How flax yarn wet spinning

 

(57) Abstract:

Usage: textile industry, obtaining flax yarn wet spinning. The inventive flax fiber after scutching machine cut into segments of length 150 - 400 mm and subjected to a cut fiber enhancing the treatment during which sequentially washed with water, acting on the fiber for 20 to 60 seconds steam under a pressure of 10 to 15 bar with its subsequent discharge to atmospheric pressure, washed with fiber and dried. Of the fibers form the tape is subjected to wet spinning, in which the elongation with hood, 50 - 140. 4 C.p. f-crystals.

The invention relates to the textile industry and relates to a method of flax yarn wet spinning.

A method of obtaining flax yarn wet spinning, according to which flax fiber after scutching machine cut into pieces and subjected to a cut fiber enhancing processing with the subsequent formation of fibrous tape and wet spinning.

Obtained by this method, the yarn has a specific structure due to the presence of residual organic adhesives and the organic adhesives (pectins, hemicellulose, lignins), which gives the yarn a better grip, has the main disadvantage that is to increase its rigidity. In the linen yarn wet spun does not have sufficient flexibility for use in hosiery-knitting production, knitting machines, which greatly limits its technological capabilities.

Objective of the claimed invention is a method of flax yarn wet spinning, providing technical result consists in giving the yarn sufficient for use in hosiery-knitting production flexibility while maintaining its appearance and structure of flax yarn wet spinning.

This technical result in the way of flax yarn wet spinning, according to which flax fiber after scutching machine cut into pieces and subjected to a cut fiber enhancing processing with the subsequent formation of fibrous tape and her wet spinning, is achieved by the fact that the fibers are cut into segments of length 150 400 mm, while improving the processing of cut fibers successively impregnated with water, affect them for 20 is tons of them thus formation of fibrous tape carry on the preparatory machines for any fibers, such as flax, wool or cotton.

In the wet spinning of fibrous tape is carried out by pulling with hood, 50 140, followed by a twisting of the stretched tape yarn.

As the fibers after scutching use scutching waste that is recycled in a roving machine carding machine.

The wet spinning of fibrous tape is subjected to a preliminary alkaline treatment, mainly in the sodium carbonate solution.

The wet spinning of fibrous tape is subjected to bleaching, mainly with the use of hydrogen peroxide.

This method can significantly reduce the amount of organic yarn adhesives, but at the same time retain their number, which is high enough for the wet spinning of flax fibers and retain the natural appearance of the yarn. Furthermore, the combination of the specified steam treatment under pressure and wet spinning creates in the resulting yarn is very good regularity of the distribution of residual adhesives. It is this regularity and fewer glue the config appearance and structure.

On the other hand, thanks to cutting into segments ranging in length from 150 to 400 mm can be carried out forming tape machines not only for flax, and wool and cotton fibers.

Thus, as a result of the invention method, it becomes possible to obtain linen yarn wet spun in a simpler and less expensive operations training.

Mostly wet spinning is performed with the hood 50-140, which eliminates the stage of formation of the fibrous ribbon of rovings without making a negative impact on the smoothness of the yarn.

Mainly, mainly, in the wet spinning of fibrous tape is subjected to alkaline pre-treatment, which allows to improve the sliding of elementary fibers by pulling and increases the homogeneity of the distribution of adhesives.

Mainly, mainly, in the wet spinning of fibrous tape is subjected to the operation of bleaching, for example, by using hydrogen peroxide.

An example of the method.

Source material are scutching residues, resulting from the breaking nedonoshennogo flax. For example, the authorized flax, nedonoshennyj flax contains always more side materials, as adhesives, connecting fibers between them had not Margaritaville (disbanded) under the action of bacteriological agents during soaking.

These scutching wastes are pre-treated on roving machine, carding machine, which, in addition, provides them in the form of a tape. This tape is cut to a length of 300 mm

Thus, the cut fiber is introduced into the reactor, where they are impregnated with pure water, and then subjected to hydrolysis treatment with water vapor under a pressure of 15 bar for 40 seconds; after this time the evacuation hole of the reactor is opened, which causes a sharp discharge due to the transition from the pressure of 15 bar to atmospheric pressure and, therefore, leads to the release through the hole fibers into a VAT containing slightly alkaline water in which the fibers are washed and then rinsed.

From the thus treated flax fibers after drying form the tape 4 g/m by successive passing through the machine: roving carding machine, duplicate handling machine GN4, then double-spend a small carding machine, and then again through whom he formed the ribbon is 16,74 when the coefficient of variation CV, equal 5,07% it Should be noted that for raw flax fineness is characterized by a value greater than 20, indicating that the decrease in fineness of the fibers in the tape obtained in accordance with the invention.

Then the tape is exposed to a light processing for the extraction of plant resins with a solution of 2.5 g/l of sodium carbonate. The yarn is formed by extruding fiber tape in a two-band exhaust device with system load, with the balances.

The tape passes through a VAT of cold water through the ceramic guides on the input and output.

According to the described example of the method, the distance between the cylinders, the exhaust device is 80 mm for the rear area and 60 mm for the front zone, the twisting of the elongated fibers is performed with a twist 410 cu/m at a rate of production of yarn component 13 m/mm. Received the linen yarn wet spinning has metric number 23, breaking length of 17 km (CV 20 25), the elongation of from 1.6 to 1.8%

This yarn has the appearance and structure of the traditional wet spun yarn, however, compared with traditional yarn, has much more flexibility, which allows you to use the yarn on the knitting machine is 2">

The formation of fibrous tape can be performed on prep machines for any fibers, such as flax, wool or cotton. Tape over the wet spinning may undergo various treatments, such as bleaching, which will result in bleached linen yarn.

1. How flax yarn wet spinning, in which flax fiber after scutching machine cut into pieces and subjected to a cut fiber enhancing processing with the subsequent formation of fibrous tape and her wet spinning, characterized in that the fibers are cut into segments of length 150 400 mm, while improving the processing of cut fibers successively impregnated with water, affect them for 20 to 60 seconds steam under a pressure of 10 to 15 bar with its subsequent discharge to atmospheric pressure, washed with fiber and dried, thus forming a fibrous tape carry on the preparatory machines for any of the fibers, for example flax, wool or cotton.

2. The method according to p. 1, characterized in that in the wet spinning of fibrous tape is carried out by pulling with hood, 50 140, followed by a twisting of the stretched tape yarn.

3. odes, which was subjected to purification on roving machine carding machine.

4. The method according to p. 1, characterized in that the wet spinning of fibrous tape is subjected to a preliminary alkaline treatment, mainly in the sodium carbonate solution.

5. The method according to p. 1, characterized in that the wet spinning of fibrous tape is subjected to bleaching, mainly with the use of hydrogen peroxide.

 

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