Made at our plant in Huizhou since 2016. Conductive grades are specified by resistivity, not by color. We compound to the surface resistivity range your ESD standard requires and document what the lot measured.
The whole point of a conductive grade is a number: the surface resistivity your ESD process needs. Carbon type, loading and dispersion all move that number, so we set them together.
| Carrier resin | PE / PP / PS / ABS — matched to your process |
|---|---|
| Conductive carbon | Specialty conductive carbon black, not standard pigment black |
| Target resistivity | Antistatic through conductive ranges, set to your spec |
| Dispersion control | Controlled, because resistivity moves with dispersion |
| Batch testing | Resistivity measured per lot and reported |
| Certifications | ISO 9001 / 14001 / 45001 |
Tell us the resistivity range you must hit and the base polymer — we will confirm a grade and send sample for your own measurement.
We compound to your target resistivity range and tell you what the lot measured, rather than selling a generic conductive grade.
Conductive carbon loading and dispersion are controlled so your ESD audit does not fail on a new lot.
No trading-company layer. A firm factory quote and a technical answer from the compounder.
Run a trial lot and measure resistivity on your own parts before you commit.
Typical ESD applications our conductive grades are compounded for:
Electronics handling trays and carrier tape.
Antistatic bags and film for components.
Conductive covers, housings and safety parts.
Conductive sheet and profiles for controlled areas.
A conductive grade is bought against a number, and the number is wherever your part has to land.
Everything else about the product — how black it looks, how it runs, what it costs per kilo — sits behind one measurement: surface resistivity. A part that reads 107 Ω/sq when the drawing says 104 is not "nearly there". It fails the ESD audit, and no adjustment at the machine during a production run will pull it back. That is why we ask for the resistivity band before we quote a grade, and why the lot report carries the figure we measured rather than a nominal one.
The practical consequence: do not compare conductive masterbatches by carbon black percentage. Two grades both labelled "40% conductive carbon" can sit three orders of magnitude apart, because what sets the number is how the carbon network is built, not how much carbon went over the weighbridge. A supplier who quotes only a percentage has not given you enough to specify from.
Three things move resistivity, and they are set together, not one at a time: the conductive carbon itself, the loading, and the dispersion. Change one and the other two usually have to move with it. That is the whole of the compounding job on a conductive grade.
The bands buyers actually write into a drawing, and what each one is for.
| Band | Surface resistivity | Typical use | What the part has to do |
|---|---|---|---|
| Conductive | roughly 102–105 Ω/sq | ESD trays, carriers, tote bins, IC handling | Drain charge fast enough that a device never sees a damaging potential |
| Static dissipative | roughly 105–1011 Ω/sq | Work surfaces, floor finishes, film for sensitive assemblies | Bleed charge away in a controlled time — not so fast that it arcs |
| Antistatic | roughly 109–1012 Ω/sq | Packaging film and bags | Stop triboelectric charge building up as the film is unwound |
| Insulative (not our product) | above ~1012 Ω/sq | Ordinary black film, pipe, mouldings | Nothing electrical — this is where standard pigment black lands |
The boundaries move between standards: ANSI/ESD S541 and IEC 61340 do not draw the lines in identical places, and some ESD control plans use volume resistivity where others use surface. Send us the figure from your own drawing or control plan and we work to that figure — not to a generic band off a chart.
The counter-intuitive part of conductive compounding, and the reason two "identical" grades behave differently.
Carbon black only conducts when the particles form a connected network through the polymer. Undispersed agglomerates are clumps of carbon that are electrically isolated from that network — they contribute weight and cost, and nothing to conductivity. On a resistance reading they show up as a part that reads higher than the loading predicts, and reads erratically from one point to the next on the same surface.
When a part reads too resistive, the instinct is to add more carbon. Beyond a certain point the network is already percolated and further loading buys very little conductivity — but it does buy a rougher surface, worse mechanicals, and more die build-up on the line. The better lever is dispersion: build the network you already paid for, rather than buying carbon that clumps.
Resistivity is measured on a finished part, not on the masterbatch, so the reading carries your process inside it: screw configuration and shear history, melt temperature, injection speed, cooling rate, and part geometry all shift the network. Two plants running the same qualified grade can read half an order of magnitude apart and both be within the supplier's lot data. This is exactly why we send trial lots — so the number is measured on your parts before a contract is written.
The four we are asked about most, and what actually causes them.
Almost always a dispersion or carbon-network question rather than a loading error — the weighed-in percentage can be identical while the network is not. The defence is straightforward: a lot report that carries the measured resistivity, so a reorder is judged against a figure instead of against a promise.
Some antistatic systems rely on additives that migrate to the surface, and a wiped or washed surface reads differently from a fresh one. If your ESD plan includes surface-wipe testing, say so at enquiry stage — it rules out systems that only meet the number on day one.
Regrind dilutes the conductive network and can carry contamination from other materials. If regrind is part of your process, tell us the ratio at enquiry — we can set the grade so the target still holds at the regrind level you actually run, rather than only on virgin material.
Point-to-point scatter usually points to agglomerates or to flow lines where the network is stretched thin — thick sections, weld lines and gate areas read worst. It is a dispersion and gating conversation, and both are worth having before a tool is cut.
It depends on your base polymer and the processing window. Tell us the range your standard requires and we will confirm a grade that reaches it, or tell you plainly if it is outside what we can hold.
No. Conductive grades use specialty conductive carbon black, which costs more per kilo and behaves differently in dispersion. Standard pigment black will not reach ESD resistivity levels. See the resistance bands explained →
Yes — 1 ton per specification, which is enough to mould or extrude parts and measure resistivity on your own equipment. Contract pricing starts once the grade is qualified.
Typically 5–10 days to most markets, with resistivity data for the lot.
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.
Conductive and semi-conductive grades are a different compounding route, specified by volume resistivity. This is where that route runs.
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.