Milk cover foil structure consists of: polyester / aluminum foil / heat sealing layer (PET / AL / PE·EVA).
Milk cover foil model: 8011 aluminum foil
Alloy status: O
Thickness range: 0.04-0.09mm
Width range: 100-1650mm
Dairy products have complex components and are easily affected by temperature, oxygen, light, microorganisms, mechanical effects, etc., resulting in discoloration, oxidation, damage, and deterioration of the products, thereby shortening the shelf life.
Most of the yogurt cup lid films are made of aluminum foil composite film, mainly to ensure high barrier properties of the seal and to ensure that the straw is easy to puncture. However, if the cover film is too easy to puncture, it will not tolerate the force of external hard objects, resulting in quality problems such as leakage and breakage.
Aluminum foil sealing is a common packaging form for yogurt products and has a large market demand. Milk cover foil is mainly made of 8 series aluminum alloy, such as 8011 aluminum foil and 8079 aluminum foil. It is sealed with aluminum foil and has the characteristics of airtightness, moisture-proof, light-shielding, hygiene, long storage time and easy opening, and is very popular in the market.
Large enterprises now use aluminum foil to seal dairy products, which has the following advantages:
(1) The sealing performance of aluminum foil is better than that of pure plastic. When viewed under a magnifying glass, the plastic material actually has many small holes through which air and water can pass;
(2) The aluminum foil composite film has high strength;
(3) The third is the sealing process. Yogurt generally uses heat sealing. In principle, it is to use a piece of hot iron to iron the sealing film and the bottle mouth, so that the sealing film and the bottle mouth are heated and melted and then stick together. To achieve the sealing effect, aluminum foil is more resistant to high temperatures and has better sealing effect;
