Flame retardant foam under layer having refined...

Details Flame retardant foam under layer having refined... Flame retardant foam under layer having refined...

H - Electricity

01

B

H01B 7/295 (2006.01)

Patent

CA 2435719

A flame and smoke retardant dual insulation design for insulated conductors in a telecommunication cable is disclosed. The insulation comprises an elongate substantially cylindrical fluoro-polymer outer layer and an under layer interposed between the conductor and the outer layer. The under layer includes a metallocene type polyolefin having PTFE micro-particles, a halogen type flame retardant package, clay based nanocomposite type particles and a light metal (Mg or Al) hydroxide, or any combination thereof. There is also disclosed a foam under layer for interposition between an electrical conductor and a cable jacket wherein the foam is fabricated from an exfoliated clay-based nanocomposite. During fabrication the exfoliated clay-based nanocomposite nucleates the foam under layer providing for the formation of micro-cells of less than 25µm.

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