January 01, 1970
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Mainly made of USA or Holland-imported polyaramide ( a chemical synthetic filament of the strength 10 times that of steel), used for braiding of seal packing.
Aramid fiber impregnated with PTFE, used for braiding of seal packing.
Made of polypropylene fiber by reinforcing, braiding and impregnating with PTFE. Phenolic fiber in corners give the packing much better wear resistance.
