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US 11,752,729 B2Granted
Conformable color shifting laminates
Assignee3M Innovative Properties Company
InventorsHuiwen Tai, Joan M. Frankel, Stephen P. Maki, Diane North, Robert R. Owings
Life of this patent
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Abstract
A stretchable reflective color-shifting film comprises a stretchable transparent polymer layer; a semi-transmissive metal layer; a transparent spacer layer; a reflective metal layer; an adhesive layer; and a stretchable base film layer. When the film body is stretched by 25%, the peak total reflectance stretched is at 80% of the peak total reflectance when the film body is unstretched according to the Total Reflectivity Test.
Claims16
A stretchable reflective color-shifting film comprising:
- a stretchable transparent polymer layer;
- a semi-transmissive metal layer;
- a transparent spacer layer;
- a reflective metal layer;
- an adhesive layer;
- and
- a stretchable base film layer;
- wherein when the film body is stretched by 25%, the peak total reflectance when stretched is at 80% of the peak total reflectance when the film body is unstretched according to the Total Reflectivity Test, wherein when the film body is stretched by 25%, the peak specular reflection is at least 30% at a normal angle.
5 more elements
A stretchable reflective color-shifting film comprising:
- a stretchable transparent polymer layer;
- a semi-transmissive metal layer;
- a transparent spacer layer;
- a reflective metal layer;
- an adhesive layer;
- and
- a stretchable base film layer;
- wherein when the film body is stretched by 25%, the peak specular reflection is at least 30% at a normal angle.
5 more elements
Dependencies are inferred from the claim text.