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US 8,283,516 B2Granted
Absorbent product with low dryness index
OwnerJohn D. Litvayinventor
Life of this patent
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Abstract
The embodiments provide an absorbent garment, such as a disposable diaper, incontinent pad, sanitary napkin, and the like, that has an absorbent core that provides for a long term dryness profile. The dryness profile reflects real world long term usage of absorbent products. Such new absorbent garments can be constructed with absorbent cores containing synthetic fibers and super absorbent particulates.
Claims17
An absorbent product comprising:
- a. a liquid permeable top sheet;
- b. an absorbent core comprising:
- i. synthetic fibers;
- ii. super absorbent particulate having a centrifuge retention capacity (CRC) within the range of from about 29 to about 41;
- and
- c. a back sheet
- wherein the absorbent core has a dryness index in the range of between about 0 to about 50 gm/180 min, and
- wherein the dryness index is determined by first measuring the rewet values of an absorbent garment at various time intervals, in which the rewet values are measured for 3 insults of 50 mls each of 1.0% saline solution, each insult producing a rewet curve, and the area under each curve is determined by integrating the curve to measure the rewet, and then calculating the dryness index as the sum of the areas of the three curves, in accordance with the following equation:
- Dryness
-
-
- index
- =
- ∑
- n
- =
- 1
- 3
-
-
- ∫
- (
- rewetcurve
- )
-
- n
- .
24 more elements
An absorbent product comprising:
- a. a liquid permeable top sheet;
- b. an absorbent core comprising an absorbent material comprising:
- i. synthetic fibers;
- ii. super absorbent particulate having a centrifuge retention capacity (CRC) within the range of from about 29 to about 41;
- and
- iii. substantially no wood-based fluff pulp
- c. a back sheet
- wherein the absorbent core has a dryness index of less than about 200 gm/180 min, and
- wherein the dryness index is determined by first measuring the rewet values of an absorbent garment at various time intervals, in which the rewet values are measured for 3 insults of 50 mls each of 1.0% saline solution, each insult producing a rewet curve, and the area under each curve is determined by integrating the curve to measure the rewet, and then calculating the dryness index as the sum of the areas of the three curves, in accordance with the following equation:
- Dryness
-
-
- index
- =
- ∑
- n
- =
- 1
- 3
-
-
- ∫
- (
- rewetcurve
- )
-
- n
- .
25 more elements
Dependencies are inferred from the claim text.