Title:
MULTILAYER STRUCTURE, METHOD FOR SEPARATING SAME, AND RECYCLING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/114032
Kind Code:
A1
Abstract:
Provided is a multilayer structure having excellent interlayer adhesiveness at high humidity, excellent barrier layer separation characteristics underwater, and excellent viscosity stability after separation and collection of resin constituting the barrier layer even if the barrier layer has been exposed to water during a separation and collection step. The multilayer structure according to the present invention includes a barrier layer (A), a water-soluble layer (B), and an adhesive layer (C), wherein the adhesive layer (C) is laminated on one or both surfaces of the barrier layer (A) with the water-soluble layer (B) interposed therebetween, the barrier layer (A) has, as a main component, a polyamide or ethylene-vinyl alcohol copolymer (a1), and the water-soluble layer (B) includes 100-2000 ppm of alkali metal ions (b1).
Inventors:
ISHIUCHI SATOSHI (JP)
SUZUKI MAKOTO (JP)
SUZUKI MAKOTO (JP)
Application Number:
PCT/JP2021/043077
Publication Date:
June 02, 2022
Filing Date:
November 24, 2021
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B32B27/00; B29B17/02; C08K5/053; C08K5/098; C08L29/04; C08L71/02; C08L101/14
Domestic Patent References:
| WO2013086950A1 | 2013-06-20 | |||
| WO2021132683A1 | 2021-07-01 |
Foreign References:
| JP2005088344A | 2005-04-07 | |||
| JPH11348201A | 1999-12-21 | |||
| JP2018534184A | 2018-11-22 | |||
| JP2021146507A | 2021-09-27 |
Attorney, Agent or Firm:
AMANO Kazunori (JP)
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