How to make normal polyolefin shrink film shrink more uniformly?

With the development of the packaging industry and technological advancements, normal polyolefin shrink film, as a common packaging material, has been widely used in various fields. However, during usage, we often encounter an issue where the shrink film may shrink unevenly, affecting the appearance and quality of the packaging. To avoid this situation, we need to explore methods to ensure that the normal polyolefin shrink film shrinks more evenly.

Let's understand why normal polyolefin shrink film may shrink unevenly. This could be due to uneven temperature distribution during the heating process, leading to faster or slower shrinkage in certain areas. It could also result from inconsistent material quality of the film itself, causing different regions to exhibit varying shrinkage properties. Additionally, improper tension control during the packaging process could lead to uneven stretching of the film, thereby affecting the shrinkage effect.

To address these issues, we can take a series of measures to ensure that normal polyolefin shrink film shrinks more evenly. We need to ensure that the heating source is evenly distributed and select appropriate heating methods, such as hot air or infrared radiation, to ensure uniform heating of the entire film surface. Secondly, we should choose consistent film materials to avoid variations in thickness or unstable material properties. During subsequent packaging processes, we need to control tension properly to avoid excessive or insufficient tension that may cause uneven shrinkage of the film. Optimization of packaging machinery, such as adjusting roller speeds and heat sealing times, is also necessary to ensure even force application during film processing.

In practical operations, advanced packaging equipment can be employed, and regular equipment maintenance should be conducted. Training of operating personnel is also essential to ensure that normal polyolefin shrink film shrinks more evenly. Through the implementation of these measures, we can effectively address the issue of uneven shrinkage of the shrink film, improve packaging quality and effectiveness, meet market demands, and promote the development of the packaging industry.