The method of forming untwisted rovings from flax fiber

 

(57) Abstract:

The method can be used in spinning textile industry for the formation of untwisted rovings from flax fibers and improves the quality of Rove by increasing the strength of the product before it is wound. According to the method of coming out of the exhaust device Micco moistened with an aqueous solution of soda ash Na2CO3concentration of from 10 to 35 g/l, and then by her seal form the rovings and wound rovings formed on bobbins with cross coils.

The invention relates to spinning textile industry and relates to a method of forming untwisted rovings from flax fiber.

In the process of yarn production from natural fibers is formed of a fibrous product in the form of a tape having a constant weight (linear density). To produce yarn this semi-finished product goes through several stages of drawing, with its linear density decreases. The product of the linear density of 0.25-2.0 CTCs in the form of rovings is formed using a rotating flyer, one of the branches which there is a channel for the passage of rovings (TRUEVAL N. And. and what of the rest are limited due to the deformation of its branches under the action of centrifugal forces, which leads to the speed limit release and decreased performance roving equipment.

This drawback is absent in the known method of forming untwisted rovings, according to which Micco condense the reel and dipped in the water bath (EN 2168569 C1, 10.06.2001).

However, it is extremely difficult to dose received by sliver water.

The closest analogue of the claimed method is a known method of forming untwisted rovings from flax fibers, according to which, coming out of the exhaust device Micco moisten in a tubular channel water through the seals using a reel form the rovings and wound rovings formed on bobbins with cross Hanks (EN 2164567 C1, 27.03.2001).

The disadvantages of this method are that at low linear density generated Rove product obtained has an insufficient strength, which leads to the emergence of uncontrolled extraction Rove with the winding reel, arising in the winding mechanism of efforts, resulting in forming the roving is of poor quality.

The objective of the invention is to provide a method of forming untwisted rovings of crystals by increasing the strength of the product before it is wound.

This technical result in the formation method untwisted rovings from flax fibers, according to which, coming out of the exhaust device Micco moisten in a tubular channel water through the seals using a reel form the rovings and wound rovings formed on bobbins with cross Hanks, is achieved by the fact that micko moistened with an aqueous solution of soda ash Na2CO3concentration of from 10 to 35 g/L.

Strength Rove increase due to the increase in the coefficient of surface tension of wetting.

The increase in the coefficient of surface tension of a liquid can be achieved by adding to the water a negative surface-active substances (surfactants), such as mineral salts, for example sodium carbonate PA2CO3while the concentration of soda should be from 5 to 50 g/l (ABRAMSON, A. A. and other Surface phenomena and surfactants. - Leningrad: Khimiya, 1984).

According to tests, the increase in strength when wetted sliver soda ash solution depends on the concentration of the solution. The effect occurs when the solution concentration 10 g/l, the increase in strength as compared with the hydration water structure is t 20% of the strength, achieved when watered. With further increase in the solution concentration increased strength slows down, and when the concentration of the solution more than 35 g/l increase in strength is practically not observed. In this regard, it is appropriate wetting sliver in the formation of wet untwisted rovings soda ash solution with a concentration of from 10 to 30 g/L.

After running out rovings subjected to chemical treatment in aqueous solutions. According to one of the most common flowsheet alkaline cooking Rove at the initial stage of rovings is boiled in a solution of caustic soda concentration of 26 g/l (LAZAREV, S. E. and others Spinning flax with cooking Rove. - M: Light industry, 1966).

The use of a solution of this concentration to soak in the formation Rove allows you to increase the strength of rovings 18%. Because further processing is carried out in a solution of the same concentration, it is possible not to undertake any measures to remove surfactants from Rove before chemical treatment.

The use of this method of forming untwisted rovings from flax fiber allows you to extend the range of received numbers ravnic the tx2">

The method of forming untwisted rovings from flax fibers, according to which, coming out of the exhaust device Micco moistened by her seal form the rovings and wound rovings formed on bobbins with cross coils, characterized in that micko moistened with an aqueous solution of soda ash Na2CO3concentration of from 10 to 35 g/L.

 

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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.

6 cl, 7 dwg

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