Product Description

Amorphous Silica Anti-blocking Agent is a special anti-blocking raw material with both high safety and high performance in the plastic processing industry. As an amorphous silica product prepared via the sol-gel method or environment‑friendly precipitation process, it strictly complies with industry standards, EU EN 14639, Food Contact Material (FCM) regulations and relevant occupational health standards. With ultra-high purity amorphous silica (≥ 99.8%) as the core component, it features no crystalline structure, no sharp edges and high particle sphericity. It forms a uniform and dense micro-protrusion isolation structure in plastic products, effectively reducing the blocking force between plastic films, sheets, pipes and other products. Meanwhile, it has extremely low equipment abrasion, excellent dispersibility and food-grade safety, with no impact on product transparency, mechanical properties and processing performance. Fully compatible with the production of anti-blocking masterbatches and direct addition application for various plastic substrates such as PE, PP, PVC, PET and BOPP, it is the preferred anti-blocking solution for high-end plastic products. (Note: Silica is used to produce anti-blocking masterbatches for corresponding films, which are then applied in film production. Silica shall not be directly incorporated into film resin.)

Technical Parameters

Application

Focusing on the core anti-blocking needs of plastic products, Amorphous Silica Anti-blocking Agent relies on the core advantages of its amorphous structure to provide an efficient, safe and stable anti-blocking solution for various plastic films, sheets, pipes and other products. Its core application values are as follows:

1. Extremely low equipment abrasion, adapted for long-term continuous production: This product features a 100% amorphous structure with no sharp edges of crystalline silica and high particle sphericity. During masterbatch preparation and product processing, the abrasion to extruder screws, die heads, film blowing equipment and slitting knives is reduced by more than 90% compared with crystalline anti-blocking agents, greatly extending the service life of equipment, reducing equipment maintenance costs, and perfectly adapting to long-term continuous high-speed production.

2. High-efficiency anti-blocking, solving blocking pain points in all scenarios: Only 0.2%-0.8% needs to be added to plastic products to form a uniform and stable micro-protrusion isolation layer on the product surface, reducing the contact area between products by more than 60% and the blocking force from 500mN/25 mm to below 50mN/25 mm. It efficiently resolves various industry pain points such as tight plastic film winding, sheet stacking blocking, pipe demolding difficulty and blocking during high-temperature storage, with long-lasting and stable anti-blocking effects.

3. High safety, adapted for food and pharmaceutical grade applications: This product has an amorphous structure with no free crystalline silica, complying with global food contact material standards and occupational health and safety regulations. Meanwhile, it has an extremely low heavy metal content with no harmful substance precipitation, and can be safely applied in high-end compliant scenarios such as food packaging and pharmaceutical packaging with no safety and compliance risks.

4. Excellent compatibility, fully protecting the core performance of products: Relying on custom surface modification technology, it has excellent compatibility with various plastic resin matrices and causes no impact on the core performance of products after addition—PE film maintains a light transmittance of over 90%, a tensile strength decrease of ≤3%, and a heat seal strength retention rate of ≥95%. It features stable performance at a processing temperature of ≤220℃, with no precipitation, no crystal spots and no yellowing, meeting the quality requirements of high-end products.

5. Wide adaptation to all substrates and processes: Fully covering various plastic substrates including PE, PP, PVC, PET, BOPP and CPP, and compatible with various processing technologies such as film blowing, casting, extrusion, biaxial stretching and injection molding. It provides precisely adapted anti-blocking effects for films, sheets, pipes and special-shaped injection molded parts alike, and has excellent compatibility with various additives such as antioxidants, slip agents and antistatic agents, producing a synergistic effect.

Factory Advantages

• Precise control capability of amorphous structure: The product's amorphous structure, sphericity, particle size distribution and pore structure can be precisely controlled through process optimization to ensure 100% no crystalline silica components. Meanwhile, exclusive surface modification solutions can be customized according to carrier resin types, product requirements and processing technologies, precisely meeting the anti-blocking needs of different customers.
• Uncompromising batch stability guarantee: Adopting a fully automated closed-loop production line to achieve precise control of the entire process from raw material synthesis to surface modification, the coefficient of variation of particle size distribution is ≤10%, and the specific surface area difference between batches is ≤3%. This ensures highly consistent crystalline structure, particle size and dispersibility of each batch of products, avoiding product quality problems caused by raw material performance fluctuations, and adapting to large-scale production needs.
• Full-process compliance control capability: A full-process compliance control system from raw material procurement to finished product delivery has been established. Each batch of products can be provided with an amorphous structure test report and a food contact compliance test report, ensuring that the product complies with food contact and occupational health-related laws and regulations of countries around the world, and supporting customers’ compliant production.

Frequently Asked Questions

Q: What is the core difference between this Amorphous Silica Anti-blocking Agent and crystalline silica products?

A: The core differences are mainly reflected in three aspects: first, different crystal structures—this product has a 100% amorphous structure with no sharp edges, causing extremely low equipment abrasion, while crystalline silica has a sharp crystal form that will seriously abrade equipment after long-term use; second, different safety—this product has no free crystalline silica, complying with food contact and occupational health and safety regulations, while crystalline silica has occupational health risks; third, better dispersibility and optical performance—this product has high particle sphericity and better dispersibility, with a smaller impact on product transparency and haze, more adapted to high-end transparent products.

Q: Can this Amorphous Silica Anti-blocking Agent be used in the production of food contact and pharmaceutical packaging grade plastic products?

A: Yes. This product strictly complies with global mainstream food contact material standards such as FDA 21 CFR §177.1520, EU No 10/2011 and China GB 4806.6. Meanwhile, it has no free crystalline silica and an extremely low heavy metal content with no harmful substance precipitation, and can be safely applied in high-end compliant scenarios such as food packaging and pharmaceutical packaging. A complete third-party test report and compliance documents can be provided.

Q: Is the performance of this product stable in high-temperature processing technologies such as high-speed extrusion and biaxial stretching?

A: The performance is stable. This product has excellent thermal stability, with no decomposition, no agglomeration and no yellowing at a processing temperature of ≤240℃. The particle structure remains intact and will not break or agglomerate due to high-temperature processing. It can perfectly adapt to various high-temperature and high-speed processing technologies such as high-speed extrusion, biaxial stretching and casting, with long-lasting and stable anti-blocking effects.

Q: What is the customization cycle for exclusive particle size and modification solutions after small-batch trial use?

A: No long waiting is required. We have modular synthesis and surface modification production lines, which can quickly adjust particle size parameters and modification solutions. The customization cycle can be shortened to 7-10 days. Meanwhile, we provide crystal form testing, performance comparison tests before and after customization and full-process verification services, helping customers quickly complete product adaptation.

Certifications & Honors

• FSSC22000 Food Safety System Certification
• ISO22000:2018 Food Safety Management System Certification
• ISO9001:2015 Quality Management System Certification
• SHC HALAL Certification
• OU KOSHER Certification
• FDA Food Contact Material Certification
• FAMI-QS Feed Additive Quality Management System Certification
• SEDEX Social Accountability Certification
• Food Additive Production License
• Feed Additive Production License
• National High-Tech Enterprise
• Guangzhou Specialized, Sophisticated, Unique and Novel Enterprise
• 17 authorized national patents granted by the National Intellectual Property Administration