Hello,I am anna ,today i will introduce to you the difference between steel strapping tool and plastic strapping machine.

  With steel strapping tool, elongation is not a key characteristic. It is a consideration with plastic strap, as long as you
stay within its working range. A more important plastic strapping consideration is elongation recovery.
  Once tension has been applied and the strap has elongated, how hard will the strap try to return to its original length? With plastic, time changes the recovery. If you have a rigid load, polyester might be best.
  However, because it doesn’t elongate much, it doesn’t have room to recover. On a shrinking-type load, this can be a problem. Since both nylon and polypropylene elongate more than polyester, and have more room to recover, they would both be better choices. If a high level of retained tension is important, nylon would be the preferred choice and if retained tension is not important, polypropylene’s lower price may change the choices .see more at http://www.steelstrapping.com.cn