MANUFACTORING OF PAEK PRODUCTS
The PAEK materials are required especially in the food, oil & gas, aerospace and medical industry for the manufacture of valve seats, insert rings, sliding bushings, anti-extrusion rings, gaskets, Chevron packings, spacers, implants and items suitable for contact with food and drinks.
The PAEK (and in particular PEEK) are special materials with good characteristics of rigidity, strength, wear and chemical resistance and dimensional stability over a very wide temperature range. They can be loaded with glass fibers, carbon and PTFE.
The polyaryletherketones (PAEK) are polymers in which chain are present, ether groups (oxygen bridges) and ketone groups (C = O); the PAEK are partially crystalline polymers, whose melting temperature depends on the percentage of ketone groups. The definition of the various types of PAEK is made according to the quantity and arrangement of the various groups: in addition to PEEK (polyetheretherketone), of the PAEK family includes among others the Polyetheretherketone (PEK), the polieterchetonechetone (PEKK) and the polieterchetoneeterchetonechetone (PEKEKK).
CHARACTERISTICS AND APPLICATION FIELDS
The PAEK can be machined with conventional methods of molding and extrusion, in addition to being mechanically worked by chip removal.
The PAEK have excellent stiffness and strength in a very wide temperature range (continued operation temperatures are around 250 ° C). They have high fatigue resistance and a good resilience. They also have good sliding properties, high thermal stability and good dimensional stability. The PAEK are resistant to non-oxidizing acids, alkaline solutions, oils, greases and brake fluids as regards the sector of the vehicles. The only known solvent at room temperature is sulfuric acid. Have poor UV resistance and, compared to other thermoplastic materials, they have a reduced smoke seal capacity. To increase stiffness and strength may be added to glass and carbon fibers.
Thanks to its excellent fire and its thermal and chemical resistance PEEK is increasingly required to ensure optimum performance in areas such as automotive, aerospace, electronics, food, nuclear, medicine and pharmaceutics . PEEK are manufactured bearings, seals, gaskets, bushings, valve seats, seats, rotors, implants, endoscopes, parts in contact with food and water, semiconductor, mounted in particular pipelines and oil platforms, guides, coatings of tanks, parts of packaging systems, gears and slide components. The PEKEKK is recommended for the realization of parts subject to high loads to very high temperatures.
Shown below are the most common PAEK trade names available at LIMA.
|LM464||PEEK + CARBONIO + GRAFITE + PTFE|
|LM467||PEEK + 20% PTFE|
|LM468||PEEK + 30% FIBRA DI VETRO|
PAEK – TRADE NAMES
Shown below are the most common trade names for the PAEK material.
Please remember that LIMA can provide both generic materials and materials covered by trademark (ie that show the TM or ® endorsements), based on the requirements of the customer. If the customer wishes to details made of plastic material covered by trademark, LIMA will stock up directly by the holding company of the said trademark.