Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1982-05-14
1985-11-05
Bell, James J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428246, 428252, 428283, 428284, 428286, 428287, 428327, 428343, 428354, 428402, 428403, 428407, B32B 516
Patent
active
045513813
ABSTRACT:
A new and unique coating film comprises a basic layer of flexible fibrous material, a layer of liquid coating material applied thereon and a layer of powder coating material placed on the layer of liquid coating material. After the powder coating material is distributed, the obtained layer structure is subjected to heat treatment until the former is molten and it is then cured after cooling.
A method of preparing a coating film comprises applying liquid coating material onto a basic layer of fibrous material, uniformly distributing powder coating material over the surface of the layer of liquid coating material while the latter is still in a liquid state, and subjecting the obtained layer structure to heat treatment until the powder coating material is molten, after which it is cured after cooling. If colored liquid coating material is used, a layer of second transparent liquid coating material may be interposed between the colored liquid coating material and the powder coating material. Alternatively, a mixture of liquid and powder coating materials may be applied onto the basic layer of fibrous material. When a layer of colored liquid coating material is provided, it may be located between the fibrous material and the mixture of transparent liquid coating material and powder coating material.
REFERENCES:
patent: 2320866 (1943-06-01), Hill
patent: 3400036 (1968-09-01), Hemrick et al.
patent: 3547674 (1970-12-01), Draper et al.
patent: 3620366 (1971-11-01), Parkinson
patent: 3762975 (1973-10-01), Iwasaki et al.
patent: 3975563 (1976-08-01), Franer et al.
patent: 4256805 (1981-03-01), Tugukuni et al.
patent: 4396661 (1983-08-01), George et al.
"Powder Coatins", vol. 61, No. 1, Jun. 1983, pp. 1-5.
"Encyclopedia of Chemical Technology", vol. 19, pp. 1-27, John Wiley & Sons, 1982.
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