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US 12,702,597 B2Granted
Digitally printed backsheet film
AssigneeRkw SE
InventorsRobert Koplin, Christoph Meier, Dennis Becker
Life of this patent
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Abstract
A breathable, polyolefinic, filled, stretched film. The film has a water vapor transmission rate of at least 500 g/m2 in 24 h according to ASTM D6701-01. The water column of the film is more than 300 mm according to EDANA WSP 80.6. The film has an imprint which is bonded to the film via an adhesive. The film has at least one layer in which the adhesive is integrated.
Claims12
A breathable film, comprising:
- a breathable, polyolefinic, filled, stretched film comprising more than 45% by weight fillers and an adhesive integrally formed therein, the film being formed by monaxial stretching as a layer and an imprint bonded thereon via the adhesive that is in the layer, the breathable film having a water vapor transmission rate of at least 500 g/m2 in 24 h according to ASTM D6701-01;
- and
- a water column of more than 300 mm according to EDANA WSP 80.6,
- wherein the adhesive includes an ethylene-vinyl acetate copolymer (EVA), a proportion of EVA in the layer being more than 5% by weight and less than 50% by weight, and the EVA has a vinyl acetate proportion of more than 20% by weight and less than 60% by weight.
1 more element
Dependencies are inferred from the claim text.