As an efficient and environmentally friendly packaging material, shrink film plays an important role in global trade. Its unique structural design enables it to fit closely to the product, provide excellent protection, and reduce the risk of damage during transportation. This article will analyze the shrink film in detail from the aspects of structural characteristics, material types and foreign trade applications.
Structural characteristics of shrink film
The core structure of the shrink film is composed of multiple layers of polymer materials, usually including an outer layer, an intermediate layer and an inner layer. The outer layer material usually has high wear resistance and tear resistance to ensure that it is not easily damaged during transportation and handling. The middle layer plays a role in enhancing the shrinkage performance, usually using materials such as linear low-density polyethylene (LLDPE) or polypropylene (PP), which can shrink evenly after heating. The inner layer is in direct contact with the product and requires good flexibility and fit to ensure that the packaging is tight and not easy to fall off.
This multi-layer structural design allows the shrink film to be evenly stressed during the shrinkage process, avoiding local deformation or cracking, thereby providing a more stable packaging effect. In addition, the air permeability and moisture resistance of shrink film also vary due to its structure, and can be adjusted according to the needs of different products.
Types of shrink film materials
Common shrink film materials on the market currently include three categories: PVC (polyvinyl chloride), PET (polyethylene terephthalate) and PE (polyethylene). PVC shrink film has been widely used in packaging in food, beverage and other industries due to its low cost and high shrinkage rate. However, due to environmental issues, the use of PVC has gradually been restricted.
PET shrink film has become an ideal choice to replace PVC due to its high transparency, high strength and environmental protection characteristics, especially for foreign trade packaging of high-end products. PE shrink film occupies an important position in the fields of daily necessities, electronic products, etc. due to its flexibility and low cost advantages.
Application in foreign trade packaging
In global trade, shrink film has become the preferred packaging material for many export products due to its lightness, moisture resistance and shock resistance. Whether it is electronic products, food or daily necessities, shrink film can provide reliable protection while reducing transportation volume and logistics costs. In addition, the printability of shrink film also makes it an important carrier for brand promotion, helping foreign trade companies to enhance their product image.
With the improvement of environmental protection requirements, the research and development and application of degradable shrink film has also become an industry trend. In the future, shrink film will continue to play an important role in the global packaging market, providing foreign trade companies with more efficient and sustainable packaging solutions.
