Absorbent material

Patent metadata

Field	Value
Publication number	US-11214902-B2
Application number	US-201515777373-A
Country	US
Kind code	B2
Filing date	Nov 20, 2015
Priority date	Nov 20, 2015
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

An absorbent material, such as a non-woven web or a tissue paper, includes continuous filaments and short fibers, the short fibers including natural and/or synthetic fibers or staple fibers. The absorbent material exhibits an absorbency speed of equal to or less than 2 s and a weight loss when washed of equal to or less than 5%. The absorbent material can be incorporated into a wipe.

First claim

The invention claimed is:

1. An absorbent material, comprising continuous filaments and short fibers, the short fibers comprising pulp fibers and/or staple fibers, and a wet strength agent in an amount of 0.2-1.0 wt % of the absorbent material, wherein the continuous filaments have a diameter less than or equal to 15 μm and the pulp fibers are present in an amount of at least 5 wt % of the absorbent material,
wherein the absorbent material exhibits an absorbency speed when measured with ISO 12625-8, of equal to or less than 2 s and a weight loss when washed in the Washing Machine Test, of equal to or less than 5%, and
wherein the absorbent material is hydroentangled.

2. The absorbent material according to claim 1 , wherein the absorbent material further exhibits an absorbency of at least 5 g/g.

3. The absorbent material according to claim 1 , wherein the pulp fibers are present in an amount of at least 30 wt % of the absorbent material.

4. The absorbent material according to claim 1 , wherein the staple fibers have a length of 5-20 mm.

5. The absorbent material according to claim 1 , wherein the staple fibers are, at least one of, polylactic fibers, regenerated cellulose fibers, pulp fibers, cotton fibers, hemp fibers, flax fibers, polypropylene fibers, polyester fibers or bicomponent fibers.

6. The absorbent material according to claim 1 , wherein the short fibers are, at least one of, pulp fibers, cotton fibers, hemp fibers, or flax fibers.

7. The absorbent material according to claim 1 , wherein continuous filaments are, at least one of, polylactic acid, polypropylene or polyethylene terephthalate filaments.

8. The absorbent material according to claim 1 , wherein the absorbent material is embossed.

9. A wipe comprising the absorbent material according to claim 1 .

10. The absorbent material according to claim 1 , wherein the Washing Machine Test includes providing a plurality of samples each having about 0.27 m 2 of the absorbent material, weighing each of the samples, washing each of the samples together for a wash cycle in a washing machine, separating and drying the samples after the wash cycle, and re-weighing each of the samples after drying the samples to allow for a calculation of a loss of material caused during the washing, wherein the weight loss for the samples is less than or equal to 5% based on the material composition and construction of the absorbent material.

Assignees

• Essity Hygiene & Health Ab

Inventors

• Bogren Maria
• Fingal Lars
• Nihlstrand Anna

Classifications

• D21H13/14

  Polyalkenes, e.g. polystyrene {polyethylene} · CPC title

• D21H27/02

  Patterned paper (patterned coatings D21H19/66; embossing B31F1/07; prepared on the paper-making machines D21F11/00) · CPC title

• D21H13/24

  Polyesters · CPC title

• D21H15/10

  Composite fibres · CPC title

• D04H5/06

  strengthened or consolidated by welding-together thermoplastic fibres, filaments, or yarns · CPC title