公开(公告)号：US20250059305A1

公开(公告)日：2025-02-20

申请号：US18720882

申请日：2022-12-22

Applicant: Kuraray Co., Ltd.

Inventor： Masahiro BABA ,  Shinnosuke AKUTAGAWA ,  Shingo UEYAMA ,  Hiroyuki KONISHI

IPC: C08F8/12 ,  C08F218/08

Abstract: A vinyl alcohol copolymer may include a vinyl alcohol constituent unit and an olefin constituent unit vinyl alcohol having 3 to 30 carbon atoms. Such a copolymer may satisfy at least one of: a difference between a melting point and a lowest heat-sealing temperature is 45° C. or more; and the lowest heat-sealing temperature is 80° C. or less. Such a copolymer may satisfy predetermined relational formulas based on intensities and the number average molecular weight obtained from a UV absorption detector and a refractive index detector in gel permeation chromatography measurement performed on the copolymer.