1.Judging by its shape. The size of aluminum composite panel should be in order, even in thickness, straight in plate. The plate can’t stand when it’s on its edge, and it shouldn’t be felt too soft when you lift one side of it. Tear off the protect-firm of the product acp panels and observe, the painted surface should be tidy without some surface defect, such as, color difference, spots, scars, uneven luster and painting leak.
2. Judging by its smell. Peel the panel, there are no pungent smell from organic solvent.
3. According to national standard, the thickness of external wall plate should be 4mm, the thickness of aluminum should be 0.5mm, however, the thickness of inner wall plate is 3mm, the thickness of aluminum should be 0.2mm.Obviously, the external aluminum wall plate is harder than the inner one.
Indentify aluminum composite panel through some chemical experiences
1.If it is possible, you can drop some dilute sodium hydroxide solution (2%~5%) on the surface of product and cover it (in order to prevent it from deterioration), the film should have no corrosion several hours later.
2. Use some cotton yarn or soft cloth which has been soaked in butanone which is sold in some chemical shops silicone adhesive sealant to wrap about one hundred times on the surface of film, and the film shouldn’t disappear.
3. Boil the sample for two hours, and observe it after it cooling down. There shouldn’t be chip between the aluminum plate and plastic. Compare the prices
As we all have the concept about the price of aluminum composite panel’s main material, in addition, add some costs of equipment amortization, labor management and the profit of produce, so there will be a limitation on the price. So far, the profit of producing aluminum composite panel is almost at the lowest level, so the lower price is obvious the feature of fake and poor quality products. Of course, only depending on some easy identification to judge the qualification of aluminum-plastic composite panel is not enough. For this, our country has published some national standards, such as the national standard (GB/T17748-1999), customers should go to indentify the overall quality in some quality departments which are authorized by our country.
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