Sodium polyacrylate for cables

April 30, 2021

*This article is about one of the sodium polyacrylate’s applications – water blocking material in waterproof tape and waterproof ointment (in cable).

Sodium polyacrylate

Sodium polyacrylate is an absorbent material that can absorb & block water up to hundreds of times of its own weight.


Protect electrical and optical cables


Sodium polyacrylate is a highly coveted product as far as the manufacture of water-proof tapes and ointments for all sorts of cables are concerned; even, optical fiber cables use it.

Features of sodium polyacrylate for cables

1. Strong expanding capability

Once the outer layer of cable was broken, sodium polyacrylate would quickly absorb water and be expanding (to block water). This process will protect the conductor in cables from moisture.

So the expanding capability is the most important point of sodium polyacrylate for cables.


2. Smaller particle size

In general, the smaller particles of sodium polyacrylate bring a faster absorbing rate.

Sodium polyacrylate's particle size can be 10-200 mesh. And cable type should be more than 50 mesh.

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