PEI board such non-crystalline thermoplastic plastic in contact with a polar organic solvent (such as ethanol), are very sensitive to stress embrittlement. Work environment stress-free parts completely harmless, but parts of stress can cause brittle fracture stress. Not only the applied load stress, internal stress generated in the machining process and profiles production process will produce a significant role stress rattle. Some type of heat treatment machine parts will minimize the risk of brittle fracture stress stress release. Plus these amorphous thermoplastic shall not use oil-based coolant, because they seem to increase environmental stress brittle fracture. For these materials, the coolant is preferably pure water or compressed air. PEI board applications, polyetherimide (PEI) has an excellent balance of performance, effectively used in electronics, electrical and aerospace and other industrial sectors, and can be used as a traditional and cultural life of the supplies of the metal materials substitution. 2, in the electrical, electronic industrial sectors, polyetherimide (PEI) material manufactured components obtained a wide range of applications, including high strength and dimensional stability of the connections, general and micro-relay housings, circuit boards, coils, soft sexual circuit, mirrors, high-precision optical components. Particularly striking, use it to replace the metal fiber optic connectors, allows the device structure optimization, to streamline its manufacturing and assembly steps, to maintain a more accurate size, in order to ensure the final product cost reduction of about 40%. 3, the impact resistance plate Ultem1613 for the various parts of the aircraft, such as portholes, machine head member, the seat member back, wall panels, doors covering layer as well as a variety of objects for the use of passengers. Polyether imide (PEI), and carbon fiber composite materials have been used for various structural parts of the latest helicopter. 4, the use of its excellent mechanical properties, heat resistance and chemical resistance characteristics, PEI is used in the automotive sector, such as for the manufacture of high temperature connectors, high power lamps and lights, control compartment of the vehicle external temperature sensor (air conditioning temperature sensors) and control of the air and fuel mixture temperature sensor (effective combustion temperature sensor). In addition, PEI can also be used as a high temperature lubricant pump impeller erosion, operating at 180 ℃ distillation of ground glass joints (Order of the interface), lighting, anti-fog mirrors. 5, polyetherimide foam insulation and sound-proofing material used as the transport machinery aircraft. 6, PEI hydrolysis resistance, and therefore used as a medical surgical instrument handles, trays, clamps, artificial limbs, medical lamps mirrors and dental appliances. 7, in the food industry, as product packaging and microwave trays. 8, PEI of both the excellent high temperature mechanical properties and wear resistance, it can be used to make pipes steering valve valves. Due to its high strength, flexibility and heat resistance, PEI is an excellent coating and film-forming material capable of forming coatings and films for the electronics industry, can be used for the manufacture of aperture of 0.1, having a high permeability the microporous membrane. Can also be used as high temperature adhesives and high-strength fibers. Advantage of PEI board has an excellent balance of performance, effectively used in electronics, automotive, motor and aviation workers to departments, and used as traditional products and cultural life of the supplies of the metal materials substitution. Generally used in micro-tools / public catering, analytical instruments, medical equipment, telecommunications, molded interconnect device (MTD), automotive lighting, aircraft interior parts, HVAC / fluid handling. PEI excellent resistance to hydrolysis, therefore used as a medical surgical instrument handles, trays, fixtures, prostheses, medical lamps mirrors and dental appliances. Dimensions: plate: thickness x width x length = (10-80) x620x1000mm rods: (5-150) x1000mm grades: ︴ Color: brown the semipermeable amber Origin: United States GE / Germany