Many people believe that biodegradable bags are not as strong as traditional plastic bags. However, laboratory tensile tests have shown that biodegradable bags can match—or even outperform—ordinary PE bags in strength and durability.
Test Item | Traditional PE Bags | PLA Biodegradable Bags | PBAT/PBS Biodegradable Bags |
Tensile Strength (MPa) | 30 (Longitudinal) / 26 (Transverse) | 35 (Longitudinal) / 29 (Transverse) | 28 (Longitudinal) / 25 (Transverse) |
Tear Resistance (10kg Load) | 1.5h, slight seam crack | Over 2h, intact | Close to PLA performance |
Abrasion Test (500 Frictions) | 5.3% damage rate | 4.7% damage rate | 4.9% damage rate |
Conclusion: At the same thickness, mainstream biodegradable bags perform on par with PE bags—sometimes even better.
Degradation only happens in specific composting conditions. In daily use, their stability equals PE bags.
PBAT, for example, has an elongation at break of 500% (vs. 300% for PE), making it more flexible and impact-resistant.
A fashion brand replaced PE bags with 1.2 silk PLA biodegradable bags. After loading 5kg of clothing and testing during shipment:
Industry / Use Case | Recommended Material | Key Advantage |
Logistics & Courier Bags | PBAT + Starch Blend | Anti-tear, durable, fully compostable |
Medical Waste Bags | PLA | Leak-proof, safe incineration |
Food Takeaway Bags | PLA with Oil-proof Coating | Heat & liquid resistant (up to 4h) |
Industrial Packaging | PBAT | High toughness, low breakage with sharp edges |
A fresh food platform using Dulink biodegradable bags reduced bag breakage complaints from 3.2% to 1.8%.
Brand eco-image was significantly improved.
Final Word
Biodegradable bags are not a compromise between quality and eco-friendliness—they can deliver both.
👉 Choose the right material (PLA for short-term use, PBAT for long-term storage).
👉 Always check certifications (e.g., GB/T 38082).
With Dulink, you get packaging that’s durable, eco-friendly, and future-ready.
