The plastics that we normally use is not a pure substance. It is made by the preparation of several supplies, in which the large polymer (or synthetic resin) is its major component. In addition, in get to boost the overall performance of plastics, a assortment of auxiliary components must also be additional in the polymer, these kinds of as fillers, plasticizers, lubricants, stabilizers, coloring brokers, and so on, so as to make the plastics have very good performance.
1st, artificial resin
Synthetic resin is the main element of plastics. The general content material of artificial resin in plastics is from 40% to a hundred%. Because of สายรัดกล่อง , the mother nature of synthetic resin typically decides the character of the plastics, so individuals typically take resin as a synonym of plastics. In simple fact, resin and plastics are two different ideas. Resin is a uncooked polymer which has not been processed. Although for most plastics, apart from the resin as its principal component, there are also some other substances.
Fillers can enhance the toughness and warmth-resistant quality of the plastics, as nicely as decrease the value. For instance, introducing wood flour into phenolic resin can drastically reduce the expense, which makes the phenolic plastic as one particular of the least expensive plastics. At the very same time, it can also substantially enhance the mechanical strength. Fillers can be divided into organic and natural filler and inorganic filler, with the previous as wood flour, rags, paper and all sorts of textile fibers, and the latter as glass fibers, diatomaceous earth, asbestos, and carbon black.
Plasticizers can improve the plasticity and versatility of the plastics, reduce brittleness, and make the plastics easy to be processed and molded. Plasticizers are typically natural compounds with substantial boiling point, miscible with the resin, non-harmful, odorless, and stable to light and heat. The commonly utilised plasticizers consist of phthalates, benzophenone, and so on.