2026-03-26
In the production of premium home appliances, such as built-in large-capacity refrigerators, the flatness of sheet metal is a critical quality indicator. Conventional thermosetting powder coatings typically require curing temperatures of $200^circtext{C}$ or higher.
For ultra-thin cold-rolled steel or aluminum sheets (thickness $0.5text{mm}$ to $0.8text{mm}$), sustained high-temperature baking often triggers the release of internal stresses, leading to Thermal Deformation. This distortion compromises assembly sealing and can cause micro-cracks in the coating film.
The core of low-cure technology (curing at $160^circtext{C}$) lies in the synergy between high-activity catalysts and low-viscosity polyester resins. By reducing the curing temperature from $200^circtext{C}$ to $160^circtext{C}$, the thermal gradient experienced by the metal substrate is reduced by approximately $20%$. For a $1.2text{m}$ refrigerator side panel, this significantly minimizes edge warping.
Empirical data confirms that at $160^circtext{C}$ for $15$ minutes, the cross-linking conversion rate exceeds $95%$. According to GB/T 6739 (Pencil Hardness), the film maintains a stable hardness of over $2H$. Furthermore, ISO 2409 adhesion tests consistently return a Grade 0 result. This ensures that environmental benefits do not come at the cost of mechanical durability or aesthetic consistency ($Delta E < 0.3$).
Adres
Nie, nie, nie.38Huagang Road, południowy obszar nowoczesnego portu przemysłowego, Pixian, Chengdu, Sichuan, Chiny
Teren
86-18190826106
Wiadomość elektroniczna
esu.sales7@hsindapowdercoating.com
