METHOD FOR PRODUCTION OF FIBROUS CANVAS OF TERMOSOFTENING PLASTIC MATERIAL AND INSTALLATION FOR ITS REALIZATION Russian patent published in 2004 - IPC

FIELD: textile production. SUBSTANCE: the method consists in fusion of polymer to the operating temperature, formation of a melt film of an equal thickness around the edges of the rotary reactor installed vertically in a protective chamber and made in the form of a cylinder with an expanding taper part at the reactor outlet. A spinneret with equal flow ducts is installed inside the reactor before the taper part. Formation of the melt film into a fiber is accomplished by separation of the film by the flow equal ducts of the spinneret into separate equal stream-lines, which then acquire kinetic energy due to rotation of taper part of the reactor, and stretch into a fiber with the taper part of the reactor at a simultaneous influence of the formed air flow. A mass of fibers is formed from the obtained fibers into a fibrous canvas on the receiving conveyer. The installation of production of fibrous canvas from a termosoftening plastic material includes an extruder, branch pipe for feeding the melt from the extruder, protective chamber with a rotary reactor vertically installed in it and a motor of its drive, annular hollow duct, receiving conveyer and a rectangular slotted air duct installed under it, filter for cleaning of waste air, exhaust and forced-draught fans. The spinneret is positioned inside the reactor on the same shaft, the outer part of the spinneret is protected by a heat-insulating screen. The installation has a feeding conveyer actuated by a drive with a receiving conveyer. The latter is installed for adjustment in height. The protective chamber is made with double walls filled with heat-insulating material. EFFECT: provided production of canvas of different thickness and width, enhanced capacity of the installation and enhanced reliability of operation. 20 cl, 3 dwg