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Talking About the Selection of Shrink Film Materials

Jan. 23, 2021

With the large-scale application of plastic materials in consumer product packaging, more and more packaging bottles are made of rigid plastic bottles. Because of brand promotion and related content introduction, many companies use the bottle labeling process to achieve . However, many companies often fail to label the bottles smoothly during the labeling operation, or they cannot meet the promotion and display effects of the products.

For the labeling operation of the bottle or tube body, there will be some problems such as failure to label smoothly, insufficient labeling fastness, and poor display effect after labeling. Taken together, the main reason for these labeling problems is that the labeling surface is not necessarily flat after unfolding. This has requirements for the material of the labeling surface. At the same time, the adhesiveness of the labeling glue, the labeling equipment and the operators will be affected. Very high requirements. At this time, if you blindly consider the labeling process, it may not be worth the loss, and it will not meet the market's publicity effect and requirements. This suggests the use of a new bottle solution-shrink film solution material.

The shrink film used in the bottle body is actually a kind of Heat Shrink Film. When heated (about 70°C), the shrink film will quickly shrink along the outer contour of the container and cling to the surface of the container. There are mainly two types of heat shrinkable film: shrink sleeve type and shrink wrap type. Here is mainly for the design and case introduction of sleeve type shrink film.

In the early stages of product design, if the following situations occur, you can consider the use of shrink film design solutions:

(1) Need to make the bottle body seal sleeve label design that can be opened

(2) 360-degree packaging effect design of the whole bottle

(3) Special bottles, especially some special-shaped bottles

At present, the mainstream materials commonly used in the market are PVC, PET, and materials. Different materials have their own advantages and disadvantages.

The advantages of PVC material are its low cost, low shrinkage force, and simple processing and production process. Its disadvantage is that the material is not environmentally friendly and cannot be recycled. Because PVC shrinks Film relatively smoothly in the application process, and has a price-cost advantage, it has been widely used before. In recent years, because PVC is defined as a non-environmentally friendly material, it has a tendency to be gradually replaced by other materials.

As PVC is characterized as a non-environmentally friendly material, various brand terminals have chosen to use PET as an alternative material. At the same time, due to the increase in PET production, the price of PET materials has also declined. These two factors have accelerated the promotion of PETG materials.

The advantages of PETG Shrink Film are recyclability, shrinkage rate of more than 70%, low shrinkage rate in MD direction, good printing adaptability, good stiffness, and good stability. Its disadvantages are relatively high price cost, large shrinkage force, and automatic labeling equipment. Difficult to cut off.

The company provides shrink film of various materials, please feel free to contact the shrink film supplier if necessary