Textile printing

Patent metadata

Field	Value
Publication number	US-11066782-B2
Application number	US-201616079960-A
Country	US
Kind code	B2
Filing date	Jul 21, 2016
Priority date	Jul 21, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Herein is described a method of printing on a textile substrate. The method may comprise: a. applying a primer comprising a cross-linkable primer resin onto a surface of the textile substrate to form a primer layer; b. electrophotographically printing onto the primer layer an electrostatic ink composition comprising a cross-linkable thermoplastic resin to form a printed layer; c. applying a cross-linking composition comprising a cross-linking agent to the printed layer, wherein i. the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer; and/or ii. the cross-linking agent is a non-isocyanate agent; and d. activating the cross-linking agent. Printed textiles are also described.

First claim

The invention claimed is:

1. A method of printing on a textile substrate, the method comprising:
a. applying a primer comprising a cross-linkable primer resin onto a surface of the textile substrate to form a primer layer;
b. electrophotographically printing onto the primer layer an electrostatic ink composition comprising a cross-linkable thermoplastic resin to form a printed layer;
c. applying a cross-linking composition comprising a cross-linking agent to the printed layer, wherein
i. the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer; and/or
ii. the cross-linking agent is a non-isocyanate agent; and

d. activating the cross-linking agent.

2. The method according to claim 1 , wherein the cross-linkable primer resin comprises a carboxylic functional group, an amine functional group or a polyol functional group.

3. The method according to claim 1 , wherein the cross-linkable thermoplastic resin comprises alkylene acrylic or methacrylic acid resins, polyurethane resins, polyethylene imine resins, polyamide resins, polyvinyl alcohol or combinations thereof and/or wherein the cross-linkable thermoplastic resin comprises a polymer having acidic side groups.

4. The method according to claim 1 , wherein the electrostatic ink composition is a liquid electrostatic ink composition.

5. The method according to claim 1 , wherein the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer and the cross-linking agent is an epoxy-based cross-linking agent, an aziridine-based cross-linking agent, an isocyanate-based cross-linking agent, or a carbodiimide-based cross-linking agent.

6. The method according to claim 1 , wherein the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer and the cross-linking composition does not contain any cross-linkable resin.

7. The method according to claim 1 , wherein the cross-linking agent penetrates into at least the electrostatic ink composition and the primer layer and the cross-linking composition comprises 0.5 wt % to 30 wt % cross-linking agent by total weight of the cross-linking composition, the remaining wt % being a carrier solvent.

8. The method according to claim 1 , wherein the textile substrate comprises a network of natural or synthetic fibres that may or may not be woven or knit.

9. The method according to claim 1 , wherein an over print varnish is or is not applied and wherein if an over print varnish is applied, the over print varnish is applied after the cross-linking composition is applied and it may be applied before or after the activation of the cross-linking agent.

10. The method according to claim 1 , wherein the cross-linking agent is a non-isocyanate agent and the cross-linking composition comprises the non-isocyanate agent and an over print varnish resin.

11. The method according to claim 10 , wherein the over print varnish resin comprises an acrylate resin, a polyurethane resin or a nitrocellulose resin.

12. The method according to claim 10 , wherein the non-isocyanate agent comprises an epoxy-based cross-linking agent, an aziridine-based cross-linking agent, or a carbodiimide-based cross-linking agent.

Assignees

• Hp Indigo Bv

Inventors

• Or-Chen Dafna
• Joseph Eyal
• Tzomik Inna
• Salant Asaf
• Tulchinski Dani

Classifications

• D06P5/001 Primary

  Special chemical aspects of printing textile materials · CPC title

• D06P1/58

  together with other synthetic macromolecular substances · CPC title

• D06P1/6424

  Compounds containing isocyanate or isothiocyanate groups · CPC title

• D06P1/6493

  Carbodiimides (=N=C=N=) · CPC title

• D06P5/20

  Physical treatments affecting dyeing, e.g. ultrasonic or electric · CPC title