Methods for identifying raw materials of aluminum foil packaging

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2024-09-19 15:46

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Usually, plastic composite flexible packaging made of aluminum foil and aluminized film is called aluminum foil packaging, which is often difficult to distinguish. Here are 6 methods for identifying aluminum foil and aluminized film: viewing, feeling, folding, twisting, scraping with a knife, and burning.
1. Viewing: The brightness of aluminum foil is not as bright as that of aluminized film, that is, the brightness of aluminum foil packaging is not as high as that of aluminized film packaging. Aluminum foil has strong light-shielding properties, while aluminized film has poor light-shielding properties and can transmit strong light. Because the brightness of aluminized film is bright, the reflectivity of aluminum foil is not as good as that of aluminized film. Aluminum foil packaging is silver-white or silver-gray, while aluminized film packaging is silver-yellow or silver-black.
2. Feel: The feel of aluminum foil packaging is thick, stiff, and heavy, while the feel of aluminized film packaging is lighter and softer than that of aluminum foil packaging.
3. Folding: Aluminum foil packaging is easy to fold into dead folds and dead marks, while aluminized film will not fold into dead folds and dead marks, and will rebound quickly.
4. Twisting: Aluminum foil packaging is not easy to rebound after twisting, and the aluminum layer will be broken; aluminized film packaging will quickly bounce off the kinks after twisting, and there will be no obvious cracks in the aluminum layer.
5. Scraping with a knife: Aluminum foil can be scraped off with a knife, while aluminized film will not scrape off the aluminum layer and will be transparent.
6. Burning: Aluminum foil is not easy to burn with fire and the aluminum layer will roll back, however, he aluminum foil packaging will leave gray aluminum slag after burning; when aluminized film is burned, it can appear different from the burning of plastic film, and there will be no aluminum slag left.

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