Many liquid or paste products, after packaging, may experience pressure differences between the inside and outside due to various reasons, leading to the phenomenon of "bottle swelling" (bulging) or "hollowing out" (internal suction) in the container. Breathable liners are designed to solve this problem.
The three main sources of pressure difference:
1. Product degassing
Some products (such as organic fertilizers, fermented products, and some cosmetics) will continue to release gas, causing the pressure inside the bottle to rise and the container to swell.
2. Oxygen elimination
Some products consume oxygen inside the bottle, resulting in a decrease in internal pressure and container shrinkage.
3. Environmental changes
Changes in temperature or altitude can cause changes in gas pressure, thereby altering the pressure difference inside and outside the container.
How can breathable liners achieve both waterproofing and breathability?
The answer is hidden in that ePTFE breathable membrane. It achieves bidirectional ventilation while blocking liquid flow through a microporous structure (pore size smaller than liquid molecules but larger than gas molecules).
Even ePTFE breathable membranes have their own advantages and disadvantages. Some cheap breathable membranes can only isolate water and have no ability to isolate oil. BAIJUR's breathable liners uses waterproof and oil repellent ePTFE breathable membrane, which can resist the penetration of oil and surfactants, acid, alkali, and organic solvents. It is suitable for more complex formulation systems and most products on the market, ensuring sealing while isolating liquids and being breathable. It can be applied to almost all products that require breathability.
Application of breathable aluminum foil liners.
BAIJUR's breathable aluminum foil liners is widely used in fermented food and beverages, products containing microbial additives, perishable products, high-altitude transportation products, various gas producing products, etc.
