KR102564030B1 - Method of preparing insect repellent materbatch for non-woven fabric, insect repellent materbatch for non-woven fabric made according to the method, non-woven fabric including the materbatch, and article including the non-woven fabric - Google Patents

Abstract

A method for manufacturing an insect repellent masterbatch for nonwoven fabric, an insect repellent masterbatch for nonwoven fabric, a nonwoven fabric, and an article are disclosed. The method for producing the disclosed insect repellent masterbatch for nonwoven fabric includes the step of obtaining a raw material mixture by mixing raw materials including a base resin, a liquid insect repellent and a carrier material, and the content of the liquid insect repellent in the raw materials is 9,000 to 11,000 ppm based on weight And, the content of the carrier material in the raw material is 30,000 ~ 50,000ppm based on weight.

Description

Method of preparing insect repellent materbatch for non-woven fabric, insect repellent materbatch for non-woven fabric made according to the method, non-woven fabric including the materbatch, and article including the non-woven fabric}

A method for manufacturing an insect repellent masterbatch for nonwoven fabric, an insect repellent masterbatch for nonwoven fabric, a nonwoven fabric, and an article are disclosed. More specifically, by including an insect repellent harmless to the human body, antibacterial properties can be improved along with insect repellent and proliferation inhibitory effects, which can produce non-woven fabrics for various purposes such as hygiene, bedding and agriculture Manufacturing of insect repellent masterbatch for non-woven fabrics Methods, insect repellent masterbatches for nonwoven fabrics, nonwoven fabrics and articles are disclosed.

Conventional non-woven fabrics have satisfactory mechanical strength and fine dust removal function, but do not have insect repellent functionality and antibacterial properties, so there is a problem of pest access during storage and irritation of the skin when contaminated with bacteria.

One embodiment of the present invention provides a method for producing an insect repellent masterbatch for nonwoven fabric.

Another embodiment of the present invention provides an insect repellent masterbatch for nonwoven fabrics prepared according to the method for preparing the insect repellent masterbatch for nonwoven fabrics.

Another embodiment of the present invention provides a nonwoven fabric comprising the insect repellent masterbatch for the nonwoven fabric.

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

One aspect of the present invention,

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,

Among the raw materials, the content of the carrier material is 30,000 to 50,000 ppm by weight, which provides a method for manufacturing an insect repellent masterbatch for nonwoven fabric.

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

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

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

Another aspect of the present invention is

Provides an insect repellent master batch for non-woven fabrics prepared according to the manufacturing method of the insect repellent master batch for non-woven fabrics.

Another aspect of the present invention is

Including a base resin, an insect repellent component and a carrier material,

The content of the insect repellent component is 300 to 500 ppm by weight,

The content of the carrier material provides an insect repellent masterbatch for nonwoven fabric of 30,000 to 50,000 ppm by weight.

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

Another aspect of the present invention is

It provides a nonwoven fabric comprising the insect repellent masterbatch for the nonwoven fabric.

The nonwoven fabric may include the insect repellent masterbatch for the nonwoven fabric in an amount of 5 to 20% by weight based on its total weight.

The non-woven fabric may have a bacteriostatic activity value of 5.0 or more for Staphylococcus aureus and a bacteriostatic activity value for Streptococcus pneumoniae of 6.0 or more, measured according to a bacteriostatic activity value measurement method (JIS L 1902).

The non-woven fabric has an insect repellent rate of thief larvae of 60% or more after 1 week of treatment, and can exhibit continuous performance of 40% or more even after 2 weeks of treatment.

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

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

Air permeability of the nonwoven fabric of 300 to 700 cm ³ /cm ² /s can be expressed.

Another aspect of the present invention is

An article comprising the nonwoven fabric is provided.

The article may be a health or medical article.

Insect repellent masterbatch for nonwoven fabric prepared according to the method for manufacturing an insect repellent masterbatch for nonwoven fabric according to an embodiment of the present invention contains an insect repellent harmless to the human body, so that antibacterial properties can be improved along with insect repellent and proliferation inhibitory effects, for hygiene, It can be applied to non-woven fabrics for various purposes such as bedding and agriculture.

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

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

In this specification, “liquid insect repellent” means an insect repellent in a solution, oil or suspension state.

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

In addition, in the present specification, "non-woven fabric composite" is not a non-woven fabric laminate prepared by separately manufacturing two or more types of non-woven fabrics and then going through a separate laminating (lamination) post-process, but two or more types of non-woven fabrics in one It means a non-woven fabric that is manufactured and integrated in a continuous process in the device of each. Accordingly, in this specification, "composite non-woven fabric" may also be referred to as "monolithic non-woven fabric". The composite nonwoven fabric is characterized by strong interlayer bonding and superior shape stability and filtration performance compared to the nonwoven fabric laminate.

Also, in the present specification, the “charged meltblown nonwoven fabric layer” or the “charged meltblown nonwoven fabric sublayer” may be manufactured by a continuous process. Specifically, the "charged meltblown nonwoven fabric layer" or the "charged meltblown nonwoven fabric sublayer" is produced by sequentially or simultaneously performing "meltblown nonwoven fabric production" and "electrification treatment" in a continuous process. may have been

In addition, in the present specification, "charged" means a state in which an electric charge is semi-permanently imparted to the nonwoven fabric fibers to form an electrostatic field between adjacent fibers, and the nonwoven fabric treated with charge has a higher electric charge than the nonwoven fabric that has not been treated with electricity. It has high density and fine dust removal efficiency.

In addition, in this specification, "tensile strength" refers to MD by stretching a test piece with a width of 5 cm (grip interval 10 cm during evaluation) under the condition of a tensile speed of 500 mm / min in accordance with KSK 0520 through a tensile strength machine (Instron). Tensile strength in each mechanical direction was measured.

In addition, in this specification, "stiffness" refers to taking 16 samples (25mm × 150mm) in the MD and CD directions in accordance with the measurement standard WSP 90.1, placing the samples on a stiffness meter, and when the specimen touches the inclined surface in the direction of the inclined plane It was measured in mm as a method of measuring the length of the sample from the point of bending to the point of contact with the inclined surface.

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

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

(2) Formation of aerosol: The measuring device evaporated water in the aqueous sodium chloride mist generated from the fine aerosol generating device to form sodium chloride aerosol dispersed in the air. The average particle diameter of the 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 transmittance: 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 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) Evaluation of pressure loss: The permeation surface velocity of the aerosol was 16 cm/sec, and the evaluation area of the nonwoven fabric was 100 cm ² .

The method for manufacturing an insect repellent masterbatch 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.

When the content of the liquid insect repellent and the content of the carrier material are within the above ranges, an insect repellent masterbatch for nonwoven fabric having excellent insect repellent performance and dispersion index can be obtained. If at least one of the content of the liquid insect repellent and the content of the carrier material is out of the above range, an insect repellent masterbatch for nonwoven fabric having at least one of insect repellent performance and dispersion index inferior can be obtained.

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

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

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

The liquid insect repellent may be a natural insect 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.

The carrier material can increase the dispersion index of the insect repellent masterbatch for nonwoven fabric while serving as a bridge 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 manufacturing method of the insect repellent masterbatch for nonwoven fabric may further include a step (S20) of extruding and pelletizing the raw material mixture after the step (S10).

Another aspect of the present invention provides an insect repellent masterbatch for nonwoven fabrics prepared according to the method for manufacturing the insect repellent masterbatch for nonwoven fabrics.

Another aspect of the present invention is an insect repellent for nonwoven fabric comprising a base resin, an insect repellent component and a carrier material, wherein 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. A masterbatch is provided. When the content of the insect repellent component and the content of the carrier material are within the above ranges, an insect repellent masterbatch for nonwoven fabric having excellent insect repellent performance and dispersion index can be obtained. If at least one of the content of the insect repellent component and the content of the carrier material is out of the above range, an insect repellent masterbatch for nonwoven fabric having at least one of inferior insect repellent performance and dispersion index may be obtained.

The insect repellent component may be a residue of the liquid insect repellent described above.

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

Another embodiment of the present invention provides a nonwoven fabric comprising the insect repellent masterbatch for the nonwoven fabric.

The nonwoven fabric may include the insect repellent masterbatch for the nonwoven fabric in an amount of 5 to 20% by weight based on the total weight thereof. When the content of the insect repellent masterbatch for non-woven fabric 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*) is appropriate. A level nonwoven fabric can be obtained.

In addition, the nonwoven fabric may have a bacteriostatic activity value of 5.0 or more for Staphylococcus aureus and 6.0 or more for bacteriostatic activity of pneumococcal bacteria measured according to a bacteriostatic activity value measurement method (JIS L 1902).

In addition, the nonwoven fabric has an insect repellency rate of 60% or more after 1 week of treatment of adult thieves, and can exhibit sustained performance of 40% or more even after 2 weeks of treatment.

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

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

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

The nonwoven fabric has a maximum breaking strength of 40 to 60 N/5cm, and at this time, the elongation at break is 40 to 80%, and the abrasion fluff evaluation grade may be 1st or 2nd grade.

Two or more of the nonwoven fabrics may be laminated and integrated, or laminated and integrated with one or more nonwoven fabrics of a different type to form a composite nonwoven fabric.

The composite nonwoven fabric has insect repellent and antibacterial functions.

The composite nonwoven fabric may include a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer. Specifically, the composite nonwoven fabric may include a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer integrated with each other by being manufactured in a continuous process in one device.

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.

The meltblown nonwoven fabric layer may be at least partially charged.

In addition, the meltblown nonwoven fabric layer may include an insect repellent. For example, the meltblown nonwoven fabric layer may include an insect repellent masterbatch for the nonwoven fabric.

The composite nonwoven fabric is characterized in that it has a fine particle collecting function by including a meltblown nonwoven fabric layer at least partially charged. However, since the conventional spunbond-meltblown multilayer nonwoven fabric has average pores of several to several tens of micrometers (μm), it has little ability to remove fine particles of the order of 0.1 to 0.6 μm.

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

[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 0.3kgf/5cm/gsm, 0.15 to 0.3kgf/5cm/gsm, 0.20 to 0.3kgf/5cm/gsm, or 0.25 to 0.30kgf/5cm/gsm in the MD direction. Here, gsm is an abbreviation of g/m ² and means the weight per unit area of the composite nonwoven fabric.

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

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 spunbond nonwoven fabric layer, the meltblown nonwoven fabric layer, and the second spunbond 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 meltblown nonwoven fabric layer, and the second spunbond nonwoven fabric layer in a different order.

Each of the first spunbond nonwoven fabric layer and the second spunbond nonwoven fabric layer may 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 manufactured in a continuous process in one device and integrated with each other.

The meltblown nonwoven layer may include at least one electrified meltblown nonwoven sublayer. Specifically, the meltblown nonwoven fabric layer includes only one electrified meltblown nonwoven fabric sublayer, or a plurality of electrified meltblown nonwoven fabric sublayers that are integrated with each other by being manufactured in a continuous process in one device. can include

The meltblown nonwoven fabric layer may further include at least one non-charged meltblown nonwoven fabric sublayer in addition to the at least one electrically charged meltblown nonwoven fabric sublayer. Specifically, the meltblown nonwoven fabric layer includes only one non-charged meltblown nonwoven fabric sublayer in addition to at least one electrified meltblown nonwoven fabric sublayer, or each is manufactured in a continuous process in one device It may further include a plurality of uncharged meltblown nonwoven sub-layers integral with each other.

At least one spunbond nonwoven fabric, at least one electrified meltblown nonwoven fabric, and/or at least one non-charged meltblown nonwoven fabric included in the composite nonwoven fabric may independently include 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 master batch for nonwoven fabric.

Each of the spunbond nonwoven fabric, each of the electrically charged meltblown nonwoven fabric, and/or each of the non-electricalized meltblown nonwoven fabric may further include an additive independently of each other.

The additives may be 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 any of these may include a combination of

Additionally, in one embodiment, antioxidants can function as charge increasing agents. Possible charge increasing agents include thermally stable organic triazine compounds, oligomers or combinations thereof, which compounds or oligomers contain at least one nitrogen atom in addition to the nitrogen in the triazine ring.

For example, charge increasers for the purpose of improving charging characteristics are disclosed in US Pat. 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 of these may be included.

The charge increasing agent is an N-substituted amino aromatic compound, especially a tri-amino substituted compound, such as 2,4,6-trianilino-p-(carbo-2'-ethylhexyl-1'-oxy)- It may be 1,3,5-triazine (UVINUL T-150 manufactured by BASF). Another charge-enhancing agent 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 charge-treated meltblown nonwoven fabric. When the content of the charge increasing agent is within the above range, it is possible to obtain a high level of charging performance, which is the target of the present invention, as well as to maintain good spinnability and high strength of the nonwoven fabric, and is advantageous in terms of cost.

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

The total content of the meltblown nonwoven fabric subjected to the electrical charge 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 electrified meltblown nonwoven fabric is within the above range, a composite nonwoven fabric having excellent filtration performance, shape stability and durability can 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 .

The 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 additional layer may include one or more separate nonwoven fabrics that are neither spunbond nonwoven fabrics nor meltblown nonwoven fabrics.

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

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 one embodiment of the present invention includes continuously forming a spunbond nonwoven fabric layer (S100) and continuously forming a meltblown nonwoven fabric layer on the spunbond nonwoven fabric layer (S200). do.

In the continuous forming step of the spunbond nonwoven fabric layer (S100), a combination of a thermoplastic non-conductive polymer and the above-described insect repellent masterbatch for nonwoven fabric is melted, extruded, cooled, and stretched to form a fiber yarn, and then the fiber yarn is formed on a screen belt. It may be laminated and web formed.

In the continuous forming step of the meltblown nonwoven fabric layer (S200), a fiber yarn is formed by melt extrusion, hot air drawing, and cooling of a thermoplastic, non-conductive polymer (an electrifying performance improving agent may be added), and then the fiber yarn is applied to the spunbond nonwoven fabric layer. In the continuous forming step (S100), it may be laminated on the spunbond formed into a web to form a web.

Specifically, the meltblown nonwoven fabric layer continuous forming step (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) on the free fibers to continuously charge the free fibers (S200-3), and A step (S200-4) of continuously forming a meltblown nonwoven fabric by continuously integrating free fibers may be included.

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

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

(1) In general, as a method that can be charged during the melt blown process, as in U.S. Patent No. 6,375,886, electrification through friction between a polar solvent and filaments being melt-spun, and as in U.S. Patent No. 6,969,484 The method of immersing the meltblown nonwoven fabric in a polar solvent and electrifying it through friction between the water and the nonwoven fabric as water permeates through the nonwoven fabric with a suction device is mainly applied in the industry to manufacture a meltblown nonwoven fabric that has been charged. . 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 nonwoven fabrics 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 treated with an induced charge by a surrounding electric field. Disclosed, this method can obtain a charge-treated meltblown nonwoven fabric without additional post-processing. However, since the nonwoven fabric subjected to the induced electrification treatment by the potential difference shows a phenomenon in which the electrification treatment efficiency rapidly decreases depending on the heat or the surrounding environment, long-term storage is required during the sales process, such as a mask for removing fine dust, or a filter for an air purifier. There is a disadvantage that is difficult to apply to applications where a long service life must be guaranteed. U.S. Patent No. 5,227,172 is incorporated herein by reference in its entirety.

The inventors sprayed the polar solvent with air in the form of a two-fluid on the meltblown nonwoven fabric layer, and rubbed polar solvent particles with sufficient kinetic energy with a small spray amount on the filament during melt spinning to obtain a highly efficient triboelectric effect. This charge treatment device is characterized in that it does not require a separate drying facility because it is sufficiently heated and evaporated by air heated in the DCD (Die to collector distance) section due to a small spray amount. Due to these characteristics, the charge treatment device is characterized in that the nonwoven fabric can be composited by continuous lamination in combination with the nonwoven fabric manufacturing process.

The nonwoven fabric obtained by electrostatically treating the meltblown nonwoven fabric is continuously polarized so that negative and positive charges exist semipermanently, and such nonwoven fabric is referred to as an electret nonwoven fabric.

As described above, the method of manufacturing the composite nonwoven fabric 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 air heated within the DCD (Die to collector distance) section of the composite nonwoven fabric manufacturing apparatus. and may evaporate.

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

In the method for manufacturing the composite nonwoven fabric, after the continuous forming of the meltblown nonwoven fabric layer step (S200) or the continuous forming step of another spunbond nonwoven fabric layer (S300), each spunbond is formed on one or both sides of the meltblown nonwoven fabric layer. A step of continuously thermally compressing the nonwoven fabric layer (S40) may be further included.

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

The composite nonwoven fabric 10 according to one embodiment of the present invention includes a first spunbond nonwoven fabric layer 11, a meltblown nonwoven fabric layer 12, and a second spunbond nonwoven fabric layer 13.

At least one of the first spunbond nonwoven fabric layer 11, the meltblown nonwoven fabric layer 12, and the second spunbond nonwoven fabric layer 13 is a nonwoven fabric according to one embodiment of the present invention described above (ie, an insect repellent master for nonwoven fabric) non-woven fabric containing a batch) may be.

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

Another aspect of the present invention provides an article comprising the nonwoven fabric or 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 intended to explain 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 34g/10min 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 by mixing in a ratio of 20:8:7:9 based on weight and using silica as a carrier material by melting and kneading. 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) among the raw materials consisting of the base resin, the liquid insect repellent and the carrier material are shown in Table 1 below, 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 (by weight) of the carrier material among the insect repellent masterbatches prepared in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4 are shown in Table 2 below. indicated respectively.

Example comparative example 1-1 1-2 1-3 1-1 1-2 1-3 1-4 Content of insect repellent ingredients (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

As the polymer for forming the spunbond nonwoven fabric layer (SB), a propylene homopolymer (LG Chem, H7700) having a melt index (MI) of 34g/10min was used, and as the polymer for forming the meltblown nonwoven fabric layer (MB), melt flow A resin (LG Chem, H7910) having an 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 It was added according to the ratio shown in Table 3. In addition, Chimassorb 944, a hindered amine light stabilizer, was added in an amount of 0.5 wt% to the polymer for forming the meltblown nonwoven fabric layer (MB). Thereafter, a composite nonwoven fabric in the form of a spunbond-meltblown-spunbond (SMS) was continuously manufactured using a composite nonwoven fabric manufacturing apparatus as shown in FIG. 1 . Specifically, the meltblown nonwoven fabric layer (MB) is continuously charged by contacting water with air through a two-fluid nozzle in the composite nonwoven fabric manufacturing apparatus, and then laminated on top of the spunbond nonwoven fabric layer (SB), Another spunbond nonwoven fabric layer (SB) is laminated on top of the meltblown 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 thermal compression 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 meltblown nonwoven fabric layer (MB) was adjusted to 22 gsm.

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

Evaluation Example 1: Evaluation of Dispersion Index of Insect Repellent Masterbatch

The dispersion indices of the insect repellent masterbatches prepared in Examples 1-1 to 1-3 and Comparative Examples 1-1 to 1-4 were 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 physical properties of composite nonwoven fabric

The physical properties of the composite nonwoven fabrics 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) Radioactivity: Observe whether or not the nonwoven web is broken, and if not broken, it was recorded as "good".

(2) Bacteriostatic activity: In the bacteriostatic activity measurement method, bacteria (i.e., staphylococcus or pneumococcus) are inoculated (i.e., the test sample completely absorbs the test bacterial solution) and cultured for 18 hours to determine the number of bacteria before and after incubation. way to check The bacteriostatic activity value is measured in the following way: That is, when the number of bacteria after cultivation of the unprocessed control group is C and the number of bacteria after cultivation of the insecticide-treated product is B, the bacteriostatic activity value is calculated according to Equation 2 below. . Here, the raw control group and the processed product are the same in terms of having a configuration including three layers of a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer in this order, and the unprocessed control group is The processed products are different from each other in that they have not been treated with insect repellent, while the processed products have been treated with insect repellent.

[Equation 2]

Bacteriostatic activity = Log (C/B)

(3) Insect repellent avoidance rate and sustained performance of adult thieves: The insect evasion rate of adult thieves is expressed as a percentage (%) of the number of surviving thieves of the processed product relative to the number of surviving thieves in the raw control group. Indicates the repelling performance of processed products. Here, the raw control group and the processed product are the same in terms of having a configuration including three layers of a first spunbond nonwoven fabric layer, a meltblown nonwoven fabric layer, and a second spunbond nonwoven fabric layer in this order, and the unprocessed control group is The processed products are different from each other in that they have not been treated with insect repellent, while the processed products have been treated with insect repellent. The insect evasion rate of the adult thief is measured in the following way: First, an adult thief medium is placed in petri dish (large) 1, petri dish (small) 1 is stacked in the center, and petri dish (small) 1 is raw control and Place lure feed. After that, put an adult medium in the petri dish (large) 2, pile the petri dish (small) 2 in the center, and place insecticide-treated products and feed for bait in the petri dish (small) 2. Then, put it in an airtight container, and after 24 hours, take out petri dish (small) 1 and petri dish (small) 2 and check the number of surviving ticks, respectively. Finally, the insect repellence rate of adult thieves is calculated according to Equation 3 below.

[Equation 3]

Insect repellent avoidance rate (%) of adults = (number of mealworms in petri dish (small)1 - number of mealworms in petri dish (small)2)/number of mealworms in petri dish (small)1 × 100

In Equation 3, the living thief means an adult thief that responds to an external stimulus.

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

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

② Attach a sample between the wrist and the elbow of a person and aging for 24 hours

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

- Level 1: Same as initial skin

- Level 2: Slight redness

- Grade 3: More than half flush

- Grade 4: Redness in all areas

(4) Color difference system deviation (ΔE ^* ): The skin test measurement method is as follows: The color difference system deviation (ΔE ^* ) of the composite nonwoven fabric was measured using a color difference meter ((CM3700D, Minolta).

(5) Air permeability performance: After installing the sample in the measuring device according to the KSK 0507 method using the FX3300 air permeability meter, the air permeability (air permeability) was measured under the measurement area and the measurement pressure.

(6) Breaking strength and elongation at break: Using a tensile strength elongation machine (Instron) measuring equipment, a test piece with a width of 5 cm is stretched under the condition of a gap between grips of 10 cm and a tensile speed of 500 mm/min according to the KSK 0520 method, and the breaking strength is measured. and elongation at break were measured.

(7) Abrasion fluff: Using the Martindale 404 measuring facility, the fluff was measured by rubbing a 15 cm piece several times using the KSK 0504 method.

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
not allowed Good radiation
not allowed radiation
not allowed Good Good Bacteriostatic activity of staphylococci 6.0 5.7 5.2 measurement
not allowed 2.0 measurement
not allowed measurement
not allowed 1.5 2.0 Bactericidal activity of pneumococcal 6.8 6.4 6.1 not measurable 1.5 measurement
not allowed measurement
not allowed 1.6 1.8 Insect repellent avoidance rate of adult thieves (after 1 week of treatment) 75% 70% 65% not measurable 25% measurement
not allowed measurement
not allowed 20% 15% Insect repellent avoidance rate of adult thieves (2 weeks after treatment) 55% 48% 42% not measurable 30% measurement
not allowed measurement
not allowed 25% 20% Skin patch test grade 1st grade 1st grade 1st grade not measurable 1st grade measurement
not allowed measurement
not allowed 1st grade 1st grade Colorimeter Deviation (ΔE ^* ) 2.8 2.4 2.2 not measurable 1.5 measurement
not allowed measurement
not allowed 3.5 1.5 Air permeability (cm ³ /cm ² /s) 350 420 410 not measurable 450 measurement
not allowed measurement
not allowed 430 450 Maximum breaking strength (N/5cm) 55 60 57 measurement
not allowed 55 measurement
not allowed measurement
not allowed 62 60 Elongation at break (%) 50 55 53 measurement
not allowed 60 measurement
not allowed measurement
not allowed 55 57 Abrasion Lint Assessment 1st grade 1st grade 1st grade not measurable 1st grade measurement
not allowed measurement
not allowed 1st grade 1st grade

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

However, in Comparative Examples 2-1, 2-3, and 2-4, spinning itself was not possible, so nonwoven fabrics could not be produced.

In addition, the composite nonwoven fabrics prepared in Comparative Examples 2-2, 2-5 and 2-6 showed poor insect repellent effects. In particular, the composite nonwoven fabric prepared in Comparative Examples 2-5 has a color difference system deviation (ΔE ^* ) beyond an appropriate level, and thus cannot appeal to consumers as an organic feeling.

The present invention has been described with reference to the drawings and embodiments, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other implementations are possible therefrom. Therefore, the true technical scope of protection 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: meltblown nonwoven fabric layer 13: second spunbond nonwoven fabric layer

Claims (17)

delete delete delete delete delete delete delete A nonwoven fabric comprising an insect repellent masterbatch for nonwoven fabric,
The insect repellent masterbatch for nonwoven fabric includes a base resin, an insect repellent component and a carrier material,
The content of the insect repellent component in the insect repellent masterbatch for nonwoven fabric is 300 to 500 ppm by weight,
In the insect repellent masterbatch for nonwoven fabric, the content of the carrier material is 30,000 to 50,000 ppm by weight,
The base resin includes a non-conductive polymer selected from polyolefins, polystyrenes, polycarbonates, polyesters, polyamides, copolymers thereof, or combinations thereof,
The insect repellent component is a residue of a liquid insect repellent, and the liquid insect repellent includes cinnamaldehyde, α-copaene, apiol, oleic acid, or a combination thereof,
the carrier material comprises silica, zeolite, kaolin or combinations thereof;
The nonwoven fabric is a nonwoven fabric comprising the insect repellent masterbatch for the nonwoven fabric in an amount of 5 to 20% by weight based on its total weight. delete According to claim 8,
The nonwoven fabric has a bacteriostatic activity value of Staphylococcus aureus of 5.0 or more and a pneumococcal bacteriostatic activity value of 6.0 or more measured according to the bacteriostatic activity value measurement method (JIS L 1902). According to claim 8,
The nonwoven fabric has an insect repellent avoidance rate of adult thieves of 60% or more after 1 week of treatment, and a nonwoven fabric that exhibits a continuous performance of 40% or more even after 2 weeks of treatment. According to claim 8,
The non-woven fabric is a non-woven fabric having a skin patch test grade of 1 or higher. According to claim 8,
The nonwoven fabric has a color difference system deviation (ΔE ^* ) of 2.0 to 3.0. According to claim 8,
The nonwoven fabric is a nonwoven fabric expressing air permeability of 300 to 700 cm ³ / cm ² /s. An article comprising the nonwoven fabric according to claim 8. According to claim 15,
The article is a health or medical article. According to claim 8,
The insect repellent masterbatch for the non-woven fabric has a dispersion index of 0.6 or more and less than 1.0 non-woven fabric.