The Silicon HDPE Duct is a new type of composite pipe with a silicone solid lubricant on the inner wall. Simultaneous extrusion and compounding by two plastic extruders, the main raw material is high-density polyethylene, and the core layer is a solid lubricant silica gel with the lowest friction coefficient. Therefore, the silicon core tube has many characteristics unmatched by other products in terms of physical properties, service life, comprehensive cost, and optical fiber cable construction.

HDPE DUCT FOR CABLE

Physical, mechanical and electrical properties

 

Test Method

Acceptance Criteria

Drop hammer impact

GB/T14152

10/10 not broken

Ring stiffness

GB9647

30KN/m2

Flat test

GB5836-86

does not break

Friction coefficient of inner wall of HDPE

Flat plate method

0.20

 

Round drum method

0.15

Recovery rate

 

When the vertical direction is pressed to 70% of the original outer diameter, the load is immediately unloaded, the sample is not broken, no delamination, and the outer diameter can naturally recover to more than 90%

Tensile strength

GB8804.2

18Mpa

Elongation at break

GB8804.2

380%

Longitudinal retraction rate

GB6671.2

3.0%

Connecting point pulling force

 

4300N

Maximum traction load

Speed 50mm/min

10000N

Low temperature drop test

Temperature -30, 1m height

does not crack

Connection sealing test

Temperature 20, Pressure 0.15MPa, 15min

no change in pressure

Power frequency breakdown strength

 

15KV/mm

Minimum bending radius

 

625mm

Density of HDPE

ASTM D792

0.940 to 0.958g/cm3