KR101817935B1 - Antibacterial Multi-layered Insole Containing Natural Substance - Google Patents

Abstract

The present invention relates to an antibacterial insole having multi-layered structure containing natural substances, which is integrally bonded by an antibacterial binder containing natural substances and seated on an inner bottom of shoes, wherein a multi-layered structure comprises a lower layer composed of an elastic foam sheet, an intermediate layer composed of a nonwoven web, and an upper layer composed of an antibacterial fiber sheet. The multi-layered antibacterial insole according to the present invention has antibacterial, far-infrared radiation and deodorizing functions by containing natural antibacterial and deodorizing natural substances, functional ceramics, and adsorbents, and is capable of removing uncleanness and causes for a bed smell such as sweat, germs, bacteria and harmful substances inside shoes. As a result, the shoes are comfortable to wear and can protect feet cleanly by sanitary functions of antibacterial insole while wearing shoes, and can also maintain antibacterial and deodorizing effects while wearing shoes for a long time.

Description

{Antibacterial Multi-layered Insole Containing Natural Substance}

The present invention relates to a multilayer structure comprising a lower layer composed of an elastic foam sheet, an intermediate layer composed of a nonwoven web, and an upper layer composed of an antibacterial fiber sheet integrally bonded by an antibacterial binder containing a natural substance, ≪ / RTI >

Recently, the functional shoe market has been greatly activated and functional shoe has been developed and marketed to meet various needs of consumers. The functionality of these shoes is mostly given to the sole of the shoe so as to provide functionality such as insole, midsole, Outsole, and so on. Especially, the functionality of the insole, which is in direct contact with the sole, is very important and has been developed in various ways.

The functions of the insole developed so far are mainly to improve the physical properties such as the repulsive elasticity and the restoring force to mitigate the impact of the sole which is received from the ground by the load of the human body when walking on the foot, and to reduce the fatigue of the sole or to manufacture the insole It was about insole that included silver nanoparticle or copper in the synthetic resin adhesive medium to impart antibacterial and deodorizing function in shoes.

Silver nanoparticles, which are added to increase the antibacterial and deodorizing ability of the insole, are generally known to be harmless to the human body. However, recent research has shown that silver is absorbed by the human body and causes silver poisoning. And to change it.

For example, Korean Utility Model No. 0259698 discloses a method for improving the antimicrobial and deodorizing function of an insole, which is harmless to the human body. For example, in the Korean Utility Model No. 0259698, natural wormwood is added to footwear insole such as shoes, slipper, A cloth made of natural fibers or the like is adhered to the upper part of a plate made by blending dry wool mugwort and natural rubber in a footwear insol and a Korean Utility Model Bulletin No. 1999-0001131 mixed with 50 wt% A perforated shoe insole was proposed.

However, when the mugwort powder is contained in the synthetic resin in an amount of 5 to 6% by weight or more, the antibacterial and deodorizing performance is improved, but the mugwort powder contained in the insoluble adhesive medium causes the synthetic resin The antibacterial and deodorizing effect due to the addition of mugwort is limited due to the weakening of resilience and resilience due to weakening of the binding force, The structure is complicated and there is a limit to removing the smell in hot weather like summer season.

Korean Patent Publication No. 0620874 discloses a functional polyurethane insole using urushiol as an extract of saponin, and urushiol suppresses the propagation of various bacteria and fungi and has excellent far-infrared radiation ability, In order to provide polyurethane insoles excellent in antimicrobial, deodorant and far-infrared radiation activity in combination with urethane inks, Korean Patent Laid-Open Publication No. 2002-0044123 discloses a composition comprising various kinds of herbal medicines, Foot odor removal, absorption of sweat, antibacterial function, and preservative effect.

In addition to the components exemplified above, functional insole capable of imparting various functions such as antimicrobial and deodorizing to the insole by using the terpine component of the resin, which contains a large amount of the phytoncide component, has been proposed. However, The function thereof is deteriorated due to the smell and sweat generated from the foot, and in the case of the insole using the herbal medicines, a separate space for filling the medicinal herb should be provided in the insole, and the manufacturing process is complicated and the medicinal herb is filled in the insole, This is a disadvantage.

Accordingly, Korean Utility Model Application No. 2012-0001338 absorbs perspiration generated from foot by mixing activated carbon powder bond with fiber nonwoven fabric or polyurethane foam, and absorbs harmful substances generated in footwear and footwear. In Patent Registration No. 1246649, a biotite dyed fabric is bonded to a shoe insole using an adhesive mixed with biotite, so that the insole has a far infrared ray radiation function, a deodorizing function and an antibacterial function provided by the biotite.

As described above, if a mineral containing an effect such as dehumance, antibacterial, or adsorption is contained in the insole, the odor component can be initially adsorbed and its effect can be obtained. However, since the adsorptivity is deteriorated over time, .

As a result, the footwear is structurally wrapped around the foot, so that the foot wrapped around the footwear is inevitably blocked from the outside air, and because of wearing the shoes for a long time, various bacteria are generated by the sweat coming from the sole and the foreign substances generated in the shoes, The isovaleric acid makes a nasty smell not only by the proliferation but also by the enclosed environment inside the shoe, the fungus reproduces and causes a disease such as athlete's foot.

As described above, the conventional shoe insole manufacturing method is merely a function of neutralizing the smell by putting a fragrance, not basing on the impact prevention function, enhancing the massage function, or fundamentally removing the smell in the shoe, Dehumidification and antimicrobial action, which are the most important requirements in preventing the generation of odor and mold, can not be properly performed, and thus the objective of the functional insol has not been sufficiently achieved.

The present invention solves the above problems and provides an antibacterial insulator which can effectively remove sweat, bacteria and the like from the feet to hygienically protect the feet and keep the inside of the shoe in a pleasant state at all times, .

In order to solve the above-mentioned problems, the present invention provides an underfill comprising an elastic foamed sheet supporting an insole and foamed with a polymer resin mixed with a natural product and a ceramic; An intermediate layer disposed on the lower layer and composed of a nonwoven web in which a deodorant and an adsorbent are mixed with the ceramic-containing nonwoven fabric; And an upper layer composed of an antimicrobial fiber sheet containing natural materials and ceramics, wherein the upper layer is bonded and compressed and formed by an antibacterial binder containing natural materials, and the natural material is selected from the group consisting of collagen, peptide, silk, elastin, chitin, chitosan Wherein the natural material-containing antibacterial binder is at least one selected from the group consisting of alginic acid, dextrin, sericin, papaya, safflower, jojoba, ocher, loess, , 0.5 to 10.0% by weight of ceramic, 4 to 70% by weight of an adhesive and 10 to 95% by weight of a solvent.

The lower layer is composed of 70 to 98% by weight of natural resin mixture resin, 1 to 15% by weight of filler, 0.3 to 3.0% by weight of crosslinking agent, 0.2 to 2.0% by weight of crosslinking aid and 0.5 to 10.0% by weight of foaming agent, Wherein the natural resin mixed resin comprises 1.5 to 15.0% by weight of a natural product, 0.5 to 10.0% by weight of a ceramic, and 75 to 98% by weight of a polymer resin, and the filler is contained in an amount of 1 to 5% Or 1 to 10% by weight of zinc oxide, or even more preferably all of them.

The intermediate layer is preferably a nonwoven web in which 0.5 to 5.0% by weight of an antibacterial binder containing natural material is applied to 45 to 95% by weight of a nonwoven fabric made of short fibers containing ceramics and 4.5 to 50.0% by weight of an adsorbent is incorporated therein , And the upper layer is an antibacterial fiber sheet in which 90.0 to 99.5% by weight of woven, knitted or nonwoven fabric made of short fibers including ceramics, and 0.5 to 10.0% by weight of the natural product are mixed.

Preferably, the antimicrobial insole is coated with a polymer resin melt containing 5 to 10% by weight of a plasticized cellulose derivative and has upper and lower through holes. The plasticized cellulose derivative is obtained by substituting the hydroxyl group of the cellulose with a hydrophobic group and plasticizing Is more preferable.

The multi-layered antimicrobial insole according to the present invention contains antimicrobial, far-infrared radiation and deodorizing performance by containing a natural product having antibacterial and deodorizing ability, functional ceramics and an adsorbent, and is capable of exhibiting sweat, bacteria, bacteria , And harmful substances are removed, so that the hygiene function of the antibacterial insoles at the time of ignition of the shoes makes the grip feeling comfortable, protects the feet cleanly, and maintains the antibacterial and deodorizing effect even when worn for a long period of time.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded view of a multilayered antibacterial insole containing a natural product of the present invention. Fig.
(The dotted line represents an antibacterial binder containing natural products)

The present invention relates to a functional antimicrobial insole which is seated on an inner bottom of a shoe, comprising: an elastic foam sheet (lower layer) foamed with a polymer resin mixed with a natural product and a functional ceramic to support the insole; A nonwoven web (middle layer) in which a deodorant adsorbent is incorporated into the functional ceramic-containing fibrous nonwoven fabric; And an antimicrobial fiber sheet (upper layer) containing a natural product and a functional ceramic are sequentially put into a mold, laminated, and then bonded, compressed and molded by a natural-substance-containing antibacterial binder.

Specifically, sweat, bacteria and the like generated in the feet are removed by the function of natural products, ceramics and adsorbent, so that a pleasant condition can be maintained at all times. The foot odor generated by sweat and harmful substances generated in the shoe are adsorbed, So as to hygienically protect the feet and to improve the feeling of wearing of the foot wearing shoes.

The production of the polymeric resin elastic foam sheet constituting the lower layer of the antimicrobial insolvent is carried out by first kneading 1.5 to 15.0% by weight of natural products, 0.5 to 10.0% by weight of functional ceramics and 75 to 98% 1 to 15% by weight of a filler is added to 70 to 98% by weight of the natural resin mixture resin and kneaded at 50 to 150 ° C for 10 to 100 minutes. Then, 0.3 to 3.0% by weight of a crosslinking agent, 0.2 to 2.0% 0.5 to 10.0% by weight of a blowing agent were added thereto, sufficiently mixed and foamed into a sheet having a thickness of 1 to 10 mm using a roll mill having a surface temperature of 80 to 120 캜 and maintained at room temperature for at least 24 hours to produce an elastic foam sheet do.

The natural product may be selected from the group consisting of collagen, peptide, silk, elastin, chitin, chitosan, alginic acid, dextrin, sericin, safflower, jojoba, loess, loin, cochineal, Or two or more kinds thereof may be used, and they may be used in the form of a natural liquid obtained by mixing with a solvent or an extract obtained by extracting with a solvent.

Wherein the natural solution is a solution obtained by mixing the natural product with the solvent at a concentration of 0.1 to 20.0% by weight, and the extract solution is a solution from which the solid matter in the natural solution has been removed. Examples of the solvent include acetic acid, lactic acid, formic acid, glycolic acid, One or more organic substances such as succinic acid, malic acid, malic acid, succinic acid, ascorbic acid, gluconic acid, tartaric acid, maleic acid, citric acid, glutamic acid, glycerin, ethanol, methanol, isopropanol, ethylene glycol, Sodium hydroxide, sodium carbonate, sodium hydroxide, potassium hydroxide, hydrochloric acid, sulfuric acid, phosphoric acid and the like can be selected and used. An aqueous solution obtained by dissolving the natural product mixture solution or extract in water at a concentration of 1 to 90% It is also possible.

Gypsum, germanium, smectite, gypsum, gypsum, gypsum, gypsum, gypsum, rocksite, mica, eucalyptus, mica, sericite, biotite, vermiculite, jade powder, germanium, It is preferably one or more selected from the group consisting of tourmaline, monazite, pozzolan, bentonite, zeolite, perlite and illite, As the polymer resin, one or more selected from among polyvinyl chloride, polystyrene, silicone resin, ethylene vinyl acetate resin, neoprene resin, ethylene propylene resin (EPR), polyurethane, latex resin, lactide resin and starch .

The filler is used for improving impact absorbability, and one or more of stearic acid, zinc oxide, calcium carbonate, and magnesium carbonate is selected. When the amount of filler is less than 1 wt%, the filler does not fully manifest its function, %, It is difficult to control the foaming process as well as the durability of the insole, which makes it impossible to produce a normal elastic foam sheet.

Stearic acid and zinc oxide, which are the fillers, provide not only impact absorption but also an effect of inducing crosslinking, so that the filler preferably includes stearic acid and / or zinc oxide.

The stearic acid is preferably contained in an amount of 1 to 5% by weight of the elastic foam sheet. When the content of the stearic acid is less than 1% by weight, it is difficult to control the crosslinking speed. When the content of the stearic acid exceeds 5% by weight, blooming may occur. It is preferable that the sheet is contained in an amount of 1 to 10% by weight, and if it is less than 1% by weight, an un-crosslinked portion may occur, and if it is more than 10% by weight, excessive crosslinking may occur.

The crosslinking agent may be at least one selected from the group consisting of t-butyl peroxy isopropyl carbonate, t-butyl peroxylaurate, t-butyl peroxyacetate, di- T-butyl peroxybenzoate, dicumyl peroxide, 1,3-bis (t-butylperoxyisopropyl) benzene, methyl ethyl ketone peroxide, Dimethyl-2,5-di (t-butylperoxy) hexane, di-t-butyl peroxide, 2,5- Butylperoxy) valerate and a, a'-bis (t-butylperoxy) isopropyl (n-butylperoxy) Benzene. If the amount of the cross-linking agent used is less than 0.3% by weight, the cross-linking effect is insufficient and the appearance of the foam is poor and the permanent compressive strain rate becomes poor. If the amount of the cross-linking agent used is more than 3.0% by weight, the crosslinking density due to excessive crosslinking may increase and the foamed gas pressure may be increased to cause the elastic foam sheet to be blown.

The crosslinking aid is used to obtain a proper crosslinking structure for shortening the molding time and improving the durability in the crosslinking of the peroxide. Examples thereof include divinylbenzene, triarylisocyanurate, triarylisocyanurate, ethylene glycol dimethacrylate, diethyl One or more of glycol dimethacrylate, polyethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, aryl methacrylate, vinyl butyrate and vinyl stearate may be selected and used. The amount of the crosslinking aid used If it is less than 0.2% by weight, the crosslinking promoting effect can hardly be obtained. If it is more than 2.0% by weight, it is impossible to produce a normal elastic foam sheet due to crosslinking.

Examples of the foaming agent include azodicarbonamide type, diazomino exo benzene type, n, n'-dinitrosopentamethylenetetraamine type, p-toluenesulfonyl hydride type, p, p'-oxybis-benzenesulfonyl And when the amount of the foaming agent to be used is less than 0.5% by weight, foaming effect is scarcely produced. When the amount of the foaming agent is more than 10.0% by weight, the elastic foam sheet And the durability is deteriorated.

Next, an active nonwoven web constituting an intermediate layer of the antibacterial insol was prepared. After 0.5 to 5.0% by weight of an antibacterial binder containing a natural substance was applied to 45 to 95% by weight of a nonwoven fabric made of short fibers containing the functional ceramics described above, 4.5 to 50.0% by weight are mixed and dried to prepare an active nonwoven web containing the deodorant adsorbent in the functional ceramic-containing short-fiber nonwoven fabric.

The functional fiber-containing staple fiber is a short fiber containing 0.5 to 10.0% by weight of a functional ceramic in a polyester fiber, a nylon fiber, a polypropylene fiber, a polyethylene fiber or an acrylic fiber and has a length of 10 to 100 mm and a thickness of 10 to 100 탆 The nonwoven web preferably has a thickness of 30 to 3000 mu m and a unit weight of 30 to 600 g / m < 2 > per area, and the adsorbent is fixed between the short fibers constituting the web by the antibacterial binder containing the natural material .

The adsorbent may be one or two kinds of materials having a specific surface area of 30 to 3,000 m 2 / g such as powder activated carbon having a particle diameter of 0.1 to 100.0 μm, granular activated carbon having a particle diameter of 100 to 3,000 μm, charcoal, charcoal, coconut fruit husk activated carbon, zeolite, And the natural product-containing antibacterial binder is prepared by dissolving 0.5 to 10.0% by weight of the natural product, 0.5 to 10.0% by weight of the functional ceramic and 4 to 70% by weight of the adhesive in 10 to 95% by weight of the solvent.

Examples of the adhesive include glue, zein, shellac, casein, dextrin, starch, gelatin, chitin, chitosan, alginic acid, sericin, rosin, gum arabic, lacquer, one or more of furan resin, melamine resin, urea resin, urethane resin, ester resin, epoxy resin acrylic resin, silicone resin, latex resin and vinyl resin may be selected.

The following is an antibacterial fiber sheet constituting the upper layer of the insole, wherein 90.0 to 99.5% by weight of a woven, knitted or nonwoven fabric made of short fibers containing functional ceramics is mixed with 0.5 to 10.0% by weight of the natural product, And the staple fibers preferably contain 3 to 30% by weight of functional ceramics. In the mixing of natural products, a natural solution obtained by mixing it with a solvent or a solution obtained by removing solids from a natural solution is added to a woven fabric, a knitted fabric or a nonwoven fabric It can be applied in a form of immersion.

The polymer resin elastic foam sheet (lower layer), the active nonwoven web (middle layer), and the antibacterial fiber sheet (upper layer) prepared as described above were cut into a cavity of a mold, and then the lower layer, middle layer and upper layer were successively injected into the mold The antimicrobial binder containing the natural product is applied and laminated therebetween, and the antibacterial binder is compressed and molded to prepare a multilayered antibacterial insole containing natural products.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a state in which each layer (lower layer, middle layer, upper layer) of a multilayered antibacterial insol of the present invention is composed of a lower layer and an intermediate layer, It is shown virtually.

However, the multi-layered antimicrobial insole is composed of a foam sheet as a lower layer and an adsorbent on the surface thereof as an intermediate layer, so that when it comes in contact with moisture, moisture penetrates into the pores of the foam sheet, the functional ceramic and the adsorbent, Since the upper layer is coated with a natural product, the natural product tends to separate from the sheet due to friction with the foot.

In order to compensate for this disadvantage, it is preferable to form the upper and lower through holes after coating the prepared antibacterial insol with a melt in which the plasticized cellulose derivative is added to the same resin as the polymer resin used for preparing the lower layer natural resin mixed resin , The through hole may be formed by passing through the antibacterial insoles after the coated melt is sufficiently dried, and one or a plurality of through holes may be formed.

The plasticized cellulose derivative is obtained by substituting hydroxyl group (-OH) of cellulose by nitration, acetylation or etherification reaction to decrease the hydrogen bond. Hydrophilic hydroxyl group is changed into hydrophobic group and the water resistance and oil resistance of the melt The cellulose derivative is selected from the group consisting of methyl cellulose, ethyl cellulose, hydroxypropylmethyl cellulose, cellulose acetate and nitro cellulose. A species or two or more species can be selected.

The plasticizer may be added to the cellulose derivative to prepare a plasticized cellulose derivative. The solid cellulose may be solubilized by plasticization to be uniformly dispersed and mixed in the polymer resin. The plasticizer may be triacetine, One or more selected from the group consisting of triethylcitrate, dicyclohexyl phthalate, epoxidized soybean oil, and glycerol can be selected.

The mixing ratio of the plasticizer is preferably 95 to 99% by weight of the cellulose derivative and 1 to 5% by weight of the plasticizer, and if the plasticizer is less than 1% by weight, the solution of the cellulose derivative is not sufficiently dissolved, The cellulose particles are decomposed and the crystallinity is weakened, and the water resistance and oil resistance are lowered.

If the content of the plasticized cellulose derivative is less than 5% by weight, the water resistance and oil resistance of the antimicrobial insoluble resin are insufficient. When the plasticized cellulose derivative is more than 10% by weight, the viscosity of the melt increases. Lumps are easily formed on the surface during the coating operation, which makes it difficult to form a smooth surface.

By applying a melt having improved water resistance and oil resistance to the surface of the antibacterial insulator as described above, it is possible to obtain an effect of preventing moisture from entering into the pores of the foam sheet, the functional ceramics, and the adsorbent or preventing the natural product from being separated from the upper layer. The through-hole communicates with the outside of the antibacterial insole blocked by the coating film so that the adsorbing ability of the foam sheet, the functional ceramics, the adsorbent and the odor removing ability of the natural product can be exerted.

In other words, while walking on the shoe, the foot and the insole are repeatedly pressed and separated. When the foot is lifted, the foot and the insole are separated from each other and air containing foot odor, harmful substances and bacteria is filled in the through hole While the foot is stepped on the floor, the foot is in close contact with the insole so that the sole covers the through hole, and the foam sheet of the lower layer having elasticity is squeezed by the weight, and the air inside the through hole is pressed, It is pressurized and transferred to the inside of the insole to be removed.

As described above, the coating film that surrounds the outside of the antibacterial insoles can prevent moisture from being absorbed into the pores of the foam sheet, the functional ceramics, and the adsorbent, prevent the escape of the natural product, and the through hole can perform the antibacterial and deodorizing function of the antibacterial insoluble So that the efficacy of the multi-layered antibacterial insol of the present invention can be maintained for a long time.

Hereinafter, the present invention will be described in more detail with reference to the following examples, comparative examples and test examples.

It is to be understood, however, that the invention is not to be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Will be apparent to those skilled in the art to which the present invention pertains.

≪ Example 1 >

1 kg of Saururus chinensis extract, 2 ㎏ of Mugwort extract, 4 ㎏ of pine seeds, 3 ㎏ of sericite, 6 ㎏ of starch and 4 ㎏ of lactide resin were thoroughly mixed in an airtight mixer and 80 kg of ethylene vinyl acetate resin was driven at 110 캜 For about 20 minutes to prepare a natural resin mixed resin.

10 kg of calcium carbonate as a filler, 3 kg of stearic acid and 5 kg of zinc oxide were placed in a closed mixer and kneaded at 110 DEG C for about 20 minutes. Thereafter, 1 kg of dicumyl peroxide as a cross-linking agent, 0.5 kg of ethylene glycol dimethacrylate and 4 kg of an azodicarbonamide type foaming agent as a foaming agent were charged and sufficiently kneaded. The mixture was charged into a roll mill operated at a surface temperature of 95 캜 and foamed to prepare a 5 mm thick natural product- Was prepared and kept at room temperature for more than 24 hours.

Next, 100 kg of a 1.7 mm thick nonwoven fabric made of polyester short fibers containing 3% by weight of functional ceramics (zeolite, ilite and sericite) was mixed with an antibacterial binder natural liquid (chitosan and mugwort extract, Ethanol solution), 30 kg of coconut husk activated carbon was mixed and dried to prepare an active nonwoven web.

Next, a fabric composed of a polyester short fiber containing 10% by weight of functional ceramics (zeolite, ilite and sericite) and a cotton (short fiber: cotton = 2: 3 weight ratio) %) And dehydrated and dried to prepare an antimicrobial fiber sheet containing 0.6% by weight of chitosan and three-hundred-second-stage phase fraction.

In addition, an antibacterial binder containing natural products was prepared by dissolving 1 kg of Saururus chinense extract, 2 kg of mugwort extract, 1 kg of chitosan, 1 kg of zeolite, 1 kg of light and 1 kg of sericite, 3 kg of rosin and 3 kg of glue in 100 kg of ethanol .

The natural fiber-containing elastic foam sheet (lower layer), the active nonwoven fabric web (middle layer) and the antibacterial fiber sheet (upper layer) prepared as described above were cut into a cavity of a mold, and the lower layer, middle layer and upper layer were sequentially To prepare a multi-layered antimicrobial insulator containing natural substances.

≪ Example 2 >

2 kg of Saururus chinensis extract, 3 kg of mugwort extract, 2 kg of sericite, 4 kg of starch, 4 kg of lactide, 75 kg of ethylene vinyl acetate and 10 kg of ethylene propylene resin were mixed in a closed mixer at 110 캜 for about 20 minutes 10 kg of calcium carbonate, 3 kg of stearic acid, and 6 kg of zinc oxide were put into an airtight mixer and kneaded at 110 DEG C for about 20 minutes with 100 kg of the natural product mixed resin and the filler, 1 kg of ethylene glycol dimethacrylate as a crosslinking aid and 6 kg of azodicarbonamide type foaming agent as a foaming agent were added and kneaded sufficiently for about 10 minutes. This was kneaded in a roll mill operated at a surface temperature of 100 占 폚 And the foamed sheet was inserted and foamed to prepare a natural foamed elastic foam sheet having a thickness of 4.5 mm and kept at room temperature for more than 24 hours.

Layer antibacterial insole was prepared in the same manner as in Example 1 using the active nonwoven fabric web (middle layer) and the antibacterial fiber sheet (upper layer) of Example 1 with the natural material-containing elastic foam sheet as a lower layer.

≪ Example 3 >

In Example 2, 4.5 kg of mugwort extract was contained as a natural ingredient in the lower layer of the natural product mixed resin, and the upper layer of the blend fabric was immersed in an ethanol solution containing 1% by weight of chitosan extract, Fiber sheet was prepared and multilayered antibacterial insoles were prepared in the same manner as in Example 1 except that 4.5 kg of Mugwort extract was contained as a natural component of the natural antibacterial binder.

<Comparative Example>

In Example 1, an elastic foam sheet was prepared by mixing a polymer resin with a filler, a crosslinking agent, a crosslinking aid, and a foaming agent in an upper layer without using a natural product, and the lower layer was a fiber sheet made of a functional ceramic fabric, The multi-layered antibacterial insoles were prepared in the same manner as in Example 1.

&Lt; Test Example 1 > Performance evaluation

The antibacterial, antifungal, deodorizing and far-infrared radiation tests were carried out on the antibacterial inosols prepared in Examples 1 to 3 and Comparative Examples, and the results are shown in Table 1 below.

Performance evaluation result Example 1 Example 2 Example 3 Comparative Example Antibacterial test (%) ^{Note 1 )} > 99.9 > 99.9 > 99.9 43.7 Antifungal test ^{Note 2 )} ○ ○ ○ △ Deodorization test (%) ^{Note 3 )} 91.0 90.2 90.1 20.2 Far Infrared Test ^{Note 4 )} 0.912 /
3.70 x 10 ² 0.902 /
3.63 × 10 ² 0.898 / 3.58 × 10 ² 0.905 / 3.66 x 10 ² (1) Staphylococcus aureus ATCC 6538, (Strain 2) Escheichia coli ATCC 25922
- Test conditions: The test solution was incubated at 35 ± 1 ° C for 24 hours with shaking culture. The number of bacteria was measured (number of shakes: 150 times / min, sample surface area: 60 cm 2, nonionic surfactant type: TWEEN 80 (0.05% Phosphate buffer solution (pH 7.0 ± 0.2)}
- Inoculum concentration: (strain 1) 1.6 ± 0.1 × 10 ⁵ / ml, (strain 2) 1.4 ± 0.1 × 10 ⁵ / ml
- Growth rate: (strain 1) 45 times, (strain 2) 47 times
Note 2) - Fungus mixed strains: Aspergillus niger ATCC 9642, Penicillium pinophilum ATCC 11797, Chaetomium globosum ATCC 6205, Gliocldium virens ATCC 9645 and Aureobasidium pullulans ATCC 15233
- Test method: ASTM G-21 (2009)
- Test result: Whether or not the mycelium is growing in the inoculated part of the test piece for 1 to 4 weeks - Not recognized (∘), partially observed (△)
Note 3) Gas detection method (NH ₃ , 120 min)
Note 4) Far infrared ray emissivity (5 ~ 20 ㎛, 40 ℃) / Far infrared radiation energy (W / ㎡, 5-20 ㎛, 40 ℃)

Table 1 shows that antimicrobial activity, antifungal property and deodorization property were much better than those of Comparative Example by using natural products, functional ceramics and adsorbents in the insole.

Far infrared emissivity and radiant energy did not show any significant difference in each group. Far infrared radiation was expressed by ceramics, and in this test, there was no difference in the content of functional ceramics contained in the insole, .

As described above, the multi-layered antimicrobial insole containing the natural product of the present invention includes a natural product, a functional ceramic and an adsorbent, so that the comparative example including the functional ceramic and the adsorbent exhibits antibacterial and deodorizing properties. However, The antibacterial property and the deodorizing property of the antioxidant are complemented and the performance is further improved.

&Lt; Test Example 2 >

The antimicrobial insole prepared in Example 1 was immersed in a melt of 93 kg of an ethylene vinyl acetate resin and 7 kg of a plasticized cellulose derivative (a mixture of ethyl cellulose and triacetin in a weight ratio of 97: 3), and taken out, , And upper and lower through holes were formed at three intervals in the longitudinal direction of the antibacterial insulator at regular intervals.

The antimicrobial insoles having the through holes were attached to the inner bottom surface of the left shoe and the antibacterial insoles prepared in Example 1 were attached to the inner bottom surface of the right shoe for 1 month and then the antibacterial, Deodorization test was conducted, and the results are shown in Table 2 below.

Conduct evaluation result Antibacterial Insole with Through Hole Example 1 Antibacterial test (%) > 99.9 85.6 Antifungal test ○ ○ Deodorization test (%) 85.6 71.5

As a result of the above Table 2, the mycelial expression was not observed in the anti-fungal test, but the antibacterial insole formed with through holes in the antibacterial and deodorizing test showed better results than the Example 1.

In the case of Example 1, it is presumed that the water is not adsorbed in the pores of the foam sheet, the functional ceramics, and the adsorbent in the environment where the bacteria are liable to grow in light of the fact that the mycelium is not expressed in the antifungal test, And the deodorizing power was decreased from 91.0 (Test Example 1) to 71.5 after use after the production, and the natural product constituting the upper layer of the antibacterial insole was used in the use of the antibacterial insole It is judged as a result of being separated from the sheet by friction with the foot.

On the other hand, the antibacterial insole formed with the through hole showed> 99.9% after use, and the antibacterial activity was not lowered, and the deodorizing power was 85.6, which was superior to that in Example 1.

Claims (7)

A lower layer composed of an elastic foam sheet which supports the insole and foamed with a polymer resin mixed with natural materials and ceramics;
An intermediate layer disposed on the lower layer and composed of a nonwoven web in which a deodorant and an adsorbent are mixed with the ceramic-containing nonwoven fabric; And
An upper layer composed of an antibacterial fiber sheet containing natural products and ceramics, which is located on the upper layer of the middle layer, and which is bonded, compressed and formed by the antibacterial binder containing natural products,
Wherein the natural product is at least one selected from the group consisting of collagen, peptide, silk, elastin, chitin, chitosan, alginic acid, dextrin, sericin, papaya, safflower, ego,
The antimicrobial binder containing natural products is composed of 0.5 to 10.0% by weight of the natural product, 0.5 to 10.0% by weight of ceramic, 4 to 70% by weight of an adhesive and 10 to 95% by weight of a solvent. The method according to claim 1,
The lower layer is a foamed foam having a thickness of 1 to 10 mm which is foamed with 70 to 98% by weight of a natural resin mixed resin, 1 to 15% by weight of a filler, 0.3 to 3.0% by weight of a crosslinking agent, 0.2 to 2.0% by weight of a crosslinking assistant and 0.5 to 10.0% As a sheet,
Wherein the natural resin mixed resin comprises 1.5 to 15.0% by weight of a natural product, 0.5 to 10.0% by weight of a ceramic, and 75 to 98% by weight of a polymer resin. The method of claim 2,
Wherein the filler comprises 1 to 5% by weight of stearic acid or 1 to 10% by weight of zinc oxide in the elastic foam sheet, or both of them. The method according to claim 1,
Characterized in that the intermediate layer is a nonwoven web in which 0.5 to 5.0% by weight of an antibacterial binder containing a natural substance is applied to 45 to 95% by weight of a nonwoven fabric made of short fibers containing ceramics and 4.5 to 50.0% by weight of an adsorbent is mixed therein. Structure Antimicrobial Insole. The method according to claim 1,
Wherein the upper layer is an antibacterial fiber sheet in which 90.0 to 99.5% by weight of woven, knitted or nonwoven fabric made of short fibers including ceramics and 0.5 to 10.0% by weight of the natural product are mixed. The method according to claim 1,
Wherein the antibacterial insole is coated with a polymer resin melt containing 5 to 10% by weight of a plasticized cellulose derivative and has upper and lower through holes formed therein. The method of claim 6,
Wherein the plasticized cellulose derivative is obtained by substituting a hydroxyl group of a cellulose with a hydrophobic group and plasticizing the cellulose.

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