Heterogeneous surge material for absorbent articles

a technology of absorbent articles and surge materials, applied in the field of absorbent articles, can solve the problems of diapers, diapers, and diapers that may fail to absorb, and achieve the effect of high permeability layer

Inactive Publication Date: 2007-11-13
KIMBERLY-CLARK WORLDWIDE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]The objects of this invention are achieved by a surge material for personal care products which is a layered structure of at least one relatively high permeability layer and at least one relatively low permeability layer where the structure has a capillary tension range between about 1 and 5 cm with a differential of at least about 1 cm from top (wearer side) to bottom. Such a layered structure should provide a first...

Problems solved by technology

It has been found that urination can occur at rates as high as 15 to 20 milliliters per second and at velocities as high as 280 centimeters per second and that an absorbent garment, such as a diaper, may fail by leaking from the leg or front or back waist areas.
The inability of the absorbent product to rapidly uptake liquid can also result in excessive pooling of liquid on the body-facing surface of the bodyside liner before the liquid is taken up by the absorbent structure.
Such pooled liquid can wet the wearer's skin and can leak from leg or waist openings of the absorbent article, causing discomfort, potential skin health problems, as well as soiling o...

Method used

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  • Heterogeneous surge material for absorbent articles
  • Heterogeneous surge material for absorbent articles
  • Heterogeneous surge material for absorbent articles

Examples

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example 1

[0073]Example 1 is a through-air bonded carded web that contains 90 weight percent of a 1.8 denier, 1.5 inch (3.8 cm) conjugate sheath / core polyethylene / polyethylene terephthalate (PE / PET) fibers and 10 weight percent of a 1.5 denier, 1.5 inch rayon fiber. The PE / PET fibers are available from BASF Fibers, 6805 Morrison Boulevard, Charlotte, N.C. 28211-3577 and were conjugate sheath / core polyethylene / polyethylene terephthalate (PE / PET) fibers with a polyethylene glycol based C S-2 finish. The rayon fibers were 1.5 denier Merge 18453 fibers from Courtaulds Fibers Incorporated of Axis, Ala.

example 2

[0074]Examples 2 is a through-air bonded carded web that contains 90 weight percent of a 3.0 denier, 1.5 inch conjugate sheath / core PE / PET fibers and 10 weight percent of 1.5 denier, 1.5 inch rayon fiber. The PE / PET fibers are available from BASF Fibers, 6805 Morrison Boulevard, Charlotte, N.C. 28211-3577 and were conjugate sheath / core polyethylene / polyethylene terephthalate (PE / PET) fibers with a polyethylene glycol based C S-2 finish.

example 3

[0075]Examples 3 is a through-air bonded carded web that contains 90 weight percent of a 10.0 denier, 1.5 inch conjugate sheath / core PE / PET fibers and 10 weight percent of 1.5 denier, 1.5 inch rayon fiber. The PE / PET fibers are available from BASF Fibers, 6805 Morrison Boulevard, Charlotte, N.C. 28211-3577 and were conjugate sheath / core polyethylene / polyethylene terephthalate (PE / PET) fibers with a polyethylene glycol based C S-2 finish.

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Abstract

There is provided a surge material for personal care products comprising a layered structure of at least one relatively high permeability layer on a top side toward a wearer and at least one relatively low permeability layer where the structure has a capillary tension range between about 1 and 5 cm with a differential capillary tension of at least about 1 cm from top to bottom. The surge material should have a high permeability layer with a permeability of at least 1000 Darcys and a low permeability layer with a permeability of less than 1000 Darcys. The surge material should also have a said high permeability layer which has a permeability of at least 250 Darcys greater than the low permeability layer. Such a layered structure should have a first insult run-off value of at most 30 ml from a 100 ml insult delivered at 20 ml/second. Such a surge material is useful in personal care products like diapers, training pants, absorbent underpants, adult incontinence products, feminine hygiene products and the like.

Description

FIELD OF THE INVENTION[0001]This invention relates to absorbent articles particularly absorbent structures which are useful in personal care products such as disposable diapers, incontinence guards, child care training pants, or sanitary napkins. More particularly, the invention relates to absorbent articles which have a portion designed for rapid intake, temporary liquid control, and subsequent release of repeated liquid surges to the remainder of the article.BACKGROUND OF THE INVENTION[0002]Personal care products are absorbent articles including diapers, training pants, feminine hygiene products such as sanitary napkins, incontinence devices and the like. These products are designed to absorb and contain body exudates and are generally single-use or disposable items which are discarded after a relatively short period of use—usually a period of hours—and are not intended to be washed and reused. Such products usually are placed against or in proximity to the wearer's body to absorb...

Claims

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Application Information

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IPC IPC(8): B32B7/02B32B5/26A61F13/15
CPCA61F13/15203A61F13/53Y10T428/24992Y10T428/24942Y10S428/903Y10T442/621Y10T442/651Y10T442/614Y10T442/641Y10T442/659A61F13/15
Inventor DODGE, II, RICHARD NORRISELLIS, CLIFFORD JACKSONHETZLER, CONNIE LYNNKEPNER, ERIC SCOTTLITTLE, SYLVIA BANDYSAWYER, LAWRENCE HOWELLKRAUTKRAMER, CANDACE DYAN
Owner KIMBERLY-CLARK WORLDWIDE INC
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