Method of forming a fibrous web

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

156181, 156276, A61F 1316

Patent

active

039752224

ABSTRACT:
A method of producing a disposable diaper and the diaper produced thereby are disclosed. The disposable multi-layer diaper includes at one side a porous fibrous facing layer to be brought into contact with an infant's skin, and includes at the other side a water impervious backing sheet, with a double contoured cross-sectional batt being interposed between the facing layer and backing sheet. The batt is smoothly contoured by increased fiber content along the transverse and longitudinal medians from the edges to the center of the batt. The batt is positioned in face-to-face engagement with the backing sheet. The batt and lateral extremities of the facing layer which extend beyond the batt are each adhered to the backing sheet. In a preferred embodiment of the invention, a paper-like, densified, highly compacted cellulosic layer is formed integrally with the batt and is positioned in face-to-face engagement with the backing sheet.
The method provides a transverse peak in an air-laid web by simultaneously feeding to an individualizing station two continuous strips of compacted fibers, one strip being narrower than the other and lying along the longitudinal median of the other, the individualized fibers then being deposited on a moving foraminous belt from an air stream. Longitudinal peaks are provided by varying the rate of feed of the continuous strips to the individualizing station.

REFERENCES:
patent: 850151 (1907-04-01), Goldman
patent: 3612055 (1971-10-01), Mesek
patent: 3682761 (1972-08-01), Lee et al.
patent: 3729005 (1973-04-01), Lee et al.
patent: 3763863 (1973-10-01), Mesek et al.
patent: 3766922 (1973-10-01), Krusko
patent: 3860002 (1975-01-01), Kolbach

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