Method for manufacturing optical disk formed of single disk, and four-layer adhered sheet body and wound body of the sheet body used for the method

A method for manufacturing optical disc characterized in that a four layered adhesive sheet member (1) is composed of an elongated release paper (1A), a protective sheet (1B) temporarily attached to the elongated release paper, an adhesive layer formed on the protective sheet, a release paper temporarily attached to the adhesive layer, and in that the release paper is peeled from the four layered adhesive sheet member to expose the adhesive (1C), a three layered adhesive sheet from which the release sheet is released is adapted to abut against the surface of the single layered disc to transport and bond the surface of the single layered disc, and in that the elongated release paper is released from the protective sheet bonded to the single layered disc to thereby expose the protective sheet on the single layered disc.

A method for manufacturing optical disc characterized in that the adhesive layer (1C) is exposed by releasing the release paper from the four layered adhesive sheet member (1) which is composed of an elongated release paper (1A), a protective sheet (1B) temporarily attached to the elongated release paper, an adhesive layer on the protective sheet, a release paper temporarily adhesive to the adhesive layer, and in that the release paper is released from the four layered adhesive sheet to abut against the surface of the single layered disc to transport and bond the surface of the single layered disc through the adhesive layer, and wherein the elongated release paper is released from the protective sheet bonded to the single layered disc to thereby expose the protective sheet on the single layered disc and thereafter, the single layered disc (2) is pressured by an atmosphere of an air pressure to eliminate air bubbles.

A four layered adhesive sheet member (1) which is employed when the optical disc is manufactured characterized in that said four layered adhesive sheet member comprises an elongated release paper (1A), a protective sheet adapted to longitudinally, temporarily adhere to the elongated release paper at regular intervals, an adhesive layer formed on the protective sheet, and a release paper adapted to temporarily adhere to the adhesive layer, and that an opening is bored through the four layered adhesive sheet.

A roll member (X) formed by winding the four layered adhesive sheet member (1) used for manufacturing the optical disc (D) into a cylinder in a mandrel form which is employed when the optical disc is manufactured characterized in that said four layered adhesive sheet member (1) comprises an elongated release paper, a protective sheet adapted to longitudinally, temporarily adhere to the elongated release paper (1A) at regular intervals, an adhesive layer formed on the protective sheet, and a release paper adapted to temporarily adhere to the an adhesive layer, and in that an opening is bored through the four layered adhesive sheet.