塑料薄膜（袋）作为现代包装主要品种之一，近年来仍然持续快速发展，而且其速度是不受人们意志阻挠的。在包装材料发展中，随着现代化包装技术和设备的发展，要求有适应高速化、自动化包装的高强度包装材料与之配合。为了提高包装质量，延长包装产品的寿命，要求提供具有良好 As one of the main varieties of modern packaging, plastic film (bags) has continued to develop rapidly in recent years, and its speed is not obstructed by people’s will. In the development of packaging materials, along with the development of modern packaging technologies and equipment, high-strength packaging materials that meet the need for high-speed, automated packaging are required to cooperate with them. In order to improve the quality of packaging and extend the life of packaging products, it is required to provide good