Granted Patent B2

US 8,399,080 · App. 12/202,655 · Granted Mar 19, 2013

Abstract

Claims (13)

1. 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 polyester core layer comprising high crystalline polyester and at least one amorphous copolyester skin layer;

a sealant layer adjacent to the amorphous copolyester skin 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 0.1 cc/100 sqin/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.

2. The balloon of claim 1 , wherein the sealant layer comprises a low density polyethylene.

3. The balloon of claim 1 , further comprising an anchor layer between the sealant layer and the amorphous copolyester skin layer.

4. The balloon of claim 1 , further comprising a primer layer between the biaxially oriented core layer and the gas barrier layer.

5. The balloon of claim 1 , wherein the biaxially oriented core layer is co-extruded with the amorphous copolyester skin layer.

6. The balloon of claim 1 , wherein the amorphous copolyester skin layer has a melting point of less than 210° C.

7. The balloon of claim 1 wherein, the amorphous copolyester skin layer contains no added particles.

8. The balloon of claim 1 , wherein the dry bonding strength of the gas barrier layer is more than 600 g/in.

9. The balloon of claim 1 , wherein the floating time of the balloon is more than about 30 days.

Assignments (28)