Anti-blocking Silica for Opening Masterbatch | Easy Dispersion Grade Manufactured by Shandong Zhonglian Chemical Co., Ltd. Precipitated silica specially engineered for plastic functional masterbatch production. Features excellent dispersion compatibility and stable batch consistency, ideal for twin-screw extrusion compounding of PE/PP anti-blocking masterbatch. Get Masterbatch Formula Suggestion · Request Bulk Quote Product Information This easy-dispersion grade anti-blocking silica is a special product developed by Shandong Zhonglian Chemical Co., Ltd. for functional masterbatch manufacturers. Aiming at the pain points of poor dispersion, easy dust flying and large formula fluctuation in the masterbatch production process of ordinary silica, we have optimized the particle surface treatment and powder flow performance. The product adopts controlled particle morphology design, with good compatibility with PE, PP and other polyolefin carrier resins. In the twin-screw extrusion compounding process, it can be quickly and uniformly dispersed in the resin melt, reducing the occurrence of masterbatch crystal points and fish eyes, and improving the quality rate of masterbatch products. At the same time, the product has reasonable oil absorption design, which can maintain good processing fluidity in the process of high-concentration masterbatch production, and is not easy to cause equipment pressure rise and screw slip. It supports 3% – 8% conventional addition amount, and can also meet the production needs of higher concentration opening masterbatch. Our factory implements strict batch consistency control. The key indicators such as particle size, oil absorption and whiteness of each batch of products are controlled within a very narrow range, which can effectively reduce the repeated debugging of masterbatch manufacturers when changing batches, and stabilize the product performance of downstream customers. Product Appearance White uniform fine powder, good fluidity, not easy to agglomerate, easy to feed and mix in the masterbatch production process, less dust. 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 0.20 – 0.28 g/cm³ DBP Oil Absorption 80 – 110 cm³/100g Median Particle Size (D50) 3 – 7 μm 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 Amorphous precipitated hydrated silica Primary Application Anti-blocking opening masterbatch, polyolefin functional masterbatch Product Features 1. Excellent Dispersion in Polyolefin Resins Optimized particle surface properties, good wettability with PE and PP carrier resins, easy to disperse during twin-screw extrusion, reducing masterbatch filter pressure rise and screen replacement frequency. 2. Good Processing Fluidity Reasonable oil absorption value design, even under high addition concentration, it can still maintain good melt fluidity, not easy to cause screw slip, and ensure stable production of masterbatch extrusion line. 3. Low Defect Rate of Masterbatch Strict control of large particles and agglomerates in the powder, the produced masterbatch has few crystal points and fish eyes, and the finished film has good surface quality after use. 4. Stable Batch Consistency Online real-time monitoring of key production indicators, small batch-to-batch fluctuation, reducing the workload of masterbatch formula adjustment and improving production efficiency. 5. Complete Certification Support Complete food contact and environmental protection certification, supporting masterbatch manufacturers to export products to Europe, North America, Southeast Asia and other global markets. Core Advantages Improve Masterbatch Production Efficiency Good dispersion and processing fluidity reduce the difficulty of twin-screw extrusion compounding, improve production efficiency, reduce the frequency of screen replacement and equipment cleaning, and reduce comprehensive production costs. Support Diversified Masterbatch Formulation It can be used alone to make anti-blocking masterbatch, or compounded with slip agent, antioxidant, light stabilizer and other additives to make multi-functional composite masterbatch. The product has good chemical stability and will not affect the efficacy of other functional additives. Usage & Storage Instructions 1.Recommended addition ratio: 3% – 8% in conventional anti-blocking masterbatch; for high-concentration masterbatch, it can be adjusted appropriately according to processing capacity and dispersion effect. 2.It is recommended to fully mix with carrier resin and other additives in the high-speed mixer first, and then extrude and granulate with twin-screw. 3.Control the processing temperature according to different carrier resins to ensure full melting of resin and uniform dispersion of silica particles. 4.The masterbatch finished product should also be stored in a dry and sealed environment to avoid moisture absorption affecting the use effect. 5.Raw material storage: Store in a cool and dry warehouse, seal the bag mouth after opening, prevent moisture absorption and agglomeration, and avoid dust pollution. Application Scenarios PE Anti-blocking Masterbatch Suitable for LDPE/LLDPE carrier opening masterbatch production, widely used in blown film, agricultural film, packaging film and other downstream fields. PP Anti-blocking Masterbatch Adapted to PP carrier masterbatch system, used for BOPP film, cast PP film and other polypropylene film anti-blocking functional masterbatch. Multi-functional Composite Masterbatch Can be compounded with slip agent, antistatic agent, antioxidant, etc. to produce multi-functional composite masterbatch, with good compatibility with various functional additives. Food Grade Masterbatch Strict heavy metal and microbial control, in line with food contact safety standards, suitable for the production of food packaging grade opening masterbatch. Frequently Asked Questions Q1: Is this silica suitable for twin-screw masterbatch extrusion? A: Yes. The optimized particle morphology ensures good dispersion during compounding, and reduces fish eyes and crystal points in the final masterbatch and film products. Q2: What is the recommended addition amount in opening masterbatch? A: It is recommended to add 3% – 8% in the masterbatch, and the final addition amount in the finished film is controlled at 0.1% – 0.5%. Q3: Will it affect the performance of slip agent in masterbatch? A: It is chemically inert and can be used together with slip agents to balance the opening and sliding properties of the film. Q4: Can you adjust DBP oil absorption for different carrier resins? A: Yes, we can customize the oil absorption index according to your PE or PP carrier resin and masterbatch concentration requirements. Q5: Is the heavy metal index suitable for food packaging masterbatch? A: Heavy metals are strictly controlled: As ≤1ppm, Pb ≤2ppm, Hg ≤0.5ppm, which fully meets the safety requirements of food contact masterbatch. Q6: How about your batch traceability? A: Each batch has full traceability from raw materials to finished products under GMP management system, which can be queried and tracked. Q7: What certifications can you provide for masterbatch export? A: We provide REACH, ISO 22000, HALAL, KOSHER, FDA and other certification documents to support your product registration and export.