Page 211 - b.safe catalog

Standard Plastics – Technical Plastics - High-performance Plastics
General Information
The permanent operating temperature is the most common characteristic to distinguish between standard plastics, technical plastics and high-performance plastics: for standard plastics, the limit is
90 to max. 100 °C, technical plastics can be operated within a range of 90 up to 140/150 °C. All high- performance plastics have a permanent operating temperature of more than 140/150 °C. The permanent operating temperature is defined as the maximum temperature with which the material can be operated for 20.000 hours but without loosing more than 50 % of its original rigidity and ductility. This means, a plastic material having a rigidity of 40 MPa in new condition has to show a rigidity of minimum 20 MPa after having been stored at its maximum permanent operating temperature for 20.000 hours.
Standard-Plastics
PP – Polypropylene
A polymer of ethylene with isostatic arrangement of methyl groups. It does not belong to the family of fluoroplastics. PP can be autoclaved (at +121 °C) and is distinguished by good mechanical and chemical properties almost up to its softening point. PP labware is unbreakable and an economical alternative with, however, restricted chemical and thermal resistance.
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PEEK – Polyetheretherketone
Partly crystalline thermoplastic that withstands high temperatures. Due to its unique properties, PEEK is mainly used for high-value and highly stressable components. The high upper working temperature (+250 °C), the good chemical stability and resistance to hydrolysis as well as the high mechanical values of this material will allow PEEK to become the material of the future. PEEK components are com- monly used as HPLC fittings, screw joints or as tubing. Its natural colour is brown, its price is considerably higher than that of PTFE
or PFA. PEEK is available in many different types, e. g. modified for self-lubricating bearings.
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Trade names
Norolen® by BASF Hostalen® by BASF
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Trade names
Victrex® by Victrex VESTAKEEP® PEEK by Evonik