| 摘要 |
<p>Provided is an adhesive tape for molding plastic lens by which standardized molded article of plastic lens may be molded with good degree of precision, the generation of scratches, whitening, adhesive residue on the outer surface of the molded article may be prevented, and the degree of precision is good after storing for a long time. An adhesive layer is composed of an adhesive agent including a silicon adhesive agent as a main component. The silicon adhesive agent includes a silicon adhesive agent containing an alkenyl group and a silicon adhesive not containing the alkenyl group, and is composed of 50-70 parts by weight of the silicon adhesive agent containing the alkenyl group, 30-50 parts by weight of the silicon adhesive agent not containing the alkenyl group, 0.5-1.5 parts by weight of a cross-linking agent and a catalyst with respect to the amount of the silicon adhesive agent containing the alkenyl group. In the silicon adhesive, a polyoragano siloxane gum (G) and a silicon resin (R) are mixed so that the constituting ratio is 36-44 parts by weight of the polyorgano siloxane gum (G) and 56-64 parts by weight of the silicon resin (R). The retentiveness of the adhesive tape at 70°C is at least 80 minutes, the adhesiveness thereof is at least 2.0 N/10 mm and at most 6.0 N/10 mm.</p> |
