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US 3,989,867 AGranted
Absorptive devices having porous backsheet
AssigneeThe Procter & Gamble Company
InventorJames Bryant Sisson
Life of this patent
Estimating the term…
Abstract
Absorptive device having a breatheable backsheet resistant to aqueous liquid passage, wherein the backsheet has bosses and small apertures at the apex of the bosses, the apexes of the bosses being located adjacent the absorbent body with which the backsheet is associated.
Claims17
An absorptive device, comprising:
- an absorbent body;
- and
- a backsheet of a material having the characteristics of polyethylene film in direct contact with and substantially entirely underlying the absorbent body;
- the backsheet having a plurality of tapered hollow bosses therein extending towards the absorbent body with each boss having an aperture extending through the apex thereof forming a tapered pore in the backsheet which enlarges in a direction away from the absorbent body;
- the dimension of the pores being selected so that, when the absorptive device is placed to receive liquids such as discharges from a human body with the absorbent body positioned between the human body and the backsheet, the liquids absorbed by the absorbent body and contained within the absorptive device are blocked from passage through the backsheet while vapors pass readily through the pores of the backsheet.
2 more elements
An absorptive device, comprising:
- an absorbent body;
- and
- a backsheet having the characteristics of polyethylene film in direct underlying contact with the absorbent body;
- the backsheet having a plurality of generally conical bosses therein, each boss being provided with an aperture extending through the apex thereof;
- the bosses being pointed toward the absorbent body with the apices of the bosses adjacent the absorbent body;
- the included angle within each boss being between about 60.degree. and 100.degree.;
- each aperture having a diameter which is a maximum of about 50 micrometers;
- the open area of the backsheet being in the range of from about 1 to 5 percent of the available area of the backsheet;
- to provide an absorptive device which retains liquids gathered therein while permitting vapor within the absorptive device to escape to the surrounding atmosphere.
6 more elements
Dependencies are inferred from the claim text.