Releasable polyester metal transfer film
First Claim
1. A polyester carrier film for use in metal transfer applications having an outer surface, a thickness of about 4-75 μ
- m and at least one layer consisting essentially of a polyester and a release agent selected from the group consisting of anionic surfactant, non-ionic surfactant, about 0.1-1 wt % paraffin wax dispersed in the polyester, and a combination thereof, in which the release agent is present in a blend with the polyester 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, andin which concentration of anionic surfactant and non-ionic surfactant in the at least one layer is 0.01-3 wt %.
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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 a 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.
38 Citations
18 Claims
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1. A polyester carrier film for use in metal transfer applications having an outer surface, a thickness of about 4-75 μ
- m and at least one layer consisting essentially of a polyester and a release agent selected from the group consisting of anionic surfactant, non-ionic surfactant, about 0.1-1 wt % paraffin wax dispersed in the polyester, and a combination thereof, in which the release agent is present in a blend with the polyester 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
in which concentration of anionic surfactant and non-ionic surfactant in the at least one layer is 0.01-3 wt %. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- m and at least one layer consisting essentially of a polyester and a release agent selected from the group consisting of anionic surfactant, non-ionic surfactant, about 0.1-1 wt % paraffin wax dispersed in the polyester, and a combination thereof, in which the release agent is present in a blend with the polyester 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
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10. 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 polyester carrier film having a thickness of about 4-75 μ
m, and an outer surface, the polyester carrier film having at least one layer consisting essentially of a polyester and a release agent selected from the group consisting of anionic surfactant, non-ionic surfactant, about 0.1-1 wt % paraffin wax dispersed in the polyester, and a combination thereof, in which the release agent is present in a blend with the polyester 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 polyester carrier film from the metal layer, thereby transferring the metal layer to the substrate article. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A polyester carrier film for use in metal transfer applications having an outer surface, a thickness of about 4-75 μ
- m and at least one layer consisting essentially of a polyester and a release agent selected from the group consisting of anionic surfactant, non-ionic surfactant, and a combination thereof, in which the release agent is present in the at least one layer in concentration of 0.01-3 wt % in a blend with the polyester 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 (18)
Specification