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    • 2. 发明授权
    • Lens blank surface protection film
    • 镜片空白表面保护膜
    • US6149750A
    • 2000-11-21
    • US560315
    • 1995-11-17
    • William L. Parish, Jr.Phillip G. MartinPatrick D. Hyde
    • William L. Parish, Jr.Phillip G. MartinPatrick D. Hyde
    • B24B13/005B32B27/28C09J7/02C09J125/00C09J133/00B32B31/00
    • B24B13/0057C09J7/0246Y10T428/28
    • A conformable tape for bonding a lens block to ophthalmic lens blanks is provided. The tape comprises a polymeric backing and a pressure-sensitive adhesive. In a first preferred embodiment the surface of the backing is a blend of an olefin polymer with a polymer having acidic functionality. The blend may be formed as the backing layer, i.e., directly on the adhesive layer of the tape, or as the outer surface layer of a multilayered backing. In a second embodiment, the surface of the backing is a copolymer of an olefin monomer with a monomer having pendant acidic functionality. A lens block may be adhered to an ophthalmic lens blank by applying a section of the tape described above to an ophthalmic lens so that the pressure sensitive adhesive of the tape contacts the lens; conforming the tape to the compound surface of the lens; and attaching a lens block to at least a portion of the polymer backing layer. The tape may be made by extruding a polymeric backing material as described above; extruding a pressure-sensitive adhesive; and contacting the polymeric backing material and the pressure-sensitive adhesive. If desired, the polymeric backing material and the pressure sensitive adhesive may be coextruded to form the tape. In most preferred embodiments, the tape may be wound into a roll without a separate liner material.
    • 提供了一种用于将透镜块粘合到眼镜片坯料上的贴合带。 胶带包括聚合物背衬和压敏粘合剂。 在第一优选实施方案中,背衬的表面是烯烃聚合物与具有酸性官能团的聚合物的共混物。 共混物可以形成为背衬层,即直接位于带的粘合剂层上,或形成为多层背衬的外表面层。 在第二个实施方案中,背衬的表面是烯烃单体与具有酸性官能度侧基的单体的共聚物。 通过将上述带的一部分应用于眼科镜片,使得胶带的压敏粘合剂接触透镜,可以将透镜块粘附到眼镜片坯料上; 使胶带符合镜片的复合表面; 以及将透镜块附接到所述聚合物背衬层的至少一部分。 胶带可以通过如上所述挤出聚合物背衬材料制成; 挤出压敏粘合剂; 并使聚合物背衬材料和压敏粘合剂接触。 如果需要,聚合物背衬材料和压敏粘合剂可以共挤出以形成带。 在最优选的实施例中,带可以卷绕成卷而不用单独的衬垫材料。