Also know as plastic sleeve, plastic insert, concrete dowel, concrete insert, Nylon Dowel, PA66 Dowel, being widely used in rail fastening. The Material are HDPE, PA66.
HDPE
No. | Technique parameter | Unit | Technical requirement | Value |
1 | Density | g/ | 0.95-0.98 | 0.95 |
2 | Tensile strength | Mpa | ≥19 | 19 |
3 | Elongation | % | >80 | 150 |
4 | Melting point | °C | 170-190 | 190 |
5 | Insulation resistance | Ω | ≥1×1010 | 3.5×1010 |
6 | Hardness | A | ≥98 | 98(A) |
PA66 : Nylon 66.69%, glass fiber 30%, other 1%
No. | Technique parameter | Unit | Technical requirement | Value |
1 | Density | g | 1.3—1.45 | 1.45 |
2 | Tensile strength | Mpa | ≥170 | 178 |
3 | Elongation | % | ≤4.4 | 4.0 |
4 | Bending Strength | Mpa | ≥250 | 290 |
5 | Impact Strength(No gap) | KJ/m2 | ≥80 | 85 |
6 | Melting point | °C | 250°C—270 | 270 |
7 | Insulation resistance | Ω | ≥1×108 | 5×108 |
8 | Glass fiber content | % | 30—35 | 35 |
9 | Hardness | HRR | ≥110 | 118 |
Railway Screw Dowel is a counter-party of Screw Spike, which is pre-inserted into the concrete sleeper. When we use the rail fastening system, the plastic dowel performed as the fastening base.
