High-Dispersion Anti-blocking Silica | Masterbatch Grade for PE/PP Opening Masterbatch Manufactured by Shandong Zhonglian Chemical Co., Ltd. Precipitated silica specially optimized for plastic functional masterbatch production. Features superior resin wettability and dispersion efficiency, supports high loading concentration, reduces screen pressure during twin-screw extrusion, minimizes crystal spots and fish eyes, and improves overall production efficiency and yield for masterbatch manufacturers. Request Masterbatch Formula Guidance · Get Bulk Pricing Product Information This masterbatch-grade anti-blocking silica is developed by Shandong Zhonglian Chemical Co., Ltd. targeting the core pain points of masterbatch compounding: poor dispersion, frequent screen clogging, high defect rate and large batch-to-batch fluctuation. We apply targeted surface modification to the silica particles, greatly improving their compatibility and wettability with PE and polyolefin carrier resins. Compared with ordinary precipitated silica, this grade achieves faster and more uniform dispersion in polymer melt under twin-screw extrusion. It supports up to 10% loading concentration in opening masterbatch while maintaining good melt fluidity, effectively reducing screen pressure buildup and extending the continuous production cycle between screen changes. The low-abrasion particle morphology also reduces wear on screws and die heads, lowering equipment maintenance costs. We implement strict inline monitoring of particle size distribution and oil absorption across every production batch, keeping key indicators within a narrow fluctuation range. This helps masterbatch producers avoid repeated formula debugging when switching batches, stabilize downstream film performance, and reduce quality control workload. Product Appearance White free-flowing amorphous powder with uniform particle size, low agglomeration tendency, smooth feeding performance and low dust generation during processing. Product Parameters 表格 Item Specification SiO₂ Content (Ignited Basis) ≥ 97.5% Loss on Ignition (1000℃, 1h) ≤ 8.0% Moisture (As Packed, 105℃, 2h) 3.0 – 5.5% pH (5% Water Suspension) 6.5 – 7.3 Bulk Density 0.19 – 0.27 g/cm³ DBP Oil Absorption 80 – 110 cm³/100g Median Particle Size (D50) 3 – 7 μm Sieve Residue (325 mesh) ≤ 0.05% BET Surface Area 100 – 140 m²/g Whiteness (CIE L*) ≥ 97.5 Heavy Metal Limits Arsenic ≤1ppm, Lead ≤2ppm, Mercury ≤0.5ppm Total Aerobic Plate Count ≤ 50 cfu/g Core Material Surface-modified amorphous precipitated silica Primary Application Anti-blocking opening masterbatch, polyolefin functional masterbatch Product Features 1. Optimized Surface Wettability & Easy Dispersion Surface-modified particle structure delivers excellent wettability with PE and PP carrier resins, enabling rapid and uniform dispersion during twin-screw compounding without prolonged mixing. 2. Stable Melt Fluidity at High Loading Balanced oil absorption design maintains good melt fluidity even at 8–10% high loading concentration, avoiding excessive torque rise and screw slip during extrusion. 3. Ultra-low Large Particle Residue Strict multi-stage screening and depolymerization process minimizes oversize particles, effectively reducing crystal spots and fish eyes in finished masterbatch and downstream films. 4. Low Screen Clogging & Long Production Cycle Uniform particle size and low agglomeration reduce screen pack buildup, extend continuous production runtime, and cut down screen replacement frequency and material waste. 5. Tight Batch-to-batch Consistency Real-time inline control of critical parameters keeps performance fluctuation between batches at minimum, reducing masterbatch formula adjustment and quality verification work. Core Advantages Higher Production Efficiency & Lower Comprehensive Cost Superior dispersion and processing stability reduce production downtime, defect rate and equipment wear, helping masterbatch manufacturers improve overall output and lower per-unit production cost. Compatible with Multi-functional Masterbatch Formulations Chemically inert and compatible with slip agents, antistatic agents, antioxidants and UV stabilizers. It can be compounded into multi-functional composite masterbatch without impairing the efficacy of other additives. Usage & Storage Instructions 1.Recommended loading: 3% – 8% in conventional opening masterbatch; up to 8% – 10% for high-concentration concentrate masterbatch, adjusted according to extrusion capability and target film performance. 2.Pre-blend with carrier resin and other additives in a high-speed mixer first, then feed into twin-screw extruder for compounding and pelletizing. 3.Recommended mesh size of screen pack: 80–120 mesh for conventional masterbatch; 150–200 mesh for high-grade masterbatch, adjusted according to actual dispersion requirements. 4.Control extrusion temperature properly according to carrier resin type to ensure full resin melting and uniform silica dispersion. 5.Storage: Keep in sealed original packaging in a dry warehouse. Reseal bags after opening to prevent moisture absorption and particle agglomeration. Application Scenarios PE Anti-blocking Masterbatch Suitable for LDPE/LLDPE carrier opening masterbatch, widely used for blown film, agricultural film and packaging film downstream markets. PP / BOPP Opening Masterbatch Compatible with PP resin systems, for producing anti-blocking masterbatch used in BOPP biaxial film and cast PP film production. Multi-functional Composite Masterbatch Ideal for compounding with slip agent, antistatic agent and other additives to produce multi-functional masterbatch for various film applications. Food-grade Opening Masterbatch Strict heavy metal and microbial control meets food contact safety standards, suitable for food packaging grade opening masterbatch production.