高填充竹塑包装盒盒坯注塑成型工艺及性能研究  

Injection Moulding Process and Performance of Highly Filled Bamboo Plastic Composite Packaging Box

作　　者：江太君 邹思敏 曾广胜[2] JIANG Taijun;ZOU Simin;ZENG Guangsheng(Research and Development Center,Dongguan Mingfeng Packaging Co.,Ltd.,Dongguan Guangdong 523049,China;Key Laboratory of Advanced Materials and Technology for Packaging of Hunan Colleges and Universities,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]东莞铭丰包装股份有限公司技术研发中心,广东东莞523049 [2]湖南工业大学先进包装材料与技术湖南省普通高校重点实验,室湖南株洲412007

出　　处：《包装学报》2018年第2期56-61,共6页Packaging Journal

基　　金：国家科技支撑计划基金资助项目(2014BAD02B06);广东省重大科技专项基金资助项目(2014B090921006);湖南省自然科学杰出青年基金资助项目(13JJ1024)

摘　　要：采用竹纤维与聚烯烃为主要原料,并辅以少量改性与加工助剂,通过同向平行双螺杆挤出造粒线,制备高填充竹塑复合材料颗粒,用于注塑成型包装盒盒坯。研究竹纤维填充量、润滑剂与填料对复合材料加工性能的影响,聚烯烃树脂与填料对成型周期的影响,以及树脂基体、模具温度对包装盒盒坯翘曲变形的影响。研究结果表明:随着竹纤维含量的增加,复合材料的熔融指数快速下降,竹纤维质量分数超过50%后下降速度减缓;润滑剂可以提高复合材料的熔融指数,且内外润滑平衡的复合润滑剂最稳定;滑石粉较碳酸钙更有利于改善复合材料的流动性。聚丙烯比聚乙烯基体复合材料的注塑冷却时间短,滑石粉在缩短冷却时间方面优于碳酸钙。竹塑包装盒盒坯的翘曲变形量随着混合树脂基体中聚丙烯含量的增加而减少,随着模具温度的变化出现波动,最佳模具温度为50℃左右。With the bamboo fiber and polyolefin as the major raw materials plus small amount of modified processing agent, highly filled bamboo plastic composite pellets were prepared by co-rotating parallel twin screw granulate line and further molded into packaging boxes by injection. The effects of fiber content, resin, lubricant and filler on processing performance and molding cycle and the effects of resin composition and mould temperature on packaging box buckling deformation were studied. The results showed that melt flow rate of the composite experienced a sharp decrease with the increase in bamboo fiber content, and the descent rate slowed down after the content exceeded 50%. Lubricant promoted the flowability of the composite and the complex lubricant brought about a more stable performance. Talcum could improve the melt flow index of the composite better than calcium carbonate. Buckling deformation of the bamboo composite packaging box declined with the increase of polypropylene share in the resin and fluctuated with mould temperature. The best mould temperature for the least buckling deformation was about 50 ℃.

关 键 词：竹塑复合材料 包装盒盒坯 注塑成型 翘曲变形 

分 类 号：TQ327[化学工程—合成树脂塑料工业]