Digital printing ink

Patent metadata

Field	Value
Publication number	US-2020216699-A1
Application number	US-202016820729-A
Country	US
Kind code	A1
Filing date	Mar 17, 2020
Priority date	Oct 17, 2018
Publication date	Jul 9, 2020
Grant date	—

Abstract

A digital printing ink including chitosan, a surfactant, and a balance of a solvent is provided. The chitosan has a weight-average molecular weight of 200,000 to 300,000. The surfactant includes a polyglycol, an ethylene oxide, or a combination thereof. The digital printing ink has a viscosity of 2 cps to 12 cps, a surface tension of 28 dyne/cm to 40 dyne/cm, and a pH value of 6 to 8. A content of the chitosan is 5 wt. % to 10 wt. %, and a content of the surfactant is 2 wt. % to 5 wt. %, based on the total weight of the digital printing ink.

First claim

What is claimed is:

1 . A digital printing ink for forming an inkjet pattern on a fabric, the digital printing ink comprising:
chitosan having a weight-average molecular weight of 200,000 to 300,000; a surfactant comprising polyglycol, ethylene oxide, or a combination thereof; and a balance of a solvent, wherein the digital printing ink has a viscosity of 2 cps to 12 cps, a surface tension of 28 dyne/cm to 40 dyne/cm, and a pH value of 6 to 8, and wherein a content of the chitosan is 5 wt. % to 10 wt. %, and a content of the surfactant is 2 wt. % to 5 wt. %, based on the total weight of the digital printing ink.

2 . The digital printing ink of claim 1 , further comprising a pH regulator, wherein the pH regulator comprises triethanolamine, a phosphate solution, or a combination thereof, and a content of the pH regulator is 0.1 wt. % to 0.4 wt. %, based on the total weight of the digital printing ink.

3 . The digital printing ink of claim 1 , further comprising a coupling agent, wherein the coupling agent comprises a polymer having an ethylene oxide side chain, and a content of the coupling agent is 0.01 wt. % to 0.06 wt. %, based on the total weight of the digital printing ink.

4 . The digital printing ink of claim 1 , further comprising a humectant, wherein the humectant comprises glycerin, and a content of the humectant is 4 wt. % to 6 wt. %, based on the total weight of the digital printing ink.

5 . The digital printing ink of claim 1 , further comprising a cosolvent, wherein the cosolvent comprises propylene glycol methyl ether, and a content of the cosolvent is 4 wt. % to 6 wt. %, based on the total weight of the digital printing ink.

6 . The digital printing ink of claim 1 , wherein the solvent comprises deionized water.

7 . The digital printing ink of claim 1 , wherein the polyglycol has a weight-average molecular weight of 400 to 600.

Assignees

• Taiwan Textile Res Inst

Inventors

• Lin Chia-Yi
• Lin Po-Chuen

Classifications

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title

• D06P3/24

  Polyamides; Polyurethanes · CPC title

• D06P1/645

  Aliphatic, araliphatic or cycloaliphatic compounds containing amino groups · CPC title

• C09D11/104

  Polyesters · CPC title

• D06P1/5271

  Polyesters; Polycarbonates; Alkyd resins · CPC title