A new styrene-butadiene copolymer (SBC) has low-temperature shrinkage control for use in shrink-sleeve labels while also maintaining high clarity, gloss, and stiffness.

A new styrene-butadiene copolymer (SBC) has low-temperature shrinkage control for use in shrink-sleeve labels while also maintaining high clarity, gloss, and stiffness. K-Resin RK54 from Chevron Phillips Chemical Co., The Woodlands, Texas, is claimed to have a “gentle shrink curve” that provides the packager with excellent low-temperature conformity in full or partial body labels while maintaining strong aesthetics. The typical shrink curve starts at 60 C and reaches maximum shrinkage of at least 75% at 95 C, according to Chevron Phillips. K-Resin RK54 has lower density (around 1.02 g/cc) than PVC, PETG, or OPS film, resulting in a 20% to 30% greater yield.