Kureha Kagaku Kogyo Kabushiki Kaisha

Kureha Gosen Kabushiki Kaisha

Kureha Gosen Co., Ltd

Kureha Kagaku Kogyo Kabushiki

Hisaaki Ueba

Masaaki Nakamura

Yosio Sunaga

Kazuaki Ohashi

Ken Fukuda

Tosio Nagasima

Yoshio Sunaga

Disclosure describes ball-like structures formed from bundled, crimped fibers rounded around a central portion thereof as a core, the core being formed with a molten-fused structure and having the following stipulations:

Ball-like structures and contacting materials for wastewater-treatment

Core materials for strings for musical instruments of a twist of two or more multifilaments composed of a vinylidene fluoride resin. The multifilament core has a diameter of 0.1 to 5 mm, an elongation of 10 to 50%, a tensile strength of at least 30 kg/mm.sup.2, a creep elongation of at most 15% and a Young's modulus of at least 200 kg/mm.sup.2. The multifilament is made of monofilaments each having a diameter of 1 to 300 .mu.m, a dispersion diameter of at most 20%/m, a specific gravity of at least 1.6, an inherent viscosity of 0.85 to 1.6 dl/g, an apparent viscosity of 12,000 to 100,000 poise and a birefringence of 30.times.10.sup.-3. Strings for violins, cellos and the like are made by tightly wrapping the core with a metal string.

Core material of string for instruments and string for instruments using

A string for a musical instrument consisting of a monofilament made of a resin of vinylidene fluoride and having the following characteristics which give good clearness of sound, good sharpness of sound and good spread of sound:

String for a musical instrument

Disclosed herein is a contact material for treating sewage, comprising a braid which is made of synthetic fibers and has loop piles, the weight of the synthetic fibers forming the loop piles being from 40 to 90% by weight of the synthetic fibers of the whole body of the braid.

Contact material for treating sewage of braided pile material

A process for manufacturing a string construction having a core thread and a network thread around them by extruding thread-like molten resin streams from an extruding apparatus in which an inner spinneret formed with grooves at the outer circumferential surface is rotatably mounted to an outer spinneret formed with grooves at the inner circumferential surface, and the outer circumferential surface and the inner circumferential surface are slidingly contacted to each other.

Apparatus for manufacturing a string construction

A gut having a novel structure made of a thermoplastic resin and a method of producing the same.

A string construction for athletic rackets which can be frictionally engaged with a tennis ball or a badminton shuttlecock very well upon hitting it and which can be uniformly stretched on the athletic racket frame without being twisted, comprises a string-like core made of thermoplastic resin material and a tubular netlike structure made of thermoplastic resin material, the tubular netlike structure netting over and being secured to an outer circumference of the core, wherein the netlike structure includes a plurality of thread-like members forming a plurality of nodes at intersections thereof, all the thread-like members forming each node being integral with each other at each node, and projecting from the outer circumference of the core to a height substantially equal to each other at each node.

Growing community of inventors

Mibu, Japan

Hisaaki Ueba