KR20210125906A - Non-woven fabric composite and article including the non-woven fabric composite - Google Patents

Abstract

Disclosed are a composite non-woven fabric and an article that can be used as a nonwoven fabric for various uses. The disclosed composite nonwoven fabric comprises a first spunbond nonwoven layer, a meltblown nonwoven layer, and a second spunbond nonwoven layer, where at least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer comprises a nonwoven insect repellent masterbatch, and the melt blown nonwoven layer is at least partially charged. The nonwoven insect repellent masterbatch includes a base resin, an insect repellent component and a carrier material. In the nonwoven insect repellent masterbatch, the content of the insect repellent component is 300 to 500 ppm by weight, and the content of the carrier material is 30,000 to 50,000 ppm by weight.

Description

Non-woven fabric composite and article including the non-woven fabric composite

Composite nonwovens and articles are disclosed. More specifically, by including insect repellents harmless to the human body, antibacterial properties can be improved along with insect repellent and proliferation inhibitory effects, so composite nonwoven fabrics and articles that can be used as nonwoven fabrics for various uses for hygiene, bedding and agriculture are disclosed.

The conventional nonwoven fabric had satisfactory mechanical strength and fine dust removal function, but had no functionality and antibacterial properties for insect repellent, so there was a problem of approaching pests during storage and irritating the skin when contaminated with bacteria.

One embodiment of the present invention provides a composite nonwoven fabric.

Another embodiment of the present invention provides an article comprising the composite nonwoven fabric.

One aspect of the present invention is

A first spunbond nonwoven fabric layer, a melt blown nonwoven fabric layer and a second spunbond nonwoven fabric layer,

At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer comprises a nonwoven insect repellent masterbatch,

The melt blown nonwoven layer is at least partially charged,

The insect repellent masterbatch for nonwoven fabric includes a base resin, an insect repellent component and a carrier material, and the content of the insect repellent component in the insect repellent masterbatch for nonwoven fabric is 300 to 500 ppm by weight, and the content of the carrier material is 30,000 by weight -50,000 ppm composite nonwoven fabric is provided.

The base resin may include a non-conductive polymer selected from polyolefin, polystyrene, polycarbonate, polyester, polyamide, a copolymer thereof, or a combination thereof.

The insect repellent component may include cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof.

The carrier material may include silica, zeolite, kaolin, or a combination thereof.

The nonwoven insect repellent masterbatch may have a dispersion index of 0.6 or more and less than 1.0.

The composite nonwoven fabric may include the first spunbonded nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in this order.

The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sublayers.

The melt blown nonwoven fabric layer may include an insect repellent.

The melt-blown non-woven fabric layer may further include at least one non-electrostatically-treated melt-blown non-woven fabric sub-layer in addition to the at least one electrostatically treated melt-blown non-woven fabric sub-layer.

The composite nonwoven fabric may further include at least one additional layer.

At least one of the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may include the insect repellent masterbatch for the nonwoven fabric in a proportion of 5 to 20% by weight based on the total weight of each.

The composite nonwoven fabric may have a bacteriostatic activity value of 5.0 or more, and a bacteriostatic activity value of pneumococci, measured according to the bacteriostatic activity measurement method (JIS L 1902) of 5.0 or more.

The composite nonwoven fabric has an insect repellency rate of adult thieves mealworms of 60% or more when one week passes after treatment, and can exhibit sustained performance of 40% or more even after two weeks after treatment.

The composite nonwoven fabric may have a skin patch test grade of grade 1 or higher.

The composite nonwoven fabric may have a color difference (ΔE ^* ) of 2.0 to 3.0.

The composite nonwoven fabric may exhibit air permeability performance of ^{300 to 700 cm 3} /cm ^{2 /s.}

The composite nonwoven fabric has a maximum breaking strength of 40 to 60N/5cm, wherein the breaking elongation is 40 to 80%, and the abrasion fluff evaluation grade may be first or second grade.

Another aspect of the present invention is

An article comprising the composite nonwoven fabric is provided.

The article may be a health or medical article.

The insect repellent masterbatch for nonwoven fabric manufactured according to the method for manufacturing the insect repellent masterbatch for nonwoven fabric according to an embodiment of the present invention contains insect repellent harmless to the human body, so that the insect repellent and antibacterial effect can be improved as well as the antibacterial properties for hygiene, It can be applied to nonwoven fabrics for various uses for bedding and agriculture.

1 is a view schematically showing a composite nonwoven fabric according to an embodiment of the present invention.
2 is a view schematically showing an apparatus for manufacturing a composite nonwoven used to continuously manufacture a composite nonwoven according to an embodiment of the present invention.

Hereinafter, a composite nonwoven fabric according to an embodiment of the present invention will be described in detail.

As used herein, the term "liquid insect repellent" refers to an insect repellent in a solution, oil or suspension state.

In addition, in the present specification, the term "dispersion index" refers to a value obtained by dividing the discharge amount by the input amount when the masterbatch of the insect repellent for nonwoven fabric is spun through the spinning nozzle.

In addition, in the present specification, "non-woven fabric composite" is not a non-woven fabric laminate manufactured through a separate laminating (lamination) post-process after two or more kinds of non-woven fabrics are individually prepared, but two or more kinds of non-woven fabrics are one It refers to a nonwoven fabric that is manufactured in a continuous process in each of the devices and is integrated. Therefore, in this specification, "composite non-woven fabric" may also be referred to as "monolithic non-woven fabric". The composite nonwoven fabric has a strong interlayer bonding and excellent morphological stability and filtration performance compared to the nonwoven fabric laminate.

Also, in the present specification, the "electrostatically treated melt blown nonwoven fabric layer" or "electrostatically treated melt blown nonwoven fabric sub layer" may be manufactured by a continuous process. Specifically, the "electrostatically-treated melt-blown non-woven fabric layer" or "pre-charged melt-blown non-woven fabric sub-layer" is manufactured by sequentially or simultaneously performing "preparation of melt-blown non-woven fabric" and "electro-treatment" in a continuous process. it may have been

Also, in the present specification, "charged" means a state in which electric charges are semi-permanently applied to the non-woven fabric fibers to form an electrostatic field between adjacent fibers, and the charged non-woven fabric has a charge compared to the non-electrostatically-treated non-woven fabric. It has high density and fine dust removal efficiency.

In addition, in this specification, "tensile strength" refers to a test piece with a width of 5 cm (grip interval of 10 cm during evaluation) with a tensile speed of 500 mm/min through a tensile strength elongator (Instron) according to KSK 0520. The tensile strength in the mechanical direction was measured, respectively.

In addition, in this specification, "strength" refers to 16 samples (25 mm × 150 mm) in MD and CD directions according to the measurement standard WSP 90.1, placed on the stiffness measuring machine, and when the specimen touches the inclined surface in the inclined direction. The length of the sample from the point of bending to the point of contact with the inclined surface was measured in mm.

In addition, in this specification, "fine dust permeability", "fine dust removal efficiency" and "pressure loss" were evaluated by the following method for the composite nonwoven fabric after production and before use:

(1) Measurement device: TSI-8130 model of TSI was used.

(2) Aerosol Formation: The measuring device evaporated the water of the sodium chloride aqueous solution mist generated by the fine aerosol generating device to form a sodium chloride aerosol dispersed in the air. The average particle diameter of sodium chloride particles in the formed sodium chloride aerosol is 0.3 μm, and the concentration of sodium chloride in the aerosol is 18.5 mg/m ³ .

(3) Evaluation of fine dust permeability: The permeation surface velocity of the aerosol was 16 cm/sec, and the evaluation area of the nonwoven fabric was 100 cm ² . The transmittance of the aerosol particles was recorded as the fine dust transmittance.

(4) Evaluation of aerosol removal efficiency: The permeation surface velocity of the aerosol was 16 cm/sec, and the evaluation area of the nonwoven fabric was 100 cm ² . The aerosol removal efficiency was recorded as fine dust removal efficiency.

(5) Pressure loss evaluation: The permeation surface velocity of the aerosol was 16 cm/sec, and the evaluation area of the nonwoven fabric was 100 cm ² .

The composite nonwoven fabric according to an embodiment of the present invention includes a first spunbonded nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbonded nonwoven fabric layer.

At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer includes a masterbatch of insect repellent for nonwoven fabric.

The insect repellent masterbatch for nonwoven fabric includes a base resin, an insect repellent component and a carrier material, and the content of the insect repellent component in the insect repellent masterbatch for nonwoven fabric is 300 to 500 ppm by weight, and the content of the carrier material is 30,000 by weight ~50,000 ppm. When the content of the insect repellent component and the content of the carrier material are within the above ranges, respectively, both the insect repellent performance and the dispersion index of the insect repellent masterbatch for nonwovens may be excellent. If at least one of the content of the insect repellent component and the content of the carrier material is out of the above ranges, respectively, at least one of the insect repellent performance and the dispersion index of the insect repellent masterbatch for the nonwoven fabric may be inferior.

Hereinafter, a method of manufacturing the insect repellent masterbatch for nonwoven fabric according to an embodiment of the present invention will be described in detail.

The method for manufacturing a masterbatch for insect repellent for nonwoven fabric according to an embodiment of the present invention includes a step (S10) of obtaining a raw material mixture by mixing raw materials including a base resin, a liquid insect repellent and a carrier material.

The content of the liquid insect repellent in the raw material is 9,000 to 11,000 ppm by weight, and the content of the carrier material in the raw material is 30,000 to 50,000 ppm by weight.

If the content of the liquid insect repellent and the content of the carrier material are within the above ranges, respectively, it is possible to obtain an insect repellent masterbatch for a nonwoven fabric having excellent insect repellency performance and dispersion index. If at least one of the content of the liquid insect repellent and the content of the carrier material is out of the above ranges, respectively, an insect repellent masterbatch for a nonwoven fabric having inferior at least one of insect repellent performance and dispersion index can be obtained.

The base resin may include a non-conductive polymer selected from polyolefin, polystyrene, polycarbonate, polyester, polyamide, a copolymer thereof, or a combination thereof.

The polyolefin may include polyethylene, polypropylene, poly-4-methyl-1-pentene, polyvinyl chloride, or a combination thereof.

The polyester may include polyethylene terephthalate, polylactic acid, or a combination thereof.

The liquid repellent may be a natural repellent extracted from plants. For example, the liquid insect repellent may have a solid content of 3 to 5% by weight.

The liquid insect repellent may include cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof. Therefore, in the insect repellent masterbatch for nonwoven fabric, the insect repellent component may also include cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof.

The carrier material may increase the dispersion index of the insect repellent masterbatch for nonwoven fabric while performing a crosslinking role between the liquid insect repellent and the base resin.

In addition, the carrier material may include silica, zeolite, kaolin, or a combination thereof.

In addition, the method of manufacturing the insect repellent masterbatch for nonwoven fabric may further include the step (S20) of extruding the raw material mixture into pellets after the step (S10).

The repellent component may be a residue of the liquid repellent described above. Accordingly, the insect repellent component may include cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof.

In addition, the nonwoven insect repellent masterbatch may have a dispersion index of 0.6 or more and less than 1.0. If the dispersion index of the nonwoven insect repellent masterbatch is less than 0.6, when the nonwoven fabric is attempted to be manufactured by adding the nonwoven insect repellent masterbatch, spinning becomes impossible due to an increase in extruder and die pressure. it becomes impossible In addition, if the nonwoven insect repellent masterbatch does not contain the carrier material, its dispersion index becomes 1.0, and when it contains even a little, its dispersion index becomes less than 1.0.

The composite nonwoven fabric has insect repellent and antibacterial functions.

The composite non-woven fabric may include a first spun-bonded non-woven fabric layer, a melt-blown non-woven fabric layer, and a second spun-bonded non-woven fabric layer. Specifically, the composite nonwoven fabric may include a first spunbonded nonwoven fabric layer, a melt blown nonwoven fabric layer and a second spunbonded nonwoven fabric layer that are each manufactured in a continuous process in one device and integrated with each other.

At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer may include the insect repellent masterbatch for the nonwoven fabric.

The melt blown nonwoven fabric layer may be at least partially charged.

In addition, the melt blown nonwoven fabric layer may include an insect repellent. For example, the melt blown nonwoven fabric layer may include a masterbatch of insect repellent for the nonwoven fabric.

The composite nonwoven fabric comprises at least a partially charged melt blown nonwoven fabric layer, characterized in that it has a fine particle collecting function. However, since the conventional spunbond-meltblown multilayer nonwoven fabric has an average pore size of several to several tens of micrometers (㎛), there is little function of removing fine particles of 0.1 to 0.6㎛ level.

In addition, the composite nonwoven fabric has a QF factor of 0.15 to 0.90 represented by the following Equation 1:

[Equation 1]

QF factor = -ln (fine dust permeability/pressure loss)

In the above formula, the symbol "ln" means the natural logarithm.

For example, the QF factor may be 0.20 to 0.90, 0.25 to 0.90, 0.30 to 0.90, 0.35 to 0.90, 0.40 to 0.90, 0.50 to 0.90, 0.60 to 0.90, 0.70 to 0.90, or 0.8 to 0.90.

The higher the QF factor, the higher the filtration performance.

The composite nonwoven fabric may have a tensile strength of 0.1 to 0.3 kgf / 5 cm / gsm, 0.15 to 0.3 kgf / 5 cm / gsm, 0.20 to 0.3 kgf / 5 cm / gsm, or 0.25 to 0.30 kgf / 5 cm / gsm in the MD direction. Here, gsm is ^{an abbreviation of g/m 2} , which means the weight per unit area of the composite nonwoven fabric.

In addition, the composite nonwoven fabric may have a stiffness in the MD direction of 20 mm or more, 25 mm or more, 30 mm or more, or 35 mm or more.

In addition, the composite nonwoven fabric may have a stiffness of 10 mm or more, 15 mm or more, 20 mm or more, 25 mm or more, or 30 mm or more in the CD direction.

In addition, the composite nonwoven fabric has a fine dust removal efficiency of 20 to 99.9%, 30 to 99.9%, 40 to 99.9%, 50 to 99.9%, 60 to 99.9%, 70 to 99.9%, 80 to 99.9%, or 90 to 99.9% can be

In addition, the composite nonwoven fabric has a pressure loss of 0.80-12mmH ₂ O, 1.0-10mmH ₂ O, 1.5-8mmH ₂ O, 2.0-6mmH ₂ O, 2.5-7mmH ₂ O, 3.0-6mmH ₂ O, 3.5-5mmH ₂ O Or 4.0-5mmH ₂ O may be.

The composite nonwoven fabric may include the first spunbonded nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in this order. However, the present invention is not limited thereto, and the composite nonwoven fabric may include the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in a different order.

The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sublayers. Specifically, the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may each include a plurality of spunbond nonwoven fabric sub-layers that are each manufactured in a continuous process in one device and integrated with each other.

The melt-blown non-woven fabric layer may include at least one pre-treated melt-blown non-woven sub-layer. Specifically, the melt-blown non-woven fabric layer includes only one electrostatically treated melt-blown non-woven fabric sub-layer, or a plurality of electro-treated melt-blown non-woven non-woven sub-layers each manufactured in a continuous process in one device and integrated with each other. may include.

The melt-blown non-woven fabric layer may further include at least one non-electrostatically-treated melt-blown non-woven fabric sub-layer in addition to the at least one electrostatically treated melt-blown non-woven fabric sub-layer. Specifically, the melt-blown non-woven fabric layer includes at least one uncharged melt-blown non-woven fabric sub-layer in addition to at least one pre-charged melt-blown non-woven fabric sub-layer, or each of the melt-blown non-woven fabric sub-layers in one device is manufactured in a continuous process. It may further include a plurality of non-electrostatically treated meltblown nonwoven sub-layers integrated with each other.

At least one spunbond nonwoven fabric, at least one electrostatically treated meltblown nonwoven fabric and/or at least one uncharged meltblown nonwoven fabric included in the composite nonwoven fabric may each independently comprise a non-conductive polymer. .

The non-conductive polymer may be the same as the non-conductive polymer included in the base resin of the insect repellent masterbatch for nonwoven fabric.

Each of the spunbond nonwoven fabrics, each of the electrostatically treated meltblown nonwoven fabrics and/or each of the uncharged meltblown nonwoven fabrics may each independently include an additive.

The additives include pigments, light stabilizers, primary antioxidants, secondary antioxidants, metal deactivators, hindered amines, hindered phenols, fatty acid metal salts, triester phosphites, phosphates, fluorine-containing compounds, nucleants or these may include a combination of

Also, in one embodiment, the antioxidant may function as a charge enhancer. Possible charge enhancers include thermally stable organic triazine compounds, oligomers or combinations thereof, which compounds or oligomers further contain at least one nitrogen atom in addition to the nitrogen in the triazine ring.

For example, charge increasing agents for improving charging characteristics are disclosed in US Patent Nos. 6,268,495, 5,976,208, 5,968,635, 5,919,847, and 5,908,598. For example, the charge increasing agent may include a hindered amine-based additive, a triazine additive, or a combination thereof.

As another example, the charge increasing agent is poly[((6-(1,1,3,3,-tetramethylbutyl)imino-1,3,5-triazine-2,4-diyl)((2 ,2,6,6,-tetramethyl-4-piperidyl)imino)hexamethylene ((2,2,6,6,-tetramethyl-4-piperidyl)imino)] (manufactured by BASF, CHIMASSORB 944), 1,6-hexanediamine with (2,4,6-trichloro-1,3,5-triazine, N,N'-bis(2,2,6,6-tetramethyl-4- piperidinyl)-polymer, reaction product with N-butyl-1-butanamine, N-butyl-2,2,6,6-tetramethyl-4-piperidinamine (manufactured by BASF, CHIMASSORB 2020) or combinations thereof may be included.

The charge increasing agent is an N-substituted amino aromatic compound, in particular a tri-amino substituted compound such as 2,4,6-trianilino-p-(carbo-2′-ethylhexyl-1′-oxy)- 1,3,5-triazine (manufactured by BASF, UVINUL T-150) may be used. Another charge enhancer is 2,4,6-tris-(octadecylamino)-triazine, also known as tristearyl melamine (“TSM”).

The content of the charge increasing agent may be 0.25 to 5 parts by weight based on 100 parts by weight of the total weight of each electrostatically treated melt blown nonwoven fabric. If the content of the charge increasing agent is within the above range, it is possible to obtain a high level of charging performance targeted by the present invention, as well as good spinnability, high strength of the nonwoven fabric, and advantageous in terms of cost.

The composite nonwoven fabric may further include generally known additives such as a heat stabilizer and a weathering agent in addition to the additives.

The total content of the electrostatically treated melt blown nonwoven fabric in the composite nonwoven fabric may be 3 to 50 parts by weight based on 100 parts by weight of the total weight of the composite nonwoven fabric. When the total content of the electrostatically treated melt blown nonwoven fabric is within the above range, a composite nonwoven fabric having excellent filtration performance, shape stability and durability may be obtained.

The composite nonwoven fabric may have a basis weight (mass per unit area) of 10 to 500 g/m ² , for example, 20 to 100 g/m ² .

A plurality of nonwoven fabrics included in the composite nonwoven fabric may be integrated (ie, bonded) to each other by thermal fusion rather than ultrasonic fusion.

The composite nonwoven fabric may further include at least one additional layer.

As an example, each of the additional layers may include at least one separate nonwoven fabric that is neither a spunbond nonwoven fabric nor a meltblown nonwoven fabric.

As another example, each of the additional layers may include one or more layers made of a material other than the non-woven fabric.

At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer contains the insect repellent masterbatch for the nonwoven at a ratio of 5 to 20% by weight based on the total weight of each. If the content of the insect repellent masterbatch for the nonwoven fabric in each of the nonwoven fabrics is within the above range, the radioactivity, insect repellent effect, skin patch test grade, air permeability performance, mechanical strength, and abrasion fluff evaluation grade are all excellent, and the color difference system deviation (ΔE*) A nonwoven fabric having an appropriate level can be obtained.

In addition, the composite nonwoven fabric may have a bacteriostatic activity value of 5.0 or more, and a bacteriostatic activity value of pneumococci, measured according to the bacteriostatic activity value measurement method (JIS L 1902) of 5.0 or more.

In addition, the composite nonwoven fabric has an insect repellency rate of adult thieves mealworms of 60% or more when one week passes after treatment, and can exhibit sustained performance of 40% or more even after two weeks after treatment.

In addition, the composite nonwoven fabric may have a skin patch test grade of grade 1 or higher.

In addition, the composite nonwoven fabric may have a color difference (ΔE*) of 2.0 to 3.0. The color-difference deviation (ΔE*) has effectiveness in terms of quality control. Specifically, qualitative and quantitative analysis can be performed to confirm whether the insect repellent content is appropriate, but this is time-consuming but inefficient in cost, which can be simply solved by measuring the color difference meter deviation (ΔE*). That is, if the color difference (ΔE*) of the composite nonwoven fabric is 2.0 to 3.0, it is evidence that the insect repellent content is appropriate. In addition, when the color difference (ΔE*) of the composite nonwoven fabric is 2.0 to 3.0, it is slightly brownish, and the color difference (ΔE*) of organic cotton and natural pulp is 2.0 level, giving consumers an organic feeling. There are also advantages to appeal.

In addition, the composite nonwoven fabric may exhibit air permeability performance of ^{300 to 700 cm 3} /cm ^{2 /s.}

The composite nonwoven fabric has a maximum breaking strength of 40 to 60N/5cm, wherein the breaking elongation is 40 to 80%, and the abrasion fluff evaluation grade may be first or second grade.

Hereinafter, a method for manufacturing a composite nonwoven fabric according to an embodiment of the present invention will be described in detail.

The method for manufacturing a composite nonwoven fabric according to an embodiment of the present invention includes the steps of continuously forming a spunbonded nonwoven layer (S100) and continuously forming a meltblown nonwoven layer on the spunbonded nonwoven layer (S200) do.

The continuous forming step (S100) of the spunbond non-woven fabric layer is performed by melt-extruding, cooling and stretching a mixture of a thermoplastic non-conductive polymer and the above-described insect repellent masterbatch for non-woven fabric to form a fiber yarn, and then apply the fiber yarn onto a screen belt. It may be stacked to form a web (web forming).

The continuous forming step (S200) of the melt-blown non-woven fabric layer is performed by melt-extruding, hot-air stretching and cooling a thermoplastic non-conductive polymer (additional charging performance enhancer) to form a fiber yarn, and then forming the fiber yarn into the spunbond non-woven fabric layer. In the continuous forming step (S100), it may be laminated on the web-formed spunbond to form a web.

Specifically, the continuous forming step of the melt blown nonwoven layer (S200) is a step of continuously forming free fibers with a non-conductive polymer (or a combination of a non-conductive polymer and the above-described insect repellent masterbatch for non-woven fabric) (S200-1), Continuously spinning the free fibers (S200-2), continuously spraying a polar solvent (eg, water) onto the free fibers to continuously charge the free fibers (S200-3), and the It may include a step (S200-4) of continuously integrating free fibers to continuously form a melt blown nonwoven fabric.

The free fiber continuous charging treatment step (S200-3) may be performed by continuously spraying the polar solvent together with a gas (eg, air).

Hereinafter, it will be described in detail that the free fiber continuous charging treatment step (S200-3) has a heterogeneous or significant effect compared to the prior art.

(1) Generally, as a method for charging during the melt blown process, as in US Patent No. 6,375,886, charging is performed through friction between a polar solvent and a filament being melt-spinning, as in US Patent No. 6,969,484. The melt-blown non-woven fabric was immersed in a polar solvent and charged through friction between water and non-woven fabric while water permeated through the non-woven fabric with a suction device. . As described above, the charging treatment method using a polar solvent requires a separate post-process of drying the polar solvent after the charging treatment, and therefore it is fundamentally impossible to laminate or composite the nonwoven fabric in a continuous process. U.S. Patent No. 6,375,886 and U.S. Patent No. 6,969,484 are incorporated herein by reference in their entirety.

(2) U.S. Patent No. 5,227,172 discloses a method in which a high potential difference is applied between a melt blown die and a collector so that the melt-spun resin is filamentized and inductively charged by the surrounding electric field. However, in this method, a melt-blown nonwoven fabric that has been electrostatically treated can be obtained without a separate post-processing treatment. However, since the non-woven fabric that has been inductively charged by the potential difference has a phenomenon that the charging efficiency is rapidly reduced depending on heat or the surrounding environment, it requires long-term storage in the sales process, such as a mask for removing fine dust, or with an air purifier filter. It has a disadvantage that it is difficult to apply it to a purpose where a long service life is guaranteed. U.S. Patent No. 5,227,172 is incorporated herein by reference in its entirety.

The present inventors spray a polar solvent together with air on the melt-blown nonwoven fabric layer in the form of a two-fluid body, and friction the polar solvent particles with sufficient kinetic energy with a small injection amount to the filament being melt-spun to have a high-efficiency triboelectric effect. We developed a pretreatment device to do this, and this pretreatment device is characterized in that it does not require a separate drying facility because it is sufficiently heated and evaporated by the heated air within the DCD (Die to collector distance) section due to a small injection amount. Due to these features, the pretreatment device has a feature that can compound the nonwoven fabric by continuous lamination in combination with the nonwoven fabric manufacturing process.

The nonwoven fabric obtained by electrostatically treating the melt blown nonwoven fabric is continuously polarized so that negative and positive charges exist semi-permanently, and this nonwoven fabric is referred to as an electret nonwoven fabric.

As described above, the method for manufacturing the composite nonwoven may not include a separate drying step for removing the polar solvent sprayed in the free fiber continuous charging treatment step (S200-3).

In addition, as described above, the polar solvent continuously sprayed in the free fiber continuous charging treatment step (S200-3) is continuously heated by heated air within the DCD (Die to collector distance) section of the composite nonwoven fabric manufacturing apparatus. can be evaporated.

The manufacturing method of the composite nonwoven fabric may further include a step (S300) of continuously forming another spunbonded nonwoven fabric layer on the melt blown nonwoven fabric layer in the same manner as the continuous forming step (S100) of the spunbonded nonwoven fabric layer. .

The manufacturing method of the composite nonwoven fabric is the melt blown nonwoven fabric layer continuous forming step (S200) or the other spunbond nonwoven fabric layer continuous forming step (S300) on one side or both sides of the melt blown nonwoven fabric layer after each spunbond layer The step of continuously thermocompressing the nonwoven layer (S40) may be further included.

1 is a view schematically showing a composite nonwoven fabric 10 according to an embodiment of the present invention.

The composite nonwoven fabric 10 according to an embodiment of the present invention includes a first spunbonded nonwoven fabric layer 11 , a melt blown nonwoven fabric layer 12 , and a second spunbonded nonwoven fabric layer 13 .

In addition, by modifying the manufacturing method of the composite nonwoven fabric, a composite nonwoven fabric having various structures and/or configurations may be manufactured.

Another aspect of the present invention provides an article comprising the composite nonwoven fabric.

The article may be a health or medical article.

Hereinafter, the present invention will be described in more detail through examples. These examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4: Preparation of insect repellent masterbatch

A propylene homopolymer (LG Chem, H7700) with a melt index (MI) of 34 g/10 min is used as the base resin, and cinnamaldehyde, α-copaene, apiol and oleic acid are used as liquid insect repellents. An insect repellent masterbatch was prepared in a melt-kneading method using a mixture of 20:8:7:9 by weight and silica as a carrier material. In Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4, the content of the liquid insect repellent (by weight) and the content of the carrier material (by weight) in the raw material consisting of the base resin, the liquid insect repellent and the carrier material are shown in Table 1, respectively.

Example comparative example 1-1 1-2 1-3 1-1 1-2 1-3 1-4 Content of liquid insect repellent (ppm) 9,000 10,000 11,000 9,000 8,000 11,000 12,000 Carrier content (ppm) 30,000 40,000 50,000 20,000 30,000 60,000 50,000

In addition, the content of the insect repellent component (by weight) and the content of the carrier material (by weight) in the insect repellent master batches prepared in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4 are shown in Table 2 below. each is shown.

Example comparative example 1-1 1-2 1-3 1-1 1-2 1-3 1-4 Content of insect repellent component (ppm) 300 400 500 300 200 500 600 Carrier content (ppm) 30,000 40,000 50,000 20,000 30,000 60,000 50,000

Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-6: Preparation of composite nonwoven fabric

A propylene homopolymer (LG Chem, H7700) having a melt index (MI) of 34 g/10 min was used as the polymer for forming the spunbond non-woven fabric layer (SB), and melt flow was used as the polymer for forming the melt-blown non-woven fabric layer (MB). A resin (LG Chem, H7910) having an index (MFR) of 1000 g/10 min was used. In addition, in the polymer for forming the spunbond nonwoven fabric layer (SB), any one of the insect repellent masterbatches prepared in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4 based on the total weight thereof is shown below. It was added according to the proportions in Table 3. In addition, Chimassorb 944, a hindered amine light stabilizer, was added to the polymer for forming the melt blown nonwoven fabric layer (MB) in an amount of 0.5 wt%. Thereafter, a composite nonwoven fabric of a spunbond-meltblown-spunbond (SMS) type was continuously manufactured using an apparatus for manufacturing a composite nonwoven as shown in FIG. 1 . Specifically, the melt blown nonwoven fabric layer (MB) is continuously charged by contacting water with air through a two-fluid nozzle in the apparatus for manufacturing the composite nonwoven fabric, and then is laminated on top of the spunbond nonwoven fabric layer (SB), Another spunbond nonwoven fabric layer SB is laminated on top of the melt blown nonwoven fabric layer MB. As a result, an SMS nonwoven fabric laminate was obtained. Thereafter, the SMS nonwoven fabric laminate was manufactured in the form of a single composite nonwoven fabric through a thermocompression bonding process between a roll having an embossed pattern and a roll having no irregularities. Here, the total basis weight of the SMS composite nonwoven fabric ^{was adjusted to 100 gsm (g/m 2} ), and the basis weight of the melt blown nonwoven fabric layer (MB) was adjusted to 22 gsm.

Used Insect Repellent Masterbatch Example comparative example 2-1 2-2 2-3 2-1 2-2 2-3 2-4 2-5 2-6 Kinds Example 1-1 Example 1-2 Examples 1-3 Comparative Example 1-1 Comparative Example 1-2 Comparative Example 1-3 Comparative Example 1-4 Example 1-1 Examples 1-3 addition amount
(weight%) 20 13 5 20 20 5 5 25 One

Evaluation Example 1: Evaluation of dispersion index of insect repellent masterbatch

The dispersion index of the insect repellent masterbatch prepared in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4 was evaluated, and the results are shown in Table 4 below.

Example comparative example 1-1 1-2 1-3 1-1 1-2 1-3 1-4 dispersion index 0.80 0.90 0.95 0.50 0.95 0.40 0.45

Evaluation Example 2: Evaluation of the physical properties of the composite nonwoven fabric

The physical properties of the composite nonwoven fabric prepared in Examples 2-1 to 2-5 and Comparative Examples 2-1 to 2-6 were evaluated in the following manner, and the results are shown in Table 5 below.

(1) Spinning: Observe whether or not the nonwoven web breaks, and if it does not break, it is recorded as “good”.

(2) Bacteriostatic activity value: The bacteriostatic activity measurement method is to inoculate bacteria (ie, staphylococcus or pneumococci) (ie, allow the test sample to completely absorb the test bacterial solution) and incubate for 18 hours to determine the number of bacteria before and after culture. way to check The bacteriostatic activity value is measured in the following way: That is, when the number of bacteria after culturing of the unprocessed control is C and the number of bacteria after culturing the insect repellent treated product is B, the bacteriostatic activity value is calculated according to the following Equation 2 . Here, the unprocessed control and the processed product are the same as each other in that they have a configuration including three layers of the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in this order, and the unprocessed control group is On the other hand, the processed products are different from each other in that they are not treated with insect repellent treatment.

[Equation 2]

Bacterial activity value = Log(C/B)

(3) Insect repelling rate and lasting performance of adult mealworms: The insect repellency rate of adult mealworms is expressed as a percentage (%) of the number of living mealworms in processed products relative to the number of living mealworms in the unprocessed control group. It shows the repelling performance of the processed product. Here, the unprocessed control and the processed product are the same as each other in that they have a configuration including three layers of the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer, and the second spunbonded nonwoven fabric layer in this order, and the unprocessed control group is On the other hand, the processed products are different from each other in that they are not treated with insect repellent treatment. The insect repellency rate of the adult mealworms is measured in the following way: First, a medium for adult mealworms is put in the chalet (large) 1, the chalet (small) 1 is stacked in the center, and the unprocessed control group and the chalet (small) 1 are Keep bait for bait. After that, put the adult mealworm medium in chalet (large) 2, stack chalet (small) 2 in the center, and place insect repellent processed products and bait feed in chalet (small) 2. After that, put it in an airtight container, and after 24 hours, take out the chalet (cow) 1 and the chalet (cow) 2 and check the number of surviving mites, respectively. Finally, the insect repellency rate of adult thieves mealworm is calculated according to Equation 3 below.

[Equation 3]

Insect repelling rate of adult worms (%) = (number of thieves in chalet (small) 1 - number of thieves in chalet (small) 2) / number of thieves in chalet (small) 1 × 100

In Equation 3, the living worm means an adult worm that shows a response to a stimulus from the outside.

(3) Skin patch test grade: The skin test measurement method is as follows:

① Sample preparation: 5cm x 5cm size per sample

② Attach a sample between the wrist and elbow of a person and age it for 24hr

③ After 24hr, remove the sample and check the skin change

- Grade 1: Same as initial skin

- Grade 2: slight redness

- Grade 3: More than half flushing

- Grade 4: redness of all parts

(4) Colorimetric deviation (ΔE ^* ): The skin test measurement method is as follows: The colorimetric deviation (ΔE ^* ) of the composite nonwoven fabric was measured using a colorimeter ((CM3700D, Minolta).

(5) Air permeability performance: Using the FX3300 air permeability measuring instrument, the sample was installed in the measuring device according to the KSK 0507 method, and then the air permeability (air permeability) was measured under the measuring area and measuring pressure.

(6) Breaking strength and elongation at break: Using a tensile strength elongation (Instron) measuring equipment, a test piece with a width of 5 cm was pulled under the conditions of a gap between grips of 10 cm and a tensile rate of 500 mm/min according to the KSK 0520 method. and the elongation at break was measured.

(7) Abrasion fluff: Using the Martindale 404 measuring equipment, a 15 cm piece was rubbed several times using the KSK 0504 method to measure the fluff.

Example comparative example 2-1 2-2 2-3 2-1 2-2 2-3 2-4 2-5 2-6 radioactive Good Good Good radiation
impossible Good radiation
impossible radiation
impossible Good Good Staphylococcus aureus bacteriostatic activity 6.0 5.7 5.2 measurement
impossible 2.0 measurement
impossible measurement
impossible 1.5 2.0 The bacteriostatic activity of pneumococci 6.8 6.4 6.1 not measurable 1.5 measurement
impossible measurement
impossible 1.6 1.8 Insect repellency rate of adult thieves mealworms (when 1 week has elapsed after treatment) 75% 70% 65% not measurable 25% measurement
impossible measurement
impossible 20% 15% Insect repellency rate of adult thieves mealworms (when 2 weeks have elapsed after treatment) 55% 48% 42% not measurable 30% measurement
impossible measurement
impossible 25% 20% skin patch test grade 1st grade 1st grade 1st grade not measurable 1st grade measurement
impossible measurement
impossible 1st grade 1st grade Colorimetric deviation (ΔE ^* ) 2.8 2.4 2.2 not measurable 1.5 measurement
impossible measurement
impossible 3.5 1.5 Air permeability (cm ³ /cm ² /s) 350 420 410 not measurable 450 measurement
impossible measurement
impossible 430 450 Maximum breaking strength (N/5cm) 55 60 57 measurement
impossible 55 measurement
impossible measurement
impossible 62 60 Elongation at break (%) 50 55 53 measurement
impossible 60 measurement
impossible measurement
impossible 55 57 Abrasion Fluff Assessment 1st grade 1st grade 1st grade not measurable 1st grade measurement
impossible measurement
impossible 1st grade 1st grade

Referring to Table 5, the composite nonwoven fabric prepared in Examples 2-1 to 2-3 has excellent radioactivity, insect repellent effect, skin patch test grade, air permeability performance, mechanical strength and abrasion fluff evaluation grade, and color difference ( ΔE ^* ) was found to be at an appropriate level.

However, in Comparative Examples 2-1, 2-3, and 2-4, spinning itself was impossible, so that a nonwoven fabric could not be prepared.

In addition, the composite nonwoven fabrics prepared in Comparative Examples 2-2, 2-5 and 2-6 were found to have poor insect repellent effect. In particular, in the composite nonwoven fabric prepared in Comparative Examples 2-5, the color difference (ΔE ^* ) is out of an appropriate level, and thus an organic feeling cannot be appealed to consumers.

Although the present invention has been described with reference to the drawings and embodiments, it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: composite nonwoven fabric 11: first spunbond nonwoven fabric layer
12: melt blown nonwoven layer 13: second spunbond nonwoven layer

Claims (19)

A first spunbond nonwoven fabric layer, a melt blown nonwoven fabric layer and a second spunbonded nonwoven fabric layer,
At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer comprises a nonwoven insect repellent masterbatch,
The melt blown nonwoven layer is at least partially charged,
The insect repellent masterbatch for nonwoven fabric includes a base resin, an insect repellent component and a carrier material, and the content of the insect repellent component in the insect repellent masterbatch for nonwoven fabric is 300 to 500 ppm by weight, and the content of the carrier material is 30,000 by weight ~50,000 ppm composite nonwoven. According to claim 1,
The base resin is a composite nonwoven fabric comprising a non-conductive polymer selected from polyolefin, polystyrene, polycarbonate, polyester, polyamide, a copolymer thereof, or a combination thereof. According to claim 1,
The insect repellent component is a composite nonwoven fabric comprising cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof. According to claim 1,
wherein the carrier material comprises silica, zeolite, kaolin, or a combination thereof. According to claim 1,
The nonwoven insect repellent masterbatch is a composite nonwoven fabric having a dispersion index of 0.6 or more and less than 1.0. According to claim 1,
The composite nonwoven fabric comprises the first spunbond nonwoven fabric layer, the melt blown nonwoven fabric layer and the second spunbonded nonwoven fabric layer in this order. 7. The method of claim 6,
The first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer each include a plurality of spunbond nonwoven fabric sublayers. According to claim 1,
The melt blown nonwoven fabric layer is a composite nonwoven fabric comprising an insect repellent. According to claim 1,
The meltblown nonwoven fabric layer further comprises at least one uncharged meltblown nonwoven sublayer in addition to the at least one charged meltblown nonwoven sublayer. According to claim 1,
A composite nonwoven further comprising at least one additional layer. According to claim 1,
At least one of the first spunbond nonwoven layer and the second spunbond nonwoven layer is a composite nonwoven fabric comprising the insect repellent masterbatch for the nonwoven fabric in a proportion of 5 to 20% by weight based on the total weight of each. According to claim 1,
The composite nonwoven fabric is a composite nonwoven fabric having a bacteriostatic activity value of 5.0 or more and a bacteriostatic activity value of pneumococci of 6.0 or more, measured according to the bacteriostatic activity measurement method (JIS L 1902). According to claim 1,
The composite nonwoven fabric exhibits a continuous performance of 40% or more even when the insect repellency rate of adult thieves mealworms is 60% or more when 1 week passes after treatment, and 2 weeks after treatment. According to claim 1,
The composite nonwoven fabric is a composite nonwoven fabric having a skin patch test grade of Grade 1 or higher. According to claim 1,
The composite nonwoven fabric has a color difference (ΔE ^* ) of 2.0 to 3.0. According to claim 1,
The composite nonwoven fabric is a composite nonwoven fabric expressing air permeability performance of ^{300-700 cm 3} /cm ^{2 /s.} According to claim 1,
The composite nonwoven fabric has a maximum breaking strength of 40 to 60N/5cm, wherein the breaking elongation is 40 to 80%, and the abrasion fluff evaluation grade is a first grade or a second grade composite nonwoven fabric. 18. An article comprising the composite nonwoven according to any one of claims 1-17. 19. The method of claim 18,
The article is an article for health or medical use.

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