How Waterproof Are Bubble Mailers?
Bubble mailers provide tiered water resistance through material engineering and structural design, making them ideal for humid or rainy shipping conditions.
Waterproofing Mechanisms:
✅ Outer Layer Defense
- PE-Laminated Kraft: 0% water penetration after 72h (ISO 5636-3 test)
- Full Poly Coating: Hydrostatic pressure resistance ≥8kPa (IPX4 rating)
✅ Seam Sealing Technology
- Heat-sealed edges withstand 30min heavy rain simulation (ASTM D779)
- Self-adhesive flap with hydrophobic glue
✅ Internal Protection
- Air-filled bubbles create moisture barrier
- Optional desiccant pouch slots
Performance Data
| Test Condition | Result | Standard |
|---|---|---|
| 24h Humidity (95%RH) | 0.3% weight gain | ASTM E96 |
| Heavy Rain (1 hour) | No leakage | ISTA 3A |
| Submersion (30 min) | Inner items remain dry | MIL-STD-810G |
Siliangdi remains committed to innovation, quality, and service. We will continue developing and producing more eco-friendly, high-performance packaging materials, striving to provide exceptional packaging solutions for more enterprises. Together, we enhance brand value and market competitiveness.
Contact Us for Custom Sizes & Private Label Options
Email：packing@siliangdi.com
Email：SLD@siliangdi.com