1. Polyethylene (PE): PE material has good flexibility and drop resistance, which can effectively prevent nuts from being damaged during transportation. At the same time, it also has excellent sealing performance, which can extend the shelf life of the product.

However, the air permeability of PE bags is relatively poor. For dried fruit products that need to breathe, it may be necessary to use them in combination with air permeability design.

2. Polypropylene (PP): PP material is harder and more transparent than PE, and is suitable for packaging that needs to display the appearance of the product. It is also more heat-resistant and suitable for occasions that require heat sealing or microwave heating. However, the cost of PP is slightly higher than PE, and in some cases, its drop resistance may not be as good as PE.

3. Polyester (PET): PET material is known for its high transparency, excellent mechanical properties and chemical corrosion resistance. It can clearly display the color and texture of nuts and dried fruits, while blocking oxygen and moisture, extending the shelf life of the product. However, the cost of PET is relatively high, and the environmental requirements for recycling are more stringent.

4. Aluminum foil composite film: This material combines the excellent barrier properties of aluminum foil with the flexibility and processability of plastics. It can isolate light, oxygen and moisture, and maintain the freshness and taste of nuts. The printing effect of aluminum foil composite bags is exquisite, which can significantly improve the grade and attractiveness of products. However, its cost is high, and recycling is relatively complicated.

5. Aluminum-coated composite film: This material has the characteristics of both plastic film and metal, and has good light-shielding and barrier effects. Compared with pure aluminum foil bags, aluminized bags have weaker light-shielding and barrier properties, but the price is lower, which is a cost-effective choice.