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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 8993109 B1

PDFFull Text
Date of Patent:
Mar. 31, 2015

Filed:

Jun. 14, 2010

Void-containing heat-shrinkable polyester film and process for production thereof

Applicants:

Shigetomo Yamamoto, Inuyama, JP;

Masayuki Haruta, Tsuruga, JP;

Yukinobu Mukoyama, Tsuruga, JP;

Masakazu Iwasaki, Inuyama, JP;

Inventors:

Shigetomo Yamamoto, Inuyama, JP;

Masayuki Haruta, Tsuruga, JP;

Yukinobu Mukoyama, Tsuruga, JP;

Masakazu Iwasaki, Inuyama, JP;

Assignee:

Toyo Boseki Kabushiki Kaisha, Osaka, JP;

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Ronak Patel

Int. Cl.
CPC ...
B32B 3/26 (2006.01); B29C 55/10 (2006.01); B29C 55/00 (2006.01); B29C 55/02 (2006.01); B29C 55/14 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); C08L 67/02 (2006.01); B29K 23/00 (2006.01); B29K 67/00 (2006.01); B29K 105/04 (2006.01); C08L 23/02 (2006.01);
U.S. Cl.
CPC ...
B29C 55/005 (2013.01); B29C 55/023 (2013.01); B29C 55/143 (2013.01); B29K 2023/38 (2013.01); B29K 2067/00 (2013.01); B29K 2105/04 (2013.01); B29K 2995/0049 (2013.01); B32B 3/266 (2013.01); B32B 27/08 (2013.01); B32B 27/205 (2013.01); B32B 27/325 (2013.01); B32B 27/36 (2013.01); B32B 2250/03 (2013.01); B32B 2250/24 (2013.01); B32B 2250/244 (2013.01); B32B 2250/40 (2013.01); B32B 2264/0257 (2013.01); B32B 2270/00 (2013.01); B32B 2305/026 (2013.01); B32B 2305/30 (2013.01); B32B 2307/412 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/5825 (2013.01); B32B 2307/72 (2013.01); B32B 2307/736 (2013.01); B32B 2307/75 (2013.01); B32B 2519/00 (2013.01); C08L 23/02 (2013.01); C08L 67/02 (2013.01);
Abstract

Disclosed is a void-containing heat-shrinkable polyester film which is composed of at least two layers, wherein at least one of the layers is a polyester resin layer comprising a cyclic polyolefin resin and containing voids. The film has an apparent specific gravity of less than 1.00 and has specified heat shrinking properties and mechanical properties. Also disclosed is a void-containing heat-shrinkable polyester film as mentioned above, which exhibits specified cuttability along a perforation. Further disclosed is a process for producing a void-containing heat-shrinkable polyester film as mentioned above.

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