Polymer bonding grains of sand to form useful objects

Details Polymer bonding grains of sand to form useful objects Polymer bonding grains of sand to form useful objects

1990-04-30

1991-03-05

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Utilizing diverse solid particles

264 37, 264115, B29C 4302

Patent

active

049976095

ABSTRACT:
A method of making useful objects by coating grains of sand with a thin film of sugar. Preparing a polymer mix of granulated plastic containers. Mixing the coated sand with the granulated plastic and placing the sand, resin mix in a mould and heating to 160.degree. C. to 300.degree. C. Applying sufficient pressure to force the air from the mould allowing the hot resin liquid to bond to the coated surface of the grains of sand. The mould and contents are cooled and the useful object removed.

REFERENCES:
patent: 3671615 (1972-06-01), Price
patent: 3804935 (1974-04-01), Potter et al.
patent: 3897527 (1975-07-01), Ringdal
patent: 3956541 (1976-05-01), Pringle
patent: 4115497 (1978-09-01), Halmo et al.
patent: 4225640 (1980-09-01), Erb
patent: 4279790 (1981-07-01), Nakajima
patent: 4681719 (1987-07-01), Vogel

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