Conformable tape for bonding a thermoplastic lens blocking mater

Details Conformable tape for bonding a thermoplastic lens blocking mater Conformable tape for bonding a thermoplastic lens blocking mater

1996-09-13

1999-07-06

Davis, Jenna

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428355AC, C09J 702

Patent

active

059195630

ABSTRACT:
The present invention provides a conformable tape for bonding a lens block comprising a thermoplastic lens blocking composition to an ophthalmic lens blank. Preferred tapes have a pressure sensitive adhesive layer and a polymer backing that comprises a polar moiety and a non-polar moiety. Preferred thermoplastic lens blocking compositions comprise a homopolymer or copolymer of epsilon-caprolactone, have a number average molecular weight between 3,000 and 100,000, and a polydispersity less than 10. The composition may also comprise one or more modifiers, fillers or heat absorbing materials.

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