SU761430A1 - Method of producing superfine fiber from melts with increased melting point - Google Patents

Description

The invention relates to methods for the production of fibers from molten mineral masses and is intended to obtain fibers with high temperature resistance.

A similar method is known, in which the melt is fed to a spinnered feeder and is forced through small-diameter spinnerets with subsequent blowing of the melt jets by the flow of gaseous energy carrier [1]. Yu

With the known method, large deforming loads occur during the formation of melt jets, which adversely affects the quality of the fiber.

To reduce the magnitude of the deforming loads in the proposed method, the melt is forced through the dies by creating an overpressure in the spunbond feeder, in particular, by the impact of melted air on the melt.

FIG. 1 and 2 show devices for carrying out the method; in fig. 3 is a diagram of the continuous supply of melt to wave-forming devices. 25

The device contains a pipeline - feeder feed 1 melt, having shut-off

elements 2, die plate 3, burners

heating 4 feeders, blow-down burners 5, cooled wall 6, receiving diffuser 30

7 for fiber and shut-off elements - taps 8 on the compressed air supply line.

The melt from the spinnered feeder 3, which has spinnerets of small diameter (0.2-0.8 mm), is fed under the excess pressure created by the supply of compressed air through the pipeline 1. For the continuous supply of the melt there are two pipelines 1, and the feed for each of them is carried out alternately by switching the closure elements 2 in the melt supply line and the locking elements 8 in the compressed air supply line (see FIG. 3).

The melt streams obtained have a small diameter and flow out at an elevated speed (up to 1.5-6 m / s), depending on the magnitude of the generated overpressure and melt viscosity. They are picked up by a high-speed flow of energy - a product of combustion coming out of the burners of the blow-up 5. Then, under the influence of the energy of the flow, the melt streams are converted into a super-thin fiber entering the fiber deposition chamber through the diffuser 7.

The method can be carried out on installations of both horizontal (see Fig. 1) and vertical (see Fig. 2) inflation.

761430

Claims (2)

Claim 1. A method of producing supertonic fibers from melts with an elevated melting point, at which the melt is fed to a spinner feeder and forced through small-diameter spinnerets with subsequent blowing of jets of melt by a flow of gaseous energy carrier, in order to reduce the amount of deforming loads jet melt formation, sold ....... 4 the melt is poured through the fillers by creating an overpressure in the spun-down feeder 2. The method according to π. 1, characterized by -5 in that excess pressure is created by exposure to the melt with a stream of compressed air.