The filling gels for fiber loose-tube are generally divided into two categories according to the thixotropic gels of which they are composed. Based on the essential elucidation on their respective thixotropic mechanisms

with the help of the rheogeniometer

the tests of the two representative fiber filling gels’ rheological properties including thixotropy and yield stress were carried out. The introductions of thixotropy loop and rheological equations of state buttress us with feasible means to analyse and compare the experimental results of these two gels.