Carbon Black for Package UV Protection
Carbon black particles in packaging materials serve as critical UV blockers, but their effectiveness depends on precise control of particle size, dispersion, and loading levels. Current packaging applications require particles ranging from 13-43 µm in diameter, with surface areas up to 300 m2/g, while maintaining mechanical properties and preventing agglomeration that can compromise both protection and aesthetics.
The fundamental challenge lies in achieving optimal UV protection while managing the tradeoffs between particle loading, material processability, and final package performance.
This page brings together solutions from recent research—including thickness-dependent particle size distribution systems, high-surface-area carbon black composites, and advanced dispersion techniques with specific fillers. These and other approaches focus on practical formulations that balance UV protection with processing requirements and end-use performance.
1. Polypropylene Composite with High-Surface-Area Carbon Black and Specific Fillers for Enhanced Gloss and Low Dielectric Properties
KINGFA SCI & TECH CO LTD, 2021
Low-dielectric polypropylene composite material with high gloss and blackness. The material contains polypropylene, carbon black, calcium carbonate, and barium sulfate fillers. The carbon black has a nitrogen adsorption specific surface area of 300 m2/g for better dispersion and blackness without excessive addition. Calcium carbonate and barium sulfate fillers do not cover the carbon black and maintain gloss. This allows reducing dielectric constant compared to using lower surface area carbon blacks.
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