发明名称 |
PROCESS FOR PRODUCING ARTICLES FORMED FROM POLYLACTIC ACID AND ARTICLES MADE THEREFROM |
摘要 |
PLA polymers that can be expanded into microporous articles having a node and fibril microstructure are provided. The fibri!s contain PLA polymer chains oriented with the fibril axis. Additionally, the PLA polymers have an inherent viscosity greater than about 3.8 dL/g and a calculated molecular weight greater than about 150,000 g/mol. The PLA polymer article may be formed by bulk polymerization where the PLA bulk polymer is made into a preform that is subsequently expanded at temperatures above the glass transition temperature and below the melting point of the PLA polymer. In an alternate embodiment, a PLA polymer powder is lubricated, the lubricated polymer is subjected to pressure and compression to form a preform, and the preform is expanded to form a microporous article. Both the preform and the microporous article are formed at temperatures above the glass transition temperature and below the melting point of the PLA polymer. |
申请公布号 |
WO2016018965(A2) |
申请公布日期 |
2016.02.04 |
申请号 |
WO2015US42561 |
申请日期 |
2015.07.29 |
申请人 |
W. L. GORE & ASSOCIATES, INC. |
发明人 |
SBRIGLIA, GUY, A.;GORE, SCOTT, A. |
分类号 |
B29C55/04 |
主分类号 |
B29C55/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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