Embossed optical polymer films
First Claim
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1. A method of making an embossed optical polymer film comprising:
- providing an optical polymer film having first and second major surfaces;
softening at least one of the first and second major surfaces to produce a softened surface by exposing it to a burner selected from a flame burner and a flameless radiant burner;
embossing the softened surface to produce an embossed optical polymer film; and
cooling the embossed optical polymer film, the process conditions of the flame power of the burner and the dwell time, during which the film is softened, embossed and cooled, being effective to yield a film for which the reflectance of a range of wavelengths is substantially the same before and after embossing.
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Abstract
A method of making embossed optical polymer films and embossed optical polymer films made are described. The embossed optical polymer films have substantially the same optical properties as unembossed optical polymer films. The method includes providing an optical polymer film having first and second major surfaces, softening at least one of the first and second major surfaces to produce a softened surface, embossing the softened surface to produce an embossed optical polymer film, and cooling the embossed optical polymer film.
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Citations
14 Claims
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1. A method of making an embossed optical polymer film comprising:
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providing an optical polymer film having first and second major surfaces; softening at least one of the first and second major surfaces to produce a softened surface by exposing it to a burner selected from a flame burner and a flameless radiant burner; embossing the softened surface to produce an embossed optical polymer film; and cooling the embossed optical polymer film, the process conditions of the flame power of the burner and the dwell time, during which the film is softened, embossed and cooled, being effective to yield a film for which the reflectance of a range of wavelengths is substantially the same before and after embossing. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making an optical polymer article comprising:
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providing a layered construction comprising a multilayered optical polymer film having a major surface; softening the major surface to produce a softened surface by exposing it to a burner selected from a flame burner and a flameless radiant burner; embossing the softened surface to produce an embossed layered construction; and cooling the embossed layered construction, the process conditions of the flame power of the burner and the dwell time, during which the film is softened, embossed, and cooled, being effective to yield a film for which the reflectance of a range of wavelengths is substantially the same before and after embossing. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method of making an embossed optical polymer film comprising:
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providing an optical polymer film having first and second major surfaces; softening at least one of the first and second major surfaces to produce a softened surface by exposing it to a burner selected from a flame burner and a flameless radiant burner; embossing the softened surface to produce an embossed optical polymer film; and cooling the embossed optical polymer film, the process conditions of the flame power of the burner and the dwell time, during which the film is softened, embossed and cooled, being effective to yield a film for which the transmission of a range of wavelengths is substantially the same before and after embossing.
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Specification