For example, the picture shows rubber substrate failure rather than bond failure (where the adhesive would come away from either of the substrate materials without damaging the surface). This is neoprene rubber bonded with Permabond TA4611 to polypropylene with no surface preparation.
Rubber is often a tricky material to bond. Typically only Permabond cyanoacrylates would be recommended for this task, but limitations include gap fill ability, underwater durability, and also difficulty in spreading over a large surface area.
Now all these problems can be solved by bonding rubbers with the TA46XX range instead. Benefits claimed include:
- Excellent environmental durability – good resistance to water
- Gap filling capability
- Can be spread over large areas (low-odour TA4631 can be considered for better worker comfort)
- No need to prime or pre-treat surfaces before bonding
- Can be used to bond rubbers such as neoprene, EPDM, nitrile and butyl rubbers (but not silicone: for silicone, use a cyanoacrylate + POP).
Permabond’s TA46XX range was originally designed for hard-to-bond plastics, like polypropylene, polyethylene, and PTFE. However, it has been found to have excellent adhesion to acetal, PET-G, PET-P, and PEEK. TA4631 is ideal for bonding PET, as it is clear in a thin bond line.
In addition to bonding rubbers and the difficult plastics mentioned above, these adhesives are also suitable for bonding metals, composites, wood, other plastics, concrete, and even tarmac. The bonds also have water resistance, says Permabond.
