Absorbent article package with reduced noise

Patent metadata

Field	Value
Publication number	US-10869790-B2
Application number	US-201514914266-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Jan 30, 2015
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A package that contains a wrapper material that defines an interior cavity within which an absorbent article is removably positioned is provided. The wrapper material is formed from a film that includes a polymer composition containing at least one ethylene polymer and at least one nanofiller. The present inventors have discovered that through selective control over the particular type and concentration of these components, as well as the manner in which it is formed, the resulting package may generate a relatively low degree of noise when physically deformed.

First claim

What is claimed is:

1. A package comprising a wrapper material that defines an interior cavity and an absorbent article removably positioned within the cavity, wherein the wrapper material is formed from a film having a thickness of from about 0.5 to about 80 micrometers, wherein the film contains a polymer composition that includes
one or more ethylene polymers in an amount of from about 75 wt. % to about 99 wt. % of the polymer composition, wherein the one or more ethylene polymers include one or more low density ethylene polymers and one or more high density ethylene polymers, wherein the low density polymers comprise from about 5 wt. % to about 90 wt. % of the polymer composition and the high density ethylene polymers comprise from about 5 wt. % to about 90 wt. % of the polymer composition and
one or more nanofillers in an amount of from about 0.5 wt. % to about 20 wt. % of the polymer composition wherein the nanofillers have an average cross-sectional dimension of from about 0.2 to about 100 nanometers.

2. The package of claim 1 , wherein the ethylene polymer is a copolymer of ethylene and an α-olefin.

3. The package of claim 2 , wherein the ethylene polymer is linear low density polyethylene.

4. The package of claim 1 , wherein the polymer composition includes linear low density polyethylene, low density polyethylene, high density polyethylene, or a combination thereof.

5. The package of claim 1 , wherein the nanofiller has an average cross-sectional dimension of from about 0.5 to about 50 nanometers.

6. The package of claim 1 , wherein the nanofiller includes carbon black, carbon nanotubes, carbon nanofibers, nanoclays, metal particles, silica, alumina, or a combination thereof.

7. The package of claim 1 , wherein the nanofiller includes a nanoclay, wherein the nanoclay includes a phyllosilicate.

8. The package of claim 7 , wherein the phyllosilicate includes a montmorillonite or a salt thereof.

9. The package of claim 1 , wherein the nanofiller includes an organic surface treatment.

10. The package of claim 9 , wherein the organic surface treatment includes a quaternary onium.

11. The package of claim 1 , wherein the polymer composition further comprises a polyolefin compatibilizer that contains an olefin component and a polar component.

12. The package of claim 11 , wherein the polar component of the compatibilizer includes maleic anhydride.

13. The package of claim 1 , wherein the film is multi-layered and contains a base layer and/or skin layer formed from the polymer composition.

14. The package of claim 1 , wherein a surface of the film is embossed.

15. The package of claim 1 , wherein the wrapper material consists of the film.

16. The package of claim 1 , wherein the absorbent article comprises a liquid permeable layer, a liquid-impermeable layer, and an absorbent core positioned between the liquid permeable layer and the liquid-impermeable layer.

17. The package of claim 1 , wherein the absorbent article is a feminine care product.

18. The package of claim 1 wherein the low density polymers comprise from about 10 wt. % to about 80 wt. % of the polymer composition and the high density ethylene polymers comprise from about 10 wt. % to about 80 wt. % of the polymer composition.

19. The package of claim 1 , wherein the one or more ethylene polymers include one or more low density ethylene polymers and wherein the low density ethylene polymers comprise about 80 wt. % or more of the polymers employed in the polymer composition.

20. The package of claim 1 , wherein the film exhibits a Young's modulus in the machine direction and/or cross-machine direction of from about 50 to about 500 MPa.

21. A package comprising a wrapper material that defines an interior cavity and an absorbent article removably positioned within the cavity, wherein the wrapper material is formed from a film having a thickness of from about 0.5 to about 80 micrometers, wherein the film contains a polymer composition that includes
one or more ethylene polymers in an amount of from about 75 wt. % to about 99 wt. % of the polymer composition, wherein the one or more ethylene polymers include one or more low density ethylene polymers and one or more high density ethylene polymers, wherein the low density polymers comprise from about 5 wt. % to about 90 wt. % of the polymer composition and the high density ethylene polymers comprise from about 5 wt. % to about 90 wt. % of the polymer composition and
one or more nanofillers in an amount of from about 0.5 wt. % to about 20 wt. % of the polymer composition wherein the nanofillers include a nanoclay and wherein the nanofillers have an average cross-sectional dimension of from about 0.5 to about 50 nanometers and are in the form of platelets having an aspect ratio of from about 20 to about 1,000.

22. The package of claim 21 , wherein the film exhibits a Young's modulus in the machine direction and/or cross-machine direction of from about 50 to about 500 MPa.

Assignees

• Kimberly Clark Co

Inventors

• Chen Feng
• Faulks Michael J
• Mleziva Mark M
• Wideman Gregory J

Classifications

• A61F13/551

  Packaging before or after use {(general packaging of absorbent pads B65D85/00)} · CPC title

• C08L23/08

  Copolymers of ethene (C08L23/16 takes precedence) · CPC title

• A61F13/5514 Primary

  each item packaged single · CPC title

• C08L23/06

  Polyethylene · CPC title

• A61L15/24

  Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof {(A61L15/225 takes precedence)} · CPC title