MULTIPLY CONTAINERBOARD FOR USE IN CORRUGATED BOARD
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United States of America Patent
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Issued Date -
Jul 18, 2024
app pub date -
May 13, 2022
filing date -
May 17, 2021
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Abstract
The present invention relates to a multiply containerboard for use in corrugated board, said multiply containerboard comprising: a first outer ply, a second outer ply, and at least one intermediate ply sandwiched between the first and second outer ply, wherein said first and second outer ply comprise at least 70 wt % neutral sulfite semi chemical (NSSC) pulp based on dry weight, and wherein said intermediate ply comprises at least 30 wt % unbleached kraft pulp based on dry weight and at least one cellulose based strength enhancement agent, and wherein said intermediate ply comprises less than 30 wt % NSSC pulp based on dry weight.
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