Title:
BIAXIALLY ORIENTED POLYESTER FILM AND ITS PRODUCTION METHOD
Document Type and Number:
Japanese Patent JP2003327721
Kind Code:
A
Abstract:
To provide a high-quality polyester film by improving the processibility by decreasing the occurrence of wrinkles or slackening in the film formation step of a film which comprises polyethylene terephthalate and a thermoplastic resin other than a polyester and has a high dimensional stability.
The biaxially oriented polyester film essentially contains a polyester mainly comprising ethylene terephthalate units and a thermoplastic resin other than a polyester, and the maximum slope of storage modulus E' at 150°C-210°C in the longitudinal direction of the film, obtained by a dynamic viscoelasticity measurement (frequency: 10 Hz), is 5-20 (MPa/°C).
Inventors:
KUBOTA HIROSHI
HORIE MASAHITO
TSUNEKAWA TETSUYA
HORIE MASAHITO
TSUNEKAWA TETSUYA
Application Number:
JP2002140995A
Publication Date:
November 19, 2003
Filing Date:
May 16, 2002
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C08J5/18; B29C55/12; C08L67/02; C08L79/08; C08L101/00; B29K67/00; B29L7/00; (IPC1-7): C08J5/18; B29C55/12; C08L67/02; C08L79/08; C08L101/00
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