Overview
High concentration white masterbatch is a pre-dispersed pigment concentrate containing 70-80% titanium dioxide (TiO2) in a polymer carrier. It is widely used as a cost-effective whitening agent and opacifier in plastic processing industries. The product eliminates direct handling of TiO2 powder, reducing dust contamination while ensuring consistent color dispersion. Major manufacturers optimize formulations for specific polymers like PP, PE, PS, and PET to maintain processing stability and final product performance.
Physical and Chemical Properties
The masterbatch typically appears as uniform white granules with bulk density matching common thermoplastics for easy blending. Its high TiO2 loading provides superior hiding power (≥95% opacity at 5% dosage) compared to standard white masterbatches. Key technical parameters include heat stability up to 280°C (short-term) and excellent lightfastness (≥7 on Blue Scale). The carrier resin system determines melt flow characteristics, with MFI typically ranging 5-25g/10min (190°C/2.16kg) to match host polymers.
Main Applications
Primary use cases include food packaging films requiring FDA compliance, cosmetic containers demanding bright whiteness, and technical parts needing UV protection. Injection-molded appliances account for 45% of consumption, followed by blow-molded bottles (30%) and synthetic fibers (15%). In BOPP films, the masterbatch enables <15μm thin films with required opacity. For engineering plastics like ABS, specially formulated grades prevent degradation during high-temperature processing. Recent developments include anti-microbial variants for medical applications.
Safety and Storage
Although non-hazardous per GHS standards, the powder form requires dust control measures during transportation and mixing. Recommended storage maintains relative humidity below 60% to prevent moisture absorption that could affect dispersion. Thermal degradation above 300°C may release trace volatile organics. Processing facilities should install local exhaust ventilation, especially for automated feeding systems. Bulk containers (500-1000kg) should be resealed after partial use to preserve product integrity.
B2B Procurement Guide
Industrial buyers should specify five critical parameters: TiO2 content (tested by XRF), carrier resin type, melt flow index, thermal stability class, and regulatory certifications (FDA, EU 10/2011, etc.). Sample testing should verify dispersion quality through microscopic analysis and extrusion trials. Leading Chinese manufacturers offer customized formulations with MOQs starting from 1 ton, while European suppliers provide REACH-compliant grades at 20-30% premium. Just-in-time delivery options help manage inventory costs for large-volume users.
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