Application of Ground Calcium Carbonate with Different Fineness in PVC Calendering Film
The properties of different fineness of ground calcium carbonate(Nanzhao No.1～8 and Lianzhou No.1～5)from two types of minerals were analyzed,the effects of these different fineness of ground calcium carbonate on the whiteness,tensile strength,heat resistance and covering power of PVC calendering films were studied.The results showed that from Nanzhao No.1 to No.8,the particle size became smaller,the particle size distribution became narrower,the whiteness and oil absorption value increased.The powders from Lianzhou No.1 to No.5 had a similar change in these properties.The whiteness,tensile strength,heat resistance and covering power of PVC calendering films prepared with Nanzhao No.1 to No.8 powders were obviously improved with the increase of the whiteness and fineness of the powder.Among them,PVC calendering film filled with products above No.5 could obtain better overall performance,and Nanzhao No.7 had the best overall performance.PVC calendering films filled with Lianzhou No.1 to No.5 showed little change in whiteness,increased in tensile strength,and the heat resistance and covering power of them were gradually improved.Among them,the products above No.3 could obtain better comprehensive performance,and Lianzhou No.5 had the best comprehensive performance.
ground calcium carbonatePVC calendering filmheat resistancecovering power
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万方数据
