Distribution strip for absorbent products
View Patent ↗Disclosed are absorbent structures for use in disposable absorbent products for absorbing bodily fluids, wherein the absorbent structure includes a fluid storage layer including matrix fibers and a superabsorbent polymer for receiving fluids and a distribution strip positioned below the fluid storage layer. The distribution strip includes cellulosic fibers and has a basis weight of between 45 grams per square meter and 140 grams per square meter and a density of between 0.20 grams per cubic centimeter and 0.60 grams per cubic centimeter.
1. A distribution strip for use in an absorbent structure comprising cellulosic fibers selected from the group consisting of cotton linters, mercerized cellulose, chemically treated cellulose and mixtures thereof, wherein the chemically treated cellulose is treated with a polyvalent ion selected from the group consisting of aluminum, calcium, magnesium and mixtures thereof, and the distribution strip has a basis weight of between 45 grams per square meter and 140 grams per square meter and has a density of between 0.25 grams per cubic centimeter and 0.55 grams per cubic centimeter.
2. The distribution strip of claim 1 , wherein the distribution strip has a basis weight of between 75 grams per square meter and 110 grams per square meter.
3. The distribution strip of claim 1 , wherein the distribution strip is made by a wet-laid process.
4. The distribution strip of claim 1 , wherein the distribution strip is made by an air-laid process.
5. The distribution strip of claim 1 , wherein one hour after three 100 ml insults to the structure at 20 minute intervals in a last three inches of the fluid storage layer longitudinal and transverse horizontal wicking test, the fluid storage layer has horizontal wicking of 22 g/g or greater.
6. The distribution strip of claim 1 , wherein the distribution strip has a fluid distribution rate of 0.05 grams per second or greater.