Title:
MULTILAYER STRUCTURE, METHOD FOR PRODUCING SAME, SHEET FOR PREVENTING DIFFUSION OF HAZARDOUS SUBSTANCE, LANDFILL GEOMEMBRANE AND MULTILAYER PIPE
Document Type and Number:
WIPO Patent Application WO/2021/215313
Kind Code:
A1
Abstract:
The present invention provides: a multilayer structure which exhibits high initial interlayer adhesion and is suppressed in decrease of the interlayer adhesion even in cases where the multilayer structure is used for a long period of time in a harsh environment where the multilayer structure is exposed to hot water, an acid or an alkali, and the like; a method for producing this multilayer structure; and a sheet for preventing diffusion of a hazardous substance, a landfill geomembrane and a multilayer pipe, each of said sheet, landfill geomembrane and multilayer pipe being provided with this multilayer structure. A multilayer structure which is provided with: one or more layers (A), each of which is formed of a resin composition (A) that is mainly composed of an ethylene-vinyl alcohol copolymer (a); and one or more layers (B), each of which is formed of a resin composition (B) that contains a modified polyolefin (b) having a basic nitrogen-containing group. With respect to this multilayer structure, the ethylene-vinyl alcohol copolymer (a) has at least one of a carboxy group and a lactone ring; and the total amount of the carboxy group and the lactone ring is from 0.08% by mole to 0.4% by mole relative to the total amount of ethylene units, vinyl alcohol units and vinyl ester units in the ethylene-vinyl alcohol copolymer (a).
Inventors:
HATA KAZUHIRA (JP)
OSHITA TATSUYA (JP)
SHIGA RYOHEI (JP)
OSHITA TATSUYA (JP)
SHIGA RYOHEI (JP)
Application Number:
PCT/JP2021/015359
Publication Date:
October 28, 2021
Filing Date:
April 13, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
MITSUI CHEMICALS INC (JP)
MITSUI CHEMICALS INC (JP)
International Classes:
B32B27/32; B32B1/08; F16L9/133; F16L11/04
Domestic Patent References:
| WO2017104731A1 | 2017-06-22 | |||
| WO2019194318A1 | 2019-10-10 | |||
| WO2020145239A1 | 2020-07-16 | |||
| WO2004092234A1 | 2004-10-28 |
Foreign References:
| JP2007283582A | 2007-11-01 | |||
| JP2006249392A | 2006-09-21 | |||
| JP2018145396A | 2018-09-20 | |||
| JP2012041076A | 2012-03-01 | |||
| JP2015531324A | 2015-11-02 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
Download PDF:
Previous Patent: MICROSCOPE OPTICAL SYSTEM, MICROSCOPE DEVICE, AND IMAGE FORMATION LENS
Next Patent: RANGING DEVICE
Next Patent: RANGING DEVICE