compressing the fibrous material to a mat fleece {HEAD ~ whose entire surface} is connected to {TAIL ~ the foamable adhesive} to form a composite mat 
is connected to
compressing the fibrous material to a mat fleece { HEAD ~ whose entire surface } is connected to { TAIL ~ the foamable adhesive } to form a composite mat
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH