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US 11,879,210 B2Granted
Method for producing softwood-derived pulp fibers for paper and softwood-derived pulp fibers for paper
AssigneeUnicharm Corporation
InventorsTakeshi Bandou, Takayoshi Konishi
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Abstract
A method of producing conifer-derived pulp fibers for paper includes a beating step of beating conifer-derived material pulp fibers in the presence of a liquid including water; and an ozone treatment step of treating, with ozone water, the beaten conifer-derived material pulp fibers.
Claims8
A method of producing conifer-derived pulp fibers for paper, the method comprising:
- a deriving step of deriving conifer-derived pulp fibers from used absorbent articles;
- after the deriving step, a supply step of supplying the conifer-derived pulp fibers as conifer-derived material pulp fibers;
- a beating step of beating the conifer-derived material pulp fibers supplied by the supply step in the presence of a liquid including water to form beaten material pulp fibers;
- and
- an ozone treatment step of treating the beaten material pulp fibers with ozone water to form pulp fibers for paper.
2 more elements
Dependencies are inferred from the claim text.