Title:
PIPE JOINT AND METHOD FOR MANUFACTURING PIPE JOINT
Document Type and Number:
WIPO Patent Application WO/2022/181720
Kind Code:
A1
Abstract:
Provided is a pipe joint comprising a cylindrical hollow portion, wherein: the greatest-wall-thickness part of said pipe joint has a wall thickness of 2-7 mm; the ratio (L/D) of the length (L) of the hollow portion in the axial direction to the diameter (D) of the hollow portion is at most 5; said pipe joint contains a copolymer containing a tetrafluoroethylene unit and a fluoro(alkyl vinyl ether) unit; the content of the fluoro(alkyl vinyl ether) unit in the copolymer is 2.8-6.0 mass% with respect to the total content of monomer units; the melt flow rate of the copolymer at 372ºC is 4.0-11.0 g/10 min (exclusive of 11.0); and the number of functional groups in the copolymer is at most 50.
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Inventors:
TSUDA HAYATO (JP)
ISAKA TADAHARU (JP)
ZENKE YUMI (JP)
YAMAMOTO YUKARI (JP)
YAMAGUCHI YASUYUKI (JP)
HAMADA HIROYUKI (JP)
ISAKA TADAHARU (JP)
ZENKE YUMI (JP)
YAMAMOTO YUKARI (JP)
YAMAGUCHI YASUYUKI (JP)
HAMADA HIROYUKI (JP)
Application Number:
PCT/JP2022/007737
Publication Date:
September 01, 2022
Filing Date:
February 24, 2022
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
International Classes:
F16L11/06; C08F8/00; C08F214/26; H01B7/02
Domestic Patent References:
| WO2017056203A1 | 2017-04-06 | |||
| WO2010113864A1 | 2010-10-07 | |||
| WO2008032613A1 | 2008-03-20 |
Foreign References:
| JP2007238960A | 2007-09-20 | |||
| JPH04357398A | 1992-12-10 | |||
| JP2018020468A | 2018-02-08 | |||
| JP2002003514A | 2002-01-09 | |||
| JP2018123882A | 2018-08-09 |
Attorney, Agent or Firm:
TOKOSHIE PATENT FIRM (JP)
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