How does POF shrink film achieve shrinking effect

Shrink film is a new type of environmentally friendly packaging material with high transparency, high shrinkage, high toughness, high heat sealing and antistatic properties. It is a relatively safe soft shrink packaging material. There are many types of shrink films on the market, among which POF shrink film has gradually become the mainstream of shrink packaging due to its non-toxic, environmentally friendly, high transparency, high shrinkage, good heat sealing performance, high gloss, strong toughness, and tear resistance. As a result, many POF shrink film factories have appeared on the market, and the product quality is also mixed.
When many customers who use POF shrink film find that the packaging effect of POF shrink film is poor, that is, the shrinking effect is not good, it is generally believed that there is a problem with the quality of POF shrink film. There is a misunderstanding here. In fact, there are many factors that affect the shrinking effect of POF shrink film, and the poor quality of POF shrink film is not the only factor. Here, the editor briefly explains several factors that affect the shrinking effect of POF shrink film.
First, when most people use POF shrink film, they find that the shrinking effect is poor, and it is not surprising that the quality of POF shrink film itself is poor. The quality of POF shrink film does directly affect its shrinking effect. For example, there are obvious differences in transparency and shrinkage between POF shrink film made of new materials and POF shrink film doped with recycled materials. The cost and selling price of POF shrink film made of doped recycled materials on the market are lower than the former, so it is not uncommon to sell inferior products as good ones.
Secondly, the shrinkage temperature of POF shrink film affects the shrinkage effect. The shrinkage effect is linked to the actual shrinkage temperature. Too high a temperature can easily cause the plastic film to shrink and crack; when the temperature is low, the shrinkage effect of POF shrink film will be uneven. Therefore, manufacturers need to adjust the temperature many times when producing POF shrink film to find the most suitable temperature value.