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US 2010/0062237 A1Published application
Sealable Polyester Film
AssigneeMitsubishi Polyester Film GmbH
InventorsMatthias Konrad, Bodo Kuhmann, Gottfried Hilkert
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Abstract
The invention relates to a transparent heatsealable biaxially oriented polyester film including a base layer B and amorphous top layers A on each surface of the base layer B. The invention further relates to a process for producing the film and to the use thereof.
Claims25
A multilayer biaxially oriented polyester film comprising a base layer B and at least one top layer A, wherein the top layer A
- a) has a thickness of 1 to 10 μm,
- b) comprises predominantly a copolyester containing 15 to 40 mol % of cyclohexane dimethylene terephthalate,
- c) contains more than 0.05% by weight of external particles, based on the total weight of the top layer A,
- the base layer B comprises
- polyester which includes from 0.1 to 5 mol % of 1,4-bismethylenecyclohexane,
- and the film
- i) has a seal seam strength to itself, PVC and metal after sealing of greater than 2 N/15 mm measured at 180° C., 4 bar, 0.5 s, and
- ii) a sliding friction of less than 0.5.
5 more elements
Dependencies are inferred from the claim text.