Transparent film made from PET and PEN with UV protection, process for producing the film, and use of the film in packaging with extended shelf life
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United States of America Patent
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Jul 3, 2007
Grant Date -
Dec 25, 2003
app pub date -
Jun 16, 2003
filing date -
Jun 20, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a polyester film with a thickness of from about 4 to about 23 .mu.m, which comprises, alongside polyethylene terephthalate as main constituent, from about 2 to about 20% by weight of polyethylene naphthalate (based on the weight of the film), and has fewer than 30 pinholes per 100 m.sup.2. The invention further relates to a process for producing these films, and to the use of the films in packaging composites.
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