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Discussion on Resin Material


1 What is Resin?
Resin material is a kind of high chemical molecular material extracted from plants for making various substances. It has the characteristics of structural stability, high temperature resistance, and the form is diverse. At room temperature, the resin material is solid, medium solid, false solid, but sometimes it is also a liquid organic substance. The resin material has a softening or melting temperature range, has a tendency to flow under the action of external force, and is often shell-shaped when broken. Broadly refers to polymers or prepolymers used as plastic substrates. Generally insoluble in water, soluble in organic solvents.

2. Classification of resin

3. Commonly used resin

3.1 phenolic resin

Phenolic resin is also called bakelite, also known as bakelite powder. The original is colorless or yellowish brown transparent, market sales often add colorants and red, yellow, black, green, brown, blue and other colors, particles, powder. It is resistant to weak acid and weak alkali, decomposes in case of strong acid, and corrodes in case of strong alkali. Insoluble in water, soluble in acetone, alcohol and other organic solvents. Phenolic aldehyde or its derivatives polycondensation.
Phenolic plastic has high mechanical strength, good insulation, heat resistance, corrosion resistance; bakelite characteristics are non-absorbent, non-conductive, high temperature resistance, high strength, mostly used in electrical appliances, and because of the high plasticity like wood insulation Good, so it is called "bakelite".
As one of the earliest industrialized synthetic resins, phenolic resin has the advantages of low raw material price, simple and mature production process, and good chemical stability, which has been widely concerned and applied in industry. Although bakelite products are molded by heating, the processing time is longer than that of ordinary plastics, and the mold wear is higher than that of steel, but because of its dominant position in the price of raw materials, it is still the preferred substitute for many plastic parts. Bakelite, once heated and formed, can no longer be solidified to cause other things, with non-absorbent, non-conductive, high temperature resistance, high strength and other characteristics.

3.2 epoxy resin

Epoxy resin generally refers to organic polymer compounds containing two or more epoxy groups in the molecule, except for individual, their relative molecular mass is not high. The molecular structure of epoxy resin is characterized by the active epoxy group in the molecular chain, and the epoxy group can be located at the end, middle or ring structure of the molecular chain. Because of the active epoxy groups in the molecular structure, they can be cross-linked with various types of curing agents to form insoluble, infusible polymers with a three-way network structure.

3.3 PTFE

PTFE polytetrafluoroethylene is a high-performance multifunctional fluoropolymer composed of carbon atoms and fluorine atoms. Fluoropolymers are a group of plastics with a wide range of properties and advantages. PTFE is one such fluoropolymer whose discovery forever revolutionized the fluoropolymer group and paved the way for a variety of applications.
Polytetrafluoroethylene [PTFE,F4], is one of the best corrosion resistance materials in the world today, so it is known as the "plastic king. It can be used in any kind of chemical medium for a long time, PTFE seals, gaskets, gaskets. PTFE seals, gaskets, gaskets are made of suspension polymerization PTFE resin molding. Compared with other plastics, PTFE has the characteristics of excellent chemical corrosion resistance and temperature resistance, and it has been widely used as a sealing material and filling material.

One of the common applications of PTFE materials includes non-stick coatings for kitchen cookware. Because of its non-reactivity, due in part to the strength of the carbon-fluorine bond, it is commonly used in the manufacture of pipes and containers for reactive and corrosive chemicals.

3.4 polyimide

Polyimide (PI) is one of the organic polymer materials with the best comprehensive performance, and is known as the top material of the polymer material pyramid. Whether as a structural material or as a functional material, it has great application prospects. Polyimide is listed as one of the most promising engineering plastics in the 21st century, and all countries are including the research, development and utilization of PI as one of the development priorities of new chemical materials in the 21st century.

3.5 polyethylene

Polyethylene (polyethylene, PE) is a thermoplastic resin made by the polymerization of ethylene. In industry, copolymers of ethylene with small amounts of α-olefins are also included. Polyethylene odorless, non-toxic, feel like wax, has excellent low temperature resistance (the lowest use temperature of up to -100 ~-70 ° C), good chemical stability, resistance to most of the acid and alkali erosion (not resistant to oxidation of the nature of the acid). Insoluble in general solvents at room temperature, small water absorption, excellent electrical insulation.
Polyethylene can be blow molding, extrusion, injection molding and other methods of processing, widely used in the manufacture of film, hollow products, fiber and daily sundry products.

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