Absorbent article with three-dimensional hot-melt bonded laminate

Patent metadata

Field	Value
Publication number	US-12208170-B2
Application number	US-202418587033-A
Country	US
Kind code	B2
Filing date	Feb 26, 2024
Priority date	Apr 17, 2019
Publication date	Jan 28, 2025
Grant date	Jan 28, 2025

Abstract

An absorbent article such as a baby diaper comprising a three-dimensional laminate 30 having a first layer 1 intermittently bonded to a second layer 2 by a heterophase polymer. The topsheet comprises three-dimensional protrusions 9 in the first layer 1 which are not bonded to the second layer 2 . The heterophase polymer has an enthalpy of fusion of at least 10 J/g. The laminate may be used on the wearer-facing side of the article as topsheet 24 and/or on the garment-facing side as part of the backsheet 26 . The first layer may comprise natural fibers.

First claim

What is claimed is:

1. An absorbent article having a wearer-facing side and an opposite garment-facing side, the article comprising a three-dimensional laminate, wherein the three-dimensional laminate comprises a first layer and a second layer;
wherein the first layer is intermittently bonded to the second layer by a hot-melt adhesive so that the first layer comprises a plurality of protrusions not bonded to the second layer;
wherein the three-dimensional laminate is configured to be liquid-permeable; and
wherein the three-dimensional laminate is disposed on the wearer-facing side of the absorbent article; and
wherein the hot-melt adhesive comprises a heterophase polymer having an enthalpy of fusion of at least 10 J/g, as measured according to the Enthalpy of Fusion Measurement Method.

2. The absorbent article of claim 1 , wherein the heterophase polymer has an enthalpy of fusion of from about 15 J/g to about 40 J/g, as measured according to the Enthalpy of Fusion Measurement Method.

3. The absorbent article of claim 1 , wherein the hot-melt adhesive has a storage modulus higher than 0.3×10 6 Pa at 37° C., as measured according to the Oscillatory Rheometry Test Method.

4. The absorbent article of claim 1 , wherein the heterophase polymer comprises a propylene-ethylene copolymer.

5. The absorbent article of claim 1 , wherein the first layer is a nonwoven layer and comprises from about 15% and up to 100% of natural fibers, by weight of the first layer.

6. The absorbent article of claim 5 , wherein the natural fibers are cotton fibers.

7. The absorbent article of claim 1 , wherein the hot-melt adhesive is disposed in a discontinuous application pattern between the first layer and the second layer.

8. The absorbent article of claim 1 , wherein the second layer is a nonwoven comprising synthetic fibers.

9. The absorbent article of claim 8 , wherein the second layer is selected from an air-through bonded carded nonwoven or a nonwoven comprising a meltblown layer.

10. The absorbent article of claim 1 , wherein the three-dimensional laminate has a Dry Peel Force higher than 0.15N/50.8 mm, as measured according to the Peel Force Measurement Method.

11. The absorbent article of claim 1 , wherein the three-dimensional laminate has a Dry/Wet Peel Force Loss of less than 50%, as measured according to the Peel Force Measurement Method.

12. The absorbent article of claim 1 , wherein the three-dimensional laminate has a Fresh/Aged Peel Force Loss of less than 25%, as measured according to the Peel Force Measurement Method.

13. The absorbent article of claim 1 , wherein the hot-melt adhesive is free of styrene block copolymers.

14. An absorbent article comprising a laminate disposed on a wearer-facing side of the article,
wherein the laminate comprises a first layer and a second layer;
wherein the first layer is intermittently bonded to the second layer by a hot-melt adhesive so that the first layer comprises a plurality of protrusions not bonded to the second layer;
wherein the laminate is configured to be liquid-permeable;
wherein the laminate forms a liquid-permeable topsheet, such that the laminate is configured to be in contact with a wearer's skin during use of the absorbent article;
wherein the hot-melt adhesive comprises a heterophase polymer; and
wherein the hot-melt adhesive has a storage modulus higher than 0.3×10 6 Pa at 37° C., as measured according to the Oscillatory Rheometry Test Method.

15. The absorbent article of claim 14 , wherein the heterophase polymer has an enthalpy of fusion of from about 15 J/g to about 40 J/g, as measured according to the Enthalpy of Fusion Measurement Method.

16. The absorbent article of claim 14 , wherein the heterophase polymer comprises a propylene-ethylene copolymer.

17. The absorbent article of claim 14 , wherein the first layer is a nonwoven layer and comprises from about 15% and up to 100% of natural fibers, by weight of the first layer.

Assignees

• Procter & Gamble

Inventors

• Lindner Torsten
• Erdem Gueltekin

Classifications

• D04H1/593

  to layered webs · CPC title

• D04H1/58

  by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives (in combination with needling D04H1/488) · CPC title

• D04H1/5405

  at spaced points or locations · CPC title

• D04H1/4266

  Natural fibres not provided for in group D04H1/425 · CPC title

• D04H1/02

  Cotton wool; Wadding · CPC title