Title:
METHOD OF STRETCHING CARBOXYMETHYL CELLULOSE FILM
Document Type and Number:
Japanese Patent JPH0671744
Kind Code:
A
Abstract:
PURPOSE: To provide a method of stretching a carboxylmethyl cellulose film for improving the mechanical strength of the carboxymethyl cellulose film.
CONSTITUTION: A carboxymethyl cellulose film is swelled in a water medium containing a hydrophilic organic solvent and water in the ratio of 50-90:50-100 at the weight ratio, and then stretched at least in one direction. Water medium is used at a temperature of 60°C or lower, and the swelling rate of the carboxymethyl cellulose film in the water medium is allowed to preferably be in the order of 10-150%.
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Inventors:
MATSUMOTO KIYOICHI
ASANO EIJI
ISHIHARA KAZUHIKO
ASANO EIJI
ISHIHARA KAZUHIKO
Application Number:
JP19908092A
Publication Date:
March 15, 1994
Filing Date:
July 01, 1992
Export Citation:
Assignee:
DAI ICHI KOGYO SEIYAKU CO LTD
MATSUMOTO KIYOICHI
MATSUMOTO KIYOICHI
International Classes:
B29C55/02; C08J5/18; C08J7/02; B29K1/00; B29L7/00; (IPC1-7): B29C55/02; C08J5/18; C08J7/02
Attorney, Agent or Firm:
Kenmi Niimi (1 person outside)
Next Patent: TRANSVERSELY TEARABLE FILM AND ITS PRODUCTION