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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 9938406 B1

PDFFull Text
Date of Patent:
Apr. 10, 2018

Filed:

May. 14, 2013

Polylactic acid resin sheet for thermal molding use

Applicant:

Kao Corporation, Tokyo, JP;

Inventors:

Ryoichi Hashimoto, Iwade, JP;

Munehisa Okutsu, Takaishi, JP;

Hirofumi Nakanishi, Wakayama, JP;

Assignee:

KAO CORPORATION, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Jeffrey Wollschlager

Int. Cl.
CPC ...
B29C 47/88 (2006.01); C08L 67/04 (2006.01); C08K 5/06 (2006.01); B29C 51/00 (2006.01); B29C 51/10 (2006.01); C08J 5/18 (2006.01); C08K 5/11 (2006.01); C08K 5/20 (2006.01); C08K 5/521 (2006.01); C08K 5/00 (2006.01); B29B 11/10 (2006.01); B29C 47/00 (2006.01); B29K 67/00 (2006.01); B29K 105/00 (2006.01);
U.S. Cl.
CPC ...
C08L 67/04 (2013.01); B29B 11/10 (2013.01); B29C 47/0021 (2013.01); B29C 51/002 (2013.01); B29C 51/10 (2013.01); C08J 5/18 (2013.01); C08K 5/0016 (2013.01); C08K 5/0083 (2013.01); C08K 5/06 (2013.01); C08K 5/11 (2013.01); C08K 5/20 (2013.01); C08K 5/521 (2013.01); B29C 47/8845 (2013.01); B29K 2067/046 (2013.01); B29K 2105/0005 (2013.01); B29K 2105/0038 (2013.01); C08J 2367/04 (2013.01);
Abstract

A sheet for thermoforming made of a polylactic acid resin composition containing a polylactic acid-based resin, a plasticizer, and a crystal nucleating agent, wherein the sheet has a thickness of from 0.1 to 1.5 mm, and wherein Re (cal) calculated by the following formula (A): Re (cal)=Re (obs)/d×10(A), wherein Re (obs) is a phase difference (nm) measured at a wavelength selected from wavelengths of from 380 to 780 nm, and d is a thickness (mm) of the sheet, is within the range of 0.001×10≤Re(cal)≤1×10. The sheet for thermoforming of the present invention has a wide moldable temperature region, so that the sheet can be suitably used in various applications such as food containers, packaging materials for daily sundries and household electric appliances, industrial trays of industrial parts, and the like.

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