A cost-optimized compounding grade for twin-screw lines running PP and PE black compounds. 45% carbon black in a carrier-free system with CaCO₃ — no foreign carrier phase, and the mineral does double duty as nucleation and cost control.
Typical values from in-house QC. We confirm the contractual spec against your order, with a batch CoA on every shipment.
| Property | Typical value |
|---|---|
| Carbon black content | 45% ±2 |
| Carrier system | Carrier-free + CaCO₃ |
| Ash content | <10% |
| Melt flow rate (190 °C) | >1 g/10 min (21.6 kg) |
| Moisture | <0.50% |
| Recommended let-down | 2–4% |
| Density | — |
| FOB price range | USD 1.60–3.60 / kg (FOB) |
| Minimum order | 1,000 kg (samples free) |
| Delivery | 10–14 days after spec confirmation |
| Packaging | 25 kg KP or PE bags, 20 bags per pallet |
| Loading port | Shenzhen, China |
| HS code | 32064900 |
| Quality standards | ISO 9001 / 14001 / 45001 plant · batch CoA per lot |
Values are typical QC reference data, not contractual specifications — request the full TDS and we send it the same day.
Where Y07B shows up in our export business, and why buyers pick it.
Twin-screw compounders who buy black concentrate to let down into their own compound — no carrier mismatch because there is no carrier.
Where color cost per ton matters more than optical perfection.
CaCO₃ tolerates contamination-heavy feeds and hides MRF grey.
Non-cosmetic parts where blackness matters, gloss does not.
The formulation logic behind the spec sheet — what the chart does not say.
Carrier-free means what it says: the pellets are carbon black, wax and CaCO₃ — no PE or PP carrier resin. Whatever you compound it into, you are not adding an immiscible phase, so impact and HDT stay where your formulation put them.
Why CaCO₃ at this loading: at ~10% ash the mineral raises stiffness slightly, controls shrinkage, and pulls material cost down — a fair trade for compounding and non-cosmetic extrusion where the part is black anyway.
MFR >1 g/10 min is low on purpose: this grade expects barrel length and screw geometry to do the mixing, which is exactly what twin-screw compounders have.
Y07B is aimed at compounders, not converters. That changes what the numbers mean.
| Grade | Carbon black | Carrier system | Let-down | FOB price | Best for |
|---|---|---|---|---|---|
| Y07B | 45% ±2 | Carrier-free + CaCO₃ | 2–4% | USD 1.60–3.60 | Twin-screw PP and PE black compounds, cost-optimised |
| PP30F | 30% ±2 | PP (unfilled) | 2–4% | USD 2.00–4.30 | GFPP, toughened PP and recycled PP where a PE carrier would be immiscible |
| CM50 | 47% ±2 | PE (unfilled) | 1–3% | USD 2.10–4.50 | Blown film needing full blackout with no mineral in the system |
A carrier-free grade is an ingredient, not a finished masterbatch. It is judged differently.
Carrier-free systems are designed to be let down into a twin-screw compounding operation where the screw does the dispersive work. On a single-screw extruder the available mixing energy is usually too low, and the result is poor dispersion and unstable pressure.
The CaCO₃ in Y07B becomes part of your finished compound's filler content. If your compound already specifies a mineral loading, you are adding to it. Compounders who run the arithmetic up front get a cheaper formulation; those who do not discover it at the customer's incoming inspection.
Carrier-free grades are bought per unit of carbon black delivered, not per kilogram of masterbatch. Compare on the carbon black you actually introduce into the compound, then add the mineral it brings with it.
Not recommended. The CaCO₃ loading raises gel count in thin gauge. For film, look at CM50 or N4066 — both unfilled.
You skip pigment handling, dust and dispersion. On a twin-screw with good mixing you get equivalent jetness with none of the housekeeping — most compounders find the small premium pays for itself in batch time.
1,000 kg for production lots. Samples for line trial are free — we ship 2–5 kg with the CoA.
Use the form below or email Zoe Lin with your polymer, process and target. The full Y07B data sheet goes out the same day, and a free 2–5 kg line-trial sample follows — produced under the same compounding conditions as commercial batches.
It means the system has no dedicated foreign carrier phase — the carbon black is delivered in a way that disperses into whatever base polymer you are compounding, rather than being pre-dispersed in a PE or PP carrier that then has to be compatible with your matrix.
Not usually. It is supplied for compounding operations where dispersion energy is available. If you are a converter working directly from a hopper, tell us and we will point you to a carrier-based grade instead — PP30F for PP systems, CM50 for PE film.
1,000 kg, because the grade is priced for compounding volumes. Trial material at a few kilograms is free.
Tell us your polymer, process and target carbon black in the part. We reply with the Y07B spec sheet, a let-down recommendation and a firm factory quote.
Y07B is one of the grades produced on the same line as the rest of the range, with a batch CoA for every lot. This is the plant.
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.