HIGHLY REFLECTIVE THERMOPLASTIC BODIES FOR INFRARED, VISIBLE OR ULTRAVIOLET LIGHT
First Claim
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2. The body of claim 1 having a reflective spectrum approaching that of a C color.
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Abstract
Highly reflective colored plastic film is prepared from transparent plastics having no pigment or inorganic material by forming the film from a number of layers of different thermoplastic materials which differ in refractive index and the layer thicknesses are from about 0.05 micron to about one micron.
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Citations
16 Claims
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2. The body of claim 1 having a reflective spectrum approaching that of a C color.
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3. The body of claim 1 wherein the body has a metallic appearance.
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4. The body of claim 1 whereby the layers of the first and second material vary in thickness.
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5. The body of claim 1 wherein the layers of the second material are arranged in a generally increasing thickness away from the first surface.
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6. The body of claim 1 wherein the plurality of layers are varied in thickness by stretching.
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7. The body of claim 6 wherein the materials are elastomeric in nature.
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8. The body of claim 1 wherein the first surface is adhered to a glass sheet.
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9. The body of claim 8 having a second surface adhered to a glass sheet.
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10. The body of claim 1 wherein the body has the form of a film and the film encloses a comestible.
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11. The body of claim 10 wherein the comestible is a meat.
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12. The body of claim 1 wherein the major reflection is in the infrared region.
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13. The body of claim 12 wherein the first surface is adhered to a substrate.
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14. The body of claim 13 wherein the substrate is paper.
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15. A highly reflective synthetic resinous thermoplastic film of at least first and second diverse transparent thermoplastic materials, the body having at least a first surface, the body comprising at least a total of fifty synthetic resinous thermoplastic layers of the first and second materials, each of the layers being transparent to at least infrared, visible or ultraviolet light, wherein the adjacent layers differ from each other in refractive index by at least 0.05 and the thickness of the layers is from about 0.05 micron to about one micron and the thickness of at least a portion of the first layer increases in a direction away from the first surface and the reflection spectRum of the layered film reaches a value of at least 40 percent within the region of infrared, visible or ultraviolet light, and the film is variable in thickness by stretching.
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16. The film of claim 15 wherein the components are elastomeric in nature.
Specification