Patent ID: 6420689
Filing Date: 2002-07-16
Classification: B65D,C08K,C08L,Y10T

Abstract:
A crack-resistant, thermoformed food container having a wall thickness from about 10 to about 80 mils consisting essentially of from about 40 to about 90 percent by weight of a polypropylene polymer, from about 10 to about 50 percent by weight mica, from about 1 to about 15 percent by weight polyethylene, from about 0.1 to about 5 weight percent titanium dioxide and further including a basic organic or basic inorganic compound comprising the reaction product of an alkali metal or alkaline earth element with carbonates, phosphates, carboxylic acids as well as alkali metal and alkaline earth element oxides, hydroxides, or silicates and basic metal oxides, including mixtures of silicone dioxide with one or more of the following oxides: magnesium oxide, calcium oxide, barium oxide, and mixtures thereof.