Thermoplastic plastics refer to plastics that can be repeatedly heated and softened and cooled and hardened within a specific temperature range, such as polyethylene, polytetrafluoroethylene, and the like. Thermoplastic plastics are classified into hydrocarbons, vinyls containing polar genes, engineering, and cellulose. Softens when heated, becomes hard when cooled, and can repeatedly soften and harden and maintain a certain shape. It is soluble in certain solvents and has soluble and soluble nature. Thermoplastics have excellent electrical insulation, especially PTFE, PS, PE, and PP all have very low dielectric constant and dielectric loss. For high frequency and high voltage insulation materials.