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