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Title:
FEMALE MEMBER FOR COUPLINGS
Document Type and Number:
WIPO Patent Application WO/2014/013989
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a female member for couplings which is appropriate for couplings of large-diameter-opening pipes, and exhibits excellent moldability, cracking resistance and sealing properties. The present invention is a female member for couplings which has a tube body having a cylindrical through-hole, a ring-shaped, inward-facing collar section projecting inward in the radial direction from the inner-circumferential surface of the tube body at one end of the through-hole, and a female-screw section positioned on the inner-circumferential surface of the tube body. The thickness of the tube body in the radial direction thereof is 5-20mm, the thickness of the inward-facing collar section in the axial direction thereof is 5-20mm, and the diameter of the through-hole formed by the inward-facing collar section is 40mm or more. Furthermore, the female member for couplings comprises a fluorine-containing polymer having a polymer unit based on tetrafluoroethylene and a polymer unit based on one or more types of perfluoro(alkyl vinyl ether), wherein the fluorine-containing polymer contains 3.0-7.0 mass% of the polymer unit based on the perfluoro(alkyl vinyl ether) in relation to all polymer units, and has a melt-flow rate of 4.5-15.0g/10 minutes.

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Inventors:
IMAMURA Hitoshi
KONO Hideki
SUKEGAWA Masamichi
YAMAGUCHI Yasuyuki
AOYAMA Takahisa
Application Number:
JP2013/069301
Publication Date:
January 23, 2014
Filing Date:
July 16, 2013
Export Citation:
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Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-Nishi 2-Chome, Kita-Ku, Osaka-Sh, Osaka 23, 〒5308323, JP)
International Classes:
F16L33/22; F16L19/02
Domestic Patent References:
WO1999046309A11999-09-16
Foreign References:
JP2009103286A2009-05-14
JP2001151825A2001-06-05
JP2002357289A2002-12-13
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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