Bar, pipe, film, bearings, gaskets, valves, and other profiles and parts made of tetrafluoroethylene, widely used in mechanical, chemical, aerospace, electrical and electronic, defense industry, cutting-edge technology, healthcare and electrical insulation, and other fields . The reason difficult to stick PTFE flexible gasket good tetrafluoroethylene, there are several reasons: First, low surface energy tetrafluoroethane pad, the critical surface tension is generally only 31 to 34 dyne / cm. Due to the low surface energy, contact angle is large, the adhesive is not sufficiently wetted PTFE, and thus can not well adhere to the PTFE; second, the degree of crystallinity, good chemical stability, swelling and dissolution of better than a non-crystalline PTFE polymer difficulties in self-lubricating PTFE gasket, when the adhesive is applied to the surface of tetrafluoroethylene PTFE film tetrafluoroethane pipe tetrafluoroethane pad, difficult to place into a chain polymer molecular chain domain interdiffusion and tangles, can not form a strong adhesion; Third, PTFE structure is highly symmetrical, also belong to the non-polar polymers. The PTFE surface of the adhesive is adsorbed by van der Waals forces (intermolecular forces) caused by van der Waals forces comprising orienting force, induced force and dispersion forces. For non-polar polymer surface, do not have to form an alignment force and the force induced conditions, but can only form weak dispersion forces, and thus the poor adhesion properties. Good flexibility tetrafluoroethylene washers, Tianjin three (certified), PTFE pads provided by third Plastic Co., Ltd. Tianjin. Plastic Co., Ltd. Tianjin three (www.tjzsxszp.com) is Tianjin, plastic plate (sheet, section), bar leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. In Tianjin, the three leaders with the staff warmly welcome all inquiries negotiations to create Tianjin three a better future.