What is the difference between polyester and resin?
Resins are natural substances, while polyesters are synthetic.
Polyester mainly refers to a class of substances that contain ester groups
This is equivalent to the metal and resin appellation. It has two meanings, one refers to the material, the equivalent alloy, such as phenolic resin, which is equivalent to the mean. Just a copper aluminum alloy material name. The second meaning refers to the initial does not add any substance...
