PPA在LLDPE/LDPE薄膜加工中的应用  

Appilcation of Dynamar PPA in the processing of LLDPE/LDPE Agriculture Films

作　　者：景遐斌[1] 宋玉春[1] 郝克君 姜诚德[1] 闫春珍[1] 王洪毅 岳凤霞 杨生 毛茹杰 Stiff,D.W. Adair,E.W Horna,J.H Zhao,Y.H 

机构地区：[1]中国科学院长春应化所 [2]辽源市塑料四厂 [3]美国ＤＹＮＥＯＮ公司

出　　处：《塑料科技》1997年第5期11-14,共4页Plastics Science and Technology

摘　　要：本工作以ＬＬＤＰＥ／ＬＤＰＥ共混树脂为基料，添加氟弹性体ＰＰＡ加工改性剂，采用挤出吹塑成型加工薄膜制品．ＬＬＤＰＥ／ＬＤＰＥ＝１／２为空白．添加５００ＰＰＭ的ＰＰＡ后，共混物中ＬＬＤＰＥ为１／３时，挤出机电流下降，薄膜的透光率增加，雾度降低；ＬＬＤＰＥ含量为６０％时，挤出机电流未变而产量提高，薄膜的透光率和雾度变化不大；继续增加ＬＬＤＰＥ比例时，挤出机电流和薄膜雾度增加．薄膜的拉伸性质随ＬＬＤＰＥ比例增大而显著提高，且纵横向的取向性变小．Plastic films were blown from blends of LLDPE/LDPE added with the plastic processing addditives(PPA)from Dyneon, USA. The concentration of PPA in the blends was 500ppm. The extrusions were successfully conducted for the blends of LLDPE/LDPE in which LLDPE contents wer 33, 60, 70 and 80%, respectively, on the conventional 65 extruder designed originally for LDPE films. Compared to the control trial with LLDPE content of 33%, the trials with PPA showed lower power consumption of the extruder, higher transparency and lower haziness of the films extruded. When LLDPE content was 60%, the power consumption did not increase but the extrusion output was increased and the transparency and haziness did not change appreciatively. During the trial extrusions with LLDPE content of 70 or 80%, higher power consumption was observed. The mechanical properties were measured for the films obtained. The tensile strength and elongation at break were increased with increasing LLDPE content in the blends and the difference in the machine and the transverse direction was lowered.

关 键 词：氟弹性体 改性 农用薄膜 聚乙烯 橡塑共混 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业] TQ334.9