Loose tube optical cable water-blocking materials

Optical cable water-blocking materials

what is optical cable oil filled?

  It is the main protective layer of the optical fiber, which can prevent erosion by moisture in the air and alleviate the impact of external mechanical forces such as vibration, impact, and bending on the optical fiber. It is an important material that affects the excess length of the optical fiber.

what is water-blocking yarn/tape?

  The yarn with super water absorption capacity is made of polyester fiber filament dip-coated and highly absorbent polyacrylic resin. It expands rapidly when it comes into contact with water, and the gel is uniform and stable. The product is widely used in the water-blocking and moisture-proofing of the cable core and inner and outer sheaths of communication cables and communication optical cables, and is also used for the water-blocking and moisture-proofing of cross-linked polyethylene insulated power cables and submarine cable comprehensive waterproof layers.

Disadvantages and advantages between oil-filled VS water-blocking yarn and water-blocking tape

Disadvantages ：

1. When the oil-filled optical cable is installed vertically, due to the effect of gravity, the grease will drip vertically, causing the grease to be deposited at the lower end of the optical cable, while the upper part of the optical cable loses its water-blocking effect due to the lack of grease protection.
2. Filling with water-blocking grease increases the weight of the optical cable, increasing the difficulty and cost of transporting the optical cable
3. The filling grease must be cleaned during the installation of the oil-filled optical cable, and the optical cable bundle core and optical fiber need to be cleaned with a cleaning agent, which brings many additional processes to the construction of the optical cable and environmental pollution problems caused by the cleaning agent/cleaning paper, greatly increasing the construction time and construction costs

4. water blocking yarn cost exspensive

Advantages:

1. Water-blocking tape and water-blocking yarn are both dry water-soluble swelling materials. Compared with ointment, they are light in weight, convenient for optical cable connection, no need to clean ointment, and good compatibility with other materials.

2. Oil filled cost cheap