JPH03227446A - Manufacture of fleece consisting of thermoplastic plastic made spinning fiber - Google Patents

Abstract

PURPOSE: To readily obtain a fleece of various characteristics adaptable to various uses by supplying thermoplastic beltlike pieces different in chemical and physical properties to a spinning nozzle, dividing the extruded material by spray to form a spun yarn and piling the spun yarn of plural substances. CONSTITUTION: A thermoplastic plastic is supplied to a nozzle head having at least one spinning nozzle, introduced into a spinning nozzle as a beltlike pieces, which are divided by heated air to give a spun yarn. The spun yarn is cooled behind a spinning head. In the operation or after that, when the spun yarn is piled on a conveyor belt to produce a fleece, beltlike pieces composed of two or more layers made of chemically and/or physically different thermoplastic plastics different, supplied to the spinning nozzle and divided by spray to give the spun yarn. The spun yarn of plural substances are piled to give the objective fleece.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The invention provides a nozzle head with at least one spinning nozzle, which is supplied with a thermoplastic plastic, which enters the spinning nozzle in the form of a strip, and which disaggregating the pieces with heated air to form spun fibers and cooling the spun fibers after the spinning head and then or thereafter depositing the spun fibers on a conveyor belt to form a fleece and drawing it off as a fleece by the conveyor belt; The present invention relates to a method for producing fleece made of spun fibers made of thermoplastic plastic.

It is clear that such spinning heads most often have several spinning nozzles. Spun fibers are also called microfibers.

2. Prior Art In the known method which forms the basis of the present invention (company publication r.
Melt Prone Information Reifenheusel J May 18, 1989), a strip of chemically and physically as uniform as possible plastic is fed to a spinning nozzle.

In that respect, fleece consists of single substance spun fibres.

On the other hand, of course, it is well known to form or arrange different fleeces of single-material spun fibers one above the other and to combine them together. The individual spun fibers only have properties determined by the plastic from which they are made. In this respect, it is not possible to set the properties of the finished fleece in a variety of ways, and therefore it is not possible to configure it to suit various uses.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a method for producing fleeces made from spun fibers of thermoplastic plastics, which allows the production of fleeces with widely different properties.

DESCRIPTION OF THE INVENTION In order to solve this problem, the present invention shows the following regarding the method. A strip consisting of at least two layers of chemically and/or physically different thermoplastic plastics is fed to a spinning nozzle and is broken up by blowing into spun fibers, and these multi-material spun fibers are The fibers are piled up as fleece.

According to the invention, a melt of thermoplastic is spun, which melt consists of at least two layers of physically and/or chemically different plastics. Corresponding strips are made into fibers by spraying in the usual manner.

In that case heated and/or cooled air streams can be used. In particular, a pressurized heated air stream can be used that expands so strongly that the temperature drop obtained by expansion on exiting the nozzle is sufficient for cooling.

The properties of plastics can be combined by combining plastics. The fleece can thereby be specially configured to be soft, hard, strong or otherwise.

When combining thermoplastics that do not stick together, the method according to the invention makes it possible to separate the molten fibers emerging from the spinning nozzle into individual components. In this way extremely thin fibrils can be formed. In this way, fibers that are much finer than normal can be produced. For example, using a conventional spinning nozzle for eight layers of plastic that do not stick to each other and a diameter reduces the thickness of the individual fibers to 178. This is extremely important for the properties of microfiber products and makes it possible to set special physical parameters that were hitherto unattainable. In particular, the filter action, absorption action and heat insulation action can be significantly improved.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In detail, there are many possibilities for variations and improvements within the scope of the invention. In general, a plurality of spinning nozzles arranged next to each other with a circular nozzle cross section are used, and a strip of at least two layers of thermoplastic plastic is distributed onto these spinning nozzles. An advantageous configuration of the invention has the following characteristics. At least one wide-slit spinning nozzle is used, from which a multilayer thermoplastic film is discharged, the film being separated by spraying. However, it is also possible to use one or more spinning nozzles with a sawtooth-shaped internal nozzle wall. It is clear that the structure of this formation is always smaller than the geometry of the nozzle opening. In the case of a configuration with a wide slit spinning nozzle, the thickness of the spun fibers can be controlled by the gap width of the wide slit spinning nozzle.

Furthermore, the air velocity and/or air volume are set parameters. It is clear that this is the case.

Claims (5)

[Claims] (1) A nozzle head having at least one spinning nozzle is supplied with a thermoplastic plastic, the plastic is introduced into the spinning nozzle as a strip, the strip is broken up by heated air to form a spun fiber, and the plastic is spun into a spun fiber. In a process for producing a fleece consisting of spun fibers of thermoplastic plastic, in which the fibers are cooled after a spinning head and the spun fibers are then or subsequently deposited on a conveyor belt to form a fleece and drawn off as a fleece by the conveyor belt. , feeding a strip consisting of at least two layers of chemically and/or physically different thermoplastics into a spinning nozzle and disintegrating them by blowing into spun fibers; and A method for producing a fleece made of spun fibers made of thermoplastic plastic, characterized by depositing the fibers as a fleece. 2. The process as claimed in claim 1, wherein a plurality of spinning nozzles arranged in a row with a circular nozzle cross section are used and a strip of at least two layers of thermoplastic is distributed to these spinning nozzles. 3. The method of claim 1, wherein at least one wide slit spinning nozzle is used, the multilayer thermoplastic film is ejected from the wide slit spinning nozzle, and the film is separated by blowing. (4) One or more spinning nozzles are used, and the nozzle inner walls of these spinning nozzles are formed in a sawtooth shape.
A method according to one of claims 1 to 3. (5) The method according to claim 3 or 4, wherein the thickness of the spun fibers is controlled by the gap width of the wide slit spinning nozzle.