XD-80 strap machine is a double-screw extrusion machine,daimeter of the screw is 85mm,65mm, is commonly referred to as big extrusion machinesmall extrusion machine which XD-73 don’t possess,when it operates,the low-price poor-quality mixture is added to BEM,and good-quality mixture is added into SEM,,after the extruding,producing the straps,poor-quality material is inside,and good-quality material is outside,then highly improving the quality and?? appearance of the straps.at the same time bringing dowm the cost,which is so as to be called “sandwich” strap producing,also equips SD-A’s function,equips hand-controlled temperature ,but cannot produce machine-used straps.