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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10252455 B1

PDFFull Text
Date of Patent:
Apr. 09, 2019

Filed:

Jan. 30, 2017

Ethylene-tetrafluoroethylene copolymer sheet and method for producing same

Applicant:

Agc Inc., Chiyoda-ku, JP;

Inventors:

Hiroshi Aruga, Chiyoda-ku, JP;

Tetsuya Hasegawa, Chiyoda-ku, JP;

Sho Masuda, Chiyoda-ku, JP;

Yoshiaki Higuchi, Chiyoda-ku, JP;

Assignee:

AGC Inc., Chiyoda-ku, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

David Sample

Assistant Examiner:

Donald M Flores, Jr

Int. Cl.
CPC ...
B29C 47/00 (2006.01); C08J 5/18 (2006.01); B29C 43/46 (2006.01); B29C 47/88 (2006.01); B29C 43/24 (2006.01); B29C 43/00 (2006.01); B29K 27/12 (2006.01); B29K 105/00 (2006.01); B29L 7/00 (2006.01); B29L 31/00 (2006.01); B29C 47/14 (2006.01); B29C 47/40 (2006.01);
U.S. Cl.
CPC ...
B29C 47/0004 (2013.01); B29C 43/003 (2013.01); B29C 43/24 (2013.01); B29C 43/46 (2013.01); B29C 47/004 (2013.01); B29C 47/0021 (2013.01); B29C 47/884 (2013.01); C08J 5/18 (2013.01); B29C 47/14 (2013.01); B29C 47/40 (2013.01); B29C 47/8845 (2013.01); B29C 2043/462 (2013.01); B29C 2043/467 (2013.01); B29K 2027/12 (2013.01); B29K 2105/0067 (2013.01); B29K 2105/0085 (2013.01); B29L 2007/002 (2013.01); B29L 2031/755 (2013.01); C08J 2323/08 (2013.01); C08J 2327/18 (2013.01);
Abstract

An ethylene/tetrafluoroethylene copolymer sheet obtained by extrusion, has R/d, wherein Ris an in-plane phase difference [unit: nm]and d is a thickness, [unit: nm], of at most 3.0×10, and a thickness of more than 300 μm. The ethylene/tetrafluoroethylene copolymer sheet preferably has a thickness of from 305 to 3,000 μm . A process for producing an ethylene/tetrafluoroethylene copolymer sheet includes melting an ethylene/tetrafluoroethylene copolymer to obtain a melt, continuously extruding the melt through a die for shaping the melt to a sheet, and letting the sheet pass between two rolls. One of the two rolls is a rigid roll, and the other is an elastic roll. The two rolls are pressed under a linear pressure of from 0.1 to 1,000 N/cm.

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