Moisture-permeable disposable diapers
AssigneeKao Soap Co., Ltd.
InventorsKazunori Nishizawa, Toshihiro Shirase, Hiroshi Mizutani
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Abstract
A disposable diaper comprising a urine-permeable surface sheet, a urine-impervious backing sheet and an absorbent pad interposed between said two sheets, said disposable diaper being characterized in that the urine-impervious backing sheet comprises at least two layers, the first layer being a substantially urine-impermeable, vapor-permeable sheet, and the second layer being a urine-impermeable sheet which is perforated at an aperture ratio lower than 30%, said first and second layer being integrally formed.
Claims7
A disposable diaper comprising a urine-permeable surface sheet, a urine-impervious vapor-permeable backing sheet and an absorbent pad interposed between said two sheets, said diaper being characterized in that the urine-impervious vapor-permeable backing sheet comprises at least two layers, the first layer being a substantially urine-impervious vapor-permeable non-woven fabric sheet having pores of a diameter smaller than 50.mu., said non-woven fabric sheet being composed of hydrophobic thermoplastic fibers, the second layer being a sheet which is rendered vapor-permeable by perforations with an aperture ratio of from 2 to 30%, said first and second layer being integrally formed whereby the vapor permeation of the backing sheet is controlled.
Dependencies are inferred from the claim text.