Transfer paper

Abstract

A transfer paper used for a transfer printing method using sublimation textile ink, comprising a base paper and one or more coating layer(s) provided on at least one side of the base paper, wherein an outermost coating layer positioned on the outermost side with respect to the base paper contains at least a pigment, a binder, a polyacrylic acid salt and an acetylene glycol derivative, has image deterioration resistance, good color development property and excellent adhesion property.

Claims

1. A transfer paper used for a transfer printing method using sublimation textile ink, comprising a base paper and one or more coating layer(s) provided on at least one side of the base paper, wherein an outermost coating layer positioned on the outermost side with respect to the base paper contains at least a pigment, a binder, a polyacrylic acid salt and an acetylene glycol derivative, wherein the polyacrylic acid salt is ammonium polyacrylate.

2. The transfer paper according to claim 1, wherein, in the outermost coating layer, a content of the polyacrylic acid salt is 0.1 parts by mass or more and 3.5 parts by mass or less based on 100 parts by mass of the binder.

3. The transfer paper according to claim 1, wherein a weight average molecular weight of the ammonium polyacrylate measured by gel permeation chromatography method is 5,000 or more and 30,000 or less.

4. The transfer paper according to claim 1, wherein at least one of the pigment in the outermost coating layer is precipitated calcium carbonate having an average secondary particle diameter of 2 μm or more and 6 μm or less in which primary particles having an average long diameter/average short diameter ratio of 2.0 or more and 7.0 or less are radially aggregated at one end in the long diameter direction, and a content of the precipitated calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer.

5. The transfer paper according to claim 4, wherein an air permeability obtained by measuring the side provided with the outermost coating layer according to ISO 5636-3 is more than 100 ml/min and 320 ml/min or less.

6. The transfer paper according to claim 2, wherein a weight average molecular weight of the ammonium polyacrylate measured by gel permeation chromatography method is 5,000 or more and 30,000 or less.

7. The transfer paper according to claim 2, wherein at least one of the pigment in the outermost coating layer is precipitated calcium carbonate having an average secondary particle diameter of 2 μm or more and 6 μm or less in which primary particles having an average long diameter/average short diameter ratio of 2.0 or more and 7.0 or less are radially aggregated at one end in the long diameter direction, and a content of the precipitated calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer.

8. The transfer paper according to claim 7, wherein an air permeability obtained by measuring the side provided with the outermost coating layer according to ISO 5636-3 is more than 100 ml/min and 320 ml/min or less.

9. The transfer paper according to claim 3, wherein at least one of the pigment in the outermost coating layer is precipitated calcium carbonate having an average secondary particle diameter of 2 μm or more and 6 μm or less in which primary particles having an average long diameter/average short diameter ratio of 2.0 or more and 7.0 or less are radially aggregated at one end in the long diameter direction, and a content of the precipitated calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer.

10. The transfer paper according to claim 9, wherein an air permeability obtained by measuring the side provided with the outermost coating layer according to ISO 5636-3 is more than 100 ml/min and 320 ml/min or less.

11. The transfer paper according to claim 6, wherein at least one of the pigment in the outermost coating layer is precipitated calcium carbonate having an average secondary particle diameter of 2 μm or more and 6 μm or less in which primary particles having an average long diameter/average short diameter ratio of 2.0 or more and 7.0 or less are radially aggregated at one end in the long diameter direction, and a content of the precipitated calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer.

12. The transfer paper according to claim 11, wherein an air permeability obtained by measuring the side provided with the outermost coating layer according to ISO 5636-3 is more than 100 ml/min and 320 ml/min or less.

Description

EXAMPLES

(1) Hereinafter, the present invention will be described in more detail by examples. It should be noted that the present invention is not limited to these examples. Here, “part by mass” and “% by mass” each represent “parts by mass” and “% by mass” of a dry solid content or a substantial component amount. A coating amount of a coating layer represents a dry solid content.

(2) <Base Paper>

(3) 10 parts by mass of calcium carbonate as a filler, 1.2 parts by mass of amphoteric starch, 0.8 part by mass of aluminum sulfate, and 0.1 parts by mass of alkyl ketene dimer type sizing agent were added to a pulp slurry comprising 100 parts by mass of LBKP having a freeness degree of 380 ml csf to form a paper stock, and the paper stock was made into a papermaking paper by a fourdrinier papermaking machine. 1.5 g/m.sup.2 of oxidized starch per one side was adhered on both sides of the papermaking paper with a size press machine, and then machine calendering processing was carried out to prepare a base paper having a basis weight of 62 g/m.sup.2.

(4) <Outermost Coating Layer-Coating Composition>

(5) The outermost coating layer-coating composition was prepared by mixing and dispersing in water using the materials shown in Table 1.

(6) The amount of each material contained in the outermost coating layer-coating composition is also shown in Table 1.

(7) In Table 1, silica A is NIPGEL® AY-200 manufactured by TOSOH SILICA CORPORATION. Silica B is MIZUKASIL® P-527 manufactured by MIZUSAWA INDUSTRIAL CHEMICALS, LTD. Precipitated calcium carbonate is TamaPearl® TP221F (calcite type crystal, average long diameter/average short diameter=2.0, non-formation of secondary particle) manufactured by OKUTAMA KOGYO CO., LTD. Acetylene glycol derivative A is Surfynol 104E (the structure of the general formula (1)) manufactured by Nissin Chemical Industry Co., Ltd. Acetylene glycol derivative B is Olfine E1010 (structure of the general formula (2)) manufactured by Nissin Chemical Industry CO., Ltd. Acetylene alcohol is Olfine B manufactured by Nissin Chemical Industry Co., Ltd. Except for Examples 24 and 25, ammonium polyacrylate having a weight average molecular weight of about 22,000 as measured by gel permeation chromatography method was used. Ammonium polyacrylate used in Examples 24 and 25 is the one having a weight average molecular weight of about 6,000 as measured by gel permeation chromatography method.

(8) <Transfer Paper>

(9) A transfer paper was prepared by the following procedure.

(10) On the base paper, the outermost coating layer-coating composition was coated on one side with an air knife coater, and dried in a hot air dryer. After that, it was subjected to calendering processing to obtain a transfer paper. The coated amount was shown in Table 1.

(11) TABLE-US-00001 TABLE 1 Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Materials ple 1 ple 2 ple 3 ple 4 ple 5 ple 6 ple 7 ple 8 ple 9 ple 10 ple 11 Silica A 20 30 40 0 0 0 0 0 0 0 0 Silica B 0 0 0 20 20 20 20 20 20 20 20 Precipitated calcium carbonate 0 0 0 0 0 0 0 0 0 0 0 Carboxymethyl cellulose 80 70 60 80 80 80 80 80 80 80 80 Phosphate esterified starch 0 0 0 0 0 0 0 0 0 0 0 Sodium polyacrylate 0 0 0 0 0 0 0.2 0 0 0 0 Ammonium polyacrylate 0.2 0.2 0.2 0.2 0.1 0.4 0 0.2 0.2 0.2 0.05 Polyacrylamide 0 0 0 0 0 0 0 0 0 0 0 Acetylene glycol derivative A 0 0 0 0 0 0 0 0 0 0.2 0.2 Acetylene glycol derivative B 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.1 0.5 0 0 Acetylene alcohol 0 0 0 0 0 0 0 0 0 0 0 Coated amount (g/m.sup.2) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 Mass ratio of polyacrylic acid 0.25 0.29 0.33 0.25 0.13 0.50 0.25 0.25 0.25 0.25 0.06 salt content Image deterioration resistance B B A B B B C B C B B Color development property B B B B B B B B B B B Adhesion property A A B A A A A B A A B Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Materials ple 12 ple 13 ple 14 ple 15 ple 16 ple 17 ple 18 ple 19 ple 20 ple 21 ple 22 ple 23 Silica A 0 0 0 0 0 0 0 0 0 0 0 0 Silica B 0 0 0 0 0 0 0 0 0 0 0 0 Precipitated calcium carbonate 50 60 70 70 70 70 70 70 70 70 80 70 Carboxymethyl cellulose 50 40 30 30 30 30 30 30 10 20 20 30 Phosphate esterified starch 0 0 0 0 0 0 0 0 20 10 0 0 Sodium polyacrylate 0 0 0 0 0 0.7 0 0 0 0 0 0 Ammonium polyacrylate 0.7 0.7 0.7 0.5 1.0 0 0.7 0.7 0.7 0.7 0.7 1.2 Polyacrylamide 0 0 0 0 0 0 0 0 0 0 0 0 Acetylene glycol derivative A 0 0 0 0 0 0 0 0.2 0 0 0 0 Acetylene glycol derivative B 0.2 0.2 0.2 0.2 0.2 0.2 0.5 0 0.2 0.2 0.2 0.2 Acetylene alcohol 0 0 0 0 0 0 0 0 0 0 0 0 Coated amount (g/m.sup.2) 10 10 10 10 10 10 10 10 10 10 10 10 Mass ratio of polyacrylic 1.40 1.75 2.33 1.67 3.33 2.33 2.33 2.33 2.33 2.33 3.50 4.00 acid salt content Image deterioration resistance B B A A B C C A A A A B Color development property A A A A A B B A A A A B Adhesion property A A B B B B A B B B B B Exam- Exam- Com. Com. Com. Com. Com. Com. Com. Com. Com. Com. Materials ple 24 ple 25 Ex. 1 Ex. 2 Ex. 3 Ex. 4 Ex. 5 Ex. 6 Ex. 7 Ex. 8 Ex. 9 Ex. 10 Silica A 0 0 0 0 0 0 0 0 0 0 0 0 Silica B 20 0 20 20 20 20 0 0 0 0 0 0 Precipitated calcium carbonate 0 70 0 0 0 0 0 70 70 70 70 0 Carboxymethyl cellulose 80 30 80 80 80 80 80 30 30 30 30 30 Phosphate esterified starch 0 0 0 0 0 0 20 0 0 0 0 70 Sodium polyacrylate 0 0 0 0 0 0 0 0 0 0 0 0 Ammonium polyacrylate 0.2 0.7 0 0.2 0.2 0 0.2 0 0.7 0.7 0 0.7 Polyacrylamide 0 0 0 0 0 0.2 0 0 0 0 0.7 0 Acetylene glycol derivative A 0 0 0 0 0 0 0 0 0 0 0 0 Acetylene glycol derivative B 0.2 0.2 0.2 0 0 0.2 0.2 0.2 0 0 0.2 0.2 Acetylene alcohol 0 0 0 0 0.2 0 0 0 0 0.2 0 0 Coated amount (g/m.sup.2) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 10 10 10 10 10 Mass ratio of polyacrylic acid 0.25 2.33 0.00 0.25 0.25 0.00 0.20 0.00 2.33 2.33 0.00 0.70 salt content Image deterioration resistance B A B B B C D A A A A D Color development property B A C B B C A C A A C A Adhesion property A B B C C B D B C C B D

(12) “Mass ratio of polyacrylic acid salt content” in Table 1 is the content of the polyacrylic acid salt based on 100 parts by mass of the binder in the outermost coating layer.

(13) <Preparation of Printed Transfer Paper>

(14) Evaluation patterns with sublimation dye inks (cyan, magenta, yellow) were printed on each transfer paper obtained using an inkjet printer (JV 2-130 II, manufactured by Mimaki Engineering Co., Ltd.) using sublimation textile ink to obtain each printed transfer paper.

(15) <Textile Printing (Cut Paper)>

(16) A polyester fabric was used as a printing substrate. The resultant printed transfer paper and the polyester fabric were brought into close contact with each other and heated at 200° C. for 1 minute using a thermal transfer press (manual wide swinger Model 221, manufactured by Insta Graphic Systems) to transfer the dye to the polyester fabric, and then the printed transfer paper was peeled off from the polyester fabric to obtain a polyester fabric having a pattern formed thereon.

(17) <Evaluation of Image Deterioration Resistance>

(18) From the viewpoint of the sharpness of the pattern, the image deterioration resistance of the polyester fabric having the pattern formed thereon was visually evaluated according to the following criteria. In the present invention, if the evaluation is A, B or C, the transfer paper is judged to have image deterioration resistance.

(19) A: Good level.

(20) B: Deterioration of image quality is hardly recognized and it is generally good level.

(21) C: Deterioration of image quality is recognized, but it is practically problem free level.

(22) D: Level at which deterioration of image which becomes practically unusable is recognized.

(23) <Evaluation of Color Development Property>

(24) In the textile printed printing substrate, the color density of the solid image portion of three sublimation textile inks (cyan, magenta, yellow) was measured with an optical densitometer (X-rite 530, manufactured by SAKATA JINX ENG. CO., LTD.), and color density values of three colors were added up. Color development property was judged according to the following criteria. In the present invention, if the evaluation is A or B, the transfer paper is judged to have good color development property.

(25) A: Total value is 4.7 or more

(26) B: Total value is 4.4 or more and less than 4.7

(27) C: Total value is less than 4.4

(28) <Textile Printing (Roll Paper)>

(29) Polyester fabric of scroll was used as a printing substrate. The resultant roll paper-state printed transfer paper and the polyester fabric were brought into close contact with each other, and the dye was transferred to the polyester fabric using a heating and pressing machine (200° C., 0.5 MPa, 2.5 m/min, roller type, contact time with rollers for 30 seconds). Thereafter, the printed transfer paper was peeled off from the polyester fabric to obtain a polyester fabric having a pattern formed thereon.

(30) <Evaluation of Adhesion Property>

(31) From the viewpoint of the degree of occurrence of out-of-focus and distortion of the pattern, the polyester fabric having the pattern formed thereon was visually evaluated on adhesion property according to the following criteria. In the present invention, if the evaluation is A or B, the transfer paper is judged to have excellent adhesion property.

(32) A: Out-of-focus and distortion are not observed, and it is good level.

(33) B: Out-of-focus and distortion are scarcely observed, and it is generally good level.

(34) C: Out-of-focus and distortion are observed, but it is practically problem free level.

(35) D: Out-of-focus and distortion are observed, and it is a problematic level in practical use.

(36) The evaluation results are shown in Table 1.

(37) From the evaluation results in Table 1, it is understood that Examples 1 to 25, each of which corresponds to a transfer paper in which the outermost coating layer contains a pigment, a binder, a polyacrylic acid and an acetylene glycol derivative, have image deterioration resistance, color development property and adhesion property. However, it is understood that Comparative Examples 1 to 10, each of which does not correspond to the above transfer paper, cannot satisfy any of image deterioration resistance, color development property or adhesion property.

(38) From the comparison between mainly Examples 4 to 6 and 14 to 16 and mainly Examples 11 and 23, it is understood that, in the outermost coating layer, the content of the polyacrylic acid salt is preferably in the range of 0.1 part by mass or more and 3.5 parts by mass or less based on 100 parts by mass of the binder.

(39) From the comparison between mainly Examples 4 and 14 and mainly Examples 7 and 17, it is understood that polyacrylic acid salt is preferably ammonium polyacrylate.

(40) It is understood that the weight average molecular weight of ammonium polyacrylate as measured by gel permeation chromatography is preferably 5,000 or more and 30,000 or less from Examples 1 to 23 in which that weight average molecular weight is about 22,000 and Examples 24 and 25 in which it is about 6,000.

(41) Next, the following outermost coating layer-coating composition was prepared.

(42) <Outermost Coating Layer-Coating Composition>

(43) The outermost coating layer-coating composition was prepared by mixing and dispersing in water using the materials shown in Table 2.

(44) The amount of each material contained in the outermost coating layer-coating composition is also shown in Table 2.

(45) TABLE-US-00002 TABLE 2 Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Materials ple 26 ple 27 ple 28 ple 29 ple 30 ple 31 ple 32 ple 33 ple 34 ple 35 ple 36 Precipitated calcium carbonate 50 50 50 60 70 80 50 50 80 80 80 Kaolin 0 0 0 0 0 0 0 0 0 0 0 Silica 0 0 0 0 0 0 0 0 0 0 0 Carboxymethyl cellulose 50 50 50 40 30 20 50 50 20 20 20 Sodium polyacrylate 0 0 0 0 0 0 0 0 0 0 0 Ammonium polyacrylate 0.1 0.5 0.7 0.7 0.7 0.7 0.7 0.7 0.5 0.5 0.1 Acetylene glycol derivative A 0 0 0 0 0 0 0 0 0 0 0 Acetylene glycol derivative B 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Acetylene alcohol 0 0 0 0 0 0 0 0 0 0 0 Coated amount (g/m.sup.2) 10 10 10 10 10 10 18 18 5 5 5 Air permeability (ml/min) 106 101 98 145 206 230 65 51 273 290 325 Strike-through suppression A A A A A A A A A A B property Ink absorption property B B B A A A B B B B B Image deterioration A A A A A A A A A A A resistance Fog resistance A A B A A A B B A A A Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Exam- Materials ple 37 ple 38 ple 39 ple 40 ple 41 ple 42 ple 43 ple 44 ple 45 ple 46 ple 47 ple 48 Precipitated calcium carbonate 70 70 70 70 70 70 70 70 60 56 56 70 Kaolin 0 0 0 0 0 0 0 0 10 14 0 0 Silica 0 0 0 0 0 0 0 0 0 0 14 0 Carboxymethyl cellulose 30 30 30 30 30 30 30 30 30 30 30 30 Sodium polyacrylate 0 0 0.7 0 0 0 0 0.7 0 0 0 0 Ammonium polyacrylate 0.7 0.7 0 0.7 0.7 0.7 0.7 0 0.7 0.7 0.7 0.7 Acetylene glycol derivative A 0 0 0 0 0 0 0 0 0 0 0 0.2 Acetylene glycol derivative B 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0 Acetylene alcohol 0 0 0 0 0 0 0 0 0 0 0 0 Coated amount (g/m.sup.2) 10 10 10 10 10 10 10 10 10 10 10 10 Air permeability (ml/min) 189 171 173 181 182 174 186 187 157 136 245 202 Strike-through suppression A A A A A B A A A B B A property Ink absorption property B B B B B B A A A B B A Image deterioration A A B A A A A B A A A A resistance Fog resistance B B B B B A A A A B B A

(46) The materials used and shown in Table 2 are shown below.

Precipitated Calcium Carbonate of Examples 26 to 36

(47) Callite® SA manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(48) Aragonite Type Crystal

(49) Average long diameter/average short diameter=6.5

(50) Average secondary particle diameter=3.3 μm, burr-shape

Calcium Carbonate of Example 37

(51) TamaPearl TP-121SA manufactured by OKUTAMA KOGYO CO., LTD.

(52) Calcite type crystal

(53) Average long diameter/average short diameter=4.0

(54) Average secondary particle diameter=3.5 burr-shape

Precipitated Calcium Carbonate of Examples 38 and 39

(55) TamaPearl TP-221BM manufactured by OKUTAMA KOGYO CO., LTD.

(56) Calcite type crystal

(57) Average long diameter/average short diameter=3.0

(58) Average secondary particle diameter=4.0 μm, burr-shape

Precipitated Calcium Carbonate of Example 40

(59) TamaPearl TP-121S manufactured by OKUTAMA KOGYO CO., LTD.

(60) Calcite type crystal

(61) Average long diameter/average short diameter=4.0

(62) Average secondary particle diameter=4.3 μm, burr-shape

Precipitated Calcium Carbonate of Example 41

(63) TamaPearl TP-121MS manufactured by OKUTAMA KOGYO CO., LTD.

(64) Calcite type crystal

(65) Average long diameter/average short diameter=3.0

(66) Average secondary particle diameter=2.3 μm, burr-shape

Precipitated Calcium Carbonate of Example 42

(67) Tunex® E manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(68) Calcite type crystal

(69) Average long diameter/average short diameter=3.0

(70) Average secondary particle diameter=5.6 μm, burr-shape

Precipitated Calcium Carbonate of Examples 43 and 44

(71) Callite KT manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(72) Aragonite type crystal

(73) Average long diameter/average short diameter=6.7

(74) Average secondary particle diameter=2.6 μm, burr-shape

Precipitated Calcium Carbonate of Examples 45 and 46

(75) Callite SA manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(76) Aragonite type crystal

(77) Average long diameter/average short diameter=6.5

(78) Average secondary particle diameter=3.3 μm, burr-shape

Kaolin of Examples 45 and 46

(79) HG 90 manufactured by J.M. Huber Corporation

(80) Average particle diameter=0.19 μm

Precipitated Calcium Carbonate of Example 47

(81) Callite SA manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(82) Aragonite type crystal

(83) Average long diameter/average short diameter=6.5

(84) Average secondary particle diameter=3.3 μm, burr-shape

Silica of Example 47

(85) Finesil® X-37 manufactured by Oriental Silicas Corporation

(86) Average particle diameter=2.6 μm

(87) Precipitated calcium carbonate of Example 48

(88) Callite® SA manufactured by SHIRAISHI CALCIUM KAISHA, LTD.

(89) Aragonite type crystal

(90) Average long diameter/average short diameter=6.5

(91) Average secondary particle diameter=3.3 μm, burr-shape

(92) <Transfer Paper>

(93) A transfer paper was prepared by the following procedure.

(94) On the base paper, the outermost coating layer-coating composition was coated on one side with an air knife coater, and dried in a hot air dryer. After that, it was subjected to calendering processing to obtain a transfer paper. The air permeability of the transfer paper was adjusted according to the coating amount and/or the calendering processing conditions. The coated amount was shown in Table 2.

(95) <Preparation of Printed Transfer Paper>

(96) Evaluation patterns with sublimation textile inks (cyan, magenta, yellow, black) were printed on each transfer paper obtained using an inkjet printer (JV2-130 II, manufactured by Mimaki Engineering Co., Ltd.) using sublimation textile ink to obtain each printed transfer paper (roll paper).

(97) <Evaluation of Strike-Through Suppression Property>

(98) From the degree of the image visibility from the back side of the printed transfer paper, the printed transfer paper obtained as described above was visually evaluated for strike-through suppression property according to the following criteria. In the present invention, if the evaluation is A or B, the transfer paper is judged to have strike-through suppression property.

(99) A: Strike-through is almost not observed, and it is a good level.

(100) B: Although strike-through is slightly observed, it is a practically acceptable level for subsequent transfer.

(101) C: Strike-through is observed and it is a problematic level in practical use for subsequent transfer.

(102) <Evaluation of Ink Absorption Property>

(103) After leaving the printed transfer paper obtained as described above at 23±1° C. and 50±2% RH for 5 hours, each color outline portion and knocked out portion were evaluated according to the following criteria for the printed matter near the roll core of the roll paper. In the present invention, if the evaluation is A or B, the transfer paper is judged to have ink absorption property.

(104) A: Bleeding is not observed in each color outline portion and knocked out portion by microscopic observation (×25).

(105) B: Slight bleeding is observed in each color outline portion and knocked out portion by microscopic observation (×25). Such slight bleeding is hardly observed by visual observation, and there is no problem in practical use.

(106) C: Bleeding is observed in each color outline portion and knocked out portion by microscopic observation (×25). Such bleeding is recognized slightly by visual observation, which is a problem in practical use.

(107) D: Bleeding is observed in each color outline portion and knocked out portion by visual observation.

(108) <Textile Printing (Roll Paper)>

(109) Polyester fabric of scroll was used as a printing substrate. The resultant roll paper-state printed transfer paper and the polyester fabric were brought into close contact with each other, and the dye was transferred to the polyester fabric using a heating and pressing machine (200° C., 0.5 MPa, 2.5 m/min, roller type, contact time with rollers for 30 seconds). Thereafter, the printed transfer paper was peeled off from the polyester fabric to obtain a polyester fabric having a pattern formed thereon.

(110) <Evaluation of Image Deterioration Resistance>

(111) From the viewpoint of the sharpness of the pattern, the image deterioration resistance of the polyester fabric having the pattern formed thereon was visually evaluated according to the following criteria. In the present invention, if the evaluation is A, B or C, the transfer paper is judged to have image deterioration resistance.

(112) A: Good level.

(113) B: Deterioration of image quality is hardly recognized and it is generally good level.

(114) C: Deterioration of image quality is recognized, but it is practically problem free level.

(115) D: Level at which deterioration of image which becomes practically impossible is recognized.

(116) <Evaluation of Fog Resistance>

(117) With respect to the fog resistance, the presence or absence of spot stain on the printing substrate was observed with a magnifying glass and visually, and visually evaluated according to the following criteria. In the present invention, if the evaluation is A or B, the transfer paper is judged to have good fog resistance.

(118) A: With a magnifying glass, no spot stains were observed, and it is good level.

(119) B: By visual observation, spot stains were not observed and it is roughly good level.

(120) C: By visual observation, spot stains which do not cause trouble is found but it is practically acceptable level.

(121) D: By visual observation, spot stains that become defective are recognized, and it is practically unusable level.

(122) The evaluation results are shown in Table 2 above.

(123) From the evaluation results in Table 2, it is understood that Examples 26 to 48, each of which corresponds to the transfer paper wherein at least one of the pigment in the outermost coating layer is precipitated calcium carbonate having an average secondary particle diameter of 2 μm or more and 6 μm or less in which primary particles having an average long diameter/average short diameter ratio of 2.0 or more and 7.0 or less are radially aggregated at one end in the long diameter direction, and a content of the precipitated calcium carbonate is 80 parts by mass or more based on 100 parts by mass of the pigment in the outermost coating layer, have image deterioration resistance, fog resistance, strike-through suppression property and ink absorption property.

(124) Mainly from the comparison between Examples 26, 27, 29 to 31, 34, 35 and 48 and Examples 28, 32, 33 and 36, the transfer paper preferably has an air permeability of more than 100 ml/min and 320 ml/min or less.

INDUSTRIAL APPLICABILITY

(125) The transfer paper according to the present invention is a useful transfer paper satisfying all of the following items.

(126) (1) Deterioration of an image in a printing substrate can be suppressed (image deterioration resistance).

(127) (2) Reduction of color development in a printing substrate can be suppressed (color development property)

(128) (3) A printed transfer paper and a printing substrate are well adhered (adhesion property)

(129) (4) Fog can be suppressed from occurring in a printing substrate (fog resistance)

(130) (5) Strike-through can be suppressed in a printed transfer paper (strike-through suppression property)

(131) (6) Ink can be absorbed so as not to bleed in a printed transfer paper (ink absorption property)