Joining Techniques

Joining Techniques

1. Contact Adhesive

   • Advantages
     • Unlike materials
     • Quick-no clamping
     • Ideal for large sheet materials
   • Disadvantages
     • Relatively expensive
     • Solvent based
       • Harmful
       • VOC's
         • Volatile organic compounds
     • Time before pushing together

2. Acrylic Cement

   • Advantages
     • Rapid bonding
   • Disadvantages
     • Difficult to apply
       • For neat joint
     • Relatively expensive
     • Solvent based
       • VOC's

3. Polystyrene Cement

   • For high-impact polystyrene only
   • Advantages
     • Strong bond
       • Melts surfaces
         • Welds together
     • Capillary action
   • Disadvantages
     • Relatively expensive
     • Solvent based
       • VOC's

4. Epoxy Resin

   • Disadvantages
     • Expensive
     • Full strength after few days
     • Mesy mixing of resin and hardener
   • Advantages
     • High-performance
       • Strength of bonds
     • Hardens immediately
     • Versatile
     • Heat and chemical resistance

5. Polyvinyl Acetate (PVA)

   • Woods (porous metals)
   • Advantages
     • Strong joint
     • Relatively inexpensive
   • Disadvantages
     • Clamping-long time
     • Generally not waterproof