Inkjet printing on dyed synthetic fabrics

Patent metadata

Field	Value
Publication number	US-11530330-B2
Application number	US-201816480682-A
Country	US
Kind code	B2
Filing date	Jan 23, 2018
Priority date	Jan 25, 2017
Publication date	Dec 20, 2022
Grant date	Dec 20, 2022

Abstract

An inkset and a process for direct inkjet printing color images on dyed synthetic fabrics is provided herewith, based on forming an image on the fabric in the form of a well-adhered crosslinked film, using an acid-immobilized ink composition, while avoiding dye migration from the fabric to the image in the process of curing the film, using a low-temperature curing crosslinking agent and curing the image at a temperature lower than 120±5° C.

First claim

What is claimed is:

1. A process for digital inkjet printing color images directly on a dyed substrate, the process comprising:
digitally printing by an inkjet printhead directly on at least a portion of the substrate an immobilizing composition that comprises an acid and an aqueous carrier, and formulated to exhibit an acidic pH lower than 7;
digitally printing by an inkjet printhead directly on said portion of the substrate an ink composition that comprises a dispersed pigment, a low-temperature curing self-crosslinking resin and an aqueous carrier, and formulated to exhibit an alkaline pH higher than 7; and
curing the printed substrate to thereby initiate a crosslinking reaction and form the image in the form of a film on the surface of the substrate, wherein:
the dyed substrate is a fabric made of synthetic fibers;
the dyed substrate is dyed with a dye that migrate at a temperature higher than 120° C.;
said low-temperature curing self-crosslinking resin is a pH-sensitive low-temperature curing self-crosslinking resin;
said low-temperature curing self-crosslinking resin initiates crosslinking reaction at a temperature that ranges from 90° C. to 110° C.;
said low-temperature curing self-crosslinking resin is a polycarbodiimides; and
said curing is effected by heating the printed substrate at a temperature lower than 110±5° C. for 10-12 minutes followed by 3 days at room temperature.

2. The process of claim 1 , further comprising, subsequent to said heating, maintaining said substrate having the printed thereon at a temperature lower than 100° C. for a time period that ranges from 1 hour to 1 week to thereby effect propagation of said crosslinking reaction.

3. A dyed substrate having an image printed thereon in a form of a cured film, wherein the image is afforded by the process of claim 1 .

4. An image in a form of a cured film applied on a dyed substrate, wherein the image is afforded by the process of claim 1 .

Assignees

• Kornit Digital Ltd

Inventors

• Iraqi Muhammad
• Mozel Jacob

Classifications

• C09D11/32 Primary

  characterised by colouring agents · CPC title

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title

• B41M5/0017

  Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying · CPC title

• D06P5/30

  Ink jet printing · CPC title

• B41J3/4078

  Printing on textile · CPC title