Although it feels dry to the touch, the solvent smell doesn't go away. I will explain the management points to detect internal moisture that hasn't dried.
The surface is dry, but the smell of thinner remains. The inside of the paint film is still not dry. ────────────── ■ Cause of Occurrence Residual solvent occurs when only the surface dries first, forming a film while the solvent inside is trapped. The thicker the film and the higher the initial drying temperature, the more likely this occurs. ■ Truth A paint film that retains odor lacks hardness and adhesion. Rapidly increasing the temperature without allowing for a set time leads to surface hardening occurring first. ■ Improvement Measures After painting, ensure a set time of 5 to 10 minutes at room temperature. Drying should be done by gradually increasing the temperature from a low temperature, and keep the thickness of a single layer below 30 microns. Please utilize the management materials for set time and temperature increase conditions.
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basic information
Set time: 5 to 10 minutes at room temperature / Heating method: stepwise heating / Film thickness per application: 30 microns or less / Compatible coatings: solvent-based and powder coatings
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Parts for food machinery and kitchen equipment / housings for medical devices / products used in sealed environments
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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.
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