In the preferred embodiment, the layers 116 are composed of polypropylene having a thickness of approximately 20.0 microns, with {HEAD ~ a thickness variation} of {TAIL ~ 0.3 microns} 
of
In the preferred embodiment , the layers 116 are composed of polypropylene having a thickness of approximately 20.0 microns , with { HEAD ~ a thickness variation } of { TAIL ~ 0.3 microns }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL