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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 10369727 B1

PDFFull Text
Date of Patent:
Aug. 06, 2019

Filed:

May. 16, 2016

Blow-molded foam and process for producing the same

Applicant:

Kyoraku Co., Ltd., Kyoto-shi, Kyoto, JP;

Inventors:

Masaaki Onodera, Yamato, JP;

Takehiko Sumi, Yamato, JP;

Teruo Tamada, Yamato, JP;

Yu Igarashi, Yamato, JP;

Yoshinori Ohno, Yamato, JP;

Assignee:

KYORAKY CO., LTD., Kyoto, JP;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

James F Hook

Int. Cl.
CPC ...
F16L 9/14 (2006.01); B29C 44/02 (2006.01); B29C 44/34 (2006.01); B29C 49/00 (2006.01); B29C 49/04 (2006.01); B60H 1/00 (2006.01); B29C 49/48 (2006.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01); B29L 23/00 (2006.01); B29L 31/30 (2006.01); B29L 22/00 (2006.01);
U.S. Cl.
CPC ...
B29C 44/02 (2013.01); B29C 44/3442 (2013.01); B29C 44/3469 (2013.01); B29C 44/352 (2013.01); B29C 49/0005 (2013.01); B29C 49/0047 (2013.01); B29C 49/04 (2013.01); B60H 1/00564 (2013.01); B29C 49/4802 (2013.01); B29K 2023/00 (2013.01); B29K 2023/10 (2013.01); B29K 2023/12 (2013.01); B29K 2105/046 (2013.01); B29L 2022/00 (2013.01); B29L 2023/004 (2013.01); B29L 2031/3005 (2013.01); Y10T 428/1376 (2015.01); Y10T 428/24355 (2015.01);
Abstract

An object of the invention is to provide a blow-molded foam which has homogeneous foamed cells in size, is light in weight, and is excellent in surface smoothness, and a process for producing the same. The invention is directed to a blow-molded foamhaving a wall portion formed in such a manner that a thermoplastic resin containing a foaming agent mixed therewith is subjected to blow molding. Herein, the wall portion has a closed cell structure in which a plurality of foamed cells are contained. The wall portion has an expansion ratio of not less than 2.0 times. The wall portion has an outer face having a center-line average surface roughness Ra of less than 9.0 μm. The foamed cell has a cell diameter having a standard deviation of less than 40 μm in a thickness direction of the wall portion.

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