CN110845787A - High-resilience modified EVA material, high-resilience EVA sole and manufacturing method thereof - Google Patents
High-resilience modified EVA material, high-resilience EVA sole and manufacturing method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0023—Use of organic additives containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0028—Use of organic additives containing nitrogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
- C08J9/0071—Nanosized fillers, i.e. having at least one dimension below 100 nanometers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2453/00—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2453/02—Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers of vinyl aromatic monomers and conjugated dienes
Abstract
The invention relates to a high-resilience modified EVA material, a high-resilience EVA sole and a manufacturing method thereof, belonging to the technical field of EVA materials. The high-resilience modified EVA material comprises the following raw materials in percentage by mass: 65-70% of EVA, 18-21% of rubber-plastic elastomer, 3-4.8% of talcum powder, 2-3% of wear-resisting agent, 0.5-0.7% of stearic acid, 1.5-1.6% of zinc oxide, 1.4-2.0% of bridging agent and 1-2% of foaming agent. The sole made of the EVA material has high rebound resilience and good wear resistance.
Description
Technical Field
The invention belongs to the technical field of EVA materials, and particularly relates to a high-resilience modified EVA material, a high-resilience EVA sole and a manufacturing method thereof.
Background
EVA is an elastomer obtained by copolymerizing an ethylene monomer and a vinyl acetate monomer, for short, of an ethylene-vinyl acetate copolymer. It is non-toxic, odorless and has good mechanical properties. The processing method can be processed into various EVA products by extrusion, injection, blow molding and the like, and the EVA products are widely applied to foaming shoe materials.
EVA has good softness and toughness, and the sole material that makes with it can give the sole excellent travelling comfort, and the major problem that EVA sole faced at present is: the poor elasticity and wear resistance of the shoe sole greatly limit the application of the shoe sole, and therefore, the modification of the EVA material to make the EVA material have high elasticity and good wear resistance has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-resilience modified EVA material, a high-resilience EVA sole and a manufacturing method thereof.
The invention adopts the following technical scheme:
the high-resilience modified EVA material comprises the following raw materials in percentage by mass: 65-70% of EVA, 18-21% of rubber-plastic elastomer, 3-4.8% of talcum powder, 2-3% of wear-resisting agent, 0.5-0.7% of stearic acid, 1.5-1.6% of zinc oxide, 1.4-2.0% of bridging agent and 1-2% of foaming agent.
According to the modified EVA material, EVA is matched with the rubber-plastic elastomer, the talcum powder, the wear-resisting agent, the stearic acid, the zinc oxide, the bridging agent and the foaming agent, and the foamed EVA material has a milky appearance, soft and smooth hand feeling, soft texture, higher rebound resilience and excellent wear resistance.
In some embodiments, the rubber-plastic elastomer is an SEBS elastomer, the SEBS elastomer has the characteristics of light weight, softness and good stretchability, and the SEBS elastomer is used together with EVA and other auxiliary materials, so that the foaming efficiency of the material in the foaming process can be effectively increased, the foaming time can be shortened, the elasticity of the EVA material can be effectively improved, and the self weight of the foamed sole can be reduced.
In some embodiments, the bridging agent is a mixture of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and dicumyl peroxide (DCP), the TAIC and the DCP are compounded according to a specific mass ratio, and under the combined action of a foaming agent, talcum powder, an anti-wear agent, stearic acid and zinc oxide, the quality of the foamed sole can be effectively improved, the sole is uniformly foamed, the surface is smooth and has no burrs, and the sole has superior quality.
In some embodiments, the flame-retardant sole material further comprises 0.5% -1% of nano aluminum hydroxide, wherein the nano aluminum hydroxide is an environment-friendly inorganic flame retardant, has good compatibility with bridging agents TAIC and DCP, EVA, rubber and plastic elastomers and other raw materials, is not easy to agglomerate, and has good flame retardance and excellent tensile property.
In some of these embodiments, the blowing agent is an AC blowing agent.
The invention also provides a preparation method of the high-resilience modified EVA material, which comprises the following steps:
step one, preparing materials: preparing the raw materials according to the mass ratio;
step two, carrying out densification: uniformly mixing EVA, rubber-plastic elastomer, talcum powder, stearic acid and zinc oxide, sequentially adding a wear-resisting agent, a bridging agent and a foaming agent, carrying out densification at the temperature of 115-125 ℃ for 15-25min, carrying out densification, granulation, vibration heat dissipation and storage to obtain the high-resilience modified EVA material.
In some of these embodiments, the temperature of the granulation in step two is 110 ℃.
The invention also provides a manufacturing method of the high-resilience EVA sole, which comprises the following steps: and (3) carrying out small foaming on the high-resilience modified EVA material to prepare a semi-finished product sole, then carrying out foaming molding on the semi-finished product sole by using a mold, and cooling to obtain the high-resilience EVA sole.
In some embodiments, the temperature during the small foaming is 188-190 ℃, and the foaming time is 440-460 s; the temperature of the mould during foaming molding is 160-180 ℃, and the foaming time is 695 and 705 s; the cooling time was 600 s. The small foaming is carried out in a mould, the weight of the raw materials needs to be accurately controlled, so that the ideal foaming multiplying power can be ensured, and the appearance and the quality of the shoe material can be ensured by controlling the foaming time and the temperature within the range.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the method comprises the following steps: according to the invention, EVA is matched with a rubber-plastic elastomer, talcum powder, a wear-resisting agent, stearic acid, zinc oxide, a bridging agent and a foaming agent, and the foamed and molded EVA has a milky appearance, soft and smooth hand feeling and soft texture, and has higher rebound resilience and excellent wear resistance;
secondly, the method comprises the following steps: the invention adopts the SEBS elastomer and the EVA as well as other auxiliary materials for use together, thereby effectively increasing the foaming efficiency of the material in the foaming process, shortening the foaming time, effectively improving the elasticity of the EVA material and reducing the dead weight of the foamed and molded sole;
thirdly, the method comprises the following steps: the invention adopts TAIC and DCP with specific mass ratio to carry out compounding, and can effectively improve the quality of the foamed sole under the combined action of the foaming agent, the talcum powder, the wear-resisting agent, the stearic acid and the zinc oxide, so that the sole is uniformly foamed, the surface is smooth and has no burrs, and the sole has superior quality.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention provides a high-resilience modified EVA material, which comprises the following raw materials in percentage by mass: 65-70% of EVA, 18-21% of rubber-plastic elastomer, 3-4.8% of talcum powder, 2-3% of wear-resisting agent, 0.5-0.7% of stearic acid, 1.5-1.6% of zinc oxide, 1.4-2.0% of bridging agent and 1-2% of foaming agent.
According to the modified EVA material, EVA is matched with the rubber-plastic elastomer, the talcum powder, the wear-resisting agent, the stearic acid, the zinc oxide, the bridging agent and the foaming agent, and the foamed EVA material has a milky appearance, soft and smooth hand feeling, soft texture, higher rebound resilience and excellent wear resistance.
In one embodiment, the rubber-plastic elastomer is an SEBS elastomer, the SEBS elastomer has the characteristics of light weight, softness and good stretchability, and the foaming efficiency of the material in the foaming process can be effectively increased, the foaming time can be shortened, the elasticity of an EVA material can be effectively improved, and the self weight of the foamed sole can be reduced by using the SEBS elastomer together with EVA and other auxiliary materials. (GB10N or SF70N, plastic source practice)
In one embodiment, the bridging agent is a mixture of 1, 3, 5-triallyl-s-triazine-2, 4, 6-trione (TAIC, halloysite chemical) and dicumyl peroxide (DCP, halloysite), TAIC and DCP in a specific mass ratio are compounded, and under the combined action of a foaming agent, talcum powder, an anti-wear agent, stearic acid and zinc oxide, the quality of the foamed sole can be effectively improved, the sole is uniformly foamed, the surface is smooth and has no burrs, and the sole has superior quality.
In one embodiment, the flame-retardant sole material further comprises 0.5% -1% of nano aluminum hydroxide, wherein the nano aluminum hydroxide is an environment-friendly inorganic flame retardant, has good compatibility with bridging agents TAIC and DCP, EVA, rubber and plastic elastomers and other raw materials, is not easy to generate agglomeration, and has good flame retardance and excellent tensile property.
In one embodiment, the blowing agent is an AC blowing agent (AC-3000H, Haili).
The invention also provides a preparation method of the high-resilience modified EVA material, which comprises the following steps:
step one, preparing materials: preparing the raw materials according to the mass ratio;
step two, carrying out densification: uniformly mixing EVA, rubber-plastic elastomer, talcum powder, stearic acid and zinc oxide, sequentially adding a wear-resisting agent, a bridging agent and a foaming agent, carrying out densification at the temperature of 115-125 ℃ for 15-25min, carrying out densification, granulation, vibration heat dissipation and storage to obtain the high-resilience modified EVA material.
In one embodiment, the temperature of the granulation in step two is 110 ℃.
The invention also provides a manufacturing method of the high-resilience EVA sole, which comprises the following steps: and (3) carrying out small foaming on the high-resilience modified EVA material to prepare a semi-finished product sole, then carrying out foaming molding on the semi-finished product sole by using a mold, and cooling to obtain the high-resilience EVA sole.
In one embodiment, the temperature during the small foaming is 188-190 ℃, and the foaming time is 440-460 s; the temperature of the mould during foaming molding is 160-180 ℃, and the foaming time is 695 and 705 s; the cooling time was 600 s. The small foaming is carried out in a mould, the weight of the raw materials needs to be accurately controlled, so that the ideal foaming multiplying power can be ensured, and the appearance and the quality of the shoe material can be ensured by controlling the foaming time and the temperature within the range.
The invention will be further illustrated by the following examples.
Example 1
The high resilience modified EVA material provided by this embodiment includes according to: 52kg of EVA, 15kg of rubber-plastic elastomer, 3kg of talcum powder, 2kg of wear-resisting agent, 0.5kg of stearic acid, 1.2kg of zinc oxide, 1.35kg of bridging agent and 1.2kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 1kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.35kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature of small foaming is 189 ℃, the foaming time is 450s, the temperature of a mould during foaming molding is 170 ℃, and the foaming time is 700 s.
Example 2
The high resilience modified EVA material provided by this embodiment includes according to: 49.6kg of EVA, 13.7kg of rubber-plastic elastomer, 2.29kg of talcum powder, 1.53kg of wear-resisting agent, 0.38kg of stearic acid, 1.14kg of zinc oxide, 1.07kg of bridging agent and 0.76kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 0.76kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.31kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature of small foaming is 188 ℃, the foaming time is 460s, the temperature of mould foaming is 160 ℃, and the foaming time is 705 s.
Example 3
The high resilience modified EVA material provided by this embodiment includes according to: 50.3kg of EVA, 14.5kg of rubber-plastic elastomer, 2.67kg of talcum powder, 1.68kg of wear-resisting agent, 0.43kg of stearic acid, 1.16kg of zinc oxide, 1.24kg of bridging agent and 1.2kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 0.91kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.33kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature of small foaming is 190 ℃, the foaming time is 440s, the temperature of a mould during foaming molding is 180 ℃, and the foaming time is 695 s.
Example 4
The high resilience modified EVA material provided by this embodiment includes according to: 51.1kg of EVA, 15.3kg of rubber-plastic elastomer, 3.05kg of talcum powder, 1.9kg of wear-resisting agent, 0.46kg of stearic acid, 1.18kg of zinc oxide, 1.33kg of bridging agent and 1.07kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 0.99kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.34kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature of small foaming is 190 ℃, the foaming time is 450s, the temperature of a mould during foaming molding is 170 ℃, and the foaming time is 700 s.
Example 5
The high resilience modified EVA material provided by this embodiment includes according to: 52.6kg of EVA, 15.6kg of rubber-plastic elastomer, 3.43kg of talcum powder, 2.14kg of wear-resisting agent, 0.52kg of stearic acid, 1.21kg of zinc oxide, 1.46kg of bridging agent and 1.37kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 1.1kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.36kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature of small foaming is 189 ℃, the foaming time is 450s, the temperature of a mould during foaming molding is 170 ℃, and the foaming time is 695 s.
Example 6
The high resilience modified EVA material provided by this embodiment includes according to: 53.4kg of EVA, 16kg of rubber-plastic elastomer, 3.66kg of talcum powder, 2.29kg of wear-resisting agent, 0.53kg of stearic acid, 1.22kg of zinc oxide, 1.52kg of bridging agent and 1.53kg of foaming agent, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 1.14kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.38kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature for small foaming is 188 ℃, the foaming time is 460s, the temperature for mould foaming is 170 ℃, and the foaming time is 695 s.
Example 7
The high resilience modified EVA material provided by this embodiment includes according to: 51kg of EVA, 16kg of rubber-plastic elastomer, 4kg of talcum powder, 1.8kg of wear-resisting agent, 0.43kg of stearic acid, 1.26kg of zinc oxide, 1.1kg of bridging agent, 1.1kg of foaming agent and 0.38kg of nano aluminum hydroxide, wherein the rubber-plastic elastomer is SEBS elastomer. The bridging agent is formed by mixing 0.8kg of 1, 3, 5-triallyl-s-triazine-2, 4, 6-Trione (TAIC) and 0.3kg of dicumyl peroxide (DCP). The foaming agent is AC-3000H foaming agent, the compacting temperature is 120 ℃, and the time is 20 min. In the preparation process, the granulation temperature is 110 ℃.
When the sole is made of the materials, the temperature for small foaming is 188 ℃, the foaming time is 440s, the temperature for mould foaming is 160 ℃, and the foaming time is 695 s.
The sole prepared in the above example has a half sole thickness of 13mm and a heel thickness of 25 mm.
The tests below prove that the performance of the high-resilience EVA sole prepared by the invention, and the performance test data below the rebound rate, the tensile strength and the wear resistance of the shoe material are obtained according to the standard test method.
Wherein, the tensile property is tested by manufacturing the shoe material into a sheet with the thickness of about 1mm according to the standard GB/T1040.3-2006.
During the wear resistance test, test pieces with the diameters of 16 +/-0.2 mm and the thicknesses of 8mm are respectively drilled from the half sole area and the heel area of the sole, the upper surface and the lower surface of each test piece are required to be parallel, the side surfaces of each test piece are perpendicular to the upper surface and the lower surface, and the test data are averaged.
TABLE 1 Properties of high resilience EVA soles made according to examples of the invention
As can be seen from table 1, the soles prepared in examples 1 to 7 all have high rebound resilience, high tensile strength and high wear resistance, and after the flame retardant nano aluminum hydroxide is added in example 7, the performance of the soles is not significantly affected, so that the nano aluminum hydroxide has high compatibility with other raw materials.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of protection is not limited thereto. The equivalents and modifications of the present invention which may occur to those skilled in the art are within the scope of the present invention as defined by the appended claims.
Claims (9)
1. The high-resilience modified EVA material is characterized by comprising the following raw materials in percentage by mass: 65-70% of EVA, 18-21% of rubber-plastic elastomer, 3-4.8% of talcum powder, 2-3% of wear-resisting agent, 0.5-0.7% of stearic acid, 1.5-1.6% of zinc oxide, 1.4-2.0% of bridging agent and 1-2% of foaming agent.
2. The high-resilience modified EVA material of claim 1, wherein the rubber-plastic elastomer is an SEBS elastomer.
3. The high resilience modified EVA material of claim 1, characterised in that the bridging agent is a mixture of 1, 3, 5-triallyl-s-triazine-2, 4, 6-trione and dicumyl peroxide.
4. The high resilience modified EVA material of claim 1, further comprising 0.5-1% of nano aluminum hydroxide.
5. The high resilience modified EVA material of claim 1, characterised in that the blowing agent is an AC blowing agent.
6. The method for preparing the high-resilience modified EVA material of claim 1, comprising the following steps:
step one, preparing materials: preparing the raw materials according to the mass ratio;
step two, carrying out densification: uniformly mixing EVA, rubber-plastic elastomer, talcum powder, stearic acid and zinc oxide, sequentially adding a wear-resisting agent, a bridging agent and a foaming agent, carrying out densification at the temperature of 115-125 ℃ for 15-25min, carrying out densification, granulation, vibration heat dissipation and storage to obtain the high-resilience modified EVA material.
7. The method for preparing a high-resilience modified EVA material according to claim 6, wherein the temperature for granulating in the second step is 110 ℃.
8. The manufacturing method of the high-resilience EVA sole is characterized by comprising the following steps: and (3) carrying out small foaming on the high-resilience modified EVA material to prepare a semi-finished product sole, then carrying out foaming molding on the semi-finished product sole by using a mold, and cooling to obtain the high-resilience EVA sole.
9. The method for manufacturing the high-resilience EVA sole according to claim 8, wherein the temperature during the small foaming is 188-190 ℃, and the foaming time is 440-460 s; the temperature of the mould during foaming molding is 160-180 ℃, and the foaming time is 695 and 705 s; the cooling time was 600 s.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113121910A (en) * | 2021-04-30 | 2021-07-16 | 康群伟 | Wear-resistant sole material and preparation method thereof |
| CN114835973A (en) * | 2022-05-31 | 2022-08-02 | 泉州市本源康健鞋材科技有限公司 | EVA (ethylene-vinyl acetate copolymer) composite foam material prepared based on EVA waste and preparation process thereof |
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Application publication date: 20200228 |