1: The vacuum bag is divided into single layer and multi-layer

Ordinary vacuum bags are made of PE single-layer materials. Such bags can be vacuumed, but the damage rate and air leakage rate of vacuuming are relatively high, but the cost is low. Many customers choose single-layer PE bags to save costs. Use a vacuum bag. Good vacuum bags are made of multi-layer composite materials, such as nylon/PE. This is a two-layer composite bag. Such a bag is strong and will not leak air when vacuumed. At present, most food packaging bags are selected Multi-layer composite bags are used as evacuated bags.

2: Material thickness and selection of materials with special properties

Different foods should be packed with vacuum bag materials of different thicknesses and properties. For products that are heavy, choose thick materials, and for products that are light, choose thin materials to save costs. Of course, the thicker the material, the higher the cost, but the stronger it will be. Different foods have different attributes. For example, salt-baked foods are highly oily and should choose oil-resistant materials, kimchi foods with high salt content should choose acid and alkali-resistant materials, and products that require high-temperature sterilization or high-temperature cooking should be selected High temperature resistant material.