polymer electret

例句：

1. 1.The polymer electrostatic fiber is used in electronic devices to improve signal transmission efficiency.
   聚合物电纺丝用于电子器件中，以提高信号传输效率。
2. 2. The polymer electrostatic fiber has excellent mechanical properties and can be used as a reinforcement material in composite materials.
   聚合物电纺丝具有优异的机械性能，可以作为复合材料的增强材料使用。
3. 3.The polymer electrostatic fiber is also widely used in medical fields, such as drug delivery systems and tissue engineering.
   聚合物电纺丝在医学领域也有广泛应用，如药物递送系统和组织工程。