在案件现场上,常见到案犯通过破坏门和窗上的塑料窗纱进入现场作案。分析与识别塑料窗纱是被何种工具所破坏,对侦查案件,分析案情,寻找作案工具,提供证据有着重要的作用。塑料窗纱一般是用不同颜色直径为0.016～0.020mm单根或双根聚乙烯丝用机器编织而成,表面呈0.2mm×0.2mm左右网格状排列。现场上塑料窗纱被分离和破坏的方法 In the scene of the case, it is common to see the perpetrators committing the crime by breaking the plastic screens on the doors and windows. It is very important to analyze and identify what kind of tools the plastic screens are damaged. It has an important role in investigating cases, analyzing cases, finding tools for committing crimes and providing evidence. Plastic screens are generally different colors with a diameter of 0.016 ~ 0.020 mm single or double root polyethylene woven with a machine, the surface is about 0.2mm × 0.2mm grid-like arrangement. The method of separating and destroying plastic screens on site