JP3304934B2 - Hemp yarn processing method and hemp knitted fabric using the processed hemp yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

SUMMARY OF THE INVENTION The present invention relates to the improvement of properties of hemp yarns, particularly ramie (linen) and linen (flax), which are the most common in the category. Since the elongation is considerably poor, the hemp yarn, which has rarely been used as a raw yarn for pattern knitting, can be sufficiently used as a raw yarn for pattern knitting even with 100% hemp yarn. It is an object of the present invention to provide a novel hemp yarn processing method and a new hemp knitted fabric using the processed hemp yarn.

[0002]

[Prior Art] Patterned knitted goods made by knitting patterns
It is difficult to commercialize only so-called conventional yarns for knitting, such as cotton yarns, wool yarns, and silk yarns. In the knitting industry,
Due to the properties of these usable knitting yarns, autumn and winter products must be the center, and during the summer production period,
The order volume fell into a quiet period when it declined at a considerable rate, and it was extremely difficult to secure an average order volume throughout the year. In the knitting industry, which has been struggling for a while, various effective measures for stabilizing the management even a little have been sought.

[0003] The knitting industry in the prefecture, which suffers from such a harsh environment, as well as the knitting industry in Japan as a whole, has accumulated over the years as its mission as a public research institution that has provided guidance and supervision on textile technology in general. The department in charge of the Yamagata Prefecture Industrial Technology Center, which possesses advanced technology, pays attention to the original fiber that is comfortable and has high moisture absorption, and the possibility of using hemp as a knit yarn for summer About its development and research.

[0004] Hemp has been used as a high-grade summer fiber in textiles for business suits and kimonos for many years, because of its advantageous characteristics such as texture and moisture absorption due to its fibrous properties. It is one of traditional and common natural fibers. However, unlike the natural fibers such as cotton, wool, and silk, the hemp fibers themselves include the unique properties that the fibers are hard and have no elasticity. Although it is possible to do it, it seems that it was only a general recognition judgment that it is extremely difficult to knit it into a three-dimensional patterned knit product, and there is a track record of researching the possibility as a knit raw yarn Not to mention, there is no experimental report or related literature on it, and there is no pattern knitted product made of 100% hemp in practical use.

[0005] In order to use this hemp as a raw knit yarn for a pattern, it is necessary to satisfy a minimum condition that at least elasticity as a raw yarn must be secured so as to be hung on a knitting machine. As one of the effective means, use of a mercerizing treatment method that has been adopted as a treatment method for other purposes such as hemp, cellulose, rayon, and other cellulosic fibers is expected.

[0006] The mercerizing treatment method is already known from various reports and literatures. For example, "Polymer Handbook, Revised Edition", p. 349, 1. Stretching cotton cloth by tensionless mercerization Processing, 1.1. Tensile mercerization, line 5 and below, "When cotton fiber is treated with caustic soda, it swells and shrinks, resulting in an increase in cutting elongation.
Goldthwait reports that much research has been done since ancient times, but the increase in elongation with fiber treatment is much smaller than with fabric. This difference is also due to factors such as the thickness, number of twists, and fabric structure of the yarns constituting the woven fabric, suggesting that the stretchability is not caused only by the contraction of the fiber length and direction. , ……
...... "

[0007] The expansion and shrinkage of cotton fibers with caustic soda are maximum at a concentration of about 15%, and decrease more when the concentration is further reduced. However, when the fabric is mercerized, it is affected by the cross-sectional expansion of the fibers. Since this cross-sectional expansion is larger at higher concentrations, the cross-sectional expansion is 2% as in the case of ordinary tension mercerization.
A concentration of 2% or more is used. In a WA Reeves report, four fabrics were tested, with nearly the highest shrinkage at 23% caustic soda. …
As an example, the use of this mercerizing treatment method is introduced and known as a technique relating to a woven fabric, which is almost always a cotton woven fabric.

Also, "Textile Handbook" published by Maruzen Shoten (Processing Edition)
Also in the description of the section on 4.4.7 mercerization on pages 922 to 923, "Process for imparting silky luster by treating cotton yarn or cotton cloth under tension using concentrated sodium hydroxide solution. In 1844, John Mercer of the United Kingdom discovered the phenomenon of strong expansion and contraction of cotton fabric due to concentrated sodium hydroxide, and in 1889 Lowe found that under tension it increased gloss. , 1895 Thomas Pr
evost industrialized this. It was called mercerization after the first discoverer. "
With

[0009] Subsequently, the "mercerizing process of cotton cloth is usually performed using a 20% to 25% aqueous sodium hydroxide solution under tension, washing with tension while washing with water, washing with hot water, neutralizing,
This is performed in the washing process. The temperature is usually room temperature of 25 ° C. or less, and particularly when the temperature is 5 ° C. or less, it is called cold mercerization. The phenomenon of mercerization is that the crystal structure of natural cellulose (cellulose) is changed by the addition reaction of sodium cellulose into the crystal (Na
-), which is based on the process of changing the crystal structure (cellulose) of hydrated cellulose after washing with water. …… ” As can be seen from the facts that have been elucidated, it is clear from these various documents and reports that with regard to cotton yarn or cotton cloth, the mercerizing treatment method as a means for modifying cotton yarn or cotton cloth, especially as a means for imparting gloss, has already been established as a public technology. And is well known.

On the other hand, as a technique to which these known techniques are applied, for example, Japanese Patent Application Laid-Open No. 61-47871 discloses a method for simulating cellulose fiber such as cotton, rayon, etc. In order to perform hemp processing (processing that emphasizes the feeling of shari), a method of “impregnating a cellulosic fiber with an alkali solution, then performing a drying treatment, and then merging the fiber at a low temperature” has been proposed. Japanese Patent Application Laid-Open No. Sho 59-163468 discloses a "method for modifying natural cellulosic fibers" which includes cotton, hemp, jute,
To ensure the dimensional stability of natural cellulosic fibers such as flax to water, `` When treating natural cellulosic fibers with a mercerizing agent, before impregnating the natural cellulosic fibers with the mercerizing agent, In addition, a method of preliminarily containing 3% by weight or more of water with respect to the absolute dry weight of the fiber "is sometimes found.

[0011] Among these known documents, although it can be found that there is certainly a fact that one of the natural cellulosic fibers is a mercerizing treatment for hemp, any of them is found to be a natural cellulosic fiber. The purpose of the present invention is to use a hemp yarn, which has rarely been used as a raw yarn for pattern knitting or the like until now.
Regarding a method of processing hemp yarn that can be sufficiently used as a raw yarn for pattern knitting even with 0% hemp yarn, and a hemp knitted fabric using the processed hemp yarn, mercerizing treatment is performed under specific conditions. There was nothing to disclose not only the technology, but even the technology that would suggest reaching it.

The present invention has been made in view of the above situation,
In particular, as one of the important local industries, as a member of the local residents who are deeply involved with the public and private sectors in the development of the knitting industry in the prefecture, which is facing difficulties from various factors, due to various factors, As a measure to secure an average order volume through
The traditional knitted yarn for pattern knitting relies solely on cotton, wool, synthetic and silk yarns. Focusing on the original fibrous nature of being heavily rich, he began expeditiously developing and researching the possibility of using hemp as a patterned knit yarn for summer, and continued various explorations over the years, As a result of repeating the trial production experiment, we finally succeeded in completing a new hemp yarn processing method almost as expected and a new hemp knitted fabric using the processed hemp yarn, The configuration will be sequentially described in detail together with typical embodiments.

[0013]

The gist of the method for processing hemp yarn according to the present invention basically includes the following steps.
That is, a step of making a skein by a hemp yarn of a predetermined length of ramie, linen, etc.
6-1: In a NaOH or KOH solution maintained at a concentration of about 13 to 30% and a temperature of about 20 to 40 ° C. for about 30 to 60 minutes, in a skein state without tension, in an amount to give a ratio of 40. Dip and shrink in the state, 70 ~ 4 against the original skein
A step of shrinking until the skein length becomes about 0%,
After thoroughly draining and washing, neutralize the alkali components in the hemp yarn with an acid such as acetic acid, and then perform a water-washing process again to fix the shrinkage property of the hemp thread. A method of processing a hemp yarn by a step of dewatering sufficiently by a non-stripping means, detangling the hemp yarn for each skein, and drying the same in a manner that does not interfere with the properties of the shrunk hemp yarn, and a subsequent step It is.

More specifically, a step of making a skein by a hemp yarn of a predetermined length such as ramie or linen, a step of setting a skein of a predetermined weight in the shrinkage adjusting frame, Weight skein is 1: 6 in bath ratio
~ 1: An amount that gives a ratio of 40, a concentration of about 13 to 30%,
NaOH or K maintained at a temperature of about 20 to 40 ° C.
When immersed in an OH solution for about 30 to 60 minutes in the skein state set in the shrinkage adjustment frame, shrunk without tension until regulated by the shrinkage adjustment frame, and shrunk without tension until the end Slightly less than the shrinkage rate of the step, the entire shrinkage rate is stopped at a shrinkage rate of substantially constant length, the entire hemp yarn is subjected to a shrinkage treatment so as to be in a uniform or substantially uniform shrinkage state, and then sufficiently drained and washed with water. Above, a step of neutralizing the alkali component in the hemp yarn with an acid such as acetic acid, and then performing a water washing treatment again to fix the shrinkage property of the hemp thread, and sufficiently dewatering by means that does not interfere with the properties of the shrinked hemp thread. A method of processing a hemp yarn, comprising the steps of: detangling the hemp yarn for each skein and then drying the same by means that does not interfere with the properties of the shrunk yarn. It can be said.

As the hemp yarn, there is no particular problem with so-called general hemp including cannabis, sisal hemp, manila hemp, kenaf hemp, etc. However, the most common and easily available ramie (ramie) and flax (linen) are available. The present invention can be applied to any form of a single yarn to a twin yarn, or three or more twisted yarns, or any other twisted hemp fibers. Before being immersed in the skein, a skein of a predetermined weight for each predetermined length, for example, 1-2
In consideration of shrinkage after processing, which is about 100 to 200 g in m, it must be made into a skein 1.5 to 2.0 larger than a normal skein length.

[0016] The treatment solution is an alkaline solution containing lithium hydroxide, cesium hydroxide, liquid ammonia or the like, which is known as a mercerize treatment solution. (NaO
H) solution or potassium hydroxide (KOH) solution is optimal, and its concentration is 13% or more, which is different from 22% or more reported for cotton yarn or cotton cloth and 23% as the optimal value.
In the case of a NaOH solution, the optimum value is 20% in the range of about 13 to 30%, and the KOH solution is higher than the NaOH solution by 2%.
The optimum value is about 30% within a range of about 0 to 30%.

The temperature of the treatment liquid is in the range of room temperature of 25 ° C. or less reported for cotton yarn or cotton cloth, or in the range of -5 ° C. to -10 ° C. applied to the described invention and the like. Processing and -10 ° C to 100 ° C
Etc. and should not be as wide as
℃, NaOH solution, KOH solution, optimally 30
C. to 40.degree. C. should be maintained.

The ratio of the skein of hemp yarn and the treatment liquid prepared under the above conditions is 1: 6 to 1:40, preferably 1:20 for both NaOH solution and KOH solution. Thus, a processing solution for a predetermined amount of skein is prepared, and the skein of the predetermined amount is stiffened in the NaOH or KOH solution for 30 to 60 minutes, preferably 30 to 40 minutes. The skein is immersed in such a state that the skein is reduced to about 70 to 40% of the original skein length.

It should be noted that if the fibers are left in a completely tensionless state until the final stage of achieving the shrinkage ratio, the fibrous material of the hemp yarn constituting the skein is not always homogeneous, and the skein becomes partially shrunk. Because of the possibility of skein, the entire skein is not shrunk freely to the end, and the skein length of the part that shrinks the least when shrunk freely is assumed in advance (size of skein, processing solution conditions, etc.) It should be assumed after confirming the variation in contraction in a completely tension-free state in advance.) Other parts are also held down to the degree of contraction, and uniform contraction as a whole is realized. Before immersion, all the skeins are set in advance in the shrinkage adjusting frame, and the skeins are immersed in the processing solution together with the shrinkage adjusting frame, or the skein is regulated under a predetermined condition. Projected in a standing shape inside Fit the hank from the upper end of the contraction adjustment frame which is to spread the ring Te is induced on the outer circumferential surface of the contraction adjustment frame descends, so as gradually immersed in naturally treating solution.

As described above, the shrinkage adjusting frame required for this step is provided with the shrinkage of the hemp yarn having a good shrinkage to the hemp yarn having a poor shrinkage caused by the variation of the fiber quality among the hemp yarns constituting the skein. Since it fulfills the function of regulating the alignment, the shrinkage of more than a predetermined amount can be suppressed, and the skein can be exteriorized, and after the shrinkage treatment step, the shrunk hemp fiber is removed without being caught The structure is not particularly limited as long as it is made of a metal, such as wood or stainless steel, or an alkali-resistant synthetic resin. It can be used in any shape, thick plate, etc., as long as they do not interfere with the processing liquid reaching the skein and immersion. What is going to be Needless to, if necessary, such as known proper size adjustment mechanism may correspond to the size of the skein, it is of course possible built employing contraction adjustment frame comprising a structure advantageous in practical use.

After the treatment liquid immersion step under the predetermined conditions as described above is completed, a water washing step, and then a neutralization and a subsequent water washing step are carried out by checking the shrinkage property of the hemp yarn after the previous treatment liquid immersion step. In order to maintain and fix it, steps by known means generally employed in the conventional mercerization process will be performed, but when performing these steps, the properties of the contracted hemp yarns are not affected. In order to prevent the centrifugal force from acting in the direction of the fiber as much as possible if the skein is loaded into a dehydrator, the entire skein is rounded in a dango-shape. It must be sufficiently dehydrated by handling it in a packed state, etc.Also, in order not to interfere with the properties of the shrunk hemp yarn, for example, skein on a net stretched almost horizontally To It is necessary to dry it by a method that takes care to make it hanged and never hang it.Before starting this drying process, fully entangle the hemp yarn for each skein, dry it and leave it as it is. It is necessary to be able to orderly perform the operation of winding or cone-up the hemp yarn which has been uniformly shrunk in order to be put on a knitting machine.

[0022]

[Related invention] In relation to the hemp yarn processing method of the present invention having the gist as described in detail above, the present invention includes a hemp knitted fabric using the processed hemp yarn having the following structure. Have been. That is, the processed hemp yarn obtained by shrinking the skein of the untreated hemp yarn to the skein to about 70 to 40% is converted into 100% or an appropriate ratio of cotton yarn, silk yarn,
A hemp comprising a processed hemp yarn obtained by the novel hemp yarn processing method of the present invention, wherein the hemp yarn is formed by knitting a pattern by knitting or knitting as a twisted yarn obtained by combining a synthetic fiber or the like. It is a knitted fabric.

The processed hemp yarn formed by the novel hemp yarn processing method which forms the basis of the present invention and contracted to a shrinkage ratio of about 70 to 40% is obtained when the entanglement is previously released in a skein state. In the case of skeins that have not been sufficiently unwound, carefully disentangle them, and then process the knitted knitted yarn into a well-known knitting machine, especially a computer weft knitting machine. Means, such as winding or corn-up, and wound into a predetermined cylinder, with 100% hemp as processed yarn, without any distinction from the case of cotton yarn or wool, which is a conventional yarn for knitting,
It is possible to obtain a hemp-knitted fabric by a stitch knitting, a forming knitting or the like, which has been made impossible by a machine knitting such as a stitch knitting or a forming knitting. In the following, some specific examples of the method for processing hemp yarn of the present invention will be described.

[0024]

Example 1 A 60/2 ramie was rolled 200 times by a rewinding machine to produce a skein having a length of 126.0 cm, and the skein was kept in a NaOH solution having a temperature of 25 ° C. and a concentration of 20% without tension. After immersion in water for 60 minutes, the mixture was subjected to liquid removal and water washing, neutralized with acetic acid, washed again with water, dehydrated and dried, and the length of the obtained skein was 71.6.
cm, the shrinkage of which was about 43.2%, and the processed hemp yarn of the present invention, which was bulky and highly elastic, was obtained.

[0025]

Example 2 A 60/2 ramie was rolled 200 times by a rewinding machine to make a skein of 126.0 cm in length, and the skein was kept in a KOH solution at a temperature of 25 ° C. and a concentration of 30% without tension. After immersion in for 60 minutes, the mixture was drained, washed with water, neutralized with acetic acid, washed again with water, dehydrated and dried, and the length of the obtained skein was reduced to 82.6 cm. It shrank to about 65.6% of the original skein length, and a processed hemp yarn having a bulky and elasticity and a soft texture was obtained.

[0026]

Example 3 A 60/2 ramie was rolled 200 times by a rewinding machine to make a skein having a length of 126.0 cm, and the diameter of the tube portion was approximately 23 cm (perimeter: approximately 73 cm). A mounting disk with a length of about 60 cm and a lower end with a diameter of about 50 cm (a disk with an outer circumference larger than the skein length) is integrated so that its center matches the cylinder axis. After the outer shape of the shrinkage adjustment frame made of metal, the skein was heated at 25 ° C. with the shrinkage adjustment frame.
6% in a 20% NaOH solution without tension
After immersion for 0 minutes, a dewatering and water washing treatment was performed, and then a neutralization treatment with acetic acid was completed, followed by water washing, dehydration and drying treatment again. The last step is regulated, and what is supposed to shrink to about 71.6 cm (about 43.2%) in the skein length as in Example 1 above is originally reduced to 73.8 cm (about 43.2%) in the skein length. 41.
4%), there was almost no apparent change in the bulkiness, but the shrinkage state of the entire hemp yarn constituting the skein appeared uniform in appearance, and the shrinkage was homogenized. The processed hemp yarn of the present invention, which is rich in elasticity, was obtained.

[0027]

Example 4 A skein of 60/2 ramie was prepared and the skein was heated at a temperature of 2
After being immersed in a NaOH solution having a concentration of 5% and a concentration of 20% for 60 minutes in a tension-free state, the solution was subjected to deliquoring and water-washing treatments.
After the neutralization treatment with acetic acid, washing with water and dehydration treatment again, carefully entangle the hemp yarns that have shrunk beforehand, and apply a drying treatment to obtain a processed hemp yarn with a shrinkage of about 57%. After staining with reactive dyes (Sumifix Brill. Red Bsp and Sumifix Brill. Violet Bsp),
After rewinding and performing openwork knitting with a computer knitting machine, the knitted fabric of the present invention was produced without any thread breaks and was extremely smoothly knitted. A 100% openwork summer knit sweater was obtained.

[0028]

In the case of the hemp yarn processing method of the present invention, which is realized under the above-described steps, a comparison can be made with the results of mercerizing processing of cotton yarn or cotton cloth which has been conventionally known. 1 As shown in the comparative data in "Shrinkage ratio between cotton and hemp", the processed hemp yarn according to the present invention has a shrinkage result of about 2-2.5 times that of cotton yarn, An extremely peculiar shrinking action that cannot be predicted from the mercerize processing data of the cotton cloth is exhibited.

[0029]

[Table 1]

Table 2 below, "Effect of alkali concentration"
As shown in the data of the results of experiments, the processing method of hemp yarn according to the present invention also has a concentration of about 13 to 30%, which is different from 22% or more reported for cotton yarn or cotton cloth and 23% as an optimum value. , In particular,
In the case of a NaOH solution, the optimum value is 20% in the range of about 13 to 30%, and in the case of the KOH solution, the optimum value is 30 in the range of about 20 to 30%, which is higher than that of the NaOH solution. %.

[0031]

[Table 2]

Further, as shown in the data of the experimental results in Table 3 "Effect of temperature", the temperature of the treatment liquid in the method for processing hemp yarn of the present invention is clarified by various documents reported on cotton yarn and cotton cloth. The range of room temperature of 25 ° C. or lower, or the method of Japanese Patent Application Laid-Open No. 61-47871, “Method for processing pseudo-hemp of cellulosic fiber”, and Japanese Patent Application Laid-Open No.
The low-temperature mercerizing treatment in the range of −5 ° C. to −10 ° C. applied to 3468 invention “Method for modifying natural cellulosic fiber” and the like, and a wide range of things such as −10 ° C. to 100 ° C. About 20 ° C to 40 ° C, NaO
Both the H solution and the KOH solution should be optimally maintained at 30 ° C to 40 ° C.

[0033]

[Table 3]

The reason that such a method of processing hemp yarn has not been particularly studied so far and has not been utilized in practical use is that hemp yarn is a relatively rare and expensive fiber, and The range of use was fixed, and because of the fibrous characteristics inherent to hemp yarn, it was limited to use as a woven fabric, and had been given up as a knitted fabric. The principle of processing is also directed exclusively to cotton yarns or cotton fabrics, and in the case of the cotton yarns or cotton fabrics, as seen from the above comparative data, the comparatively low elasticity ratio, for the cotton yarns which are originally shrinkable fibrous materials, The necessity of application to the side of improving the contractility is scarce, and the application as a tension contraction technique has been advanced, and in the application to hemp, has hemp yarn been used exclusively as a fabric? And therefore, so that it was not only made application to hemp fabric, essentially that lacked the necessity of applying the hemp to knit YoHara thread is expected and why.

In the method for processing a hemp yarn according to the present invention having the basic configuration, the shrinkage adjusting frame is immersed in the processing solution, so that the shrinkage adjusting frame is regulated by the shrinkage adjusting frame. Within the range, the skein is shrunk without tension, and among the hemp yarns that make up the skein, the hemp yarn that tends to shrink extremely due to the difference in the fiber quality,
In the shrinking process, the shrinkage is regulated by the shrinkage within the range determined by the size of the shrinkage adjustment frame, and further shrinkage is suppressed. Although it is slightly less than that, it is possible to make the same shrinkage rate as that of the hemp yarn having the worst shrinkage rate assumed in advance, and the shrinkage rate becomes substantially constant for the entire skein.

Moreover, it is prevented that the hemp yarn located on the outside of the skein overlaps with the hemp yarn located on the inside of the skein and remarkably swells to form an irregular fiber cross section.
In the same way as the phenomenon of shrinking while swelling into a relatively clean circular or elliptical cross-section, the inner part of the hemp yarn desired at the innermost side of the skein adjusts the shrinkage during the swelling and shrinking process. Since it comes into contact with the frame (a condition close to the state of overlapping), it shrinks while swelling to a relatively clean circular or elliptical cross section. Therefore, it is possible to perform a shrinking treatment in which the entire hemp yarn constituting the skein is in a uniform or substantially homogeneous shrink state, and the bulkiness of the entire hemp yarn constituting the skein is also homogenized.

As a result, the processed hemp yarn of the present invention can be directly unwound when entangled in a skein state or untwisted carefully when the skein is not sufficiently unwound. After that, the processed hemp yarn in the skein state, so that it can be put on a flat knitting machine, especially a computer flat knitting machine,
A known winding means, such as winding or cone-up, is wound into a predetermined cylinder, and a 100% hemp yarn is used as it is for the knitting original yarn, and a conventional cotton yarn or wool yarn is used. Without any distinction, machine knitting such as pattern knitting and molding knitting, as a hemp knitted fabric by pattern knitting and molding knitting that has been considered impossible at all, it has a refreshing feel and is suitable for summer clothes 100% hemp knit products can be obtained.

[0038]

According to the method for processing hemp yarn of the present invention and the hemp knitted fabric thereby, the hemp fiber itself is harder than natural fibers such as cotton, wool, and silk. Since it has the unique property of not having elasticity, it can be made into a woven fabric, but it has been difficult to knit it into a three-dimensional patterned knit product. % Of patterned knitwear has become practically and fully feasible, making it possible to provide summer knitted patterned knitted goods in the knitting industry, where autumn and winter items have had to be the center until now. Will be able to secure a stable management base, and to revitalize the industry, which has been suffering from recession and has been competing with foreign products. Cormorant is intended to demonstrate the extremely Xiu features.

In particular, with the specific structure described in the embodiment, an extremely stable effect in characteristics such as shrinkage and bulkiness can be obtained, and furthermore, a processing method by a shrinkage processing step incorporating a shrinkage adjusting frame. According to the above, the above-mentioned properties of the manufactured hemp yarn are further stabilized, and it is possible to realize an extremely high quality hemp yarn, and the processed hemp yarn and the hemp knitted fabric are dyed with a direct dye or a reactive dye. Not only will it be possible, but its dyeing properties will be much better than untreated hemp, and it will have the advantage of enabling deep color dyeing, which has been considered difficult as it is. It will be.

As described above, the method for processing hemp yarn of the present invention,
And the hemp knitted fabric of the processed hemp yarn is made to achieve the intended purpose by its novel construction, and the excellent characteristics brought by the hemp knitted fabric is 100% optimal for summer knitted products. Since the production of patterned knitted goods becomes possible, stable production is possible throughout the year, bringing great benefits to the knitting industry, stabilizing the business, and revitalizing the location where it is located. It can have a positive effect on the local economy as well, and is expected to be widely spread and developed with high praise from various fields.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-207636 (JP, A) JP-A-63-203867 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06M 11/00-11/84

Claims (5)

(57) [Claims] 1. A step of making a skein with a predetermined length of hemp yarn such as ramie, linen, etc., and skeins of a predetermined weight are mixed in a bath ratio of 1: 6 to 1:40 in a concentration of 13 to 30. %, Temperature 2
It is immersed and shrunk in a NaOH or KOH solution maintained at about 0 to 40 ° C. for about 30 to 60 minutes in a skein state without tension, and skein of about 70 to 40% with respect to the original skein. Step of shrinking until the length becomes longer, then sufficiently draining and washing, neutralize the alkaline components in the hemp yarn with an acid such as acetic acid, and then perform water washing again to fix the shrinkage properties of the hemp yarn Process, sufficiently dehydrate with a means that does not interfere with the properties of the shrunk hemp, then untangle the hemp with each skein, and dry it with a means that does not interfere with the properties of the shrimp hemp similarly A method for processing hemp yarn, comprising a step of treating and the above steps. 2. A step of making a skein by hemp yarn of a predetermined length of ramie, linen, etc., a step of setting a skein of a predetermined weight in a shrinkage adjustment frame, and a step of setting a skein of a predetermined weight in the shrinkage adjustment frame. A ratio of 1: 6 to 1:40 in the bath ratio, a concentration of about 13 to 30%, and a temperature of 2
Immerse in a NaOH or KOH solution maintained at about 0 to 40 ° C. for about 30 to 60 minutes with the skein set in the shrinkage adjustment frame, and shrink without tension until regulated by the shrinkage adjustment frame The shrinkage rate is slightly lower than the shrinkage rate when shrinking without tension until the end, and the entire shrinkage rate is kept at a substantially constant length, and the entire hemp yarn is shrunk so as to be in a uniform or substantially uniform shrinkage state. Process, after that, after sufficiently draining and washing, neutralizing the alkali component in the hemp yarn with an acid such as acetic acid, and then performing a water washing process again to fix the shrinkage property of the hemp yarn, After sufficiently dewatering with a means that does not hinder the process, the entanglement of the hemp yarn for each skein, and then a drying treatment with a means that does not hinder the properties of the shrunk hemp yarn, Processing of hemp yarn characterized by comprising a process Law. 3. In the shrinking step, when the treatment liquid for immersing the skein is a NaOH solution, a predetermined weight of the skein is applied in a concentration of 13 to 30% in a bath ratio of about 1:20. The method for processing hemp yarn according to any one of claims 1 and 2, wherein the yarn is shrunk by immersion in a treatment liquid maintained at a temperature of about 30 to 40 ° C for at least 30 minutes. 4. When the shrinking treatment is performed by using a KOH solution as a treatment liquid for immersing the skein, a predetermined weight of the skein is used in a bath ratio of about 20 in a concentration of 20 to 30%. The method for processing hemp yarn according to any one of claims 1 and 2, wherein the yarn is shrunk by immersion in a treatment liquid maintained at a temperature of about 30 to 40 ° C for at least 30 minutes. 5. A twisted yarn obtained by combining 100% or an appropriate ratio of cotton yarn, silk yarn, synthetic fiber yarn, etc. with a processed hemp yarn obtained by shrinking the untreated hemp yarn to a skein of 70 to 40%. A hemp knitted fabric made of processed hemp yarn obtained by the method of processing hemp yarn according to any one of claims 1 to 4, wherein the hemp knitted fabric is formed as a knitted fabric obtained by shaking or shaping.