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.

Date of Patent:
Apr. 28, 2026

Filed:

Jul. 10, 2015
Applicant:

Kuraray Co., Ltd., Kurashiki, JP;

Inventors:

Hiroshi Kawai, Kurashiki, JP;

Yasuhiro Nonaka, Kurashiki, JP;

Syunsuke Fujioka, Kurashiki, JP;

Hatsuyo Miyake, Kurashiki, JP;

Assignee:

KURARAY CO., LTD., Kurashiki, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29B 9/12 (2006.01); B29C 49/00 (2006.01); B29C 49/22 (2006.01); B29C 51/14 (2006.01); B29K 23/00 (2006.01); B32B 7/12 (2006.01); B32B 15/085 (2006.01); B32B 15/09 (2006.01); B32B 15/20 (2006.01); B32B 27/08 (2006.01); B32B 27/10 (2006.01); B32B 27/20 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); B32B 27/36 (2006.01); B32B 27/40 (2006.01); B65D 1/40 (2006.01); B65D 65/38 (2006.01); C08F 8/12 (2006.01); C08F 216/06 (2006.01); C08J 3/20 (2006.01); C08J 3/205 (2006.01); C08J 5/18 (2006.01); C08K 3/36 (2006.01); C08K 5/098 (2006.01); C08L 23/06 (2006.01); C08L 23/0861 (2025.01); C08L 29/04 (2006.01); C23C 14/20 (2006.01); C23C 14/24 (2006.01); B29B 9/06 (2006.01); B29C 51/00 (2006.01); B29K 105/00 (2006.01);
U.S. Cl.
CPC ...
C08F 8/12 (2013.01); B29B 9/12 (2013.01); B29C 49/0005 (2013.01); B29C 49/22 (2013.01); B32B 7/12 (2013.01); B32B 15/085 (2013.01); B32B 15/09 (2013.01); B32B 15/20 (2013.01); B32B 27/08 (2013.01); B32B 27/10 (2013.01); B32B 27/20 (2013.01); B32B 27/28 (2013.01); B32B 27/302 (2013.01); B32B 27/304 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/322 (2013.01); B32B 27/34 (2013.01); B32B 27/36 (2013.01); B32B 27/365 (2013.01); B32B 27/40 (2013.01); B65D 1/40 (2013.01); B65D 65/38 (2013.01); C08F 216/06 (2013.01); C08J 3/203 (2013.01); C08J 3/2053 (2013.01); C08J 5/18 (2013.01); C08K 3/36 (2013.01); C08K 5/098 (2013.01); C08L 23/06 (2013.01); C08L 23/0861 (2013.01); C08L 29/04 (2013.01); C23C 14/20 (2013.01); C23C 14/24 (2013.01); B29B 9/06 (2013.01); B29C 51/002 (2013.01); B29C 51/14 (2013.01); B29K 2023/083 (2013.01); B29K 2105/253 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2255/205 (2013.01); B32B 2255/26 (2013.01); B32B 2255/28 (2013.01); B32B 2262/101 (2013.01); B32B 2264/102 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/518 (2013.01); B32B 2307/538 (2013.01); B32B 2307/54 (2013.01); B32B 2307/558 (2013.01); B32B 2307/7242 (2013.01); B32B 2307/7244 (2013.01); B32B 2307/738 (2013.01); B32B 2307/746 (2013.01); B32B 2307/748 (2013.01); B32B 2439/40 (2013.01); B32B 2439/46 (2013.01); B32B 2439/70 (2013.01); B32B 2439/80 (2013.01); C08J 3/205 (2013.01); C08J 2323/08 (2013.01); C08K 2201/005 (2013.01); C08L 2205/02 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2207/066 (2013.01);
Abstract

Provided are an ethylene-vinyl alcohol copolymer, a resin composition and a molded product thereof being superior in long-run stability of melt molding, with inhibited coloring and generation of film forming defects such as flaws in formed film and streaks, and also being superior in appearance characteristics. An ethylene-vinyl alcohol copolymer (A) obtained by saponifying a copolymer of ethylene and a vinyl ester, in which molecular weights determined by using gel permeation chromatography with a differential refractive index detector and an ultraviolet and visible absorbance detector after a heat treatment in a nitrogen atmosphere at 220° C. for 50 hrs satisfy the inequality (1):()/<0.45  (1)


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