Patent ID: 7846284

Claim:
A process for recycling scrap of shoe stiffener consisting of a core layer with thermoplastic polyurethane and filler resin materials, an upper and a lower reinforcing net fabric layer having long filaments contained therein and disposed on opposite sides of said core layer, said process comprising the steps of: (1) Kneading scrap of shoe stiffener, as collected, by a kneader at a temperature of 60° C.˜150° C. and compressing, under cooling, the scrap to be a plurality of dense clumps; (2) Freezing the dense clumps at a low temperature ranging 0° C.˜−20° C. to be frozen clumps which are hard and brittle at the low temperature; (3) Crushing the frozen clumps to be a crushed product including pellets of resin materials and short fibers as being cut from the long filaments contained in the upper and low net fabric layers; and (4) Extruding the crushed product through a T-die of an extender to form a regenerated core layer, and laminating two reinforcing net fabric layers on opposite sides of the regenerated core layer to produce a regenerated shoe stiffener sheet having the core layer sandwiched in between the upper and lower reinforcing net fabric layers.