软包装材料微观结构与溶剂残留研究  

Research on Microstructure and Solvent Residue of Flexible Packaging Material

作　　者：李东立[1] 张敬勇[1] 许文才[1] 付亚波[1] 

机构地区：[1]北京印刷学院印刷包装材料与技术北京市重点实验室,北京102600

出　　处：《包装工程》2013年第7期1-6,共6页Packaging Engineering

基　　金：北京市教委人才强教项目(IHLB No.PXM2010_014223_095557);科委面上项目(KM201110015001;KM2012 1001 5003);实验室建设项目(PXM2012_014223_000039);"高分子物理相似相容原理的实践教学"教改项目

摘　　要：用纳米二氧化硅与聚丙烯树脂熔融共混,通过改变聚丙烯的结晶度、玻璃化转变温度、溶度参数的手段,来降低聚丙烯对有机溶剂的吸附性、溶解性和扩散性,进而降低印刷后聚丙烯薄膜中有机溶剂的残留。实验表明,纳米二氧化硅能够明显提高聚丙烯的结晶度,提高其玻璃化转变温度,降低聚丙烯无定形区的比例,改性后的聚丙烯不但对非极性溶剂表现出低的残留值,而且对常见极性溶剂的溶解性也有较大程度的降低。Polypropylene resin was melt blending with nano-silica to reduce the adsorption, solubility, and diffusivity of polypropylene against organic solvent by means of changing crystallinity, glass transition temperature, and solubility parameter of polypropylene. As a result, the solvent residue value of polypropylene film after printing was reduced. The experiments showed that nano-silica can significantly improve crystallinity and glass transition temperature of polypropylene, and reduce the proportion of amorphous region ; the modified polypropylene shows a low residual value against not only non-polar solvent but also common polar solvent.

关 键 词：溶剂残留 聚丙烯 包装材料 玻璃化转变温度 溶度参数 

分 类 号：TB484.3[一般工业技术—包装工程] TB487