The porous wool fiber which has the porous section where the void contents (proportion of entire area of hole which is occupied in the entire

摘要

PROBLEM TO BE SOLVED: To achieve the improvement of color developing property, heat insulating property, warmth-keeping property, moisture absorption and releasing characteristics, heat-generating property on moisture absorption, quick drying property, dry feeling, swelling feeling, etc., of a natural protein fiber and reduced weight of the fiber by forming a multiple number of fine pores on the natural protein fiber such as wool.;SOLUTION: This porous protein fiber is produced through an acid-treating process, a compressing process and a pressure-releasing process. In the acid-treating process, the natural protein fiber is brought into contact with the acid to produce an acid-treated protein fiber. In the compressing process, the acid-treated protein fiber is put into a prescribed pressure-resistant container and then inert gas is injected into the pressure resistant container to pressurize the inside of the container up to a prescribed pressure. In the pressure-releasing process, pressurization is released.;COPYRIGHT: (C)2008,JPO&INPIT