Method of making absorbent pads

Details Method of making absorbent pads Method of making absorbent pads

1975-03-26

1976-12-28

Whitby, Edward G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

128296, 156220, 156228, 156246, 156289, 264 464, 264321, 428314, 428321, 260 25L, 260 25H, B32B 518

Patent

active

040000281

ABSTRACT:
A procedure is provided for producing a laminate having a crushed, polymeric latex foam, preferably thermoset, bonded either to a non-woven absorbent layer which is bonded to an absorbent layer or bonded directly to the absorbent layer, which in turn is bonded to a liquid-impermeable film or gauze. The crushed foam is self-bonded to the non-woven or absorbent layer, i.e., no adhesive is needed to bond the crushed foam. The foam may be applied by either of two methods. One procedure comprises applying a thin layer of foamed latex of a thermosettable polymer on a release medium and drying without causing thermosetting. The dry foam, still on the release paper, is then bonded to the absorbent layer when crushed by pressure. The thermosetting may be done simultaneously with bonding or subsequent thereto. A second method comprises applying the foam directly on the non-woven and drying, bonding and crushing as described above. The absorbent layer is preferably a non-textile, such as woodpulp wadding, so that it disintegrates upon flushing into a sewage system.

REFERENCES:
patent: 2961029 (1960-11-01), Rainar
patent: 3067747 (1962-12-01), Wolterding et al.
patent: 3553047 (1971-01-01), Godden
patent: 3649325 (1972-03-01), Affeldt
patent: 3714078 (1973-01-01), Gordon et al.
patent: 3891487 (1975-06-01), Hoey

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