A viscosity-mediated model for relating gloss and film thickness of coatings

Uribe-Padilla, Julio; Graells, Moisès; Salgado-Valle, Juan; Serrano, Julia López

doi:10.1016/j.porgcoat.2019.06.041

Cited by 6 publications

(5 citation statements)

References 51 publications

(32 reference statements)

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“…The radial position of the hydraulic jump beginning (r') is supposed to depend on the rotation speed (ω); the volumetric flow rate (Q); and the material properties of density (ρ), viscosity (υ), and surface tension (σ). The following equation was acquired by non-dimensional analysis [18]…”

Section: Resultsmentioning

confidence: 99%

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Hydrodynamic Analysis of the Thickness Variation in a Solid Film Formed by a Spin Coating Process

Park

2022

Coatings

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The surface profile of the film formed by spin coating is experimentally investigated in this paper. The unavoidable wavy form at the surface was observed when the ultraviolet curable resin was used. In addition, the surface thickness variation was directly related to the viscosity, disk rotation speed, and disk size. Fluid dynamic theory with non-dimensional analysis was conducted to describe the surface profile after the spin coating process. It was found that the film had been thickened until the viscosity force and Coriolis force were balanced. The Coriolis force, however, also affected the flow instability during the spinning of the disk. The film thickness variation is successfully described by using the non-dimensional factors. In addition, the edge bump which is induced by hydraulic jump is expressed by the relation of power law of Ekman, Weber, and Reynolds numbers. In this paper, the thickness variation and edge bump position are expressed by using hydrodynamic theory. It is also reveals that the Coriolis force acts based on the magnitude of thickness variation, and the surface tension affects the edge bump position. The presented relationships will contribute further understanding of the spin coating process. The outcome of this paper supports the cost-effective productions of electronic microcircuits and solar cells.

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Section: Resultsmentioning

confidence: 99%

“…Nonetheless, there is not sufficient information or theoretical understanding to describe the thickness non-uniformity and edge bump positions on such a film. The practical predictive models have been required to support decision-making procedures and enhance future produce and process design [18].…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic Analysis of the Thickness Variation in a Solid Film Formed by a Spin Coating Process

Park

2022

Coatings

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“…It is plausible that the function as a light reflection inhibitor deteriorated because we confirmed that the black chrome plating was peeled off and that the SUS was exposed by cleaning. The coating material with the lowest glossiness indicated approximately 0 to 30 [ 34 ]. On the other hand, the glossiness of the DLC/SUS sample before and after sliding was 15.8 and 15.4, respectively.…”

Section: Resultsmentioning

confidence: 99%

Surface Reformation of Medical Devices with DLC Coating

Kaneko

Hiratsuka²,

Alanazi

et al. 2021

Materials

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We evaluated the adhesion, friction characteristics, durability against bodily acids, sterilization, cleaning, and anti-reflection performance of diamond-like carbon (DLC) coatings formed as a surface treatment of intracorporeal medical devices. The major coefficients of friction during intubation in a living body in all environments were lower with DLC coatings than with black chrome plating. DLC demonstrated an adhesion of approximately 24 N, which is eight times stronger than that of black chrome plating. DLC-coated samples also showed significant stability without being damaged during acid immersion and high-pressure steam sterilization, as suggested by the results of durability tests. In addition, the coatings remained unpeeled in a usage environment, and there was no change in the anti-reflection performance of the DLC coatings. In summary, DLC coatings are useful for improving intracorporeal device surfaces and extending the lives of medical devices.

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“…Gloss is a widely used indicator in the printing industry, as it determines whether the printing process will render sufficiently vivid colors. For bright colors and glossiness, substrate materials must be sufficiently smooth [20]. A rough substrate surface will not readily show a glossy print, even if it is very flat.…”

Section: Effect Of Mdf Surface Properties On the Glossiness Of Inkjet...mentioning

confidence: 99%

Effects of MDF Substrate Surface Coating Process on UV Inkjet Print Quality

2023

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The structural properties and whiteness of the substrate surface markedly effect printing quality and are closely related to the primer coating processes. Herein, four different roller coating schemes were applied on MDF surfaces to change their structural properties and color, and the whiteness, gloss, and roughness properties of the substrate surfaces were characterized for UV inkjet printing. Data analysis was conducted to explore the effects of these variables on the color reproduction, relative contrast, and printing gloss of the MDF substrates. The results showed that, according to CMYK, L*a*b* values and spectral reflectance data, the finishing of the MDF substrate with a 40 g/m2 layer of transparent primer combined with three layers of white primer at 20 g/m2 per roll coating layer had the best color reproduction effect for UV inkjet printing. Regarding the effects of relative contrast, the correlation with whiteness and glossiness was significant, while the correlation with glossiness was minor. The inkjet printing gloss value was positively correlated with substrate primer surface whiteness, while it was negatively correlated with roughness. When the surface whiteness of the substrate was relatively high, the roughness was lower and the printing effects were glossier. We sought to optimize the printing effects of all aspects of the MDF substrate by primer coating. The results of this work provide a feasible application method to improve printing quality and enhance the added value of low-quality boards, as well as to further expand the application of UV inkjet printing in the wood decoration market.

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A viscosity-mediated model for relating gloss and film thickness of coatings

Cited by 6 publications

References 51 publications

Hydrodynamic Analysis of the Thickness Variation in a Solid Film Formed by a Spin Coating Process

Hydrodynamic Analysis of the Thickness Variation in a Solid Film Formed by a Spin Coating Process

Surface Reformation of Medical Devices with DLC Coating

Effects of MDF Substrate Surface Coating Process on UV Inkjet Print Quality

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