At present, bisphenol A epoxy resin is the most widely used in the market. This epoxy resin has the advantages of low price, high bonding strength, good stability and good electrical insulation, but it has poor weather resistance, low impact strength and is not resistant to high temperature. It is definitely impossible to endure the high temperature of 200 degrees for a long time.

If high temperature resistance is required, it is recommended to use multifunctional epoxy resin, such as phenolic epoxy resin, glycidyl amine epoxy resin, alicyclic epoxy resin, etc.

Except PTFE, polypropylene and polyethylene can't be directly bonded with epoxy adhesive. It has good adhesion to most metals and nonmetals (glass, ceramics, wood), so it has the reputation of universal adhesive. So don't worry too much about the adhesion of epoxy resin to copper.

If it is stored in the refrigerator and only endures the instantaneous high temperature, it is recommended to use bisphenol A epoxy, which has the best adhesion performance among epoxy, and its viscosity is relatively thin, so it does not need to add solvents, which is beneficial to the environment.

How strong can a copper bar be remolded by hand? As long as the epoxy resin is completely cured, there is no problem.