| 摘要 |
PROBLEM TO BE SOLVED: To provide a tacky tape for molding a plastic lens capable of molding, in high precision, a standardized plastic lens molding, of inhibiting the chipping or blanching of the outer circumferential surface of the molded molding and the generation of a tackifier residue, and of preparing, even after having been stored over an extended period, a molding having a favorable precision.SOLUTION: The tackifier layer of the provided tacky tape is constituted by a tackifier including a silicone tackifier as a main component, whereas the silicone tackifier is constituted by a tackifier including an alkenyl group-containing silicone tackifier and an alkenyl group-free silicone tackifier and obtained by mixing 50-70 parts.wt. of the alkenyl group-containing silicone tackifier, 30-50 parts.wt. of the alkenyl group-free silicone tackifier, and, with respect to the alkenyl group-containing silicone tackifier, 0.5-1.5 parts.wt. of the sum of a crosslinking agent and a catalyst, whereas the silicone tackifier is a tackifier provided by mixing, in terms of the constituent ratio of a polyorganosiloxane gum (G) and a silicone resin (R), 36-44 parts.wt. of the polyorganosiloxane gum (G) and 56-64 parts.wt. of the silicone resin (R), whereas the 70°C holding power of the tacky tape is 80 min or longer and 300 min or shorter, whereas the adhesive force thereof is 2.0 N/10 mm or above and 6.0 N/10 mm or below. |
