Vacuum Bags High Quality Disposable Food Grade Foil Heat Seal Print Plastic Storage Freezer Packaging Pouch

Vacuum bag advantages:
1. Extend shelf life: significantly slow down the oxidation process and microbial growth of food.
2. Keeps food fresh: helps to maintain the freshness, colour, taste and nutrients of food.
3. Reduce the use of preservatives
4. Facilitates storage and transport: Reduces the volume of food, facilitates storage and transport, and also reduces losses during transport.
5. Versatility: can be used in combination with other packaging technologies, such as adding a drawer zip, adding an easy-tear opening, etc., to provide more versatility.

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The choice of material for vacuum bags depends mainly on the characteristics of the packaged products and packaging requirements. The following are some common vacuum bag materials:

1. polyethylene (PE): low-density polyethylene (LDPE) and high-density polyethylene (HDPE), with good flexibility and sealing, suitable for general food vacuum packaging.

2. polypropylene (PP): high strength and heat resistance, suitable for food or non-food products that require more robust packaging.

3. polyethylene terephthalate (PET): with high strength and transparency, commonly used in vacuum packaging that requires high transparency and strength requirements.

4. nylon (PA): has good mechanical properties and barrier properties, suitable for vacuum packaging requiring high barrier properties.

5. polyvinylidene dichloride (PVDC): excellent barrier properties, suitable for products with very high requirements for oxygen and water vapour barrier.

6. multilayer composites: these are usually made by laminating two or more layers of film of different materials to combine the advantages of different materials. Example:

- PE/PA/PE: combines the flexibility of PE with the strength and barrier properties of PA.

- PE/PET/PE: Combines the sealing properties of PE with the strength and transparency of PET.

- PA/EVOH/PA: combines the strength of PA with the excellent barrier properties of EVOH.

7. Ethylene vinyl acetate copolymer (EVA): has good flexibility and sealing properties, and can be used for products that require a certain level of barrier properties.

8. biodegradable materials: such as polylactic acid (PLA), suitable for products requiring environmentally friendly packaging.