Releasable Polyester Metal Transfer Film
First Claim
1. A film for use in metal transfer applications having an outer surface and a thickness of about 4-75 μ
- m comprising a base layer consisting essentially of a blend of a polyester and a release agent in which the release agent is uniformly distributed on the outer surface in amount effective to provide the outer surface with a preselected adhesion value to a metal in the range of about 1-100 g/in measured by a 180 degree ethylene acrylic acid polymer peel test.
1 Assignment
0 Petitions
Accused Products
Abstract
A carrier film of thermoplastic polyester has releasable metal adhesive properties suitable for a metal transfer in which the polyester film is metalized and the metal layer is subsequently transferred to a permanent adhesive-coated substrate. The metal layer is in direct contact with the polyester carrier film and no intermediate release layer is present. Desired metal adhesion is provided by dispersing an suitable surfactant, and optionally, a hydrocarbon wax, uniformly into the polyester film. Surfactant on the outer surface of the carrier film modifies metal adhesion to the polyester such that the metal can be removed in a metal transfer operation.
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Citations
21 Claims
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1. A film for use in metal transfer applications having an outer surface and a thickness of about 4-75 μ
- m comprising a base layer consisting essentially of a blend of a polyester and a release agent in which the release agent is uniformly distributed on the outer surface in amount effective to provide the outer surface with a preselected adhesion value to a metal in the range of about 1-100 g/in measured by a 180 degree ethylene acrylic acid polymer peel test.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13)
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12. The film of 11 in which every layer of the film consists essentially of polyester.
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14. A method of transferring metal to a substrate comprising the steps of:
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(A) providing a metal transfer film consisting of (i) a carrier film having a thickness of about 4-75 μ
m, and an outer surface, the carrier film comprising a base layer consisting essentially of a blend of a polyester and a release agent in which the release agent is uniformly distributed on the outer surface in amount effective to provide the outer surface with a preselected adhesion value to a metal in the range of about 1-100 g/in measured by a 180 degree ethylene acrylic acid polymer peel test, and (ii) a transferable layer of the metal deposited in direct contact with the outer surface, the transferable layer having a metal thickness equivalent to an optical density in the range of about 0.2-4.0,(B) providing a substrate article having a surface coated with an adhesive layer, (C) contacting the transferable layer of the metal transfer film with the adhesive layer of the substrate article such that the metal transfer film bonds to the adhesive layer of the substrate article, and (D) stripping the carrier film from the metal layer, thereby transferring the metal layer to the substrate article. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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Specification