Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 31, 2010
Patent Application Number
11287249
Date Filed
November 28, 2005
Patent Primary Examiner
Patent abstract
An optical disc 10 includes a substrate. The substrate is formed by mixing polymethyl methacrylate and a polylactic acid-based resin composition. The polylactic acid-based resin composition contains polylactic acid-based resin in which the content of lactide is reduced to 1,000 ppm or less, and a mold release agent of 0.16 to 0.32 phr. The weight ratio of the polylactic acid-based resin to the polymethyl methacrylate is 70:30 to 50:50.
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