In-line, coated, biaxially oriented polypropylene film and method for the production thereof
AssigneeBrüCkner Maschinenbau GmbH & Co. KG
InventorsWilli Lindemann, Martin Wolf
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Abstract
The invention relates to a biaxially oriented polypropylene film (BOPP) comprising layers (A) to (D), wherein layers (B) to (D) contain biaxially oriented polypropylene and layer (A) contains polyurethane and nanoparticles and has a layer thickness of 25 to 300 nm, layer (B) contains polymers with functional groups that are capable of forming covalent bonds with polyurethane and is directly connected to layer (A), layer (C) has at least a layer thickness of 50% of the total thickness of the film, and layer (D) represents an outer layer of the film containing an anti-blocking agent. The invention also relates to a method for producing films of this type.
Claims18
A polypropylene film comprising 4 layers (A) to (D), which are arranged in order from (A) to (D), wherein layers (B) to (D) comprise biaxially oriented polypropylene and wherein
- layer (A) contains polyurethane and nanoparticles and has a layer thickness of 25 to 300 nm,
- layer (B) further contains polymers with functional groups that are capable of forming covalent bonds with polyurethane and is directly connected to layer (A),
- layer (C) has at least a layer thickness of 50% of the total thickness of the film, and
- layer (D) represents an outer layer of the film and comprises an anti-blocking agent.
Dependencies are inferred from the claim text.