Method for dissociation of optical recording medium base plate and its film material

Abstract

The present invention discloses a method for dissociating optical recording medium base plate and its film material. The optical recording medium is placed in the electromagentic wave environment, the concentrated every of the electromagnetic wave can be used to break the film material layer of optical recording medium, and can make the film material layer absorb energy and quickly be separated from other layer so as to make the base plate material be separated from film material layer.

Description

technical field [0001] The present invention relates to a method for detaching an optical recording medium substrate and its thin film material. Background technique [0002] General optical recording media can be roughly classified into ROM optical discs, write-once optical discs, and rewritable optical discs according to their physical classification. Taking the ROM disc as an example, the known CD is one of the ROM discs, which is composed of a reflective layer and a protective layer sequentially plated on the substrate layer; as for the write-once disc, one of the known It is CD-R, which is composed of a recording layer, a reflective layer and a protective layer in sequence on the substrate layer; The layer consists of a dielectric layer, a recording layer, a dielectric layer, a reflective layer and a protective layer in sequence. [0003] Any of the above-mentioned existing optical disc products has a substrate layer and a thin film layer that constitute the main body...

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Problems solved by technology

However, the above-mentioned method uses chemicals, which easily lead to the regeneration of waste liquid and discharge pollution problems, and the mechanical method has the disadvantage of being unable to completely recycle and remake the optical disc substrate because it is easy to scratch the substrate; moreover, these The relevant equipment and methods in the previous case are expensive, bulky and difficult to operate, which are quite inconvenient, time-consuming and complicated

[0007] In addition, other methods of using chemicals to remove the thin film material layer and reclaim the substrate material have also been proposed, such as Japanese Patent No. 2615277 and Japanese Patent Application No. 8-164524; however, the processing methods described in these publications , it is easy to cause physical changes in the substrate material during the processing process, it is difficult to ensure the expected quality of the recycled substrate, and it will narrow the scope of recycled substrate materials, especially when it is desired to recycle the entire piece and re-use it as a substrate for optical discs , it is impossible to achieve this kind of reuse purpose at all, but it can only be recycled as engineering plastics with low economic value instead of applying its optical properties; in addition, the polycarbonate substrate treated by chemical solution is easy to Affected, it cannot be used in high-priced optical applications, and even affects its mechanical properties, reducing its reuse value, and the treatment of chemical waste solvents is another problem that is not easy to solve