1. What is the advantage and disadvantage of solventless adhesives?
Advantages:
- Applicable to porous surfaces
- High operation speed
- Medium price level
- Solvent-free operation
- Low cost of operation (without solvent recyling and low work safety condition)
- Lower investment costs
Disadvantages:
- Lower initial tack
- Lower temperature / hydrolisis resistance
- High viscosity
- Low adhesion strength
2. What is the advantage and disadvantage of solvent-based adhesives?
Advantages: (compared to solventless adhesives)
- Higher application weights possible
- Higher molar mass of adhesive structure possible
- Higher amount of polyesters based on aromatic structures possible
- This leads to properties not available by other lamination process: high bond strength, high initial tack, good bearing capacity, high temperature resistance, highly hydrolysis resistant.
Disadvantages:
- Porous materials (e.g. paper) not processable
- Lower processing speed (higher price)
- Higher processing costs (solvent recovery, labour protection)
3. What is the advantage and disadvantage of water-based adhesives?
Advantages:
- Cost reduction
- Bond stability
- No organic solvents, No aromatic isocyanates
- Very low residual odor/taste
- Eco-friendly
Disadvantages:
- Slower drying than solvent based adhesives
- Susceptible to freezing at low temperatures.
- Lower water resistance than solvent-based products.
