Method of making embossed oriented polymer films
Assignee3M Innovative Properties Company
InventorsJoan M. Strobel, Mark A. Strobel, Patrick J. Hager, Ronald S. Kapaun
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Abstract
Embossed oriented thermoplastic films and a method of making same are described. The embossed oriented thermoplastic films have substantially the same mechanical properties as unembossed oriented thermoplastic films. The method includes providing an oriented thermoplastic 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 oriented thermoplastic film, and cooling the embossed oriented thermoplastic film.
Claims19
A method of making an embossed oriented thermoplastic film comprising:
- providing an oriented thermoplastic 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 oriented thermoplastic film;
- cooling the embossed oriented thermoplastic film;
- wherein the tensile strength-at-break and tensile elongation-at-break of the embossed oriented thermoplastic film are substantially the same as the tensile strength-at-break and tensile elongation-at-break of the oriented thermoplastic film before embossing.
A method of making a thermoplastic article comprising:
- providing a layered construction comprising an oriented thermoplastic film having a major surface;
- softening the major surface to produce a softened surface;
- embossing the softened surface to produce an embossed layered construction;
- and
- cooling the embossed layered construction;
- wherein the tensile strength-at-break and tensile elongation-at-break of the oriented thermoplastic film in the embossed layered construction are substantially the same as the tensile strength-at-break and tensile elongation-at-break of the oriented thermoplastic film in the layered construction.
Dependencies are inferred from the claim text.