Low temperature, aqueous ammonia treatment for polycarbonate sub

Details Low temperature, aqueous ammonia treatment for polycarbonate sub Low temperature, aqueous ammonia treatment for polycarbonate sub

1990-03-01

1992-04-07

Ryan, Patrick J.

Stock material or miscellaneous articles

Composite

Of polycarbonate

428409, 427163, 427164, B32B 900

Patent

active

051027399

ABSTRACT:
Provided is a method for preparing an optical information medium which comprises a polycarbonate substrate. A polycarbonate substrate is subjected to an aqueous ammonia solution treatment at a temperature below ambient temperatures and for an extended period of time. This treatment occurs prior to assembly of the optical information medium. Use of the treated polycarbonate substrate in the optical information medium results in the medium exhibiting a high level of performance over an extended useful life.

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