PA-6 (PA-6, Nylon)
PA-6 or Nylon – is a crystallizing polymer, obtained by low temperature anionic polymerization of caprolactam (aminocapronic acid) using various promoters and alkaline catalysts.
Thanks to that PA-6 has unique properties – high strength and specific density, that is why it is very often used in industry and machine building as substitute for bronze, aluminium and other non-ferrous metals.
AMONG MAIN ADVANTAGES OF PA-6 THERE ARE:
- ecological safety;
- low friction coefficient; high chemical durability;
- wear resistance and durability to rubbing on matching surfaces;
- low weight;
- high bearing capacity;
- creep resistance;
- absorbing dynamic loads;
- absorbing certain level of vibration and noise, and also some volume of liquid;
- stability to gasoline, thinners, oils, alkali; corrosion resistance and decay resistance;
- operability within wide temperature range, particularly at constant operating temperature of 100°C.
Except that PA-6 has good antifriction and dielectric properties and adhesiveness, because of this it is easily processible by: grinding, milling, drilling, grinding and painting.
At present PA-6 is a material in very high demand, used to make structural parts and general-purpose parts, which due to their usage should be strong and hard at the same time. Except that PA-6 application permits to reduce requirements to lubrication and lubricants. That is why this material is indispensable for production of parts for machines and equipment with constant friction effect.
Also of importance is that PA-6 may be made in any color per custom order, it is easily adaptable for production tasks. Besides, application of PA-6 contributes in significant reduction of ready product cost and labor input into its production.
SO, MAIN INDUSTRIES USING PA-6, ARE:
- paper and pulp industry;
- food industry;
- textile industry;
- chemical industry;
- aerospace industry;
- electrotechnical industry;
- instrument making;
- machine building;
- civil construction;
- maritime;
- mining.
Parameter |
Norm |
|
|
PA-6 V |
PA-6 G |
Appearance |
Sheets, sleeves, rods, from white to cream color, with smooth surface without chips and cavities |
Sheets, sleeves, rods, dark grey color, with smooth surface without chips and cavities |
Density, kg/cub.m |
1150-1160 |
1160-1170 |
Melting temperature, °С |
220-225 |
215-220 |
Tensile stress at break, MPa |
70-85 |
65-80 |
Relative elongation, % |
10-25 |
|
Stress at relative compression deformation equal to 25%, MPa |
100-130 |
120-140 |
Softening temperature at bending under stress 1,8 MPa, °С |
80-100 |
90-100 |
Water absorption in 24 hours, % |
1,5-2,0 |
1,0-1,5 |
Maximal water absorption, % |
6,0-7,0 |
6,5-7,0 |
Thermal conductivity factor at room temperature, W/m.degr |
0,29 |
0,37-0,42 |
Surface resistivity, Ohm |
6*1014 – 3,5*1015 |
- |
Volume resistivity, Ohm*m |
(2,0-6,0)*1014 |
- |
Dielectric loss tangent at frequency 106 Hz |
0,015-0,025 |
0,020-0,030 |
Dielectric permeability at 106 Hz |
3,0-3,3 |
3,5-4,0 |
Electrical strength, kW/mm |
30-35 |
- |
Coefficient of friction against steel |
0,2-0,3 |
0,2-0,25 |
Hardness at ball indentation, MPa |
160-180 |
140-150 |
Impact resilience, kJ/sq.m, not less |
|
|
unnotched |
120 |
40 |
notched |
3 |
4 |
Contents of extractable matters, % |
2,0-4,0 |
- |