Patent ID: 11907447
Assignee: 3M INNOVATIVE PROPERTIES COMPANY
Field: Surface technology, coating (Chemistry)
Classification: CPC B  G | IPC B  G

Claim 7:
8. A polymeric film comprising a unitary layer having a structured first major surface comprising a plurality of randomly or pseudorandomly oriented intersecting extended structures protruding outwardly from the polymeric film, wherein for at least a majority of the structures in the plurality of extended structures:
each structure extends along a length of the structure, has an average width along a direction transverse to the length and generally along the first major surface, and has an average height along a direction generally perpendicular to the first major surface; and
the average width of the structure is in a range of 1 to 200 micrometers, the average height of the structure is in a range of 1 to 200 micrometers, and the length is at least 3 times the average width,
wherein a distribution of orientation of the structures as a function of an angle of orientation of the structures is constant or has minimum and maximum values such that the minimum value is not less than 0.2 times the maximum value.