Inventors:
David A. Bilski - Goodland IN, US
International Classification:
C08K 5/00
Abstract:
A biodegradable plastic used for disposable packaging and other product which will degrade when disposed of in a land fill. The biodegradation begins in about 10 years after disposal. The shelf life of the disposable products is about 90 to 120 days before the infused mineral oil will begin to weep out of the plastic. The shelf life will be decreased if the plastic is stored at above 50 degrees Centigrade. The biodegradable plastic is made from a mixture of about 11. 5% by weight of medical grade mineral oil to polypropylene. A mixing device having a feed chamber with polypropylene and mineral oil added to the feed chamber at a rate coordinated with the movement of the mixing and infusion screw delivers infused mineral oil in the polypropylene at a desired mixture ratio to a mold.
