Environmentally Friendly Black Masterbatch

The carrier resin in a masterbatch acts as the medium that distributes carbon black into your base polymer during processing. Virgin-PE carriers are produced from fresh petrochemical feedstock and offer highly predictable melt behavior, but come at a higher material cost and carry the full environmental burden of primary polymer production. Recycled-PE carriers derive from post-industrial waste streams — off-spec film, production trim, regrind — and are reprocessed to achieve controlled melt index ranges suitable for masterbatch compounding. The E-LUCK E20 uses a conditioned post-industrial PE stream selected for consistent MFR, which means the processing behavior is stable while the carbon footprint of the carrier material is significantly reduced versus a virgin alternative.

The E20 grade is formulated for shopping bags, garbage liners, agricultural film, and general industrial blown film — categories where food contact compliance is not a primary requirement. It is not tested or certified for direct food contact applications under EU Regulation 10/2011, FDA 21 CFR, or equivalent frameworks. For film converters producing black packaging that will be in direct contact with food, E-LUCK offers a separate food-grade black masterbatch line with the corresponding documentation and compliance testing. Please enquire with our technical team and specify your target regulation.

For a 25-micron single-layer LDPE or LLDPE shopping bag, full light block is typically achieved at 2–2.5% letdown of E20. At 1.5%, the film will appear uniformly black under normal handling but may show light transmission when held directly against a strong light source — acceptable for most applications, but below the threshold for light-sensitive content bags. Gauge thicker than 40 micron will achieve full opacity at 1.5% or lower. For co-extrusion structures, apply the masterbatch to the outer skin layer only at 3%, which achieves the same optical result using less total masterbatch per kg of film.

Calcium carbonate (CaCO₃) is an inorganic mineral filler that partially replaces polymer in the masterbatch carrier. In the finished film, it contributes stiffness and dimensional stability, which is particularly useful in shopping bags that need to hold their shape during loading. The filler also allows gauge reduction — the film can be run thinner while retaining adequate mechanical performance — which reduces total resin consumption per bag and directly lowers material cost. Because mineral fillers are lower-cost than polymer resin on a per-kilogram basis, the CaCO₃ content in E20 also contributes to the overall cost-competitiveness of the masterbatch relative to all-polymer alternatives.

Store E20 in its original sealed bag inside a dry, temperature-controlled warehouse. Avoid areas with ambient humidity above 70% RH and keep bags away from direct sunlight, which can raise pellet surface temperature and encourage moisture condensation when the bag is subsequently opened. Do not stack pallets more than three-high to prevent bag rupture and pellet contamination. Once a bag is opened, reseal it or transfer the contents to a sealed hopper within 24 hours. Product stored correctly in unopened bags maintains specification for 12 months from production date; beyond that, we recommend running a quick moisture test before use.

Yes. E-LUCK operates a custom manufacturing service for buyers who require formulations outside the standard product range — this includes modified carbon black concentrations, alternative carrier resins (PP, EVA, metallocene PE), specific additive packages (anti-block, slip, UV stabilizer inclusion), and private-label pellet packaging. Custom orders typically require a minimum volume commitment and a technical consultation to validate the formulation against your specific base resin and process conditions. Lead times for custom grades range from 15 to 30 working days after formulation sign-off. Submit your specification through our Custom Manufacturing inquiry page.