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PVC Cable Compounds

Depending on requirements, cable insulation mass by Avighna Enterprises compunding systems utilizes various different plastics. They include polyolefin, TPE, PPE, EEFE, PVA, and of course soft PVC compounds. PVC has been used for cable insulation, originally as a replacement for rubber. Due to their relatively high dielectric strength, leading to corresponding induction losses and heating, soft PVC cable insulation compounds are only used at AC voltages of up to 10 kV. Most soft PVC cable mass applications are in this field. Formulations can be adjusted to customize the application temperature range, mechanical characteristics and flexibility of use, flammability and processing.

PVC cable mass is usually compounded in two stages: hot/cold mixing in the powder phase, followed by compounding and pelletizing on a Avighna Enterprises Co-Kneader.

Compounding requirements can be summarized as follows. The plasticizers and other constituents like stabilizers, additives, fillers, reinforcements, flame retardants and others. are absorbed in the porous PVC grain and then must be systematically gelled, dispersively and distributively mixed, and agglomerated. This is all in compliance with well defined temperature limits. Custom-tailored property profiles lead to a wide variety of formulations, with efficient production in rather decreasing batch sizes.

In most cases all product variations can be covered with a universal shaft geometry designed to suit the formulations portfolio. Furthermore, the modularity of the entire system (shaft geometry, fittings, forming options, etc.) always enables adjustment to comply with different requirements. This is important for maximum security of investment.