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Effect of UV Lamp Distance on Cracking Defects in the UV Coating Process: An Experimental Study

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Abstract:

In the cosmetics packaging industry, UV coating is applied to enhance surface characteristics by providing scratch resistance, a glossy finish, stain resistance, and improved durability against environmental exposure. UV coating is a curing process that utilizes ultraviolet (UV) lamp radiation. This process is influenced by several parameters, including conveyor speed, UV lamp temperature, and the distance between the UV lamp and the product. However, in the current packaging process, these parameters are often set based on routine practices rather than standardized guidelines. As a result, improper UV curing can lead to cracking defects that appear after the product assembly stage. These cracks are caused by suboptimal UV exposure during the curing process, which compromises the mechanical integrity of the product. This paper intends to determine the appropriate standard temperature settings based on a comparative analysis of UV lamp temperatures and distances. Experiments were conducted using four UV lamps with temperature settings of 50°C, 75°C, and 100°C, repeated across five trials. The results show improved mechanical properties and a significant reduction in cracking defects. Furthermore, the findings support the development of more efficient and standardized settings for the UV curing process.

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Periodical:

Solid State Phenomena (Volume 392)

Pages:

33-40

DOI:

https://doi.org/10.4028/p-s2Tqrj

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Online since:

April 2026

Authors:

Raden Bagus Seno Wulung*, Niken Oktavia Prastiwi

Keywords:

Cracking, Plastic Packaging, Temperature UV-Lamp, UV Coating, UV-Lamp Distance

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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