TW202020265A - Transfer paper - Google Patents

Abstract

An objective of the present invention is to provide a transfer paper which can be peeled from a fabric on which a pattern is formed without any problem before a steaming process, and occurrence of defects such as dropout, color unevenness, and reduced color development on the pattern formed on the cloth can be suppressed.

As a solution, the transfer paper of the present invention includes a base material having one or two or more non-aqueous resin layers on one side of a base paper, and one or two or more coating layers on the non-aqueous resin layers; the outermost coating layer located outermost with respect to the base material contains at least a water-soluble polyester resin, a carboxylic acid-modified polyvinyl alcohol resin, an acrylic resin and starch, and a white pigment; the acrylic resin has a glass transition point (Tg) of 0℃ or more and 45℃ or less and a minimum film formation temperature (MFT) of 0℃ or more and 50℃ or less.

Description

Transfer paper

The present invention relates to a transfer paper for transferring a pattern to a fabric. In one embodiment, it relates to a method for transferring a pattern printed using an acid ink containing an acid dye to a Transfer paper used for nylon cloth.

The printing and dyeing paper that can obtain the performance of fine printing and dyeing patterns with excellent reproducibility and excellent levelness, and soft fiber touch, is known as a printing and dyeing paper used in a transfer printing method, which is used Printing ink containing dye prints the pattern on the printing and dyeing paper to obtain the printing and dyeing paper, and the dye is transferred by adhering the printing and dyeing paper to the fiber material or leather material and heating and pressing, and the printing and dyeing paper is attached to the fiber Dye fixing treatment is carried out in the state of materials or leather materials. The printing paper is prepared by mixing the ratio of the natural paste with respect to the water-soluble synthetic binder in the range of 5% to 0% in terms of solid content conversion and The hydrophilic mixture prepared with various additives is coated, sprayed, or immersed in the base paper, and then dried to have an ink-receiving layer and an adhesive layer that are absorbed by the paper or laminated on the paper (for example, refer to Patent Document 1).

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2016-102283

It is generally believed that the heat resistance of ordinary nylon fabrics is 80°C to 140°C, and thermal deformation may occur from around 70°C. Therefore, the transfer paper is adhered to the fiber material as disclosed in Patent Document 1 and the dye is transferred by heating and pressing, and the steam treatment of the dye is performed in a state where the transfer paper is attached to the fiber material As for the transfer printing and dyeing method, when the fiber material is nylon, there will be some bad conditions.

That is, when the transfer paper is attached to the nylon cloth for steam treatment, according to the size stability of the nylon cloth to heat and the size stability of the transfer paper to moisture, the transfer paper is attached to the resistant In the state of the nylon cloth, there is a problem that the transfer paper has partial peeling, partial unevenness and partial wrinkles. As a result, the resulting nylon fabric becomes partially degraded. In view of the current situation, this problem is to be solved by the technique of the operator of the steam treatment, or by a design such as a design that focuses the pattern on a part of the range. In addition, the ink receiving layer and the adhesive layer as disclosed in Patent Document 1 belong to the adhesive layer that is firmly adhered to the fiber by heating and pressing, so the transfer paper is adhered to the fiber material to heat and After pressurization and before steam treatment, there is a problem that the transfer paper cannot be peeled from the fiber material at an economically satisfactory speed. Even when the transfer paper can be peeled off from the fiber material well, the pattern formed by the nylon cloth still has some problems such as shedding, uneven color, and low color development.

In view of the above circumstances, the object of the present invention is to provide a transfer problem in order to avoid the operation problems of partial peeling, partial unevenness and partial wrinkles of the transfer paper. Paper, which can be formed on the nylon cloth by adhering the transfer paper and the cloth, especially in terms of implementation, and heating and pressurizing the nylon cloth, and after the pattern is formed and before the steam treatment The transfer paper is peeled off from the nylon cloth cleanly, and can prevent the pattern formed on the nylon cloth from peeling off, uneven colors, and low color development.

In order to solve the above-mentioned problems, the present inventors concentrated on the results of research, and the objects of the present invention can be achieved by the following.

[1] A transfer paper, which is used to transfer the printing pattern before printing the printing pattern, the transfer printing method is to make the transfer paper obtained by printing the pattern with dye ink closely adhere to the fabric, and by Heat and pressure to transfer the dye from the transfer paper to the fabric, and after the transfer to peel the transfer paper from the fabric, the fabric is subjected to steam treatment; the transfer paper is equipped with: 1 or 2 layers on one side of the base paper The base material of the above non-aqueous resin layer, and one or more coating layers on the aforementioned non-aqueous resin layer; wherein, the outermost coating layer positioned at the outermost position with the base material as a reference contains at least water-soluble Polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and starch, and white pigment, the acrylic resin has a glass transition point (Tg) of 0°C or more and 45°C or less and a minimum film-forming temperature (MFT) It is above 0°C and below 50°C.

By making the transfer paper obtained by printing the pattern on the transfer paper of the present invention adhere to the fabric and applying heat and pressure, the pattern can be formed on the fabric, and the transfer paper can be removed from the transfer paper after the pattern is formed and before the steam treatment. The fabric is peeled off cleanly, and it is possible to suppress the pattern formed on the fabric from falling off, uneven color, and low color development.

[2] The transfer paper as described in [1] above, in at least one embodiment, at least one of the white pigments contains amorphous silicon oxide and has a laser diffraction/scattering particle size The volume-based average particle diameter of the amorphous silicon oxide obtained by distribution measurement is 27 μm or more and 40 μm or less.

With this transfer paper, the peelability of the transfer paper from the fabric can be improved.

[3] The transfer paper described in [2] above, in at least one embodiment, the horizontal axis of the amorphous silicon oxide obtained by laser diffraction/scattering particle size distribution measurement is the particle size And the volume-based particle size distribution curve with the frequency at the vertical axis as the number of particles, the particle size D20 with a cumulative frequency of 20% by volume with a particle size of zero as the starting point and the particle size with a cumulative frequency of 80% by volume with a particle size of zero as the starting point The ratio of the diameter D80 (D80/D20) is 2.9 or more and 4.5 or less.

With this transfer paper, it is possible to suppress the occurrence of defects such as peeling off of the pattern formed on the fabric, uneven color, and low color development, and/or to improve the peelability of the transfer paper from the fabric.

As for at least one embodiment, a transfer paper is a transfer printing method in which the dye printing ink is an acid printing ink containing an acid dye and the cloth is nylon cloth.

According to the present invention, it is possible to provide a transfer paper which can form a pattern on a fabric by adhering the transfer paper to a fabric and applying heat and pressure, and can transfer the transfer paper from the fabric after the pattern is formed and before the steam treatment The peeling is clean, and it is possible to suppress the pattern formed on the fabric from falling off, uneven color, and low color development.

The present invention will be described in detail below.

In the present invention, the “transfer paper” refers to paper in a state of white paper before the pattern to be transferred is printed. The so-called "transfer paper" refers to the image printed on the transfer paper that is to be transferred Paper for the status of the case.

In addition, in the present invention, the term "having a coating layer" refers to paper having a clear coating layer that can be distinguished from the substrate when the cross section of the transfer paper is observed with an electron microscope. For example, when a resin component or a polymer component is applied and the aforementioned component is applied in a small amount and is absorbed by the substrate, when the cross section of the transfer paper is observed with an electron microscope, there is no clear coating layer that can be distinguished from the substrate. Conforms to "has a coating layer".

The transfer paper includes a base material having one or more non-aqueous resin layers on one side of the base paper, and one or more coating layers on the non-aqueous resin layer. Among the coating layers, the coating layer positioned at the outermost position with the base material as the reference is referred to as the outermost coating layer. When there is only one coating layer, the coating layer becomes the outermost coating layer. The outermost coating layer contains at least water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and starch, and white pigment. When the coating layer is 2 or more layers, the coating layer existing between the base material and the outermost coating layer is a coating layer previously well-known in the field of coated paper, and is directed to the presence and type of white pigment and the presence and type of resin There is no particular limitation. In addition, the coating layer existing between the base material and the outermost coating layer can contain various additives previously known in the field of coated paper.

From the viewpoint of the manufacturing cost of the transfer paper, the coating layer is preferably one layer. In addition, the coating layer is provided on the surface of the base material on the non-aqueous resin layer side. The transfer paper may have a previously well-known back coat layer on the back side of the base material, that is, the side opposite to the surface of the base paper having the non-aqueous resin layer.

The coating amount of the coating layer is not particularly limited. From the viewpoint of production cost of the transfer paper and ease of handling, the coating amount is preferably 5 g/m ² or more and 70 g/m ² or less in terms of the dry solid content per one side. The upper limit of the coating amount is more preferably 30 g/m ² or less in dry solid content per one side. Moreover, from the viewpoint of reducing the manufacturing cost and preventing the peeling of the coating layer when the transfer paper and the fabric are in close contact, the coating amount is preferably 10 g/m ² or more and 30 g/m in terms of dry solid content per one side. ² or less. When there are a plurality of coating layers on each side, the coating amount is the total value of these.

The base paper is paper-made paper made by papermaking. The paper is selected from chemical pulps such as LBKP (Leaf Bleached Kraft Pulp; broadleaf bleached kraft pulp), NBKP (Needle Bleached Kraft Pulp; conifer bleached kraft pulp), GP (Groundwood Pulp), PGW (Pressure GroundWood pulp), RMP (Refiner Mechanical Pulp), TMP (ThermoMechanical Pulp), CTMP (ChemiThermoMechanical Pulp), Chemistry Thermomechanical pulp), CMP (ChemiMechanical Pulp; chemical mechanical pulp), CGP (ChemiGroundwood Pulp; chemical grinding wood pulp) and other mechanical pulp, and DIP (DeInked Pulp; deinked pulp) and other waste paper pulp at least one pulp, depending on Various fillers such as heavy calcium carbonate, light calcium carbonate, talc, clay, kaolin and calcined kaolin, sizing agent, fixing agent, retention agent, cationizing agent, paper strength agent, etc. Additives. In addition, the base paper includes Daolin paper made by subjecting the papermaking paper to calendering, surface sizing treatment using starch, polyvinyl alcohol, or the like, or surface treatment. In addition, the base paper includes Daolin paper which is subjected to surface sizing treatment and surface treatment on the papermaking paper, and is then processed by a calender.

The papermaking system adjusts the paper stock to be acidic, neutral or alkaline and uses a paper machine previously known. Examples of paper machines include long wire paper machines, twin-wire paper machines, combined paper machines, rotary wire paper machines, and Yankee paper machines (Yankee machine) etc.

The basis weight of the base paper is not particularly limited. From the viewpoint of ease of handling paper, the basis weight of the base paper is preferably 10 g/m ² or more and 100 g/m ² or less, more preferably 30 g/m ² or more and 100 g/m ² or less. .

In the paper, it can be appropriately selected from binders, pigment dispersants, tackifiers, fluidity improvers, defoamers, foam inhibitors, and release agents without compromising the desired effect of the present invention. Agent, foaming agent, penetrating agent, coloring dye, coloring pigment, fluorescent whitening agent, ultraviolet absorber, antioxidant, preservative, antifungal agent, water resistance agent, wetting paper strength enhancer, dry paper strength enhancer One or two or more of them are used as other additives.

The base material can be obtained by providing a non-aqueous resin layer on one side of the aforementioned base paper. The non-aqueous resin layer has a function of supporting the operation of peeling the transfer paper from the fabric, and a function of preventing the dye ink from penetrating the base paper. Assuming that when the transfer paper is peeled from the fabric when the coating layer of the transfer paper and the fabric are difficult to peel off, by peeling off all or part of the coating layer of the transfer paper from the non-aqueous resin layer, the fabric including all or part of the coating layer adheres to In the state of the cloth, the transfer paper can be peeled off well. If it is a transfer printing method in which the transfer paper is steamed after the transfer paper is peeled off from the cloth, the operation problems of partial peeling, partial unevenness, and partial wrinkles of the transfer paper can be avoided. In addition, when printing a pattern on transfer paper using dye ink, the non-aqueous resin layer prevents the dye from reaching the base paper, which can further suppress the occurrence of defects such as shedding, uneven color, and low color development of the pattern formed on the fabric.

The non-aqueous resin layer is a layer made of a non-aqueous resin that is insoluble in water. The non-aqueous resin to form the non-aqueous resin layer is a resin other than water, which is a medium resin. The solvent other than water becomes a resin of the medium, and a solvent type resin can be mentioned. Also, to form One type of non-aqueous resin in the non-aqueous resin layer is a solvent-free type resin. In addition, one of the non-aqueous resins to be formed into the non-aqueous resin layer is an emulsion type resin. The non-aqueous resin system is, for example, a polyolefin resin, a vinyl resin, or a resin to be hardened by electron beams. Specific examples of non-aqueous resins include polyethylenes such as high-density polyethylene, low-density polyethylene, medium-density polyethylene, and linear low-density polyethylene; isotactic polypropylene and counter-aligned polymer Polypropylene such as propylene, heteropolypropylene, mixtures of these, random copolymers and block copolymers with ethylene; and polymethylpentene, polyethylene glycol terephthalate, polyvinyl chloride, Polyvinylidene chloride (polyvinylidene chloride), ethylene vinyl alcohol copolymer, ethylene vinyl acetate copolymer, etc. As the non-aqueous resin, one kind or two or more kinds selected from the group consisting of these resins can be used.

The method of providing the non-aqueous resin layer on the substrate is not particularly limited. If it is a solvent-free type resin, for example, a method of using a conventional melt extrusion die, T-die, multi-layer simultaneous extrusion die, etc., a well-known laminator device; if it is a solvent type resin , For example, a method of coating and drying a non-aqueous resin layer coating liquid formed by dissolving a non-aqueous resin with a solvent as a medium; and in the case of an emulsion type resin, for example, water A method of coating and drying a non-aqueous resin layer coating liquid containing an emulsion of a non-aqueous resin as a medium. The method of applying and drying the non-aqueous resin layer coating liquid is not particularly limited. For example, a method of coating and drying using a coating device and a drying device that have been well-known in the papermaking field can be cited. Examples of coating devices include sizing presses, gate roll coaters, film transfer coaters, blade coaters, rod coaters, pneumatic blade coaters, and comma coaters (comma coater), gravure coater, bar coater, E bar coater, curtain flow coater, etc. Examples of drying devices include linear tunnel dryers, arch dryers, air circulation dryers, and sinusoidal air floaters. Hot air dryers such as dynamic dryers, infrared heating dryers, dryers using microwaves, etc.

On one side of the base paper, the non-aqueous resin layer is one layer or more than two layers. From the viewpoint of manufacturing cost, the non-aqueous resin layer system is preferably one layer. The thickness of the non-aqueous resin layer is preferably 10 μm or more, and preferably 15 μm or more. The reason is that the base paper has sufficient coverage and the above-mentioned function of the non-aqueous resin layer is further improved. In addition, the upper limit of the thickness of the non-aqueous resin layer is preferably 30 μm or less. The reason is that the above-mentioned functions are saturated at 30 μm, and the material cost increases when it is larger than 30 μm.

The thickness of the non-aqueous resin layer means the thickness of the non-aqueous resin layer when it is one layer, and the total thickness of the layers when the non-aqueous resin layer is two or more layers.

The coating layer can be provided by applying and drying the coating liquid of the coating layer to the substrate or the lower coating layer.

The method of providing the coating layer is not particularly limited. For example, a method of coating and drying using a coating device and a drying device that have been well-known in the papermaking field can be cited. Examples of the coating device include a size press, gate roller coater, film transfer coater, blade coater, rod coater, pneumatic blade coater, comma coater, gravure coater, and rod Coater, E-bar coater, curtain flow coater, etc. Examples of the drying device include hot air dryers such as linear tunnel dryers, arch dryers, air circulation dryers, and sinusoidal air floating dryers, infrared heating dryers, dryers using microwaves, and the like.

In addition, the coating layer can be calendered after coating and drying.

The outermost coating layer contains at least water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and starch, and white pigment. The outermost coating layer can be made by combining water-soluble polyester resin, carboxylic acid modified polyvinyl alcohol resin, acrylic resin and starch, and white pigment It is formulated in the coating layer coating liquid of the outermost coating layer, and contains water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and starch, and white pigment.

The water-soluble polyester resin refers to a resin obtained by polycondensation reaction of a polycarboxylic acid and a polyhydric alcohol, and refers to a polycarboxylic acid and a polyhydric alcohol as constituent components accounting for 60% by mass or more of the resin.

Examples of polycarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, naphthalene dicarboxylic acid, adipic acid, succinic acid, sebacic acid, and dodecanedioic acid. It is better to choose one or more than one from the group consisting of these acids. Examples of polyols include ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, diethylene glycol, dipropylene glycol, and cyclohexanedimethanol. , Bisphenol, etc., preferably one or more than two kinds selected from the group consisting of these polyols and used. In addition, the water-soluble polyester resin can be copolymerized with a component having a hydrophilic group such as a carboxyl group or a sulfonic acid group in order to improve water solubility. Water-soluble polyester resins are commercially available from Mutual Chemical Industries Co., Ltd., Takamatsu Oil Co., Ltd., and UNITIKA Corporation, and such commercially available products can be used in the present invention. In addition, the term "water-soluble" means that it can finally be dissolved in water at 20°C by 1 mass% or more.

Carboxylic acid-modified polyvinyl alcohol resins have carboxyl groups introduced and have carboxylic acid-modified polyvinyl alcohol sites.

The carboxylic acid-modified polyvinyl alcohol resin can be exemplified by those obtained by graft copolymerization or block copolymerization of polyvinyl alcohol and a vinyl carboxylic acid compound; the vinyl ester compound and the vinyl carboxylic acid compound After copolymerization, those obtained by saponification; and those obtained by reacting polyvinyl alcohol with a carboxylating agent, etc. Examples of the aforementioned vinyl carboxylic acid compounds include acrylic acid, methacrylic acid, maleic acid (anhydride), phthalic acid (anhydride), itaconic acid (anhydride), and trimellitic acid (anhydride) ) Etc. compounds containing carboxyl groups or their anhydrides. Examples of the vinyl ester compounds include vinyl acetate, vinyl formate, vinyl propionate, vinyl neodecanoate, and trimethyl vinyl acetate. Examples of the carboxylating agent include succinic anhydride, maleic anhydride, acetic anhydride, trimellitic anhydride, phthalic anhydride, pyromellic anhydride, glutaric anhydride, hydrogenated phthalic anhydride, And naphthalene dicarboxylic anhydride. Carboxylic acid-modified polyvinyl alcohol is commercially available from Mitsubishi CHEMICAL Corporation, Japan VAM & POVAL Corporation, KURARAY Corporation, etc., and these commercially available products can be used in the present invention.

The number average polymerization degree and saponification degree of the carboxylic acid-modified polyvinyl alcohol resin are not particularly limited. For the saponification degree of carboxylic acid-modified polyvinyl alcohol resin, the partial saponification degree is preferably 85 mol% or more and 90 mol% or less. The reason is that it is possible to improve the peelability of the transfer paper from the fabric, or to further suppress the occurrence of defects such as peeling off of the pattern formed on the fabric, uneven color, and low color development.

Acrylic resin is a general term for polymers or copolymers mainly composed of derivatives of acrylic acid and its esters, and derivatives of methacrylic acid and its esters. The main system means that derivatives of acrylic acid and its esters and derivatives of methacrylic acid and its esters account for 51% by mass or more of the entire resin. Examples of the acrylic ester include methyl acrylate, ethyl acrylate, butyl acrylate, ethylhexyl acrylate, 2-dimethylaminoethyl acrylate, and 2-hydroxyethyl acrylate. In addition, examples of the methacrylate include methyl methacrylate, ethyl methacrylate, butyl methacrylate, ethylhexyl methacrylate, 2-dimethylaminoethyl methacrylate, and methyl 2-Hydroxyethyl acrylate, etc. In the present invention, copolymers of acrylonitrile, acrylamide, N-methylolacrylamide and the like are also included in the acrylic resin.

Acrylic resin is produced by East Asia Synthetic Company, Japan Catalyst Company, Japan Coating Resin The company, Idemitsu Kosei Corporation, and Mitsubishi CHEMICAL Corporation are commercially available, and these commercially available products can be used in the present invention.

The glass transition point (Tg) of acrylic resin is 0°C or higher and 45°C or lower. In addition, the minimum film-forming temperature (MFT) of the acrylic resin is 0°C or more and 50°C or less. When the acrylic resin does not meet these physical property value ranges, the transfer paper cannot be peeled off from the fabric at an economically satisfactory speed, or the pattern formed on the fabric can not be prevented from being peeled off, uneven in color, and low in color development. situation.

The setting of the glass transition point (Tg) of acrylic resin can be performed by setting the mass ratio of monomers such as acrylic resin according to the following Fox formula.

<Fox style> 1/Tg=(W1/Tg1)+(W2/Tg2)+…+(Wm/Tgm) W1+W2+…+Wm=1

In the formula, Tg represents the glass transition point of acrylic resin. Tg1, Tg2, ..., Tgm represent the glass transition point of each monomer. In addition, W1, W2,..., Wm represents the mass ratio of each monomer. The glass transition point of each monomer in the aforementioned Fox formula may be, for example, the value described in Polymer Handbook Third Edition (Wiley-Interscience, 1989). The glass transition point system can be obtained by measurement using, for example, a differential scanning calorimeter EXSTAR 6000 (manufactured by SEIKO Electronics Co., Ltd.), DSC220C (manufactured by SEIKO Electronics Co., Ltd.), DSC-7 (manufactured by Perkinelmer Co., Ltd.), and the baseline and endotherm The point of intersection of the oblique lines of the peaks serves as the glass transition point.

The so-called minimum film-forming temperature (MFT) means the minimum required temperature for the thermoplastic resin particles to form a film. This MFT can use, for example, Muroi Izu's "Chemistry of Polymer Latex" (Polymer Press conference, published in 1987) and other temperature gradient plate method. The temperature gradient plate method is described in ISO-2115: 1996 [Plastics--Polymer dispersion--Determination of white point temperature and minimum film-forming temperature].

Starch is a polysaccharide in which glucose is polymerized by glycoside bonds, and polysaccharides in which glucose is polymerized by glycoside bonds are modified by using various substituents to modify the hydroxyl group possessed by glucose carbohydrate. Examples of starches include esterified starches such as starch, oxidized starch, enzyme-modified starch, etherified starch, cationic starch, amphoteric starch, dialdehyde starch, phosphated starch, and urea phosphated starch. , Hydroxyethylated starch, hydroxypropylated starch and hydroxybutylated starch.

In the outermost coating layer, the content of the water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin, and starch is preferably: based on the dry solid content, relative to the carboxylic acid-modified polyvinyl alcohol resin 100 parts by mass, the water-soluble polyester resin is 25 parts by mass or more and 75 parts by mass or less, the acrylic resin is 25 parts by mass or more and 75 parts by mass or less, and the starches are 100 parts by mass or more and 200 parts by mass or less.

In addition to the water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin, and starch, the outermost coating layer can also contain a binder that has been well-known in the field of coated paper. Examples of the binder include water-soluble synthetic resins, water-dispersible synthetic resins, resins derived from natural ingredients, and resins obtained by physically or chemically modifying these resins. Specific examples of the binder include various modified derivatives except for polyvinyl alcohol resins and carboxylic acid modified polyvinyl alcohol resins, urethane resins, polyamide resins, and vinyl acetate Resins, styrene butadiene copolymer resins, polyester resins other than water-soluble polyester resins, polyvinyl acetal resins, proteins, casein, gelatin, etherified Damarine gum, etherified locust bean gum, Etherified guar gum Gum and other polysaccharides other than gums such as rubber, cellulose and modified derivatives of cellulose such as carboxymethyl cellulose and hydroxyethyl cellulose, and starches such as sodium alginate.

The total content of the water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and starch in the outermost coating layer is relative to the water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin and As for the binder in the outermost coating layer of starch, it is better to occupy 85% by mass or more.

White pigments are previously known white pigments in the field of coated paper. Examples of the white pigment include heavy calcium carbonate, light calcium carbonate, various kaolins, clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, and aluminum silicate , Diatomaceous earth, calcium silicate, magnesium silicate, amorphous silica, colloidal silica, aluminum hydroxide, aluminum oxide, aluminum oxide hydrate, lithopone, zeolite, magnesium carbonate, magnesium hydroxide Inorganic white pigments such as inorganic white pigments, styrene-based plastic pigments, acrylic plastic pigments, styrene-acrylic plastic pigments, polyethylene, microcapsules, urea resins, melamine resins and other organic white pigments.

The white pigment in the outermost coating layer is preferably at least one containing amorphous silicon oxide. Amorphous silicon oxide can be roughly classified into wet silicon oxide and gas phase silicon oxide according to the manufacturing method. Furthermore, wet-process silicon oxide can be classified into sedimentation silicon oxide and gel silicon oxide according to the manufacturing method. The silica by sedimentation method can be produced by reacting sodium silicate with sulfuric acid under alkaline conditions. The grown silica particles are aggregated, settled, and then produced through the steps of filtration, water washing, drying, crushing, and classification. The sedimentation method silicon oxide system is, for example, Nipsil (registered trademark) by TOSOH‧SILICA, FINESIL (registered trademark) by Oriental Silicas Corporation (OSC), TOKUSIL (registered trademark), and MIZUKASIL (registered trademark) by Mizusawa Chemical Industries It is marketed by Toyota Chemical Company as SILICA GEL. Gel oxygen Silica can be produced by reacting sodium silicate with sulfuric acid under acidic conditions. Because the fine particles of silicon oxide dissolve during aging and re-precipitate in such a way as to combine with other primary particles, the clear primary particles of the gel-processed silicon oxide disappear and form harder aggregated particles with internal void structures. The gel method silicon oxide system is commercially available as Nipgel (registered trademark) from TOSOH‧SILICA, SYLOID (registered trademark) and SYLOJET (registered trademark) from Grace Japan, for example. The gas-phase method is also known as the dry method relative to the wet method, and the gas-phase method of oxidizing silicon can usually be produced by flame hydrolysis method. Specifically, a method of burning silicon tetrachloride together with hydrogen and oxygen is generally known. It is also possible to use silanes such as methyltrichlorosilane and trichlorosilane alone instead of silicon tetrachloride, or to use silanes such as methyltrichlorosilane and trichlorosilane together with silicon tetrachloride. Vapor-phase method silicon oxide systems are commercially available from, for example, AEROSIL (registered trademark) by AEROSIL Corporation of Japan, and REOLOSIL (registered trademark) by Tokuyama Corporation. The amorphous silicon oxide system is preferably silicon oxide by sedimentation.

In at least one embodiment, the amorphous silicon oxide contains larger particles with a particle size of 10 μm or more. The reason is that the transfer paper and the cloth are properly adhered, and the peelability of the transfer paper from the cloth is improved. Preferably, the amorphous silicon oxide has a volume-based average particle diameter determined by laser diffraction/scattering particle size distribution measurement of 6.6 μm or more and 41 μm or less. More preferably, the average particle size on the same volume basis is 19 μm or more and 41 μm or less. Even more preferably, the average particle size on the same volume basis is 27 μm or more and 40 μm or less. Preferably, the average particle size on the same volume basis is 27 μm or more and 37 μm or less. This can improve the peelability of the transfer paper from the fabric.

In at least one embodiment, the particle size distribution of amorphous silicon oxide has an appropriate broadness. That is, the amorphous silicon oxide has a particle size distribution curve obtained by laser diffraction/scattering particle size distribution measurement in which the horizontal axis is the particle size and the vertical axis is the frequency of the number of particles. Zero as The ratio (D80/D20) of the particle diameter D20 of the cumulative frequency of the starting point of 20% by volume to the particle diameter D80 of the cumulative frequency of 80% of the starting frequency with a particle diameter of zero is 2.5 or more and 5.5 or less. Preferably, the ratio (D80/D20) is 2.9 or more and 4.5 or less. More preferably, the ratio (D80/D20) is 3.2 or more and 4.3 or less. As a result, it is possible to suppress the occurrence of defects such as peeling off of the pattern formed on the fabric, unevenness in color, and low color development, and/or to improve the peelability of the transfer paper from the fabric.

"The volume-based average particle diameter obtained by laser diffraction/scattering particle size distribution measurement", and "The horizontal axis obtained by laser diffraction/scattering particle size distribution measurement is the particle size and The vertical axis is the volume-based particle size distribution curve of the frequency of the number of particles, the particle size D20 with a cumulative frequency of 20 vol% with a particle size of zero as the starting point, and the particle size with a cumulative frequency of 80 vol% with a particle size of zero as the starting point "D80" can be measured and calculated using, for example, a laser diffraction/scattering particle size distribution analyzer Microtrac MT3000II manufactured by Nikkiso Co., Ltd.

The amorphous silicon oxide satisfying the aforementioned average particle diameter and/or the aforementioned ratio (D80/D20) can be obtained, for example, by crushing and particle size classification of amorphous silicon oxide having larger particles. In addition, the amorphous silicon oxide can be obtained by mixing amorphous silicon oxide having a relatively small average particle diameter and amorphous silicon oxide having a relatively large average particle diameter. Alternatively, as the amorphous silicon oxide, a commercially available product satisfying the aforementioned average particle diameter and/or the aforementioned ratio (D80/D20) can be used.

In the outermost coating layer, the content of the white pigment is preferably 15 parts by mass or more and 40 parts by mass or less relative to 100 parts by mass of the carboxylic acid-modified polyvinyl alcohol resin based on the dry solid content.

The outermost coating layer consists of acrylic resin and starch containing water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, Tg of 0°C to 45°C and MFT of 0°C to 50°C, and White pigment, while having excellent peeling ability to fabric Appropriate adhesion to fabrics, as well as dye inks, good acceptance during printing and release during transfer, as a result, it is possible to suppress defects such as shedding, uneven coloring, and low color development of the patterns formed on the fabric situation.

In addition to the water-soluble polyester resin, carboxylic acid-modified polyvinyl alcohol resin, acrylic resin, starch, and white pigment, the outermost coating layer can also contain various additives previously known in the field of coated paper as needed. Examples of additives include dispersing agents, fixing agents, cationizing agents, tackifiers, fluidity improvers, defoaming agents, release agents, foaming agents, penetrating agents, colorants, fluorescent enhancers Whitening agent, ultraviolet absorber, antioxidant, preservative, antifungal agent, etc.

In addition, the outermost coating layer can contain various additives conventionally known in the transfer printing method. The auxiliary agent is added to optimize various physical properties of the coating liquid of the outermost coating layer, or to improve the dyeability to the fabric, and the like. Examples of the auxiliary agent include various surfactants, pH adjusting agents, alkaline agents, concentrated dyeing agents, degassing agents, and anti-reducing agents.

In terms of the embodiment, the transfer paper of the present invention is used in a transfer printing method, which uses acid ink containing an acid dye to print a pattern on the transfer paper as a transfer paper, by using The aforementioned transfer paper is closely adhered to the nylon cloth and heated and pressurized to transfer the acid dye from the transfer paper to the nylon cloth. After the transfer, the transfer paper is peeled from the nylon cloth and then the nylon cloth is subjected to steam treatment .

Acid printing ink refers to printing ink containing acid dye as color material. It is possible to add acidic dyes belonging to colorants to various solvents such as water and alcohol to prepare acidic ink. The acid ink can contain various additives such as dispersants, resins, penetrants, humectants, tackifiers, pH adjusters, antioxidants, and reducing agents, which are well-known in the past. In addition, the acid printing ink system is commercially available Made.

嗪系酸性染料、胺基酮系酸性染料、二苯并哌喃(xanthene)系酸性染料、喹啉系酸性染料、三苯基甲烷系酸性染料及蒽醌系酸性染料等。就酸性染料而言，例如能夠舉出：C.I.Acid Yellow 1、3、11、17、18、19、23、25、36、38、40、40：1、42、44、49、59、59：1、61、65、72、73、79、99、104、110、159、169、176、184、193、200、204、207、215、219、219：1、220、230、232、235、241、242、246等黃色系染料；C.I.Acid Orange 3、7、8、10、19、24、51、56、67、74、80、86、87、88、89、94、95、107、108、116、122、127、140、142、144、149、152、156、162、166、168等橙色系染料；C.I.Acid Brown 2、4、13、14、19、28、44、123、224、226、227、248、282、283、289、294、297、298、301、355、357、413等棕色系染料；C.I.Acid Red 1、6、8、9、13、18、27、35、37、52、54、57、73、82、88、97、97：1、106、111、114、118、119、127、131、138、143、145、151、183、195、198、211、215、217、225、226、249、251、254、256、257、260、261、265、266、274、276、277、289、296、299、315、318、336、337、357、359、361、362、364、366、399、407、415等紅色系染料；C.I.Acid Violet 17、19、21、42、43、47、48、49、54、66、78、90、97、102、109、126等紫色系染料；C.I.Acid Blue 1、7、9、15、23、25、40、61：1、62、72、74、80、83、 90、92、103、104、112、113、114、120、127、127：1、128、129、138、140、142、156、158、171、182、185、193、199、201、203、204、205、207、209、220、221、224、225、229、230、239、249、258、260、264、277：1、278、279、280、284、290、296、298、300、317、324、333、335、338、342、350等藍色系染料；C.I.Acid Green 9、12、16、19、20、25、27、28、40、43、56、73、81、84、104、108、109等綠色系染料；C.I.Acid Black 1、2、3、24、24：1、26、31、50、52、52：1、58、60、63、107、109、112、119、132、140、155、172、187、188、194、207、222等黑色系染料等各種顏色的染料。 Acid dyes are registered as "CIAcid" in databases such as the Colour Index International as colorants. It has -SO ₃ Na or -COOH as a functional group in the molecule. Acid dyes include mono-azo acid dyes, disazo acid dyes,

Acid dyes based on azines, acid dyes based on aminoketones, acid dyes based on xanthene, acid dyes based on quinoline, acid dyes based on triphenylmethane, acid dyes based on anthraquinone, etc. Examples of acid dyes include: CIAcid Yellow 1, 3, 11, 17, 18, 19, 23, 25, 36, 38, 40, 40: 1, 42, 44, 49, 59, 59: 1 , 61, 65, 72, 73, 79, 99, 104, 110, 159, 169, 176, 184, 193, 200, 204, 207, 215, 219, 219: 1, 220, 230, 232, 235, 241 , 242, 246 and other yellow dyes; CIAcid Orange 3, 7, 8, 10, 19, 24, 51, 56, 67, 74, 80, 86, 87, 88, 89, 94, 95, 107, 108, 116 , 122, 127, 140, 142, 144, 149, 152, 156, 162, 166, 168 and other orange dyes; CIAcid Brown 2, 4, 13, 14, 19, 28, 44, 123, 224, 226, 227 , 248, 282, 283, 289, 294, 297, 298, 301, 355, 357, 413 and other brown dyes; CIAcid Red 1, 6, 8, 9, 13, 18, 27, 35, 37, 52, 54 , 57, 73, 82, 88, 97, 97: 1, 106, 111, 114, 118, 119, 127, 131, 138, 143, 145, 151, 183, 195, 198, 211, 215, 217, 225 , 226, 249, 251, 254, 256, 257, 260, 261, 265, 266, 274, 276, 277, 289, 296, 299, 315, 318, 336, 337, 357, 359, 361, 362, 364 , 366, 399, 407, 415 and other red dyes; CIAcid Violet 17, 19, 21, 42, 43, 47, 48, 49, 54, 66, 78, 90, 97, 102, 109, 126 and other purple dyes ; CIAcid Blue 1, 7, 9, 15, 23, 25, 40, 61: 1, 62, 72, 74, 80, 83, 90, 92, 103, 104, 112, 113, 114, 120, 127, 127 : 1, 128, 129, 138, 140, 142, 156, 158, 171, 182, 185, 193, 199, 201, 203, 204, 205, 207, 209, 220, 221, 224, 225, 229, 230 , 239, 249, 258, 260, 264, 277: 1, 278, 279, 280, 284, 290, 296, 298, 300, 317, 324, 333, 335, 338, 342, 350 and other blue dyes; CIAcid Green 9, 12, 16, 19, 20, 25, 27, 28, 40, 43, 56, 73, 81, 84, 104, 108, 109 and other green dyes; CIAcid Black 1, 2, 3, 24, 24: 1, 26, 31, 50, 52, 52: 1, 58, 60, 63, 107, 109, 112, 119, 132, 140, 155, 172, 187, 188 , 194, 207, 222 and other black dyes and other colors of dyes.

The transfer paper can be obtained by printing the pattern on the transfer paper using dye ink. Printing is performed on the side of the transfer paper with the outermost coating layer. Examples of the printing method include a gravure printing method, a screen printing method, and an inkjet printing method. Regarding the method of printing patterns, because the image quality and the degree of freedom of the ink used are high, the inkjet printing method is preferred.

Heating and pressurizing the transfer paper and the cloth in close contact means that the printing surface of the transfer paper printed with the pattern and the surface to be dyed and printed on the cloth face each other to make them adhere to each other, and heat and pressurize in the close state. The conditions for heating and pressurizing the transfer paper and the cloth in close contact are the conditions well known in the transfer printing method. The heating and pressurization performed by adhering the transfer paper to the fabric can be, for example, a method of heating and pressurizing the transfer paper adhering to the fabric using a press, a heating roller, and a drum.

The peeling of the transfer paper from the cloth is to physically peel the transfer paper from the cloth from the cloth and the transfer paper in an adhering state. The peeling method is a previously well-known method and is not particularly limited. For example, a roll-shaped transfer paper and cloth in a state where the transfer paper and the cloth are in close contact can be cited Silk, a method of peeling by individually winding to the roller.

The steam treatment is a treatment for fixing the dye after transfer from the transfer paper to the fabric. Steam treatment is also referred to as wet-fixation treatment and is a previously well-known treatment in the field of printing and dyeing. Typically, the steam treatment includes the atmospheric steam method, the HT steam method, and the HP steam method. In general, the atmospheric steam method uses a wet heat treatment at about 100°C for 15 to 30 minutes, the HT steam method uses a wet heat treatment at 150 to 180°C for 5 to 10 minutes, and the HP steam method Fixing of the dye to the fiber is carried out by wet heat treatment at 120 to 135°C for 20 to 40 minutes. After the steam treatment, it is better to wash the cloth with water.

The fibers constituting the fabric are any of natural fibers, synthetic fibers, and these composite fibers. Examples of natural fibers include cellulose-based fiber materials such as cotton, hemp, lyocell, rayon, and acetate, and protein-based fibers such as silk, wool, and animal hair. Examples of synthetic fibers include polyamide (nylon), vinylon, polyester, polyacrylic acid, and the like. In at least one embodiment, the cloth is nylon cloth.

[Example]

Hereinafter, the present invention will be described in more detail by examples. Moreover, the present invention is not limited by these embodiments. Here, "parts by mass" and "mass%" refer to "parts by mass" and "mass%" of dry solid content or substantial component, respectively. The coating amount of the coating layer indicates the dry solid content.

<base paper>

To a pulp slurry composed of 100 parts by mass of LBKP with a water filtration of 380 ml csf (according to CANADIAN STANDARD FREENESS TESTER), add 10 parts by mass of calcium carbonate as a filler, 1.2 parts by mass of amphoteric starch, 0.8 parts by mass of aluminum sulfate, 0.1 parts by mass of alkyl ketene dimer type sizing agent, and papermaking using a long wire paper machine, and using a sizing press device to oxidize starch 1.5 per side g/m ² is attached to both sides and processed by a mechanical calender to produce a base paper with a basis weight of 50 g/m ² .

<Substrate 1>

A high-density polyethylene is provided with a non-aqueous resin layer on one side of the base paper so that the thickness becomes 15 μm using a melt extrusion die, thereby obtaining a substrate 1 having a non-aqueous resin layer.

<Substrate 2>

The base paper described above is used as the base material 2.

<coating layer coating liquid>

Using water as a medium, the coating liquid for the coating layer was prepared by the following formulation. The concentration of the final coating layer coating liquid was set to 15% by mass.

In Tables 1 to 5, the following are used for each material system. In addition, Plas Coat, KURARAY POVAL, Gohsenx, Mowinyl, Penon, TOKUSIL and FINESIL are registered trademarks.

Water-soluble polyester resin: Plas Coat RZ-142

Polyvinyl alcohol resin A: KURARAY KURARAY POVAL 6-77KL carboxylic acid modification Saponification degree 74 to 80mol%

Polyvinyl alcohol resin B: KURARAY company KURARAY POVAL 25-88KL carboxylic acid modification Saponification degree 85 to 90mol%

Polyvinyl alcohol resin C: KURARAY company KURARAY POVAL 32-97KL carboxylic acid modification Saponification degree 95 to 99mol%

Polyvinyl alcohol resin D: Mitsubishi CHEMICAL company GohsenxT-350 carboxylic acid modification Saponification degree 93 to 95mol%

Polyvinyl alcohol resin E: KURARAY KURARAY POVAL 22-88 saponification degree 87 to 89mol%

Acrylic resin A: Japan Coating Resin Mowinyl 731A Tg=0℃/MFT=0℃

Acrylic resin B: Japan Coating Resin Mowinyl 727 Tg=5℃/MFT=25℃

Acrylic resin C: Japan Coating Resin Mowinyl 6520 Tg=41℃/MFT=50℃

Acrylic resin D: Japan Coating Resin Mowinyl 718A Tg=-6℃/MFT=0℃

Acrylic resin E: Japan Coating Resin Mowinyl 742A Tg=45℃/MFT=53℃

Starch: Hydroxyalkylated starch, Penon JE-66

Amorphous silicon oxide A: OSC TOKUSIL GU-N average particle size 17.8μm

Amorphous silica B: OSC TOKUSIL NP average particle size 10.3μm

Amorphous silicon oxide C: OSC FINESIL X60 Average particle size 6.6μm

Amorphous silicon oxide D: MIZUKASIL P78F Average particle size 19μm

Amorphous silicon oxide E: Toyota Chemical Company SILICA GEL A white 200 UNDER average particle size 47μm

[Table 1]

[Table 2]

[table 3]

[Table 4]

[table 5]

<transfer paper>

The coating liquid for the coating layer was applied to one side of the substrate using an air knife coater, and dried using a hot air dryer, using this coating layer as the outermost coating layer, and finally, a roll-shaped transfer paper was prepared. The coating amount is set to 20 g/m ² . In the substrate 1, the side having the non-aqueous resin layer is coated and dried.

<transfer paper>

For the above-mentioned roll-shaped transfer paper, an inkjet printer (VJ-1628TD, manufactured by Muto Industries Co., Ltd.) equipped with acid ink containing acid dye is used, and acid ink containing acid dye (cyan blue ( cyan), magenta, yellow, and black) and print the evaluation pattern on the side of the transfer paper with the outermost coating layer, and finally obtain a roll-shaped transfer paper. Acid printing inks containing acid dyes use EA printing inks manufactured by Jihe Chemical Industry Company.

<transfer printing>

Use nylon fabric without pretreatment as the fabric. The printing surface of the transfer paper and the surface of the nylon cloth to be printed are transported toward each other, and the transfer paper and the nylon cloth are adhered to each other by a roller clamping method with a heating cylinder to perform heating and pressurization. The heating and pressurizing conditions were set at a temperature of 120°C, a linear pressure of 70 kg/cm, and a time of 0.5 seconds.

<Peeling of transfer paper>

Peel the transfer paper from the nylon cloth by individually winding the transfer paper and the nylon cloth to the roller by individually winding the transfer paper and the nylon cloth to the roller.

<evaluation of divestiture>

By visually observing the peeling of the transfer paper from the nylon cloth, the functional evaluation was performed according to the following criteria. The results are described in Tables 1 to 5. In the present invention, when evaluated as A to C, the transfer paper The system is rated as having no practical problems and can be peeled from the nylon cloth.

A: It can be peeled off smoothly.

B: It can be peeled off by pulling more strongly than the above A.

C: It can be peeled at a lower speed than the above B.

D: At a lower speed than the above C, it can only be slowly peeled off.

From a productive point of view, it is not good.

E: The transfer paper is damaged and peeling is difficult.

<Steam treatment of nylon cloth>

The roll-shaped nylon fabric from which the transfer paper has been peeled off is transferred from an unwinder to a winder, and during this period, a wet heat treatment at 100 to 105°C and 20 to 30 minutes is performed using an atmospheric steam method.

<washing>

After the steam treatment, the obtained nylon cloth was washed in accordance with the procedure of [normal temperature water washing]→[50°C water washing]→[normal temperature water washing].

<Evaluation of patterns>

Regarding the pattern formed on the nylon cloth, from the standpoints of shedding, uneven color, and low color development, functional evaluation was performed based on the following criteria. The results are described in Tables 1 to 5. In the present invention, when the evaluations are A to C, the transfer paper system is evaluated as being able to suppress the occurrence of defects such as shedding, uneven color, and low color development of the pattern formed on the nylon cloth.

A: Shedding, uneven color, and low hair color were not observed and were good.

B: Some shedding, uneven color, and/or low color development can be observed, but it is generally good.

C: Poor than B above, shedding, uneven coloring and/or low hair color can be observed, but Practically no problem level.

D: It is worse than the above C, and peeling, uneven color, and/or low color development can be observed, which is unfavorable.

From Tables 1 to 5, it is understood that Examples 1 to 23 that satisfy the constitutional requirements of the present invention can practically remove the transfer paper from the nylon cloth without problems before being steamed, and can be suppressed at the nylon cloth The formed pattern has such undesirable conditions as shedding, uneven color, and low hair color.

However, Comparative Examples 1 to 9 that do not satisfy the constitutional requirements of the present invention have a problem in at least one of the evaluation of peeling and the evaluation of patterns. In particular, in Comparative Example 1, the acrylic resin of the outermost coating layer has a low glass transition point (-6°C), so there is a problem with the peeling of the transfer paper. In Comparative Example 2, the minimum film-forming temperature of the acrylic resin of the outermost coating layer is high ( 53°C), so there is a problem with the peeling of the transfer paper. In Comparative Example 3, because the polyvinyl alcohol resin of the outermost coating layer is not modified with carboxylic acid, there is a problem with the peeling of the transfer paper. Comparative Example 4 has no There is a problem with both the peeling of the transfer paper and the evaluation of the pattern because of the water-based resin layer. In Comparative Example 5, because the outermost coating layer does not contain a water-soluble polyester resin, the evaluation of the pattern is problematic. In Comparative Example 6, the outermost coating The layer does not contain carboxylic acid-modified polyvinyl alcohol resin, so both the peeling of the transfer paper and the evaluation of the pattern have problems. Comparative Example 7 Because the outermost coating layer does not contain acrylic resin, there is a problem with the evaluation of the pattern. Comparative Example 8 Because the outermost coating layer does not contain starches, there is a problem with both the peeling of the transfer paper and the evaluation of the pattern. In Comparative Example 9, since the outermost coating layer does not contain the white pigment, there is a problem with the peeling of the transfer paper.

From Table 4, it is known that at least one of the white pigments is amorphous silica and the average particle size of the volume-based amorphous silica obtained by laser diffraction/scattering particle size distribution measurement is 27 μm or more Moreover, 40 μm or less is preferable.

Also, from Table 4, the volume-based particle size distribution curve of the frequency of the amorphous silicon oxide obtained by the laser diffraction/scattering particle size distribution measurement on the horizontal axis is the particle size and the vertical axis is the number of particles In the ratio, the ratio (D80/D20) of the particle diameter D20 with the cumulative frequency of 20% by volume as the starting point to the particle diameter D80 with the cumulative frequency of 80% by volume as the starting point (D80/D20) is 2.9 or more and 4.5 The following is better.

Claims (3)

A transfer paper, which is used to transfer the printing pattern before printing the printing pattern of the printing and dyeing method. The transfer printing and dyeing method is to make the transfer paper obtained by printing the pattern with the dye ink closely adhere to the cloth, and by heating and adding The dye is transferred from the transfer paper to the fabric, and after the transfer paper is peeled off from the fabric, the fabric is subjected to steam treatment; the transfer paper includes: one or more layers of non-paper on one side of the base paper The base material of the water-based resin layer, and one or more coating layers on the aforementioned non-aqueous resin layer; wherein the outermost coating layer positioned at the outermost position with the base material as a reference contains at least a water-soluble polyester Resin, carboxylic acid modified polyvinyl alcohol resin, acrylic resin and starch, and white pigments, the acrylic resin has a glass transition point (Tg) of 0°C or more and 45°C or less and a minimum film forming temperature (MFT) of 0°C Above and below 50℃. The transfer paper as described in item 1 of the patent application range, wherein at least one of the white pigments contains amorphous silicon oxide, and the volume basis is determined by laser diffraction/scattering particle size distribution measurement The average particle diameter of the amorphous silicon oxide is 27 μm or more and 40 μm or less. The transfer paper as described in item 2 of the patent application scope, wherein the amorphous silicon oxide has a particle diameter on the horizontal axis and a number of particles on the vertical axis obtained by laser diffraction/scattering particle size distribution measurement In the volume-based particle size distribution curve of the frequency, the ratio of the particle size D20 of the cumulative frequency of 20 vol% with the particle size of zero as the starting point to the particle size D80 of the cumulative frequency of 80 vol% with the particle size of zero as the starting point (D80 /D20) is 2.9 or more and 4.5 or less.