TRANSFER PAPER FOR SUBLIMATION PRINTING, COMPRISING A CATIONIC AGENT

Abstract

The invention relates to transfer paper for sublimation printing, comprising a fibrous substrate, said transfer paper having one or more cationic agents on at least one face thereof, deposited on the fibrous substrate by means of surface treatment, the amount of cationic agent(s) being greater than or equal to 8% by dry weight of the total dry weight of the compound(s) added to the fibrous substrate by means of the surface treatment.

Claims

1. Transfer paper for sublimation printing comprising a fibrous substrate, the transfer paper having on a least one face one or more cationic agents, deposited by means of a surface treatment on the fibrous substrate, the quantity of the cationic agent or agents being greater than or equal to 8% by dry weight of the total dry weight of the compound or compounds furnished by the surface treatment on the fibrous substrate.

2. Transfer paper according to claim 1, the quantity of the cationic agent or agents being greater than or equal to 9% by dry weight of the total dry weight of the compound or compounds furnished by the surface treatment on the fibrous substrate, in particular greater than or equal to 10%.

3. Transfer paper for sublimation printing according to claim 1, having on at least one face at least 0.2 g/m.sup.2 of one or more cationic agents, the transfer paper being free on this face from pigment, binder and formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, or the transfer paper comprising on this face one or more pigments and/or binders and/or formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, in an individual, or better total, quantity less than or equal to 13 times, in g/m.sup.2, the quantity of cationic agent(s).

4. Paper according to claim 3, the transfer paper comprising on said face one or more pigments and/or binders and/or formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye in a total quantity less than or equal to 12 times, in g/m.sup.2, the quantity of cationic agent(s), in particular less than or equal to 10 times, 8 times or 5 times.

5. Transfer paper according to claim 1, the cationic agent or agents being present on said face in a quantity greater than or equal to 0.2 g/m.sup.2 of one or more cationic agents, the transfer paper being free on this face from pigment, binder and formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, or the transfer paper comprising on this face one or more pigments and/or binders and/or formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, in an individual, or better total, quantity less than or equal to 13 times, in g/m.sup.2, the quantity of cationic agent(s).

6. Transfer paper according to claim 1, the transfer paper being free, at least on the face having the cationic agent or agents, from mineral load, or having on this face one or more mineral loads in a quantity less than or equal to 10 g/m.sup.2.

7. Transfer paper according to claim 1, the transfer paper being free, at least on the face having the cationic agent or agents, from binder, or having on this face one or more binders in a quantity less than or equal to 8 g/m2.

8. Transfer paper according to claim 1, the transfer paper being printable by inkjet printing.

9. Transfer paper according to claim 1, the cationic agent or agents being organic cationic agents.

10. Transfer paper according to the preceding claim, the cationic agent or agents being chosen from epichlorhydrin polyamines, in particular polyepichlorhydrin dimethylamines, poluethyleneimine and organic quaternary ammonium salts, the organic cationic agent of preference among the organic quaternary ammonium salts being in particular polydiallyldimethylammonium chloride.

11. Transfer paper according to any one of claim 9 or 10, the cationic agent or agents being present on said face in a quantity greater than or equal to 0.2 g/m.sup.2, particularly greater than or equal to 0.6 g/m.sup.2.

12. Transfer paper according to claim 1, having a Bendtsen air permeability greater than or equal to 100 ml/min.

13. Transfer paper according to claim 1, having a weight between 25 and 150 g/m.sup.2, in particular between 30 and 75 g/m.sup.2, with less than or equal to 50 g/m.sup.2 being preferred.

14. Manufacturing process for a transfer paper for sublimation printing, in particular according to claim 1, in which a surface treatment deposits on at least one face of a fibrous substrate one or more cationic agents, the quantity of the cationic agent or agents being greater than or equal to 8%, in dry weight, of the total dry weight of the compound or compounds furnished by the surface treatment on the fibrous substrate.

15. Manufacturing process according to claim 14 for a transfer paper for sublimation printing, in particular according to claim 1, in which a surface treatment deposits on at least one face of a fibrous substrate one or more cationic agents, the treated face of the transfer paper comprising the cationic agent or agents in a quantity greater than or equal to 0.2 g/m.sup.2, the transfer paper being free, on this face, from pigment, binder and formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, or the transfer paper comprising on said face one or more pigments and/or binders and/or formulation agents such as dispersant, wetting agent, thickener, insolubilizing agent, sizing agent, optical brightener or dye, in an individual, or better total, quantity less than or equal to 13 times, in g/m.sup.2, the quantity of cationic agent(s).

16. Manufacturing process for a transfer paper according to claim 14, in which the fibrous substrate is manufactured and the surface treatment applied in-line or off-line.

17. Manufacturing process for a transfer paper according to claim 14, in which the surface treatment deposits a composition comprising the cationic agent or agents on said face of the fibrous substrate.

18. Manufacturing process for a transfer paper according to the preceding claim, the quantity of the composition deposited on the face of the fibrous substrate being between 0.2 and 15 g/m.sup.2 by dry weight, preferably between 0.5 and 8 g/m.sup.2.

19. Manufacturing process for a transfer paper according to claim 17, the surface treatment being applied using a size press, a film transfer press or a coating system, in particular a knife coating, air knife coating, crayon or curtain, or by engraved cylinder.

20. Printed transfer paper for sublimation printing, comprising a transfer paper according to claim 1 and at least one print on the face of the transfer paper comprising the cationic agent or agents.

21. Printing process for a transfer paper for sublimation printing, in which the face comprising the cationic agent or agents of a transfer paper according to claim 1 is printed with at least one ink, in particular by inkjet printing.

22. Process for decorating a support, wherein the printing on a transfer paper printed according to claim 21 is transferred to the support by sublimation.

Description

EXAMPLES

[0049] The compositions described in the table below are each deposited using a Meyer rod on one face of a fibrous substrate, the composition and characteristics of which are described below. The fibrous substrates treated with the compositions form transfer papers.

[0050] Base paper prior to coating

[0051] Fibrous composition: 30% softwood+70% mixed short fibres

[0052] Basis weight=60 g/m.sup.2

[0053] Cobb size 60 s=15 g/m.sup.2

[0054] Bendtsen porosity=1500 ml/min

[0055] Coating formulations: composition and deposition per the table below

[0056] The printing test is conducted on the paper with the help of a SAWGRASS SG400 printer and the transfer is performed in a press at 200 C. for one minute on a polyester fabric.

[0057] A black ink (SAWGRASS Sublijet black) is deposited on the face of the fibrous substrate treated with the composition. A black flat tint is thus obtained. The transfer papers treated with the ink form the imprinted transfer papers.

[0058] The optical density after transfer to the polyester fabric is measured using an X-rite 500 spectrodensitometer.

[0059] The parts are expressed as dry weights.

TABLE-US-00001 Example 1 Example 2 Example 3 Example 4 Example 5 Calcium carbonate (parts) 20 20 2080 0 0 Aluminium silicate (parts) 80 80 0 0 0 Polyvinyl alcohol (parts) 12 12 17 0 0 Cationic agent - type PolyDADMAC PolyDADMAC PolyDADMAC Polyepichlorhydrin dimethylamine Cationic agent - quantity (parts) 0 40 40 100 100 Dry deposition (g/m.sup.2) 1.36 2.66 1.93 2.3 1.8 Cationic agent dry weight (g/m.sup.2) 0 0.7 0.51 2.3 1.8 Optical density (black flat tint) 1.86 2.14 2.21 2.20 2.22

[0060] In example 3, 20+80 indicates that 20 parts of ground CaCO.sub.3 and 80 parts of PCC (precipitated calcium carbonate) are used.

[0061] The Bendtsen air permeability of examples 2 to 5 is greater than 100 ml/min.

[0062] Note that the transfer papers printed according to the invention in examples 2, 3, 4 and 5 have an optical density greater than the transfer paper printed according to comparative example 1, which is not according to the invention.