Anti-Blocking Silica (Opening Agent) | Premium Product Solutions by Shandong Zhonglian Chemical Product Overview As a leading silica material manufacturer with over 30 years of industry expertise, Shandong Zhonglian Chemical Co., Ltd. has independently developed this high-performance anti-blocking silica (also widely known as silica opening agent) — a purpose-built functional material designed to solve the core pain points across plastics, film, coating, and packaging industries. For downstream manufacturers, common production and application challenges include product surface adhesion, poor slip performance, and difficult opening of films and finished goods, all stemming from insufficient surface roughness and low lubricity of traditional additives. Our anti-blocking silica addresses these issues head-on. Leveraging advanced fumed and precipitation production processes, paired with industry-leading precision particle size control technology, our product delivers exceptional anti-blocking and slip properties, alongside outstanding dispersibility, heat resistance, and resin compatibility. It significantly boosts processing efficiency and end-use performance of downstream products, and has been widely adopted in BOPP films, PE/PVC films, plastic packaging, coatings, inks and more. Our products are exported to over 20 countries and regions across Europe, Southeast Asia, and the Middle East, earning high recognition from domestic and global customers. Core Advantages of Our Anti-Blocking Silica 1. Superior Anti-Blocking & Slip Performance for Stable Processing Our anti-blocking silica features a unique porous structure and precisely controlled particle size distribution (primary particle size 10–100nm, agglomerate particle size 1–20μm), which forms a uniform micro-rough surface on the substrate when added to films or plastic products. This structure effectively reduces the contact area between material surfaces, lowers the coefficient of friction to 0.1–0.3, and delivers an industry-leading anti-blocking effect (blocking force ≤ 0.5N/25mm). It fundamentally eliminates product adhesion issues during storage, high-speed production, slitting, printing, and bag-making, ensuring smooth opening of films and increasing downstream processing efficiency by up to 30%. The product also maintains excellent thermal stability from -50℃ to 250℃, fully adapting to high-temperature processing such as film blowing, extrusion, and casting. 2. High-Purity Formulation for Multi-Scenario Compliance & Adaptability Strictly aligned with global material standards for diverse industries, our anti-blocking silica has a purity of over 99.5% with extremely low impurity content, with heavy metals (lead, arsenic, mercury, etc.) limited to ≤10ppm. This makes it fully suitable for demanding scenarios including food contact materials, medical packaging, and high-end industrial materials. Our product complies with national standard GB/T 20020-2013 Fumed Silica, as well as international regulations including U.S. FDA food contact standards and EU REACH requirements. The entire production process is completed in GMP-certified workshops and ISO Class 8 clean rooms, with a full-chain quality control system established from raw material selection (we use only high-purity quartz sand) to finished product delivery, ensuring safe and reliable performance across different industries and regions. 3. Outstanding Dispersibility & Resin Compatibility Powered by advanced surface modification technology (silane coupling agent treatment) and precision particle size regulation, our anti-blocking silica delivers exceptional dispersibility in organic systems including polyethylene (PE), polypropylene (PP), and polyester (PET). It achieves uniform, agglomerate-free dispersion even under low-speed mixing, with dispersion efficiency over 30% higher than traditional anti-blocking agents. It has excellent compatibility with all mainstream resins and common additives (antioxidants, slip agents, antistatic agents, etc.), does not compromise the transparency, color, or mechanical properties of the base material, and maintains stable performance during long-term use. For film products, it can even improve light transmittance by 5%–10% while enhancing anti-blocking performance, solving the long-standing industry trade-off between opening effect and optical properties. 4. Full-Dimensional Customization for Tailored Solutions We provide end-to-end customization services to meet the unique needs of different industries. We can tailor particle size distribution, surface modification type (methylsilane, vinylsilane, aminosilane, etc.), and performance grade (general industrial grade, food contact grade, high-transparency grade) based on your specific application. Our technical team designs personalized solutions aligned with the process characteristics of different fields: for example, we develop high-transparency anti-blocking silica for BOPP packaging films, food-grade opening agents for food contact plastic products, and high-temperature resistant grades for engineering plastic processing. 5. Full-Lifecycle Technical Support & Service Guarantee We provide comprehensive "pre-sales, in-sales, after-sales" full-lifecycle technical support for every customer: - Pre-sales: We provide 3–5 free samples with different parameters for testing based on your formulation and process needs, and our professional technical team designs optimized application schemes including recommended addition ratio and mixing process. - In-sales: We can dispatch technical personnel to provide on-site guidance for key production links such as feeding sequence and dispersion speed, ensuring optimal product performance. - After-sales: We have a 24-hour rapid response mechanism to provide targeted solutions for any application issues such as poor dispersion or insufficient anti-blocking effect, maximizing the value of our products for your production. Unmatched Production & Quality Assurance Shandong Zhonglian Chemical Co., Ltd. is a national high-tech enterprise and a "Specialized, Refined, Differential and Innovative" enterprise in Shandong Province, with deep roots in the silica material industry for over 30 years. We hold 20 invention patents and 5 utility model patents, and have built a leading domestic production base for fumed and precipitation method anti-blocking silica, with an annual output of 10,000 tons. Our facility is equipped with advanced testing equipment including laser particle size analyzers, friction coefficient testers, and high-performance liquid chromatographs. We have established 32 full-process testing procedures covering raw material purity testing, intermediate product particle size control, and finished product anti-blocking performance verification. We have obtained ISO9001 quality management system, ISO14001 environmental management system, ISO45001 occupational health and safety management system, and GMP certification, realizing full-chain standardized control from R&D and production to quality inspection. Packaging, Storage & Global Shipping Specifications Standard Packaging Options We adopt a standardized layered packaging design to meet diverse order needs: - 25kg/bag: Inner PE vacuum bag + outer kraft paper composite woven bag - 500kg bulk bag: Inner PE film + outer reinforced woven bag - Tank truck transportation solutions available for bulk orders Professional Moisture-Proof Protection To meet the storage requirements of silica products, we offer dual moisture-proof protection schemes: 1. Inner vacuum PE bag + middle aluminum-plastic composite film + outer wear-resistant woven bag 2. Inner inert gas-filled PE bag + outer anti-static woven bag Both solutions effectively isolate moisture, oxygen, and dust, preventing the product from moisture absorption or contamination during transportation and storage. Storage & Transportation Requirements - Storage: Store in a cool, dry, well-ventilated airtight warehouse, away from direct sunlight, rain, and heat sources, with warehouse relative humidity controlled below 60%. - Shelf life: 36 months under standard storage conditions. - Transportation: The product is a non-hazardous chemical, supporting global delivery via sea, land, and air freight. Avoid extrusion, collision, and rain soaking during transportation. Standardized Labeling Each batch of product packaging is strictly labeled with product name (anti-blocking silica/opening agent), model, particle size, grade, net weight, production batch number, production date, shelf life, production license number, and safety warnings. Multi-language labels can be customized according to customer needs to ensure compliance with regulatory requirements in different countries and regions. Key Application Industries & Scenarios Our anti-blocking silica has a wide range of application scenarios, covering multiple core industries: - Plastic Film Industry: Used as anti-blocking agent and slip agent in BOPP, PE, PVC, PET, CPP films (including packaging films, agricultural films, adhesive films), preventing film adhesion, improving opening performance and processing efficiency, while maintaining film transparency. - Plastic Packaging Industry: Applied to plastic bottles, caps, food packaging boxes and other products to enhance surface slip performance, prevent mutual adhesion during storage and transportation, and improve end-user experience. - Coatings & Inks Industry: Used as a matting agent and anti-blocking agent in wood coatings, industrial coatings, printing inks, etc., to improve surface roughness, prevent film adhesion after stacking, and enhance scratch resistance. - Food Contact Materials: Used in FDA-compliant food packaging films, disposable tableware and other products, ensuring safe use while solving product blocking issues. - Other Industries: Also applicable to rubber products (improving slip and anti-blocking performance), electronic packaging materials (anti-blocking and moisture-proof), and more, adapting to the needs of different industries with its diversified properties. Why Partner With Shandong Zhonglian Chemical? Our anti-blocking silica (opening agent) is built on the core positioning of "precision particle size control, multi-scenario compatibility, and strict quality assurance". Backed by 30+ years of industry experience, advanced production technology, and a full-chain service system, we provide customized anti-blocking silica solutions for customers across various industries worldwide. We are committed to driving the upgrading of downstream industries with high-performance, reliable silica products. We sincerely welcome domestic and international customers to contact us for consultation, free sample testing, and in-depth cooperation. --- SEO Optimization Notes (Google-Friendly) 1. 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