Do industrial-grade PLA plastic bags have some moisture or water resistance?

As a new type of environmentally friendly material, industrial-grade PLA plastic bags are widely used in packaging, logistics and other industrial fields due to their degradable properties. In practical applications, moisture and water resistance are one of the key factors to measure its applicability. Different use environments have different requirements for the water resistance of materials.
The main components of this type of plastic bag come from renewable resources and have good environmental protection properties. However, compared with traditional plastics, there are certain differences in their performance when exposed to water. The base material itself may be affected to a certain extent in an environment with high humidity, such as becoming soft after absorbing some water, or even degrading under certain conditions. However, this phenomenon will not appear in a short time, so during normal storage and use, its basic structural stability can remain in good condition and will not lose its function due to short-term contact with water.
In general industrial use scenarios, in order to enhance its water resistance, special modification measures are often taken during the production process. For example, reinforcing agents are added to the material to form a denser structure on its surface, thereby reducing the penetration of water. In addition, coating a special protective film or using composite materials can also effectively improve its adaptability in humid environments. These improvements can improve its waterproof performance to a certain extent, so that it can resist short-term moisture during storage and transportation.
In practical applications, its moisture resistance is also affected by environmental factors, such as temperature, humidity, and duration of moisture contact. In a relatively dry environment, this type of material can maintain its original mechanical properties for a long time and will not change significantly due to moisture in the air. However, if it is exposed to a high humidity environment for a long time, especially in warehouses or humid areas with heavy water vapor, a certain degree of physical changes may occur, such as slight softening or strength loss. Therefore, during storage and transportation, taking appropriate protective measures, such as sealed packaging or dry storage, can effectively extend its service life.
For application scenarios with higher waterproof requirements, such as liquid packaging or long-term exposure to rain, the use of this plastic bag alone may not provide sufficient protection. At this time, it can be combined with other materials, such as a waterproof lining or a double-layer structure design, to enhance its protective ability. In addition, special formulas can be developed for specific industry needs to provide better moisture resistance while maintaining environmental protection characteristics.