Adhesive tape and edging method using same

Abstract

An adhesive tape which is to be arranged between a lens and at least one of a plurality of chucks in an edge-machining apparatus comprises an adhesive face for being in contact with the lens. A measurement of an adhesive strength of the adhesive face is 4 gf (0.0392 N) or more when a polyethylene terephthalate plate which has been subjected to a surface treatment with a fluorine-modified silicone parting agent is used as a test plate in an adhesive strength test method based on a 180°-peeling method as defined in JIS Z 0237 “adhesive tape/adhesive sheet test method”. A technique which can be used to edge the lens in which an antifouling layer is formed by using a fluorine-containing silane compound having an excellent antifouling effect is also provided.

1 . An adhesive tape which is provided between a lens and at least one of a plurality of chucks in an edge-machining apparatus, comprising an adhesive face for being in contact with the lens and having a measurement value of an adhesive strength of the adhesive face being 4 gf (0.0392 N) or more when a polyethylene terephthalate plate which has been subjected to a surface treatment with a fluorine-modified silicone parting agent is used as a test plate in an adhesive strength test method based on a 180°-peeling method as defined in JIS Z 0237 “adhesive tape/adhesive sheet test method”.  
   
   
       2 . The adhesive tape as set forth in  claim 1 , wherein a bored-through hole is provided in the central portion of adhesive tape.