Title:
多層発泡シート
Document Type and Number:
Japanese Patent JP6754278
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multilayer foamed sheet capable of obtaining a molded body which greatly suppresses a lamination amount of a resin layer, secures high surface smoothness, has high surface smoothness by thermoforming, and has good reproductivity of a mold shape.SOLUTION: A multilayer foamed sheet has a polystyrene-based resin foamed layer and a thermoplastic resin film layer laminated and bonded to at least one surface of the foamed layer and has a thickness of 0.5 mm to 2.0 mm, where a thickness of the thermoplastic resin film layer is 10-60 μm, apparent density A of the multilayer foamed sheet is 170-420 kg/m, apparent density B of a surface layer portio being a portion to 200 μm in a thickness direction from the surface of the film layer side of the multilayer foamed sheet is higher than the apparent density A of the multilayer foamed sheet and is 320 kg/mor more, and arithmetic average roughness Ra of the surface of the film layer side of the multilayer foamed sheet is 1.5 μm or less.SELECTED DRAWING: None
Inventors:
Akira Iwamoto
Yoshinari Saito
Masahiro Takeuchi
Yoshinari Saito
Masahiro Takeuchi
Application Number:
JP2016224701A
Publication Date:
September 09, 2020
Filing Date:
November 18, 2016
Export Citation:
Assignee:
JSP Corporation
International Classes:
B32B5/18; B32B27/30
Domestic Patent References:
| JP2012011641A | ||||
| JP2015189864A | ||||
| JP2005319764A | ||||
| JP2009155557A |
Attorney, Agent or Firm:
Toshio Nishizawa