Title:
長鎖分岐ポリプロピレン樹脂組成物を含む非発泡層を有する多層発泡シート
Document Type and Number:
Japanese Patent JP6701783
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer foamed sheet which can suppress corrugation occurring in production, has a high expansion ratio, and is excellent in surface appearance, in circular extrusion foaming using a polypropylene resin composition.SOLUTION: A multilayer foamed sheet is produced by coextrusion of a polypropylene resin composition (X) for non-foamed layer containing 5-100 wt.% of a polypropylene resin (X1) having a long chain branched structure and 0-95 wt.% of a polypropylene resin (X2) having no long chain branched structure, where the total amount of the polypropylene resin (X1) and the polypropylene resin (X2) is 100 wt.%, and a polypropylene resin composition for foamed layer containing a polypropylene resin (W) and a foaming agent from a circular die.SELECTED DRAWING: None
Inventors:
Umemori Masaki
Yukio Hotta
Kuniyoshi Takahashi
Yukio Hotta
Kuniyoshi Takahashi
Application Number:
JP2016026866A
Publication Date:
May 27, 2020
Filing Date:
February 16, 2016
Export Citation:
Assignee:
Japan Polypropylene Corporation
International Classes:
B32B5/18; B29C44/00; B29C44/24; B29C48/21; B29C48/335; B32B27/32
Domestic Patent References:
| JP2001113653A | ||||
| JP2001253922A | ||||
| JP2014132068A | ||||
| JP2005153468A | ||||
| JP11105132A |
Attorney, Agent or Firm:
Patent business corporation Tsukuni