Sublimation-type inkjet textile printing transfer paper and method for producing same

1. Sublimation-type inkjet textile printing transfer paper comprising a base material and a sublimation-type textile printing ink receiving layer formed on the base material, wherein

the base material has a 10-second Cobb water absorption, conforming to JIS P 8140, of 5 to 20 g/m 2 ,

the sublimation-type textile printing ink receiving layer is made from an ink receiving layer coating material containing a water soluble resin and fine particles,

the water soluble resin is at least a sodium carboxymethyl cellulose, and the sodium carboxymethyl cellulose is contained in the ink receiving layer coating material in a ratio of 100 to 400 parts by mass with respect to 100 parts by mass of the fine particles,

the fine particles are at least inorganic fine particles having a tabular crystal structure,

the inorganic fine particles having the tabular crystal structure have a median diameter d50 in a range of 0.4 to 2.3 μm and have an aspect ratio of 5 to 30,

a coating amount (dry) of the ink receiving layer coating material is 3 to 13 g/m 2 ,

a back surface of the base material is not coated by the sublimation-type textile printing ink receiving layer, and

an average number of n-hexadecane traces at five portions is not greater than 5, the n-hexadecane traces appearing on the back surface of the base material 1 minute after one drop of n-hexadecane is dripped to each of the five portions on the sublimation-type textile printing ink receiving layer by using a dripping method based on an oil absorbency test method conforming to JIS P 3001 (1976) using n-hexadecane.

2. The sublimation-type inkjet textile printing transfer paper according to claim 1 , wherein

an under layer is formed between the sublimation-type textile printing ink receiving layer and the base material, and

the under layer contains a sodium carboxymethyl cellulose.

3. Sublimation-type inkjet textile printing transfer paper comprising a base material and a sublimation-type textile printing ink receiving layer formed on the base material, wherein

the base material has a 10-second Cobb water absorption, conforming to JIS P 8140, of 5 to 20 g/m 2 ,

the sublimation-type textile printing ink receiving layer is made from a mixed coating material of an ink receiving layer coating material A containing a water soluble resin A and fine particles A and an ink receiving layer coating material B containing a water soluble resin B and fine particles B,

in the ink receiving layer coating material A,

the water soluble resin A is at least a sodium carboxymethyl cellulose, and the sodium carboxymethyl cellulose is contained in the ink receiving layer coating material A in a ratio of 100 to 400 parts by mass with respect to 100 parts by mass of the fine particles A,

the fine particles A are at least inorganic fine particles having a tabular crystal structure, and

the inorganic fine particles having the tabular crystal structure have a median diameter d50 in a range of 0.4 to 2.3 μm and have an aspect ratio of 5 to 30,

in the case where a layer A is formed on a surface of the base material from the ink receiving layer coating material A and a back surface of the base material is not coated by the layer A, an average number of n-hexadecane traces at five portions is not greater than 5, the n-hexadecane traces appearing on the back surface of the base material 1 minute after one drop of n-hexadecane is dripped to each of the five portions on the layer A by using a dripping method based on an oil absorbency test method conforming to JIS P 3001 (1976) using n-hexadecane,

in the ink receiving layer coating material B,

the water soluble resin B is at least a sodium carboxymethyl cellulose, and

the fine particles B are at least silica particles, and

a coating amount (dry) of the mixed coating material is 2 to 12 g/m 2 .

4. The sublimation-type inkjet textile printing transfer paper according to claim 3 , wherein the sodium carboxymethyl cellulose is contained in the ink receiving layer coating material B in a ratio of 100 to 500 parts by mass with respect to 100 parts by mass of the fine particles B.

5. The sublimation-type inkjet textile printing transfer paper according to claim 3 , wherein a ratio of the ink receiving layer coating material A and the ink receiving layer coating material B in the mixed coating material (ink receiving layer coating material A/ink receiving layer coating material B) is 20/80 to 80/20 as a solid content mass ratio.

6. A production method for the sublimation-type inkjet textile printing transfer paper according to claim 3 , the production method comprising the steps of:

preparing the ink receiving layer coating material A from at least the water soluble resin A and the fine particles A;

preparing the ink receiving layer coating material B from at least the water soluble resin B and the fine particles B;

mixing the ink receiving layer coating material A and the ink receiving layer coating material B to prepare the mixed coating material; and

applying the mixed coating material onto the base material to form the sublimation-type textile printing ink receiving layer on the base material.

7. The production method according to claim 6 , wherein the mixed coating material is prepared by mixing the ink receiving layer coating material A and the ink receiving layer coating material B in a ratio of 20/80 to 80/20 (ink receiving layer coating material A/ink receiving layer coating material B) as a solid content mass ratio.

8. Sublimation-type inkjet textile printing transfer paper comprising a base material and a sublimation-type textile printing ink receiving layer formed on the base material, wherein

the base material has a 10-second Cobb water absorption, conforming to JIS P 8140, of 5 to 20 g/m 2 ,

the sublimation-type textile printing ink receiving layer is made from an ink receiving layer coating material containing at least a water soluble resin, fine particles A, and fine particles B,

the water soluble resin is at least a sodium carboxymethyl cellulose,

the fine particles A are at least inorganic fine particles having a tabular crystal structure, and the inorganic fine particles having the tabular crystal structure have a median diameter d50 in a range of 0.4 to 2.3 μm and have an aspect ratio of not less than 5,

the fine particles B are at least silica particles,

a ratio of the fine particles A and the fine particles B (fine particles A/fine particles B) is 15/85 to 90/10 as a mass ratio,

an amount of the sodium carboxymethyl cellulose in solid content is not less than the sum of 50 parts by mass with respect to 100 parts by mass of the fine particles A and 120 parts by mass with respect to 100 parts by mass of the fine particles B and not greater than 400 parts by mass with respect to 100 parts by mass in total of the fine particles A and fine particles B, and

a coating amount (dry) of the ink receiving layer coating material is 2 to 12 g/m 2 .

9. A production method for the sublimation-type inkjet textile printing transfer paper according to claim 8 , the production method comprising the steps of:

preparing a high-density dispersion of the fine particles A, then adding a solvent to the high-density dispersion in a predetermined ratio to dilute the high-density dispersion, and immediately adding and dispersing the fine particles B in an obtained diluted dispersion, to prepare a mixed dispersion slurry of the fine particles A and the fine particles B;

adding and mixing the water soluble resin into the mixed dispersion slurry to prepare the ink receiving layer coating material; and

applying the ink receiving layer coating material onto the base material to form the sublimation-type textile printing ink receiving layer on the base material.