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Primary Extrusion
Kemcor's primary extrusion lines are closed loop vector computer controlled and SPC enabled for superior process control. We extrude a broad range of thermoplastics over many strand sizes, from 2 AWG to 30 AWG. Insulation options include PVC, polyethylene, polypropylene, TPE, and others.
PVC compounds have high dielectric strength and insulation resistance. They are inherently tough, and abrasion and moisture resistant. Pvc has outstanding resistance to ozone, acids, alcohols, oils, greases and gasoline.
PVC's main disadvantages as a primary insulation are its high capacitive and loss properties and its stiffness at lower temperatures. They are not recommended for uses which require flexing at temperatures below -40C.
Polyethylene has excellent insulation resistance and high dielectric strength. It also has outstanding resistance to acids, alkalis and most organic acids. It is a strong barrier to water, gasses and liquid vapors.
Polyethylene's disadvantages are its stiffness and its poor resistance to ultraviolet light.
Polypropylene, like polyethylene, is a member of the alkene family and as may be expected, the two have many similar properties. Polypropylene has the advantages of polyethylene - good heat, abrasion, moisture and chemical resistance - but each of these to a greater degree. It coefficient of friction is similar to that of nylon and it is highly resistant to environmental stress cracking.
Polypropylene's disadvantages are similar to those of polyethylene's.
TPE, or thermoplastic elastomer, has excellent electrical properties and low temperature flexibilities. Flame retardant varieties are available but are not currently RoHS compliant.
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