Resin usually refers to the range of softening or melting after being heated. When softening, it tends to flow under external force. It is solid or semi-solid at room temperature, and sometimes it may be a liquid organic polymer. According to needs, resin can be made into ornaments, handicrafts, etc., which has a very wide range of applications. The following editors will introduce some resin related knowledge.
Generally, resin refers to a range of softening or melting after being heated, and it tends to flow under external force during softening. At room temperature, it is semi-solid, solid, and sometimes may be a liquid organic polymer. Broadly speaking, any polymer compound that can be used as a raw material for processing plastic products can be called a resin. Resin is the main raw material for the production of plastics, and it is also used to make paints (the main film-forming materials of paints, such as alkyd resins, acrylic resins, and synthetic fatty acid resins. These resins are mostly in the Yangtze River Delta and the Pearl River Delta, which is also a booming paint industry Areas, such as Newpes resin, Changxing chemical, DSM resin, Sanying resin, etc.), adhesives, insulating materials, etc. In the industrial production process, synthetic resins are widely used in the separation and separation of impurities in liquids Purification, there are macroporous adsorption resin, ion exchange resin and some special resins.
Second, the hardening process
Resin bond mill has two hardening methods: primary hardening method and secondary hardening method. The grinding tool is heated and hardened on a hot press for 30-40 minutes to become a finished product called a one-time hardening method. It is suitable for small, thin and profiled wheels. In order to obtain a completely hardened product, although some large-scale, thick-thickness grinding wheels are initially hardened on a hot press, they still need to be re-hardened in an electric oven. This method is called secondary hardening.
1. By source
Resin is divided into natural resin and synthetic resin. Natural resin refers to the amorphous organic substances obtained from animal and plant secretions in nature, such as shellac, amber, rosin, etc. Synthetic resin refers to resin products obtained by chemical synthesis of simple organic matter or chemical reaction of certain natural products, such as polyvinyl chloride resin, phenolic resin, etc. Synthetic resin is the main component of plastic.
2. According to the synthesis reaction
According to this method, the resin can be divided into addition polymer and condensation polymer. The addition polymer refers to a polymer prepared by addition polymerization, and the chemical formula of its link structure is the same as the molecular formula of the monomer, such as polyethylene, polytetrafluoroethylene, polystyrene, etc.
Polycondensate refers to a polymer made by condensation polymerization. The chemical formula of the structural unit is different from the molecular formula of the monomer, such as phenol resin, polyamide resin, polyester resin, etc.
3. According to the molecular main chain
According to this method, the resin can be divided into carbon chain polymer, heterochain polymer and element organic polymer.
Carbon chain polymer refers to a polymer whose main chain is entirely composed of carbon atoms, such as polyethylene, polystyrene, etc.
Heterochain polymer refers to a polymer whose main chain is composed of atoms of two or more elements such as carbon and sulfur, nitrogen, and oxygen, such as polyoxymethylene, polyamide, polyether, and polysulfone.
Elemental organic polymer refers to the main chain does not necessarily contain carbon atoms, mainly composed of atoms of silicon, oxygen, aluminum, titanium, boron, phosphorus, sulfur and other elements, such as organic silicon.
4. By nature
Thermosetting resin: unsaturated polyester / vinyl ester / epoxy / phenolic / bismaleimide / polyimide resin, etc.
Thermoplastic resin: polypropylene (PP) / polycarbonate (PC) / nylon (NYLON) / polyethersulfone / polyetheretherketone (PEEK), etc.
Synthetic resin is a type of polymer synthesized by man. An important application of synthetic resins is the manufacture of plastics.
Through the introduction of the above content, you have some understanding of what resin is. I hope that the introduction of the above knowledge of resin can help you. If you have a demand for resin, please contact us, we are a professional resin manufacturer