KR101214192B1 - Process Of Short Staple Spinning For Kenaf／Cotton Fiber - Google Patents

Abstract

The present invention relates to a mixed spinning method for producing short fiber spun yarn by mixing wool fibers and cotton fibers, and the web formation in the carding process that was a problem of the short fiber spinning method due to the problem of the basic properties of the wool fibers, by the present invention, Solving the problems of sliver cutting in the softening process, roving cutting in the spinning process and trimming in the spinning process, it is possible to produce very high tensile strength, delicate, very light and soft mixed yarn / cotton spun yarn with excellent yield. It became.

Description

Process of Short Staple Spinning For Kenaf / Cotton Fiber

The present invention relates to a mixed spinning method for producing a short fiber spun yarn by mixing the yarn fibers and cotton fibers.

With the recent boom in eco-friendly organic fiber materials, KENAF (Yen horses) will be in the spotlight in the future.

Kenaf is native to Africa and India. Its stem is straight, 3 ~ 5m high, with fine hairs, with hook-like protrusions between nodes. After harvesting the fermentation, the fermented fiber is used as a substitute for hemp or jute, which is tougher, somewhat coarse, and less flexible than jute fiber. The fiber is about 22cm long and is used as a sack, fishing net, rope or paper material.

These hemp fibers are in the spotlight as "alternative fibers" that can replace cotton fibers. At the current level of technology, long fibers are harvested to produce only the level of manual industry by vertical loom.

In order to mass-produce the filament fiber, it is necessary to manufacture the yarn by short fiber spinning method using short fiber. However, the filament fiber is thick, weak in flexibility, and has low inter-fiber composition, which makes web formation impossible in carding process. In this carding process, falling into the fall has a problem of extremely low yield. In addition, in the softening process, the cutting of the sliver occurs due to the clogging of the trumpet, the roving cutting in the spinning process, the trimming occurs in the square process.

Accordingly, in the present invention, it is a technical task to solve the problem of the short fiber spinning method of the yarn fibers to provide a mixed yarn of very high and delicate, very light and soft yarns / cotton fibers with excellent yield.

According to the present invention, after refining and drying the yam stem, the shell is split into long fibers, and then the yam fibers are prepared to be cut to have a length of 45-50 mm,

Cotton fiber preparation process to separate and prepare cotton fibers,

Honta cotton process of forming a blend wrap using each wrap after storing the prepared sheep fibers and cotton fibers in a humidification room of 90 ~ 96% relative humidity for 12 to 36 hours,

A carding process for supplying a blend wrap generated by the blending surface process to a carding machine to create a blended slicker,

A softening process for stretching the blended slicer,

After the softening process, supplying to the spinning machine, the spinning process to make the spinning yarn while twisting while drafting,

Provided is a spinning method of spinning yarns and cotton fibers, characterized in that the spinning yarn is supplied to the ring spinning machine while adjusting the relative spinning to 60-65% relative to the draft spinning yarn to make the yarn twisted.

Hereinafter, the present invention will be described in more detail.

The spun yarn of cotton / cotton fibers of the present invention uses the spinning machine used in the general method of manufacturing cotton spun yarn, but finely adjusts the conditions in each process to suit the characteristics of the yarn fibers. In general, in the case of the surface spinning process, go through the blending surface, carding, softening, spinning, spinning process, but in the case of the present invention goes through the same process sequence.

First of all, after refining and drying the yam stems, the shells are split into long fibers, and then the filament fiber preparation process is cut so that the fiber length is 45-50 mm, and the cotton fiber preparation is prepared by destructing the cotton fibers to make the fiber length 28-30 mm. The process is performed.

Since the prepared hemp fibers and cotton fibers are stored in a humidification chamber of relative humidity 90-96% for 12 to 36 hours and then perform a blending process to form a blend wrap using each wrap. Since the fiber is thick and inferior in flexibility and composition, it is difficult to form a lap when mixed in normal cotton spinning conditions.

After the wrap is made, the blend wrap is supplied to a carding machine, and a carding process is performed to make a blended slicer. Due to the physical properties of the raw material of the horse's wool, the fibers fall, woo, and scatter, and most of the fibers fall into the drop in the carding process. The problem of extremely low yield occurs. Therefore, it is important to reduce air fall by controlling the airflow during carding.

In the case of a carding process, a process of combing the raw fibers (tuft) supplied from the horn surface process in the longitudinal direction and removing the miscellaneous material through the fibers between the upper and lower metal needles to parallelize the raw material fibers to remove the miscellaneous matter. The sliver made by the carding process is preferably thicker than the general cotton sliver, which is to increase the thickness of the sliver in order to increase the strength of the sliver version because the binding strength between the fibers of the yarn is weak. In the case of general cotton fibers, about 0.12Ne (male) is preferable, but in the case of the hemp / cotton blended sliver of the present invention, the fineness of 0.05 to 0.08Ne (male) is good.

The softening process is the same as the softening process in general area spinning, while reducing the thickness of the sliver and improving the uniformity. In the present invention, the softening process in the case of 100% of hemp fiber causes the blockage of the trumpet in the softening process, so that the release is not good and the cutting of the sliver occurs, so the trumpet diameter used in the softening process is 6-9 mm. In addition, the roller spacing of the soft roller may be 80 to 90% of the filament fiber length to prevent sliver cutting and improve the operating condition.

After the softening step, the spinning process is performed in the same manner as the cotton fiber. The D / R ratio is good at 7.0 ~ 8.5 degrees and the twist number is 1.6 ~ 1.8 T / M, which is good for prevention of trimming. In the case of cotton fibers, about 1.1 T / M is preferred. However, in the case of hemp / cotton blends, it is better to give a higher T / M because the bonding strength of the fibers is low.

In the apron roller of the spinning process, the distance between the back roller and the mid roller is 40 to 50 mm and the distance between the mid roller and the front roller is 30 to 40 mm, which is helpful for the release and yarn quality of the spinning yarn. In other words, since the part of the yam fiber is cut by a mixed surface, a carding process, and a softening process, and short fibers are formed, the roller spacing is preferably narrow as described above to control the short fibers.

After the spinning process, a spinning process is performed. The spinning yarn is fed to a ring spinning machine to give a twist while drafting to form a mixed spinning yarn. Humidity in the spinning process in the present invention is controlled to 60 ~ 65% relative humidity higher than the surface spinning to prevent the occurrence of static electricity. In the apron roller of the square process, the gap between the back roller and the mid roller is 55 to 60 mm and the distance between the mid roller and the front roller is 50 to 55 mm to prevent the occurrence of neps due to the short fiber length of the kapok. Is preferred.

By the spinning method, a single yarn strength of 200-400 cN, a tensile yarn elongation of 6.0 ~ 11.0% of the mixed yarn / cotton yarn is prepared.

Therefore, according to the present invention, web formation in the carding process, which is a problem of the short fiber spinning method due to the problem of the basic properties of the filament fiber, the sliver cutting in the softening process, the roving cutting in the spinning process and the trimming in the square process In order to solve the problem of generation, the tensile strength is very high, delicate, very light and soft yarn / cotton blended spun yarn can be manufactured with excellent yield.

In the following examples, non-limiting examples of the mixed spinning method of the sheep / cotton fibers of the present invention are given.

[Examples 1 and 2]

1. Honta cotton process

After refining and drying the yam stems, the shell is split into long fibers and then the filament fiber preparation process is cut to have a fiber length of 45-50 mm, and the cotton fiber preparation process is prepared by separately selecting cotton fibers to make the fiber length 28-30 mm. After the preparation, the prepared wool fibers and cotton fibers are stored in a humidification chamber with a relative humidity of 90% for 24 hours to form a wrap to prevent damage of the sheep fibers to reduce the loss of Nep or fall in the subsequent process. The hemp fibers and cotton fibers are mixed together at a ratio of 50/50 (Example 1) and 70/30 (Example 2), respectively.

2. carding process

The blending wrap is supplied to a carding machine to perform a carding process of making a blended slicing machine. The sliver was manufactured while reducing the carding action to prevent damage to the fiber.

3. Softening, Roving, Spinning Process

Softening, spinning, and spinning processes are shown in Table 1 below. The square used a ring spinning machine.

Process Name Soft Preservation Square
Equipment condition
R / O Gauge: 40 × 40 × 45
D / R Ratio 7.5
Trumpet diameter 6-9 mm R / O Gauge: 34 × 48 × 48
TM: 1.8
D / R ratio 9 R / O Gauge: 53 × 66
TM: 3.5
D / R Ratio 25

The basic properties of the spun yarn / cotton mixed spun yarn spun under the above conditions were tested to obtain the results as shown in Table 2 below.

Item Example 1 Example 2 Mixed use rate (sheep: cotton) 50: 50 70: 30 count 20 number 20 number Single yarn strength (cN) 351 344 Monotheism 10.9 6.8 Defects per km 15 13

Claims (5)

After refining and drying the yam stems, the shell is split into long fibers, and then the yam fibers are prepared to be cut to 45-50 mm,
Cotton fiber preparation process to separate the cotton fibers to prepare a fiber length of 28 ~ 30㎜,
Honta cotton process of forming a blend wrap using each wrap after storing the prepared sheep fibers and cotton fibers in a humidification room of 90 ~ 96% relative humidity for 12 to 36 hours,
A carding process for supplying a blend wrap generated by the blending surface process to a carding machine to create a blended slicker,
A softening process for stretching the blended slicer,
After the softening process, supplying to the spinning machine, the spinning process to make the spinning yarn while twisting while drafting,
Mixing spinning method of hemp / cotton fibers, characterized in that the spinning yarn is supplied to a ring spinning machine while adjusting the relative humidity to 60-65%, and a spinning process is made by giving twist while spinning.
The method of claim 1, wherein the roller spacing of the softening roller of the softening process is 80 to 90% of the filament length of the filament. The method of claim 1, wherein the apron roller of the spinning process has a spacing between the back roller and the mid roller of 40 to 50 mm and a spacing between the mid roller and the front roller of 30 to 40 mm. .
The method of claim 1, wherein the apron roller of the spinning step is 55-60 mm between the back roller and the mid roller and 50-55 mm between the mid roller and the front roller. .
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