1. Prepolymer (HDI / TDI + PPEG)
Main film former, provides bonding strength.
2. Filler (such as calcium carbonate, talc)
Reduce cost, increase volume.
3. Inhibitor (such as BHT)
Prevent cross-linking reaction during storage.
4. Stabilizer (UV absorber)
Improve weather resistance.
5. Plasticizer (such as DOP)
Increase flexibility, adjust viscosity.
6. Additive (thixotropic agent, defoamer)
Improve fluidity or defoaming.
7. Moisture control agent (such as molecular sieve)
Absorb moisture and extend shelf life.
PU Glue Production Process

Recommendations for PU Glue Production Line Key Equipment Selection
| Equipment | Recommended type | Remarks |
| Reactor | Jacket reactor (with stirring, vacuum, temperature control) | Material must be corrosion-resistant (such as SS304/316) |
| Mixer | Double planetary mixer / triple shaft mixer | Select power according to viscosity |
| Degassing equipment | Vacuum system / centrifugal degassing machine | High viscosity glue requires strong degassing |
| Filling machine | Fully automatic metering filling machine | Anti-curing deisgn (such as heating pipeline) |

