Patent ID: 6211501
Filing Date: 2001-04-03
Classification: B65D,C08K,C08L

Abstract:
A method of preparing a microwaveable, mineral-filled polypropylene food container comprising:(a) preparing a melt-compounded composition comprising from about 40 to about 90 percent by weight of a propylene polymer, from about 10 to about 50 percent by weight of a primary mineral filler and an effective odor-reducing amount of a basic organic or basic inorganic compound, said melt-compounded composition exhibiting an odor index of less than 0.75;(b) extruding said melt-compounded composition into sheet form; and(c) forming said food container from said sheet wherein said basic organic or inorganic compound is operative to reduce undesirable odors in said melt-compounded composition to the aforesaid odor index value of 0.75 or less, and wherein said melt-compounded composition is produced at a process melt temperature of less than about 425.degree. F.