Tons of bags make us come into contact with a wide range of products in life, because any product wants to sell it needs to be packaged, so no matter what packaging materials, after long-term use, by external reasons and their own factors, it is easy to appear aging and cracks, of course, this shows that we should change the new packaging. Therefore, it is very important to prevent the aging of tons of bags, many people do not understand these contents, so let's take a look at how to prevent the aging of tons of bags.
1. Ultraviolet light is one of the main reasons, because the bag in storage, transportation, use and other aspects of the most exposed to the sun, the ultraviolet light in the sun has high energy, can promote the production of free radicals and hydrogen and oxygen compounds, thereby causing the break of the molecular chain in polypropylene, so the bag is shown as the tensile ability to weaken. In addition to this, there are local differences in temperature and humidity to consider.
2. Photooxidation mechanism. The photooxidation mechanism of sunlight has two sources: first, direct sunlight, direct irradiation of the sun; Second, indirect sunlight, due to the reflection of water vapor in the air, dust, etc.; The two main sources of sunlight contain infrared rays, which cause a variety of oxidants and easily degrade polymers. Do not underestimate the impact of this aspect, over time, we will find that the aging of food grade tons of bags is increasingly serious.