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Renewable polyester film having a low modulus and high tensile elongation
US8980964B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8980964-B2 |
| Application number | US-201213370900-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 10, 2012 |
| Priority date | Feb 10, 2012 |
| Publication date | Mar 17, 2015 |
| Grant date | Mar 17, 2015 |
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Abstract
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A film that is formed from a thermoplastic composition is provided. The thermoplastic composition contains a rigid renewable polyester and a polymeric toughening additive. The toughening additive can be dispersed as discrete physical domains within a continuous matrix of the renewable polyester. An increase in deformation force and elongational strain causes debonding to occur in the renewable polyester matrix at those areas located adjacent to the discrete domains. This can result in the formation of a plurality of voids adjacent to the discrete domains that can help to dissipate energy under load and increase tensile elongation. To even further increase the ability of the film to dissipate energy in this manner, the present inventors have discovered that an interphase modifier may be employed that reduces the degree of friction between the toughening additive and renewable polyester and thus reduces the stiffness (tensile modulus) of the film.
First claim
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What is claimed is: 1. A film comprising a thermoplastic composition, wherein the thermoplastic composition comprises: at least one rigid renewable polyester having a glass transition temperature of about 0° C. or more; from about 1 wt. % to about 30 wt. % of at least one polymeric toughening additive based on the weight of the renewable polyester; from about 0.5 wt. % to about 15 wt. % of at least one interphase modifier based on the weight of the renewable polyester, wherein…
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Frequently asked questions
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- What does patent US8980964B2 cover?
- A film that is formed from a thermoplastic composition is provided. The thermoplastic composition contains a rigid renewable polyester and a polymeric toughening additive. The toughening additive can be dispersed as discrete physical domains within a continuous matrix of the renewable polyester. An increase in deformation force and elongational strain causes debonding to occur in the renewable …
- Who is the assignee on this patent?
- Topolkaraev Vasily A, Mceneany Ryan J, Scholl Neil T, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification B32B27/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 17 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).