Additive-free Masterbatch
Overview
Additive-free Masterbatch is a specialized colorant formulation designed for plastics manufacturing, free from fillers or processing aids. It consists of pure pigments or dyes uniformly dispersed in a carrier resin, ensuring precise coloration without altering the polymer's inherent properties. This product is engineered for industries requiring strict material purity, such as food-contact packaging or medical devices. Its additive-free nature minimizes contamination risks and simplifies regulatory compliance, particularly for FDA or EU standards.
Physical and Chemical Properties
The masterbatch exhibits properties dictated by its carrier resin (often polyethylene, polypropylene, or polystyrene) and pigment system. Typical melt flow indices range from 5–50 g/10min (230°C/2.16kg), ensuring good processability in extrusion or injection molding. Chemically inert, it resists migration and bleeding in final products. Lightfastness varies by pigment grade (typically 7–8 on the Blue Wool Scale for premium grades). Particle size is tightly controlled (<5μm) to prevent filter clogging during processing.
Main Applications
Primary use is in thin-film packaging (e.g., shrink films, pouches) where additive interference could compromise seal strength or clarity. Automotive applications include interior trim components requiring UV stability. The electronics sector utilizes it for wire insulation coloring, benefiting from its dielectric consistency. In consumer goods, it colors items like storage containers and toys where color uniformity is critical across production batches.
Safety and Storage
Classified as non-dangerous goods for transport under UN standards when properly packaged. Shelf life typically exceeds 24 months in original moisture-proof bags at <30°C. For workplace safety, general dust control measures are recommended during manual handling. Spills should be collected mechanically—avoid water flushing to prevent environmental contamination.
B2B Procurement Guide
Specify requirements: pigment concentration (usually 20–50%), carrier resin type, and target let-down ratio (commonly 1–5%). Request batch-to-batch color consistency data (ΔE <1.0 is industry standard). For large orders (>5 tons), negotiate pricing based on annual volume commitments. Verify supplier testing capabilities for thermal stability (e.g., 300°C for 30 minutes) and dispersion quality (filter pressure test).
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