Choosing the appropriate thickness of stretch film requires comprehensive consideration of multiple factors. Firstly, the weight and size of the packaged items. For lighter and smaller items such as daily necessities and small electronic products, thinner stretch films can be chosen. Generally, a thickness of 12-15 microns can meet basic packaging needs, ensuring certain stretching and wrapping performance while reducing packaging costs. For heavier items such as building materials and industrial components, in order to ensure that the stretch film can withstand the weight of the item and prevent breakage during handling and transportation, a stretch film with a thickness of 20-30 microns or even thicker should be selected. Thicker films have higher tensile strength and tear resistance, which can better fix and protect the item.

Secondly, consider the degree of stretching and usage environment during the packaging process. If it is necessary to stretch the stretch film significantly during the packaging process to achieve better wrapping effect, then a film with moderate thickness and good stretching performance should be selected. Thin films are prone to breakage when stretched excessively, while thick films are not easy to stretch. At the same time, environmental factors are also crucial. In high-temperature environments, stretch films will become softer and their strength will decrease. In this case, a slightly thicker film should be selected appropriately to ensure the stability of the packaging; In low-temperature environments, the flexibility of stretch films deteriorates, and thin films are prone to brittle cracking. It is also necessary to choose relatively thick stretch films with good low-temperature resistance.

In addition, packaging costs and environmental requirements should also be considered. Thicker stretch films are relatively expensive and can increase packaging costs. Therefore, while meeting packaging needs, thinner films should be chosen as much as possible to reduce costs. For some companies with high environmental requirements, biodegradable stretch films can be chosen. Although the cost of such films may be slightly higher, they are in line with the concept of sustainable development. In short, choosing the appropriate thickness of stretch film requires a comprehensive consideration of various factors such as product characteristics, usage environment, and cost.