Preparation and Color Properties of Rapid-curing UV Filling Adhesives

ZHANG Jiacheng; LAN Chunxiao; LI Yuelu; FENG Miaolei; HUANG Meiling; SHI Jinke; CHEN Xiangting; WEI Yanli; HUANG Lijie; ZHAO Hui; DUAN Qingshan

doi:10.19554/j.cnki.1001-3563.2026.13.018

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (13) : 156-162. DOI: 10.19554/j.cnki.1001-3563.2026.13.018

Advanced Materials

Preparation and Color Properties of Rapid-curing UV Filling Adhesives

ZHANG Jiacheng¹, LAN Chunxiao¹, LI Yuelu¹, FENG Miaolei¹, HUANG Meiling¹, SHI Jinke¹, CHEN Xiangting¹, WEI Yanli¹, HUANG Lijie^1*, ZHAO Hui², DUAN Qingshan¹

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Abstract

The work aims to develop a rapid-curing UV filling adhesive and investigate the effect of color masterbatch concentration on its color properties, so as to address the issues of slow curing speed and limited color options in traditional UV filling adhesives. A hybrid ultraviolet (UV) curing system was constructed with polyurethane acrylate and epoxy acrylate as the matrix. The effects of nano-titanium dioxide (TiO₂), sodium carboxymethyl cellulose (CMC-Na), and four color masterbatches on the photopolymerization kinetics, mechanical properties, thermal stability, and CIELAB color parameters of the material were systematically investigated. Experimental results indicated that the optimal resin mass ratio for the system was 2:8 (shadow glue:photosensitive resin), with an optimal photoinitiator 2959 loading of 1%. Nano-TiO₂ exhibited a significant "light scattering enhancement effect" at low concentrations (0.5%-1%), reducing the curing time to 2 s, while higher concentrations led to curing retardation due to the "inner filter effect". CMC-Na significantly improved material toughness by forming an interfacial hydrogen-bonding network, increasing the elongation at break to 33.2% at a loading of 2 wt%. The incorporation of color masterbatches prolonged the curing time due to competitive absorption with the photoinitiator, with the retardation degree following the order: blue > green > yellow > red. The modified UV filling adhesive system successfully balances the conflict between curing efficiency and physical properties, achieves digital linear regulation of color, and provides a theoretical foundation and engineering solution for the seamless aesthetic repair of high-end packaging products.

Key words

photopolymerization kinetics / UV filling adhesive / color properties / nano-titanium dioxide / sodium carboxymethyl cellulose (CMC-Na)

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ZHANG Jiacheng, LAN Chunxiao, LI Yuelu, FENG Miaolei, HUANG Meiling, SHI Jinke, CHEN Xiangting, WEI Yanli, HUANG Lijie, ZHAO Hui, DUAN Qingshan. Preparation and Color Properties of Rapid-curing UV Filling Adhesives[J]. Packaging Engineering. 2026, 47(13): 156-162 https://doi.org/10.19554/j.cnki.1001-3563.2026.13.018

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