How non-woven fabric become water resistance

Non-woven fabrics are naturally quite absorbent due to their structure of randomly arranged fibers. To make them water resistant, several treatment methods can be applied:

## Common Water Resistance Treatments

1. **Chemical Treatments**
- Application of fluorochemicals (like fluorocarbons)
- Silicone-based water repellent coatings
- Wax emulsions or paraffin treatments

2. **Lamination Processes**
- Applying a thin polyethylene or polypropylene film
- Bonding with waterproof membranes

3. **Spray Coating**
- Applying hydrophobic polymers through spray application
- Often used for medical and protective garments

4. **Melt-blown Technology**
- Creating inherently water-resistant layers during manufacturing
- Often used in multi-layer non-woven products

The level of water resistance achieved can vary from water-repellent (water beads up and rolls off) to fully waterproof (completely prevents water penetration), depending on the treatment intensity and intended application.