Title:
MULTILAYER TUBE
Document Type and Number:
WIPO Patent Application WO/2021/066066
Kind Code:
A1
Abstract:
A multilayer tube is provided which suppresses the amount of calcium and organic component leaching to a low level and which can be realized as a tube that has mechanical properties at 60°C. This multilayer tube includes a first polyolefin resin layer configuring the innermost layer, and a second polyolefin resin layer arranged outside of the first polyolefin resin layer; the amount of calcium leaching, measured in accordance with SEMI F-57, of the material of the first polyolefin resin layer is less than 30 μg/m2; the ratio of the thickness of the first polyolefin resin layer to the total thickness of the first polyolefin resin layer and the second polyolefin resin layer is 0.011-0.17. By means of this configuration, it is possible to suppress the amount of leaching of calcium and organic substances to a low level, and to realize a pipe having a strength that takes into account a 60°C use environment.
Inventors:
UMEYAMA SHINTAROU (JP)
MAKINO KOUZOU (JP)
INUI YOSHIHIRO (JP)
MAKINO KOUZOU (JP)
INUI YOSHIHIRO (JP)
Application Number:
PCT/JP2020/037291
Publication Date:
April 08, 2021
Filing Date:
September 30, 2020
Export Citation:
Assignee:
SEKISUI CHEMICAL CO LTD (JP)
International Classes:
B32B27/32; B32B1/08; F16L11/06; H01L21/304
Domestic Patent References:
| WO2020080470A1 | 2020-04-23 |
Foreign References:
| JP2012224870A | 2012-11-15 | |||
| JP2004223910A | 2004-08-12 | |||
| JPH06221471A | 1994-08-09 | |||
| JP2005111895A | 2005-04-28 | |||
| JP2005224656A | 2005-08-25 | |||
| JP2006130909A | 2006-05-25 |
Attorney, Agent or Firm:
TANAKA, Junya et al. (JP)
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