SU578375A1 - Method of preparing sliver of woolen fibres at spinning - Google Patents

Description

one

The invention relates to the field of textile production and relates to the fabrication of a wool fiber ribbon in a combed yarn system.

There is a method of preparing a wool fiber ribbon in a combed wool spinning system by carding hair; 1-1a and the processing of the obtained semi-finished product at several transitions of tape machines of the carding and roving sections.

In modern technology of combed wool, in order to reduce the breakage of fibers, reduce their electrification and increase the yield of yarn from raw materials, and reduce breakage in spraying, wool is moistened (emulsified) before carding, as well as oiling the tape at the first transition of ribbon machines roving department.

Aqueous oleic acid emulsion is used for moistening, and recently an aqueous emulsion of the preparation Slavosol MKS-6, which is a condensate of fatty acids, is used.

Despite the fact that the aforementioned goals, due to the use of sizing emulsions made of oleic acid or Slavosol, are to some extent achieved, the loss of raw materials at transitions of the first production remains high and reaches 25% or more.

Nowadays, a non-spinning method of spinning, in particular, a pneumomechanical method, is coming to replace ring spinning. It has been established that the process of non-mechanical mechanical threading proceeds the better, the lower the content in the wool tape.

The purpose of the invention is to increase the yield of leites in the combed yarn system by reducing waste, and preparing a combed ribbon with multiple contents for pneumatic spinning. This goal is achieved by pre-moistening the fiber with preheated water in an amount of 25-30% by weight of the fiber, and the semi-finished product is treated with an aqueous solution of an antistatic preparation in an amount of 2-3% by weight of the semi-finished product. In this case, the fiber is removed by water heated to 30-35 C.

For rye fiberglass wool fiber is subjected to carding and processing at several transitions of tape machines and roving frames.

Before carding, the fiber is moistened with clean, heated to 30–35 ° Bo ;;, in the amount of 25–30% by weight of wool, and passing through the first belt machine of the carding department, the semi-finished product is treated with water

pacTBOpoivi antistatic drug OS-20 in the amount of 2-3% by weight of the semifinished product, and on the first transfer of the roving frame tape machines, the tape is lubricated with slavosol emulsion.

The damage and breakage of the fibers in the carding process occurs under the action of force chesape. The magnitude of the latter is determined by the magnitude of the resistance forces of the shreds of the fibrous material to the dragging and combing of the moving head working units. Resistance forces are directly dependent on the friction coefficient of the fibers and their stiffness. Theoretical analysis shows that the forces of combing wool when moistened with clean water should decrease more sharply than when moistened with an emulsion of oil. The experiment fully confirmed this conclusion: in the first case, the forces decreased by 38% (compared to dry wool), and in the second - only by 20%. This is explained by a more dramatic drop in fiber stiffness in the first case.

In close correlation with the change in the strength of the combing, there is a breakage of filament: in the first case, the shortening of the average fiber length was 15.5%, in the second - 24%.

Further studies showed that the electrified fiber on a carding machine when wetted with water is less than when wetted with emulsion (the electrostatic field intensity is 258 and 750 volts pa 1 cm, respectively). And finally, the straightening of fibers in the carding tape is 6% more in the first case than in the second. Taken together, this gives a significant reduction: waste both in carding itself and in subsequent combing.

Thus, one of the differences of the proposed method from the existing one is to replace the moistening of the wool before carding with a sizing emulsion by moistening with clean water heated to 30-35 ° C.

However, despite the fact that the process of carding wool, moistened with water, proceeds better than using a sizing emulsion, it cannot be used under production conditions. This is explained by the fact that the wool on the tape after carding on subsequent transitions dries out rather quickly and is highly electrified (especially after combing), which leads to ignition, windings and breaks of the tape.

In order to carry out the subsequent operations, it is necessary to prepare the semi-finished product obtained from the wool moistened with clean water before carding, at the first transition of the tape machines of the carding department with an aqueous solution of the antistatic preparation OS-20 in an amount of 2-3% to the weight of the semi-finished product.

The main advantage of the proposed method lies in the substantial saving of expensive raw material — wool. Under the conditions of the production experiment, the reduction of waste ranged from 2.7% to 8% of the weight of the incoming raw materials.

Ф О р. М у л and inventions

Claims (2)

1. The method of preparing wool fiber tape in a spinning process, for example, in a combed system, by carding the fiber with pre-wetting and processing the obtained semi-finished product at several transitions of carding and roving gear machines and oiling the tape at the first transition of lepting machines of the roving department, characterized in that, in order to increase the yield of the tape, the fiber is pre-moistened with heated water in an amount of 25-30% by weight of the fiber, and on the first transfer of tape machines itching Nogo card semifinished treated aqueous antistatic formulation in an amount of 2-3% by weight of the semifinished product. 2. A method according to claim 1, characterized in that the fiber is moistened with water heated to 30-35 C.