The second polymer contains a co polymer having at least 50% α olefin units and is characterized by a number average molecular weight of about 7,000 g/mol to 50,000 g/mol, a viscosity of between about 2,500 and 150,000 {HEAD ~ cP} measured at {TAIL ~ 170° C.}, and a melting temperature lower than the melting temperature of the exterior surface portion of the core 
measured at
The second polymer contains a co polymer having at least 50 % α olefin units and is characterized by a number average molecular weight of about 7,000 g / mol to 50,000 g / mol , a viscosity of between about 2,500 and 150,000 { HEAD ~ cP } measured at { TAIL ~ 170 ° C. } , and a melting temperature lower than the melting temperature of the exterior surface portion of the core
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