Method for using water insoluble chemical additives with pulp and products made by said method
First Claim
1. A method for preparing chemically treated pulp fiber comprising:
- a) creating a fiber slurry comprising process water and pulp fibers;
b) transporting said fiber slurry to a web-forming apparatus of a pulp sheet machine and forming a wet fibrous web;
c) drying said wet fibrous web to a predetermined consistency thereby forming a dried fibrous web;
d) treating said dried fibrous web with an applied amount of a chemical additive thereby forming a chemically treated dried fibrous web containing chemically treated pulp fibers; and
(e) dispersing the chemically treated pulp fibers of the chemically treated dried fibrous web in water and draining the water from the chemically treated pulp fibers, wherein said chemically treated pulp fibers retain from between about 10 to about 100 percent of the applied amount of said chemical additive.
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Abstract
Pulp fibers can be treated with water insoluble chemical additives resulting in a minimal amount of unretained water insoluble chemical additives present after redispersing the treated pulp fibers in the process water. One embodiment of the present invention is a method for preparing chemically treated pulp fiber. A fiber slurry is created comprising process water and pulp fibers. The fiber slurry is transported to a web-forming apparatus of a pulp sheet machine thereby forming a wet fibrous web. The wet fibrous web is dried to a predetermined consistency thereby forming a dried fibrous web. The dried fibrous web is treated with a water insoluble chemical additive thereby forming a chemically treated dried fibrous web containing chemically treated pulp fibers. The chemically treated pulp fibers have an improved level of chemical retention of the water insoluble chemical additive and retain from between about 25 to about 100 percent of the applied amount of the water insoluble chemical additive when the chemically treated pulp fibers are redispersed in water.
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Citations
33 Claims
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1. A method for preparing chemically treated pulp fiber comprising:
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a) creating a fiber slurry comprising process water and pulp fibers; b) transporting said fiber slurry to a web-forming apparatus of a pulp sheet machine and forming a wet fibrous web; c) drying said wet fibrous web to a predetermined consistency thereby forming a dried fibrous web; d) treating said dried fibrous web with an applied amount of a chemical additive thereby forming a chemically treated dried fibrous web containing chemically treated pulp fibers; and (e) dispersing the chemically treated pulp fibers of the chemically treated dried fibrous web in water and draining the water from the chemically treated pulp fibers, wherein said chemically treated pulp fibers retain from between about 10 to about 100 percent of the applied amount of said chemical additive. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for applying a chemical additive to pulp fiber, said method comprising:
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a) mixing pulp fibers with process water to form a fiber slurry; b) transporting said fiber slurry to a web-forming apparatus of a pulp sheet machine and forming a wet fibrous web; c) dewatering said wet fibrous web to a predetermined consistency thereby forming a dewatered fibrous web; d) applying an amount of a chemical additive to said dewatered fibrous web thereby forming a chemically treated dewatered fibrous web of chemically treated pulp fibers; and (e) dispersing the chemically treated pulp fibers of the chemically treated dewatered fibrous web in water and draining the water from the chemically treated pulp fibers, wherein said chemically treated pulp fibers retain from between about 10 to about 100 percent of the applied amount of said chemical additive. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification