KR20120103196A - The composition of rubber sheet and manufacturing method thereof - Google Patents

Abstract

PURPOSE: A manufacturing method of a rubber sheet is provided to provide a rubber sheet composition having excellent fatigue characteristics, elasticity, and a hardness lower than existing rubber products by 10 degrees or more. CONSTITUTION: A manufacturing method of a rubber sheet comprises: a step(S10) of mixing natural rubber and synthetic rubber; a step(S20) of putting carbon white, carbon black, and zinc oxide in, and mixing the same; a step of cooling the mixture to 80°C, putting stearic acid, antioxidant, accelerator, and vulcanization accelerator; a step(S30) of putting the accelerator into, mixing the additive mixture, and maintaining the temperature of 80 °C; a step(S40) of putting a reinforcing agent, abrasion reinforcing agent, and a vulcanization inhibitor, and mixing the same while maintaining the temperature; a step of putting a vulcanizing agent and sulfur in and mixing the same while maintaining 80 °C and 8 kg/cm^2. [Reference numerals] (AA) Start; (BB) End; (S10) Injecting and mixing TTR-5L, SBR 1502M KBR-01, KHS-68 in heated state in order; (S20) Putting carbon white 55, carbon black HAFN330 and zinc oxide in; (S30) After cooling, putting ST/A, NHT, DM and CZ in and putting DC(DPG) and TS to mix; (S40) Putting PEG-4000, A-1280 and PVI in and mixng while maintaining cooled temperature; (S50) Putting in and Mixing DCP and S; (S60) Packing and shipping

Description

Rubber sheet composition and manufacturing method therefor {THE COMPOSITION OF RUBBER SHEET AND MANUFACTURING METHOD THEREOF}

The present invention relates to a rubber sheet manufacturing technology, and more particularly, to a rubber sheet composition and a method for producing the rubber sheet composition to be lower than the specific gravity of the general rubber with rubber floating in water with a low specific gravity rubber sheet.

Rubber is not only used as a material of various products, but also rubber is applied to prevent the safety accidents caused by slip frequently occurring in daily life. Especially, in the case of shoes, studies on rubber having excellent anti-slip characteristics continue. And various products are manufactured using the buoyancy of rubber.

However, such a conventional rubber has a problem that the anti-slip effect is sharply reduced due to contamination or damage to the surface with prolonged use due to the weak physical properties.

In the case of rubber having excellent anti-slip properties, the general bottom surface is effective due to the excellent properties of the rubber, but when the bottom surface becomes slippery by water, ice, or snow, the effect is remarkably inferior.

In the conventional shoe industry, foams have generally been used to provide cushioning or shock absorption to shoes.

However, in today's fiercely competitive industrial society, it is necessary to differentiate cushioning properties and shock absorbers, and for this purpose, lightweight foams having physical properties that maximize shock absorption are required.

Until now, some soft polyvinyl chloride, polynorbornene, polyurethane, and the like have been used as shock absorbing materials for shoes, but in any case, the energy absorption characteristics at the glass transition point of each polymer are utilized. In the case of soft polyvinyl chloride, the physical properties are excellent, but they are not only high-weighted, but are also avoided because they cause environmental pollution problems. In the case of polynorbornene, the shock-absorbing properties are excellent, but they are also expensive. There is a problem that is difficult to realize the physical properties.

On the other hand, polyurethane has the advantage of excellent shock absorption in a wide temperature range, but it is difficult to reduce the weight and has the disadvantages of discoloration resistance and water resistance is bad. Particularly, in the case of the foam for shoes, the tensile strength, tear strength, elongation rate, permanent compression rate, etc., as well as hardness or specific gravity, may be applied only when a certain limit or more is applied. Therefore, in the case of the soft polyvinyl chloride, polyurethane, and polynorbornene It has been used as a part for shoes, but there was a limit to the application.

Particularly, in the case of shoes, the interest in health these days is increasing, and active leisure and sports activities under various climatic conditions are required to develop rubber having excellent physical properties.

Accordingly, in the relevant technical field, since the specific gravity is low and the hardness is low, the technical development of the rubber sheet excellent in the fatigue and elasticity of the foot during long time activities is required.

The present invention is to solve the above problems, to provide a rubber sheet composition and a method of manufacturing the rubber sheet composition which is lower than the specific gravity of the general rubber in the rubber floating in water with a low specific gravity rubber sheet.

In addition, the present invention is to provide a rubber sheet composition for use in a rubber product requiring a higher buoyancy and a method of manufacturing the same.

In addition, the present invention is to provide a rubber sheet composition and a method for producing excellent rubber sheet composition and its excellent flexibility, such as excellent fatigue and elasticity of the foot during prolonged activity because the hardness is 10 degrees or more lower than the conventional rubber products.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the rubber sheet manufacturing method is a mixture of natural rubber TTR-5L, synthetic rubber SBR 1502, synthetic rubber KBR-01, synthetic rubber KHS-68, synthetic rubber RB-820 in order. First process step; A second process step of introducing white carbon 155, black carbon HAFN330, and zinc oxide (zinc); A third process step of adding ST / A (stearic acid), antioxidant BHT, accelerator DM, vulcanization accelerator CZ, and then adding accelerator DC (DPG) and TS; A fourth process step of mixing by adding a reinforcement PEG-4000, a reinforcement A-1280, a vulcanization retardant PVI while maintaining the cooled temperature; And a fifth process step of mixing the mixture having finished the fourth process by adding DCP, which is a catalyst, and S (sulfur), as a catalyst. Characterized in that it comprises a.

Rubber sheet manufacturing method according to another embodiment of the present invention, in the first process step, mixing the heating temperature at the time of mixing to minimize the temperature deviation ± 80 ℃ ± 7 minutes and the speed is 160 revolutions per minute It is maintained, the pressurized pressure during rotation is maintained for 8kg / ㎠ to operate for 5 minutes and after 7 minutes of operation time is characterized in that the temperature is maintained at 110 ℃.

In the rubber sheet manufacturing method according to another embodiment of the present invention, the secondary process step, maintaining the same conditions as the first revolving step, the white carbon 155, black carbon HAFN330, zinc oxide (zinc oxide After the primary process is finished in 1 minute, the pressing force is maintained at 8㎏ / ㎠ and the temperature is maintained at 130 ℃ characterized in that the mixture for 3 minutes.

In the rubber sheet manufacturing method according to another embodiment of the present invention, the third process step, if the mixing is made by the second process step, after cooling the temperature to 80 ℃, the ST / A (stearic acid), After adding BHT as an antioxidant, DM as a promoter, and CZ as a vulcanization accelerator, 2 minutes after the addition is completed, DC (DPG) and TS as promoters are mixed for 5 minutes and mixed to maintain the temperature at 80 ° C. It is done.

In the rubber sheet manufacturing method according to another embodiment of the present invention, the fourth process step is mixed by adding a reinforcement PEG-4000, abrasion reinforcement A-1280, PVI vulcanizing retardant while maintaining the cooled temperature as it is The mixture is maintained at 80 ° C. after the third process step, and the mixture is added by mixing the reinforcement PEG-4000, the wear reinforcement A-1280, and the vulcanization retardant PVI, and the temperature is 80 ° C. and the pressure is 8 kg. / Cm 2, characterized in that performed by setting the total mixing time to 5 minutes.

In the rubber sheet manufacturing method according to another embodiment of the present invention, the fifth process step, while maintaining the temperature at 80 ℃ and pressurized pressure at 8kg / ㎠, to the mixture finished the fourth process step It is characterized in that the mixing is performed for 4 minutes by adding the catalyst, the vulcanizing agent DCP, and S (sulfur).

Rubber sheet composition according to an embodiment of the present invention, the rubber sheet composition prepared by the rubber sheet manufacturing method, the TTR-5L is 25,000g, the SBR is 1502 20,000g, the KBR-01 is 5,000g, the KHS -68 is 10,000g, the RB-820 is 6,000g, the white carbon is 155 3,000g, the HAFN300 is 2,000g, the zinc oxide is 1,500g, the ST / A is 450g, the BHT is 600g, the DM is 330g, the CZ is 370g, the DC is 100g, the TS is 20g, the PEG-4000 is 300g, the DCP is 50g, the A-12280 is 150g, the PVI is 100g, the S 670g is formed It is done.

The rubber sheet composition and the method of manufacturing the same according to an embodiment of the present invention provide a low specific gravity of the rubber sheet floating in water to provide an effect that can be formed lower than the specific gravity of the general rubber.

In addition, the rubber sheet composition and the manufacturing method according to another embodiment of the present invention provides an effect that can be used in a rubber product that requires a higher buoyancy.

In addition, the rubber sheet composition and the manufacturing method according to another embodiment of the present invention, since the hardness is 10 degrees or more lower than the conventional rubber products, because the fatigue and elasticity of the foot is excellent during prolonged activity, the surface adhesion and bending Provides excellent effects.

1 is a flow chart showing a rubber sheet manufacturing method according to an embodiment of the present invention.
Figure 2 is a table showing the content of the rubber sheet composition prepared by the rubber sheet manufacturing method according to an embodiment of the present invention.
Figure 3 is a view showing the test results for the rubber sheet composition prepared by the rubber sheet manufacturing method according to an embodiment of the present invention.

Hereinafter, a detailed description of a preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a flow chart showing a rubber sheet manufacturing method according to an embodiment of the present invention. Referring to Figure 1, the rubber sheet manufacturing method, the natural rubber TTR-5L, synthetic rubber SBR 1502, synthetic rubber KBR-01, synthetic rubber KHS-68, synthetic rubber RB-820 in order to mix the materials in order 1 Perform the difference process (S10).

When mixing, mix the heating temperature to minimize the temperature deviation of 80 ℃ ± temperature and operate the mixing time for 7 minutes and maintain the speed of 160 revolutions per minute.

During rotation, pressurized pressure should be maintained at 8㎏ / ㎠ for 5 minutes and after 7 minutes of operation, the temperature should be maintained at 110 ℃.

Here, TTR-5L has extremely excellent mechanical properties (physical properties), the best surface feel among rubbers, and extremely excellent wear resistance and flex resistance.

TTR-5L is composed of rubber hydrocarbon (89.3 ~ 92.35%), protein (2.5% ~ 3.5%) moisture, pollen, etc.

SBR (Styrene Butadieme Rubber) 1502 is formed by low temperature emulsion polymerization and is a general purpose product with various characteristics of rubber products. It is used for shoe soles, tire side wheels and molding products.

SBR (Styrene Butadieme Rubber) 1502 is the most commonly used general purpose rubber among synthetic rubbers and has excellent wear resistance and heat resistance compared to natural rubber.

KBR-01 is a homopolymer with three bonding forms of Cis-1.4, trans-1.4, and vimyl structure, and its content is 95% or more. It is excellent in wear resistance, rebound elasticity, aging resistance, and water resistance. Its uses are tires, shoes, belts, rubber hoses, golf balls, and the most widely used synthetic rubber.

KHS-68 is a product made by mixing synthetic rubber latex, which acts as a plasticizer at high temperature when rubber compounding, improves workability, and has excellent wear resistance, heat resistance, and flex resistance, and is an industrial product for soles, sponges, automobiles, etc. Used.

Since RB-820 flows when heated, it can easily be molded and processed like thermoplastics, and has good rubber elasticity at room temperature. It starts with polymers, automobile damping agents, and dissolving bags, and films, various shoes, sheets, hoses, sponges and resins. Used as ash.

After step S10, a secondary process of introducing white carbon 155, black carbon HAFN330, and zinc oxide (zinc) is performed (S20).

The secondary process of step S20 also maintains the same conditions as the primary process, and white carbon 155, black carbon HAFN330, and zinc oxide (zinc) are added within 1 minute after the first process. In the second process, the pressing force is maintained at 8㎏ / ㎠ and the temperature is maintained at 130 ℃ and the work is mixed for 3 minutes.

Here, 155, which is a back carbon, refers to a substance added for the purpose of anti-aging, reinforcement, and increase in practical use of filler rubber or plastic. For example, the carbon added to obtain the strength needed to make automobile tires from rubber corresponds to fillers.

HAFN330, a black carbon, is a light black, powdery, amphoteric oxide that is hardly soluble in water but soluble in dilute acids and concentrated alkalis. It is used for industrial rubber products with few particles, good reinforcement and abrasion resistance, and used for high hardness products and good for increasing tensile strength.

Zinc oxide (zinc oxide) acts as an accelerator in the sulfur and vulcanization of rubber and is used as a vulcanizing agent for halogenated rubber and carboxylated SBR or NBR. Compounding in large amounts becomes a reinforcing agent and improves the thermal conductivity of the compounded rubber. In addition, zinc oxide (zinc oxide) is used as a white colorant in high water products, also called zincation.

After step (S20), after cooling the temperature to 80 ℃ in the secondary process, ST / A (stearic acid), BHT as an antioxidant, DM as promoter, CZ as a vulcanization accelerator, and after 2 minutes after the completion of the addition of the accelerator Phosphorus DC (DPG), TS is added and mixed for 5 minutes and the third step to maintain the temperature is necessarily 80 ℃ (S30).

Here, ST / A (stearic acid) is an inert liquid and softener that is indispensable for solid substance rubber products made by adding oxidizing agents based on animal and vegetable fats and oils.

Antioxidant BHT is colorless crystalline white crystalline powder or lumps with melting point of 69-72 ° C. Soluble in ethanol, oils, methanol, benzene, acetone, etc. It is stable to light and heat, is volatile, and has a transition effect on processed products that undergo a heating process. It is mainly used to prevent the oxidation of oils and fats, edible oil, butter, mayonnaise, etc.

DM is a sulfur-based drug that adjusts accelerator vulcanization time and slightly delays vulcanization time.

CZ, a vulcanization accelerator, is a representative of vulcanization accelerators. It is safe for vulcanization even in large amounts of FURNACE BLACK, and is used for products requiring tensile strength and applied to various industrial wires and shoes.

DC (DPG) is used together with acid accelerators, and is widely used by thiazole and thiuram accelerators, and has excellent effect on dark or black products. DC (DPG) is used for tires, rubber, shoes and hard rubber products.

TS promoter has low SCORCH property and is not used for vulcanizing agent. It acts as a lubricant for THIAZOLE type accelerator around 105 ℃. Products using a small amount of TS accelerator have good heat resistance and fire resistance.

After step S30, the fourth step of rapidly adding and mixing PEG-4000 as a reinforcement, A-1280 as a wear reinforcement, and PVI as a vulcanization retardant while maintaining 80 ° C. after the tertiary process in step S30 is maintained. Perform (S40).

That is, the 4th process maintains the mixture after the 3rd process as it is at 80 ℃, the chemicals are added quickly and mixed, the temperature is maintained at 80 ℃, pressurized pressure at 8㎏ / ㎠, total mixing time 5 Set to minutes.

PEG-4000 is a polyethylene glycol polymer, usually an opaque solid or white solid, used extensively with other cosmetic ingredients and blended to achieve the desired appearance, viscosity and melting point of the product. Polyethylglycols are good solvents, binders, carriers, lubricants, bases.

Abrasion reinforcement material A-1280 improves the combination properties such as tensile strength, modulus, wear, aging, light resistance, cracking, electrical resistance, etc., and increases the addition amount and increases the hardness and tensile stress. In the case of synthetic rubber, A-1280, a wear reinforcing material, improves physical properties even with inertness and fillers. A-1280, a wear reinforcing material, has a large contact economic area between rubber and solid dispersed phase, and improves adhesion, surface area, particle shape, cohesive strength, and particle surface properties.

PVI, a vulcanization retardant, plays a role of vulcanization and delay of natural rubber or synthetic rubber, and it is a small amount of subscript to suppress SCORCH and prevent its occurrence.When using more than 0.5PHR, the viscosity of rubber decreases and BLOOMING can occur. In addition, the long-term storage and process score of rubber increases when added. PVI, a vulcanization retardant, is non-polluting, so when used in white rubber, it has better dispersion and less dust.

After the step (S40), the fifth step of performing the mixing for 4 minutes by adding a DCP, a vulcanizing agent, and S (sulfur), which is a key catalyst of the rubber sheet, to the mixture after the fourth process (S50). Here, in the fifth step, the product temperature after the fourth step is maintained at 80 ° C. and the pressurization pressure is maintained at 8 kg / cm 2, and DCP and S (sulfur) as a vulcanizing agent are added and mixed.

DCP is a material organic peroxide that combines molecules of vulcanizing linear polymer compound with each other to take a net structure and is used as a representative crosslinking agent and curing agent of rubber and silicone rubber. DCP facilitates compounding and does not change color of crosslinked products when it comes into contact with metals or PVC in short vulcanization times. It is a polymerizable plasticizer added for controlling hardness and strength.

S (sulfur) is an indispensable vulcanizing agent in the physical formation of rubber products. Insoluble sulfur, on the other hand, is a vulcanizing agent for transparent products. Rubber Products Since sulfur is produced by sulfur, sulfur is a key catalyst.

After step S50, the sixth process of packaging and shipping the rubber sheet is performed.

On the other hand, it is important to maintain the temperature, time, and pressure of the step (S10) to step (S50), and if the mixing conditions are not observed, the rubber sheet may be produced inaccurately in the total physical properties and viscosity.

Figure 2 is a chart showing the content of the rubber sheet composition prepared by the rubber sheet manufacturing method according to an embodiment of the present invention.

2, the rubber sheet composition is TTR-5L 25,000g, SBR 1502 20,000g, KBR-01 5,000g, KHS-68 10,000g, RB-820 6,000g, White Carbon 155 3,000g, HAFN300 2,000g, oxidation It is formed of 1500 g of zinc, ST / A 450 g, BHT 600 g, DM 330 g, CZ 370 g, DC 100 g, TS 20 g, PEG-4000 300 g, DCP 50 g, A-12280 150 g, PVI 100 g, S 670 g.

3 and 4 is a view showing the test results for the rubber sheet composition prepared by the rubber sheet manufacturing method according to an embodiment of the present invention. In more detail with reference to Figure 3, a low specific gravity (specific gravity 0.98) of the rubber floating in the water is formed below the specific gravity of the general rubber of 1.2 or more.

The strength is 55 degrees or less, and is formed lower than 65 degrees or more of the hardness of general rubber.

Attached Figure 4 is a result of requesting a test for the rubber sheet composition according to the present invention in Korea Foot Leather Research Institute as shown in the results of Figure 3 of the present invention has a low specific gravity compared to the general rubber and low specific gravity of rubber in terms of hardness It was confirmed that the hardness was low.

The use of the rubber sheet composition prepared by the rubber sheet manufacturing method is used for athlete's sneakers, hiking boots, golf shoes, men's shoes, military soles, life jackets, buoyancy aids for swimming, rubber products requiring buoyancy and the like. It is also used for non-slip and cushioning in industrial and everyday life.

Since the rubber sheet composition prepared by the rubber sheet manufacturing method has a hardness of 10 degrees or lower than conventional rubber products, the fatigue and elasticity of the foot are excellent during prolonged activity, and thus the surface adhesion and bending are excellent.

In addition, since the specific gravity is lower than that of general products, the adhesion to the ground is excellent, preventing slippage. It has a specific gravity of 0.98 and can be used for all products requiring marine buoyancy. It is a sheet needed to develop rubber products, and has developed products through years of production know-how and research and development.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they have been used only in a general sense to easily describe the technical contents of the present invention and to facilitate understanding of the invention , And are not intended to limit the scope of the present invention. It is to be understood by those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims (5)

A first process step of sequentially adding and mixing materials of natural rubber TTR-5L, synthetic rubber SBR 1502, synthetic rubber KBR-01, synthetic rubber KHS-68, and synthetic rubber RB-820 in order;
A second process step of introducing white carbon 155, black carbon HAFN330, and zinc oxide (zinc);
When the mixing is carried out by the second process step, the temperature is cooled to 80 ° C., ST / A (stearic acid), BHT as an antioxidant, DM as a promoter, CZ as a vulcanization accelerator, and then 2 minutes after completion of the addition. A third process step of mixing the DC (DPG), TS, which is the accelerator, for 5 minutes, and maintaining the temperature at 80 ° C;
A fourth process step of mixing by adding a reinforcement PEG-4000, a reinforcement A-1280, a vulcanization retardant PVI while maintaining the cooled temperature; And
A fifth process step of mixing the mixture after completion of the fourth process by maintaining the temperature at 80 ° C. and pressing pressure at 8 kg / cm 2, adding DCP as a catalyst, and S (sulfur) to perform mixing for 4 minutes; Rubber sheet manufacturing method comprising a.
The method of claim 1, wherein the first process step,
When mixing, mix the heating temperature to minimize the temperature deviation of 80 ℃ ± temperature, operate the mixing time for 7 minutes, maintain the speed of 160 revolutions per minute, and operate the pressurization pressure at 8㎏ / ㎠ for 5 minutes while rotating. After 7 minutes, the rubber sheet manufacturing method characterized in that the temperature is maintained at 110 ℃.
The method of claim 1, wherein the secondary process step,
The conditions were maintained in the same manner as the first revolving step, and the white carbon 155, black carbon HAFN330, and zinc oxide (zinc) were added within 1 minute after the first process, and the pressing force was 8 kg / cm 2. Rubber sheet manufacturing method characterized in that the mixture is maintained for 3 minutes while maintaining the temperature at 130 ℃.
The method of claim 1, wherein the fourth process step,
While maintaining the cooled temperature, add PEG-4000 as a reinforcing material, A-1280 as a reinforcing material, and PVI as a vulcanization retardant.
Maintain the mixture after the third process step as it is at 80 ℃ and mixed by adding the reinforcing material PEG-4000, wear reinforcing material A-1280, vulcanization retardant PVI, temperature 80 ℃, pressure pressure 8kg / ㎠ Rubber sheet manufacturing method characterized in that performed by setting the total mixing time to 5 minutes.
The rubber sheet composition prepared by the rubber sheet manufacturing method of claim 1,
The TTR-5L is 25,000 g, the SBR is 1502 20,000 g, the KBR-01 is 5,000 g, the KHS-68 is 10,000 g, the RB-820 is 6,000 g, the back carbon is 155 3,000 g, and the HAFN300 is 2,000g, the zinc oxide is 1500g, the ST / A is 450g, the BHT is 600g, the DM is 330g, the CZ is 370g, the DC is 100g, the TS is 20g, the PEG-4000 is 300g, the Rubber sheet composition, characterized in that the DCP is 50g, the A-12280 is 150g, the PVI is 100g, S 670g.

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