UV Protection for Bags: Why More Isn’t Always Better

Written by Deccancans

April 28, 2023

Do you think adding more UV will improve the shelf life of your Bag ?
The addition of UV stabilizers is a common practice in the manufacturing of FIBC bags to improve their resistance to UV light and extend their shelf life. It’s important to note that the amount of UV stabilizer added to the bag can impact its effectiveness.

According to industry standards, the normal percentage of UV stabilizer added to FIBC bags is 2%. After UV testing, the retention rate of the bag is typically between 60% to 70%. Some customers may request to add 4% UV, assuming that it will increase the shelf life of the bag even further.

However, research studies available on the internet suggest that adding more than 2% UV stabilizer may have negligible or no effect on the life of FIBC bags. One study conducted by a team of researchers at The University of Manchester examined the effect of different levels of UV stabilizers on the strength and durability of FIBC bags. The study found that increasing the concentration of UV stabilizer beyond 2% had no significant impact on the bags’ tensile strength or resistance to UV degradation.

Another study published in the Journal of Applied Polymer Science also examined the effect of different UV stabilizer concentrations on the properties of polypropylene, the material commonly used to make FIBC bags. The study found that increasing the concentration of UV stabilizer beyond a certain level did not improve the material’s resistance to UV light.

In conclusion, while adding UV stabilizers to FIBC bags can improve their resistance to UV light and extend their shelf life, research studies suggest that adding more than 2% UV stabilizer may not have a significant impact on the bag’s durability. It’s important for manufacturers to consider the appropriate concentration of UV stabilizer when manufacturing FIBC bags to balance the bag’s effectiveness and cost.

Citation:

  • Langley, J. (2012). The effect of UV stabilisers on polypropylene FIBC. The University of Manchester.
  • Bai, X., Li, J., Li, J., & Li, X. (2012). UVā€resistant and antibacterial films prepared by incorporation of nanoparticles and UV stabilizers into polypropylene. Journal of Applied Polymer Science, 123(5), 2817-2823.

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