Stock material or miscellaneous articles – Composite – Of polyester
Reexamination Certificate
2005-07-12
2005-07-12
Chen, Vivian (Department: 1773)
Stock material or miscellaneous articles
Composite
Of polyester
C428S483000, C428S910000, C525S165000, C525S173000, C525S174000, C525S177000, C264S288400, C264S290200
Reexamination Certificate
active
06916548
ABSTRACT:
The invention relates to biaxially orientated, co-extruded polyester films, which have at least one base layer that contains a thermoplastic polyester, preferably polyethylene terephthalate and approx. 2 to 60 wt.-% of a cycloolefin copolymer that is preferably composed of norbornene and ethylene units and which have at least one cover layer that is devoid of a COC and which optionally have additional cover or intermediate layers and can contain conventional additives such as stabilisers and anti-blocking agents. Said films are characterized in particular by a degree of whiteness>70%, an opacity>55% and a gloss, (at least on one side)>100 and are therefore suitable for numerous industrial applications. During the production of the films in accordance with the co-extrusion process, up to 70 wt.-% of reclaimed product can be used, without having a noticeable negative effect on the physical properties of the film.
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Bennett Cynthia
Kern Ulrich
Murschall Ursula
Peiffer Herbert
Chen Vivian
Mitsubishi Polyester Film GmbH
ProPat L.L.C.
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