Plastic stonewashing stone and method

Details Plastic stonewashing stone and method Plastic stonewashing stone and method

1993-02-09

1996-05-07

Jones, Deborah

Abrasive tool making process, material, or composition

Pore forming

51307, 264 41, 264 54, 264211, 521154, 521159, B24D 300

Patent

active

055141927

ABSTRACT:
A porous and abrasive plastic stone is disclosed for use in a stonewashing process to commercially age garments or fabric. The plastic stone replaces the pumice stone that is typically used in the stonewashing process. A method for manufacturing the stone includes mixing plastic material with a gas-producing agent within a plastic extruder. This produces a plurality of cells or voids in the plastic as gas expands during the cooling of the plastic. The cells along the periphery of the plastic material are ruptured by the gas to form an abrasive surface comparable to that of pumice and yield a plastic stone with a desired density.

REFERENCES:
patent: 4436679 (1984-03-01), Winstead
patent: 4904280 (1990-02-01), Cygan et al.
patent: 4954138 (1990-09-01), Butcher et al.
patent: 5266087 (1993-11-01), Oat

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