PTFE coated fiberglass cloth/fabric 1: have good machenical property ... liquid corrosion;4). Low ratio of friction (0.05-0.1), it is the best choice of non ... small permittivity: 2.6, the tangent is lower than 0.0025), ultraviolet resistance, static proofing;7). Good dimension ... of electric, septa, cushion, gasket. High frequency plank coated with copper;4. heat resisting envelope, terrace base-material, ...