PREPARING INORGANIC FIBRES

• Main Authors: KATUNOSIN ISOGAI, AKIHISA SHIRASAKA, MITSUO YAMASHITA, ICHIRO NAGASHIMA
• Format: Patent
• Language: English
• Published: 29.08.1985
• Edition: 4
• Subjects: APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS; METALLURGY; NATURAL OR ARTIFICIAL THREADS OR FIBRES; REFRACTORIES; SLAG; SPINNING; TEXTILES; TREATMENT OF NATURAL STONE

A process for the production of continuous inorganic fibers is disclosed which comprises causing a spinning dope composed of a water-soluble organic polymer, a water-soluble inorganic salt capable of forming a refractory inorganic oxide, additives, and water and adjusted to a viscosity of 200 to 2000 poises at 20 DEG C. to be dry spun by the use of a spinning nozzle containing a plurality of spinnerets each provided on the spinning dope outlet side of a nozzle plate with a protuberance having a wall thickness of not more than 0.5 mm at the tip thereof and subjecting the spun threads of the spinning dope to a thermal treatment. An apparatus for working the process is also disclosed which is provided with a spinning nozzle having a plurality of spinnerets bored through a nozzle plate and severally through protuberances formed on the spinning dope outlet side of the nozzle plate in such a manner that the walls of the protuberances surrounding the spinnerets have a thickness of not more than 0.5 mm at the tips of the protuberances and the spinnerets so piercing the protuberances are radially constricted on the spinning dope outlet side.