TREA

Optical Disc Using Methylmethacrylate-Acrylonitrile-Butadiene-Styrene Copolymer Resin

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Information

  • Patent Application
  • 20070224384
  • Publication Number
    20070224384
  • Date Filed
    March 14, 2007
    17 years ago
  • Date Published
    September 27, 2007
    17 years ago
Information
Abstract
An optical disc includes an active disc on which information is recorded and a dummy disc for protecting the active disc. The active disc and the dummy disc are bonded to form a single body, and the dummy disc is made of methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin.
Description

BRIEF DESCRIPTION OF THE DRAWINGS


FIG. 1 is a schematic diagram showing a structure of a double-layered optical disc including an active disc and a dummy disc.


Claims
  • 1. An optical disc comprising: an active disc on which information is recorded; anda dummy disc for protecting the active disc,
  • 2. The optical disc of claim 1, wherein said methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin comprises a rubber component having an average particle size of about 100 to about 350 nm.
  • 3. The optical disc of claim 1, wherein said methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin comprises a rubber component comprising polybutadiene or butadiene-styrene copolymer rubber.
  • 4. The optical disc of claim 1, wherein said methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin comprises about 53 to about 64% by weight of methylmethacrylate, about 3 to about 5% by weight of acrylonitrile, about 10 to about 30% by weight of polybutadiene, and about 14 to about 19% by weight of styrene.
  • 5. The optical disc of claim 1, wherein said methylmethacrylate-acrylonitrile-butadiene-styrene copolymer (MABS) resin comprises about 36 to about 47% by weight of methylmethacrylate, about 4 to about 7% by weight of acrylonitrile, about 10 to about 30% by weight of butadiene-styrene copolymer rubber, and about 30 to about 36% by weight of styrene.
  • 6. The optical disc of claim 1, further comprising: a recording surface formed on the active disc, anda reflective layer deposited onto the recording surface, wherein the dummy disc is bonded to the reflective layer.
  • 7. The optical disc of claim 6, wherein said dummy disc is bonded via an ultraviolet ray curing resin.
Priority Claims (2)
Number Date Country Kind
10-2006-0025828 Mar 2006 KR national
PCT/KR06/01977 May 2006 KR national