Lighter than air balloons from laminates comprising bio-based polyester films and bio-based polyethylene films
AssigneeToray Plastics (America), Inc.
InventorsStefanos L. SAKELLARIDES, Keunsuk P. Chang
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Abstract
A balloon made from a laminate film including at least one bio-based polyester layer of at least about 19.0 pMC of radiocarbon (14C) content is disclosed. The laminate film could further have additional layers such as a second bio-based polyester resin-containing layer of at least about 21.5 pMC of radiocarbon (14C) content, a linear low density polyethylene bio-based resin-containing layer of at least about 94 pMC of radiocarbon (14C) content, a metal layer, or combinations thereof.
Claims30
A balloon formed from a lamination, the lamination comprising:
- a bio-based polyester film with a radio carbon content of at least 19 pMC.
A balloon formed from a lamination, the lamination comprising;
- a polyester film with a total thickness of 4 μm to 12 μm comprising a biaxially oriented core layer comprising a bio-based oriented polyester and at least one skin layer comprising amorphous copolyester;
- a sealant layer;
- and
- a gas barrier layer on an opposite side of the polyester film from the sealant layer, wherein an oxygen transmission rate of the balloon is less than 150 cc/m2/day, a dry bonding strength of the gas barrier layer to the surface of the polyester film is more than 300 g/in, a sealing strength of the balloon is more than 3.5 kg/in, and a floating time of the balloon is more than 20 days.
A method of making a balloon structure comprising:
- forming a lamination comprising co-extruding a core layer comprising a bio-based oriented polyester and at least one skin layer comprising amorphous copolyester to form a polyester film and applying a sealant to the polyester film;
- and
- forming a balloon structure from the lamination.
Dependencies are inferred from the claim text.