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US 12,486,432 B2Granted
Composite films with an obscuration area
AssigneeKuraray Europe GmbH
InventorsUwe Keller, Martin Steuer, Shinichi Muguruma, Hideki Oomoto, Florian Mummy
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Abstract
The present invention relates to a composite film comprising a polyvinyl acetal with an obscuration area which is provided on a carrier film.
Claims11
A composite film comprising:
- a film A containing a polyvinyl acetal and optionally a plasticiser;
- and
- a carrier film,
- wherein film A is provided with an obscuration area,
- wherein the obscuration area is provided by a printed or coated ink layer on the surface of film A not facing the carrier film,
- wherein a surface roughness Rz of the surface of film A to be coated or printed is from 0.1 to 3.0 μm, measured before said surface is coated or printed on, and
- wherein a surface roughness Rz of the carrier film on the surface in contact with film A is from 2.0 to 6.0 μm, measured before the carrier film and the film A come into contact.
4 more elements
Dependencies are inferred from the claim text.