Biaxially stretched polyester film and method for producing same
US9688826B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Nov 8, 2013 |
| Grant date | Jun 27, 2017 |
| Priority date | — |
| Expiry date | May 6, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2467/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
It is provided that a biaxially stretched polyester film suitable for uses for which nylon films and other flexible films have conventionally been used and a method for producing the film. A biaxially stretched polyester film made of a polyester resin composition (A) containing not less than 60 mass % of polybutylene terephthalate and having yield stress in a MD of not more than 70 MPa, yield stress in a TD of not more than 70 MPa, rupture strength in the MD of not less than 160 MPa, rupture strength in the TD of not less than 160 MPa, and rupture elongation in the MD and TD of not less than 100%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.