Impregnating foam with liquid fabric conditioner

Details Impregnating foam with liquid fabric conditioner Impregnating foam with liquid fabric conditioner

1977-04-07

1979-06-26

Lawrence, Evan K.

Coating processes

Foraminous product produced

Filter, sponge, or foam

118249, 118250, 427361, 427365, 427369, 427374D, B05D 128, B05D 312

Patent

active

041593561

ABSTRACT:
Heat activated, fabric conditioning products are made by impregnating a thick, absorbent substrate with fabric-conditioner chemicals. Such products are designed for use at elevated temperatures encountered in laundry dryers. This invention provides a process for impregnating the substrate with liquid fabric conditioning chemicals. By limiting the volume of impregnate in contact with the substrate during compression of the substrate in a nip, precise control is obtained over both the quantity of impregnate and the uniformity of the impregnate in the substrate. It is critical that the volume of impregnate available at the nip be limited to a volume equal to or less than the apparent void volume of the substrate when compressed to a thickness equal to the nip gap.

REFERENCES:
patent: 47427 (1865-04-01), Kelley
patent: 3360415 (1967-12-01), Hellman et al.
patent: 3686025 (1972-08-01), Morton
patent: 3870145 (1975-03-01), Mozuno
patent: 3894165 (1973-05-01), Bates

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