Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including a second component containing structurally defined...
Patent
1981-06-29
1983-03-08
Herbert, Jr., Thomas J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including a second component containing structurally defined...
428215, 428218, 428325, 428332, 428334, 428339, 428343, 428352, 428354, 428537, 428913, B32B 516, C08U 702, C09J 702
Patent
active
043761518
ABSTRACT:
A pressure threshold sensitive adhesive product which exhibits substantially no adhesive tack except upon the application thereto of a threshold pressure, e.g. about 50 pounds per square inch is disclosed. This adhesive product comprises a substrate having coated thereon a layer of a normally tacky, pressure-sensitive adhesive and a top layer of microspheres, preferably hollow microspheres, in an amount sufficient to cover the immediate adhesive layer. The application of the threshold pressure causes the microspheres to be displaced thereby exposing the normally tacky adhesive. The adhesive product is preferably manufactured by preparing a suspension of the microspheres in the normally tacky adhesive composition, coating the suspension on the substrate and promoting the microspheres to migrate to the top of the suspension and to form the top microsphere layer.
REFERENCES:
patent: 2655453 (1953-10-01), Sandberg
patent: 2907682 (1959-10-01), Eichel
patent: 2988461 (1961-06-01), Eichel
patent: 3314838 (1967-04-01), Erwin
patent: 3565247 (1971-02-01), Brochman
patent: 3639137 (1972-02-01), Marinelli
patent: 4223067 (1980-09-01), Levens
Herbert, Jr. Thomas J.
Moore Business Forms Inc.
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