3.can not put tons of bags in the sun, because the long-term exposure of the sun will directly cause damage to the tons of bags, the sun contains ultraviolet light, and the ultraviolet light will allow the polypropylene material to be directly oxidized. Ultraviolet ultraviolet rays are the main reason, because the tons of bags are more exposed to sunlight during storage, transportation, use, etc. The ultraviolet rays in the sunlight have high energy, which can promote the generation of free radicals and hydroxides, thereby triggering polypropylene. The breakage of the molecular chain, so the ton bag shows a weakening of the stretching ability.
4. In addition to this, the local temperature and humidity differences should also be considered. Photooxidation mechanism Photooxidation mechanism of sunlight, direct sunlight, direct sunlight; second, indirect sunlight, due to the reflection of water vapor, dust, etc. in the air; the two main sources of sunlight contain infrared rays, which will lead to more An oxidizing agent that readily degrades polymers.
Therefore, when we use tons of bags to transport or store goods, we need to avoid long-term exposure of sunlight, do not place them in a humid environment, and ensure the service life of tons of bags as much as possible.