A brief introduction to the dominant filament nylon filament in the brush_FAQ

The most widely used bristles in the production of industrial brushes should be nylon brush filaments. The main component of nylon brush filaments is polyamide, commonly known as nylon (Nylon), and the English name Polyamide (PA), which contains repeating amide groups on the molecular backbone—[NHCO ]—The general term for thermoplastic resins. Including aliphatic PA, aliphatic-aromatic PA and aromatic PA. Among them, aliphatic PA has many varieties, large output and wide application, and its name is determined by the specific carbon number of the synthetic monomer. The main varieties of nylon are nylon 6 and nylon 66, occupying the leading position. There are many modified varieties of nylon, such as reinforced nylon, monomer cast nylon (MC nylon), reaction injection molding (RIM) nylon, aromatic Family nylon, transparent nylon, high impact (super-tough) nylon, electroplated nylon, conductive nylon, flame-retardant nylon, nylon and other polymer blends and alloys, etc., to meet different special requirements, widely used as metal, wood and other traditions Material substitutes, as various structural materials.　　 Nylon is the most important engineering plastic, and its output ranks first among the five general engineering plastics. Performance: Nylon is a tough angular translucent or milky white crystalline resin. The molecular weight of nylon as an engineering plastic is generally 15,000 to 30,000. Nylon has high mechanical strength, high softening point, heat resistance, low friction coefficient, and abrasion resistance. Self-lubricating, shock-absorbing and sound-absorbing properties, oil resistance, weak acid resistance, alkali resistance and general solvent resistance, good electrical insulation, self-extinguishing, non-toxic, odorless, good weather resistance, poor dyeability. The disadvantage is that the water absorption is large, which affects the dimensional stability and electrical properties. Fiber reinforcement can reduce the water absorption rate of the resin, so that it can work under high temperature and high humidity. Nylon has a very good affinity with glass fiber.　　 Among nylon, nylon 66 has the highest hardness and rigidity, but the toughest. Various nylons are sorted according to their toughness: PA66＜PA66/6＜PA6＜PA610＜PA11＜PA12. The flammability of nylon is UL94v-2, the oxygen index is 24-28, and the decomposition temperature of nylon is more than 299℃, at 449~ Spontaneous combustion occurs at 499°C.　Nylon has good melt fluidity, so the wall thickness of the product can be as small as 1mm. The main technical performance indicators and uses of PA are shown in the table below. Polyamide (nylon) main technical performance index brand 666610612911121010 Density/g.cm31.131.151.071.071.051.041.021.07 Melting point ℃215252220——185186178210 Heat distortion temperature/℃687582————5455——cold temperature ℃/-30- 30-40——-30-40——-40 Tensile strength/MPa75.080.060.062.065.056.065.055.0 Compressive strength MPa85.0105.0————72.570.0——65.0 Flexural strength/MPa120.060.0-100.090. 0——85.070.090.080.0 Notched impact strength/kJm25.55.45.5————3.86——5Volume resistance/Ω·cm10121014101410123.514101310141015 Dielectric constant (1MHz) 3.43.63.53.53.73.73.13.1 Dielectric Loss (1MHz) 0.030.030.040.020.0180.040.030.026 Dielectric strength 1616161616171515 Mold shrinkage% 0.8-2.51.5-2.21.5-2.0——1.5-2.51.2——1.0-2.5 For details, visit www.mxbrushmachinery .com Telephone contact person Mr. Xu