电缆绝缘PVC混料供应商

PVC cable compounds are formulated from PVC resin, plasticisers, heat stabilisers, fillers, and processing aids. The compound formulation determines the key performance properties. Temperature rating: standard cable-grade PVC insulation is rated to 70°C (or 75°C, designated T2 under IEC 60227). Heat-resistant grades are rated to 90°C (HR or T3); special grades up to 105°C. Higher temperature ratings require more thermally stable plasticisers and heat stabilisers. Flexibility and Shore hardness: building wire insulation typically uses a hard compound with Shore D hardness of 70–85. Flexible cord (appliance leads, extension cables) requires a soft compound with Shore A hardness of 55–75. Flexible grades require higher plasticiser loading. Plasticiser type: DINP (diisononyl phthalate) and DIDP (diisodecyl phthalate) are the standard non-restricted plasticisers for cable applications. DEHP, DBP, BBP, and DIBP are restricted under EU REACH and RoHS for cables destined for the EU market — always confirm the plasticiser system with the compound supplier. Lead stabilisers: historically common in cable PVC but banned in EU cables under RoHS Directive 2011/65/EU since 2013. Confirm the compound uses a calcium-zinc (Ca-Zn) or organic tin stabiliser system for EU-market cables.

Cable PVC compounds destined for cables sold in the EU or UK must comply with: RoHS Directive 2011/65/EU (and its amendment 2015/863/EU) — restricting lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium (Cr VI), and four phthalates (DEHP, BBP, DBP, DIBP) in electrical and electronic equipment; REACH Regulation — restricting SVHCs including specific phthalates at above 0.1% w/w in articles. Request a written RoHS compliance declaration from the compound supplier confirming the compound does not contain restricted substances above maximum concentration values. For cables sold in California, verify Proposition 65 compliance for lead and other listed substances. CPR (Construction Products Regulation) in the EU classifies cables sold into construction by fire performance — cable PVC compounds used in CPR-regulated cables must be formulated to achieve the required reaction-to-fire classification (typically Eca, Dca, or Cca).

When evaluating cable-grade PVC compound suppliers, request: CoA confirming Shore hardness, tensile strength and elongation at break (per IEC 60811), volume resistivity, heat ageing data, and temperature rating; RoHS and REACH compliance declarations; the plasticiser and stabiliser system identity; and IEC 60227 or IEC 60245 material type designation matching the compound grade. Request a small trial quantity (25–50kg) for processing trials on your cable extrusion line before placing a container order. Key processing parameters to confirm are extrusion temperature profile, screw speed, and die pressure. China is the dominant source for standard cable-grade PVC compounds for export. European producers (Kem One, Vinnolit, Mexichem/Vestolit) serve premium grades and supply chain-sensitive EU cable manufacturers. For African and Middle Eastern cable manufacturers, Chinese compounds are the primary cost-competitive option.