The main differences between thermosetting resin and thermoplastic resin are:

① Different solvent resistance. The thermoplastic resin produced by polymerization has strong resistance to organic solvents, so most synthetic fibers can be dry cleaned, and only spandex has poor resistance to solvents; Thermosetting resins such as buttons, resin bead drills and coatings are generally not dry cleaned.

Therefore, various organic solvents, such as tetrachloroethylene, carbon tetrachloride, gasoline, acetone, banana water, etc., are generally packaged in glass bottles or iron drums instead of plastic drums, which is because thermosetting resins are not solvent resistant. The situation that thermosetting resin is not solvent resistant is complex. Not every solvent can dissolve each thermosetting resin.

Laundry staff who work for a long time to remove stains know that alcohol has poor solubility in resin, but it can dissolve plexiglass. In the past, people used all-purpose glue to dissolve plexiglass with alcohol. Now some electric vehicle headlight glass is plexiglass. When it is dirty, it will not be bright, but will become more turbid and unclear, Carefully check that the surface has been dissolved.

② Different heat resistance. The heat resistance of thermosetting fiber is stronger than that of thermoplastic fiber. Once the thermosetting resin has been cured, it will not soften or flow again under pressure and heating. Thermoplastic resin has the properties of heat softening and cooling hardening, which can be maintained even if heating and cooling are repeated for many times.

③ Different uses. Thermosetting resins are mainly used in the manufacture of reinforced plastics, foam plastics, moulded plastics for various electricians, casting products and so on. Thermoplastic resin is widely used, and 2 / 3 of Building Plastics belong to thermoplastic resin. Synthetic fiber is an important kind of thermoplastic resin.