The essence of urea buttons
The high temperature performance of urea buttons, and the strong hardness are all derived from its own manufacturing materials. He mainly consists of novolac resins, thermosetting phenolic resins and oil-soluble phenolic resins. Phenolic resin is also called bakelite, also known as bakelite powder. The original colorless or brownish transparent material, the market sales often add coloring agent and showed red, yellow, black, green, brown, blue and other colors, there are particles, powder. Resistant to weak acids and weak bases, the case of strong acid decomposition occurs, the case of strong alkali corrosion. Insoluble in water, soluble in acetone, alcohol and other organic solvents. Phenol and formaldehyde polycondensation derived. It includes: novolak resins, thermosetting phenolic resins, and oil-soluble phenolic resins. Mainly used in the production of pressure plastic powder, laminated plastics; manufacturing lacquer or insulation, corrosion-resistant coatings; manufacturing of daily necessities, decorations; manufacturing noise insulation materials. Common high-voltage sockets, furniture, plastic handles, etc. Phenolic resin laminate phenolic resin, referred to as PF, phenolic resin is a yellow, transparent, amorphous block material, due to the presence of free molecules and reddish, specific gravity 1.25~1.30, easy Soluble in alcohol, insoluble in water, stable to water, weak acid, weak alkali solution. Resin made by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization, and water washing. Because of the choice of catalysts, they can be divided into two categories, thermosetting and thermoplastic. Phenolic resin has good acid resistance, mechanical properties, heat resistance, widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries. Phenol-formaldehyde resin is the earliest industrialized synthetic resin. High temperature properties The most important feature of phenolic resins is high temperature resistance, which maintains the structural integrity and dimensional stability even at very high temperatures. For this reason, phenolic resins are used in a number of high temperature applications such as refractory materials, friction materials, adhesives, and foundry industries. Phenolic resin refractories bond strength. An important application of phenolic resin is as a binder. Phenolic resin is a versatile material that is compatible with a wide variety of organic and inorganic fillers. The correct phenolic resin is designed to have a particularly fast wetting speed. And after cross-linking, it can be the required mechanical strength, heat resistance and electrical properties for grinding tools, refractory materials, friction materials and bakelite powders. Water-soluble phenolic resins or alcohol-soluble phenolic resins are used to impregnate paper, cotton, glass, asbestos, and other similar materials to provide them with mechanical strength, electrical properties, and the like. Typical examples include electrical insulation and mechanical lamination, clutch plates and filter paper for automotive filters. High residual carbon rate The phenolic resin produces a high residual carbon content under inert gas conditions at a temperature of about 1000[deg.] C., which is advantageous for maintaining the structural stability of the phenolic resin. This property of phenolic resin is also an important reason why it can be used in the field of refractory materials. Low smoke, low toxicity Compared with other resin systems, the phenolic resin system has the advantages of low smoke and low toxicity. In the case of combustion, phenolic resin systems produced with scientific formulations will slowly decompose to produce hydrogen, hydrocarbons, water vapor and carbon oxides. Want to learn more about buttons: accessible For more details, please pay attention to WeChat public number: Carbon Aramid Hybrid Fabric,Carbon Aramid Blended Fabric,Aramid Fiber Hybrid Fabric,Carbon Aramid Fibre Cloth Jiangyin Phecda New Material Technology Co., Ltd , https://www.phecdacomposite.com