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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 9828163 B1

PDFFull Text
Date of Patent:
Nov. 28, 2017

Filed:

Dec. 14, 2012

Heat-resistant food container and its manufacturing method

Applicant:

Nakamoto Packs Co., Ltd., Osaka, JP;

Inventors:

Katsuro Sasauchi, Osaka, JP;

Shigeru Takaoka, Osaka, JP;

Assignee:

NAKAMOTO PACKS CO., LTD., Osaka-shi, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

James Yager

Int. Cl.
CPC ...
B29D 22/00 (2006.01); B65D 81/38 (2006.01); B29C 51/10 (2006.01); C08L 67/02 (2006.01); B29C 51/00 (2006.01); B29C 51/02 (2006.01); B29C 47/56 (2006.01); B29C 47/06 (2006.01); B29C 51/14 (2006.01); B29C 65/02 (2006.01); B65D 1/22 (2006.01); B29C 47/00 (2006.01); B29C 47/08 (2006.01); B29C 47/10 (2006.01); B29K 67/00 (2006.01); B29C 47/76 (2006.01); B29C 47/88 (2006.01); B29K 105/00 (2006.01); B29L 31/00 (2006.01); B29K 105/26 (2006.01);
U.S. Cl.
CPC ...
B65D 81/38 (2013.01); B29C 47/0004 (2013.01); B29C 47/0021 (2013.01); B29C 47/0054 (2013.01); B29C 47/0064 (2013.01); B29C 47/065 (2013.01); B29C 47/56 (2013.01); B29C 47/8805 (2013.01); B29C 47/8845 (2013.01); B29C 51/002 (2013.01); B29C 51/02 (2013.01); B29C 51/10 (2013.01); B29C 51/14 (2013.01); B29C 65/02 (2013.01); B65D 1/22 (2013.01); C08L 67/02 (2013.01); B29C 47/0019 (2013.01); B29C 47/0057 (2013.01); B29C 47/0871 (2013.01); B29C 47/0898 (2013.01); B29C 47/1009 (2013.01); B29C 47/1027 (2013.01); B29C 47/767 (2013.01); B29C 47/884 (2013.01); B29C 2791/006 (2013.01); B29K 2067/003 (2013.01); B29K 2105/0005 (2013.01); B29K 2105/0047 (2013.01); B29K 2105/0085 (2013.01); B29K 2105/0088 (2013.01); B29K 2105/26 (2013.01); B29K 2867/003 (2013.01); B29L 2031/712 (2013.01);
Abstract

This invention provides a food container which can be manufactured cheaply by using inexpensive general PET resin or further inexpensive PET resin for fiber or recovered PET flakes, and nevertheless, which has a high heat resistance up to 250° C., and the container is obtained by adding a chain extender and a compatibilizer and talc to PET resin, charging the mixture into an extruderhaving two or more vent holes, degassing under a condition where the PET resin is melted with heating by sucking at a high vacuum of −99.99 kPa or lower from the vent holes, thereafter, forming a sheet by extrusion molding, pressure-forming with vacuum the sheet by a thermoforming machine, forming the container by keeping in a mold at 100-220° C. The container has a total of the content of crystal portion represented by the following formula and the content of talc being 25% by weight or more.

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