DISINTEGRATABLE BROWN SACK PAPER
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Abstract
The present invention includes a method of manufacturing a sack paper having a Gurley porosity (ISO 5636-5) of less than 25 s, comprising the steps of: a) mixing an unbleached pulp with a bleached pulp to obtain a pulp mixture in such proportions that the dry weight ratio of unbleached pulp to bleached pulp in the pulp mixture is between 7:1 and 1:1; and b) forming the sack paper from said pulp mixture, wherein starch is added in an amount of 1-7 kg/ton paper.
1 Citation
41 Claims
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1-15. -15. (canceled)
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16. A method of manufacturing a sack paper having a Gurley porosity (ISO 5636-5) of less than 25 s, comprising the steps of:
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a) providing a pulp having a Kappa number (SCAN-C 1;
00) of 15-40;b) subjecting the pulp to high consistency (HC) refining and optionally low consistency (LC) refining to obtain refined pulp, wherein the energy supply of the LC refining is less than 120 kWh/ton paper; and c) forming the sack paper from said pulp mixture, wherein the amount of starch added in the method is 1-7 kg/ton paper and the amount of hydrophobic size added in the method is less than 2 kg/ton. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification