Multilayer pressure-sensitive adhesive label constructions

• Main Authors: Ko, Chan U, Sartor, Luigi, Koch, Carol A, Keller, Paul, Brown, Ian, Min, Kyung W, Xie, Li, Mallya, Prakash, Li, Kai
• Format: Patent
• Language: English
• Published: 15.04.2003

The present invention relates to multilayer pressure-sensitive adhesive (PSA) constructions that exhibit a balance of high adhesive performance (including low temperature performance), good convertibility, improved wet-out on plastic substrates, improved haze and low contaminant build-up in printers for paper and film applications. Multilayer PSA label constructions that achieve a good balance of properties, namely, adhesive performance, convertibility, and laser printer performance, and, optionally, good wet-out on plastic substrates and low haze. The multilayer PSA construction comprising a facestock, a multilayer adhesive coating, and a release liner. The adhesive coating is made of a face side adhesive (FSA) layer comprising a first emulsion acrylic PSA, which is in contact with the inner surface of the facestock, and a liner side adhesive (LSA) layer, comprising a second emulsion acrylic PSA different from the first acrylic PSA, which is in contact with the FSA. The adhesive coating has a coat weight of less than about 26 g/mand a flow of less than about 50 m at room temperature. The construction exhibits a loop tack value of at least about 3.5 N/25 mm at 5° C. on a polyethylene substrate. It has been discovered that multilayer PSA label constructions exhibiting these properties also exhibit good convertibility and laser printer performance.