Tips for Bonding Polycarbonate with Industrial Adhesives
How to Bond Polycarbonate
Polycarbonate bonding (PC bonding) – Polycarbonate is a great substrate for bonding with industrial adhesive. Its surface is receptive to adhesive bonding and bond strength normally exceeds the actual substrate strength (meaning that when you try to pull the joint apart the substrate breaks before the adhesive joint).
Cyanoacrylate adhesives are often choosen as they develope strength in seconds. Use as little adhesive necessary between the two substrates to reduce blooming. If appearance is important choose a low odor, low bloom grade such as Permabond 940. Polycarbonate can be prone to stress cracking especiallly if there are significant hoop stresses. Becuase the adhesive lubricates joining, it can be easy to over insert a tube into a cylindrical joint. Designing stops or automated manufacturing can reduce stresses.
UV Curable adhesives are also a great choice for polycarbonate bonding.
Permabond UV630 or UV640 UV/visible light cure products are recommended to cure through the UV stabilized plastic.
Tips for surface preparation and polycarbonate bonding:
1. Providing the surface is clean and dry and free from contamination,
Polycarbonate can be bonded “As Received”.
2. If you do wish to do a solvent wipe before bonding or for clean up
afterward, use isopropanol or Permabond Cleaner A; acetone is too aggressive and can attack the plastic.
Surface energy: 42mJ/m²
Maximum service temperature: 115°C
Softening temperature: 147°C
Normally transparent / clear