Paperboard containing recycled fibers and method of making the same
AssigneeSonoco Development, Inc.
InventorsZheming Xia, James Fogg, Mark Velicer, Matthew Meister
Life of this patent
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Abstract
A method of making a paper-based product includes substantially continuously treating a papermaking furnish including from greater than 0% to 100% recycled fibers with a biocide, and forming the furnish into the paper-based product. The furnish has a microorganism level of greater than 5,000 colony forming units per gram, and substantially continuously treating the furnish with the biocide reduces the microorganism level so that the paper-based product has a microorganism level of less than 5,000 colony forming units per gram.
Claims78
A method of making a paper-based product, the method comprising:
- substantially continuously treating a papermaking furnish with a biocide, wherein the furnish comprises from greater than 0% to 100% recycled fibers, and wherein the furnish has a microorganism level of greater than 5,000 colony forming units per gram;
- and
- forming the furnish into the paper-based product, wherein the paper-based product comprises at least one of a sizing chemical and a strength additive,
- wherein substantially continuously treating the furnish with the biocide reduces the microorganism level so that the paper-based product has a microorganism level of less than 5,000 colony forming units per gram.
A method of making a paper-based product, the method comprising:
- substantially continuously adding a biocide to a stock stream on a paper machine, wherein the stock stream includes from greater than 0% to 100% recycled fibers, the recycled fibers having a microorganism level of greater than 5,000 colony forming units per gram, and
- forming the paper-based product from the recycled fibers, wherein the paper-based product comprises at least one of a sizing chemical and a strength additive,
- wherein substantially continuously adding the biocide to the stock stream reduces the microorganism level of the recycled fibers so that the paperboard formed from the recycled fibers has a microorganism count of less than 5,000 colony forming units per gram.
A method of making a paper-based product, the method comprising:
- substantially continuously treating a papermaking furnish with a biocide, wherein the furnish comprises from greater than 0% to 100% recycled fibers, and wherein the furnish has a microorganism level of greater than 5,000 colony forming units per gram;
- adding at least one of a sizing chemical and a strength additive to the furnish;
- and
- forming the furnish into the paper-based product, wherein the paper-based product comprises the at least one of the sizing chemical and the strength additive,
- wherein substantially continuously treating the furnish with the biocide reduces the microorganism level so that the paper-based product has a microorganism level of less than 5,000 colony forming units per gram.
A method of making a paper-based product, the method comprising:
- substantially continuously adding a biocide to a stock stream of a paper machine, wherein the stock stream includes from greater than 0% to 100% recycled fibers, the recycled fibers having a microorganism level of greater than 5,000 colony forming units per grain;
- adding at least one of a sizing chemical and a strength additive to the stock stream;
- and
- forming the paper-based product from the recycled fibers, wherein the paper-based product comprises the at least one of the sizing chemical and the strength additive,
- wherein substantially continuously adding the biocide to the stock stream reduces the microorganism level of the recycled fibers so that the paperboard formed from the recycled fibers has a microorganism count of less than 5,000 colony forming units per gram.
A method of making a paper-based product, the method comprising:
- substantially continuously treating a papermaking furnish with a biocide, the furnish comprising from greater than 0% to 100% recycled fibers, wherein the furnish has a microorganism level of greater than 5,000 colony forming units per gram;
- forming the furnish into the paper-based product;
- and
- treating the paper-based product with at least one of a sizing chemical and a strength additive, so that the paper-based product comprises the at least one of the sizing chemical and the strength additive,
- wherein substantially continuously treating the furnish with the biocide reduces the microorganism level so that the paper-based product has a microorganism level of less than 5,000 colony forming units per gram.
Dependencies are inferred from the claim text.