Title:
MULTI-LAYER STRUCTURE AND MULTI-LAYER PIPE
Document Type and Number:
WIPO Patent Application WO/2021/261301
Kind Code:
A1
Abstract:
Provided are a multi-layer structure and a multi-layer pipe in which high gas barrier properties are achieved and the occurrence of cracking upon heating and deformation is suppressed. This multi-layer structure has at least one layer (X) that is formed from a resin composition (x) containing an ethylene-vinyl alcohol copolymer (A) and an acid-modified ethylene-α olefin copolymer (B), the total number of layers in the multi-layer structure being three or greater, and the multi-layer structure being such that: the total thickness of all layers is 500 μm or greater, and the thickness of the layer (X) is 30 μm or greater; the mass ratio (B/A) of the acid-modified ethylene-α olefin copolymer (B) to the ethylene-vinyl alcohol copolymer (A) is 3/97-15/85 (inclusive); and the acid value of the acid-modified ethylene-α olefin copolymer (B) is 8.5-15 mg KOH/g (inclusive).
Inventors:
SUZUKI MAKOTO (JP)
OSHITA MIZUKO (JP)
OSHITA MIZUKO (JP)
Application Number:
PCT/JP2021/022392
Publication Date:
December 30, 2021
Filing Date:
June 11, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B32B1/08; B32B27/28; F16L11/04
Domestic Patent References:
| WO2019142808A1 | 2019-07-25 |
Foreign References:
| JP2018058943A | 2018-04-12 | |||
| JP2005248033A | 2005-09-15 | |||
| JP2019059059A | 2019-04-18 | |||
| JP2010234777A | 2010-10-21 | |||
| JP2008030386A | 2008-02-14 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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