| 摘要 |
<p>A porous fiber resistant to chemicals, large in specific surface area and porosity, so as to be capable of accepting various kinds of adsorptive substances, and adaptable to processing using usual textile machines, which is composed of a fiber proper constituted of high-density polyethylene having a melt-flow rate ranging from 0.3 to 20 g/10 min, and of a multitude of fine pores. Pores are formed through the process that high-density polyethylene is mixed with paraffin wax while melted and the mixture thus obtained is melt-spun with an extruder at a draft rate of 200 or under, subjected to stretching, heat-treatment, mechanical crimping, and removal of said wax. The porous fiber proper amounts to 20 m<2>/g or more in specific surface area, 20 % or more in the ratio of porous part to the total volume, and 50 or under in denier. <IMAGE></p> |
