PVDF/PVC alloys for plenum cable applications
A cable jacket includes an extruded polymer made from PVDF, PVC and a compatibilizing agent, where a ratio of PVDF, PVC and a compatibilizing agent is substantially 7:3:1.
1. A cable jacket comprising:
an extruded polymer blend made from:
PVDF;
PVC; and
a compatibilizing agent, said compatibilizing agent improving the compatibility between the PVDF and PVC,
wherein said compatibilizing agent is added to said PVDF and said PVC in a ratio of PVDF to PVC to said compatibilizing agent of substantially 7:3:1, and in an amount sufficient to reduce the cold temperature brittleness relative to a similarly composed PVDF/PVC polymer blend without said compatibilizing agent.
2. The cable jacket of claim 1 wherein the level of PVDF is substantially 63.3%, the level of PVC is substantially 27.3%, and the level of compatibilizing agent is substantially 9.1%.
3. The cable jacket of claim 1 wherein the ratio of PVDF, PVC, and said compatibilizing agent is such that said polymer maintains a Low Temperature Breaking value of <10° C. under ASTM D 746 testing.
4. The cable jacket of claim 1 wherein said extruded polymer blend retains at least 85% rating of strain at break, modulus and tensile rating after 60 days in oil under UL Oil Res II testing,
5. The cable jacket of claim 1 wherein the extruded polymer blend is extruded as tape, which is applied as said cable jacket.
6. The cable jacket of claim 5 wherein said tape exhibits a strength and strain at break of at least at 2800 psi and 280% respectively.
7. The cable jacket of claim 1 , wherein said compatibilzing agent is an E/nBA/CO=ethylene/n-butyl acrylate/carbon monoxide.
8. The cable jacket of claim 1 , wherein said extruded polymer blend has a smoke evolution of substantially 500 TSR m 2 /m 2 when tested as a 100 mm×100 mm ×3 mm plaque in the cone calorimeter at a heat flux of 100 kW/m 2 .
9. A cable jacket comprising:
an extruded polymer blend made from PVDF, PVC and an E/nBA/CO=ethylene/n-butyl acrylate/carbon monoxide compatibilizing agent,
wherein a ratio of PVDF, PVC and a compatibilizing agent is substantially 7:3:1, and
wherein said compatibilizing, a eat is added to said PVDF and said PVC in an amount sufficient to reduce the cold temperature brittleness relative to a similarly composed PVDF/PVC polymer blend without said compatibilizing agent.