Meanwhile, for the chemical resistance, PEEK natural has the greatest chemical resistance among the PEEK family, only 98% concentrated sulfuric acid could dissolve PEEK natural and the plastic also shows different levels of resistance to different chemicals. PEEK Virgin mechanical properties (source: Ensinger) So if you use PEEK natural under the frictional working condition, please beware of the material loss due to abrasion. Relatively low modulus means PEEK natural is ‘softer’ and does not wear resistance compared to other PEEK modified materials. Although the PEEK natural has high toughness, the modulus of elasticity of the material is only 4200mpa which is the lowest of the plastic family. We can see the elongation at break is 15% and impact strength (Charpy) is n.b. Besides the great properties mentioned before, PEEK natural shows the highest toughness of the PEEK family. PEEK natural or the virgin form of PEEK is the most widely used PEEK plastic.
The most common PEEK plastics are PEEK natural, glass, or carbon fiber modified and the PEEK PVX. What should be mainly emphasized is that the long-term service temperature is up to 260℃(500℉).
PEEK PLASTIC SERIES
This type of plastic exhibits a series of great properties, such as excellent chemical resistance, great mechanical strength, good dimensional stability, and so on. Polyether-ether-ketone, which is known as PEEK, is a high-performance, semi-crystalline plastic.
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