Method for making a liquid absorbent pad

DETAILED DESCRIPTION It is an object of the present invention to provide a disposable absorbent padding material which overcomes the drawbacks of the prior art.
It is a principal object of the invention to solve the problems, as mentioned above, by configuring an absorbent pad separately of a basic sheet and bonding this absorbent pad to the inner surface of the basic sheet to obtain the desired corrugated configuration.
It is an object of this invention to provide a disposable absorbent pad formed with a plurality of transversely alternate troughs and crests extending longitudinally.
Briefly stated, the present invention provides a liquid absorbent pad which includes an elastically stretchable basic sheet upon which an absorbent core is periodically bonded.
The absorbent core is bonded while the basic sheet is stretched.
The absorbent core includes a structure which encourages the formation of corrugations therein when the basic sheet is released.
The corrugations enable the flow of material in the troughs of the corrugations, and thereby reduce soilage of the upper surface of the absorbent core by fecal matter.
The liquid absorbent pad is suitable for undergarment use in which the basic sheet includes a waist opening and a pair of leg openings.
In one embodiment, the structure which encourages the formation of corrugations includes gaps between adjacent strips of absorbent material.
In another embodiment, the structure is periodic regions of reduced density or rigidity.
In a further embodiment, the structure includes periodic longitudinal indentations alternating on opposite sides of the absorbent pad.
According to an embodiment of the invention, there is provided a liquid absorbent pad comprising: a first substantially planar element, at least part of the first substantially planar element being an absorbent material, a second substantially planar element, the second substantially planar element being stretchable, the first substantially planar element including parallel portions having one of a greater flexibility and a lower rigidity than a remainder thereof, the first planar element being fastened to the second planar element at a plurality of places while the second substantially planar element is stretched, whereby, when the second substantially planar element is released, the first substantially planar element is deformed into corrugations along the parallel portions having a greater flexibility