滑hua石shi粉fen粒li徑jing越yue小xiao，複fu合he材cai料liao的de收shou縮suo率lv越yue小xiao。這zhe主zhu要yao是shi由you於yu聚ju丙bing烯xi在zai冷leng卻que時shi易yi結jie晶jing

，造zao成cheng收shou縮suo。滑hua石shi粉fen粒li徑jing越yue小xiao，比bi表biao麵mian積ji越yue大da，相xiang同tong含han量liang與yu滑hua石shi粉fen表biao麵mian接jie觸chu越yue多duo，相xiang較jiao於yu粒li徑jing較jiao大da的de滑hua石shi粉fen，粒li徑jing較jiao小xiao滑hua石shi粉fen可ke以yi有you效xiao阻zu止zhi塑su料liao材cai料liao的de應ying力li收shou縮suo，降jiang低di收shou縮suo率lv。   

    lingyifangmian
，huashifentianchongdaojubingxizhong
，keyiqidaoyixiangchenghedezuoyong，cujinxingchengxierxiaodeqiujing，zuzhijiaodadeqiujingchansheng，congerjiangdishousuolvhehoushousuo。lijingyuexiao
，bibiaomianjiyueda，yixiangchenghezuoyongyuehao。