Title:
熱水殺菌処理された包装体及びその製造方法
Document Type and Number:
Japanese Patent JP7015792
Kind Code:
B2
Abstract:
A hot-water sterilized package includes a container having a barrier layer filled with contents, wherein the barrier layer contains 96 mass % or more of a modified ethylene-vinyl alcohol copolymer based on the resin total, the modified ethylene-vinyl alcohol copolymer is represented by a following formula (I), contents (mol %) of a, b, and c based on the total monomer units satisfy following formulae (1) through (3), a degree of saponification (DS) defined by a following formula (4) is 90 mol % or more, and in measurement using a differential scanning calorimeter (DSC), crystalline melting enthalpy (ΔHA: J/g) during temperature rise in a hydrated state and crystalline melting enthalpy (ΔHB: J/g) during temperature rise after drying and melting followed by rapid cooling satisfy following formulae (5) and (6). A container constituting such a package has excellent in oxygen barrier properties even after hot-water sterilization, and thus degradation of content quality is inhibited for a long period.18≤a≤55 (1)0.01≤c≤20 (2)[100−(a+c)]×0.9≤b≤[100−(a+c)] (3)DS=[(Total Number of Moles of Hydrogen Atoms in X,Y, and Z)/(Total Number of Moles of X,Y, and Z)]×100 (4)ΔHA/ΔHB≥0.5 (5)ΔHB≥70 (6).
Inventors:
Rina Hoshika
Okamoto Masato
Suzuki Makoto
Okamoto Masato
Suzuki Makoto
Application Number:
JP2018559645A
Publication Date:
February 03, 2022
Filing Date:
December 28, 2017
Export Citation:
Assignee:
KURARAY CO.,LTD.
International Classes:
B65D81/24; C08F8/12; C08F210/02; C08F218/08
Domestic Patent References:
| JP2014034647A | ||||
| JP2015151428A | ||||
| JP2010059418A |
Foreign References:
| WO2015115511A1 |
Attorney, Agent or Firm:
Setouchi International Patent Firm