KR102431209B1 - Manufacturing method for dustproof shoe with rubber sole of low specific gravity - Google Patents

Abstract

The present invention relates to a dustproof manufacturing method provided with a low specific gravity rubber sole, and is provided with conductive rubber instead of a conventional polyurethane (PU) sole. will be.
The anti-vibration shoes provided with a low specific gravity rubber sole according to the present invention include: a conductive outsole 10 provided with a low specific gravity rubber part; a rubber sole 20 laminated on top of the outsole 10 and provided with a conductive rubber part; an insole 30 laminated on the rubber sole 20 and including conductivity; an upper 40 having a lightning-shaped pattern on the outside using a conductive yarn; and an ankle and a leg protector 50 that protects the upper end of the ankle, wherein the transformation-shaped pattern of the upper 40 penetrates from the outside of the upper 40 to the inside. The rubber sole 20 has an electrical resistance of 10 ⁶ to 10 ⁸ Ω. The rubber sole 20 contains 14 to 15 parts by weight of butadiene rubber, 95 to 10 parts by weight of nitrile butadiene rubber, 25 to 30 parts by weight of silicon oxide, 2 to 3 parts by weight of polyethylene glycol, and 4 parts by weight of zinc oxide based on 1 part by weight of stannic acid. to 5 parts by weight, 2 to 3 parts by weight of sulfur, 2 to 3 parts by weight of titanium dioxide, and 7 to 8 parts by weight of an antistatic agent are prepared by mixing.

Description

Anti-vibration shoes with low specific gravity rubber soles

The present invention relates to a dustproof manufacturing method provided with a low specific gravity rubber sole, and is provided with conductive rubber instead of a conventional polyurethane (PU) sole. will be.

Anti-vibration shoes refer to shoes manufactured by applying anti-static and low-particle outsoles and anti-vibration fabrics to control the generation of static electricity, just like dust-proof clothing in a clean room environment. Anti-vibration shoes are designed ergonomically using materials suitable for their intended use, so that workers feel less fatigue even after working for a long time.

In the case of anti-vibration, some of the static electricity generated by the movement of the human body is neutralized through anti-vibration, and the rest must be dissipaitive by being grounded with the floor surface of the clean room through the conductive yarn of the anti-vibration. It is worn for the purpose of performing the role of an electrostatic passageway for cotton, and a more certain effect can be obtained for static electricity control measures.

However, generally manufactured and sold anti-vibration shoes are made of polyurethane (PU) brush, which causes a problem of hydrolysis. Therefore, in the present invention, it is possible to manufacture dustproof shoes using conductive rubber to prevent hydrolysis and to manufacture dustproof shoes strong against dust.

Korean Patent Publication No. 2001-0076983

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a dustproof shoe with a low specific gravity rubber sole capable of protecting the foot from external stimuli by increasing the strength of the outsole 10 .

In addition, the present invention aims to provide anti-vibration that can be neutralized by some static electricity and the rest can be attenuated by being grounded with the floor surface of the clean room through the conductive yarn of the anti-vibration. .

The technical problems to be solved by the invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

Anti-vibration shoes provided with a low specific gravity rubber sole according to the present invention,

Conductive outsole (10) provided with a low specific gravity rubber portion;

a rubber sole 20 laminated on top of the outsole 10 and provided with a conductive rubber part;

an insole 30 laminated on the rubber sole 20 and including conductivity;

an upper 40 having a lightning-shaped pattern on the outside using a conductive yarn; and

A leg protector (50) that protects the ankle and the upper end of the ankle;

The transformation-shaped pattern of the upper 40 is,

It is characterized in that it penetrates from the outside to the inside of the upper (40).

The rubber sole 20 has an electrical resistance of 10 ⁶ to 10 ⁸ Ω.

The rubber sole 20 contains 14 to 15 parts by weight of butadiene rubber, 95 to 10 parts by weight of nitrile butadiene rubber, 25 to 30 parts by weight of silicon oxide, 2 to 3 parts by weight of polyethylene glycol, and 4 parts by weight of zinc oxide based on 1 part by weight of stannic acid. to 5 parts by weight, 2 to 3 parts by weight of sulfur, 2 to 3 parts by weight of titanium dioxide, and 7 to 8 parts by weight of an antistatic agent are prepared by mixing.

By means of solving the above problems, the present invention can provide a dustproof shoe with a low specific gravity rubber sole capable of protecting the foot from external stimuli by increasing the strength of the outsole 10 .

In addition, according to the present invention, a part of static electricity can be neutralized through anti-vibration, and the rest can be provided with anti-vibration that can be attenuated by being grounded with the floor surface of the clean room through the conductive yarn of the anti-vibration.

In addition, the present invention has the effect that a low specific gravity rubber can be manufactured by preparing the rubber sole 20 with conductive rubber and adding an antistatic agent to make it rubberized.

1 is an external and internal photograph of a dustproof shoe provided with a low specific gravity rubber sole of the present invention.
2 is a side view of the dustproof shoes provided with the low specific gravity rubber sole of the present invention.
3 is a front view of the dustproof shoes provided with the low specific gravity rubber sole of the present invention.
4 is a photograph of the back of the dustproof shoes provided with the low specific gravity rubber sole of the present invention.
5 is a plan view of the anti-vibration shoes provided with the low specific gravity rubber sole of the present invention.

Terms used in this specification will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected as currently widely used general terms as possible while considering the functions in the present invention, which may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

In the entire specification, when a part “includes” a component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, with reference to the accompanying drawings, the embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the embodiments of the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein.

Specific details including the problem to be solved for the present invention, the means for solving the problem, and the effect of the invention are included in the embodiments and drawings to be described below. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a dustproof manufacturing method provided with a low specific gravity rubber sole, and is provided with conductive rubber instead of a conventional polyurethane (PU) sole. will be.

As shown in FIG. 1 , the anti-vibration shoe provided with the low specific gravity rubber sole of the present invention consists of an outsole 10 , a rubber sole 20 , an insole 30 , an upper 40 , and a leg protection unit 50 .

First, the outsole 10 is provided with a low specific gravity rubber part, and includes conductivity. The outsole 10 is provided at the lower end of the rubber sole 20 , and the rubber sole 20 and the insole 30 are stacked on the upper end of the outsole 10 . In addition, the outsole 10 is provided to surround the side surfaces of the rubber sole 20 and the insole 30 .

The outsole 10 is preferably provided with a rubber part.

Next, the rubber sole 20 is laminated on the top of the outsole 10 and provided with a conductive rubber sponge. It is preferable that the rubber sole 20 is provided as a low specific gravity rubber part, has conductivity, and is provided in a sponge type.

The rubber sole 20 preferably has an electrical resistance of 10 ⁶ to 10 ⁸ Ω. It is confirmed that safety boots are 10 ⁵ to 10 ⁸ Ω in the clean room suggested by the World Industrial Safety Standards.

The rubber part of the outsole 10 and the rubber sole 20 is 14 to 15 parts by weight of butadiene rubber, 95 to 10 parts by weight of nitrile butadiene rubber, 25 to 30 parts by weight of silicon oxide, 2 to 2 parts by weight of polyethylene glycol based on 1 part by weight of stannic acid. It is prepared by mixing 3 parts by weight, 4 to 5 parts by weight of zinc oxide, 2 to 3 parts by weight of sulfur, 2 to 3 parts by weight of titanium dioxide, and 7 to 8 parts by weight of an antistatic agent.

The stearic acid is used as a by-product and elasticity enhancer.

The silicon oxide improves friction performance.

The polyethylene glycol is used as a surfactant, lubricant and preservative.

The zinc oxide is used as a crosslinking activator because it blocks ultraviolet rays and has high heat resistance.

The sulfur is used as a vulcanizing agent and a vulcanizing agent.

The antistatic agent is polyethylene glycol ester (Polyethylene glycol ester) as a main component and is used as an antistatic agent because of electrical conductivity.

In addition, the rubber sole 20 is a mixture of a Thiuram-based accelerator, a mid-term accelerator and a Thiazol-based vulcanization accelerator as an initial accelerator, 0.1 to 0.2 parts by weight of the initial accelerator, 1.0 to 0.2 parts by weight of the initial accelerator, based on 1 part by weight of the stannic acid 2.0 parts by weight and 0.5 to 1.0 parts by weight of late accelerator are mixed.

Preferably, the initial accelerator is THIRAM, the intermediate accelerator is Dibenzothiazyl disulfide (MBTS), and the late accelerator is MERCAPTOBENZOTHIAZOLE.

Thiram (THIRAM) as the initial promoter represents the molecular formula of ((CH ₃ ) ₂ -NCS) ₂ -S ₂ .

Dibenzothiazyl disulfide (MBTS) as the intermediate accelerator has a structural formula as shown in [Formula 1] below. The mid-stage accelerator is the most widely used accelerator in all areas of rubber, and prevents higher temperature characteristics, premature curing and scorching than the late-stage accelerator. It is also safe to handle and preferred for use with the initial accelerator.

As the late-stage accelerator, mercaptobenzothiazole (MERCAPTOBENZOTHIAZOLE) represents a molecular formula of C ₇ H ₅ NS ₂ .

Next, the insole 30 is stacked on top of the rubber sole 20 and includes conductivity. The insole 30 is made of ortholite, so it has good elasticity and excellent breathability and moisture control functions. In the case of the generally used insole, EVA lacks breathability and elasticity, but it is light and inexpensive.

The insole 30 further includes an insole pattern part 31 on one side that the foot touches. The insole pattern part 31 is sewn by applying nickel-plated copper fabric to prevent oxidation. If there is a lot of sewing, unevenness is generated and it is inconvenient to wear, so a nickel-plated copper fabric with a large surface area that can be connected to the bottom surface to increase efficiency is preferable. That is, it is possible to create a structure in which electricity is energized while maintaining the comfort and comfort inside the shoe through the insole pattern part 31 .

Next, the upper 40 is provided with a lightning-shaped pattern on the outside using a conductive yarn. The upper 40 includes an upper pattern portion 41 in which a conductive yarn is provided with a lightning-shaped pattern on the outside of the upper 40 and a pattern penetrating portion 42 in which the conductive yarn penetrates from the outside to the inside of the upper 40 . is composed of

More specifically, the upper pattern part 41 is made of carbon material yarn (graphene) on the upper end fabric, and nickel copper plated tape is sewn on the back side using carbon material yarn (graphene), which is from the upper end to the back side. It plays a role in connecting and discharging static electricity. The upper pattern part 41 is connected to the rubber sole 20 as the pattern penetration part 42 , which is connected to the outsole 10 , so that the inside of the shoe is all connected and grounded.

Next, the leg protection unit 50 protects the ankle and the upper end of the ankle. The leg protection part 50 is provided with a zipper part 51 on the front side, and a closing part 52 connecting the cloth of the leg protection part 50 in a circle on the back side. The leg protection part 50 is preferably made of carbon vibration-proof fabric.

Below, the rubber part manufacturing components of the outsole 10 and the rubber sole 20 are shown as an example. [Table 1] shows the mixing amount and mixing ratio of the rubber part.

ingredient mixed amount mixing ratio Characteristic butadiene rubber 5 8.56 Nitrile Butadiene Rubber 35 59.93 stearic acid 0.35 0.6 Dispersant, elasticity enhancer Silicon oxide (silica) 10 17.12 Increased friction performance polyethylene glycol One 1.71 Surfactants, lubricants, preservatives zinc oxide 1.7 2.91 High UV protection and heat resistance, acting as a crosslinking activator initial accelerator 0.05 0.09 Thiuram-based vulcanization accelerator medium term accelerator 0.25 0.43 Thiazol-based vulcanization accelerator late accelerator 0.55 0.94 Thiazol-based vulcanization accelerator sulfur 0.9 1.54 Vulcanizer/Vulcanizer titanium dioxide One 1.71 antistatic agent 2.6 4.45 Sum 58.4 100

Below, the tensile strength, tear strength, hardness, abrasion resistance, density, and slip resistance tests of the outsole 10 were conducted in anti-vibration shoes provided with the low specific gravity rubber sole of the present invention, and are shown in [Table 2].

The experimental example of the outsole 10 was conducted by the FITI testing institute, and slip resistance (main test piece: size 265mm, mounting method: shoe bone, test floor: steel floor made of stainless steel, dry test conditions: glycerin was not applied Uncoated state, wet test conditions: 30 mL of distilled water was applied without glycerin) was carried out according to KS M ISO 13287: 2015.

Test Items result Test Methods Tensile strength (MPa) 15.6 KS M 6518:2018
(Dumbbell No. 3) Tear strength (N/mm) 37.5 KS M 6518:2018
(B) Type Hardness(-) 59 KS M 6518:2018
(A-TYPE) Wear resistance (%) 133 KS M 6625:2018 Density (Mg/m3) 1.15 KS M ISO 278:2015 Slip resistance (coefficient of friction) deflation 1.18 wet 0.91

[Table 3] shows the surface resistivity test of the rubber sole 20 in the anti-vibration shoes provided with the low specific gravity rubber sole of the present invention.

The experimental example of the rubber sole 20 was conducted by the FITI testing institute, and the surface resistivity (outer diameter of the inner circle of the surface electrode 1.96 cm, inner diameter of the annular electrode on the surface 2.41 cm) was determined according to ASTM D 257 - 2007. carried out.

Test Items result Surface resistivity (Ω) Less than 7.3 x 10 ⁷

[Table 4] shows the surface resistivity, washing fastness and friction fastness tests of the insole 30 in anti-vibration shoes provided with the low specific gravity rubber sole of the present invention.

The experimental example of the insole 30 was conducted by the FITI testing institute, and the surface resistivity (test conditions: 100V, 1 minute, antistatic equipment: SHIMADZU, STABLO-AP, friction conditions: KS K ISO 105 X12: 2016) was KS K 0170:2019. Washing fastness (washing temperature: 40±2℃, washing time: 30 minutes, 0.4% ECE standard detergent, 0.1% sodium perborate, 10 steel balls) was performed according to KS K ISO C06:2010. Friction fastness was conducted according to KS K ISO 105 X12: 2016.

Test Items result Present state surface resistivity (Ω) Less than 7.6 x 10 ⁷ Surface resistivity after friction (Ω) case Less than 7.4 x 10 ⁷ wet Less than 7.5 x 10 ⁷ Wash fastness discoloration 4-5 pollution noodle 4-5 polyester 4-5 Friction fastness wale case 4-5 wet 4-5 course case 4-5 wet 4-5

By means of solving the above problems, the present invention can provide a dustproof shoe with a low specific gravity rubber sole that can protect the foot from external stimuli by increasing the strength of the outsole 10 .

In addition, according to the present invention, a part of static electricity can be neutralized through anti-vibration, and the rest can be provided with anti-vibration that can be attenuated by being grounded with the floor surface of the clean room through the conductive yarn of the anti-vibration.

In addition, the present invention has an effect that a low specific gravity rubber can be manufactured by preparing the rubber sole 20 with conductive rubber and adding an antistatic agent to make it rubberized.

As such, those skilled in the art to which the present invention pertains will understand that the above-described technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the above detailed description, and the meaning and scope of the claims and their All changes or modifications derived from the concept of equivalents should be construed as being included in the scope of the present invention.

10. Outsole
20. Rubber sole
30. Insole
31. Insole pattern part
40. Upper
41. Upper pattern part
42. Pattern penetration part
50. Legguards
51. Zipper part
52. Closing

Claims (5)

The outsole 10 provided with a conductive rubber part;
a rubber sole 20 laminated on top of the outsole 10 and provided with a conductive rubber sponge;
an insole 30 laminated on the rubber sole 20 and including conductivity;
an upper 40 having a lightning-shaped pattern on the outside using a conductive yarn; and
A leg protector (50) that protects the ankle and the upper end of the ankle;
The lightning-shaped pattern of the upper 40 is,
Penetrating from the outside to the inside of the upper (40),
The conductive rubber part,
14 to 15 parts by weight of butadiene rubber, 95 to 10 parts by weight of nitrile butadiene rubber, 25 to 30 parts by weight of silicon oxide, 2 to 3 parts by weight of polyethylene glycol, 4 to 5 parts by weight of zinc oxide, sulfur 2 based on 1 part by weight of stannic acid to 3 parts by weight, 2 to 3 parts by weight of titanium dioxide, and 7 to 8 parts by weight of an antistatic agent.
The method of claim 1,
The rubber sole 20,
Anti-vibration provided with a low specific gravity rubber sole, characterized in that the electrical resistance is 10 ⁶ to 10 ⁸ Ω.
delete The method of claim 1,
The rubber part,
Thiuram-based accelerator as the initial accelerator and Thiazol-based vulcanization accelerator as the late accelerator,
Anti-vibration rubber sole provided with a low specific gravity rubber sole, characterized in that it is prepared by mixing 0.1 to 0.2 parts by weight of the initial accelerator, 1.0 to 2.0 parts by weight of the intermediate accelerator, and 0.5 to 1.0 parts by weight of the late accelerator based on 1 part by weight of the stearic acid.
5. The method of claim 4,
The initial accelerator is THIRAM,
The medium-term accelerator is dibenzothiazyl disulfide (MBTS),
The anti-vibration agent provided with a low specific gravity rubber sole, characterized in that the late accelerator is mercaptobenzothiazole (MERCAPTOBENZOTHIAZOLE).

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