Technical note · PVC cable materials

How to select PVC sheathing compound for an LV cable jacket

A cable-jacket compound should be matched to the cable design and the extrusion line—not chosen from hardness alone. The right starting brief makes sampling faster and avoids a mismatch between pellets, processing and finished-cable performance.

Jinhong Polymer · Guangdong, China · 10 July 2026

Start with the cable, not a generic material name

“PVC cable compound” is a broad description. Before asking for a quote or trial material, define whether the compound is for an outer jacket, a flexible cord or another cable layer. The cable construction, conductor size, insulation system, jacket thickness and intended market all affect the formulation discussion.

Check the properties as a package

Hardness is only one part of the decision. For a flexible jacket, buyers normally need to consider density, tensile strength, elongation, surface appearance and processing stability together. A compound that feels correct by hand can still run poorly on a line or produce an unsuitable finished jacket if the rest of the specification is missing.

For flame-retardant cable work, the requested test method and cable structure should be confirmed before a grade is described as suitable. Material targets and a finished-cable result are not interchangeable: the final result depends on the full cable design and the applicable test.

Use a controlled sample route

Send the current material sample, cable photo, datasheet or target values where possible. A practical trial sequence is: confirm the brief, prepare a sample lot, run it on the buyer’s line, then adjust hardness, color, surface or processing behavior before a small batch. This gives both sides a clear reference before a larger order.