Method for reducing the increase in dividing value during the manufacture of no label' look labels

摘要

#CMT# #/CMT# Acrylic dispersion adhesive for producing laminates for "no label look" labels contains a UV absorber selected from benzoate ester, cinnamate ester, benzophenone and camphor derivatives, octocrylene and avobenzone. #CMT# : #/CMT# Independent claims are also included for: (1) laminate for "no label look" labels, comprising a carrier film or paper with a radiation-cured release coating, an adhesive layer comprising an adhesive as above, and a transparent face stock; (2) producing a laminate as above by applying the release coating onto the carrier film or paper, applying and optionally hardening the adhesive, and laminating the face stock onto the adhesive. #CMT#USE : #/CMT# Acrylic dispersion adhesive for producing laminates for "no label look" labels. #CMT#ADVANTAGE : #/CMT# The UV absorber reduces the increase in release value that normally occurs when labels coated with the adhesive and covered with a release liner are printed, the release value being the force required to pull off the release liner #CMT#ORGANIC CHEMISTRY : #/CMT# The UV absorber is preferably 4-t-butylphenyl, phenyl or octylphenyl salicylate, dibenzoylresorcinol, di(4-t-butylbenzoyl)resorcinol, benzoylresorcinol, 2,4-di-t-butylphenyl, octadecyl or 2-methyl-4,6-di-t-butylphenyl 3,5-di-t-butyl-4-hydroxybenzoate, hexadecyl or isononyl benzoate, ethyl 4-aminobenzoate, ethyl or octyl 4-methoxycinnamate, isoamyl or 2-ethylhexyl cinnamate, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, octocrylene, avobenzone or 4-methylbenzylidene camphor. #CMT#EXAMPLE : #/CMT# The release value of a laminate produced using CR 62 adhesive increased from 4 to 8 cN/2.5 cm after UV irradiation. Incorporating isoamyl cinnamate into the adhesive prevented this increase.