Abstract
In this paper, the phenomena of disappearance of the pilling are investigated by means of the microscopic observations.
The phenomena of disapperance of the pilling are very complex, these can be distinguished into two types-degradation in a pill body itself and dropping-away.
The results obtained are as follow:
(1) The phenomena of degradation are carried out in a pill body, which is constructed into a loosely entangled body of the higher elastic modulus fibers such as viscose rayon. Usually the degradation can hardly be observed by naked eyes because of micro-penomena.
(2) The degradation of a pill body may be explained by the fact that the fibers which make pill body are defective in causing slipage and release due to the external actions.
(3) The dropping-away of a pill body may be explained by the facts that the fibers forming pill legs break off due to the fatigue and damage.
(4) Because the scattering states of pill legs on the surface of fabric are remarkably affected to drop-away the pill body, these states are the most important to other shape factors of a pill.
