JPH07108770A - Transfer-type laminated film - Google Patents

Abstract

PURPOSE:To prevent an entrapment of air when a laminating layer is transferred in a transfer-type laminated film for forming the laminating layer by transferring on an image forming surface of printing paper. CONSTITUTION:In a transfer-type laminated film 10 provided with a substrate 2 having a matte surface 2s and a laminating layer 3A of a thermoplastic resin formed on the matte surface 2s of the substrate 2 to be transferred onto an image forming surface of printing paper by thermal contact bondinj, a surface 3. As of the laminating layer 3A opposite to the substrate 2 is a glossy surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminate film for forming a transparent film for surface protection on an image formed on photographic paper.

[0002]

2. Description of the Related Art Conventionally, for images formed on photographic paper, especially for images formed by a sublimation type thermal transfer method using a sublimable or heat diffusible dye, its surface protection, prevention of discoloration and fading A transparent film is laminated for imparting properties.

As a method for laminating a transparent film,
A laminate film having a base material and a laminate layer made of a thermoplastic resin formed on the base material, wherein only the laminate layer in the heated portion is transferred onto a photographic paper by partially heating and pressing the laminate film. A method of using a transferable laminated film has been proposed (JP-A-60-204397, JP-A-59-85793, JP-A-59-76298). By using such a transfer type laminating film, it is possible to prevent curling of photographic printing paper laminated with a transparent film, and it is also resistant to sebum against hand oil and contained in vinyl chloride products such as wallpaper, floor mats and table cloths. The plasticizer resistance to such plasticizers can be satisfactorily enhanced.

However, since an image formed by laminating these transparent films is usually glossy with high gloss, there is a problem that fingerprints are easily noticeable. Further, when the screen has a high gloss, there is a large amount of surface reflected light, which makes it difficult to see the screen, and particularly when the screen is large, it is difficult to see the entire surface.

Therefore, in order to solve such a problem,
A transparent film is laminated so that the image side of photographic paper is matte. As one of such laminating methods, as shown in FIG. 6, as a transfer type laminating film 1, a surface of a base material 2 is matted, and a laminating layer 3 is formed on the matted base material 2. A method of using the one formed by coating is known.
As a method of using the transfer type laminated film 1 as described above, as shown in FIG. 7, the transfer type laminated film 1 is formed on the image forming surface of the photographic printing paper 4 on which the image is formed (that is, the dye receiving layer 4a). The layers are overlapped and thermocompression-bonded by the roller 5 ((a) in the figure), and then the base material 2 is peeled ((b) in the figure).
As a result, the unevenness of the matte surface of the base material 2 becomes
The image surface of the photographic printing paper 4 is matte because it is transferred to the surface of the laminate layer 3 transferred to.

As another method for matting the image surface of the photographic paper, the surface of the photographic paper before image formation is matte-processed in advance, and a thermal transfer image is formed on the matte-processed surface. A method of laminating a transparent film on it is also known.

[0007]

However, in order to make the surface of the transparent film laminated on the image side of the printing paper matte, the laminating layer 3 of the transfer type laminating film 1 shown in FIG. 6 is matted. The surface of the base material 2 is simply the one formed by coating on the base material 2.
It has unevenness that follows the unevenness of the matte surface. Therefore, when laminating the laminating layer 3 and the photographic printing paper 4, air is entrapped, the adhesive strength between the two is lowered, and the image quality is also lowered.

On the other hand, in order to make the surface of the transparent film to be laminated on the image side of the photographic paper matte, the photographic paper is matted in advance. Because the sex is impaired,
There is a problem that uneven printing occurs.

The present invention is intended to solve the problems of the prior art as described above, and an object thereof is to make the surface of a photographic printing paper on which a transparent film is transferred into a matte shape without degrading the image quality. .

[0010]

Means for Solving the Problems The present inventor has made a surface of a laminate layer glossy in a transfer type laminate film comprising a substrate having a matte surface and a laminate layer laminated thereon. The inventors have found that the above objects can be achieved and completed the present invention.

That is, the present invention has a base material having a matte surface and a laminate layer made of a thermoplastic resin formed on the matte surface of the base material, and the laminate layer is printed by thermocompression bonding. Provided is a transfer type laminate film which is transferred onto an image forming surface of paper, wherein the surface of the laminate layer opposite to the base material is a glossy surface.

As a first method for producing such a transfer-type laminated film, a thermoplastic resin layer is formed by coating or extruding on the mat-shaped surface of a mat-shaped substrate, and then the heat Provided is a method characterized in that the surface of a plastic resin layer is made glossy by a cast roll.

As a second method for producing such a transfer type laminated film, a thermoplastic resin layer is formed on the mat-like surface of a base material having a mat-like surface by coating or extrusion, and then the heat A method is provided which comprises thermally laminating a peelable glossy film on the surface of a plastic resin layer and then peeling the peelable glossy film.

Further, as a third method for producing such a transfer type laminate film, a thermoplastic resin layer is formed by coating or extruding on a releasable substrate having a glossy surface, and then on the releasable substrate. The thermoplastic resin layer formed on the above is superposed on the mat-shaped surface of the base material having a mat-shaped surface, the both are thermally laminated, and then the peelable base material is peeled off.

The present invention will be described below in detail with reference to the drawings. In each drawing, the same reference numerals represent the same or equivalent constituent elements.

FIG. 1 is a sectional view of a transfer type laminated film 10 according to the basic embodiment of the present invention. As shown in the figure,
This transfer type laminated film 10 has a structure in which a laminate layer 3A made of a thermoplastic resin is laminated on the mat-shaped surface 2s of a base material 2 having a mat-shaped surface 2s, and this laminate layer 3A surface 3As
Is a glossy surface even though the laminate layer side surface 2s of the base material 2 is in a matte state.

Here, the base material 2 having a matte surface supports the laminating layer 3A of the transfer type laminating film 10 and, when the laminating layer 3A is transferred to photographic paper, the surface of the laminating layer 3A is matted. This layer is responsible for this function. As such a base material 2, the same base material as that used in the conventional transfer type laminate film 1 shown in FIG. 6 can be used. For example,
Examples of the constituent material of the base material include PET film and papers.

On the other hand, the laminate layer 3A is a layer which is transferred onto the image forming surface of the printing paper by thermocompression bonding, protects the surface protection of the printing paper, and has a function of improving sebum resistance and plasticizer resistance. is there. Therefore, as the resin forming the laminate layer 3A, the surface of the photographic paper can be well protected and
It is incompatible or low compatible with the base material 2 and has adhesiveness with the image forming surface of the photographic paper so that it can be easily peeled from the base material 2 and transferred to the image forming surface of the photographic paper during thermocompression bonding. It is preferable to appropriately select from high resins. As such a resin, the same resin as that used in the conventional transfer type laminated film 1 can be used, and for example, it can be formed from a vinyl chloride-vinyl acetate copolymer or the like. A water-based ink fixing layer composition for imparting writability to photographic paper (Japanese Patent Application No. 5-125445)
You may form from. Further, the laminate layer 3A has
If necessary, a UV absorber, an antioxidant and a HALS (hindered amine light stabilizer) can be contained.

The present invention is characterized in that the surface 3As of the laminate layer 3A as described above is a glossy surface. This makes it possible to prevent the entrapment of air when transferring it onto the printing paper.

The thickness of the laminating layer 3A is usually 15 to 50 μm in order to prevent entrapment of air when transferring onto the printing paper and to enhance the adhesive force to the printing paper.
It is preferable that

The transfer laminate film 10 of the present invention shown in FIG. 1 can be manufactured by various methods.
For example, it can be satisfactorily manufactured by the following first to third methods.

As a first method, as shown in FIG.
The thermoplastic resin layer 3 is laminated on the base material 2 having a matte surface by coating or extrusion (FIG. 2 (a)), and then the surface is subjected to a glossing treatment using a cast roll 6 (FIG. 2 ( b)). Thus, the thermoplastic resin layer having the glossy surface 3As on the base material 2 having a matte surface, that is,
The laminate layer 3A of the present invention is laminated to obtain the transfer type laminated film 10 of the present invention (FIG. 2 (c)).

As a second method, as shown in FIG.
Similar to FIG. 2A of the first method, after the thermoplastic resin layer 3 is laminated on the base material 2 having a matte surface by coating or extrusion (FIG. 3A), the thermoplastic resin thermal layer is formed. Three
A peelable gloss film 7 is laminated on the surface of the
(B)) Then, the peelable glossy film 7 is peeled off (FIG. 3 (c)) to obtain the transfer laminate film 10 of the present invention (FIG. 3 (d)).

As a third method, as shown in FIG.
Before laminating the thermoplastic resin layer 3 to be a laminate layer on the mat-shaped substrate 2, it is laminated on the releasable substrate 8 having the glossy surface 8s by coating or extrusion (FIG. 4 (a)). Next, the thermoplastic resin layer 3 is superposed on the base material 2 having a matte surface, and both are thermally laminated (FIG. 4B), and then the peelable base material 8 is peeled (FIG. 4).
(C)), The transfer type laminated film 10 of this invention is obtained (FIG.4 (d)).

The substrate 2 having a matt surface, which is used in the method for producing the transfer laminate film 10 of the present invention, can be obtained by various methods.
For example, the following methods (i) to (vi) can be mentioned.

(I) With respect to a base material whose surface is not matte and whose surface is not processed, the surface is matted by sandblasting.

(Ii) The base material whose surface is not processed is matted with an embossing roll.

(Iii) A resin composition having a matte surface when applied and then cured is applied onto a substrate whose surface is not processed. After that, a surface hardening treatment is performed if necessary.

(Iv) The resin composition is applied on a base material having an untreated surface, and then the surface is dissolved with a solvent to form a mat. Further, a surface hardening treatment is applied if necessary.

(V) The plastic resin composition is applied onto a base material having an untreated surface, and then the surface is heated and pressed by a roll having a matte surface.

(Vi) As the base material having a matte surface, one having a matte surface itself such as natural paper is selected. Here, as the natural paper, papers based on natural pulp, for example, medium-quality paper, high-quality paper, coated paper, glassine paper and the like can be used.

An antistatic agent is previously applied to the surface of the substrate 2 having such a matte surface before forming the laminating layer 3A thereon, and the laminating layer is applied to photographic paper. It may be possible to prevent static electricity when transferring. Alternatively, an antistatic agent may be added to the constituent material of the base material 2 in advance to prevent the static charge when the laminate layer is transferred to the printing paper.

Although the basic embodiment of the present invention has been described above, the transfer type laminate film is not limited to this basic embodiment, and the surface has a mat-like surface as a base material, and the mat-like surface of the base material. Various modes can be adopted as long as a laminate layer having a glossy surface is formed on the above.

For example, a release layer may be provided between the base material and the laminate layer in order to improve the releasability after the transfer type laminate film is thermocompression-bonded to the printing paper.

When the release layer is provided, whether the release layer and the laminate layer are peeled off at the time of peeling or whether the release layer and the substrate are peeled off depends on the adhesive force between the release layer and the laminate layer. Alternatively, it differs depending on which of the adhesive force between the release layer and the substrate is greater. Therefore, the resin forming the release layer is appropriately selected according to the position to be peeled off, the type of the laminate layer or the base material.

For example, in the case of peeling at the interface between the release layer and the laminate layer, when cellulose acetate butyrate is used as the laminate layer and vinyl chloride-vinyl acetate copolymer is used as the base material, the release layer is It can be formed from a silicone resin such as addition reaction type silicone or condensation reaction type silicone.

In the case of peeling at the interface between the release layer and the substrate, the outermost surface of the photographic printing paper after transfer is composed of the release layer. Therefore, in this case, as the release layer,
It is preferable to use one having a surface protection function.
For example, when cellulose acetate butyrate is used as the laminate layer and polyethylene is used as the base material, if the release layer is formed from polymethylmethacrylate, the release layer made of polymethylmethacrylate at the time of peeling is applied to the photographic paper together with the laminate layer. Transfer and protect the surface of photographic paper well.

The method of forming the release layer is not particularly limited, and the release layer can be formed by coating or extruding the release layer-forming resin on the substrate by a conventional method.

Further, as a further different embodiment of the transfer type laminate film of the present invention, a layer which is transferred as a layer constituting the outermost surface of the printing paper and imparts writability and stampability to the printing paper (hereinafter referred to as a stamp layer May be provided). Such a stamp layer can be formed by using, for example, a composition for an aqueous ink fixing layer (Japanese Patent Application No. 5-125445). Incidentally, this stamp layer can be provided together with the above-mentioned release layer, for example, when the stamp layer is formed from the composition for the aqueous ink fixing layer,
The release layer can be made of a silicone resin.

[0040]

The transfer-type laminate film of the present invention has the structure shown in FIG.
As shown in FIG. 6, since it is composed of the base material 2 having a matte surface and the laminate layer 3A made of a thermoplastic resin laminated on the base material 2, as in the case of the conventional transfer type laminate film shown in FIG. Layer 3A can be transferred to photographic paper. That is, as shown in FIG. 5, the laminating layer 3A of the transfer type laminating film 10 of the present invention and the image forming surface (dye demand layer 4a) of the photographic printing paper 4 are overlapped with each other, and both are thermocompression bonded by the roller 5. (Fig. (A)),
After that, the base material 2 of the transfer type laminated film 10 is peeled off, and the laminate layer 3A is transferred onto the image forming surface of the photographic printing paper 4. When the surface 2s of the base material 2 of the transfer type laminated film 10 has a mat-like unevenness, It is reflected on the surface of the laminate layer 3A transferred to the photographic printing paper 4 ((b) of the same figure). Therefore, when the image forming surface of the photographic paper is protected by the laminate layer, the surface of the photographic printing paper can be matted.

Moreover, since the surface of the laminating layer 3A of the transfer type laminated film of the present invention is a glossy surface, the laminating layer 3A can be laminated using such a commercially available inexpensive laminating machine having a low linear pressure. Layer 3A and photographic paper 4
It is possible to prevent air from being caught in between. Therefore, it is possible to prevent deterioration of image quality due to transfer of the laminate layer 3A.

[0042]

EXAMPLES The present invention will be described in detail below based on examples.

Example 1 First, the following laminate was prepared as a base material for a transfer type laminate film. Low-density polyethylene (Sumikasen L718-H) was extruded and laminated on a coated paper having a basis weight of 73 g / m ² with a thickness of 30 μm. At that time, the polyethylene surface was cast by a mat-processed roll and cooled, and the polyethylene surface was photographed. A matte surface was formed.

Next, the matte surface of this substrate was coated with the following composition (a) for forming a laminate layer to a thickness of 40 μm (dry thickness). The surface of this coating layer was a matte surface that followed the unevenness of the matte surface of the substrate.

Next, the laminate of the base material and the coating layer was passed between rolls (temperature 120 ° C.) which had been subjected to hard chrome plating and silicon peeling treatment to make the surface of the coating layer smooth and glossy. To prepare a transfer type laminated film.

[Laminate Layer Forming Composition (a)] Cellulose Acetate Butyrate 15 wt% (CAB551-0.01, Eastman Chemical Co., Ltd.) Cellulose Acetate Butyrate 3 wt% (CAB500-5, Eastman) Chemical Co., Ltd. (Takenate D11ON, Takeda Pharmaceutical Co., Ltd.) Plasticizer (Dyacizer-DBP, Mitsubishi Kasei Vinyl Co., Ltd.) 2 wt% Methyl ethyl ketone 40 wt% Toluene 40 wt% Synthetic paper (YUPO) , Oji Paper Co., Ltd.) 60 μm
/ Coated paper 60 μm / Synthetic paper (YUPO, manufactured by Oji Paper Co., Ltd.) 60 μm laminated substrate is coated with the following composition for dye receiving layer (b) at a dry thickness of 5 μm to form photographic paper. Color printer (CVP-G
7. Ink ribbon (VPM-30S manufactured by Sony Corporation)
Images were output using TA, manufactured by Sony Corporation.

[Dye Receptor Layer Composition (b)] Cellulose Acetate Butyrate 7.7 wt% (CAB500-5, Eastman Chemical Co., Ltd.) Cellulose Acetate Butyrate 7.7 wt% (CAB551-0. 01, manufactured by Eastman Chemical Co., Ltd. Silicon oil 0.8% by weight (SF8427, manufactured by Toray Dow Corning Silicone Co., Ltd.) Polyisocyanate 3.8% by weight (Takenate D110N, manufactured by Takeda Pharmaceutical Co., Ltd.) Methyl ethyl ketone 40 % By weight Toluene 40% by weight Then, the laminated layer of the above-mentioned transfer type laminating film is superposed on the image outputted on this printing paper and laminated using a laminator (IC-320, manufactured by Intercosmos Co., Ltd.). The PET film was peeled off. As a result, there was substantially no air entrapment during lamination, and the surface of the photographic paper was in a good matte state.

Example 2 Matte photographic paper for silver salt photography (Fuji Photo Film Co., Ltd.)
Made of polymethylmethacrylate (Paraloid A-1) as a release layer having a surface protection function.
1, Rohm and Haas Co., Ltd.) 10% by weight methyl ethyl ketone solution to form a layer having a dry thickness of about 3 μm, and the following composition (c) for forming a laminate layer is coated thereon to give a dry thickness. A layer of about 25 μm was formed. Then, a PET film is further laid on the surface, laminated using a laminator (IC-320, manufactured by Intercosmos Co., Ltd.), and then the PE is laminated.
The T film was peeled off to prepare a transfer type laminated film in which the surface of the laminated layer was smooth and glossy.

[Laminate Layer Forming Composition (c)] Vinyl Chloride-Vinyl Acetate Copolymer 24% by Weight (Denka Vinyl # 1000D, manufactured by Denki Kagaku Kogyo Co., Ltd.) Plasticizer (Diacizer D160) 6% by weight Methyl ethyl ketone 35% by weight Toluene 35% by weight On the other hand, an image is output on a photographic printing paper by using a color printer (UP-3000, manufactured by Sony Corporation), and the transfer type laminating film described above is superposed on the image, and a laminator ( It was laminated using IC-320, manufactured by Intercosmos Co., Ltd., and then the substrate (matte photographic paper for silver salt photography) was peeled off. As a result, there was substantially no air entrapment during lamination, and the surface of the photographic paper was in a good matte state.

Example 3 A PP film was used as a peelable substrate having a glossy surface, and the above-mentioned composition (a) for forming a laminate layer was coated on the PP film to a thickness of 30 μm (dry thickness),
Furthermore, a matte photographic printing paper for silver salt photography (manufactured by Fuji Photo Film Co., Ltd.) is superposed as a base material on this coating layer and laminated at 120 ° C., and then the PP film is peeled off from the lamination layer to form a transfer type laminated film. Was produced.

This transfer type laminate film was laminated with a printing paper on which an image was output in the same manner as in Example 2, and then the base material (matte printing paper for silver salt photography) was peeled off. As a result, there is virtually no air entrapment during lamination,
The surface of the photographic paper was in a good matte state.

[0052]

According to the transfer type laminate film of the present invention, it is possible to prevent the deterioration of the image quality due to the entrainment of air when the laminate layer is transferred onto the printing paper on which the image is formed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a transfer-type laminated film of the present invention.

FIG. 2 is an explanatory view of a method for producing a transfer type laminated film of the present invention.

FIG. 3 is an explanatory view of a method for manufacturing a transfer type laminate film of the present invention.

FIG. 4 is an explanatory view of a method for manufacturing a transfer type laminate film of the present invention.

FIG. 5 is an explanatory view of a method of transferring a laminate layer to a printing paper by using the transfer type laminate film of the present invention.

FIG. 6 is a cross-sectional view of a conventional transfer type laminated film.

FIG. 7 is an explanatory diagram of a method of transferring a laminate layer onto a printing paper using a conventional transfer type laminate film.

[Explanation of symbols]

1 Conventional Transfer Type Laminated Film 2 Base Material of Transfer Type Laminated Film 2s Matte Surface of Base Material of Transfer Type Laminated Film 3 Laminate Layer or Thermoplastic Resin Layer of Conventional Transfer Type Laminated Film 3A Transfer type laminated film of the present invention Laminated layer 3 As of glossy surface of laminate layer of transferable laminated film of the present invention 4 Printing paper 6 Cast roll 7 Releasable glossy film 8 Releasable substrate having glossy surface 10 Transferable laminated film of this invention

Claims (4)

[Claims] 1. A substrate having a matte surface, and a laminate layer made of a thermoplastic resin formed on the matte surface of the substrate. The laminate layer is thermocompression bonded to form an image on photographic paper. A transfer-type laminated film, wherein the surface of the laminate layer opposite to the base material is a glossy surface. 2. A thermoplastic resin layer is formed by coating or extruding on the mat-shaped surface of a mat-shaped substrate, and the surface of the thermoplastic resin layer is then made glossy by a cast roll. The method for producing a transfer laminate film according to claim 1. 3. A thermoplastic resin layer is formed on the mat-shaped surface of a substrate having a mat-shaped surface by coating or extrusion, and then a peelable gloss film is thermally laminated on the surface of the thermoplastic resin layer, After that, the peelable glossy film is peeled off. The method for producing a transfer laminate film according to claim 1, wherein the peelable glossy film is peeled off. 4. A thermoplastic resin layer is formed by coating or extruding on a releasable base material having a glossy surface, and then the thermoplastic resin layer formed on the releasable base material has a matte surface. The method for producing a transfer-type laminated film according to claim 1, wherein the mat-like surface of the material is superposed on the mat-shaped surface and heat-laminated, and then the releasable substrate is peeled off.