PP成cheng本ben端duan的de支zhi撐cheng作zuo用yong有you所suo減jian弱ruo
，加jia之zhi終zhong端duan采cai購gou臨lin近jin收shou尾wei階jie段duan，前qian期qi原yuan料liao價jia格ge持chi續xu處chu於yu高gao位wei，導dao致zhi工gong廠chang進jin一yi步bu補bu庫ku的de意yi願yuan不bu高gao。受shou昨zuo日ri期qi貨huo價jia格ge下xia行xing影ying響xiang，市shi場chang交jiao投tou正zheng逐zhu步bu向xiang基ji本ben麵mian理li性xing回hui歸gui，預yu計ji短duan期qi內nei聚ju丙bing烯xi價jia格ge將jiang以yi消xiao化hua前qian期qi漲zhang幅fu為wei主zhu。