Method for producing a flushable hydroentangled moist wipe or hygiene tissue

Patent metadata

Field	Value
Publication number	US-9822487-B2
Application number	US-201415302214-A
Country	US
Kind code	B2
Filing date	Apr 8, 2014
Priority date	Apr 8, 2014
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A method for producing a flushable hydroentangled moist wipe or hygiene tissue includes the steps of: dry-, wet-, or foam-forming a fibrous web on a moving support, hydroentangling said fibrous web in a hydroentangling station to form a hydroentangled nonwoven web. The moving support includes a plurality of protruding elongated elements protruding above the surface of the moving support. The protruding elements will produce weakenings in the hydroentangled web.

First claim

The invention claimed is:

1. A method for producing a flushable wipe or hygiene tissue comprising a hydraulically entangled nonwoven material impregnated with a wetting composition, said method comprising:
dry-, wet-, or foam-forming a fibrous web on a moving support; and
hydroentangled said fibrous web in a hydroentangling station to form a hydroentangled nonwoven web,
wherein said moving support is a hydroentangling fabric, which comprises a plurality of protruding elongated elements protruding above the plane of the moving support, and wherein said protruding elements produces weakenings in the hydroentangled web during hydroentangling.

2. The method according to claim 1 , wherein said protruding elongated elements have a height protruding above the plane of the moving support of at least 0.5 times the thickness of the hydroentangled nonwoven web in dry condition and not more than 1.0 time the thickness of the hydroentangled nonwoven web in dry condition.

3. The method according to claim 1 , wherein said protruding elongated elements have a width between 0.5 and 2 mm.

4. The method according to claim 1 , wherein said protruding elongated elements have a length between 3 and 30 mm.

5. The method according to claim 1 , wherein said protruding elongated elements have a length/width relationship between 1.5 and 60.

6. The method according to claim 1 , wherein said protruding elongated elements have their length direction oriented at an angle of ±45° with respect to the machine direction of the moving support.

7. The method according to claim 6 , wherein said protruding elongated elements have a length direction oriented in the machine direction.

8. The method according to claim 1 , wherein said protruding elongated elements are arranged in a plurality of rows, wherein said rows extend at an angle of 45° with respect to the machine direction of the moving support.

9. The method according to claim 8 , wherein said rows extend in the machine direction.

10. The method according to claim 8 , wherein a distance between adjacent protruding elongated elements in said rows is between 10 and 45 mm.

11. The method according to claim 8 , wherein a distance between adjacent rows between 5 and 40 mm.

12. The method according to claim 8 , wherein the protruding elongated elements in a row are oriented with their length direction aligned.

13. The method according to claim 1 , wherein said protruding elongated elements have a straight configuration.

Assignees

• Sca Hygiene Prod Ab

Inventors

• Ahoniemi Hannu
• Fingal Lars
• Strålin Anders

Classifications

• D21H13/08 Primary

  from regenerated cellulose · CPC title

• D04H1/495

  for formation of patterns, e.g. drilling or rearrangement · CPC title

• D04H18/04

  with water jets · CPC title

• D21H27/00

  Special paper not otherwise provided for, e.g. made by multi-step processes · CPC title

• D04H1/492

  by fluid jet (D04H1/49 takes precedence) · CPC title