聚合物薄膜微流控芯片拉伸成形规律研究

Investigation on the Deep Drawing Rule of Polymer Film Microfluidic Chip

为研究聚合物材料在拉伸过程中的成形规律,促进聚合物材料在微流控芯片中的使用,以聚丙烯微流控芯片为研究对象,利用设计加工好的拉伸成形模具,在聚丙烯薄膜上成形出微结构,将成形件剖开放在工具显微镜下观察成形情况,参照金属材料拉伸过程将微结构处划分为凸缘区、凹模圆角区、筒壁区、凸模圆角区和筒底区5个区域,分区域观察聚合物材料的流动情况.实验结果表明,聚丙烯材料拉伸成形过程中,凸缘区不参与变形,筒底区和筒壁区参与变形,筒壁区变形程度比筒底区大,材料厚度变化程度大.

In order to study the forming law of polymer materials in the drawing forming and promote the use of polymer materials in microfluidic chips,polypropylene microluidic chips were used as the research object.A microstructure is formed on the acrylic film,and the molded part is opened to observe the forming condition under a tool microscope,and the microstructure is divided into a flange area,a matrix corner area,a cylinder wall area,and a punch circle according to the metal material drawing process 5 areas of corner area and bottom area,observe the flow of polymer material in different areas.The experimental results show that during the deep drawing forming of polypropylene material,the flange area does not participalte in the deformation,the bottom area and the wall area participate in the deformation,the wall wall area is deformed more than the bottom area,and the material thickness changes to a large extent.