Title:
MULTILAYER PIPE
Document Type and Number:
Japanese Patent JP2023027505
Kind Code:
A
Abstract:
To provide a multilayer pipe capable of suppressing deterioration of physical properties and having high fire resistance.SOLUTION: A multilayer pipe comprises an inner layer 1, an intermediate layer 2 arranged outside the inner layer 1, and an outer layer 3 arranged outside the intermediate layer 2. The intermediate layer 2 contains polyvinyl chloride resin, thermally expandable graphite and zeolite. The content of the thermally expandable graphite is 5 pts.mass to 20 pts.mass with respect to 100 pts.mass of the polyvinyl chloride resin, and the content of the zeolite is 0.5 pt.mass to 3.0 pts.mass with respect to 100 pts.mass of the polyvinyl chloride resin.SELECTED DRAWING: Figure 1
Inventors:
NAKANO HAJIME
KONAMI YOSHIYUKI
YAMAMOTO YOSHIHIRO
KONAMI YOSHIYUKI
YAMAMOTO YOSHIHIRO
Application Number:
JP2021132636A
Publication Date:
March 02, 2023
Filing Date:
August 17, 2021
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
B32B1/08; F16L9/12; B32B18/00; B32B27/18; B32B27/32; E04B1/94
Attorney, Agent or Firm:
Masahiro Taguchi
Shigeo Torayama
Shigeo Torayama