雙shuang向xiang拉la伸shen聚ju丙bing烯xi土tu工gong格ge柵zha，這zhe種zhong格ge柵zha的de材cai料liao與yu單dan向xiang拉la伸shen聚ju丙bing烯xi土tu工gong格ge柵zha一yi樣yang，化hua學xue性xing質zhi也ye不bu活huo潑po，是shi用yong高gao分fen子zi聚ju合he物wu材cai料liao通tong過guo擠ji出chu過guo程cheng
，然ran後hou再zai縱zong向xiang、hengxianglashenxingcheng。gaicailiaozaizongxianghehengxiangshangdoujuyouhendadelashenqiangdu，zhezhongjiegouzaiturangzhongnenggoutigongyigeliansuoxitong，shiyongyudamianjiyongjiuchengzaidelujizengqiang。