Safety window film including polyurethane
Assignee3M Innovative Properties Company
InventorsLesbia Giron, Keith Lyon, Jay Jennen, Zoong Yang
Life of this patent
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Abstract
Safety window films are described. In particular, safety window films including a substrate including polyurethane—the substrate having a first and second major surface, an optically clear pressure sensitive adhesive, and a polymeric liner are described. The first major surface of the substrate is the top surface of the safety film, and the polyurethane has a Shore hardness of less than 80 D. Such films may provide improved physical and optical performance over conventional safety window films, while being easier to install.
Claims10
A safety film, comprising:
- a substrate comprising polyurethane, the substrate having a first and second major surface;
- an optically clear pressure sensitive adhesive;
- and
- a polymeric liner;
- wherein the first major surface of the substrate is the top surface of the safety film;
- wherein the polyurethane has a Shore hardness of less than 80 D.
A shatter-resistant window, comprising:
- at least one pane of glass, the at least one pane of glass defining an interior surface and an exterior surface;
- a safety film laminated to the interior or exterior surface of the at least one pane of glass, the safety film including a substrate comprising polyurethane having a Shore hardness of less than 80 D, and an optically clear pressure sensitive adhesive, the substrate having a first and second major surface;
- wherein the major surface further from the surface of the at least one pane of glass is the top surface of the safety film.
Dependencies are inferred from the claim text.