Patent ID: 11881329
Assignee: AMERICAN FIRE WIRE, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of manufacturing a fire resistant coaxial cable, the method comprising:
injecting an inert gas into a polymer in order to create a polymer foam;
extruding the polymer foam over a center conductor to form a foam dielectric layer;
extruding a first layer of ceramifiable silicone rubber over the foam dielectric layer to form a ceramifiable silicone dielectric layer, the ceramifiable silicone rubber comprising inorganic flux particles and refractory particles in a polysiloxane matrix, the ceramifiable silicone rubber configured to convert from a resilient elastomer to a porous ceramic when heated above 1010° C.;
encasing the ceramifiable silicone dielectric layer with an outer conductor; and
extruding a second layer of ceramifiable silicone rubber over the outer conductor to form a ceramifiable silicone jacket layer.