In February 2026, synthetic silica opening agent has become a key additive in the plastic film industry due to its unique properties. Its application scenarios are expanding, gradually replacing traditional opening agents such as talcum powder and oleic acid amide, and becoming the first choice for high-grade film production. The opening agent is synthetic amorphous silica with CAS No.14808-60-7. It achieves anti-blocking mainly by reducing van der Waals force through micro pits and decreasing film contact area via surface protrusions. With a refractive index close to that of plastic resins, it balances opening effect and optical performance.
    Compared with traditional products, silica opening agent has passed FDA certification for food applications, and can also improve film end yellowing, reduce haze, with good dispersibility and low dust. Lingwei Technology's HOMBLOC® series has achieved full coverage of segmented scenarios, suitable for various films such as PET, PP and PE. Its preparation requires precise control of particle size to balance transparency and anti-blocking effect. Typical products have SiO₂ content over 99.5% and whiteness ≥94, becoming a core solution to solve blocking problems in film processing.

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