Patent ID: 11873388
Assignee: OMYA INTERNATIONAL AG
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 6:
7. The mono or multi-layer polyester film of claim 1, wherein the at least one ground calcium carbonate-comprising filler material has
a) a weight median particle size d50 from 0.5 μm to 2.5 μm, and/or
b) a top cut particle size d98 of <15 μm, and/or
c) a fineness such that at least 15 wt.-% of all particles have a particle size of <0.5 μm, and/or
d) a specific surface area (BET) of from 0.5 to 150 m2/g, as measured using nitrogen and the BET method according to ISO 9277.