# US 10,869,790 B2 · Absorbent article package with reduced noise

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- Number: US 10,869,790 B2
- Document ID: US10869790B2
- Status: Granted
- Kind: B2
- Application number: 14/914,266
- Filed: 2015-01-30
- Published: 2017-11-09
- Granted: 2020-12-22
- Earliest claimed: 2015-01-30
- Assignees: Kimberly-Clark Worldwide, Inc.
- Applicants: Kimberly-Clark Worldwide, Inc.
- Inventors: Feng Chen; Michael J. Faulks; Mark M. Mleziva; Gregory J. Wideman
- Web page: https://patentgrep.com/patent/US10869790B2

## CPC

- A61F 13/5514: {each item packaged single}
- C08L 23/06: Polyethylene
- A61F 13/551: Packaging before or after use {(general packaging of absorbent pads B65D85/00)}
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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

### Claim 3 (depends on 2)

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

### Claim 4 (depends on 1)

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

### Claim 5 (depends on 1)

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

### Claim 6 (depends on 1)

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

### Claim 7 (depends on 1)

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

### Claim 8 (depends on 7)

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

### Claim 9 (depends on 1)

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

### Claim 10 (depends on 9)

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

### Claim 11 (depends on 1)

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

### Claim 12 (depends on 11)

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

### Claim 13 (depends on 1)

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.

### Claim 14 (depends on 1)

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

### Claim 15 (depends on 1)

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

### Claim 16 (depends on 1)

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.

### Claim 17 (depends on 1)

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

### Claim 18 (depends on 1)

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.

### Claim 19 (depends on 1)

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.

### Claim 20 (depends on 1)

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.

### Claim 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.

### Claim 22 (depends on 21)

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.