Title:
MEDICAL TUBE AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2005/061020
Kind Code:
A1
Abstract:
A medical tube (10) obtained through thermal curing and comprising mixed ingredients comprising a polyimide resin (11) and fluororesins (12, 13, and 14), wherein the fluororesins (13 and 14) have come, through melting, into the state of being exposed in at least the inner surface of the polyimide resin (11) and the inner surface or the inner and outer surfaces of the tube are surfaces having a low frictional resistance. This tube is obtained by: polymerizing an aromatic tetracarboxylic dianhydride with an aromatic diamine in a polar solvent to form a polyimide precursor solution; adding a fluororesin to the polyimide precursor solution or during the polymerization step to prepare a mixture solution comprising the polyimide precursor and the fluororesin; applying the mixture solution to the outer surface of a core wire in a given thickness; heating the coating to convert the precursor into an imide, the maximum temperature in this conversion being regulated to a temperature exceeding the melting point of the fluororesin; cooling the coated core wire; and then separating the resultant medical tube from the core wire. The medical tube has a small outer diameter, a thin wall, and high mechanical properties. The inner surface or the inner and outer surfaces of this tube have a low frictional resistance.
More Like This:
| WO/2007/073554 | BLOCK COPOLYMER PARTICLES |
| WO/2013/157846 | MEDICAL TUBE CATHETER AND METHOD FOR MANUFACTURING SAME |
| JP2023534073 | Silver-enhanced cannabinoid antibiotic |
Inventors:
YAMADA HIROSHI
AOYAMA CHISAKA
AOYAMA CHISAKA
Application Number:
PCT/JP2004/018178
Publication Date:
July 07, 2005
Filing Date:
December 07, 2004
Export Citation:
Assignee:
IST CORP (JP)
YAMADA HIROSHI
AOYAMA CHISAKA
YAMADA HIROSHI
AOYAMA CHISAKA
International Classes:
A61L29/04; B29C41/08; B29C59/00; G01N19/02; B29C35/02; (IPC1-7): A61L29/06; B29C41/14; B32B1/08
Foreign References:
| JP2003340946A | 2003-12-02 | |||
| JPH11156971A | 1999-06-15 |
Other References:
See also references of EP 1698359A4
Attorney, Agent or Firm:
IKEUCHI SATO & PARTNER PATENT ATTORNEYS (OAP TOWER 8-30, Tenmabashi 1-chome, Kita-k, Osaka-shi Osaka 26, JP)
Download PDF:
Previous Patent: METHODS AND COMPOSITION FOR SOFT TISSUE FEATURE RECONSTRUCTION
Next Patent: MEDICAL GUIDE WIRE COATED WITH CARBON FILM
Next Patent: MEDICAL GUIDE WIRE COATED WITH CARBON FILM