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Why does the peel strength decrease after the aluminum foil composite bag is loaded with acidic food?

Why does the peel strength decrease after the aluminum foil composite bag is loaded with acidic food? This is because there are low molecular weight organic acids such as lactic acid, acetic acid, and vitamin C (ie ascorbic acid) in acidic foods. These acids will slowly penetrate through the polyethylene or polypropylene film of the inner layer and migrate to the interlayer, and the aluminum foil with the best barrier properties is attached to the inner layer. These organic acids can no longer migrate out through the aluminum foil and accumulate between the aluminum foil and the inner film or adhesive film. It happens that aluminum is an active metal, and it is easy to chemically react with organic acids to form low-molecular-weight organic acid aluminum salts, resulting in a decrease in the peel strength between the inner layer material and the aluminum foil. More knowledge of aluminum foil packaging bags: www.yltpacking.com Customized packaging bags

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