JPH09142009A - Transparent adhesive sheet for inkjet - Google Patents

Abstract

(57) Abstract: In addition to good color development, an ink receiving layer can be formed in a short treatment time, has high adhesion to a substrate, has a short ink fixing time, It is a resin layer with a strong fastness, which can form a clear and high-resolution image because the coloring material component is strongly dyed, and has a particularly high absorption capacity and absorption speed, and especially satisfies the perfect dyeing property of the coloring material. Provided is a transparent adhesive sheet having an ink receiving layer. A composition containing a polymerizable cationic compound having two or more acryloyl groups and one or more cation groups in a molecule is polymerized on the surface of a flexible substrate having an adhesive layer on the back surface. A transparent adhesive sheet for inkjet is provided with the ink receiving layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent pressure-sensitive adhesive sheet for inkjet having a water-based ink receiving layer, for example, after printing with a water-based printing ink, especially a water-based inkjet ink, it is attached to an object through an adhesive Regarding what to use.

[0002]

2. Description of the Related Art In recent years, the ink jet recording method has made a great progress in the digital recording method, and has been widely spread as an output device from a personal computer used especially in an office.

These are the results of the development of a compact and high-density multi-nozzle ink jet recording head and a precision driving technique for driving the same, and the development of a recording medium having printability that realizes high image quality. Most of the ink jet printers that have become widespread in this way use ink mainly composed of water. Water-based inks are desirable ink-based inks not only in offices but also in industrial fields from the viewpoints of environmental protection and effects on the human body.

The transparent pressure-sensitive adhesive sheet currently available as a recording medium for a printer having the suitability for such an aqueous ink has some basic performance problems as described below, and therefore should be put to practical use. I can't. (1) Since the transparent adhesive sheet developed for thermal transfer recording devices and electrophotography does not have a water-based ink receiving layer, it does not absorb water-based ink at all and does not function as a recording medium. (2) Even if the water-based ink receiving layer used in the water-based inkjet OHP film is used for the transparent adhesive sheet, not only the water resistance of the sheet itself and the water resistance of the image are still extremely insufficient, but also used. Special attention needs to be paid to the environment and storage environment.

These problems result from the use of a water-soluble polymer compound as a material because it is necessary to impart a high-speed absorbability to an aqueous ink. In designing a recording medium for water-based inks, water resistance as a receptive layer was necessarily considered to be a subject of ink receptivity, absorption and trade-off.

On the other hand, with the rapid spread of ink jet printers, conventionally, there has been a long-awaited demand for a transparent adhesive sheet which is already available for thermal transfer and electrophotography and which can be printed by an ink jet printer. With this transparent adhesive sheet, beautiful labels, stickers, etc. can be easily created with a (color) inkjet printer on hand.

In this application, when an aqueous ink is used, it is necessary to previously form an ink absorbing layer.

However, the conventional coating materials for OHP films designed for ink jet as described above cannot meet the practical requirements as a printing substrate only by coating them. The main reason for this is that the adhesion to the substrate, the suitability for coating, the durability of the coating film, and the water resistance and scratch resistance of the coating film are very insufficient.

The performance required for the ink jet receiving layer coating material required for the transparent adhesive sheet as described above is that (a) the ink receiving layer can be formed by a short-time treatment together with (a) an ink receiving layer. High adhesion to the substrate, (c) Short fixing time of ink, (d)
The coloring material components (dye, pigment) in the ink are strongly dyed, and (e) clear and high-resolution images can be formed.
(F) It is considered that the resin layer has high fastness.

[0010]

As described above, the conventional ink-receiving layer material for ink jet has a lack of performance in the first place, and it is almost difficult to convert it into a transparent adhesive sheet. Conceivable. One of the objects of the present invention is to solve these trade-off problems.

On the other hand, for the purpose of satisfying many of the performance requirements (a) to (f), a technique for forming an ink jet receiving layer by ultraviolet curing has been proposed in the past (Japanese Patent Laid-Open No. 1-286886, etc.). ).

However, the conventional ink jet receiving layer using the water-soluble acrylic ester type photosensitive resin does not particularly satisfy the perfect dyeing property of the coloring material.

That is, the object of the present invention is to satisfy the above-mentioned required performances (a) to (f) required for the ink receiving layer, particularly high absorbing ability and absorbing speed, and particularly to satisfy the perfect dyeing property of the coloring material. Another object is to provide a transparent adhesive sheet having an ink receiving layer.

[0014]

Means for Solving the Problems The present invention provides a polymerizable resin having two or more acryloyl groups and one or more cation groups in the molecule on the surface of a flexible substrate having an adhesive layer on the back surface. Composition containing cationic compound (ink receiving layer composition)
There is provided a transparent adhesive sheet for inkjet, which is provided with an ink receiving layer formed by polymerizing.

Here, the ink-receiving layer has a cationic polypolysiloxane represented by any of the following general formulas (1) to (6), which has two or more acryloyl groups and one or more cation groups in the molecule. It is preferable to contain an acryloyl compound.

[0016]

Embedded image Z ¹ (K ¹ −R ¹ ) (K ¹ −R ¹ ) ... (1)

[0017]

Embedded image Z ² (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ -R ¹ ) ... (2)

[0018]

Embedded image Z ₃ (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ -R ¹ ) ... (3)

[0019]

Embedded image Z ⁴ K ² R ² ₂ (4)

[0020]

Embedded image Z ₅ K ² ₂ R ² ₂ (5)

[0021]

Embedded image Z ₆ K in ² R ² ₃ ··· (6) above formulas, Z ¹ to Z ⁶ represents a reaction residual group of a polyhydric alcohol or a polyepoxide, K ¹ are each independently,

[0022]

Embedded image —CH ₂ —N ⁺ (CH ₃ ) ₂ —CH ₂ — or

[0023]

Embedded image represents —CH ₂ —N ⁺ (CH ₃ ) ₂ —, and K ² is

[0024]

Embedded image represents —N ⁺ (CH ₃ ) ₃ and each R ¹ independently represents

[0025]

CH ₂ ═C (R ³ ) COOCH ₂ —

[0026]

CH ₂ ═C (R ³ ) COOCH ₂ CH ₂ —

[0027]

CH ₂ ═C (R ³ ) CONHCH ₂ —

[0028]

CH ₂ ═C (R ³ ) CONHCH ₂ CH ₂ —

[0029]

Embedded image CH ₂ ═C (R ³ ) CONHCH ₂ CH (OH) — or

[0030]

Embedded image CH ₂ ═C (R ³ ) CO— (In the above formula, each R ³ independently represents H or CH _3. )
And R ² is each independently CH ₂ ═CHCOO— or C
H ₂ = C (CH ₃₎ represents the COO-.

Further, it is preferable that the ink receiving layer contains a polymerization initiator that can be activated by an energy ray.

Further, the ink receiving layer composition preferably contains a photopolymerizable compound having two or more acryloyl groups in one molecule and no cationic group.

Further, the ink receiving layer composition preferably contains a water-insoluble and hydrophilic polymer.

The water-insoluble and hydrophilic polymer is preferably an acrylic polymer obtained by copolymerizing 20 to 75 mol% of a hydrophilic acrylamide monomer.

The present inventors have adapted to the performance of, for example, an inkjet receptive layer, in particular, an inkjet color printer which has recently become widespread, and have the above-mentioned required performances (a) to (f), particularly high absorption capacity and absorption speed. As a result of research on a recording layer constituent material for a water-based inkjet ink for satisfying a perfect dyeing property of a coloring material, the cationic polyacryloyl compound of the general formulas (1) to (6) is very good. It was found that the present invention has various operational effects and that many of the required performances are satisfied, and the present invention has been completed.

That is, the present invention is an invention relating to a transparent adhesive sheet coated with a UV-curable material, wherein two or more acryloyl groups contained in the compounds of the general formulas (1) to (6) are mainly UV-curable. One or more cationic groups possessed by this compound act as a site to which the dye or pigment dispersion is dyed. As a result of the synergistic effect of these actions, the ink receiving layer composition of the present invention containing this compound is substantially solid in a short time after being applied to the substrate by irradiation with ultraviolet rays, electron beams, etc. and has excellent dyeing property. Forming an ink receiving layer. Further, the compounds of the general formulas (1) to (6) (cationic polyacryloyl compounds) used in the present invention are novel compounds which the present inventors independently synthesized based on the above research.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.

The basic component constituting the composition of the present invention is any one of the above general formulas (1) to (6) having two or more acryloyl groups and one or more cation groups in the molecule. It is a cationic polyacryloyl compound represented.
Examples of the synthetic method of this compound include the following synthetic routes. Synthetic Route 1 A polyepoxide having two or more epoxy groups is reacted with an acrylic monomer having a tertiary amine. Synthetic Route 2 At least one epoxy group of a polyepoxide having n (≧ 3) epoxy groups is reacted with a trialkylamine such as trimethylamine to be cationized, and the remaining m (m ≧ 2) epoxy groups are converted to (meta). ) React with acrylic acid. Synthetic Route 3 At least one acryloyl group of a photopolymerizable polyacryloyl compound having k (k ≧ 3) acryloyl groups is bound to at least one acryloyl group by a Michael addition reaction to be cationized to form h (h ≧ 2) Acryloyl group and k
A compound having 4 cationic groups. Synthetic route 4 A cationizing agent is reacted with a hydroxyl group of a polyacryloyl compound having one or more hydroxyl groups to be cationized.

[0039]

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[0040]

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[0041]

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[0042]

Embedded image Which of the above synthetic routes should be selected may be determined in consideration of the structure and purity of the raw material and the target compound structure.

The polyepoxides used in Synthesis Routes 1 and 2 are exemplified here.

[0044]

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[0045]

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[0046]

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[0047]

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[0048]

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[0049]

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[0050]

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[0051]

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[0052]

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[0053]

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[0054]

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[0055]

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[0056]

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[0057]

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[0058]

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[0059]

Embedded image Substances other than polyglycidyl ether as shown above,
The compounds of the general formulas (1) to (6) used in the present invention can be basically synthesized from compounds having more glycidyl groups. Examples of commercially available substances of polyfunctional epoxide include Denacol EX-810 and Denacol EX-81.
1, Denacol EX-851, Denacol EX-83
0, Denacol EX-832, Denacol EX-84
1, Denacol EX-861, Denacol EX-91
1, Denacol EX-941, Denacol EX-92
0, Denacol EX-921, Denacol EX-93
1, Denacol EX-211, Denacol EX-21
2, Denacol EX-221, Denacol EX-72
1, Denacol EX-313, Denacol EX-321
(These are trade names, Nagase Chemicals Co., Ltd., etc.)

Next, an acrylic monomer having a tertiary amine used in Synthesis Route 1 will be illustrated. N, N-dimethylaminoethyl methacrylate

[0061]

Embedded image CH ₂ ═C (CH ₃ ) —COO—CH ₂ CH ₂ N (CH ₃ ) ₂ N, N-dimethylaminoethyl acrylate

[0062]

Embedded image CH ₂ ═CH—COO—CH ₂ CH ₂ N (CH ₃ ) ₂ N, N-dimethylaminopropyl methacrylate

[0063]

CH ₂ ═C (CH ₃ ) —COO—CH ₂ CH ₂ C
_{H 2 N (CH 3) 2} N, N- dimethylaminopropyl acrylate

[0064]

Embedded image CH ₂ ═CH—COO—CH ₂ CH ₂ CH ₂ N (CH ₃ ) ₂ N, N-dimethylaminoacrylamide

[0065]

CH ₂ = CH-CON (CH ₃ ) ₂ N, N-dimethylaminomethacrylamide

[0066]

CH ₂ = C (CH ₃ ) -CON (CH ₃ ) ₂ N, N-dimethylaminoethylacrylamide

[0067]

CH ₂ ═CH—CONHC ₂ H ₄ N (CH ₃ ) ₂ N, N-dimethylaminoethylmethacrylamide

[0068]

Embedded image CH ₂ ═C (CH ₃ ) —CONHC ₂ H ₄ N (CH ₃ ) ₂ N, N-dimethylaminopropyl acrylamide

[0069]

CH ₂ ═CH—CONH—C ₃ H ₆ N (CH ₃ ) ₂ N, N-dimethylaminopropyl methacrylamide

[0070]

CH ₂ ═C (CH ₃ ) —CONH—C ₃ H ₆ N (CH ₃ ) ₂ N, N-dimethylamino 2-hydroxypropyl acrylamide

[0071]

CH ₂ ═CH—CONH—CH ₂ CH (OH)
CH ₂ N (CH ₃ ) ₂ N, N-dimethylamino 2-hydroxypropylmethacrylamide

[0072]

Embedded image CH ₂ = C (CH ₃₎ one CONH-CH ₂ CH
(OH) CH ₂ N (CH ₃ ) _{2 The} compound having 3 or more acryloyl groups in one molecule used in Synthesis Route 3 is a polyol composed of 3 or more hydroxyl groups such as trimethylolpropane triacrylate. (Meth) acrylic acid ester, (meth) acrylic acid ester of polyepoxide consisting of three or more epoxides can be used. Examples of the polyol having three or more hydroxyl groups include glycerin, trimethylolpropane, pentaerythritol, dipentaerythritol, polyglycerin, 1,2,6-hexanetriol, 1,3,5-pentanetriol, 1,2,5.
-Pentanetriol, 1,2,4-butanetriol, trishydroxyethyl isocyanurate, sugar alcohols and the like.

The polyacryloyl compound having one or more hydroxyl groups used in Synthesis Route 4 is a partial (meth) acrylic acid ester of the above-mentioned polyol, an acrylic acid ester of the above polyglycidyl ether (commercially available as
Epoxy acrylates) as a group of photopolymerizable oligomers are used. As the cationizing agent used in Synthesis Route 4, a compound having both a glycidyl group and a cation group, such as WYSTEX E-100 or WYSTEX N-50 (trade name, Nagase Kasei Co., Ltd.) is a substance to which the application is applied. As.

The general formulas (1) to (6) of the present invention are also
As a synthetic route for the compound (1), a route for reacting a compound having two or more halomethyl groups at the molecular end with a tertiary amine monomer is also possible. However, industrially, there are very few compounds having two or more chloromethyl groups at the molecular ends, and it is convenient to use the water-soluble polyepoxide described above.

The compounds of the general formulas (1) to (6), which are the basic components constituting the composition of the present invention described above, are contained in the composition as a constituent material of the ink receiving layer, In the case of exhibiting the effects of the compound such as ultraviolet curability and dyeing property, the content thereof is not particularly limited, and the optimum composition ratio of the composition depending on desired performance, film forming method, etc. May be selected appropriately.

However, the compounds of the general formulas (1) to (6) are preferably contained in the composition in an amount of 25% by weight or more, and more preferably 50% by weight or more, in order to exhibit the above effects well. Make sure it is included. In many more preferable examples, the content is 55% by weight to 98% by weight. <Polymerization Initiator> The ink receiving layer composition of the present invention further comprises
It may contain an initiator that can be activated by active energy rays. Such polymerization initiators are represented by general formulas (1) to (6)
If mixed with the cationic polyacryloyl compound of
The polymer solid layer (ink receiving layer) can be formed in a short time by irradiating with ultraviolet rays or the like.

Examples of the polymerization initiator include 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1
-(4-Isopropylphenyl) -2-hydroxy-2
-Methylpropan-1-one, 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 2-methyl-1- [ 4- (Methylthio) phenyl] -2-morpholinopropane-1,4
-Acetophenones such as phenoxydichloroacetophenone, 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone, pt-butyldichloroacetophenone, pt-butyltrichloroacetophenone, and p-dimethylaminoacetophenone Benzoin methyl ether, benzoin ethyl ether,
Benzoin ethers such as benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, and benzyl dimethyl ketal; benzophenone, benzophenone methyl ether, benzoylbenzoic acid, methyl benzoylbenzoate, hydroxybenzophenone, 4-phenylbenzophenone, 3,3 ′ −
Dimethyl-4-methoxybenzophenone, 3,3-bis (N, N-dimethylamino) benzophenone, 4,4-
Bis (N, N-diethylamino) benzophenone,
4 ', 4 "-diethylisophthalophen, 3,3',
Benzophenones such as 4,4′-tetra (t-butyl-oxycarbonyl) benzophenone, 4-benzoyl-4-methyldiphenylsulfide, acrylated benzophenone; thioxanthone, 2-methylthioxanthone, isopropylthioxanthone, 2,4-dimethylthioxanthone , 2,4-Jetylthioxanthone, 2,
Xanthones such as 4-diisopropylthioxanthone, 2-chlorothioxanthone, and 2,4-dichlorothioxanthone; diketones such as diacetyl and benzyl; 2-ethylanthraquinone, 2-t-butylanthraquinone,
Quinones such as 2,3-diphenylanthraquinone, 1,2-benzanthraquinone, octamethylanthraquinone, camphorquinone, dibenzosuberone and 9,10-phenanthrenequinone. Also, CGI170, which has a visible light sensitivity and is suitable as an initiator suitable for a white pigment system, is used.
No. 0, CGI149 (trade name, blend product based on bisacylphosphine oxide, manufactured by Ciba-Gaigi Co., Ltd.) and the like are also useful in the dispersion system.

The content of this polymerization initiator is represented by the general formula (1)
1 to 10 parts by weight is preferable per 100 parts by weight of the compound of (6) to (6), and when a compound other than the compounds of the general formulas (1) to (6) is used in combination, the total solid content is 100 parts by weight. About 1 part by weight to 10 overlapping parts is preferable. <Acrylic Photopolymerizable Compound> The ink receiving layer composition of the present invention comprises a photopolymerizable compound having two or more acryloyl groups in one molecule and no cation group, that is, various conventionally known acrylic compounds. A photo-polymerizable compound may be further contained. This conventional acrylic photopolymerizable compound does not have a dyeing property because it does not have a cationic group, but it controls the balance of hydrophilicity and hydrophobicity of the solid layer (ink receiving layer) itself and adheres to the substrate. It is useful for improving the physical properties and adjusting the physical properties of the solid layer (hardness, flexibility). When the ink receiving layer is formed only by the polymerizable monomer having a cationic group,
For example, the layer may be so hydrophilic that curling of the substrate may occur. The combined use of an acrylic photopolymerizable compound having no cationic group is effective in controlling such properties.

The acrylic photopolymerizable compound having no cationic group is, for example, polyvalent alcohol, glycol, polyethylene glycol, polyester polyol, polyether polyol, urethane-modified, which is widely used as a photopolymerizable oligomer. (Meth) acrylic acid esters such as polyether or polyester,
Examples thereof include (meth) acrylic acid ester of epoxy resin.

Specific examples include ethylene glycol di (meth) acrylate and propanediol di (meth) acrylate.
Acrylate, butanediol di (meth) acrylate, pentanediol di (meth) acrylate, hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, hydroxypivalic acid neopentyl glycol di (meth) acrylate, polyethylene glycol di (Meth) acrylate, polypropylene glycol di (meth) acrylate, polytetrafuran glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, polyester or Polyurethane (meth) acrylates: Trade name Aronix M-1100, Aronix M-120
0, Aronix M-6100, Aronix M-62
00, Aronix M-6250, Aronix M-6
300, Aronix M-6400, Aronix M-
710-0, Aronix M-8030, Aronix M-8100 (all manufactured by Toagosei Kagaku Kogyo Co., Ltd.), Kayarad DPCA-120, Kayarad DPCA-2.
0, Kayarad DPCA-30, Kayarad DPCA-
60, Kayarad R-526, Kayarad R-629,
There is Kayarad R-644 (all manufactured by Nippon Kayaku Co., Ltd.).

Specific examples of compounds derived from epoxy resins include 1,6-hexanediol diglycidyl ether di (meth) acrylate, trimethylolpropane triglycidyl ether tri (meth) acrylate and glycerin triglycidyl ether. Two or more molecules per molecule such as tri (meth) acrylate, isocyanuric acid triglycidyl ether tri (meth) acrylate, (meth) acrylic acid ester of novolac type epoxy resin, and (meth) acrylic acid ester of bisphenol type epoxy resin. (Meta) of compound having epoxy group
Acrylic esters: trade name Denacol acrylate DM-201, DM-811, DM-851, DM-8
32, DA-911, DA-920, DA-931, D
A-314, DA-701, DA-721, DA-72
2, (these are manufactured by Nagase Kasei Co., Ltd.) and the like.

The content of the acrylic photopolymerizable compound having no cationic group is preferably about 10 parts by weight to 200 parts by weight per 100 parts by weight of the compounds of the general formulas (1) to (6).

In addition to these polyfunctional monomers,
For the purpose of adjusting the viscosity to a low level, a monofunctional monomer having a tertiary amine and a quaternary ammonium can be used. Examples of these include all the substances mentioned above as monomers for cationization. <Water-insoluble and hydrophilic polymer> The ink receiving layer composition used in the transparent adhesive sheet of the present invention may further contain a water-insoluble and hydrophilic polymer. By including this water-insoluble and hydrophilic polymer, the amount and speed of ink absorption of the ink receiving layer can be adjusted. A specific example of this polymer is a water-insoluble hydrophilic acrylic polymer obtained by copolymerizing a hydrophilic acrylamide monomer in an amount of 20 to 75 mol% in the copolymer. If the amount of acrylamide monomer is 20 mol% or less, the ink absorption amount is small, the absorption speed is slow, and problems occur in fixing. If it is 75% or more, the ink absorption amount is sufficient and the absorption speed is sufficient, but the sheet There is a problem in water resistance. <Support film> The support used for the transparent adhesive sheet of the present invention includes, for example, polyethylene terephthalate, cellulose acetate, polycarbonate, polyvinyl chloride, polystyrene, polysulfone, and aliphatic polyester film.

The pressure-sensitive adhesive applied to the back surface of the support film may be a commonly used pressure-sensitive adhesive such as an acrylic pressure-sensitive adhesive, a silicon rubber-based pressure-sensitive adhesive, a butyl rubber-based pressure-sensitive adhesive. <Method for producing transparent adhesive sheet for inkjet> The transparent adhesive sheet for inkjet of the present invention is produced by the following procedure. 1) A pressure sensitive adhesive is applied to a coating sheet base material selected from the above support films and dried. 2) A separator having releasability is laminated on the adhesive layer. As the separator, a polyethylene resin-coated polyethylene terephthalate film or paper,
Paper coated with polyethylene wax is used. 3) The ink receiving layer composition of the present invention is applied to the surface of the sheet substrate. As a coating method, a normal mouth coater,
A spray coater is used. 4) Dry to evaporate the organic solvent. Drying is
It is performed in the range of 50 ° C to 120 ° C for 3 minutes to 10 minutes. 5) Polymerize the receptor layer by irradiating it with ultraviolet rays or electron beams.
Let it cure. 6) If necessary, overlay or laminate a slip sheet on the ink receiving layer.

As described above, the transparent adhesive sheet for inkjet of the present invention is produced. Needless to say, a product having the same form and performance can be manufactured by using an existing sheet having a back surface coated with an adhesive and laminating only the ink receiving layer on the front surface.

Finally, the constitution of the transparent adhesive sheet for inkjet of the present invention is shown in FIGS. 1 and 2.

In FIGS. 1 and 2, 1 is an ink receiving layer, 2 is a substrate, 3 is an adhesive layer, and 4 is a separator.

[0088]

The present invention will be described in more detail with reference to the following examples. In the following description, “part” is based on weight unless otherwise specified.

Example 1 A composition having the following composition was prepared.
MYTAC film sheet MLF-A4T3 (Nichiban
Co., Ltd.) with a bar coater and 3 minutes at 70 ℃
It was dried to give a layer having a dry thickness of about 10 μm. This film
150 mJ / cm from high pressure mercury lamp ^Two(365n
m) (ultra-light amount) ultraviolet light to polymerize and receive ink
It was made a layer.Composition of composition used -Polyethylene glycol diglycidyl having a molecular weight of about 400 reacted with dimethylaminoethyl acrylate (by synthesis route 1) ... 6 parts-Polyglycerin polyglycidyl ether sequentially reacted with trimethylamine and acrylic acid (synthesis) According to Route 2) ... 10 parts N-methylol acrylamide / 2-hydroxyethyl methacrylate / methyl methacrylate = 50/30/20 (mol%) copolymer (weight average molecular weight 56000) methyl cellosolve / MEK ( 1 to 1) 25% solution ... 90 parts CGI-1700 [photopolymerization initiator manufactured by Nippon Ciba Geigy] ... 3 parts MEK, methyl cellosolve 1: 1 solvent ... 15 parts Then, for this film , Bubble jet printer
-BJC400J (trade name; manufactured by Canon) in color
The results were shown in Table 1 below.

Example 2 Polyethylene glycol diglycidyl having a molecular weight of about 400 was reacted with dimethylaminoethyl acrylate (according to synthesis route 1) ... 20 parts N-methylol acrylamide / 2-hydroxyethyl methacrylate / Methyl methacrylate = 50/30/20 (mol%) copolymer (weight average molecular weight 56000) of methyl cellosolve / MEK (1: 1) 25% solution ... 80 parts-CGI-1700 [photopolymerization Initiator manufactured by Ciba-Geigy Co., Ltd.] ・ ・ ・ 3 parts ・ MEK, methyl cellosolve 1 = 1 solvent ・ ・ ・ 15 parts by using a composition consisting of MYTAC film sheet MLFA
4T3 (manufactured by Nichiban Co., Ltd.) was coated with a bar coater and dried at 70 ° C. for 3 minutes to form a layer having a dry thickness of about 10 μm. 150mJ in total from high pressure mercury lamp on this film
/ Cm ² (amount of light near 365 nm) was irradiated and polymerized to form an ink receiving layer.

Then, color printing was performed on this film with a Canon bubble jet printer BJC400J, and the results shown in Table 1 below were obtained.

Example 3 Polyethylene glycol diglycidyl having a molecular weight of about 400 was reacted with dimethylaminoethyl acrylate (according to synthesis route 1) ... 10 parts N-methylol acrylamide / 2-hydroxyethyl methacrylate / Methyl cellosolve / MEK (1 to 1) 25% solution of copolymer (weight average molecular weight 5 6000) of methyl methacrylate = 50/30/20 (mol%) ... 90 parts CGI-1700 [photopolymerization initiation Agent Japan Ciba-Geigy Co., Ltd.] 3 parts MEK, Methyl Cello-Sorob 1: 1 solvent.
4T3 (manufactured by Nichiban Co., Ltd.) was coated with a bar coater and dried at 70 ° C. for 3 minutes to form a layer having a dry thickness of about 10 μm. 150mJ in total from high pressure mercury lamp on this film
/ Cm ² (amount of light near 365 nm) was irradiated and polymerized to form an ink receiving layer.

Color printing was then performed on this film with a Canon bubble jet printer BJC400J, and the results shown in Table 1 below were obtained.

[0094]

[Table 1]

[0095]

EFFECTS OF THE INVENTION According to the present invention described above, it is suitable for the performance of an ink jet printer and has a good color-developing property, and 1) the ink receiving layer can be formed in a short period of time. High adhesion, 3) Short fixing time with ink, 4) Strong adhesion of color material components (dye, pigment) in ink, 5) Formation of clear and high-resolution images, And 6) a transparent pressure-sensitive adhesive sheet having an ink-receptive layer composition that has required properties such as a resin layer having high fastness, particularly high absorption capacity and absorption speed, and particularly satisfies complete dyeing property of a coloring material. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing an example of the configuration of a transparent adhesive sheet for inkjet of the present invention.

FIG. 2 is a schematic cross-sectional view showing another example of the configuration of the transparent adhesive sheet for inkjet of the present invention.

[Explanation of symbols]

 1 Ink Receptive Layer 2 Base Material 3 Adhesive Layer 4 Separator

Claims (6)

[Claims] 1. A composition containing a polymerizable cation compound having two or more acryloyl groups and one or more cation groups in the molecule on the surface of a flexible substrate having an adhesive layer on the back surface ( A transparent pressure-sensitive adhesive sheet for inkjet, which is provided with an ink receiving layer formed by polymerizing an ink receiving layer composition). 2. A cationic polyacryloyl represented by any of the following general formulas (1) to (6), wherein the ink receiving layer has two or more acryloyl groups and one or more cation groups in the molecule. The transparent adhesive sheet for inkjet according to claim 1, which contains a compound. Embedded image Z ¹ (K ¹ -R ¹ ) (K ¹ -R ¹ ) ... (1) embedded image Z ² (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ − R ¹ ) ... (2) embedded image Z ₃ (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ -R ¹ ) (K ¹ -R ¹ ) ... (3) Chemical formula ⁴ Z ⁴ K ² R ² ₂ (4) Chemical formula ₅ Z ₅ K ² ₂ R ² ₂ (5) Chemical formula ₆ Z ₆ K ² R ² ₃ (6) [In the formula, Z ^{1 to} Z ⁶ represent a reaction residue of a polyhydric alcohol or a polyepoxide, and K ¹ is independently of the formula: —CH ₂ —N ⁺ (CH ₃ ) ₂ —CH ₂ — Alternatively, embedded image represents —CH ₂ —N ⁺ (CH ₃ ) ₂ —, K ² represents embedded image —N ⁺ (CH ₃ ) _3, and each R ¹ independently represents CH ₂ ═C (R ³ ) COOCH ₂ — embedded image CH ₂ ═C (R ³ ) COOCH ₂ CH ₂ — embedded image CH ₂ ═C ( R ³⁾ CONHCH ₂ - embedded image ^{_{CH 2 = C (R 3)}} CONHCH 2 CH 2 - embedded image ^{_{CH 2 = C (R 3)}} CONHCH 2 CH (OH) - or embedded image CH ₂ = C (R ³ ) CO— (In the above formula, each R ³ independently represents H or CH _3. )
And R ² is each independently CH ₂ ═CHCOO— or C
H ₂ = C (CH ₃₎ represents the COO-. ] 3. The ink receiving layer contains a polymerization initiator which can be activated by an active energy ray.
The transparent adhesive sheet for inkjet as described above. 4. The transparent pressure-sensitive adhesive sheet for inkjet according to claim 2, wherein the ink receiving layer composition contains a photopolymerizable compound having two or more acryloyl groups in one molecule and no cationic group. 5. The transparent adhesive sheet for inkjet according to claim 1, wherein the ink receiving layer composition contains a water-insoluble and hydrophilic polymer. 6. The transparent pressure-sensitive adhesive sheet for inkjet according to claim 5, wherein the water-insoluble hydrophilic polymer is an acrylic polymer obtained by copolymerizing a hydrophilic acrylamide monomer in an amount of 20 to 75 mol%.