METHOD TO DECREASE THE ACETALDEHYDE AND FORMALDEHYDE CONTENT IN THE CELLULOSIC FIBER-REINFORCED POLYPROPYLENE COMPOSITES THERMOPLASTICS
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United States of America Patent
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Jan 5, 2017
app pub date -
Jun 29, 2016
filing date -
Jul 2, 2015
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Abstract
A method of reducing aldehyde emissions during injection molding of a part with a cellulosic fiber-reinforced polypropylene composition. An injection molding machine capable of the parameters necessary for injection molding of a cellulosic fiber-reinforced polypropylene composition is provided. Said injection molding machine including: a hopper for holding of a pelletized cellulosic fiber-reinforced polypropylene composition material; a feed throat portion; and, a mixing chamber installed in line with the injection molding machine between the hopper and the feed throat portion. Metering an effective amount of an aldehyde reducing composition into the mixing chamber containing pelletized cellulosic fiber-reinforced polypropylene composition and mixing the pelletized cellulosic fiber-reinforced polypropylene composition with the aldehyde reducing composition for wetting the surface of the pellets with the aldehyde reducing composition. A part is then injection molded with the wetted pelletized mixture.
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