Eighty percent of poor hardening is due to insufficient baking temperature. An explanation of the measured value that hardness decreases by 20 percent with a 10-degree difference.
Poor curing refers to a state where the coating film does not cure sufficiently, resulting in a dent when pressed with a finger. It can crack in a pattern resembling a spider web or peel off due to friction, significantly reducing durability. It accounts for 10-15 percent of all defects on average in the industry. Precision in curing temperature: Raising the curing temperature from 150 degrees to 160 degrees improves hardness (pencil hardness) from H to 2H. Furthermore, increasing it to 170 degrees to 180 degrees can achieve up to 3H. However, a management precision of plus or minus 10 degrees is essential. Measured data on curing time: At 180 degrees, a curing time of 20 minutes reaches a hardness of 2H, 30 minutes reaches 3H, and 60 minutes reaches 4H. The required curing time varies depending on the size and thickness of the parts. Differences in conditions based on resin type: Alkyd resin is sufficient at 160 degrees, but melamine resin requires 180 degrees. Polyester resin is recommended at 190 degrees. Understanding the chemical properties of the resin is essential for setting conditions. Our company has established a curing condition matrix based on part size, material, and resin type, ensuring a stable supply of hardness above 4H. We can also guarantee wear resistance.
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basic information
Baking temperature control, baking time, resin type conditions, hardness management.
Price range
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Applications/Examples of results
Prevention of poor hardening, improvement of durability
Company information
We are not just a "subcontracted painting factory." Established in 1958, our company has a foundation of painting technology and also specializes in chemical treatment, stripping, and cleaning, functioning as the "external surface treatment department" in your organizational chart. Based on our philosophy of "preparation is eight-tenths of the work," we emphasize participation from the "upstream process" before the drawings are finalized. We conduct test painting on a wide range of metals and difficult materials, and we produce the entire process from assembly, packaging, to delivery, thereby reducing your management workload. Additionally, by being able to perform zinc phosphate treatment in-house, we achieve stable painting quality. Furthermore, our micro-heating stripping technology, which does not use chemicals, maintains the electrical state of the "jigs (hangers)" that influence painting quality. Our approach of "pre-treatment determines painting quality" ensures the stability of the paint film during mass production. Rather than simply "applying specified standards," we work backwards to achieve optimal painting specifications and prevent scratches during transportation, sparing no effort in thorough discussions from the outset. This diligent preparation is the shortest path to preventing rework and minimizing total costs. From the development stage, please utilize the expertise of our specialists as part of your production line.
