Method of manufacturing discontinuous pattern on a support material
AssigneeEsselte Pendaflex Corporation
InventorJohn V. Shepherd
Life of this patent
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Abstract
Discontinuous transferable adhesive layers have been proposed for manufacture by printing or by coating and subsequent stripping of a matrix to leave a plurality of individual areas of adhesive. Such processes are slow and difficult to effect leading to increased cost. According to the invention, a coating composition is continuously coated on to a release substrate, the composition and drying thereof being selected that, at the end of drying, the adhesive composition is present as a plurality of discrete areas. This may be effected, e.g. by coating an emulsion and drying down appropriately.
Claims9
In a method of manufacturing a discontinuous adhesive product consisting of a substrate having a release surface and a plurality of areas of adhesive composition distributed on the surface, each such area being removable from the surface by the application of a receptor to the exposed faces of the individual areas of adhesive composition and peeling apart the receptor and release surfaced substrate, the areas of adhesive composition adhering, preferentially, to the receptor, which method comprises applying a continuous layer of liquid coating composition to the release surface in liquid form, and drying the liquid coating composition to semi-solid form, the improvement comprising selecting the adhesive composition such that, during drying, the continuous layer of coating composition breaks up into a plurality of discrete areas.
A method of making a discontinuous adhesive product comprising:
- a) providing a substrate having a release surface;
- b) selecting a double-emulsion coating composition comprising an aqueous continuous phase, a first discontinuous phase of an acrylic polymer adhesive composition, and a second discontinuous phase of an immiscible hydrocarbon solvent, wherein said adhesive composition in semi-solid form is removable from the release surface by the application of a receptor to the adhesive composition and adherent to the receptor;
- c) applying a continuous liquid layer of said coating composition to the release surface;
- and
- d) drying the coating composition to semi-solid form, wherein during said drying step the continuous liquid layer of said coating composition breaks up in to a plurality of discrete areas of said adhesive composition distributed on the release surface.
Dependencies are inferred from the claim text.