초록 ▼

The present invention provides absorbent articles, such as disposable diapers, which utilize substantially water-insoluble hydrogel material to enhance the absorbent capacity of such articles. In these articles, the hydrogel material, combined in particulate form with hydrophilic fiber material, is

The present invention provides absorbent articles, such as disposable diapers, which utilize substantially water-insoluble hydrogel material to enhance the absorbent capacity of such articles. In these articles, the hydrogel material, combined in particulate form with hydrophilic fiber material, is primarily placed in a lower fluid storage layer of the absorbent core of the article. Such a fluid storage lower layer of the absorbent core is placed underneath an upper, preferably larger, fluid acquisition/distribution layer containing little or no hydrogel. This lower fluid storage layer is positioned in such a manner that at least about 75% of the hydrogel in the lower layer is found in the front two-thirds of the absorbent article and such that at least about 55% of the hydrogel in the lower layer is found in the front half of the absorbent article. Absorbent articles of this type make especially effective and efficient use of the hydrogel material and may also provide a diaper rash control benefit. Absorbent cores of the type utilized in such articles are also disclosed.

대표청구항 ▼

A disposable absorbent article comprising: (A) a liquid impervious, elongated backing sheet; (B) a relatively hydrophobic, liquid pervious topsheet; and (C) a layered absorbent core positioned between said backing sheet and said topsheet, said core comprising: (i) an upper fluid acquisition/distribu

A disposable absorbent article comprising: (A) a liquid impervious, elongated backing sheet; (B) a relatively hydrophobic, liquid pervious topsheet; and (C) a layered absorbent core positioned between said backing sheet and said topsheet, said core comprising: (i) an upper fluid acquisition/distribution layer having a density of from about 0.05 to 0.25 g/cm3 and consisting essentially of hydrophilic fiber material and from 0% to about 8% by weight of said upper layer of particles of substantially water-in-soluble hydrogel material; and (ii) a lower fluid storage layer having a density of from about 0.06 to 0.3 g/cm3 and consisting essentially of a substantially uniform combination of hydrophilic fiber material and from about 9% to 60% by weight of said lower layer of particles of substantially water-insoluble hydrogel material; said lower fluid storage layer having a top surface area which is from about 0.25 to 1.0 times that of said upper fluid acquisition/distribution layer and said lower fluid storage layer further being positioned relative to said backing sheet and said upper layer in a manner such that at least about 75% of the hydrogel material in said lower layer is found within the front two-thirds section of said absorbent article and such that at least about 55% of the hydrogel material in said lower layer is found within the front half section of said absorbent article.