KR20210013826A - Ventilating Insole manufactured by Environmental-Friendly Materials - Google Patents

Abstract

The present invention relates to an insole of a shoe, and more particularly, to a ventilating insole manufactured by environmental-friendly materials. The insole is an eco-friendly biodegradable nonwoven fabric manufactured according to: a step (S10) in which biodegradable polylactic acid (PLA) is put into an extruder and melted, spun through a spinning nozzle having hundreds of small orifices, and drawn with high-pressure hot air sprayed at high speed from both sides of the spinning nozzle and cooling, so as to be fiberized; a step (S20) of integrating the fiberized PLA in the form of a web on a mesh belt; a step (S30) of laminating the pulp on the PLA integrated in the form of a web; a step (S40) of accumulating and laminating the PLA fiberized in step S10 on the pulp in the form of a web; and a step (S50) of bonding the laminated PLA, pulp, and PLA by heat-sealing.

Description

Breathable insole made of eco-friendly materials {Ventilating Insole manufactured by Environmental-Friendly Materials}

The present invention relates to a breathable insole using an eco-friendly material.

Recently, as the functional footwear market has been greatly activated, various types of functional footwear have been developed and released to meet the diverse needs of consumers. In particular, the development of new functional shoes is very important, as walking shoes, which are shoes imitating the shape of Maasai shoes, which are gaining popularity as a recently popular shoe, are invigorating the domestic shoe industry that has been stagnant. .

Looking at the conventional functional shoes that have been developed so far, as in Korean Patent Registration No. 10-0800060, walking shoes, which are shoes that imitate the shape of Maasai shoes, and Korean Registration Office No. 20-157576, a plurality of ventilation holes are provided in the midsole and sole. Shoes with various performance functions, such as land shoes with excellent shock absorption by forming and manufacturing method of insole with soy fiber charcoal added to improve antibacterial deodorization function in Korean Patent No. 10-371944 are known. Patents have been registered.

And functional shoes as described above are given functions such as ease of sweat absorption, breathability, antibacterial properties, and impact resistance along with the functionality according to the purpose of use, but most of the conventional functional shoes developed so far are the 　 endothelium, Or, as the fabric of the 　insole is mainly made of synthetic fiber, the inside of the shoe is rough or sweat absorption, 　breathability 　, etc. are poor.

In general, non-woven fabric refers to non-woven fibers. That is, it means a 　 fiber 　 assembly that is not made by spinning, weaving, or braiding, and it means that it is made into sheets and bonded by physical and chemical means.

Conventional non-woven fabrics were manufactured by composite spraying of high-absorbent pulp and high bonding strength polyethylene (PE) or polypropylene (PP) when used as hygiene products.

However, polyethylene (PE) or polypropylene (PP) has a problem that can cause skin diseases such as erythema and itching in the soft skin because harmful ingredients are sprayed and not absorbed, and because of its non-rotation property, it causes environmental problems after disposal. There was this.

In recent years, efforts to reduce carbon dioxide due to global warming have been continuously studied. In particular, since polymers produced from fossil fuels not only increase the emission of carbon dioxide, but also have a limit in reserves, studies on polylactic acid products that can be converted into fibers by melt-spraying polymers synthesized from natural plants are being conducted.

Polylactic acid (PLA) is forming a market with a scale of 150,000 tons around the world, and not only disposable products using PLA's biodegradable properties, but also areas where general plastics such as food packaging materials, containers, and electronic product cases were used. Its application range is expanding.

However, polylactic acid (PLA) is higher in price than polyethylene (PE) or polypropylene (PP), has a rough texture, has a small volume, and has low elasticity.

The present invention has been devised to solve the problems of the prior art, and an object of the present invention is to laminate a biodegradable polylactic acid (PLA) having excellent physical properties on the outer surface of the pulp having soft properties, absorbency and bulkiness to achieve absorbency and absorption. It is to provide a 　environmentally 　biodegradable nonwoven fabric and its manufacturing apparatus and manufacturing method that improves the quality of products by improving physical properties while making use of softness and volume, reducing manufacturing costs, and making 100% biodegradation after disposal.

In addition, the present invention, by using the non-woven fabric as a shoe 　 inner skin 　 or 　 insole fabric, it has a good feeling of wearing, and has excellent breathability and sweat absorption, and excellent antibacterial properties, thereby providing a shoe 　inner and 　insole fabric having eco-friendly characteristics. Has its purpose.

As one means to solve the above-described problem, in the insole of the shoe, the insole is (S10) PLA (biodegradable polylactic acid) is put into an extruder and melted, and then hundreds of small orifices are formed. Spinning through the formed spinning nozzle and stretching and cooling with high-pressure hot air sprayed at high speed from both sides of the spinning nozzle to make fibers 　; (S20) the step of integrating the 　 fiberized PLA in the form of a web on a mesh belt; (S30) laminating pulp on the PLA integrated in the web form; (S40) a step of accumulating and laminating the PLA fiberized in the step S10 on the pulp in the form of a web; And (S50) bonding the laminated PLA, pulp, and PLA by thermal fusion. It is a breathable insole using an eco-friendly material, characterized in that it is an eco-friendly biodegradable nonwoven fabric manufactured according to.

An embodiment of the present invention is prepared by laminating a pulp layer and a PLA layer having biodegradation characteristics to make use of the soft properties, water absorption and bulkiness of the pulp layer, and the PLA layer to hold and protect the pulp layer to improve the mechanical strength required for actual use. It has the effect of improving product quality.

In addition, by using pulp, manufacturing costs can be reduced, and 100% biodegradation is made after disposal, so there is an effect that does not cause environmental problems.

In addition, it does not emit carcinogens or substances harmful to hygiene, and has an effect of improving hygiene and safety due to excellent breathability and refreshing sensation.

In addition, since the PLA layer holds the surface of the pulp layer, it can be cleaned, and this has the effect of being able to be used repeatedly several times.

In addition, the present invention according to the above problem solving means is to use the non-woven fabric manufactured by the above method as a fabric for shoes 　 inner skin 　 or 　 insoles, so that the feeling of wearing is good, breathability is excellent, and it absorbs sweat emanating from the feet well. , It has excellent antibacterial properties.

1 is a schematic diagram illustrating an apparatus for manufacturing a 　 eco-friendly 　 biodegradable nonwoven fabric according to an embodiment of the present invention; Figure 2 is a block diagram for explaining the overall configuration of the manufacturing apparatus for 　 eco-friendly 　 biodegradable nonwoven fabric according to an embodiment of the present invention; Figure 3 is a block diagram for explaining the configuration of the first and second PLA 　 fiber manufacturing machine in the 　 eco-friendly 　 biodegradable nonwoven fabric manufacturing apparatus according to an embodiment of the present invention; Figure 4 is a flow chart for explaining the manufacturing method of the 　 eco-friendly 　 biodegradable nonwoven fabric according to an embodiment of the present invention; And Figure 5 is a cross-sectional view showing a 　 eco-friendly 　 biodegradable nonwoven fabric according to an embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component. For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term "and/or" includes a combination of a plurality of related stated items or any of a plurality of related stated items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. Should be. On the other hand, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there is no other component in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

Hereinafter, a preferred embodiment of the present invention will be described in more detail.

1 is a schematic diagram for explaining an apparatus for manufacturing 　environmentally 　 biodegradable nonwoven fabric according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining the overall configuration of an apparatus for manufacturing 　environmental 　 biodegradable nonwoven fabric according to an embodiment of the present invention And Figure 3 is a block diagram for explaining the configuration of the first and second PLA 　 fiber maker in the 　 eco-friendly 　 biodegradable nonwoven fabric manufacturing apparatus according to an embodiment of the present invention.

As shown in Figs. 1 and 2, the apparatus for manufacturing the 　 eco-friendly 　 biodegradable nonwoven fabric includes the first and second PLA fiber makers 100 and 300, the pulp supply unit 200, the mesh belt 400, the control unit 500, and the heat fusion unit ( 600).

First, the first and second PLA fiber makers (100,300) are extruders (110, 310) that melt and extrude PLA (biodegradable polylactic acid) that is injected as shown in FIG. 3, and hundreds of spraying PLA melted from the extruder. The spray nozzles 130 and 330 with two small orifices, filter devices 120 and 320 provided between the extruder and the spray nozzle to filter the molten PLA, and PLA are provided on both sides of the spray nozzle and sprayed with the spray nozzle. Consists of a hot air fan (140,340) for stretching, a cooler (150,350) for cooling the stretched PLA, cutters (160,360) for cutting PLA fibers determined by stretching, and a jet hole (170,370) for spraying the cut PLA fibers do. And, the injection port is provided with valves (171, 371) that are electrically connected to the control unit to control the injection amount of the injected PLA fiber.

Here, the extruders 110 and 310 are divided into first to fifth regions. In addition, the divided first region is 150 to 160°C, the second region is 200 to 210°C, the third region is 220 to 230°C, the fourth region is 230 to 240°C, and the fifth region is at 250 to 260°C. Are set respectively.

In addition, the spray nozzles 130 and 330 have 0.88 mm per 12 to 16 cm, and high-temperature air having a high speed distribution forms various filaments between 0.1 μ and 500 μ in diameter.

A pulp supply unit 200 is disposed between the 1st PLA fiber maker 100 and the 2nd PLA fiber maker 300.

The pulp supply unit 200 may directly supply the pulp, but the pulp supply unit 200 is connected to a carding machine 210 for separating the pulp fibers made of sheets or mats into individual fibers to separate the pulp fibers made of sheets or mats. Individual fiber pulp can also be supplied.

In addition, a mesh belt 400 is provided under the 1st PLA fiber maker 100 and the pulp supply part 200 and 2nd PLA fiber maker 300 arranged side by side.

The mesh belt 400 integrates and transports the 1st and 2nd PLA fibers 　 and the pulp sprayed from the 1st PLA fiber maker 100, the pulp supply part 200, and the 2nd PLA fiber maker 300 in a web form. Let it.

In addition, the 1 PLA fiber maker 100, the pulp supply part 200, and the 2 PLA fiber maker 300 are electrically connected to the control unit 500, respectively.

The control unit 500 controls the valves 171, 220, 371 of the 1 PLA fiber maker 100, the pulp supply unit 200, and the 2 PLA fiber maker 300 to be sprayed onto the mesh belt 400. Controls the injection amount of the 2nd PLA fiber　 and the pulp and controls the injection time difference so that the 1st PLA fiber is sprayed first, the pulp is sprayed on the 1st PLA fiber 　, and the 2nd PLA fiber is controlled to be sprayed on the pulp. .

In addition, a heat-sealing part 600 is provided on one side of the mesh belt 400.

The heat-sealed part 600 is composed of a calendar through which the laminated material of 1 PLA fiber, pulp, and 2 PLA fiber 　 is passed through the mesh belt 400. The calendar is a pressing roller that polishes paper or fabric, and heat-sealing the 1st PLA fiber, the pulp, and the 2nd PLA fiber of the laminate that is passed while heat is applied to each other. At this time, the pattern is carved on the calendar to increase the bonding strength of the 1st PLA fiber, the pulp, and the 2nd PLA fiber.

4 is a flow chart for explaining a method of manufacturing a 　 eco-friendly 　 biodegradable nonwoven fabric according to an embodiment of the present invention.

　 Eco-friendly 　 biodegradable nonwoven fabric manufacturing method according to an embodiment of the present invention is to melt PLA (biodegradable polylactic acid) into an extruder and then spin through a spinning nozzle having hundreds of small orifices formed, spinning nozzle Step S10 of stretching and cooling with high-pressure hot air sprayed at high speed from both sides to make fibers 　; Step S20 of accumulating the fiberized PLA in the form of a web on the mesh belt; Step S30 of laminating the pulp on the PLA integrated in the form of a web; Step S40 of accumulating and laminating the PLA fiberized 　 in the form of a web on the pulp in step S10; And S50 step of bonding the laminated PLA, pulp, and PLA by heat fusion.

Step S10 is made in the 1st PLA fiber maker 100 and the 2nd PLA　 fiber maker 200. First, PLA (biodegradable polylactic acid) is put into the extruder 110 of the first PLA fiber maker 100 and melted.

Here, PLA has a melting point of 100 to 180 °C, a melt index of 20 to 40 g/10 minutes, and a melt density of 0.98 to 2.24 g/cm 3 (260 °C). In addition, PLA is selected from the group consisting of poly-D-lactic acid, poly-L-lactic acid, and a copolymer of D-lactic acid and L-lactic acid.

In addition, the extruder 110 is a first area with a temperature of 150 to 160°C, a second area with a temperature of 200 to 210°C, a third area with a temperature of 220 to 230°C, and a fourth area with a temperature of 230 to 240°C. , It is divided into a fifth zone in which a temperature of 250 to 260°C is set.

Accordingly, PLA is completely dissolved while passing through the first to fifth regions of the extruder 110.

Subsequently, the completely dissolved PLA is filtered by the filter device 120 and supplied to the spray nozzle 130, and the PLA supplied to the spray nozzle 130 is sprayed through hundreds of small orifices.

Subsequently, the sprayed PLA is stretched by high-pressure hot air sprayed at high speed from the hot air fan 140 and cooled by a cooler to become fibers.

And 　 the fiberized PLA is cut by the cutter 160 is sprayed through the injection hole (170). At this time, the first PLA fiber sprayed through the injection port 170 is sprayed 10% by weight to 40% by weight based on the total weight of the nonwoven fabric.

Step S20 integrates the first PLA fiber sprayed on the mesh belt 400 in the form of a web. At this time, the web formed by the Melt-Blown method has an isotrophic formation. That is, because the web is formed for high-temperature air, 　fibers are arbitrarily arranged in the machine direction and machine width direction, and are not sufficiently cooled, so that 　the fibers are mutually bonded by thermal bonding.

In step S30, the pulp sprayed from the pulp supply unit 200 is laminated on the first PLA fiber 　 that is integrated and transferred in a web form. At this time, the laminated pulp is sprayed in an amount of 25% to 80% by weight based on the total weight of the nonwoven fabric.

Step S40 is to laminate the second PLA　 fiber on the pulp. The 2nd PLA　 fiber is manufactured in the same way as in step S10 through the 2nd PLA　 fiber maker 300.

In more detail, PLA is introduced into the extruder 310 of the 2nd PLA fiber maker 300, and the PLA is completely dissolved while passing through the first to fifth regions of the extruder 310. In addition, the completely dissolved PLA is filtered through the filter device 320, supplied to the spray nozzle 330, and sprayed through hundreds of small orifices. Subsequently, the sprayed PLA is stretched by the high-pressure hot air of the hot air fan 340 and cooled by the cooler 350 to become fibers. And, the 　 fiberized PLA is cut by the cutter 360 is sprayed through the injection hole 370. At this time, the 2 PLA fiber sprayed through the injection port 370 is sprayed 10% by weight to 40% by weight based on the total weight of the nonwoven fabric.

In this way, the 2 PLA fiber manufactured by the 2 PLA fiber maker 300 is integrated in the form of a web on the pulp.

In step S50, the laminated products stacked on the mesh belt 400 in the order of 1st PLA fiber, pulp, and 2nd PLA fiber 　 are passed through the heat-sealing part 600 to thermally bond the laminates to each other.

The 　 eco-friendly 　 biodegradable nonwoven fabric manufactured by the above manufacturing method is sprayed on the mesh belt 400 as shown in FIG. 5 to form a web integrated 1 PLA fiber layer, a pulp layer stacked on the 1 PLA fiber layer, the It includes a second PLA fiber layer sprayed on the pulp layer and integrated in a web form.

(Example 1)

The 1st PLA fiber layer integrated in a web form by spraying 10% by weight based on the total weight of the nonwoven fabric on the mesh belt, the pulp layer stacked by spraying 80% by weight based on the total weight of the nonwoven fabric on the top of the 1 PLA fiber layer, and the upper part of the pulp layer 10% by weight was sprayed with respect to the total weight of the nonwoven fabric to form a second PLA fiber layer integrated in the form of a web, and then heat-sealed with each other to prepare a nonwoven fabric.

(Example 2)

The 1st PLA fiber layer integrated in a web form by spraying 25% by weight based on the total weight of the nonwoven fabric on the mesh belt, the pulp layer stacked by spraying 50% by weight based on the total weight of the nonwoven fabric on the top of the 1st PLA fiber layer, and the upper part of the pulp layer 25 wt% of the total weight of the nonwoven fabric was sprayed to form a 2 PLA fiber layer integrated in a web form, and the nonwoven fabric was manufactured by heat fusion.

(Example 3)

The 1st PLA fiber layer integrated in a web form by spraying 40% by weight based on the total weight of the nonwoven fabric on the mesh belt, the pulp layer stacked by spraying 25% by weight based on the total weight of the nonwoven fabric on the top of the 1 PLA fiber layer, the upper part of the pulp layer 40% by weight of the nonwoven fabric was sprayed to form a second PLA fiber layer integrated in a web form, and the nonwoven fabric was manufactured by heat fusion.

(Comparative Example 1)

The 1st PLA fiber layer integrated in a web form by spraying 45% by weight based on the total weight of the nonwoven fabric on the mesh belt, the pulp layer stacked by spraying 10% by weight based on the total weight of the nonwoven fabric on the top of the 1st PLA fiber layer, and the upper part of the pulp layer 45% by weight of the total weight of the nonwoven fabric was sprayed to form a 2 PLA fiber layer integrated in a web form, and heat-sealed with each other to prepare a nonwoven fabric.

(Comparative Example 2)

20% by weight of pulp, 40% by weight of polyethylene (PE), and 40% by weight of polypropylene (PP) were mixed and sprayed to prepare a nonwoven fabric.

<Test 1>

Each of the nonwoven fabrics of Examples 1, 2, and 3 and Comparative Examples 1 and 2 was evaluated for softness, volume, and water absorption, and is shown in Table 1.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Soft O O O X △ Volume O O O △ △ Absorbency O O O △ X

As shown in [Table 1], in Examples 1, 2, and 3, the 1st PLA fiber layer and the 2nd PLA fiber layer cover the outer surface of the pulp layer to protect the pulp layer, and hold the pulp so that the pulp does not break or dust Played a role. In addition, due to the pulp layer, it was found that the appropriate bulkiness was maintained, a soft touch was felt, and excellent water absorption. In Comparative Example 1, the 1st PLA fiber layer and the 2nd PLA fiber layer were formed too thick. The 1 PLA fiber layer and the 2nd PLA fiber layer were broken, the texture was rough, and the volume and water absorption were not good. That is, it was found that it is preferable that the 1st PLA fiber layer and the 2nd PLA fiber layer be used in an amount of 40% by weight or less, respectively, based on the total weight of the nonwoven fabric.

In addition, Comparative Example 2 was inferior to the examples in volume and texture, and water absorption was not good.

<Test 2>

For each of the nonwoven fabrics of Examples 1, 2, and 3 and Comparative Examples 1 and 2, environmental resistance was evaluated. In other words, under the same environmental conditions as when the non-woven fabric was buried in the ground, spray it from the front of the non-woven fabric 50 hours (hr) and 75 hours (hr) elapsed before the elapse of time, and measure the state of the non-woven fabric. Indicated.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Force(N) Elong(%) Force(N) Elong(%) Force(N) Elong(%) Force(N) Elong(%) Force(N) Elong(%) Before time 20.5 35.6 23.5 27.6 25.2 28.9 5.1 8.0 19.2 31.6 50 hours elapsed 12.9 6.5 15.9 8.5 16.3 12.0 3.5 4.0 9.0 21.0 75 hours elapsed Not measurable Not measurable Not measurable Not measurable 5.9 9.5

As shown in [Table 2], Example 1 showed an elongation of 35.6% at 20.5N before the time elapse of the manufactured nonwoven fabric, and 6.5% elongation at 12.9N after 50 hours of the nonwoven fabric elapsed, and 75 hours elongation of the nonwoven fabric After that, the corrosion of the pulp proceeded, and the corrosion of the 1st PLA fiber and the 2nd PLA fiber progressed due to biodegradation, so it was impossible to measure it. In Example 2, the elongation at 23.5N before the time elapse of the manufactured nonwoven fabric was 27.6% After 50 hours of the nonwoven fabric, the elongation at 15.9N was 8.5%, and after 75 hours of the nonwoven fabric, the pulp was corroded, and the 1st PLA fiber and the 2nd PLA fiber were torn due to the progress of corrosion. This occurred and measurement was impossible.

In addition, Example 3 showed an elongation of 28.9% at 25.2N before the time elapse of the manufactured nonwoven fabric, and 12.0% elongation at 16.3N after 50 hours of the nonwoven fabric elapsed, and the pulp corrosion progressed after 75 hours of the nonwoven fabric. And, the 1st PLA fiber and the 2nd PLA fiber were torn due to the progress of corrosion, so measurement was impossible.

In addition, Comparative Example 1 showed an elongation of 8.0% at 5.1N before the time elapse of the prepared nonwoven fabric, and 4.0% elongation at 3.5N after 50 hours of the nonwoven fabric elapsed, and the pulp corrosion progressed after 75 hours of the nonwoven fabric. And, the 1st PLA fiber and 2nd PLA 　 fiber could not be measured due to breakage.

In addition, Comparative Example 2 showed an elongation of 31.6% at 19.2N before the time elapse of the nonwoven fabric, and 21.0% elongation at 9.0N after 50 hours of the nonwoven fabric, and an elongation 9.5 at 5.9N after 75 hours of the nonwoven fabric. %. That is, although the pulp was corroded, polyethylene (PE) and polypropylene (PP) were present as they were.

As described above, in the present invention, by laminating a pulp layer and a PLA layer having biodegradable properties, the soft properties, absorbency and bulkiness of the pulp layer are improved, and the PLA layer holds and protects the pulp layer, thereby improving the mechanical strength required in actual use. In addition, by using pulp, manufacturing costs can be reduced, and as 100% biodegradation is made after disposal, environmental problems are not caused.

On the other hand, an insole manufactured by a conventional method was manufactured using Examples 1 to 3, and the result of performing a wear feeling, an antibacterial test, a deodorant test, and an absorption rate test for the shoe equipped with the insole is shown in Table 3 below. Same as ].

Inspection items Units and standards Example 1 Example 2 Example 3 Ignition Sensory test 5 5 5 Antibacterial test (%) StatphylococcusaureusKlebsiellapneumoniae 99.9 99.9 99.9 Deodorant test (%) NH3, gas detection tube method (120min) 99.9 99.9 99.9 Absorption rate test (%) Compared to Comparative Example 1 141.3 139.8 140.5

In the sensory test for the above-mentioned wearing feeling, select 5 adult men and women, and after trying on the shoes, evaluate as 5 if the feeling is very soft, 4 if it is slightly soft, 3 if it is normal, 2 if it is slightly bad, and 1 if it is very bad. According to [Table 3], it was found that the insoles according to Examples 1 to 3 were superior to the comparative examples in all of the performances of a feeling of wearing, antibacterial properties, deodorant properties, and absorption rate (sweat absorption) (Comparative Example 1 And 2 are not indicated).

100: No. 1 PLA fiber manufacturing machine
200: pulp supply unit
210: carding machine
300: 2 PLA fiber manufacturing machine
110,310: extruder
120,320: filter device
130,330: injection nozzle
140,340: hot fan
150,350: cooler
160,360: cutter
170,370: nozzle
171,220,371: valve
400: mesh belt
500: control unit
600: heat fusion unit

Claims (1)

In the shoe insole,
The insole is the following method;
(S10) PLA (biodegradable polylactic acid) is put in an extruder and melted, and then spun through a spinning nozzle with hundreds of small orifices, and drawn and cooled with high-pressure hot air sprayed at high speed from both sides of the spinning nozzle. To make fibers;
(S20) accumulating the fibrous PLA on a mesh belt in the form of a web;
(S30) laminating pulp on the PLA integrated in the web form;
(S40) accumulating and laminating the PLA fiberized in the step S10 on the pulp in the form of a web; And
(S50) bonding the laminated PLA, pulp, and PLA by thermal fusion; Breathable insole using an eco-friendly material, characterized in that the eco-friendly biodegradable nonwoven fabric manufactured according to.

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