Barrier coating for adhesive labels
OwnerFrank Yen-Jer Shih, Anahit Tataryan +1inventors
InventorsFrank Yen-Jer Shih, Anahit Tataryan, William Joseph Buehne
Life of this patent
Estimating the term…
Abstract
A barrier coating is used in combination with a UV-cured adhesive on paperstock to prolong the tack and overall performance of the adhesive. Some aspects of the coating incorporate a chelating material to arrest or completely prevent the migration of unwanted ions, possibly including calcium ions, from moving between the paperstock and the adhesive in a manner that negatively impacts the adhesive. The resulting stock is particularly well-suited to labels and other similar uses.
Claims20
A sheet including adhesive to allow at least a portion of the sheet to be affixed to an object, the sheet comprising:
- an adhesive layer cured with ultraviolet radiation;
- a substrate layer positioned on an outer facing of the sheet, said substrate layer containing at least one multi-valent ionic species which migrates out of the substrate layer;
- and
- a barrier layer interposed between the adhesive layer and the substrate layer at all points where the adhesive layer would otherwise come into direct physical contact with the substrate layer, said barrier layer including a substance to apprehend migration of the multi-valent ionic species before the multi-valent ionic species comes into contact with the adhesive layer.
A method of prolonging a functional lifespan for an adhesive label cured by ultraviolet radiation, the method comprising:
- disposing a barrier layer comprising a multi-valent ionic retardant between an adhesive layer capable of activation by ultraviolet radiation and a substrate layer that, over time, releases multi-valent ionic species out of the substrate layer and into adjacent layers.
Dependencies are inferred from the claim text.