Low-Tack, UV-Cured Pressure Sensitive Adhesive Suitable for Reclosable Packages

摘要

UV-cured pressure sensitive adhesive including one or more UV-curable acrylic oligomers, one or more tack control components, and, optionally, an elastomeric material is described herein. The adhesive includes an adhesive component ratio of the various adhesive components effective to provide desired first peel adhesions and subsequent peel adhesions.

主权项

1. A package having an adhesive -based reclosable fastener, the package comprising:
one or more walls forming a cavity for receiving one or more products; opposing panels of the one or more walls; a UV-curable pressure sensitive adhesive disposed between the opposing panels, the UV-curable pressure sensitive adhesive including a UV-curable acrylic oligomer, a tack control component, and optionally at least one elastomeric material; an adhesive component ratio (ACR) of the pressure sensitive adhesive defined by formula (A) where the weight percent of the UV-curable acrylic oligomer relative to the sum of the weight percents of the tack control component and the elastomeric material is about 0.5 to about 1.5(UV-curableacrylicoligomer)(tackcontrolcomponent+elastomericmaterial);(A) the ACR effective so that a UV-cured pressure sensitive adhesive forms a first peel adhesion force of about 200 to about 900 grams per linear inch (gpli) and up to five subsequent peel adhesions each about 30 to about 200 percent of the first peel adhesion and a first subsequent peel adhesion after fouling with debris at least about 50 percent of the first peel adhesion; and when the opposing panels are separated, the UV-curable pressure sensitive adhesive exhibits a cohesive separation leaving opposing portions of the UV-curable pressure sensitive adhesive on each of the separated opposing panels.