Fluororesin film of high mechanical strength

The present invention relates to a fluororesin film having mechanical strength such as tensile break strength or tensile modulus remarkably improved as compared with conventional films. A fluororesin film, which has a dielectric constant of at most 5, and which has a tensile break strength of at lea...

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Bibliographic Details
Main Authors Higuchi, Yoshiaki, Jitsugiri, Yukio
Format Patent
LanguageEnglish
Published 28.01.2003
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Summary:The present invention relates to a fluororesin film having mechanical strength such as tensile break strength or tensile modulus remarkably improved as compared with conventional films. A fluororesin film, which has a dielectric constant of at most 5, and which has a tensile break strength of at least 40 MPa in each of MD direction and TD direction; a fluororesin film, wherein the ratio of the tensile break strength in each of MD and TD directions after stretching to the tensile break strength in each of MD and TD directions before stretching, is at least 1.5; and a fluororesin film, which has a tensile modulus of at least 3,000 MPa in each of MD and TD directions. The above-mentioned fluororesin films are obtained by using a method of biaxially stretching laminates of corresponding raw fabric films and readily stretchable films.