# How does PackDry™ prevent liquid and fine carbon dust from leaking in dehumidifiers and deodorizing bags?

> Source: https://breathablefilm.com/news/knowledge-center/packdry-liquid-dust-leak-prevention/
> Author: kh_sales02
> Published: 2026-05-07
> Updated: 2026-08-28

## Key takeaways

- PackDry™ uses a dual-defense micro-structure: pores about 20,000 times smaller than a water droplet let moisture vapor in while permanently blocking liquid brine from calcium chloride desiccant from leaking back out, even under pressure.
- The same sub-micron pore structure permanently traps carbon powder from active-carbon deodorizers, letting odor molecules escape while keeping black carbon dust fully contained.
- Because most packaging leaks happen at the seams rather than through the film, PackDry™'s solvent-free, pure-polymer composition is also engineered for flawless thermal and ultrasonic seam welding.

## Frequently asked questions

### How does PackDry prevent liquid and fine carbon dust from leaking in dehumidifiers and deodorizing bags?

PackDry uses a dual-defense micro-structure: its microporous film has pores about 20,000 times smaller than a water droplet, so moisture vapor can pass in but liquid brine from calcium chloride desiccant can never seep back out even if the bag is squeezed, and its sub-micron pores permanently trap carbon powder from active-carbon deodorizers so odor molecules escape while black dust cannot. Because most packaging leaks actually happen at the seams rather than through the film, PackDry's solvent-free, pure-polymer composition is also engineered for flawless thermal and ultrasonic seam welding, closing that second failure point.

### Is film porosity alone enough to stop leaks in desiccant and deodorizer packaging?

No — most packaging leaks actually happen at the seams rather than through the film itself. That's why PackDry™'s solvent-free, pure-polymer composition is also engineered for flawless thermal and ultrasonic seam welding, so the pore structure and the seam strength are addressed together.