MANUAL.LM20 Revision C January 2023 Page 42 of 52
PEEK:
Polyetheretherketone, one of the new high-strength engineering plastics. Has excellent chemical
resistance and structural properties. Very high temperature capability. Used for bearings, gaskets, and
back-up rings.
PTFE: (Trade name, Teflon)
Has broadest chemical resistance of all plastic materials and outstanding temperature capability. Limited
strength and poor shape retention make PTFE a poor choice for sealing and load bearing applications
unless combined with other fillers such as glass fibers, carbon graphite, or molybdenum disulfide.
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