortest diameter portion of the specific surface having a large area is preferably 5 times or more the thickness in the direction perpendicular to the surface.

The thin plate material (C) is preferably a material having higher hardness than a resin (for example, an adhesive resin) contained in the layer containing the thin plate material (C).
The hardness includes Rockwell hardness, Mohs hardness, Vickers hardness, Brinell hardness, Shore hardness, durometer hardness, and the like, and can be measured using a hardness measuring instrument that is most suitable for the type of sheet material used.
That is, the thin plate material (C) has the following properties.

  Examples of the thin plate material (C) include synthetic resins such as polyester, acrylic, polyvinyl chloride, polypropylene, polyurethane, polycarbonate, polystyrene, vinyl chloride, polyethylene terephthalate, graphite, aluminum, silver, glass, mica (mica), Astrophyllite, plate titanium, yttria, chalcopyrite, chalcopyrite, chrysotile, clintonite, steel ball, hard chlorite, columbite, miscellaneous ore, samarsky stone, xanthophyllite, barite, nacreite, hydraurite , Water dolomite, scorodite, suzuki stone, hematite, diaspore, chinwald mica, hand rice stone, iron mica, iron barite, iron manganese barite, copper indigo, marcasite, arsenite, meteorite, beltland stone, postunjak Minerals such as stone, manganese barite, lancey ore, kyanite or levite.

  In particular, regarding mica, either natural mica or synthetic mica (artificial mica) may be used. Examples of natural mica include muscovite (mascobite), phlogopite (flocobite), biotite, roscoe mica, chrome mica, soda mica, vanadine mica, lithia mica, etc. The process may be either a dry method or a wet method. Synthetic mica includes swelling mica and non-swelling mica, and non-swelling mica includes fluorine phlogopite mica and potash tetrasilicon mica. These materials can be used alone or in combination.

  In addition, when the protective layer contains the same type of material as the adhesive resin as the thin plate material (C), the adhesive property is that these materials have a thin plate shape and are distributed in the protective layer. Distinguished from resin.

Further, these thin plate materials (C) preferably have an elastic modulus of 10,000 kgf / cm ² or more, and in particular, mica and glass are preferably used from the viewpoint of hardness.
In order to increase the smoothness of the protective layer after laminating, the thickness of the thin plate material is preferably smaller than the thickness of the protective layer containing the thin plate material.

  The content of the thin plate material (C) in the protective layer (the content of the thin plate material (C) in the entire protective layer) is preferably 0.05% by mass or more and 30% by mass or less, and 0.1% by mass. % To 10% by mass, more preferably 0.5% to 5% by mass.

  The average thickness of the thin plate material (C) is preferably from 0.1 μm to 50 μm, more preferably from 0.5 μm to 30 μm, still more preferably from 1 μm to 5 μm.

  When the thin plate material (C) has a content and a thickness within these ranges, only the protective layer on the image surface of the recording medium can be effectively peeled off after the lamination process. Further, it is possible to effectively prevent the occurrence of fining of the protective layer from the outer peripheral edge of the recording medium and the tearing of the end face of the recording medium.

The thin plate material (C) preferably has a maximum diameter of 5 μm or more and 3000 μm or less in order to maximize the trimless effect.
The average thickness of the thin plate material and the maximum diameter of the thin plate material were measured as follows. First, a photograph was taken of a thin plate-like material enlarged by an ultra-deep shape measuring microscope (manufactured by KEYENCE, trade name: VK-8500). Next, the length and thickness of each thin plate material (C) were measured using image measurement / analysis software (trade name: VK-H1W, manufactured by KEYENCE Inc.) for this photograph. At this time, the length was measured at the portion of each thin plate material (C) having the maximum length, and the thickness was the length of the portion in the direction perpendicular to the maximum length.

  The average thickness of the thin plate material (C) was an average of five points of the thickness measured as described above. Further, the maximum diameter of the thin plate material (C) was the maximum measured value among the measured lengths of the above-mentioned thin plate material (C). In order to improve the image quality of the laminated protected member, the thin plate material preferably has transparency, and the thin plate material preferably has a light refractive index of 1.4 to 1.6.

Moreover, the laminate film in which the thin plate-like material (C) is distributed also on the heat-resistant substrate film side of the protective layer (B) can be efficiently produced by producing as follows.
(1) A heat resistant base film is prepared.
(2) A protective layer coating solution containing a thin plate material having a specific gravity of 1.1 or more is applied on one surface of the heat-resistant substrate film.
(3) The protective layer coating solution is dried. At this time, a thin plate material having a specific gravity of 1.1 or more is distributed on the heat resistant base film side by drying at a predetermined speed for a predetermined time.

<Second Embodiment>
FIG. 2 is a schematic cross-sectional view showing a second embodiment of the laminate film of the present invention. This laminate film has a protective layer (B ′) composed of two layers on one surface of the heat-resistant substrate film (A). The protective layer (B ′) includes a surface layer (B-1) and an adhesive layer (B-2) containing an adhesive resin that can adhere to the protected member on the surface layer (B-1). The surface layer (B-1) contains the thin plate material (C). The heat-resistant base film (A) and the thin plate material (C) used in the second embodiment basically have the same configuration as that of the first embodiment.
The surface layer (B-1) and the adhesive layer (B-2) will be described below.

Surface layer (B-1)
The surface layer (B-1) is a layer that becomes the outermost surface of the protective layer when the laminate film is laminated on the member to be protected and then the heat-resistant base film is peeled off. It is preferable that the glass transition point (Tg) of the resin material (60% by mass or more of all materials constituting the surface layer) which is the main component of the surface layer (B-1) is at least 60 ° C. or higher. Since the glass transition point (Tg) of the resin material is 60 ° C. or higher, it is possible to impart heat resistance to the member to be protected, bendability (flexibility), and blocking on the image surface laminated in various environments. Occurrence can be prevented.

  Examples of the resin material include a resin material containing a polymer substance such as an acrylic resin and a vinyl acetate resin. These materials can be used alone or in combination. Moreover, the layer thickness of the surface layer can be selected from 0.5 to 50 μm, for example.

Adhesive layer (B-2)
It is preferable that an adhesive layer (B-2) contains adhesive resin as a main component (60 mass% or more of all the materials which comprise an adhesive layer).

<Adhesive resin>
Any adhesive resin may be used as long as it has the following properties.
・ It is hardened at room temperature and softens when heated to have fluidity.
-It soaks into the protected member to act to adhere the laminate film (protective layer) to the protected member. At this time, a laminate film is laminated on the member to be protected using a heat roller or a thermal head as a heating means. For this reason, the heating time is very short, and it is necessary to be a material that softens and flows instantaneously during this slight heating time and exhibits adhesiveness.

  Examples of adhesive resins include acrylic resins, styrene-acrylic resins, vinyl acetate resins, vinyl chloride resins, vinyl chloride-vinyl acetate resins, styrene-butadiene resins, and styrene-vinyl chloride-vinyl acetate copolymers. Mainly composed of a combination resin, ethylene-vinyl acetate resin, polyester resin, polyethylene resin, polyamide resin, chlorinated rubber resin, polypropylene resin, urethane resin, or a mixture of two or more of these. An emulsion resin or an organic solvent resin can be used. In addition, when the protective layer contains the same type of resin as the heat resistant base film as an adhesive resin, these resins are distinguished from the resin constituting the heat resistant base film in that they exhibit adhesiveness when heated and pressurized. Is done.

  In order to obtain better penetration into the protected member, a low molecular weight crystalline resin such as wax can be added to such an adhesive resin. As the wax, a material that exhibits a sharp melting property upon heating is preferable. Examples of such wax include carnauba wax, paraffin wax, microcrystalline wax, candelilla wax, Fischer-Tropsch wax, and synthetic polyethylene wax. The addition amount of these resins is preferably 0.1 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the adhesive resin.

  In addition, the thickness of the adhesive layer (B-2) is not particularly limited, and is preferably selected as appropriate depending on the surface state of the member to be protected, for example, from a range of about 5 to 30 μm.

In addition, assuming that the laminate film is stored as a roll after being formed as a continuous film, it may be difficult to deform at the storage environment temperature, and beads may be mixed so that irregularities can be formed on the surface of the adhesive layer. good. This bead can prevent blocking between the adhesive layer that may occur when placed in a high-temperature environment and the heat-resistant substrate film before the winding that is in contact with the adhesive layer. The number average particle size of the beads is preferably (adhesive layer thickness × 0.5) or more and (adhesive layer thickness × 2) or less, and (adhesive layer thickness × 0.8) or more. , (Layer thickness of adhesive layer × 1.4) or less is more preferable.
Examples of such a bead material include acrylic, polyethylene, glass, silica, and alumina.

<Third Embodiment>
FIG. 3 is a schematic cross-sectional view showing a third embodiment of the laminate film of the present invention. This laminate film has two protective layers (B ″) on one surface of the heat-resistant substrate film (A). As the protective layer (B ″), the surface layer (B−) 1) and an adhesive layer (B-2) containing an adhesive resin capable of adhering to the protected member on the surface layer (B-1), and a thin plate in the adhesive layer (B-2) The material (C) is contained (FIG. 3 (a)).

  This laminated film is basically the same as the second embodiment except that the thin plate material (C) is not contained in the surface layer (B-1) but in the adhesive layer (B-2). It has a configuration (FIG. 3A). The laminate film of this embodiment can have the same effects as the laminate film of the first embodiment.

  Various changes can be added to the laminate film of this embodiment as long as the effects of the present invention are not impaired. For example, the protective layer B ″ is not limited to the one containing the thin plate material (C) only in the adhesive layer (B-2), and both the adhesive layer (B-2) and the surface layer (B-1). The layer (1) may contain a thin plate material (C) (FIG. 3B). The laminated film using the protective layer having such a configuration can obtain the above-described effects more reliably.

<Fourth Embodiment>
FIG. 4 is a schematic cross-sectional view showing still another example of the configuration of the laminate film. This laminate film has three layers as a protective layer (B ′ ″) on one surface of the heat-resistant base film (A). These layers contain a surface layer (B-1), a thin plate material (C) and an intermediate layer (B-3) containing an adhesive resin, and an adhesive resin in this order from the heat-resistant substrate film (A) side. It consists of an adhesive layer (B-2). The heat-resistant substrate film (A), surface layer (B-1), and adhesive layer (B-2) used in the fourth embodiment are basically the same as those in the first and second embodiments. It has a configuration. The description regarding the intermediate layer (B-3) is described below.

Intermediate layer (B-3)
The intermediate layer (B-3) is a layer containing a thin plate material (C) and an adhesive resin and is laminated between the surface layer (B-1) and the adhesive layer (B-2). This leads to the effect of increasing the smoothness of the laminate surface later.

<Adhesive resin>
Examples of the adhesive resin contained in the intermediate layer include 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 resin, ethylene-vinyl acetate resin, polyester resin, polyethylene resin, polyamide resin, chlorinated rubber resin, polypropylene resin, urethane resin, etc. alone or in combination of two or more of these An emulsion-based resin or an organic solvent-based resin having a mixture of the above as a main component can be used.

<Thin plate material (C)>
The thin plate material (C) used in the fourth embodiment basically has the same configuration as that of the first to third embodiments. However, in this embodiment, since the thin plate material is contained in the intermediate layer, the thickness of the thin plate material may be slightly larger than the thickness of the intermediate layer. The thickness of the thin plate-like material is preferably a thickness that can be used without lowering the smoothness of the laminated surface after the lamination treatment, and specifically, is preferably smaller than 1.3 times the thickness of the intermediate layer.

  As described above, in the first to fourth embodiments described above, one of a surface layer (B-1), an adhesive layer (B-2), an intermediate layer (B-3), a backcoat layer, or a plurality of layers Further, an ultraviolet absorber may be mixed. 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. And mixed with an emulsion resin or an organic solvent resin material as a main component.

  Moreover, 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. As such a material, a reactive ultraviolet absorber and a resin as a main component are preliminarily bonded together, or crosslinked at the coating and drying stage when a layer is formed on the heat resistant substrate film (A). Things can be mentioned.

  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 ultraviolet absorption performance is chemically bonded, a resin obtained by synthesis by a known method or a commercially available product can be used.

Further, in the first to fourth embodiments, the surface layer (B-1), the adhesive layer (B-2), the intermediate layer (B-3), and the backcoat layer are heat resistant coating solutions prepared for each layer. It can form by repeating the process of apply | coating and drying sequentially on an adhesive base film, and laminating | stacking. 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.
In addition, each layer provided on the heat resistant base film should just be a transparent film in the state coat | covered on the image surface of the to-be-protected member.

  The laminating process using the laminate film of the present invention can be applied to various members to be protected, but can be suitably applied particularly to a recording medium on which an image is formed by an ink jet recording method.

(Printed matter)
The laminate film of the present invention is formed by coating (laminating) a protective layer on a protected member (recording medium) on which an image is formed. For this printed matter, a laminate film having an area larger than the image surface of the recording medium is prepared, and the laminate treatment is performed so that, for example, the protective layer of the laminate film of the first to fourth embodiments is in contact with the entire image surface. It is formed by doing. After this laminating process, the heat-resistant substrate film is peeled off from the protected member. Therefore, the protective layer is finally coated on the image surface of the member to be protected.

  For example, when a recording medium in which an ink receiving layer (E) is provided on a base material (D) is used as a member to be protected, when the laminate film of the first embodiment is used, the printed matter is in turn the base material (D), The ink receiving layer (E) and the protective layer (B) are constituted. When the laminate films of the second and third embodiments are used, the print is composed of a base material (D), an ink receiving layer (E), an adhesive layer (B-2), and a surface layer (B-1) in this order. Will be. In addition, when the laminate film of the fourth embodiment is used, the printed material is a base material (D), an ink receiving layer (E), an adhesive layer (B-2), an intermediate layer (B-3), and a surface layer in this order. (B-1).

  FIG. 5 shows a cross-sectional view of an example of a protected member obtained by laminating a laminated film on a protected member used in the ink jet recording method. In this protected member, the ink receiving layer (E) is applied on the substrate (D). An adhesive layer (B-2) and a surface layer (B-1) are sequentially provided on the image surface (E-1) on which the image of the ink receiving layer (E) is formed. The image provided on the ink receiving layer is protected by covering (laminating) the adhesive layer (B-2) and the surface layer (B-1).

  As the substrate (E), paper or a plastic sheet can be used. Examples of the paper include paper materials such as high-quality paper, coated paper, baryta paper, and laminate paper, and examples of the plastic sheet include plastic sheets such as polyethylene, polyethylene terephthalate (PET), and polyvinyl chloride.

  For the ink receiving layer (E), a material in which porous inorganic particles are mixed with a binder as necessary can be used. Examples of the porous inorganic particles include silica, alumina, magnesium carbonate, calcium carbonate, silica-alumina mixed crystal, and silica-magnesium mixed crystal. In particular, silica and alumina are preferably used from the viewpoint of good image quality and economy. When an ink receiving layer containing silica is laminated using a laminate film in which a polysiloxane antiblocking agent is added to the adhesive layer, the constituent material of the adhesive layer sufficiently wraps around the ink receiving layer, resulting in high image quality. Obtainable.

(Method for producing printed matter)
The printed matter of the present invention can be produced by the following steps.
(1) A step of preparing a recording medium on which an image is formed and a laminate film having an area larger than the surface on which the image of the recording medium is formed.
(2) A step of obtaining an overlapped body in which the entire surface on which the image of the recording medium is formed is in contact with the protective layer of the laminate film (all parts of the image surface of the recording medium are the protective layer of the laminated film) And a step of overlapping so that the protective layer protrudes from at least a part of the outer peripheral edge of the image surface to obtain an overlapped body).
(3) The superposed body is passed between a pair of rollers consisting of a heated roller and an unheated roller so that the heated roller side is the laminate film and the unheated roller side is the recording medium, and the protective layer is passed through. A process of adhering to the image-formed surface of the recording medium (the recording medium is passed between a pair of rollers so that the heated roller is in contact with the heat-resistant base film of the laminate film and the unheated roller is in contact with the heated roller. Then, the adhesive resin in the protective layer is made into a fluidized state by high-temperature and high-pressure treatment when the roller pair passes, and at least a part of the adhesive resin is infiltrated into the recording medium through the image surface of the recording medium for protection. Adhere the layer to the recording medium).
(4) A step of peeling off the recording medium and the portion of the protective layer adhered to the surface on which the image of the recording medium is formed from the heat-resistant substrate film (the protective layer adhered to the surface on which the recording medium and the image of the recording medium are formed) Step of selectively removing only the part of (2) from the other part (the part of the heat-resistant substrate film and the protective layer not adhered on the surface on which the image of the recording medium is formed).

FIG. 6 shows an example of an apparatus for performing a print production process using the laminate film of the present invention. The apparatus shown in FIG. 6 includes an image receiving medium supply unit 1 so that the recording medium (H) can be supplied so as to be parallel to the direction of transport of the laminate film (G) during the transport of the laminate film (G). It has become. Further, the inside of the apparatus is composed of the following members from the front upper part to the lower part.
・ Laminate film (G) attached to film attachment part 2 and film attachment part 2
・ Supply port 3
Supply roller pair 4 (supply upper roller 4a and supply lower roller 4b)
Guide roller 5 and fixing roller pair 6 (fixing upper roller 6a and fixing lower roller 6b)
-Conveying roller pair 7 (conveying main roller 7a and conveying sub-roller 7b)
-Discharge roller pair 8 (discharge upper roller 8a and discharge lower roller 8b)
・ Discharge port 9
In this apparatus, first, the laminate film (G) is drawn out and conveyed from the state wound up in a roll shape. Then, the member to be protected (H) is supplied by the supply roller pair 4 so that the protective layer of the laminate film (G) and the image surface of the member to be protected (H) overlap each other during the conveyance of the laminate film (G). . Then, an overlapped body in which the laminate film (G) and the protected member (H) are overlapped is passed between the fixing roller pair 6. In the fixing roller pair 6, the lower fixing roller 6b is heated to 40 ° C. to 200 ° C. as necessary, and the upper fixing roller 6a is not heated. The superposed body passes through the fixing roller pair 6 and is heated and pressurized to be laminated. After this laminating treatment, only the portion of the protective layer adhered to the recording medium and the surface of the recording medium on which the image is formed is peeled off, whereby a laminate printed matter provided with the protective layer can be obtained.

In order to obtain a good printed matter, the heating temperature of the roller during lamination is preferably 40 ° C. or higher and 200 ° C. or lower, more preferably 80 ° C. or higher and 160 ° C. or lower, and 100 ° C. As mentioned above, it is still more preferable that it is 140 degrees C or less. Further, the pressure applied to the roller during the laminating process is preferably 40 N / cm ² or more and 250 N / cm ² or less, more preferably 80 N / cm ² or more and 200 N / cm ² or less, and 100 N / cm ² or less. More preferably, it is cm ² or more and 150 N / cm ² or less. Furthermore, the conveyance speed of the laminate film is preferably 0.5 mm / s or more and 100 mm / s or less, more preferably 3 mm / s or more and 50 mm / s or less, and more preferably 5 mm / s or more and 20 mm / s. More preferably, it is as follows.

Next, the present invention will be described in more detail by showing specific examples.
(Example 1)
-Production of Laminate Film A polyethylene terephthalate film (film thickness: 25 μm) was used as the heat resistant substrate film. And on one surface of the heat-resistant substrate film, as a surface layer, 100 parts by mass of an ultraviolet absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.), 50 parts by mass of MEK (methyl ethyl ketone), mica powder (mica powder) AB-25S, manufactured by Yamaguchi Mica Kogyo Kogyo Co., Ltd .: Thin plate material) The surface layer coating solution mixed with 1.5 parts by mass was applied and dried to a dry layer thickness of 5 μm to obtain a surface layer coating film.

  Furthermore, on the surface layer of this surface layer coating film, VINYBRAN 2706C (Nissin Chemical Industry Co., Ltd., solid content) which is an acrylic emulsion as a layer containing an adhesive resin (hereinafter referred to as “adhesive layer”). 40 parts by mass: Adhesive resin) 100 parts by mass, Vinyblan 2706G (Nissin Chemical Industry Co., Ltd., solid content 40% by mass: Adhesive resin) 100 parts by mass, water-based surface conditioner (BYK-333, Big Chemie, Japan Co., Ltd.) The adhesive layer coating liquid mixed with 2 parts by mass was applied and dried to a dry film thickness of 15 μm to obtain an adhesive layer coating film. Both the surface layer and the adhesive layer were applied by a fountain method using a doctor bar. Moreover, the obtained laminate film was cut out to a size of 1200 mm × 1200 mm.

-Production of protected member (inkjet recording medium) As a protected member, thick-coated paper for exclusive use of inkjet printers (LFM-CP420S, manufactured by Canon Inc.), inkjet printer (W8200 (dye ink model), manufactured by Canon Inc.) A black solid image was formed and cut out to a size of 1000 mm × 1000 mm.

-Preparation of printed matter provided with laminate film The adhesive layer surface of the laminate film prepared above and the print surface of the protected member were overlapped so that their centers coincided to obtain an overlapped body. Next, a steel roller having a diameter of 80 mm and a rubber roller having a diameter of 50 mm heated to 130 ° C. are passed between a pair of rollers niped at a load of 120 N / cm ² and thermocompression bonded, and laminated on the printing surface of the protected member. A print with a film was obtained. At this time, the laminate film was on the steel roller side and the protected member was on the rubber roller side, and the feed rate was 8 mm / sec.

(Example 2)
As a member to be protected, a black solid image is formed on glossy paper for exclusive use of an inkjet printer (LFM-GP421R, manufactured by Canon Inc.) with an inkjet printer (W8200 (dye ink model), manufactured by Canon Inc.), and has a size of 1000 mm × 1000 mm. What was cut out was used. Except this, it carried out similarly to Example 1 and obtained the printed matter which provided the laminate film.

(Example 3)
A surface layer coating solution prepared by mixing and dissolving 100 parts by weight of an ultraviolet absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.) and 50 parts by weight of MEK (methyl ethyl ketone) as a surface layer on a heat-resistant substrate film is a dry layer thickness. The coating was dried to a thickness of 5 μm. Furthermore, on the surface layer of the surface layer coating film, 100 parts by mass of Viniblanc 2706C (Nissin Chemical Industry Co., Ltd., solid content 40% by mass: adhesive resin) which is an acrylic emulsion as an adhesive layer and Vinibrand 2706G (Nisshin Chemical) Industrial Co., Ltd., solid content 40% by mass: adhesive resin) 100 parts by mass, water-based surface conditioner (BYK-333, Big Chemie Japan Co., Ltd.) 2 parts by mass and mica powder (mica powder AB-25S, Yamaguchi mica) (Product of industrial place: thin plate-like material) The coating solution for the adhesive layer mixed with 4 parts by mass was applied and dried to a dry film thickness of 15 μm. Except this, it carried out similarly to Example 1, and obtained the printed matter which provided the laminate film on the printing surface of a to-be-protected member.

Example 4
A surface layer coating solution in which 100 parts by weight of an ultraviolet absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.) and 50 parts by weight of MEK (methyl ethyl ketone) is mixed as a surface layer on a heat-resistant substrate film has a dry layer thickness of 5 μm. The coating was dried so that Further, on the surface layer of the surface layer coating film, as an intermediate layer, 20 parts by mass of Delpowder 80NB (Asahi Kasei Co., Ltd .: adhesive resin), which is an acrylic resin, 80 parts by mass of MEK (methyl ethyl ketone), and mica powder (mica powder AB) (-25S, manufactured by Yamaguchi Mica Industry Co., Ltd .: thin plate-like material) The intermediate layer coating liquid mixed with 1 part by mass was coated and dried to a dry film thickness of 5 μm. Next, on the intermediate layer of the intermediate layer coating film, 100 parts by mass of Viniblanc 2706C (Nissin Chemical Industry Co., Ltd., solid content 40% by mass: adhesive resin) which is an acrylic emulsion as an adhesive layer, and Viniblanc 2706G (day Shin Chemical Industry Co., Ltd., solid content 40% by mass: adhesive resin 100 parts by mass and water-based surface conditioner (BYK-333, Big Chemie Japan Co., Ltd.) 2 parts by mass The coating was dried to a dry film thickness of 15 μm. Except this, it carried out similarly to Example 1 and obtained the printed matter which provided the laminate film.

(Comparative Example 1)
On the heat-resistant substrate film, only a UV absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.) was applied as a surface layer and dried to a dry layer thickness of 5 μm to obtain a surface layer coating film. Further, no other layers were provided on the heat resistant substrate film. Except this, it processed like Example 1 and obtained the printed matter which provided the laminate film.

(Comparative Example 2)
On the heat-resistant substrate film, only a UV absorbing polymer (PUVA-30M, manufactured by Otsuka Chemical Co., Ltd.) was applied as a surface layer and dried to a dry layer thickness of 5 μm to obtain a surface layer coating film. Further, no other layers were provided on the heat resistant substrate film. Except this, it processed like Example 2, and obtained the printed matter which provided the laminate film.

(Evaluation test)
The prints provided with the laminate film obtained in each of the examples and comparative examples were spread on a flat table with the laminate film surface facing up. Next, do not adhere to the protected member of the laminate film, hold one of the four corners of the part protruding from the protected member (non-use part) by hand, lift it up vigorously, and base the substrate at once The film was peeled off (the heat-resistant substrate film was peeled off without trimming). And about the sample peeled in this way, the following three characteristics of a), b), and c) were evaluated.

a) Presence / absence of fins in the protective layer When the heat-resistant substrate film is peeled off, the part (used part) to be adhered to the protected member in the protective layer along the outer peripheral edge of the protected member, and the other part It was evaluated whether (unused part) was clearly and surely divided. At this time, the evaluation was performed based on the presence or absence of fins in the protective layer protruding from the outer peripheral edge of the protected member (visual observation).

Evaluation criteria ○ (no fins): no fins of the protective layer from the outer peripheral edge of the protected member × (with fins): fins of the protective layer appear from the outer peripheral edge of the protected member.

b) Whether or not the end face of the protected member is torn When the heat-resistant substrate film is peeled off, a portion (used portion) to be bonded to the protected member along the outer peripheral edge of the protected member, and It was evaluated whether other parts (non-use parts) were clearly and reliably divided. At this time, evaluation was performed based on whether or not the end face (outer peripheral edge) of the protected member was torn (visually).

Evaluation criteria ○ (no tear): The outer peripheral edge of the protected member is not torn.
X (with tear): The outer peripheral edge of the protected member is torn.

c) Laminate surface smoothness It was visually evaluated whether the surface of the printed material after the heat-resistant substrate film after the lamination treatment was peeled off was smooth.

Evaluation criteria A: Unevenness is not observed in the surface property due to the thin plate material.
○: Due to the thin plate material, almost no irregularities are observed in the surface property.
X: Unevenness is observed in the surface property due to the thin plate material.

  All the above evaluation results are shown in Table 1 below. As shown in Examples 1 to 4 in Table 1, a) the fin of the protective layer is “◯ (no fin)” in all examples, and b) the torn member is “○” in all examples. (No tear). Moreover, c) surface smoothness was "(circle)" or "(double-circle)" in all the Examples. Therefore, it can be seen that the laminate film of the present invention can provide good results when the protective layer contains a thin plate material having a higher hardness than the adhesive resin. That is, even if the heat-resistant substrate film was peeled off without trimming regardless of the type of the protected member, no fins of the protective layer protruding from the outer peripheral edge of the protected member or tearing of the end surface of the protected member were observed. . Moreover, a laminate film is obtained in which a portion (used portion) to be bonded to the protected member in the protective layer along the outer peripheral edge of the protected member and other portions (non-used portion) are clearly and surely divided. It was.

  In particular, as shown in Example 4, by containing a thin plate material in the adhesive layer and the intermediate layer, a laminate film having a smooth laminated surface after lamination treatment and no surface irregularities due to the thin plate material is obtained. I was able to get it.

  On the other hand, as shown in Comparative Examples 1 and 2, in the laminate film that does not contain the thin plate-like material, when the heat-resistant base film is peeled off without trimming, it comes out from the outer peripheral edge of the protected member. Fins in the protective layer were observed. In particular, in Comparative Example 2, tearing of the outer peripheral edge of the protected member was also observed.

It is a schematic sectional drawing which shows 1st Embodiment of the laminate film of this invention. It is a schematic sectional drawing which shows 2nd Embodiment of the laminate film of this invention. It is a schematic sectional drawing which shows 3rd Embodiment of the laminate film of this invention. It is a schematic sectional drawing which shows 4th Embodiment of the laminate film of this invention. It is a schematic sectional drawing which shows an example of the printed material which performed the lamination process with the laminate film of this invention. It is the schematic which shows an example of the manufacturing method of the printed matter of this invention. It is a figure showing the manufacturing process of the printed matter using the laminate film of this invention. It is a figure showing the manufacturing process of the printed matter using the laminate film of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image receiving medium supply part 2 Film mounting part 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 Conveying sub roller 8 Discharge roller pair 8a Discharge upper roller 8b Discharge lower roller 9 Discharge port 11 Recording medium 12 Image surface 13 Laminate film 14 Heating roller 15 Release roller 16 Heat resistant base film 17 Protective layer 18 Thin plate material 19 Thickness direction 20 Cut surface A Heat resistant base film B Protective layer B-1 Surface layer B-2 Adhesive layer B-3 Intermediate layer C High hardness thin plate material D Base material E Ink receiving layer F Laminating apparatus G Laminating film H Recording medium

Claims (8)

A heat-resistant substrate film, and a protective layer composed of one or more layers provided on one surface of the heat-resistant substrate film,
The protective film has a layer containing one or more adhesive resins, and at least one of the layers constituting the protective layer contains a thin plate material.   The laminate film according to claim 1, wherein an average thickness of the thin plate material is smaller than a thickness of a layer containing the thin plate material.   The laminate film according to claim 1 or 2, wherein the hardness of the thin plate material is higher than the hardness of the resin contained in the layer containing the thin plate material.   The laminate film according to any one of claims 1 to 3, wherein a maximum diameter of the thin plate material is 5 µm or more and 3000 µm or less. The protective layer has, in order from the heat-resistant substrate film side, a surface layer, an intermediate layer containing a thin plate-like material and an adhesive resin, an adhesive layer containing an adhesive resin,
The laminate film according to any one of claims 1 to 4, wherein an average thickness of the thin plate material is smaller than 1.3 times a thickness of the intermediate layer. A method for producing a laminate film according to any one of claims 1 to 5,
Preparing a heat resistant substrate film;
Applying a coating solution for a protective layer containing a thin plate material having a specific gravity of 1.1 or more on one surface of the heat-resistant substrate film;
Drying the coating liquid for the protective layer;
A method for producing a laminate film, comprising: A step of preparing a laminate film according to any one of claims 1 to 5 having an area larger than a recording medium on which an image is formed, and a surface of the recording medium on which an image is formed;
A step of obtaining an overlapped body in which the entire surface of the recording medium on which the image is formed is in contact with the protective layer of the laminate film;
The superposed body is passed between a pair of rollers comprising a heated roller and an unheated roller so that the heated roller is on the laminate film side and the unheated roller is on the recording medium side, and the protective layer Adhering to the surface of the recording medium on which the image is formed,
Peeling off the part of the protective layer adhered on the recording medium and the image-formed side of the recording medium from the laminate film;
A method for producing a printed product, comprising:   A printed matter produced by the method for producing a printed matter according to claim 7.

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