Overview
Extrusion drawing masterbatch is a pre-dispersed pigment concentrate formulated specifically for coloring plastic fibers and filaments during extrusion processes. It consists of high-load pigments (20-50%) uniformly distributed in a carrier resin matching the base polymer. This masterbatch type is engineered for thin-section applications where color consistency and dispersion quality are critical. Unlike standard color masterbatches, it features optimized rheology for drawing processes and enhanced thermal stability to withstand extrusion temperatures.
Physical and Chemical Properties
The product typically exhibits excellent melt flow properties with MFI (Melt Flow Index) values between 5-25 g/10min (230°C/2.16kg) to ensure smooth processing. Pigment particle size is carefully controlled below 5μm to prevent fiber breakage during drawing. Chemical resistance varies by formulation but generally matches the base resin's properties. Most formulations show good lightfastness (4-7 on blue scale) and heat stability up to 280°C for short durations. Electrical properties remain unaffected at typical usage ratios (1-4%).
Main Applications
Primary use is in synthetic fiber production for textiles, including PP spunbond nonwovens, PET filament yarns, and PE monofilaments. It's also applied in plastic rope manufacturing, artificial turf fibers, and filtration mesh production. In industrial applications, the masterbatch colors extrusion-drawn products like plastic strapping bands, fishing lines, and geo-textiles. Special grades are available for food-contact applications complying with FDA/EC regulations when using approved pigments.
Safety and Storage
While generally classified as non-hazardous, dust generation during handling should be minimized through proper ventilation. The product is stable under normal conditions but may degrade if exposed to temperatures above 50°C for prolonged periods. Storage recommendations include keeping original packaging sealed in low-humidity environments (<60% RH). Shelf life is typically 12-24 months when stored properly. Opened bags should be resealed or transferred to airtight containers to prevent moisture absorption.
B2B Procurement Guide
Industrial buyers should verify the masterbatch's compatibility with their specific base resin (e.g., PP homopolymer vs. copolymer). Key specifications to request include: pigment concentration, recommended let-down ratio (usually 1-5%), and maximum processing temperature. For consistent quality, establish color matching protocols with suppliers using standardized measurement systems (e.g., CIELAB values). Bulk purchases (500kg+) often attract 10-15% discounts. Consider suppliers offering technical support for troubleshooting extrusion issues like die buildup or color streaks.
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