JPH10193778A - Film for ink jet printing and printing medium utilizing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture easily a recording medium capable of printing an image sharply and maintaining the stability of the image by forming the medium out of a protective layer and an ink receiving layer scattering therein resin particles having hot-melt adhesive properties. SOLUTION: A cross-section has a structure that an ink receiving layer 2 is laminated on a protective layer 1, through which a printed image can be identified, which protects the image from a flaw, a stain, light, etc., and which is a transparent or a semitransparent porous protective layer having moderate flexibility. Further, the ink receiving layer 2 is a film comprising a hydrophilic resin, or a film comprising a composition in which a filler is added to this hydrophilic resin as necessary, and forms a structure having hot- melt adhesive particles 3 scattered in this film. The hot-melt adhesive particles 3 are synthetic resin particles having hot-melt adhesive properties, and it is necessary to have the inability of absorbing water based ink in order to maintain the sharpness of an image. By this method, a recording medium excellent in printability and having the image protective function and adhesive properties can be obtained in a simple manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film and a printing material for ink jet printing, and more particularly to an image protection capable of protecting an image, enhancing durability, and giving a glossy or matte appearance. Ink jet printing film consisting of a layer and a printing layer, and further having an adhesive layer that can be adhered to various kinds of substrates by heating, and capable of printing an image or the like by an ink jet recording method. And printing materials.

[0002]

2. Description of the Related Art In recent years, plateless printing has been progressing due to advances in computers. That is, by using an ink jet printer, an inexpensive printing system can be constructed, and an environment in which small quantities of various kinds of printed matter can be provided at low cost is being prepared.

[0003] However, in this case, the ink jet printer mainly uses a dye or pigment dissolved or dispersed in an aqueous medium as a recording agent.
Solvent resistance and abrasion resistance are not always sufficient. Further, many of the pigments and dyes used as recording agent components have poor weather resistance when used outdoors, and have the problem of easily causing discoloration, fading and decoloring of images.

[0004] In order to solve such a drawback, a method is usually employed in which an image is formed and a protective layer is formed by applying a liquid overcoating agent. However, since this method applies a resin solution, there are problems such as a loss of image clarity, an increase in the number of steps, a problem in working environment, and an increase in cost.

Further, there has been proposed a member for laminating a printed matter provided with a protective layer by transferring a protective layer having an adhesive or pressure-sensitive adhesive layer formed in advance to an image. For example, JP-A-61-230973 can be mentioned.
However, although this member can improve the stability of an image, it has problems such as a complicated structure of the member, many steps in manufacturing, and high cost.

JP-A-58-224779 proposes a method of laminating an adhesive layer simultaneously with ink jet printing. Although there is an advantage that the process is omitted, a special printing device with a built-in laminator is indispensable, and there has been a problem that the simplicity of the ink jet printer has been lost, the device has to be complicated, and the cost increases accordingly. .

Japanese Patent Publication No. 6-84099 proposes a back print recording material. This recording material is composed of a protective layer, an ink receiving layer, and an ink permeable layer, and has a problem that the production cost is increased due to the multilayer structure. Further, the adhesive layer needs to be formed after printing, which increases the number of steps and causes a problem in working environment.

[0008] In these techniques, it is necessary to print on a single film or sheet, and then form an adhesive layer or a protective layer by post-processing. Since the probability of occurrence of defective products is high, there has been a problem that the cost increases accordingly.

Japanese Patent Application Laid-Open No. Hei 5-169798 discloses that
A recording material in which a heat-active adhesive is formed as an ink-receiving layer has been proposed. In this case, the adhesive strength is weak and the durability is low.
There was a problem with chemical resistance and the range of use was limited. Further, when the film is adhered to a substrate at a high temperature, there is a problem that an image flows and image sharpness is reduced.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to easily produce a recording material which can be printed clearly by an ink jet printer and maintains image stability without going through a complicated production process. It is an object of the present invention to provide a film and a printing material for ink jet printing which can be used.

[0011]

SUMMARY OF THE INVENTION Conventionally, a single film,
It has been difficult to give the sheet three functions of protection, printing and adhesion. Therefore, it is necessary to provide an adhesive layer or a protective layer by post-processing after printing in order to impart durability and chemical resistance.

The inventor of the present invention has made intensive studies on the idea that if a single film or sheet can be provided with three functions of protection, printability and adhesiveness, the cost can be reduced. As a result, the protective layer and the ink receiving layer 2
In the layer film or sheet, the adhesive fine particles which are heat-activated at a temperature at which the ink receiving layer is not deformed are uniformly dispersed in the structure forming the ink receiving layer, or It has been found that by forming the adhesive layer in a dot or web form, it is possible to impart three functions of protection, ink receptivity and adhesiveness, thereby completing the present invention.

That is, the present invention provides an ink jet printing film comprising a protective layer (A) and an ink receiving layer (B) in which resin particles having hot melt properties are dispersed. Further, the present invention provides an ink jet printing film comprising a protective layer (A), an ink receiving layer (B '), and a dot layer or a web layer (C) of a resin or a pressure-sensitive adhesive having a hot melt property. is there.

Preferably, the resin having a hot-melt property of the ink receiving layer (B) is a polyurethane resin, more preferably, the isocyanate component of the polyurethane resin is an aliphatic isocyanate or an alicyclic isocyanate. An object of the present invention is to provide an ink jet printing film in which the shape of resin particles having a hot melt property is spherical.

Preferably, the present invention provides an ink jet printing film in which the protective layer (A) is composed of an aliphatic or alicyclic polyurethane polyurea resin. Preferably, the ink receiving layer (B) or the ink receiving layer (B ') provides an ink jet printing film comprising an aqueous urethane resin, acetoacetylated vinyl alcohol, and epichlorohydrin polyamide resin.

The present invention further provides a printing material obtained by bonding a printing film obtained by printing an image with an ink jet printer to the ink receiving layer of the ink jet printing film and a support.

[0017]

Next, the ink jet printing film of the present invention will be described in detail with reference to the drawings.

FIGS. 1 and 2 are cross-sectional views of an example of an adhesive recording material having a protective layer according to the present invention. Figure 1 shows the protective layer (A)
Has a structure in which an ink receiving layer (B) is laminated, and particles 3 of a hot melt adhesive are dispersed in the ink receiving layer (B).

The protective layer (A) of the present invention can discriminate an image printed by ink jet through this protective layer, protects the image from scratches, dirt, light, water, chemicals, etc., and has an appropriate flexibility. A transparent or translucent non-porous protective layer. As the shape of the protective layer, a flat plate such as a film, a sheet, and a plate is used.

The synthetic resin constituting the protective layer includes:
Any type can be used as long as it can exert the above function as the protective layer, for example, olefins such as polyester resin, diacetate resin, triacetate resin, acrylic resin, cellophane, celluloid, polyethylene, and polypropylene. Resin, polyvinyl chloride, polycarbonate, polyimide, polyamide, fluorine resin, polyurethane resin and the like. Among these, a polyurethane polyurea resin is preferred from the viewpoint of durability, abrasion resistance and water resistance, and among them, an aliphatic or alicyclic polyurethane polyurea resin is more preferred from the viewpoint of difficulty in discoloration.

In addition to these resins, a pigment dispersant, a thickener, an antifoaming agent, a release agent, a penetrant, a fluorescent whitening agent, an antioxidant, an antirust agent, , An ultraviolet absorber or the like can be appropriately compounded.

This protective layer needs to be bonded to the ink receiving layer. In the case of a hardly-adhesive film such as an olefin resin film or a fluorine resin film, a corona treatment or a corona treatment is used to enhance the adhesion. It is possible to perform a primer treatment.

The thickness of the protective layer is not particularly limited, but is 5 to 1000 μm, preferably 10 to 150 μm.
μm. This is because if the thickness is less than 5 μm, the mechanical resistance becomes insufficient and the function as a protective layer cannot be achieved. On the other hand, when the thickness exceeds 1000 μm, transparency is insufficient, and the image clarity via the protective layer tends to decrease.

The ink receiving layer (B) formed by dispersing the resin particles 3 having the hot-melt property of the present invention is a film made of a hydrophilic resin and, if necessary, a composition obtained by adding a filler to this resin. It has a structure in which hot melt adhesive particles are dispersed in a film.

This ink receiving layer (B) has a water-based ink jet printing ink absorption capacity and is a hot-melt adhesive which is dispersed or a hot-melt adhesive which is formed in a dot or web form on its surface. It is necessary that the temperature hardly deforms.

Examples of the hydrophilic resin include cellulose derivatives such as oxidized starch and carboxymethyl cellulose, casein, gelatin, polyvinyl alcohol and derivatives thereof, diene latex such as styrene-butadiene copolymer, melamine resin, urea resin, polyurethane resin, and the like. Examples include hydrophilic synthetic resins such as polyurethane urea resins, unsaturated polyester resins, and alkyd resins, and these resins may be used alone or in combination. Among these, in particular, a resin containing an aqueous urethane resin, an acetoacetylated vinyl alcohol, and an epichlorohydrin polyamide resin as essential components is preferable from the viewpoints of adhesion with a protective layer, water resistance, image clarity, and coloring. .

Examples of the filler include inorganic substances such as calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium oxide, diatomaceous earth, silica, aluminum hydroxide, and alumina; styrene plastic pigments and acrylic plastic pigments. Organic matter.

In order to prevent the aqueous ink from flowing into water, a cationic resin may be added as a waterproofing agent. Examples of the cationic resin include polyamine-based compounds such as polyethyleneimyleneimine, polyvinylamine, polyvinylacetamide, and polyamidepolyamine, and neutralized products such as hydrochlorides and sulfonates thereof.

In the ink receiving layer (B), if necessary,
A pigment dispersant, a thickener, an antifoaming agent, a release agent, a penetrant, a fluorescent brightener, an antioxidant, a rust inhibitor, an ultraviolet absorber, and the like can be appropriately compounded. As the thickness of the ink receiving layer,
It is preferably from 5 to 1000 μm, more preferably from 10 to 3 μm.
0 μm, and a preferable film thickness is appropriately selected depending on ink absorbency and drying property. If it is less than 5 μm, the ink receiving layer will have insufficient absolute ink absorbency, will have poor drying properties, and will have bleeding and runoff on the image. On the other hand, if the thickness exceeds 1000 μm, there is no blur or flow of the image, but it is not preferable because the transparency is poor and the image clarity via the protective layer is deteriorated.

The hot melt adhesive 3 dispersed in the ink receiving layer (B) of the present invention is a synthetic resin particle having hot melt adhesiveness. Examples of the synthetic resin include a polyamide resin, a polyester resin, a polyurethane resin, a polyethylene resin, and a polyvinyl chloride resin.
These can be used alone or as a mixture. Of these, the use of a polyurethane-based resin is particularly preferable because of its good washing resistance, dry cleaning resistance and adaptability to multiple substrates.

Further, the isocyanate component of the polyurethane resin is preferably an aliphatic isocyanate or an alicyclic isocyanate because it does not discolor yellow over time.

The aliphatic or alicyclic isocyanates include, for example, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, decamethylene diisocyanate,
Examples thereof include 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, 4,4′-methylenebis (cyclohexane diisocyanate), 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, and isophorone diisocyanate.

It is essential that the heat activation temperature of the hot melt adhesive 3 is not higher than the heat flowing temperature of the ink receiving layer (B), usually not higher than 200 ° C., preferably from 80 to 150 ° C.
It is. When the thermal activation temperature is high, the adherend is unsuitable because it is deteriorated. In addition, this hot melt adhesive 3
Must have no water-based ink absorption capacity. If the ink has an ink absorbing ability, the ink adheres to the particles at the time of printing, and the ink is present on the uneven surface, so that the apparent drying property is deteriorated. In addition, the sharpness of an image is lost due to bleeding or the like due to melting and deformation of colored particles at the time of hot melt adhesion. On the other hand, when there is no ink absorbing ability, the ink does not adhere to the particles during printing, slips off, and the ink is absorbed by the continuous layer having the absorbing ability. Drying property is improved.
Further, at the time of hot-melt bonding, since the particles are not colored, there is no color bleeding or the like, and since the ink receiving layer (B) does not deform at the activation temperature, the sharpness of the image is maintained.

The shape of these hot-melt adhesive particles 3 in the ink receiving layer (B) may be irregular, but if they are spherical, they will easily slip off even if the ink adheres to the particles during printing. This is preferable since the apparent dryness and maintenance of image clarity at the time of hot melt adhesion are improved.

The average particle size of the hot melt adhesive particles can be selected according to the resolution of the printer. It is necessary that the resolution is sufficiently smaller than the dot diameter of the ink jet printer. If the size is too large, the print clarity is disadvantageous. If the size is too small, the adhesiveness is disadvantageous. For example, when the resolution of the printer is 360 DPI, it is usually 0.1 to 300 μm, and preferably 1 to 50 μm. .

FIG. 2 shows a structure in which an ink receiving layer (B ') is laminated on a protective layer (A), and a layer (C) of a dot or web-like hot melt adhesive or pressure-sensitive adhesive 5 is laminated. It has become.

The ink receiving layer (B ′) of the present invention is a layer having the same composition as the ink receiving layer (B) of FIG. 1, and in which the resin particles 5 having hot melt properties are not dispersed. This is a film composed of a hydrophilic resin and a composition obtained by adding a filler to this resin as required.

Examples of the hydrophilic resin include the above-mentioned hydrophilic resins. Among them, an aqueous urethane resin, an acetoacetylated vinyl alcohol and an epichlorohydrin polyamide resin are essential components. This is preferred from the viewpoints of water resistance, water resistance, image clarity, and color development.

As the resin having the hot melt property of the present invention or the resin having the hot melt property of the dot layer or the web layer (C) of the pressure-sensitive adhesive, the above-mentioned resin having the hot melt property can be used as it is. Examples of the adhesive include a thermoplastic resin such as a polyamide resin, a polyester resin, a polyurethane resin, a polyethylene resin, a polyvinyl chloride resin, and an acrylic resin.
Adhesive resins such as ethylene vinyl acetate resins and urethane resins are exemplified.

It is essential that the heat activation temperature of the hot melt adhesive is not higher than the heat flowing temperature of the ink receiving layer (B '), and is usually not higher than 200.degree. C., preferably 80 to 150.degree.
It is. When the thermal activation temperature is high, the adherend is unsuitable because it is deteriorated. It is necessary that the hot melt adhesive and the pressure-sensitive adhesive have no water-based ink absorbing ability.
If the ink has an ink absorbing ability, the ink adheres to the particles at the time of printing, and the ink is present on the uneven surface, so that the apparent drying property is deteriorated. In addition, the sharpness of an image is lost due to bleeding or the like due to melting and deformation of colored particles at the time of hot melt adhesion. On the other hand, when there is no ink absorption ability, even if the ink adheres to the particles at the time of printing, it slips down, and the ink is absorbed by the continuous layer having the absorption ability. The performance is improved.
Further, at the time of hot-melt bonding, since the particles are not colored, there is no color bleeding or the like, and since the ink receiving layer (B ') does not deform at the activation temperature, the sharpness of the image is maintained.

The layer of the hot melt adhesive or pressure-sensitive adhesive 5 has a dot shape or a web shape, and the size of the dot can be selected according to the resolution of the printer.
It is necessary to be sufficiently smaller than the dot diameter of the resolution of the ink jet printer, and if it is too large, it will cause inconvenience in print clarity, and if it is too small, it will cause inconvenience in adhesiveness. For example, when the resolution of the printer is 360 DPI, In the case of a dot shape, the diameter is in the range, and in the case of a web shape, the diameter of the fiber is in the range of 0.1 to 300 μm, preferably 1 to 50 μm.

An image is printed on the ink receiving layer of the ink jet printing film by an ink jet printer,
The printing material of the present invention can be prepared by bonding the support.

As the support of the present invention, a molded article having a complicated shape can be used in addition to a planar one such as a film, a sheet, a plate, etc. made of paper, fiber, plastic, and metal.

The film for forming the ink jet printing film of the present invention can be prepared by a known method. That is, a liquid resin solution is cast on a support film at a constant thickness, and a solvent is dried to form a film.
A method of extruding a film with a constant thickness using a die or the like may be used. Further, although the film and sheet of the present invention have a multilayer structure, they may be formed in order of each layer, or each layer may be formed individually and then laminated to form a multilayer film or sheet.

The lamination is performed by a known method, for example, a method using heat lamination or an adhesive. In addition, a surfactant may be used as needed during film formation,
Swelling agents, stabilizers, coloring agents, UV inhibitors, optical brighteners,
Additives such as antistatic agents can be added.

As the support film used in the present invention, known release films, release papers, general-purpose films and the like are used. These films include, for example, polyester,
Polycarbonate, polyarylate, polyether sulfone, polyimide, polyamide, polyamide imide, polyfluoroethylene, polypropylene and other plastic films, paper, cloth, metal foil, and the like. Alternatively, a material whose surface has been subjected to a surface treatment such as coating with a release treatment agent having various release properties such as a silicone resin can be used.

The thickness of the supporting film is 5 to 1000 μm
And preferably 10 to 150 μm. This is appropriately selected in consideration of ease of handling, ease of heat transmission during heating, and the like. As the surface state, a smooth or mat-like surface can be used. If a smooth surface is used, the surface of the protective layer becomes glossy. Is matted,
These can be appropriately selected depending on the design.

The printing material of the present invention may be used for indoor and outdoor kanbans. As a method of using the printing material of the present invention, after performing transfer printing on the ink jet printing film with an ink jet printer to form an image, the film is directly laminated to a base material forming a kanban using a thermal laminator, and cooled. Thereafter, the release layer is peeled off. By producing a kanban using this base material, an image can be clearly recognized through the protective layer, and since the image is protected by the protective layer, it is possible to produce a durable kanban with a simple configuration. it can.

The printing material of the present invention can also be used in the same manner as indoor interiors such as wallpaper, windows, ceilings, and exteriors such as shutters, outer walls, and roofs. Also,
Since the printing material of the present invention can be adhered to various base materials, it can also be used for emblems and transfer marks as clothing.

Further, since the printing material of the present invention has resistance to washing and dry cleaning, it can be used for caution labels, customer management name tags and the like.

[0051]

The present invention will be specifically described below with reference to examples. All parts and percentages in the examples are on a weight basis.

Example 1 Formulation solution 1 was cast on a 50 μm transparent PET film (Lumirror type T, manufactured by Toray Co., Ltd.) as a protective layer.
The resultant was dried by ventilation at 120 ° C. for 1 minute and at 120 ° C. for 2 minutes to obtain a two-layer film A in which hot melt adhesive particles were dispersed in an ink receiving layer having a thickness of 20 μm. For evaluation of printability, this film A was cut into A4 size, and BJC88 manufactured by Canon
Table 1 shows the results of test printing performed using a No. 0 (ink jet printer).

This film was put on a kite cloth at 120 ° C. and 0.3 kg.
/ cm 2 for 10 seconds to obtain a laminated printing material a. This evaluation is shown in Table 2. Formulation 1 Gosefimer Z-200: 20 parts [acetoacetylated polyvinyl alcohol manufactured by Nippon Synthetic Chemical Co., Ltd.] VESTAMELT 450-P1: 20 parts [Hurus AG, polyamide-based hot melt powder of 0 to 80 microns] Flow start temperature : Approx. 100 ° C (Koka type flow tester, orifice 1 × 1 mm, load 10 kgf / cm ² )] Aerosil 200: 1 part [Nippon Aerosil, silica fine particles] Irganox B75: 0.5 part [Chiba Geigi, antioxidant Agent] Megafac F470: 1 part [Surfactant, manufactured by Dainippon Ink and Chemicals, Inc.] Water: 80 parts Example 2 Formulation liquid 2 was cast on a PET release film using a knife edge coater, and then heated to 80 ° C. For 1 minute and air drying at 140 ° C. for 3 minutes to obtain a protective layer of 20 μm. The resin of Formulation 3 was cast thereon with a knife-edge coater with a clearance of 150 μm, and dried by ventilation at 100 ° C. for 3 minutes to obtain a film B having a release layer.

The printability of this film B was evaluated in the same manner as in Example 1, and the results are shown in Table 1. This film was hot-pressed on a tarpaulin at 110 ° C. and 0.6 kg / cm ² for 10 seconds to bond it. After cooling, the PET release film was peeled off to obtain a printing material b having high gloss. This evaluation is shown in Table 2.

Formulation 2 Tyforce CS-375: 100 parts [Dai Nippon Ink Chemical Co., Ltd., non-yellowing type urethane urea resin solution, concentration 25%] Super Beckamine L-145-45: 1 part [Large Nippon Ink and Chemicals, Inc., melamine crosslinking agent] Becamine P198: 0.05 parts [Dai Nippon Ink and Chemicals, Inc., melamine crosslinking catalyst] SANOL LS765: 1.0 parts [Ciba-Geigy, antioxidant] Formulation 3 Hydran HW-970: 75 parts [Dainippon Ink and Chemicals, Inc. polyurethane aqueous dispersion concentration 40%] Gosefimer Z-200: 70 parts [Nippon Synthetic Chemical Co., Ltd., acetoacetylated polyvinyl alcohol] WS535: 30 parts [Epichlorohydrin polyamide resin manufactured by Nippon PMC Co., Ltd.] Tyforce PW-16: 150 parts [Large] Fine spherical spherical urethane-based hot melt adhesive manufactured by Nippon Ink Chemical Industry Co., Ltd. Fine particles, average particle diameter 45 μm, flow start temperature 104 ° C.] Water: 500 parts Example 3 Mixing 2 on a mat-like PET release film with a knife The film was cast with an edge coater and dried by ventilation at 80 ° C. for 1 minute and at 140 ° C. for 3 minutes to obtain a protective layer of 20 μm. The resin of Formulation 4 was cast thereon with a knife edge coater with a clearance of 150 microns, and dried by ventilation at 100 ° C. for 3 minutes. Further, TYFORCE AH-500 [solvent type aromatic urethane-based hot melt type adhesive, concentration 55%, manufactured by Dainippon Ink and Chemicals, Inc.] was applied on a 400 mesh screen, and air-dried at 100 ° C. for 2 minutes. A film C having a release layer was obtained. Table 1 shows the results of cutting this film C into A4 size paper and printing the back surface using BJC880 manufactured by Canon. This film C was bonded to an ABS plate by hot pressing at 120 ° C. and 0.6 kg / cm ² for 5 seconds, and after cooling, the PET release film was peeled off to obtain a mat-like printing material c. Table 2 shows the evaluation results.

Formulation 4 Hydran HW-970: 60 parts [Polyurethane aqueous dispersion concentration: 40%, manufactured by Dainippon Ink and Chemicals, Inc.] Gosefimer Z-200: 70 parts [Acetoacetylation manufactured by Nippon Synthetic Chemical Co., Ltd.] Polyvinyl alcohol] WS535: 45 parts [Epichlorohydrin polyamide resin manufactured by Nippon PMC Co., Ltd.] Water: 500 parts

[0057]

[Table 1] Drying property: One minute after printing is completed, paper is applied to the printing surface. × indicates that ink has adhered to the paper, ○ indicates that no ink has adhered to the paper, and the same operation immediately after printing. The case where there was no adhesion was evaluated as ◎.

Color development and sharpness: The image passed through the protective layer was visually evaluated. Subsequent step: a step of providing an adhesive layer or a protective layer. *: Since no protective layer was provided, the image was directly evaluated visually, not on the rear surface.

Comparative Example 1 In the film of Example 3, TYFORCE AH-500 [manufactured by Dainippon Ink and Chemicals, Inc., solvent-type aromatic urethane hot-melt adhesive, concentration of 55% was used instead of screen coating. ] The film was cast with a knife edge coater at a clearance of 150 microns, and dried by ventilation at 100 ° C for 3 minutes to obtain a film D having a release layer. This film D is cut to A4 size, and BJC8 manufactured by Canon
Table 1 shows the results of printing the back surface at 80. The adhesive layer completely covered the ink receiving layer, and the adhesive layer had no ink absorbing ability, and the ink flowed after printing, and was not practical.

[0060]

[Table 2] Water resistance: Immersion in water at room temperature for 24 hours, blurring of image,
The fading was visually evaluated.

Washing resistance: washing three times, image blurring,
The fading was visually evaluated. Adhesion: After washing three times, the presence or absence of peeling was evaluated. Image sharpness: The image passing through the protective layer was visually evaluated for any deterioration in image quality in the bonding step.

Flexibility: The feeling of the film was evaluated. Curved surface followability: Evaluate changes in appearance by bending the substrate. The case where there was no change was evaluated as ○, and the case where whitening or peeling was observed was evaluated as ×.

*: Since there was no protective layer, the image was directly evaluated visually, not on the back surface. Comparative Example 2 An image was printed on a commercially available ink jet printing film Color BJ Glossy Film HG-101 [manufactured by Canon Inc.] (Film E) using a Canon BJC880, and a Typhoon ST-24 [Dainippon] Solvent-based aliphatic urethane urea resin solution, room temperature drying type, manufactured by Ink Chemical Industry Co., Ltd., concentration: 40%] was applied as a protective layer by spraying, and dried at 100 ° C for 1 minute to form a protective layer. Although good printability and durability were exhibited, complicated steps such as a coating step and a drying step were required.

Comparative Example 3 Back print film BF-102 [Canon Co., Ltd.]
Manufactured by Canon BJC880 on Film F), and the surface of this ink permeable layer is
D-865HV [solvent-type aromatic urethane-based adhesive manufactured by Dainippon Ink and Chemicals, Inc.] was applied, dried at 100 ° C. for 2 minutes, and immediately adhered to tarpaulin and pressed. Although good printability and durability were exhibited, complicated steps such as a coating step, a drying step, and the like were required.

Comparative Example 4 A resin of Formulation 4 was cast on a matte PET release film with a clearance of 150 μm using a knife edge coater, and dried by ventilation at 100 ° C. for 3 minutes. Further, TYFORCE AH-500 [solvent type aromatic urethane hot melt type adhesive manufactured by Dainippon Ink and Chemicals, Inc., concentration 55%] is cast with a knife edge coater at a clearance of 150 μm and 100 ° C. for 3 minutes. The film was dried by ventilation and the release layer was peeled off after cooling to obtain a film G. Printing was performed on this film using BJC880, and the evaluation results are shown in Table 1. This film is put on kite cloth at 120 ℃, 0.3kg
/ cm ² for 10 seconds to obtain a laminated printing material d. This evaluation is shown in Table 2. Because it does not have a protective layer,
Water resistance and washing resistance were poor.

[0066]

The film for ink jet printing of the present invention has not only excellent ink jet printability but also an image protection function and adhesiveness, and can be obtained by a simple method.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of one embodiment of the ink jet printing film of the present invention.

FIG. 2 is a cross-sectional view of one embodiment of the ink jet printing film of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Protective layer (A) 2 Ink receiving layer (B) 3 Hot melt adhesive 4 Ink receiving layer (B ') 5 Dot-shaped or web-shaped hot-melt adhesive or adhesive

Claims (9)

[Claims] An ink jet printing film comprising a protective layer (A) and an ink receiving layer (B) in which resin particles having hot melt properties are dispersed. 2. An ink jet printing film comprising a protective layer (A), an ink receiving layer (B '), and a dot layer or a web layer (C) of a resin or pressure-sensitive adhesive having a hot melt property. 3. The film according to claim 1, wherein the resin having a hot melt property of the ink receiving layer (B) is a polyurethane resin. 4. The film according to claim 1, wherein the shape of the resin particles having a hot-melt property is spherical. 5. The film according to claim 3, wherein the isocyanate component of the polyurethane resin is an aliphatic isocyanate or an alicyclic isocyanate. 6. The film according to claim 1, wherein the protective layer (A) is made of an aliphatic or alicyclic polyurethane polyurea resin. 7. The film according to claim 1, wherein the ink receiving layer (B) comprises an aqueous urethane resin, acetoacetylated vinyl alcohol, and epichlorohydrin polyamide resin. 8. The film according to claim 2, wherein the ink receiving layer (B ′) comprises an aqueous urethane resin, acetoacetylated vinyl alcohol, and epichlorohydrin polyamide resin. 9. A printing material obtained by bonding a printing film obtained by printing an image with an ink jet printer to an ink receiving layer of the ink jet printing film according to claim 1 and a support. .