The grade for thin mulch film below 15 μm, protective bags and co-ex black layers. 46% carbon black on unfilled PE reaches full blackout at 1–1.5% let-down — and the 0.30% moisture ceiling keeps thin gauge free of bubbles and streaks.
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 | 46% ±2 |
| Carrier system | PE (unfilled) |
| Ash content | <1% (unfilled) |
| Melt flow rate (190 °C) | >10 g/10 min (21.6 kg) |
| Moisture | <0.30% |
| Recommended let-down | 1–1.5% |
| Density | <2.0 g/cm³ |
| FOB price range | USD 2.00–4.20 / kg (FOB) |
| Minimum order | 500 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 N4066 shows up in our export business, and why buyers pick it.
Full blackout at 1–1.5% let-down — versus 3–5% for standard 25–30% grades. Less masterbatch per ton, less carrier diluting thin-gauge mechanicals.
High hiding on black-out bag structures at low dosage.
Unfilled carrier for the 2–3% black layer of EVA/LLDPE barrier films.
Hiding power that covers MRF-grey recyclate without over-dosing.
The formulation logic behind the spec sheet — what the chart does not say.
The cost math buyers miss: at 1–1.5% let-down you use 15–20 kg of N4066 per ton of film. A 25–30% grade needs 35–50 kg per ton for the same opacity. Even at a higher per-kg price, the finished-ton cost is 40–60% lower — with less PE carrier softening the film.
Why moisture below 0.30%: at 12–15 μm gauge, any moisture becomes visible bubbles and streaks. The spec is set for thin film, not for general purpose.
The <1% ash is deliberate for optical film: no filler gels, no die lines, no pinholes in the black layer.
N4066 is the thin-gauge specialist. Its value is a moisture ceiling, not a headline carbon black number.
| Grade | Carbon black | Carrier system | Let-down | FOB price | Best for |
|---|---|---|---|---|---|
| N4066 | 46% ±2 | PE (unfilled) | 1–1.5% | USD 2.00–4.20 | Mulch film below 15 µm, protective bags, co-ex black layers |
| CM50 | 47% ±2 | PE (unfilled) | 1–3% | USD 2.10–4.50 | Blown film where full blackout matters and gauge is more forgiving |
| 508C | 13% ±2 | PE + CaCO₃ (~56%) | 3–6% | USD 1.20–2.80 | Cost-driven extrusion where UV and thin gauge are not the drivers |
Below 15 µm, the failure modes change. Three that come up repeatedly in agricultural film.
Thin mulch film gives moisture nowhere to hide. The grade leaves us under a stated ceiling; a pallet opened in a monsoon-season warehouse will not. Keep bags sealed until the hopper, rotate stock, and never leave a part-used pallet open overnight.
Blackness (how black it looks) and opacity (how much light it blocks) are different properties. Mulch film is usually specified on the second. If your target is soil-temperature control or weed suppression, tell us the requirement rather than the colour, and we will dose for light transmission.
At 1–1.5% let-down a small dosing error is a large relative error. On thin film that is the difference between full blackout and a translucent patch. Gravimetric dosing, or at least a calibrated volumetric feeder checked by weight, is not optional at this gauge.
At full opacity, yes: 1–1.5% let-down versus 3–5%. Run both on your line and weigh the masterbatch consumed per ton of film — the trial settles it in half a shift.
It is used down to 10–12 μm in cast and blown structures. Below that, send us your line details and we confirm die/screen pack recommendations before you commit.
25 kg KP or PE bags, 20 bags per pallet, wrapped for export. Loading port Shenzhen.
Use the form below or email Zoe Lin with your polymer, process and target. The full N4066 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.
No. Food-contact work needs a food-contact carrier system — see AM3910 for rigid food-contact articles and AM4018 for light-shielding food packaging film. N4066 is an agricultural and industrial film grade.
The supplied material is characterised below 0.30%. That ceiling is the reason the grade is specified for thin gauge, and it is measured on the lot rather than stated as a design target — the CoA carries the figure.
Greenhouse film normally needs a UV-stabilised, often multi-layer structure and a specific service life measured in seasons. Send us the construction and target life and we will say whether a single-layer black route is appropriate or whether the answer is a co-ex structure.
Tell us your polymer, process and target carbon black in the part. We reply with the N4066 spec sheet, a let-down recommendation and a firm factory quote.
N4066 is compounded for thin-gauge film, where the loading has to hold opacity at low gauge. This is the line and the QC.
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.