JP4324215B2 - Painting transfer paper - Google Patents

Description

  The present invention relates to a water transfer paper used for painting on ceramics or the like.

For painting on inorganic materials such as pottery, glass, enamel, etc., a technique of using a transfer sheet for painting and immersing it in water and transferring the slide onto an object is widely adopted. In such a transfer paper for painting, a paint mainly composed of a pigment and a binder is applied on one side of a base paper having high water absorption, and an undercoat layer having soluble starch is formed on the base paper coating layer side, yellow dextrin Alternatively, a top coat layer containing a re-wetting paste such as carboxymethyl cellulose (CMC), a printing layer made of screen printing or offset printing, and an overcoat layer made of acrylic resin or the like are sequentially formed. In use, the painting transfer paper is immersed in water, the topcoat layer is dissolved, the painting transfer paper is applied to the surface of the object, and the printing layer is slid by hand to the target surface. Bake at high temperature.
According to the transfer paper for painting described in Patent Document 1 proposed by the present applicant, the coating layer mainly composed of a pigment and a binder serves as a seal for the undercoat layer, and the undercoat layer is smooth and constant. By forming with a thickness of, there are advantages such that the amount of starch for the undercoat layer can be reduced and ink acceptability, that is, printability is improved.
Japanese Patent No. 2593754

However, when using conventional transfer paper for painting, the water absorption unevenness of the coating layer is the cause, and due to the uneven dissolution of the undercoat layer, the transfer layer slide consisting of the topcoat layer, the printing layer, and the overcoat layer is used. It takes time and productivity decreases.In addition, a part of the undercoat layer does not fully dissolve and remains on the topcoat layer, and after transfer baking, the residue remains on the surface of the glaze and a clear pattern There was a problem that it was not possible to express.
Therefore, the main problem of the present invention is to eliminate the water absorption unevenness of the coating layer mainly composed of the pigment and the binder provided on the base paper, and has excellent sliding property at the time of water transfer, and the pattern after baking is clear. It is to provide transfer paper.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A transfer paper for painting having a water-soluble undercoat layer, a topcoat layer containing a re-wetting paste, a printing layer and an overcoat layer in order on the base paper; and, in use, the transfer paper is immersed in water In the painting transfer paper for dissolving the topcoat layer, applying the transfer paper to the surface of the object, and slidingly transferring the printing layer to the surface of the object to perform painting:
Between the base paper and the undercoat layer, a coating layer comprising a pigment and a paint mainly composed of 5 to 40 parts by weight of a binder with respect to 100 parts by weight of the pigment , and containing a penetrant and a water retention agent Have
The raw paper is the basis weight being between ^{80g / m 2 ~170g / m 2} , not calendering process is performed,
The coating layer Ri said coating layer side der water absorption degree during a contact time of 30 seconds 20 g / m ² or more 40 g / m ² or less prescribed in JIS P 8140 in the base paper containing, and, JIS in the base paper side P A transfer paper for painting , which has a water absorption of 200 g / m ² or more at a contact time of 30 seconds as defined in 8140 .

<Invention of Claim 2>
The painting transfer paper according to claim 1 , wherein 30 to 70 parts by weight of clay is contained with respect to 100 parts by weight of the pigment .

<Invention of Claim 3>
The weight ratio of the penetrant and the water retention agent is 1: 0.5 to 2.0, and the penetrant content is 0.01 parts by weight to 0.3 parts by weight with respect to 100 parts by weight of the pigment. The transfer paper for painting according to claim 1 or 2, wherein the water retention agent is 0.01 to 0.2 part by weight .

  According to the present invention, it is possible to eliminate a water absorption unevenness of a coating layer mainly composed of a pigment and a binder provided on a base paper, to have excellent sliding properties at the time of water transfer, and to provide a clear image after baking. Obtainable.

Hereinafter, embodiments of the present invention will be described in detail.
The transfer sheet for painting according to this embodiment is a coating layer mainly composed of a pigment and a binder for the purpose of sealing an undercoat layer on one side of a highly water-absorbing base paper made of 100% pulp. An undercoat layer having soluble starch, a topcoat layer containing re-wetting paste such as CMC, a printing layer by screen printing, and an overcoat layer made of an acrylic resin or the like are sequentially formed.

(Base paper)
Base paper includes chemical pulp such as softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), mechanical pulp such as thermomechanical pulp (TMP), pressurized stone grand pulp (PGW), and deinking pulp (DIP) These are used singly or as a mixture of chemical pulp such as West Pulp (WP) or waste paper pulp derived from mechanical pulp. The base paper preferably contains 80 to 100% by weight of short and short LBKP in order to improve smoothness. In the transfer paper for painting, by improving the smoothness of the base paper, not only the surface of the coating layer can be smoothed but also the occurrence of uneven coating of the paint can be prevented.

Moreover, since it is necessary to supply water to the undercoat layer formed on the coating layer instantly at the time of immersion in water, the base paper is required to have high water absorption. As the water absorption on the base paper side, the water absorption at a contact time of 30 seconds as defined in JIS P 8140 is preferably 200 g / m ² or more. When the water absorption is less than 200 g / m ² , the supply of water to the coating layer side is reduced, and as a result, the supply of water from the coating layer to the undercoat layer is also reduced. Arise. For this reason, it is preferable that a penetrating agent is internally added to the base paper as an auxiliary for increasing water absorption. In order to obtain a base paper having a water absorption of more than 40 g / m ² on the coating layer side of the base paper including the coating layer, it is necessary to use a very bulky base paper. It is difficult to ensure dry strength and paper strength when wet. In addition, although it may be possible to retroactively add bulky properties to drugs, it is necessary to contain a large amount of expensive drugs, which not only increases manufacturing costs, but also causes problems such as paper breaks in papermaking. is not.

  Examples of the penetrant include acetylene diol, acetylene glycol, ethylene oxide, propylene glycol, alkyl ether, acetylene alcohol, polyether and other simple substances, modified products thereof, and mixtures thereof. The content of the penetrant is preferably 0.1 to 3.0% by mass with respect to the solid content of the pulp. If the content of the penetrant is less than 0.1, the effect of improving the water absorption of the base paper is low, and if it exceeds 3.0% by mass, an effect commensurate with the content cannot be obtained.

It should be noted that the basis weight of the base paper is ^{80g / m 2 ~170g / m 2} . When the base weight of the base paper is less than 80 g / m ² , the rigidity becomes low and curling occurs after applying the undercoat layer, topcoat layer, printing layer and overcoat layer, which may adversely affect water transfer. If it exceeds 170 g / m ² , the thickness increases, so that there are problems such as taking time for water absorption, reducing the smoothness, and reducing the smoothness of the coating layer.

  In addition to the penetrant, the base paper may be internally added with a wet paper strength agent, a dry paper strength agent, a pitch remover, a yield improver, a dye, a pigment, and the like as necessary. Such a base paper can be made by an ordinary long net type or circular net type paper machine, and can be obtained without performing a calendar process.

(Coating layer)
The coating layer formed on the base paper is formed by applying a paint mainly composed of a pigment and a binder. The coating layer covers the irregularities due to the pulp exposed on the surface of the base paper, smoothes the surface, the smoothness of the undercoat layer and the topcoat layer provided thereon, and the printability of the printing layer, etc. Improve properties. Therefore, it is possible to obtain a transfer image by high-definition printing as compared with the conventional product.

  Examples of the pigment in the coating material forming the coating layer include inorganic pigments such as clay, talc, light calcium carbonate, heavy calcium carbonate, silica, titanium dioxide, magnesium carbonate, calcium sulfate, and mica. In addition, a pigment is not limited to these.

  As the pigment, it is particularly preferable to use clay. Heavy calcium carbonate can also be used, but heavy calcium carbonate obtained by physical grinding is not suitable for homogenizing the coating layer because the particle size distribution is broad unlike light calcium carbonate. When immersed in water, there is a possibility that inhomogeneous water permeates and the transferability is deteriorated. Since silica exhibits a secondary aggregate structure in which very fine primary particles are aggregated, it has a problem of exhibiting high water absorption and oil absorption and reducing the dispersibility of the paint. Titanium oxide has an extremely small primary particle structure, has a high pigment cost, and easily generates pinholes. Therefore, it is not practical to use it for a transfer paper for painting. Magnesium carbonate, calcium sulfate, and mica are not generally supplied for papermaking and have a problem of high cost. As described above, since pigments other than clay tend to agglomerate secondary and easily exhibit a three-dimensional structure, it is difficult to control an appropriate water penetration control effect due to the plate-like crystal structure in the thickness direction of the paper. Have.

  In order to improve the smoothness of the base paper, among 100 parts by weight of the pigment, it is preferable to contain 30 to 70 parts by weight of clay, more preferably 40 to 60 parts by weight. Since the clay has a flat crystal structure, if the clay content in the pigment is less than 30 parts by weight, it is difficult to obtain characteristics due to the flat crystal structure. The sealability of the coat layer cannot be obtained. On the other hand, when the amount exceeds 70 parts by weight, the smoothness is improved, while the voids are reduced and become too dense, and the water absorption when immersed in water is greatly reduced, and it takes time to dissolve the topcoat layer. At the same time, dissolution unevenness occurs, causing damage to the printed image and transfer unevenness.

  Also, other pigments can be used in combination, and talc having a flat plate crystal structure similar to clay can be used, but talc is highly lipophilic and has poor dispersibility in the paint, so the choice of dispersant, etc. It is likely to cause a drop in operability, such as the need to select a new auxiliary agent.

  When light calcium carbonate is contained in the pigment, fine gaps are generated in the coating layer by secondary aggregation of the spindle shape, cubic shape, columnar shape, and needle shape of the light calcium carbonate. Since water is absorbed, the water absorption from the base paper side is improved. For this reason, it is preferable to contain 5-30 weight part of light calcium carbonate in a pigment, More preferably, 10-20 weight part is contained. If the content of light calcium carbonate in the pigment is less than 10 parts by weight, there will be little generation of gaps due to secondary aggregation, and a sufficient effect of improving water absorption will not be obtained, and if it exceeds 30 parts by weight, there will be gaps due to secondary aggregation. Too much, the smoothness is lowered, and the sealability of the undercoat layer and the printability of the printing layer are also lowered.

  The penetrant contained in the paint may be any one that has a function of significantly increasing the water absorption of the coating layer. For example, acetylene diol, ethylene oxide, propylene glycol, alkyl ether, acetylene alcohol, acetylene glycol, poly A simple substance such as ether, a modified product thereof, or a mixture thereof can be used. These penetrants not only improve water absorption but also increase the fluidity of the paint and have the effect of suppressing the occurrence of streaks when the paint is applied to the surface of the base paper by blades. Among them, it is possible to obtain extremely homogeneous water penetration when the transfer paper is immersed in water, and also improves the transferability and workability of printed images. It is preferable to use a penetrant composed mainly of acetylene glycol having a function. Since the penetrant based on acetylene glycol has a low molecular weight and a high effect of lowering the surface tension, not only bubbles in the paint of the coating layer, but also when an undercoat layer is formed on the coating layer, It also has the effect of eliminating foam of paint such as starch at the interface with the coating layer and forming a uniform undercoat layer. In addition, oil-based antifoaming agents such as esters consisting of glycerin and fatty acids, which are usually used in paints, reduce the wetness of the paint itself and worsen the water absorption, but if you use a penetrant based on acetylene glycol, It is possible to defoam without reducing the wetness of the paint.

  In the transfer paper for painting according to this embodiment, a water retention agent is used in combination. The water retention agent can improve the water retention of the paint. As a result, in the coating layer containing the penetrant, the water retention is improved, so that the penetration of the binder and penetrant into the base paper is suppressed from the coating to the drying process, and the water in the coating layer is wet. Therefore, it is possible to obtain a water absorption improvement effect by a penetrating agent and a uniform coated surface at the same time, and improve transferability and transfer efficiency of a printed image.

  Examples of water retention agents include acrylic acid acrylamide copolymers, acrylic modified polymers, polyoxyalkylene fatty acid esters, and the like. Among these, the acrylic acrylamide copolymer is extremely high in swelling property at the time of water absorption, so that the penetration of the binder and the penetrant into the base paper can be suppressed, and the wetness uniformity in the coating layer is high. Since a uniform coated surface and a uniform wet state can be formed, it is particularly preferable for reasons such as smooth dissolution and transfer of the topcoat layer without causing damage to the printed image.

  The content of the penetrant is preferably 0.01 to 0.3 parts by weight, more preferably 0.02 to 0.2 parts by weight, particularly preferably 100 parts by weight of the pigment. Is 0.04 to 0.1. When the content of the penetrant is within this range, the fluidity of the coating is increased, the occurrence of streaks is suppressed, the penetration of the binder into the base paper can be prevented, and the decrease in surface strength can be prevented. When the content of the penetrant is less than 0.01 parts by weight, the effect of increasing the fluidity and water absorption of the paint is not sufficient, and when the content exceeds 0.3 parts by weight, the binder easily penetrates into the base paper. Strength will fall. Therefore, when the penetrant is contained in the paint, the fluidity of the paint is increased by setting the content of the penetrant to 0.01 to 0.3 parts by weight with respect to 100 parts by weight of the pigment. Thus, the occurrence of streaks can be suppressed, the penetration of the binder into the base paper can be prevented, and the decrease in surface strength can be prevented.

  The content of the water retention agent is preferably 0.01 to 0.2 parts by weight, more preferably 0.015 to 0.15 parts by weight, and still more preferably 0 to 100 parts by weight of the pigment. 0.02 to 0.075 parts by weight. When the content of the water retention agent is less than 0.01 parts by weight, the water retention is not improved, the binder penetrates into the base paper, and the surface strength is lowered. If the content of the water retention agent exceeds 0.2 parts by weight, the fluidity of the paint is lowered, the dispersibility of the binder is deteriorated, streaks occur, and a uniform coating layer may not be formed. . Therefore, when a water retention agent is contained in the paint, a uniform coated surface can be obtained by setting the content of the water retention agent to 0.03 to 0.15 parts by weight.

  Furthermore, as the content ratio of the penetrant and the water retention agent, when the weight of the water retention agent is 1, the weight ratio of the penetrant is preferably in the range of 0.3 to 4, more preferably 0.4 to The range is 2.7. When the weight ratio of the penetrant to the content of the water retention agent is less than 0.3, the movement of the binder and the penetrant to the base paper side can be suppressed, but the swollen water retention agent takes in the penetrant and functions as a penetrant. Since it may not work, the water absorption of the coating layer does not improve, and water absorption unevenness tends to occur. Further, when the weight ratio of the penetrant to the content of the water retention agent exceeds 4, a part of the penetrant in the paint is present without reacting with the water retention agent, and a part of the binder or penetrant is on the base paper side. As a result, the surface strength of the coating layer is greatly reduced, and the water absorption improvement effect commensurate with the content of the penetrant cannot be obtained.

  Examples of binders contained in the paint include styrene / butadiene copolymer (SBR), acrylonitrile / butadiene copolymer (NBR), acrylic ester or methacrylic ester polymer or copolymer, and ethylene / vinyl acetate copolymer. Examples of the combined latexes. In particular, among the SBR latexes, those having a styrene content of 50 to 80% by weight and styrene-rich are preferable. A styrene-rich material having a styrene content of 50 wt% to 80 wt% has a low blocking effect on the paper surface due to soft butadiene and improves smoothness, so that the flatness of the water-soluble undercoat layer can be improved. As a result, a high-definition printed image can be obtained.

  The content of the binder is preferably 5 to 40 parts by weight, more preferably 10 to 20 parts by weight as an active ingredient with respect to 100 parts by weight of the pigment because good water absorption and surface strength can be obtained. Parts by weight. By setting the binder content to 5 to 40 parts by weight with respect to 100 parts by weight of the pigment, good water absorption and surface strength can be obtained, and a suitable painting transfer paper can be obtained. When the content of the binder is less than 5 parts by weight, the surface strength is lowered and the undercoat layer provided on the upper layer is liable to cause problems such as streak and impaired surface flatness. It causes a decrease in the fineness of the image. When the content of the binder exceeds 40 parts by weight, binder migration occurs in which the latex moves to the surface of the coating layer, and a film is formed on the surface, resulting in a decrease in water absorption. Therefore, the penetration of water is inhibited when wet, and the wetness and dissolution of the topcoat layer containing the undercoat layer and the re-wetting paste is inhibited, which may lead to a decrease in workability and damage of the transferred image. Get higher.

  Further, starch may be internally added to the paint. Starch has the effect of increasing the strength of the coating layer in the same manner as latex, and for example, oxidized starch, cationized starch, esterified starch and the like can be used. Among these, esterified starch is preferable in that it contributes to improving the water retention of the paint. When starch is contained in the coating material, the starch content is preferably 0.5 to 20 parts by weight, more preferably 1.0 to 10 parts by weight with respect to 100 parts by weight of the pigment. Part. If the starch content is less than 0.5 parts by weight, the effect of increasing the strength of the coating layer is low, and if it exceeds 20 parts by weight, an effect commensurate with the amount added cannot be obtained. Therefore, when starch is contained in the paint, good water retention and surface strength can be obtained by setting the starch content to 0.5 to 20 parts by weight with respect to 100 parts by weight of the pigment. .

The painting transfer paper having such a configuration can be applied with a coating material by a coating method such as a blade coater, a roll coater, an air knife coater, or a curtain coater. Coating weight can be preferably be ^{5g / m 2 ~25g / m 2} , more preferably further is ^{8g / m 2 ~20g / m 2} , uniformly applied to the base paper. After drying, a calendar process may be appropriately performed using a soft calendar, a super calendar, or the like so that the coated surface becomes smoother.

In the transfer sheet for painting having the above-described configuration, a coating layer is formed on one side of a base paper by applying a paint mainly composed of a pigment and a binder, and is defined in JIS P 8140 on the coating layer side. The water absorption at a contact time of 30 seconds is 20 g / m ² or more. In this transfer paper for painting, by using a penetrant and a water retention agent in the coating layer, the binder and penetrant mixed in the paint will not move to the base paper, and the surface strength of the coating layer will be reduced. In addition to being suppressed, the water absorption that penetrates from the base paper side when immersed in water is increased, and there is no uneven water absorption throughout the coating layer, so there is no uneven dissolution of the undercoat layer, and the topcoat layer / printing layer / overcoat The slidability of the transfer layer in which the coat layer is integrated is improved.

The transfer paper for painting according to this embodiment preferably has a water absorption of 20 g / m ² or more and 40 g / m ² or less, more preferably a contact time of 30 seconds as defined in JIS P 8140 on the coating layer side. It is 23 g / m ² or more and 35 g / m ² or less. If the water absorption is less than 20 g / m ² , the water absorption is not sufficient, the water absorption unevenness of the water penetrating from the base paper side is not improved, and the undercoat layer has uneven dissolution at the time of water transfer, and has excellent sliding properties. The clearness of the pattern after transfer printing cannot be obtained. If it exceeds 40 g / m ² , the amount of water absorption increases, and when forming the undercoat layer, the soluble starch easily penetrates into the coating layer side and the inside of the coating layer, not only the sealing function is lowered but also uniform. In addition, it becomes difficult to form a smooth topcoat layer. Therefore, the printability of the print layer is reduced.

Hereinafter, examples according to the present invention will be described in detail with reference to comparative examples.
About the water absorption of the coating layer, the water absorption unevenness of the coating layer, the surface strength of the coating layer, the printability after processing, the sliding property of the transfer layer, and the beauty of the pattern after transfer printing on the transfer paper for painting Evaluation was made by the following method. It shows in Table 1 and Table 2 with a result.

<Water absorption of coating layer>
In accordance with JIS P 8140 (Cobb method), the water absorption after 30 seconds of contact with water was measured on the coating layer side.

<Water absorption unevenness of coating layer>
Using a jig (water absorption tester) defined in JIS P 8140, using water mixed with red ink, the water absorption state after a contact time of 10 seconds between the coating layer surface and water, that is, the water contact surface (test area) The degree of soaking progressed in 100 cm ² ) was visually observed, and water absorption unevenness was relatively evaluated according to the following criteria.
(Evaluation criteria)
5: Completely stained 4: One unstained point (size of 1 mm x 1 mm or more) 3: Two or more unstained points (size of 1 mm x 1 mm or more) 2: Less than 3 3 or more but less than 5 points (size of 1 mm × 1 mm or more) 1: 5 or more unstained points (size of 1 mm × 1 mm or more) If the evaluation is 3 to 5, transfer for painting Acceptable level for paper.

<Surface strength of coating layer>
Using an RI tester, the surface of the coating layer with the tack ink (20A) was visually observed (taken off), and the surface strength was evaluated according to the following criteria.
(Evaluation criteria)
5: No peeling 4: Little peeling 3: Conspicuous peeling 2: Conspicuous peeling 1: Conspicuously significant peeling If the rating is 3 to 5, a transfer sheet for painting is considered acceptable.

<Screen printing aptitude>
After an undercoat layer made of starch and a topcoat layer made of CMC are provided on the coating layer of the transfer paper for painting, printing by flexographic printing is performed, and the ink placement is visually observed and evaluated according to the following criteria: did.
(Evaluation criteria)
5: No white spots 4: Little white spots 3: Some white spots are noticeable 2: Many white spots are noticeable 1: Many white spots are noticeable A rating level of 3 to 5 is acceptable as a transfer sheet for painting. And

<Slidability of transfer layer>
An undercoat layer made of starch, a topcoat layer made of CMC, a printed layer by flexographic printing, and an overcoat layer made of acrylic resin are sequentially provided with a predetermined thickness on the coating layer of the transfer sheet for painting and immersed in water. The sliding property of the transfer layer in which the topcoat layer, the printing layer, and the overcoat layer were integrated from the beginning to the predetermined time was visually observed and evaluated according to the following criteria.
(Evaluation criteria)
5: The undercoat layer completely dissolves and slides 4: The undercoat layer completely dissolves but takes a long time to slide 3: A part of the undercoat layer adheres to the overcoat layer and slides 2: Over Many undercoat layers adhere to and slide on the coat layer 1: Dissolution of the overcoat layer does not proceed and does not slide If the rating is 3 to 5, the transfer sheet for painting is regarded as an acceptable level.

<Beauty of the pattern after transfer baking>
The state of the surface pattern after the slide transfer layer was transferred to a pottery and baked at a predetermined temperature and time was evaluated according to the following criteria.
(Evaluation criteria)
5: Highly glossy and clear pattern 4: Slightly dull luster, but clear pattern 3: Slightly dull luster, part of the pattern is unclear 2: Overall gloss is dull and the pattern is dull The image is unclear as a whole. 1: There is no gloss and the pattern cannot be recognized.

The base papers and paints used in the examples and comparative examples are as follows.
A suspension of hardwood bleached kraft pulp (LBKP) with a freeness of 600 cc, water and internal chemicals was made with a Yankee dryer paper machine to make a base paper. These base papers are composed of 100% by weight of hardwood bleached kraft pulp (LBKP). The base paper was internally added with a wet paper strength enhancer (manufactured by Seiko PMC, WS-4204) and a penetrant (manufactured by Seiko PMC, DF-45). Basis weight of these base paper is a 155~157g / m ^2.
The paints are clay (mean trade name Kao Fine, manufactured by Seal Co., Ltd.) having an average particle size of 0.2 μm to 0.6 μm, light calcium carbonate (trade name TP-123, manufactured by Okutama Kogyo Co., Ltd.), and heavy calcium carbonate (Imeris). Mineral Japan, trade name Carbital 90), pigments contained, styrene-butadiene latex (trade name A6200, Asahi Kasei Chemicals) as binder, acrylic acrylamide copolymer (BASF, trade name) as water retention agent Polymin AE75), esterified starch (manufactured by Sanwa Starch Co., Ltd., trade name PN-700) as starch, and acetylene glycol (manufactured by Air Products Japan, Surfynol 420E) as a penetrant were prepared.
The content of the pigment in the paint is 100 parts by weight. The mixing ratio of clay, light calcium carbonate, and heavy calcium carbonate in the pigment is 20 to 90 parts by weight for clay, 10 parts by weight for light calcium carbonate, and 10 to 70 parts by weight for heavy calcium carbonate. The content of the binder is 15 parts by weight as an active ingredient with respect to 100 parts by weight of the pigment. The starch content is 2 parts by weight with respect to 100 parts by weight of the pigment. The content of the penetrant is 0.01 to 0.3 parts by weight with respect to 100 parts by weight of the pigment, and the content of the water retention agent is 0.01 to 0.2 parts by weight as an active ingredient with respect to 100 parts by weight of the pigment. Part.
The paint transfer paper obtained by applying the prepared paint on one side of the base paper with a blade coater has a water absorption of 20 g / m ^{2 with} a contact time of 30 seconds as defined in JIS P 8140 on the coating layer side. ˜40 g / m ² .

  The present invention can be applied to a transfer sheet for painting.

Claims (3)

A transfer paper for painting having a water-soluble undercoat layer, a topcoat layer containing a re-wetting paste, a printing layer and an overcoat layer in order on the base paper; and, in use, the transfer paper is immersed in water In the painting transfer paper for dissolving the topcoat layer, applying the transfer paper to the surface of the object, and slidingly transferring the printing layer to the surface of the object to perform painting:
Between the base paper and the undercoat layer, a coating layer comprising a pigment and a paint mainly composed of 5 to 40 parts by weight of a binder with respect to 100 parts by weight of the pigment , and containing a penetrant and a water retention agent Have
The raw paper is the basis weight being between ^{80g / m 2 ~170g / m 2} , not calendering process is performed,
The coating layer Ri said coating layer side der water absorption degree during a contact time of 30 seconds 20 g / m ² or more 40 g / m ² or less prescribed in JIS P 8140 in the base paper containing, and, JIS in the base paper side P A transfer paper for painting , which has a water absorption of 200 g / m ² or more at a contact time of 30 seconds as defined in 8140 . The painting transfer paper according to claim 1 , wherein 30 to 70 parts by weight of clay is contained with respect to 100 parts by weight of the pigment . The weight ratio of the penetrant and the water retention agent is 1: 0.5 to 2.0, and the penetrant content is 0.01 parts by weight to 0.3 parts by weight with respect to 100 parts by weight of the pigment. The transfer paper for painting according to claim 1 or 2, wherein the water retention agent is 0.01 to 0.2 part by weight .