Polyolefin Material having a Low Density
AssigneeKimberly-Clark Worldwide, Inc.
InventorsVasily A. Topolkaraev, Ryan J. McEneany, Antonio J. Carrillo
Life of this patent
Estimating the term…
Abstract
A polyolefin material that is formed by solid state drawing of a thermoplastic composition containing a continuous phase that includes a polyolefin matrix polymer and nanoinclusion additive is provided. The nanoinclusion additive is dispersed within the continuous phase as discrete nano-scale phase domains. When drawn, the nano-scale phase domains are able to interact with the matrix in a unique manner to create a network of nanopores.
Claims38
1-41. (canceled)
A polyolefin material that is formed by drawing of a thermoplastic composition, wherein the thermoplastic composition contains a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains, wherein a porous network is defined in the composition that includes a plurality of nanopores having an average cross-sectional dimension of about 800 nanometers or less, the composition having a density of about 0.90 g/cm3 or less.
An absorbent article comprising a polyolefin material that is formed by drawing of a thermoplastic composition, wherein the thermoplastic composition contains a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains, wherein a porous network is defined in the composition that includes a plurality of nanopores having an average cross-sectional dimension of about 800 nanometers or less, the composition having a density of about 0.90 g/cm3 or less, wherein the absorbent article includes a substantially liquid-impermeable layer, liquid-permeable layer, and an absorbent core.
A method for forming a polyolefin material, the method comprising:
- forming a thermoplastic composition that contains a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains;
- and
- solid state drawing the thermoplastic composition, wherein a porous network is defined in the composition that includes a plurality of nanopores having an average cross-sectional dimension of about 800 nanometers or less, the composition having a density of about 0.90 g/cm3 or less.
Dependencies are inferred from the claim text.