Manufacturing method of carboxymethyl cellulose nonwoven fabric and use of carboxymethyl cellulose nonwoven fabric manufactured thereby

Patent metadata

Field	Value
Publication number	US-9481963-B2
Application number	US-201314348733-A
Country	US
Kind code	B2
Filing date	Oct 23, 2013
Priority date	Dec 10, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

The present invention relates to a manufacturing method of a carboxymethyl cellulose nonwoven fabric which includes the carboxymethylation of cellulose fibers and the subsequent paper-making process to prepare a carboxymethyl cellulose nonwoven fabric. Comparing with the conventional method involving carboxymethylation of a nonwoven fabric, the method of the present invention has convenience and easiness of the process and thus enables production on a large scale. Further, the carboxymethyl cellulose nonwoven fabric manufactured by the present invention is susceptible to gelation upon contact with body fluids or water and thus useful as a medical nonwoven fabric or a mask pack.

First claim

The invention claimed is:

1. A manufacturing method of a wet-laid carboxymethyl cellulose nonwoven fabric having a pore size of 1 to 500 μm, comprising the steps of:
treating cellulose fibers chemically to prepare carboxymethyl cellulose fibers;
disentangling and mixing the carboxymethyl cellulose fibers in a paper-making solution comprising an alcohol solvent, wherein the alcohol solvent is selected from the group consisting of ethanol, methanol, propanol, and mixtures thereof; and
eliminating the alcohol solvent.

2. The method as claimed in claim 1 , further comprising the step of performing a pressing process using calendering after eliminating the solvent.

3. The method as claimed in claim 1 , wherein the cellulose fibers are selected from the group consisting of viscos rayon fiber, cotton fiber, and Lyocell fiber.

4. The method as claimed in claim 1 , wherein the carboxymethyl cellulose fibers have a length of 0.1 to 10 mm.

5. A medical nonwoven fabric for a water-absorption material comprising:
a porous wet-laid carboxymethyl cellulose nonwoven fabric having a pore size of 1 to 500 μm, wherein the pore size can induce capillary actions to control the rate of gelation such that the wet-laid carboxymethyl cellulose nonwoven fabric is entirely gelated upon contact with body fluid.

6. The medical nonwoven fabric as claimed in claim 5 , wherein the water-absorption material is selected from the group consisting of an anti-adhesion barrier, a wound dressing, and a hemostatic dressing.

7. The medical nonwoven fabric as claimed in claim 5 , wherein the carboxymethyl cellulose nonwoven fabric is dyed with a biocompatible dye or pigment.

8. The medical nonwoven fabric as claimed in claim 5 , wherein the carboxymethyl cellulose nonwoven fabric is further coated with an antibacterial material.

9. A mask pack comprising:
a porous wet-laid carboxymethyl cellulose nonwoven fabric having a pore size of 1 to 500 μm, wherein the pore size can induce capillary actions to control the rate of gelation such that the wet-laid carboxylmethyl cellulose nonwoven fabric is entirely gelated upon contact with body fluid.

Assignees

• Im Jung Nam
• Doh Song Jun
• Lim Dae Young
• Lee Ji Yun
• Korea Ind Tech Inst

Inventors

• Im Jung Nam
• Doh Song Jun
• Lim Dae Young
• Lee Ji Yun

Classifications

• D21H13/04

  Cellulose ethers · CPC title

• D21H11/20

  Chemically or biochemically modified fibres · CPC title

• D21H5/141 Primary

  of fibrous cellulose derivatives · CPC title

• A61L15/28

  Polysaccharides or their derivatives {(A61L15/225 takes precedence)} · CPC title

• D21H27/007 Primary

  relating to absorbency, e.g. amount or rate of water absorption, optionally in combination with other parameters relating to physical or mechanical properties · CPC title