JP2002127588A - Sheet for ink jet recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet for ink jet recording which makes printed matter stick with excellent fitness to an object having a curved surface, of which the ink receiving layer changes in a shape in conformity with the shape of the object of sticking and which is free from a crack of an image and excellent in outward appearance and water resistance. SOLUTION: Regarding the sheet for ink jet recording, a load required for displacing it by 2% in the longitudinal direction (MD) of a synthetic resin film and in the direction (CD) at a right angle thereto is 0.50-2.0 kgf and the MD/CD ratio of the load is 0.70-1.3, while the ink receiving layer at least on one surface of the synthetic resin film is constituted mainly of a pigment, a non-water- soluble resin as an adhesive having a glass transition temperature of -30-+30 deg.C, a water-soluble polymer resin and a cationic polymer resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an advertisement and a signboard,
The present invention relates to an ink jet recording sheet mainly used by attaching a printed matter to an object having a curved surface.

[0002]

2. Description of the Related Art Ink-jet recording systems have been widely used as recording apparatuses for various graphics and color images, including characters, because of low noise during recording, easy colorization, and high-speed recording. It is rapidly spreading in applications. For this reason, the use for advertisements such as posters, signs, and the like is increasing.

[0003] When used as an advertisement or signboard, it is often exhibited outdoors, so that it is required to have water resistance against the weather. For such paper, an ink receiving layer is provided on the surface of a synthetic resin film. Recording sheet (Japanese Unexamined Patent Publication No.
No. 250092). However, a recording sheet using this synthetic resin film is difficult to adhere with good fit according to the shape of an object having a curved surface, a space is easily created between the object and the recording sheet, and the appearance is poor. Disadvantage.

On the other hand, there is disclosed a recording sheet (Japanese Patent Laid-Open No. 2000-37949) to be adhered with good fit according to the shape of an object such as a wall or a window. According to the shape of the object, according to the shape of the object, it is said that the elasticity should be specified as an index of the softness of the synthetic resin film in order to adhere with good fit, but the synthetic resin film fits according to the shape of the object If the ink receiving layer is not deformed in accordance with the shape of the object to be attached even if the ink receiving layer is adhered well, the receiving layer will crack, the printed image will be broken, and the appearance of the image will be poor.

[0005]

According to the present invention, a printed material is stuck to an object having a curved surface with good fit, and the ink receiving layer is deformed according to the shape of the object to be stuck. To provide an ink jet recording sheet having good water resistance and excellent water resistance.

[0006]

The present invention employs the following configuration in order to solve the above-mentioned problems. That is, the present invention provides: [1] In an inkjet recording sheet having a synthetic resin film and an ink receiving layer formed on at least one surface thereof, a longitudinal direction (MD) of the synthetic resin film and a direction perpendicular thereto (CD) ) Is 0.50 to 2.0 kgf, and the load required to displace 2% to each
The MD / CD ratio of the load is in a range of 0.70 to 1.3, and the ink receiving layer is a pigment or an adhesive containing a water-insoluble synthetic resin having a glass transition temperature of -30 to + 30 ° C; An ink-jet recording sheet comprising, as a main component, a cationic polymer resin and a cationic polymer resin.

[0007] The present invention includes the following aspects. [2] The ink jet recording sheet according to [1], wherein the adhesive is contained in an amount of 20 to 40% by weight based on the total solid content of the ink receiving layer. [3] The ink jet recording sheet according to [2], wherein the content of the water-insoluble synthetic resin in the adhesive is in the range of 20 to 80% by weight of the whole adhesive. [4] Any of [1] to [3], wherein an undercoat layer containing a pigment and a water-insoluble binder is provided adjacent to one surface of the synthetic resin film and the ink receiving layer is provided. The sheet for inkjet recording according to the above.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION In order to adhere an ink jet recording sheet with good appearance according to the shape of an object to be attached, first, it is necessary that the synthetic resin film is appropriately soft, and the ink receiving layer is also attached to the object. It is necessary to deform according to the shape. Work is often performed by adult women, and it is required to work without difficulty.
As a synthetic resin film which is moderately soft and excellent in water resistance, a load required for displacing 2% in the longitudinal direction (MD) and the direction perpendicular thereto (CD) of the synthetic resin film is 0.50 to 2. A synthetic resin film having a weight of 0 kgf and a MD / CD ratio of the load in the range of 0.70 to 1.3 is preferable. Required load is 0.50k
If it is less than gf, the synthetic resin film is too soft and stretches even if it is slightly pulled, and if it exceeds 2.0 kgf, it is deformed according to the shape of the object to which the synthetic resin film is attached because it is hard. It becomes difficult. When the ratio of MD / CD of the load is less than 0.7, it tends to extend in the MD direction, and when the ratio of MD / CD of the load exceeds 1.3, it tends to extend in the CD direction. It becomes difficult to paste well.

In the present invention, since the synthetic resin film is often displayed outdoors, a water-resistant synthetic resin film is used. As the synthetic resin film, an olefin resin or a vinyl chloride resin may be used as long as it is excellent in water resistance and is a soft synthetic resin film, and the material is not particularly limited. Generally, a synthetic resin film is produced by rolling a compound obtained by kneading a resin such as vinyl chloride or polypropylene with an additive such as a softening agent and a white pigment by a calender roll, and biaxially stretching the compound. There is a way to make it. The MD / CD ratio of the load for deforming the synthetic resin film formed by rolling is close to 1, but the MD / CD ratio of the load for deforming the synthetic resin film formed by biaxial stretching is 0.70. To 1.3.

[0010] As a layer constitution of the ink jet recording sheet of the present invention, an ink receiving layer is provided on a synthetic resin film. Due to the characteristics of the synthetic resin film, when the ink receiving layer is provided directly on the synthetic resin film, the compatibility between the synthetic resin film and the ink receiving layer is poor, and when the coating strength of the ink receiving layer becomes weak, the An undercoat layer is provided thereon, and an ink receiving layer is provided thereon. By providing the undercoat layer, it is possible to provide an ink-receiving layer that has a high coating film strength and is hard to peel off the coating film. The undercoat layer preferably contains a water-insoluble binder.

[0011] The undercoat layer contains a pigment and a water-insoluble binder. By containing the water-insoluble binder in an amount of 20 parts by weight or more and 50 parts by weight or less based on 100 parts by weight of the solid content of the undercoat layer, the adhesion between the undercoat layer and the ink receiving layer becomes good, The water resistance between the ink receiving layers is improved.

As the pigment used for the undercoat layer,
For example, the following can be illustrated. Examples of such substances include calcium carbonate, clay, calcined clay, diatomaceous earth, talc, silica, magnesium carbonate, titanium oxide, aluminum hydroxide, and organic pigments. These pigments can be used in combination of two or more as needed.

Examples of the water-insoluble binder used in the undercoat layer include the following. Styrene-butadiene copolymer, butadiene-based latex such as methyl methacrylate-butadiene copolymer, acrylic polymer latex such as acrylate and methacrylate polymer or copolymer, or vinyl such as vinyl acetate copolymer Substances such as a polymer latex can be exemplified. These adhesives can be used in combination of two or more as necessary.

The ink receiving layer contains a pigment and an adhesive, a water-insoluble synthetic resin having a glass transition temperature of -30 to + 30 ° C., a water-soluble polymer resin, and a cationic polymer resin. The pigment has an average particle diameter of 12 to 12 so that the pigment absorbs the ink solvent and does not crack when the ink receiving layer is bent.
0.1 μm is preferred. The water-insoluble synthetic resin imparts flexibility to the coating film of the ink receiving layer. The water-soluble polymer resin absorbs the ink solvent, and the cationic polymer resin
It has the function of improving the water resistance of the ink.

As the pigment used in the ink receiving layer,
It is preferable to use a material having high oil absorbency and a large specific surface area, which is porous, has good absorbability of the recording ink solvent, and enables clear color development. When the solvent absorbency of the pigment is low, the ink does not sufficiently absorb the dispersion solvent component of the ink during inkjet recording, and the ink overflows on the surface of the recording medium. So-called bleeding may occur and a clear image may not be obtained. Examples of pigments include amorphous synthetic silica, colloidal silica, calcined kaolin, diatomaceous earth, aluminum hydroxide, light calcium carbonate, magnesium hydroxide, magnesium carbonate, alumina pigments, inorganic pigments such as zeolite, and urea-formalin resin filler. And organic pigments such as styrene plastic pigment, acrylic plastic pigment, urea resin plastic pigment, benzoguanamine plastic pigment, and acrylonitrile plastic pigment.

In particular, amorphous synthetic silica is preferable because it has good solvent absorbency for the recording ink. The average particle size of the amorphous synthetic silica is preferably from 12 to 0.1 μm. When the average particle size exceeds 12 μm, the ink receiving layer is easily cracked when the ink jet recording sheet is bent, and the appearance of the recorded image deteriorates. The use ratio of the pigment is not particularly limited, but is 50 to 70% by weight based on the total solid content of the ink receiving layer.
It is. If it is less than 50% by weight, the ink absorbency becomes insufficient, and if it exceeds 70% by weight, the surface strength of the ink receiving layer may be reduced.

In order for the ink receiving layer to be deformed according to the shape of the object to be attached, a water-insoluble synthetic resin having a glass transition temperature of -30 to + 30 ° C. is used for the adhesive in the ink receiving layer. Is preferred. However, when all the adhesives are used as a water-insoluble synthetic resin having a glass transition temperature of -30 to + 30 ° C, the solvent absorbency of the recording ink decreases. Mixing and using a water-insoluble synthetic resin and a water-soluble polymer resin for the adhesive is because the water-insoluble synthetic resin imparts flexibility and water resistance to the coating film of the ink receiving layer, and the water-soluble polymer resin This is for imparting the ability to quickly absorb the solvent of the recording ink to the coating film of the receiving layer, and when both are used, the ink receiving layer is deformed according to the shape of the object to be attached, and the recording ink solvent absorbability is used. Is also excellent.

As the water-insoluble synthetic resin, a soft resin is preferable in order to improve the water resistance of the coating film and to make the coating film hard to be broken when the coating film of the ink receiving layer is bent, and has a glass transition temperature of -30 to +30. C. resins are preferred. Examples of such water-insoluble synthetic resins include vinyl polymer latex such as vinyl acetate-ethylene copolymer, butadiene latex such as styrene-butadiene copolymer, methyl methacrylate-butadiene copolymer, and acrylic acid. Acrylic polymer latex substances such as polymers and copolymers of esters and methacrylates can be exemplified. These water-insoluble resins can be used in combination of two or more as necessary.

The water-insoluble synthetic resin has a glass transition temperature of -30 to impart softness to the coating film of the ink receiving layer.
~ 30 ° C resins are preferred. The glass transition temperature is -3
If the temperature is lower than 0 ° C., the ink jet recording sheet may cause blocking, and if the glass transition temperature exceeds + 30 ° C., the ink receiving layer becomes hard and cracks easily occur when the ink receiving layer is bent.

Examples of the water-soluble polymer resin include polyvinyl alcohol derivatives such as polyvinyl alcohol, silanol-modified polyvinyl alcohol and cation-modified polyvinyl alcohol, proteins such as casein, starch derivatives such as starch and oxidized starch, polyvinyl pyrrolidone and carboxymethyl cellulose. Cellulose derivatives and the like can be used.

The ratio of the adhesive in the ink receiving layer is 20 to
40% by weight is preferred. If it is less than 20% by weight, the coating film strength will be weak, and if it exceeds 50% by weight, the use ratio of the pigment will be reduced, and the absorbency of the ink receiving layer may be reduced. The adhesive is composed of a water-insoluble synthetic resin and a water-soluble polymer resin, and the ratio of the water-insoluble synthetic resin in the adhesive is 2%.
It is in the range of 0 to 80% by weight. If the amount is less than 20% by weight, the coating film tends to be broken when the ink receiving layer coating film is bent, and if it exceeds 80% by weight, the ink absorbency of the coating film may decrease.

The ink receiving layer contains a cationic polymer resin for the purpose of improving the water resistance of a printed image of the recording ink. Examples of the cationic polymer resin include, for example, polydiallyldimethylammonium resin, polyethyleneimine resin, polyamide resin, polyamide epichlorohydrin resin, polyamidepolyamine epichlorohydrin resin, polydiallylamine resin, dicyandiamide condensate, and the like. They can be used alone or in combination of two or more.

If necessary, a pigment dispersant, a thickener, an antifoaming agent, a foam inhibitor, a foaming agent, a release agent, a penetrant, a wetting agent, a thermal gelling agent, a lubricant, and other additives in the technical field. Various known auxiliaries can be used.

After printing on the ink jet recording sheet of the present invention by a printer, an overlamination may be applied to further increase the water resistance and light resistance. As the sheet for overlamination, a sheet obtained by applying an adhesive to a transparent synthetic resin film is used. As the transparent synthetic resin film, a polyolefin film such as polyethylene or a polyester film is used.

[0025]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. In addition, the number of parts and% in an example show a weight part and weight%.

Example 1 As a synthetic resin film, a vinyl chloride film (manufactured by Tatsuno Chemical Co., Ltd., trade name: satin, white, additive rate of plasticizer, etc. 25)
%, Thickness 100 μm).

The coating composition for the undercoat layer is calcium carbonate (trade name: Callite S, manufactured by Shiroishi Central Research Institute Co., Ltd.).
A) 60 parts, acrylic emulsion (manufactured by JSR Corporation, trade name: AE-322) 40 parts, the concentration of this composition is 50%
Was added, mixed and stirred to obtain a paint for an undercoat layer. The above coating material was applied to one surface of a PVC film using a bar coater so that the coating amount after drying was 4.0 g / m ^2, and dried at 110 ° C.

The coating composition of the ink receiving layer is composed of 50 parts of amorphous synthetic silica (manufactured by Grace Japan Co., Ltd., trade name: Silojet P-616, particle diameter 12 μm), and Silojet P-405 (manufactured by Grace Japan Co., Ltd.). 50 parts of Silojet P-405, particle size 3.5 μm), 30 parts of silanol-modified polyvinyl alcohol (Kuraray Co., trade name: R-1130) as a water-soluble polymer resin, and acetic acid as a water-insoluble synthetic resin 30 parts of a vinyl-ethylene copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-473, glass transition temperature: 0 ° C.) and a cationic polymer resin (manufactured by Nikka Chemical Co., trade name: Neofix E) -117) 20 parts were mixed and stirred to obtain a paint for an ink receiving layer. The above coating material was applied on the undercoat layer with a bar coater so that the coating amount after drying was 13.0 g / m ^2, and dried at 110 ° C. to obtain an inkjet recording sheet.

Example 2 As a synthetic resin film, a polyethylene terephthalate film (manufactured by Sumika Plastics Co., Ltd., trade name: 200H)
W) was used.

The amount of the coating for the undercoat layer of Example 1 after drying on one side of the synthetic resin film was 4.0 g /
It was applied with a bar coater so as to obtain m ² and dried at 110 ° C. The ink receiving layer was applied on the surface of the undercoat layer. The coating composition of the ink receiving layer was composed of 50 parts of amorphous synthetic silica (trade name: Silojet P-616, particle size 12 μm, manufactured by Grace Japan), amorphous synthetic silica (trade name, manufactured by Grace Japan) : Silojet P-405, particle size: 3.5 μm) 50 parts, water-soluble polymer resin: silanol-modified polyvinyl alcohol (Kuraray Co., trade name: R-1130) 15 parts, water-insoluble synthetic resin: vinyl acetate-ethylene Copolymer emulsion resin (Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-
473, glass transition temperature 0 ° C.) 45 parts and a cationic polymer resin (manufactured by Nikka Chemical Co., Ltd., trade name: Neofix E)
-117) 20 parts were mixed and stirred to obtain a paint for an ink receiving layer. The above coating material was applied on the undercoat layer with a bar coater so that the coating amount after drying was 20.0 g / m ^2, and dried at 110 ° C. to obtain an inkjet recording sheet.

Example 3 As a synthetic resin film, a polyethylene terephthalate film (trade name: TG98, manufactured by Sumika Plastics Co., Ltd.)
C) was used.

The amount of the coating for the undercoat layer of Example 1 after drying on one side of the synthetic resin film was 4.0 g / g.
It was applied with a bar coater so as to obtain m ² and dried at 110 ° C. The ink receiving layer was applied on the surface of the undercoat layer. The coating composition of the ink receiving layer was composed of 50 parts of amorphous synthetic silica (trade name: Silojet P-616, particle size 12 μm, manufactured by Grace Japan), amorphous synthetic silica (trade name, manufactured by Grace Japan) : Silojet P-405, particle size 3.5 μm) 50 parts, water-soluble polymer resin: silanol-modified polyvinyl alcohol (manufactured by Kuraray Co., trade name: R-1130) 45 parts, water-insoluble synthetic resin: vinyl acetate-ethylene Copolymer emulsion resin (Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-
473, glass transition temperature 0 ° C.) 15 parts and a cationic polymer resin (manufactured by Nikka Chemical Co., Ltd., trade name: Neofix E)
-117) 20 parts were mixed and stirred to obtain a paint for an ink receiving layer. The above coating material is applied on the undercoat layer so that the coating amount after drying is 24.0 g / m ² ,
An inkjet recording sheet was obtained.

Example 4 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, a glass transition temperature of 0 ° C.) was added to 30 parts of a vinyl acetate-ethylene copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-752, glass transition temperature: 15).
° C) An ink jet recording sheet was prepared in the same manner as in Example 1 except that the amount was changed to 30 parts.

Example 5 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, glass transition temperature 0 ° C.) except that 30 parts was changed to 30 parts of vinyl acetate-ethylene-vinyl chloride copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-850, glass transition temperature 30 ° C.). In the same manner as in Example 1, an ink jet recording sheet was prepared.

Example 6 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, a glass transition temperature of 0 ° C.) was mixed with 30 parts of a styrene-acrylic copolymer emulsion resin (manufactured by Showa Polymer Co., Ltd .;
Polysol AM-300, glass transition temperature 18 ° C) 30
A sheet for ink jet recording was prepared in the same manner as in Example 1, except that the parts were changed to parts.

Example 7 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
Example 1 except that 30 parts of a glass transition temperature of 0 ° C.) was changed to 30 parts of an acrylic acid ester polymerization emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name: Polysol AM-200, glass transition temperature of 5 ° C.). In the same manner as in the above, an ink jet recording sheet was prepared.

Example 8 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.) which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, a glass transition temperature of 0 ° C.) and 30 parts of a vinyl acetate-ethylene copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-405, glass transition temperature -1)
(8 ° C.) An ink jet recording sheet was prepared in the same manner as in Example 1 except that the amount was changed to 30 parts.

Example 9 A vinyl acetate-ethylene copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-47) which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, 30 parts of glass transition temperature 0 ° C.) and 30 parts of acrylate polymerized emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name: Polysol AM-310, glass transition temperature -28 ° C.) 30
A sheet for ink jet recording was prepared in the same manner as in Example 1, except that the parts were changed to parts.

Comparative Example 1 An ink jet recording sheet was prepared in the same manner as in Example 1 except that a polypropylene-based synthetic film (trade name: Yupo FPG-80, manufactured by Oji Yuka Synthetic Paper) was used as the synthetic resin film. did. When sticking a printed matter to an object having a curved surface, it can be managed by stretching it in the MD direction, but it is difficult to stretch it when stretching it in the CD direction, and it is difficult to stick it with good fit.

Comparative Example 2 A polyolefin-based film (trade name: Hiclever ES-1, 150 μm, manufactured by Hayashi II Co., Ltd.) was used as a synthetic resin film.
m, a three-layer structure of polypropylene / polyethylene / polypropylene) was used to obtain an inkjet recording sheet in the same manner as in Example 1. When sticking a printed matter on an object having a curved surface, considerable care is required for sticking the film with good stretchability and good fit.

Comparative Example 3 A polyethylene terephthalate-based film (manufactured by Sumika Plustech Co., trade name: SH-840) was used as a synthetic resin film.
-1, 100 μm) to obtain an inkjet recording sheet in the same manner as in Example 1. When attaching a printed matter to an object having a curved surface, it is difficult for the film to be stretched and to be attached with good fit.

Comparative Example 4 Polyolefin film (manufactured by Tatsuno Chemical Co., trade name: Midea, Nashiji, Clear, 200 μm) was used as the synthetic resin film.
An ink jet recording sheet was obtained in the same manner as in Example 1, except that m) was used. When sticking a printed matter to an object having a curved surface, it is difficult to stick the film with good stretchability and good fit.

COMPARATIVE EXAMPLE 5 A water-insoluble synthetic resin was prepared by adding 60 parts of silanol-modified polyvinyl alcohol (trade name: R-1130, manufactured by Kuraray Co., Ltd.), which is a water-soluble polymer resin used in the ink receiving layer coating material of Example 1. Was used in the same manner as in Example 1 except that the vinyl acetate-ethylene copolymer emulsion resin (manufactured by Sumitomo Chemical Co., Ltd., trade name: Sumikaflex S-473, glass transition temperature: 0 ° C.) was changed to 0 parts. I got a sheet. When a printed matter is pasted on an object having a curved surface, cracks occur in the recording layer, resulting in poor image quality.

Comparative Example 6 A water-insoluble synthetic resin was prepared by changing the amount of the silanol-modified polyvinyl alcohol (R-1130, manufactured by Kuraray Co., Ltd.), which is the water-soluble polymer resin used in the ink receiving layer coating material of Example 1, to 0 parts. Is a vinyl acetate-ethylene copolymer emulsion resin (Sumitomo Chemical Industries, Ltd., trade name: Sumikaflex S)
-473, glass transition temperature 0 ° C) was changed to 60 parts, and an ink jet recording sheet was obtained in the same manner as in Example 1. Since there is no water-soluble polymer resin in the adhesive, the ink absorbability is poor, and the ink overflows and the image quality becomes dirty.

Example 10 A water-insoluble synthetic resin was prepared by adding 10 parts of silanol-modified polyvinyl alcohol (R-1130, manufactured by Kuraray Co., Ltd.) as a water-soluble polymer resin used in the ink receiving layer coating material of Example 1. Was used in the same manner as in Example 1 except that the vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-473, glass transition temperature: 0 ° C., manufactured by Sumitomo Chemical Co., Ltd.) was changed to 10 parts. I got a sheet.

Example 11 A water-insoluble synthetic resin was prepared by adding 50 parts of silanol-modified polyvinyl alcohol (manufactured by Kuraray Co., Ltd., trade name: R-1130) as the water-soluble polymer resin used in the ink receiving layer coating material of Example 1. For inkjet recording in the same manner as in Example 1 except that the vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-473, glass transition temperature: 0 ° C., manufactured by Sumitomo Chemical Co., Ltd.) was changed to 50 parts. I got a sheet.

Comparative Example 7 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3. Except that 30 parts of 30 parts of glass transition temperature (0 ° C.) was changed to 30 parts of acrylic acid ester polymerization emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name: Polysol M-16-3, glass transition temperature of 40 ° C.). In the same manner as in Example 1, an ink jet recording sheet was prepared. When a printed matter is pasted on an object having a curved surface, cracks occur in the recording layer, resulting in poor image quality.

Comparative Example 8 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.) which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3. 30 parts of a styrene-acrylic copolymer emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name:
Polysol AM-2300, glass transition temperature 67 ° C) 3
An ink jet recording sheet was prepared in the same manner as in Example 1 except that the amount was changed to 0 part. When a printed matter is pasted on an object having a curved surface, cracks occur in the recording layer, resulting in poor image quality.

Comparative Example 9 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.) which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
Example 3 except that 30 parts of a glass transition temperature of 0 ° C.) was changed to 30 parts of an acrylic ester polymerized emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name: Polysol F-361, glass transition temperature of −36 ° C.). In the same manner as in 1, an ink jet recording sheet was prepared. Poor blocking resistance.

Comparative Example 10 A vinyl acetate-ethylene copolymer emulsion resin (trade name: Sumikaflex S-47, manufactured by Sumitomo Chemical Co., Ltd.), which is a water-insoluble resin used in the ink receiving layer coating material of Example 1.
3, glass transition temperature 0 ° C.) 30 parts of an acrylic ester polymerized emulsion resin (manufactured by Showa Polymer Co., Ltd., trade name: Polysol AE-811, glass transition temperature −46 ° C.) 30
A sheet for ink jet recording was prepared in the same manner as in Example 1 except that the number of parts was changed. Poor blocking resistance.

[Evaluation method] (Load when the film was stretched by 2%)
The measurement at the time of elongation is performed in accordance with JIS K 7127, and the measuring instrument is ORIENTEC RTC-1250A.
(Manufactured by E & D) to measure the MD direction and the CD direction. The test speed was 10 mm / min, the shape of the test piece was a No. 1 type test piece, the total length was 200 mm, the width was 15 mm, and the distance between the marking line and the distance between the grippers was 100 mm.

With respect to the various types of ink jet recording sheets obtained in the above Examples and Comparative Examples, their image quality, water resistance of the coating film, and the fit of the synthetic resin film when the recorded image was pasted on an object having a curved surface. And the image quality of the pasted image was evaluated by the following method. Table 1 shows the results.

(Image quality) Ink jet plotter (De
Sign Jet 2500CP: Hewlett-Packard Co., Ltd., and UV ink (Hewlett-Packard Co., Ltd. pigment ink), high-definition color digital standard image (ISO / JIS-S) issued by the Japan Standards Association.
CID) image sample N1 (portlet) was printed, the image was observed, and the image definition was sensory evaluated. 〇: The skin color of the person's face is reproduced, and it is excellent. Δ: Good reproducibility of flesh color part. X: Poor reproducibility.

(Ink Absorption) Using an inkjet plotter (Design Jet 2500CP: manufactured by Hewlett-Packard Company), using UV ink (pigment ink manufactured by Hewlett-Packard Company),
A test pattern in which 0% and 100% of magenta were superimposed (200% multicolored portion) was printed, the printed portion was observed, and the bleeding of the printed portion was sensory evaluated. 〇: Excellent without any bleeding. Δ: Some bleeding, but good. X: There is bleeding and inferior.

(Water Resistance) As an evaluation of water resistance, the state of the coating film when the surface of the coating layer was rubbed 20 times with a cotton swab after immersion in water for one hour was evaluated organoleptically. 〇: The coating layer surface does not peel at all. Δ: good, although slightly peeled. ×: No problem in practical use, but peeled.

(Fitness of Synthetic Resin Film, Workability of Sticking Printed Object on Curved Object and Image Quality of Pasted Image) Silicone resin (Shin-Etsu Chemical Co., Ltd.) was applied to one side of glassine paper having a basis weight of 74 g / m ^2. (Product name: KS-770)
Was applied at a rate of 0.5 g / m ^2, and an acrylic emulsion adhesive (trade name: Nikazol TS-1215, manufactured by Nippon Carbide Co., Ltd., tensile strength 1)
2 kg / cm ² ) was applied at a dry coating amount of 20 g / m ² and dried. Next, on the adhesive layer, the surface opposite to the side on which the ink receiving layer of the ink jet recording sheet of A4 size was provided was overlapped, and the sheets were bonded with a press roll. After performing the inkjet recording on the recording surface of the inkjet recording sheet in the evaluation of the image quality, the image area was 5 cm × 5 cm.
A 10 cm × 10 cm metal plate having a rivet having a head having a diameter of 1 cm and a height of 5 mm in the middle of a metal plate was evaluated as an object having a curved surface. Remove the glassine paper of the ink jet recording sheet, place it on a rivet of an object having a curved surface, appropriately stretch that portion of the ink jet recording sheet, affix it on the rivet, and lift the test piece at the outer periphery of the rivet. Observations were made to evaluate the fit.

(Fitability of Synthetic Resin Film) ：: No cracks in the coating film of the ink receiving layer. Δ: The coating film of the ink receiving layer was slightly cracked. X: The coating film of the ink receiving layer is considerably cracked.

(Blocking Resistance) Twenty test pieces obtained by cutting the produced ink jet recording sheet into 5 cm × 5 cm were superposed on each other so that the coated surface and the back surface were in contact with each other, and 5 kg was added.
After placing the weight on the plate in a constant temperature bath at 40 ° C. for 24 hours, the degree of sticking (blocking) between the test pieces was observed, and the blocking resistance was evaluated.

(Fitness of Synthetic Resin Film) Good: no blocking occurred at all, good. Δ: There is some blocking, but the test piece is peeled off by its own weight. X: Intense blocking has occurred.

(Workability at the time of sticking a printed matter on an object having a curved surface) 〇: The printed matter can be stretched in the MD direction and the CD direction, and can be stuck to an object having a curved surface with good fit. Δ: It is somewhat difficult to stretch the printed matter in the MD and CD directions and to apply it to an object having a curved surface with good fit. X: It is difficult to stretch the printed matter in the MD direction and the CD direction and affix it to an object having a curved surface with good fit.

(Image quality of pasted image) 〇: The synthetic resin film can be pasted with good fit, there is no crack in the ink receiving layer, and the image quality is good. Δ: Synthetic resin film cannot be applied with good fit, resulting in wavy images and poor image quality. X: A part of the ink receiving layer was cracked and the image quality was not good. However, although the printed matter of Comparative Example 6 was pasted with good fit, the ink receiving layer was poor in liquid absorbability, overflowed with ink, and the image quality was poor.

[0062]

[Table 1]

[0063]

[Table 2]

[0064]

As described in detail above, according to the present invention, a printed matter is stuck to an object having a curved surface with good fit, and the ink receiving layer is deformed according to the shape of the object to be stuck. In addition, an ink jet recording sheet having good appearance and excellent water resistance can be obtained, and is extremely practical.

Continued on front page F-term (reference) 2C056 EA13 2H086 BA16 BA19 BA31 BA33 BA35 BA36 BA41 4F006 AA17 AA35 AB20 AB23 AB76 BA01 CA10 DA04

Claims (4)

[Claims] 1. An ink jet recording sheet comprising a synthetic resin film and an ink receiving layer formed on at least one surface of the synthetic resin film.
D) and a load required to displace 2% in the direction perpendicular to the direction (CD) are 0.50 to 2.0 kgf,
In addition, the MD / CD ratio of the load is in the range of 0.70 to 1.3, and the ink receiving layer is made of a water-insoluble synthetic resin having a glass transition temperature of -30 to + 30 ° C as a pigment or an adhesive. An ink jet recording sheet comprising a water-soluble polymer resin and a cationic polymer resin as main components. 2. The ink jet recording sheet according to claim 1, wherein the adhesive is contained in an amount of 20 to 40% by weight based on the total solid content of the ink receiving layer. 3. The content of the water-insoluble synthetic resin in the adhesive ranges from 20 to 80% by weight of the total adhesive.
The sheet for inkjet recording according to the above. 4. The ink receiving layer according to claim 1, wherein an undercoat layer containing a pigment and a water-insoluble binder is provided adjacent to one surface of the synthetic resin film.
4. The ink jet recording sheet according to any one of items 1 to 3,