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Nowadays painting industry has become a home industry throughout the country. Important parameters in painting process are baking time and temperature. The baking process <br /> <br /> <br /> <br /> <br /> is needed to increase painting process productivity in ter...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/14632 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Nowadays painting industry has become a home industry throughout the country. Important parameters in painting process are baking time and temperature. The baking process <br />
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is needed to increase painting process productivity in term of short drying time and increasing mechanical properties required. However commercial paint manufacturer seldom provide a comprehensive guide and data for optimum baking process accompanying the paint product itself. <br />
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The observation is carried out to find the optimum baking time and temperature for a certain unit area. Commercial base coat paint used for the experiment was Lesonal Basecoat SB 120 MM. This basecoat paint consist of 3 components that are; binder, solvent and pigment. The <br />
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mechanical property is determined by type of binder. Several steel plate specimens with the size of 2 by 5 cm2 were prepared and painted. The type technology employed is the HVLP (high volume low pressure) spraying process with 2 bars of pressure. Baking temperature of 900C, 1000C, 1100C, 1200C and baking time of 5, 10 and 15 minutes were used for the experiment. To obtain optimum basecoat paint hardness a 1 minute interval between processes were undertaken while optimum temperature is optimized. A pencil scratch hardness test a method based on ASTMD 3363 was used to measure the coating hardness quality. FTIR was used to characterize <br />
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the type of chemical compound of the paint used. The basecoat thickness was measured by using the Elcometer 456 coating thickness gauge. <br />
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From the observation it is found that optimum baking temperature were of 1200C and time of 3 minutes and this gave a scratch hardness value of 3H. Optimization was indicated by the amount of power required to achieve the optimum mechanical property on a painted unit area. Hence optimized baking is achieved at temperature of 1200C and power of 5 Wh/cm2. |
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