KR20160018184A - Insect repellent functional texture and manufacturing method thereof - Google Patents

Abstract

A functional fabric and a method of making the same are provided, wherein the functional fabric according to an embodiment of the present invention includes a first binder layer comprising a capsule comprising an insecticide material, a fabric layer disposed over the first binder layer, And a second binder layer comprising a capsule containing a repellent material, wherein the thickness of the first binder layer may be greater than the thickness of the second binder layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a functional fabric having an antifouling property,

A functional fabric having an insecticidal property and a method for producing the functional fabric are provided.

Permethrin is a synthetic pyrethroid that exhibits insect repellency and knockdown activity against insects. Piretroids, including both natural compounds and synthetically prepared analogs thereof, can effectively control various insects such as ticks, cockroaches, houseflies, mosquitoes, black flies, fleas, and other flying or crawling insects. In addition, pyrethroids are harmless to plants, animals and humans and do not leave any harmful residues. Therefore, development of a functional fabric having insect proof effect using the characteristics of the pyrethroid has been developed. However, despite the good properties of pyrethroid, permethrin may have a short persistence of insecticide. This is because permethrin is decomposed into inert non-salivary material when exposed to oxygen and ultraviolet light. The rate of decomposition of permethrin is determined by the environment in which permethrin is placed, but generally occurs within hours to days or weeks. Because of the instability of permethrin, the effect as an insecticide is severely limited. Therefore, research has been continued to maintain the insecticidal effect of permethrin. For example, a method has been proposed for encapsulating pyrethroids to improve the stability of pyrethroids against degradation.

Furthermore, there is a padding technique as a method of coating a material having a repellent effect on the fabric material, but the functional fabric produced by this method may have low washing resistance.

One embodiment according to the present invention is for improving washing resistance.

Embodiments according to the present invention can be applied to achieve other tasks not specifically mentioned other than the above-mentioned problems.

An embodiment in accordance with the present invention comprises a capsule comprising a first binder layer comprising a capsule comprising an insecticidal material, a fabric layer disposed on the first binder layer, and a fabric layer disposed on the fabric layer, And a second binder layer, wherein the thickness of the first binder layer is greater than the thickness of the second binder layer.

The first binder layer may include a plurality of pores.

The thickness of the first binder layer may be from about 200 [mu] m to 600 [mu] m, and the thickness of the second binder layer may be from about 1 [mu] m to 50 [mu] m.

The detection concentration of the repellent substance after about 10 times of washing of the functional fabric may be about 70% or more of the detection concentration before washing.

The repellent material may be hydrophobic.

The binder in the binder layer may be a polyurethane dispersion (PUD), a polyethylene terephthalate (PET), a polyether sulfone (PES) polyol, an acrylic emulsion, a polyurethane / acrylic copolymer, Or an NBR / SBR latex.

In one embodiment according to the present invention, there is provided a method of preparing a fabric, comprising the steps of preparing a fabric, preparing a coating solution comprising a capsule containing a repellent material and a binder, applying the coating solution on one side of the fabric, Coating at least one method, and dipping the fabric into a coating solution. ≪ Desc / Clms Page number 2 >

The step of preparing the coating solution may include adding at least one additive selected from the group consisting of a silicone antifoam, a polymer surfactant, a thickener or a crosslinking agent.

The coating solution may comprise from about 1 to 25 weight percent insecticide material, from about 0.1 to 30 weight percent additive, from about 20 to 60 weight percent binder, and from about 1 to 30 weight percent water.

The method of making a functional fabric may further include the step of heat treating the fabric.

The heat treatment conditions may be performed at about 150 to 170 DEG C for about 1 to 5 minutes.

An embodiment of the present invention can improve washing resistance.

1 is a schematic view showing a functional fabric according to an embodiment of the present invention.
Fig. 2 is an FE-SEM photograph of the functional fabric specimens after the 0th, 5th, and 10th washings of Example 1 at 50x magnification and 100x magnification, respectively.
Fig. 3 is an FE-SEM photograph taken at a magnification of 50 times and 200 times, respectively, of one side of the fabric to which the second binder layer of Example 1 is located.
Fig. 4 is a FE-SEM photograph of the fabric of the fabric in which the first binder layer of Example 1 is placed, each of which was photographed at 50x magnification and 200x magnification, respectively.
FIG. 5 is an FE-SEM photograph of the functional fabric specimen after the 0th washing of Comparative Example 1 at 100, 500, and 2000 magnifications, respectively.
FIG. 6 is an FE-SEM photograph of the functional fabric specimen after 5 times of washing according to Comparative Example 1, which was measured at 100, 500, and 2000 magnifications, respectively.
Fig. 7 is an FE-SEM photograph of the functional fabric specimen after 10 cycles of washing according to Comparative Example 1 at 100, 500, and 2000 magnifications, respectively.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and a detailed description of well-known known technologies will be omitted.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. It will be understood that when an element such as a layer, film, region, plate, or the like is referred to as being "on" another portion, it includes not only the element directly over another element, On the other hand, when a part is "directly on" another part, it means that there is no other part in the middle. On the contrary, when a portion such as a layer, film, region, plate, or the like is referred to as being "under" another portion, this includes not only the case where the other portion is "directly underneath" On the other hand, when a part is "directly beneath" another part, it means that there is no other part in the middle.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

Hereinafter, one embodiment of the present invention will be described in detail. However, it should be understood that the present invention is not limited thereto, and the present invention is only defined by the scope of the following claims.

1 is a schematic view showing a functional fabric according to an embodiment of the present invention.

Referring to FIG. 1, in one embodiment of the present invention, a first binder layer 101 comprising a capsule containing an insecticide material, a fabric layer 102 positioned above the first binder layer, 102 and a second binder layer 103 comprising a capsule comprising an insecticide material.

At this time, the thickness (W1) of the first binder layer may be thicker than the thickness (W2) of the second binder layer, so that the insect repellent function of the functional fabric can be improved. For example, the thickness (W1) of the first binder layer may be between about 1 [mu] m and 600 [mu] m and the thickness (W2) of the second binder layer may be between about 1 [mu] m and 300 [mu] m. For example, the thickness (W1) of the first binder layer may be about 200 to 600 占 퐉, the thickness (W2) of the second binder layer may be about 1 to 50 占 퐉, And the production cost can be reduced.

Further, the first binder layer may include a plurality of pores. The breathability of the fabric can be improved through the plurality of pores on the functional fabric 100. This pore can maximize the effect of the encapsulated insecticide permethrin (permethrin), thereby creating a pathway in which the desired properties can be exhibited in an optimal state. The design of an artificial pore (microporus) is one of the most important parts of the coating technology. If the size is too large, the effective perm caprin permethrin can be quickly lost during washing. If it is too small, It may interfere with volatilization and cause problems in maximizing physical properties. Therefore, the design of pores must be effectively controlled in the coating process and in the heat treatment process. However, the presence of pores may be eliminated depending on various conditions such as the kind of fabric, so it can be applied depending on the situation.

The fabric 102 may be a natural material such as cotton, a synthetic material such as nylon, polyesters, or the like, or a natural / synthetic blend material. However, the present invention is not limited thereto.

An insect repellent material (not shown) encapsulated within the first or second binder layer 101,103 may be present in a dispersed form and the encapsulated insect repellant material may be coated on the fabric 102 to provide an excellent release It can exhibit a performance insecticidal effect.

The detection concentration of the repellent material after about 10 times of washing of the functional fabric 100 may be about 70% or more of the detection concentration before washing. For example, it can be about 90% or more. Generally, when the functional fabric 100 containing a substance exhibiting an insecticidal effect is washed, the insect repellent material may be lost during the washing process, and the insecticidal effect may be abruptly lowered. However, the functional fabric 100 according to an embodiment of the present invention maintains the concentration of the repellent material detected in the functional fabric 100 even after about ten washes, at least about 70% of the detected concentration before washing, And the insecticidal effect can be exhibited.

The repellent material may be hydrophobic. For example, the repellent material may be at least one of permethrin, diethylenetriamide (DEET), or a mixture of permethrin and DEET. The hydrophobic medicament can be advantageous in minimizing the loss of laundry by washing in the state of being captured in an encapsulation film made of the polymer of the porous layer and securing a long-term property of the properties by maximizing the sustained release in the air.

The binder of the binder layers 101 and 103 may be a polyurethane dispersion (PUD), a polyethylene terephthalate (PET), a polyether sulfone (PES) polyol, an acrylic emulsion, a polyurethane / Acrylic copolymer, or an NBR / SBR latex.

The functional fabric 100 can be applied to all living fabric materials such as clothes (military uniforms), tents, matting, shoes, indoor curtains, bedding, etc., and can exhibit a constant insecticidal effect.

In one embodiment in accordance with the present invention, a method is provided that includes the steps of preparing a fabric 102, preparing a coating solution comprising a capsule and a binder comprising a repellent material, screen printing the coating solution on one side of the fabric 102, Knife coating, or gravure printing. ≪ RTI ID = 0.0 > [0002] < / RTI > Further, after the coating step, the method may further include dipping the fabric 102 into the coating solution. By the method of manufacturing the functional fabric 100 according to an embodiment of the present invention, the functional fabric 100 coated on both sides can be manufactured.

Hereinafter, the description of the functional fabric 100 according to an embodiment of the present invention will be omitted.

First, preparing the fabric 102 is to prepare a fabric 102 that serves as a substrate for the coating process using a coating solution containing an insecticide material. The fabric 102 used herein may be selected without limitation depending on the application of the functional fabric to be produced. For example, the fabric 102 may be a natural material such as cotton, a synthetic material such as nylon, polyesters, or the like, or a natural / synthetic blend material.

Next, preparing a coating solution containing a capsule containing a repellent material and a binder is a step of preparing a coating solution in which a capsule containing an insect repellent material is dispersed in a binder solution. Here, the repellent material may have hydrophobicity, for example, permethrin. The binder may also be a polyurethane dispersion (PUD), a polyethylene terephthalate (PET), a polyether sulfone (PES) polyol, an acrylic emulsion, a polyurethane / NBR / SBR latex. Thus, a coating solution in which an encapsulated insect repellent material is uniformly dispersed in a binder solution can be produced.

The step of preparing the coating solution may comprise adding to the coating solution at least one additive of a silicone antifoam, a polymer surfactant, a thickener or a crosslinking agent.

These additives can ensure the uniformity, durability of the film, and uniform dispersibility of the encapsulated insect repellent.

For example, the coating solution may comprise about 1 to 25 weight percent insecticide material, about 0.1 to 30 weight percent additive, about 20 to 60 weight percent binder, and about 1 to 30 weight percent water. Here, the additive may be a silicone antifoaming agent, a polymer surfactant, a crosslinking agent, a thickening agent, a wetting agent, or the like. Within this range, the encapsulated insect repellent can secure the recommended capacity of WHO / EPA and the World Health Organization, and the surfactant among the additives within the above range has uniformity of the coating upon coating / impregnation, Reduce. In addition, the crosslinking agent among the additives within the above range can strongly maintain the surface physical properties of the polyurethane binder, thereby maximizing the adhesive force with the fiber structure and maintaining excellent washing resistance.

The step of preparing the fabric 102 and the step of preparing the coating solution may be performed without restraint in the order in which they are performed.

The step of coating the coating solution on one side of the fabric 102 with at least one of screen printing, knife coating, or gravure printing may be performed by using a roller, knife, screen or the like, not by the conventional padding method, Or gravure printing to form the first binder layer 101. [0064] This allows the encapsulated insect repellent material coated on the fabric 102 to be coated more stably so that the functional fabric 100 exhibits good sustained release and persistence of insecticidal effects.

After the step of coating the coating solution on one side of the fabric 102 with at least one of screen printing, knife coating or gravure printing, drying may be further performed.

The step of dipping the fabric 102 into the coating solution is a step of impregnating the coating solution with one side or both sides of the fabric 102 coated on the one side by screen printing or gravure printing. Through this, the stability of the already formed coating layer can be further enhanced, or the second binder layer 103 can be formed so that the insect proof effect appears on the back surface on which the coating layer is not completely formed. Dipping according to an embodiment of the present invention is not a general padding technique but impregnation in a binder-containing solution can ensure additional durability and minimize untreated areas due to coating.

The method of making the functional fabric 100 may further include heat treating the coated fabric. Through this, the binder layer comprising the encapsulated insect repellent material can be stabilized.

For example, the heat treatment conditions may be performed at about 150 to 170 占 폚 for about 1 to 5 minutes. Within the above range, the crosslinking agent in the coating solution increases the strength of the coating film of the binder due to a thermal reaction, so that excellent durability (washing resistance) can be exhibited.

The thickness of the coated binder layer 101, 103 of the functional fabric 100 to be manufactured can be controlled by varying the process conditions and the coating solution used.

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. However, the following Examples are merely examples of the present invention, but the present invention is not limited to the following Examples.

< Example  1> - Production of functional fabrics by screen printing

First, prepare a 100% cotton / single jersey fabric. A coating solution is prepared by mixing about 10% by weight of encapsulated permethrin, about 50% by weight of a polyurethane binder, about 10% by weight of an additive comprising a crosslinking agent, and about 20% by weight of water.

At this time, the binder includes a polyurethane dispersion (PUD).

Next, the coating solution is prepared by coating with a screen printing technique, and then a single dipping is attempted to complete. Specifically, the coating is applied using a screen of about 135 mesh.

Next, the moisture is dried at about 130 캜 for about 2 minutes, and the thermosetting is performed at about 150 캜 for about 2 minutes to produce a functional fabric.

Fig. 2 is a photograph of the cross sections of the functional fabric specimens after the 0th, 5th, and 10th washes of Example 1 at 50x magnification and 100x magnification respectively using FE-SEM (SU 8010, Hitachi, Japan).

Referring to the FE-SEM photograph of FIG. 2 magnified at a magnification of 100, a relatively thick coating layer is formed on the lower surface of the fabric, which is a binder layer formed by the screen printing. It is also possible to identify the binder material dispersed on the net fabric fabric at the lower density on the fabric upper surface, which is formed through the dipping.

< Comparative Example  1> - padding ( padding ) Fabrication of Functional Fabrics by Method

First, a 100% cotton / single jersey fabric was prepared and mixed with about 10% by weight of encapsulated insect repellant, about 85% by weight of water, and about 5% by weight of a surfactant and ion- The prepared padding solution is prepared and impregnated and padded in the tenter equipment. Next, the impregnated and padded fabric is dried at about 150 &lt; 0 &gt; C for about 2 minutes to produce a functional fabric.

< Experimental Example  1> within Washability  evaluation

O-meter (Launder-O-Meter, Atlas LP2, Atlas, Co) according to KSK ISO 105-C01 for observing changes in the surface of the functional fabric prepared in Example 1 and Comparative Example 1 according to the durability of washing. (About 50 g / l of liquid soap solution, about 50 g / l of solution (AATCC washability test standard)) at about 40 ° C for about 30 minutes, using one cycle . After 0, 5, and 10 cycles of washing the fabric, compare the front and back conditions of each specimen.

Fig. 2 is a photograph of the cross sections of the functional fabric specimens after the 0th, 5th, and 10th washes of Example 1 at 50x magnification and 100x magnification respectively using FE-SEM (SU 8010, Hitachi, Japan) Fig. 3 is a photograph of one side of the fabric facing the second binder layer of Example 1 taken at 50x magnification and 200x magnification in the same manner, Fig. 4 is a photograph of the fabric of Example 1 where the first binder layer is located, In the same manner, 50 times and 200 times, respectively.

5 is a photograph of one side of the functional fabric sample after the 0th washing of Comparative Example 1 measured at 100, 500, and 2000 magnifications, respectively, using FE-SEM (SU 8010, HITACHI, Japan) Fig. 7 is a view showing one side of the functional fabric specimen after 10 cycles of washing according to the comparative example 1, using FE-SEM (SU 8010, HITACHI, Japan) 100, 500, and 2000 magnification, respectively. In Figures 5-7, unlike Figures 2-4, no coating layer is identified, but only the encapsulated permethrin particles are observed.

Referring to FIG. 2 to FIG. 7, it can be seen that the amount of residual capseurization insecticide after washing about 5 to 10 times compared to Comparative Example 1 is much higher than that of Example 1. In Example 1, the residual amount of the encapsulated insect repellent agent in the form of a globe, which is visually per unit area at the same magnification, can be easily confirmed. Also, referring to FIGS. 2 to 4 of Example 1, while spherical capsules maintain a relatively perfect spherical shape with the aid of coating gaming, in FIG. 5 of Comparative Example 1, the spherical shape is broken by an external impact, . It can be easily seen that the destruction of the capsules does not meet the objective of long-term release of the desired insecticide properties.

In order to evaluate the washing resistance of each of the 0, 5, and 10 times of the functional fabric samples, the following experiment is performed.

First, the functional fabric prepared in Example 1 was finely cut into a size of about 5 mm x 5 mm, weighed about (4 0.5) g, placed in a sample bottle of about 50 mL, and about 40 mL of organic solvent (methanol) Lt; / RTI &gt; Next, the permethrin in the fiber is extracted for about 1 hour by using an ultrasonic wave extractor. Then, the extracted extract is filtered using a filter paper and transferred to a 50 mL volumetric flask. The extract thus obtained was analyzed using a gas chromatograph / mass selective detector (GC / MSD, 6890 (GC), 5973N (MSD, Agilent) Measure the amount.

a. Column: HP-5MS UI (30 m * 0.25 mm * 0.25 m)

b. Injection: At about 250 ° C, a volume of 1 uL

c. Carrier gas: Helium at a rate of about 1 mL / min

d. Detector: MS, about 280 DEG C

e. Oven: Temperature rise from about 120 ° C to 300 ° C at a rate of about 10 ° C / min

In addition, in order to separately measure the release effect of permethrin due to friction, the functionalized cloth of Example 1 was treated with 0 times of hand rubbing about 10 times, And the control criterion is the same as 0 times of washing. This is an experiment in which the occurrence of friction due to movement when an actual person wears clothes can predict physical properties. This experiment confirms that the friction has a positive effect on the expansion of insecticide. After performing the friction in this way, the amount of permethrin detected is measured.

The amount of permethrin detected in the above experiment is shown in Table 1 below.

Sample name Washing times
And details Detection concentration ( mg / kg ) permethrin Sum of contents Result value Example  One 0 times 28161 5 times 34249 10 times 29779 10 times of friction 36492

Referring to Table 1, it can be seen that the detection amount of permethrin increases as the number of washing times increases from zero to ten. This is expected to be due to the higher amount of permethrin released by the frictional effect, compared to the amount of permethrin lost in the washing process. It can be seen that the concentration of permethrin detected after 10 times of rubbing against 0 times treated functional fabric increases from 28161 mg / kg to 36492 mg / kg. For reference, when the number of washings increases, the measured concentration of permethrin is higher than that of the predicted results, and it can be confirmed that the impact of the insect repellent on each wash is slightly higher or lower , Which indicates that the encapsulated insecticide trapped in the film can produce its properties for a long time.

On the other hand, as can be seen from FIGS. 5 and 6, the padding technique used in the past confirms that insect repellent remains in the fiber by simply emulsifying the hydrophobic insect repellent or by padding the encapsulated insect repellent using the electrical characteristics of the solution However, even a single wash will almost completely eliminate the insecticide material.

Referring to the results of the experiment, the functional fabric according to an embodiment of the present invention is excellent in washing resistance and can effectively release the insecticide even after several times of washing, indicating that the insecticidal effect can be maintained for a long time.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: Functional Fabrics
101: first binder layer
102: fabric fabrics
103: second binder layer
W 1: thickness of the first binder layer
W 2: thickness of the second binder layer

Claims (12)

A first binder layer comprising a capsule comprising a repellent material,
A fabric layer disposed on the first binder layer, and
A second binder layer disposed on the fabric fabric layer and comprising a capsule comprising an insecticide material,
/ RTI &gt;
Wherein the thickness of the first binder layer is greater than the thickness of the second binder layer.
The method of claim 1,
Wherein the thickness of the first binder layer is 200 占 퐉 to 600 占 퐉 and the thickness of the second binder layer is 1 占 퐉 to 50 占 퐉.
3. The method of claim 2,
Wherein the first binder layer comprises a plurality of pores.
The method of claim 1,
Wherein the detection density of the repellent material after 10 times of washing of the functional fabric is 70% or more of the detection density before washing.
The method of claim 1,
The repellent material is a hydrophobic functional fabric.
The method of claim 1,
The binder of the binder layer may be a polyurethane dispersion (PUD), a polyethylene terephthalate (PET), a polyether sulfone (PES) polyol, an acrylic emulsion, a polyurethane / acrylic copolymer , Or an NBR / SBR latex.
Preparing a fabric,
Preparing a coating solution comprising a capsule comprising a repellent material and a binder,
Coating the coating solution on one side of the fabric with at least one of screen printing, knife coating or gravure printing, and
&Lt; / RTI &gt;
8. The method of claim 7,
Further comprising dipping said fabric into said coating solution. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt;
9. The method of claim 8,
Wherein the step of preparing the coating solution comprises:
Wherein the method comprises adding at least one additive selected from the group consisting of a silicone antifoam, a polymer surfactant, a thickener, or a crosslinking agent.
9. The method of claim 8,
The coating solution may contain,
1 to 25% by weight insecticidal material,
0.1 to 30% by weight of the additive,
20 to 60% by weight of a binder, and
From 1 to 30% by weight of water.
9. The method of claim 8,
&Lt; / RTI &gt; further comprising the step of heat treating the fabric.
12. The method of claim 11,
Wherein the heat treatment is performed at 150 to 170 ° C for 1 to 5 minutes.

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