CS237910B1 - Method for heating and preparing synthetic fiber bundles - Google Patents

Abstract

The method solves the heating and preparation of a bundle of synthetic fibers before the technological operation of skeining on lines for drawing and textile finishing. Before skeining, the bundle of fibers is guided through a preparation heating bath in which a tempered preparation solution heated to a temperature of 40 to 95 degrees Celsius, preferably 70 to 90 °C, circulates. In this way, in one operation, the bundle of fibers is heated before skeining for the purpose of plasticization and at the same time the preparation solution is applied.

Description

The invention solves heating and preparation of a bundle of synthetic fibers prior to a technological twisting operation on the drawing and textile treatment lines so that it is heated by a tempered preparation solution.

A steaming chamber is presently placed on the drawing and textile treatment line between the alignment rollers and the curling machine in order to heat the passing fiber bundle so that in the plasticized state the curved characteristics are desired to be produced. The steam chamber is supplied with superheated steam, which partially condenses on the bundle of passing fibers. This has a negative effect on the uniformity of the amount of preparation on the fiber and causes dilution of the preparation solutions to be squeezed by the machine, especially when the vapor pressure fluctuates. Uneven vapor condensation on the fiber bundle is a major cause of the unevenness of the amount of preparation on the fiber, mainly in the direction of the fiber bundle movement. These unevennesses adversely affect the textile processing of some synthetic fiber assortments.

These drawbacks are overcome by the solution according to the invention, the principle of which is that the synthetic fiber bundle is heated by an aqueous solution preparation in a heating bath at a concentration of 0.1 to 10% by weight. % and a temperature of 40 to 95 ° C, preferably 70 to 90 ° C. The length of the bath is chosen such that the temperature difference between the solution and the fiber surface temperature is less than 10 ° C.

The advantage of the proposed solution compared to the present method is an evenly shaped bundle of fibers. This results in a uniform formation of curved fiber characteristics and high uniformity in the amount of preparation applied to the fiber, which cannot be achieved in the present manner. The dilution of the preparation solutions does not occur and the creased preparation solution can be returned without problems from the machine to be reused.

For less demanding fiber assortments in terms of processability, this device can be used for drawing and textile treatment as the only way to apply the preparation solution to the fiber. When combined with other preparation equipment in the line, it fulfills this function by heating and homogenizing. Due to the more uniform amount of preparation on the fiber and the more uniform arc characteristics, the processing properties of the fibers in the textile industry are improved.

He did

The preparation solution was heated in the reservoir by heating elements and the temperature was controlled by a thermometer. The reservoir was equipped with an overflow and inlet of the preparation solution and also with a drainage of the squeezed solution from the turning machine. At the inlet of the fiber bundle from the reservoir, the preparation solution was fed via a shut-off and throttle valve to a heating bath, which was equipped with gates and overflows in order to control the level. The crushed preparation solution flowed directly back into the reservoir. To a 3% non-ionic preparation solution. % Foamer added. The bath temperature was 80 ° C and the surface temperature of the fiber bundle when leaving the heating bath was 72-74 ° C. A fiber bundle having a moisture content of 0.2 wt. % to which no preparation solution was applied in previous operations.

Example 2

A 60 ktex polyester fiber bundle was prepared after stretching and fixation on heating rollers by spraying with a solution of a mixture of non-ionic and amphoteric products at a concentration of 2.5 wt. %. After squeezing and associating the fiber bundle, it was passed through a heating bath similar to Example 1, where the solution was of the same composition as in the shower but at a concentration of 3.0 wt. % and a temperature of 90 ° C. After bending, drying and fixing it was laid in the shape of a cable for processing on a shear converter. The processing achieved good results in terms of performance and quality of produced yarns.

Claims (1)

A method of heating and preparing a bundle of synthetic fibers by passing them through an aqueous solution of surfactants on the drawing and textile treatment lines, characterized in that before spinning the fiber strand is heated with an aqueous solution having a concentration of 0.1 to 10 wt. % and a temperature of 40 to 95 ^° C, for example 70 ° to 90 ° C, wherein the temperature difference between the solution and the fiber surface temperature is less than 10 ° C.