Made at our plant in Huizhou since 2016. We compound black masterbatch for water, gas and corrugated pipe and for cable jackets — high carbon loading for weather resistance and a long, stable life underground.
Buried pipe and cable live outdoors for decades. The masterbatch has to hold color and protect the polymer from UV — lot after lot, year after year.
| Carrier resin | PE / HDPE / LLDPE (other carriers on request) |
|---|---|
| Carbon black content | 35 – 50% (UV-protection grade for outdoor pipe) |
| Standard grades | 6045 · H6045 · 508C — see the full TDS chart |
| UV / weather resistance | High carbon loading for long-term outdoor stability |
| Dispersion | Released on filter-pressure test (ISO 23900-5); the batch CoA states the result with mesh size and test polymer |
| Melt flow (MFR) | Matched to your pipe / jacket extrusion line |
| Certifications | ISO 9001 / 14001 / 45001 |
Send your pipe standard (e.g. PE80 / PE100) and wall / process — we match a grade to it.
A masterbatch does not carry a pipe's pressure rating. What it can do is quietly ruin one. These are the failure modes a PE pipe compound is tested against, and what we put behind each of them.
| Hydrostatic strength ISO 1167 / ISO 9080 | Pressure pipe is classified by long-term hydrostatic strength and the MRS derived from it. We do not run your ISO 1167 series — the pipe or the compound certificate does. What we hold is the thing that certificate was written against: carbon loading and carrier MFR kept constant lot to lot, so the formulation behind the approval does not drift after it is granted. |
|---|---|
| Oxidation induction time (OIT) ISO 11357-6 | Carbon black is the compound's UV screen and a working part of its thermal-oxidative stability, so OIT is where a change in carbon black type or loading shows up first. Give us the OIT window your compound has to hold and we match the carbon black to that window rather than to a price. |
| Slow crack growth (SCG) ISO 13479 / ISO 16770 | The failure mode that decides service life in buried PE pipe. An agglomerate or a gel is a stress concentrator, and a stress concentrator is where a slow crack starts. This is why dispersion is the specification that matters on a pipe grade, ahead of jetness. |
| Dispersion and filter pressure ISO 18553 · ISO 23900-5 | Our pipe grades are released on filter-pressure test and the CoA states the result. Ask any supplier for the mesh size and the test polymer alongside the number — a filter-pressure value without them cannot be compared with anyone else's. |
| Gels and fines | Pellet size distribution and fines are controlled at pelletising and screened before packing. Fines are what become gels and screen-pack blockages on a long pipe run. |
What we will not claim: we do not hold and will not advertise a pipe-level approval such as ISO 4427, EN 12201 or NSF/ANSI 61 — those are certified on the pipe or the compound, not on a masterbatch. What we supply is the formulation data and the batch CoA your certifying body will ask for. Where a listing is one we do not hold, we say so before you specify, not after.
High carbon loading protects the pipe and jacket from sunlight so color and properties hold over years of service.
High dispersion means no streaks or gels that cause weak points or line rejects on your extruder.
No trading-company layer. A firm factory quote and a faster answer — the margin stays in your cost.
Run a trial lot on your own line before you commit. We keep your spec confidential.
Typical pipe and cable applications our black masterbatch is compounded for:
Pressure pipe black for PE80 / PE100 systems, buried and exposed runs.
UV-stable black for power and comms cable sheathing.
Stable black for double-wall and drainage pipe.
Drip, irrigation and conduit pipe where weather resistance matters.
Pipe is a long-service, high-consequence application: a failure is found years later, underground, in someone else’s project. Three requirements follow from that.
| Pipe | Typical carbon in wall | Priority |
|---|---|---|
| Above-ground PE water pipe | 2–2.5% | UV lifetime, dispersion |
| Buried PE water pipe | 2–2.5% | Dispersion, ash content, long-term strength |
| Conduit / cable duct | 2–3% | UV plus impact |
| Corrugated drainage | 2–3% | Dispersion through thin corrugation walls |
| PVC pipe (different system) | n/a | See the carrier compatibility guide — PE carriers do not apply |
See grade 6045 and grade 508C for pipe-oriented formulations, and carbon black loading for UV service for why the window is where it is.
For outdoor and exposed pipe we supply high carbon-loading, UV-stable grades. Tell us the exposure and service life you need and we'll propose the loading.
We tune carrier, carbon loading and MFR to your pipe grade and extrusion line. Share the standard and wall thickness and we'll match a starting grade.
We support trial and small batches, not just full containers. Tell us quantity and we'll quote both a trial lot and a production lot.
Trial lots ship in 5–10 days to most markets, quoted per RFQ, packed with your let-down guidance so your line can run it directly.
Every grade below is compounded in the same plant, with a full TDS and batch CoA per lot. Click through for the technical data.
Potable water supply pipe
View grade & TDS → ~45% CB · PEH6045Exposed water & gas pipe
View grade & TDS → 13% ±2 CB · PE + CaCO₃508CSewer & drainage pipe
View grade & TDS →Not sure which one fits? Compare all grades in one chart →
Tell us your pipe grade, carrier and quantity. 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.
Carbon black dosing, twin-screw compounding, underwater pelletising and the QC lab that releases every lot. If you are qualifying a new supplier, this is the part worth watching before you send a spec.
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.