KR20090132138A - Multi-layer nonwoven fabric comprising a nanofiber for mulching - Google Patents

Abstract

PURPOSE: Multi-layered nonwoven fabrics are provided to improve permeability, weatherability, drainage, thermal insulation power, and sun light reflection and shield effects, and to offer good anti-bacterial and antivirus effects. CONSTITUTION: A manufacturing method of multi-layered nonwoven fabrics includes a first layer manufacturing step(P100), a second layer manufacturing step(P200), a third layer manufacturing step(P300), a fourth layer manufacturing step(P400), a fifth layer manufacturing step(P500), and a fabric bonding step(P600). Each step is performed randomly. The multi-layered nonwoven fabrics passing through the fabric bonding step is completed after a post-processing step(P700).

Description

Multi-layer nonwoven fabric comprising a nanofiber for mulching

The present invention relates to a multilayer nonwoven fabric for mulching used in agriculture. More particularly, the present invention relates to a multi-layered nonwoven fabric for mulching, including a nanofiber nonwoven fabric.

Mulching films such as vinyl have the functions of suppressing water evaporation, maintaining temperature, preventing annual and winter seas, preventing soil loss, preventing soil frying, and reducing dust and scattering dust. Has been used. However, in the case of the conventional polyethylene film, the shortage of air permeability and drainage has a disadvantage of peeling off the vinyl in the case of watering, and has a serious problem of inhibiting the growth and growth of cultivated crops due to poor drainage of water or moisture. . In addition, there is a disadvantage such as causing environmental pollution due to waste vinyl, easy to tear during installation.

Recently, in order to overcome the drawbacks of the conventional mulching film, a method of improving breathability and drainage by using a nonwoven fabric and allowing water to be absorbed evenly has been proposed. In this way, Korean Patent No. 10-0742962 discloses a method of manufacturing a polypropylene spunbond nonwoven fabric having a double-sided bicolor multilayer structure. In addition, the Republic of Korea Patent Registration 10-0787507 and 10-0545271 for the purpose of reducing the environmental load of the existing vinyl has been proposed a method for producing a mulching film using a photodegradable and biodegradable material.

However, when using the nonwoven fabric as described above, the diameter of the fiber is dozens of hundreds of micrometers are used do not have sufficient solar reflection and blocking effect, it is difficult to expect a sufficient waterproof moisture permeability, antibacterial, antifungal, anti-insect and anti Functions such as viruses cannot be expected. In addition, since the master batch chip is manufactured and melt-spun to realize dichroism, there is a disadvantage in that it is difficult to manufacture in a form containing a functional natural extract or a synthetic antimicrobial agent as well as an increase in unit cost.

The present invention provides a multi-layered nonwoven fabric for mulching having excellent antibacterial, antifungal, anti-insect and antiviral functions as well as excellent breathability, weather resistance, drainage, heat retention, and solar reflection and blocking effects by including nanofiber nonwoven fabrics. The purpose.

The present invention provides a multilayer nonwoven fabric for mulching comprising at least one nonwoven fabric selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric and at least one nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm in a laminated form.

The nanofiber nonwoven fabric may be laminated in an amount of 1 gsm to 100 gsm based on the multi-layered nonwoven fabric for mulching.

The present invention includes a nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm, so that it has excellent antibacterial, antifungal, anti-insect and antiviral functions as well as excellent breathability, weather resistance, drainage, heat retention, and solar reflection and blocking effects. Provided is a multilayer nonwoven fabric for mulching.

In addition, not only is it easy to manufacture the nanofiber nonwoven fabric through electrospinning, it is also easy to mount the functional materials to the nanofiber nonwoven fabric, such a function can be economically implemented and can be easily enhanced.

Therefore, the multi-layered nonwoven fabric for mulching of the present invention can be expected for a variety of applications as high-range vegetables, nails, ginseng field, fruit coloring, curtains, pepper drying, fish farming, front coating, insect repellent, shading. .

The present invention relates to a multi-layered nonwoven fabric for mulching comprising at least one nonwoven fabric selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric and at least one nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm in a laminated form.

The multi-layered nonwoven fabric for mulching has a nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm, thereby providing breathability, weather resistance, and drainage, as well as heat retention, solar reflection and blocking effects, antibacterial, antifungal, anti-insect, and antiviral functions. It is greatly improved and has excellent functionality as a mulching film.

When the fiber diameter of the nanofiber nonwoven fabric is less than 10 nm, the blocking effect of the contaminant is no longer increased, and when it exceeds 1 μm, the microcontaminant is likely to penetrate. Therefore, it is preferable that the fiber diameter of a nanofiber nonwoven fabric is 10 nm-1 micrometer.

In the multi-layered nonwoven fabric for mulching of the present invention, the nanofiber nonwoven fabric is preferably included in an amount of 1 gsm to 100 gsm, based on the multi-layered nonwoven fabric for mulching. Can be avoided and the problems of air permeability inhibition and cost increase due to excessive inclusion are avoided.

The number and lamination positions of the nonwoven fabric constituting the multi-layered nonwoven fabric for mulching can be freely selected according to the use. For example, spunbond nonwoven fabrics can be stacked in an appropriate number of effective locations when these properties are needed because of their high strength, thickness, and large voids. Meltblown nonwoven fabrics have smaller strength, thickness, and pore sizes than spunbond nonwoven fabrics. Since the strength, thickness, and pore size are larger than those of the nanofiber nonwoven fabric, it can be laminated in an effective position in an appropriate number for the multi-layered nonwoven fabric for mulching in consideration of such characteristics.In the case of the nanofiber nonwoven fabric, the strength is weak, and the thickness and Because the pores are very small in size, they can be stacked in any number necessary for the most effective location for those properties. Hereinafter, the laminated structure will be described with specific examples.

The multi-layered nonwoven fabric for mulching of the present invention may have a form in which the spunbond nonwoven fabric or the meltblown nonwoven fabric and the nanofiber nonwoven fabric are laminated in two layers. In this case, the nonwoven fabric is light and thus may be used as a curtain in a general house. have.

In addition, the multi-layered nonwoven fabric for mulching of the present invention includes a form in which at least one nonwoven fabric selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric and one nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm are laminated in three or more layers. The nanofiber nonwoven fabric may have desirable properties such as durability when formed in a layer other than the outermost layer. That is, since the nanofiber nonwoven fabric is weaker than the spunbond nonwoven fabric or the meltblown nonwoven fabric, the nanofiber nonwoven fabric may have more excellent durability when protected by the sandwich type as described above. In addition, the functional aspect of the nanofiber nonwoven fabric can be maintained for a longer time in the case of filtering large dust, bacteria, etc. in the outer layer laminated on the top and bottom of the nanofiber nonwoven fabric in terms of functionality.

In the present invention, a spunbond nonwoven fabric having a fiber diameter of about 10 μm to 30 μm and a meltblown nonwoven fabric having a fiber diameter of about 3 μm to 20 μm may be used.

In addition, the multi-layered nonwoven fabric for mulching of the present invention includes a laminate of three layers in which a spunbond nonwoven fabric, a meltblown nonwoven fabric and a nanofiber nonwoven fabric are sequentially stacked, and one selected from the spunbond nonwoven fabric and the meltblown nonwoven fabric, or When two nonwoven fabrics are laminated on the nanofiber nonwoven fabric, they may have desirable properties in durability and the like. That is, when laminated in such a form, the strength of the multi-layered nonwoven fabric for mulching is supplemented by the spunbond nonwoven fabric, and the non-woven fabric having a large void size is disposed on the outer layer and the non-woven fabric having a small void space on the inner layer, depending on the size of the voids. Small meltblown nonwovens or nanofiber nonwovens can have the effect of maintaining their function longer. In addition, as mentioned above, it is possible to impart excellent durability to the multi-layered nonwoven fabric for mulching by preventing the nanofiber nonwoven fabric having a weak strength from being disposed at the outermost portion.

Nanofiber nonwoven fabric included in the multi-layered nonwoven fabric for mulching of the present invention is prepared by electrospinning, nanosilver, titanium dioxide (TiO ₂ ), functional natural extracts, synthetic antimicrobial agents, pigments, dyes, water absorbers and ultraviolet stabilizers In the case of further comprising one or more components selected from the group consisting of the multi-layered nonwoven fabric for mulching of the present invention mentioned above can be further improved and enhanced.

Nanofiber nonwoven fabric used in the present invention can be easily produced by the following method.

That is, at least one component selected from the group consisting of a fiber-forming polymer and, if necessary, a salt compound containing silver, titanium dioxide (TiO ₂ ), a functional natural extract, a synthetic antimicrobial agent, a pigment, a moisture absorbent, an ultraviolet stabilizer, and the like. Preparing a spinning solution by dissolving at least one solvent selected from the group consisting of an organic solvent and a water-soluble solvent; And

It can be prepared including the step of electrospinning the spinning solution.

When functional materials are included in the spinning solution in the above manner, since such materials are strongly adhered to the nanofibers, they can be used for a long time.

Referring to the above manufacturing method in more detail as follows.

1) Preparation of spinning solution

As the fiber forming polymer, any polymer capable of forming fibers by electrospinning may be used. For example, thermoplastic or thermosetting, biocompatible polymers, biodegradable polymers, natural polymers, and the like may be used. Preferably, polyurethane (PU), polyacrylonitrile (PAN), nylon (Nylon 6, 66), poly Lactic acid (PLA), Polycarbonate (PC), Polyvinylidene chloride (PVDC), Polyvinylidene fluoride (PVdF), Polyvinyl alcohol (PVA), Polyethylene oxide (PEO), Polystyrene (PS), Polyvinyl cover Sol (PVC), polyvinylpiolidine (PVP), polyamide, polybenzylimidazole (PBI), polyethylene terephthalate (PET), cellulose acetate, collagen and polyester (PE), It may be selected from the group consisting of ASA (Acrylate-Styrene-Acrylonitrile) resin.

As the salt compound containing silver, silver nitrate, silver sulfuric acid, silver chloride and the like can be used.

The functional natural extracts include at least one member selected from the group belonging to camphoraceae, cypressaceae, pineaceae, cedar, arboraceae, green tea, camellias, cedar, unfertilaceae, rosaceae, pomegranate, asteraceae, and herbaceae. Extracts obtained from plants can be used. Specific examples include cinnamon extract, phytoncite, and bark extract.

The at least one functional material selected from the group consisting of a salt compound containing silver, titanium dioxide (TiO ₂ ), a natural functional extract, a synthetic antimicrobial agent, a pigment, a water absorbent, and an ultraviolet stabilizer is 100 wt% of the fiber-forming polymer solids. It may be added in 1 to 30 parts by weight based on parts. When the functional material is added in less than 1 part by weight, the expression of the functional is insufficient, even when added in excess of 30 parts by weight does not appear any more effect and only causes a waste of the addition amount.

The solvent is DMA (dimethyl acetamide), DMF (N, N-dimethylformamide), NMP (N-methyl-2-pyrrolidinone), DMSO (dimethyl sulfoxide), THF (tetra-hydrofuran), EC (ethylene carbonate), DEC ( diethyl carbonate, dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), propylene carbonate (PC), alcohols (methanol, ethanol), and acetone (acetone). Can be.

The spinning solution is prepared by considering spinnable concentration, viscosity, surface tension, and electrical conductivity of the solution.

2) electrospinning

The spinning solution was connected to an electrospinning nozzle using a solution supply device, and a high electric field (5 kV ~ 100 kV) was formed between the nozzle and the current collector using a high voltage generator to perform electrospinning. do. In this case, as the electrospinning apparatus to be used, a method generally used may be used, and an electro-blowing method or a centrifugal electrospinning method may be used. The diameter of the nanofibers prepared by the above method has a nonwoven fabric composed mostly of less than 1㎛.

The spunbonded nonwoven fabric and the meltblown nonwoven fabric used in the present invention may be used without limitation, those conventionally used in this field, and in particular, those prepared by sufficiently including an ultraviolet stabilizer may be preferably used. Moreover, you may use the thing containing a water absorbent further as needed.

In the present invention, the multi-layered nonwoven fabric for mulching has excellent reflection and blocking ability of sunlight, and such a function can be obtained by the following configuration.

First, one or more nonwoven fabrics, including the outermost layer on one side of the multi-layered nonwoven fabric for forming a layer which is directly or indirectly bonded thereto, have a white or metallic color having the ability to reflect or block light, or to reflect and block light. Or what constitutes a multilayer nonwoven fabric for mulching so that it may be comprised by the nonwoven fabric of a transparent system is mentioned.

In addition, as a preferred example, a metal-based nonwoven fabric having a high ability to reflect and block light on at least one nonwoven fabric including an outermost layer on one side of the multilayer nonwoven fabric for mulching to form a layer which is directly or indirectly bonded thereto. It can be configured as. In this case the ability to reflect and block light will depend on the number of nonwoven fabrics of the metal-based layer that is laminated. In this case, the multi-layered nonwoven fabric for mulching does not necessarily have dichroism, and by the simple and simple method, very good reflection and blocking effect of sunlight can be achieved.

In another preferred embodiment, the outermost layer of one side of the multi-layered nonwoven fabric for mulching is composed of a transparent nonwoven fabric, and one or more nonwoven fabrics forming a layer bonded directly or indirectly to the nonwoven fabric of a metallic color system. It is mentioned to form a mirror-shaped reflective surface on one side of the multilayer nonwoven fabric for mulching. In such a configuration, even when the metallic nonwoven fabric is weak in durability, the transparent nonwoven fabric forming the outermost layer may achieve the required durability by protecting such nonwoven fabric.

In another example, a nonwoven fabric, including the outermost layer on one side of a multi-layered nonwoven fabric forming a layer which is directly or indirectly bonded thereto, has a white light reflecting or blocking ability, or a reflecting and blocking ability, When composed of a metallic or transparent nonwoven fabric, the multilayer for mulching such that the one or more nonwovens, including the outermost layer on the other side, that form a layer that is directly or indirectly bonded thereto, are composed of a black or metallic nonwoven fabric. Producing a nonwoven fabric is mentioned.

In the above-mentioned nonwoven fabric of white, metallic, or black system, a white, metallic, or black pigment is added to the spinning solution during spinning of the nonwoven fabric, or a white, metallic, or black dye is added to the manufactured nonwoven fabric. The thing manufactured by apply | coating can be used.

Examples of the white or metallic pigment include titanium dioxide (TiO ₂ ), silver, aluminum particles, synthetic pigments, and the like, and black pigments include carbon black or synthetic pigments and natural pigments.

In the method for producing a multi-layered nonwoven fabric for mulching of the present invention, the nanofiber nonwoven fabric is first manufactured by the same method as described above, and a nonwoven fabric and a roll calender (roll calender) selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric, Using embossed calender, swimming roll, other modified roll bonding, ultrasonic bonding, thermal bonding, infrared bonding, microwave Bonding may be performed by laminating using microwave bonding, radio-frequency bonding, water-jet bonding, or the like.

But in an easier and more economical way,

Positioning a spunbond nonwoven fabric or a meltblown nonwoven fabric to be combined with the nanofiber nonwoven fabric in advance on a position where the spinning solution for manufacturing the nanofiber nonwoven fabric is spun; And splicing the spunbond nonwoven fabric or the meltblown nonwoven fabric and the nanofiber nonwoven fabric by electrospinning the spinning solution on the spunbond nonwoven fabric or the meltblown nonwoven fabric.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 is a perspective view showing one embodiment of a multi-layered nonwoven fabric for mulching of the present invention.

Referring to Figure 1, it is preferable that the multi-layered nonwoven fabric for composite mulching according to the present invention is composed of a spunbond nonwoven fabric, a nanofiber nonwoven fabric, and a meltblown nonwoven fabric by various methods to have a structure of two to five layers. In the case of curtains in a general house, it is preferable to use two to three layers to reduce the weight load during operation of the switch, and to easily open and close the curtains. It is preferable to use three to five layers laminated to have a thermal insulation effect and breathability and humidity retention function. In addition, weed control, soil loss prevention, humidity control, fruit sweetness and the use for improving the commercial properties can be laminated in three layers.

The nanofiber nonwoven fabric included in the multi-layered nonwoven fabric for mulching of the present invention blocks the invasion of viruses, bacteria, micro-pollutants, insects, and the like from the outside, and serves to provide moisture retention and breathability. Nanofiber nonwovens have a large specific surface area to volume, effectively blocking the passage of viruses, bacteria, insects and micro-contaminants.

Figure 2 is a conceptual diagram showing an embodiment as a method of manufacturing a multi-layered nonwoven fabric for mulching of the present invention.

Referring to Figure 2, the multi-layered nonwoven fabric for mulching of the present invention is the first layer manufacturing step (P100), the second layer manufacturing step (P200), the third layer manufacturing step (P300), the fourth layer manufacturing step (P400) , The fifth layer manufacturing step (P500), and the combination step (P600) may be made, and the fifth layer manufacturing step in the first layer may be manufactured in any order. In addition, the multi-layer composite nonwoven fabric having passed through the step of mixing (P600) reaches a completion step (P800) through a post-treatment step (P700).

Referring to the step (P600) of the multi-layered nonwoven fabric for mulching having the above structure, the non-woven fabric of the 2 to 5 layers prepared according to the manufacturing step of the first layer (P100) to the fifth layer (P500) of FIG. Using roll calender bonding, embossed calender, swimming roll, other modified roll bonding, or by ultrasonic bonding, thermal bonding, infrared Bonding (P600) is performed by bonding using infrared bonding, microwave bonding, microwave-wave bonding, radio-frequency bonding, water-jet bonding, or the like.

When the post-treatment (P700) step of the multi-layered nonwoven fabric for mulching having the above structure is described, the post-treatment is performed using a method such as hydrophilization, hydrophobization, UV treatment, resin impregnation, dye treatment, etc. according to the purpose of the final use. .

Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following examples are provided to illustrate the present invention, and the present invention is not limited to the following examples and may be variously modified and changed.

Example

As a nonwoven fabric to be used for the first layer, a spunbond nonwoven fabric (spunbond PP long fiber nonwoven fabric for agriculture, manufactured by Samyang Co., Ltd.) was prepared. Nylon 66 was dissolved in acetic acid (HCOOH, formic acid) in a weight ratio of 2: 8 to prepare nanofiber nonwoven fabric as the nonwoven fabric to be used for the second layer, and then the phytoncite solution and UV stabilizer 100 wt. The spinning solution was prepared by mixing 20 parts by weight and 1 part by weight based on each part. Connect the spinning solution to the spinneret, adjust the applied voltage 50 kV, the distance between the spinneret and the current collector to 30 cm, then fix the spunbonded nonwoven fabric for the first layer on the conveyor belt and discharge at 0.1 to 1 cc / g per hole. Electrospinning was carried out while spinning the nanofiber nonwoven layer to 30 gsm to the spunbond nonwoven layer. The fiber diameter of the spun nylon 66 nanofibers was 200 nm. The spunbond nonwoven fabric (spunbond PP long-fiber nonwoven fabric, manufactured by Samyang Co., Ltd.), which is the third layer, was again laminated on the nanofiber nonwoven fabric of the first layer spunbond nonwoven fabric / second layer nanofiber nonwoven fabric laminate thus manufactured. After having the same laminated structure as in (c) of Figure 2 (P600) was stepped using the embossed blender in step (P600). The composite composite nonwoven fabric was coated with silicon in the step (P700) of FIG. 2 to prepare a multi-layered nonwoven fabric for mulching.

1 is a perspective view showing one embodiment of a multi-layered nonwoven fabric for mulching of the present invention.

Figure 2 is a conceptual diagram showing an embodiment as a method of manufacturing a multi-layered nonwoven fabric for mulching of the present invention.

Claims (14)

A multi-layered nonwoven fabric for mulching comprising at least one nonwoven fabric selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric and at least one nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm in a laminated form. The multi-layered nonwoven fabric of claim 1, wherein the nanofiber nonwoven fabric is laminated in an amount of 1 gsm to 100 gsm based on the multi-layered nonwoven fabric for mulching. The multilayer nonwoven fabric for mulching according to claim 1, wherein the spunbond nonwoven fabric or the meltblown nonwoven fabric and the nanofiber nonwoven fabric are laminated in two layers. The method of claim 1, wherein the multi-layered nonwoven fabric for mulching includes a form in which at least one nonwoven fabric selected from a spunbond nonwoven fabric and a meltblown nonwoven fabric and one nanofiber nonwoven fabric having a fiber diameter of 10 nm to 1 μm are laminated in three or more layers. , The nanofiber nonwoven fabric is a multi-layered nonwoven fabric, characterized in that formed on the layer except the outermost layer. The method of claim 1, wherein the multi-layered nonwoven fabric for mulching comprises a three-layer laminate in which the spunbond nonwoven fabric, the meltblown nonwoven fabric and the nanofiber nonwoven fabric are sequentially laminated, among the spunbond nonwoven fabric and meltblown nonwoven fabric Multi-layered nonwoven fabric for mulching, characterized in that one or two selected nonwoven fabrics are laminated on the nanofiber nonwoven fabric. The multilayer nonwoven fabric for mulching according to claim 1, wherein the spunbond nonwoven fabric has a fiber diameter of 10 µm to 30 µm and the meltblown nonwoven fabric has a fiber diameter of 3 µm to 20 µm. The method according to any one of claims 1 to 6, wherein the nanofiber nonwoven fabric is prepared by electrospinning, nanosilver, titanium dioxide (TiO ₂ ), functional natural extracts, synthetic antimicrobial agents, pigments, dyes and ultraviolet stabilizers Multi-layered nonwoven fabric for mulching, characterized in that it further comprises at least one component selected from the group consisting of. The multi-layered nonwoven fabric for mulching according to claim 7, wherein the functional natural extract is at least one selected from cinnamon extract, bark extract and phytoncite. The nonwoven fabric of claim 1, wherein the one or more nonwoven fabrics, including the outermost layer on one side of the mulching multilayer nonwoven fabric, form a layer that is directly or indirectly bonded therewith, the ability to reflect or block light, Or a multi-layered nonwoven fabric for mulching, characterized in that the non-woven fabric of white, metallic, or transparent system having a reflection and blocking ability. 10. The method of claim 9, wherein the at least one nonwoven fabric including the outermost layer on one side of the multi-layered nonwoven fabric to form a layer bonded directly or indirectly thereto is a metallic non-woven fabric having a reflection and blocking ability of light. Multilayered nonwoven fabric for mulching characterized in that. 10. The method of claim 9, wherein the outermost layer on one side of the multi-layered nonwoven fabric is a transparent nonwoven fabric, and at least one nonwoven fabric that forms a layer that is directly or indirectly bonded to the outermost layer has the ability to reflect and block light. A multi-layered nonwoven fabric for mulching, which is formed of a metal-based nonwoven fabric and forms a mirror-shaped reflective surface on one side of the multi-layered nonwoven fabric for mulching. 10. The method of claim 9, wherein the one or more nonwovens comprising a layer on one side of the multilayer nonwoven for mulching to form a layer that is directly or indirectly bonded thereto have a reflective or blocking ability of light, or a reflective and blocking ability. One or more nonwovens that are white, metallic, or transparent nonwoven fabrics, including the outermost layer on the other side and that form a layer that is directly or indirectly bonded thereto, are black or metallic nonwoven fabrics that have light blocking capability. Multilayered nonwoven fabric for mulching, characterized in that. Positioning a spunbond nonwoven fabric or a meltblown nonwoven fabric to be combined with the nanofiber nonwoven fabric in advance on a position where the spinning solution for manufacturing the nanofiber nonwoven fabric is spun; And The mulching according to any one of claims 1 to 6, wherein the spunbond nonwoven fabric or the meltblown nonwoven fabric is electrospun on the spunbonded nonwoven fabric or the meltblown nonwoven fabric to combine the spunbond nonwoven fabric or the meltblown nonwoven fabric with the nanofiber nonwoven fabric. Method for producing a multilayer nonwoven fabric for use. The selected nonwovens are fabricated using a machine selected from the group consisting of roll calenders, embossed calenders, swimming rolls, and modified roll bondings to produce multi-layer nonwoven fabrics for mulching. Ultrasonic Bonding, Thermal Bonding, Thermal Bonding, Infrared Bonding, Microwave Bonding, Radio-Frequency Bonding, and Water-Jet Bonding A method for producing a multi-layered nonwoven fabric for mulching according to any one of claims 1 to 6, characterized in that it is laminated using a method selected from the group consisting of:

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