通过正交试验研究片材的拉伸强度，并运用Matlab数学分析软件对试验数据进行了拟合优化，得到了钙塑双螺杆挤出机的螺杆转速、喂料速度与机筒温度对钙塑复合包装材料拉伸强度影响的三维曲面图及等值图，并建立了自变量与目标函数之间的数学模型。根据所得数学模型，利用LabVIEW编程设计出了GUI操作界面，实现了人机交互，能够科学准确地对产品质量进行预测，对生产实践具有一定的指导意义。

Tensile strength of sheet material was studied using orthogonal experiment. Test data obtained were fitted and optimized by using Matlab. The 3D map and contour map of the rotating speed, feeding speed and processing temperature on the tensile strength of sheet material was obtained. The mathematical models between independent and objective parameters were established. According to the mathematical models, graphical user interfaces were designed by using LabVIEW programming, through which human-computer interaction was realized and the product quality can be predicted scientifically and accurately. The purpose was to provide reference for production and practice.