Process for producing a non-woven fabric of hot-melt-adhered composite fibers

摘要

A process for producing a non-woven fabric of hot-melt-adhered composite fibers having a high strength in a small weight thereof and soft feeling is provided, which process comprises forming a web of fiber aggregate consisting of sheath and core type composite fibers alone composed of a first (core) component of a fiber-formable polymer and a second (sheath) component of one kind or more of polymers having a m.p.(s) lower than that of the first by 30 DEG C. or more and also having a specified average thickness, or mixed fibers of the composite fibers with other fibers containing the composite fibers in a specified amount; and heat-treating the web at a temperature lower than the m.p. of the first component and equal to or lower than that of the second, and affords to the second, a specified apparent viscosity as measured at a specified rate to thereby stabilize the form of the web by hot-melt-adhesion of the second.