Property examples of plastic magnets

It is possible to cut costs by incorporating cheap fillers such as calcium carbonate, talc, kaolin, feldspar, wollastonite, silica. .. or by using recyclates and, to a certain extent, by foaming, which leads to an increase of the volume for the same weight of resin and other expansive ingredients. 

The main non-black fillers are, for example calcium carbonates, broadly used in PVC talcs, broadly used in polypropylene titanium dioxide used as a white pigment clays or kaolins  

ATH used in flame-retardant compounds precipitated silicates micas, wollastonite or calcium metasilicate barium sulphate, used for its opacity to X-rays and high density litho-pone quartz used in flour form. 

The cost savings are very different per weight and per volume. For two fillers with the same price, 10% of the polymer price, but of very different densities, 2 and 5 respectively, cost savings are  

As already seen, the use of mineral fillers not only has economic advantages but also technical advantages (see Table 3.21 showing the performance indices of mineral-filled polyamide) such as  

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Table 3.20 shows property examples of plastic magnets based on ferrites or rare earths. 

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