Polyimide film is one of the first commodity polyimide, for motor slot insulation and cable wrapping material. The main products are DuPont Kapton, Ube of Upilex series and Kaneka Apical. Transparent polyimide film solar cells can be used as a soft bottom plate. IKAROS's sail is manufactured using polyimide film and fiber as in the thermal power sector, polyimide fibers can be used to filter hot gases, polyimide yarns may be separated from the dust and gas in particular Chemical material.
Paint: as an insulating paint for magnet wire, or as a high-temperature coatings.
Advanced composite materials: for the aerospace, aircraft and rocket parts. It is one of the most high-temperature structural materials. E.g., U.S. supersonic aircraft speed plan is designed 2.4M, flight surface temperature of 177 ℃, requires the service life of 60000h, is reported to have been determined as 50% of the structural material to a thermoplastic polyimide matrix resin Carbon fiber reinforced composite material, the amount of each aircraft is about 30t.
Fiber: elastic modulus after the carbon fiber as the medium and high-temperature filter material and radioactive substances bulletproof, fireproof fabric. Changchun, China has the production of polyimide products.
Foam: as high temperature insulation material.
Engineering Plastics: thermosetting also thermoplastic, thermoplastic molding can also be used for injection molding or transfer molding. The main lubrication, sealing, insulation and construction materials for the self. Wide polyimide materials have begun to use the rotary vane compressor, piston rings and special pump seals and other mechanical parts.
Membranes: for a variety of gases, such as the separation of hydrogen / nitrogen, nitrogen / oxygen, carbon dioxide / nitrogen or methane, etc., to remove moisture from the air the hydrocarbon feed gas and alcohols. But also as a pervaporation membrane ultrafiltration. Since the polyimide heat resistance and organic solvent properties, has a special significance in the separation of organic gases and liquids.
Electronic components and semiconductor industries
Resist: Certain polyimide may also be used as a photoresist. There are negative and positive rubber glue, with sub-micron resolution. And pigments or dyes can be used with a color filter film, which can greatly simplify processing operations.
Application of microelectronic devices: Used as an interlayer dielectric layer insulation, as a buffer layer can reduce stress and improve yield. As the protective layer can reduce the impact of the environment on the device, it can also a- particles from the shielding effect, reducing or eliminating soft error (soft error) devices. The semiconductor industry as a high-temperature polyimide adhesive, in the production of semiconductor materials and digitizing systems MEMS chip, since the polyimide layer having good mechanical ductility and tensile strength, helps to improve the polyimide layer and an adhesive polyimide layer and a metal layer is deposited between. High temperatures and chemical stability of the polyimide layer and the metal plays a variety of external environment isolation.
LCD -oriented agent used: polyimide in TN-LCD, SHN-LCD, TFT-CD and future aspects of the ferroelectric liquid crystal display alignment agent material occupies a very important position.
- The light material: as passive or active waveguide material optical switch materials, fluorine-containing polyimide in the communication wavelength range of transparent polyimide as a stable chromophore matrix material can be improved sex.
Humidity: The use of hygroscopic linear expansion of its principle can be used to make a humidity sensor.