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US 8,409,720 B2Granted
Optical body having polyacrylate skin layer
Assignee3M Innovative Properties Company
InventorsTimothy J. Hebrink, Stephen A. Johnson, Kristopher J. Derks, Kevin M. Hamer
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Abstract
A multilayer optical body is disclosed. The optical body includes an optical film including polyester, a first skin layer is disposed on at least one side of the polyester optical film, and a strippable skin layer is disposed on the first skin layer. The first skin layer includes a mixture of a polyacrylate and a second polymer. Methods of making such optical bodies are also disclosed.
Claims14
An optical body, comprising:
- an optical film comprising polyester, the optical film comprising alternating first and second optical layers, the first and second optical layers comprising polyesters;
- a first extruded skin layer disposed on a first side of the optical film, the first extruded skin layer comprising a mixture of a polyacrylate and a second polymer, wherein the second polymer is not miscible in the polyacrylate and has a refractive index of from 1.45 to 1.53;
- and
- a first extruded strippable skin layer disposed on the first extruded skin layer;
- wherein the first extruded skin layer, when exposed by removal of the first extruded strippable skin layer, is adapted to avoid adhesion to a glass surface and assists the optical body to resist warping.
2 more elements
Dependencies are inferred from the claim text.