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US 12,264,243 B2Granted
Biaxially oriented formable polyester film
AssigneePolyplex Corporation Limited
InventorsPranay Kothari, Krishna Reddy
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Abstract
The present invention relates to a biaxially oriented formable polyester film having A/B/A layer structure and the process of preparing the same. The biaxially oriented formable polyester films exhibit improved Dart impact, elongation and formability comparable to nylon film which are used for thermoforming and cold forming applications.
Claims36
A biaxially oriented formable polyester film comprising
- layer A comprising a polyethylene terephthalate copolymer and inorganic filler silica having dosage of greater than 1000 to 3500 ppm;
- layer B comprising 90 to 60 wt. % polyethylene terephthalate copolymer and 10 to 40% recycled-PET;
- wherein layer B has a thickness of 75% to 85% of the total thickness of the film;
- wherein the film comprises two outer layers made of layer A, and each layer A has a thickness of 7.5% to 12.5% of the total thickness of the film;
- wherein the film has a thickness in the range of 8 to 300 micron;
- and
- wherein the film exhibits a dart impact of 150 gf or greater and puncture resistance of 4.0N or greater.
4 more elements
Dependencies are inferred from the claim text.