KR20160124616A - Non-slip rubber outsole using the polybutene - Google Patents

Abstract

The present invention relates to a non-slip rubber outsole using polybutene that is capable of having wear resistance and improving the non-slip performance of the outsole coupled with the bottom portion of the outer part of a shoe. A sole is made up of 5 to 30 wt% of polybutene mixed with 50 to 93 wt% of a base material formed of acrylonitrile-butadiene rubber (NBR) and 2 to 20 wt% of a mixture containing a filling agent, a cross-linking agent, and a foaming agent in the base material. According to the present invention, the non-slip performance and wear resistance can be improved, and thus the present invention can be applied to mountain climbing shoes and working shoes requiring wear resistance as well as the outsoles of sports climbing shoes.

Description

[0001] The present invention relates to a non-slip rubber outsole using the polybutene,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a non-slip rubber outsole using polybutene, and more particularly, to a non-slip rubber outsole using polybutene that improves non-slip property and wear resistance of an outsole .

The importance of non-slip outsoles is becoming increasingly important due to the increase in the leisure population due to the health and well-being boom in recent years. Especially, in the leisure and climbing activities, The function of which is insensible enough to be expressed, and is an important factor in assuring the safety of the climber.

In addition, due to the development of the industry, various work environments are created. Therefore, when the road surface of the business is slippery, there is a possibility of serious injury to the human body if the slip prevention function is insufficient. In the case of the floor always wet or slippery, This is very important.

These general shoes include an outer shell constituting an upper portion and an outsole coupled to a bottom portion of the outer shell to form a bottom surface of the shoe. Here, the outsole is a portion directly contacting the floor, and is formed of a rubber material in consideration of shock absorption and durability.

In recent years, many companies have been developing slip-outsol in order to compete with the development of isobutylene-isoprene rubber (IIR), and some of them have been developed and applied to products have.

As for the prior art as described above, Patent Document 10-2005-0008621 (Nanosleep butyl rubber outsole and its manufacturing method, published on Jan. 21, 2005) relates to improvement of non-slip property, Discloses an anti-slip butyl rubber outsole which is produced by using water as a base material and heating at a mold temperature of 160 to 170 占 폚, which is a conventional manufacturing method, for 3 minutes to 10 minutes to perform crosslinking and foaming, and a production method thereof.

As mentioned above, butyl rubber is known to have excellent non-slip function for slip outsole, and most companies use butyl rubber. However, to date, butyl rubber has not been technically solved due to its weakness in abrasion.

As a result of the increase in the use of outsole mixed with butyl rubber as one of the reasons for the recent expansion of the outsole market, it has been found that such vulcanized rubber materials of butyl rubber have poor mechanical strength or poor adhesion Durability and abrasion resistance are low, and since the production time is about 10 to 20 minutes in the crosslinking and foaming process, the productivity is low and there are restrictions on the use.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a polybutene (polybutene) resin for a substrate of an acrylonitrile-butadiene rubber ), A filler, a crosslinking agent and a foaming agent, thereby providing a non-slip rubber outsole using polybutene which can further improve the wear resistance function while having physical properties close to the non-slip function of the butyl rubber The purpose.

By adding the metallic powder or the ceramic powder as the filler to be added in an average particle size of 100 to 400 mesh, it is possible to improve the non-slip property in the base material and to prevent the filler from falling out from the outside of the outsole when wearing shoes for a long time And to provide a non-slip rubber outsole using polybutene which can maintain excellent durability continuously.

To achieve the above object, according to the present invention, there is provided a shoe comprising a shroud and an outsole coupled to a bottom of the shroud, wherein the shoe comprises a substrate made of acrylonitrile-butadiene rubber (NBR) To 93% by weight of polybutene and 5 to 30% by weight of polybutene, and 2 to 20% by weight of a kneaded material containing a filler, a crosslinking agent and a foaming agent.

The filler may be a metallic powder, a ceramic powder, or a mixture thereof.

The metallic powder may be at least one selected from among aluminum, steel, stainless steel, rare earth, and titanium, and the ceramic powder may be at least one selected from alumina, silicon carbide, carbon black, zirconia, .

The metallic powder or ceramic powder is spherical and has an average particle size of 100 to 400 mesh.

According to the present invention, in order to compensate for the disadvantages of abrasion resistance while maintaining the non-slip advantage of the conventional butyl rubber outsole, research has been conducted to find that the addition of polybutene to acrylonitrile-butadiene rubber It is possible to improve slipperiness as much as possible.

In addition, by adding a filler of metallic powder or ceramic powder, it has excellent non-slip property even in mountain climates, work sites, and special work sites such as various oils and detergents, so that not only safety is excellent but also kneaded kneaded products are injected into the injection machine And then subjected to a crosslinking reaction and a decomposition reaction of the foaming agent to maximize the non-slip property and the abrasion resistance, so that not only a rock outsole that requires the most non-slip property but also a wide range There is an advantage that can be applied to.

Hereinafter, the non-slip rubber outsole using polybutene according to the present invention will be described in more detail as follows.

The present invention relates to a shoe comprising a shroud and an outsole coupled to the bottom of the shroud, wherein the outsole comprises 50 to 93% by weight of a substrate made of acrylonitrile-butadiene rubber (NBR) And 2 to 20% by weight of a kneaded material containing a filler, a crosslinking agent and a foaming agent.

The present invention can be applied to a general rubber base material and all kinds of shoe made of various rubber additives. The base material of the outsole according to the present invention includes a substrate having an anti-slip property and other additives.

The acrylonitrile-butadiene rubber (NBR) used as the base in the present invention has particularly excellent oil resistance, heat resistance and abrasion resistance, and particularly has an anti-slip property even in oil. The acrylonitrile-butadiene rubber % Is preferably used.

The polybutene used in the present invention has a molecular weight of 300, 450, 680, 950, 1300, 1400, 2000 and 2400, preferably 5 to 30% by weight, By weight and polybutene is used in an amount of 5 to 15% by weight.

If the acrylonitrile-butadiene rubber and the polybutene are out of the above-mentioned range of use, they may not have sufficient oil resistance and non-slip property at a special site using oil or may not have proper elasticity. Therefore, It would be preferable to use it within the above-mentioned use range.

The filler used in the present invention may be a metallic powder, a ceramic powder, or a mixture thereof. A small amount of a colorant may be added to express the color of the kneaded product.

The metallic powder may be at least one selected from the group consisting of aluminum, steel, stainless steel, rare earth, and titanium. The ceramic powder may be at least one selected from alumina, silicon carbide, carbon black, zirconia, .

In addition, the metallic powder or ceramic powder is spherical and preferably has an average particle size of 100 to 400 mesh. When the average particle size is less than 100 mesh, the particle size is too small to be fixed and may not be released or non-slip effect. When the particle size exceeds 300 mesh, the slip effect is increased but other properties are lowered. There is a fear of feeling foreign body. More preferably, it is preferable to use a material having a mesh size of 200 to 300 which can improve the slip effect while minimizing changes in physical properties.

Here, in the method for manufacturing a non-slip rubber outsole using polybutene according to a preferred embodiment of the present invention, a kneaded product obtained by adding a filler, a crosslinking agent and a foaming agent to the base material is injected into a rubber molding machine, And crosslinking and foaming are carried out while heating at a temperature of from 140 to 140 占 폚 for 5 minutes to 7 minutes.

Here, if the mold temperature is less than 130 degrees or the processing time is less than 5 minutes, sufficient decomposition of the crosslinking agent and the foaming agent can not occur. If the mold temperature exceeds 140 degrees or the processing time is 7 minutes or more, Shaped foam can be obtained, and it is preferable to perform it within the above-mentioned range.

The kneading of the present invention can be carried out using a conventional kneading machine. The rubber molding machine can be formed into a predetermined shape by a conventional rubber molding machine such as a roll, a compression molding machine, an extrusion molding machine or an injection molding machine.

Hereinafter, the present invention will be described based on the results of measurement of physical properties of the specimens of the following examples and comparative examples. However, these do not limit the technical scope of the present invention.

[Example 1]

A blend of a filler and a crosslinking agent comprising 20,000 g of an acrylonitrile-butadiene rubber base, 2400 g of polybutene 2400, 600 g of ST / A, 200 g of MGO, 150 g of DM, 640 g of DM and 50 g of C / The injection was heated at a mold temperature of 130 to 140 占 폚 for 5 minutes to 7 minutes and crosslinked and foamed to prepare a polybutene outsole specimen.

[Example 2]

A kneaded mixture of filler and crosslinking agent including 20,000 g of acrylonitrile-butadiene rubber base material, 4800 g of polybutene 2400, 600 g of ST / A, 200 g of MGO, 150 g of DM, 640 g of DM and 70 g of C / The injection was heated at a mold temperature of 130 to 140 占 폚 for 5 minutes to 7 minutes and crosslinked and foamed to prepare a polybutene outsole specimen.

(Comparative Example 1)

A kneaded mixture of 20,000 g of butyl rubber (IIR) base material, 2400 g of polybutene 2400, 600 g of ST / A, 200 g of MGO, 150 g of DM, 640 g of DM and 50 g of C / And crosslinked and foamed at a temperature of 160 ° C to 170 ° C for 3 minutes to 10 minutes to prepare an outsole.

Item Comparative Example 1 Example 1 Example 2 Butyl rubber IIR 100 NBR 2400 NBR 2400 Polybutene (PB) 10 wt% 10 wt% 20 wt% Carbon black 50 50 70 Plasticizer 1.8-1.9 1.8-1.9 1.8-1.9 Hardness (shore-A) 72 80 85 Tensile (MPa) 9.6 13.6 15.6 Elongation (%) 720 339 260 Tear strength (N / mm) 39.27 47.7 61.5 The wear rate (NBS) 48 155 797 Slip property (slip angle / coefficient of friction) 49 / 1.15 45 / 1.01 42 / 1.03

Comparative Example 1: General black butyl rubber outsole product

Example 1: A black NBR outsole product containing 10 wt% of polybutene according to the present invention

Example 2: Black NBR outsole product containing 20 wt% of polybutene according to the present invention

Comparing Example 1 and Example 2 with Comparative Example 1, the addition of polybutene to the acrylonitrile-butadiene rubber according to the present invention makes it possible to improve the tensile strength, tear strength and wear resistance of the butyl rubber, It can be seen that the damage was not great.

Claims (4)

A shoe comprising an outer shell and an outsole coupled to the outer shell bottom,
The outsole comprises 50 to 93% by weight of a substrate made of acrylonitrile-butadiene rubber (NBR), 5 to 30% by weight of polybutene, 2 to 20% by weight of a kneaded material containing a filler, By weight based on the total weight of the non-slip rubber outsole.
The method according to claim 1,
Wherein the filler is a metallic powder or a ceramic powder or a mixture thereof.
3. The method of claim 2,
The metallic powder may be at least one selected from aluminum, steel, stainless steel, rare earth, and titanium. The ceramic powder may be selected from alumina, silicon carbide, carbon black, zirconia, Non-slip rubber outsole using polybutene.
3. The method according to claim 2 or 3,
Wherein the metallic powder or ceramic powder is spherical and has an average particle size of 100 to 400 mesh.