Food aluminum foil bag structure
According to the conventional structure, aluminum foil vacuum bags are usually distinguished by outer layer, middle layer, inner layer, adhesive layer, etc.
The outer layer material is usually selected with good mechanical strength, heat resistance and good printing performance. Materials with good optical properties.
The middle layer material is usually used to enhance certain properties of the composite structure, such as barrier properties, light-shielding properties, fragrance retention, strength and other materials.
The most critical function of the inner layer material is sealing. The inner layer structure is in direct contact with the contents, so it must be non-toxic, odorless, water-resistant, and oil-resistant.
Features of food aluminum foil bags
1. PA is a very strong and tough film with good tensile strength, elongation, tear strength and wear resistance.
2. Excellent needle punch resistance and good printability.
3. It has excellent low-temperature characteristics and has a wide operating temperature range, from -60-200°C.
4. Excellent oil resistance, organic solvent resistance, chemical resistance and alkali resistance.
5. It has high moisture absorption and moisture permeability, and has poor dimensional stability after moisture absorption.
6. Poor stiffness, easy to wrinkle, easy to accumulate static electricity, and poor heat sealability.
Food aluminum foil bag application
Mainly used as the surface layer and middle layer of composite films, and can be used to make oil-containing product packaging, freezing packaging, vacuum packaging, cooking and sterilization packaging, etc.
