Precautions During the Processing and Use of Aluminum Composite Panels

Aluminu composite panels (ACP), also known as aluminum plastic panels, are widely used in modern architecture, advertising signage, and interior design due to their lightweight structure, excellent surface finish, and strong weather resistance. However, to ensure their long-term performance and aesthetic appeal, it is crucial to follow strict precautions during storage, processing, transportation, installation, and maintenance. Below are the comprehensive precautions and best practices to guarantee the optimal use and durability of aluminum composite panels.

1. Storage of Aluminum Composite Panels

Proper storage is the foundation for maintaining the quality of aluminum composite panels before processing or installation.

• Store panels in a dry, well-ventilated area to prevent moisture absorption and oxidation of the aluminum layer.

• Lay panels flat on a level surface; do not lean them vertically or place heavy objects on top.

• Avoid stepping on or bumping the panels to prevent surface dents and core damage.

• Keep panels away from direct sunlight, rain, and corrosive environments to preserve coating integrity.

2. Transporting Aluminum Composite Panels

During transportation, aluminum-plastic panels are highly susceptible to scratches and deformation.

• Always lift panels from all four corners simultaneously using multiple people or mechanical aids.

• Do not drag, push, or pull the panels across surfaces; friction can cause scratches or edge damage.

• Use protective sheets or foam padding between panels during stacking and transport to avoid rubbing.

• Ensure vehicles are clean, dry, and free from sharp objects that could puncture or damage the panels.

3. Grooving Aluminum Composite Panels

Grooving is a crucial step before folding and bending ACP panels for corners or cladding details.

• Use a groover or grooving machine equipped with a milling cutter featuring a semi-circular head and a blade angle greater than 90°.

• Avoid cutting too deep, as this can damage the aluminum layer or weaken the structure.

• Do not cut too shallow; otherwise, the panel may crack or resist bending.

• Maintain a 0.2–0.3mm plastic core layer with the aluminum sheet during grooving to enhance toughness and prevent breakage.

• Improper grooving can lead to paint film cracking, uneven folds, and reduced structural integrity during bending.

4. Bending Aluminum Composite Panels

Bending must be carried out with precision and consistent pressure to avoid damaging the surface.

• Apply uniform force across the bending area and complete the bend in a single, smooth motion.

• Avoid repeated bending, as this may cause metal fatigue, resulting in cracks or panel breakage.

• Always use professional bending equipment to maintain angle accuracy and prevent stress concentration.

• Ensure that the ambient temperature is moderate during bending—extreme cold can make the panel brittle.

5. Processing Curved Aluminum Composite Panels

When fabricating curved ACP panels, precision and gradual shaping are essential to maintain quality.

• Use specialized bending or rolling machines designed for aluminum composite panels.

• Apply force slowly and evenly, shaping the curve step by step until the desired radius is achieved.

• Never attempt to bend the panel in a single pass, as sudden force can cause cracking or delamination.

• Check the curve consistency after each pass to ensure smoothness and prevent wrinkles or uneven curvature.

6. Managing Panel Batches and Color Consistency

Due to variations in production conditions, panels from different manufacturing batches may exhibit slight color differences.

• Always compare the color of panels before installation, especially if sourced from different batches.

• If color variation is noticeable, use panels from the same batch on the same surface area to maintain uniformity.

• Record and label panel batch numbers during storage to simplify tracking and quality assurance.

Pro Tip: Conduct a color comparison under natural daylight to ensure accurate visual consistency before installation.

7. Installation Direction of Aluminum Composite Panels

Aluminum-plastic panels have a directional coating, meaning that the surface finish may reflect light differently depending on installation orientation.

• When installing multiple panels of the same color on the same façade, ensure that all directional arrows on the protective film point in the same direction.

• Installing panels in different orientations may cause apparent color variation or uneven reflection, even if the panels are from the same batch.

• Always check direction marks before fixing the panels to the subframe.

8. Protective Film Removal

Each aluminum-plastic panel is covered with a protective film to prevent surface scratches during handling. However, this film must be removed properly and on time.

• Remove the protective film within 45 days after installation to avoid difficulty in peeling and adhesive residue transfer.

• If left on for too long, exposure to sunlight and heat can cause the film to bond permanently to the surface.

• Remove the film gently and gradually; avoid scratching the surface with sharp tools.

9. Usage Conditions of Aluminum Composite Panels

Aluminum-plastic panels are divided into interior-grade and exterior-grade types, each designed for specific environments.

• Interior panels should only be used indoors where temperature and humidity are stable.

• Installing interior-grade panels outdoors will accelerate aging, cause delamination, and lead to color fading or surface cracking.

• Exterior panels, made with weather-resistant coatings such as PVDF or fluorocarbon, are designed for outdoor architectural facades and signage applications.

• Always verify the type and coating of the panel before installation to match the environmental requirements.

10. Cleaning and Maintenance of Aluminum Composite Panels

Proper cleaning helps maintain the appearance, gloss, and durability of aluminum-plastic panels.

• If contamination occurs during installation, clean immediately using clean water, mild detergent, or alcohol (98% or higher) depending on the nature of the stain.

• Avoid using acetone, toluene, or other strong chemical solvents, as they can damage the paint coating.

• Use a soft cloth or sponge to gently wipe the surface; do not use abrasive materials like steel wool.

• For exterior panels, perform regular cleaning every 6–12 months to remove dust, dirt, and pollutants that could degrade the coating.

• Always rinse thoroughly with water after cleaning to prevent residue buildup.

Additional Professional Tips for ACP Handling

• Store panels horizontally and indoors to prevent edge deformation.

• Always inspect panels for scratches or defects before cutting or installation.

• Use stainless steel fasteners and compatible subframe systems to prevent galvanic corrosion.

• During installation, allow for thermal expansion gaps to accommodate temperature changes.

• Never use high-speed mechanical saws that generate excessive heat during cutting—this may melt the plastic core.

Conclusion

Proper handling and processing of aluminum composite panels ensure not only a flawless finish but also long-term durability and performance. By following the above precautions during storage, transportation, grooving, bending, installation, and cleaning, you can effectively avoid surface damage, color inconsistencies, and premature aging.

Whether used for building facades, interior decoration, or signage applications, meticulous attention to detail in every stage of handling ensures that aluminum-plastic panels maintain their structural integrity, aesthetic appeal, and longevity for years to come.