1. Ultem is a polyetherimide plastic produced by American General Company. 2. Polyetherimide has the best high temperature resistance and dimensional stability, as well as chemical resistance, flame retardancy, electrical properties, high strength, high rigidity, etc. 3. PEI resin can be widely used in high temperature resistant terminals, IC bases, lighting equipment, FPCB (flexible circuit boards), liquid delivery equipment, aircraft internal parts, medical equipment and household appliances, etc.
Characteristics of polyetherimide:
1. Polyetherimide is characterized by high strength, high rigidity, wear resistance and dimensional stability at high temperatures. .
2. Polyetherimide is an amber transparent solid. It has inherent flame retardancy and low smoke without adding any additives. Its oxidation index is 47% and its combustion rating is UL94-V-0. class.
3. The density of polyetherimide is 1.28~1.42g/cm3, the glass transition temperature is 215℃, the heat distortion temperature is 198~208℃, and it can be used for a long time at 160~180℃. It is allowed The maximum intermittent use temperature is 200℃.
4. Polyetherimide has excellent mechanical strength, electrical insulation properties, radiation resistance, high and low temperature resistance, fatigue resistance and molding processing properties; it can be achieved by adding glass fiber, carbon fiber or other fillers Enhance the purpose of modification.
Polyetherimide Properties:
Polyetherimide has a wide range of chemical resistance, including resistance to most hydrocarbons, alcohols, and all halogenated solvents; also Resistant to inorganic acids and short-term resistance to weak alkali. For partially halogenated solvents, polyetherimide is a good choice. Its hydrolytic stability is very good, and its tensile strength remains at more than 85% after being soaked in boiling water for 10,000 hours. At a temperature of 270F, the tensile strength remains at 100% after 2,000 steam hot pressing cycles. Polyetherimide has good resistance to ultraviolet rays and Y-rays. It is processed under 400 megarads of cobalt ray radiation and maintains a tensile strength of 94%.