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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 10450431 B1

PDFFull Text
Date of Patent:
Oct. 22, 2019

Filed:

Jun. 11, 2014

Poly(meth)acrylimide film, easy-adhesion film using same, and method for manufacturing such films

Applicant:

Riken Technos Corporation, Tokyo, JP;

Inventors:

Kohei Nakashima, Tokyo, JP;

Kazutaka Yamada, Tokyo, JP;

Hidemasa Sugimoto, Tokyo, JP;

Yoshihiro Zennyoji, Tokyo, JP;

Assignee:

RIKEN TECHNOS CORPORATION, , JP;

Attorneys:

Bracewell LLP

Brad Y. Chin

Primary Examiner:

Stella K Yi

Int. Cl.
CPC ...
B29C 59/16 (2006.01); C08J 5/18 (2006.01); B29C 59/10 (2006.01); B29C 71/04 (2006.01); B32B 27/06 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); C08J 7/04 (2006.01); C08J 7/06 (2006.01); C08J 7/12 (2006.01); B29C 48/08 (2019.01); B29C 48/00 (2019.01); B29C 48/30 (2019.01); B29C 48/92 (2019.01); B29C 48/305 (2019.01); B29C 48/40 (2019.01); B29C 48/88 (2019.01); B29K 79/00 (2006.01); B29L 7/00 (2006.01); B29C 48/27 (2019.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 48/0019 (2019.02); B29C 48/08 (2019.02); B29C 48/30 (2019.02); B29C 48/305 (2019.02); B29C 48/402 (2019.02); B29C 48/9145 (2019.02); B29C 48/92 (2019.02); B29C 59/10 (2013.01); B29C 71/04 (2013.01); B32B 27/06 (2013.01); B32B 27/281 (2013.01); B32B 27/308 (2013.01); C08J 7/042 (2013.01); C08J 7/047 (2013.01); C08J 7/065 (2013.01); C08J 7/123 (2013.01); B29C 48/022 (2019.02); B29C 48/2715 (2019.02); B29C 48/914 (2019.02); B29C 48/918 (2019.02); B29C 2948/92704 (2019.02); B29K 2079/08 (2013.01); B29L 2007/008 (2013.01); B32B 2457/20 (2013.01); C08J 2333/24 (2013.01); C08J 2333/26 (2013.01); C08J 2433/08 (2013.01); C08J 2475/04 (2013.01);
Abstract

Embodiments of the invention relate to a poly(meth)acrylimide film and a method for manufacturing such a film. At least one embodiment provides a poly(meth)acrylimide film that has (i) a total light transmittance of over 90% and (ii) haze of 2.0% or less. This film preferably has retardation of less than 50 nm. The method for manufacturing this film includes the following steps: (A) using a device provided with an extruder and a T die, a poly(meth)acrylimide molten film is continuously extruded from the T die; and (B) the poly(meth)acrylimide molten film is loaded by being fed between a rotating or circulating first mirrored-surface body and a rotating or circulating second mirrored-surface body, and then the film is pressed. During these steps, (C) the surface temperature of the first mirrored-surface body is in the range 100-200° C., and (D) the surface temperature of the second mirrored-surface body is in the range 20-200° C.

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