High-purity silica anti-blocking agent suitable for PE, BOPP, and CPP films.
KosNature is a globally leading supplier of high-purity (99.5%) synthetic and natural silica anti-blocking agents, headquartered in Guangzhou, China. Our advanced anti-blocking additives are designed to reduce adhesion between films and lower the coefficient of friction (COF) to <0.25. They effectively enhance opening performance while maintaining over 92% film transparency, making them ideal for film manufacturers worldwide.
Key Technical Specifications of KosNature Silica Antiblock
| Technical Property | Synthetic Silica Grade | Natural Silica Grade | Test Method |
| SiO₂ Content (Kesucian) | ≥ 99.5% | ≥ 98.0% | ASTM X-Ray Fluorescence |
| Average Particle Size (D₅₀) | 2.5 – 4.5 μm | 5.0 – 8.0 μm | Laser Diffraction (Malvern) |
| Recommended Loading Level | 0.1% – 0.3% | 0.2% – 0.5% | Downstream Masterbatch |
| Refractive Index | 1.46 | 1.48 | Matches PE/PP Matrix |
Industrial Applications and Performance Advantages:
Premium Silica Anti-Blocking Agent for PE Blown Film:
If you are using blown PE film for heavy-duty and agricultural applications, our high-purity amorphous silica is specifically designed for this purpose. It creates a uniform microscopic surface roughness, reducing the contact area between films. Furthermore, it exhibits ultra-low adhesion (< 15 g/cm) during high-temperature summer roll storage. Generally, we recommend an addition as low as 0.15% to maintain film processing stability without causing screw slippage. You can also adjust the addition amount according to the film thickness.
High-Transparency Anti-Blocking Agent for BOPP Packaging Film:
If you want to maintain optical transparency for biaxially oriented polypropylene (BOPP) films, KosNature’s silica additives meet your needs. Our product has a refractive index of 1.46. Our team optimizes the particle size distribution to perfectly match the PP matrix, ensuring that you can control film haze increase to below 1.5%. It supports high-speed automated packaging at speeds exceeding 400 m/min without scratches or dust shedding.
Heat-resistant anti-blocking additive for CPP cast films:
Our synthetic amorphous silica exhibits excellent thermal stability, preventing gel formation and degradation spots. If you wish to improve slitting and printing efficiency after film extrusion, our silica has extremely low static and dynamic coefficients of friction. It exhibits zero weight loss at temperatures up to 600°C.
Why choose KosNature as your anti-sticking agent manufacturer?
1. Quality Assurance: We used advanced production equipments to ensures zero crystalline Silica contamination. our high purity achieves 99.5%. We can provide you with stable optical performance and excellent compatibility with anti-sticking masterbatches.
2.Global Supply Chain and Logistics: We have mature logistics team located in Guangzhou, China, where close to Nansha port. can support you a flexible and prompt shipment for global plastic film manufacturers and distributors.
3.On-demand technical support: We can customize quality according to your PE/PP film application base on the mature technology of our R&D team, which also cooperate with famous universities.
4.Sufficient capacity support: We have 3 standards production lines to achieve a production capacity of 5,000 tons per year and more, which assures us capacity supply is stable.
Frequently Asked Questions (Soalan lazim)
A1: Larger particle sizes will result in higher micro-roughness, significantly reducing adhesion, but will slightly increase film haze. For high-transparency films (Ketebalan < 50 μm), we recommend using 3 μm silica particles, which achieve the best balance between a low coefficient of friction (COF) (< 0.25) and excellent optical transparency.
A2: Ya, we offer free product sample packs ranging from 1kg to 2kg to global plastic film manufacturers and color masterbatch producers for laboratory blown film or cast film tests. Please contact the team at sales@kosnature.com to request a sample immediately.
A3: Of course it applies. Our amorphous silica is a 100% inorganic, safe and inert mineral material. It can be perfectly mixed with bio-based resins such as PLA, PBAT and PHA, significantly enhancing the opening performance of the environmentally friendly film without affecting its final biodegradability or mechanical properties.
