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The weekly average of each days calculated 7-day rolling average for the share of all detected VOC-N501Y cases (which is a good proxy for Alpha in Liechtenstein), was found to be 10.9% in week 5, followed by a dominant 52.2% in week 9 (where 8 out of 15 tests were found to be Alpha); and grew further to 73.4% in week 10 (where 6 out of 9 tests ...
PVC is chosen because of its good electrical insulation, ease of extrusion, and resistance to burn. [ 40 ] In a fire, PVC can form hydrogen chloride fumes; the chlorine serves to scavenge free radicals , making PVC-coated wires fire retardant .