High Quality Water Blocking/Waterproof Powder for Optical Fiber Cable

Water blocking powder is also an important material used for water blocking in optical cables. Water blocking powder is a polymer compound with low crosslinking density, insoluble in water, and high water expansion, abbreviated as SAP. The cross-linking density is low. And the water molecules are easy to penetrate into the resin to make the resin expand. Further hydrophilic and gelatinize into a state of high water absorption. But the crosslinking degree cannot be too low, otherwise it will dissolve in water.

Waterproof powder Technical Indicators and Performance

Composition Shape Water Absorption Capacity pH Moisture Content
Water g/g NaCl(0.9%)/times
Crosslinked Polyacrylate White Powder 8001000 80100 Neutrality ≤7%

 

Processing Performance and Application:

(1) The processing performance of water blocking powder is mainly reflected in two aspects. Fluidity and adhesion ability. Fluidity affects the uniformity of water blocking powder coating. Good fluidity, good uniformity of coating. And adhesive ability and fluidity are a pair of contradictions. Water blocking powder with good fluidity has relatively poor adhesion ability. How to balance this contradiction determines the processing performance of water blocking powder.
Because the suspension polymerization method produces water blocking powder in a spherical shape. While the solution polymerization method produces water blocking powder in a polyhedron shape. The flowability of water blocking powder produced by suspension polymerization method is better than that produced by solution polymerization method. While the adhesion ability is relatively poor.
(2) In water blocking of optical cables, water blocking powder is mainly used for processing water blocking tapes and directly used for water blocking of optical cables.

Application

① Used for processing water blocking tapes.
Water blocking powder is the main component of water blocking tape. Which determines the expansion rate and height of the water blocking tape under the same unit weight. Liquidity affects the uniformity of water blocking powder coating during the production process of water blocking belts. Because the water blocking powder produced by suspension polymerization is spherical in shape. While the water blocking powder produced by solution polymerization is polyhedral. The flowability of water blocking powder produced by suspension polymerization is better than that produced by solution polymerization. During the production process, the water blocking powder produced by suspension polymerization method is easier to evenly apply. But its composite performance is relatively poor.
② Directly used for waterproof of optical cables.
Mainly used for all dry optical cables, typically used inside bundle tubes. This requires that the water blocking powder has good fluidity and is easy to evenly and controllably coat on the inner wall of the bundle tube in the east pipe. While also having a certain adhesive ability to make the water blocking powder stick to the inner wall of the bundle tube. Thus effectively and stably blocking water.

*All products can be customized according to your required parameters

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