JPH11268450A - Recording paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recording paper which shows smooth conveying properties regardless of the type of a printer with regard to a recording paper which can be attached to another paper such as a postcard with sufficient adhesive strength. SOLUTION: This recording paper has at least, one layer or more of an ink receiving layer on one of the faces of a support and a heat-sealable layer or a delayed tacky layer containing an organic pigment at a melt point or a softening point of 170 deg.C on the other face. In this case, the coefficient of dynamic friction of the surface of the heat-sealable layer or the delayed tacky layer to the surface of the ink receiving layer, is 0.8 or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to bond a recording paper having an ink receiving layer capable of ink jet recording or thermal transfer recording to other high quality paper, coated paper, nonwoven fabric, synthetic resin sheet, glass, metal or the like. More particularly, the present invention relates to a heat-adhesive recording paper that has good transportability and does not cause double feeding or paper jam during printing on a printer.

[0002]

2. Description of the Related Art Ink-jet recording is a method in which fine droplets of ink are made to fly and adhere to recording paper such as paper by various operating principles to record images and characters. Features include easy multi-coloring, great flexibility in recording patterns, and no need for development-fixing.
It is rapidly spreading in various applications as a recording device for various figures and color images including kanji. further,
Images formed by the multi-color ink jet method can obtain a record comparable to multi-color printing by the plate making method. In addition, in applications requiring a small number of copies, it is being widely applied to the field of full-color image recording because of its low cost.

As recording paper used in the ink jet recording system, efforts have been made in terms of apparatuses and ink compositions in order to use high-quality paper or coated paper used for ordinary printing and writing. However, with the improvement of the performance of ink jet recording apparatuses such as high-speed, high-definition and full-color apparatuses, and expansion of applications, more advanced characteristics are required for recording paper. That is, as the recording paper, the density of the print dots is high, the color tone is bright and vivid, the ink does not flow out or bleeds even when the print dots overlap quickly, and the print dots are printed in the horizontal direction. Is required to have high image reproducibility such that the diffusion of the image is not unnecessarily large and the periphery is smooth and not blurred. That is, in order to obtain a good image, general high-quality paper or coated paper for printing is insufficient, and a recording paper having a dedicated ink receiving layer of an ink jet recording method is indispensable.

In recent years, as a means of hard copying, a computer, a word processor, etc., which are advantageous in that a device utilizing a thermal transfer recording system is lightweight, inexpensive, compact, noise-free, and excellent in operability and maintainability. It is widely used as a recording method. The thermal transfer recording system is roughly classified into a fusion type and a sublimation type. The principle of a fusion type thermal transfer recording type printer is that an image is converted into an electric signal, and the electric signal is further converted into a heat signal by a thermal head. Heat the ink donor sheet)
Information is recorded by transferring a dye from a melt-type ink donor sheet to an ink receiving layer of a recording sheet for thermal transfer. Further, the sublimation type thermal transfer recording method is excellent in reproducibility of a multi-color gradation image, and is printed using a sublimation type thermal transfer type printer. The principle of such a printer of the sublimation type thermal transfer system is to convert an image into an electric signal, and further convert the electric signal into a heat signal by a thermal head.
A heat transfer medium coated with a heat transferable dye (hereinafter referred to as a sublimation type ink donor sheet) is heated, and then sublimated or diffused in the medium, from the sublimation type ink donor sheet to the ink receiving layer of the sublimation type thermal transfer recording paper. The information is recorded by transferring the dye.

When a color image is output by an ink jet recording method or a thermal transfer recording method, a single color yellow,
Multi-tone image dots of magenta, cyan, and black are superimposed and printed in a plane-sequential manner, whereby red,
It forms images of green, blue, and many other neutral hues and densities to form natural color photographic images.

[0006] As an application for individuals with a small number of copies, it is possible to use, for example, postcards and the like on both sides by ink-jet recording or thermal transfer recording using postcards.
Furthermore, as one of recent environmental measures, there has been a demand for recording paper that can be used for front and back recording, which requires a small number of sheets to be used. Taking an example of inkjet recording paper, when double-sided inkjet recording is performed on general non-coat type inkjet recording paper, the swelling of the opposite side caused by ink seepage when recording on one side, the back of the ink on the opposite side The problem of reduced visibility of the recording due to omission, more fundamentally, when an ink jet recording paper having an ink receiving layer on both sides is produced, the solvent in the coating layer bleeds to the base paper rather than having an ink receiving layer on only one side. In addition, there has been a problem that ink jet recording performance on each surface is reduced, curling properties are poor, and demands for advanced characteristics cannot be satisfied.

[0007] When such a recording sheet capable of recording on both sides is used for a postcard, a normal government-made postcard, a prepaid postcard with a lottery number (a postcard with a new year's card, a postcard for a hot summer visit with a lottery) are used. )) Cannot be used, and it becomes a private postcard, the opportunity for lottery is not available, the utility value is low, and even if the fee is the same as a government postcard, the work of attaching a stamp is required, and the postal code frame, postcard Alternatively, it is necessary to provide a similar description or the like on the surface. In addition, recording paper surface-treated for inkjet recording or thermal transfer recording may have insufficient water resistance, and the printed portion may bleed due to the moisture when applying a stamp, or the stamp may peel off or fall off with the ink receiving layer. There were problems such as doing.

Since the postcard surface has a certain degree of ink receptivity for ink jet recording or thermal transfer recording,
Integrating the recorded recording paper with the government-made postcard with glue or an adhesive can solve the problem of using ink-jet recording or thermal transfer recording and government-made postcards.However, glue or adhesive is applied to the back of the recording paper after recording. When the adhesive is applied and bonded to an official postcard, there are problems such as the recording portion bleeding due to glue or the moisture or solvent contained in the adhesive, and curling or swelling after bonding. Also, if printing is performed by ink jet recording or thermal transfer recording after pasting the recording paper and postcard with glue or adhesive, the air permeability changes due to the moisture or solvent in the glue or adhesive. There were problems such as overflow and poor drying properties.

[0009] A postcard service for attaching a photo printed at the same size as a postcard to a New Year's postcard has also penetrated considerably into ordinary households. However, sticking a photo on a New Year's postcard at home is usually used at home because the adhesive side of the photographic paper is made of polyethylene resin and has poor adhesion to general glue and low adhesive strength. With such adhesives, a problem may occur that the adhesive is peeled off during mailing.
For this reason, it is necessary to ask a specialized trader, and if the number of sheets is not a certain number, it will be considerably expensive.

[0010] On the other hand, with the rapid spread of computers to general households in recent years, it has become possible to beautifully perform image printing in general households by ink jet recording or thermal transfer recording. For this reason, an increasing number of people design the backside of the New Year's cards themselves and print the images themselves on a government-made New Year's postcard with a New Year's card using an inkjet recording or thermal transfer recording type printer. However, the New Year's postcard with a government-made New Year's card is ordinary high-quality paper, and is not a sheet that is compatible with inkjet recording or thermal transfer recording. Therefore, no matter how beautifully image data is produced, it is possible to print only an image with a moderate appearance.

The inventors of the present invention have invented a heat-adhesive recording sheet in which a heat-adhesive layer is provided on the back surface of an ink jet recording sheet, and have applied for a patent. Since the heat-adhesive recording paper had no tack at room temperature, the heat-adhesive recording paper was easy to align and could be easily heat-adhered with a home iron. Furthermore, the present inventors studied a heating and bonding method, and applied for a patent for a method of manufacturing a postcard large-bonded recording paper in which a plurality of sheets are heated and bonded to a postcard at a time using an electromagnetic wave heating device (microwave oven) at home. . The principle is
The water contained in the heat-adhesive recording paper and postcard is heated by the electromagnetic wave, and the heat causes the heat-adhesive layer to exhibit adhesiveness.

However, the heat-sealing resin or the delayed-tack resin constituting the heat-adhesive layer, of course, depends on its composition, but the film is often not slippery. In addition, recently, due to the effects of lower prices of inkjet printers, printer manufacturers have produced many new products, so the types of printers have increased, and the paper transport mechanism has also been different depending on the printer. For this reason, there is a situation in which printing and transporting cannot be performed by another printer, even though printing and transporting can be performed without any problem.

[0013]

Accordingly, the problem to be solved by the present invention is that after ink-jet recording or thermal transfer recording, it is easily aligned with other papers such as government-made postcards and has sufficient adhesive strength. An object of the present invention is to provide a recording sheet that can be stuck and has good transportability regardless of a printer.

[0014]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, have reached the following invention.

That is, a heat seal having at least one or more ink-receiving layers on one side of a support, and a heat-sealable layer showing adhesiveness when heated and not showing adhesiveness or adhesiveness in a normal state on the other surface. In the heat-sealed recording paper, the heat seal layer contains an organic pigment having a melting point or a softening point of 170 ° C. or less, and the coefficient of dynamic friction of the heat seal layer surface with respect to the ink receiving layer surface is 0.8 or less. The invention is a heat-sealable heat-adhesive recording paper having good printer transportability, characterized in that:

Further, at least one ink receiving layer is provided on one side of the support, and the other side has adhesiveness in a normal state.
In a delayed tack type heat-adhesive recording paper provided with a delayed tack layer that exhibits adhesiveness when heated without exhibiting both adhesive properties, the delayed tack layer contains an organic pigment having a melting point or softening point of 170 ° C. or less, A delayed tack type heat-adhesive recording sheet having good printer transportability, characterized in that a coefficient of dynamic friction of the surface of the delayed tack layer with respect to the surface of the ink receiving layer is 0.8 or less.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the ease of use of the recording paper finally used, especially the ease of use in printing on a printer, and the heat adhesion to postcards and the like, are both included in the heat adhesion layer. The compatibility was achieved by incorporating an organic pigment. What is important here is that the melting point or softening point of the organic pigment is 170 ° C. or lower, which is the bonding temperature, and the coefficient of kinetic friction between the ink receiving layer and the heating adhesive layer containing the organic pigment is 0.8 or lower. That is two points. By including an organic pigment in the heat seal layer, the coefficient of kinetic friction between the ink receiving layer and the heat seal layer is controlled to 0.8 or less, so that when printing with a printer, multiple recording papers are carried at once. It became clear that the frequency of jamming double feeds and paper jams was significantly reduced. Furthermore, at the time of lamination to postcards or the like by setting the melting point or softening point of the organic pigment contained in the heat seal layer to 170 ° C. or less,
The organic pigment is not only physically melted and deformed by the pressing pressure at the time of lamination but does not physically hinder lamination, but also exhibits heat sealing properties depending on the composition of the organic pigment to complement lamination.

The organic pigment used in the heat-adhesive recording paper of the present invention is not particularly limited as long as it has a melting point or a softening point of 170 ° C. or less. Examples thereof include polyamide resins, polyester resins, and polycarbonate resins.
Polyether resin, polyolefin resin, polysulfone resin, polystyrene resin, polyvinyl chloride resin, polyvinylidene chloride resin, ethylene-vinyl acetate copolymer resin, polymethyl methacrylate, ionomer resin, polyphenylene sulfide resin, styrene copolymer resin For example, a common organic powder can be used. Although the particle size is not particularly limited, it is not practical if the particle size is extremely large, so that the particle size is preferably 30 μm or less in order to improve printer transportability.

The organic pigment may be a hollow particle or an aqueous dispersion which is already dispersed in the form of an emulsion.
The constituent material and particle size are not particularly limited as long as the melting point or softening point is 170 ° C. or less. Of course, the melting point or softening point is preferably 0 ° C. or higher. If it is less than 0 ° C., the organic pigment will have tackiness at room temperature,
This tends to impair the ease of handling at room temperature that the present invention originally has.

The heat seal coating agent constituting the heat seal layer of the present invention is described in the book "All About Converting" (published by Processing Technology Research Institute, 1993, p. 351).
), Which is a so-called heat seal coating agent in a narrow sense, which is different from a solventless hot melt coating resin. For example, as the constituent resin, polyolefin resin, polyester, ethylene /
It is used in the form of an organic solvent solution such as a vinyl acetate copolymer resin, polyacrylate, vinyl chloride acetate, an ethylene / acrylic acid copolymer resin, or an aqueous dispersion solution. A heat seal layer obtained by preparing and applying a coating liquid using this resin, and drying at a temperature higher than the minimum film forming temperature, is dried to a state where there is no stickiness even with a finger in a normal state. It is possible to pass paper through ordinary inkjet recording printers without any problem.However, once heated above the melting point or softening point, the heat seal layer is plasticized and becomes tacky, and high quality paper, glass, metal, synthetic resin It can be bonded to a sheet, wood, etc. with light pressure, and the adhesiveness generated here remains even after recooling.

The heat seal layer can be applied as a solvent solution or as an emulsion and dried.

The resin constituting the delayed tack layer of the present invention includes acrylic resin, vinyl chloride resin, vinyl acetate resin, styrene / acryl copolymer resin, styrene / butadiene copolymer resin, polystyrene resin, polyamide resin And the like. The resin contains one or several crystalline (solid) plasticizers such as dicyclohexyl phthalate, diphenyl phthalate, N-cyclohexyl-p-toluenesulfonamide, o / p-toluenesulfonamide and the like. A delayed tack layer obtained by preparing a coating liquid using this resin and coating it, and drying it at or below the melting point or softening point of the plasticizer,
Under normal conditions, it is dried so that there is no stickiness even when touched with a finger, and it is possible to pass the paper through a general inkjet recording printer without any problem. The layer is plasticized and becomes tacky. For this reason, high quality paper, glass,
It can be bonded to metal, synthetic resin sheet, wood, etc. with light pressure, and the adhesiveness generated here remains even if the plasticizer is recrystallized.

In the present invention, in order to incorporate the organic pigment into the resin constituting the heat seal layer or the delayed tack layer, the organic pigment may be directly added to these resins in the form of a powder or an emulsion. It may be added after preparing an aqueous dispersion using various additives such as a dispersant.

In the present invention, the amount of the organic pigment to be added is not particularly limited as long as the dynamic friction coefficient between the heat seal layer or the delayed tack layer and the ink receiving layer is within 0.8 or less. Is an addition amount that can control the dynamic friction coefficient in the range of 0.2 to 0.8. If the dynamic friction coefficient is less than 0.2, the superposed recording paper of the present invention slips too much, and the position control during recording tends to be difficult. The value of the dynamic friction coefficient is adjusted by adjusting the amount of the organic pigment added to the heat sealing agent or the constituent resin of the delayed tack layer. The kinetic friction coefficient itself is a relationship between the ink receiving layer and the heat seal layer or the delayed tack layer, and the amount of the organic pigment added changes when the constituent materials differ. Therefore, in order to achieve a dynamic friction coefficient of 0.8 or less, it is necessary to add 1 to 100 parts of an organic pigment to 100 parts of the solid component of the heat sealing agent or the constituent resin of the delayed tack layer. If the amount is more than 100 parts, the possibility of the dynamic friction coefficient being lower than 0.2 increases, and the adhesiveness may be reduced. If the amount is less than 1 part, the dynamic friction coefficient becomes 0.8.
It will be difficult to:

In the heat seal layer and the delayed tack layer of the present invention, other additives such as a dispersant, a thickener, a fluidity improver, an antifoaming agent, a foam inhibitor, a release agent, a foaming agent, Agents, coloring dyes, coloring pigments, optical brighteners, ultraviolet absorbers,
An antioxidant, a preservative, an anti-binder, a water-proofing agent, a wet paper strength enhancer, a dry paper strength enhancer, an antistatic agent, an antioxidant, and the like can be appropriately blended.

The coating amount of the heat seal layer and the delayed tack layer varies depending on the bonding method, but is preferably in the range of 5 to 40 g / m ^{2 for} the purpose of securing good adhesiveness and recordability. . If the coating amount of the heat seal layer and the delayed tack layer is smaller than this range, the bonding is insufficient and the bonding is weak. Even if it is larger than this range,
Not only does this hinder good paper transportability, but also causes economical cost increases.

As a method of applying the heat seal layer and the delayed tack layer of the present invention, for example, gravure coater, gravure offset coater, bar coater, roll coater, air knife coater, U comma coater,
AKKU coater, smoothing coater, microgravure coater, reverse roll coater, 4 or 5 roll coater, blade coater, dip coater, drop curtain coater, slide coater, die coater, heat seal layer such as melt extrusion, delayed tack layer Any coating method may be used in consideration of the form and suitability of the resin to be formed.

In the recording paper having a heat seal layer and a delayed tack layer according to the present invention, in order to further prevent the resin forming the heat seal layer and the delayed tack layer from penetrating into the base paper, the recording paper is in contact with the base paper to prevent penetration. A layer may be provided. The role of the permeation preventing layer is to prevent the resin forming the heat seal layer and the delayed tack layer from penetrating into the base paper and to provide smoothness in providing the heat seal layer and the delayed tack layer. The permeation preventing layer that can be used in the present invention can be provided by an aqueous solution or emulsion of a natural polymer or a synthetic resin polymer, and examples thereof include the following substances.

Examples of natural polymers and semi-synthetic polymers include modified starch compounds such as starch, oxidized starch, etherified starch, dialdehyde-modified starch and esterified starch, alginic acid compounds such as sodium alginate and propylene glycol alginate, casein,
Examples include gelatin, pullulan, dextran, chitin, chitosan, gum latex, gum arabic, funori, natural gum, dextrin, modified cellulose compounds such as methylcellulose, ethylcellulose, hydroxycellulose, carboxymethylcellulose, and the like.

As the synthetic resin polymer, completely or partially saponified polyvinyl alcohol, acetoacetylated polyvinyl alcohol, esterified product of polyvinyl alcohol and polycarboxylic acid, carboxy-modified polyvinyl alcohol, sulfonic acid-modified polyvinyl alcohol , Olefin-modified polyvinyl alcohol, nitrile-modified polyvinyl alcohol, amide-modified polyvinyl alcohol, modified polyvinyl alcohol compounds such as pyrrolidone-modified polyvinyl alcohol, polyethylene glycol, polyacrylamide, polyacrylic acid,
Examples include polyacrylic acid compounds such as ammonium polyacrylate and sodium polyacrylate, polyvinylpyrrolidone, polyethyleneimine, polyvinyl ether, polymaleic acid copolymer, polyacrylamide, and water-soluble alkyd resin.

Further, an emulsion obtained by dispersing a synthetic polymer such as styrene / butadiene copolymer, butadiene / methacrylate copolymer, acrylonitrile / butadiene / acrylate latex in water can be used.
The above polymers can be used alone or as a mixture, if necessary, in combination with an antifoaming agent, a dispersant and the like. The penetration preventing layer can be formed by melt lamination of polyolefin resin or dry lamination as long as it prevents the resin or solvent from penetrating into the support.

The base paper used for the support of the present invention is composed mainly of wood pulp and pigment. As wood pulp, chemical pulp such as LBKP and NBKP, GP,
Including mechanical pulp such as PGW, RMP, TMP, CTMP, CMP and CGP, pulp such as waste paper pulp such as DIP, etc., if necessary, conventionally known pigments and binders and sizing agents, fixing agents, retention improvers, cationization Agent,
Mixing various additives such as paper strength agent using one or more,
The support can be manufactured by various apparatuses such as a fourdrinier paper machine, a round paper machine, and a twin wire paper machine, and can be made in an acidic, neutral, or alkaline state. When an ink receiving layer is provided, the base paper may be provided with the ink receiving layer as it is,
The ink receiving layer may have a multilayer structure in which an ink receiving layer is provided after a size press using starch, polyvinyl alcohol, or the like, or an anchor coat layer is provided.

Further, the base paper may be subjected to on-machine processing using a calender device comprising a metal roll and a synthetic resin roll. At that time, off-machine processing may be performed, and after processing, flatness may be controlled by further performing calendar processing using a machine calendar, a super calendar, or the like.

One or more known white pigments can be used for the base paper. For example, light calcium carbonate, heavy calcium 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 non-crystalline White inorganic pigments such as crystalline silica, colloidal silica, colloidal alumina, pseudoboehmite, aluminum hydroxide, alumina, lithopoly, zeolite, hydrohaloysite, magnesium carbonate, magnesium hydroxide, styrene plastic pigment, acrylic plastic pigment, polyethylene, Organic pigments such as microcapsules, urea resins, and melamine resins are exemplified.

When the ink receiving layer is provided with ink jet recording suitability, the coating amount of the ink receiving layer is not particularly limited, but if it is too small, the ink absorbing property is as good as the non-coat type ink jet recording paper. In addition, the image density, color, and sharpness are low, and the ink is diffused in the surface direction of the support, thereby causing deterioration of the dot shape called feathering, which is jagged like bird feathers. In addition, if the coating amount is too large, the drying load in the drying step after coating or impregnation increases, and not only does the productivity decrease due to the decrease in the coating or impregnation speed, but also when drying under a high load, the ink receiving layer The binder in the coating composition constituting (1) moves to the surface of the ink receiving layer together with the solvent that evaporates, and reduces the amount of voids on the surface. The problem which occurs in the ink receiving layer having a large coating amount is affected by the concentration of the coating composition and the ability of the drying step, but is preferably 1 to 30 g / m ² .

One or more known white pigments can be used in the ink receiving layer suitable for ink jet recording. For example, light calcium carbonate, heavy calcium 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 non-crystalline Amorphous silica, colloidal silica, colloidal alumina, pseudoboehmite, aluminum hydroxide, alumina, lithopoly, zeolite,
White inorganic pigments such as hydrohaloysite, magnesium carbonate, and magnesium hydroxide; styrene plastic pigments, acrylic plastic pigments; polyethylene, microcapsules, and organic pigments such as urea resins and melamine resins. Among the above, as the white pigment contained as the main component in the ink receiving layer, a porous inorganic pigment is preferable, and porous synthetic amorphous silica, porous magnesium carbonate, porous alumina, and the like, and particularly, Large volume porous synthetic amorphous silica is preferred.

As the dye-dyeable binder resin constituting the ink receiving layer having a sublimation type thermal transfer recording suitability, a dye-dyeable binder resin having a strong interaction with the dye and capable of stably diffusing the dye into the resin. Any of them can be suitably used.

For example, those having an ester bond include polyester resins, polyacrylate resins,
Polycarbonate resin, polyvinyl acetate resin, styrene acrylate resin, etc .; those having urethane bonds are polyurethane resins; those having amide bonds are polyamide resins (nylon); those having urea bonds are urea resins A polycaprolactone resin, a polystyrene resin, a polyvinyl chloride, a polyacrylonitrile resin, or the like, or a resin having one or more of the structural units of the resin as a main component having a highly polar bond. Copolymer, for example,
It can be used as a vinyl chloride-vinyl acetate copolymer, a styrene-butadiene copolymer or the like, and the above resins can be used alone or in combination of two or more.

The ink-receiving layer having suitability for melt-type thermal transfer recording may be a layer coated with a resin having an ink-receiving property. Specific examples include water-soluble resins such as starch, casein, gelatin, polyvinyl alcohol, carboxymethyl cellulose, and hydroxyethyl cellulose, and resin emulsions such as styrene butadiene, acrylic, and vinyl acetate.

In order to obtain higher print quality, an inorganic pigment such as silica, alumina, titanium oxide, kaolin, clay, talc, zinc oxide, barium sulfate, starch particles, cellulose, etc. Powder, melamine resin particles, guanamine resin particles, urethane resin particles, epoxy resin particles,
Organic pigments such as silicone resin fine particles and vinyl resin fine particles, and hollow pigments such as vinyl resin hollow fine particles and melamine resin hollow fine particles may be added.

If necessary, a dispersant, a crosslinking agent, a dye, a fluorescent agent, an ultraviolet absorber, an antioxidant, a preservative, a surfactant, a defoaming agent, a thickener, and a conductive agent may be used in the ink receiving layer of the present invention. An agent may be added.

In the present invention, a release agent may be added to the ink receiving layer for the purpose of preventing blocking. Specific examples of such release agents include higher fatty acids or esters thereof, amides or metal salts thereof, waxes such as shellac wax, montan wax, carnauba wax, polyethylene wax, and Teflon powder; fluorine-based and phosphate-based Surfactants; silicone oils and the like. Also, as silicone oil,
Modified silicone oils such as amino-modified silicone, epoxy-modified silicone, alkyd-modified silicone, and polyester-modified silicone are also used. In addition, as the silicone compound, a curable silicone compound can be used if necessary. Examples of the curable silicone compound include a reaction curable type, an ionizing radiation curable type, and a catalyst curable type.

The method of applying the ink receiving layer to the base paper of the present invention is performed by using various apparatuses such as a blade coater, a roll coater, an air knife coater, a bar coater, a rod blade coater, a short dwell coater, and a size press. Alternatively, it can be used off-machine. After coating or impregnation, finishing may be performed using a calendar such as a machine calendar, a TG calendar, a super calendar, or a soft calendar.

The operation of the present invention will be described below. The recording paper of the present invention is a recording paper having an adhesive layer which expresses adhesiveness by heating, which does not have adhesiveness or tackiness in a normal state, on the opposite surface of the support having the ink receiving layer. Contains an organic pigment, and in a normal state, forms irregularities on the surface of the heat seal layer or the delayed tack layer to reduce the friction coefficient with the ink receiving layer surface to 0.8 or less,
Makes the printer easier to transport, does not cause double feeding or paper jam of recording paper during printing,
The organic pigment is not melted or softened and deformed, and does not hinder heat bonding. In other words, the printer can be widely used for printing without choosing a printer.

[0045]

EXAMPLES The present invention will be described below with reference to examples of the present invention, but the present invention is not limited to these examples. Further, “parts” and “%” shown in the examples are parts by weight and% by weight unless otherwise specified.

<Preliminary Operation> The base paper was LBKP (freeness of 4).
20 mlcsf) 72 parts and NBKP (freeness 440 ml)
csf) For 100 parts of wood pulp consisting of 28 parts,
25 parts of pigment having a ratio of light calcium carbonate / heavy calcium carbonate / talc of 32/33/35, 0.12 part of commercially available alkyl ketene dimer, 0.03 part of commercially available cationic acrylamide, 1.2 parts of commercially available cationic starch, After preparing 0.5 part of the sulfuric acid band, a basis weight of 100 g /
and papermaking in m ^2.

An ink receiving layer suitable for ink jet recording was provided on the surface of the base paper thus produced. As an ink receiving layer composition, 120 parts of synthetic amorphous silica (Fanseal X37B, manufactured by Tokuyama Soda), polyvinyl alcohol (PVA11)
7, Kuraray) and 20 parts of a cationic dye fixing agent (Sumireze resin 1001, manufactured by Sumitomo Chemical Co., Ltd.)
This was adjusted to a solid concentration of 15%. Using the prepared ink-receiving layer coating solution, apply it to the base paper surface with an air knife coater so as to have a dry coating amount of 5.5 g / m ² ,
A recording paper was obtained by forming an ink receiving layer.

Example 1 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo Co., Ltd., solid content 51%) and an organic pigment (Chempearl W-) were applied on the opposite side of the recording paper obtained by the preliminary operation. 950, manufactured by Mitsui Petrochemical, solid content 40%, softening point 148 ° C).
Coating was performed so as to be 5 g / m ^2, and drying was performed under warm air at 80 ° C. for 20 seconds to form a heat seal layer. Thus, a heat seal type heat adhesion recording paper of the present invention was obtained. The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.7.
It was 5.

Example 2 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo, solid content 51%) and an organic pigment (Flocene UF- 1.5, powder made by Sumitomo Seika, melting point 107 ° C) 9
The heat-sealing recording paper of the present invention is provided with a heat-sealing recording paper of the present invention, which is coated with a heat seal layer composed of 0 parts so as to have a solid content of 15 g / m ² and dried under hot air at 80 ° C. for 20 seconds. And The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured and found to be 0.55.

Example 3 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo, solid content 51%) and an organic pigment (Chempearl W- 400, manufactured by Mitsui Petrochemical, solid content 40%, softening point 110 ° C).
g / m ² and dried under hot air at 80 ° C. for 20 seconds to form a heat-sealing layer to obtain a heat-sealing heat-adhesive recording sheet of the present invention. The dynamic friction coefficient between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.55.
Met.

Example 4 On the opposite side of the recording paper obtained in the preliminary operation, 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content: 52%) and an organic pigment (Chempearl W-950,
Mitsui Petrochemical, solid content 40%, softening point 148 ° C) 50
The solid content is 15 g / m ²
And dried under hot air at 45 ° C. for 20 seconds to provide a delayed tack layer, thereby obtaining a delayed tack type heat-adhesive recording sheet of the present invention. The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured to be 0.70.

Example 5 On the opposite side of the recording paper obtained in the preliminary operation, 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content 52%) and an organic pigment (Chempearl WF-64)
0, Mitsui Petrochemical, solid content 40%, softening point 113 ° C)
90g delayed tack layer with 15g solids
/ m ² and dried under hot air at 45 ° C. for 20 seconds to provide a delayed tack layer to obtain a delayed tack type heat-adhesive recording paper of the present invention. The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured to be 0.70.

Example 6 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content: 52%) and an organic pigment (Flowsen UF-1.
5, a powder made by Sumitomo Seika Co., Ltd., melting point 107 ° C.) 2 parts of a delayed tack layer was applied to a solid content of 15 g / m ² and dried under hot air at 45 ° C. for 20 seconds. A tack layer was provided to provide a delayed tack type heat-adhesive recording sheet of the present invention. The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured to be 0.70.

Comparative Example 1 A modified ethylene / vinyl acetate copolymer resin (Aquatex E) was used as a heat seal layer on the opposite side of the recording paper obtained in the preliminary operation.
C1200, central Rika Kogyo Co., Ltd., total solids solids 51%) is dried for 20 seconds with warm downwind coating to 80 ° C. so that the 15 g / m ^2, provided with a heat seal layer, heat bonding recording paper And The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.90.

Comparative Example 2 On the opposite side of the recording paper obtained in the preliminary operation, a heat-sensitive adhesive (Heat Magic DW200) was used as a delayed tack layer.
0, manufactured by Toyo Ink, solid content 52%)
/ m ² and dried under hot air at 45 ° C. for 20 seconds to provide a delayed tack layer to obtain a heated adhesive recording paper. The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured to be 0.87.

Comparative Example 3 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo, solid content 51%) and an organic pigment (Chempearl V- 200, manufactured by Mitsui Petrochemical Co., Ltd., solid content 40%, softening point 42 ° C.)
Coating was performed at 5 g / m ^2, and the coating was dried under hot air at 80 ° C. for 20 seconds to form a heat-sealing layer to obtain a heat-sealing heat-adhesive recording paper. The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.90.

Comparative Example 4 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo, solid content 51%) and an organic pigment (Grosdale 200) -S, manufactured by Mitsui Toatsu Chemical Co., Ltd., solid content 43%, softening point 180 ° C.) A heat seal layer composed of 40 parts was applied so that the solid content was 15 g / m ^2, and heated under 80 ° C. warm air at 20 ° C.
After drying for 2 seconds, a heat seal layer was provided to obtain a heat seal type heat adhesion recording paper. The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.75.

COMPARATIVE EXAMPLE 5 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content: 52%) and an organic pigment (Chempearl V-200,
Mitsui Petrochemical, solid content 40%, softening point 42 ° C) 0.5
The solid content is 15 g / m ²
And dried under hot air at 45 ° C. for 20 seconds to provide a delayed tack layer, thereby obtaining a delayed tack type heat-adhesive recording paper. The coefficient of dynamic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured to be 0.85.
Met.

Comparative Example 6 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content 52%) and an organic pigment (Grosdale 200-) were applied on the opposite side of the recording paper obtained by the preliminary operation.
S, manufactured by Mitsui Toatsu Chemicals, solid content 43%, softening point 180 ° C)
The solid content of the delayed tack layer consisting of 40 parts is 15 g.
/ m ² and dried under warm air at 45 ° C. for 20 seconds to provide a delayed tack layer to obtain a delayed tack type heat-adhesive recording paper. The coefficient of kinetic friction between the ink receiving layer surface and the delayed tack layer surface was measured to be 0.7
It was 5.

Comparative Example 7 On the opposite side of the recording paper obtained by the preliminary operation, 100 parts of a modified ethylene / vinyl acetate copolymer resin (Aquatex EC1200, manufactured by Chuo Rika Kogyo Co., Ltd., solid content: 51%) and 40 parts of kaolin as an inorganic pigment were applied. A heat seal layer consisting of is applied so that the solid content is 15 g / m ² and dried under hot air at 80 ° C. for 20 seconds,
A heat seal layer was provided to obtain a heat seal type heat adhesion recording paper. The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the heat seal layer was measured to be 0.75.

Comparative Example 8 A delay consisting of 100 parts of a heat-sensitive adhesive (Heat Magic DW2000, manufactured by Toyo Ink, solid content: 52%) and 40 parts of kaolin, an inorganic pigment, was applied to the opposite side of the recording paper obtained in the preliminary operation. The tack layer was coated to a solid content of 15 g / m ² and dried under hot air at 45 ° C. for 20 seconds to provide a delayed tack layer to obtain a delayed tack type heat-adhesive recording paper. The coefficient of kinetic friction between the surface of the ink receiving layer and the surface of the delayed tack layer was measured and found to be 0.75.

The recording papers obtained in Examples and Comparative Examples were tested by the following methods. Table 1 shows the evaluation results.

<Test method> 1) Printer transportability The recording paper obtained in each of the examples and comparative examples was cut into the size of a postcard, and each of the printers shown below was set to 20 sheets, and continuous printing was repeated 30 times. went. The number of times printing troubles such as double feed and paper jam occurred were counted. If the number of occurrences is 0, it can be determined that there is no problem in transportability. If it is 1 to 3, it can be determined that there is no significant problem in normal use, and if it is 4 or more, it can be determined that there is a problem.

The printers used in the printer transportability test are as follows. BJC-400J (manufactured by Canon), BJC-600J (manufactured by Canon), BJC-42
0J (Canon), MJ-910C (Epson),
MJ-810C (manufactured by Epson), PM-700C (manufactured by Epson)

2) Adhesion of woodfree paper The ink-jet recording was performed on the papers obtained in Examples and Comparative Examples, and a heat seal layer was adhered to woodfree paper with a basis weight of 190 g / m ² , and the paper was ironed with a household iron. Heating (18
(0 ° C.), bonded together by lamination and aged for one day, and the adhesive strength was measured with a Tensilon universal tensile tester. The tensile strength (adhesive strength) is 200gf / 25mm
If it is above, it can be said that lamination which does not hinder practically is completed.

[0066]

[Table 1]

Evaluation: As is clear from the examples, the heat-sealing type heat-adhesive recording paper or the delayed tack-type heat-adhesive recording paper of the present invention has good transportability with many types of printers, regardless of the type of printer. It turns out that it shows. Further, it can be seen that the adhesive strength is not inferior to those of Comparative Examples 1 and 2, which do not contain any pigment even when heated and bonded to high quality paper.

As in the case of the present invention, even in the case where the organic pigment is contained in the heat seal layer or the delayed tack layer, in Comparative Examples 4 and 6 in which the melting point or softening point of the organic pigment exceeds 170 ° C., the adhesive strength to high quality paper is low. 200gf / 2
It does not reach 5 mm and is not practical. Further, in Comparative Examples 3 and 5, in which the kinetic friction coefficient exceeds 0.8 even if the organic pigment having a melting point or a softening point of 170 ° C. or less is contained, a large problem occurs in printer transportability. I understand. On the other hand, in the case of containing an inorganic pigment instead of an organic pigment as in Comparative Examples 7 and 8,
It turns out that it does not show any heat adhesion.

[0069]

According to the present invention, although the recording paper has an adhesive layer and an ink receiving layer, the adhesive layer does not show any tackiness or adhesiveness in a normal state, and furthermore, the paper passing property through the printer is good. It is possible to provide recording paper that can be used for ink jet recording or thermal transfer recording without limiting the type of printer that can be used, and that can be pasted to other papers such as government-made postcards with sufficient adhesive strength after recording. Great value.

Claims (2)

[Claims] 1. A heat seal comprising at least one ink-receiving layer on one side of a support and a heat-sealing layer on the other side showing adhesiveness when heated without exhibiting tackiness and adhesiveness in a normal state. In the heat-sealed recording paper, the heat seal layer contains an organic pigment having a melting point or a softening point of 170 ° C. or less, and the coefficient of dynamic friction of the heat seal layer surface with respect to the ink receiving layer surface is 0.8 or less. A heat-sealing type heat-adhesive recording sheet having good printer transportability, characterized in that: 2. A delayed tack having at least one ink-receiving layer on one side of a support, and a delayed tack layer exhibiting adhesiveness when heated and exhibiting neither tackiness nor adhesiveness in a normal state on the other surface. In the heat-bonded recording paper, the melting point or the softening point is 1 in the delayed tack layer.
A delayed tack-type heat-adhesive having excellent printer transportability, characterized by containing an organic pigment having a temperature of 70 ° C. or less and having a dynamic friction coefficient of 0.8 or less on the surface of the delayed tack layer with respect to the surface of the ink receiving layer. Recording sheet.