CN113861521A - Flame-retardant rubber compound for surrounding edge of shoes and preparation method thereof - Google Patents
Flame-retardant rubber compound for surrounding edge of shoes and preparation method thereof Download PDFInfo
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- CN113861521A CN113861521A CN202111187965.2A CN202111187965A CN113861521A CN 113861521 A CN113861521 A CN 113861521A CN 202111187965 A CN202111187965 A CN 202111187965A CN 113861521 A CN113861521 A CN 113861521A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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Abstract
The invention discloses flame-retardant rubber compound for a surrounding edge of a shoe. The natural rubber and the chloroprene rubber are used as framework materials, the physical properties of rubber materials are guaranteed by adding the reinforcing filler and the softener, the service life of the rubber shoe surrounding edge and the technological operation performance and the bonding performance are guaranteed, wherein the bonding strength reaches 4.5N/mm, and the high-efficiency flame retardant decabromodiphenyl ether, chlorinated paraffin, zinc borate and aluminum hydroxide are used as a flame retardant system together, so that excellent flame retardant performance is provided for products; the flame-retardant grade can reach UL94V-0 grade, and the self-extinguishing requirement in a vertical combustion test is met. The method is simple, low in cost and good in using effect, and ensures that the rubber shoe surrounding edge meets the use requirements of forest firefighters.
Description
Technical Field
The invention relates to rubber and a preparation method thereof, in particular to flame-retardant rubber compound for a surrounding edge of a shoe and a preparation method thereof.
Background
As cloth cover rubber shoes with flame retardant function, main users of the cloth cover rubber shoes generally belong to forest fire prevention working categories, and under abnormal scenes such as rescue and fire extinguishment caused by forest fire, the shoes and clothes worn by forest fire prevention and rescue personnel usually contact with flame or a burning body in a short time, and the chances that the shoes touch the burning body are high, so that the surrounding edge rubber body for the shoes used by the forest fire prevention personnel is required to have proper flame retardant capability, namely, the protective performance reduction caused by continuous burning of the surrounding edge rubber body of the shoes can be prevented on the premise of having enough flame retardant performance. Due to the particularity of the working environment of forest protection personnel, the shoe surrounding edge glue is required to have enough service performance.
Generally, pure chloroprene rubber is adopted as a main material of the flame-retardant shoe surrounding edge rubber compound, and the flame-retardant property of the flame-retardant shoe surrounding edge rubber compound has an outstanding protection advantage. But due to the characteristics of the chloroprene rubber, the rubber material for shoes has poor processing performance, low stability and short service life of the processed flame-retardant rubber shoes. And the cost is always high because the bonding is difficult and the production yield is seriously influenced.
The importance of the development of natural rubber flame retardant materials:
with the expansion of the application field of natural rubber and the higher requirement on the flame retardant property of rubber products, the development and application of natural rubber flame retardant products become more and more important. The natural rubber has an extreme oxygen index of about 17, and belongs to an extremely flammable material. The rubber shoe surrounding edge taking the natural rubber and the cis-butadiene rubber as a combined system has excellent comprehensive performance, and has great practical significance in researching the flame resistance of the carbon black reinforced rubber surrounding edge.
In the process of manufacturing the rubber for flame-retardant shoes, the natural rubber is filled with the flame retardant, which is an optimal scheme and has the advantages of easy forming and processing, low cost and long service life of rubber shoes. However, inorganic materials of antimony trioxide and aluminum hydroxide are used as flame retardants, and the flame retardant capability is limited, so that the inorganic materials are required to be used in a formula in a large amount, which causes the problems of great reduction of the physical properties of rubber, formation of abnormal quality problems such as rubber blooming and the like, rubber shoes are not durable to wear, have more three wastes, are not environment-friendly, and have small use value and low application range.
The blend is researched by combining the advantages of the chloroprene rubber and the natural rubber, adopting the natural rubber as a main body and the chloroprene rubber as auxiliary flame retardance, so as to achieve the characteristics of excellent flame retardance, good bonding effect, high production efficiency, proper cost and long service life of products.
Disclosure of Invention
The purpose of the invention is: the flame-retardant rubber compound for the surrounding edge of the flame-retardant shoe and the preparation method thereof are provided, the flame-retardant performance of the prepared shoe edge is good, the fire can be prevented from being transmitted by liquid drops, the service life of a rubber shoe product is long, the manufacturing process is simple and convenient, and the defects in the prior art are overcome.
The invention is realized by the following steps: the flame-retardant surrounding edge rubber compound for the shoes comprises, by weight, 80-85 parts of No. 2 standard rubber, 15-20 parts of SN121 type chloroprene rubber, 1.9-2.1 parts of sulfur, 3-4 parts of an accelerator, 7-8 parts of a vulcanization activator, 0.5-0.7 part of a release agent, 33-37 parts of a reinforcing agent, 10-14 parts of a softener, 70-80 parts of a mixed flame retardant and 1.0-2.0 parts of an anti-aging agent.
The rubber material comprises, by weight, 82 parts of 2# standard rubber, 18 parts of SN121 type chloroprene rubber, 2 parts of sulfur, 3.5 parts of an accelerator, 8 parts of a vulcanization activator, 0.6 part of a release agent, 35 parts of a reinforcing agent, 12 parts of a softener, 75 parts of a mixed flame retardant and 1.5 parts of an anti-aging agent.
Every 3.5 parts of accelerator consists of 0.8 part of accelerator DM, 0.3 part of accelerator NA-22, 2.0 parts of accelerator CBS and 0.4 part of accelerator D.
Every 8 parts of vulcanization activator comprises 3 parts of tertiary stearic acid, 4 parts of nano zinc oxide and 1 part of light magnesium oxide.
Every 12 parts of softener consists of 10 parts of dibutyl phthalate and 2 parts of solid coumarone; every 75 parts of the mixed flame retardant consists of 20 parts of decabromodiphenyl ether, 15 parts of aluminum hydroxide, 25 parts of chlorinated paraffin-70 and 15 parts of zinc borate.
Each 35 parts of the reinforcing agent consists of 15 parts of carbon black N220 and 20 parts of pottery clay.
Every 1.5 parts of the anti-aging agent consists of 1.0 part of anti-aging agent CD and 0.5 part of anti-aging agent 4010 NA; the anti-scorching agent also comprises 0.1-0.3 part of anti-scorching agent which is salicylic acid.
A preparation method of flame-retardant rubber compound for the surrounding edge of a shoe comprises the following steps:
1) preparing a carbon black master batch: adding natural rubber, carbon black in a reinforcing agent, solid coumarone in a softening agent, stearic acid in a vulcanization activator and light magnesium oxide into an internal mixer, pressing and mixing rubber for 4-5 minutes, lifting a top bolt to scrape rubber when the current load of the internal mixer is reduced to 220A, sending overflowing materials at the mouth of the internal mixer into an internal mixing chamber, finishing scraping within 15-25 seconds, adding half of dibutyl phthalate in the softening agent within the next 30 seconds, returning the top bolt to the right position, continuing to press and mix, pressing and mixing for 3.5-4 minutes after the load of the internal mixer is lifted, returning the load of the internal mixer to 160A for discharging, and obtaining masterbatch;
2) preparing rubber compound: standing the master batch for 12 hours, adding the master batch, 15 parts of SN121 chloroprene rubber and argil in a mixed flame retardant, a middle material and a reinforcing agent into an internal mixer, pressing for 50-65 seconds, adding the mixed flame retardant, pressing for 3-5 minutes, lifting a top bolt, scraping rubber, pressing for 2 minutes, adding the other half of dibutyl phthalate in a softening agent when the sound of eating is suppressed due to rubber material friction in the internal mixer, performing rubber mixing for 1 minute after the load rises to 200A, discharging, adding sulfur into the discharged rubber material on an open rubber mixer, and uniformly turning to obtain a finished product.
The medium materials are an accelerator, nano zinc oxide in a vulcanization activator, a release agent, an anti-aging agent and a scorch retarder.
The comparison standards adopted by the invention are as follows:
the UL94 fire rating is 94HB, 94V, 94-5V.
A) Grade 94 HB: i.e. when the test piece is ignited in a horizontal mode, 1) the thickness of the test piece is less than 3.05mm, and the burning speed is less than 76.2 mm/min; 2) the thickness of the test piece is 3.05-12.7 mm, and the burning speed is less than 38.1 mm/min; this is a 94HB level minimum requirement.
B)94V level: the test piece can reach the following standard when being vertically burnt, and can be divided into three stages of V-0, V-1 and V-2. Wherein
V-0 level: when each flame was removed, the test piece ignited no more than 10 seconds and no sparks dropped to surgical cotton 305mm from the test piece to ignite the ignition point and no residual flame for more than 30 seconds.
V-1 grade: the same as V-0, except that the test piece had to be extinguished within 30 seconds and had no residual combustion after 60 seconds.
V-2 level: same as V-0 except that there are starred drops that catch fire on the dried cotton.
94V-0 level: the flame does not support combustion for 15 seconds (1000BTU) and can be automatically fried and extinguished;
94V-1 level: the flame dropped for 30 seconds (1000BTU), but no flame was generated.
94V-2 level: the flame man will drop in 30 seconds (1000BTU), has flame, but will not ignite cotton, and will self-extinguish.
94 HB: OBTU is almost non-fire-resistant.
The flame retardant grade is gradually increased from HB, V-2, V-1 to V-0:
1) HB: the most peripheral flame retardant rating in the UL94 standard. Requiring a burn rate of less than 40 mm per minute for samples 3 to 13 mm thick; a sample less than 3 mm thick with a burning rate less than 70 mm per minute; or extinguished before the 100 mm mark.
2) V-2: after two 10 second burn tests on the samples, the flame extinguished within 60 seconds. There may be combustion products falling.
3) V-1: after two 10 second burn tests on the samples, the flame extinguished within 60 seconds. No combustible material can fall off.
4) V-0: after two 10 second burn tests on the samples, the flame extinguished within 30 seconds. No combustible material can fall off.
The ingredients are combined with each other, so that the ingredients have positive effects on the product performance, and the method comprises the following steps:
1. wear resistance: the elongation of vulcanized rubber is improved by reinforcing the filled NR/SN combination system and matching with solid coumarone and dibutyl phthalate, the wear resistance of the vulcanized rubber is improved, and the service life of a product is greatly prolonged (Table 1).
TABLE 1
The vulcanized rubber has the advantages that the vulcanized rubber has the optimal physical and mechanical properties, good process performance, good wear resistance, optimal comprehensive performance and longest service life (note that the service life of common rubber shoes is 30-45 days under test conditions), and the flame resistance meets the requirements, wherein the vulcanized rubber comprises 82 parts of No. 2 standard rubber, 18 parts of SN121 chloroprene rubber, 15 parts of N220 carbon black, 2 parts of solid coumarone, 10 parts of dibutyl phthalate and 20 parts of pottery clay. Meanwhile, the adhesive strength is more than 4.2 KN/m.
2. Optimizing the system ratio of the accelerator and the anti-aging agent to obtain 3.5 parts of accelerator, namely 0.8 part of accelerator DM, 0.3 part of accelerator NA-22, 2.0 parts of accelerator CBS and 0.4 part of accelerator D; 1.0 part of anti-aging agent CD and 0.5 part of anti-aging agent 4010 NA; 3 '10-3' 30 of the vulcanization starting point at 143 ℃ cooperatively form an optimal network structure, thereby realizing wear resistance and high elasticity.
TABLE 2 optimization of accelerators and anti-aging systems
As can be seen from Table 2, the optimum amounts of accelerator and antioxidant are: 0.8 part of DM, 0.3 part of NA-22, 2.0 parts of CBS, 0.4 part of D, 1.0 part of CD and 0.5 part of 4010 NA.
3. And (4) matching the vulcanizing agent with the active agent.
TABLE 3 optimized sulfide dosage vs. active agent Performance
As shown in Table 3, the process performance safety, wear resistance and flame retardant effect of the rubber compound using 2.0 parts of sulfur, 4 parts of nano zinc oxide, 3 parts of stearic acid and 1 part of light magnesium oxide are all in good states.
4. Flame retardant ratio study
TABLE 4 COMPARATIVE PERFORMANCE TEST TABLE FOR FIRE-RETARDANT
The results in table 4 show that the optimal flame retardant ratio is: 20 parts of decabromodiphenyl ether, 15 parts of aluminum hydroxide, 25 parts of chlorinated paraffin-70 and 15 parts of zinc borate.
The physical properties of the product are obtained through a series of researches: the tensile strength is more than 13.5Mpa, the elongation at break is more than 676%, and the Akron abrasion is less than 0.71cm3The flame retardant rating of the flame retardant adhesive reaches UL94V-0 grade, and the flame retardant adhesive has the advantages of 1.61km, 4.5KN/m adhesive strength and high flame retardant rating.
Due to the adoption of the technical scheme, compared with the prior art, the natural rubber SN121 type chloroprene rubber is mixed to be used as a main material, the physical properties of rubber materials are guaranteed by adding the reinforcing agent and the softening agent, so that the product has the advantages of wear resistance and the like, the service life of the rubber shoe surrounding edge is guaranteed, and the high-efficiency flame retardant decabromodiphenyl ether, chlorinated paraffin, zinc borate and aluminum hydroxide are jointly used as a flame retardant system, so that excellent flame retardant property is provided for the product; the flame-retardant rubber can generate a carbon layer during combustion to adsorb molten and ignited polymers, can prevent liquid drops from transmitting fire, overcomes the defect that the conventional NR + SBR + BR rubber compound is extremely easy to combust, has the flame-retardant grade reaching UL94V-0 grade, and meets the self-extinguishing requirement in a vertical combustion test. The method is simple, low in cost and good in using effect.
Detailed Description
Example 1 of the invention: the flame-retardant shoe surrounding edge rubber compound comprises, by weight, 82 parts of No. 2 standard rubber, 18 parts of chloroprene rubber SN121, 2 parts of sulfur, 3.5 parts of an accelerator (3.5 parts of the accelerator comprise 0.8 part of an accelerator DM, 0.3 part of an accelerator NA-22, 2.0 parts of an accelerator CBS and 0.4 part of an accelerator D), 8 parts of a vulcanization activator (8 parts of the vulcanization activator comprise 3 parts of tertiary stearic acid, 4 parts of nano zinc oxide and 1 part of light magnesium oxide), 0.6 part of a mold release agent, 35 parts of a reinforcing agent (35 parts of the reinforcing agent comprise 15 parts of carbon black N220 and 20 parts of pottery clay), 12 parts of a softener (12 parts of the softener comprise 10 parts of dibutyl phthalate and 2 parts of solid coumarone), 75 parts of a mixed flame retardant (75 parts of the mixed flame retardant comprise 20 parts of decabromodiphenyl ether, 10 parts of aluminum hydroxide, 25 parts of chlorinated paraffin (-70), 15 parts of zinc borate), 1.5 parts of anti-aging agent and 0.2 part of scorch retarder.
A preparation method of flame-retardant rubber compound for surrounding edges of shoes,
1) preparing a master batch: adding 82 parts of natural rubber, 3 parts of stearic acid, 15 parts of carbon black and 2 parts of solid coumarone into an internal mixer, pressing and mixing rubber for 4-5 minutes, lifting a top bolt to scrape rubber when the current load of the rubber mixer is reduced to 220A, sending an overflowing material at the mouth of the internal mixer into an internal mixing chamber, finishing scraping within 15-25 seconds, adding 5 parts of dibutyl phthalate within next 30 seconds, returning the top bolt to the right position, continuing to press, pressing and mixing for 3.5-4 minutes after the load of the rubber mixer is lifted, so that the load of the rubber mixer is increased to more than 160A, and discharging to obtain masterbatch;
2) preparing rubber compound: standing the master batch for 12 hours, adding the master batch, 18 parts of SN121 chloroprene rubber, a mixed flame retardant and a medium material (the medium material comprises an accelerator, 4 nanometer zinc oxide, 0.6 part of a release agent, 1.5 parts of an anti-aging agent and 0.2 part of an anti-scorching agent) into an internal mixer, after 50-65 seconds of pressure refining, adding the mixed flame retardant, pressure refining for 3-5 minutes, lifting a top plug to scrape rubber, then pressure refining for 2 minutes, when the inside of the internal mixer generates a plotter sound due to rubber material friction, adding 5 parts of dibutyl phthalate, after the load rises to 200A, mixing for 1 minute, discharging, adding 2 parts of sulfur into the discharged rubber material on an open rubber mixer, and uniformly mixing to obtain a finished product.
Example 2 of the invention: the flame-retardant rubber compound for the surrounding edge of the shoes comprises, by weight, 80 parts of No. 2 standard rubber, 20 parts of chloroprene rubber SN121, 2.1 parts of sulfur, 4 parts of an accelerator (4 parts of the accelerator consist of 1 part of an accelerator DM, 0.4 part of an accelerator NA-22, 2.0 parts of an accelerator CBS and 0.6 part of an accelerator D), 7.4 parts of a vulcanization activator (7.4 parts of the vulcanization activator consist of 3 parts of three-stage stearic acid, 3.4 parts of nano zinc oxide and 1 part of light magnesium oxide), 0.6 part of a mold release agent, 33 parts of a reinforcing agent (33 parts of the reinforcing agent consist of 14 parts of carbon black N220 and 19 parts of pottery clay), 12 parts of a softener (12 parts of the softener consist of 10 parts of dibutyl phthalate and 2 parts of solid coumarone), and 80 parts of a mixed flame retardant (80 parts of the mixed flame retardant consist of 21 parts of decabromodiphenyl ether, 16 parts of aluminum hydroxide, 26 parts of chlorinated (-70), 17 parts of zinc borate), 1.2 parts of anti-aging agent and 0.3 part of scorch retarder.
The preparation method is the same as example 1.
Example 3 of the invention: the flame-retardant shoe surrounding edge rubber compound comprises, by weight, 85 parts of No. 2 standard rubber, 15 parts of chloroprene rubber SN121, 1.9 parts of sulfur, 3 parts of an accelerator (each 3 parts of the accelerator comprises 0.7 part of an accelerator DM, 0.2 part of an accelerator NA-22, 1.8 parts of an accelerator CBS and 0.3 part of an accelerator D), 7 parts of a vulcanization activator (each 7 parts of the vulcanization activator comprises 3 parts of tertiary stearic acid, 3 parts of nano zinc oxide and 1 part of light magnesium oxide), 0.6 part of a mold release agent, 37 parts of a reinforcing agent (each 37 parts of the reinforcing agent comprises 16 parts of carbon black N220 and 21 parts of pottery clay), 12 parts of a softener (each 12 parts of the softener comprises 10 parts of dibutyl phthalate and 2 parts of solid coumarone), 70 parts of a mixed flame retardant (each 70 parts of the mixed flame retardant comprises 18 parts of decabromodiphenyl ether, 14 parts of aluminum hydroxide, 23 parts of chlorinated paraffin (-70), 15 parts of zinc borate, 1.2 parts of anti-aging agent and 0.1 part of scorch retarder.
The preparation method is the same as example 1.
Claims (9)
1. The flame-retardant rubber compound for the surrounding edge of the shoe is characterized in that: the rubber material comprises, by weight, 80-85 parts of No. 2 standard rubber, 15-20 parts of SN121 type chloroprene rubber, 1.9-2.1 parts of sulfur, 3-4 parts of an accelerator, 7-8 parts of a vulcanization activator, 0.5-0.7 part of a release agent, 33-37 parts of a reinforcing agent, 10-14 parts of a softener, 70-80 parts of a mixed flame retardant and 1.0-2.0 parts of an anti-aging agent.
2. The flame-retardant surrounding edge mix for shoes according to claim 1, wherein: the rubber material comprises, by weight, 82 parts of 2# standard rubber, 18 parts of SN121 type chloroprene rubber, 2 parts of sulfur, 3.5 parts of an accelerator, 8 parts of a vulcanization activator, 0.6 part of a release agent, 35 parts of a reinforcing agent, 12 parts of a softener, 75 parts of a mixed flame retardant and 1.5 parts of an anti-aging agent.
3. The flame-retardant surrounding edge mix for shoes according to claim 1 or 2, characterized in that: every 3.5 parts of accelerator consists of 0.8 part of accelerator DM, 0.3 part of accelerator NA-22, 2.0 parts of accelerator CBS and 0.4 part of accelerator D.
4. The flame-retardant surrounding edge mix for shoes according to claim 1 or 2, characterized in that: every 8 parts of vulcanization activator comprises 3 parts of tertiary stearic acid, 4 parts of nano zinc oxide and 1 part of light magnesium oxide.
5. The flame-retardant surrounding edge mix for shoes according to claim 1 or 2, characterized in that: every 12 parts of softener consists of 10 parts of dibutyl phthalate and 2 parts of solid coumarone; every 75 parts of the mixed flame retardant consists of 20 parts of decabromodiphenyl ether, 15 parts of aluminum hydroxide, 25 parts of chlorinated paraffin-70 and 15 parts of zinc borate.
6. The flame-retardant surrounding edge mix for shoes according to claim 1 or 2, characterized in that: each 35 parts of the reinforcing agent consists of 15 parts of carbon black N220 and 20 parts of pottery clay.
7. The flame-retardant surrounding edge mix for shoes according to claim 1 or 2, characterized in that: every 1.5 parts of the anti-aging agent consists of 1.0 part of anti-aging agent CD and 0.5 part of anti-aging agent 4010 NA; the anti-scorching agent also comprises 0.1-0.3 part of anti-scorching agent which is salicylic acid.
8. The preparation method of the flame-retardant rubber compound for the surrounding edge of the shoe is characterized by comprising the following steps of: the method comprises the following steps:
1) preparing a carbon black master batch: adding natural rubber, carbon black in a reinforcing agent, solid coumarone in a softening agent, stearic acid in a vulcanization activator and light magnesium oxide into an internal mixer, pressing and mixing rubber for 4-5 minutes, lifting a top bolt to scrape rubber when the current load of the internal mixer is reduced to 220A, sending overflowing materials at the mouth of the internal mixer into an internal mixing chamber, finishing scraping within 15-25 seconds, adding half of dibutyl phthalate in the softening agent within the next 30 seconds, returning the top bolt to the right position, continuing to press and mix, pressing and mixing for 3.5-4 minutes after the load of the internal mixer is lifted, returning the load of the internal mixer to 160A for discharging, and obtaining masterbatch;
2) preparing rubber compound: standing the master batch for 12 hours, adding the master batch, 15 parts of SN121 chloroprene rubber and argil in a mixed flame retardant, a middle material and a reinforcing agent into an internal mixer, pressing for 50-65 seconds, adding the mixed flame retardant, pressing for 3-5 minutes, lifting a top bolt, scraping rubber, pressing for 2 minutes, adding the other half of dibutyl phthalate in a softening agent when the sound of eating is suppressed due to rubber material friction in the internal mixer, performing rubber mixing for 1 minute after the load rises to 200A, discharging, adding sulfur into the discharged rubber material on an open rubber mixer, and uniformly turning to obtain a finished product.
9. The preparation method of the flame-retardant surrounding edge rubber compound for shoes according to claim 8, characterized by comprising the following steps: the medium materials are an accelerator, nano zinc oxide in a vulcanization activator, a release agent, an anti-aging agent and a scorch retarder.
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- 2021-10-12 CN CN202111187965.2A patent/CN113861521B/en active Active
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Address after: 550025 No. 1 Qingxi Road, Huaxi District, Guizhou, Guiyang Applicant after: Jihua Shoes Industry Co.,Ltd. Address before: 550025 No. 1 Qingxi Road, Huaxi District, Guizhou, Guiyang Applicant before: Jihua 3537 Co.,Ltd. |
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