Toray Industries, Inc.

Shuichi Nonaka

Takashi Ochi

Takaaki Mihara

Yoshihiro Naruse

Akira Kishiro

Norio Suzuki

Takeo Matsunase

Yuhei Maeda

Katsuhiko Mochizuki

Kakuji Murakami

Keishi Miwa

Satoshi Kondo

Toshiaki Kimura

KaKuji Murakami

Takaaki A2-11 Toray-Yamashina-Shataku Mihara

A spongelike structure or a powder having fibers three-dimensionally arranged therein with high dispersibility, whose apparent density can be designed depending on the purpose or utility, as well as a process producing it. A fiber dispersion in which fibers having a number mean diameter in a predetermined range are dispersed in a dispersion medium, and this fiber dispersion is dried to remove the dispersion medium, thereby, a spongelike structure and a powder are produced.

Process for producing spongelike structure

An abrasive cloth which comprises an article in a sheet form having, in at least a part thereof, nanofibers comprising a thermoplastic polymer and having a number average single fiber fineness of 1&#xd7;10to 2&#xd7;10dtex wherein the sum of single fiber fineness percentages (which is defined in the specification) of a single fiber fineness of 1&#xd7;10to 2&#xd7;10dtex is the range of 60% or more, and exhibits a stress at 10% elongation in a longitudinal direction of 5 to 200 N/cm-width; and a method for preparing a nanofiber structure, which comprises providing a nanofiber dispersion having a dispersant and, dispersed therein, nanofibers comprising a thermoplastic polymer and having a number average diameter of 1 to 500 nm, attaching the dispersion to a support, and then removing said dispersant. The above abrasive cloth is excellent in texturing characteristics, and the above method allows the preparation of a nanofiber structure wherein nanofibers form a composite with the support.

Abrasive cloth and method for producing nanofiber structure

This invention provides compound solutions, emulsions and gels excellent in homogeneous dispersibility and long-term dispersion stability and also excellent in the properties as cosmetics, using disarranged nanofibers not limited in either form or polymer, widely applicable and small in the irregularity of single fiber diameter. This invention also provides a method for producing them. Furthermore, this invention provides synthetic papers composed of fibers, small in pore area and uniform in pore size, using disarranged nanofibers, and also provides a method for producing them. This invention provides compound solutions, emulsions, gels and synthetic papers containing disarranged nanofibers of 1 to 500 nm in number average diameter and 60% or more in the sum Pa of single fiber ratios.

Nano-fiber compound solutions, emulsions and gels, production method thereof, Nano-fiber synthetic papers, and production method thereof

The present invention provides an aggregate of nanofibers having less spread of single fiber fineness values that can be used in wide applications without limitation to the shape and the kind of the polymer, and a method for manufacturing the same. The present invention is an aggregate of nanofibers made of a thermoplastic polymer having single fiber fineness by number average in a range from 1&#xd7;10to 2&#xd7;10dtex and single fibers of 60% or more in fineness ratio have single fiber fineness in a range from 1&#xd7;10to 2&#xd7;10dtex.

Nanofiber aggregate, polymer alloy fiber, hybrid fiber, fibrous structures, and processes for production of them

Polylactic acid fibers excellent in wearing resistance and in the ability to smoothly pass through processing steps. The polylactic acid fibers contain a fatty acid bisamide and/or an alkyl-substituted fatty acid monoamide in an amount of 0.1 to 5 wt. % based on the whole fibers.

Polylactic acid fiber yarn package, and textile products

The present invention provides a nanoporous fiber being substantially free from coarse pores and having homogeneously dispersed nanopores, unlike conventional porous fibers. A porous fiber has pores each having a diameter of 100 nm or less, in which the area ratio of pores each having a diameter of 200 nm or more to the total cross section of the fiber is 1.5% or less, and the pores are unconnected pores, or a porous fiber has pores each having a diameter of 100 nm or less, in which the area ratio of pores each having a diameter of 200 nm or more to the total cross section of the fiber is 1.5% or less, the pores are connected pores, and the fiber has a strength of 1.0 cN/dtex or more.

Growing community of inventors

Otsu, Japan

Shuichi Nonaka