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As a buyer, you need to know:1.The aluminum coil is the "skeleton" of the painted aluminum coil.
Its quality determines the final product’s performance and lifespan.
Essence: A continuous rolled aluminum material.It is made from aluminum ingots through hot or cold rolling.
Standard Aluminum Coil: Made from ≥99% pure primary aluminum.
Stable composition.
Reliable performance.
Recycled Aluminum Coil: Uses scrap aluminum.
Lower cost. But high risk of impurities.
Leads to uneven strength and corrosion.
Risk Avoidance: For high-quality projects (like curtain walls or appliances).
Always specify primary aluminum.
Request material certification.
The alloy defines the coil’s core properties.
Choosing the wrong alloy is a critical mistake.
| Alloy Series | Key Features | Typical Uses | Buyer’s Advice |
| 1xxx (e.g., 1100) | High purity. Good corrosion resistance. Low strength. | Appliance liners, simple signs. | Low cost. Not for structural or bending parts. |
| 3xxx (e.g., 3003) | Aluminum-manganese alloy. Excellent rust resistance. Good formability. | Building roofs/walls, panels. | Most common in construction. Balanced performance. |
| 5xxx (e.g., 5052) | Aluminum-magnesium alloy. High strength. Resists seawater corrosion. | Ships, vehicles, deep-drawn parts. | Ideal for frequent bending or salty environments. |
This affects internal quality and cost.
Process: Heated above recrystallization temperature.
Traits: Tough. Good for deep drawing. Less precise surface.
Use: Great for deep-stamped products (pots, lamp covers).
Process: Rolled at room temperature.
Traits: Smooth surface. High precision. Harder. Less flexible.
Use: Perfect for high-surface demands (curtain walls, appliance panels).
Need deep drawing? → Choose hot rolled.
Need a perfect surface? → Choose cold rolled.
The coating is the "clothing" for the coil.
It must be durable and beautiful.
Polyester (PE): Cost-effective. Good weather resistance.
Suitable for most buildings and appliances.
PVDF: Super durability. Resists UV. Lasts over 20 years.
A must for high-rise buildings or harsh climates.
Don’t use PE instead of PVDF to save money in high-end projects.
Many later problems start with the base coil.
| Later Issue | Possible Base Cause | How to Avoid It |
| Coating peeling | Dirty base surface. Poor pre-treatment. | Check pre-treatment line. Ask for adhesion test reports. |
| Panel warping | Uneven thickness. Poor annealing. | Specify tight thickness tolerance (±0.02mm). Ask about annealing. |
| Surface defects | Scratches or dents on the base coil. | Inspect base coil before ordering. |
| Early corrosion | Recycled aluminum. Wrong alloy choice. | Use primary aluminum. Choose the right alloy. |
A clear path for your decision:
1.Define the end use: Curtain wall? Appliance? Deep-drawn part?
2.Identify key needs: Strength? Corrosion resistance? Formability?
3.Choose the alloy:
Building envelope → 3003
Marine/vehicle/deep-draw → 5052
Interior signs → 1100
4.Pick the process:
Perfect surface → Cold rolled
Deep forming → Hot rolled
5.Select the coating:
Normal use → PE
Harsh environment → PVDF
6.Finalize specs: Thickness, width, coating thickness. Put them in the contract.
7.Verify supplier: Ask for material certs and test reports. Visit the factory if possible.
OUR ADVANTAGES
Smoothness
There is no residual stress on the surface and no deformation after shearing
Weather resistance
The paint pattern made by roller coating and high temperature baking has high gloss, good color stability and little color difference change
Decorative
There is a fresh natural beauty, the pattern is casual and do, give customers a wide range of personality choices, can enrich the culture of the product, give people more beautiful enjoyment.
Environmental Protection
Resistant to salt, alkali and acid rain corrosion, will not corrode or produce toxic bacteria, does not release any toxic gases.
Mechanical
ACP after composite with plastic and adhesive. With the flexural and flexural strength required by the decorative plate, in the four seasons climate, the change of wind pressure, temperature, humidity and other factors will not cause bending, deformation,expansion and so on.
