Transfer paper for inkjet printing

Abstract

The invention is directed to a transfer paper suitable for high speed inkjet printing comprising a base layer and a film layer suitable for receiving viscous ink and releasing disperse dye from said viscous ink by having a porosity of 100 to 500 ml/min, wherein the film comprises film forming material.

Claims

1. Transfer paper suitable for high speed inkjet printing comprising a base layer and a film layer suitable for receiving viscous ink and releasing disperse dye from said viscous ink by having a porosity of 100 to 500 ml/min, wherein the film comprises film forming material, wherein the base layer comprises a base paper having a porosity of more than 1000 ml/min.

2. Transfer paper according to claim 1, wherein the film forming material comprises carboxymethyl cellulose, polyvinyl alcohol, alginate, gelatin and/or starch.

3. Transfer paper according to claim 1, wherein the film layer has a porosity of 150 to 300 ml/min.

4. Transfer paper according to claim 1, wherein the film forming material comprises 0-15 wt % of one or more fillers.

5. Transfer paper according to claim 1, wherein said one or more fillers are selected from phyllosilicate minerals, preferably mica; clay minerals, preferably kaolin, talcum, or smectite; or combinations thereof.

6. Transfer paper according to claim 1, wherein said base paper has a porosity of more than 2000 ml/min, preferably 2500-3000 ml/min.

7. Transfer paper according to claim 1, wherein the film layer has a dry weight of between 1 to 10 g/m.sup.2, preferably of between 2 to 4 g/m.sup.2.

8. Transfer paper according to claim 1, wherein the base layer has a dry weight of between 20 to 150 g/m.sup.2, preferably of between 40 to 70 g/m.sup.2.

9. Method for the production of transfer paper according to claim 1 comprising forming a film layer on the base layer by applying film forming material on at least part of the base layer and subsequently spreading the film forming material over the base layer such that the film layer homogeneously covers the base layer.

10. Method for sublimation transfer printing, wherein an image is printed by an inkjet printer on the film layer of the transfer paper according to claim 1.

11. Method according to claim 10, wherein the image is printed with viscous ink.

12. Method for sublimation transfer printing, wherein an image that has been printed on the film layer of the transfer paper according to claim 8, is transferred to a substrate by applying pressure and/or heat.

13. Use of a transfer paper accordance with claim 1 for high speed inkjet printing with viscous ink.

Description

EXAMPLE 1

(1) A mixture of bleached long and short fibers and 4% filling material was used to form paper pulp. From this paper pulp a base layer having a porosity of 2500 ml/min was formed.

(2) Next, an excess of a solution of 15 wt. % carboxymethyl cellulose (CMC, i.e. the film forming material) in water was applied on the base layer. A Meyer bar was used to remove part of the excess of the applied CMC solution such that a wet CMC layer of a wet weight of 16.6 g/m.sup.2 remained on the base layer. After drying, a film layer formed having a dry weight of 2.5 g/m.sup.2 and a porosity of 170 ml/min as determined by ISO 5636-3. The obtained transfer paper had a dry weight of 64 g/m.sup.2.

EXAMPLE 2

(3) A number of additional transfer papers were produced by a comparable method as illustrated in Example 1.

(4) All transfer papers were used in a test to determine the drying time. To this end, commercially available Sensient, Elvajet SY 370 ink was used to print a test pattern with a printer suitable for printing Kyocera inks and the drying time of the pattern was determined (see Table 1).

(5) TABLE-US-00001 TABLE 1 Drying Times of Transfer Papers Drying Time (min) Basis weight Porosity at relative ink amounts Paper # (g/m.sup.2) (ml/min) 100% 200% 300% 1 120 220 <0.3 1 3 2 64 170 1 5 9 3 64 66 2 7.5 12 4 45 10 2.5 9 12 5 70 0.5 4 11 15