Can dimethyl silicone oil solve the problem of dry and dull surface of silica opening masterbatch?
Dimethyl silicone oil can, to a certain extent, address the issues of dry and dull surfaces of silica antiblock masterbatches. The following are the specific reasons:
Dimethyl silicone oil has a low surface tension and can form a uniform film on the surface of silica antiblock masterbatches. This film can reduce the surface tension difference between the masterbatch surface and the surrounding environment such as air, improving the wettability of the surface. The originally dry surface becomes smoother due to the coverage of the silicone oil, and light is reflected more evenly on its surface, thereby enhancing the surface gloss and reducing the dry - looking visual effect.
In the silica antiblock masterbatch system, silica particles tend to agglomerate, which leads to an uneven surface of the masterbatch and affects its gloss and smoothness. Dimethyl silicone oil can reduce the interfacial tension between silica particles and between particles and the carrier resin, helping the silica particles to disperse better in the carrier resin. When the silica particles are uniformly dispersed, the microstructure of the masterbatch becomes more uniform, and the surface is smoother and glossier.
Dimethyl silicone oil has good lubricating properties. During the processing of the masterbatch, it can reduce the friction between particles and between particles and processing equipment. This lubricating effect makes the surface of the masterbatch more delicate during the molding process, avoiding scratches and rough surfaces caused by friction. The resulting masterbatch surface is flatter and its gloss is correspondingly improved.
However, the effectiveness of dimethyl silicone oil is also affected by various factors, such as the addition amount, addition method, compatibility with other additives, and processing technology. If the addition amount is too small, it may not fully exert its surface - improving effect; if it is too large, it may cause other problems, such as affecting the physical and mechanical properties of the masterbatch. Therefore, in practical applications, it is necessary to determine the optimal usage plan through experiments to achieve the desired results.
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