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How to Address Defects in UV 3C Coatings (Part 8)
In the practical production of UV‑3C coatings, over‑curing represents another manifestation of coating‑curing defects. It is characterized by increased brittleness, yellowing, and reduced adhesion, all of which adversely affect the coating’s performance and service life. UV‑curable coatings rely on ultraviolet light to initiate polymerization reactions that form a crosslinked network; however, when the UV energy is excessively intense or the irradiation time is too long, the already formed polymer network may undergo excessive crosslinking or even degradation, leading to a deterioration in coating properties. To address this issue, appropriate measures must be taken, including controlling curing energy, optimizing irradiation time, and adjusting the formulation. This paper outlines methods for mitigating over‑curing defects, focusing on managing energy intensity, regulating curing time, and addressing yellowing.
2026-07-02
How to Address Defects in UV 3C Coatings (Part 7)
In the actual production of UV 3C coatings, insufficient curing is one of the key defects that compromise coating performance. It manifests as a sticky surface, inadequate hardness, and poor adhesion after curing, directly undermining the coating’s protective function and the product’s reliability. Curing is the critical step that distinguishes UV coatings from conventional ones; insufficient curing indicates that the crosslinking reaction has not proceeded to completion. To address this issue, appropriate measures must be implemented across multiple aspects, including maintenance of curing equipment, adjustment of process parameters, and optimization of coating formulation. This paper outlines strategies for mitigating insufficient curing, focusing on UV lamp management, irradiation time optimization, stable energy output, and coating compatibility.
2026-07-02
How to Address Defects in UV 3C Coatings (Part 6)
In the practical production of UV 3C coatings, edge retraction is one of the most common surface defects encountered during the coating process. It manifests as a shrinkage of the coating at the substrate edges or in specific areas, resulting in reduced coating thickness at the edges and even exposure of the substrate. This significantly compromises the edge‑protection performance and the overall aesthetic quality of the coating. Given the stringent requirements of 3C products for coating integrity and edge‑protection performance, addressing edge retraction necessitates a comprehensive approach that integrates coating formulation, substrate preparation, and coating application processes. This paper outlines strategies for mitigating edge retraction by focusing on controlling coating shrinkage, improving the condition of substrate edges, and optimizing coating application techniques.
2026-07-02
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Bossin cordially invites you to visit the 2025 China International Coatings Exhibition.
UV monomer with a curing speed more than 30% faster than that of trifunctional monomers
Low-irritation version of HDDA
A high-refractive-index UV monomer
Although it’s quite ordinary, it offers great value for the price.
A UV monomer used in fields such as PCB ink, UV curing agents, and offset printing ink.
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