氟弹性体类加工助剂改性双向拉伸薄膜用PP

采用氟弹性体加工助剂母粒(简称母粒)对聚丙烯(PP)进行改性,考察了双向拉伸薄膜用PP(BOPP)的光学性能、力学性能和加工性能。结果表明:母粒对PP结晶度有一定影响,可提高结晶速率,且助剂质量分数为0.06%时对PP结晶度的影响最大;母粒会降低BOPP薄膜雾度,与只在BOPP薄膜的芯层加入母粒相比,在芯层和表层同时加入母粒,更易降低BOPP薄膜雾度;仅在BOPP薄膜芯层加入母粒,薄膜的光泽度更好;薄膜纵向的力学性能有所下降,但都能满足标准要求,母粒还能降低PP熔体表观黏度及剪切应力,改善加工性能。

Fluorinated elastomer PPM-modified BOPP film

The fluorinated elastomer plastic processing masterbatch(PPM)was used to modify polypropylene(PP)to prepare biaxial-oriented polypropylene(BOPP),whose optical properties,mechanical properties and rheological properties were investigated.The results show that PPM accelerates the crystallization rate of BOPP,and which affects crystallinity most obviously when the mass fraction of additive is 0.06%.The BOPP film has lower haze value with the PPM added in the core layer and the surface layer at the same time than in the core layer only,in contrast the opposite is true for gloss.The mechanical properties of the BOPP film decrease in longitudinal direction,meeting requirements of standard.The apparent viscosity and shear stress are reduced by adding PPM,which improves the processing properties of PP melt.