Title:
FLEXIBLE TUBE
Document Type and Number:
WIPO Patent Application WO/2023/233899
Kind Code:
A1
Abstract:
This flexible tube is formed by molding a thermoplastic resin composition into a tube shape, has favorable physical properties for a roller pump or the like, and has high durability. The resin composition, in a stress-strain curve, does not fracture until the strain is 300%, a value obtained by primary differentiation of an approximation formula of the stress-strain curve in a region up to the fracture point is positive, and an evaporation residue of a leaching solution obtained by immersing the resin composition for one hour at 25°C using n-Heptane as a solvent is 150 μg/ml or less. The resin composition, in the stress-strain curve, has characteristics in which a tensile stress at 100% strain is 4.5-8.0 MPa, and a tensile stress at 300% strain is within a range of 11.0-19.0 MPa. The resin composition contains, as a plasticizer, 48-93 parts by weight of adipic acid polyester, having a weight average molecular weight of 3500-5500, per 100 parts by weight of a thermoplastic resin, preferably, in particular, a halogen-containing thermoplastic resin.
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Inventors:
NUMATA KENICHI (JP)
KONISHI TAKUMI (JP)
KONISHI TAKUMI (JP)
Application Number:
PCT/JP2023/016919
Publication Date:
December 07, 2023
Filing Date:
April 28, 2023
Export Citation:
Assignee:
TOYOX KK (JP)
International Classes:
F16L11/06; B29C48/10
Domestic Patent References:
| WO2021149782A1 | 2021-07-29 |
Foreign References:
| JP2002502735A | 2002-01-29 | |||
| JP2015166608A | 2015-09-24 | |||
| JP2020007400A | 2020-01-16 | |||
| JPS60195138A | 1985-10-03 |
Attorney, Agent or Firm:
HIROSAWA Isao (JP)
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