Method of multi-layer coating

Details Method of multi-layer coating Method of multi-layer coating

1976-03-22

1977-01-04

Husack, Ralph

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

96 85, 427402, 427414, 427420, G03C 174, B05D 134

Patent

active

040010244

ABSTRACT:
The simultaneous high speed application of a plurality of liquid coating compositions to a moving web by the method of multi-layer bead coating is improved by coating the lowermost layer as a thin layer formed from a low viscosity coating composition and coating the layer immediately above the lowermost layer as a thicker layer of higher viscosity such that vortical action of the coating bead is confined to the lowermost layer and the layer immediately above it. By this means, intermixing of the coating composition forming the lowermost layer with the coating composition forming the layer immediately above it occurs, but all other layers are coated in discrete form. The method is especially useful in the manufacture of multi-layer photographic films and papers.

REFERENCES:
patent: 2761791 (1956-09-01), Russell
patent: 2932855 (1960-04-01), Bartlett et al.
patent: 2975754 (1961-03-01), Wright
patent: 3206323 (1965-09-01), Miller et al.
patent: 3508947 (1970-04-01), Hughes
patent: 3573965 (1971-04-01), Ishiwata et al.
patent: 3749053 (1973-07-01), Timson

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