What is Silicon core tube
Silicon core pipe is a new type of composite pipe with silicone solid lubricant on the inner wall. It has good sealing performance, chemical resistance and low engineering cost. It is widely used in optical cable communication network systems such as highways and railways. HDPE silicon core tube is a new type of composite pipe with silicone solid lubricant on the inner wall, referred to as silicon tube. It is synchronously extruded and compounded by three plastic extruders. The main raw material is high-density polyethylene, and the core layer is the solid lubricant silicone with the lowest friction coefficient. Widely used in optical cable communication network system.
Chinese name Silicon core tube Foreign name Silicon core tube Elongation at break ≥350 Tensile strength ≥21 (MPa) Maximum traction load ≥8000 (N)
table of Contents
1 Performance characteristics
2 Technical indicators
3 Product specifications
Performance characteristics
The silicon core layer on its inner wall is a solid, permanent lubricant;
The silicon core layer on the inner wall is squeezed into the high-density polyethylene pipe wall synchronously, and the entire inner wall of the pipe is evenly distributed, without peeling off and detaching, and having the same life as the silicon pipe;
The silicon core layer on its inner wall has the same physical and mechanical properties as high-density polyethylene;
The friction characteristics of the silicon core layer on the inner wall remain unchanged, and the cable can be extracted repeatedly in the pipeline
The silicon core layer on its inner wall does not react with water, and the pipeline can be washed with water after an accident.
Technical index
No. Item Technical Index
Appearance quality The appearance color is uniform and uniform; the inner and outer wall entities should be flat, uniform and smooth, free of defects such as collapse, pits, holes, tear marks and impurities and pits; no air bubbles and cracks in the cross section; the inner wall is tightly fused and free of separation; The product logo on the outer wall is complete and clear.
Outer wall hardness ≥59 (Shore D type)
Inner wall friction coefficient Static: ≤0.25 (flat plate method, for HDPE standard test bar)
Dynamic: ≤0.15
Cold bending radius (mm) 400
Ring stiffness (KN / m2) ≥50
Flat test When the pressure in the vertical direction is increased to 50% of the original outer diameter, the load is immediately unloaded, and the sample does not break or delaminate.
Recovery rate (%) When pressurized in the vertical direction until the deformation of the outer diameter is 50% of the original outer diameter, the load is immediately unloaded, the sample does not break or delaminate, and the outer diameter can naturally return to more than 85% of the original after 10 minutes.
Impact resistance to falling hammers Normal temperature 23 ° C, height 2m, impact 10 specimens with 15.3kg weight, there should be no cracking of more than 9 specimens.
Low temperature Temperature -20 ℃, height 2m, impacting 10 samples with 15.3kg weight, there should be no cracking of more than 9 samples.
Water pressure resistance sealing performance Under the condition of 20 ℃ and pressure of 50KPa, it can be kept for 24 hours without leakage.
Cracking strength (MPa) ≥2.0
Connection force with pipe joint (N) ≥6700
Longitudinal shrinkage (%) ≤3.0
Temperature (℃) -75
Environmental stress cracking resistance 48h, failure number ≤20%
Melt flow rate (g / 10min) MFR (190 / 2.16) ≤0.5
Heat stress cracking 168h, failure number ≤20%
Power frequency breakdown strength (MV / m) ≥24
Chemical medium corrosion resistance The pipe samples were immersed in 5% NaCL, 40 H2SO4, and 40% NaOH solutions for 24 hours without obvious corrosion.
Hydrocarbon resistance performance After immersed in heptane for 72h, an external force of 528N is applied to the silicon core tube, the sample is not damaged, and the permanent deformation generated does not exceed 5%.
Product specification editing
Silicon core tube specification table
|
Optical cable outer diameter（mm） |
below11 |
12 |
12.5 |
13.5 |
14 |
15 |
16 |
|
Silicon tube inner diameter（mm） |
24 |
26/28 |
26/28 |
26/28 |
28/33 |
33 |
33 |
|
Optical cable outer diameter（mm） |
24 |
25 |
26 |
28 |
30 |
36 |
|
Silicon tube inner diameter（mm） |
42/50 |
42/50 |
50/55 |
50/55 |
50/55 |
50/55 |
Wall thickness: The minimum wall thickness of the silicon tube is 2mm, and the maximum is 6mm. It can also be produced if the wall thickness is special. The most commonly used thickness is 3.0mm, 3.5mm, 4.0mm.
Length: The standard disk length of the 50/42 silicon tube is 1500m, the 40/33 silicon tube is 2000m, and the 32/26 silicon tube is 3000m. If the customer has special needs, it can be shipped in a longer (arbitrary) length under the conditions of convenient transportation and operation.
Color: You can choose any solid color, or you can inlay a vertical stripe of other colors on a solid color silicon tube.
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