Toray Industries, Inc.

Daiki Shimada

Yoshikazu Yakake

Yohei Nakano

Takuji Kobayashi

Youhei Nakano

Yuki Ikejiri

A melt-blown nonwoven fabric includes a fiber containing a thermoplastic resin, wherein apparent density is 0.1 to 0.4 g/cmand KES surface roughness of at least one surface of the fabric sheet is up to 1.2 &#x3bc;m; and a method of producing the fabric includes conveying a web of the nonwoven fabric by sandwiching the web between two belt conveyers each including a belt having a smooth surface, providing a heat treatment zone where a surface of one or both of the belt conveyers has been heated to a temperature not lower than cold crystallization temperature of the thermoplastic resin and not higher than the temperature &#x2212;3&#xb0; C. lower than melting temperature of the thermoplastic resin in at least a part of a course between the belts, and heating the nonwoven fabric web in the heat treatment zone by contacting both surfaces of the nonwoven fabric web with the belt.

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Otsu, Japan

Daiki Shimada