Title:
RECOVERY OF RESIN
Document Type and Number:
Japanese Patent JPH0663942
Kind Code:
A
Abstract:
PURPOSE: To reutilize an optical recording medium treated as industrial waste heretofore by recovering a resin from the optical recording medium made of a transparent resin having a protective coating film applied thereto.
CONSTITUTION: An optical recording medium made of a transparent resin having a protective coating film applied thereto is subjected to ultrasonic treatment in a diluted aqueous acid soln. with pH of 3.0 or less to release and separate the protective coating film and the remainder is washed and dried to recover the resin.
Inventors:
SHIMADA TSUNEO
KORIYAMA YUICHI
KORIYAMA YUICHI
Application Number:
JP22013392A
Publication Date:
March 08, 1994
Filing Date:
August 19, 1992
Export Citation:
Assignee:
TEIJIN CHEMICALS LTD
International Classes:
B29B13/08; B29B17/00; B29B17/04; G11B7/26; B29K69/00; B29K105/26; (IPC1-7): B29B17/00; B29B13/08; G11B7/26
Attorney, Agent or Firm:
Maeda Junhiro
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