JP2003108007A - Label for ink jet recording - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light weight label having an ink jet recording surface with gloss, provided with a tacky adhesive layer which can be easily affixed and excellent in masking properties for masking the surface of the body to be affixed. SOLUTION: In the label for ink jet recording wherein at least one coating layer, whose uppermost layer is a gloss developing layer, is formed on one surface of a gas permeable substrate and the tacky adhesive layer is formed on other side, the gloss developing layer is brought into pressure contact with a heated mirror roll to be mirror-gloss-finished while being in a wet state, pigment having refractive index of >=1.60 is contained in any of the coating layer, the tacky adhesive layer and the substrate. The label has >=80% opacity. The substrate is preferably a paper having <=80 g/m<2> basis weight. The gloss developing layer contains inorganic fine particles preferably having <=100 nm average diameter and more preferably being alumina compound or colloidal silica. The pigment having refractive index of >=1.60 is preferably titanium oxide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording label having an adhesive layer on the back side, and more specifically, it has a glossy ink jet recording surface with good image coloring and has a label adherend. The present invention relates to an inkjet recording label with less background blemishes.

[0002]

2. Description of the Related Art The ink jet recording system is a system in which minute droplets of ink are ejected and adhered to a recording sheet such as paper by various operating principles to record images, characters, etc., but high speed and low noise. It is characterized by easy multicoloring, great flexibility in recording patterns, and no need for development-fixing, and is rapidly spreading in various applications as a recording device for various figures and color images including Chinese characters. Further, an image formed by a multicolor ink jet method can obtain a recording comparable to that of multicolor printing by a plate making method or printing by a silver salt color photographic method. It is being used widely in the field of full-color image recording, because it is cheaper than the photographic technique in the applications requiring less.

As a recording sheet used in the ink jet recording system, efforts have been made from the viewpoint of the apparatus and the ink composition in order to use high-quality paper or coated paper used for ordinary printing and writing. However, as the performance of the inkjet recording apparatus has been improved and the applications have been expanded, such as the speeding up and the definition of the apparatus or the full-colorization of the apparatus, more advanced characteristics have been required for the recording sheet. That is, as the recording sheet, the density of print dots is high, the color tone is bright and vivid, the ink does not run or bleed even when the print dots overlap and the print dots overlap. The spread in the direction is uniform and not too large, and the periphery is smooth and does not blur,
It is required that the image quality does not change over time or in the environment, for example, it has excellent weather resistance, water resistance, and ozone resistance, and it also has excellent glossiness and is visually pleasing.

In response to such a demand, some proposals have been made in the past. In order to improve the ink absorbency and prevent the diffusion of print dots, a method of providing an ink receiving layer on a support is disclosed in JP-A-52-9074 and JP-A-58-72.
No. 495, etc. Focusing on the fact that the distribution state of the dye component in the ink in the ink receiving layer affects the color property and sharpness, a method using a specific agent that adsorbs the dye component is disclosed in JP-A-55-144172. Is disclosed in. Further, in order to improve weather resistance, water resistance and ozone resistance, JP-A-60-11389 containing a basic oligomer, a polyvinylamine copolymer in a coating layer in or on a substrate is used. Japanese Patent Application Laid-Open No. 64-808
No. 5, etc. are disclosed.

Further, after ink jet recording, a film is stuck on the surface, a clear resin layer is applied,
A layer of thermoplastic resin particles is provided on the surface of the ink receiving layer in advance, and water resistance and gloss are imparted by melting the resin after inkjet recording.
No. 891, No. 62-183383, and Japanese Patent Laid-Open No.
No. 1-182055, No. 01-182081, No. 02-81663, No. 07-237348.
Japanese Patent Publication etc. are also disclosed.

On the other hand, there are recording papers and films coated with a resin that absorbs ink by dissolving or swelling for the purpose of imparting gloss to the ink jet recording sheet. Although the glossiness can be obtained, the problem is that the ink absorption and drying speeds are slow, and stains and bleeding due to ink transfer occur.

Further, as a treatment method for imparting gloss, it is generally known that a calendering device such as a super calender or a gloss calender is used, and the surface of the coating layer is smoothed by passing the paper between rolls under pressure or temperature. Has been. However, when the calendar treatment is performed under a high linear pressure for the purpose of imparting gloss to the inkjet recording sheet, the gloss is improved but the coating layer void is reduced, the ink absorption is slowed, and the ink absorption capacity is insufficient. It is difficult to obtain a high gloss by calendering because of the problem that the overflow occurs.

[0008] As a method of imparting strong gloss to an ink jet recording sheet without lowering the ink absorption,
For example, JP-A-63-265680 and JP-A-02
As disclosed in JP-A-274587 and JP-A-05-59694, methods for producing an inkjet recording sheet by a cast coating method are disclosed. According to this method, the mirror surface shape of the cast drum is transferred to the ink jet recording sheet, so that the smoothness of the surface becomes extremely high and strong gloss is obtained. Further, since the linear pressure when pressed against the cast drum is lower than that when a calender device is used, good ink absorbency can be obtained.

Further, with the diversification of uses, it is used for posters and POP arts, and an adhesive layer is provided on the back surface.
Price display label, product display (bar code) label,
It is increasingly used as a label application such as a label for quality display, a label for weighing display, a label for advertising and promotion (sticker). In particular, barcode labels can take advantage of the high sharpness of inkjet recording, and advertising labels can obtain good images because they are excellent in sharpness and color, and the advertising effect is good. It will be big. Further, it is possible to easily obtain an image excellent in image reproducibility and color reproducibility such as sharpness and color property at the personal computer level, which is also the reason why the inkjet recording sheet is frequently used. In particular, labels are used in many fields because they adhere well to a wide range of adherends and are easy to apply, and it is possible to obtain good characteristics of labels and good images on inkjet recording sheets. Applications that combine the features of being available are expanding.

[0010]

DISCLOSURE OF THE INVENTION The present invention provides a hiding property of an adherend surface, which has an ink jet recording surface having a good image coloring property and a glossy surface and is provided with an adhesive layer which can be easily adhered to an adherend. It is intended to provide an excellent lightweight label.

[0011]

Means for Solving the Problems As a result of intensive studies for achieving the above-mentioned object, the present inventors have found that at least one coating layer is provided on an air-permeable support, and the outermost layer is It is a gloss-developing layer provided by a cast coating method, an adhesive layer is provided on the opposite side, and at least one of the coating layer or the adhesive layer or the support contains a pigment having a high refractive index. The inventors have found that the object can be achieved and completed the present invention.

That is, in at least one coating layer provided on one surface of the air-permeable support, the outermost surface of which is a gloss-developing layer, and an adhesive layer is provided on the opposite side to an ink-jet recording label. The gloss-developing layer is brought into a mirror-gloss finish by being brought into pressure contact with a heated mirror-surface roll while the gloss-developing layer is in a wet state, and is refracted to any of the coating layer, the adhesive layer or the air-permeable support. An inkjet recording label comprising a pigment having a ratio of 1.60 or more and having an opacity of 80% or more.

It is preferable that the air-permeable support is paper containing wood pulp as a main component, and the basis weight thereof is 80 g / m ² or less.

It is preferable that the gloss developing layer contains inorganic fine particles, and the average diameter of the inorganic fine particles is 100 nm or less.

More preferably, the inorganic fine particles are at least one selected from alumina compounds, colloidal silica and vapor phase silica.

The pigment having a refractive index of 1.60 or more is preferably titanium dioxide.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The ink jet recording label of the present invention will be described in detail below.

The present invention is a label for ink jet recording wherein at least one coating layer is provided on one surface of the air-permeable support, the outermost surface layer is the gloss developing layer, and the adhesive layer is provided on the opposite side. In which the gloss-developing layer is brought into a mirror-gloss finish by being brought into pressure contact with a mirror-roll which is heated while the gloss-developing layer is in a wet state, and any one of the coating layer, the adhesive layer or the air-permeable support. An ink jet recording label, wherein the label contains a pigment having a refractive index of 1.60 or more and the opacity of the label is 80% or more.

As the support used in the practice of the present invention, the material is not limited as long as it has air permeability.
That is, paper having wood pulp as a main component, a porous resin film made of a thermoplastic resin containing inorganic fine particles, and further a non-woven fabric, a cloth and the like can be mentioned. Depending on the material, when the gloss-developing layer is provided by the cast coating method, the material may be deformed, and therefore, paper containing wood pulp as a main component is preferable. Paper support has a basis weight of 80 g
/ M ² or less is preferable. If it exceeds 80 g / m ² , the label provided with the gloss-developing layer and the pressure-sensitive adhesive layer becomes too stiff, and it becomes difficult for the label to adhere to the adherend, which is not preferable.

The gloss-developing layer to be mirror-finished is manufactured by a cast coating method. The cast coating method, after applying a coating liquid consisting of the coating composition constituting the glossy layer, while the coating surface is in a wet state,
This is a method in which the coated surface is contacted with a heated mirror surface roll, pressure-bonded, dried and peeled off to form a replica of the surface of the mirror surface roll on the coated surface. The coating composition constituting the glossy layer is mainly composed of inorganic or organic fine particles and a binder.

As a general cast coating method, there are a direct method, a solidification method and a rewetting method (rewet method). The direct method is a method in which the gloss-developing layer is applied and then pressed against a mirror surface roll that has been heated in an undried state (wet state) to dry, and the coagulation method is a coating composition for the gloss-developing layer. Is a method in which the composition is coagulated with an acid solution, an alkaline solution or the like, and is pressed against a heated mirror surface roll. The coagulation method also includes a thermal coagulation method of irradiating the composition with infrared rays to coagulate the surface. The rewetting method is a method in which the gloss-developing layer is applied and dried, and then the gloss-developing layer is re-wetted with a liquid containing water as a main component, and is pressed against a heated mirror surface to be dried. In the present invention, any cast coating method may be used as required.

Various conventionally known pigments can be used as the inorganic or organic fine particles constituting the gloss developing layer. For example, silica (colloidal silica, gel amorphous silica, wet amorphous silica, dry amorphous silica), alumina or alumina hydrate (alumina sol, colloidal alumina, cationic aluminum oxide or its water). Japanese products, pseudo boehmite, etc.), aluminum silicate, magnesium silicate, magnesium carbonate, light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, zinc carbonate, satin white, diatomaceous earth, calcium silicate, aluminum hydroxide, zeolite Inorganic pigments such as hydrolyzed halloysite and magnesium hydroxide, and organic pigments such as styrene plastic pigments, acrylic plastic pigments, polyethylene, microcapsules, and melamine resins.

Among these pigments, the average diameter is 100 n.
Inorganic fine particles of m or less are preferable, and vapor phase method amorphous silica,
Colloidal silica, finely divided magnesium carbonate, alumina compounds (alumina hydrate, γ-alumina, etc.) and the like can be mentioned. In particular, colloidal silica, fumed silica or hydrated alumina is preferable because it has high transparency and thus has good image coloring and high gloss. Particularly preferable average particle diameter of the inorganic fine particles is 5 nm or more and 50 nm or less.
When the average diameter of the inorganic fine particles exceeds 100 nm,
It is difficult to obtain sufficient surface gloss because the transparency of the gloss-developing layer decreases. If the average diameter of the inorganic fine particles is less than 5 nm, the pores may become too small and the ink absorption speed may slow down.

The content of the inorganic fine particles in the coating composition is preferably 30% by mass or more and 80% by mass or less. If the content of the inorganic fine particles is less than 30% by mass, the voids in the gloss developing layer may be reduced and the ink absorbability may be impaired. If it exceeds 80% by mass, the coating strength of the gloss developing layer may be weak. May be.

The surface gloss can be increased by adding organic fine particles which are deformed by heat to the coating composition.

The term "organic fine particles" as used in the present invention means that individual fine particles do not fuse to form a film or the like when dried at room temperature. Further, such organic fine particles are sometimes called a plastic pigment.

The glass transition temperature of the organic fine particles of the present invention is preferably 30 ° C. or higher and 150 ° C. or lower, because it does not hinder the absorption of ink even after drying and easily obtains gloss.
It is preferably 0 ° C or higher and 130 ° C or lower. If the temperature is lower than 30 ° C., the ink may be fused during drying and may hinder ink absorption. Also,
If the temperature exceeds 150 ° C, thermal deformation does not occur even when pressed against a heated mirror surface roll, and it may be difficult to obtain gloss.

Examples of such organic fine particles include acrylic resins, polyolefin resins, microcapsules,
Examples thereof include urea resin and melamine resin. Although the present invention is not limited to these, an acrylic resin is preferable because the glass transition temperature is easily adjusted and gloss is easily obtained. Particularly, an acrylic resin containing a methacrylic acid ester as a constitutional unit is used for gloss and ink absorption. It is preferable because it has high properties.

The organic fine particles contained in the gloss developing layer also preferably have an average diameter of 100 nm or less. When the average diameter of the organic fine particles exceeds 100 nm, the transparency of the gloss-developing layer decreases, and it is difficult to obtain sufficient surface gloss.

The content of the organic fine particles in the coating composition is preferably 50% by mass or less. If it exceeds 50% by mass, the voids in the gloss developing layer may decrease and the ink absorbability may be impaired.

As the binder, for example, polyvinyl alcohol, vinyl acetate, oxidized starch, etherified starch,
Cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose, casein, gelatin, soybean protein, silyl modified polyvinyl alcohol, etc .; maleic anhydride resins, styrene-butadiene copolymers, conjugated diene-based copolymers such as methyl methacrylate-butadiene copolymers. Latex; acrylic polymer latex such as polymer or copolymer of acrylic acid ester and methacrylic acid ester, polymer or copolymer of acrylic acid and methacrylic acid; vinyl polymer latex such as ethylene vinyl acetate copolymer Or a functional group-modified polymer latex with a functional group-containing monomer such as a carboxyl group of these various polymers; an aqueous binder such as a thermosetting synthetic resin system such as a melamine resin or a urea resin; a polymethylmethacrylate, a polyurethane resin, Not Sum polyester resin, vinyl chloride -
Examples thereof include synthetic resin-based binders such as vinyl acetate copolymer, polyvinyl butyral, and alkyd resin, and at least one kind can be used. or,
A cationic resin added for the purpose of fixing a conventionally known dye can also be used in combination.

The total amount of the binder can be appropriately adjusted according to the characteristics of the intended ink jet recording sheet, but in general, it is 5 per 100% by weight of the pigment.
Is about 60% by mass. Furthermore, as other additives, a pigment dispersant, a thickener, a fluidity improver, a defoaming agent, a foam suppressor, a release agent, a foaming agent, a penetrant, a coloring dye, a coloring pigment, a fluorescent whitening agent, An ultraviolet absorber, an antioxidant, an antiseptic agent, an antifungal agent, a water resistance agent, a wet paper strength enhancer, a dry paper strength enhancer and the like can be appropriately blended.

Various methods such as various blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters, curtain coaters, short dwell coaters and size presses can be used to apply the glossy layer. The coating amount of the gloss-developing layer depends on the casting method and the required gloss, but is 2 g / m.
^It should be ² or more. Also, after the cast process, humidified air,
Curling can be performed by spraying humidified steam on the back surface of the glossy layer sandwiching the support, and a calendar device such as a machine calendar, a TG calendar, a super calendar or a soft calendar may be used.

On the other hand, as the coating layer of the present invention, for the purpose of further improving the ink absorbency and suppressing cockling due to the permeation of the ink into the base paper which is the support, it is provided between the gloss-developing layer and the support. It is also possible to provide an ink receiving layer containing a porous inorganic pigment.

The ink receiving layer of the present invention is composed of a coating composition containing a porous inorganic pigment and a binder as main components. As the pigment, one or more known white pigments can be used. For example, light calcium carbonate,
Heavy calcium carbonate, magnesium carbonate, kaolin, talc, calcium sulfate, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, amorphous silica, colloidal silica, alumina, colloidal alumina, alumina hydrate Examples thereof include white inorganic pigments (pseudo-boehmite, aluminum hydroxide, etc.), zeolite, hydrohaloysite, magnesium hydroxide and the like.

As the porous inorganic pigment, amorphous silica, alumina and hydrated alumina are particularly preferable because of their large ink absorption capacity.

The binder that can be contained in the ink receiving layer of the present invention is not particularly limited as long as it can maintain an appropriate coating layer strength and does not inhibit the absorption of ink. Starch, etherified starch, starch derivative such as phosphoric acid esterified starch, cellulose derivative such as carboxymethyl cellulose, hydroxyethyl cellulose, casein, gelatin, soybean protein, polyvinyl alcohol or its derivative, polyvinylpyrrolidone, maleic anhydride resin, styrene / butadiene Copolymers, conjugated diene copolymer latexes such as methyl methacrylate / butadiene copolymers, acrylic polymer latexes such as acrylic polymers such as acrylic acid ester and methacrylic acid ester polymers or copolymers, ethylene Vinyl acetate Vinyl-based polymer latex such as coalesce, or functional group-modified polymer latex with functional group-containing monomer such as carboxy group of these various polymers, melamine resin, water-based adhesive such as thermosetting synthetic resin such as urea resin, Acrylic ester such as polymethylmethacrylate, polymer or copolymer resin of methacrylic ester,
Examples thereof include polyurethane resin, unsaturated polyester resin, vinyl chloride / vinyl acetate copolymer, polyvinyl butyral, alkyd resin, and other synthetic resin adhesives. The amount of the binder compounded is 5 to 70 parts by mass, preferably 5 to 50 parts by mass, relative to 100 parts by mass of the solid content of the porous inorganic pigment. If the amount exceeds 70 parts by mass, the ink absorbency will decrease.

Further, as an additive to the ink receiving layer,
Dye fixing agent, pigment dispersant, thickener, fluidity improver, defoaming agent, foam suppressor, release agent, foaming agent, penetrant, coloring dye, coloring pigment, fluorescent whitening agent, ultraviolet absorber, An antioxidant, an antiseptic, an antifungal agent, a water resistance agent, a wet paper strength enhancer, a dry paper strength enhancer and the like can also be appropriately added.

Particularly, a secondary amine which forms an insoluble salt with a sulfonic acid group, a carboxyl group, an amino group or the like in a water-soluble direct dye or a water-soluble acid dye which is a dye component of an aqueous ink, 3
When a cationic dye fixing agent composed of a primary amine and a quaternary ammonium salt is blended, the dye is captured in the ink receiving layer, so that the color property is improved and an insoluble salt is formed to drop the ink due to water dripping or moisture absorption. It is preferable because it suppresses bleeding and bleeding.

The coating amount of the ink receiving layer is preferably 3 g / m ² or more in order to effectively suppress cockling.

The ink receiving layer is applied by various machines such as blade coaters, roll coaters, air knife coaters, bar coaters, rod blade coaters, curtain coaters, short dwell coaters and size presses on machine or off machine. Can be used. Further, after coating, it is also possible to carry out a flat finish using a calendar device such as a machine calendar, a TG calendar, a super calendar, and a soft calendar.

In the present invention, an adhesive layer is provided on the opposite surface of the ink jet recording sheet provided with the gloss-developing layer with the support. It is preferable that the adhesive layer is provided after the gloss expressing layer is provided.

In the pressure-sensitive adhesive layer according to the present invention, a pressure-sensitive adhesive is provided on the release agent-coated surface of release paper described below, and the pressure-sensitive adhesive surface and the surface of the recording sheet on which the gloss-developing layer is not coated are overlapped and pressed. Although a method of pressure bonding with a roll or the like is generally performed, an adhesive may be first applied to the recording sheet and then bonded to a release paper. A rubber-based or acrylic resin-based adhesive can be used as the adhesive. The main rubber-based raw material is natural rubber or styrene-butadiene rubber. In natural rubber, a rosin-based resin and a plasticizer are added, and normally hexane is used as a solvent for coating. In addition, styrene
When butadiene rubber is used as the main raw material, it is melted before coating. The acrylic resin system is produced by polymerizing acrylic monomers such as 2-ethylhexyl acrylate, butyl acrylate, ethyl acrylate, acrylic acid and β-hydroxyethyl acrylate. Depending on the method of polymerization, an organic solvent such as ethyl acetate or toluene may be used, or an emulsion type polymerized while emulsifying in water with a surfactant may be used.

Further, in order to improve the physical properties such as heat resistance and solvent resistance of the pressure-sensitive adhesive, the above-mentioned raw materials are isocyanate-based,
The crosslinking reaction may be carried out using a melamine-based or metal chelate-based crosslinking agent, or a pigment such as silica, kaolin, clay, calcium carbonate, aluminum hydroxide, melamine resin particles, or starch particles may be added, or water-soluble Polymers, petroleum resins, various paraffin waxes, fatty acids or their derivatives,
Higher alcohols, metal soaps, silicones, as well as antistatic agents, thickeners, dispersants, preservatives, antioxidants,
An antifoaming agent or the like may be added. These pressure-sensitive adhesives may be selected according to the use of the inkjet recording sheet.

The apparatus for providing the adhesive layer includes an air knife coater, blade coater, bar coater, roll coater, slot nozzle, slot die, rotary screen printer, gravure coater, offset gravure coater, hot melt wheel, spiral sprayer, etc. However, the type and amount of the pressure-sensitive adhesive to be applied, the necessity of imparting a pattern to the pressure-sensitive adhesive applied, and the like may be appropriately selected according to the application.

The base material of the release paper includes high-quality paper, kraft paper, glassine paper, plastic film and the like, and a silicone resin is applied as a release agent on these base materials. In the case of a paper-based substrate, the releasability is improved by laminating a thermoplastic resin on the substrate to obtain a smooth surface.
The one directly coated with a silicone resin on a paper substrate is called a direct type, the one coated with a thermoplastic resin on a paper substrate is called a poly-laminate type, and the one directly coated on a plastic film is called a film type,
The criteria for selecting the release paper from each are that the release paper has an adhesive force that does not peel off during transportation in the inkjet recording device, and that the adhesive force is not more than the peeling force of the labeler when the label is attached by an automatic labeler. Is to be. Therefore, it suffices to select a release paper suitable for the application, and if it is necessary to secure the curl aptitude, the back surface treatment is performed on the opposite surface of the base material coated with the silicone resin.
It is preferable to laminate a thermoplastic resin or coat a synthetic resin. Further, a non-silicone release agent may be used for special applications.

In the present invention, a pigment having a refractive index of 1.60 or more is contained in any of the above-mentioned coating layer, adhesive layer or support. Although the content is not particularly limited, it is set so that the opacity of the label provided with the gloss development layer and the adhesive layer is 80% or more.

Pigments having a refractive index of 1.60 or more include barium sulfate (refractive index 1.63), magnesium oxide (refractive index 1.74), rutile titanium dioxide (refractive index 2.7),
Anatase type titanium dioxide (refractive index 2.5), zinc white (refractive index 2.0), zinc sulfide (refractive index 2.4), lead white (refractive index 2.0), calcined kaolin (refractive index 1.62) ) And the like. Among them, pigments having a refractive index of 2.0 or more are preferable, and titanium dioxide pigments are particularly preferable.

The opacity of the label can be improved by incorporating these pigments into either the coating layer, the adhesive layer or the support. However, when it is contained in the coating layer, the density of the inkjet image is lowered, which is not preferable. Further, although it can be contained in the adhesive layer, when it is contained in the adhesive layer, the adhesive strength may be lowered. The most preferable method is to incorporate it in the support. There are various methods for incorporating it into the support, but in the case of a paper support, it can be incorporated by internally adding it as a filler at the time of papermaking or by adhering it to the surface with a size press device.
Further, one of the methods is to apply these pigments and an adhesive on a support.

[0050]

EXAMPLES Examples of the present invention will be described below, but the present invention is not limited to these examples.
In addition, "parts" and "%" shown in the examples are parts by mass and% by mass of solid content or substantial components unless otherwise specified.
Indicates.

<Preparation of Support A> 80 parts of hardwood bleached kraft pulp (beating degree of 400 mlcsf) and 20 parts of softwood bleached kraft pulp (beating degree of 450 mlcsf) to 100 parts of wood pulp, and 7 parts of anatase type titanium dioxide pigment. After preparing 0.10 part of a commercially available alkyl ketene dimer and 0.05 part of a commercially available cationic acrylamide having a molecular weight of 5,000,000, papermaking was performed with a Fourdrinier paper machine. On the way, starch (MS3800: manufactured by Nippon Shokuhin Kogyo Co., Ltd.) was size-pressed and dried with a solid content adhesion amount of 2.0 g / m ² . Then, it is flattened using a calendar device, and the basis weight is 64 g.
A support A of / m ² was obtained.

<Preparation of Support B> To 100 parts of wood pulp consisting of 80 parts of hardwood bleached kraft pulp (beating degree of 400 mlcsf) and 20 parts of softwood bleached kraft pulp (beating degree of 450 mlcsf), 7 parts of talc pigment, commercial alkyl After preparing 0.10 part of ketene dimer and 0.05 part of a commercially available cationic acrylamide having a molecular weight of 5,000,000,
Paper was made with a Fourdrinier paper machine. On the way, starch (MS3800: manufactured by Nippon Shokuhin Kogyo Co., Ltd.) was size-pressed and dried with a solid content adhesion amount of 2.0 g / m ² . Then, it was flattened using a calendar device to obtain a support B having a basis weight of 64 g / m ² .

<Preparation of Support C> 100 parts of wood pulp consisting of 80 parts of hardwood bleached kraft pulp (beating degree of 400 mlcsf) and 20 parts of softwood bleached kraft pulp (beating degree of 450 mlcsf) to 5 parts of anatase type titanium dioxide pigment. After preparing 0.10 part of a commercially available alkyl ketene dimer and 0.05 part of a commercially available cationic acrylamide having a molecular weight of 5,000,000, papermaking was performed with a Fourdrinier paper machine. On the way, starch (MS3800: manufactured by Nippon Shokuhin Kogyo Co., Ltd.) was size-pressed and dried with a solid content adhesion amount of 2.0 g / m ² . Then, it is flattened using a calendar device and the basis weight is 83 g.
A support C of / m ² was obtained.

<Preparation of Coating Solution A for Gloss Generating Layer> As inorganic fine particles, 100 parts of Snowtex 50 (colloidal silica, average diameter 20 to 30 nm, manufactured by Nissan Chemical Industries, Ltd.), styrene-butadiene latex (trade name JSR Latex 0693, Average particle size 135 nm, made by JSR) 30 parts,
Using 2 parts of commercially available potassium oleate, the solid content concentration is 25
% To adjust the pH to 8.5 to prepare a glossy layer coating solution A.

<Preparation of coating liquid B for expressing glossiness layer> As inorganic fine particles, 200 V (gas phase method silica, average diameter 12 nm, made by Nippon Aerosil) 100 parts, styrene-butadiene latex (trade name JSR latex 0693, average particle diameter) A gloss developing layer coating solution B was prepared by using 30 parts of 135 nm, manufactured by JSR) and 2 parts of commercially available potassium oleate to adjust the solid content concentration to 25% and the pH to 8.5.

<Preparation of Coating Solution C for Gloss Development Layer> Pseudo-boehmite (alumina hydrate, major axis 80 nm) as inorganic fine particles
100 parts, styrene-butadiene latex (trade name JSR latex 0693, average particle diameter 135 nm, J
SR) (30 parts) and commercially available potassium oleate (2 parts) were used to adjust the solid content concentration to 25% and the pH to 8.5 to prepare a gloss developing layer coating liquid C.

<Preparation of Coating Solution D for Gloss Development Layer> 100 parts of fan seal X37B (synthetic amorphous silica, average diameter 3.6 μm, manufactured by Tokuyama Corp.) as inorganic fine particles, styrene-butadiene latex (trade name JSR). Latex 0693, average particle size 135 nm, made by JSR) 30
And 2 parts of commercially available potassium oleate were used to prepare a gloss developing layer coating liquid D by adjusting the solid content concentration to 25% and the pH to 8.5.

<Preparation of Coating Solution E for Gloss Generating Layer> As inorganic fine particles, 200 V (gas phase method silica, average diameter 12 nm, made by Nippon Aerosil) 97 parts, anatase type titanium dioxide (KA-10: made by Titanium Industry Co., Ltd.) 3 Part, styrene-butadiene latex (trade name JSR latex 069
3, average particle diameter 135 nm, manufactured by JSR) 30 parts, commercially available potassium oleate 2 parts, solid content concentration 25%, p
The gloss developing layer coating liquid E was prepared by adjusting so as to be H8.5.

<Preparation of Ink Receptive Layer Coating Liquid a> 97 parts of synthetic amorphous silica (Fanseal X37B: manufactured by Tokuyama Corporation), anatase type titanium dioxide (KA-10:
3 parts by Titanium Industry Co., Ltd. and polyvinyl alcohol (PVA
117: made by Kuraray Co., Ltd.) 30 parts, cationic dye fixing agent (Sumiraze resin 1001: made by Sumitomo Chemical Co., Ltd.) 20
To prepare an ink receiving layer coating liquid a by adjusting the composition of parts to prepare a solid content concentration of 13%.

<Preparation of Ink Receptive Layer Coating Liquid b> 100 parts of synthetic amorphous silica (Fanseal X37B: manufactured by Tokuyama Corporation) and polyvinyl alcohol (PVA117:
30 parts of Kuraray Co., Ltd.) and 20 parts of a cationic dye fixing agent (SUMIREZ RESIN 1001: Sumitomo Chemical Co., Ltd.) were prepared and adjusted to a solid concentration of 13% to coat the ink receiving layer. A working solution b was prepared.

Example 1 On the above-mentioned support A, the coating solution A for producing the gloss layer was applied by a roll coater on the support so that the dry coating amount was 15 g / m ^2, and then cast treatment was carried out. It was The casting treatment was carried out by a direct method in which a mirror surface roll heated to a surface temperature of 90 ° C. was pressed and dried 2 seconds after the coating of the coating liquid for the gloss developing layer. Next, a commercially available silicone resin was applied to the glassine paper with a gravure coater so as to have a concentration of 1.0 g / m ^2, and then a commercially available water-based acrylic emulsion type pressure-sensitive adhesive was dried on the silicone resin application side to a coating amount of 10 g / m 2. ^{Then, the} surface coated with the pressure-sensitive adhesive and the opposite surface of the support coated with the gloss-developing layer were bonded together by a press roll to obtain a recording sheet of Example 1 having a pressure-sensitive adhesive layer.

Example 2 In Example 1, the coating liquid A for the gloss-developing layer was added to the gloss-developing layer B.
A recording sheet of Example 2 was obtained in the same manner as in Example 1 except that

Example 3 In Example 1, the coating solution A for the gloss-developing layer was added to the gloss-developing layer C.
A recording sheet of Example 3 was obtained in the same manner as in Example 1 except that the recording sheet was replaced with.

Example 4 In Example 1, the coating liquid A for the gloss-developing layer was added to the gloss-developing layer D.
A recording sheet of Example 4 was obtained in the same manner as in Example 1 except that

Example 5 In the same manner as in Example 1 except that the support A was replaced with the support B and the gloss developing layer coating solution A was replaced with the gloss developing layer E in Example 1, A recording sheet of Example 5 was obtained.

Comparative Example 1 A recording sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that the support A was replaced with the support B.

Comparative Example 2 A recording sheet of Comparative Example 2 was obtained in the same manner as in Example 2 except that the support A was replaced with the support B.

Comparative Example 3 A recording sheet of Comparative Example 3 was obtained in the same manner as in Example 3 except that the support A was replaced with the support B.

Comparative Example 4 A recording sheet of Comparative Example 4 was obtained in the same manner as in Example 4 except that the support A was replaced with the support B.

Example 6 The support B was coated with the ink-receiving layer coating liquid a on the surface of the support by an air knife coater so that the dry coating amount was 10 g / m ^2, and was applied by a super calender device. A smoothing process was performed. Further, the gloss developing layer coating liquid A was dried on the coated surface by a roll coater to give a dry coating amount of 10 g / m ²
After coating so as to be, a cast treatment was performed. Casting is performed with a surface temperature of 9 seconds 2 seconds after applying the coating liquid for the glossy layer.
It was carried out by a direct method in which a mirror surface roll heated to 0 ° C. was pressed and dried. Next, a commercially available silicone resin was applied to the glassine paper with a gravure coater so as to have a concentration of 1.0 g / m ^2, and then a commercially available water-based acrylic emulsion type pressure-sensitive adhesive was dried on the silicone resin application side to a coating amount of 10 g / m 2.
^{Then, the} surface coated with the pressure-sensitive adhesive and the opposite surface of the support coated with the gloss-developing layer were stuck together by a press roll to obtain a recording sheet of Example 6 having a pressure-sensitive adhesive layer.

Example 7 In Example 6, the coating liquid A for the gloss-developing layer was added to the gloss-developing layer B.
A recording sheet of Example 7 was obtained in the same manner as in Example 6 except that

Example 8 In Example 6, the gloss developing layer coating solution A was added to the gloss developing layer C.
A recording sheet of Example 8 was obtained in the same manner as in Example 6 except that

Example 9 In Example 6, the coating liquid A for the gloss-developing layer was added to the gloss-developing layer D.
A recording sheet of Example 9 was obtained in the same manner as in Example 6 except that

Comparative Example 5 A recording sheet of Comparative Example 5 was obtained in the same manner as in Example 6, except that the ink receiving layer coating liquid a was replaced with the ink receiving layer coating liquid b. .

Comparative Example 6 A recording sheet of Comparative Example 6 was obtained in the same manner as in Example 7, except that the ink receiving layer coating liquid a was replaced with the ink receiving layer coating liquid b. .

Comparative Example 7 A recording sheet of Comparative Example 7 was obtained in the same manner as in Example 8 except that the ink receiving layer coating liquid a was replaced with the ink receiving layer coating liquid b. .

Comparative Example 8 A recording sheet of Comparative Example 8 was obtained in the same manner as in Example 9 except that the ink receiving layer coating liquid a was replaced with the ink receiving layer coating liquid b. .

Example 10 The gloss developing layer coating solution A was coated on the above-mentioned support B by a roll coater so that the dry coating amount was 15 g / m ^2, and then cast treatment was performed. The casting treatment was carried out by a direct method in which a mirror surface roll heated to a surface temperature of 90 ° C. was pressed and dried 2 seconds after the coating of the coating liquid for the gloss developing layer. Next, glassine paper with 1.0 g / m of commercially available silicone resin
After coating with a gravure coater so that the ^2, so that a solution obtained by dispersing 5 parts of rutile titanium dioxide and dry coating amount 10 g / m ² to a commercially available aqueous acrylic emulsion type pressure-sensitive adhesive to the silicone resin coating surface Then, the surface coated with the pressure-sensitive adhesive and the opposite surface of the support coated with the gloss-developing layer were laminated with a press roll to obtain a recording sheet of Example 10 having a pressure-sensitive adhesive layer containing titanium dioxide.

Example 11 A recording sheet of Example 11 was obtained in the same manner as in Example 10 except that the gloss developing layer coating solution A was replaced with the gloss developing layer B.

Example 12 A recording sheet of Example 12 was obtained in the same manner as in Example 10 except that the gloss developing layer coating liquid A was replaced with the gloss developing layer C.

Example 13 A recording sheet of Example 13 was obtained in the same manner as in Example 10, except that the gloss developing layer coating solution A was replaced with the gloss developing layer D.

Example 14 A recording sheet of Example 14 was obtained in the same manner as in Example 3 except that the support A was replaced with the support C.

<Opacity> The opacity was measured in accordance with JIS P8138, except that the release paper of the recording sheet was peeled off and adhered to cellophane paper as a test piece.

<Glossiness> The specular glossiness of the surface of the cast gloss-developing layer was measured. The gloss is JIS
According to Z8741, it was measured with a variable angle gloss meter (VGS-1001DP) manufactured by Nippon Denshoku Industries Co., Ltd. with an entrance reflection angle of 75 degrees. When the glossiness exceeds 60%, a high gloss feeling is obtained.

<Image coloring property> An inkjet printer (PM800C: manufactured by Seiko Epson Corporation) was used to print a heavy-color rectangular pattern with cyan ink and magenta ink, and the optical reflection density of the printed portion was measured with a Macbeth RD-918 model. It was measured. If the printing density is 1.70 or more, an image with good color development can be obtained.

<Hiding power> A recording sheet having a barcode printed thereon is stuck on an adherend having a barcode printed thereon, and the printed barcode is read by a barcode reader 10
The continuous reading was performed 0 times. The case where no mistake was made in reading was marked as ○, and the case where a mistake was made even once was marked as ×.

<Adhesiveness> The adhesive surface of a recording sheet was attached to the surface of a steel cylinder having a diameter of 200 mm and left for 30 days. When the edge of the recording sheet did not peel at all, it was rated as ◯, when the edge was rubbed, it was easily peeled, but when it did not peel, it was rated as Δ, and when spontaneous peeling occurred, it was rated as x.

[0088]

[Table 1]

From the results shown in Table 1, in Examples 1 to 14 in which the coating layer or the pressure-sensitive adhesive layer of the present invention or the support contains a pigment having a high refractive index, the surface of the adherend has a good hiding property. A recording sheet is obtained. In particular, in Examples 1 to 4 in which the support contains a titanium dioxide pigment, a recording sheet having good color developability and high opacity and thus good concealability can be obtained. However, Examples 10 to 10 in which titanium dioxide was added to the adhesive layer
13 and Example 14 in which the support basis weight exceeds 80 g / m ² , the tackiness is slightly reduced.

[0090]

As described above, according to the present invention, it is possible to obtain a recording sheet having excellent image coloring property and excellent concealing property of the surface of an adherend, and since an adhesive layer is provided on the back surface, it can be easily attached to a wide range of objects. It is possible to provide a label for ink-jet recording having high performance.

Claims (5)

[Claims] 1. An ink jet recording label comprising at least one coating layer provided on one surface of an air-permeable support, the outermost layer of which is a gloss-developing layer, and an adhesive layer provided on the opposite side thereof. The gloss-developing layer is brought into a mirror-gloss finish by being brought into pressure contact with a heated mirror-surface roll while the gloss-developing layer is in a wet state, and is refracted to any of the coating layer, the adhesive layer or the air-permeable support. An inkjet recording label comprising a pigment having a ratio of 1.60 or more and having an opacity of 80% or more. 2. The ink jet recording label according to claim 1, wherein the air-permeable support is paper containing wood pulp as a main component, and the basis weight thereof is 80 g / m ² or less. 3. The gloss-developing layer contains inorganic fine particles,
The inkjet recording label according to claim 1 or 2, wherein the inorganic fine particles have an average diameter of 100 nm or less. 4. The label for ink jet recording according to claim 3, wherein the inorganic fine particles are at least one selected from alumina compounds, colloidal silica and vapor phase method silica. 5. The label for ink jet recording according to claim 1, wherein the pigment having a refractive index of 1.60 or more is titanium dioxide.