Toray Industries, Inc.

Yohei Nakano

Yoshikazu Yakake

Takuji Kobayashi

Ryoichi Hane

Makoto Nishimura

Hiroyuki Matsuura

Tsuyoshi Tominaga

Daisaku Tanaka

Kazumasa Nagao

Kazunori Sugimoto

Yuji Iyama

Masashi Ito

Jun Yoshida

Yuka Nishiguchi

Daiki Shimada

Masanori Endo

Jun Ogihara

Naoki Shibusawa

Tatsuya Kajino

Koji Yamano

Yuki Ikejiri

The present invention is intended to provide a spunbond nonwoven fabric having low pressure loss, high collecting performance, and excellent processability and an air filter fabricated using the spunbond nonwoven fabric, the spunbond nonwoven fabric including fibers formed of a polyolefin-based resin, in which an average single fiber diameter of the fibers is 6.5 μm or more and 22.0 μm or less, a hindered amine-based compound represented by Formula (1) is contained at 0.1% by mass or more and 5% by mass or less, a melt flow rate (MFR) of the nonwoven fabric is 32 g/10 minutes or more and 850 g/10 minutes or less, and the nonwoven fabric is processed into an electret.

Spun-bonded nonwoven fabric and air filter constituted from spun-bonded nonwoven fabric

The present invention provides a spun-bonded nonwoven fabric which is configured from polyolefin fibers that have excellent spinnability even if the single fiber diameter thereof is small, and which exhibits high flexibility and high uniformity. The present invention relates to a spun-bonded nonwoven fabric which is configured from fibers that are formed from a polyolefin resin and have a single fiber diameter of 6.5-14.5 &#x3bc;m, and which has a melt flow rate of 155-850 g/10 minutes and a CV value of the thickness of 13% or less.

Spun-bonded nonwoven fabric

Problem: The present invention allows a fiber sheet to be densely charged with electric charge and provides an electret fiber sheet that has excellent dust-collecting characteristics. Solution: The electret fiber sheet according to the present invention is an electret fiber sheet in which the relationship between a* and b* measured by a spectrophotometer when a red positive charge toner and a blue negative charge toner are attached to the sheet satisfies the expression: [12&#x2264;{&#x2212;(b*)&#x2212;(a*)}&#x2264;50].

Electret fiber sheet

A method for producing a long fiber nonwoven fabric includes (a) melting resin containing polyphenylene sulfide as main component, discharging it from a spinneret, solidifying resulting filaments by cooling and stretching the filaments by pulling them out of an ejector at a spinning speed of 3,000 m/min or more while heat-treating as the filaments travel to the ejector outlet to provide a long fiber; (b) collecting the long fiber on a moving net to form a nonwoven web; and (c) subjecting the nonwoven web to thermal bonding.

Method for producing long fiber nonwoven fabric

Disclosed is an organic electroluminescent element which has achieved both high luminous efficiency and low driving voltage by containing a light-emitting element material, which comprises a specific pyrene compound, in one of the layers that constitute the light-emitting element, preferably in a light-emitting layer or in an electron-transporting layer. The pyrene compound may have the following general formula: 

Light emitting device material and light emitting device

A production method for a filament non-woven fabric includes a) obtaining filaments having a crystallization temperature not exceeding 112&#xb0; C. by melting a resin containing polyethylene sulfide as a main component which is not substantially copolymerized with trichlorobenzene; b) pulling and drawing fiber threads formed by discharging the melted resin from spinning nozzles at a spinning speed of at least 5,000 m/min and less than 6,000 m/min by an ejector disposed such that a distance between a bottom face of the spinning nozzles and a compressed air emission outlet of the ejector is 450-650 mm; c) collecting obtained filaments on a moving net, forming a non-woven web; and d) thermocompression bonding the obtained non-woven web using a heating roller.

Production method for filament non-woven fabric

A support for a separation membrane includes a long-fiber nonwoven fabric composed of thermoplastic continuous filaments.

Support for separation membrane, and method for production thereof

Growing community of inventors

Otsu, Japan

Yohei Nakano