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Frequently asked questions from the world of engineering plastics can be found here.
In general the semi-crystalline materials offer good wear resistance and are therefore suitable for moving parts such as wear strips, bushes etc. These include: - Standard / Engineering materialsPolyolefines. TECAFINE PP and PE HD and, in particular, UHMW PE offers excellent abrasion resistance particularly to slurry.PA (Nylon). TECAMID AND TECAST have good wear and abrasion resistance and also good impact resistance. It is necessary to allow for water absorption. MoS2 is used as an additive to improve the crystallinity which gives a harder surface and improved wear resistance. Most nylons will run dry but life is considerably improved by initial lubrication on assembly.POM (acetal). TECAFORM offers good wear, low water absorption and excellent fatigue resistance.
PET (Polyester). TECADUR has wear and abrasion resistance comparable to nylon. More dimensionally stable with negligible water absorption. Has good electrical insulating properties. High performance materialsIf high sliding speeds, surface pressure and temperatures occur singularly or together then high performance materials are necessaryTECATOR PPS PVX is an optimised bearing grade. Competitive transition to high temperature materials.TECAPEEK offers good all round properties. TEACPEEK PVX bearing grade has optimised tribological properties. Wear, friction, abrasion resistance. PAI (TECATOR) bearing grade. Good wear resistance. For low friction and high compressive strength.Vespel SP21 etc. A very high performance bearing material. Exceptional wear resistance and compressive strength.
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