ADHESIVE COMPOSITION FOR PEELABLE PRESSURE SENSITIVE ADHESIVE LABEL

摘要

PROBLEM TO BE SOLVED: To provide a hot melt pressure sensitive adhesive (HMPSA) composition; a layer of the HMPSA composition; a multilayer system having a printable supporting layer and an adjacent protective layer; a corresponding self-adhesive label; and a method for recycling an article with a label comprising immersing an article in a high-temperature aqueous basic solution to peel a label.SOLUTION: A hot melt pressure sensitive adhesive (HMPSA) composition comprises the following (a) to (c): (a) 25 to 50 wt.% of a mixture of SBS-type and SB-type styrene block copolymers; (b) 45 to 75 wt.% of a compatible tackifying resin having a softening temperature of 80 to 150°C; and (c) 0.5 to 5.5 wt.% of a fatty acid having a hydrocarbon chain having 10 to 22 carbon atoms.