Reducing odor in absorbent products
View Patent ↗Hydrogen sulfide is removed or reduced in absorbent products by the use of a particulate material attached to pulp fiber by a retention aid. The particulate material can remove or reduce the hydrogen sulfide in the environment surrounding the fiber. Suitable materials are zinc oxide, calcium oxide, cupric oxide, magnesium oxide, manganese dioxide, manganese oxide and aluminum oxide. Zeolites are also suitable. The particulate material may be combined with a filler prior to attachment to the fiber.
1. A pulp fiber having a particulate material attached thereto by a retention aid, said particulate material being capable of reducing the amount of hydrogen sulfide present in the environment surrounding said pulp fiber, said particulate material being present in an amount ranging from 0.005 weight % to 1 weight % of the oven dry weight of the pulp fiber, wherein said retention aid is a water soluble polymer.
2. The pulp fiber of claim 1 in which said particulate material is selected from the group consisting of zinc oxide, calcium oxide, cupric oxide, magnesium oxide, manganese dioxide, manganese oxide and aluminum oxide.
3. The pulp fiber of claim 1 in which said particulate material is a zeolite.
4. The pulp fiber of claim 1 in which said fiber is present in the form of a pulp sheet.
5. The pulp fiber of claim 4 in which said pulp sheet is wet laid.
6. The pulp fiber of claim 5 in which said pulp sheet has a basis weight of at least 250 g/m2.
7. The pulp fiber of claim 1 in which said fiber is in an absorbent product.
8. A pulp fiber having a particulate material and a filler material attached to said fiber by a retention aid, said particulate material being capable of reducing the amount of hydrogen sulfide present in the environment surrounding said pulp fiber, said particulate material and said filler being different, wherein said retention aid is a water soluble polymer.
9. The pulp fiber of claim 8 in which said filler material is present in an amount of 1 to 20 weight percent of the oven dry weight of the fiber.
10. The pulp fiber of claim 9 in which said particulate material is present in an amount of 0.5 to 50 weight percent of the weight of said filler material.
11. The pulp fiber of claim 8 in which said fiber is present in the form of a pulp sheet.
12. The pulp fiber of claim 11 in which said pulp sheet is wet laid.
13. The pulp fiber of claim 12 in which said pulp sheet has a basis weight of at least 250 g/m2.
14. The pulp fiber of claim 8 in which said fiber is present in an absorbent product.
15. A method of making a wet laid cellulose pulp product comprising slurrying cellulose fibers in a dilute aqueous suspension, said cellulosic fibers having surfaces, using a retention aid to coat the surfaces of said fibers with at least 1%, based on the combined weight of filler material, particulate material and cellulose, of a finely divided noncellulosic filler material and a particulate material being capable of reducing the amount of hydrogen sulfide present in material surrounding said pulp fiber, wherein said retention aid is a water soluble polymer, forming the fibers into a sheet and drying the sheet.