Multilayer polymer film with additional coatings or layers
First Claim
1. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its mechanical properties, said mechanical properties differing from mechanical properties of said layers of said optical stack.
2 Assignments
0 Petitions
Accused Products
Abstract
A multilayer polymer film has an optical stack including a plurality of alternating polymer layers with skin layers having mechanical, optical, or chemical properties differing from those of the layers in the optical stack, wherein the refractive indices in the in-plane direction nx and ny, and the refractive index in the thickness direction nz for each layer are all selected to obtain optical effects such as reflection, transmission, and/or polarization.
482 Citations
27 Claims
- 1. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its mechanical properties, said mechanical properties differing from mechanical properties of said layers of said optical stack.
- 7. A multilayer optical film having layers of first and second polymers, said first and second polymers differing in composition, each of said layers having a thickness of no more than 0.5 microns, said layers of said first polymer having indices of refraction of n1x and n1y in planes of said layers of said first polymer and n1z normal to said planes of said layers of said first polymer and said layers of said second polymer having indices of refraction of n2x, and n2y in planes of said layers of said second polymer and n2z normal to said planes of said layers of said second polymer layer all of said indices of refraction being selected to provide desired optical properties, said optical stack having first and second major surfaces, said first major surface having adhered thereto a first tear resistant layer.
- 15. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its chemical properties, said chemical properties differing from chemical properties of said layers of said optical stack.
- 17. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its optical properties, said optical properties differing from optical properties of said layers of said optical stack.
-
24. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a pressure sensitive adhesive.
- 25. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction n and ny in a plane of said layer and n normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its mechanical properties, said mechanical properties differing from mechanical properties of said layers of said optical stack wherein said additional layer is a tear resistant layer in the range of 5 percent to 60 percent of the thickness of said optical stack has a composition that is the same as the composition of said second polymer.
-
27. A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction'"'"'s unstretched dimension, said optical stack having first and second major surfaces, each of said layers having indices of refraction nx and ny in a plane of said layer and nz normal to a plane of said layer all of said indices of refraction being selected to provide desired optical properties, said film further comprising a first additional layer adhered to said first major surface, said additional layer being of a material selected for its mechanical properties, said mechanical properties differing from mechanical properties of said layers of said optical stack wherein said additional layer is glass.
Specification