Poly-ether-ether-ketone (PEEK) is a thermoplastic special engineering plastic with excellent performance in abrasion resistance, temperature resistance, corrosion resistance, etc., which can meet various complex Material requirements of parts and components under working conditions and harsh environments. In recent years, with the introduction of domestic PEEK raw materials, the price of raw materials has been reduced, and they have been widely used in more and more industries.
1.
Mechanical property
The
tensile properties of PEEK materials are better than most thermoplastic
materials. With the rise of temperature, PEEK can still maintain very stable
tensile strength in a large temperature range. At high temperatures, PEEK
materials have good performance in bending strength, creep resistance, and
compressive strength. The impact resistance at room temperature is better than
polyimide PI, PPS, PAI and other materials.
2. Temperature resistance
PEEK has a glass transition temperature
of 143°C and a melting point of 343°C, but since PEEK is a semi-crystalline
material, PEEK can still maintain good mechanical properties in the range close
to the melting point temperature. The thermal deformation temperature of PEEK
is higher than that of PPS, and the continuous use temperature of PEEK is 250℃.
After 100,000 hours of continuous use at high temperatures, PEEK performance
can still maintain 50% of normal temperature.
The
natural color of PEEK is flame retardant, and it can reach UL94-V0 level
without adding any flame retardant. During high temperature decomposition,
carbon dioxide and carbon monoxide are mainly produced, and the content is very
small.
3. Electrical performance
PEEK
material has good electrical insulation. At 150 ℃ to room temperature, PEEK
volume resistivity is little affected by temperature. The surface resistivity
of PEEK is better than conventional thermoplastic materials such as PTFE, PET,
PI, etc. It is widely used in high-voltage electrical fields.
4. Wear resistance
PEEK is a
wear-resistant grade modified by graphite, PTFE, molybdenum disulfide, etc. It
has excellent wear resistance, even if the unmodified pure resin PEEK still has
good self-lubricity. Under the same conditions, the limit wear rate of PEEK is
higher than that of conventional friction materials such as POM, oil-bearing
bronze and hundred alloys.
PEEK has the corrosion
resistance second only to fluoroplastics. Except for some highly oxidizing
acids, PEEK can withstand most acids, alkalis, organic solvents, etc. (please
contact Ruilu for details).
6. Radiation resistance and hydrolysis
resistance
Most
plastics become brittle when subjected to electromagnetic or ionic radiation,
PEEK can still work normally under high dose of ionizing radiation, and can
still maintain good mechanical strength under high temperature steam
environment.
Main applications:
Because PEEK has good comprehensive
performance, it is widely used in aerospace, petrochemical, new energy, automotive,
electronic semiconductor, robot automation and other fields.