Patent ID: 8795469
Filing Date: 2014-08-05
Classification: D21C,D21H

Abstract:
1. A method of preparing photocopy paper from a whole straw nonwood fiber source comprising: chopping a quantity of a dry whole straw nonwood fiber source to an average length between 1-100 mm, wherein the whole straw nonwood fiber is a mixture of 60-90% wheat and 10-40% flax; wet processing the chopped whole straw material to remove dirt, fines and water-soluble extractives; dewatering the chopped whole straw material; pre-heating a cooking liquor comprising 5-50% NaOH (w/w) and 0-10% anthraquinone (w/w) to a temperature between 60-100° C.; heating the chopped whole straw material in the cooking liquor for 10-240 minutes to a temperature between 100-240° C.; washing the heated chopped material; bleaching the washed material; deflaking the bleached material; and forming the deflaked, bleached material into photocopy paper sheets.