The function of PVC shrink film is to be transparent, moisture-proof, dust-proof, damage-proof, maintenance-friendly and aesthetically pleasing. 

The raw materials are prone to shrinkage, and the temperature requirements for the shrinking process are not high. They can start to shrink at 40℃, but their strength is greatly affected by the external temperature. In low-temperature environments, their flexibility is poor. They can be widely used in the outer packaging or collective packaging of products such as doors and windows, profiles, stainless steel pipes, electrical appliances, books, and handicrafts. 

PVC shrink film is a kind of excellent film packaging material, and it has the following advantages: 

(1) Excellent anti-theft and dust-proof performance; 

(2) The heat-shrink packaging bag can be used to package various items, preventing the loss of individual small items and making it convenient for customers to carry. 

(3) The high level of transparency enables customers to directly view the packaged goods, facilitating their selection of products. 

(4) It closely matches the shape of the product and is suitable for packaging of various shapes of goods. The range of packaging contents is extensive. 

(5) By selecting different resins and formulations, it is possible to produce heat-shrinkable films with various mechanical strengths and functions. These films can be used not only for inner packaging of low-strength and lightweight products, but also for transportation packaging (outer packaging) of mechanical products and construction materials for containers with high strength requirements.