| http://www.w3.org/ns/prov#value | - Thus, inert fillers and/or antioxidants, etc. may be employed to provide thermalstability.Among the known inert fillers employed in PTC polymeric compositions are polymeric powders such as polytetrafluoroethylene (e.g., Teflon.TM. powder), polyethylene and other plastic powders, fumed silica, calcium carbonate, magnesium carbonate,aluminum hydroxide, kaolin, talc, chopped glass or continuous glass
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