Fluid activatable adhesive for glue-free, liner-free, labels for glass and plastic substrates and methods of use thereof

摘要

Methods for applying a liner-free, or liner-less label, to a substrate, particularly glass or plastic (e.g., polyethylene terephthalate) substrates, are described herein. The method includes applying an adhesive composition, such as a polymeric coating, to a label face sheet, activating the adhesive composition with an activating fluid, and contacting the label to the substrate. The activating fluid is preferably a mixture of water and one or more organic solvents, such as low molecular weight alcohols.

主权项

1. A method for applying a liner-free label to a substrate, wherein the label comprises a non-tacky polymeric coating on a face sheet, the method comprising:
activating the polymeric coating with an activating fluid comprising water and one or more organic solvents to form a tacky coating, and contacting the label to the substrate, wherein the polymeric coating comprises one or more alkaline soluble polymers selected from the group consisting of styrene-maleic anhydride resins, esters of styrene-maleic anhydride resins, styrene-maleic anhydride amic acid resins, styrene-maleic anhydride imide resins, ammonium and alkali metal salts of styrene-maleic anhydride resins, and combinations thereof and one or more emulsion polymers, wherein the alkaline soluble polymer is water-insoluble at neutral pH.