High Gloss Weather-Resistant Black Masterbatch

The MFR of a masterbatch affects how it behaves inside the injection barrel and mold cavity. A high-MFR masterbatch reduces the blend viscosity, which can cause preferential migration of the masterbatch toward the mold surface and flow-front — producing tiger-striping or weld-line darkening on complex geometries. A104E's lower MFR (>1 g/10min versus the >10 g/10min of standard grades) keeps the masterbatch more uniformly distributed in the melt shot, reducing the carbon black concentration gradient between the surface layer and the core. This is the primary mechanism by which A104E achieves consistent gloss across the full part surface rather than only in low-shear zones.

At the filler loading levels implied by an ash content of <15%, and at the 1–3% letdown rate of the masterbatch into the base resin, the total CaCO₃ contribution to the finished part is typically 0.05–0.45% by weight. At these concentrations, the filler has a negligible negative effect on impact strength — the absolute quantity of mineral is far below the threshold (typically 5–10% direct CaCO₃ addition) where impact property reduction becomes measurable. For parts with demanding impact requirements (thin-wall snap-fit closures, structural clips), we recommend confirming at trial; for standard panel and housing applications, no impact penalty has been observed at normal dosage rates.

Yes. The PE carrier in A104E is compatible with both PP and ABS at the letdown concentrations used in injection molding. In ABS, the PE carrier introduces a minor incompatible phase — which is typical of PE-carrier masterbatches in ABS — but at 1–3% letdown the volume fraction of PE in the finished part is 0.65–2%, which is generally below the threshold for visible phase separation or mechanical property loss in standard ABS grades. For high-impact ABS or ABS/PC blends requiring Class-A surface finish, we recommend running a short trial run at your specific barrel temperatures before full production commitment.

A104E has the same basic storage requirements as other pellet-form masterbatches: sealed original packaging, dry warehouse away from direct sunlight, ambient temperature below 40°C. However, because A104E contains CaCO₃ filler which is mildly hygroscopic, moisture pickup on extended storage in humid environments is slightly faster than for filler-free grades. We recommend a pre-use moisture test if bags have been stored unsealed for more than 30 days in high-humidity conditions (above 70% RH). Any material measuring above 0.5% moisture should be dried at 70°C for 2 hours before blending to prevent surface pitting on the injected part.