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Application of fumed silica in plastics

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The fumed silica has many other properties in addition to reinforcement in plastics. The good light transmittance and small particles of fumed silica can make the plastic dense. Especially for translucent plastic films, the addition of fumed silica not only improves the transparency, strength and toughness of the film, but more importantly, it greatly improves the waterproof performance. Experiments have shown that the conventional PVC (polyvinyl chloride) film has a water permeability 1.5 times higher than that of the fumed silica. This shows that the waterproofness of the PVC film to which the fumed silica is added is greatly improved. Such films can be used as advanced plastic films for special applications.

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