JP2002356079A - Re-peelable sheet for carrying information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a re-peelable sheet for carrying information which is excellent in ink-jet ink absorbing properties, enables improvement of the water resistance of printed ink, prevents blurring of a printed image and enables improvement of a print quality. SOLUTION: The sheet for carrying information has a constitution wherein an adhesive layer not adhering in an ordinary state is formed by applying a pressure-sensitive adhesive composition to prescribed parts of the sides of a base to be laid on each other and these sides of the base are adhered peelably to each other by bringing them into opposite contact with each other and applying a prescribed pressure thereto. An ink-jet ink receiving layer is formed beforehand in a prescribed part of the adhesive layer of the base and/or of the layer other than the adhesive layer, by using the ink prepared by blending at least porous particles with a vehicle containing a specific solvent or an acrylic photosetting constituent as a main constituent or the ink prepared by blending further a cationic resin therewith.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a releasable information-carrying sheet, and more particularly, to a foldable sheet or a confidential sheet such as a superimposed sheet in which a surface superposed by folding or cutting is used as an information-carrying surface. The present invention relates to a releasable information carrying sheet such as a releasable information transmitting postcard having resiliency.

[0002]

2. Description of the Related Art Conventionally, a releasable information-carrying sheet that carries information on a superimposed surface usually has a pattern such that the superimposed surfaces are in contact with each other when they are superimposed. The entire surface or a specific part of the superposed surface,
Alternatively, an adhesive layer of a pressure-sensitive adhesive is provided linearly.
This pressure-sensitive adhesive is also referred to as a self-adhesive pressure-sensitive adhesive, and is a type in which polymers are adhered to each other by self-diffusion by applying a high pressure while the adhesive layers are in contact with each other. Depending on the type of object and the degree of pressure, permanent adhesiveness and removable adhesiveness are realized.

On the other hand, an ink-jet printer using an ink-jet ink has many advantages such as easy colorization, low cost, high resolution, and excellent storage stability. Attempts have been made to print the information carrying sheet on the adhesive layer of the base material or on a predetermined portion other than the adhesive layer (for example, a variable information printing portion for writing various information such as an address printing portion) using inkjet ink. Inferior in ink fixability, the printed ink remains on the surface, there is a problem that the guide roll is stained in the case of continuous printing, stains on the printed image occur, and ink jet printing is blurred, There was a problem of poor water resistance.

In particular, when used in the information industry, an ink-jet printed bar code or the like is blurred and difficult to read, or an ink-jet printed information carrying sheet (mail) is exposed to rain outdoors, or For example, when water is accidentally applied, there is a problem that the printed content becomes invisible due to melting.

When a pigment type ink jet ink is used to improve the water resistance of the ink jet printing, the water resistance is improved, but there is a problem that the ink jet printer head is clogged and the workability is reduced.

On the other hand, paper (ink-jet paper) or film (OHP film) having an ink-jet ink receiving layer formed thereon has been devised (Japanese Patent Application Laid-Open No. 6-18313).
No. 5, JP-A-6-297830, Japanese Patent Publication No. Hei 8-297.
22608, JP-A-8-72390, JP-A-8-291496, etc.). However, forming an ink-jet ink receiving layer improves ink absorbency, but has a problem in that the cost is high because the ink-jet ink receiving layer is provided on the entire surface of the base material. There was a problem that there was no.

In addition to ink jet printing, there is a method of printing with toner in an electrophotographic system. However, the electrophotographic system is not suitable for color printing, and color printing is often performed on the variable information printing portion of the adhesive layer. Since the color printing of the variable information printing unit and the black printing of the address printing unit are performed by separate printers, there is a problem that workability is reduced.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems, to improve the ink-jet ink absorbency, to improve the water resistance of the printed ink-jet ink, and to prevent bleeding of the printed image. By providing a releasable information carrying sheet in which an ink jet ink receiving layer capable of improving the printing quality of ink jet printing is formed on a predetermined portion (a variable information printing portion such as an address printing portion) of the base material by offset printing or the like. is there.

[0009]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that an ink in which porous particles are blended with a specific vehicle or an ink in which a cationic resin is further blended is used. The present inventors have found that the problem can be solved by forming the ink-jet ink receiving layer on the adhesive layer of the base material or on a predetermined portion other than the adhesive layer using the same, and have completed the present invention.

[0010] That is, the removable information-carrying sheet according to claim 1 of the present invention applies the pressure-sensitive adhesive composition to a predetermined portion of the superposed surface of the substrate to form an adhesive layer that does not adhere in a normal state. An information carrying sheet for adhering the superposed surfaces in a releasable manner by bringing the superposed surfaces into contact with each other and applying a predetermined pressure, wherein the adhesive layer and / or the adhesive layer of the base material are provided. Other than the boiling point 100
It is formed using an ink containing at least porous fine particles or an ink further containing a cationic resin in a vehicle containing a glycol-based solvent as a main component or a vehicle containing an acrylic photocurable component as a main component at a temperature of at least ℃. Characterized by having an inkjet ink receiving layer.

According to a second aspect of the present invention, there is provided the releasable information-carrying sheet according to the first aspect, wherein the porous fine particles are contained in an amount of 2 to 70 parts by mass with respect to 100 parts by mass of the vehicle. And 5 to 120 parts by mass of a cationic resin.

According to a third aspect of the present invention, there is provided the removable information-carrying sheet according to the first or second aspect, wherein the predetermined portion is a variable information printing portion. And

The releasable information-carrying sheet of the present invention provides an adhesive layer and / or an adhesive layer for a substrate using an ink in which porous particles are mixed with a specific vehicle or an ink in which a cationic resin is further mixed. Since the ink-jet ink receiving layer is formed in a predetermined portion other than the predetermined portion (a variable information printing portion such as an address printing portion), the ink-jet ink absorbability is excellent, the water resistance of the printed ink-jet ink can be improved, and the printed image can be printed. The printing quality of ink jet printing can be improved without bleeding. Since the ink used in the present invention has excellent printability, an ink-jet ink receiving layer can be easily formed only at a necessary predetermined portion other than the adhesive layer and / or the adhesive layer of the base material, so that the cost can be reduced. In addition, it does not affect offset printing.

[0014]

Embodiments of the present invention will be described below in detail. FIG. 1 is an explanatory view showing one embodiment of a two-fold type releasable information-carrying sheet of the present invention before the superposed surfaces are releasably bonded to each other. FIG. 2 is a cross-sectional explanatory view schematically showing a cross-section in which the releasable information-carrying sheet of the present invention shown in FIG. 1 is folded in two and the superposed surfaces are releasably bonded. FIG. 3 is an explanatory view showing an embodiment of a three-fold type releasable information-carrying sheet of the present invention before the superposed surfaces are releasably bonded to each other.
FIG. 4 is a cross-sectional explanatory view schematically showing a cross section in which the releasable information-carrying sheet of the present invention shown in FIG. 3 is folded in three and the superposed surfaces are releasably bonded.

As shown in FIG. 1, a two-fold type releasable information-carrying sheet 1 of the present invention is prepared by applying a pressure-sensitive adhesive composition to a predetermined portion of a superimposed surface of a base material 2 in a normal state. Then, an adhesive layer 3 that does not adhere is formed, and an ink-jet ink receiving layer 4 is formed on a predetermined portion (a variable information printing portion such as an address printing portion) of the exposed surface of the base material 2 by using the ink used in the present invention. ing.

As shown in FIG. 2, the releasable information-carrying sheet 1 of the present invention is folded in two, the superposed surfaces are brought into contact with each other, and a predetermined pressure is applied to the superposed surfaces so that the superposed surfaces can be connected to each other. Adhered releasably. Then, printing can be performed on the exposed surface of the ink-jet ink receiving layer 4 of the base material 2 using the ink-jet ink.

As shown in FIG. 3, the three-fold type releasable information-carrying sheet 1A of the present invention has a pressure-sensitive adhesive composition on the entire surface of the substrate 2 including the superposed surface of the substrate 2 and the entire back surface. An adhesive layer 3 which is not adhered in a normal state is formed by applying an object, and a predetermined portion (a variable information printing portion such as an address printing portion) on the exposed surface of the base material 2 on which the adhesive layer 3 is formed. The inkjet ink receiving layer 4 is formed using the ink used in the present invention.

As shown in FIG. 4, the releasable information-carrying sheet 1A of the present invention is folded in three, the superposed surfaces thereof are brought into contact with each other, and a predetermined pressure is applied thereto. Adhered releasably. And adhesive layer 3
Can be printed on the exposed surface of the ink-jet ink-receiving layer 4 of the substrate 2 on which the ink-jet ink has been formed by using an ink-jet ink.

The glycol solvent used in the present invention is a medium- and high-boiling solvent (having a boiling point of 100 ° C. or higher) which can be mixed with water. Specifically, for example, glycol (glycerin, ethylene glycol, diethylene glycol, Triethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol)
And glycol derivatives (ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monoethyl Butyl ether acetate), and mixtures of two or more of these.

The acrylic photocurable component used in the present invention can be arbitrarily selected from known photopolymerizable monomers and / or photopolymerizable oligomers. Such photopolymerizable monomers include, for example, unsaturated carboxylic acids such as acrylic acid and methacrylic acid or esters thereof, for example, alkyl-, cycloalkyl-, halogenated alkyl-, alkoxyalkyl-, hydroxyalkyl-, aminoalkyl- , Tetrahydrofurfuryl-,
Allyl-, glycidyl-, benzyl-, phenoxy-acrylate and methacrylate, alkylene glycol, polyoxyalkylene glycol mono- or diacrylate and methacrylate, trimethylolpropane triacrylate and methacrylate, pentaerythritol tetraacrylate and methacrylate, acrylamide, methacryl Amides or derivatives thereof, for example, acrylamide and methacrylamide mono- or di-substituted with an alkyl group or a hydroxyalkyl group, diacetone acrylamide and methacrylamide, N, N'-
Allyl compounds such as alkylenebisacrylamide and methacrylamide, for example, allyl alcohol, allyl isocyanate, diallyl phthalate, triallyl isocyanurate, maleic acid, maleic anhydride, fumaric acid or esters thereof, for example, alkyl, alkyl halide, alkoxyalkyl Other unsaturated compounds such as mono- or dimaleate and fumarate, for example, styrene, vinyl toluene, divinyl benzene, N-vinyl carbazole, N-vinyl pyrrolidone and the like are used.

In the case of an application in which curing shrinkage is a problem, for example, isobornyl acrylate or methacrylate, norbornyl acrylate or methacrylate, dicyclopentenoxyethyl acrylate or methacrylate, dicyclopentenoxypropyl acrylate or Such as methacrylate, acrylate or methacrylate of diethylene glycol dicyclopentenyl monoether, acrylate or methacrylate of polyoxyethylene or polypropylene glycol dicyclopentenyl monoether, such as dicyclopentenyl cinnamate, dicyclopentenoxy Ethyl cinnamate, dicyclopentenoxyethyl monofumarate or difumarate, such as 3,9-bis (1,1
-Bismethyl-2-oxyethyl) -spiro [5,5]
Undecane, 3,9-bis (1,1-bismethyl-2-
(Oxyethyl) -2,4,8,10-tetraoxaspiro [5,5] undecane, 3,9-bis (2-oxyethyl) -spiro [5,5] undecane, 3,9-bis (2-oxyethyl) Mono-, diacrylate or mono-, such as -2,4,8,10-tetraoxaspiro [5,5] undecane, dimethacrylate, or mono-, ethylene- or propylene oxide addition polymers of these spiroglycols; Diacrylate, or mono-, dimethacrylate, or methyl ether of the above-mentioned monoacrylate or methacrylate, 1-azabicyclo [2,2,2] -3-octenyl acrylate or methacrylate, bicyclo [2,2,1] -5 Dicyclopentane such as heptene-2,3-dicarboxyl monoallyl ester Enyl acrylate or methacrylate, it can be used a photopolymerizable monomer, such as dicyclopentadienyl oxyethyl acrylate or methacrylate, dihydrodicyclopentadienyl acrylate or methacrylate. These photopolymerizable monomers may be used alone or in combination of two or more.

Examples of the photopolymerizable oligomer include an acrylate of an epoxy resin such as diglycidyl ether diacrylate of bisphenol A, a reaction product of an epoxy resin with acrylic acid and methyltetrahydrophthalic anhydride, and an epoxy resin with 2-hydroxy Epoxy resin prepolymers such as reaction products with ethyl acrylate, reaction products of diglycidyl ether of epoxy resin with diallylamine, ring-opening copolymers of glycidyl diacrylate with phthalic anhydride, and methacrylic acid dimers Unsaturated polyester-based prepolymers such as esters of polyesters and polyols, polyesters obtained from acrylic acid, phthalic anhydride and propylene oxide, and reaction products of polyethylene glycol, maleic anhydride and glycidyl methacrylate A reaction product of polyvinyl alcohol and N-methylolacrylamide, a polyvinyl alcohol-based prepolymer such as one obtained by esterifying polyvinyl alcohol with succinic anhydride and then adding glycidyl methacrylate, and pyromellitic dianhydride. A polyamide prepolymer such as a prepolymer obtained by reacting a diallyl ester with p, p'-diaminodiphenyl, a reaction product of an ethylene-maleic anhydride copolymer with allylamine, methyl vinyl ether-maleic anhydride A reaction product of an acid copolymer and 2-hydroxyethyl acrylate, or a polyacrylic acid or maleic acid copolymer prepolymer such as a product obtained by further reacting glycidyl methacrylate; Linked alkylene segments, or saturated polyester segment or both, and the like urethane prepolymer having an acryloyl group or a methacryloyl group at both ends. These photopolymerizable oligomers suitably have a weight average molecular weight in the range of about 2,000 to 30,000.

As the photopolymerization initiator, any one can be selected from known photopolymerization initiators and used.
Specific examples of such a photopolymerization initiator include, for example, benzoin, benzoin ethyl ether, benzoin-
Benzoin alkyl ethers such as n-propyl ether, benzoin-isopropyl ether, benzoin isobutyl-ether, 2,2-dimethoxy-2-phenylacetophenone, benzophenone, benzyl, diacetyl, diphenyl sulfide, eosine, thionin,
9,10-anthraquinone, 2-ethyl-9,10-anthraquinone and the like can be mentioned. These photopolymerization initiators may be used alone or in combination of two or more. The content of the photopolymerization initiator is preferably selected in the range of usually 5 to 15 parts by mass per 100 parts by mass of the vehicle.

The porous fine particles used in the present invention may be hydrophobic porous fine particles, hydrophilic porous fine particles, or a mixture thereof. The hydrophobic porous fine particles are difficult to disperse in water, and even when dispersed in water, they are precipitated and separated into two layers when left standing still.
On the other hand, hydrophilic porous fine particles can be easily dispersed in water, and after being dispersed, they do not precipitate even when allowed to stand still, and maintain a uniform suspension state. Fine particles.

Examples of the hydrophobic porous fine particles include hydrophobic inorganic oxide porous fine particles and hydrophobic resin porous fine particles. Specific examples of the hydrophobic inorganic oxide porous fine particles include, for example, silica fine particles <trade name: SS-10, SS
-15, SS-10A, SS-20, SS-30P, S
S-30S, SS-40, SS-50, SS-50A,
SS-60, SS-70, SS-100, SS-10
F, SS-50F, SS-50B, SS-50C, SS
-72F, SS-170X, SS-178B (manufactured by Nippon Silica Industry Co., Ltd.)> And titanium dioxide <trade name: T805 (manufactured by Nippon Aerosil Co., Ltd.)>.

Specific examples of the hydrophobic fine resin particles include, for example, ethylene tetrafluoride resin (trade name: Teflon (R) 30J (manufactured by Mitsui Dupont Fluorochemicals)), vinylidene hexafluoride resin (trade name) Name: NEOFLON CTFE (manufactured by Daikin Industries)>, ethylene trifluoride chloride resin (brand name: NEOFRON VDF (manufactured by Daikin Industries)), propylene hexafluoride (brand name: NEOFRON FEP (manufactured by Daikin Industries)) , Fluorinated ethylene-propylene copolymer resin (trade name: Teflon (R) 120J)
(Manufactured by Du Pont-Mitsui Fluorochemicals)>. These may be used alone or in combination of two or more.

On the other hand, examples of the hydrophilic porous fine particles include hydrophilic inorganic oxide porous fine particles and hydrophilic resin porous fine particles. Specific examples of the hydrophilic porous fine particles include, for example, alumina fine particles, various starch-based fine particles, fine acrylic resin, fine methacrylic resin, natural zeolite, synthetic zeolite, calcium carbonate, activated clay, and the like. These may be used alone or in combination of two or more.

In the present invention, a cationic resin may be further added to the vehicle in addition to the porous fine particles in order to further improve the water resistance and the like. The cationic resin used in the present invention may be an oligomer or polymer of a primary to tertiary amine or a quaternary ammonium salt in the form of an aqueous solution or an aqueous dispersion. An oligomer or polymer of a quaternary ammonium salt may be used. Specific examples of particularly preferred cationic resins include, specifically, for example, dimethylamine / epichlorohydrin polycondensate, acrylamide / diallylamine copolymer, polyvinylamine copolymer, and the like, or a mixture of two or more of these. it can. As the cationic resin in the present invention, a commercially available resin can be suitably used.

Specific examples of commercially available cationic resins in the form of an aqueous solution or an aqueous dispersion include, for example, an aqueous solution such as Sanfix PRO-10 manufactured by Sanyo Chemical Industries, Ltd.
0 (polyamine-based aqueous solution), Sunfix 70 (dicyandiamide-based aqueous solution), Kachiogen L (quaternary ammonium salt aqueous solution) manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd., Sharol D
C-303P (polydimethyldiallylammonium chloride aqueous solution), Charol DC-902P (polydimethyldiallylammonium chloride aqueous solution), Epomin P-1000 (polyethyleneimine) manufactured by Nippon Shokubai Co., Ltd., PAA-HCI- manufactured by Nitto Boseki Co., Ltd. 3L (polyallylamine hydrochloride), PAA-HCI-10L (polyallylamine hydrochloride) and the like can be mentioned. Also,
Examples of the aqueous dispersion include Sunstat 1200 (a quaternary ammonium salt type) manufactured by Sanyo Kasei Kogyo Co., Ltd., Nikka Silicon AMZ (amino-modified silicon emulsion) manufactured by Nikka Chemical Co., Ltd., and Nikka Silicon AM-202 (amino-modified silicon). Emulsion), Nikka Silicon AMZ-3 (amino-modified silicone emulsion) and the like.

Specific examples of the commercially available powdered cationic resin include, for example, Sanamine Kasei Kogyo Co., Ltd. polyamine-based Sanfix 555, Sanfix 555C, Sanfix 555NK, Sanfix 555US, Daiichi Kogyo Seiyaku ( Rheox AS (special cation resin), Charol DM-254P (methacrylic acid ester chloride quaternary salt polymer), Charol DM-283P (methacrylic acid ester chloride quaternary salt polymer), PAA manufactured by Nitto Boseki Co., Ltd. -HCI-3S (polyallylamine hydrochloride), PAA-HCI-10S (polyallylamine hydrochloride) and the like.
Examples include Epomin SP-012 (polyethyleneimine), Epomin SP-110 (polyethyleneimine), and Epomin SP-200 (polyethyleneimine) manufactured by Nippon Shokubai Co., Ltd.

In the present invention, the contents of the porous fine particles and the cationic resin relative to the vehicle are not particularly limited. However, based on 100 parts by mass of the vehicle, 2 to 70 parts by mass of the porous fine particles, preferably 10 to 10 parts by mass
It is desirable to add 60 parts by mass, more preferably 20 to 55 parts by mass, and 5 to 120 parts by mass, preferably 5 to 60 parts by mass, more preferably 5 to 50 parts by mass of the cationic resin. If the porous fine particles and the cationic resin are less than the lower limit, water resistance and bleeding of a printed image may not be improved, and ink absorption is poor, and the printed ink remains on the paper surface. When the porous fine particles and the cationic resin exceed the upper limits, the water resistance is improved, but the suitability for printing ink may be undesirably reduced.

In the present invention, when a vehicle containing a glycol solvent having a boiling point of 100 ° C. or higher as a main component is used, a vehicle further containing a binder resin can be used if necessary. Further, by blending a binder resin, the formed inkjet ink receiving layer becomes more resistant to rubbing, and even if rubbed with an OCR reader or the like, the porous fine particles do not separate or the inkjet ink receiving layer does not peel.

The binder resin used in the present invention is not particularly limited as long as it can be used together with the glycol solvent. Specifically, for example, albumin, gelatin, casein, starch, gum arabic, natural resins such as sodium alginate, carboxymethyl cellulose, cellulose derivatives such as hydroxyethyl cellulose, polyamide, polyacrylamide, polyhydroxyethyl methacrylate, polyphenylacetoacetal, Polyethylene imine, polyvinyl pyrrolidone, polyvinyl pyridium halide, melamine resin, polyurethane, polyvinyl alcohol and its derivatives, polyester, polyacrylic acid soda, synthetic resin such as acrylate copolymer, dimethylamine / epichlorohydrin polycondensate, acrylamide Diallylamine copolymer, polyvinylamine copolymer, dicyandiamide, dimethyl
Cationic resin such as a compound containing diallyl ammonium chloride as a main component or a mixture of two or more of these, electron beam curable ink, ultraviolet curable ink, sulfonic acid group, carboxyl group, sulfate group,
Anionic resins such as rosin-modified maleic acid having an anionic group such as a phosphate group can be exemplified.

The vehicle used in the present invention may further contain, if desired, commonly used additives such as a reactive diluent, a tackifier, a viscosity modifier, an antioxidant, a pH regulator and a defoamer. , Various stabilizers, coloring agents, lubricants, sensitizers and the like.

The method for forming the ink-jet ink receiving layer 4 on a predetermined portion of the exposed surface of the substrate 2 is not particularly limited. For example, the ink used in the present invention is manually applied by brushing or the like. Can be mentioned. However, using the ink used in the present invention, a coating layer such as a gravure coater, flexo, air knife coater, or bar coater may be used to form an adhesive layer on a substrate and / or
Alternatively, a method in which the inkjet ink receiving layer 4 is formed by coating a predetermined portion other than the adhesive layer can be preferably used. In the case of an ink using a vehicle containing a glycol-based solvent having a boiling point of 100 ° C. or higher as a main component, an adhesive layer of a substrate and / or
Alternatively, after coating on a predetermined portion other than the adhesive layer, the inkjet ink receiving layer 4 can be formed without performing special drying.
On the other hand, in the case of an ink using a vehicle containing an acrylic photocurable component as a main component, the ink is applied to the adhesive layer of the base material and / or a predetermined portion other than the adhesive layer, and then the ultraviolet light is applied using a known ultraviolet irradiation apparatus. To cure the ink-jet ink receiving layer 4.

The pressure-sensitive adhesive composition used in the present invention is a natural rubber-based pressure-sensitive adhesive or a styrene-methyl methacrylate-graft copolymer which is used in this type of information-removable sheet. A pressure-sensitive adhesive composition in which a fine-grained filler such as starch, silica gel, synthetic zeolite, or micro-spherical acrylic resin is blended with a natural rubber-based adhesive, or an acrylic photopolymerizable oligomer or acrylic light as described above. An ultraviolet-curable pressure-sensitive adhesive composition comprising a polymerizable monomer and a photopolymerization initiator can be used.

The pressure-sensitive adhesive composition used in the present invention comprises
Beer coater, flexo, air knife coater, barco
Is applied to the substrate by a coating means such as
, Tri-fold, cut and overlap, or overlap of different bodies
Temporarily glues in various superimposed forms
However, information with a double-faced surface that can be easily peeled off when necessary
An information carrying sheet can be made. The application at this time is
It may be carried out over the entire surface of the substrate, or
You may go only. This substrate surface must be
May be printed or after the cured layer is provided
Information may be printed. In addition, pressure sensitive adhesion to the surface of the substrate
The application amount of the agent composition depends on the adhesiveness of the adhesive layer, the releasability,
Is 1 to 30 g / m2 for maintaining transparency.^Two ,Preferably
3 to 20 g / m ^Two And more preferably 5 to 15 g / m.^Two 
Is selected to be within the range.

As the substrate used in the present invention, besides ordinary paper, synthetic paper or a synthetic film of polyethylene, transparent polyethylene terephthalate, polypropylene, vinyl chloride or the like can be used. When using these synthetic films, the surface of the substrate is preferably subjected to a surface treatment such as a mat treatment or a corona treatment. Ordinary paper is composed mainly of wood pulp and pigment. As wood pulp, chemical pulp such as LBKP, NBKP, etc., GP, PGW, RMP, TMP, CTM
Including mechanical pulp such as P, CMP, CGP, pulp such as waste paper pulp such as DIP, etc., if necessary, conventional pigments and binders and sizing agents and fixing agents, retention agents,
Various additives such as a cationizing agent and a paper strength enhancer are mixed using one or more kinds, and can be manufactured by various apparatuses such as a fourdrinier paper machine, a round paper machine, a twin wire paper machine, and the like. Paper can be made with alkaline and alkaline properties.

As the inkjet ink used in the present invention, for example, JP-A-7-228808,
No. 7,228,809 can be used. In particular, at least one anionic selected from the group consisting of anthraquinone, benzoquinone, naphthoxyquinone, xanthene, triphenylmethane, quinoline, indigoid, azine, oxazine, thiazine and methine dyes Ink is preferably used. These specific examples are described in JP-A-7-2288.
No. 09, paragraph No. 0015. As a medium used for this ink, a mixed solvent of water and a water-soluble organic solvent can be used. In addition, a pH adjuster, a viscosity adjuster, a surface tension adjuster and the like can be contained.

[0040]

The present invention will be described in more detail with reference to the following Examples and Comparative Examples, but the present invention is not limited to these Examples. (Example 1) Polyethylene glycol diacrylate (n $ 13-14) (trade name: ARONIX M-260)
(Toa Gosei Co., Ltd.)> 92 parts by mass and 8 parts by mass of a photopolymerization initiator (trade name: VICURE55 (manufactured by Akzo Nobel)). 30 parts by mass of porous particles of aluminum oxide (trade name: aluminum oxide C (manufactured by Nippon Aerosil Co., Ltd.)) are kneaded with 100 parts by mass of the obtained vehicle liquid. Further, a polyethyleneimine-based cationic agent of a cationic resin as a water resistance improver (trade name: EPOMIN SP-110)
(Manufactured by Nippon Shokubai Co., Ltd.)> And 0.1 part by mass of methylhydroquinone (stabilizer), and kneaded using a three-roll mill to prepare an ink used in the present invention.

This ink was coated on a coated paper type two-fold type releasable information carrying sheet (trade name: POSTEX-140S (manufactured by Toppan Forms)) as shown in FIG. Coating amount)
The composition was coated so as to be 8 g / m ² and cured by irradiating ultraviolet rays to form an inkjet ink receiving layer. Then, an address and data were printed on the ink-jet ink receiving layer with a black dye ink [# 1040] using an ink-jet printer [manufactured by Scitex]. After printing, the overlapping surfaces were brought into contact with each other by a sealing device and pressure was applied so that the peeling adhesive force was 30 N / m, so that the overlapping surfaces were peelably bonded to each other, as shown in FIG. Such a sheet for carrying removable information of the present invention was produced. After the obtained releasable information-carrying sheet of the present invention was immersed in running water for 1 minute, it was sufficiently dried. There was no particular change in the address and data printing of the releasable information-carrying sheet of the present invention printed with the dye ink, and the sheet was excellent in water resistance.

(Comparative Example 1) A releasable information-carrying sheet for comparison was prepared in the same manner as in Example 1 except that the ink-jet ink receiving layer was not formed. In the test, the address and data printed with the dye ink were incapable of reading because the ink flowed and did not function as an information carrying sheet.

(Example 2) Rosin-modified maleic acid (trade name: Tespol 11) was added to 96 parts by mass of diethylene glycol.
54 (manufactured by Hitachi Chemical Polymer Co., Ltd.)> 4 parts by mass are dissolved. 25 parts by mass of porous silica fine particles (trade name: Nipsil E200 (manufactured by Nippon Silica Co., Ltd.)) are mixed with 100 parts by mass of the obtained vehicle liquid, and a polyethyleneimine-based cationizing agent of a cationic resin as a water resistance improver (product) Name: Epomin SP-110 (manufactured by Nippon Shokubai Co., Ltd.)>
The ink used in the present invention was prepared by kneading using a three-roll mill in addition to parts by mass.

This ink was coated on the coated paper type as shown in FIG. 1 and the address printing surface (without an adhesive layer) of a releasable information-carrying sheet <trade name: POSTEX-130S (Toppan Forms)> Surface) coating amount 2.0
g / m ² to form an inkjet ink receiving layer. And inkjet printer [S
citex Co., Ltd.], a black dye ink [Model number: #]
1040]. After printing, the overlapping surfaces were brought into contact with each other by a sealing device and pressure was applied so that the peeling adhesive force was 30 N / m, so that the overlapping surfaces were peelably bonded to each other, as shown in FIG. Such a sheet for carrying removable information of the present invention was produced. The obtained releasable information-carrying sheet of the present invention was tested for water resistance in the same manner as in Example 1. As a result, the address and data printing of the re-peelable information-carrying sheet of the present invention printed with dye ink were particularly There was no change and the water resistance was excellent.

Comparative Example 2 A releasable information-carrying sheet for comparison was prepared in the same manner as in Example 2 except that the ink-jet ink-receiving layer was not formed, and the water resistance was adjusted in the same manner as in Example 1. In the test, the address and data printed with the dye ink were incapable of reading because the ink flowed and did not function as an information carrying sheet.

Example 3 Using the ink prepared in Example 1, a double-sided printing type (W peel type) tri-fold type releasable information carrying sheet as shown in FIG. 3 (trade name: POSTEX) 109W (manufactured by Toppan Forms Co., Ltd.)> On the address printing surface (the surface with the adhesive layer) so as to have a coating amount of 1.5 g / m ² , and then irradiate with ultraviolet rays to cure the ink jet ink receiving layer. Formed. Then, an address and data were printed on the ink-jet ink receiving layer with a black dye ink [# 1040] using an ink-jet printer [manufactured by Scitex]. After printing, the overlapping surfaces of the tri-folded sheets in the Z-folding can be peeled by applying pressure so that the overlapping surfaces are brought into contact with each other with a sealing device so that the peeling adhesive force becomes 25 N / m. By bonding, a releasable information-carrying sheet of the present invention as shown in FIG. 4 was produced. The obtained releasable information-carrying sheet of the present invention was tested for water resistance in the same manner as in Example 1. As a result, the address and data printing of the re-peelable information-carrying sheet of the present invention printed with dye ink were particularly There was no change and the water resistance was excellent.

Comparative Example 3 A releasable information-carrying sheet for comparison was prepared in the same manner as in Example 3 except that the ink-jet ink-receiving layer was not formed. In the test, the address and data printed with the dye ink were incapable of reading because the ink flowed and did not function as an information carrying sheet.

Example 4 Using the ink prepared in Example 2, a double-sided printing type (W-peel type) tri-fold type releasable information-carrying sheet as shown in FIG. 3 (trade name: POSTEX) 109W (manufactured by Toppan Forms Co., Ltd.)> Was applied on the address printing surface (the surface having the adhesive layer) so as to have a coating amount of 1.5 g / m ² to form an inkjet ink receiving layer. Then, an address and data were printed on the ink-jet ink receiving layer with a black dye ink [# 1040] using an ink-jet printer [manufactured by Scitex]. After printing, the superposed surfaces are brought into contact with each other by a sealing device, and the peel adhesion is 25 N /
m by applying pressure so that the superposed surfaces of the tri-folded sheets stacked in the Z-fold are peelably adhered to each other to form the releasable information-carrying sheet of the present invention as shown in FIG. Had made. The removability information-carrying sheet of the present invention was tested for water resistance in the same manner as in Example 1, and as a result,
There was no particular change in the address and data printing of the releasable information-carrying sheet of the present invention printed with the dye ink, and the sheet was excellent in water resistance.

Comparative Example 4 A releasable information-carrying sheet for comparison was prepared in the same manner as in Example 4 except that the ink-jet ink-receiving layer was not formed. In the test, the address and data printed with the dye ink were incapable of reading because the ink flowed and did not function as an information carrying sheet.

[0050]

The releasable information-carrying sheet according to claim 1 of the present invention can be obtained economically and advantageously at a low production cost, and can be obtained by blending porous fine particles with a specific vehicle or further comprising Since the ink-jet ink receiving layer is formed in the adhesive layer of the base material and / or in a predetermined portion other than the adhesive layer (a variable information printing portion such as an address printing portion) using the ink containing the cationic resin, the ink-jet ink absorption is performed. In addition to the excellent effect, the water resistance of the printed ink-jet ink can be improved, and the printed image can be printed without blurring. Since the ink used in the present invention has excellent printability, an ink-jet ink receiving layer can be easily formed only at a necessary predetermined portion other than the adhesive layer and / or the adhesive layer of the base material, so that the cost can be reduced. In addition, there is a remarkable effect that the offset printing is not affected.

The releasable information-carrying sheet according to claim 2 of the present invention has the same effects as described above, and contains 2 to 70 parts by mass of porous fine particles with respect to 100 parts by mass of the vehicle.
Since the cationic resin is compounded in an amount of 5 to 120 parts by mass, the water resistance can be improved without deteriorating the printability of the ink, which is a further remarkable effect.

The releasable information-carrying sheet according to the third aspect of the present invention has the same effects as described above, and in addition, since the predetermined portion is a variable information printing portion such as an address printing portion, it is particularly required to be made of water-resistant. This has the further remarkable effect of preventing bleeding of a printed image at a certain place and improving printing quality.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of a two-fold type releasable information-carrying sheet of the present invention before the superposed surfaces are releasably bonded to each other.

FIG. 2 is an explanatory cross-sectional view schematically showing a cross section in which the releasable information-carrying sheet of the present invention shown in FIG. 1 is folded in two and the superposed surfaces are releasably adhered.

FIG. 3 is an explanatory view showing one embodiment of a three-fold type releasable information-carrying sheet of the present invention before the superposed surfaces are releasably bonded to each other.

FIG. 4 is a cross-sectional explanatory view schematically showing a cross-section in which the releasable information-carrying sheet of the present invention shown in FIG. 3 is folded in three and the superposed surfaces are releasably bonded.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1A Removable information carrying sheet of the present invention 2 Base material 3 Adhesive layer 4 Ink jet ink receiving layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Akira Hirasawa 1-6, Kanda Surugadai, Chiyoda-ku, Tokyo Toppan Forms Co., Ltd. F-term (reference) 2C005 WA03 2C056 EA13 FC06 2H086 BA01 BA15 BA19 BA21 BA33 BA36 BA37 BA41 4J004 AB01 CC03 FA01

Claims (3)

[Claims] 1. A pressure-sensitive adhesive composition is applied to a predetermined portion of a superposed surface of a substrate to form an adhesive layer that does not adhere in a normal state, and the predetermined pressure is applied by bringing the superposed surfaces into contact with each other. The information carrying sheet for bonding the superposed surfaces to each other in a peelable manner, wherein a glycol-based solvent having a boiling point of 100 ° C. or higher is mainly applied to the adhesive layer and / or a predetermined portion other than the adhesive layer of the base material. An ink-jet ink receiving layer formed using an ink containing at least porous fine particles or an ink further containing a cationic resin with respect to a vehicle containing a component or an acrylic photocurable component as a main component. A releasable information-carrying sheet, comprising: 2. 2 to 70 parts by mass of the porous fine particles and 5 to 12 parts by mass of the cationic resin with respect to 100 parts by mass of the vehicle.
The releasable information-carrying sheet according to claim 1, wherein 0 parts by mass are blended. 3. The removable information carrying sheet according to claim 1, wherein the predetermined portion is a variable information printing portion.