Abstract
In order to investigate the effect of air on the expansion mechanism of fiber assemblage, in this research the expansion phenomena of fiber assemblage caused by throwing of radiation energy on its surface in the high vacuum chamber was studied.
As fiber specimens were used the cotton fiber having mid-air and synthetic fiber filled up by its matter, and their behaviour to expansion was compared.
As the results of experiments mentioned above the expansion of fiber assemblage was found to be caused mainly by the air included in fiber itself and to suffer minor effect by the deformation of fiber due to expansion and contraction of its length and width.
Relative humidity of surrounding atmosphere was found to have some effects on expansion of fiber assemblage in case of fibers having ability for moisture penetration showing the better penetration the smaller expansion.
