Process for recycling scrap of shoe stiffener

Details Process for recycling scrap of shoe stiffener Process for recycling scrap of shoe stiffener

2008-12-15

2010-12-07

Crispino, Richard (Department: 1791)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S080000, C156S154000, C156S244110

Reexamination Certificate

active

07846284

ABSTRACT:
A process for recycling scrap of shoe stiffener comprising the steps of:1. Kneading the collected scrap of shoe stiffener, having a core layer of TPU resin material (with filler) sandwiched in between two opposite net fabric layers, to be dense clumps;2. Freezing the dense clumps to be hard frozen clumps;3. Crushing the hard frozen clumps to be a crushed product including pellets of resin material, and short fibers; and4. Extruding the crushed product including pellets and short fibers to produce a regenerated core layer; and covering or laminating two net fabric layers on opposite sides of the regenerated core layer to obtain a regenerated shoe stiffener sheet to enhance environmental protection and prevent from wasting of material resources.

REFERENCES:
patent: 5346934 (1994-09-01), Chriss
patent: 5478865 (1995-12-01), Chang
patent: 2002/0022428 (2002-02-01), Parker et al.

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