In {HEAD ~ the case} of {TAIL ~ matrices} composed of polyurethanes, preferred coatings include hydroxyl containing polyethylene copolymers such as ethylene vinyl alcohol copolymers 
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In { HEAD ~ the case } of { TAIL ~ matrices } composed of polyurethanes , preferred coatings include hydroxyl containing polyethylene copolymers such as ethylene vinyl alcohol copolymers
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH