KR102185434B1 - A method of producing eco-friendly hemp fibers including enzymatic treatment step - Google Patents

Abstract

The present invention relates to a production method of eco-friendly hemp fibers, comprising an enzyme treatment step and a microorganism treatment step and, more specifically, to a production method of eco-friendly hemp fibers, which solves a problem of functional destruction of the fibers.

Description

Eco-friendly hemp fiber manufacturing method including enzyme treatment {A METHOD OF PRODUCING ECO-FRIENDLY HEMP FIBERS INCLUDING ENZYMATIC TREATMENT STEP}

The present invention relates to a method for producing eco-friendly hemp fiber comprising an enzyme treatment step and a microorganism treatment step.

Hemp fiber is manufactured using bast fiber inside the hemp bark, a one-year plant belonging to the Moraceae family. It absorbs and discharges moisture quickly, blocks ultraviolet rays, and has antibacterial and anti-toxic properties. Has. It is also used to make ropes, nets, tires, etc. in addition to fabrics because of its excellent stiffness and durability.

In particular, Andong hemp is sown in late February, harvested in late June to early July, and then ripped in accordance with the face of the face, and then washed one by one. The hemp as described above is called fresh ginseng, and the hemp is squeezed with only the inner skin, and the outer skin of the fresh ginseng is manually removed.

Andong hemp is a non-polluting natural fiber fabric woven in a natural state without any chemical treatment during the production process. It is durable against friction and has a long lifespan.

The hemp fiber obtained from hemp contains 70-74% cellulose, 17.9-22.6% hemicellulose, 3.7-5.7% lignin, 0.9% pectin, and contains lipid components. The wax layer consisted of 0.8%. Hemicellulose, the most impurity component in hemp, is composed of a number of complex polysaccharides, and acts as a bridge that strengthens the binding of fiber and lignin. The reason for degumming the hemp is to remove the components of the hemicellulose, pectin, lignin and wax layers, except for fiber.

The presence of such impurities degrades the physical properties of hemp fabric, processing and dyeing effects, so a refining process is essential to use it as a clothing material. The degumming method of hemp fiber has been using alkaline chemicals such as caustic soda (NaOH), sodium bicarbonate (NaHCO ₃ ) and sodium carbonate (Na ₂ CO ₃ ). This method damages the hemp fiber component It reduces the original functionality and causes the problem of environmental pollution by strong alkaline wastewater.

The traditional method of fresh ginseng must be manually processed one by one, and the method of using caustic soda has the above problems. Furthermore, since the existing type of hemp thread is too thick, most of them are made of veterinary clothes, and there is a limitation that it is difficult to manufacture ready-to-wear clothes, so continuous research is required.

Korean Patent Registration No. 10- 1474348

Chinese folklore encyclopedia titled “Hemp”

It is an object of the present invention to provide an eco-friendly hemp fiber manufacturing method and hemp fiber including an enzyme and microbial treatment process.

One aspect of the present invention is (a) the step of adding 10 to 20 times by weight of purified water to the hemp skin washed by cutting into a size of 3 to 6 cm for 24 hours;

(b) steaming step of heating the soaked hemp husk at 60 to 120°C for 1 to 5 hours;

(c) allowing the hemp husks subjected to the steaming step to cool sufficiently at 35° C. for 3 to 5 hours;

(d) a pre-treatment step of adding malt to the hemp skin and leaving it for 24 to 48 hours at room temperature; And

(e) adding 5 to 10 parts by weight of Bacillus subtillis with respect to 2 to 30 parts by weight of the hemp skin on which the pretreatment step is completed, and incubating with shaking at 25 to 40° C. for 12 to 48 hours; It provides a method for producing a hemp fiber comprising a.

In the present invention, the "burlap fiber" means that it is manufactured from cellulose fibers present in the hemp skin, and in addition to hemp, hemp crops such as flax, jute, rapoma, blue hemp, red hemp, gumma, manila ginseng, sisal ginseng, New Zealand ginseng It refers to a kind of vegetable fiber produced in a fibrous form after components such as pectin and lignin are removed through a refining process from the stem or leaf of

In general, hemp is also called hemp or hemp, and hemp is an annual herb of the hemp family and grows in temperate and tropical regions. It is cultivated mainly for the purpose of textiles, and has been used habitually all over the world since the Paleolithic period, and has been used as a material for clothing and bedding in Korea since Gojoseon.

Hemp is known to have antibacterial and anti-toxic functions that absorb and discharge moisture quickly, block UV rays, and inhibit mold, and is used to make ropes, nets, and tires in addition to fabrics because of its strong and durable properties.

In particular, Andong hemp is sown in late February, harvested in late June to early July, and then ripped in accordance with the face of the face, and then washed one by one. This is called raw nabe hemp, and he squeezes hemp with only the inner skin, and relies on the traditional method of removing the outer husks of fresh naenggi by hand.

In order to manufacture the above-described burlap fiber, components such as pectin and lignin in the film that are stuck to the cortex and fiber must be decomposed and removed.Mainly, after steaming or steaming them to remove them, strong alkali chemicals such as caustic soda (NaOH) It had to go through a refining process that was processed using. However, such a refining method using strong alkaline chemicals has not only incomplete removal of pectin and lignin, but also affects the physical properties and functionality of bast fibers, and at the same time has caused pollution problems due to discharge of industrial wastewater.

The method for producing hemp fiber of the present invention is characterized in that it is possible to produce finer and more elastic fibers than the traditional fresh-cress method without using caustic soda or lye at all. In addition, by omitting the process of treating the lye, excellent antibacterial and deodorizing effects may be exhibited.

Specifically, the malt in the step (d) may be one to add 1 to 15 parts by weight of malt based on 100 parts by weight of hemp husk, but is not limited thereto.

In addition, the method of manufacturing the hemp fiber may further include a post-treatment process of immersing in hot water at 80° C. or higher containing a nonionic surfactant and maintaining for 30 minutes after the step (e) is completed.

Specifically, in the post-treatment process, the raw materials that have undergone the refining process are immersed in hot water immediately after the refining process and maintained for a certain period of time, and in this case, a circulating high-pressure cleaning process using a cleaning solution containing a nonionic surfactant as needed. You can also impose. Any of the nonionic surfactants commonly used in this technical field may be used, for example, poly(oxyethylene) tridecyl ether, poly(oxyethylene) lauryl. Ether (Poly (oxyethylene) lauryl ether), poly (oxyethylene) stearyl ether (Poly (oxyethylene) stearyl ether) may be used, but is not limited thereto.

Specifically, after the post-treatment process, 5-10 parts by weight of 1% sodium hydroxide (NaOH), 1% sodium bicarbonate (NaHCO ₃ ) and 1% sodium carbonate (Na ₂ CO ₃ ) were added to adjust the pH to 10-11. It may be bleached at room temperature by adding to 3 parts by weight of 2.5% H ₂ O ₂ or bleaching for 50 to 70 minutes while heating at 60 to 90°C. However, this process is not an essential process but can be added as needed, and can be appropriately changed and applied as needed.

In addition, specifically, after the step (d) is completed, before the start of step (e), it may further include a sterilization and sterilization process maintained for 10 to 180 minutes at a pressure of 1 to 3 bar and a state of 80 to 300°C. have. This is to maximize the activity of microorganisms before going through the microorganism treatment step (e). Specifically, after storing the hemp husk on which the pretreatment step has been completed in a high temperature and high pressure container, about 80 to 300°C, 1 to 3 bar for 10 to 180 minutes, specifically about 100 to 130°C, 1.3 to It may be treated for 15 to 30 minutes at 1.7 bar, but is not limited thereto.

Another aspect of the present invention provides a hemp fiber manufactured through the above method.

By omitting the process of treating the lye fiber, it was confirmed that the antibacterial and deodorizing functions, which are the unique functions of the burlap fiber, are maintained (Table 2), and as a result of sensory tests for softness, breathability, comfort, and drape property, conventional raw radish and It was confirmed that not only the hemp produced by the insulin method but also the presence or absence of malt treatment showed a remarkably superior overall preference than other hemp fibers.

The burlap fiber of the present invention undergoes an enzyme treatment process and a microbial treatment process in the manufacturing process, so it is not only thinner and softer than the yarn produced by the traditional manual method, but also the functional destruction of the fiber itself caused by the blade radish method using caustic soda. And it is characterized by solving the problem of environmental pollution.

In addition, the fabric woven from the hemp fiber produced by the above method exhibits excellent satisfaction in various aspects such as softness, breathability, and comfort, and can be usefully used in various adult clothes, children's clothes, and underwear.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

Hereinafter, the present invention will be described in detail by examples. However, the following examples are only illustrative of the present invention, and the present invention is not limited by the following examples.

Example 1. Manufacturing process of hemp fiber using malt and microorganisms

Prior to manufacturing the hemp fiber, all materials were prepared in a washed state to remove contamination such as foreign matter and mold.

The dried hemp husk was cut into a constant size of 3 to 6 cm, and 10 to 20 times the weight of purified water of the hemp husk was added, followed by a so-called process for 24 hours. The hemp husk on which the soaking step was completed was heated in water at 90 to 100° C. for 2 to 4 hours (steaming step). Thereafter, the hemp husks subjected to the steaming step were allowed to stand for 3 to 5 hours until sufficiently cooled down at 35°C.

Based on 100 parts by weight of the hemp skin, 1 to 15 parts by weight of malt was added, and left to stand at room temperature for 24 to 48, followed by a pre-treatment process of decomposing pectin or lignin contained in the hemp skin.

The hemp skin on which the pre-treatment process was completed was subjected to refining using Bacillus subtillis , a microorganism obtained from rotten onion skin. Specifically, with respect to 2 to 30 parts by weight of the hemp skin, 5 to 10 parts by weight of Basilis subtilis was added and cultured with shaking at 25 to 40°C for 12 to 48 hours.

The hemp husk on which the refining process was completed was finally subjected to a post-treatment process of immersion in hot water. For the post-treatment process, the hemp husk was placed in a container maintained at 100° C. and subjected to steam treatment for 30 minutes to obtain burlap fibers.

Comparative Example 1. Manufacturing process of hemp fiber not treated with malt

Hemp fibers were prepared in the same manner, except that the malt treatment process was omitted in the manufacturing process of the hemp fibers prepared in Example 1.

Comparative Example 2. Hemp fiber manufactured by the traditional method (fresh radish)

The hemp fiber manufactured in the traditional way is also known as raw cold hemp, and hemp is made by peeling the outer skin of hemp from the beginning, then hemp with only the inner skin, placing it on the knee when making warp and twisting it with the palm of the hand. The raw radish is typical of Andongpo in Andong, Gyeongsangbuk-do, and the fresh radish hemp is characterized in that no lye (Na ₂ CO ₃ ) is used in the manufacturing process. In Comparative Example 2 of the present invention, fresh cold hemp fiber manufactured in a traditional Andong region was used.

Comparative Example 3. Hemp fiber prepared using lye

It is characterized by the fact that hemp is made from lye and is cooked in lye (Na ₂ CO ₃ ) (by maturing) without peeling off the fiber-free outer shell of hemp. do. In Comparative Example 3 of the present invention, hemp fiber made by the same method as the commercially available hemp was used.

Experimental Example 1. Comparative experiment on the difference in thickness of fibers according to the manufacturing method

In order to compare the difference in thickness of the fibers according to the manufacturing method of the present invention, comparison of the average thickness of the fibers manufactured by the methods of Examples and Comparative Examples was performed, respectively.

Specifically, the thickness of the fibers prepared by the method of Example 1 and Comparative Examples 1 to 3 was measured using a microscope, and the results are shown in Table 1 below.

Experimental composition Fiber thickness Example 1 8 ~ 15 um Comparative Example 1 15 ~ 25 um Comparative Example 2 25 ~ 40 um Comparative Example 3 10 ~ 30 um

As shown in Table 1, it was confirmed that the thickness of the fresh cold hemp, which is a traditional method of manufacturing by hand, is very thick when compared with the Examples and Comparative Examples. In addition, compared with Comparative Example 3 prepared by the general method of treating lye, the thickness of the hemp (Example 1 and Comparative Example 1) including the microbial treatment process can be generally thinned, and in particular, it is possible to treat malt. It was confirmed that the hemp fiber of Example 1, which further includes a process, can be produced significantly thinner when compared to Comparative Example 1 that is not treated with the traditional method of fresh cold hemp and malt.

The thickness of the hemp fiber of Example 1 is only similar to that of cotton or wool, suggesting that it is possible to manufacture a general ready-made garment that could not be manufactured due to the thick thickness of the hemp manufactured by the traditional method.

In addition, the present inventors have found that the above result is that the effect of the subsequent microbial treatment step is significantly increased because the process of enzymatic decomposition of lignin present in the hemp skin is additionally included by treating malt prior to the refining process for treating microorganisms. It was confirmed.

Experimental Example 2. Experiment to confirm whether or not to maintain functionality according to the manufacturing method

In order to compare whether the original functionality of the hemp fiber is maintained according to the manufacturing method, the antimicrobial properties and deodorization functions of the fibers manufactured by the methods of Examples and Comparative Examples were compared.

Whether or not the antimicrobial properties of the present invention are maintained were compared by measuring the antimicrobial properties by KSK-0693. Specifically, 1 x 10 ⁷ Staphylococus aureus as a measurement target on the burlap fibers of Example 1 and Comparative Examples 1 to 3 sterilized at 121°C in a high temperature and high pressure sterilizer (autoclave) After inoculation and incubation for 18 hours, the reduction rate of bacteriostatics was measured in% as compared to the standard cotton cloth, and is shown in Table 2 below.

In addition, for the comparison of the deodorizing power of the present invention, 10 g of each of the fibers of Example 1 and Comparative Examples 1 to 3 were put in a sealed container, and ammonia (NH ₃ ), which is a gas emitting odor, was injected, and then 60 minutes elapsed. The degree of reduction of the ammonia concentration after the treatment was measured and shown in Table 2 below.

division Antimicrobial (%) Deodorization rate (%) Example 1 99.3 51 Comparative Example 1 99.3 49 Comparative Example 2 95.1 50 Comparative Example 3 16 20

As shown in Table 2, in Example 1 and Comparative Examples 1 and 2, in which no chemical treatment was performed because no lye was used, it was confirmed that the inherent functionality of the hemp fiber was maintained, but the lye was used for the ice-cooled method. It was confirmed that the intrinsic functionality of the hemp fiber was substantially destroyed during chemical treatment.

Experimental Example 3. Measurement of overall preference of fabric woven with fibers

A sensory test was conducted by selecting 24 adults in their 20s to 60s with respect to the overall preference of the material woven using each of the burlap fibers prepared in the above Examples and Comparative Examples.

The overall preference of the fabric made from the fibers of the present invention was measured for softness, breathability, comfort, and drape as a sensory test. The drape property refers to the degree of suppleness of the fabric, and refers to the characteristic of slackening in shape by harmonizing appropriate elasticity and softness. A 10-point scoring method was used for the rating, and the higher the preference, the higher the score was given. The results are shown in Table 3 below.

Item Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Soft 9.4 8.2 7.8 8.3 Breathable 8.4 8 9.4 7.3 Comfort 8.6 8.1 8.3 7.6 Drape castle 9.5 9.2 7.8 7.6 Overall preference 9.0 8.4 8.3 7.7

As shown in Table 3, it was confirmed that both the Examples and Comparative Examples of the present invention showed high satisfaction as a fabric woven with hemp, which is a high-quality textile product.

Specifically, Example 1 prepared by the manufacturing method of the present invention showed a particularly high satisfaction in softness and drape property, and the highest score was also shown in the comfort item considered to contain a comprehensive feeling that touches the skin. . The fresh radish hemp of Comparative Example 2 prepared by the traditional method had superior breathability due to the thick fiber, but the overall preference showed a significant difference compared to Example 1, and Comparative Example 1 without malt treatment showed all items in general. It was confirmed that the satisfaction was little by little less than in Example 1. It was confirmed that the bladecress hemp of Comparative Example 3 including the process of processing using lye showed a special difference in the subjective satisfaction that could not be confirmed in the previous experimental example.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

Claims (6)

(a) adding 10 to 20 times by weight of purified water to the washed hemp skin by cutting into 3 to 6 cm size and soaking for 24 hours;
(b) steaming step of heating the soaked hemp husk at 60 to 120°C for 1 to 5 hours;
(c) allowing the hemp husks subjected to the steaming step to cool sufficiently at 35° C. for 3 to 5 hours;
(d) a pre-treatment step of adding malt to the hemp skin and leaving it for 24 to 48 hours at room temperature; And
(e) adding 5 to 10 parts by weight of Bacillus subtillis with respect to 2 to 30 parts by weight of the hemp skin on which the pretreatment step is completed, and incubating with shaking at 25 to 40° C. for 12 to 48 hours; As a method for producing a hemp fiber comprising,
After the step (e) is completed, further comprising a post-treatment process of immersing in hot water at 80°C or higher containing a nonionic surfactant and maintaining for 30 minutes,
After the step (d) is completed, the method of producing hemp fiber further comprises a sterilization and sterilization process maintained for 10 to 180 minutes at a pressure of 1 to 3 bar and a state of 80 to 300°C before the start of step (e) . delete The method of claim 1,
After the post-treatment process is completed, further comprising a process of bleaching while heating at 60 to 100°C. delete Made by the method of claim 1, hemp fiber. The method of claim 5,
The burlap fibers are those that exhibit antibacterial and deodorizing functions.