Title:
CO-INJECTION MOLDED MULTILAYER STRUCTURE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/225698
Kind Code:
A1
Abstract:
Provided is a co-injection molded multilayer structure which comprises a barrier layer and outer layers that are laminated on both sides of the barrier layer so as to be in contact therewith, and which is configured such that: the barrier layer is formed from a resin composition (X) that contains an ethylene-vinyl alcohol copolymer (A) and an alkali metal salt (B) of a higher fatty acid having a melting point of 250°C or less; the ethylene-vinyl alcohol copolymer (A) has an ethylene unit content of 20-60% by mole and a saponification degree of 90% or more; the content of the alkali metal salt (B) in the barrier layer is 50-1,500 ppm in terms of metal atoms; the outer layers are formed from a resin composition (Y) that contains an unmodified high-density polyethylene (F) and a maleic acid anhydride-modified polyethylene (G); and the maleic acid anhydride modification rate relative to the whole resin composition (Y) is 0.005-0.1 wt%. This co-injection molded multilayer structure has excellent adhesiveness and consequently, the oxygen barrier performance thereof is able to be maintained even after being subjected to an impact caused by dropping or the like.
Inventors:
SUZUKI MAKOTO (JP)
HOUSSIER DIDIER (BE)
HOUSSIER DIDIER (BE)
Application Number:
PCT/JP2018/021424
Publication Date:
December 13, 2018
Filing Date:
June 04, 2018
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B32B27/28; B29C45/00; B29C45/16; B32B27/08; B32B27/32; B65D65/40; C08G61/08; C08K5/098; C08L23/06; C08L29/04
Domestic Patent References:
| WO2000051907A1 | 2000-09-08 | |||
| WO2009107629A1 | 2009-09-03 | |||
| WO2011027741A1 | 2011-03-10 |
Foreign References:
| JP2001341535A | 2001-12-11 | |||
| JP2005187808A | 2005-07-14 |
Attorney, Agent or Firm:
SETOUCHI INTERNATIONAL PATENT FIRM (JP)
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