JP6488258B2 - Non-coated paper type transfer paper - Google Patents

Description

  The present invention relates to a non-coated paper type transfer paper used for transferring a pattern in a transfer printing method for forming a pattern on a substrate such as a fiber material.

  As a method of forming a pattern on a printed material such as a textile material, the pattern is printed on a transfer paper using sublimation dye ink to produce a transfer paper, the transfer paper is adhered to the printed material, and the sublimation dye ink is used. A transfer textile printing method for transferring to a substrate is known (see, for example, Patent Document 1 and Patent Document 2).

Transfer paper used for transfer textile printing is known.
For example, a sheet-like substrate can be used as a sublimation transfer sheet that is excellent in water-based ink absorptivity and capable of obtaining a clear recorded image without bleeding and excellent in ink transfer efficiency to a transfer object during sublimation transfer. Material and an ink receiving layer provided on one side or both sides of the sheet-like base material, and the ink receiving layer contains a pigment, a binder, and a cationic resin. Examples of the binder include starch, starch derivatives, A sublimation transfer sheet is known in which any one of polyvinyl alcohol and modified polyvinyl alcohol or a mixture of two or more thereof is used (see, for example, Patent Document 3).
In addition, it has excellent ink absorption and drying properties in ink jet printing using sublimation textile printing ink, and has good workability, image reproducibility on the surface of transfer paper, heat resistance during heat transfer, after transfer As a sublimation type ink jet printing transfer paper having good properties in terms of image reproducibility and transfer efficiency on the surface of the transferred material, the sublimation type printing ink receiving layer has a sublimation type printing ink receiving layer on a substrate. Contains a water-soluble resin and fine particles, contains the synthetic amorphous silica as the fine particles, and in the relative value of the ultrasonic transmission intensity on the sublimation type printing ink receiving layer side of the sublimation type ink jet printing transfer paper. A sublimation type ink jet printing transfer paper having a minimum value peak within a measurement time of 3 seconds is known (see, for example, Patent Document 4).

  As described in Patent Document 3 and Patent Document 4, an inkjet printing method is used as a method for producing a transfer paper by printing a pattern on a transfer paper using an ink containing a sublimation dye or a sublimation printing ink. Often used.

JP2015-168705A Japanese Patent Laying-Open No. 2015-124324 JP 2010-158875 A JP 2010-058335 A

It is necessary to have two contradictory characteristics between a transfer sheet, which is a white paper before the pattern is printed, and a transfer sheet obtained by printing the pattern on the transfer sheet. That is, the transfer paper is required to have an ability to successfully receive the sublimation dye ink, and the transfer paper is required to have an ability to transfer the sublimation dye ink to the printing material.
Since the transfer paper becomes a transfer paper having a sharp image so as not to deteriorate the image quality of the pattern formed on the substrate, it is necessary to improve the acceptability for the sublimation dye ink. Furthermore, it is necessary for the transfer paper not to deteriorate the image quality of the pattern formed on the substrate from the transfer paper having a sharp image.
On the other hand, when the transfer paper has improved acceptability of the transfer paper with respect to the sublimation dye ink, the transfer of the sublimation dye ink may be insufficient at the time of transfer for forming a pattern on the substrate. As a result, color reduction occurs in the substrate.

Further, since the transfer is performed by bringing the transfer paper and the printing material into close contact with each other, the transfer paper must be able to make good contact with the printing material. In the case of continuously transferring to a printing material, the transfer is performed by bringing the roll paper-like transfer paper and the printing material into close contact with each other. In particular, in order to proceed the transfer continuously, it is more important that the transfer paper is in close contact with the substrate.
Further, in order to efficiently transfer the dye from the transfer paper to the printing material, the transfer paper needs to accept the sublimation dye ink without penetrating the paper deeply. That is, the transfer paper is required to have “through-through suppression”. “Back-through” is a phenomenon in which the sublimation dye ink of the image printed on the transfer paper penetrates to the deep part of the paper.

  The sublimation transfer sheet of Patent Document 3 and the sublimation ink jet printing transfer paper of Patent Document 4 have an ink receiving layer and an ink receiving layer. However, in the market, non-coated paper type transfer paper having no ink receiving layer or ink receiving layer is required from the viewpoint of product cost.

In view of the above, an object of the present invention is to provide a non-coated paper type transfer paper satisfying the following items.
(1) Deterioration of image quality on printed materials can be suppressed (image degradation resistance)
(2) The ability to suppress a decrease in color development on the substrate (color development)
(3) The transfer paper and the substrate to be in good contact (adhesion)
(4) Suppression of back-through in transfer paper (back-through suppression)

As a result of intensive studies to solve the above problems, the inventors of the present invention can achieve the objects of the present invention as follows.
[1] A non-coated paper type transfer paper used in a transfer printing method using a sublimation dye ink, which contains pulp, filler and urea phosphate esterified starch.

  [2] The non-coated paper type transfer paper according to [1], wherein the filler is calcium carbonate.

  [3] The non-coated paper type transfer paper according to [1] or [2], wherein the non-coated paper type transfer paper contains a polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound. .

  According to the present invention, it is possible to provide a transfer paper that has good image deterioration resistance, good color developability, excellent adhesion, and excellent anti-through-through property.

The present invention is described in detail below.
In the present invention, the “transfer sheet” refers to a sheet in a blank state before a pattern to be transferred is printed. “Transfer paper” refers to paper on which a pattern to be transferred to the transfer paper is printed. In the present invention, the “non-coated paper mold” refers to a paper that does not have a clear coating layer that can be distinguished when a cross section of the transfer paper is observed with an electron microscope. Furthermore, in the present invention, for example, when a resin component or a polymer component is applied, and the applied component is absorbed by the paper and the cross section of the transfer paper is observed with an electron microscope, a clear coating layer that can be distinguished is formed. If not, include in uncoated paper mold.

The non-coated paper type transfer paper of the present invention contains pulp, filler, and urea phosphated starch. The non-coated paper type transfer paper of the present invention can be obtained by the following method (A) or (B). The method is preferably (B) because the adhesiveness is good with a small content.
(A) A method of making a paper stock containing pulp, filler and urea phosphated starch.
(B) A method in which a paper stock containing pulp and filler is made, and urea phosphate esterified starch is imparted to the resulting paper made by a conventionally known coating apparatus such as a size press.
In the above-mentioned (A) or (B) paper stock, an adhesive other than urea phosphate esterified starch, a sizing agent, a fixing agent, a retention agent, a cationizing agent, a pigment dispersing agent, a thickening agent, a flow agent, and the like. Property improver, antifoaming agent, antifoaming agent, mold release agent, foaming agent, penetrating agent, coloring dye, coloring pigment, fluorescent whitening agent, ultraviolet absorber, antioxidant, preservative, antibacterial agent, water resistance Various additives conventionally known in the papermaking field, such as an agent and a paper strength enhancer, can be contained.
Paper making is performed using a conventionally known paper machine by adjusting the paper stock to be acidic, neutral or alkaline. Examples of the paper machine include a long net paper machine, a twin wire paper machine, a combination paper machine, a circular net paper machine, and a Yankee paper machine.
In the above (A), calendaring or size pressing may be performed after papermaking.
In (B), the papermaking paper obtained by papermaking may be calendered before and after the urea phosphate esterified starch is applied. The coating liquid for applying urea phosphate esterified starch to papermaking paper may contain a sizing agent and the like.

The basis weight of the non-coated paper type transfer paper is not particularly limited. From the viewpoint of ease of handling with respect to the transfer to the substrate, the basis weight of the non-coated paper type transfer paper is preferably 10 g / m ² or more and 100 g / m ² or less, more preferably 40 g / m ² or more and 90 g / m ² or less. preferable. Further, the thickness of the transfer paper is not particularly limited. From the viewpoint of easy handling with respect to the transfer to the printing material, the thickness of the transfer paper is preferably 0.01 mm or more and 0.5 mm or less, and more preferably 0.05 mm or more and 0.3 mm or less.

  Pulp is conventionally known in the papermaking field. Examples of pulp include chemical pulps such as LBKP (Leaf Bleached Kraft Pulp) and NBKP (Needle Bleached Kraft Pulp), GP (Groundwood Pulp), and PGW (Pressure GroundWood pulp). ), RMP (Refiner Mechanical Pulp), TMP (ThermoMechanical Pulp), CTMP (ChemiThermoMechanical Pulp), CMP (ChemiMechanical Pulp), CGP (ChemiGroundwood Pulp), and other pulps such as DIP (DeInked Pulp) Can do. Pulp includes non-wood pulp such as kenaf and bagasse.

  Fillers are conventionally known white pigments in the papermaking field. Examples of fillers include calcium carbonate, kaolin clay, talc, calcium sulfate, barium sulfate, titanium dioxide, zinc oxide, zinc sulfide, zinc carbonate, satin white, silicic acid. Mention may be made of white inorganic pigments such as aluminum, diatomaceous earth, alumina, lithopone, zeolite, magnesium carbonate, magnesium hydroxide. Further examples of fillers include white organic pigments such as styrene plastic pigments, acrylic plastic pigments, polyethylene, microcapsules, urea resins, and melamine resins. One or more fillers can be selected and used from these.

  The filler is preferably calcium carbonate. It is preferable that calcium carbonate accounts for 60% by mass or more in the filler. This is because color development and adhesion are more excellent due to a synergistic effect with urea phosphate esterified starch described later.

  Urea phosphate esterified starch is one type of esterified starch, and is a starch derivative in which starch and urea are heated at high temperature in the presence of phosphoric acid to introduce phosphate groups and carbamic acid groups. Urea phosphate esterified starch includes those having an alkylene group between a phosphate group and a glucose six-membered ring or between a carbamic acid group and a glucose six-membered ring. The alkylene group preferably has 1 to 3 carbon atoms, and more preferably 1 carbon atom. Urea phosphate esterified starch is commercially available from Oji Cornstarch Co., Ltd., Nippon Shokuhin Kako Co., Ltd., GS Japan Ltd., and the like.

The content of the filler in the non-coated paper type transfer paper is preferably 5 parts by mass or more and 40 parts by mass or less, more preferably 10 parts by mass or more and 30 parts by mass or less, and 15 parts by mass with respect to 100 parts by mass of the pulp. More preferred is 25 parts by mass or less.
The content of urea phosphate esterified starch in the non-coated paper type transfer paper is preferably 0.5 g / m ² or more and 4 g / m ² or less in the case of (A), and one side in the case of (B). It is preferably 0.25 g / m ² or more and 2 g / m ² or less.

  The non-coated paper type transfer paper preferably contains a polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound. The reason for this is that the image deterioration resistance and the back-through suppression are improved.

  The method of containing a polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound is as follows: (a) a polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound is blended in the paper, (B) A paper material containing pulp, filler and urea phosphate esterified starch is made, and the resulting paper is made into an aliphatic monoamine or aliphatic polyamine by a conventionally known coating apparatus such as a size press. A method of providing a polycondensation product of a bismuth and an epihalohydrin compound, (c) making a paper stock containing pulp and filler, and subjecting the resulting paper to urea phosphate esterified starch by a conventionally known coating device such as a size press And a method for providing a polycondensate of an aliphatic monoamine or aliphatic polyamine with an epihalohydrin compound Door can be. The method (b) or (c) is preferred for the inclusion of the polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound from the viewpoint of color development.

  Examples of conventionally known coating apparatuses in the methods (B), (b) and (c) are size press, gate roll coater, film transfer coater, blade coater, rod coater, air knife coater, curtain coater. Etc. The coating device is preferably a size press, a gate roll coater, or a film transfer coater installed in the paper machine from the viewpoint of manufacturing cost.

  The polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound is a kind of cationic resin, and one or more selected from an aliphatic monoamine and an aliphatic polyamine, and one or more selected from an epihalohydrin compound, Is a polycondensate of Aliphatic monoamines are, for example, monomethylamine, monoethylamine, dimethylamine, diethylamine, trimethylamine, triethylamine, mono, di or triethanolamine. Examples of the aliphatic polyamine include ethylenediamine, diethylenetriamine, triethylenetetramine, pentaethylenehexamine, hexamethylenediamine, dimethylaminoethylamine, dimethylaminopropylamine, and 1,3-diaminobutane. Examples of the epihalohydrin compound include epichlorohydrin, epibromohydrin, methyl epichlorohydrin, methyl epibromohydrin, and the like. Since the polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound is commercially available, a dimethylamine-epichlorohydrin polycondensate is preferred.

The content of the polycondensate of the aliphatic monoamine or aliphatic polyamine and the epihalohydrin compound is preferably 0.5 g / m ² or more and 3 g / m ² or less by the method (a), and the above (b) and (c) In this method, it is preferably 0.25 g / m ² or more and 1.5 g / m ² or less per side.

The transfer paper can be obtained by printing a design on the transfer paper using various conventionally known printing methods provided with sublimation dye ink.
Various printing methods for printing the design on the transfer paper are conventionally known printing methods and are not particularly limited. Examples of the printing method include a gravure printing method, an ink jet printing method, an electrophotographic printing method, a screen printing method, and the like. Among these, the ink jet printing method is preferable in terms of high image quality and downsizing of the apparatus.

  The transfer textile printing method using a sublimation dye ink is a method having a step of obtaining a transfer paper by printing a pattern on a transfer paper and a step of bringing the transfer paper into close contact with a substrate. The process of making it adhere | attach includes heating and pressurization as needed. The conditions for heating and pressurizing in the step of adhering are conventionally known conditions in the transfer printing method. Examples of the step of bringing in close contact include a method in which the transfer paper is brought into close contact with the substrate to be printed with a press or a heating drum and heated and pressurized.

  The substrate is a fiber material and is not particularly limited. The fiber material may be either a natural fiber material or a synthetic fiber material. Examples of natural fiber materials include cellulosic fiber materials such as cotton, hemp, lyocell, rayon and acetate, and protein fiber materials such as silk, wool and animal hair. Examples of the synthetic fiber material include polyamide fiber (nylon), vinylon, polyester, and polyacryl. Examples of the configuration of the fiber material include woven fabrics, knitted fabrics, nonwoven fabrics, and the like alone, mixed spinning, mixed fiber, and union. Furthermore, these configurations may be combined. Moreover, you may pre-process a to-be-printed material with the chemical | medical agent effective in dyeing | staining promotion as needed.

  Hereinafter, the present invention will be described in more detail with reference to examples. The present invention is not limited to these examples. Here, “parts by mass” and “% by mass” represent “parts by mass” and “% by mass” of the amount of dry solids or the amount of substantial components, respectively. The coating amount of the coating layer represents the dry solid content.

<Preparation of non-coated paper type transfer paper>
Example 1
In a pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of urea phosphate esterified starch, 0.8 parts by mass of sulfuric acid band, 0.1 parts of alkyl ketene dimer type sizing agent 0.1 A part by weight is added to make a paper with a long paper machine, with a size press machine on both sides, oxidized starch 1.5 g / m ² per side and dimethylamine-epichlorohydrin polycondensate 1.0 g / m ² per side. It was made to adhere and the machine calendar process was performed and the non-coated paper type | mold transfer paper of basic weight 85g / m < ² > was produced.

(Example 2)
In a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 6 parts by mass of urea phosphated starch, 0.8 parts by mass of sulfuric acid band, 0.1 parts by mass of alkyl ketene dimer type sizing agent as fillers was added and papermaking in Fourdrinier, on both sides in a size press apparatus, per side 1.5 g / m ² and dimethylamine oxidized starch - is epichlorohydrin polycondensate adhesion per one side 1.0 g / m ² Then, machine calendar processing was performed to prepare a non-coated paper type transfer paper having a basis weight of 85 g / m ² .

(Example 3)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and urea phosphate esterified starch was 0.25 g / m ² per side and dimethylamine-epichlorohydrin polycondensate was 1.0 g / m ² per side with a size press machine on both sides. It was made to adhere and machine calendar processing was carried out to produce a non-coated paper type transfer paper having a basis weight of 82.5 g / m ² .

Example 4
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and urea phosphate esterified starch was 1.0 g / m ² per side and dimethylamine-epichlorohydrin polycondensate was 1.0 g / m ² per side with a size press machine on both sides. It was made to adhere and machine calendar processing was carried out to produce a non-coated paper type transfer paper having a basis weight of 84 g / m ² .

(Example 5)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and urea phosphate esterified starch was 1.5 g / m ² per side and dimethylamine-epichlorohydrin polycondensate was 1.0 g / m ² per side with a size press machine on both sides. It was made to adhere and the machine calendar process was performed and the non-coated paper type | mold transfer paper of basic weight 85g / m < ² > was produced.

(Example 6)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and urea phosphate esterified starch was 2.0 g / m ² per side and dimethylamine-epichlorohydrin polycondensate was 1.0 g / m ² per side with a size press machine on both sides. It was made to adhere and the machine calendar process was carried out, and the non-coating paper type | mold transfer paper of basic weight 86g / m < ² > was produced.

(Example 7)
To a pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of kaolin clay, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfuric acid band, 0.1 parts by mass of an alkyl ketene dimer type sizing agent are used. It was added and made with a long paper machine, and urea phosphate esterified starch was 1.5 g / m ² per side and dimethylamine-epichlorohydrin polycondensate was 1.0 g / m ² per side with a size press machine on both sides. It was made to adhere and the machine calendar process was performed and the non-coated paper type | mold transfer paper of basic weight 85g / m < ² > was produced.

(Example 8)
A pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 380 mlcsf, 12 parts by mass of calcium carbonate and 8 parts by mass of kaolin clay, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, alkyl ketene dimer type sizing agent as fillers Add 0.1 parts by weight, make paper on a long paper machine, and on both sides with a size press machine, urea phosphate esterified starch 1.5g / m ² per side and dimethylamine-epichlorohydrin polycondensate per side 1.0 g / m ^{2 was} deposited and machine calendering was performed to prepare a non-coated paper type transfer paper having a basis weight of 85 g / m ² .

Example 9
In a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 6 parts by mass of urea phosphated starch, 0.8 parts by mass of sulfuric acid band, 0.1 parts by mass of alkyl ketene dimer type sizing agent as fillers Is added, and the paper is made with a long net paper machine, and with a size press device, 1.5 g / m ^{2 of} oxidized starch is adhered to both sides of each side, machine calendering is performed, and a basis weight of 83 g / m ² is not applied. A paper-type transfer paper was prepared.

(Example 10)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and urea phosphate esterified starch was attached to both sides with a size press machine at 1.5 g / m ² on both sides, and machine calender treatment was carried out, and the basis weight was 83 g / m ² . A coated paper type transfer paper was prepared.

(Example 11)
In a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 6 parts by mass of urea phosphated starch, 0.8 parts by mass of sulfuric acid band, 0.1 parts by mass of alkyl ketene dimer type sizing agent as fillers , 1.6 parts by mass of dimethylamine-epichlorohydrin polycondensate was added, and paper making was carried out with a long net paper machine. Oxide starch was adhered to both sides with a size press machine at 1.5 g / m ² per side, and machine calendar treatment Thus, a non-coated paper type transfer paper having a basis weight of 83 g / m ² was produced.

(Example 12)
In a pulp slurry consisting of 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate as a filler, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, 0.1 parts by mass of alkyl ketene dimer type sizing agent, 1.6 parts by mass of dimethylamine-epichlorohydrin polycondensate was added, the paper was made with a long net paper machine, and urea phosphate esterified starch was attached to both sides with a size press machine at 1.5 g / m ² per side. A non-coated paper type transfer paper having a basis weight of 83 g / m ² was prepared by calendering.

(Comparative Example 1)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It is added and made with a long paper machine, and oxidized starch is attached to both sides with a size press machine at 1.5 g / m ² per side, machine calendar treatment is performed, and the basis weight is 83 g / m ² uncoated paper. A mold transfer paper was prepared.

(Comparative Example 2)
To a pulp slurry comprising 100 parts by mass of LBKP having a freeness of 380 mlcsf, 20 parts by mass of calcium carbonate, 0.8 parts by mass of amphoteric starch, 0.8 parts by mass of sulfate band, and 0.1 parts by mass of an alkyl ketene dimer type sizing agent as fillers. It was added and made with a long paper machine, and phosphoric esterified starch was adhered to both sides with a size press machine at 1.5 g / m ² per side, machine calendering was performed, and a basis weight of 83 g / m ² was not applied. A paper-type transfer paper was prepared.

<Preparation of transfer paper>
For each transfer paper obtained as described above, an ink jet printer (JV2-130II, manufactured by Mimaki Engineering Co., Ltd.) using a sublimation dye ink is used for evaluation with sublimation dye ink (cyan, magenta, yellow, black). Was printed to obtain a transfer paper.

<Evaluation of penetration-through inhibition>
In the transfer paper obtained as described above, the see-through suppression was sensory-evaluated according to the following criteria in terms of the degree of image visibility from the back surface of the transfer paper and the image quality of the obtained printing material. In the present invention, if the evaluation is A or B, the transfer paper is excellent in the back-through suppression.
A: There is almost no see-through, and the printed image is good.
B: Slight penetration is recognized, but there is no practical problem with the printed image.
C: Back-through is recognized, which causes a problem in printed images.

<Printing (cut paper)>
A polyester cloth was used as the substrate. The obtained transfer paper and the polyester cloth are brought into close contact with each other, heated at 200 ° C. for 1 minute using a thermal transfer press (manual wide swinger Model 221 manufactured by INSTA), and the dye is transferred to the polyester cloth. It peeled from the polyester cloth and the polyester cloth in which the pattern was formed was obtained.

<Evaluation of image degradation resistance>
From the point of sharpness of the design, the image quality of the polyester cloth on which the design was formed was sensory-evaluated based on the following criteria. In the present invention, if the transfer paper is evaluated as A or B, the image deterioration resistance is good.
A: Good level.
B: Almost no deterioration in image quality is observed, and the level is generally good.
C: Deterioration in image quality is recognized, but there is no practical problem.
D: Level at which deterioration of an image which is practically impossible is recognized.

<Evaluation of color development>
The color density of three solid color sublimation dye ink colors (cyan, magenta, yellow) is measured using an optical densitometer (X-rite 530, manufactured by Sakata Inx Engineering Co., Ltd.). Totaled. The color developability was judged according to the following criteria. In the present invention, the transfer paper has good color developability if the evaluation is A or B.
A: Total value is 4.7 or more B: Total value is 4.4 or more and less than 4.7 C: Total value is less than 4.4

<Printing (roll paper)>
A rolled polyester cloth was used as the substrate. The obtained roll paper-like transfer paper and the polyester cloth are brought into close contact, and the dye is transferred to the polyester cloth using a heating and pressurizing machine (190 ° C., 0.5 MPa, 2.5 m / min, roller type), Thereafter, the transfer paper was peeled from the polyester cloth to obtain a polyester cloth on which a pattern was formed.

<Evaluation of adhesion>
From the viewpoint of the degree of occurrence of color unevenness in the solid image portion, the adhesiveness was subjected to sensory evaluation according to the following criteria for the polyester cloth on which the design was formed. In the present invention, if the transfer sheet is evaluated as A or B, it is excellent in adhesion.
A: Color unevenness is not recognized and good.
B: Color unevenness is slight and good in general.
C: Color unevenness is observed, but there is no practical problem.
D: Color unevenness is recognized, which causes a problem in practical use.

  The evaluation results are shown in Table 1.

From the evaluation results in Table 1, it can be seen that Examples 1 to 12 corresponding to the present invention have image deterioration resistance and color developability, and are excellent in adhesion and back-through suppression. It can be seen that Comparative Examples 1 and 2 that do not satisfy the configuration of the present invention cannot obtain the effects of the present invention.
Mainly from the comparison of Example 5, Example 7 and Example 8, it is understood that 60% by mass or more of the filler is preferably calcium carbonate in terms of color development and adhesion.
From the comparison between Example 2 and Example 9 and Example 11 and the comparison between Example 5 and Example 10 and Example 12, the non-coated paper type transfer paper is aliphatic monoamine or aliphatic. It can be seen that inclusion of a polycondensation product of a polyamine and an epihalohydrin compound is preferable in terms of image deterioration resistance and anti-through-through resistance.

Claims (3)

  A non-coated paper type transfer paper used for transfer printing using a sublimation dye ink, comprising pulp, filler and urea phosphated starch.   The non-coated paper type transfer paper according to claim 1, wherein the filler is calcium carbonate.   The non-coated paper type transfer paper according to claim 1 or 2, wherein the non-coated paper type transfer paper contains a polycondensate of an aliphatic monoamine or aliphatic polyamine and an epihalohydrin compound.