长玻纤增强PP微发泡注塑工艺  

Long Glass Fiber Reinforced PP Microcellular Injection Molding Process

作　　者：孙文博[1] 信春玲[1] 何亚东[1] 翟玉娇 闫宝瑞[1] Sun Wenbo;Xin Chunling;He Yadong;Zhai Yujiao;Yan Baorui(College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学机电工程学院,北京100029

出　　处：《工程塑料应用》2022年第8期72-78,共7页Engineering Plastics Application

摘　　要：选用长玻纤增强聚丙烯(PP/LGF)为原料,利用扫描电子显微镜(SEM)具体分析了不同发泡质量下的制品截面,利用DOE软件分析工艺参数对纤维断裂的影响,通过减重率将制品的平均残余纤维长度、泡孔结构与力学性能建立联系,最终给出合理工艺建议。得出以下结论,纤维增强微发泡复合材料具有明显“三明治”结构;与未发泡制品相比,微发泡制品内平均残余纤维长度提高了25.1%~89.6%;注气量与注塑压力对平均残余纤维长度影响较为显著,提高平均纤维残余长度可以降低发泡对制品带来的力学损失;在实际生产过程中,首先需要考虑产品目标的减重比,根据减重比的大小来调控平均残余纤维长度以及其发泡质量,以达到目标减重比的同时减少力学性能的损失。Using long glass fiber reinforced polypropylene(PP/LGF)as raw material,the cross-section of the product under different foaming qualities was analyzed by scanning electron microscope,and the influence of process parameters on fiber breakage was analyzed by DOE software.Average residual fiber length,cell structure and mechanical properties were linked through the weight reduction rate,and finally reasonable process suggestions were given.The conclusions are as follows,fiber-reinforced microfoamed composites have an obvious“sandwich”structure;compared with unfoamed products,the average residual fiber length of microfoamed products is increased by 25.1%-89.6%.The average residual length has a significant impact,and increasing the average residual fiber length can reduce the mechanical loss caused by foaming to the product;In the actual production process,the weight reduction ratio of the product target needs to be considered first,and the average residual fiber length and its development need to be regulated according to the weight reduction ratio.The quality of the foam is reduced to achieve the target weight loss ratio while slowing down the loss of mechanical properties.

关 键 词：长玻纤增强聚丙烯 微发泡注塑 纤维断裂 工艺参数 力学性能 

分 类 号：TQ328[化学工程—合成树脂塑料工业]