| 摘要 |
<p>A water-disintegrable composite fiber comprising: a phase containing a polyglycolic acid resin; and a phase containing another resin having a mass loss of 25% or greater after immersion for 7 days in 80°C pure water and having a glass transition temperature Tg of 25°C or higher;
the two phases extending continuously in the lengthwise direction; and
the fiber having a side surface in which a region formed from the phase containing the polyglycolic acid resin is 50% or less in terms of area ratio, and a cross section in which a region formed from the phase containing the polyglycolic acid resin is 50% or greater in terms of area ratio.</p> |
