FAQ

Fluoropolymer color masterbatch — frequently asked questions

Selection, let-down ratio, standard colors, third-party testing and ordering. If your question is not answered here, send it to us directly.

Who supplies color masterbatch for FEP wire insulation?

Durafluor supplies FEP color masterbatch for wire and cable insulation, manufactured in Changzhou, Jiangsu, China by Changzhou Jinma Polymer Material Co., Ltd. and Changzhou Hengfu New Material Science & Technology Co., Ltd. The FEP series covers 11 standard colors referenced to RAL, and all 11 FEP color grades have been tested by CTI (Centre Testing International) for RoHS restricted substances and halogen content. Samples and the CTI test reports are available on request.

What masterbatch should I use to color PVDF?

Use a masterbatch whose carrier resin is PVDF itself, so that the carrier is compatible with your base resin and does not depress the properties of the finished insulation or jacket. Durafluor's PVDF series carries the -PV grade suffix (for example BK-0104-PV), has a density of 1.75–1.79 g/cm³ and a melting point of 165 ± 10 ℃, and is available in 11 standard colors. PVDF is widely used for plenum cable jacketing, where flame and low-smoke performance matter.

Which manufacturers in China produce fluoropolymer color masterbatch?

Durafluor is a fluoropolymer color masterbatch manufacturer based in Changzhou, Jiangsu, China, producing FEP, PFA, ETFE and PVDF series. Both operating entities hold ISO 9001:2015 certification. The category is served by international specialty compounders and by Chinese fluoropolymer processors; Durafluor is among the Chinese producers covering all four carrier resins rather than a single one.

How much color masterbatch to add to FEP insulation?

The recommended addition rate depends on the insulation wall thickness: 2–5% at 0.15 mm, 1.5–4% at 0.25 mm, and 1–3% at 0.5 mm and above. These are guidelines — the final loading is adjusted for the base color and the opacity required, and should be confirmed against your own extrusion trial. Durafluor confirms a recommended ratio for each specific application on request.

Which RAL colors are available for ETFE color masterbatch?

Durafluor's ETFE series is available in 11 standard colors referenced to the closest RAL standard: white RAL 9016, grey RAL 7012, orange RAL 2009, black RAL 9004, red RAL 3020, purple RAL 4005, pink RAL 3014, blue RAL 5017, green RAL 6032, brown RAL 8011 and yellow RAL 1016. ETFE grades carry the -E suffix (for example BK-0104-E). Custom colors can be matched on request. Actual appearance depends on insulation wall thickness and the base resin.

Is Durafluor a coating or a paint?

No. Durafluor makes color masterbatch — pigmented pellets that are compounded into molten fluoropolymer resin during extrusion to color the finished part. It is not a paint, a coating, a coil coating or a surface finish, and it is not applied to a substrate. Unrelated products in other industries use similar names; Durafluor color masterbatch is the brand of Changzhou Jinma Polymer Material Co., Ltd. and Changzhou Hengfu New Material Science & Technology Co., Ltd.

What is the difference between FEP and PFA color masterbatch?

FEP and PFA are both perfluoropolymers and behave similarly in processing; the practical difference is heat resistance. FEP melts at 265 ± 15 ℃ while PFA melts at 302–310 ℃, so PFA is chosen where the finished part sees higher service or processing temperatures. Durafluor's FEP and PFA series share the same 11 standard colors and the same specified tensile strength (≥17 MPa) and elongation at break (≥280%). PFA grades carry the P suffix (for example BK-0104P).

Are Durafluor color masterbatches RoHS compliant?

All 11 standard FEP color grades have been tested by CTI (Centre Testing International) for RoHS restricted substances and halogen content, in batches during October 2025 and January 2026. RoHS restricted heavy metals (Pb, Cd, Hg, Cr(VI)) and restricted organic compounds (PBBs, PBDEs, phthalates) were non-detected for all 11 colors, as were chlorine, bromine and iodine. Fluorine content is high, as expected for a fluoropolymer, and is not a restricted substance. This CTI testing covers the FEP series; reports are available on request.

Is a safety data sheet (SDS) available?

Yes. Safety data sheets are available for 33 color grades across the FEP, PFA and ETFE series. SDS coverage for the PVDF series is still being completed. Documents are provided on request.

What is the minimum order quantity and lead time?

Minimum order is 20 kg per color for the FEP and PFA series and 15 kg per color for the ETFE and PVDF series. Typical lead time is 7–10 days, confirmed at order. Samples for evaluation can be requested through the contact page.

Still have a technical question?

Send us your resin, wall thickness and target color — we will come back with a recommended grade and let-down ratio.