Polyhexamethylene adipamide, commonly known as nylon-66. A thermoplastic resin. white solid. Density 1.14. The melting point is 253°C. Insoluble in common solvents, only soluble in m-cresol, etc. High mechanical strength and hardness, great rigidity. Can be used as engineering plastics.
According to different molding methods, nylon 66 new material can be formed into nylon 6 slices (also divided into nylon 66 engineering plastics, nylon 66 capsule yarn, nylon 66 carpet type), nylon 66 industrial yarn (mainly used in nylon 66 cord fabrics) ), staple fiber and civilian silk, etc. 88% of nylon 66 is processed into various parts by injection molding, and 12% of nylon 66 is processed into corresponding products by extrusion and blow molding.
1. Features of nylon products:
1. It has good stress resistance, wear resistance and heat resistance. It is a self-extinguishing material and is widely used in the fields of automobile parts, electric power and electronic devices.
2. High mechanical strength, self-lubrication second only to polytetrafluoroethylene (PTFE, due to its molecular characteristics and polymer structure, the material has the best self-lubrication), and is often used in precision gear parts.
3. Excellent oil resistance, soluble in phenol and formic acid, good chemical stability, adding carbon black can improve its weather resistance, and its application in the machinery industry should not be underestimated.
As mentioned above, nylon 66 is widely used in several major fields: automotive field, electronic and electrical field (including precision instrument field), machinery industry field, etc. Although the editor does not have a specific amount of use and waste of each nylon product, relevant people in the industry are well aware of its current accumulation. Today's society calls for sustainable and environmentally friendly development. Due to the following properties, nylon recycled materials are naturally widely used in the industry.
2. Nylon 66 is widely used in several fields：
1. High mechanical strength, good toughness, high tensile and compressive strength. The specific tensile strength of nylon recycled materials is higher than that of metal, and the specific compressive strength is comparable to that of metal, but its rigidity is not as good as that of metal. The tensile strength is close to the yield strength, more than double that of ABS. It has strong absorption capacity for impact and stress vibration, and its impact strength is much higher than that of ordinary plastics, and it is better than acetal resin.
2. The fatigue resistance is outstanding, and the workpiece can still maintain the original mechanical strength after repeated inflection. Common escalator handrails, new bicycle plastic rims and other occasions where periodic fatigue is extremely obvious often use PA.
3. High softening point and heat resistance (such as nylon 46, etc., high heat distortion temperature of high crystalline nylon, which can be used for a long time at 150 degrees. After PA66 is reinforced with glass fiber, its heat distortion temperature can reach more than 250 degrees).
4. The surface is smooth, the friction coefficient is small, and it is wear-resistant. When used as a movable mechanical component, it has self-lubricating properties and low noise. It can be used without lubricant when the friction is not too high; if it is really necessary to use lubricant to reduce friction or help heat dissipation, water, oil, grease, etc. can be selected. Therefore, as a transmission part, its service life is long.
5. The supply of recycled nylon materials is corrosion-resistant, very resistant to alkalis and most salt liquids, also resistant to weak acids, engine oil, gasoline, aromatic compounds and general solvents, inert to aromatic compounds, but not resistant to strong acids and oxidants. It can resist the erosion of gasoline, oil, fat, alcohol, weak alkali, etc. and has good anti-aging ability. It can be used as packaging material for lubricating oil, fuel, etc.
6. Self-extinguishing, non-toxic, odorless, good weather resistance, inert to biological erosion, good antibacterial and mildew resistance.
7. The supply of recycled nylon has excellent electrical properties. Good electrical insulation. Nylon has high volume resistance and high breakdown voltage. In dry environment, it can be used as power frequency insulation material, and it still has good electrical insulation even in high humidity environment.
8. The parts are light in weight, easy to dye and form. Fast flow due to low melt viscosity. It is easy to fill the mold, the freezing point is high after filling the mold, and it can be shaped quickly, so the molding cycle is short and the production efficiency is high.
Post time: 2023-07-06
