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US 10,849,800 B2Granted
Film with reduced noise for use in an absorbent article
AssigneeKimberly-Clark Worldwide, Inc.
InventorsFeng Chen, Michael J. Faulks, Gregory J. Wideman
Life of this patent
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Abstract
A film for use in an absorbent article is provided. The film is formed from a polymer composition that contains an ethylene polymer and a 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 film may generate a relatively low degree of noise when physically deformed.
Claims27
An absorbent article comprising:
- a liquid permeable layer;
- a liquid-impermeable layer that contains a film;
- and an absorbent core positioned between the liquid permeable layer and the liquid-impermeable layer;
- the film having a thickness of from about 0.5 to about 80 micrometers, wherein the film is formed from a polymer composition comprising
- one or more ethylene polymers in an amount of 95 wt. % to about 99 wt. % of a total polymer content of the polymer composition, wherein the one or more ethylene polymers comprises
- a linear low-density polyethylene in an amount of from 75 wt. % to about 99 wt. % of the polymer composition,
- a polyolefin compatibilizer in an amount of from 0.5 wt. % to about 5 wt. % of the total polymer content of the polymer composition, and
- one or more nanofibers in an amount of from about 0.5 wt. % to about 20 wt. % of the polymer composition, wherein the nanofiller includes carbon black, carbon nanotubes, carbon nanofibers, nanoclays, metal particles, silica, alumina, or a combination thereof,
- wherein the film exhibits a noise level of about 45 decibels or less as determined at a frequency of 4,000 Hz, and
- wherein the film exhibits a peak elongation in the machine direction of 400% or more.
7 more elements
An absorbent article comprising:
- a liquid permeable layer;
- a liquid-impermeable layer that contains a film;
- and an absorbent core positioned between the liquid permeable layer and the liquid-impermeable layer;
- the film having a thickness of from about 0.5 to about 80 micrometers, wherein the film is formed from a polymer composition that includes
- two or more ethylene polymers in an amount of 95 wt. % to about 99 wt. % of a total polymer content of the polymer composition, wherein the two or more ethylene polymers comprises
- a high density polyethylene (HDPE) in an amount of from about 20 wt. % to about 80 wt. % based on the weight of the composition and
- a low-density ethylene polymer comprising a linear low-density polyethylene (LLDPE), a low density polyethylene (LDPE), or a mixture thereof wherein the low-density ethylene polymer is present in an amount of from about 20 wt. % to about 80 wt. % based on the weight of the composition,
- one or more polyolefin compatibilizers in an amount of from 0.5 wt. % to about 5 wt. % of the total polymer content of the polymer composition,
- one or more nanofillers in an amount of from about 0.5 wt. % to about 20 wt. % of the polymer composition, wherein the nanofiller includes carbon black, carbon nanotubes, carbon fibers, nanoclays, metal particles, silica, alumina, or combinations thereof,
- wherein the film exhibits a noise level of about 45 decibels or less as determined at a frequency of 4,000 Hz, and
- wherein the film exhibits a peak elongation in the machine direction of 400% or more.
8 more elements
Dependencies are inferred from the claim text.