Made at our plant in Huizhou since 2016. Cable jacketing runs fast and continuous: one carbon agglomerate can thin the wall at a critical point. This grade is compounded for clean running at speed and for outdoor cable life.
Cable is expected to sit in a duct, on a pole or underground for decades. The masterbatch has to run clean at line speed and protect the jacket from UV for the whole service life.
| Carrier resin | PE / LDPE / LLDPE (PVC-compatible grades on request) |
|---|---|
| Carbon black content | UV-protection loading for outdoor and aerial cable |
| Standard grades | H6045 · CM50 — see the full TDS chart |
| Dispersion | Fine — agglomerates thin the wall and create failure points |
| Melt flow (MFR) | Matched to high-speed sheathing extrusion |
| Surface finish | Smooth jacket surface for pulling through duct |
| Certifications | ISO 9001 / 14001 / 45001 |
Send us your jacket material, wall thickness and line speed — we will match a grade and send sample.
Aerial and exposed cable need carbon loaded for UV protection, not only for a black jacket.
Dispersion is controlled so your sheathing line is not stopped by screen changes or wall defects.
No trading-company layer. A firm factory quote and stable pricing across repeat lots.
Run a trial on your own sheathing line before you commit. We keep your spec confidential.
Typical cable applications our black masterbatch is compounded for:
LV and MV power cable sheathing.
Ducting and inner sheath for communications cable.
Self-supporting aerial runs exposed to full sun.
Internal and external building wire sheathing.
The phrase "cable grade black masterbatch" gets used for three completely different jobs. They are not interchangeable, and sending a jacket grade to an insulation or screen line is the most expensive specification mistake we are asked to unpick.
| Layer | What it has to do | What drives the specification |
|---|---|---|
| Outer jacket | Survive decades of sun, abrasion and duct pulling | Carbon loading for UV stability, smooth surface, low die build-up at high line speed |
| Insulation | Hold voltage without breakdown | Very tight limits on carbon content and foreign particles — a stray agglomerate can start an electrical tree |
| Semi-conductive screen | Even out the electrical field around the conductor | Specified as a volume resistivity, not as a carbon percentage — a different compounding route altogether |
The jacket layer is what we compound every day. If your enquiry is for insulation or for a semi-conductive screen, send us the requirement — we will tell you straight whether it is in scope for our plant, rather than quote for something we cannot document.
Jacket defects trace back to the compound far more often than to the extruder settings. These are the four we get asked about most, and what actually causes them.
Almost always undispersed carbon agglomerates, or a gel from a carrier that does not match your jacket polymer. Ask for the filter pressure value on the lot — the carbon content figure alone will not predict it.
Agglomerates change how the melt flows locally, so the wall thins at the same point run after run. A grade matched on both MFR and dispersion holds tolerance.
Moisture carried in with the masterbatch, or oversized agglomerates. Both are compounding and drying questions, not something you can dial out at the extruder.
Rarely a pigment problem — normally carbon content varying lot to lot. A CoA that reports carbon content is what keeps a reorder identical to the first order.
Tell us which standard the cable has to meet and we will confirm what we can supply. If a clause is outside what we can document, we say so rather than paper over it.
We match MFR to your line speed and jacket material. Give us the speed and wall thickness and we will propose a grade that holds it.
Trial lots start at 1 ton per specification, which is usually enough for a full sheathing trial run. Tell us your monthly cable volume and we will quote both trial and contract pricing.
Typically 5–10 days to most markets. We size the sample to a sheathing trial run and include let-down and drying guidance for your line.
Our cable business is built around the jacket layer. Insulation compounds are a different product made to much tighter contamination limits. If you need insulation grade, send us the specification and we will tell you plainly whether it is in scope for our plant.
Standard UV-stable jacket grades are compounded for the loading your cable standard calls for — typically around 2.5% carbon black in the finished compound. We report carbon black content and dispersion by lot. Tell us the standard your cable must meet and we will confirm the figure we can document.
Jacket grades are what we compound every day. Conductive and semi-conductive grades are a different compounding route — specified by volume resistivity rather than by carbon percentage, with far tighter contamination limits. We do make conductive black masterbatch; send us the resistivity figure your screen layer has to hold and we will tell you straight whether it is in scope for our plant.
Our plant is built around black. Core identification colours — blue, brown, green-yellow and the rest — are a different product line, and we would rather point you to a colour specialist than quote for something we do not run. What we do control is lot-to-lot consistency of the black itself, which is what makes a colour stripe readable against it.
Almost never by buying the cheapest grade per kilo. On a cable line the cost sits in let-down ratio, scrap from dispersion defects and line stoppages — not in the invoice price of the masterbatch. Our guide to cutting black masterbatch cost walks through the four levers in the order they actually move the number.
Tell us what you are running and how much you need. We reply with a firm factory quote — and, if you want to test before committing, a free 1–5 kg sample compounded on your own carrier resin. No obligation.
Two technical notes that go with this page — one on which layer needs which grade, one on why dispersion decides jacket life.
Jacket, insulation and semi-conductive screen are bought on three different specifications. What to ask for at each, and the test methods to name in your enquiry.
Two jackets can both test 2.5% carbon black and behave completely differently outdoors. The specification most data sheets omit.
Jacket compounds fail on dispersion long before they fail on carbon content. This is the compounding and QC line that decides it.
Full factory tour —2:50 on YouTube
Two minutes and fifty seconds inside the Huizhou plant: raw-material dosing, compounding, pelletising, packing and the QC laboratory.
Watch the full tour on YouTube →
Factory-direct. Annual capacity 60,000 t/yr. Certification details on the certifications page.