Abstract:
Polypropylene heterophasic copolymers are produced having increased impact strength through the use of controlled rheology techniques by the addition of a peroxide at conditions which increase the deactivation or half life of the peroxide. The increased half life slows down the vis-breaking process and allows better dispersion of rubber particles within the polymer. In this way, copolymers having a high melt flow can be prepared while obtaining high impact strength and lower stiffness values, without the need for additional elastomeric modifiers.
Abstract:
A method and apparatus for producing increased protein chicken meal. Scrap chicken parts are loaded into a cooking vat that is 40 feet long by 5 feet wide by 4 feet deep, with a system of moving chain conveyors and paddles. These conveyors move the scrap chicken parts at a predetermined speed through oil maintained at a temperature of approximately 360.degree. to 380.degree. F. for the entire length of the vessel, and dump the scrap chicken parts at the opposite end of entry. Oil is circulated through the vat at a rate of approximately 680 to 860 gallons per minute (gpm) to allow for the rapid removal of fat and moisture from skin and meat in a continuous process. The scrap chicken parts are removed from the vat and pressed to form poultry oil. Subsequently, the scrap chicken parts are broken up to form a high protein chicken meal.