MAYDOS PUR: Goodbye voc
What is PUR Hot Melt Adhesive?
PUR (Polyurethane Reactive) hot melt adhesive is a super-smart glue that combines the best features of traditional hot melt adhesives and chemical bonding. Here’s why it’s special:
1. How It Works
- Starts as a “hot glue”: Applied melted (like regular hot glue guns).
- Then gets stronger with air: Reacts with moisture to form unbreakable bonds (like concrete curing).
2. Key Advantages
✔ No solvents – Safe for workers, no bad smells
✔ Bonds almost anything – Plastics, wood, metal, even tricky materials like PVC
✔ Weatherproof – Survives freezing cold, heat, and water
✔ Flexible but strong – Stretches without breaking (great for shoes/furniture)
3. Where You See It
l Sneakers – That comfy sole won’t peel off
l Car parts – Holds headlights and dashboards together
l Smartphones – Helps seal waterproof designs
l Packaging – Eco-friendly alternative to plastic tape
Why are we suggest PUR
- Environmental Impact: Is It Toxic?
PUR Adhesive:
✅ Solvent-free (no toxic fumes), almost odorless, safe for workers and the environment.
✅ Complies with strict eco-certifications (e.g., EU REACH), ideal for food packaging or kids’ products.
Solvent-Based Glue:
❌ Contains formaldehyde, acetone, etc.—strong smell, harmful if inhaled long-term.
❌ Flammable and explosive; requires careful storage/transport.
2. Bonding Strength: Which Holds Better?
PUR Adhesive:
Chemical Welding: Melts and fuses materials permanently (stronger than the materials themselves).
Extreme Durability: Withstands -40°C to 150°C (great for cars/outdoor use).
Solvent-Based Glue:
Physical Bond: Like “double-sided tape”—weakens over time, prone to cracking/peeling.
Fears heat (>80°C softens it) and moisture (can grow mold).
3. User Experience: Is It Easy to Use?
PUR Adhesive:
✨ Fast Curing: Initial bond in minutes, fully hardens in 24 hours (saves time).
✨ Precision Application: Melted state allows controlled dispensing (no drips).
Solvent-Based Glue:
Slow Drying: Takes hours, attracts dust while wet.
Messy Cleanup: Requires acetone to remove excess glue (may damage surfaces).
4. When to Use Each?
Choose PUR:
- High-strength needs (e.g., car parts, premium furniture).
- Eco-sensitive areas (hospitals, schools, food factories).
- Bonding odd materials (plastic + metal, glass + wood).
- Choose Solvent Glue:
- Quick, cheap fixes.
- Porous materials (e.g., foam, fabric—solvent penetrates well).
5. vs Regular Hot Glue
| Feature | PUR Hot Melt | Normal Hot Glue |
| Strength | Chemical weld (permanent) | Just sticks surface |
| Heat resistance | Up to 150°C | Melts at 80°C |
| Curing time | 24 hrs (gets stronger daily) | Hardens in minutes |
| Price | Expensive（but worth it） | $ (weaker) |
One-Sentence Summary
PUR is the “future glue”—eco-friendly, ultra-strong, and smart, but costs 2-3× more. Solvent glue is the “old-school option”—cheap and simple, but being phased out.
(Think smartphone vs. flip phone!)