Wet-resilient webs and disposable articles made therewith
First Claim
1. A low-density. noncompressively-dried, three-dimensional web comprising at least about 15 dry weight percent high yield pulp fibers to which a wet strength agent has been added, said web having a density of about 0.3 grams per cubic centimeter or less, an Overall Surface Depth of about 0.2 millimeter or greater, an In-Plane Permeability of about 5×
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11 square meters or greater and a Wet Compressed Bulk of about 6 cubic centimeters per gram or greater.
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Accused Products
Abstract
Paper sheets useful for tissues, paper towels, napkins, disposable absorbent products and the like can be made to exhibit a high degree of wet resiliency. This property is achieved by using a combination of high yield pulp fibers (such as bleached chemithermomechanical pulp fibers) and a wet strength agent in an uncreped throughdrying process. The resulting product, when wetted, can spring back after being crumpled in one'"'"'s hand.
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Citations
54 Claims
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1. A low-density. noncompressively-dried, three-dimensional web comprising at least about 15 dry weight percent high yield pulp fibers to which a wet strength agent has been added, said web having a density of about 0.3 grams per cubic centimeter or less, an Overall Surface Depth of about 0.2 millimeter or greater, an In-Plane Permeability of about 5×
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11 square meters or greater and a Wet Compressed Bulk of about 6 cubic centimeters per gram or greater. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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2. An uncreped through-air-dried web comprising at least about 10 dry weight percent virgin high yield pulp fibers to which a wet strength agent has been added, said web having a density of about 0.15 gram per cubic centimeter or less, a Wet Compressed Bulk of about 6 cubic centimeters per gram or greater and an Overall Surface Depth of about 0.3 millimeter or greater.
- 49. An absorbent article comprising a backsheet layer, a liquid permeable topsheet layer connected in a superposed relation with said backsheet layer, and a retention portion for storing liquid, said retention portion sandwiched between said topsheet layer and backsheet layer and including at least one uncreped through-air-dried sheet having a density of about 0.3 grams per cubic centimeter or less, a FIFE Test value of about 100 seconds or less, and an Overall Surface Depth of about 0.3 millimeter or greater, said sheet comprising at least about 20 dry weight percent high yield pulp fibers to which a wet strength agent has been added.
Specification