Title:
多層管
Document Type and Number:
Japanese Patent JP7269133
Kind Code:
B2
Abstract:
To provide a multilayer pipe having heat insulation performance and a fire resistance performance.SOLUTION: A multilayer pipe has an inner layer, a foam layer, and an outer layer. The inner layer, the foam layer, and the outer layer each contain a thermoplastic resin. The multilayer pipe has heat-expandable graphite, where the content of the heat-expandable graphite with respect to the total amount of the inner layer is 5 to 16% by mass, the content of the heat-expandable graphite with respect to the total amount of the foam layer is 0 to 5% by mass, the content of the heat-expandable graphite with respect to the total amount of the outer layer is 0 to 2% by mass, and the content of the heat-expandable graphite with respect to the total amount of the multilayer pipe is 2 to 7% by mass.SELECTED DRAWING: Figure 1
Inventors:
Nakano Hajime
Hironobu Nakamura
Yasushi Matsunaga
Hironobu Nakamura
Yasushi Matsunaga
Application Number:
JP2019155939A
Publication Date:
May 08, 2023
Filing Date:
August 28, 2019
Export Citation:
Assignee:
Sekisui Chemical Co.,Ltd.
International Classes:
F16L57/04; B32B1/08; B32B5/18; F16L9/133
Domestic Patent References:
| JP2010274577A | ||||
| JP201859707A | ||||
| JP2005214228A | ||||
| JP201854045A | ||||
| JP2015224716A |
Foreign References:
| WO2018047974A1 | ||||
| US20190358944 |
Attorney, Agent or Firm:
Masahiro Taguchi
Shigeo Torayama
Hiroshi Chichimatsu
Shigeo Torayama
Hiroshi Chichimatsu