Ophthalmic blocking pad
First Claim
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1. An ophthalmic blocking pad comprising:
- a foam layer having a density of 25 lb/ft3 to 40 lb/ft3,a film layer disposed over and directly contacting the foam layer, the film layer having a tensile strength of at least about 25 ksi (172 MPa); and
an adhesive layer disposed over the film layer, wherein the adhesive layer exhibits a peel adhesion of at least 4.0 lb/in (0.70 N/mm) on polyethylene;
wherein the ophthalmic blocking pad has a torque performance of at least 20 in-lb.
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Abstract
An ophthalmic blocking pad includes a foam layer, a film layer disposed over and directly contacting the foam layer, and an adhesive layer disposed over the film layer. The film layer has a tensile strength of at least about 25 ksi (172 MPa).
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Citations
21 Claims
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1. An ophthalmic blocking pad comprising:
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a foam layer having a density of 25 lb/ft3 to 40 lb/ft3, a film layer disposed over and directly contacting the foam layer, the film layer having a tensile strength of at least about 25 ksi (172 MPa); and an adhesive layer disposed over the film layer, wherein the adhesive layer exhibits a peel adhesion of at least 4.0 lb/in (0.70 N/mm) on polyethylene; wherein the ophthalmic blocking pad has a torque performance of at least 20 in-lb. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An ophthalmic blocking pad comprising:
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a foam layer having a density in a range of 25 lb/ft3 to 40 lb/ft3; a film layer in direct contact with the foam layer, the film layer having a tensile strength of at least about 25 ksi (172 MPa); and an adhesive layer configured to exhibit a peel adhesion of at least about 4.0 lb/in (0.70 N/mm) on polypropylene; wherein the ophthalmic blocking pad has a torque performance of at least 22 in-lb.
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20. An ophthalmic blocking article comprising:
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a first release liner forming a continuous sheet; and a plurality of ophthalmic blocking structures disposed on the first release liner, each ophthalmic blocking structure of the plurality of blocking structures comprising; a first adhesive layer in contact with the first release liner; a foam layer disposed over the first adhesive layer, the foam layer having a density in a range of 25 lb/ft3 to 40 lb/ft3; a second adhesive layer disposed over the foam layer; and a film layer disposed between at least one of the first and second adhesive layers and the foam layer and directly contacting the foam layer, the film layer having a tensile strength of at least about 25 ksi (172 MPa); wherein at least one of the first or second adhesive layers exhibits a peel adhesion of at least 4.0 lb/in (0.70 N/mm) on polyethylene; wherein each ophthalmic blocking structure has a torque performance of at least 20 in-lb. - View Dependent Claims (21)
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Specification