When was plastic invented? When was plastic invented?

Plastics were invented in the early 20th century. The first fully synthetic plastic came from Belgian-American Leo Hendrick Baekeland, who registered a patent for phenolic plastic.

2. Plastics are macromolecules polymerized by monomers through addition polymerization or polycondensation, commonly known as plastics or resins, which can change their composition and shape freely, and are composed of synthetic resins and additives such as fillers, plasticizers, stabilizers, lubricants and pigments.

3. The main component of plastic is resin. The word resin was originally named after the lipids secreted by animals and plants, such as rosin and shellac. Resin refers to a polymer compound without various additives. Resin accounts for about 40% ~ 100% of the total weight of plastics. The basic properties of plastics mainly depend on the properties of resin, but additives also play an important role. Some plastics are basically composed of synthetic resin with little or no additives, such as plexiglass and polystyrene.