Aluminum foil bags have high requirements to their surface quality

With the improvement of the material living standards of contemporary society,people are paying more and more attention to the issue of food safety.Today we will analyze the aluminum foil food packaging bag and see what are the requirements for the surface quality of the aluminum foil food packaging bag?

1. The surface should be clean and flat,no corrosion marks and bumps are allowed,no serious wrinkles and folds are allowed,its texture is soft,the folding should not be easy to break,and the flexibility should be better.Store it in a dry place,don’t leave it for too long,and use it as soon as possible.
2. The surface cleanliness of the aluminum foil should be high,no obvious yellow oil spots formed after the lubricating oil is burned,no oil odor,and reach A or B level after the water brush test.The  surface tension of the bag should be high,which should be above 72Mn/m in accordance with the requirements of the national standard.A simple method is to use distilled water to test.The surface of the aluminum foil should be covered with distilled water.If the surface of the aluminum foil is greasy,it will affect the firmness of the composite between the aluminum foil and other materials,especially the packaging bag after high-temperature cooking. The phenomenon of peeling.
3. Oil stains and pinholes are the main inspection indicators of the product. Aluminum foil materials have high requirements for the physical, mechanical and chemical properties of the aluminum foil. The number of pinholes in the aluminum foil should be small. No matter how thick the aluminum foil is, the pinhole diameter should not be greater than 20um.