Fumed Silica For Silicone Foam/Sponge | China

Project details

  • Industry: LSR/HTV
  • Application: Silicone foam/sponge
  • Product Name: HB-132
  • Location:  Shenzhen, China
  • Problem: This customer is using an international brand of fumed silica. But if fumed silica in high volume, the thickness is highly increased too, which affects the operability of the preparation process of the silicone foam materials and its comprehensive performance. And the supply of this international brand of fumed silica is tight while price is high. To improve quality and reduce costs, this factory is looking for a high add value while low-thickening effect China-made fumed silica for large-scale, high-performance, high-quality silicone foaming material product.

Functions of HIFULL fumed silica in Silicone Foam/Sponge

HIFULL® fumed silica is used as a reinforcing agent in silicone (LSR/HTV) foaming materials. The silicone hydroxyl group (Si-OH) on the surface of HIFULL® fumed silica can form a physical or chemical combination with the foaming silica matrix, forming a matrix molecular adsorbent layer on the surface of the silica, which constitutes a three-dimensional network structure in which the silica particles and the matrix molecules are integrated.

The three-dimensional network structure of silica particles and matrix molecules effectively restricts the deformation of the matrix molecular chain, thus achieving the reinforcing effect and significantly improving the mechanical properties of the foamed material.


Silicone foam is a lightweight, highly elastic material, its polymer’s mechanical properties and resistance to deformation is poor. Fumed silica is an excellent reinforcing agent for silicone foam. We recommend our hydrophobic fumed silica HIFULL® HB-132.

HB-132 is hexamethyldisilazane (HMDS) – treated silica. It can realize high filling and provide excellent reinforcing performance in foaming material systems, and at the same time, it has a very low thickening effect and excellent application maneuverability.

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Product Used

HIFULL® HB-132 (BET=140㎡/g)

HB-132 is Hydrophobic Fumed Silica produced by hydrophilic fumed silica with a specific surface area of 200m2/g after chemical post-treatment with HMDS (Hexamethyldisilazane). Properties Characteristics Properties Unit Typical Value Testing Standard…


Client Feedback

This customer has tested HIFULL HB-132 and has used HB-132 into many their foam products for mass product already.

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