Overview
Red plastic masterbatch granules are pre-dispersed pigment concentrates designed for mass coloring of plastic products. They consist of 20-60% high-performance organic pigments (e.g., PR 112 or PR 254 for bright red shades) uniformly blended with carrier resins like polyethylene (PE) or polypropylene (PP). This format eliminates dust pollution and ensures consistent coloration compared to powder pigments. The granules are compatible with most thermoplastics and maintain stable performance during high-temperature processing (up to 300°C for engineering plastics). Industrial users favor them for their precise dosage control and reduced equipment wear.
Physical and Chemical Properties
The granules exhibit excellent thermal stability, with decomposition temperatures typically exceeding 250°C, making them suitable for injection molding and extrusion processes. Color fastness ratings usually reach 7-8 on the blue scale for light resistance, with minimal fading after prolonged UV exposure. Key technical parameters include melt flow rate (MFR) matching the base polymer (commonly 2-20 g/10min) and ash content below 0.5%. The pigment dispersion quality ensures ≤5μm particle size, preventing speckles in finished products. Most formulations comply with FDA, EU 10/2011, and EN71-3 standards for food contact and toy safety.
Main Applications
Primary applications include coloring disposable food containers (5-8% dosage), children's toys (3-5% dosage), and cosmetic packaging where vibrant red hues are required. In automotive components, they provide UV-stable coloring for interior trims and exterior reflectors. The construction sector utilizes them for PVC pipes and window profiles, while the electronics industry applies them to cable sheathing and appliance housings. Recent developments include anti-counterfeiting masterbatches with unique red shades for brand protection in packaging.
Safety and Storage
While generally non-hazardous, processing may release minimal volatile organic compounds (VOCs) at temperatures above 200°C. Adequate workshop ventilation is recommended. The granules are classified as non-flammable with auto-ignition temperatures above 350°C. Proper storage involves sealed moisture-proof packaging (25kg woven bags with inner PE liner) in warehouses with <60% humidity. Shelf life typically exceeds 12 months when stored correctly. Cross-contamination should be prevented by separating different color masterbatches.
B2B Procurement Guide
When sourcing, verify the masterbatch's carrier resin compatibility (PE-based for LDPE/HDPE, PP-based for homopolymer/copolymer). Request technical datasheets specifying pigment concentration (standard 20-30% for economy grades, 40-50% for high-performance grades). For bulk orders (≥5 tons), negotiate pricing tiers and confirm lead times (typically 2-4 weeks for custom formulations). Quality checks should include lab tests for color deviation (ΔE<1.0), filtration pressure difference (<10% increase), and migration resistance. Reputable suppliers provide batch consistency guarantees and regulatory compliance documentation.
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