For example, the cap 1 may be formed by molding {HEAD ~ a homopolymer polypropylene} with {TAIL ~ a modulus} of elasticity of 1450 MPa  
with
For example , the cap 1 may be formed by molding { HEAD ~ a homopolymer polypropylene } with { TAIL ~ a modulus } of elasticity of 1450 MPa
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 OTH OTH OTH OTH OTH OTH