化学发泡法挤出PE低发泡材料研究

STUDY ON EXTRUDE PE LOWEXPANDINGMATERIAL WITH METHOD OF CHEMICAL FOAMING

采用化学交联、化学发泡法挤出了低发泡ＰＥ棒材．研究发现，当口模温度为１７０℃左右、螺杆转速为５５ｒ／ｍｉｎ～６４ｒ／ｍｉｎ时，熔体的黏度、弹性适合发泡；而当每１００ｇＰＥ中，ＡＣ用量为２ｇ，ＤＣＰ用量为０．２ｇ～０．４ｇ，ＺｎＯ＋Ｚｎ（Ｓｔ）２用量为２ｇ时，可以得到外观光滑、手感好、泡孔细密的ＰＥ低发泡材料．

he extrusion process of the PE lowexpanding bar is made with method of chemical blowing and chemical crosslinking.When mouthpiece temperture is about 170 and screw revolution speed is 55 r/min￣64 r/min,melt viscosity and elasticity is best suited to enpand.In 100 g PE,when the content of AC is 2 g,the content of DCP is 0.2 g￣0.4 gand the content of ZnO+Zn(St)2 is 2 g,PE low expanding is obtained that the suface is smooth and the cell is close.