NANOFIBER AGGREGATE, POLYMER ALLOY FIBER, HYBRID FIBER, FIBROUS STRUCTURES, AND PROCESSES FOR PRODUCTION OF THEM

摘要

The invention provides an aggregate of nanofibers which is not limited in shape or material polymer, is widely applicable and developable, and has a small dispersion of single fiber fineness, and a process for the production thereof. The invention relates to an aggregate of nanofibers which have a number-average single fiber fineness of 1 x 10-7 to 2 x 10-4 dtex and a proportion of single fibers having single fiber fineness ranging from 1 x 10- 7 to 2 x 10-4 dtex of 60 % or above and which are made of a thermoplastic polymer.