CN110628103A - Rubber sole for kitchen use, preparation method and secondary vulcanization process thereof - Google Patents
Rubber sole for kitchen use, preparation method and secondary vulcanization process thereof Download PDFInfo
- Publication number
- CN110628103A CN110628103A CN201910927632.5A CN201910927632A CN110628103A CN 110628103 A CN110628103 A CN 110628103A CN 201910927632 A CN201910927632 A CN 201910927632A CN 110628103 A CN110628103 A CN 110628103A
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- Prior art keywords
- rubber
- parts
- vulcanization
- kitchen
- sole
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Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B13/00—Soles; Sole-and-heel integral units
- A43B13/02—Soles; Sole-and-heel integral units characterised by the material
- A43B13/04—Plastics, rubber or vulcanised fibre
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/049—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using steam or damp
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
- B29D35/122—Soles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L11/00—Compositions of homopolymers or copolymers of chloroprene
Abstract
The invention discloses a rubber sole for kitchen, a preparation method thereof and a secondary vulcanization process, wherein the rubber sole comprises 14-18 parts of natural rubber, 82-86 parts of synthetic rubber, 3.5-4.5 parts of vulcanizing agent, 2-2.8 parts of vulcanization accelerator, 7-9 parts of vulcanization activator, 10-15 parts of solid softener, 3-5 parts of liquid softener and 60-68 parts of reinforcing agent. The rubber sole for kitchen use improves the original sole sizing material formula, improves the oil resistance of the rubber sole, ensures that the oil resistance and the service life of the rubber sole accord with the use in kitchen environment, and can improve the service life of rubber outsole rubber shoes by more than 3 times in the kitchen environment.
Description
Technical Field
The invention relates to the technical field of shoemaking, in particular to a rubber sole for kitchen, a preparation method and a secondary vulcanization process thereof.
Background
Generally, the rubber outsole of the rubber shoe has low oil resistance, the rubber shoe can only meet the requirements of common wearing, and due to the influence of factors such as rubber aging, production conditions and manufacturing process limitations, the rubber sole has short service life in an oily environment and is not suitable for being used in a kitchen environment.
The reasons for influencing the oil resistance of the rubber shoe outsole mainly include three factors of rubber compound formula design, rubber compound processing technology and sole vulcanization technology.
In the aspect of formula design of the rubber material, the full nitrile rubber component can be adopted in the rubber material, so that the durable oil performance of the rubber is realized, but the wet-skid resistance of the rubber product is lower, the capability of guaranteeing the personal safety of the product is reduced, and meanwhile, the application of the scheme in the molded rubber sole is limited because the vulcanized nitrile rubber has poor mutual viscosity and does not have a proper adhesive.
From the aspect of formula design, the vulcanization depth of the rubber is too high, the black durable rubber is not beneficial to forming and bonding, the molded oil-proof rubber shoe is difficult to successfully manufacture, and the richness of the product style is limited.
In terms of the shore hardness of vulcanized rubber, when the shore hardness is greater than 75 degrees, it is advantageous to improve the oil resistance of the rubber, but this causes a reduction in the wearing comfort of the shoe.
In addition, the production process of the molded sole rubber shoes determines that the rubber soles must be subjected to secondary vulcanization, and in the process of vulcanization and crosslinking of rubber, the rubber molecules have the probability of one more aging and degradation every time when the rubber is vulcanized, so that the performance of the rubber is greatly reduced. Therefore, the manufacturing conditions of the rubber soles needing primary and secondary vulcanization are strict, the factors influencing the performance of the rubber shoe outsoles are more, and the manufacturing difficulty is higher.
Disclosure of Invention
The invention aims to solve the technical problem that the oil resistance of the sole of the existing rubber shoe is poor, the oil resistance of the sole of the rubber shoe is improved by designing a rubber material formula of the sole of the rubber shoe, processing conditions of the sole of the rubber shoe and a vulcanization process of the sole, and the rubber sole for the kitchen and the preparation method and the secondary vulcanization process thereof are provided.
In order to solve the technical problems, the invention adopts the following technical scheme: the rubber sole for the kitchen comprises, by weight, 14-18 parts of natural rubber, 82-86 parts of synthetic rubber, 3.5-4.5 parts of a vulcanizing agent, 2-2.8 parts of a vulcanization accelerator, 7-9 parts of a vulcanization activator, 10-15 parts of a solid softener, 3-5 parts of a liquid softener and 60-68 parts of a reinforcing agent.
The rubber material comprises, by weight, 16 parts of natural rubber, 84 parts of synthetic rubber, 4 parts of a vulcanizing agent, 2.4 parts of a vulcanization accelerator, 8 parts of a vulcanization activator, 12.5 parts of a solid softener, 4 parts of a liquid softener and 64 parts of a reinforcing agent.
3. The kitchen rubber shoe sole according to claim 1 or 2, wherein: also comprises 1-1.5 parts of anti-aging agent, 1-1.6 parts of wear-resisting agent and 0.5-1.5 parts of coloring agent.
4. A method for preparing a kitchen rubber shoe sole according to claim 1 or 2, characterized in that: the preparation method comprises the following steps of:
(1) plasticating: taking natural rubber, and carrying out thin pass on the natural rubber on an open rubber mixing mill at a roll distance of 0, and mixing until the Weibull plasticity degree is 0.45-0.50 to obtain plastified rubber;
(2) preparing materials: taking the reinforcing agent as a coarse material; the liquid softener is assembled in the open barrel to obtain the softener; mixing the vulcanization accelerator, the vulcanization activator and the solid softener together to obtain the intermediate material.
(3) Mixing: putting the plasticated rubber, the middle material and a half of the reinforcing agent obtained in the step (1) into a rubber mixing machine, mixing for 1-1.5 minutes at the temperature of 60-140 ℃ and under the pressure of 0.39-0.40 MPa, adding the rest reinforcing agent, continuously mixing for 3 ' 50-4 ' 20 ', adding a liquid softener, uniformly mixing, discharging to a flat machine, cooling, adding a vulcanizing agent, supplementing and turning to obtain mixed rubber, and scribing the mixed rubber and cooling to obtain a product B;
(4) heating and demolding: uniformly heating the product B at 45-55 ℃, and cutting into rubber sole rubber blank pieces for kitchen;
(5) bottom making: and vulcanizing the rubber material blank sheet of the rubber sole for kitchen for 3.5 to 4.5 minutes under the conditions of 150 to 155 ℃ and 20MPa of vulcanization pressure to prepare the rubber sole for kitchen.
5. The method of claim 4, wherein: 1-1.5 parts of anti-aging agent, 1-1.6 parts of wear-resisting agent and 0.5-1.5 parts of coloring agent are added into the medium material.
8. The secondary vulcanization process of the kitchen rubber shoe sole according to claim 1 or 2, characterized in that: the method comprises a first vulcanization bottom making process and a second vulcanization molding process, wherein the second vulcanization molding process is mixed gas hot vulcanization, the vulcanization temperature is 133-135 ℃, the working pressure is 0.38MPa, and the vulcanization time is 30 minutes.
The physical properties of the sole were examined according to national standards.
1. Feedstock and apparatus
1) The raw materials comprise natural rubber, synthetic rubber, a vulcanizing agent, a vulcanization accelerator, a vulcanization activator, a solid softener, a liquid softener, white carbon black, an anti-aging agent, a mold release agent and a coloring agent.
2) Equipment: 140 liter internal mixer, 250 ton plate vulcanizer (steam heating)
2. Experimental data
The test data are shown in tables 1 and 2
TABLE 1
TABLE 2
Table 2 (continuation)
| Test No | 17 | 18 | 19 | 20 | 21 | 22 |
| Natural glue | 16 | 16 | 16 | 16 | 16 | 16 |
| Synthetic glue | 84 | 84 | 84 | 84 | 84 | 84 |
| Vulcanizing agent | 4 | 4 | 4 | 3 | 5 | 6 |
| Vulcanization accelerationAgent for treating cancer | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 | 1.7 |
| Vulcanization activators | 8 | 8 | 8 | 8 | 8 | 8 |
| Solid softener | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 |
| Liquid softener | 4 | 4 | 4 | 4 | 4 | 4 |
| White carbon black | 64 | 64 | 64 | 64 | 64 | 64 |
| Anti-aging agent | 2.0 | 1.5 | 1.5 | 1.5 | 1.5 | 1.5 |
| Mold-resistant agent | 1.3 | 1.0 | 1.6 | 1.3 | 1.3 | 1.3 |
| Sole wear | 0.85 | 1.0 | 0.85 | 1.0 | 0.85 | 0.85 |
| Oil-proof sole | 5.5 | 6.9 | 5.5 | 6.9 | 5.5 | 5.5 |
4. Conclusion
As shown in tables 1 and 2, the formulation "16 parts of natural rubber, 84 parts of synthetic rubber, 4 parts of vulcanizing agent, 1.7 parts of vulcanization accelerator, 8 parts of vulcanization activator, 12.5 parts of solid softener, 4 parts of liquid softener, 64 parts of reinforcing agent, 1.5 parts of anti-aging agent and 1.3 parts of wear-resistant agent" has the best physical properties.
Experimental example II study of preparation method
1. Method of producing a composite material
The preparation of the rubber sole generally comprises four steps: plasticating, mixing, cutting and bottoming, wherein the plasticating effect and the mixing time are main parameters influencing various properties.
(1) Rubber plastication plasticity research:
TABLE 3
The test data in Table 3 show that the plasticity range of the plasticated rubber is between 0.45 and 0.50, the sole abrasion performance is the best, and the oil resistance and the process performance are balanced.
(2) The research of the mixing process comprises the following steps:
TABLE 5 Effect of mixing time on shoe sole wear and oil resistance
From Table 5, it can be seen that, in the mixing process, when the mixing time of the rubber compound and the master batch before adding the carbon black is preferably 1 to 1.5 minutes, and the net pressing time of the carbon black is between 4 '00' and 4 '20', the sole abrasion performance and the oil resistance are the best
3. Conclusion
(1) The plasticity range of the plasticated rubber of the rubber sole rubber for the kitchen is 0.45-0.50.
(2) The sole rubber adopts a plastication and rubber compound process to ensure the wear resistance and the oil resistance.
(3) The key time of mixing is controlled to be that the mixing time of plasticated rubber and the middle material before adding the white carbon black is 1 to 1.5 minutes, and the net pressing time of the white carbon black is 4 '00 to 4' 20 percent.
Experimental example III study of vulcanization Process
First, bottom-making sulfuration process
1. Method of producing a composite material
The rubber sole for kitchen use is vulcanized by using a mold at a vulcanization temperature. The contributions of the vulcanization temperature and the vulcanization time to the wear resistance and the oil resistance of the sole are researched.
2. The test results are shown in Table 6.
TABLE 6 Experimental data
Conclusion
The vulcanization temperature has great influence on the wear resistance and oil resistance of the sole, when the vulcanization temperature of the mold is lower than 150 ℃ or higher than 155 ℃, the wear resistance and oil resistance of the rubber shoe outsole are deteriorated due to low temperature and time change, and the Akron abrasion volume is 0.85cm3More than 1.61km, the oil resistance is more than 6 percent, and the rubber shoe sole can only reach the common level and cannot meet the requirements of the rubber shoe sole on the wear resistance and the oil resistance. When the temperature of the mold is between 151 and 155 ℃, the wear resistance of the outsole can reach 0.85cm3Less than 1.61km and less than 5.5 percent of oil resistance, and realizes the unification of the grinding performance and the oil resistance. Therefore, the vulcanization temperature of the mold is regulated to be 150-155 ℃, the influence of the vulcanization temperature of the mold on the wear resistance and the oil resistance of the vulcanized outer sole rubber is reduced, and the wear resistance and the oil resistance of the rubber are relatively stable and have relatively low volatility.
Second and second vulcanization molding process
1. Method of producing a composite material
The rubber sole for kitchen use produced by one-time vulcanization molding under the same process condition is manufactured into two double soles, wherein one double sole is put into a steaming tank to be vulcanized again (namely, the second vulcanization), and the oil resistance indexes are detected by comparison.
Note: the second vulcanization molding process is mixed gas hot vulcanization, wherein the vulcanization temperature is 133 ℃ and 135 ℃, the working pressure is 0.38MPa, and the vulcanization time is 30 minutes.
2. Feedstock and apparatus
(1) Raw materials: and (5) making the vulcanized sole.
(2) Equipment: a mixed gas vulcanizing tank which adopts air and water vapor as a vulcanizing medium.
3. Experimental data
3.1 Effect of vulcanization Molding Process on oil resistance
3.1.1 Effect of vulcanization Molding Process on oil resistance in Table 7
TABLE 7
| Numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Oil resistance of molded vulcanized base (%) | 4.8 | 5.2 | 5.5 | 5.8 | 6.6 | 8.5 | 12 |
| Oil resistance (%) | 4.8 | 5.2 | 5.6 | 5.9 | 7.0 | 10 | 15 |
| Rate of change (%) | 0 | 0 | 1.7 | 1.7 | 6 | 17 | 25 |
3.1.2 nodules
The oil resistance of the sole can be reduced after each polysulfide, the oil resistance of the rubber sole can reach below 6% after the rubber sole is vulcanized by a mould, and the oil resistance can be reduced by a small proportion after the rubber sole is vulcanized by a steaming tank once, so that the rubber sole meets the manufacturing requirements. Only if the oil resistance data before the steam pot vulcanization (namely molding vulcanization) is realized is not higher than 6%, the oil resistance can be ensured to meet the design requirement after the steam pot vulcanization (namely the second vulcanization).
3.2 Effect of vulcanization temperature and time on oil resistance
3.2.1 Effect of rubber overshoes vulcanization temperature on oil resistance
TABLE 8
The test results in Table 8 show that the rubber shoe molding vulcanization temperature is 133-135 ℃, which can ensure that the oil resistance of the oil-resistant sole rubber is basically changed.
3.2.2 Effect of rubber overshoes vulcanization time on oil resistance
TABLE 9
The test results in Table 8 show that the rubber shoe can be molded and vulcanized for 30 minutes to ensure that the oil resistance of the oil-resistant sole rubber is basically changed.
Compared with the prior art, the invention provides the formula and the preparation method of the rubber material of the rubber sole for kitchen use, the self external force resistance of rubber is enhanced, the wear resistance of the rubber is improved, the service life of the outsole is greatly prolonged, the requirements of service life and oil resistance are fundamentally realized, and the rubber compound in the invention has the processing advantages of quick vulcanization, excellent process performance, simple operation and the like in the process of manufacturing the sole. The rubber material of the rubber sole for kitchen use is not mixed with plastic components, and the sole is made of chloroprene rubber as a main material, so that the oil resistance (mass increase percentage of 46# engine oil soaked for 24 hours) is 5.5 percent, the oil resistance requirement of the rubber sole for kitchen use is met, and the service life of the rubber sole is prolonged by more than 3 times. The wearing comfort of the rubber sole of the kitchen shoe is well ensured.
Detailed Description
The formula example and the preparation method of the rubber sole for kitchen comprise the following steps:
1) the formula is as follows: 16 parts of natural rubber, 84 parts of synthetic rubber, 4 parts of vulcanizing agent, 1.7 parts of vulcanization accelerator, 8 parts of vulcanization activator, 12.5 parts of solid softener, 4 parts of liquid softener, 64 parts of reinforcing agent, 1.5 parts of anti-aging agent, 1.3 parts of wear-resisting agent and 1.0 part of coloring agent.
2) The preparation method of the rubber sole for kitchen comprises the following steps:
(1) plasticating: taking rubber, and carrying out thin pass on the rubber on an open rubber mixing mill at a distance of 0 roller until the Weibull plasticity is 0.45-0.50 to obtain plastified rubber;
(2) preparing materials: metering the reinforcing agent to obtain a coarse material; the liquid softener is assembled in the open barrel to obtain the softener; and mixing the vulcanization accelerator, the vulcanization activator, the anti-aging agent, the wear-resisting agent, the coloring agent and the solid softener together to obtain the intermediate material.
(3) Mixing: putting the plasticated rubber, the middle material and a half of the reinforcing agent obtained in the step (1) into a rubber mixing machine, mixing for 1c1.5 minutes under the conditions of the temperature of 60-140 ℃ and the pressure of 0.39-0.40 MPa, adding the rest reinforcing agent, continuously mixing for 3 ' 50-4 ' 20 ', adding a liquid softener, uniformly mixing, discharging to a flat machine, cooling, adding a vulcanizing agent, supplementing and turning to obtain mixed rubber, scribing the mixed rubber, and cooling to obtain a product B;
(4) heating and demolding: uniformly heating the product B at 45-55 ℃, and cutting into rubber sole rubber blank pieces for kitchen;
(5) bottom making: and vulcanizing the rubber material blank sheet of the rubber sole for kitchen for 3.5 to 4.5 minutes under the conditions of 150 to 155 ℃ and 20MPa of vulcanization pressure to prepare the rubber sole for kitchen.
Claims (6)
1. A rubber sole for kitchen is characterized in that: the rubber composition comprises, by weight, 14-18 parts of natural rubber, 82-86 parts of synthetic rubber, 3.5-4.5 parts of a vulcanizing agent, 2-2.8 parts of a vulcanization accelerator, 7-9 parts of a vulcanization activator, 10-15 parts of a solid softener, 3-5 parts of a liquid softener and 60-68 parts of a reinforcing agent.
2. The kitchen rubber shoe sole according to claim 1, wherein: the rubber material comprises, by weight, 16 parts of natural rubber, 84 parts of synthetic rubber, 4 parts of a vulcanizing agent, 2.4 parts of a vulcanization accelerator, 8 parts of a vulcanization activator, 12.5 parts of a solid softener, 4 parts of a liquid softener and 64 parts of a reinforcing agent.
3. The kitchen rubber shoe sole according to claim 1 or 2, wherein: also comprises 1-1.5 parts of anti-aging agent, 1-1.6 parts of wear-resisting agent and 0.5-1.5 parts of coloring agent.
4. A method for preparing a kitchen rubber shoe sole according to claim 1 or 2, characterized in that: the preparation method comprises the following steps of:
(1) plasticating: taking natural rubber, and carrying out thin pass on the natural rubber on an open rubber mixing mill at a roll distance of 0, and mixing until the Weibull plasticity degree is 0.45-0.50 to obtain plastified rubber;
(2) preparing materials: taking the reinforcing agent as a coarse material; the liquid softener is assembled in the open barrel to obtain the softener; mixing the vulcanization accelerator, the vulcanization activator and the solid softener together to obtain the intermediate material.
(3) Mixing: putting the plasticated rubber, the middle material and a half of the reinforcing agent obtained in the step (1) into a rubber mixing machine, mixing for 1-1.5 minutes at the temperature of 60-140 ℃ and under the pressure of 0.39-0.40 MPa, adding the rest reinforcing agent, continuously mixing for 3 ' 50-4 ' 20 ', adding a liquid softener, uniformly mixing, discharging to a flat machine, cooling, adding a vulcanizing agent, supplementing and turning to obtain mixed rubber, and scribing the mixed rubber and cooling to obtain a product B;
(4) heating and demolding: uniformly heating the product B at 45-55 ℃, and cutting into rubber sole rubber blank pieces for kitchen;
(5) bottom making: and vulcanizing the rubber material blank sheet of the rubber sole for kitchen for 3.5 to 4.5 minutes under the conditions of 150 to 155 ℃ and 20MPa of vulcanization pressure to prepare the rubber sole for kitchen.
5. The method of claim 4, wherein: 1-1.5 parts of anti-aging agent, 1-1.6 parts of wear-resisting agent and 0.5-1.5 parts of coloring agent are added into the medium material.
6. The secondary vulcanization process of the kitchen rubber shoe sole according to claim 1 or 2, characterized in that: the method comprises a first vulcanization bottom making process and a second vulcanization molding process, wherein the second vulcanization molding process is mixed gas hot vulcanization, the vulcanization temperature is 133-135 ℃, the working pressure is 0.38MPa, and the vulcanization time is 30 minutes.
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|---|---|---|---|---|
| US6589630B1 (en) * | 1995-03-23 | 2003-07-08 | William R. Crow | Performance enhancing shoe components and methods |
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| CN102796292A (en) * | 2012-08-09 | 2012-11-28 | 际华三五三七制鞋有限责任公司 | High-elongation wear-resistant oil-resistant rubber sole and preparation method thereof |
| CN103156330A (en) * | 2011-12-09 | 2013-06-19 | 际华三五一七橡胶制品有限公司 | Jie Fang rubber shoes with grease proofing function |
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2019
- 2019-09-27 CN CN201910927632.5A patent/CN110628103A/en active Pending
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Application publication date: 20191231 |