Guide:Nylon was developed by the outstanding American scientist Carothers (Carothers) and a scientific research team under his leadership. It was the first synthetic fiber to appear in the world. The emergence of nylon has given a new look to textiles. Its synthesis is a major breakthrough in the synthetic fiber industry and a very important milestone in polymer chemistry.
In 1935, a polymer was made with adipic acid and hexamethylene diamine as raw materials. Since both components contained 6 carbon atoms, it was called polymer 66 at that time. He then melted the polymer and extruded it through an injection needle, and stretched it under tension called fiber. This kind of fiber is polyamide 66 fiber. It was named Nylon after industrialization in 1939. It was the first synthetic fiber variety to realize industrialization.
English name: Polyamide6 or Nylon6, PA6 for short; Nylon 6, also known as polyamide 6, namely polycaprolactam, which is obtained by ring-opening polycondensation of caprolactam.
It is a translucent or opaque milky white resin with excellent mechanical properties, stiffness, toughness, abrasion resistance and mechanical shock absorption, good insulation and chemical resistance. It is widely used in many fields such as auto parts, electronic and electrical components.
English name: Polyamide66 or Nylon6; referred to as PA66; nylon 66, also known as polyamide 66, namely polyhexamethylene adipamide.
Compared with nylon 6, its mechanical strength, stiffness, heat resistance, wear resistance, and creep resistance are better, but the impact strength and mechanical shock absorption performance are reduced. It has a wide range of applications in automobiles, unmanned aerial vehicles, electronic and electrical, etc.
English name: Polyamide1010; Nylon1010; PA1010 for short. Nylon 1010, also known as polyamide 1010, is polysebacamide.
Nylon 1010 is made from castor oil as the basic raw material. It was the first to be successfully developed and industrialized by the Shanghai Celluloid Plant in my country. Its biggest feature is that it has high ductility, can be stretched to 3 to 4 times the original length, and has high tensile strength, excellent impact and low temperature resistance, not brittle at -60°C, and excellent wear resistance. , Ultra-high toughness and good oil resistance, widely used in aerospace, cable, optical cable, metal or cable surface coating, etc.
English name: Poly[imino-1,6-hexanediylimino(1,10-dioxo-1,10-decanediyl)]; Polyamide 610; Nylon 610; PA610 for short. Nylon 610, also known as polyamide 610, is polyhexamethylene sebacamide.
It is translucent and creamy white. Its strength is between nylon 6 and nylon 66. Small specific gravity, low crystallinity, low water absorption, good dimensional stability, good abrasion resistance, and self-extinguishing. Used for precision plastic parts, oil pipelines, containers, ropes, conveyor belts, bearings, textile machinery parts, insulation materials in electrical and electronics, and instrument housings, etc.
English name: Polyhexamethylene dodecanamide; Polyamide 612; Nylon 612; PA612 for short. Nylon 612, also known as polyamide 612, is polylauric hexamethylene diamine.
Nylon 612 is a kind of nylon with better toughness, with a lower density than 610, very low water absorption, excellent wear resistance, small molding shrinkage, excellent hydrolysis resistance and dimensional stability. The main purpose is to make monofilament and cable coating for high-end toothbrushes.
English name: Polyamide11 or Nylon11; referred to as PA11. Nylon 11, also known as polyamide 11, is polyundecanolactam.
It is white translucent. Its outstanding features are low melting temperature, wide processing temperature, low water absorption, good low temperature performance, and good flexibility that can be maintained at -40°C to 120°C. Mainly used for automobile oil pipeline, brake system hose, optical fiber cable coating, packaging film, daily necessities, etc.
English name: Polyamide12 or Nylon12; referred to as PA12. Nylon 12, also known as polyamide 12, is polydodecanamide.
It is similar to nylon 11, but its density, melting point and water absorption are lower than nylon-11. Because it contains a larger amount of toughening agent, it has the combined performance of polyamide and polyolefin. Its outstanding features are high decomposition temperature, low water absorption, and excellent low temperature resistance. Mainly used for automobile fuel pipes, dashboards, accelerator pedals, brake hoses, muffler parts of electronic appliances, and cable sheaths.
English name: Polyamide46 or Nylon46; referred to as PA46. Nylon 46, also known as polyamide 46, is polybutylene adipamide.
Its outstanding features are high crystallinity, high temperature resistance, high rigidity and high strength. Mainly used in automobile engines and peripheral components, such as cylinder heads, cylinder bases, oil seal covers, and transmissions. In the electrical industry, it is used as a contactor, socket, coil bobbin, switch and other fields that require high heat resistance and fatigue strength.
English name: Polyamide6T or Nylon6T; referred to as PA6T. Nylon 6T, also known as polyamide 6T, is polyhexamethylene terephthalamide.
Its outstanding features are high temperature resistance (melting point is 370°C, glass transition temperature is 180°C, long-term use at 200°C), high strength, dimensional stability, and good solder resistance make PA6T especially suitable for adhesive technology (SMT). Electronic connectors. Mainly used in automobile parts, oil pump covers, air filters, heat-resistant electrical parts such as wiring harness wiring boards, fuses, etc.
English name: Polyamide9T or Nylon9T; referred to as PA9T. Nylon-9T, also known as polyamide-9T, is polynonyl terephthalamide.
Its outstanding features are: low water absorption, 0.17% water absorption; good heat resistance (melting point is 308℃, glass transition temperature is 126℃), and its welding temperature is as high as 290℃. Mainly used in electronics, electrical appliances, information equipment and auto parts.
English name: Polyamide10T or Nylon10T; referred to as PA10T. Nylon 10T, and polyamide 10T, that is, polydecane terephthalamide.
Its main characteristics are very low moisture absorption, high temperature resistance, excellent toughness, rigidity and dimensional stability, good fluidity and processing properties, easy coloring, high strength of the welding fusion line, melting point as high as 300~316℃, and density of 1.42 g/cm3. PA10T has a benzene ring and a longer diamine flexible long chain, which makes the macromolecule have a certain degree of flexibility, and thus has a higher crystallization rate and crystallinity, which is suitable for rapid prototyping. Widely used in LED reflector brackets, motor end covers, brush brackets, gears, etc.
English name: polytrimethyl hexamethylene terephthalamide; transparent polyamide resin; transparent nylon is an amorphous polyamide, chemical name: polytrimethyl hexamethylene terephthalamide.
The transmittance of visible light reaches 85% to 90%. It inhibits the crystallization of nylon by adding components with copolymerization and steric barriers to the nylon component, thereby producing an amorphous and difficult-to-crystallize structure. It maintains the original strength and toughness of nylon and obtains transparent thick-walled products. The mechanical properties, electrical properties, mechanical strength and rigidity of transparent nylon are almost at the same level as PC and polysulfone.
English name: Polyamide1414; Kevlar; Nylon1414. Referred to as PA1414. Polyphthalamide.
The molecule is mainly composed of a rigid benzene ring, which is a high-rigidity polymer. Its molecular structure has a high degree of symmetry and regularity. There are strong hydrogen bonds between the macromolecular chains, which makes the polymer have high strength and high modulus. High-strength, high-modulus fibers can be made into high-strength, high-modulus fibers with the characteristics of high volume, high temperature resistance, low density, low heat shrinkability, and good dimensional stability.
English name: Polyamide1313; Nomex; Nylon1313; PA1313 for short. Isophthaloyl chloride and m-phenylenediamine are obtained by condensation polymerization of monomers.
Nomex has much higher mechanical properties and heat resistance than aliphatic PA (as a fiber fabric, life is 8 times that of aliphatic PA fiber cloth and 20 times that of cotton cloth), and good heat aging resistance (250 ℃ heat aging for 2000h After that, the surface resistivity and volume resistance remain unchanged), and it can still maintain good electrical properties in a higher temperature or humid environment. Mainly used for H-class electrical insulation materials and the preparation of high-performance fibers (HT-1 fiber).
English name: Polyamide56 or Nylon56; Abbreviation: PA56. Nylon 56 is formed by polycondensation of pentane diamine and adipic acid. The extraction of pentane diamine can come from natural organisms.
Environmental protection, good performance, can improve the comfort of the terminal fabric. Its water absorption, glass transition temperature, strength, softness, moisture absorption, and resilience are better than some products of nylon 6, nylon 66, and polyester.
English name: Polyamide1212; Nylon1212; PA1212 for short. It is obtained by polycondensation of dodecanediamine and dodecanedioic acid.
PA1212 has the lowest water absorption rate among nylons, good dimensional stability, oil resistance, alkali resistance, abrasion resistance, chemical resistance, transparency, and excellent toughness at low temperatures. It is widely used in aerospace, automobile, textile, instrument, medical equipment, etc.