Mitsui Chemicals, Inc.

Shingo Kajiyama

Kenichi Suzuki

Akio Matsubara

Hirohisa Shiode

Takayuki Kubo

An object of the invention is to obtain spunbonded nonwoven fabrics including thin hollow fibers which have excellent lightweight properties and uniformity as well as exhibit high strength and flexibility. An aspect of the invention is directed to a spunbonded nonwoven fabric including hollow fibers of a propylene polymer, the hollow fibers satisfying the following requirements (a) to (c): (a) the C-axis orientation is at least 0.85, (b) the average fiber diameter is 5 to 20 &#x3bc;m, and (c) the hollowness is 5 to 30%.

Spunbonded nonwoven fabrics

It is an object of the present invention to provide a stable production process for a melt-blown nonwoven fabric comprising thin fibers and having extremely few thick fibers [number of fusion-bonded fibers] formed by fusion bonding of thermoplastic resin fibers to one another, and an apparatus for the same. The present invention relates to a melt-blown nonwoven fabric comprising polyolefin fibers and having (i) a mean fiber diameter of not more than 2.0 &#x3bc;m, (ii) a fiber diameter distribution CV value of not more than 60%, and (iii) 15 or less fusion-bonded fibers based on 100 fibers; a production process for a melt-blown nonwoven fabric characterized by feeding cooling air of not higher than 30&#xb0; C. from both side surfaces of outlets of slitsfrom which high-temperature high-velocity air is gushed out and thereby cooling the spun molten resin; and a production apparatus for the same.

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Ichihara, Japan

Shingo Kajiyama