Antenna cover fabric for microwave transmissive emitters
AssigneeAlliedSignal Inc.
InventorsDouglas P. Merrill, Jr., Robert F. Hamilton
Life of this patent
Estimating the term…
Abstract
This invention relates to a fluoropolymer coated glass fabric having excellent flexibility, weatherability, ultraviolet light-stability, and moisture-resistance characteristics, which are suitable for protective cover applications, such as antenna cover.
Claims13
A coated glass fabric having improved flexibility, weatherability, ultraviolet light-stability, and moisture-resistance having coated thereon in sequence coating layers comprising:
- a first layer of a mixture of a perfluoropolymer and a silicone oil, said silicone oil comprising from about 5 to about 20 wt % based on the weight of the perfluoropolymer;
- a second layer of a perfluoropolymer;
- a third layer of a glass or mineral filled perfluoropolymer, said glass or mineral filler comprising from about 30 to about 60 wt % based on the weight of the "third layer" perfluoropolymer;
- a fourth layer of a titanium dioxide filled perfluoropolymer, said titanium dioxide comprising from about 30 to about 60 wt % based on the weight of the "fourth layer " perfluoropolymer;
- and
- a fifth layer of a titanium dioxide filled perfluoropolymer selected from the group consisting of fluorinated ethylene-propylene, perfluoroalkoxy and mixtures thereof, said titanium dioxide comprising from about 20 to about 40 wt % based on the weight of the fifth layer perfluoropolymer.
A coated glass fabric having improved flexibility, weatherability, ultraviolet light-stability, and moisture-resistance having coated thereon in sequence coating layers comprising:
- a first layer of a mixture of a perfluoropolymer and a silicone oil, said silicone oil comprising from about 5 to about 20 wt % based on the weight of the perfluoropolymer;
- a second layer of a perfluoropolymer;
- a third layer consisting essentially of a glass or mineral filled perfluoropolymer, said glass or mineral filler comprising from about 30 to about 60 wt % based on the weight of the "third layer " perfluoropolymer;
- a fourth layer consisting essentially of a titanium dioxide filled perfluoropolymer, said titanium dioxide comprising from about 30 to about 60 wt % based on the weight of the fourth layer perfluoropolymer;
- and
- a fifth layer consisting essentially of a titanium dioxide filled perfluoropolymer selected from the group consisting of fluorinated ethylene-propylene, perfluoroalkoxy and mixtures thereof, said titanium dioxide comprising from about 20 to about 40 wt % based on the weight of the fifth layer perfluoropolymer.
Dependencies are inferred from the claim text.