In chemical engineering, filler (packing) refers to inert solid materials, such as Pall Ring and Reschig, which are packed in a packed tower, which is used to increase the atmosphere-liquid contact surface and make it strongly mixed with each other. In chemical products, filler, also known as filler, is used to improve the processing performance, mechanical properties of products and/or reduce the cost of solid materials. which can significantly improve the strength of the filler, such as long fiber and whisker, such as commonly referred to reinforced materials, carbon black weighing filler. Drug tablets, cosmetics and detergents often include solid materials and calcium carbonate as fillers, but the purpose is to adjust the dosage and concentration rather than improve performance, it should be called thinner. Plastic plasticizer, rubber oil and spinning oil agent, although can improve performance, but also can affect the cost, but the habit of these liquid materials as processing aids.
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