Related Legal Terms & Definitions. 1  COMPETENT WITNESS One who is legally qualified to be heard to testify in a cause. 2  RESPECTABLE WITNESS One who is competent to testify in a court of justice. 3  CREDIBLE WITNESS A credible witness is one who is competent to give evidence, and is worthy ofâ¦.
In general, combustibility of polymers depends on their chemical structures. Polymers with more carbon atoms in their macromolecular structure (e.g., PE, PP, PS, PMMA) are more combustible than polymers containing halogen atoms (e.g., PVC, PVDC, PTFE).
By adding special conductive materials to the resin, the conductivity of PVDF is increased to control static electricity formation or conduction. These additives may be in the form of either carbon fibers (PVDF CN-F) or carbon powder (PVDF CN-P).Some properties of the original PVDF material are modified by the addition of fillers, but chemical resistance, strength, and manufacturability remain generally the same.ynarÂ® PVDF has excellent corrosion and chemical resistance and performs in many applications up to 300Â°F (149Â°C). It is used extensively in chemical processing applications because of its unique combination of properties.