Economical Anti-blocking Silica | Cost-effective for Industrial Packaging & Agricultural Films Manufactured by Shandong Zhonglian Chemical Co., Ltd. General-purpose industrial grade precipitated silica anti-blocking agent. Delivers reliable and stable anti-blocking performance with proven mature production technology. Large-scale manufacturing ensures highly competitive pricing and consistent bulk supply, ideal for cost-sensitive general film production. Get Bulk Quote · Check Stock Availability Product Information This economical grade anti-blocking silica from Shandong Zhonglian Chemical Co., Ltd. is developed for general industrial film and agricultural film markets. Based on mature and stable precipitation process, it provides dependable anti-blocking effect at a more competitive cost, serving as a cost-effective alternative to imported premium grades for customers who pursue balance between performance and cost. The product features uniform particle size and stable anti-blocking efficiency, and can adapt to common blown film, cast film and extrusion processes. It works effectively in solving film blocking issues during winding, storage and unwinding for general-purpose films, while maintaining acceptable optical and mechanical properties. Benefiting from large-scale production capacity and optimized manufacturing cost, this grade offers outstanding price advantage while keeping qualified and consistent quality. We maintain long-term stable stock and flexible delivery capacity, which can fully support large-volume continuous production of industrial film manufacturers. Product Appearance White amorphous powder with uniform particle size, stable quality and reliable performance, meeting the requirements of general industrial film production. Product Parameters 表格 Item Specification SiO₂ Content (Ignited Basis) ≥ 96.0% Loss on Ignition (1000℃, 1h) ≤ 9.0% Moisture (As Packed, 105℃, 2h) 3.0 – 6.0% pH (5% Water Suspension) 6.0 – 7.5 Bulk Density 0.20 – 0.30 g/cm³ DBP Oil Absorption 70 – 120 cm³/100g Median Particle Size (D50) 4 – 8 μm BET Surface Area 90 – 150 m²/g Whiteness (CIE L*) ≥ 96.0 Heavy Metal Limits Arsenic ≤2ppm, Lead ≤3ppm, Mercury ≤1ppm Core Material Amorphous precipitated silica Primary Application General industrial packaging film, agricultural film, common PE bags Product Features 1. Stable & Reliable Anti-blocking Performance Proven formulation and mature process deliver consistent anti-blocking effect, effectively solving film adhesion problems in general film production and daily use. 2. Highly Competitive Cost Advantage Large-scale automated production and optimized process significantly reduce manufacturing cost, helping customers cut down raw material procurement expense. 3. Large Production Capacity & Stable Supply Sufficient production capacity and raw material reserve ensure stable supply for bulk orders, avoiding delivery shortage affecting customers’ continuous production. 4. Broad Process Adaptability Compatible with common blown film, cast film and masterbatch extrusion processes, suitable for most general-purpose polyolefin film production lines. 5. Consistent Batch Quality Standardized production management and quality inspection ensure stable performance between batches, meeting the quality requirements of large-scale industrial production. Core Advantages Significantly Reduce Procurement Cost Compared with premium grades, this economical version can greatly reduce raw material cost while maintaining qualified anti-blocking function, improving the price competitiveness of customers’ end products. Reliable Bulk Supply for Large-scale Production With annual large-scale production capacity and stable raw material supply chain, we can guarantee continuous delivery for long-term bulk orders and support customers’ full-load production. Usage & Storage Instructions 1.Recommended addition ratio: 0.15% – 0.6% in finished film; 3% – 8% in opening masterbatch. Adjust dosage according to film thickness and required anti-blocking level. 2.Suitable for conventional blown film, cast film and extrusion processes, no special equipment modification required. 3.Can be used alone or combined with general slip agents to balance opening and sliding performance according to actual needs. 4.Ensure uniform dispersion during processing to avoid local agglomeration affecting film surface quality. 5.Storage: Store in dry and ventilated warehouse, seal packaging after opening to prevent moisture absorption. Normal shelf life is 24 months under proper storage. Application Scenarios General Industrial Packaging Film Suitable for all kinds of ordinary industrial packaging films, express packaging films and outer protective films with cost priority. Agricultural Greenhouse & Mulch Film Widely used in agricultural greenhouse film, mulch film and silage film, providing stable anti-blocking performance for outdoor application scenarios. PE Shopping & Express Bag Film Ideal for ordinary PE shopping bags, express bags and daily-use packaging films, balancing opening performance and production cost. General-purpose Opening Masterbatch Suitable for producing cost-effective general opening masterbatch for downstream common film markets. Frequently Asked Questions Q1: How is the cost performance compared with imported silica? A: This industrial grade provides comparable basic anti-blocking performance at a significantly lower price, offering excellent cost-effectiveness for general film applications. Q2: What is your minimum order quantity for this grade? A: We support flexible order quantities. For bulk orders, we offer more favorable tiered pricing. Please contact our sales team for specific quotation. Q3: What is the typical lead time for bulk orders? A: For regular specifications, we maintain stable stock and can arrange delivery within short lead time. For large volume orders, we can also guarantee scheduled delivery according to your production plan. Q4: Is it suitable for agricultural mulch film? A: Yes, it provides stable anti-blocking effect and good weathering stability, suitable for agricultural film and outdoor film applications. Q5: Can it be used on ordinary blown film lines? A: Yes, it adapts to conventional single-screw and twin-screw blown film processes without additional equipment adjustment. Q6: Does it affect the printing performance of the film? A: Under normal addition amount, it will not cause obvious adverse effect on film printing and heat sealing performance. Q7: Can you customize specifications for special requirements? A: We can adjust particle size range and other indicators according to customers’ specific application needs. Please contact us for detailed discussion.