Import / domestic plastic raw materials distributor in Shanghai

Plastic is not a pure substance we normally use, it is formulated from many materials become. Wherein the polymer (or synthetic resin) is the main component of plastic, in addition, in order to improve the performance of plastics, but also add a variety of auxiliary materials such as fillers, plasticizers, lubricants, stabilizers in the polymer, coloring agents, in order to become a good performance plastics. 1, synthetic resin synthetic resin is the main component of plastic, the content in plastics generally 40% to 100%. Due to the large content and nature of the resin often determines the nature of the plastic, so people often put plastic resin as a synonym. Such as polyvinyl chloride resin and PVC, phenolic resins and phenolic confused. In fact, resin and plastic are two different concepts. Original polymer resin is a raw, it is not only used to make plastics, but also paints, adhesives and synthetic materials. In addition to very small part of the plastic resin containing 100 percent, the vast majority of plastic, in addition to the main component of the resin, but also need to add other substances. 2, also known as fillers Fillers, which can improve the strength and heat resistance of plastics, and reduce costs. Such as phenolic resin after adding wood flour can greatly reduce costs, Bakelite become one of the cheapest plastic, as well as significantly improve the mechanical strength. Fillers and organic fillers can be divided into two types of inorganic fillers, such as wood flour former, rags, paper and various textile fibers, such as glass fiber which, diatomaceous earth, asbestos, carbon black and the like. 3, plasticizers Plasticizers increase the plastic plasticity and flexibility, reduce brittleness, easy to make plastic molding process. Plasticizers are generally miscible with the resin, non-toxic, odorless, light, heat stable, high-boiling organic compounds, most commonly used is phthalates. Such as the production of PVC, if adding more soft PVC plasticizers can be obtained, if not increase or less plus plasticizer (the amount of