Are industrial-grade PE plastic bags waterproof and suitable for storing items that are susceptible to moisture?

Industrial-grade PE plastic bags usually have a certain degree of waterproof performance, which makes them have a certain protective effect when storing items that are susceptible to moisture. Polyethylene (PE) itself is a hydrophobic material, which means that it has a natural water resistance and can effectively prevent moisture from penetrating into the bag. However, the waterproof performance of PE plastic bags is still affected by many factors.
The waterproof effect of industrial-grade PE plastic bags is usually related to their material and thickness. Thicker PE plastic bags are more effective in resisting the penetration of external moisture than thin bags, especially when storing items with heavy moisture, they can provide better protection. For items that particularly need to be moisture-proof, using thicker PE plastic bags can effectively prevent the intrusion of moisture and keep the items dry.
Although PE plastic bags have good waterproof performance, their waterproof effect is usually limited to preventing the penetration of water droplets or moisture. For items that are completely immersed in water, PE plastic bags have limited protective capabilities. When exposed to water for a long time or used in extremely humid environments, PE plastic bags may develop tiny cracks or damage, which will affect their waterproof effect. Therefore, while PE plastic bags are suitable for storing items that are susceptible to moisture, other waterproofing measures may be required when encountering a completely wet or soaking environment.
Some industrial-grade PE plastic bags are specially treated or coated to improve their waterproof performance. For example, some PE plastic bags may be coated with a waterproof coating or composite materials, which makes the bags more resistant to moisture penetration and is particularly suitable for storing moisture-sensitive items such as electronic components, chemicals or food.
Although most industrial-grade PE plastic bags are waterproof, their moisture-proof effect has certain limitations. In long-term storage environments, especially in places with large temperature differences, water vapor may condense inside the bag and affect the quality of the items. Therefore, in this case, it is best to use a moisture-proof agent or use sealed bags to ensure that the items in the bag are not damaged by moisture.
Industrial-grade PE plastic bags can provide basic waterproof protection and are suitable for storing some items that are susceptible to moisture, such as paper, fabrics, chemicals, etc. However, for applications that are exposed to moisture for a long time or require complete waterproofing, it may be necessary to choose other materials with higher waterproof ratings or further enhance the protective performance of PE bags.