Overview
PC special black masterbatch is a pre-dispersed pigment concentrate designed specifically for polycarbonate (PC) plastics. It combines high-quality carbon black with carrier resins and additives to ensure optimal color strength and processing performance. Unlike universal masterbatches, it is formulated to withstand the high-temperature processing conditions of PC (up to 300°C) without degradation. This masterbatch is engineered to address common challenges in PC coloring, such as uneven dispersion or thermal instability. It is widely used in industries requiring precise color consistency and durability, such as automotive and electronics. The product is available in granular or pellet forms for easy handling and dosing during injection molding or extrusion.
Physical and Chemical Properties
The masterbatch exhibits a density of 1.1-1.3 g/cm³, aligning with typical PC resin densities to prevent sedimentation during processing. Its thermal stability allows it to endure PC processing temperatures without causing discoloration or gas formation. The carbon black content typically ranges from 20% to 40%, depending on the required opacity and shade. Key chemical properties include insolubility in water and organic solvents, ensuring no leaching during end-use applications. The masterbatch also provides UV resistance, making it suitable for outdoor applications. Its low volatile organic compound (VOC) emission meets regulatory standards for automotive and electronic components.
Main Applications
In the automotive sector, PC special black masterbatch is used for interior trims, headlight housings, and dashboard components due to its heat resistance and aesthetic consistency. Electronics manufacturers rely on it for smartphone casings, laptop housings, and optical media, where static dissipation and surface smoothness are critical. The optical industry employs this masterbatch for lenses and light-diffusing components, leveraging its uniform dispersion to avoid light scattering defects. Additionally, it is used in consumer goods like kitchen appliances and power tool housings, where durability and colorfastness are prioritized.
Safety and Storage
While the masterbatch is non-toxic in its solid form, processing at high temperatures may release fumes. Adequate ventilation and personal protective equipment (PPE) such as gloves and masks are recommended during handling. Storage should be in sealed containers to prevent moisture absorption, which could affect dispersion performance. Long-term exposure to humidity can cause clumping, so a dry environment below 30°C is ideal. Bulk quantities should be stored on pallets to avoid floor contact. Shelf life is typically 12-24 months if stored correctly, though manufacturers should be consulted for specific recommendations.
B2B Procurement Guide
When sourcing PC special black masterbatch, buyers should prioritize suppliers with ISO-certified production facilities to ensure consistent quality. Key procurement criteria include carbon black grade (e.g., furnace black vs. channel black), carrier resin compatibility, and compliance with RoHS/REACH regulations. Request lab-scale test reports for parameters like melt flow index (MFI) and color strength (L*a*b* values). Bulk orders (500+ kg) often qualify for discounts, but sample testing is advised to confirm batch-to-batch consistency. Lead times vary by region but typically range from 2-6 weeks for customized formulations.
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