KR20130021174A - Superadsorbent resin composition for shoes inner pad and the shoes inner pad which was produced using it - Google Patents

Abstract

PURPOSE: A high absorbent resin composition for a shoe insole and the shoe insole using the same are provided to prevent the discomfort of others by improving sweat absorption. CONSTITUTION: A high absorbent resin composition for a shoe insole comprises 5-30 wt% of high absorbent polymer, 50-100 wt% of inorganic filler, and 1-10 wt% of vulcanizing agent against 100wt% of foaming resin. The foaming resin is one or two kinds of mixture selected from silicone rubber, silicone foamed rubber, thermoplastic elastomer, urethane foam, ethylene vinyl acetate foam, natural rubber, natural rubber foam, ethylene propylene diene monomer rubber, chloroprene rubber, latex, acrylonitrile butadiene rubber, butyl rubber, and PVC. [Reference numerals] (AA) Foaming resin; (BB) High absorbent polymer; (CC) Adding vulcanizing agent and inorganic additive; (S10) Homogeneous mixing; (S20) Melting; (S30) Shaping and solidifying; (S40) Bonding; (S50) Cutting

Description

Superabsorbent resin composition for shoes inner pad and the shoes inner pad which was produced using it}

The present invention relates to a shoe insole composition and to a shoe insole using the same, and more particularly, to a super absorbent polymer composition for shoe insoles and a shoe insole using a mixture of a superabsorbent polymer and additives in a foaming resin.

In general, the shoe insole is a component of the shoe that is directly attached to the sole of the wearer to be in contact with the sole of the wearer, even if the shoe is worn for a long time should be manufactured to be comfortable while minimizing the fatigue of the foot caused by walking. The shoe insole is made of a cushioning material so that the shape is made in accordance with the shape of the bottom surface of the shoe, and the wearer can feel comfortable while walking and reduce fatigue.

However, in the case of shoes such as sneakers, the cushioning material itself is warm, so when the user walks for a long time wearing such shoes, heat is generated and accumulated on the bottom of the shoe, and the generated heat is not easily released, so the shoes are taken off. In case an unpleasant foot odor is generated. In addition, there is a problem that various bacterial foot disease is caused by the sweat generated in the foot. Therefore, in hot weather, as well as silk sneakers, various shoes are very burdened when wearing shoes due to the above problems.

In the related art, in order to solve the above problem, a large number of holes are formed in the shoe insole for air circulation to cool the heat. However, such a conventional shoe insole is not a fundamental solution to cool the internal heat or to prevent foot odor because the air circulation is not made at all inside the shoe.

In order to solve the above problems, a shoe insole made of coconut fiber excellent in sweat absorption, breathability, and deodorizing effect has been registered as Utility Model Registration No. 221861. Coconut fiber, which is used as a material for shoe insoles, is already widely applied to products requiring cushions, such as bed mattresses, because it has excellent breathability, excellent far-infrared radiation, deodorization, and antibacterial effect. "Shoe insole with coconut" disclosed in heading 21.26 is also a product using commercially available coconut fiber.

Looking at the pre-registration of the design, it is a sole type of a flat plate made by press-cutting to have a bottom surface shape inside the shoe by adhesively bonding the fiber fabric to one side of the coconut fiber disc made of a thin thickness.

The shoe insole manufactured as described above is excellent in absorbing sweat, breathable and deodorizing effect, while the thickness is so thick that it is inconvenient to be put on the sole of the shoe, When worn, the space inside the shoe is narrowed due to the shoe insole, resulting in a lowering of the wearing comfort, thereby causing a problem of easily feeling fatigue during walking.

In addition, the shoe insole is a combination of coconut fibers made to be applied to a variety of items (universal) to the shoe insole without post processing (post processing), so that the coconut fibers made by intertwining the coconut fiber strands are easily split (cracked) It was difficult to secure the reliability of shoe insoles because there were many problems such as durability. In addition, those who sweat a lot due to the weak absorption of sweat caused by athlete's foot, eczema, foot smell, etc. Not only the user's discomfort, but also damage to the people around, so many difficulties in social life. And in the winter there was a risk that could lead to dangerous accidents such as frostbite.

Accordingly, in the present invention, to solve the above-mentioned conventional problems, the superabsorbent polymer is mixed with the resin and / or the expandable resin, and the inorganic additives having excellent water absorption ability are added to the water-foil mixture to sweat. The problem is to provide a high-absorbent composition for shoe insoles and shoe insoles manufactured using the same as well as the user's discomfort to increase the absorption of the user does not cause secondary damage to the surrounding people.

The super absorbent polymer composition for shoe insole according to the present invention which solves the above problems comprises 5 to 30 parts by weight of superabsorbent polymer, 50 to 100 parts by weight of inorganic filler and 1 to 10 parts by weight of vulcanizing agent based on 100 parts by weight of the foamable resin. Is done.

Here, the foamable resin is silicone rubber, silicone foam rubber, thermo plastic elastomer, polyurethane foam, EVA (Ethylene Vinyl Acetate) foam, natural rubber (NR), natural rubber foam, ethylene propylene diene monomer (Ethylene) Propylene Diene Monomer) rubber, chloroprene rubber (CR; Chloroprene Rubber), latex, acrylonitrile-butadiene rubber (NBR), butyl rubber, characterized in that it is a mixture of one or two or more selected from the group consisting of PVC.

Herein, the superabsorbent polymer is a polyacrylic acid polymer, a polyacrylic acid-starch graft polymer obtained by graft polymerization of starch to polyacrylic acid, a polyacrylic acid-polyvinylalcohol graft polymer, and a sodium carboxymethyl cellulose ( Sodium carboxy methycellulose), a grafted polymer of polyacrylic acid and natural polymer, and a mixture of polyacrylic acid and polyvinylamine.

Here, the inorganic filler is characterized in that the bentonite or sodium bentonite.

Here, the vulcanizing agent is any one selected from the group consisting of dibenzothiazyl disulfide (DM), tetramethyl thiuram disulfide (TT), dipentamethylene thiuram tetrasulfite (TRA), sulfur, amines It is done.

Here, 0.5 to 10 parts by weight of the antibacterial deodorant is further mixed with respect to 100 parts by weight of the resin composition.

Here, the antibacterial deodorant is characterized in that any one selected from the group consisting of titanium oxide, silver nano, zeolite, elvan, inorganic mineral antibacterial deodorant.

In addition, the present invention provides a super absorbent shoe insole manufactured by forming the superabsorbent composition for shoe insole disclosed in the present invention.

Here, the shoe insole is heated and pressurized in a molding machine to melt the resin composition, which is added by adding an inorganic additive and a vulcanizing agent to a mixture of a superabsorbent polymer and a resin and / or foaming resin to have a certain thickness. Molded and solidified in the shape of a pad, the fabric is added to one surface of the solidified pad, and finished by cutting with a cutting machine.

At this time, the resin composition includes 5 to 30 parts by weight of the super absorbent polymer, 50 to 100 parts by weight of the inorganic filler, and 1 to 10 parts by weight of the vulcanizing agent based on 100 parts by weight of the expandable resin.

Here, the melting temperature of the resin composition is made in an environment of 80 ~ 180 ℃, the thickness of the pad is made of 1.5 ~ 4.5mm.

The shoe insole composition provided in the present invention maintains high absorbency by adding an inorganic additive and a super absorbent polymer having excellent water absorption, and maintains comfort by relieving the discomfort of the user by increasing sweat absorption, as well as discharged sweat. Due to the odor caused by the surrounding people do not cause secondary damage.

1 is a block diagram illustrating a method of manufacturing a super absorbent shoe insole according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

The present invention relates to a super absorbent polymer composition for footwear insoles by mixing a superabsorbent polymer having excellent water absorption property with bentonite or sodium bentonite, which is a natural inorganic material, to a resin and / or a foamable resin.

The super absorbent polymer composition for shoe insoles according to the present invention comprises 5 to 30 parts by weight of superabsorbent polymer, 50 to 100 parts by weight of inorganic filler and 1 to 10 parts by weight of vulcanizing agent based on 100 parts by weight of the foamable resin.

The foamable resin may be silicone rubber, silicone foam rubber, thermo plastic elastomer, urethane foam, EVA (Ethylene Vinyl Acetate) foam, natural rubber (NR), natural rubber foam, ethylene propylene diene monomer (Ethylene Propylene Diene) Monomer) rubber, chloroprene rubber (CR; Chloroprene Rubber), latex, acrylonitrile-butadiene rubber (NBR), or a mixture of one or more selected from the group consisting of butyl rubber.

The superabsorbent polymer constituting the present invention is a polyacrylic acid polymer, a polyacrylic acid-starch graft polymer obtained by graft polymerization of starch to polyacrylic acid, a polyacrylic acid-polyvinylalcohol graft polymer, sodium carboxy Any one selected from the group consisting of methyl cellulose (sodium carboxy methycellulose), polyacrylic acid and natural polymer graft polymer, a mixture of polyacrylic acid and polyvinylamine, and more preferably polyacrylic acid polymer (sodium polyacrylate) Is recommended.

The amount of the superabsorbent polymer to be mixed is 5 to 30 parts by weight of the superabsorbent polymer with respect to 100 parts by weight of the expandable resin, and preferably 10 to 25 parts by weight. If the mixing amount of the polymer is less than 5 parts by weight, it is difficult to obtain satisfactory water absorption. If the mixing amount exceeds 30 parts by weight, the physical properties of the resin may deteriorate.

The inorganic filler constituting the present invention uses any one of bentonite or sodium bentonite. Bentonite is preferably used, and more preferably bentonite having an average particle size of 150 to 200 mesh is used.

The amount of the inorganic filler is mixed 50 to 100 parts by weight of the inorganic filler with respect to 100 parts by weight of the resin and the expandable resin. More preferably, the mixture is 50 to 80 parts by weight. When the mixing amount of the inorganic filler is less than 50 parts by weight, although a certain amount of water absorption can be obtained due to the material properties to some extent, it is difficult to obtain a satisfactory water absorption rate that is desired in the present invention. The water absorption rate is too high to cause a sudden expansion and the problem of losing the role as a shoe insole occurs, rather it can increase the inconvenience of the user.

The vulcanizing agent constituting the present invention uses any one selected from the group consisting of DM, TT, TRA, sulfur, and amines, and the mixing amount is 1 to 10 parts by weight based on 100 parts by weight of the resin and the expandable resin. . If the mixing amount of the vulcanizing agent is used in less than 1 part by weight, there is a problem in the vulcanization temperature and the vulcanization time, when used in excess of 10 parts by weight there is a risk of scorch in storage.

The vulcanizing agent not only lowers the vulcanization temperature and shortens the vulcanization time of the resin composition of the present invention, but also improves the physical properties of the vulcanized product.

According to the present invention, an antibacterial deodorant may be further added to the above-described resin composition to increase the antibacterial deodorizing power. The antimicrobial deodorant may be added as long as it is harmless to the human body within the scope of not impairing the present invention, preferably the antimicrobial deodorant in the group consisting of titanium oxide (TiO 2), silver nano, zeolite, elvan, loess It may be any one selected or a mixture of two or more selected thereof, and more preferably to use a finely divided state having a nano-sized particle size. More preferably, those having a particle size of 10 nm or less are used. More preferably, these antimicrobial deodorants are added in an aqueous solution and mixed.

Preferably the addition amount of the said antibacterial deodorant mixes 0.5-10 weight part with respect to 100 weight part of resin compositions of this invention disclosed above, More preferably, it adds 0.5-5 weight part. If it is added below the minimum value, it is difficult to obtain satisfactory antimicrobial deodorizing power of the added antimicrobial deodorant. If it is added above the maximum value, the antimicrobial deodorizing power is excellent, but it may cause the inhibition of water absorption. The increase of may cause a decrease in productivity.

By further adding the antibacterial deodorant, it is possible to solve the difficulty of the complete deodorization and antibacterial treatment only by absorbency.

On the other hand, the present invention is to provide a molded superabsorbent shoe insole using the resin composition of the present invention disclosed above.

Referring to the accompanying drawings, the manufacturing method of the super absorbent shoe insole using the resin composition disclosed in the present invention,

First, the superabsorbent polymer is added to the resin and / or the expandable resin in a melter for homogeneous mixing, and the inorganic additive and the vulcanizing agent are sequentially added and blended in the mixing process (S10).

The blended composition is melted by maintaining a proper temperature to form a melt (S20), and the melt is put into a molding machine and heated and pressurized to form and solidify in a pad shape to have a predetermined thickness. (S30)

After adding the fabric on one surface of the solidified pad (S40), it is completed by cutting (S50) with a cutting machine.

At this time, the composition comprises 10 to 30 parts by weight of the super absorbent polymer, 50 to 100 parts by weight of the inorganic filler and 1 to 10 parts by weight of the vulcanizing agent based on 100 parts by weight of the resin and the expandable resin.

Here, the melting temperature at the time of melting the composition is preferably made in 80 ~ 180 ℃ environment, the molding thickness of the pad is preferably molded to be 1.5 ~ 4.5mm.

The reason for limiting the thickness of the molding pad may be a problem that it is difficult to obtain sufficient water absorption power if less than 1.5mm, and if it exceeds 4.5mm, sufficient water absorption power may be maintained, but the user's feeling of wearing decreases. There can be. That is, the thickness of the insole may be manufactured to exceed 4.5mm as needed, but it is limited to 4.5mm with a thickness capable of maintaining the most optimal fit while having sufficient water absorption.

According to the present invention, an antibacterial deodorant may be further added to the above-described resin composition to increase the antibacterial deodorizing power. The antimicrobial deodorant may be added as long as it is harmless to the human body within the scope of not impairing the present invention, preferably the antimicrobial deodorant in the group consisting of titanium oxide (TiO 2), silver nano, zeolite, elvan, loess It may be any one selected or a mixture of two or more selected from them, and more preferably to use a finely divided state having a nano-sized particle size.

Preferably the addition amount of the said antibacterial deodorant mixes 0.5-10 weight part with respect to 100 weight part of resin compositions of this invention disclosed above, More preferably, it adds 0.5-5 weight part. If it is added below the minimum value, it is difficult to obtain satisfactory antimicrobial deodorizing power of the added antimicrobial deodorant. If it is added above the maximum value, the antimicrobial deodorizing power is excellent, but it may cause the inhibition of water absorption. The increase of may cause a decrease in productivity.

The superabsorbent polymer composition for shoe insoles according to the present invention described above is mixed in the ratio shown in Table 1 below to prepare a mixture, and the mixture is melted in a melter at a melting temperature of 120 ° C., and the melted melt is formed in a molding machine. It was prepared by preparing a specimen by attaching a conventional shoe insole manufacturing cloth to one side by molding into a plate pad having a thickness of 2.5 mm, width × length = 300 × 300 (mm).

Measure the weight (W0) of the specimen prepared as described above, put the specimen in a container filled with 1 liter of water, immerse for 10 minutes, and then take out and wipe off the moisture on the surface, the weight (W1) was measured Next, the water absorption was measured by the method of obtaining the difference of W0 before absorption from the weight W1 after the water absorption, and the absorption amount (cutting off the decimal point or less) was measured according to Equation 1 below, and the water absorption rate was expressed by Equation 2 below. Was calculated. The results are shown in Table 1 below.

Water absorption = W1-W0 ------------- (Equation 1)

Water absorption rate = (W1-W0) / W0 * 100 ------------ (Equation 2)

division Rubber
(g) Bentonite
(g) Super Absorbent Polymer
(g) Vulcanizing agent
(g) Water absorption
(g) Water absorption
(%) Composition 1 100 50 5 One 60 38.46 Composition 2 100 50 10 One 130 80.75 Composition 3 100 50 15 One 190 114.45 Composition 4 100 50 20 One 260 152.04 Composition 5 100 50 25 One 380 215.90 Composition 6 100 80 5 5 84 44.21 Composition 7 100 80 10 5 156 80.00 Composition 8 100 80 15 5 234 117.00 Composition 9 100 80 20 5 308 150.24 Composition 10 100 80 25 5 418 199.04 1 150 - - - 0 0 Compared to 2 150 - - - 0 0

EPDM was used for the rubber used in Compositions 1 to 5 in Table 1, and NBR was used for Compositions 6 to 10. Polyacrylic acid polymer was used as the super absorbent polymer and TT was used as the vulcanizing agent.

In Table 1, EPDM alone was used as Comparative Example 1, and NBR alone was used as Comparative Example 2, which was processed into a pad.

As a result of Table 1, it can be seen that the water absorbing power of the pads prepared with the shoe insole composition of the present invention has significantly superior water absorbing power when compared to the pads of the comparative objects 1 and 2. Therefore, as a result, the shoe insole made of the composition of the present invention is excellent in the sweat absorbing power discharged from the user's body to maintain the user comfort.

Claims (11)

A super absorbent polymer resin composition for shoe insoles comprising 5 to 30 parts by weight of superabsorbent polymer, 50 to 100 parts by weight of inorganic filler, and 1 to 10 parts by weight of vulcanizing agent based on 100 parts by weight of foamable resin.
The method of claim 1,
The foamable resin may be silicone rubber, silicone foam rubber, thermo plastic elastomer, urethane foam, EVA (Ethylene Vinyl Acetate) foam, natural rubber (NR), natural rubber foam, ethylene propylene diene monomer (Ethylene Propylene Diene) Monomer) rubber, chloroprene rubber (CR; Chloroprene Rubber), latex, acrylonitrile-butadiene rubber (NBR), butyl rubber, a mixture of one or two or more selected from the group consisting of PVC Superabsorbent resin composition.
The method of claim 1,
The superabsorbent polymer is a polyacrylic acid polymer, a polyacrylic acid-starch graft polymer obtained by graft polymerization of starch to polyacrylic acid, a polyacrylic acid-polyvinylalcohol graft polymer, and sodium carboxymethyl cellulose. methycellulose), a graft polymer of polyacrylic acid and natural polymer, a super absorbent polymer composition for shoe insoles, characterized in that any one selected from the group consisting of polyacrylic acid and polyvinylamine.
The method of claim 1,
The inorganic filler is a shoe absorbent super absorbent resin composition, characterized in that the bentonite or sodium bentonite.
The method of claim 1,
The vulcanizing agent is any one selected from the group consisting of dibenzothiazyl disulfide (DM), tetramethyl thiuram disulfide (TT), dipentamethylene thiuram tetrasulfite (TRA), sulfur, and amines. Super absorbent polymer composition for shoe insoles.
The method of claim 1,
A super absorbent polymer composition for shoe insoles, characterized in that 0.5 to 10 parts by weight of the antimicrobial deodorant is further mixed with respect to 100 parts by weight of the resin composition.
The method according to claim 6,
The antimicrobial deodorant is a shoe absorbent super absorbent resin composition, characterized in that any one selected from the group consisting of titanium oxide, silver nano, zeolite, ganban stone, inorganic antibacterial deodorant.
A superabsorbent shoe insole made of a resin composition according to any one of claims 1 to 7 and molded into a predetermined shape.
The melt obtained by extruding or melting the resin composition obtained by adding an inorganic additive and a vulcanizing agent to a mixture of a super absorbent polymer mixed with a resin and a foamable resin is heated and pressurized in a molding machine and molded and solidified into a pad shape to have a predetermined thickness. The method of manufacturing a super absorbent shoe insole, characterized in that the step of cutting the fabric on one side of the solidified pad, then cutting with a cutting machine.
The method of claim 9,
The resin composition is a method for producing a super absorbent shoe insole, characterized in that it comprises 5 to 30 parts by weight of superabsorbent polymer, 50 to 100 parts by weight of inorganic filler and 1 to 10 parts by weight of vulcanizing agent based on 100 parts by weight of the foamable resin.
The method of claim 9,
Melting temperature of the resin composition is made under an environment of 80 ~ 180 ℃, the thickness of the pad is a manufacturing method of the super absorbent shoe insole, characterized in that formed in 1.5 ~ 4.5mm.

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