Title:
SUTURE FOR OPERATION AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3548873
Kind Code:
B2
Abstract:
PURPOSE: To obtain a monofilament medical suture desirable both in cost effectiveness and performance by including as an essential copmonent a copolymer consisting of lactic acid and ε-caprolactone as a recurring unit and also specifying the shrinkage factor.
CONSTITUTION: The suture for an operation is prepared from a copolymer as an essential component consisting of lactic acid and ε-caprolactone as a recurring unit and has the shrinkage factor (at 60°C×20 hours) specified at 5.0% or less. Additionally, in manufacturing the suture, first (process A), in melt spinning and underwater drawing, the copolymer is melt-spun having lactic acid and ε-caprolactone as a recurring unit. Second (process A), redrawing is carried out since the tension strength of a filament is insufficient as a suture after the underwater drawing, enhancing the tension strength. Successively (process C), a thermal setting under tension is performed for the filament. Then (process D), a relaxation treatment is performed without tension so as not to interfere the shrinkage of the filament.
Inventors:
Kenji Tomita
Ikuo Sasaki
Masakazu Suzuki
Ikuo Sasaki
Masakazu Suzuki
Application Number:
JP15259695A
Publication Date:
July 28, 2004
Filing Date:
May 25, 1995
Export Citation:
Assignee:
GUNZE LIMITED
International Classes:
A61L17/00; A61L17/10; A61L17/12; (IPC1-7): A61L17/00
Domestic Patent References:
| JP64056055A | ||||
| JP5103825A | ||||
| JP7070297A |
Foreign References:
| US5279783 |
Attorney, Agent or Firm:
Eiji Saegusa
Kakehi Yuro
Takeshi Ohara
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano
Kakehi Yuro
Takeshi Ohara
Kenji Saito
Jun Fujii
Hitoshi Seki
Mutsuko Nakano
Previous Patent: MUSIC DEVICE WITH MUSICAL TONE PITCH DECODING FUNCTION
Next Patent: UNREGURATED TYPE BAR CODE READ CIRCUIT
Next Patent: UNREGURATED TYPE BAR CODE READ CIRCUIT