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Heat‐activated pressure sensitive adhesives for linerless labels
Author(s) -
Einsla Melinda,
Griffith William,
Himmelberger Daniel,
Zolynski Sarah,
Zhang Sipei,
Powell Terri,
Malotky David
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47048
Subject(s) - adhesive , plasticizer , pressure sensitive , copolymer , materials science , dispersant , silicone , polymer , polymer chemistry , chemical engineering , composite material , polymer science , dispersion (optics) , physics , layer (electronics) , optics , engineering
Pressure‐sensitive adhesives (PSAs) suitable for use in label applications without a silicone‐coated release liner (so‐called “linerless” labels) were developed utilizing heat‐activated adhesive formulations comprised of dispersed styrenic block copolymers (SIS), dispersed plasticizers, and dispersed tackifiers. Various grades of SIS were investigated, as well as several different dispersants. The best results were obtained with an SIS polymer with 19% diblock dispersed with a long‐chain primary carboxylic acid. Of the four plasticizers studied, sucrose benzoate resulted in the best combination of high peel and low blocking in the end‐use application. Peel forces upwards of 10 N/25 cm were obtained for the heat‐activated adhesive, indicating their applicability for many label applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47048.