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US 2024/0083151 A1Published application
Transparent polymer film with discoloration compensation
AssigneeKlöCkner Pentaplast GmbH
InventorsJochen MÜNSTER, Adrian WYSS
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Abstract
A single-layer or multilayer film formed from one or more polymeric materials has CIE colour values a* and b* such that −7≤a*≤0, −15≤b*≤0 and an optical transmission T such that 60%≤T≤95%. The inventive transparent films provide discoloration compensation that alleviates yellowing caused by UV light.
Claims19
A single-layer or multilayer transparent film comprising one or more polymeric materials and one or more dyes,
- wherein the film has CIE color values a* and b* of −7≤a*≤0 and −15≤b*≤0 and an optical transmission T of 60%≤T≤95%,
- wherein the film comprises a blister film produced by thermoforming,
- wherein the film comprises at least one supplementary dye, and
- wherein a ratio of an integrated absorption of the one or more dyes in a wavelength range from 520 to 600 nm to an integrated absorption of the at least one supplementary dye in the wavelength range from 520 to 600 nm is from 4:1 to 1:1.
1 more element
Dependencies are inferred from the claim text.