Title:
REFRIGERANT TRANSPORTING HOSE AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2012/043084
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a refrigerant transporting hose capable of having both barrier properties (resistance to refrigerant permeation) and flexibility, and of solving the problem of cracks in the hose being caused when the hose is bent. The refrigerant transporting hose has a butyl rubber layer (7) formed around the outer circumferential surface of a tubular resin layer (1) being in contact with a refrigerant, and an ethylene-propylene-based rubber layer (8) formed around the outer circumferential surface thereof. The resin layer (1) is made of a material for a resin layer mainly containing a blend of polyamide resin and modified polyolefin elastomer. A skin layer (6) is formed only on an inner circumferential surface of the resin layer (1). The elastic modulus in tension (A) of the skin layer (6), the elastic modulus in tension (B) of the resin layer (1) excluding the skin layer (6), the elastic modulus in tension (C) of the butyl rubber layer (7) and the elastic modulus in tension (D) of the ethylene-propylene-based rubber layer (8) satisfy the following relation of the following formula (α): (A) > (B) > (C) > (D) ... (α).
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Inventors:
OYAIZU NAOKI (JP)
KATAYAMA KAZUTAKA (JP)
TAGUCHI TAKEHIKO (JP)
KATAYAMA KAZUTAKA (JP)
TAGUCHI TAKEHIKO (JP)
Application Number:
PCT/JP2011/068652
Publication Date:
April 05, 2012
Filing Date:
August 18, 2011
Export Citation:
Assignee:
TOKAI RUBBER IND LTD (JP)
OYAIZU NAOKI (JP)
KATAYAMA KAZUTAKA (JP)
TAGUCHI TAKEHIKO (JP)
OYAIZU NAOKI (JP)
KATAYAMA KAZUTAKA (JP)
TAGUCHI TAKEHIKO (JP)
International Classes:
F16L11/08; B29C48/09; B29C48/21; B32B1/08; B32B25/18
Foreign References:
| JP4365454B1 | 2009-11-18 | |||
| JPH07117178A | 1995-05-09 | |||
| JP2001317662A | 2001-11-16 | |||
| JP2009220516A | 2009-10-01 | |||
| JP2009174696A | 2009-08-06 | |||
| JP4365454B1 | 2009-11-18 |
Other References:
See also references of EP 2525124A4
Attorney, Agent or Firm:
SAITOH Yukihiko (JP)
Masahiko Nishifuji (JP)
Masahiko Nishifuji (JP)
Download PDF:
Claims: