2020
DOI: 10.31648/ts.6119
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Analysis of the influence of UV light exposure time on hardness and density properties of SLA models

Abstract: The article analysis the effect of exposure to ultraviolet light on the hardening process of the model made in the SLA technology. Research samples were created with the SLA additive technique using a 10s exposure time. In this experiment, the change in item hardness and density over a 96-hour period was analysed. Light exposure time for details of an item made in SLA technology results in an increase in hardness. At the same time are observed, changes in density and stabilization of both parameters with incre… Show more

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Cited by 6 publications
(5 citation statements)
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“…It should be noted that samples printed in black resin had similar mechanical parameters to those fabricated with transparent resin. UV curing time impacts the mechanical properties of the samples made of the resin used in this study, in agreement with the findings of (2,13,14). Furthermore, our results show that the curing time should be optimised for various fabrication methods and considering the elements' physical dimensions.…”
Section: Discussionsupporting
confidence: 89%
“…It should be noted that samples printed in black resin had similar mechanical parameters to those fabricated with transparent resin. UV curing time impacts the mechanical properties of the samples made of the resin used in this study, in agreement with the findings of (2,13,14). Furthermore, our results show that the curing time should be optimised for various fabrication methods and considering the elements' physical dimensions.…”
Section: Discussionsupporting
confidence: 89%
“…These tensile test results are in line with research conducted by Riccio et al [ 39 ], where the post-curing process increases the resistance of the specimen to tensile loads. An increasing in the tensile strength of 3D-printed nasopharyngeal is due to the continuous crosslinking of photopolymer resin under irradiation of UV light [ 40 ]. The polymerization degree of crosslinked polymer systems has a vital role in the mechanical properties of materials [ 41 ].…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, the one-way ANOVA results (with α = 0.05) of LT 0.075 mm and LT 0.1 mm showed F -value (27.56) and (115.31), respectively were also far higher than F -crit value (3.88). UV light exposure in the post-curing treatment causes continuous crosslinking on the polymer structure [ 40 ]. Thus, it will cause the flexural strength of the printed part to increase.…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, it must undergo a post‐printing treatment process where any additional and uncured resin is removed by washing with solvents (usually isopropyl alcohol), followed by post‐curing, where it is placed underexposure to a natural or an artificial UV source for an extended time period (24–60 h). [ 52 ] Post‐curing results in more enhanced mechanical strength.…”
Section: Working Principles Of Sla and Dlpmentioning
confidence: 99%