WO2016010303A1

WO2016010303A1 - Environment-friendly and biodegradable non-woven fabric, and apparatus and method for producing same

Info

Publication number: WO2016010303A1
Application number: PCT/KR2015/007101
Authority: WO
Inventors: 구기승
Original assignee: 구기승
Priority date: 2014-07-14
Filing date: 2015-07-08
Publication date: 2016-01-21
Also published as: KR101520228B1

Abstract

Provided are environment-friendly and biodegradable non-woven fabric, and an apparatus and a method for producing same, the method for producing the non-woven fabric according to an embodiment of the present invention comprising: step S10 for producing a first PLA fiber and a second PLA fiber by inserting biodegradable PLA into respective extruders of first and second fiber-producing machines and melting, spinning by means of a spinning nozzle having hundreds of small orifices, and fiberizing by elongating and cooling by means of heated high-pressure air sprayed from both sides of the spinning nozzle at high speeds; step S20 for spraying the first PLA fiber produced from the first fiber-producing machine on a first mesh drum to accumulate into a web, and spraying the second PLA fiber produced from the second fiber-producing machine on a second mesh drum to accumulate into a web; step S30 for supplying and interposing pulp in between the first PLA fiber and second PLA fiber accumulated into webs; and step S40 for combining the first PLA fiber, pulp and second PLA fiber by thermal bonding. According to an embodiment of the present invention, the smoothness, absorbency and volumetric characteristic of the pulp are preserved by interposing pulp having smoothness, absorbency and volumetric characteristic in between the first and second PLA fibers having superb physical characteristics, non-woven fabric having superb product quality can be effectively produced as the first and second PLA layers hold and protect the pulp layer to impart the necessary mechanical strength during actual use, and the production cost can be reduced by means of a simplified process.

Description

Eco-friendly biodegradable nonwoven fabric and its manufacturing apparatus and manufacturing method

Embodiments of the present invention relate to an eco-friendly biodegradable nonwoven fabric and a manufacturing apparatus and a manufacturing method thereof, and more particularly, to an eco-friendly biodegradable nonwoven fabric and an apparatus and a manufacturing method for improving the mechanical properties of absorbent and soft and bulky will be.

In general, nonwoven refers to nonwoven fabric. That is, it refers to a fiber aggregate that is not based on spinning, weaving, or braiding, and means sheeting and bonding by physical and chemical means.

Conventional nonwoven fabrics were prepared by composite injection of high absorbency pulp and high polyethylene (PE) or polypropylene (PP) when used as a hygiene product.

However, polyethylene (PE) or polypropylene (PP) is a problem that can cause skin diseases such as itching and erythema in the soft skin because harmful components are not sprayed and absorbed, and the problem of causing environmental problems after disposal due to the non-rotating characteristics There was this.

Recently, efforts to reduce carbon dioxide due to global warming have been continuously studied. In particular, since the polymer produced from fossil fuel not only increases the amount of carbon dioxide emission but also has a limited reserve, research on polylactic acid products that can melt and polymerize the polymer synthesized from natural plants is being conducted.

Polylactic acid (PLA) forms a market of 150,000 tons in the world, and is used not only for disposable products using the biodegradable properties of PLA, but also for general plastics such as food packaging materials, containers, and electronics cases. The scope of application is expanding.

However, polylactic acid (PLA) is more expensive than polyethylene (PE) or polypropylene (PP), has a rough feel, has a small volume, and has a problem of low elasticity.

[Preceding technical literature]

Korean Publication Patent: 10-2012-0107092 (Published 2012. 09. 28)

Korea Patent Registration: 10-1075004 (Notice date 2011. 10. 19)

The present invention has been made to solve the conventional problems,

An object of the present invention is to use the pulp layer having a soft property, absorbency and volume between the first PLA layer and the second PLA layer having excellent physical properties to improve the physical properties, improve the physical properties, 100% after disposal It is to provide an eco-friendly biodegradable nonwoven fabric and a manufacturing apparatus and a manufacturing method of the biodegradation is made.

Another object of the present invention is to provide an eco-friendly biodegradable nonwoven fabric, an apparatus and a manufacturing method thereof, which can improve the quality of the nonwoven fabric and reduce the manufacturing cost.

Eco-friendly biodegradable nonwoven manufacturing apparatus according to an embodiment of the present invention provided to achieve the above object is a first PLA fiber manufacturing apparatus for fiberizing PLA; A first mesh drum integrating the first PLA fibers sprayed from the first PLA fibers in a web form; A pulp supply unit provided at one side of the first mesh drum to stack pulp on one surface of the first PLA fiber integrated on the first mesh drum; A second PLA fiber making machine provided on one side of the pulp supply unit to fiberize PLA; A second mesh drum in which the second PLA fibers sprayed from the second PLA fiber maker are integrated in a web form and laminated on one surface of the pulp; A heat fusion unit for heat-sealing the laminates by applying heat to the laminates stacked in order of the first PLA fibers, the pulp, and the second PLA fibers; And controlling the injection amount of the first and second PLA fibers manufactured by the first and second PLA fiber makers by being electrically connected to the first and second PLA fiber makers and the pulp supply unit, and the pulp supply amount of the pulp supply unit. Control unit for controlling; is configured to include.

The first and second PLA fiber making machine is an extruder for melting and extruding PLA (biodegradable polylactic acid), a spray nozzle formed with hundreds of small orifices (orifice) for spraying the molten PLA in the extruder, and the injection nozzle A hot air fan for stretching PLA sprayed from the spray nozzle by spraying high-pressure hot air from both sides of the cooler, a cooler for cooling the stretched PLA, a cutter for cutting the PLA fiber determined by the stretching, and spraying the cut PLA fiber Characterized in that configured to include a jet.

Between the extruder and the injection nozzle is characterized in that it further comprises a filter device for filtering the molten PLA.

The extruder is divided into first to fifth regions, the first region is 150 to 160 ℃, the second region is 200 to 210 ℃, the third region is 220 to 230 ℃, the fourth region is 230 to 240 ℃, The five regions are characterized in that a temperature of 250 to 260 캜 is set.

The pulp supply unit is characterized in that the carding machine for separating the pulp fibers consisting of sheets or mats into individual fibers are connected.

The control unit controls the injection amount of the first PLA fiber manufacturing machine so that the first PLA fiber of 10% by weight to 40% by weight relative to the total weight of the nonwoven fabric, and 25% to 80% by weight of pulp is supplied to the total weight of the nonwoven fabric. The supply amount of the pulp supply unit is controlled so as to control the injection amount of the second PLA fiber maker so that the second PLA fiber of 10% by weight to 40% by weight relative to the total weight of the nonwoven fabric is injected.

Eco-friendly biodegradable nonwoven fabric manufacturing method according to an embodiment of the present invention is melted by putting PLA (biodegradable polylactic acid) into the extruder of the first and second fiber makers, respectively, and then through a spinning nozzle formed of hundreds of small orifices (Orifice) S10 step of producing the first PLA fibers and the second PLA fibers by spinning and cooling with high-pressure hot air sprayed at high speed from both sides of the spinning nozzle; Spraying the first PLA fiber produced in the first fiber maker on the first mesh drum to integrate in the form of a web (Web), and the second PLA fiber produced in the second fiber maker sprayed on the second mesh drum S20 step of integrating in the form of a web (Web); S30 step of supplying and interposing pulp between the first PLA fiber and the second PLA fiber integrated in the web form; It is prepared, including; S40 step of bonding the first PLA fibers, pulp, second PLA fibers by heat fusion bonding.

The extruder has a first region having a temperature of 150 to 160 ° C., a second region having a temperature of 200 to 210 ° C., a third region having a temperature of 220 to 230 ° C., a fourth region having a temperature of 230 to 240 ° C., and a 250 to 260 ° C. The temperature is divided into a fifth region is set, the PLA is characterized in that complete melting through the first to fifth regions.

And, the step S10 characterized in that it further comprises the step of filtering the molten PLA.

In addition, the PLA is characterized in that selected from the group consisting of poly-D-lactic acid, poly-L-lactic acid, copolymers of D-lactic acid and L-lactic acid.

In addition, the PLA has a melting point of 100 ℃ to 180 ℃, the melt index is 75 to 120g / 10 minutes, the melt density is characterized in that it has a characteristic in the range of 0.98 to 2.24g / cm3 (260 ℃).

The pulp is characterized in that the pulp fibers made of a sheet or mat put into a carding machine and separated into individual fibers.

The first PLA fibers are injected by injecting 10% by weight to 40% by weight of the total weight of the nonwoven fabric, and the pulp is fed by 25% by weight to 80% by weight of the total weight of the nonwoven fabric. 10% by weight to 40% by weight is characterized in that the injection is integrated.

Eco-friendly biodegradable nonwoven fabric according to an embodiment of the present invention, the first PLA fiber layer integrated in the form of a web on the first mesh drum by the above production method; A pulp layer laminated on the first PLA fiber layer; The second PLA fiber layer is integrated on the second mesh drum in the form of a web and laminated on the upper surface of the pulp layer.

An embodiment of the present invention utilizes the soft properties, absorbency and volume of the pulp, the first PLA fiber and the second PLA fiber through the pulp having a soft property and absorbency and volume between the first and second PLA fibers having excellent physical properties By holding and protecting the pulp to have the mechanical strength required in actual use, it is possible to efficiently manufacture high-quality nonwoven fabrics, and to reduce the manufacturing cost through a simple process.

In addition, by using the pulp can reduce the manufacturing cost, 100% biodegradation after disposal, does not cause environmental problems, does not emit carcinogens or harmful substances to hygiene, hygiene and hygiene is excellent And it becomes possible to manufacture a nonwoven fabric with improved safety.

In addition, since the first and second PLA fibers hold the surface of the pulp, it is possible to wash, thereby producing a non-woven fabric that can be used repeatedly.

1 is a schematic diagram for explaining the eco-friendly biodegradable nonwoven fabric manufacturing apparatus according to an embodiment of the present invention.

Figure 2 is a block diagram for explaining the overall configuration of the eco-friendly biodegradable nonwoven fabric manufacturing apparatus according to an embodiment of the present invention.

Figure 3 is a block diagram for explaining the configuration of the first, second PLA fiber manufacturing apparatus in an eco-friendly biodegradable nonwoven fabric manufacturing apparatus according to an embodiment of the present invention.

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

Figure 5 is a cross-sectional view showing an eco-friendly biodegradable nonwoven fabric according to an embodiment of the present invention.

The above objects, features and other advantages of the present invention will become more apparent by describing the preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, with reference to the accompanying drawings will be described in detail the eco-friendly biodegradable non-woven fabric and its manufacturing apparatus and manufacturing method of the present invention. For the purposes of this specification, like reference numerals in the drawings denote like parts unless otherwise indicated.

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

As shown in FIG. 1, FIG. 2, the apparatus for producing eco-friendly biodegradable nonwoven fabric includes a first PLA fiber maker 100, a first mesh drum 200, a second PLA fiber maker 300, and a second mesh drum 400. It includes a pulp supply unit 500, the control unit 600, the heat fusion unit 700.

First, the first and second

PLA fiber makers

100 and 300 are extruders 110 and 310 for melting and extruding PLA (biodegradable polylactic acid) introduced as shown in FIG. 3, and hundreds of spraying molten PLA from the extruder. Injection nozzles 130 and 330 having two small orifices formed therein, filter devices 120 and 320 provided between the extruder and the injection nozzle to filter the molten PLA, and PLAs which are provided on both sides of the injection nozzles and sprayed by the injection nozzles. It comprises a hot air fan (140,340) for stretching, a cooler (150,350) for cooling the stretched PLA, cutters (160,360) for cutting the PLA fiber determined by the stretching, and injection holes (170,370) for spraying the cut PLA fiber do. And, the injection port is provided with valves (171, 371) for controlling the injection amount of the PLA fiber is electrically connected to the control unit.

Here, the extruders 110 and 310 are partitioned into first to fifth regions. Then, the partitioned first region is 150 to 160 캜, the second region is 200 to 210 캜, the third region is 220 to 230 캜, the fourth region is 230 to 240 캜 and the fifth region is 250 to 260 캜. Are set respectively.

The injection nozzles 130 and 330 have 0.88 mm per 12 to 16 cm, and hot air having a high velocity distribution forms various filaments between 0.1 μm and 500 μ in diameter.

A first mesh drum 200 is disposed below the first PLA fiber maker 100, and a second mesh drum 400 is disposed below the second PLA fiber maker 300.

In addition, the first mesh drum 200 integrates the first PLA fiber 10 sprayed from the first PLA fiber maker 100 into a web form, and the second mesh drum 400 is the second PLA fiber maker 300. Integrate the second PLA fiber 30 is injected in the form of a web.

The pulp supply unit 500 is disposed between the first mesh drum 200 and the second mesh drum 400.

The pulp supply unit 500 supplies the pulp between the first mesh drum 200 and the second mesh drum 400 to integrate the first PLA fiber 10 and the second PLA fiber in a web form on the first mesh drum 200. The pulp 20 is interposed between the second PLA fibers 30 integrated in the web form on the mesh drum 400.

Here, the pulp supply unit 500 may directly supply pulp, but the pulp supply unit 500 is connected to a carding machine 510 which separates the pulp fibers made of sheets or mats into individual fibers to connect pulp fibers made of sheets or mats. The pulp of the separated individual fibers can also be fed.

The first PLA fiber maker 100, the second PLA fiber maker 300, and the pulp supply unit 500 is electrically connected to the control unit 600, respectively.

The control unit 600 controls the

valves

171, 371, and 520 of the first PLA fiber maker 100, the second PLA fiber maker 300, and the pulp supply unit 500 to control the injection amount of the first and second PLA fibers and pulp. To control. In addition, the first and second PLA fibers are first sprayed to be integrated in a web form on the first and second mesh drums 200 and 400, and then the pulp is interposed between the first and second PLA fibers integrated in a web form. The injection time difference between the first and second PLA and the pulp is controlled so as to be effective.

Then, one side of the second mesh drum 400 is provided with a heat fusion unit 700.

The heat-sealed portion 700 is composed of a calendar through which a laminate stacked in the order of the first PLA fibers, pulp, and the second PLA fibers guided by the second mesh drum 400. The calendar is a compression roller that lubricates paper or paper, and heat-bonds the first PLA fibers, the pulp, and the second PLA fibers of the laminate to be passed in a state where heat is applied. At this time, the pattern is engraved on the calendar to increase the bonding force of the first PLA fiber, pulp, the second PLA fiber.

Eco-friendly biodegradable nonwoven fabric according to an embodiment of the present invention is a PLA (biodegradable polylactic acid) is put into the extruder of the first and second fiber makers, respectively, melted and then spinning nozzles formed with hundreds of small orifices (Orifice) S10 step of producing the first PLA fiber and the second PLA fiber by stretching through and cooling with high-pressure hot air sprayed at high speed from both sides of the spinning nozzle; Injecting the first PLA fiber produced in the first fiber maker on the first mesh drum to integrate in the form of a web (Web), and by spraying the second PLA fiber produced in the second fiber maker on the second mesh drum S20 step of integrating in the form of a web (Web); S30 step of supplying the pulp interposed between the first PLA fiber and the second PLA fiber integrated in the web form; 1 PLA fiber, pulp, S40 step of bonding the second PLA fiber by heat fusion; It is prepared to include.

Step S10 is made in the first PLA fiber manufacturing machine 100 and the second PLA fiber manufacturing machine (300).

First, PLA (biodegradable polylactic acid) is put into the extruders 110 and 310 of the first PLA fiber maker 100 and the second PLA fiber maker 300 to melt.

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

The extruders 110 and 310 may include a first region having a temperature of 150 to 160 ° C., a second region having a temperature of 200 to 210 ° C., a third region having a temperature of 220 to 230 ° C., and a fourth region having a temperature of 230 to 240 ° C. It is partitioned into the 5th area | region set at 250-260 degreeC temperature.

Therefore, PLA is completely dissolved while passing through the first to fifth regions of the extruders 110 and 310.

Subsequently, the completely dissolved PLA is filtered through the filter devices 120 and 320 and supplied to the injection nozzle 130, and the PLA supplied to the injection nozzles 130 and 330 is injected through hundreds of small orifices.

Subsequently, the injected PLA is stretched by the high pressure hot air sprayed at high speed by the hot air fans 140 and 340, and cooled and fiberized by the coolers 150 and 350.

The fiberized PLA is cut through the cutters 160 and 360 and sprayed through the injection holes 170 and 370. At this time, the first PLA fibers 10 and the second PLA fibers 30, which are sprayed to the injection holes 170 and 370 are sprayed 10% to 40% by weight relative to the total weight of the nonwoven fabric.

In step S20, the first PLA fiber 10 manufactured by the first fiber maker 100 is sprayed on the first mesh drum 200, and the first mesh drum 200 is sprayed on the first PLA fiber 10. In the form of a Web. Then, the second PLA fiber 30 manufactured in the second fiber maker 300 is sprayed on the second mesh drum 400, the second mesh drum 400 is sprayed on the second PLA fiber (30) Integrate in the form of Web.

In this case, the web formed by the Melt-Blown method has an isotrophic formation. That is, since the web is formed for hot air, the fibers are arbitrarily arranged in the machine direction and the machine width direction, and are not sufficiently cooled so that mutual bonding is achieved by thermal bonding between the fibers.

In step S30, the pulp 20 injected from the pulp supply unit 500 is interposed between the first PLA fiber 10 and the second PLA fiber 30 which are integrated and transported in a web form. At this time, the pulp 20 is 25% by weight to 80% by weight relative to the total weight of the nonwoven fabric.

In step S40, the laminate stacked in order of the first PLA fibers 10, the pulp 20, and the second PLA fibers 30 is passed through the heat-sealed portion 700 to thermally bond the laminates to each other.

As shown in FIG. 5, the first PLA fiber layer integrated in a web form on the first mesh drum, the pulp layer laminated on one surface of the first PLA fiber layer, and the web form integrated on the second mesh drum by the above manufacturing method. The second PLA fiber layer laminated on one surface of the pulp layer is heat-sealed to produce a nonwoven fabric.

(Example 1)

10% by weight relative to the total weight of the nonwoven fabric on the first mesh drum, the first pulp fiber layer integrated in the form of a web, pulp layer laminated by spraying 80% by weight relative to the total weight of the nonwoven fabric on one surface of the first PLA fiber layer, 10 wt% of the total weight of the nonwoven fabric was sprayed onto the two-mesh drum, and the second PLA fiber layer laminated on one surface of the pulp layer was integrated in a web form to prepare a nonwoven fabric.

(Example 2)

25% by weight of the total weight of the nonwoven fabric is sprayed onto the first mesh drum, and the pulp layer is laminated by spraying 50% by weight of the total weight of the nonwoven fabric on one surface of the first PLA fiber layer and the first PLA fiber layer. A nonwoven fabric was prepared by spraying 25 wt% of the total weight of the nonwoven fabric on a two-mesh drum and integrating the second PLA fiber layer laminated on one surface of the pulp layer by integrating a web.

(Example 3)

40% by weight relative to the total weight of the nonwoven fabric on the first mesh drum, the first PLA fiber layer integrated in the form of a web, a pulp layer laminated by spraying 20% by weight relative to the total weight of the nonwoven fabric on one surface of the first PLA fiber layer, 40 wt% of the nonwoven fabric was sprayed onto the two mesh drums and integrated in a web form to form a nonwoven fabric by mutually thermally bonding a second PLA fiber layer laminated on one surface of the pulp layer.

(Comparative Example 1)

45% by weight relative to the total weight of the nonwoven fabric on the first mesh drum, a pulp layer laminated by spraying 10% by weight relative to the total weight of the nonwoven fabric on one surface of the first PLA fiber layer integrated in the web form, the first PLA fiber layer, 45 wt% of the total weight of the nonwoven fabric was sprayed onto the two-mesh drum, and the second PLA fiber layer laminated on one surface of the pulp layer was integrated in a web form, thereby manufacturing 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 composite sprayed to prepare a nonwoven fabric.

Softness, volume, and water absorption were evaluated for each of the nonwoven fabrics of Examples 1, 2, and 3 and Comparative Examples 1 and 2, and are shown in [Table 1].

Table 1

	Example 1	Example 2	Example 3	Comparative Example 1	Comparative Example 2
Soft	○	○	○	×	△
Bulky	○	○	○	△	△
Absorbency	○	○	○	△	×

As shown in Table 1, Examples 1, 2, and 3 show that the first PLA fiber layer and the second PLA fiber layer wrap the outer surface of the pulp layer to protect the pulp layer, and hold the pulp without breaking the pulp or dust. Played a role. In addition, it could be seen that due to the pulp layer to maintain a proper sense of volume, it was able to feel a soft texture, excellent absorbency.

In Comparative Example 1, the first PLA fiber layer and the second PLA fiber layer were formed so thick that the breakage of the first PLA fiber layer and the second PLA fiber layer occurred, the texture was rough, and the volume and absorbency were not good. That is, it can be seen that the first PLA fiber layer and the second PLA fiber layer is preferably used 40% by weight or less based on the total weight of the nonwoven fabric.

In addition, Comparative Example 2 was inferior in volume and feel compared to the examples, and the absorbency was also not good.

Environmental resistance was evaluated about each of the nonwoven fabrics of Examples 1, 2 and 3 and Comparative Examples 1 and 2. That is, the state of the nonwoven fabric is measured by spraying the front surface of the nonwoven fabric 50 hours (hr) and 75 hours (hr) before the time elapsed under the same conditions as when the nonwoven fabric is buried in the ground. Indicated.

TABLE 2

	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-lapse	20.5	35.6	23.5	27.6	25.2	28.9	5.1	8.0	19.2	31.6
50 hours	12.9	6.5	15.9	8.5	16.3	12.0	3.5	4.0	9.0	21.0
75 hours	Not measurable		Not measurable		Not measurable		Not measurable		5.9	9.5

As shown in [Table 2], Example 1 exhibited an elongation of 35.6% at 20.5N before time elapse of the nonwoven fabric, followed by an elongation of 6.5% at 12.9N after 50 hours of nonwoven fabric, and after 75 hours of nonwoven fabric. Corrosion of the pulp progressed, the first PLA fiber and the second PLA fiber was not possible due to the progress of corrosion due to biodegradation.

In addition, Example 2 exhibited an elongation of 27.6% at 23.5 N before the time-lapse of the nonwoven fabric, an elongation of 8.5% at 15.9 N after 50 hours of nonwoven fabric, and corrosion of the pulp proceeded after 75 hours of nonwoven fabric. In addition, the first PLA fiber and the second PLA fiber can not be measured because the tear due to the progress of corrosion.

In addition, Example 3 exhibited an elongation of 28.9% at 25.2N before the time-lapse of the nonwoven fabric, an elongation of 12.0% at 16.3N after 50 hours of nonwoven fabric, and corrosion of the pulp proceeded after 75 hours of nonwoven fabric. The first PLA fibers and the second PLA fibers were torn due to the progress of corrosion and could not be measured.

In Comparative Example 1, the elongation was 8.0% at 5.1N before the time passed of the nonwoven fabric, the elongation was 4.0% at 3.5N after 50 hours of the nonwoven fabric, and the corrosion of the pulp proceeded after 75 hours of the nonwoven fabric. The first PLA fiber and the second PLA fiber could not be measured due to breakage.

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

As described above, the present invention provides a nonwoven fabric by laminating the first PLA fiber, the pulp, and the second PLA fiber, which have biodegradation properties, thereby improving the softness, absorbency, and bulkiness of the pulp, and the first and second PLA fibers are made of pulp. It is held and protected to provide a nonwoven fabric that enhances the mechanical strength needed in practical use.

In addition, by using the pulp can reduce the manufacturing cost, and 100% biodegradation after disposal is provided to provide a non-woven fabric does not cause environmental problems.

In addition, it is possible to provide a non-woven fabric that is excellent in breathability and refreshing comfort without emitting carcinogens or substances harmful to hygiene, thereby improving hygiene and safety.

In addition, the first and second PLA fibers to hold the surface of the pulp, which can be washed, thereby providing a non-woven fabric that can be used repeatedly.

[Description of the code]

100: the first PLA fiber manufacturing machine 200: the first mesh drum

300: the second PLA fiber manufacturing machine 110,310: extruder

120,320: filter device 130,330: injection nozzle

140,340: Hot air fan 150,350: Cooler

160,360: cutter 170,370: nozzle

171,371,520 valve 400: second mesh drum

500: pulp supply unit 510: carding machine

600: control unit 700: heat fusion unit

Claims

A first PLA fiber maker for fiberizing PLA;

A first mesh drum for integrating the first PLA fibers injected from the first PLA fiber maker into a web form;

A pulp supply unit provided on one side of the first mesh drum and stacking pulp on one surface of the first PLA fiber integrated on the first mesh drum;

A second PLA fiber making machine provided on one side of the pulp supply unit to fiberize PLA;

A second mesh drum in which the second PLA fibers sprayed from the second PLA fiber maker are integrated in a web form and laminated on one surface of the pulp;

A heat fusion unit for heat-sealing the laminates by applying heat to the laminates stacked in order of the first PLA fibers, the pulp, and the second PLA fibers; And

The first and second PLA fiber makers are electrically connected to the pulp supply unit to control the injection amount of the first and second PLA fibers produced in the first and second PLA fiber makers, and to control the pulp supply amount of the pulp supply unit A control unit;

Eco-friendly biodegradable nonwoven manufacturing apparatus comprising a.
The method of claim 1,

The first and second PLA fiber making machine is an extruder for melting and extruding PLA (biodegradable polylactic acid), a spray nozzle formed with hundreds of small orifices (orifice) for spraying the molten PLA in the extruder, and the injection nozzle A hot air fan for stretching PLA sprayed from the spray nozzle by spraying high-pressure hot air from both sides of the cooler, a cooler for cooling the stretched PLA, a cutter for cutting the PLA fiber determined by the stretching, and spraying the cut PLA fiber Eco-friendly biodegradable nonwoven fabric manufacturing apparatus characterized in that it comprises a nozzle to.
The method of claim 2,

Eco-friendly biodegradable nonwoven fabric manufacturing apparatus, characterized in that further comprising a filter device for filtering the molten PLA between the extruder and the injection nozzle.
The method of claim 2,

The extruder is divided into first to fifth regions, the first region is 150 to 160 ℃, the second region is 200 to 210 ℃, the third region is 220 to 230 ℃, the fourth region is 230 to 240 ℃, Eco-friendly biodegradable nonwoven fabric production apparatus, characterized in that the five areas are set the temperature of 250 ~ 260 ℃.
The method of claim 1,

The pulp supply unit is an eco-friendly biodegradable nonwoven fabric manufacturing apparatus, characterized in that the carding machine for separating the pulp fibers made of a sheet or mat into individual fibers are connected.
The method of claim 1,

The control unit controls the injection amount of the first PLA fiber manufacturing machine so that the first PLA fiber of 10% by weight to 40% by weight relative to the total weight of the nonwoven fabric, and 25% to 80% by weight of pulp is supplied to the total weight of the nonwoven fabric. Controlling the supply amount of the pulp supply unit so as to, the eco-friendly biodegradable nonwoven fabric manufacturing apparatus, characterized in that for controlling the injection amount of the second PLA fiber manufacturing machine so that the second PLA fiber of 10% by weight to 40% by weight relative to the total weight of the nonwoven fabric.
PLA (biodegradable polylactic acid) was put into the extruder of the first and second fiber makers, respectively, and melted, and then spun through a spinning nozzle formed with hundreds of small orifices, and then sprayed with high pressure hot air sprayed at high speed from both sides of the spinning nozzle. S10 step of producing the first PLA fiber and the second PLA fiber by stretching and cooling;

Spraying the first PLA fiber produced in the first fiber maker on the first mesh drum to integrate in the form of a web (Web), and the second PLA fiber produced in the second fiber maker sprayed on the second mesh drum S20 step of integrating in the form of a web (Web);

S30 step of supplying and interposing pulp between the first PLA fiber and the second PLA fiber integrated in the web form;

S40 step of bonding the first PLA fibers, pulp, second PLA fibers by heat fusion;

Eco-friendly biodegradable nonwoven manufacturing method comprising a.
The method of claim 7, wherein

The extruder has a first region having a temperature of 150 to 160 ° C., a second region having a temperature of 200 to 210 ° C., a third region having a temperature of 220 to 230 ° C., a fourth region having a temperature of 230 to 240 ° C., and a 250 to 260 ° C. Eco-friendly biodegradable non-woven fabric manufacturing method characterized in that partitioned into a fifth zone is set, the PLA is completely dissolved through the first to fifth zones.
The method of claim 7, wherein

The step S10 is eco-friendly biodegradable nonwoven fabric manufacturing method characterized in that it further comprises the step of filtering the molten PLA.
The method of claim 7, wherein

The PLA is an eco-friendly biodegradable nonwoven fabric manufacturing method, characterized in that selected from the group consisting of poly-D-lactic acid, poly-L-lactic acid, copolymers of D-lactic acid and L-lactic acid.
The method of claim 7, wherein

The PLA has a melting point of 100 ℃ to 180 ℃, the melt index is 75 to 120 g / 10 minutes, melt density is 0.98 to 2.24 g / cm 3 (260 ℃) characterized in that the eco-friendly biodegradable non-woven fabric manufacturing method.
The method of claim 7, wherein

The pulp is an eco-friendly biodegradable non-woven fabric manufacturing method characterized in that the pulp fibers made of a sheet or mat put into a carding machine and separated into individual fibers.
The method of claim 7, wherein

The first PLA fibers are injected by injecting 10% by weight to 40% by weight of the total weight of the nonwoven fabric, and the pulp is fed by 25% by weight to 80% by weight of the total weight of the nonwoven fabric. Eco-friendly biodegradable non-woven fabric manufacturing method characterized in that the injection by 10% by weight to 40% by weight.
According to any one of claims 7 to 13, the first PLA fiber layer integrated in the form of a web on the first mesh drum; A pulp layer laminated on the first PLA fiber layer; Eco-friendly biodegradable non-woven fabric comprising a second PLA fiber layer is integrated in the form of a web (Web) on the second mesh drum is laminated on the upper surface of the pulp layer is manufactured by mutual heat-sealing.