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PS Color Masterbatch

Updated: 2026-07-15

Overview

PS color masterbatch is a pre-dispersed pigment or dye concentrate designed specifically for coloring polystyrene (PS) plastics. It consists of high-quality pigments, carriers (often PS resin), and additives to ensure stable performance during processing. Compared to raw pigments, masterbatches offer better dispersion, reduced dust, and simplified dosing in production. Widely used in injection molding and extrusion, PS color masterbatch ensures consistent coloration across batches. It is favored for its cost-efficiency, as it reduces waste and minimizes equipment contamination. The product is available in standard and custom colors to meet diverse industrial needs.

Physical and Chemical Properties

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PS color masterbatch typically appears as small granules or pellets, with color determined by the embedded pigment. Its density slightly exceeds pure PS due to the added pigments. The material is thermally stable within the processing range of polystyrene (150–240°C), ensuring no degradation during molding or extrusion. Key chemical properties include insolubility in water and organic solvents at room temperature. However, it disperses uniformly when melted with PS resin. The masterbatch is formulated to resist migration or fading, maintaining color integrity under UV exposure or mechanical stress.

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Main Applications

The primary use of PS color masterbatch is in the manufacturing of colored polystyrene products. Common applications include disposable food packaging (e.g., cups, cutlery), consumer goods (toys, cosmetic cases), and electronic housings. Its precise color matching is critical for brand-specific packaging. In the automotive industry, it colors PS components like interior trim. Masterbatches also enable special effects (e.g., metallic, pearlescent) for decorative items. Medical-grade variants comply with hygiene standards for devices and labware.

Safety and Storage

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PS color masterbatch is generally safe when handled properly. Dust generation during transport or mixing should be minimized to avoid respiratory irritation. Processors must ensure adequate ventilation during high-temperature operations to prevent fume inhalation. Storage recommendations include keeping bags sealed in a dry environment below 30°C to prevent moisture absorption or clumping. Shelf life typically exceeds 12 months if stored correctly. Regulatory compliance (e.g., REACH, FDA) should be confirmed for specific end uses, especially food-contact applications.

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B2B Procurement Guide

When sourcing PS color masterbatch, buyers should prioritize suppliers with proven expertise in plastic coloration. Key selection criteria include pigment concentration (usually 20–40%), compatibility with the base PS resin, and compliance with industry standards (e.g., ISO 9001). Request samples to test color consistency and processing behavior. Bulk orders (≥1 ton) often qualify for discounts. For niche applications (e.g., medical or outdoor use), specify requirements like UV resistance or regulatory certifications upfront. Lead times for custom colors may range from 2–6 weeks.

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