求翻译：聚丙烯是五大通用塑料之一，但它的成型收缩率大、易翘曲变形等缺点，限制了其在结构材料和工程塑料方面的应用。碳酸钙是无机填料，与聚丙烯的相容性较差，所以在使用前需进行活化处理，以提高碳酸钙与聚合物分子链的结合力，提高填充聚丙烯材料的力学性能是什么意思？

Polypropylene is one of the five general-purpose plastics, mold shrinkage, easy to warpage and other shortcomings, limiting its application to structural materials and engineering plastics. Calcium carbonate is the poor compatibility of the inorganic filler, and polypropylene, and the need for activ

Polypropylene is one of 5 large universal plastic one, but it's shaped shrink rate, easy-to-warpage such shortcomings, and restricted in their structural materials and the application of engineering plastics. Calcium carbonate is a inorganic filler, and the compatibility of polypropylene is poor, so

The polypropylene is one of five big general plastics, but its formation shrinkage big, shortcomings and so on easy warp distortion, has limited it in the structural material and the engineering plastics aspect application.The calcium carbonate is the inorganic padding, is bad with the polypropylene

Polypropylene is one of the five General plastic, but the molding shrinkage, warpage and other shortcomings, limits their application in structural materials and engineering plastics. Calcium carbonate is the inorganic filler, and poor compatibility of polypropylene, so needs to be activated before

正在翻译，请等待...