Abstract: An antenna cover for an antenna of an aircraft includes a thermal barrier having an aerogel blanket having a shape of the antenna cover. The aerogel blanket has an inner side and an outer side with edges therebetween. The inner side is configured to face the antenna. The antenna cover includes a cover layer applied to the aerogel blanket. The cover layer includes at least one polytetrafluoroethylene (PTFE) sheet being a structurally reinforcing layer affixed to the outer side of the aerogel blanket to provide rigidity to the aerogel blanket.

Abstract: A thermal barrier for an electronic component includes an aerogel blanket configured to cover at least a portion of the electronic component and a cover positioned between the aerogel blanket and the electronic component. The aerogel blanket has a top, a bottom and edges therebetween. The bottom is configured to face the electronic component. The cover is a structurally reinforcing fabric affixed to the bottom of the aerogel blanket. The cover inhibits dust migration from the aerogel blanket toward the electronic component.

Abstract: Polymeric compositions which contain a thermoplastic aromatic polyester, preferably polybutylene terephthalate, and a polyester block copolymer having a recrystallization temperature greater than 150.degree. C., preferably a thermoplastic elastomer containing aromatic polyester blocks and aliphatic polyester blocks. The ratio of the block copolymer to the aromatic polyester is 0.05:1 to 0.35:1, preferably 0.15:1 to 0.30:1. These compositions are particularly useful as the insulation on hermetic lead wires for use in refrigerant systems. To prevent cracking of such insulation when it is contacted by a varnish used to provide hermetic sealing, it can be covered by a thin layer of a fluoropolymer.