Fluororesin film having excellent transparency

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United States of America Patent

PATENT NO 9822225
APP PUB NO 20150252156A1
SERIAL NO

14431538

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Abstract

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The present invention aims to provide an ETFE film having excellent transparency and heat resistance and cost efficiency. The present invention relates to a film including a copolymer containing an ethylene unit, a tetrafluoroethylene unit, and a (fluoroalkyl)ethylene unit represented by Formula (1):

description='In-line Formulae' end='lead'CH2═CX—Rf  (1)description='In-line Formulae' end='tail'

wherein X represents H or F, and Rf represents a fluoroalkyl group having 2 or more carbon atoms, the copolymer containing the (fluoroalkyl)ethylene unit in an amount of 0.8 to 2.5 mol % relative to the amount of all the monomer units and containing the ethylene unit and the tetrafluoroethylene unit at a molar ratio of 30.0/70.0 to 50.0/50.0, the film having a crystallinity of 68% or less, the crystallinity being calculated on the basis of a diffraction intensity curve of the film resulting from X-ray diffraction measurement.

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Patent Owner(s)

Patent OwnerAddress
DAIKIN INDUSTRIES LTDUMEDA CENTER BUILDING 4-12 NAKAZAKI-NISHI 2-CHOME KITA-KU OSAKA-SHI OSAKA 5308323 ?5308323

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukagawa, Ryouichi Settsu, JP 13 27
Higuchi, Tatsuya Settsu, JP 63 207
Kouketsu, Yasuko Settsu, JP 1 6
Sekiguchi, Takashi Settsu, JP 61 419
Shimono, Takeshi Settsu, JP 23 87

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