| Property |
ASTM |
Units | NYLON 66 | NYLON 66-30%GF |
NYLATRON GS | ACETAL-C | DELRIN |
| Colour | - | - | White | Black | Silver grey | White | White |
| Specific gravity | D792 | - | 1.14-1.15 | 1.35 | 1.14-1.18 | 1.41 | 1.42 |
| Water absorption Saturation in Water |
D570 | % | 7.9 | 5.5 | 6.8 | 0.8 | 0.9 |
| Tensile strength | D638 | N/mm2 | 62/83 | 190 | 69/96 | 62 | 70 |
| Tensile modulus | D638 | N/mm2 | 1733/2744 | 10000 | 3130/4160 | 2795 | 3105 |
| Elongation | D638 | % | 20-200 | 3 | 5-150 | >60 | >30 |
| Flexural strength | D790 | N/mm2 | 86-97 | 270 | 110-130 | 90 | 98 |
| Fexural Modulus | D790 | N/mm2 | 1207-2827 | - | 2758-3448 | 2585 | 2620 |
| Hardness | Rockwell | - | R112-120 | M100 | R110-125 | R120 | R120 |
| Hardness | ShoreD | - | 80-85 | - | 80-90 | - | - |
| Melt point | D2117 | oC | 260 | 255 | 260 | 158 | 175 |
| Max. allowable service temp in air For short periods (1) Continuously for 20000hrs(2)Minimum service temperature |
- - - |
oC oC oC |
160 80 -40 |
145 120 -20 |
160 90 -40 |
140 100 -50 |
145 90 -50 |
| Linear thermal expansion coefficient | D696 | K-1x10-5 | 10 | 4.5 | 6.3 | 12.5 | 11 |
| Thermal conductivity | C117 | W/K.m | 0.24 | 0.24 | 0.3 | 0.23 | 0.23 |
| Flammability | D635 | - | Self Extinguishing | - | Self Extinguishing | Slow Burning | Slow Burning |
| UL (thickness in mm) | UL-94 | - | - | HB (1.6) | - | - | - |
| Volume resistivity | D257 | Ohm.cm | >1013 | >1015 | >1013 | >1012 | >1015 |
| Dielectric strength (3) | D149 | kV/mm | > 12 | 45 | > 20 | > 16 | 20 |
| Outside applications - UV resistance | - | - | C | A | C | D | D |
| Acids - strong (pH <3 ) | - | - | D | C | D | D | D |
| Alkalis - strong (pH > 11) | - | - | C | A | C | C | D |
| Chloinated hydrocarbons | - | - | A | Black | A | A | A |
| Hot water | - | - | C | Black | C | C | D |
| 1. Only a few hours,
with little or no load applied. 2. After these periods mechanical properties reduce by approx. 50% Note, however, that service temperatures are load and time dependent. 3. Test specimen 1.6mm thick unless otherwise stated. A No attack. B Mild attack by absorption. C Dimensional change due to absorption. D Decomposition in short time. E In steam - at 160C, decomposition after short time. The data are typical values and are not intended to represent specifications. Their aim is to guide the user toward a material choice. |
This is probably the best known form of engineering plastic. The frictional characteristics and low weight of Nylon 66 result in wear parts with long life which require little or no lubrication. |
30% glass filled Nylon 66 offers good dimensional stability over its operating temperature range and out performs Nylon 66 in load capacity and stiffness. It can be sterilised and used in hot water. |
Specially formulated Nylon 66 modified with the addition of MoS2. This imparts greatly improved self-lubricating properties. NYLATRON GS exhibits lower friction than unfilled nylon. |
Acetals offer low moisture absorption, high strength and stiffness and impact resistance. Both ACETAL-C and DELRIN grades are similar in their overall balance of properties although each shows some difference from the other in detail. DELRIN offers slightly superior mechanical properties to ACETAL-C although the latter has a higher continuous operating temperature. |
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