Resins typically refer to organic polymers that soften or melt upon heating, exhibit a tendency to flow under external forces when softened, and are solid or semi-solid at room temperature, though they can also be liquid. In a broad sense, any high molecular compound that can be used as a raw material for plastic processing is termed a resin.
There are natural resins and synthetic resins. Natural resins refer to amorphous organic substances obtained from secretions of animals and plants in nature, such as amber, shellac, etc. Synthetic resins are those obtained through chemical synthesis of simple organic substances or through chemical reactions of certain natural products, such as phenolic resins, polyvinyl chloride resins, etc., with synthetic resins being the main component of plastics.
By synthetic reaction
This method allows resins to be categorized into adduct polymers and condensation polymers. Adduct polymers are polymers obtained through addition polymerization reactions, with the chemical formula of their monomer units identical to that of the monomers, such as polyethylene, etc.
Condensate polymers are those obtained from condensation polymerization reactions, whose structural unit chemical formulas differ from the monomer molecular formulas, such as phenolic aldehyde resins, polyamide resins, etc.
By the composition of the main chain of the molecule
This method allows resins to be categorized into carbon chain polymers, heterochain polymers, and elementary organic polymers.
Carbon chain polymers refer to polymers whose main chains are composed entirely of carbon atoms, such as polyethylene, etc.
Random-chain polymers refer to polymers whose main chains are composed of atoms of carbon and oxygen, nitrogen, sulfur, and other two or more elements, such as polyformaldehyde, polyamide, polysulfone, polyether, etc.
Element organic polymers refer to those with a main chain that may not contain carbon atoms, primarily composed of atoms from elements such as silicon, oxygen, aluminum, titanium, boron, sulfur, and phosphorus, such as organosilicon.
As nature
Thermosetting resins (commonly used in glass fiber reinforced plastics): Unsaturated polyester/ Vinyl ester/ Epoxy/ Phenolic/ Bismaleimide (BMI)/ Polyimide resins, etc.
Thermoplastic resins: Polypropylene (PP), Polycarbonate (PC), Nylon (NYLON), PEEK, PES, etc.
Synthetic resins are a type of high polymer produced artificially. Their primary application is in the manufacturing of plastics. To facilitate processing and enhance performance, additives are often added, and sometimes they are used directly for forming, making them synonymous with plastics. Synthetic resins also serve as the basic raw materials for producing synthetic fibers, coatings, adhesives, insulating materials, and more. There are numerous types of synthetic resins, with polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), and ABS resin being the five major general-purpose resins, widely used as synthetic resin materials.
Resin crafts
This set of craft items utilizes resin materials in their design and composition, fully leveraging the material's advantages in smooth lines and bright texture.