JPH0146602B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing composite raw silk in a reeling process. Conventional methods of combining raw silk and chemical fibers to obtain a composite yarn that overcomes the disadvantages of raw silk have been proposed, for example, in Japanese Patent Application Laid-open No. 183409/1983. However, simply combining chemical fibers and raw silk causes the disadvantage that the chemical fibers shrink during the scouring process due to the difference in the degree of shrinkage of the two yarns, causing the chemical fibers and raw silk to separate as shown in Figure 6. The purpose of the present invention is to provide a method for producing composite raw silk in a reeling process that eliminates such inconveniences. There,
Immediately before compounding the chemical fibers with raw silk, the chemical fibers are immersed in a hot water bath at or near the boiling point in a tension-free state to shrink, and then compounded with raw silk. An example of implementing the present invention will be explained with reference to the attached drawings.
In the drawings, reference numeral 1 indicates a yarn reeling device, and the yarn reeling device 1 includes a yarn reeling tank 2, a welding device 3 and a welding device 4 above the reeling tank 2,
The raw silk a that has been welded in the welding device 3 is collected in the welding device 4, and then passed through the kennel section 7 formed between the drum wheels 5 and 6 to be temporarily tied, and then passed through the fineness sensor 8. It is wound up on the small frame 9. This configuration is not particularly different from the conventionally known yarn reeling device 1, and further includes a yarn threading pipe 10 that passes through the bottom of the yarn reeling tank 2 and faces directly below the splicer 3. The point that the chemical fiber is made to face the inside of the yarn being reeled through the yarn, and is combined with the raw silk a and wound around the small frame 9 is different from that disclosed in JP-A-57-183409. There is nothing special that has changed. In such a case, the present invention provides a hot water tank 11 at or near the boiling point in the lower part of the reeling tank 1, and draws out the thread wound around the bobbin 12 from the boiling point to empty the inside of the hot water tank 11. After being moved under tension and contracted, it was introduced into the threading pipe 10. To explain this in detail, the hot water tank 11 is relatively long, a steam pipe 13 is arranged along its length, and a large number of spouts 13 are provided on the upper surface of the steam pipe 13.
a, the chemical fibers are caused to meander by the movement of the hot water generated by the steam ejected from the spout 13a, and the chemical fibers are heat-shrinked with almost no tension applied thereto. In the drawing, reference numeral 14 indicates a guide roll that prevents the chemical fibers b from floating up. In the case shown in FIG. 1, the threading pipe 10 is extended to the hot water tank 11 so that the threading is passed through the threading pipe 10 and heat treatment is also performed inside the threading pipe 10. However, as shown in FIG. 4, a tension device 15 may be provided between the hot water tank 11 and the reeling tank 2 to apply a slight tension, for example, several grams, if necessary. In the illustrated example, an arc-shaped water flow guide plate 16 and a hot water supply pipe 17 are provided in the reeling tank 2, thereby generating a gentle circulating flow in the reeling tank 2 to collect the cocoons c. The yarn was reeled by gently rotating the device 4 at the center. Next, a case will be described in which a large number of polyester fibers are aligned and combined into raw silk using this apparatus.
When the chemical fibers wound around the bobbin 12 are transferred in a tension-free state in the hot water tank 11, the chemical fibers b shrink, and when they pass through the cord collector 4 in this state, the raw silk a is wrapped around the outer periphery of the chemical fibers b. The small frame 9 is combined into the attached state and given temporary tension in the kennel section 7.
These processes are not completely different from traditional yarn reeling. When chemical fiber B and raw silk a are combined in such a process, when the combined yarn is twisted and then treated with hot water for scouring, the degree of shrinkage of raw silk a and chemical fiber B is determined. By doing the same, both yarns a and b can be prevented from separating, and the state shown in FIG. 5 can be maintained. The temperature of the boiling water tank 11 and the processing time suitable for this were determined by the tests shown in the table below.
It turned out that it was necessary to treat it with boiling water for more than a second.

[Table] For example, in the case of the bobbin disclosed in JP-A No. 57-183409, which is immersed in a hot water tank, the thickness of the bobbin remains 3 mm even after being immersed in hot water at 50°C for 1 hour. Even after being immersed in hot water at 96°C for 1 hour, the shrinkage was only 20 mm/m, and sufficient shrinkage was not achieved. As described above, according to the present invention, immediately before compounding the chemical fiber with raw silk, the chemical fiber is immersed in a hot water tank at or near the boiling point in a tension-free state to shrink, and then
By combining it with raw silk, the chemical fibers can be sufficiently shrunk, which prevents the chemical fibers and raw silk from separating during the scouring process, making it possible to obtain an extremely good composite yarn. effective.

[Brief explanation of drawings]

In the drawings, FIG. 1 is a cross-sectional side view of one example of the apparatus for implementing the present invention, FIG. 2 is a plan view taken along the line -, FIG. 3 is a side view taken along the line - - of FIG. 1, and FIG. 4 is a side view of another embodiment. FIG. 5 is an enlarged view of a composite yarn obtained by the method of the present invention, and FIG. 6 is an enlarged view of a conventional composite yarn. a... Raw silk, b... Chemical fiber, 11... Hot water tank.

Claims (1)

[Claims] 1. When reeling a composite of raw silk and polyester fibers or other chemical fibers, the chemical fibers are immersed in a hot water bath at or near the boiling point in a tension-free state immediately before being composited with the raw silk to shrink. A method for producing composite raw silk in a silk reeling process, characterized in that the composite raw silk is composited with raw silk after the raw silk has been dried.