{HEAD ~ The sheet} may include {TAIL ~ a chemically resistant additive} to provide chemical resistance to at least part of the protective membrane 
{ HEAD ~ The sheet } may include { TAIL ~ a chemically resistant additive } to provide chemical resistance to at least part of the protective membrane
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH