Method for recovering pulp fibers from used absorbent article
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United States of America
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Jan 21, 2020
Grant Date -
Jun 20, 2019
app pub date -
Jun 9, 2017
filing date -
Jun 9, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method is provided for recovering pulp fibers having little damage from a used absorbent article which includes a water permeable front sheet, a water impermeable back sheet and an absorbent body that contains pulp fibers and a superabsorbent polymer. At least one opening with a circle equivalent diameter of 5-45 mm, or 10-45 mm cut, is made in the front sheet and/or the back sheet of the used absorbent article, which is then agitated in an organic acid aqueous solution with a pH of less than or equal to 2.5, and the superabsorbent polymer is deactivated and the pulp fibers and superabsorbent polymer are discharged from the used absorbent article through the opening or cut.
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International Classification(s)
- D21B:FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMEN....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- B09B:DISPOSAL OF SOLID WASTE
- B29L:INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RE....
- A61L:METHODS OR APPARATUS FOR STERILISING MATERIALS OR ....
- D21C:PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE ....
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