KR20230057145A - Foam composition for insole having hemp with enhanced deodorizing function - Google Patents

Abstract

The present invention relates to a foam composition for an insole containing hemp with an enhanced deodorizing function and, more specifically, to a foam composition for an insole containing hemp with an enhanced deodorizing function, which improves the dispersibility for the base material to improve deodorizing performance while maintaining the physical properties of the foam for the insole and also maintains the deodorizing property even when worn for a long time by containing the hemp, which is natural fiber, within the foam for the insole itself wherein the hemp is contained by performing surface-modification, optimizing the cut length and the cut surface shape thereof, and then manufacturing a master batch with RB (1,2 butadiene) and glass bubbles.

Description

Hemp-containing insole foam composition with improved deodorizing function {FOAM COMPOSITION FOR INSOLE HAVING HEMP WITH ENHANCED DEODORIZING FUNCTION}

The present invention relates to a foam composition for insole that can improve the deodorization of the foam for insole by including hemp, a natural fiber, in the foam for insole itself.

In general, insoles are manufactured using soft synthetic resin foam such as EVA (ethylene vinyl acetate) resin. It is one of the key parts of a shoe that absorbs secretions secreted from the feet, such as sweat, by covering the surface with a textile cover, etc., and performs functions such as optimizing the fit of the shoe.

On the other hand, because of the structural characteristics of shoes that cover the entire foot, the foot wrapped in the shoe is inevitably blocked from outside air, and since the shoe is worn for a long time, various bacteria are generated by sweat from the sole and foreign substances generated from the shoe. The odor is caused by a substance called isovaleric acid, which is produced as it grows.

In order to solve this problem, the odor is not fundamentally removed, but the odor is neutralized by adding an air freshener, but this rather causes the odor to be mixed with the smell of the air freshener, causing a more nasty odor.

Therefore, in Patent Documents 1 and 2, natural mugwort is mixed with 0.1 to 50% by weight in insoles for shoes such as various sneakers, shoes, and slippers, or natural An insole for shoes with a fabric made of textile attached and a slight perforation in the front part was presented.

However, in the prior art as described above, although some deodorizing functions can be implemented by the mugwort powder, the bonding force between the resin and the mugwort particles is weakened, resulting in a decrease in the physical properties of the insole, which causes the original function of the insole to be lost.

In addition, in Patent Document 3, an insole containing an extract of lacquer sap was proposed, and in Patent Document 4, an insole containing various herbal medicines having a deodorizing function was proposed. There was a problem that the function was deteriorated due to the etc.

In addition, in Patent Document 5, activated carbon powder bond is mixed with a fibrous nonwoven fabric or insole foam to absorb sweat generated from the feet and adsorb foot odor and harmful substances generated in shoes, and in Patent Document 6, biotite is mixed An insole with a deodorizing function was proposed by bonding fabric paper dyed with biotite to a shoe insole material using an adhesive.

However, when the insole contains minerals as described above, it is possible to obtain the effect by adsorbing the odor component at the beginning, but there is also a problem in that the function is not exhibited as the adsorption capacity decreases over time.

In contrast, the inventor of the present invention completed the present invention by deriving that there is a deodorizing function when hemp cob or stem powder is applied to a foam.

Patent Document 1: Korean Utility Model Registration No. 20-0259698 "Insole for shoes" Patent Document 2: Korean Utility Model Publication No. 20-1999-0001131 "shoe insole" Patent Document 3: Republic of Korea Patent Registration No. 10-0620874 "Functional shoe insoles with excellent antibacterial, deodorizing, deodorizing and far-infrared radiation capabilities" Patent Document 4: Republic of Korea Patent Publication No. 10-2002-0044123 "Herbal herbal composition for functional shoe insole and manufacturing method of shoe insole using the same" Patent Document 5: Republic of Korea Utility Model Publication No. 20-2012-0001338 "Functional shoe insole containing activated carbon non-woven fabric" Patent Document 6: Republic of Korea Patent Registration No. 10-1246649 "Functional shoe insole provided to absorb sweat and odor from feet"

The present invention is to solve the above problems, and contains hemp, a natural fiber, in the insole foam itself, surface-modifies the hemp, optimizes its cutting length and cutting surface shape, and then RB (1, 2 butadiene) and glass bubbles to improve the dispersibility to the substrate, thereby maintaining the physical properties of the insole foam and improving deodorization, as well as long-term wear It is an object to be able to maintain the deodorizing property even when

The present invention is a foam composition for an insole, characterized in that it is formed by mixing 10 to 20 parts by weight of a hemp master batch and additives for foam with respect to 100 parts by weight of EVA (ethylene vinyl acetate) resin. A foam composition for insole containing hemp with improved functions is used as a means to solve the problem.

In addition, the hemp masterbatch is a mixture of 10 to 20 parts by weight of glass bubbles having a particle size of 10 to 100 μm and 30 to 50 parts by weight of hemp based on 100 parts by weight of RB (1,2 butadiene) It is preferable to do so.

In addition, the hemp is used by surface modification with 3 to 10 parts by weight of a modifier based on 100 parts by weight of hemp, the modifier is vinyltriethoxysilane, vinyltrimethoxysilane or vinyltri (2-methoxysilane). It is preferably ethoxy)silane (Vinyltri(2-methoxyethoxy)silane).

In addition, the hemp is used after being cut to a length of 0.1 to 100 mm, and the shape of the cut surface is preferably polygonal, sawtooth or curved.

In the present invention, hemp, a natural fiber, is contained in the insole foam itself, but after surface modification of the hemp and optimization of its cutting length and cutting surface shape, RB (1,2 butadiene) and glass bubbles By preparing and containing a master batch together with, the deodorization property is improved while maintaining the physical properties of the insole foam by improving the dispersibility to the substrate, and the effect of maintaining the deodorization property even when worn for a long time there is

1 is a schematic view showing the shape of a cut surface of hemp applied to the present invention

The present invention to achieve the above effect relates to a hemp-containing insole foam composition with improved deodorizing function, and only parts necessary for understanding the technical configuration of the present invention are described, and the description of other parts distracts from the gist of the present invention. It should be noted that it will be omitted to avoid loss.

Hereinafter, the foam composition for insoles containing hemp with improved deodorizing function according to the present invention will be described in detail.

The foam composition for insoles containing hemp with improved deodorizing function according to the present invention is made by mixing 10 to 20 parts by weight of a hemp master batch and additives for foam with respect to 100 parts by weight of EVA (ethylene vinyl acetate) resin. to be characterized

Here, if the content of the hemp master batch is less than 10 parts by weight, there is a concern that the deodorizing performance improvement effect may be insufficient, and if it exceeds 20 parts by weight, there is a concern that the foam may not be properly produced.

On the other hand, the hemp master batch is based on 100 parts by weight of RB (1,2 butadiene), 10 to 20 parts by weight of glass bubbles having a particle size of 10 to 100 μm and hemp It is made by mixing 30 to 50 parts by weight.

The RB (1,2 butadiene) is added to improve the physical properties of the foam for insole and to function as a binder in a master batch.

And the glass bubbles (glass bubbles) are added to improve the dispersibility of the hemp (hemp) by the ball bearing effect as a spherical additive. Here, when the particle size of the glass bubbles is less than 10 μm, the dispersibility improvement effect may be insufficient, and when the particle size exceeds 100 μm, physical properties may deteriorate. In addition, when the amount of the glass bubbles is less than 10 parts by weight based on 100 parts by weight of RB (1,2 butadiene), there is a concern that the dispersing effect may be insufficient, and when it exceeds 20 parts by weight, physical properties are deteriorated There is a risk of deterioration.

In addition, when the hemp content is less than 30 parts by weight, there is a concern that the effect of improving the deodorizing performance may be insufficient, and when it exceeds 50 parts by weight, there is a concern that the foam may not be properly manufactured.

On the other hand, the hemp (hemp) is a modifier such as vinyltriethoxysilane, vinyltrimethoxysilane or vinyltri (2-methoxyethoxy) silane (Vinyltri (2-methoxyethoxy)silane) By applying after modifying the surface by using, dispersibility to the substrate can be further improved.

More specifically, the hemp is used by surface modification with 3 to 10 parts by weight of a modifier based on 100 parts by weight of hemp, and the modification method is to simply apply a modifier to hemp or use hemp as a modifier Various methods such as impregnating or spraying a modifier may be applied.

In addition, the hemp is cut to a length of 0.1 to 100 mm and used, and the shape of the cut surface is polygonal (a), sawtooth (b), or curved (c), such as a petal shape, as shown in FIG. ), it is possible to further improve the dispersibility to the substrate, the improvement of the physical properties of the foam, and the slip resistance.

Here, the shape of the cut surface of the hemp may be manufactured, processed, or molded by various methods known in the art, and the shapes (a, b, and c) may be formed in advance during manufacturing, processing, or molding. Alternatively, after manufacturing, processing, or shaping into a general cylindrical shape, the shape of the cutter or cutter blade may be adjusted to have the shape of the cut surface as described above.

In addition, conventional foam additives (eg, crosslinking agent, foaming agent, metal oxide, stearic acid, filler, accelerator, etc.) may be applied in addition to the above substrate and hemp master batch.

For example, based on 100 parts by weight of the substrate, 0.1 to 1.5 parts by weight of a sulfur crosslinking agent or organic peroxide crosslinking agent (Dicumyl peroxide, etc.) as a crosslinking agent, and 1 to 10 parts by weight of azodicarbonamide or the like as a foaming agent with respect to 100 parts by weight of the base material. Part, metal oxide is 1 to 5 parts by weight of zinc oxide, magnesium oxide, etc., stearic acid is 1 to 5 parts by weight, filler is calcium carbonate, magnesium carbonate ( 0.5 to 10 parts by weight of magnesium carbonate, titanium dioxide, silica, etc., and 0.1 to 0.5 parts by weight of triallylisocyanurate, mercaptobenzothiazole, etc. as an accelerator. The foam molding conditions are 150 ~ 200 ℃, 100 ~ 150kg / cm ² Conditions of molding for 5 to 20 minutes to produce a foam, but as described above, it is not limited thereto, and the use of the foam composition In response to the use environment, various types of foam additives already known can be applied according to the purpose, and the content thereof can also be used without limitation within the already known range. In addition, since the conditions for producing the foam composition are also variable depending on the use or use environment of the foam composition, various conditions that are already known can be applied without being limited to specific conditions.

Hereinafter, the present invention will be described in more detail based on the following examples, but the present invention is not limited by the examples.

1. Preparation of foam composition for insoles

(Example 1)

Based on 100 parts by weight of EVA (ethylene vinyl acetate) resin, hemp master batch 10 parts by weight, dicumyl peroxide crosslinking agent 1.5 parts by weight, stearic acid 0.7 parts by weight and zinc oxide Oxide) 2 parts by weight, Triallylisocyanurate (Triallylisocyanurate) accelerator 0.1 parts by weight, azodicarbonamide (Azodicarbonamide) foaming agent 4 parts by weight and sufficiently kneaded to prepare a kneaded material sheet, and then the sheet-like kneaded material was 170 ℃, 120kg / cm ² It was molded for 7 minutes under the conditions to prepare a foam.

Here, the hemp master batch is based on 100 parts by weight of RB (1,2 butadiene), 10 parts by weight of glass bubbles having a particle size of 10 μm and hemp (length 0.1 mm, shape of cut surface) Pentagram) 30 parts by weight was mixed, and the hemp was surface-modified by applying 3 parts by weight of vinyltriethoxysilane based on 100 parts by weight of hemp.

(Example 2)

Based on 100 parts by weight of EVA (ethylene vinyl acetate), hemp master batch 15 parts by weight, dicumyl peroxide crosslinking agent 1.5 parts by weight, stearic acid 0.7 parts by weight and zinc oxide ) 2 parts by weight, 0.1 part by weight of Triallylisocyanurate accelerator, and 4 parts by weight of azodicarbonamide foaming agent were added and sufficiently kneaded to prepare a kneaded material sheet, and then the sheet-like kneaded material was heated to 170 ° C. , and molded for 7 minutes under the condition of 120 kg/cm ² to prepare a foam.

Here, the hemp master batch is based on 100 parts by weight of RB (1,2 butadiene), 15 parts by weight of glass bubbles having a particle size of 50 μm and hemp (length 50 mm, sawtooth shape of the cut surface) Type) 40 parts by weight was mixed, and the hemp was surface-modified by applying 5 parts by weight of vinyltrimethoxysilane to 100 parts by weight of hemp.

(Example 3)

Based on 100 parts by weight of EVA (ethylene vinyl acetate), hemp master batch 20 parts by weight, dicumyl peroxide crosslinking agent 1.5 parts by weight, stearic acid 0.7 parts by weight and zinc oxide ) 2 parts by weight, 0.1 part by weight of Triallylisocyanurate accelerator, and 4 parts by weight of azodicarbonamide foaming agent were added and sufficiently kneaded to prepare a kneaded material sheet, and then the sheet-like kneaded material was heated to 170 ° C. , and molded for 7 minutes under the condition of 120 kg/cm ² to prepare a foam.

Here, the hemp master batch is based on 100 parts by weight of RB (1,2 butadiene), 20 parts by weight of glass bubbles having a particle size of 100 μm and hemp (length 100 mm, shape of cut surface It is made by mixing 50 parts by weight of a curved type), but the hemp is surface-modified by applying 10 parts by weight of vinyltri (2-methoxyethoxy)silane based on 100 parts by weight of hemp. used

(Comparative Example 1)

It was prepared in the same way as in Example 1, but the hemp master batch according to Example 1 was not added.

(Comparative Example 2)

It was prepared in the same way as in Example 2, but the hemp master batch according to Example 2 was not added.

(Comparative Example 3)

It was prepared in the same way as in Example 3, but the hemp master batch according to Example 3 was not added.

2. Evaluation of foam composition for insole

For the insole foams according to Examples and Comparative Examples, physical properties such as specific gravity, hardness, tensile strength and elongation, compression set, and deodorization were measured by the following methods, and the results are shown in [Table 1] below. .

(1) specific gravity

In accordance with KS M6519, it was measured using Model DMA-3, an automatic specific gravity measuring device manufactured by Ueshima.

(2) hardness

According to KS M6784, it was measured using an Asker C-type hardness tester.

(3) Tear strength and elongation

According to KS M6518, it was measured using a universal tester from Zwick.

(4) Permanent compression set

In accordance with ASTM D3754, a test piece prepared in the form of a cylinder with a thickness of about 10 mm and a diameter of 300 ± 5 mm is compressed by 50% of the thickness of the test piece, heat treated at 50 ± 0.1 ° C for about 6 hours, cooled at room temperature for 30 minutes, and then the thickness is measured. measured. Three specimens were used, and the average value was shown.

(5) Deodorizing

After taking 10 × 150mm specimens from the insole foam and putting them in each container, 500ppm of ammonia gas was injected to test the deodorization rate (test standard: KFIA-FI-1004). At this time, the short-term deodorization is the result of testing the deodorization rate after 2 hours, and the long-term deodorization is the result of testing the deodorization rate in the same way after wearing the insole foam for 30 days.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Specific Gravity (Sp.Gr.) 0.107 0.105 0.102 0.102 0.101 0.102 Hardness (Asker C) 36 36 35 35 36 36 Tensile strength (kg/cm ² ) 15 15 14 12 11 11 Elongation (%) 180 180 190 160 160 150 permanent compression set
(C/set, %) 59 57 59 63 65 68 Short-term deodorization rate (%) 99.9% 99.9% 99.9% 8.2% 7.9% 7.4% Long-term deodorization rate (%) 99.9% 99.9% 99.9% 3.8% 2.2% 4.3%

As shown in [Table 1], the foam for insole according to the embodiment of the present invention not only maintains the physical properties necessary for a normal insole and improves deodorization compared to the foam for insole according to the comparative example, but also improves deodorization when worn for a long time. It can be seen that the deodorizing property can be maintained even in the

As described above, the hemp-containing insole foam composition with improved deodorizing function according to the present invention has been described through the above preferred examples and its excellence has been confirmed. It will be understood that the present invention can be variously modified and changed without departing from the spirit and scope of the above.

Claims (4)

In the foam composition for insole,
A hemp-containing insole foam composition with improved deodorizing function, characterized in that it is formed by mixing 10 to 20 parts by weight of a hemp master batch and an additive for foam with respect to 100 parts by weight of an ethylene vinyl acetate (EVA) resin.
According to claim 1,
The hemp masterbatch,
Characterized by mixing 10 to 20 parts by weight of glass bubbles having a particle size of 10 to 100 μm and 30 to 50 parts by weight of hemp with respect to 100 parts by weight of RB (1,2 butadiene), A foam composition for insoles containing hemp with improved deodorizing function.
According to claim 2,
The hemp,
It is used by surface modification with 3 to 10 parts by weight of a modifier based on 100 parts by weight of hemp, but the modifier is vinyltriethoxysilane, vinyltrimethoxysilane or vinyltri(2-methoxyethoxy)silane ( A hemp-containing insole foam composition with improved deodorizing function, characterized in that it is Vinyltri(2-methoxyethoxy)silane.
According to claim 2,
The hemp,
A hemp-containing insole foam composition with improved deodorizing function, characterized in that it is cut and used in a length of 0.1 to 100 mm, and the shape of the cut surface is polygonal, sawtooth or curved.

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