Gloss Level of HDF Finished with Different Numbers of Layers and Hardened with UV Hg-Ga Lamps of Selected Power

Abstract

A key feature of varnish coatings on furniture surfaces is their optical properties, which often determine customers’ purchase choices. Furniture may be produced using various boards, which are much cheaper than wood-based materials. For their finishing, among others, UV-cured varnish products are used. The aim of this study was to determine the effect of different types of HDF boards, the amount of basecoat and topcoat applied, the number of layers, and the different lamp powers used for hardening on the gloss of coatings obtained using UV technology. The gloss was tested with a photoelectric apparatus. An auxiliary parameter in the assessment of the gloss of the coatings was the surface roughness, which was measured with the Mitutoyo SJ-210 Analysis of variance (ANOVA) was used to obtain the results. Statistical considerations showed that the amount of topcoat applied, the power of the lamps, and the interactions between them had the greatest impact on gloss, followed by the number of layers. In general, the gloss of the coating decreased with a decrease in lamp power in the range of 120–60 W/cm and with an increase in the amount of topcoat applied.

Gloss Level, Type of Paper and Colour of HDF Boards Finished with the Energy-Saving Acrylic Paint System

“…The interactions between the spread rates of varnish and the mercury lamp power were Based on these, the author concluded that a thicker coating layer increases the coating resistance. This is consistent with the information provided on quality improvement when more topcoat is applied [54,55]. However, the same principle was not used with the priming varnish.…”

“…In the literature, it is also possible to find publications on the increase in gloss with the application of successive varnish coats [45]. Lower gloss was observed with higher topcoat thickness when finishing using conventional UV lamps [55]. This may be due to differences in the composition of varnishes cured by mercury lamps and LED lamps.…”

UV-curable self-matting waterborne polyurethane acrylate coatingviaself-wrinkled surface during curing in open-air

“…It is attributed to the fact that C 2 and C 3 contain more photoinitiator 819DW than C 1 , as a result, more photoinitiators lead to denser wrinkles 44 and higher matting efficiency. 8,45 The gloss value of F 1 is much lower than those of F 2 and F 3 with the incident angle of 85°. The reason is that the height and spacing of wrinkles in F 1 surface are higher than those in F 2 and F 3 (Fig.…”

Mechanical and Chemical Resistance of UV Coating Systems Prepared under Industrial Conditions

“…The present study is a continuation of a gloss and color study conducted on the same variants [ 41 ]. For this study, 48 variants were selected.…”