聚乙烯/纳米硫酸钙粉体复合软包装应用性能研究  

Study on application performance of polyethylene/CaSO_(4) nanoparticle composite flexible packaging

作　　者：吴雄杰 朱东波 孙江波 高龙美 储雨 程劲松 谢爱迪 WU Xiongjie;ZHU Dongbo;SUN Jiangbo;GAO Longmei;CHU Yu;CHENG Jinsong;XIE Aidi(Anhui Province Packaging and Printing Product Quality Supervision and Inspection Center,Tongcheng 231400,China;National Polymer Material Quality Inspection and Testing Center(Anhui),Tongcheng 231400,China;Shenzhen Xingwang Environmental Protection Substitute Plastic Materials Co,Ltd,Shenzhen 518000,China;School of Management,University of Science and Technology of China,Hefei 230000,China)

机构地区：[1]安徽省包装印刷产品质量监督检验中心,安徽安庆231400 [2]国家高分子材料质量检验检测中心(安徽),安徽安庆231400 [3]深圳兴旺环保代塑材料有限公司,广东深圳518000 [4]中国科学技术大学管理学院,合肥230000

出　　处：《中国塑料》2022年第6期10-15,共6页China Plastics

基　　金：安徽省重点研发与开发计划项目(2022i01020018)。

摘　　要：采用含有51%的纳米硫酸钙(CaSO_(4))与聚乙烯(PE)为主要原料,通过熔融共挤制备了一种绿色低碳可降解的新型环保复合薄膜,并与同等碳酸钙(CaCO_(3))含量的PE/CaCO_(3)复合薄膜比较,研究高填充无机纳米聚烯烃复合软包装材料的应用性能。采用拉力试验机、高温凝胶色谱仪、氙灯日晒老化试验箱、总有机碳(TOC)分析仪等设备对其物理性能、卫生性能、降解性能、碳含量进行测试分析。结果表明,PE/CaSO_(4)复合薄膜的拉伸强度、断裂伸长率优于同等含量的PE/CaCO_(3)复合薄膜,总迁移量(水、4%乙酸、20%乙醇、95%乙醇、异辛烷)、高锰酸钾消耗量、重金属未超出国家标准的限量要求,在加速老化条件下,其拉伸性能和重均分子量均能达到光降解塑料的要求,且其碳含量远较其他塑料薄膜要低。A new type of green,low-carbon and degradable eco-friendly composite film was prepared by melt co-extrusion based on the composition of 49 wt % polyethylene(PE)and 51 wt % CaSO_(4)nanoparticles,and its application performance as flexible packaging was investigated by comparing with the PE/CaCO_(3)composite film at the same loading. The application performance,hygienic performance,degradation performance,carbon content of the PE/CaSO_(4)composite film were measured using tensile testing machine,high temperature gel chromatograph,xenon lamp sun aging test chamber,and total organic carbon analyzer. The results indicated that the composite film obtained better tensile strength and elongation at break of the PE/CaSO_(4)composite film than the PE/CaCO_(3)one at the same loading of filler. Its total migration,including water,4 % acetic acid,20 % ethanol,95 % ethanol,isooctane,the consumption of potassium permanganate,and heavy metals did not exceed the limit requirements of national standards. Under accelerated aging conditions,the tensile properties and weight-average molecular weight of the composite film could meet the requirements of photodegradable plastics,and its carbon content was much lower than other plastic films. The promotion and applications of the PE/CaSO_(4)composite flexible packaging can offer an important guiding significance for the promotion of national carbon reduction and emission reduction policies.

关 键 词：硫酸钙 聚乙烯 物理性能 卫生性能 降解性能 碳含量 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]