A METHOD FOR MANUFACTURING A PURIFIED FIBER FRACTION FROM USED BEVERAGE CARTON
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United States of America
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Jan 9, 2025
app pub date -
Oct 25, 2022
filing date -
Oct 25, 2022
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Abstract
The present invention relates to a method for manufacturing a purified fiber fraction from used beverage carton (UBC), said method comprising the steps: a) subjecting UBC starting material to a polymer and aluminum film separation method to obtain a UBC polymer and aluminum fraction and a raw UBC fiber fraction; b) optionally subjecting the raw UBC fiber fraction to a coarse screening method to remove coarse particles; c) subjecting the raw UBC fiber fraction to a fine screening method to remove cellulose fines and fine particulate contaminants, wherein the fine screening method comprises at least one fine screening step and at least one washing step; d) optionally subjecting the fine screened UBC fiber fraction to a washing method to remove further contaminants; e) optionally subjecting the fine screened UBC fiber fraction to a bleaching method; f) subjecting the fine screened, and optionally bleached, UBC fiber fraction to a dewatering method to a consistency of at least wt %; and g) subjecting the dewatered UBC fiber fraction to deactivation to obtain a purified 20 UBC fiber fraction.
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