KR102404079B1 - hygienic pad fabric with mulberry fibers and its Method - Google Patents

Abstract

The present invention relates to a napkin fiber sanitary napkin, and more particularly, a natural mulberry sanitary napkin with excellent antibacterial effect such as no irritation to the skin and suppression of the propagation of various bacteria by forming an absorbent layer and a top sheet using only mulberry fiber and natural pulp; It relates to a manufacturing method thereof.
The method for manufacturing a mulberry sanitary napkin of the present invention comprises: a topsheet layer made of mulberry nonwoven fabric and in contact with the skin; an absorbent layer made of natural pulp to absorb and store moisture; And a waterproof layer that prevents the stored moisture from leaking to the outside; includes
The method for manufacturing a napkin fiber sanitary napkin according to the present invention has a very excellent antibacterial effect such as no irritation to the skin and suppression of the propagation of various bacteria by forming an absorbent layer and a top sheet using only mulberry fibers and natural pulp. In addition, since no additives are used, it has a soft feel, excellent absorbency, and is excellent in eco-friendly biodegradability because no chemical substances are used as natural fibers, and there are no harmful substances, so it is not harmful to the human body.

Description

Duck fiber sanitary napkin and its manufacturing method

The present invention relates to a napkin fiber sanitary napkin, and more particularly, a natural mulberry sanitary napkin with excellent antibacterial effect such as no irritation to the skin and suppression of the propagation of various bacteria by forming an absorbent layer and a top sheet using only mulberry fiber and natural pulp; It relates to a manufacturing method thereof.

In general, all women of childbearing age from menarche to menopause use pad-type sanitary napkins that are attached to the inner side of panties during menstruation to absorb menstrual fluid such as menstrual blood according to repeated menstrual cycles.

These sanitary napkins use chemicals for quick absorption or odor control. For example, the menstrual absorbent cover is polyvinyl-based, and as disclosed in the patent documents of the following prior art documents, an absorbent core containing polyacrylate, which is a chemical product in the form of granules, is provided in the cotton in the sanitary napkin. Such polyacrylates are inexpensive and easy to manufacture, and are widely used chemicals, and about 90,000 tons are consumed annually for disposable diapers and disposable sanitary napkins.

However, since polyacrylate is not biodegradable and does not rot permanently, there is a problem in that a huge amount is disposed of in landfills, causing environmental pollution. In addition, recently, chemical dyeing has been proven to be harmful to the human body. However, some disposable sanitary napkins have been dyed, causing problems such as fever, skin irritation, and itching due to chemical dyeing.

The sanitary napkin is mainly composed of three parts: a top sheet (cover layer), an absorbent layer, and a waterproof layer. The top sheet is the part that comes in direct contact with the skin, and although some products use cotton, most are made of chemical materials such as rayon, artificial fiber, and polyethylene film, and there is a lot of controversy over whether formaldehyde is detected during the manufacturing process. Most manufacturers have tested for formaldehyde and have obtained approval from the Food and Drug Administration, so you can use it with confidence, but the sanitary napkin itself is an irritant to the skin and can cause skin diseases.

In order to solve the above problems, cotton sanitary napkins and cotton diapers, which are natural materials that can be recycled while preventing skin diseases and unpleasant odors, were used. However, there is a problem in that the cotton sanitary napkin according to the prior art is exhausted or marks are generated outside the clothes when worn.

In addition, the cotton sanitary napkin according to the prior art has a problem in that the menstrual fluid leaks because there is a limit in completely absorbing the menstrual fluid. Of course, by using an integrated sanitary napkin in which several layers of cotton sanitary napkins are sewn together at once, the problem of menstrual fluid leakage can be addressed. If this is prolonged, there is a problem in that bacteria can propagate in a semi-dry state.

KR B1 No. 10-1561645 (2015.10.13)

The present invention was devised to solve the same problems as in the prior art, and by manufacturing only using natural pulp and mulberry fibers without the synthesis of other fibers, it has excellent antibacterial effect without harmful ingredients, excellent breathability and deodorization, and no skin irritation. And it is an object of the present invention to provide a manufacturing method.

To achieve the above object, a mulberry sanitary napkin according to the present invention,

a top sheet layer made of nonwoven fabric and contacting the skin;

an absorbent layer made of natural pulp to absorb and store moisture; and

A waterproof layer that prevents the stored moisture from leaking to the outside; It is characterized in that it includes.

In addition, the top sheet layer is composed of a first top sheet layer in contact with the skin and a second top sheet layer provided under the first top sheet layer, the first top sheet layer is 30 ~ 40 g / ㎡, the second top sheet layer is 60 ~ 80 g/m 2 , the absorbent layer is characterized in that it has a weight of 220 to 240 g/m 2 .

In addition, a one-way induction film in the form of a strip is provided on the upper portion of the absorbent layer to prevent moisture from diffusing to the edge, the one-way guide film is attached to the bottom, the end positioned at the edge of the product is attached to the bottom, and the other end is attached to the bottom It is characterized in that it consists of a plurality of wing parts spaced apart from each other.

In addition, the method for manufacturing a mulberry sanitary napkin according to the present invention comprises:

Boiling the inner bark of the mulberry tree to remove unnecessary components and leaving only cellulose to produce mulberry pulp;

Step of immersing mulberry pulp in sodium hydroxide solution to convert it to alkali cellulose, pulverize it to lower the degree of polymerization, and then add carbon disulfide to produce cellulose xanthonate and dissolve it in a dilute alkali solution to produce mulberry viscose ;

Aging and filtration step of leaving under a constant temperature for a certain period of time and filtering by removing air bubbles;

spinning mulberry viscose in an acidic water bath to produce mulberry fibers by oiling and cutting to give flexibility when a yarn is produced;

An opening step of unraveling the bundled mulberry fibers into a cotton shape;

A carding step of brushing the opened mulberry fiber into a flat sheet;

A water punching step of spraying high-pressure water from the top and bottom of the sheet through an aquajet device so that they are bound to each other and a bidirectional web is formed;

dehydrating and drying to produce a mulberry nonwoven fabric; and

Laminating a nonwoven fabric, natural pulp, and tarpaulin; It is characterized in that it includes.

The method for manufacturing a mulberry sanitary napkin according to the present invention has a very excellent antibacterial effect such as no irritation to the skin and suppression of the propagation of various bacteria by forming an absorbent layer and a top sheet using only mulberry fibers and natural pulp.

In addition, since no additives are used, it has a soft feel, excellent absorbency, and is excellent in eco-friendly biodegradability because no chemical substances are used as natural fibers, and there are no harmful substances, so it is not harmful to the human body.

1 is an exemplary view showing the structure of a mulberry sanitary napkin according to the present invention.
2 is a photograph showing a mulberry fiber according to the present invention.
Figure 3 is a photograph showing a mulberry nonwoven fabric according to the present invention.
4 is a process diagram showing a manufacturing process of a mulberry sanitary napkin according to the present invention.
Figures 5a, 5b is a far-infrared test graph of the nonwoven fabric of the mulberry fiber according to the present invention.
6 is a cross-sectional view showing the structure of a sanitary napkin according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, a method for manufacturing a mulberry nonwoven fabric according to the present invention will be described in detail.

1 is a cross-sectional view showing the structure of a mulberry sanitary napkin according to the present invention, FIG. 2 is a photograph showing a mulberry fiber according to the present invention, FIG. 3 is a photograph showing a mulberry nonwoven fabric according to the present invention, and FIG. It is a process chart showing the manufacturing process of the mulberry sanitary napkin according to the present invention, and FIGS.

As shown in these drawings, the napkin 100 according to the present invention is largely composed of a top sheet layer 10 , an absorbent layer 20 , and a waterproof layer 30 .

The top sheet layer 10 is located on the uppermost part and is in contact with the skin, and is made of a nonwoven fabric of mulberry fibers. Doc fiber is soft to the touch, has excellent absorbency, has excellent antibacterial action, and has excellent eco-friendly biodegradability. In this way, by using mulberry nonwoven fabric, there is no irritation to the skin, suppresses the propagation of various bacteria, and there are no harmful substances, so it is not harmful to the human body.

And this top sheet layer 10 may be configured in a double. That is, it is composed of a first top sheet layer 11 in contact with the skin and a second top sheet layer 12 provided under the first top sheet layer 12 . Here, the first topsheet layer 11 has a weight of 30-40 g/m2, the second topsheet layer 12 has a weight of 60-80 g/m2, and the absorption layer 20 has a weight of 220-240 g/m2.

When the first top sheet layer 11 is 30 g/m 2 or less, it may stick to the skin when moisture is applied, and when it is 40 g/m 2 or more, the tactile feel with the skin may be reduced.

When the second topsheet layer 12 is 60 g/m 2 or less, cushion degradation and moisture diffusion are poor, and when it is 80 g/m 2 or more, the manufacturing cost increases as expensive mulberry nonwoven fabric is excessively input.

If the absorbent layer 20 is 220 g/m 2 or less, it may not be able to store enough moisture and may leak out, and if it is 240 g/m 2 or more, it may feel uncomfortable and feel foreign.

In this way, when the top sheet layer 10 is dually composed of the first top sheet layer 11 and the second top sheet layer 12, moisture absorption is easy and the manufacturing cost can be lowered while maintaining a good tactile feel when in contact with the skin.

On the other hand, the method for manufacturing a napkin fiber sanitary napkin and diaper according to the present invention is as follows.

Boiling the inner bark of the mulberry tree to remove unnecessary components and leaving only cellulose to produce mulberry pulp (ST100); Step of immersing mulberry pulp in sodium hydroxide solution to convert it to alkali cellulose, pulverize it to lower the degree of polymerization, and then add carbon disulfide to produce cellulose xanthonate and dissolve it in a dilute alkali solution to produce mulberry viscose (ST200); Aging and filtration step (ST300) of leaving under a constant temperature for a certain period of time and filtering by removing air bubbles; When the yarn is produced by spinning mulberry viscose in an acidic water bath, oiling and cutting to give flexibility to produce mulberry fibers (ST400); An opening step (ST500) of unpacking mulberry fibers to form a cotton shape; Carding step (ST600) of brushing the opened mulberry fiber into a flat sheet; A water punching step (ST700) of spraying high-pressure water to the sheet through an aquajet device and binding them together to form a mulberry nonwoven fabric; Dehydrating and drying the mulberry nonwoven fabric (ST800); Laminating the mulberry non-woven fabric, natural pulp, and tarpaulin (ST900); includes

In the mulberry pulp generation step (ST100), a perennial mulberry is selected, cut to an appropriate length, steamed, and then peeled. When the soft outer skin is removed by soaking it in water, only the white inner skin is left. By boiling it, components such as lignin and fetoic acid are removed, leaving only cellulose to produce mulberry pulp.

The mulberry viscose production step (ST200) is converted into alkali cellulose by immersing mulberry pulp dissolved in a sodium hydroxide solution having a concentration of 18% or more, and crushing the alkali cellulose by pressing 2.5 to 3 times the weight of the cellulose. The polymerization degree is lowered through an aging process in which the polymerization degree of alkali cellulose is lowered by the action of temperature and air until it becomes suitable for spinning. After aging, alkali cellulose is put into a sulfiding machine and carbon disulfide in an amount of 33 to 38% based on the weight of mulberry pulp is added to produce cellulose xanthogen. Solid cellulose xanthogen is dissolved in a dilute alkaline solution to produce mulberry viscose.

In the aging and filtering step (ST300), the freshly produced mulberry viscose has a relatively high viscosity and salinity, making it difficult to form, so it undergoes an aging process in which it is left at a constant temperature for a certain period of time. Sodium cellulose xanthogenate in mulberry viscose is gradually hydrolyzed and saponified, so that the degree of esterification is lowered, and thus the viscosity and stability of the electrolyte are also changed. The combined sodium hydroxide and ammonium chloride values decrease, the viscosity reaches a minimum value, and then undergoes a rapidly aging process. After aging to remove air bubbles and impurities, defoaming and filtration are performed.

In the mulberry fiber generation step (ST400), when mulberry viscose is spun in an acidic water bath, sodium cellulose xanthogenate is acid decomposed to become cellulose, thereby producing mulberry viscose fibers as shown in FIG. 2 . At this time, the spinning process is carried out and the chemical composition is analyzed along with the water in the washing process, and the chemical composition is not left behind. And to give flexibility to the mulberry viscose fiber, it is oil-treated and dried, and the fine yarn is cut to the length to make the fiber.

The mulberry fire opening step (ST500) is made in the form of cotton by putting scoured and bleached mulberry fibers into an opening device and loosening the mulberry fibers which are bundled together.

In the mulberry fiber carding step (ST600), the opened mulberry fiber is put into a carding machine and brushed while passing through a plurality of interlocking rolls on which brushes are formed, so that the fibers are accumulated and moved to make a flat sheet. Here, it is divided into a first topsheet layer and a second topsheet layer according to the degree of accumulation, and the first topsheet layer is 30-40 g/m2, and the second topsheet layer is 60-80 g/m2.

In the water punching step (ST700), mulberry fibers in a sheet form are supplied to the aquajet device, and the sheets supplied to the aquajet device are bound by high-pressure water sprayed by a spray nozzle. At this time, the injection nozzle is provided on the upper and lower portions of the sheet so that the bidirectional web is formed by spraying. Of course, it should be noted that, depending on the product, high-pressure water is sprayed only from the top or bottom to form a unidirectional web.

In the dehydration and drying step (ST800), finally, when the integrated nonwoven fabric is dehydrated to remove moisture, and the remaining moisture is completely removed by supplying it to a dryer, the nonwoven fabric is completed as shown in FIG. 3 .

In the step of laminating the mulberry nonwoven fabric, natural pulp, and tarpaulin (ST900), the natural pulp is placed on the tarpaulin, and the mulberry nonwoven fabric is placed on the natural pulp and laminated.

The sanitary napkin manufactured by this method is eco-friendly because its raw material is a natural material and does not use any chemical substances, it does not use additives, so it is soft to the touch, has excellent absorbency, and has excellent antibacterial action and harmful substances. It has the advantage that it is not harmful to the human body because it does not have any.

6 is a cross-sectional view illustrating the structure of a sanitary napkin according to another embodiment of the present invention, and as shown in the drawing, absorbed moisture can be prevented from leaking to the outside.

That is, a one-way guide film 40 is provided on the absorption layer 20 to prevent moisture from diffusing to the edge. The one-way guide film 40 is provided in the form of a strip along the edge of the sanitary napkin 100 . And it consists of a bottom part 41 and a plurality of wing parts 42 having one end attached to the bottom part 41, and the bottom part 41 is located at the end of the absorbent layer 20 located on the edge side of the sanitary napkin (1). is attached and the other end is spaced apart from the bottom part 41 . Therefore, when the moisture absorbed by the absorbent layer 20 by the user's movement tries to move to the edge, the bottom part 41 and the wing part 42 are caught in the closely contacted portion to prevent the flow, and conversely, the moisture toward the center of the absorbent layer Mobility is free, so water always gathers in the center.

(Test 1)

Table 1 shows the far-infrared test of the mulberry nonwoven fabric prepared by the above method.

emissivity
(5~20㎛) radiant energy
(W/m2·㎛, 37℃) 0.876 3.38×10²

The test is a method according to KFIA-FI-1005 and is a measurement result compared to BLACK BODY using an FT-IR Spectrometer at 37°C, and the measurement graph is as shown in FIGS. 5A and 5B. As shown in the above test, it can be seen that the far-infrared emissivity is very good.

(Test 2)

Table 2 shows the antibacterial test of the mulberry nonwoven fabric prepared by the above method.

division Test result
(A) Staphylococcus aureus
Staphylococcus aureus
(ATTCC 6538) pneumococcus
Klebsiella pneumoniae
(ATCC 4352) Ma (number of viable cells immediately after inoculation of control)

1.1×

1.2×

Mb (number of viable cells after incubation for 18 hours of control) 4.5×

4.3×

Mc (number of viable cells after 18 hours of incubation of the sample) < 20 < 20 bacteriostatic reduction value (S) 5.4 6.3 Bacterial reduction rate (%) 99.9 99.9

Nonionic surfactant used: TWEEN 80 (0.05%)

Proliferation value: Proliferation value of control (effective when Mb/Ma=31.6 or higher)

Staphylococcus aureus: 40.9

Klebsiella pneumoniae: 358.3

Bacteriostatic reduction value (S): log Mb-log Mc (difference in the number of viable cells in the processed sample versus the unprocessed sample)

Bacterial reduction rate (%): (Mb-Mc)×100/Mb

As shown in the antimicrobial test result, since the bacteriostatic reduction rate is 99.0%, it can be seen that the antibacterial effect is very excellent.

(Test 3)

Table 3 shows the hazard test of the nonwoven fabric prepared by the above method.

Test Items result Elution of harmful elements (lead), elution of harmful elements (selenium), elution of harmful elements (mercury),
Fluorescent brightener, formaldehyde, content of harmful elements (total lead),
Harmful element content (total cadmium), azo dyes, chlorinated phenols (polluted carbonic acid),
Chlorinated phenols (coal tetrachloride), elution of harmful elements (antimony), elution of harmful elements (arsenic),
Elution of harmful elements (barium), elution of harmful elements (cadmium), elution of harmful elements (chromium)

not detected

Water used: distilled water

Extraction and measurement temperature: 25℃

Test method: standards and specifications of hygiene products (Ministry of Food and Drug Safety Notice No. 2018-80)

It can be seen that all were not detected as in the above hazard test results.

(Test 4)

Table 4 shows the cytotoxicity test of the nonwoven fabric prepared by the above method.

Test Items result Test Methods Cytotoxicity test Grade 0 (Noncytotoxic) ISO 10993-5: 2009

Sample solution preparation conditions: 4g/20mL + absorption, 37℃, 24h

Exam period: 2019.03.18 ~ 2019.03.21

It can be seen that 0 as in the cytotoxicity test result.

(Test 5)

Table 5 shows the skin sensitization test of the mulberry nonwoven fabric prepared by the above method.

The skin sensitization of the mulberry nonwoven fabric was evaluated by the Guinea-pig Maximization Test (GPMT) method, and the skin reaction was investigated.

Group skin reaction score Sensitization (%) G1 (sterile physiological saline-eluted group)
Polar solvent test group 0 0 G2 (Cotton Seed Oil Elution Group)
Non-polar solvent test group 0 0 G3 (sterile physiological saline negative control)
Polar solvent control 0 0 G4 (cottonseed oil negative control)
Non-polar solvent control 0 0 G5 (DNCB positive control)
positive control 1.8 100

As in the skin sensitization test results, the sensitization index (average skin reaction score) and frequency index (reduction rate) of the sterile physiological saline (polar solvent) extract test group (G1) were calculated as 0% and 0%, respectively, The sensitization index (average skin reaction score) and frequency index (sensitization rate) of the cottonseed oil (non-polar solvent) extract test group (G2) were calculated as 0, 0% and 0, 0%, respectively, in the case of the positive control group (G5). The sensitization index (mean skin reaction score) and frequency index (sensitization rate) were calculated as 1.8, 100%, 0.8, and 80%, respectively. From the above results, it can be seen that when the skin sensitization of the mulberry nonwoven fabric for guinea pigs was evaluated by the Guinea-Pig Maximization Test (GPMT) method, no skin reaction was observed, so that the sensitization was evaluated as a "very weak" material.

In all control and test groups, no moribund (death) and general symptoms were observed due to the administration of the test substance.

(Experiment 6)

In order to evaluate the skin irritation of the mulberry non-woven fabric for Rabbit, after applying 2.5 × 2.5 cm2 of the test substance to the back for 24 hours, the mortality rate, general symptoms, weight change, and skin irritation for 72 hours were observed and evaluated.

During the experimental period, no animals with death or abnormal symptoms related to the administration of the test substance were observed, and there was no change in body weight.

According to Draize's evaluation method, the primary skin irritation index (P.I.I) was calculated as "0", so it was confirmed as a "Non-irritant" substance.

10: top sheet layer 11: first top sheet layer
12: second top sheet layer 20: absorption layer
30: waterproof layer 40: one-way induction film
41: bottom part 42: wing part
ST100: mulberry pulp production step ST200: mulberry viscose production step
ST300: Aging and filtration stage ST400: Paper mulberry fiber generation stage
ST500 : Opening stage ST600 : Cardang stage
ST700: Water punching step ST800: Paper mulberry non-woven fabric production step
ST900: Lamination step

Claims (4)

Boiling the inner bark of the mulberry tree to remove unnecessary components and leaving only cellulose to produce mulberry pulp (ST100); The mulberry pulp is immersed in a sodium hydroxide solution with a concentration of 18% or higher to convert it to alkaline cellulose, compressed to 2.5 to 3 times the weight of cellulose, and subjected to an aging process to lower the degree of polymerization by pulverization. adding carbon to produce cellulose xanthonate and dissolving it in a dilute alkaline solution to produce mulberry viscose (ST200); Aging and filtration step (ST300) of leaving under a constant temperature for a certain period of time and filtering by removing air bubbles and impurities; When the yarn is produced by spinning mulberry viscose in an acidic water bath, oiling and cutting to give flexibility to produce mulberry fibers (ST400); An opening step (ST500) of unpacking mulberry fibers to form a cotton shape; Carding step (ST600) of brushing the opened mulberry fiber to make a flat sheet; A water punching step (ST700) of spraying high-pressure water from the upper and lower portions of the sheet through an aquajet device so that they are bound to each other and a bidirectional web is formed; dehydrating and drying to produce a nonwoven fabric of mulberry fibers (ST800); and placing an absorbent layer 20 made of natural pulp on the waterproof layer 30 made of a tarpaulin, and laminating a top sheet layer 10 made of a mulberry nonwoven fabric on the absorbent layer 20 (ST900); including,
The top sheet layer 10 is composed of a first top sheet layer 11 in contact with the skin and a second top sheet layer 12 provided under the first top sheet layer 11, but the first top sheet layer 11 is 30 to 40 g/m 2 , the second top sheet layer 12 has a weight of 60 to 80 g/m 2 , and the absorbent layer 20 has a weight of 220 to 240 g/m 2 ,
A one-way guide film 40 is provided on the upper portion of the absorbent layer 20 to prevent moisture from diffusing to the edge, and the one-way guide film 40 is provided in a band shape along the edge of the sanitary napkin 100, and the bottom part It consists of a 41 and a plurality of wing parts 42, one end of which is attached to the bottom 41, and the bottom 41 is attached to the end of the absorbent layer 20 located on the edge side of the sanitary napkin 1, The other end is spaced apart from the bottom part 41, and when the moisture absorbed in the absorbent layer 20 by the user's movement tries to move to the edge, the bottom part 41 and the wing part 42 are caught in the closely contacted part to prevent the flow. A method of manufacturing a napkin fiber sanitary napkin, characterized in that it interferes with the movement of moisture toward the center of the absorbent layer, thereby allowing moisture to gather in the center. delete delete delete

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