汽车用薄壁注塑高流动高刚性聚丙烯复合材料的制备及表面优化  

Preparation and Surface Optimization of Thin-wall Injection Molded Polypropylene Composites with High Flow and Rigidity for Automobiles

作　　者：汪理文 翁永华 郑帅 丁贤麟 吴丽敏 WANG Li-wen;WENG Yong-hua;ZHENG Shuai;DING Xian-lin;WU Li-min(Suzhou Runjia Engineering Plastics Co.,Ltd.,Suzhou 215122,Chnia;Yancheng Institute of Technology,Yancheng 224001,China)

机构地区：[1]苏州润佳工程塑料股份有限公司,江苏苏州215122 [2]盐城工学院,江苏盐城224001

出　　处：《塑料工业》2021年第3期54-58,共5页China Plastics Industry

摘　　要：该论文为汽车用薄壁注塑高流动性高刚性聚丙烯(PP)复合材料的制备及优化。通过在配方中组合采用高流动抗虎皮纹PP、包覆型滑石粉母粒(解决滑石粉与PP的相容性)、三元共聚PP(解决乙烯-辛烯共混物(POE)与PP的相容性)三种主要材料,以及K树脂、有机硅和其他助剂,再结合薄壁注塑模具在加强筋、卡扣部位的专门设计,结合了材料结晶、流动性、分散性、相容性、剪切黏度以及工艺等因素,得到了汽车用薄壁注塑高流动性高刚性PP复合材料。其密度1.05 g/cm^(3),熔体质量流动速率45 g/10min,弯曲模量1919 MPa,冲击强度42 kJ/cm^(2),拉伸强度19 MPa,成型品厚度2.1 mm(≤2.2 mm),制得的部件表面无缩痕、无变形。The preparation and optimization of thin-walled injection molding high-fluidity and high-rigidity polypropylene composite materials for automobiles were introduced.A thin-wall injection molding high-fluidity and high-rigidity polypropylene composite material for automobiles was obtained by using the combination of high-flow anti-tiger skin texture polypropylene(PP),coated talc masterbatch(to solve the compatibility of talc and PP),ternary copolymer PP[to solve the compatibility of ethylene and octene copolymer(POE)and PP]three main types,as well as K resin,silicone and other additives,combining with the special design of the thin-wall injection mold in the reinforcement and buckle parts,comprehensively combining the crystallization,fluidity,dispersion,compatibility,shear viscosity and process and other factors.The materials have a density of 1.05 g/cm^(3),a melt index of 45 g/10min,a flexural modulus(maximum)1919 MPa,and an impact strength of 42 kJ/cm^(2).The tensile strength is 19 MPa,the thickness of the molded product is 2.1 mm(≤2.2 mm),and the surface of the manufactured part has no sink marks or deformation.

关 键 词：薄壁注塑 聚丙烯 高流动性 高刚性 虎皮纹 缩壁 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]