Color Coated Aluminum Coil For Venetian Blinds

Haomei Aluminum has focused on producing specialized color coated aluminum coils for venetian blinds for 20 years. Using 3003/3004 aluminum-manganese alloy substrate as its core, combined with PVDF fluorocarbon/high weather-resistant polyester coating, and employing a seven-roll precision rolling + four-coat, three-bake coating process, it provides global venetian blind manufacturers with highly stable raw materials boasting a thickness tolerance of ±0.02mm and a coating adhesion rating of 0. Suitable for outdoor applications in multiple climate zones with cumulative exports exceeding 10,000 tons covering projects in 27 countries.

Haomei Aluminum has established a comprehensive specification matrix for color coated aluminum coils for venetian blinds, covering thicknesses from 0.25-1.2mm and widths from 500-1700mm, with core tolerance control at an industry-leading level. The base material is made of 3003/3004 aluminum-manganese alloy, processed through a continuous casting and cold rolling composite process to ensure a yield strength of 180-220MPa and an elongation of ≥12%, preventing cracking and springback issues during louver blade processing. Width can be customized to customer cutting requirements with a minimum tolerance of ±0.5mm. It comes with standard inner diameter paper cores of 150/405/508mm, compatible with various louver forming equipment. The coating system offers three options: PVDF fluorocarbon (≥25μm), high weather-resistant polyester (≥18μm), and silicone-modified polyester (≥20μm), with adjustable gloss from 10-90° to meet different weather resistance and decorative needs.

In the process of coated aluminum coil for venetian blinds, we employ a seven-rol mill for precise thickness control, coupled with an online plate shape detection system, to control plate flatness error within 3I, resolving issues such as louver blade warping and assembly jamming. Pre-treatment utilizes a dual process of nano-level chromating/chromium-free passivation, forming a 50-80nm conversion film with coating adhesion reaching Grade 0, showing no peeling after 100 cross-cut tests. The coating line is equipped with a German-imported Wagner automatic roller coating system, achieving a coating thickness deviation of ≤±2μm. A four-coat, three-bake process ensures complete coating curing, achieving impact resistance of 50kg·cm without cracking, meeting the mechanical requirements of frequent louver opening and closing. Each roll of product passes a 240-hour neutral salt spray test, with edge corrosion ≤2mm, suitable for harsh environments such as coastal areas and industrial pollution.

Technological advantages and performance breakthroughs of coated aluminum coil for venetian blinds including:

• Stress Relief Technology:

A unique online continuous annealing process controls the internal stress of the aluminum coil below 50MPa, resulting in a springback rate of ≤1% after louver blade forming, significantly improving assembly accuracy and yield.

• Color Stabilization System:

Utilizing a composite formula of inorganic pigments and organic carriers, coupled with online monitoring using a precision colorimeter, ΔE ≤0.8, and color difference change ≤3 after 5 years of outdoor exposure, solving the fading and yellowing problems of traditional products.

• Optimized Processing Adaptability:

Adjusting alloy composition and heat treatment parameters for processes such as bending, punching, and shearing of louvers, ensuring the material maintains both rigidity and excellent machinability, reducing tool wear by 30% and increasing production efficiency by 25%.

• Green Production Certification:

Achieving VOC emissions ≤30mg/m³ throughout the entire process, passing ISO14001 and EU REACH certifications, meeting the environmental requirements of high-end markets such as North America and the EU.

Haomei Aluminum has established a three-tiered testing system from raw materials to production to finished products. Each roll of product comes with a material certificate, coating test report, and salt spray test data, supporting third-party re-inspection. We offer free sample testing and processing technology optimization suggestions, and provide specialized technical services to venetian blind manufacturers, including mold design, bending parameters, and coating repair. Leveraging our five global warehousing centers, we achieve a 48-hour rapid response time to address customers’ urgent replenishment needs.

Choosing Haomei’s specialized color coated aluminum coils for venetian blinds means you gain not only stable raw materials but also technical solutions based on 15 years of production experience, helping your products establish a competitive advantage in the global market.