Method of manufacturing chain extended foam insulation coaxial cable
View Patent ↗A method for manufacturing a coaxial cable werein a polymer is irradiated and extruded around a metallic inner conductor and the polymer is then surrounded with a metallic outer conductor. The irradiated polymer may be irradiated, for example, via electron beam, for example, between 0.25 and 4 MRad.
1. A method for manufacturing a coaxial cable, comprising the steps of:
irradiating a polymer;
extruding the polymer around an inner conductor; and
surrounding the foamed polymer with an outer conductor.
2. The method of claim 1 , wherein the irradiating is via exposing the polymer to an electron beam.
3. The method of claim 1 , wherein the irradiating is between 0.25 and 4 Mrad.
4. The method of claim 1 , wherein the polymer is high density polyethylene.
5. The method of claim 1 , wherein the polymer is a per-fluoropolymer.
6. The method of claim 1 , wherein the irradiation is applied until the polymer is chain extended.
7. The method of claim 1 , wherein the irradiation is performed upon the polymer while in pellet form.
8. The method of claim 1 , wherein the irradiation is performed upon the polymer while in pellet form while the polymer is heated above a glass transition temperature.
9. The method of claim 1 , wherein the extrusion is performed without addition of a secondary gas.
10. A method for manufacturing a coaxial cable, comprising the steps of:
irradiating pellets of a polymer until the polymer is chain extended;
extruding the polymer around an inner conductor; and
surrounding the extruded polymer with an outer conductor.
11. The method of claim 10 , wherein the irradiation is between 0.25 and 4 MRad, via an electron beam.
12. The method of claim 10 , wherein the extrusion is performed without addition of a secondary gas.
13. The method of claim 10 , wherein the polymer is high density polyethylene.
14. The method of claim 10 , wherein the polymer is a per-fluoropolymer.