Title:
POLYETHYLENE FOR PIPE AND COUPLING JOINT, AND MOLDED ARTICLE OF SAME
Document Type and Number:
WIPO Patent Application WO/2016/159168
Kind Code:
A1
Abstract:
This polyethylene for a pipe and coupling joint satisfies characteristics (1)-(5). Characteristic (1): a melt flow rate (HLMFR) of 5-20 g/10 minutes at a temperature of 190°C and a load of 21.6 kg. Characteristic (2): a density (D) of 0.954-0.960 g/cm3. Characteristic (3): a ratio (Mw/Mn) of 15-27 of the weight-average molecular weight (Mw) and number-average molecular weight (Mn) as measured by gel permeation chromatography (GPC). Characteristic (4): a breaking time (FNCT) of 150 hours or greater at 80°C and 5 MPa by full notch creep test. Characteristic (5): a Charpy impact strength (CIS) of 8.5 kJ/m2 or greater measured at -20°C.
Inventors:
HIRAMOTO TOMOMI (JP)
FUKUDA TETSUROU (JP)
FUKUDA TETSUROU (JP)
Application Number:
PCT/JP2016/060539
Publication Date:
October 06, 2016
Filing Date:
March 30, 2016
Export Citation:
Assignee:
JAPAN POLYETHYLENE CORP (JP)
International Classes:
C08F10/02; C08L23/06; C08L23/08; F16L9/12; F16L47/00
Domestic Patent References:
| WO2013146944A1 | 2013-10-03 |
Foreign References:
| JP2014208770A | 2014-11-06 | |||
| JP2013227545A | 2013-11-07 | |||
| JP2008114819A | 2008-05-22 |
Attorney, Agent or Firm:
EIKOH PATENT FIRM, P. C. (JP)
Patent business corporation glory patent firm (JP)
Patent business corporation glory patent firm (JP)
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