In yet a further embodiment, {HEAD ~ the composite} has an initial tensile strength of at least 250 MPa and retains {TAIL ~ at least 75%} of the initial tensile strength for at least 8 weeks 
retains
In yet a further embodiment , { HEAD ~ the composite } has an initial tensile strength of at least 250 MPa and retains { TAIL ~ at least 75 % } of the initial tensile strength for at least 8 weeks
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH