Polyetherimide is a transparent amber amorphous thermoplastic special engineering plastic, English name: Polyetherimide, abbreviated as PEI. PEI (polyetherimide) does not add any additives. PEI raw material particles have inherent flame retardancy and low smoke, the oxygen index is 47%, the combustion level is UL94-V-0, and the density of PEI is 1.28-1.42g/cm3.
As a super special engineering plastic, the outstanding advantages of PEI are:
1 It has high and long-term heat resistance and good thermal stability. The glass transition temperature is 217℃, and the long-term use temperature can reach 180℃; it has excellent dimensional stability, and the linear thermal expansion coefficient is low and stable in a very wide temperature range, so the ambient temperature has little impact on the size. At higher temperatures and It does not deform when used under load, and the creep sensitivity is low.
2 It has excellent mechanical strength and modulus, outstanding electrical properties, can still remain basically constant in a wide temperature (-40℃-180℃) and frequency range, and has a stable dielectric constant and dissipation factor.
3 It has good infrared light transmission and high refractive index.
4 Without adding any additives, PEI has outstanding intrinsic flame retardant, low smoke density and low heat release performance.
5 It has excellent radiation resistance and chemical resistance, as well as unique electroplating ability.
6 In terms of processing performance, PEI has low melt viscosity and high fluidity, and can be molded with traditional thermoplastic melting processing technology and equipment, etc.
PEI is an excellent coating and film-forming material, which can form coatings and films suitable for the electronics industry, and can be used to manufacture microporous diaphragms with a pore size of <0.1μm and high permeability. It can also be used as high-temperature adhesives and high-strength fibers, etc.
Because PEI has excellent comprehensive balance performance, the specific application scenarios of PEI film mainly include the following high-end fields: 1 Vibrating membrane materials on electroacoustic devices. 2 Temperature-resistant insulation materials and membrane switches for industrial use (such as motors). 33D printed base plate material. 4 Bio-mixed application film in medical care. 5 Film materials of professional temperature-resistant film capacitors. 6 High-temperature vacuum packaging film. 7 Solder-blocking tape.
Foshan Dafu New Material Co., Ltd. is the first high-tech production enterprise in China to realize the lightweight and miniaturized application of PEI. Foshan Dafu has successfully developed the PEI film, which is another high-performance special engineering plastic film grandly launched after PEEK film and PA12 film. Its thickness Surrounded in the range of 6-500um, the film width is less than 1050mm. It is to fully demonstrate the above-mentioned inherent advantages and characteristics of PEI resin on a thin PEI film, fully broaden the application scenarios of PEI, provide extraordinary flexibility and freedom for design engineers to innovate, and also provide China's own solutions for China's high-end manufacturing.