JPH08207424A - Ink jet recording sheet - Google Patents

Abstract

PURPOSE: To obtain an ink jet recording sheet having good decorative properties and a high conspicuousness. CONSTITUTION: An ink-accepting layer is provided on at least one surface of a substrate. A metallized film cut to be finely divided and an adhesive are contained in the ink-accepting layer. The ink-accepting layer other than the metallized film has a transparency of 70% or more.

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 sheet for recording with ink, and more particularly to an ink jet recording sheet having a good decorative effect and a high eye-catching effect.

[0002]

2. Description of the Related Art The ink jet recording system is a system in which minute droplets of ink are ejected by various operating principles to adhere to a recording sheet such as paper to record images, characters, etc., but at 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. Furthermore, the image formed by the multicolor inkjet method is
Compared to multicolor printing by plate making method and printing by color photographic method, it is possible to obtain recording comparable to that. Further, in applications requiring a small number of copies, it is being widely applied to the field of full-color image recording because it is cheaper than the photographic technique.

Originally, most of the ink jet recording sheets were used for monochrome printing as represented by the preparation of document materials for presentations, but in recent years, the recording sheets have become larger in color and larger in size. By adding background recordings such as yellow and red to most of the, the decorative effect and eye-catching effect have increased.

On the other hand, the cut and subdivided metal vapor deposition film (hereinafter referred to as the cut vapor deposition film) has a unique luster and is kneaded into the paint as a highly decorative and highly eye-catching material. Or it was used by spraying on the adhesive surface before drying. Compared with a metal foil having the same metallic luster, it has a higher tensile strength as a film, so that it is easier to handle as a continuous sheet, and it is easy to provide a protective layer on the metal vapor deposition layer and easily improve corrosion resistance. If the cut vapor-deposited film, which has been cut into extremely fine pieces, is used with a binder, it becomes a decorative material with a glossy and decorative effect close to that of gold mud used for Japanese painting, although it has a different structure.

However, when an ink jet recording sheet is prepared by coating the ink receiving layer coating liquid containing the cut vapor deposition film on a support, the glossiness of the cut vapor deposition film is impaired due to the low transparency of the ink receiving layer. As a result, there is a problem that the decorativeness and the eye-catching effect are reduced.

It is also conceivable to apply a thin adhesive such as glue on the support and spray the cut vapor deposition film before it is dried. In this case, the cut vapor deposition film is completely exposed on the surface. However, there is a problem that a clear image cannot be obtained because the ink is repelled during printing.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to improve the conventional problems in the above technical field.

In particular, the present invention relates to an ink jet recording sheet having a good decorative effect and a high eye-catching effect.

[0009]

Means for Solving the Problems As a result of intensive studies for solving the above-mentioned problems, the present inventors have found that an ink receiving layer contains a metal vapor-deposited film that has been cut and subdivided and an adhesive, and It was found that when the transparency of the ink receiving layer excluding the vapor-deposited film is 70% or more, an inkjet recording sheet having good decorativeness and a high eye-catching effect can be obtained, and the inkjet recording sheet of the present invention is invented. Came to.

That is, the present invention provides an ink jet recording sheet having an ink receiving layer provided on at least one side of a support, wherein the ink receiving layer contains a metal vapor-deposited film that has been cut and subdivided, and an adhesive. The transparency of the ink receiving layer excluding the vapor-deposited film is 70% or more.

In the ink jet recording sheet of the present invention, the content of the metal vapor deposition film is preferably 0.1 to 5% by weight.

Further, in the ink jet recording sheet of the present invention, at least one surface of the metal vapor deposition film is preferably a colored surface.

The ink jet recording sheet of the present invention will be described in detail below.

The cut vapor deposition film used in the present invention is
Generally refers to a film obtained by cutting and subdividing a metal vapor deposition film. The metal vapor-deposited film is, for example, pages 12 to 17 of the magazine "Convertec", September 1987, or also "Convertec", July 1988, 57 to 66.
As shown on the page, the base material is polyester (PET), nylon, polyvinyl chloride, polycarbonate, unstretched polypropylene, stretched polypropylene, polyethylene, and in some cases, paper, etc., and most of the metal evaporated is aluminum. Accounts for gold, silver,
Copper, chromium, indium, tin, etc. are used. The cut metal vapor deposition film is sometimes referred to as a cut vapor deposition or a cut vapor deposition film under the trade name (for example, a product of Tokyo Reiko Co., Ltd.).

The grain size of the cutting is about 300 mesh to 20 mm, and any shape such as square, rectangle, rhombus, circle, ellipse, fiber, hair, star, triangle, or irregular shape may be used. Absent. When the cut vapor-deposited film is not exactly cut, but is made from a metal vapor-deposited film by a punching method, it may be referred to as a spangle, but in the present invention, the cut metal-deposited film is collectively referred to as a "cut-deposited film". "". As a matter of course, these cut vapor deposition films can be used by mixing various kinds of materials having different shapes, colors and materials.

The thickness of the cut vapor deposition film is 1 to 100 μm.
It is preferably about 1 to 1 in consideration of coating suitability.
The thickness is more preferably 50 μm, and most preferably 1 to 20 μm in view of the recording suitability and surface smoothness of the final inkjet recording sheet. If necessary, a protective layer may be provided on the vapor deposition surface.

Although not a metal-deposited cut vapor-deposited film, a synthetic vapor-deposited film obtained by co-extruding synthetic resins having different refractive indexes to develop a glossy feeling (trade name: Marl film, etc.) is used. You can use it instead of.

The content of the cut vapor deposition film in the ink receiving layer is preferably 0.1 to 5% by weight. When the content is less than 0.1% by weight, it is not preferable because an inkjet recording sheet that makes use of the glossy feel and texture of the cut vapor deposition film cannot be obtained. Further, when the content exceeds 5% by weight, most of the surface of the recording sheet is covered with the cutting film, so that the ink is different from the offset printing in which the ink is easily held on the surface of the printing paper, and the ink is in the depth direction of the recording sheet. Inkjet recording is not preferable because the color tone of the recording sheet is likely to be reflected on the printed image due to the permeation of the ink into the printed image, because the visibility of the printed characters and images is reduced.

Further, in the present invention, when at least one side of the cut vapor deposition film is a colored surface, the gloss and texture of the cut vapor deposition film are further enhanced, so that the decorativeness and the appearance of the recording sheet are inevitably increased. Is even more effective.

In the present invention, the transparency (%) means "10".
0- (opacity value) ". The opacity value is
Opacity (%) measured by A method of JIS P8138
Is. The thickness is a value measured by a method for testing the thickness and density of paper and paperboard according to JIS P8118.

In the present invention, when the transparency of the ink receiving layer excluding the metal vapor deposition film is 70% or more, an ink jet recording sheet utilizing the gloss and texture of the cut vapor deposition film can be obtained, and the transparency is particularly 90.
% Or more is preferable. When the transparency of the ink receiving layer is less than 70%, the cut vapor deposition film contained in the ink receiving layer becomes difficult to see, and glossiness and texture cannot be utilized, which is not preferable.

As the adhesive in the present invention, starch derivatives such as oxidized starch, etherified starch and phosphoric acid esterified starch; cellulose derivatives such as carboxymethyl cellulose and hydroxyethyl cellulose; casein, gelatin, soybean protein, polyvinyl alcohol or its derivatives. Conjugated diene copolymer latex such as polyvinylpyrrolidone, maleic anhydride resin, styrene-butadiene copolymer, methylmethacrylate-butadiene copolymer; acrylic such as acrylic acid ester and methacrylic acid ester polymer or copolymer Acrylic polymer latex such as polymer-based polymer; Vinyl-based polymer latex such as ethylene-vinyl acetate copolymer; or functional group-modified polymer latex with functional group-containing monomer such as carboxy group of these various polymers Scan; melamine resins, water-based adhesives such as thermosetting synthetic resins such as urea resins; polymer or copolymer resin of methacrylic acid esters; acrylic acid esters such as polymethyl methacrylate polyurethane resin,
Examples thereof include unsaturated polyester resins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral, alkyd resins, and other synthetic resin adhesives.

The solid content of the adhesive is 100.
3 to 70 parts by weight, preferably 5 to 5 parts by weight
The amount is 0 parts by weight, and if it is less than 3 parts by weight, the coating strength of the ink receiving layer is insufficient, and if it exceeds 70 parts by weight, the ink absorbency is lowered.

In the ink receiving layer of the present invention, one or more known white pigments may be used in order to improve ink absorbency and ink color reproducibility. For example, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate , Synthetic amorphous silica, colloidal silica, alumina, colloidal alumina, pseudo-boehmite, aluminum hydroxide, lithopone, zeolite,
Examples include white inorganic pigments such as hydrohalloysite and magnesium hydroxide, styrene plastic pigments, acrylic plastic pigments, organic pigments such as polyethylene, microcapsules, urea resins and melamine resins.

Further, in the ink receiving layer, as an additive, a dye fixing agent, a pigment dispersant, a thickener, a fluidity improving agent,
Defoamer, foam suppressor, release agent, foaming agent, penetrant, coloring dye,
Coloring pigments, fluorescent whitening agents, ultraviolet absorbers, antioxidants, preservatives, antifungal agents, water resistance agents, wet paper strength enhancers, dry paper strength enhancers and the like can be appropriately added.

In particular, a secondary amine which forms an insoluble salt with a sulfonic acid group, a carboxyl group, an amino group, etc. in a water-soluble direct dye or a water-soluble acidic dye which is a dye component of an aqueous ink,
When a cationic dye fixing agent composed of a tertiary amine and a quaternary ammonium salt is blended, the dye is captured in the ink receiving layer, so that the color is improved and the ink is dropped by water absorption due to the formation of an insoluble salt. It is preferable because it suppresses the flow and bleeding of water.

The coating amount of the ink receiving layer is 1 g / m ² or more, although it depends on the required gloss, ink absorbency, type of support and the like. In addition, the ink receiving layer can be applied by dividing a certain coating amount into two steps.
The gloss is improved as compared with the case where the coating amount is applied every time.

The ink receiving layer is applied by various machines such as various 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 flattening finish using a calendar device such as a machine calendar, a TG calendar, a super calendar and a soft calendar.

The coating amount of the ink receiving layer in the present invention is not particularly limited, but is preferably 1 to 30 g / m ² . When the coating amount is less than 1 g / m ^2, it is not preferable because sufficient printing density and ink absorbency cannot be obtained, and when the coating amount exceeds 30 g / m ² , curling property of the recording sheet is deteriorated, which is not preferable. . In addition, the ink receiving layer can be applied with a certain coating amount divided into several times, and in the case of imparting gloss, the gloss is improved as compared with applying the coating amount at once. .

The support used in the present invention is LB
Chemical pulp such as KP, NBKP, GP, PGW, RM
P, TMP, CTMP, CMP, CGP and other mechanical pulps, DIP and other waste paper pulps and other wood pulps and conventionally known pigments as main components, and binders and sizing agents and fixing agents, retention aids, cationizing agents, Starch, polyvinyl alcohol, and base paper manufactured by various devices such as Fourdrinier paper machine, cylinder paper machine, twin wire paper machine, etc. Base paper with a size press or anchor coat layer on it, art paper with a coat layer on them,
It also includes coated paper such as coated paper and cast coated paper.
Such a base paper and a coated paper may be provided with the coating layer according to the present invention as they are, or a calender device such as a machine calender, a TG calender or a soft calender may be used for the purpose of controlling the flatness. . Further, a plastic film such as a polyester film and a cellulose acetate film, a synthetic paper such as a foamed polyolefin synthetic paper and a foamed polyester synthetic paper, a polyolefin resin-coated paper, a resin-impregnated paper, a non-woven fabric, and a cloth can also be used. The basis weight of the support is usually 40 to 30.
It is 0 g / m ² , but is not particularly limited.

A back coat layer may be coated on the opposite surface of the ink receiving layer sandwiching the support in order to impart curl aptitude.
Tabular pigments and hydrohaloysite are preferred.

The ink referred to in the present invention means the following colorants,
A recording liquid composed of a liquid medium and other additives.

Examples of the colorant include water-soluble dyes such as direct dyes, acid dyes, basic dyes, reactive dyes and food dyes.

As the solvent of the ink, water and various water-soluble organic solvents such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, sec-butyl alcohol, tert-butyl alcohol and isobutyl are used. Alkyl alcohols having 1 to 4 carbon atoms such as alcohols; amides such as dimethylformamide and dimethylacetamide; ketones or ketone alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; polyethylene glycol, polypropylene glycol, etc. Polyalkylene glycols; ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,6-hexanetriol, thiodiglycol Le, hexylene glycol,
Examples include alkylene glycols having 2 to 6 alkylene groups such as diethylene glycol; lower alkyl ethers of polyhydric alcohols such as glycerin, ethylene glycol methyl ether, diethylene glycol methyl (or ethyl) ether, and triethylene glycol monomethyl ether. Among these many water-soluble organic solvents, polyhydric alcohols such as diethylene glycol and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether are preferable. Other additives include, for example, a pH adjusting agent, a sequestering agent, an antioxidant, a fungicide, a viscosity adjusting agent, a surface tension adjusting agent, a wetting agent, a surfactant, and a rust preventive.

The ink jet recording sheet according to the present invention is not limited to use as an ink jet recording sheet, and may be used as any recording sheet using a liquid ink during recording. For example, an ink sheet in which a heat-fusible ink containing a heat-fusible substance, a dye or pigment as a main component is applied on a thin support such as a resin film, high-density paper, or synthetic paper is heated from the back side to remove the ink An image-receiving sheet for thermal transfer recording that is melted and transferred, an inkjet recording sheet that heat-melts a heat-meltable ink to form fine droplets and performs flight recording, an inkjet recording sheet that uses an ink in which an oil-soluble dye is dissolved in a solvent, photopolymerization An image receiving sheet corresponding to a light and pressure sensitive donor sheet using microcapsules containing a type monomer and colorless or colored dyes and pigments can be mentioned.

The common feature of the above recording sheets is that the ink is in a liquid state at the time of recording. Liquid ink cures,
By solidification or fixing, the ink penetrates or spreads in the depth direction or the horizontal direction of the ink receiving layer of the recording sheet.
The various recording sheets described above require absorptivity according to their respective systems, and the inkjet recording sheet of the present invention may be used as the various recording sheets described above.

Further, the ink jet recording sheet according to the present invention may be used as a recording sheet for heating and fixing toner of the electrophotographic recording system which is widely used in copying machines and printers. It is also possible to apply a pressure-sensitive adhesive layer to the opposite surface of the ink-receiving layer sandwiching the support to apply it to a label.

[0038]

The ink jet recording sheet of the present invention is an ink jet recording sheet in which an ink receiving layer is provided on at least one side of a support, and the cut and subdivided metal vapor deposition film and the adhesive are contained in the ink receiving layer. In addition, the transparency of the ink receiving layer excluding the metal vapor deposition film is 70.
% Or more, and relates to an inkjet recording sheet having good decorativeness and a high eye-catching effect.

[0039]

The present invention will be described in detail below with reference to examples, but the present invention is not limited thereto. In addition,
Parts and% described in the following examples and comparative examples
Are all weight conversion values.

Example 1 A 4 μm thick polyethylene terephthalate film as a cut vapor deposition film was vapor-deposited with aluminum on one side,
It was used after being colored yellow on both sides and then subdivided into 150 meshes. A polyethylene laminated paper having a basis weight of 120 g / m ² was used as a support. The coating composition for the ink receiving layer was 100 parts of colloidal silica (Snowtex C: Nissan Chemical Co., Ltd.), 100 parts of carboxymethyl cellulose (Serogen BSH-12: manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), and a surfactant (Trax K-40: (Made by Nippon Oil & Fats Co., Ltd.) 0.02 parts of these were prepared and mixed with the coating solution so that the cut vapor deposition film became 1.0%, and then dried coating amount was 10 g / m ² with a wire bar. Then, the surface of the support was coated and dried to prepare an inkjet recording sheet of Example 1.

Example 2 The cut vapor-deposited film of Example 1 was subjected to silver vapor deposition on one surface of a polyethylene terephthalate film having a thickness of 12 μm,
An inkjet recording sheet of Example 2 was produced in the same manner as in Example 1 except that a colorless protective layer was provided on the vapor-deposited surface and the back surface, and then it was subdivided into 1 mm square pieces.

Example 3 An ink jet recording sheet of Example 3 was prepared in the same manner as in Example 1 except that the content of the cut vapor-deposited film of Example 1 in the ink receiving layer was changed to 0.08%. did.

Example 4 An ink jet recording sheet of Example 4 was prepared in the same manner as in Example 1 except that the content of the cut vapor deposited film of Example 1 in the ink receiving layer was changed to 6.0%. did.

Example 5 A 20 μm thick polyethylene terephthalate film as a cut vapor deposition film was vapor-deposited with aluminum on one side, and a red colored protective layer was provided on the vapor-deposited surface and the back surface, which was then subdivided into 0.5 mm square pieces. Using. A high-quality paper having a basis weight of 100 g / m ² was used as a support. The coating composition for the ink-receiving layer was synthetic amorphous silica (Fineseal X-37).
B: 50 parts by Tokuyama Soda, polyvinyl alcohol (PV
A117: manufactured by Kuraray Co., Ltd.) 100 parts, and a cationic dye fixing agent (Sumireds resin 1001: manufactured by Sumitomo Chemical Co., Ltd.) 20 parts were prepared and mixed with the coating liquid so that the cut vapor deposition film was 2.0%. After that, an inkjet recording sheet of Example 5 was prepared by coating and drying the surface of the support with a wire bar so that the dry coating amount was 10 g / m ² .

Comparative Example 1 A 12 μm-thick polyethylene terephthalate film as a cut vapor-deposited film was vapor-deposited with aluminum on one surface, and a yellow transparent protective layer was provided on the vapor-deposited surface and the back surface, which was then subdivided into 0.3 mm × 5 mm. Using. A high-quality paper having a basis weight of 100 g / m ² was used as a support. The coating composition for the ink-receiving layer is synthetic amorphous silica (Fineseal X-
37B: Tokuyama Soda) 80 parts, polyvinyl alcohol (PVA117: Kuraray) 70 parts, cationic dye fixing agent (SUMIREZ RESIN 1001: Sumitomo Chemical Co., Ltd.) 20 parts, and these were prepared and cut and vapor deposited on this coating liquid. The film was mixed so as to have a concentration of 2.0%, and then coated and dried on a support surface with a wire bar so that the dry coating amount was 10 g / m ² , to prepare an inkjet recording sheet of Comparative Example 1.

Comparative Example 2 An ink jet recording sheet of Comparative Example 2 was prepared in the same manner as in Example 1 except that the coating liquid for ink receiving layer of Example 1 did not contain the cut vapor deposition film.

Comparative Example 3 A 4 μm thick polyethylene terephthalate film as a cut vapor deposition film was vapor-deposited with aluminum on one side,
It was used after being colored yellow on both sides and then subdivided into 150 meshes. A polyethylene laminated paper having a basis weight of 120 g / m ² was used as a support. The coating composition for the ink receiving layer was 100 parts of colloidal silica (Snowtex C: Nissan Chemical Co., Ltd.), 100 parts of carboxymethyl cellulose (Serogen BSH-12: manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.), and a surfactant (Trax K-40: (Made by Nippon Oil & Fats Co., Ltd.) 0.02 parts of these were prepared and dried with a wire bar to give a coating amount of 10
It was coated on the surface of the support so as to be g / m ² . Then, before the coating liquid was dried, the cut vapor deposition film was sprayed with an air gun so that the spray amount was 1 g / m ^2, and dried to prepare an inkjet recording sheet of Comparative Example 3.

The evaluation of Examples 1 to 5 and Comparative Examples 1 to 3 was carried out by the following method, and the results are shown in Table 1. still,
The measurement and evaluation were performed under the environment specified in JIS P8111.

1) Transparency The transparency (%) of the ink receiving layer is the coating liquid obtained by removing the cut vapor deposition film from the coating liquid used in Examples and Comparative Examples.
The polypropylene film that had been subjected to the easy peeling treatment was coated, dried, and peeled so that the coating amount was the same. The transparency was expressed by 100- (opacity value) by measuring the opacity with a Hunter colorimetric photometer (manufactured by Toyo Seiki) based on the method A of JIS P8138.

2) Decorative property The glossiness of the cut vapor deposition film in the obtained ink jet recording sheet was visually evaluated. In addition, the evaluation is ⊚ when the gloss is very high and the decorativeness is remarkably good by coloring, ◯, when the gloss is high and the decorativeness is good, and when the gloss is low and the decorativeness is inferior, it is cut. Since there was no vapor-deposited film and there was no glossy feeling, there was no decorativeness, and it was evaluated as x.

3) Visibility A black character was printed on the obtained ink jet recording sheet by an IRIS ink jet printer (SmartJet 3012), and the visibility of the character was visually evaluated. In addition, the evaluation was evaluated as ◯ when the visibility was high, Δ when the visibility was slightly low, and x when the visibility was low.

[0052]

[Table 1]

As is clear from Table 1, the ink jet recording sheets of Examples 1 to 5 contained the cut vapor deposition film and the adhesive in the ink receiving layer, and the transparency of the ink receiving layer was 70% or more. Therefore, the decorativeness was good and the eye-catching effect was high. Further, as is clear from Examples 1 and 2, the decorative properties of the inkjet recording sheet colored with the cut vapor deposition film were further improved.
Further, as is clear from Examples 1, 3 and 4, the content of the cut vapor-deposited film in the ink receiving layer was 0.1 to 0.1%.
The inkjet recording sheet in the range of 5% by weight is
The glossiness was high, the decorativeness was even better, and the visibility of the characters printed on the recording sheet was high.

On the other hand, in the ink jet recording sheet of Comparative Example 1, since the transparency of the ink receiving layer is less than 70%,
The cut vapor-deposited film had a reduced glossiness and the recording sheet had a poor decorative property. Further, the inkjet recording sheet of Comparative Example 2 did not contain the cut vapor deposition film in the ink receiving layer, and thus the decorative property of the recording sheet was inferior. Further, in the ink jet recording sheet of Comparative Example 3, the cut vapor deposition film was sprayed on the surface of the ink receiving layer, so that the ink was repelled during printing, so that the visibility of the characters printed on the recording sheet was poor.

[0055]

INDUSTRIAL APPLICABILITY According to the present invention, the ink-receiving layer having a transparency of 70% or more contains a metal vapor-deposited film that has been cut and subdivided, and an adhesive, so that the decorative property is good and the eye-catching effect is high. An inkjet recording sheet can be obtained.

Claims (3)

[Claims] 1. An ink jet recording sheet having an ink receiving layer provided on at least one side of a support, wherein the ink receiving layer contains a metal vapor-deposited film that has been cut and subdivided and an adhesive, and excludes the metal vapor-deposited film. An ink jet recording sheet, wherein the transparency of the ink receiving layer is 70% or more. 2. The content of the metal vapor deposition film is 0.1-0.1%.
The ink jet recording sheet according to claim 1, which is 5% by weight. 3. At least one surface of the metal vapor deposition film,
The colored surface is a colored surface.
The inkjet recording sheet described.