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Advantages and uses of nylon and classification of nylon materials

Time : 2022-12-16 Hits : 31

Nylon, the scientific name is polyamidefibre.It is the world's earliest synthetic fiber variety, because of its excellent performance, rich raw material resources, has been widely used.

Nylon is the United States outstanding scientist Carothers and under the leadership of a scientific research team developed, is the world's first synthetic fiber. The appearance of nylon makes the textile look completely new, its synthesis is a major breakthrough in the synthetic fiber industry, but also a very important milestone in polymer chemistry.

In 1935, the polymer was prepared with adipic acid and adipic diamine as raw materials. Because the two components both contained 6 carbon atoms, it was called polymer 66 at that time. He melted the polymer and pressed it out with an injection needle, stretching it under tension and calling it a fiber. This fiber is polyamide 66 fiber, named Nylon after the industrialization in 1939, is the earliest synthetic fiber variety to realize industrialization.

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From this comes the name nylon. The nylon polymerized by lactam ring-opening is called nylon. For example, PA6 is obtained by the ring-opening polymerization of caprolactam. The polymer obtained from the condensation of dibasic acid and dibasic amine is called nylon mn, where m represents the number of carbon atoms in the main chain part of the dibasic amine, and n represents the number of carbon atoms in the main chain part of the dibasic acid. For example, PA610 is obtained from the condensation of sebacic acid and adipdiamine. It is expressed by the abbreviation of repeated diamine or diacid, such as m-benzodimethylamine is referred to as MXDA, so the polymer of m-benzodimethylamine and adipic acid is called nylon MXD6.

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Advantages of nylon

Strong strength, good wear resistance, the first among all fibers. Its wear resistance is 10 times that of cotton fiber, 10 times that of dry viscose fiber and 140 times that of wet fiber. As a result, its durability is excellent.

The elasticity and resilience of nylon fabric is very good, but it is easy to deform under small external force, so the fabric is easy to wrinkle in the process of wearing.

Poor ventilation, easy to produce static electricity.

The hygroscopic property of nylon fabric is a better variety in synthetic fiber fabric, so clothing made of nylon is more comfortable than polyester clothing.

It has good resistance to cavities and corrosion.

Heat resistance and light resistance are not good enough, ironing temperature should be controlled below 140℃. Pay attention to washing and maintenance conditions in the process of wearing, so as not to damage the fabric.

Nylon fabric is a lightweight fabric, only listed in the synthetic fiber fabric after polypropylene, acrylic fabric, therefore, suitable for mountaineering clothing, winter clothing.

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The main uses of nylon

Its main uses can be divided into three areas: clothing and apparel, industrial and decorative carpets:

Garment fibre

Nylon can be woven into pure fabrics or used as a raw material for woven, knitted and weft fabrics after treatments such as deformation and flexing.nylon can be woven into pure fabric, or it can be changed into nylon fdy yarn,nylon dty yarn,nylon spandex covered yarn andnylon industrial yarnafter being deformed and bent, etc. It is used as an ingredient for woven, knitted and weft fabrics.

Industrial fibre

With high wet and dry strength and corrosion resistance, it is an ideal material for manufacturing industrial press cloth and paper felt.

Nylon cord tire plays an important role in automobile manufacturing industry. Compared with other types of cord fabrics, due to their high strength, elongation and breaking work, so it

They can withstand the speed and weight of cars at high speeds. Tested these three elements and uneven road surface are less likely to cause tire cracking.

It is durable, soft and lightweight, and can be used in fishing nets, ropes and safety nets.

It is also widely used in various industrial supplies, such as drive belts, fire hoses, sewing thread, safety belts and parachutes.

Carpet fibre

The amount of nylon used in carpets is increasing year by year. Especially because of the development of new technology, nylon has special functions, such as antistatic and flame retardant. In addition, the brigade

The tourism and housing booms have also contributed to the increase in carpet fibres. In recent years, with the rapid development of nylon bulk filament production, the large area of full cover carpet is mainly made of nylon tufted carpet, which has various styles and broad development prospects.

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1.Nylon 6 (PA6)

English name: Polyamide6 or Nylon6, PA6 for short; Nylon 6, also known as polyamide 6, namely polycaprolactam, from caprolactam ring-opening condensation.

Translucent or opaque opalescent resin, with superior mechanical properties, stiffness, toughness, wear resistance and mechanical shock absorption, good insulation and chemical resistance. It is widely used in automotive parts, electronics, electrical and other fields.

2.Nylon 66 (PA66)

English name: Polyamide66 or Nylon6; PA66 for short; Nylon 66, also known as polyamide 66, namely polyadipylhexediamine.

Compared with nylon 6, its mechanical strength, stiffness, heat and wear resistance, creep resistance is better, but the impact strength and mechanical shock absorption performance are decreased. It is widely used in automobile, UAV, electronics and electric.

3.Nylon 1010 (PA1010)

English name: Polyamide1010; Nylon1010; PA1010 for short. Nylon 1010, also known as polyamide 1010, that is, poly maleyl malediamine.

Nylon 1010 is made from castor oil, which was first developed and industrialized by Shanghai celluloid Factory. Its biggest characteristic is that it has a high ductility, can be stretched to 3 ~ 4 times the original length, and high tensile strength, impact and low temperature is excellent, not brittle at -60℃, and has excellent wear resistance, ultra-high toughness and good oil resistance, widely used in aerospace, cable, optical cable, metal or cable surface coating.

4.Nylon 610 (PA610)

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, namely, poly kwai dihexamediamine.

It is translucent milky white. Its strength is between nylon 6 and nylon 66. Small proportion, low crystallinity, low water absorption, good dimensional stability, good wear resistance, self-extinguishing. Used for precision plastic accessories, oil pipelines, containers, ropes, conveyor belts, bearings, textile machinery parts, electrical and electronic insulation materials and instrument shells, etc.

5.Nylon 612 (PA612)

Polyhexamethylene dodecanamide; Polyamide 612; Nylon 612; PA612 for short. Nylon 612, also known as polyamide 612, namely polydodecanylhexediamine.

Nylon 612 is a kind of nylon with good toughness, less density than 610, very low water absorption, excellent wear resistance, small molding shrinkage, hydrolysis resistance and dimensional stability. The most important use is to make high-grade toothbrush monofilament and cable coating.

6. Nylon 11 (PA11)

English name: Polyamide11 or Nylon11; PA11 for short. Nylon 11, also known as polyamide 11, namely polyundeclatam.

It is a white semi-transparent body. Its outstanding characteristics are low melting temperature and wide processing temperature, low water absorption, good low temperature performance, can be maintained in -40℃ ~ 120℃ good flexibility. Mainly used in automobile oil pipeline, brake system hose, fiber optic cable coating, packaging film, daily necessities, etc.

7.Nylon 12 (PA12)

English name: Polyamide12 or Nylon12; PA12 for short. Nylon 12, also known as polyamide 12, that is, polydodecamide.

It is similar to nylon 11 but has lower density, melting point and water absorption than nylon 11. Because it contains a large amount of toughening agent, it has the property of combining polyamide and polyolefin. Its outstanding characteristics are high decomposition temperature, low water absorption and good low temperature resistance. Mainly used in automobile oil pipeline, instrument panel, accelerator pedal, brake hose, electronic and electrical muffler parts, cable sheath.

8.Nylon 46 (PA46)

English name: Polyamide46 or Nylon46; It's PA46 for short. Nylon 46, also known as polyamide 46, namely polyadipylbutylenediamine.

Its outstanding characteristics are high crystallinity, high temperature resistance, high rigidity, high strength. Mainly used for automotive engine and peripheral components, such as cylinder head, cylinder base, oil seal cover, transmission. In the electrical industry, it is used as contactor, socket, coil skeleton, switch and other fields requiring high heat resistance and fatigue strength.

9.Nylon 6T (PA6T)

English name: Polyamide6T or Nylon6T; PA6T for short. Nylon 6T, also known as polyamide 6T, namely polyp-benzoylhexediamine.

Its outstanding characteristics are high temperature resistance (melting point is 370℃, glass temperature is 180℃, can be used at 200℃ for a long time), high strength, stable size, good welding resistance make PA6T especially suitable for adhesive technology (SMT) electronic connectors. Mainly used in automobile parts, oil pump cover, air filter, heat resistant electrical parts such as wiring harness, fuse and so on.

10. Nylon 9T (PA9T)

English name: Polyamide9T or Nylon9T; PA9T for short. Nylon -9T, also known as polyamide -9T, namely polyp-benzoylnonenediamine.

Its outstanding characteristics are: small water absorption, water absorption rate of 0.17%; Good heat resistance (melting point 308℃, glass temperature 126℃), its welding temperature up to 290℃. Mainly used in electronic, electrical, information equipment and automotive parts.

11.English name: Polyamide10T or Nylon10T; PA10T for short. Nylon 10T, polyamide 10T, that is, polyp-benzoyl decanediamine.

Its main characteristics are very low hygroscopicity, high temperature resistance, excellent toughness, rigidity and dimensional stability, good fluidity and machining performance, easy coloring, high strength welding fusion line, melting point up to 300~316℃, density of 1.42g/cm3. PA10T has benzene ring and a long flexible long chain of diamine, which makes the macromolecule have a certain degree of flexibility, and thus has a high crystallization rate and crystallinity, which is suitable for rapid prototyping. Widely used in LED reflection bracket, motor end cover, brush bracket, gear and so on.

12. Transparent nylon (semi-aromatic nylon)

polytrimethyl hexamethylene terephthalamide; transparent polyamide resin; transparent polyamide resin; Transparent nylon is an amorphous polyamide, chemical name: polyp-benzoyltrimethylhexediamine.

The transmittance of visible light reaches 85% ~ 90%. It can inhibit the crystallization of nylon by adding components with copolymerization and stereoscopic barriers, resulting in non-crystalline and hard-crystallized structure, which maintains the original strength and toughness of nylon, and obtain transparent thick wall products. The mechanical properties, electrical properties, mechanical strength and rigidity of transparent nylon are almost the same as those of PC and polysulfone.

13. Nylon 1414 (PA1414)

English name: Polyamide1414; Kevlar. Nylon1414. It's PA1414 for short. Polyphthalamide. Polyphthalamide.

The molecule is mainly composed of rigid benzene ring, belonging to the high rigidity polymer, its molecular structure has a high degree of symmetry and regularity, there is a strong hydrogen bond between large molecular chains, so that the polymer has high strength, high modulus, high temperature resistance, low density, small thermal shrinkage, good dimensional stability and other characteristics, can be made into high strength, high modulus fiber.

14.Nylon 1313 (Aramid 1313)

English name: Polyamide1313; Nomex; Nylon1313; For short PA1313. M-benzoyl chloride and m-benzoenediamine were obtained by condensation polymerization of monomers.

Nomex has mechanical properties and heat resistance much higher than aliphatic PA (as a fiber fabric, the life is 8 times that of aliphatic PA fiber cloth, 20 times that of cotton cloth), good heat aging (surface resistivity and volume resistance remain unchanged after thermal aging at 250℃ for 2000h), and can still maintain good electrical properties under high temperature or humid environment. It is mainly used for H class electrical insulation materials and preparation of high performance fiber (HT-1 fiber).

15. Nylon 56 (PA56)

English name: Polyamide56 or Nylon56; For short: PA56. Nylon 56 is a polycondensation of glutenediamine and adipic acid, which can be extracted from natural organisms.

Environmental protection, good performance, can improve the comfort of the terminal fabric. Its water absorption rate, glass transition temperature, strength, softness, moisture absorption, resilience are better than nylon 6, nylon 66, polyester part of the products.

16. Nylon 1212 (PA1212)

English name: Polyamide1212; Nylon1212; PA1212 for short. It is obtained by polycondensation of twelve diamine and twelve diacid.

PA1212 has the lowest water absorption rate in nylon, good dimensional stability, good oil resistance, alkali resistance, wear resistance, chemical resistance, good transparency, and excellent toughness at low temperature. Widely used in aerospace, automobile, textile, instrument, medical equipment and so on.


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