Method of formation and preparing twist-free flax roving for spinning and device for its implementation

FIELD: textiles, paper.

SUBSTANCE: invention relates to the textile industry, in particular to flax spinning production, where, at the last manufacturing step, to produce flax yarn the semi-finished in the form of roving is used. The method of formation and preparing flax roving for spinning, according to which, broken thread exiting drafting device is soaked in electrochemically activated water solution with an oxidation-reduction potential from minus 1000 mV to plus 1000 mV and the acidity of 2-12 pH at the temperature of 16-40C. And the wetting is carried out directly to the cavity of the chemical reactor designed for obtaining electrochemically activated water solution.

EFFECT: invention enables to reduce the time, to reduce energy and water consumption for chemical treatment of roving, refuse chemicals which can lead to lowering disposal costs resulting from chemical processing of roving, solutions.

2 cl, 2 dwg

 

The invention relates to the textile industry, in particular to flax production, where the latest technological transition, for the production of linen yarn use prefabricated in the form of rovings.

The sequence of processes of flax yarn consists of the formation of the fibrous product in the form of a tape having a constant weight (linear density), with its thinning - decreasing linear density on subsequent technological transitions. Ends the technology of preparation of fibres for spinning the formation of rovings - product with a linear density of 0.25-2.0 ktex. For winding it on the package, convenient to use for further technological transitions, rovings should have a certain strength. Along with used in industry by method of hardening Rove, otkruchivaniem, a method of obtaining flax rovings (RU # 2208070 WITH, 01.07.2001)in which to improve its strength when forming a thin beam of fibers Micco coming out of the exhaust device, moisten with water. When this occurs, the bonding technical fibres of flax pectin substances in the composition of flax fibers.

To ensure the process preobrazovaniya and stability of course of rovings subjected to chemical treatment (Lazarev S.E. and other Spinning flax with cooking ro is nice. - M: Light industry, 1966).

The purpose of this process is the weakening of ties between the elementary fibres in technical fibers. As a result of chemical processing Rove becomes possible to produce a yarn that meets the requirements of the standard in a wide range of linear densities with a stable process.

The process of chemical treatment has a number of disadvantages, which include large energy costs (4200 kJ per 1 kg of rovings), the use of chemicals, water usage, violation of the threading process, the obligatory presence of sewage treatment plants.

A known method of preparation of bast fiber materials indexes (RU # 2139374 C1, 11.12.98), in which, for breaking ties between complexes and elementary fibres used electrochemically activated (ECHO) aqueous solution with a redox potential of minus 1000 mV to + 1000 mV, with acidity 2-11 pH, at a temperature of 16-40C. the High activity of the ECHO due to the presence of unstable ions, which are absent in solutions that have reached thermodynamic equilibrium. The activity of the ECHO depends on the relaxation time, which is about a few days. Moreover, the decrease in activity occurs by the exponential law, i.e. in the first few minutes of rest the re disintegrate or come in the reaction most active ions, there is intense decrease of activity of the solution, and then at a slower pace, however, this solution lacks the most active ions. According to a known method (RU # 2139374 C1, 11.12.98) processing is subjected to short fibre flax or flax tow intended to obtain cottonin and further processing on cotton technology. Using the resulting processed product as Rove is not possible.

The prototype of the present invention in part of the way is the invention (RU # 2227824 C1, 25.02.2003), in which the sliver of flax at the exit of the exhaust device is wetted with a solution of soda ash Na2CO3with a concentration of from 10 to 35 g/l, and thus is formed rescrutiny rovings. The use of soda ash allows the process of chemical processing Rove, since its formation on roving machine. But to complete a full cycle of chemical treatment on roving machine when this method fails, because it requires high temperatures and long contact time sliver with a solution that cannot be achieved, mainly because of the high speed production of formed Rove.

A prototype of the invention in the part of the device is the invention (EN 2078737 WITH, 1994.05.26), in which the reactor for electrochemical treatment of water contains electrochemical cell made of vertical coaxially arranged rod and cylindrical electrodes, ceramic diaphragm, coaxially placed between the electrodes and dividing the interelectrode space in the electrode chamber, and a current source connected to the electrodes through the switching node. Rod has a variable cross-section and the diameter of its end parts of 0.75 of the diameter of its middle part, the middle part with a larger diameter is located at a level limited by the channels in the upper and lower dielectric heads. The disadvantage of the prototype is the lack of a Central channel designed to pass through it processed textile product, and the vertical orientation of the electrodes, the limiting position of the line of filling in the roving machine.

The technical object of the present invention is the reduced time, reduced energy and water consumption for chemical processing Rove, the rejection of the chemicals that will reduce waste resulting from chemical treatment Rove, solutions.

This goal is achieved by the fact that the roving is formed by wetting the sliver electrochemical and activated solution moreover, the processes of electrochemical activation solution and the formation of rovings combined and produced in a single device.

Figure 1 shows a flow chart of a device for implementing the proposed method of obtaining and training rovings for spinning.

Figure 2 shows the construction scheme of the reactor for the production of electrochemically activated solution and processing it flax rovings.

The proposed method of forming Rove and prepare it for spinning is the following. Sliver formed in the exhaust device roving machine, with a linear density of from 0.25 to 2.0 ktex, comes out of the exhaust pair 1 (1) of the exhaust device, passes through a hole in the Central electrode of the electrochemical reactor 2, where it is treated electrochemically activated solution (anolyte or Catolica), which is obtained by decomposition of brackish water fed to the reactor through the nozzle 3. When this occurs the destruction of the lignin in the middle lamellae of technical fibers and weakening of the ties between the elementary fibres, which provides further stable course of the process of extruding the obtained Rove in the exhaust device of the spinning machine. Not used for the processing solution catholyte or anolyte, respectively, is discharged through the nozzle 4. Move the product through the reactor is ensured by applying it to the treatment area exhaust pair 1 and output from processing zones staking pair 5. For hardening sliver in the treatment area is selected reel 6, rotating around its axis. He holds Micco spring-loaded jaws 7 and informs her of the false twist. As a result of linseed Micco electrochemically activated solution and hardening it in the treatment area by the false twist is formed Rove, suitable for processing into yarn on machines wet spun linen without additional processing.

For the implementation of the proposed method of formation and preparation for spinning flax rovings used chemical reactor (figure 2). It consists of two coaxially arranged electrodes, the inner 1 and outer 2. The electrodes are inclined, so that their axis coincided with the axis of the processed rovings. The inner electrode is a tube with a Central channel 3. In the middle part of the electrode 1 has a perforation 4, connecting the Central channel with the interelectrode space. Between the electrodes 1 and 2 is aperture 5, dividing the interelectrode space into two chambers - the anode and cathode. The cavity of the sealed chambers of the sleeves 6, 7 and 8 made of insulating material. Fittings 9 and 10 are intended to feed into the reactor, the source of NaCl. The fitting 11 is designed to drain the solution, not used for processing Rove.

The device shall operate in the following way. To the electrodes 1 and 2 is supplied with direct current, the polarity of which is selected depending on how the solution should be processed rovings. When connecting the negative pole to the inner electrode for processing will be used in the anolyte, and connecting the positive pole of the catholyte. Through the fittings 9 and 10 into the cavity of the reactor is NaCl, which under the action of electric current decomposes into anolyte and catholyte. The solution used for processing Rove derives from the interelectrode space in the channel 3 through which the moving fibrous sliver. This channel is impregnated with its corresponding solution and begins the destruction of the lignin contained in the fiber. The solution is not used for processing Rove, flows through the nozzle 11.

The solution wets Micco, due to surface tension forces of the liquid, there are the forces holding the fibers to each other. This leads to the fact that the thus formed product rovings, has a strength sufficient for its winding on the coil. Simultaneously with the formation of Rove begins cleavage complexes contained in the technical fiber, at the elementary fibers, and the breach of relations between the fibers continues in the roving wound on the spool. The choice of range of the specified parameter is in the electrochemically activated solution is determined by the requirements requirements for processed rovings, and depends on the properties of the original fiber, prepared for yarn production. It is found experimentally that with the right choice of activity solution violation of connection between the elementary fibres in technical fibers occurs within 30 minutes, after which the rovings ready for the formation of yarn on a spinning machine.

Electrochemically activated solution within three days lose their properties, into the water, which does not require special cleanup for disposal.

Implementation of the proposed method is illustrated by the following examples.

The definition of the parameter charge electrochemically activated solution to achieve the level of readiness (violation of links between the elementary fibres) Rove to the process of preobrazovaniya depends on the type of fibers used.

To achieve the goal of obtaining a semi-finished product, suitable for processing into yarn that meets the requirements of the standard, it is necessary to observe the processing modes shown in the table. In the last column of the table shows the qualitative characteristics of the drawing process rovings obtained according to the proposed method, in the exhaust device of the spinning machine, depending on the processing time. These data allow the tanawit minimum time necessary to obtain a positive effect, is 30 minutes.

Charge ECHO Rast-theft mVThe acidity of the ECHO solution pHFiber typeFlexibility, mmThe content of incrusted, %Fiber content associated with lignification, %Time processing
Ki, min
Description of the drawing process
+10002,0Very gross45-50above 3,503015Unstable
30Stable
60Stable
+7004,0Gross50-55of 3.25 to 3.516-2515Unstable
Stable
60Stable
-100011,0Medium soft55-603,00-3,2514-1615Unstable
30Stable
60Stable
-7009,0Soft50-602,75-3,0012-1415Unstable
30Stable
60Stable
-5008,0Very softMore than 60to 2.7510-1215N is stable
30Stable
60Stable

The beneficial effects of the present invention is to accelerate the formation and training of rovings for spinning and delisting bulky and expensive equipment for chemical processing Rove, the reduction of energy consumption with 4200 kJ per 1 kg Rove to 5 j/kg, ensuring environmental safety of the process due to the fact that it does not use hazardous chemical components.

1. The method of formation and preparation of flax rovings for spinning, whereby opening of the exhaust device Micco moisten the electrochemically activated aqueous solution with a redox potential of minus 1000 mV to + 1000 mV and acidity 2-12 pH at a temperature of 16-40C, characterized in that the wetting is done directly in the cavity of the chemical reactor, intended to receive the electrochemically-activated water solution.

2. The device for implementing the method according to claim 1, comprising two coaxially arranged electrodes and installed between the ceramic diaphragm, characterized in that the electrodes are inclined so that their axis coincided with the completion processed rovings, the Central electrode has a tubular shape and perforations in its middle part.



 

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FIELD: textile, paper.

SUBSTANCE: according to the method, broken thread exiting drafting device is soaked in solution, by means of its compaction, rove is formed, and formed rove is wound onto reels of cross winding, which are chemically treated and then processed into yarn. Broken thread is soaked with electrochemically activated aqueous solution with oxidation-reduction potential from minus 1000 mV to plus 1000 mV, acidity of 2-11 pH at the temperature of 16-40C, and produced rove, not earlier than in 30 minutes after the formation, is processed into yarn.

EFFECT: faster process of rove formation and preparation for spinning, reduced power inputs from 4200 kJ/kg to 3 J/kg and water consumption for chemical treatment of rove, rejection of chemical agents, which makes it possible to reduce costs of recycling coming as a result of chemical treatment of rove by solutions, and elimination of bulk and expensive equipment for chemical treatment of rove.

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FIELD: textile industry, in particular, non-circular weaving equipment, for example, weaving units.

SUBSTANCE: apparatus has shaft disposed between columns and adapted for carrying of rotary lever with rotating pressure roll, and spiral spring. Shaft is immovably fixed between flat columns attached by means of bolt-type protrusions to vertically arranged base. Spiral spring is mounted on shaft and spring ends are fixed on rotary lever and on one of columns. Shaft is made stepped and is equipped with basic end portions terminating in threaded parts. Flat columns have rectangular portions continued with bolt-type protrusions. Column arranged at the side of spring end has cylindrical opening for accommodation of rectilinear end of spring. Cylindrical recess provided in rotary lever hub aperture on its internal surface at the side of arrangement of spring is adapted for accommodation of rectilinear end of spring.

EFFECT: improved operating characteristics and operating conditions.

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FIELD: textile, paper.

SUBSTANCE: according to the method, broken thread exiting drafting device is soaked in solution, by means of its compaction, rove is formed, and formed rove is wound onto reels of cross winding, which are chemically treated and then processed into yarn. Broken thread is soaked with electrochemically activated aqueous solution with oxidation-reduction potential from minus 1000 mV to plus 1000 mV, acidity of 2-11 pH at the temperature of 16-40C, and produced rove, not earlier than in 30 minutes after the formation, is processed into yarn.

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FIELD: textiles, paper.

SUBSTANCE: invention relates to the textile industry, in particular to flax spinning production, where, at the last manufacturing step, to produce flax yarn the semi-finished in the form of roving is used. The method of formation and preparing flax roving for spinning, according to which, broken thread exiting drafting device is soaked in electrochemically activated water solution with an oxidation-reduction potential from minus 1000 mV to plus 1000 mV and the acidity of 2-12 pH at the temperature of 16-40C. And the wetting is carried out directly to the cavity of the chemical reactor designed for obtaining electrochemically activated water solution.

EFFECT: invention enables to reduce the time, to reduce energy and water consumption for chemical treatment of roving, refuse chemicals which can lead to lowering disposal costs resulting from chemical processing of roving, solutions.

2 cl, 2 dwg

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