Why is the color of some stretch film light yellow

Why is the color of some stretch wrap films light yellow? Normally, most of the stretch films we see are transparent or solid colors, such as black, blue, yellow and other colors, and there are few other colors, so why is there a light yellow stretch film?

The light yellow color of the stretch film is mainly caused by the temperature control during production. The production process of stretch stretch film is very mature today. Some manufacturers will try to change the formula to produce stretch film with different properties, mainly reflected in three Aspects: color, stretch rate and self-adhesiveness, a single color change does not necessarily affect the use of the stretch film. It is known that many times the color of the stretch film will change due to the different melting temperatures set by the processing, but it will not affect Transparency, this is a good stretch film, if the stretch rate and self-adhesive properties decrease, it is a poor stretch film, which may be mixed with other impurities.

In fact, strictly speaking, there are only two kinds of stretch film, colorless and colored. The light yellow is mainly caused by dov, color masterbatch and other additives or changes in processing technology. If the color is light, the stretch rate and self-adhesiveness are not affected, it can be used. If the color is unnatural, the quality will generally be poor.

If the color of the stretch film is light yellow, but the transparency, stretch rate, self-adhesiveness have not changed, and there is no peculiar smell, it can be used. If the four indicators change, do not use it anymore.