Method for processing grass for manufacturing paper, paperboard and cardboard
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United States of America Patent
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Feb 5, 2019
Grant Date -
Jan 26, 2017
app pub date -
Dec 17, 2014
filing date -
Dec 18, 2013
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Abstract
The present invention relates to a method for processing grass or hay as paper pulp having the steps of pre-reducing the grass or hay with a bale breaker and/or a shredder to an average fiber length between 500 mm and 10 mm, preferably between 120 mm and 10 mm, removing impurities and foreign or extraneous substances by means of a cyclone; reducing and fibrillating the grass or hay in a fiber mill, fraying the grass or hay; and screening and/or sifting the grass or hay by means of a circulating-air separator and/or a cyclone screener.
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