CN114933760A - EVA (ethylene-vinyl acetate copolymer) foamed sole, wear-resistant and anti-skid composition for EVA foamed sole and preparation method of composition - Google Patents
EVA (ethylene-vinyl acetate copolymer) foamed sole, wear-resistant and anti-skid composition for EVA foamed sole and preparation method of composition Download PDFInfo
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- 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
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- 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
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
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- 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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- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
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- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—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
- C08J2423/04—Homopolymers or copolymers of ethene
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- C08K5/34—Heterocyclic compounds having nitrogen in the ring
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- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
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Abstract
An EVA foaming sole, a wear-resistant and anti-skid composition for the EVA foaming sole and a preparation method thereof are provided, the wear-resistant and anti-skid composition for the EVA foaming sole comprises the following raw materials: EVA, butadiene rubber, hydrogenated nitrile rubber, carbon five petroleum resin, a foaming agent, a cross-linking agent, an accelerant, glass fiber, hard pottery clay, montmorillonite powder, zinc stearate, polyethylene glycol and an anti-aging agent.
Description
Technical Field
The invention belongs to the field of preparation of foamed soles, and particularly relates to an EVA foamed sole, a wear-resistant and anti-slip composition for the EVA foamed sole and a preparation method of the wear-resistant and anti-slip composition.
Background
The EVA sole is made of ethylene/vinyl acetate copolymer (also called ethylene-vinyl acetate copolymer) which is prepared by copolymerizing ethylene (E) and Vinyl Acetate (VA), the content of the ethylene/vinyl acetate copolymer is 5-40%, compared with polyethylene, EVA reduces high crystallinity, improves flexibility, impact resistance, filler compatibility and heat sealing performance due to the introduction of vinyl acetate monomer in a molecular chain, and is widely applied to the fields of foaming shoe materials, functional greenhouse films, packaging films, hot melt adhesives, wires and cables, toys and the like.
EVA is a common midsole material, generally called primary foam, and has a certain cushioning effect, but the material is slippery and is generally mixed with hard rubber. The EVA sole has the characteristics of good softness, rubber-like elasticity, good flexibility at a temperature below 0 ℃, good transparency and surface gloss, good chemical stability, good aging resistance and ozone resistance, and no toxicity; the mixing property with the filler is good, and the coloring and forming processability is good; however, the rubber and plastic foaming has the problems of large density, poor dimensional stability and the like; there is a need for further improvement.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a wear-resistant anti-slip composition for EVA foamed shoe soles and a preparation method thereof, and also aims to provide EVA foamed shoe soles prepared by the wear-resistant anti-slip composition.
The invention adopts the following technical scheme:
a wear-resistant and anti-slip composition for EVA foamed shoe soles comprises the following raw materials in parts by weight:
further, the accelerator is prepared from triethylene diamine, N-dimethyl cyclohexylamine and dibutyltin dilaurate according to the mass ratio of 1: 0.32-0.45: 0.15-0.27.
Further, the cross-linking agent is a cross-linking agent BIBP.
Further, the anti-aging agent is an anti-aging agent RD.
Further, the hardness is highThe specific surface of the argil is 22-26m 2 /g。
Further, the foaming agent is a foaming agent AC.
A preparation method of a wear-resistant and anti-slip composition for EVA foamed shoe soles comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required weight parts into an internal mixer for internal mixing for 10-15min to obtain a premix;
step two, mixing and banburying the premix prepared in the step one and other raw materials except the foaming agent, the cross-linking agent and the accelerant, discharging rubber at the temperature of 115 ℃ and 120 ℃, and standing for more than 24 hours at room temperature;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing the materials, and then, sheet-shaped forming to obtain the foamed sheet.
Further, in the second step, the banburying process specifically includes: adding the premix prepared in the step one and other raw materials except the foaming agent, the cross-linking agent and the accelerator into an internal mixer, and mixing and banburying for 5-10 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; when the banburying temperature is raised to 98 ℃, performing secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; and (4) after the banburying temperature is raised to 115-120 ℃, performing five times of material turning, banburying for 1min, discharging the rubber, and standing at room temperature for more than 24 h.
An EVA foamed sole is formed by foaming the wear-resistant and anti-skid composition.
A preparation method of EVA foamed sole comprises cutting a foamed sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foamed sole, wherein the foaming temperature is 150-.
As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are:
firstly, EVA, butadiene rubber and hydrogenated nitrile rubber are limited to be mixed mutually, and carbon five petroleum resin is added to increase compatibility and adhesion among raw materials so as to improve the skid resistance and wear resistance of the prepared foamed sole; the anti-skid performance of the foamed sole is improved by adding the butadiene rubber and the hydrogenated nitrile rubber and matching with the EVA, but the shrinkage rate of the sole during molding can be influenced by adding the rubber, so that the shrinkage rate of the foamed sole during molding is greatly reduced by adding the hard pottery clay and the montmorillonite powder and matching the butadiene rubber and the hydrogenated nitrile rubber, and the anti-skid performance of the foamed sole is ensured and the dimensional stability of the sole is also ensured; introducing glass fiber to be compounded with EVA, butadiene rubber and hydrogenated nitrile rubber so as to improve the wear resistance of the prepared foamed sole;
secondly, the specific composition of the accelerator is limited, and the accelerator is matched with the foaming agent AC, so that the vulcanization speed of the composition is approximately synchronous with the foaming speed, a closed cell structure with small and uniform pores is obtained, the formed closed cell structures are in mutually independent states, and the bubbles are not communicated, so that the prepared foamed sole has better anti-skid performance and wear resistance; meanwhile, the foamed butadiene rubber and the hydrogenated nitrile rubber have excellent wear resistance and elasticity, so that the overall mechanical property of the prepared foamed sole is ensured.
Detailed Description
The invention is further described below by means of specific embodiments.
An EVA foamed sole is foamed by adopting a wear-resistant anti-slip composition; specifically, the preparation method comprises the following steps: cutting the foaming sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foaming sole, wherein the foaming temperature is 150-160 ℃.
A wear-resistant and anti-skid composition for EVA foamed shoe soles comprises the following raw materials in parts by weight:
wherein the accelerator is prepared from triethylene diamine, N-dimethyl cyclohexylamine and dibutyltin dilaurate according to the mass ratio of 1: 0.32-0.45: 0.15-0.27.
The specific surface area of the hard pottery clay is 22-26m 2 /g。
The preparation method comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required weight parts into an internal mixer for internal mixing for 10-15min to obtain a premix;
step two, adding the premix prepared in the step one and other raw materials except the foaming agent, the crosslinking agent and the accelerator into an internal mixer, and mixing and banburying for 5-10 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; after the banburying temperature is raised to 98 ℃, carrying out secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; after the banburying temperature is raised to 115-120 ℃, the materials are turned for five times, then the banburying is carried out for 1min, the rubber is discharged, and the mixture is placed at room temperature for more than 24 h;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing, and discharging the mixture in a sheet shape to obtain the foamed sheet.
Example 1
An EVA foamed sole is foamed by adopting a wear-resistant anti-slip composition; specifically, the preparation method comprises the following steps: cutting the foaming sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foaming sole, wherein the foaming temperature is 150 ℃.
A wear-resistant and anti-slip composition for EVA foamed shoe soles comprises the following raw materials in parts by weight:
the accelerator is prepared from triethylene diamine, N-dimethyl cyclohexylamine and dibutyltin dilaurate according to a mass ratio of 1: 0.32: a ratio of 0.27.
The specific surface of the hard pottery clay is 22-26m 2 /g。
The preparation method comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required weight parts into an internal mixer for internal mixing for 10min to obtain a premix;
step two, adding the premix prepared in the step one and other raw materials except the foaming agent, the cross-linking agent and the accelerant into an internal mixer, and mixing and internally mixing for 5 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; when the banburying temperature is raised to 98 ℃, performing secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; after the banburying temperature is raised to 115 ℃, the materials are turned for five times, banburying is carried out for 1min, the rubber is discharged, and the mixture is placed at room temperature for more than 24 h;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing the materials, and then, sheet-shaped forming to obtain the foamed sheet.
Example 2
An EVA foamed sole is foamed by adopting a wear-resistant anti-slip composition; specifically, the preparation method comprises the following steps: cutting the foaming sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foaming sole, wherein the foaming temperature is 160 ℃.
A wear-resistant and anti-skid composition for EVA foamed shoe soles comprises the following raw materials in parts by weight:
the accelerator is prepared from triethylene diamine, N-dimethyl cyclohexylamine and dibutyltin dilaurate according to a mass ratio of 1: 0.45: 0.15 in proportion.
The specific surface area of the hard pottery clay is 22-26m 2 /g。
The preparation method comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required parts by weight into an internal mixer for internal mixing for 15min to obtain a premix;
step two, adding the premix prepared in the step one and other raw materials except the foaming agent, the crosslinking agent and the accelerator into an internal mixer, and mixing and banburying for 10 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; when the banburying temperature is raised to 98 ℃, performing secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; after the banburying temperature is raised to 120 ℃, the materials are turned over for five times, banburying is carried out for 1min, the rubber is discharged, and the mixture is placed at room temperature for more than 24 h;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing the materials, and then, sheet-shaped forming to obtain the foamed sheet.
Example 3
An EVA foamed sole is foamed by adopting a wear-resistant anti-slip composition; specifically, the preparation method comprises the following steps: cutting the foaming sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foaming sole, wherein the foaming temperature is 155 ℃.
A wear-resistant and anti-slip composition for EVA foamed shoe soles comprises the following raw materials in parts by weight:
wherein the accelerator is prepared from triethylene diamine, N-dimethylcyclohexylamine and dibutyltin dilaurate according to a mass ratio of 1: 0.39: a ratio of 0.21.
The specific surface of the hard pottery clay is 22-26m 2 /g。
The preparation method comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required weight parts into an internal mixer for internal mixing for 12min to obtain a premix;
step two, adding the premix prepared in the step one and other raw materials except the foaming agent, the crosslinking agent and the accelerator into an internal mixer, and mixing and banburying for 8 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; when the banburying temperature is raised to 98 ℃, performing secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; after the banburying temperature is increased to 117 ℃, the materials are turned over for five times, banburying is carried out for 1min, the rubber is discharged, and the mixture is placed at room temperature for more than 24 h;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing the materials, and then, sheet-shaped forming to obtain the foamed sheet.
Comparative example 1
The raw material composition and the preparation method are basically consistent with those of the embodiment 3, and the differences are as follows: in the raw material composition, the carbon five petroleum resin is omitted.
Comparative example 2
The raw material composition and the preparation method are basically consistent with those of the example 3, and the differences are as follows: in the raw material composition, the hard pottery clay and the montmorillonite powder are replaced by talcum powder in equal amount.
Comparative example 3
The raw material composition and the preparation method are basically consistent with those of the example 3, and the differences are as follows: in the raw material composition, the glass fiber is omitted.
Comparative example 4
The raw material composition and the preparation method are basically consistent with those of the example 3, and the differences are as follows: in the raw material composition, the hydrogenated nitrile rubber is replaced by styrene butadiene rubber.
Comparative example 5
The raw material composition and the preparation method are basically consistent with those of the example 3, and the differences are as follows: in the raw material composition, the butadiene rubber is replaced by natural rubber.
The EVA foamed shoe soles prepared in examples 1-3 and comparative examples 1-5 were tested accordingly, and the following data were obtained:
TABLE 1 data table of each example
According to the table, the EVA foamed sole prepared by the method has good anti-skid performance and wear resistance; the compatibility and the adhesion among the raw materials are improved by limiting the mutual mixing of EVA, butadiene rubber and hydrogenated nitrile rubber and adding carbon five petroleum resin, so that the skid resistance and the wear resistance of the prepared foamed sole are improved; the anti-skid performance of the foamed sole is improved by adding the butadiene rubber and the hydrogenated nitrile rubber and matching with the EVA, but the shrinkage rate of the sole during molding can be influenced by adding the rubber, so that the shrinkage rate of the foamed sole during molding is greatly reduced by adding the hard pottery clay and the montmorillonite powder and matching the butadiene rubber and the hydrogenated nitrile rubber, and the anti-skid performance of the foamed sole is ensured and the stability of the size of the sole is also ensured; the glass fiber is introduced to be compounded with EVA, butadiene rubber and hydrogenated nitrile rubber so as to improve the wear resistance of the prepared foamed sole.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, and the equivalent variations and modifications made in the claims and the description of the present invention should be included in the scope of the present invention.
Claims (10)
1. A wear-resistant and anti-slip composition for EVA foamed shoe soles is characterized in that: the feed comprises the following raw materials in parts by weight:
2. the wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 1, characterized in that: the accelerator is prepared from triethylene diamine, N-dimethyl cyclohexylamine and dibutyltin dilaurate according to the mass ratio of 1: 0.32-0.45: 0.15-0.27.
3. The wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 1, characterized in that: the cross-linking agent is a cross-linking agent BIBP.
4. The wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 1, characterized in that: the anti-aging agent is an anti-aging agent RD.
5. The wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 1, characterized in that: the specific surface of the hard argil is 22-26m 2 /g。
6. The wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 1, characterized in that: the foaming agent is foaming agent AC.
7. A preparation method of a wear-resistant and anti-slip composition for EVA foamed soles is characterized by comprising the following steps: the method comprises the following steps:
firstly, placing EVA, butadiene rubber and hydrogenated nitrile rubber in required weight parts into an internal mixer for internal mixing for 10-15min to obtain a premix;
step two, mixing and banburying the premix prepared in the step one and other raw materials except the foaming agent, the cross-linking agent and the accelerant, discharging rubber at the temperature of 115 ℃ and 120 ℃, and standing for more than 24 hours at room temperature;
and step three, mixing the internally mixed mixture on an open mill, adding accurately weighed foaming agent, crosslinking agent and accelerator, uniformly mixing the materials, and then, sheet-shaped forming to obtain the foamed sheet.
8. The preparation method of the wear-resistant and anti-slip composition for EVA foamed shoe soles according to claim 7, characterized in that: in the second step, the banburying process specifically comprises the following steps: adding the premix prepared in the step one and other raw materials except the foaming agent, the crosslinking agent and the accelerator into an internal mixer, and mixing and banburying for 5-10 min; then adjusting the banburying temperature to 93 ℃, and turning for one time after keeping for 3 min; when the banburying temperature is raised to 98 ℃, performing secondary material turning; when the banburying temperature is raised to 106 ℃, turning materials for three times; stirring for four times when the banburying temperature is raised to 110 ℃; and (3) after the banburying temperature is raised to 115-120 ℃, performing five-time material turning, carrying out banburying for 1min, discharging the rubber, and standing at room temperature for more than 24 h.
9. The EVA foaming sole is characterized in that: foamed with the wear-resistant and non-slip composition of any one of claims 1 to 8.
10. The preparation method of the EVA foaming shoe sole according to claim 9, characterized in that: cutting the foaming sheet into a sole shape, placing the sole shape into a shoe mold, and foaming and molding to obtain the EVA foaming sole, wherein the foaming temperature is 150-.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210461256.7A CN114933760A (en) | 2022-04-28 | 2022-04-28 | EVA (ethylene-vinyl acetate copolymer) foamed sole, wear-resistant and anti-skid composition for EVA foamed sole and preparation method of composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210461256.7A CN114933760A (en) | 2022-04-28 | 2022-04-28 | EVA (ethylene-vinyl acetate copolymer) foamed sole, wear-resistant and anti-skid composition for EVA foamed sole and preparation method of composition |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277316A (en) * | 2014-08-07 | 2015-01-14 | 茂泰(福建)鞋材有限公司 | Antiskid EVA sole and preparation method thereof |
| CN110358182A (en) * | 2019-07-18 | 2019-10-22 | 福建鸿星尔克体育用品有限公司 | A kind of long-distance running shoes sole and preparation method thereof |
| CN111793270A (en) * | 2020-07-30 | 2020-10-20 | 厦门翔矽新材料有限公司 | Anti-slip agent particle for shoe material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104277316A (en) * | 2014-08-07 | 2015-01-14 | 茂泰(福建)鞋材有限公司 | Antiskid EVA sole and preparation method thereof |
| CN110358182A (en) * | 2019-07-18 | 2019-10-22 | 福建鸿星尔克体育用品有限公司 | A kind of long-distance running shoes sole and preparation method thereof |
| CN111793270A (en) * | 2020-07-30 | 2020-10-20 | 厦门翔矽新材料有限公司 | Anti-slip agent particle for shoe material and preparation method thereof |
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