When choosing the right material for customized supermarket plastic bags, you should consider its durability, environmental friendliness and cost. Common materials include polyethylene (PE), polypropylene (PP) and so on. Size selection should be based on the size of the goods, weight and ease of carrying customers to determine, the general size of the medium size bag is about 30cm × 40cm, can bear a weight of about 5 kg, suitable for most shopping scenarios.
First, the choice of materials
When customizing supermarket plastic bags, the choice of material is crucial. It directly affects the durability, environmental protection and cost of plastic bags. Currently, the common plastic bag materials on the market are mainly polyethylene (PE) and polypropylene (PP).

Polyethylene material has good flexibility and durability, and is suitable for making plastic bags of various sizes. In addition, polyethylene plastic bags can also maintain good toughness at low temperatures and are not easy to break. However, the environmental friendliness of polyethylene plastic bags is relatively poor, not easy to degrade, and easy to cause environmental pollution. Therefore, when choosing polyethylene materials, its environmental performance should be fully considered, and try to choose recyclable or easily degradable products.

Polypropylene materials, on the other hand, has a high degree of hardness and transparency, the production of plastic bags have a beautiful appearance, and has a good load-bearing capacity. The environmental performance of polypropylene plastic bags is also relatively good, part of the product can realize the degradation. However, the price of polypropylene materials is relatively high, which will increase the cost of customization. Therefore, in the choice of polypropylene materials, should be considered comprehensively its performance and cost factors.

Second, size selection
Size is another important factor to consider when customizing supermarket plastic bags. The right size not only ensures the weight-bearing capacity of the plastic bag, but also improves the customer's experience.

When choosing the size, it should be determined according to the type and size of goods sold in the supermarket. Generally speaking, the size of medium-sized plastic bags is about 30cm × 40cm, which can bear about 5 kilograms and is suitable for most shopping scenarios. For large commodities or bulk purchases, larger size plastic bags can be selected to ensure weight bearing and carrying convenience. At the same time, in order to meet the needs of different customers, supermarkets can also provide a variety of sizes of plastic bags for customers to choose.

In short, when customizing supermarket plastic bags, the two factors of material and size should be considered comprehensively in order to choose a product that is both practical and environmentally friendly. Through a reasonable choice, not only can improve the service life and load-bearing capacity of the plastic bags, but also for the supermarket to establish a good environmental image, to attract more consumer attention.