Dispersible moist wipe and method of making

Patent metadata

Field	Value
Publication number	US-10538879-B2
Application number	US-201515579655-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Jun 29, 2015
Publication date	Jan 21, 2020
Grant date	Jan 21, 2020

Abstract

A dispersible moist wipe includes regenerated cellulose fibers in an amount equal to or less than 20 percent by weight and natural cellulose fibers in an amount equal to or greater than 80 percent by weight. At least 50 percent of the natural cellulose fibers are fibrillated. The regenerated cellulose fibers and the natural cellulose fibers are hydroentangled such that the web has a wet CD tensile strength of at least 200 grams per inch. A method of making a dispersible nonwoven sheet includes dispersing natural cellulose fibers and regenerated cellulose fibers in a liquid medium to form a liquid suspension and depositing the liquid suspension over a forming surface to form a nonwoven web. The natural cellulose fibers and regenerated cellulose fibers of the web are hydroentangled using a plurality of hydroentangling jets.

First claim

What is claimed is:

1. A dispersible moist wipe comprising regenerated cellulose fibers in an amount equal to or less than 20 percent by weight and natural cellulose fibers in an amount equal to or greater than 80 percent by weight, at least 60 percent of the natural cellulose fibers being fibrillated, the regenerated cellulose fibers and the natural cellulose fibers being hydroentangled into a web such that the web has a wet CD tensile strength of at least 200 grams per inch.

2. The dispersible moist wipe set forth in claim 1 wherein the regenerated cellulose fibers is in an amount equal to or less than 10 percent by weight and the natural cellulose fibers is in an amount equal to or greater than 90 percent by weight.

3. The dispersible moist wipe set forth in claim 1 wherein 100 percent of the natural cellulose fibers are fibrillated.

4. The dispersible moist wipe set forth in claim 1 wherein the web comprises between 5 and 10 percent by weight regenerated cellulose fibers and between 90 and 95 percent natural cellulose fibers.

5. The dispersible moist wipe set forth in claim 1 wherein the web has a wet CD tensile strength of at least 250 grams per inch.

6. The dispersible moist wipe set forth in claim 5 wherein the web has a wet CD tensile strength of at least 300 grams per inch.

7. The dispersible moist wipe set forth in claim 1 wherein the natural cellulose fibers are softwood pulp.

8. The dispersible moist wipe set forth in claim 1 wherein the regenerated cellulose fibers have a length in the range of about 4 millimeters to about 15 millimeters.

9. The dispersible moist wipe set forth in claim 8 wherein the regenerated cellulose fibers have a length in the range of about 6 millimeters to about 12 millimeters.

10. The dispersible moist wipe set forth in claim 1 wherein the regenerated cellulose fibers have decitex between 0.7 g/10,000 m and 2 g/10,000 m.

11. The dispersible moist wipe set claim 10 wherein the regenerated cellulose fibers have decitex between 0.9 g/10,000 m and 1.1 g/10,000 m.

Assignees

• Kimberly Clark Co

Inventors

• Baker Joseph K
• Moline David A
• Ackroyd Colin
• Bresnahan Lynn P

Classifications

• D04H1/04

  from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres (felting apparatus D04H17/00) · CPC title

• D04H1/4258

  Regenerated cellulose series · CPC title

• D04H1/425

  Cellulose series · CPC title

• D21H13/08

  from regenerated cellulose · CPC title

• D21H11/14 Primary

  Secondary fibres (working-up waste paper D21C5/02) · CPC title