TW201610259A - Method of producing hemp for spinning and hemp for spinning - Google Patents

Abstract

A method of producing hemp for spinning, the method including: dipping hemp as a raw material in a treatment liquid containing water and at least one enzyme selected from the group consisting of a proteolytic enzyme and an amylolytic enzyme, at from 60 DEG C to 100 DEG C, for from 30 minutes to 60 minutes; rinsing the dipped hemp with water; and drying the rinsed hemp.

Description

Method for producing hemp fiber for spinning and hemp fiber for spinning

The present invention relates to a method for producing hemp fibers for spinning and hemp fibers for spinning.

In recent years, the greenhouse effect on the global environment has become a problem. Human beings are also required to have a cool feeling in wearing clothes. In the fiber market, hemp materials with a refreshing touch of natural materials are becoming more and more popular. Hemp fibers are used as fabrics. Demand is expanding. The cotton fiber which is a natural cellulose fiber like hemp is derived from a plant called "cotton", and the fiber itself is soft, and the spinning property and the workability are excellent. On the other hand, the raw material used in the production of cloth is the leaves and stems of plants. The leaves and stems are formed of cellulose, and the components such as lignin are present between the fibers. Therefore, the strength of the fiber material is high, but the surface of the fiber is hard and the surface of the fiber is smooth, and the processing is difficult, or the processed cloth has a rough touch. The feeling of tactile deterioration. For example, a method in which a surface of a cellulose-based fiber fabric is treated with a cellulolytic enzyme and then treated with a strong aqueous alkali solution is used as a technique for improving the tactile sensation of cellulose fibers such as hemp fibers (for example, refer to Japanese Patent Laid-Open) Bulletin 5-247852). This method is a technique for improving the touch of the surface of a fabric composed of cellulose fibers such as hemp, and does not consider the processing use of a fiber raw material such as a yarn for spinning.

Hemp fiber is high strength but straight. Therefore, when the hemp fiber is spun and is to be woven or knitted into a woven fabric or a knitted fabric, the surface of the hemp fiber is smooth, so that it is difficult to hang on the spinning device for the production of the crepe which is generally used. In the case of spinning, the fiber yield is low, and it is easy to cause the fibers to fall off, the yarn breakage, and the productivity to be low. In addition, since the hemp fiber is straight, it is difficult to obtain a crepe yarn having a fine fiber diameter and a crepe yarn having a fixed thickness of the yarn, and the production of the woven fabric or the knitted fabric using the hemp yarn is also a factor of deterioration in productivity.

The method of cutting the leaves and stems of plants such as hemp as a fiber raw material has been implemented since ancient times. As a method, in order to finely cut the hemp fiber and to remove the substance such as lignin between the cellulose fibers, it is a method of using a physical means of hitting the fiber with an anvil or making a fiber. Even in recent years, the method of compressing hemp fibers between rolls before hemp spinning is adopted, but the current situation is that sufficient spinning yield cannot be achieved. Further, it is known that when a cellulose fiber is treated with a strong alkali or a strong acid, flexibility can be imparted, but the strength of the fiber is remarkably lowered, which is not practical. Therefore, the hemp fiber product which is currently in circulation is often characterized by a unique touch which is caused by the unevenness of the yarn composed of hemp fiber, and it is desired to provide the crepe and linen of cotton which is soft and versatile.

It has been proposed that a method in which hemp fibers are treated with a treatment liquid containing cellulolytic enzymes to remove pectin and lignin present between cellulose of hemp fibers as a method for modifying hemp fibers is disclosed. According to this treatment, hemp fibers having less skin irritation and excellent spinning properties can be obtained (for example, see JP-A-1-139874).

[Problems to be solved by the invention]

However, the processing technique described in Japanese Laid-Open Patent Publication No. Hei 5-247852 relates to a technique for processing the surface of a fabric obtained by weaving or knitting, and does not consider a processor for fibers suitable for spinning. On the other hand, Japanese Laid-Open Patent Publication No. Hei 1-139874 discloses that the lignin in a plant fiber such as cotton or hemp is removed by a cellulolytic enzyme to retain flexibility, and the front end of the hemp fiber is described. Dissolve, round the front end and remove the corners to inhibit the skin irritation of hemp fiber. However, according to studies by the present inventors, it has been confirmed that although the use of cellulolytic enzymes is considered to have a certain degree of effect on cotton fibers, the surface of the hemp fibers is not processed to a spinning machine suitable for general spinning apparatuses. status. As described above, although the conventional hemp fiber treatment technique improves the feel of the surface of the fabric, it is not possible to adjust the physical properties of the fibers constituting the fabric to the state suitable for the spinning of the spinning device, and the present situation has not yet been obtained. A method for producing hemp fibers which can be industrially produced with high productivity.

An object of the first embodiment of the present invention is to provide a method for producing a hemp fiber for spinning which is soft and highly productive to be spun by a simple process. Another object of the present invention is to provide hemp fibers excellent in spinning properties. [Means for solving the problem]

The solution to the above problem includes the following embodiments. <1> A method for producing a hemp fiber for spinning, comprising the steps of: immersing a step of immersing the raw material hemp fiber at a temperature of from 60 ° C to 100 ° C to a component selected from the group consisting of a proteolytic enzyme and a starch hydrolyzing enzyme; In the group, at least one of the enzyme and water treatment liquid is used for 30 minutes to 60 minutes; in the water washing step, the hemp fiber obtained by the immersion treatment is washed with water; and the drying step is performed, and the hemp fiber obtained by washing is dried. <2> The method for producing a hemp fiber for spinning according to <1>, wherein the treatment liquid contains an alkaline agent. <3> The method for producing a hemp fiber for spinning according to <1> or <2>, wherein the pH of the treatment liquid is 9 or more and 13 or less.

<4> The method for producing a hemp fiber for spinning according to any one of <1> to <3>, after the water washing step, comprising a post-treatment step of immersing the washed hemp fiber in a material selected from the group consisting of The compound of at least one of the group consisting of sodium nitrobenzenesulfonate and sodium cyanurate is maintained in a water post-treatment solution at a temperature of from 60 ° C to 100 ° C for from 20 minutes to 50 minutes. <5> The hemp fiber for spinning is obtained by the method for producing a hemp fiber for spinning according to any one of <1> to <4>, and the fiber diameter is thinner and twisted than the raw material hemp fiber.捻, and has a fine fleece on the surface of the fiber. [Effects of the Invention]

According to the first embodiment of the present invention, it is possible to provide a method for producing a hemp fiber for spinning which is soft and highly productive to be spun by a simple process. According to another embodiment, hemp fibers excellent in spinning properties can be provided.

The present invention will be described in detail below. [Manufacturing method of hemp fiber for spinning] The manufacturing method of the hemp fiber for spinning according to the first embodiment of the present invention includes the following steps: an immersing step (hereinafter sometimes referred to as an enzyme treatment step), and the raw material hemp fiber is used. The temperature is from 60 ° C to 100 ° C, and is immersed in a treatment liquid (hereinafter sometimes referred to as an enzyme treatment liquid) containing at least one enzyme selected from the group consisting of a protease and a starch hydrolyzing enzyme. Heating for 30 minutes to 60 minutes; a water washing step (hereinafter sometimes referred to as a water washing step), washing the hemp fibers obtained by the immersion treatment; a drying step (hereinafter sometimes referred to as a drying step), which is washed with water The hemp fiber obtained is dried. In addition, in the present specification, "the raw material hemp fiber" means a hemp fiber which is a raw material of the hemp fiber for spinning before the respective processes in the method for producing the hemp fiber for spinning.

The effect of the present embodiment is not clear, but it is considered to be as follows: According to the production method of the present embodiment, the enzyme treatment liquid containing a specific enzyme such as a decomposable protein or starch is heated, and then the hemp fiber is heated. The immersion treatment is carried out in the enzyme treatment liquid, and the hemp fibers are swollen to make the water easily permeable. When the fiber is swollen with the enzyme treatment liquid, the enzyme penetrates with the water and stays between the fibers, and the lignin or the like existing between the celluloses swells and becomes easily removed, and the fibers become soft. By washing and drying the enzyme-treated fibers, lignin or the like existing between the celluloses is removed and the voids between the celluloses are fixed. Therefore, on the surface of the hemp fiber, fine lint is generated at the position where the lignin between the cellulose is removed, and a fine hollow portion is formed at the center of the hemp fiber, and the fiberization starts, as the The water is washed and dried after the immersion treatment of the enzyme treatment liquid, and the fibers are twisted. Therefore, it is inferred that hemp fibers which are piled and soft and have a twisted surface which is easy to be draped on the spinning device can be inferred. Since the enzyme used in the present embodiment is an enzyme which does not dissolve cellulose, there is no concern that the strength of the fiber is lowered by using an enzyme. In addition, this embodiment is not limited by the above-described inference mechanism.

Hereinafter, the method for producing the hemp fiber for spinning of the present embodiment will be described in order of steps. <Immersion treatment step> In the method for producing a hemp fiber for spinning according to the present embodiment, first, the raw material hemp fiber is contained in an enzyme containing at least one selected from the group consisting of a protease and a starch hydrolyzing enzyme. The water treatment liquid is subjected to immersion treatment. (Hemp fiber) Generally, hemp fiber means ramie and flax, but the hemp fiber in the present specification is not limited to the narrow hemp fiber. Any hemp fiber can be used as the raw material hemp fiber which can be applied to the method for producing the hemp fiber for spinning of the present embodiment. The hemp fiber in the present specification is used in the form of, for example, any hemp fiber derived from the plant hemp shown below. Specific examples include, for example, Cannabis sativa (also known as hemp), Linum usitatissimum, and cho ma (Boehmeria nivea var. nipononivea, also known as ramie). , karamushi), genus Hibiscus cannabinus (also known as yangma (youma)), genus Jute, Jute (Jewish genus, Corchorus capsularis), genus Jute, genus, genus (Corchorus olitorius) ), Musa textilis, Hibiscus cannabinus, Hibiscus esculentus L., Bombay hemp, Agave agave (Agave sisalana), cannabis, New Zealand flax, Phormium tenax, China grass, Tianmake jute, Taiwan jute (also Known as the long jute, Corohorus olitorius L.). Further, jute fiber obtained from jute or sorghum jute, that is, jute fiber, is also included in the hemp fiber in the present specification. Among the above-mentioned hemp fibers, the production method of the present embodiment is preferably used for hemp, ramie, linen, etc. from the viewpoint of industrial scale productivity and ease of obtaining raw materials.

The method for producing a hemp fiber for spinning according to the present embodiment is a straight cellulose fiber, that is, from the genus Cyperus malaccensis, Musa basjoo Sieb. et Zucc., the leaves of the banana, the leaves of the moon peach, the stem, and the papyrus. Fibers such as (papyrus), kapok, kazo, edgeworthia chrysantha, Diplomorpha sikokiana, bark, stems, leaves, etc. are also effective, especially hemp fiber. In this case, the productivity improvement effect is more remarkable.

The method of obtaining hemp fiber from a plant is not particularly limited, and a known method can be used. Usually, the plant (hemp) which is a raw material is immersed in water and an aqueous solution containing a drug such as an acid, and the fiber bundle is taken out, washed with water, and dried to obtain hemp fiber.

(Pretreatment of hemp fiber) In the production method of the present embodiment, first, the raw material hemp fiber is cut into a length of about 2 cm to 20 cm for ease of processing. The length may be appropriately determined depending on the characteristics of the hemp fiber used as the raw material, and it is preferably cut into about 2 cm to 15 cm. According to the production method of the present embodiment, the raw material hemp fiber of the long fiber can be used to improve flexibility and workability, and the conventional cutting length is usually 3.5 cm to 5.5 cm. However, for example, the material is cut into 7 cm to 13 cm. Hemp fiber can also be used. In general, the longer the fiber length, the more effective the skin irritation caused by the hemp fiber can be suppressed, and the applicability to the spinning device can be further improved. The length of the raw material hemp fiber is, for example, preferably about 8 cm to 12 cm for marijuana, about 3 cm to 6 cm for ramie, and about 2 cm to 5 cm for linen, but it is not limited to this. And so on.

It is preferable to immerse the cut raw material hemp fiber in water, and then immerse it in an enzyme-containing treatment liquid containing an enzyme. The raw material hemp fiber may be washed beforehand, and may be immersed in an aqueous solution containing an alkaline reagent such as a sodium hydroxide solution (hereinafter sometimes referred to as a base) in order to remove the contamination of the raw material hemp fiber. The aqueous solution of the reagent is then washed with water. The aqueous solution containing an alkaline agent used in the pretreatment of the raw material hemp fiber is intended to remove the dirt adhering to the fiber, and therefore the concentration of the alkaline agent is preferably 3% by mass to 10% by mass. The immersion of the hemp fiber as a raw material for washing to an aqueous solution containing an alkaline agent can be performed at a temperature of 10 ° C to 25 ° C before and after the temperature of the water used for preparing the aqueous solution without heating the aqueous solution containing the alkaline agent. Alternatively, the aqueous solution containing the alkaline agent may be heated to a temperature of about 80 ° C. The immersion time is preferably from about 40 minutes to 120 minutes in the case where the aqueous solution is not heated, and is preferably from about 20 minutes to 40 minutes in the case of heating.

Hereinafter, the components contained in the enzyme treatment liquid used in the immersion treatment step will be described. (An enzyme selected from the group consisting of a proteolytic enzyme and a starch hydrolyzing enzyme) The enzyme used in the preparation of the enzyme treatment liquid used in the immersion treatment step is preferably the following protease and starch. Hydrolyzed enzymes. [A] Proteolytic enzymes In the case of proteolytic enzymes, a proteolytic enzyme classified as a cysteine protease can be used in the present invention. Specifically, for example, pineapple protease (which may be called pineapple enzyme) contained in pineapple or the like, actinidain contained in kiwi, figin (ficin) contained in fig, and papaya are included. Papain and the like as a proteolytic enzyme. Among them, pineapple protease and papain are preferable in view of the effect. The proteolytic enzyme can be obtained in the form of a test drug, a papaya enzyme powder used for cosmetics, foods, and the like. Further, the proteolytic enzyme can also be obtained by fermenting an enzyme-containing fruit or the like, or extracting it from the raw juice of the fruit. Examples of commercially available products include BROMELAIN 1000 GPU (trade name, Jarrow Formulas), BROMELAIN powder (trade name, Life Extension quality Supplements and Vitamins. Ink), and the like. The enzymes of these commercial products are formed into tablets and powders, and can be dissolved in a solvent such as water to be used in an enzyme treatment solution.

[B] Starch hydrolyzing enzyme Amylase, diasaccharase or the like may be mentioned as a starch hydrolyzing enzyme. Starch hydrolase can be obtained in the form of a reagent.

(Solvent) Water should be used as a solvent for the enzyme treatment solution. Only water can be used as a solvent. For the purpose of softening the fiber, the solvent, that is, the water, may further contain citric acid or the like in an amount of 2% by mass to 10% by mass based on the total amount of the solvent.

(Additive) In addition to the enzyme and the solvent containing water, the enzyme treatment solution may contain various additives in accordance with the purpose without impairing the effects of the embodiment. An alkaline reagent or the like can be cited as an additive. Considering the idea of promoting the penetration of enzymes into hemp fibers, it is desirable to have an alkaline reagent in the enzyme treatment solution. Sodium hydroxide, potassium hydroxide, sodium sulfate, lime, etc. are mentioned as an alkaline reagent. The alkaline reagent can also be added to the enzyme treatment solution in the form of an aqueous solution. By setting the pH of the enzyme treatment solution to an alkaline reagent and setting the pH to 9 or more and 13 or less, it is preferably 11 or more and 13 or less, and the permeability of the enzyme to the raw material hemp fiber is enhanced, and the alkaline reagent is further improved. The solubility of the quality of the hemp fiber is improved, and the softness of the obtained hemp fiber is further enhanced to promote the generation of surface pile. Moreover, since the alkaline reagent is used in combination, even if the time of immersion in the enzyme treatment liquid is short, there is an advantage that a suitable hemp fiber for spinning can be obtained.

(Preparation of enzyme treatment liquid) A solvent having a mass ratio of 5 to 20 times the mass of the raw material hemp fiber is placed in a container, and the liquid temperature is set to 60 ° C to 100 ° C, and then added to the protein degrading enzyme and starch. The enzyme of the hydrolyzed enzyme is prepared, and the enzyme treatment liquid is prepared by sufficiently stirring. The period in which the enzyme treatment solution contains the additive to be used as desired is arbitrary, and may be added to the enzyme before the addition of the enzyme or after the addition of the enzyme. The enzyme treatment solution may contain one or more of the aforementioned enzymes. The total amount of the enzyme in the enzyme treatment liquid is preferably from 3 parts by mass to 10 parts by mass per 100 parts by mass of the raw material hemp fibers, and more preferably from 3 parts by mass to 5 parts by mass per 100 parts by mass of the fibers.

(Immersion Treatment) The raw material hemp fiber which has been subjected to pretreatment such as washing is immersed in the prepared enzyme treatment liquid. The liquid temperature of the enzyme treatment solution is maintained at a temperature of 60 ° C to 100 ° C, and the cut raw material hemp fiber is immersed for 30 minutes to 60 minutes. From the viewpoint of the effect, the liquid temperature of the enzyme treatment liquid at the time of immersion is preferably from 70 ° C to 90 ° C. The immersion time is preferably from 35 minutes to 60 minutes.

In order to make the hemp fiber and the enzyme sufficiently contact during the immersion and to promote the penetration of the enzyme treatment liquid into the fibers, it is preferable to impregnate the hemp fiber while stirring the enzyme treatment liquid. In view of this point, the enzyme impregnation treatment of hemp fiber is preferably carried out using a container or apparatus with a stirring device. From the viewpoint of maintaining the temperature condition at the time of immersion and performing the stirring, it is also preferable to use a known dyeing machine, that is, a washing machine, a dipping machine, an obermaier dyeing machine, or the like in the immersion treatment. Further, by supplying air to the enzyme treatment liquid and performing air pumping, the treatment liquid can be promoted to penetrate into the hemp fiber. Although the immersion treatment is carried out using a container or a device having a temperature adjustment function, it is preferably a type, but is not particularly limited by the above. The temperature adjustment of the enzyme treatment liquid can be carried out by a known method such as heating from the outside of the container and heating by a push-on heater or the like.

<Water washing step> The hemp fiber impregnated in the enzyme treatment liquid is taken out from the container containing the enzyme treatment liquid, and then subjected to a water washing step. The water washing liquid used in the water washing step may be an aqueous only water washing liquid, or may be a water washing liquid containing a known additive in addition to water as desired. Tap water can also be used for the water in the water washing step. In the water washing step, the hemp fibers are sufficiently washed with water to remove the treatment liquid remaining in the surface of the fibers, the voids in the fibers, an alkaline agent, and the like.

The aqueous wash used in the water washing step may contain a surfactant. By containing a surfactant, the washing liquid further enhances the washing effect of removing the components remaining between the fibers. After washing with a water-washing liquid containing a surfactant, it is preferred to wash the water with a water-washing liquid containing no surfactant and remove the surfactant from the fibers. The water washing can be carried out by running water or by stirring in a container filled with water. When the water washing is carried out in a container, it is preferred to change the water at least once or twice.

<Post-Processing Step> After the water-washing step, the hemp fiber from which the enzyme treatment liquid has been removed is subjected to a drying step described later. It is preferred to carry out a post-treatment step before drying, and by performing a post-treatment step, the voids and the napped state of the hemp fibers formed by swelling due to the enzyme can be immobilized and the hemp fibers having appropriate physical properties can be obtained by spinning. The post-treatment is performed by immersing the washed hemp fiber in a compound containing at least one selected from the group consisting of sodium nitrobenzenesulfonate and sodium cyanurate (hereinafter sometimes referred to as a post-treatment agent). It is carried out for 20 minutes to 50 minutes with the water after treatment, while maintaining the liquid temperature at 60 ° C to 100 ° C. Sodium nitrobenzenesulfonate and sodium cyanurate are known as dye stabilizers and are commercially available. The post-treatment liquid may contain one type of post-treatment agent, or may contain two types. The total content of the post-treating agent in the post-treatment liquid is preferably from 2% by mass to 10% by mass, more preferably from 2% by mass to 4% by mass.

The effect of the post-treatment step is not clear, but it is presumed as follows: It is considered that the hemp fiber treated with the enzyme in the immersion treatment step uses at least one selected from the group consisting of sodium nitrobenzenesulfonate and sodium cyanurate. The interaction between the acidic group of the compound, sodium nitrobenzenesulfonate and sodium cyanurate and the water contained in the hemp fiber forms a hydrogen bond, and is combined with the voids and hemp fibers in the hemp fiber formed by swelling. The surface is raised to effectively maintain the form. The hemp fiber subjected to the post-treatment step is washed with water to remove the post-treatment liquid, and subjected to a drying step.

<Drying Step> The hemp fibers subjected to the immersion treatment step, the water washing step, and the post-treatment step to be carried out in the enzyme treatment liquid are dried to obtain hemp fibers for spinning. Drying of the fibers can be carried out by a usual method. For example, a known type of belt dryer, a belt dryer, a fiber tumble dryer, a non-contact type dome dryer using infrared rays, a microwave oven or the like, which uses an electromagnetic wave dryer, or the like can be used as the drying device. The drying temperature is preferably from about 90 ° C to 180 ° C in terms of ambient gas temperature. When directly dried by electromagnetic waves, the temperature of the hemp fiber is heated to about 100 °C. The hemp fiber does not need to be dried to an absolute dry state in the drying step, and may be set to a dry state to the extent that it is stored or used in the spinning apparatus without hindrance.

The hemp fiber obtained by the method for producing a hemp fiber for spinning according to the present embodiment is twisted by the fine voids between the fibers, and is soft and has a large amount of fine pile on the surface. Therefore, when it is used in a general-purpose spinning device, the detachment of the fiber is suppressed, and the crepe of the hemp fiber can be obtained with good productivity. The obtained hemp fiber for spinning is supplied to a spinning device by carding a sliver according to a usual method.

<Hemp fiber for spinning> The hemp fiber for spinning obtained by the method for producing a hemp fiber for spinning according to the present embodiment has a fiber diameter smaller than that of the raw hemp fiber, and has a twist on the fiber surface. Fine fleece. In other words, the hemp fiber for spinning of the present embodiment is obtained by removing lignin or the like contained in the raw material hemp fiber, and the collected fine fibers are separated into a separated shape, and it is observed that the fiber diameter is finer than that of the raw material hemp fiber. Fiber. In addition, since the fibers are twisted and provided with stretchability, and are soft and have a large amount of fine piles on the surface, when used in a general spinning device, the fibers are prevented from falling off and productivity is formed. Good and uniform crepe.

The shape, appearance, and cross section of the hemp fiber for spinning can be observed by an optical microscope. The magnification when observed by an optical microscope is preferably 300 to 1500 times, but it is not particularly limited by the magnification. For example, when observing the whole of the hemp fiber for spinning, it is suitable to observe the system at a magnification of about 300 to 400 times, and when observing the napped state and the cross section of the surface, the observation is performed at a magnification of about 1,000 to 1,500 times. Suitable. The optical microscope photograph used for the hemp fiber for spinning of the present embodiment was entrusted to the Tokyo Metropolitan Industrial Technology Research Center of the Tokyo Metropolitan Industrial Technology Research Center.

Since the hemp fiber for spinning of the present embodiment has flexibility which is not seen in the conventional hemp fiber, it is possible to easily obtain a uniform twist yarn having a finer yarn count than the conventional hemp fiber. Therefore, it can be applied to various final products such as thin and soft clothes, shirts, and scarves which have been difficult to form with hemp fibers. [Examples]

Hereinafter, the present embodiment will be described more specifically by way of examples, but the present embodiment is not limited to the examples.

[Example 1] Raw material hemp fiber, that is, hemp, was cut into a length of 11 cm. Prepare 100g of cut hemp fiber. 2 kg (2 liters) of water was placed in a stainless steel container, and 5 g of pineapple enzyme (a powder obtained by pulverizing a tablet of Jarrow Formulas, BROMELAIN 1000 GPU (trade name)) was placed, and the mixture was thoroughly stirred to prepare an enzyme treatment solution. A. The enzyme treatment liquid A was heated to 80 ° C, and 100 g of the prepared hemp fibers were immersed in the enzyme treatment liquid A, and kept at a liquid temperature of 80 ° C for 30 minutes. Thereafter, the hemp fiber was taken out from the enzyme treatment liquid, washed with running water, and gently wrung out, and then placed in a 20-day nylon mesh bag, and dried by a tumble dryer for 45 minutes to obtain a spinning hemp for Example 1. fiber.

It was confirmed by visual observation and functional evaluation by touch, and it was confirmed that the obtained hemp fiber for spinning of Example 1 was softer and bulky than the hemp fiber before processing, and the touch was improved. The obtained hemp fiber for spinning of Example 1 was observed by an optical microscope (magnification: 400 times), and it was confirmed that surface fibrillation due to cross-cutting or splitting was observed on the side surface of the fiber, and yarn was produced. Slightly twisted and bent. Further, in the observation of the cross section of the yarn, it was confirmed that the hollow portion was formed in the fiber, and the outer edge thereof was expanded more than before the processing.

[Example 2] Hemp fibers, that is, hemp, were cut into a length of 11 cm. Prepare 100g of cut hemp fiber. 2 kg (2 liters) of water was placed in a stainless steel container, and 5 g of the same pineapple enzyme and 4 g of a 25% by mass aqueous sodium hydroxide solution which were the same as the pineapple enzyme used in Example 1 were placed, and the mixture was stirred well to prepare an enzyme treatment solution. B. The hemp fiber for spinning of Example 2 was obtained in the same manner as in Example 1 except that the above-described enzyme treatment liquid B to which sodium hydroxide was added was used.

It was confirmed by visual observation and functional evaluation by touch, and it was confirmed that the obtained hemp fiber for spinning of Example 2 was softer and bulky than the hemp fiber before processing, and the touch was improved. The obtained hemp fiber was observed by an optical microscope (magnification: 400 times), and it was confirmed that the surface of the fiber was observed to have a surface due to the cut yarn or the split yarn, and the yarn was slightly twisted. . Further, in the observation of the cross section of the yarn, it was confirmed that the hollow portion was formed in the fiber, and the outer edge thereof was more swollen than before the processing, and the difference in the hemp fiber for spinning of Example 1 was not observed.

[Example 3] Hemp fibers, that is, hemp, were cut into a length of 11 cm. Prepare 100g of cut hemp fiber. 2 kg (2 liters) of water was placed in a stainless steel container, and 5 g of the same pineapple enzyme as the pineapple enzyme used in Example 1 and 3 g of citric acid were placed, and the mixture was stirred well to prepare an enzyme treatment liquid C. 100 g of the prepared cannabis was immersed in the enzyme treatment liquid C, and the enzyme treatment liquid C was heated from room temperature to 80 ° C with stirring for 10 minutes using a stainless steel rod having a diameter of 2 cm. The liquid temperature was maintained at 80 ° C and the stirring was continued for 30 minutes. After 20 minutes from the start of the agitation, the hemp in the enzyme treatment liquid C was finely dispersed into a cotton shape and became entangled with a stainless steel stirring rod. After immersing and stirring for 30 minutes, the hemp fiber was taken out from the enzyme treatment liquid C, washed with running water and gently wrung out, and then placed in a 20-day nylon mesh bag and dried by a tumble dryer for 45 minutes to obtain Example 3 Hemp fiber for spinning. The obtained hemp fiber was observed under an optical microscope (magnification: 400 times), and it was observed that the surface of the fiber had surface blanching due to cross-cutting or cracking. Further, the fibers were spun in a finer shape than the hemp fibers of the spinning obtained in Example 2 by stirring, and more surface lint than the hemp fibers for spinning obtained in Example 2 was observed.

[Example 4] 15 g of the raw yarn of the hemp sliver was cut into a length of 10.5 cm. 500 g of water was placed in a stainless steel container, and 2 g of papaya enzyme (Life Extension quality Supplements and Vitamins. Ink, papaya enzyme: trade name) was placed in a container, and the mixture was thoroughly mixed to prepare an enzyme treatment liquid D. 15 g of the prepared hemp sliver original yarn was immersed in the enzyme treatment liquid D, the enzyme treatment liquid D was warmed to 80 ° C, and the liquid temperature was maintained at 80 ° C for 30 minutes. After immersing, the hemp fiber was taken out from the enzyme treatment liquid D, washed with running water and gently wrung out, and then placed in a 20-day nylon mesh bag, and dried by a tumble dryer for 45 minutes to obtain a spinning hemp for Example 4. fiber. The obtained hemp fiber was observed under an optical microscope (magnification: 400 times), and it was observed that the surface of the fiber had surface blanching due to cross-cutting or cracking. Moreover, in the observation of the cross section of the yarn, it was confirmed that the hollow portion was formed in the fiber, and the aggregate was composed of fibers having a finer fiber diameter than the raw material before the processing, and the outer edge of the aggregate of the fibers was larger than the raw material hemp fiber. The fiber diameter is more swollen

[Example 5] 15 g of the raw yarn of the hemp sliver was cut into a length of 10.5 cm. The same enzyme treatment liquid D as in Example 4 was prepared by placing 500 g of water in a stainless steel container and placing 2 g of the papaya enzyme used in Example 4, followed by thorough mixing. 15 g of the prepared hemp sliver original yarn was immersed in the enzyme treatment liquid D, the enzyme treatment liquid D was warmed to 80 ° C, and the liquid temperature was maintained at 80 ° C for 30 minutes.

After immersing, the raw yarn of the hemp sliver is picked up from the stainless steel container, the enzyme treatment liquid contained in the stainless steel container is removed, and the container is washed with water, and then 500 g of new water and 2 g of sodium nitrobenzenesulfonate are placed in a stainless steel container. The mixture was thoroughly stirred to prepare a post-treatment liquid. 10 g of the hemp sliver original yarn picked up from the enzyme treatment liquid D was placed in the post-treatment liquid, and the liquid temperature was warmed to 60 ° C, and then the temperature was maintained at 60 ° C while immersing for 20 minutes to carry out post-treatment.

After the post-treatment step, the hemp fibers were washed with running water and gently wrung out, and then placed in a 20-day nylon mesh bag and dried by a tumble dryer for 45 minutes to obtain a hemp fiber for spinning of Example 5. The obtained hemp fiber was observed under an optical microscope (magnification: 400 times), and it was observed that the surface of the fiber had surface blanching due to cross-cutting or cracking. Moreover, in the observation of the cross section of the yarn, it was confirmed that the hollow portion was formed in the fiber, and the aggregate was composed of fibers having a finer fiber diameter than the raw material before the processing, and the outer edge of the aggregate of the fibers was larger than the raw material hemp fiber. The fiber diameter is more swollen. Further, when the hemp fiber obtained in Example 4 was compared with the hemp fiber obtained in Example 5, the cross-sectional diameter of the yarn was larger in the hemp fiber of Example 5, and it was considered that the void in the fiber was further improved by performing the post-treatment step. expand.

From this result, it is understood that the shape of the fiber swollen by the immersion treatment step by the enzyme treatment liquid is maintained in a more favorable state by performing the post-treatment step. It is considered that this is because the post-treatment liquid is used to form a hydrogen bond interaction between the expanded portions of the cellulose fibers, and thus the shape of the fibers and the shape of the pile are maintained after dehydration and drying.

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Claims (5)

A method for producing a hemp fiber for spinning, comprising the steps of: immersing a step of immersing the raw material hemp fiber at a temperature of from 60 ° C to 100 ° C in a group selected from the group consisting of a proteolytic enzyme and a starch hydrolyzing enzyme; At least one of the enzyme and water treatment liquid is used for 30 minutes to 60 minutes; the water washing step is performed to wash the impregnated hemp fiber; and the drying step is performed to dry the washed hemp fiber. The method for producing a hemp fiber for spinning according to the first aspect of the invention, wherein the treatment liquid contains an alkaline agent. The method for producing a hemp fiber for spinning according to the first aspect of the invention, wherein the pH of the treatment liquid is 9 or more and 13 or less. The method for producing a hemp fiber for spinning according to the first aspect of the patent application, after the water washing step, comprising a post-treatment step of immersing the washed hemp fiber in a content selected from the group consisting of sodium nitrobenzenesulfonate and three At least one compound of the group consisting of sodium polycyanate and the water post-treatment liquid are kept at a temperature of 60 ° C to 100 ° C for 20 minutes to 50 minutes. A hemp fiber for spinning is obtained by the method for producing a hemp fiber for spinning according to the first application of the patent application. The fiber diameter is finer and twisted than the raw material hemp fiber, and has fineness on the fiber surface. Flocking.