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Title:
HOSE FOR TRANSPORTATION OF REFRIGERANT
Document Type and Number:
WIPO Patent Application WO/2021/153079
Kind Code:
A1
Abstract:
Provided is a lightweight and flexible hose that is for transportation of a refrigerant and that has excellent low gas permeability and low water vapor permeability. This hose for transportation of a refrigerant comprises an inner layer, a reinforcement layer, and an outer layer. The inner layer and the outer layer respectively contain thermoplastic resin compositions each having a sea-island structure composed of a domain including an elastomer and of a matrix including a thermoplastic resin. The thermoplastic resin composition of the outer layer has a water vapor permeability coefficient of 10.0 g·mm/(m2·24h) or less at a temperature of 60ºC and a relative humidity of 100%. The thermoplastic resin composition of the inner layer has an oxygen permeability coefficient of 0.05 cm3·mm/(m2·day·mmHg) or less at a temperature of 21ºC and a relative humidity of 50%. The hose has a vapor permeability amount of 6.0 mg/(240h·cm2) or less. The hose has a chlorofluorocarbon HFO-1234yf permeability amount of 170 g/(m2·72h) or less. The mass per 1 m2 of the outer surface area of the hose is 3000 g/m2 or less.

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Inventors:
WAKABAYASHI KENTA (JP)
TOMOI SHUSAKU (JP)
SATO SHUN (JP)
Application Number:
PCT/JP2020/047263
Publication Date:
August 05, 2021
Filing Date:
December 17, 2020
Export Citation:
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Assignee:
YOKOHAMA RUBBER CO LTD (JP)
International Classes:
B32B27/00; B32B1/08; B32B3/10; C08K5/053; C08K5/16; C08L101/00; C08L101/12; F16L11/08
Foreign References:
JP2012189129A2012-10-04
JP2013228081A2013-11-07
JP2010184403A2010-08-26
JPH06294485A1994-10-21
JPH06294484A1994-10-21
JP2007032725A2007-02-08
JP2007009171A2007-01-18
JP2014095093A2014-05-22
JP2006063280A2006-03-09
JP2002212342A2002-07-31
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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