KR102440557B1 - Manufacturing method of non-woven fabric using hemp fiber and tencel fiber - Google Patents

Abstract

The method of manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an aspect of the present invention comprises the steps of preparing a hemp fiber raw material, immersing 4 to 8 parts by weight of the hemp fiber raw material in 100 parts by weight of water to prepare an immersion solution, and Heating at 80 to 120° C. for 60 to 120 minutes, preparing a microbial culture solution and obtaining hemp fibers using a microbial culture solution and immersion solution, washing and drying hemp fibers, preparing tencel fibers and mixing with tencel fibers Mixing the dried hemp fibers to prepare a mixed fiber, and manufacturing a nonwoven fabric with the mixed fiber.

Description

Manufacturing method of non-woven fabric using hemp fibers and tencel fibers

The present invention relates to a method for manufacturing a nonwoven fabric using hemp fibers and Tencel fibers, which can be obtained by refining hemp fibers from hemp using microorganisms, and manufacturing a nonwoven fabric using the refined hemp fibers.

Hemp fiber is a fiber obtained from the stem of hemp, an annual plant belonging to the Morus family, and has excellent antibacterial properties, deodorization properties, and breathability, and has been used for various uses including clothing since ancient times.

In the manufacturing process of hemp fiber, as in the manufacturing process of general fibers, a refining process of removing impurities to improve physical properties, processability and dyeability is essential.

It is known that the refining process of hemp fiber mainly uses alkaline refining agents such as sodium hydroxide, sodium bicarbonate and sodium carbonate.

However, the above-described alkaline refining agent has a problem of reducing the antibacterial, deodorizing and ventilation properties of hemp fibers from hemp fibers, and when the refining agent remains in hemp fibers even in a trace amount, hemp fibers have excellent antibacterial, deodorizing and ventilation properties. Even though it is a fiber, it is difficult to apply it to hygiene products such as masks and diapers that are worn on areas sensitive to external stimuli.

In addition, hemp fibers have a problem in that it is difficult to apply to the hygiene products described above due to a characteristic rough texture, even if it is not a problem that only a refining agent remains.

On the other hand, tencel fiber is a kind of natural rayon fiber, has good durability, excellent hygroscopicity, and has a very soft texture, and is used in many fields such as bed matrix cover, various clothes, and underwear.

Registered in Republic of Korea Patent Publication No. 10-1123063, 2012.02.27. Registered Republic of Korea Patent Publication No. 10-2083199, 2020.02.25. Registered in Republic of Korea Patent Publication No. 10-1761583, 2017.07.20.

An object of the present invention is to solve the above problems, and to use hemp fibers having excellent antibacterial properties, deodorization properties and breathability in hygiene products such as masks and diapers, using microorganisms rather than conventional alkaline refining agents. It is an object of the present invention to provide a method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers capable of manufacturing a nonwoven fabric using refined hemp fibers and tencel fibers.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the description below.

In order to achieve the above object, the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to one aspect of the present invention includes the steps of preparing a hemp fiber raw material, 4 to 8 parts by weight of the hemp fiber raw material in 100 parts by weight of water and immersed in 100 parts by weight of water. Preparing a solution, heating the immersion solution at 80 to 120° C. for 60 to 120 minutes, preparing a microbial culture solution, obtaining hemp fibers using the microbial culture solution and immersion solution, washing and drying the hemp fibers , preparing a Tencel fiber, mixing the Tencel fiber and the dried hemp fiber to prepare a mixed fiber, and manufacturing a nonwoven fabric with the mixed fiber.

The method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention according to the above configuration can expect the following effects.

As the hemp fiber is refined using microorganisms rather than an alkaline refining agent, impurities present in the hemp fiber can be removed without reducing the excellent antibacterial, deodorizing and ventilation properties of the hemp fiber due to the alkaline refining agent.

In addition, since the alkaline refining agent is not used at all, the alkaline refining agent may not remain in the hemp fiber after refining.

By mixing hemp fibers and Tencel fibers to make a nonwoven fabric, the hemp fibers have excellent antibacterial, deodorizing and breathable properties, while reducing the rough texture of hemp fibers by mixing them with Tencel fibers.

Accordingly, the nonwoven fabric manufactured by the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention can be used for hygiene products such as diapers and masks used in sensitive areas.

1 is a flowchart showing the sequence of a method of manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention.
2 is a flowchart showing the sequence of the refining step in the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention.
Figure 3 is a flow chart showing the sequence of the nonwoven fabric manufacturing step in the manufacturing method of the nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and those of ordinary skill in the art to which the present invention pertains. It is provided to fully inform the person of the scope of the invention. On the other hand, the terms used in the present specification are for describing the embodiments, and are not intended to limit the present invention. In this specification, the singular also includes the plural, unless specifically stated otherwise in the phrase.

Hereinafter, a method of manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to embodiments of the present invention will be described with reference to the drawings.

The method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention includes a preparation step (S100), a heating step (S200), a refining step (S300), a washing step (S400), a mixing step (S500) and It may include a nonwoven fabric manufacturing step (S600).

First, a hemp fiber raw material is prepared (S100).

The preparation step (S100) may be a step of preparing the hemp stem, separating the cob and the hemp hull from the prepared hemp stem, and preparing the hemp hull as a hemp fiber raw material.

The hemp fiber raw material prepared in the preparation step (S100) is immersed in water to prepare an immersion solution, and the prepared immersion solution is heated (S200).

The heating step (S200) may be a step of sterilizing microbes that may be present in the hemp husk, which is a raw material for hemp fibers prepared in the preparation step (S100).

The heating step (S200) may be a step of immersing 4 to 8 parts by weight of the hemp fiber raw material prepared in the preparation step (S100) in 100 parts by weight of water to prepare an immersion solution, and heating the prepared immersion solution.

At this time, the heating of the prepared immersion liquid may be performed at 80 to 120 ℃ for 60 to 120 minutes.

In the heating step (S200), if the heating temperature of the immersion liquid is less than 80 ℃, the temperature is low, so the sterilization of the hemp hull may not be effective, and if it exceeds 120 ℃, the temperature is high and the hemp hull is damaged due to heat. The physical properties of the nonwoven fabric manufactured by the manufacturing method of the nonwoven fabric using the hemp fiber and the tencel fiber according to the embodiment may be deteriorated.

In the heating step (S200), if the heating time of the immersion liquid is less than 60 minutes, the heating time is short, so the sterilization of the hemp husks may not be completely accomplished. there may not be

Prepare a microbial culture solution, and obtain a hemp fiber using the prepared microbial culture solution and the immersion solution obtained in the heating step (S200) (S300).

The refining step (S300) may include a cooling step (S310), an input step (S320), a nutrient supply step (S330), a maintenance step (S340), and a recovery step (S350).

The cooling step (S310) may be a step of cooling the immersion liquid obtained in the heating step (S200) to 36 to 38 °C.

The input step (S320) may be a step of preparing a microbial culture solution, and adding the microorganisms to the immersion solution cooled to 36 to 38°C in the cooling step (S310) to prepare a mixed solution.

The microorganism culture solution prepared in the input step (S320) may be a Sphingobacterium multivorum K-9 strain (Accession No.: KCCM 11711P) cultured in a medium.

Here, the microorganism culture medium may be a Sphingobacterium multiverum K-9 strain cultured in a liquid or solid medium, preferably cultured in a liquid medium.

The microorganism culture medium in which the Sphingobacterium multiverum K-9 strain is cultured can be prepared using a method and medium according to a conventional expansion culture using the Sphingobacterium multiverum K-9 strain.

For example, when the Sphingobacterium multiverum K-9 strain prepares a microbial culture medium cultured in a liquid medium, the microbial culture medium is 5 to 20 parts by weight of the hemp fiber raw material prepared in the preparation step (S100) purified water 100 to 200 It may be prepared by culturing the Sphingobacterium multiverum K-9 strain in a liquid medium containing a hemp extract prepared by heating at 60-120° C. for 1 to 5 hours by adding it to parts by weight.

On the other hand, the hemp husk prepared in the preparation step (S100) is cellulose component 70-74%, hemicellulose component 17.9-22.6%, lignin component 3.7-5.7%, pectin component 0.9%, lipid It is known that the component consists of 0.8% of the wax layer.

In order to use hemp hulls as hemp fibers, a refining process that removes impurities including hemicellulose, lignin, pectin and lipid components other than cellulose is important.

The Sphingobacterium multiverum K-9 strain cultured in the microbial culture medium prepared in the input step (S320) does not produce cellulase that decomposes cellulose, but hemicellulose, pectin, impurities contained in the hemp husk, It has excellent decomposition power of lignin and lipid component wax.

Therefore, in the refining step (S300), when the hemp hull is refined using the Sphingobacterium multiverum K-9 strain, only the impurities including the hemicellulose, lignin, pectin, and lipid component wax of the hemp hull are removed to damage the cellulose. It is possible to obtain refined hemp fiber with minimized

The input step (S320) may be to add 150 to 250 parts by weight of the microorganism culture solution in which the Sphingobacterium multiverum K-9 strain is cultured to 100 parts by weight of the immersion solution cooled in the cooling step (S310), preferably, input Step (S320) may be to prepare a mixed solution by adding 200 parts by weight of the microorganism culture solution in which the Sphingobacterium multiverum K-9 strain is cultured to 100 parts by weight of the immersion solution cooled in the cooling step (S310).

The nutrient supply step (S330) may be to inject nutrients into the mixed solution obtained in the input step (S320) so that the microorganisms introduced into the mixed solution in the input step (S320) can smoothly grow and culture in the mixed solution.

In the nutrient supply step (S330), the nutrients input to the mixed solution obtained in the input step (S320) may be composed of at least one selected from glucose and hemp seed powder.

Preferably, the nutrients input to the mixed solution obtained in the input step (S320) in the nutrient supply step (S330) may be composed of glucose and hemp seed powder.

The nutrient supply step (S330) may be to add 0.13 to 0.17 parts by weight of glucose and 0.15 to 0.35 parts by weight of hemp seed powder as nutrients to 100 parts by weight of the mixed solution.

If the amount of glucose and hemp seed powder added to 100 parts by weight of the mixture solution in the nutrient supply step (S330) is less than 0.13 parts by weight and 0.15 parts by weight, respectively, the growth of microorganisms in the mixture may not be performed smoothly, and glucose and hemp seed powder When it exceeds 0.17 parts by weight and 0.35 parts by weight, respectively, nutrients for the growth of microorganisms in the mixed solution are sufficient, and the nutrient supply efficiency may be reduced.

On the other hand, in the nutrient supply step (S330), the hemp seed powder may be prepared by pressing the hemp seed to extract oil from the hemp seed, and then roasting the powder prepared by grinding the remaining hemp seed.

When the hemp seed powder is added as a nutrient to the mixed solution obtained in the input step (S320) in the nutrient supply step (S330), the hemp seed powder is dispersed throughout the mixed solution, and the microorganisms introduced in the input step (S320) are more smoothly cultured in the mixed solution. can be, and accordingly, the refining of the hemp fiber raw material can be made more smoothly in the maintenance step (S340).

The maintaining step (S340) may be to maintain the temperature of the mixture obtained in the nutrient supply step (S330) at 36 to 38° C. for 36 to 72 hours.

The maintenance step (S340) may be a step of manufacturing hemp fiber by allowing the hemp fiber raw material to be refined by microorganisms in the mixed solution obtained in the nutrient supply step (S330).

As the temperature of the mixed solution obtained in the nutrient supply step (S330) is maintained at 36 to 38° C. for 36 to 72 hours in the maintenance step (S340), the hemp fiber raw material is refined by the enzyme secreted from the microorganism as the microorganisms grow in the mixed solution can be

In the maintenance step (S340), if the temperature of the mixed solution is less than 36 ℃ or exceeds 38 ℃, the culturing of microorganisms in the mixed solution may not be made smoothly, so that the refining of the hemp fiber raw material may not be made effectively.

If the temperature holding time in the holding step (S340) is less than 36 hours, the time for refining the hemp fiber raw material in the mixed solution is short, and the refining of the hemp fiber raw material may not be completely accomplished.

If the temperature holding time exceeds 72 hours in the holding step (S340), the refining of the hemp fiber raw material in the mixed solution is sufficiently performed, and further maintaining the temperature may not be meaningful.

The maintenance step (S340) is performed by stirring the mixed solution every 2 to 4 hours for 3 to 10 minutes so that the refining of the hemp fiber raw material in the mixed solution whose PH is adjusted in the nutrient supply step (S330) is effectively carried out while stirring the mixed solution at 36 to 38 ° C. It may be maintained for 36 to 72 hours.

When the temperature of the mixed solution is maintained in the holding step (S340), the temperature of the mixed solution is maintained at 36 to 38 ° C. for 36 to 72 hours while stirring the mixed solution every 2 to 4 hours for 3 to 10 minutes, thereby introducing microorganisms to the hemp fiber raw material in the mixed solution. Since it can penetrate evenly, the refining of the hemp fiber raw material can be made uniformly as a whole.

The recovery step (S350) may be a step of obtaining hemp fibers by retrieving the hemp fibers from the mixed solution obtained in the maintenance step (S340).

On the other hand, the mixed solution remaining after removing the hemp fibers in the recovery step (S350) is not discarded, but filtered and then stored, and the refining step (S300) when manufacturing the nonwoven fabric by the method of manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention ) can be used as a microbial culture medium.

The hemp fibers obtained in the refining step (S300) are washed and dried (S400).

The washing step (S400) may be a step of washing the hemp fibers obtained in the refining step (S300) with high pressure water and drying the hemp fibers at 50 to 80° C. for 15 to 30 minutes.

In the washing step (S400), if the drying temperature is less than 50 ℃, the drying temperature is low, so that the drying of the hemp fibers may not be effectively made, and if it exceeds 80 ℃, the hemp fibers may be damaged due to the high temperature.

If the drying time in the washing step (S400) is less than 15 minutes, the drying time is short, so the hemp fibers may not be completely dried. .

Preferably, the washing step (S400) may be a step of washing the hemp fibers obtained in the refining step (S300) with high pressure water and drying at 60 to 70°C for 15 to 25 minutes, more preferably at 65°C for 20 minutes It may be a drying step.

A mixed fiber is prepared by mixing the tencel fiber and the hemp fiber dried in the washing step (S400) (S500).

The mixing step (S500) may be to prepare mixed fibers by mixing the tencel fibers and the hemp fibers dried in the washing step (S400), and mixing 25 to 100 parts by weight of the hemp fibers with 100 parts by weight of the tencel fibers.

By mixing tencel fibers and hemp fibers in the mixing step (S500) to produce mixed fibers, the nonwoven fabric manufactured by the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention has excellent antibacterial properties of hemp fibers, It can have excellent hygroscopicity and tactile properties of tencel fibers while having deodorizing and ventilation properties.

When the mixed amount of hemp fibers is less than 25 parts by weight in the mixing step (S500), the content of hemp fibers is small. Antibacterial, deodorizing and breathability may be poor.

When the mixed amount of hemp fibers exceeds 100 parts by weight in the mixing step (S500), the nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention as the content of hemp fibers is small and the content of hemp fibers is excessive. The hygroscopicity and feel of the nonwoven fabric manufactured by the manufacturing method may be deteriorated.

A nonwoven fabric is prepared from the mixed fibers obtained in the mixing step (S500) (S600).

In the nonwoven fabric manufacturing step (S600), a method of manufacturing a nonwoven fabric with the mixed fibers obtained in the mixing step (S500) may generally use a method of manufacturing a nonwoven fabric, for example, needle punching or spunlace technique may be used, Preferably, it may be a step of manufacturing a nonwoven fabric with mixed fibers using a spunlace technique.

The nonwoven fabric manufacturing step (S600) may include a carding step (S610) and a waterjet processing step (S620).

Carding the carding step (S610) may be a step of manufacturing a web on a flat sheet by carding the mixed fibers obtained in the mixing step (S500).

Here, carding may refer to a carding process using a carding machine that is typically used in the manufacturing process of fabrics and nonwovens, and preferably mixing using a carding machine that opens and combs the mixed fibers produced in the mixing step (S500). It may be to form a sheet-like web having a predetermined weight and width without directionality while removing foreign substances that may exist in the fibers.

The water jet processing step (S620) may be a step of producing a nonwoven fabric by spraying high-pressure water on the flat sheet web obtained in the carding step (S610).

The water jet processing step (S620) is a step of manufacturing a nonwoven fabric by spraying high-pressure water on the flat sheet web obtained in the carding step (S610) to bind the mixed fibers constituting the flat sheet web obtained in the carding step (S610). have.

The water jet processing step (S620) may be a step of preparing a nonwoven fabric by spraying water having a pressure of 50 to 120 bar on the flat sheet web obtained in the carding step (S610).

In the water jet processing step (S620), a water jet spraying high pressure water with a plurality of fine nozzles may be used in order to spray high pressure water on the flat sheet-like web obtained in the carding step (S610).

In the water jet processing step (S620), mixed fibers forming a flat sheet web obtained in the carding step (S610) by spraying high pressure water on the upper and lower surfaces of the flat sheet web obtained in the carding step (S610) using a plurality of water jets. It may be a step of manufacturing a nonwoven fabric by making a bond between the two.

The nonwoven fabric manufacturing step (S600) may further include a drying step (S630) of drying the nonwoven fabric manufactured in the waterjet processing step (S620).

The drying step (S630) may be a step of drying the nonwoven fabric obtained in the waterjet processing step (S620) at 130 to 170° C. for 5 to 20 seconds to remove water present in the nonwoven fabric produced in the waterjet processing step (S620). .

If the drying temperature in the drying step (S630) is less than 130 ℃, the drying temperature is low and the drying time is too long, the productivity of the nonwoven fabric using the hemp fiber and the tencel fiber manufactured according to the embodiment of the present invention may be reduced.

In the drying step (S630), if the drying temperature exceeds 170 ℃, the drying temperature is high, the nonwoven fabric using the hemp fibers and tencel fibers manufactured according to the embodiment of the present invention may be damaged due to heat.

If the drying time is less than 5 seconds in the drying step (S630), the drying time is too short, and the nonwoven fabric using the hemp fiber and the Tencel fiber manufactured according to the embodiment of the present invention may not be completely dried.

If the drying time exceeds 20 seconds in the drying step (S630), the drying time is too long, sufficient drying may be achieved, and further drying may not be meaningful.

Preferably, the drying step (S630) may be a step of drying the nonwoven fabric produced in the water jet processing step (S620) at 150° C. for 15 seconds.

The nonwoven fabric produced by the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention is produced by refining hemp fibers using microorganisms rather than alkaline refining agents. Impurities present in hemp fibers can be removed without reducing deodorization and ventilation.

In addition, the alkaline refining agent may not remain in the nonwoven fabric manufactured by not using any alkaline refining agent during refining of hemp fibers.

The nonwoven fabric manufactured by the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention is prepared by mixing hemp fibers and tencel fibers to produce a nonwoven fabric with excellent antibacterial, deodorizing and breathable properties of hemp fibers. It is possible to have an excellent sense of contact by mixing the tencel fibers while having it.

Accordingly, the nonwoven fabric manufactured by the method for manufacturing a nonwoven fabric using hemp fibers and tencel fibers according to an embodiment of the present invention can be used for hygiene products such as diapers and masks used in sensitive areas.

<Example 1>

Hemp stems were prepared, and the cob and hemp husks were separated from the prepared hemp stems to prepare hemp husks as hemp fiber raw materials.

An immersion solution was prepared by immersing 6 parts by weight of the hemp fiber raw material in 100 parts by weight of water, and the prepared immersion solution was heated at 100° C. for 100 minutes. After that, the heated immersion solution was cooled to 37°C.

Sphingobacterium multiverum K-9 strain was cultured at 37°C to prepare a microbial culture solution, and 200 parts by weight of the prepared microbial culture solution was added to 100 parts by weight of the cooled immersion solution to prepare a mixed solution. As nutrients, 0.15 parts by weight of glucose and 0.25 parts by weight of hemp seed powder were added to the prepared mixture.

The temperature of the nutrient-injected mixture was maintained at 37° C. for 54 hours. At this time, the temperature of the mixture was maintained while stirring the mixture for 5 minutes every 3 hours.

Hemp fibers were removed from the mixed solution to obtain hemp fibers. The obtained hemp fibers were washed with water under high pressure and dried at 65° C. for 25 minutes.

Tencel fibers were prepared, and 100 parts by weight of the prepared tencel fibers and 100 parts by weight of the dried hemp fibers were mixed to prepare a mixed fiber. At this time, the Tencel fiber and the hemp fiber were cut to 6 to 7 cm so that the Tencel fiber and the hemp fiber were mixed smoothly.

A flat sheet-like web was manufactured by carding the prepared mixed fibers, and high-pressure water was sprayed on the upper and lower surfaces of the prepared flat sheet-like web using a water jet to prepare a nonwoven fabric. Thereafter, the prepared nonwoven fabric was dried at 150° C. for 15 seconds.

<Example 2>

A nonwoven fabric was prepared in the same manner as in Example 1, but mixed fibers were prepared by mixing 100 parts by weight of tencel fibers and 25 parts by weight of hemp fibers when preparing mixed fibers.

<Test Example 1>

The nonwoven fabrics prepared according to Examples 1 and 2 were measured by requesting the FITI Research Institute to determine whether or not pigments were detected, acids and alkalis were detected, and whether formaldehyde was detected.

1. Measurement method

1) Whether or not pigment is detected

Example 1 as a standard and test method for quasi-drugs (Ministry of Food and Drug Safety Notification No. 2020-85 (2020.9.9), non-woven fabric) to confirm whether a dye is detected from the nonwoven fabric prepared according to Examples 1 and 2 to 2, it was measured whether the dye was detected in the nonwoven fabric.

The measurement method according to the standards and test methods for quasi-drugs (Ministry of Food and Drug Safety Notice No. 2020-85 (September 2020, 2020), non-woven fabric) is 100 ml of boiled and cooled water, 10 g of the non-woven fabric prepared according to Examples 1 and 2, respectively. After the addition, the mixture was stirred and filtered. After that, 50 ml of each filtrate was taken, put in a Nessler tube, and the color was observed from above.

2) Acids and alkalis

In order to check whether acids and alkalis are detected from the nonwoven fabrics manufactured according to Examples 1 and 2, it is carried out with the standards and test methods for quasi-drugs (Ministry of Food and Drug Safety Notice No. 2020-85 (2020.9.9), non-woven fabrics) Whether or not acids and alkalis were detected in the nonwoven fabrics prepared according to Examples 1 and 2 was measured.

The measurement method according to the standards and test methods for quasi-drugs (Ministry of Food and Drug Safety Notification No. 2020-85 (September 2020), non-woven fabric) is: 1) Take 10ml of the filtrate obtained from the detection of pigment into a test tube with an inner diameter of 15mm, It was confirmed whether redness was detected when 2 drops of phenolphthalein solution were added. Separately, 1) 10ml of the filtrate obtained from the detection of a dye was taken, and it was checked whether red was detected when 1 drop of methyl orange TS was added.

3) Whether formaldehyde is detected

Examples of standards and test methods for quasi-drugs (Ministry of Food and Drug Safety Notification No. 2020-85 (2020.9.9), non-woven fabric) to confirm whether formaldehyde is detected from the nonwoven fabric prepared according to Examples 1 and 2 Whether formaldehyde was detected in the nonwoven fabric prepared according to 1 to 2 was measured.

The measurement method according to the standards and test methods for quasi-drugs (Ministry of Food and Drug Safety Notice No. 2020-85 (2020.9.9), non-woven fabric) is 1.0 g of the non-woven fabric prepared according to Examples 1 and 2 to a flask with a 200 ml stopper. Put each, add 100 ml of purified water, put a stopper, and extract for 1 hour while shaking occasionally in a water bath at 40 ° C. Then, the solution was filtered while warm using a glass filter (G2) to prepare a sample solution. Take 10.0 ml of the test solution, put it in a Nessler tube, add 10 ml of acetylacetone TS, shake it, warm it in a water bath at 40°C for 30 minutes, and then cool it rapidly. 20ml of potassium chromate comparison solution was taken in a Nessler tube, and the color of the sample solution and the comparison solution was compared and observed from above using a white background in the head tube.

2. Measurement result

Table 1 below summarizes the measurement results of whether the nonwoven fabrics prepared according to Examples 1 and 2 were dyed, whether acids and alkalis were detected, and whether formaldehyde was detected.

Measurement type measurement result Example 1 Whether or not pigment is detected - Filtrate does not show color acid and alkali
detection phenolphthalein Does not show red methyl orange does not show red Whether formaldehyde is detected - The color of the sample solution is not darker than the color of the comparison solution. Example 2 Whether or not pigment is detected - Filtrate does not show color acid and alkali
detection phenolphthalein Does not show red methyl orange does not show red Whether formaldehyde is detected - The color of the sample solution is not darker than the color of the comparison solution.

Referring to Table 1, it can be seen that pigments, acids, alkalis, and formaldehyde are not detected from the nonwoven fabrics prepared according to Examples 1 and 2. This is a result confirming that the nonwoven fabric manufactured according to Examples 1 and 2 satisfies the standards for quasi-drugs announced by the Ministry of Food and Drug Safety. That is, it can be seen that the nonwoven fabric prepared according to Examples 1 and 2 can be applied to articles such as masks and diapers worn on areas sensitive to external stimuli.

In addition, it can be confirmed that alkali is not detected from the nonwoven fabric prepared according to Examples 1 and 2, which is not present in the hemp fibers because an alkaline refining agent is not added when manufacturing the nonwoven fabric according to Examples 1 and 2 It is the result.

<Test Example 2>

Test Example 2 is an antibacterial measurement experiment for determining whether the nonwoven fabric prepared according to Examples 1 and 2 has antibacterial properties against Staphylococcus aureus, E. coli, and Pseudomonas aeruginosa. The antibacterial activity measurement test according to Test Example 2 was requested to be performed by the FITI Research Institute by the method of KS K 0693:2016. The test results are shown in Table 2 below.

Bacteriostatic reduction rate (%) Example 1 Example 2 Staphylococcus aureus 99.9 99.9 coli 99.9 99.9 Pseudomonas aeruginosa 99.9 99.9

According to Table 2, the nonwoven fabric prepared according to Examples 1 and 2 showed a bacteriostatic reduction rate of 99.9% against Staphylococcus aureus ATCC 6538, Escherichia coli ATCC 25922, and Pseudomonas aeruginosa ATCC 27853). that can be checked This is a result confirming that the nonwoven fabric prepared according to Examples 1 and 2 has antibacterial properties against Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. As it is not refined with a refining agent, it can be confirmed that the antibacterial properties of the hemp fiber raw material are maintained without deterioration.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims to be described later rather than the above detailed description, and all changes or modifications derived from the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

S100: Preparation
S200: heating step,
S300: refining step, S310: cooling step, S320: input step, S330: nutrient supply step,
S340: maintenance step, S350: recovery step,
S400: washing step,
S500: mixing step,
S600: non-woven fabric manufacturing step,
S610: carding step, S620: water jet processing step, S630: drying step.

Claims (6)

Preparing a hemp stem, separating the cob and the hemp hull from the hemp stem to prepare the hemp hull as a hemp fiber raw material;
preparing an immersion solution by immersing 6 parts by weight of the hemp fiber raw material in 100 parts by weight of water, heating the immersion solution at 100° C. for 100 minutes, and then cooling the immersion solution to 37° C.;
preparing a microbial culture solution at 37° C. of culturing Sphingobacterium multiverum K-9, and adding 200 parts by weight of the microbial culture solution to 100 parts by weight of the immersion solution to prepare a mixed solution;
0.25 parts by weight of a hemp seed powder prepared by roasting compressed hemp seeds from which oil has been extracted and 0.15 parts by weight of glucose are added to the mixed solution, and the temperature of the mixed solution is maintained while stirring the mixed solution every 3 hours for 5 minutes. manufacturing hemp fibers by maintaining at 37°C for 54 hours;
removing the hemp fibers from the mixed solution, washing the hemp fibers with water and drying;
Preparing a Tencel fiber, cutting the Tencel fiber and the hemp fiber to 6 to 7 cm;
preparing a mixed fiber by mixing 25 parts by weight or 100 parts by weight of the hemp fiber and 100 parts by weight of the tencel fiber; and
Including; manufacturing a nonwoven fabric with the mixed fibers
A method of manufacturing a nonwoven fabric using phosphorus hemp fibers and tencel fibers. delete delete delete delete delete

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