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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 9221931 B1

PDFFull Text
Date of Patent:
Dec. 29, 2015

Filed:

Mar. 08, 2013

Method for producing polypropylene material, and polypropylene material

Applicant:

Sekisui Chemical Co., Ltd., Osaka, Osaka, JP;

Inventors:

Akira Nakasuga, Osaka, JP;

Hironori Tabata, Hirakata, JP;

Assignee:

SEKISUI CHEMICAL CO., LTD., Osaka, JP;

Attorney:

Cheng Law Group, PLLC

Primary Examiner:

Rip A Lee

Int. Cl.
CPC ...
C08F 110/06 (2006.01); B29C 71/02 (2006.01); B29C 71/00 (2006.01); C08F 10/06 (2006.01); C08L 23/16 (2006.01); B29K 23/00 (2006.01);
U.S. Cl.
CPC ...
C08F 110/06 (2013.01); B29C 71/0063 (2013.01); B29C 71/0072 (2013.01); B29C 71/02 (2013.01); B29C 2071/022 (2013.01); B29K 2023/12 (2013.01); C08F 10/06 (2013.01); C08L 23/16 (2013.01);
Abstract

Provided is a method for producing a polypropylene material, which can improve the heat resistance of the polypropylene material. The method for producing a polypropylene material comprises: a melting step of melting a polypropylene material rolled in at least one direction, at a temperature that is higher than Tm+5° C. where Tm is a melting peak temperature of the polypropylene material not rolled yet as measured by differential scanning calorimetry, and is equal to or lower than Tm+60° C.; and a heat treatment step of heat-treating the polypropylene material melted in the melting step, at a temperature that is equal to or higher than Tm−20° C., and is lower than Tm−10° C.

Find Patent Forward Citations

Nakasuga, Akira. (2015). Method for producing polypropylene material, and polypropylene material (U.S. Patent No. 9221931). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9221931

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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