Polyether ether ketone

Thermoplastics > Superpolymers

PEEK Polyether ether ether ketone
In Mexpolimeros we offer a wide range of polymeric and composite elastomeric materials developed according to their needs, ensuring quality products and service. Our product range includes degrees without reinforcement, glass fiber and / or mineral filler (Ibridos), loaded with metals, modified impact, with special additives as heat stabilizer , UV, metals, antistatic, antibacterial, laser marking , nucleated etc, and special flame retardant (with or without halogen) lubricant. E offer also developed and evaluated by highly qualified staff and advanced technology.
Polyetheretherketone
The PEEK polymers are linear aromatic, in which the presence of many aromatic components allows the material to have a high yield in the presence of aggressive environments and high temperature. The polyether ether ketone (PEEK) is a thermoplastic organic polymer (color version without load is light brown-gray.) Used in engineering applications, which provides a unique combination of high mechanical properties, temperature resistance and excellent chemical resistance. Among the polyketones polyetherketones (PEK), polieteretercetonacetona (PEEKK) encuntran. Both PEK as PEEKK have high melting temperatures above but other properties are similar.
Symbols							*XPEEK*
Polyetheretherketone Polyether ether ether ketone PEEK Poliéter éter cetona Poliéter éter éter cetona PEEK
PEEK Properties
Operating Temperature Max (260 ° C in continuous use For short periods of temperature 300 ° C High mechanical strength and creep High stiffness, even at elevated temperatures Excellent resistance to hydrolysis and chemical Excellent wear and friction behavior. low inherent flammability Very low smoke emission during combustion Very good dimensional stability Good dielectric properties and electrical insulation Excellent resistance to strong energy radiations V0 to 1.45 mm without ritadanti calls Unaffected by moisture
Products range
PEEK can be reinforced with glass fibers, which increase the stiffness of the material and / or carbon fibers, improving, inter alia, the already good self-lubricating properties of the base resin. They have also created versions with mixtures of glass fibers and mineral fillers to reduce the phenomenon of differentiated extractions. To reduce this phenomenon reinforced degrees, need careful design of manufactured items. They have created loaded with substances that enhance and create materials that can meet the specific requirements of wear resistance and friction coefficient versions. Applications that require X-ray shielding can benefit from the excellent thermal and chemical properties PEEK compounds.
PEEK Physical Mechanical Properties
Plastic materials with excellent rigidity and strength over a wide temperature range. As semicrystalline thermoplastic materials have a high fatigue resistance, impact resistance is good enough, which is maintained even at high temperatures. The processing conditions used to print the PEEK can affect crystallinity, and therefore the mechanical properties.
Thermal properties PEEK
Excellent stability of the physical and mechanical properties at elevated temperatures through a glass transition temperature of 217 & 176º C. With a melting point of 343 ° C, and a high Tg of the leak is very stable at various temperatures. Intrinsic flame resistance without additives in most products, exceptionally difficult to ignite with a limit oxygen index (LOI) of 47%, meeting the requirements of UL94 V0 in sections as thin as 0.41 mm. Extremely low smoke generation.
Electricals properties
Excellent properties of electrical and dielectric isolation, PEEK exhibits excellent electrical properties, low dissipation factor, high dielectric strength, which remain stable over a wide range of environmental conditions. This stability, combined with excellent thermal properties, make the PEEK candidates for demanding electronics applications.
Chemicals resitance
Unlike most amorphous thermoplastics, PEEK resins maintain a high strength and do not crack when exposed to liquids aircraft and automobiles, aliphatic hydrocarbons, alcohols, acids and aqueous solutions weak but has low medium resistance susceptibility and stress cracks. Good hydrolysis resistance, suitable for steam sterilization. The PEEK supports prolonged exposure to various cleaning agents and food groups without deterioration, cracking or losing their initial physical properties. Good resistance to high energy radiation (gamma and X-ray)
PEEK Processability
Artifacts PEEK can be processed using machines injection molding and conventional molds, except for their processing temperatures, which require heating the mold usually made by means of electrical resistors, extrusion blow and can be extruded, thermoformed and then can be processed with standard equipment for woodwork and metal without cracking, chipping, breakage of any kind.
Weld PEEK
It is desirable to dry the piece first. Once welded hot gas must anneal. Better welding hot elements, friction or ultrasound. It is highly solderable.
Engineering Notes PEEK
Fire resistance and high voltages of PEEK makes it ideal for clamps used to connect print to video screens used in aircraft, tanks and ships circuits.
PEEK polymerization
The PEEK are obtained by stepwise polymerization for the dialkylation of bisfenolati salts. The most common reaction is 4,4'-difluorobenzofenone with the disodium salt of hydroquinone, which is generated in situ by deprotonation with sodium carbonate. The reaction is carried out at about 300 ° C in polar aprotic solvents, such as dimethyl sulfoxide (DMSO) or dimethylformamide (DMF)
Applications PEEK
The PEEK represents an excellent compromise between chemical resistance, heat resistance and tribological performance. Their intrinsic characteristics make it an excellent product for the production of thermoplastic material where high performance is required even in extreme conditions of use. Natural Peek is suitable for the construction of parts that must withstand high temperatures as parts of industrial furnaces. By taking advantage of the good features of the fire and heat resistance and chemical to perform: in injection molded components for automotive, aerospace, electronics and medicine, cable insulation, films, fibers, ribbons and sheets made of PEEK fiber reinforced special .PEEK, Extra pure, suitable for the realization of the prosthesis, especially for short-term use in medical catheters and endoscopes sector PEEK. Prepreg reinforced PEEK carbon fiber, aramid, steel and glass compete with materials thermo fixed. It is used for medical equipment parts, washers, insulators, shoes and caps axis high speed, pump parts.