CN110818990A - Preparation method of light slow-running shoe sole - Google Patents
Preparation method of light slow-running shoe sole Download PDFInfo
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- CN110818990A CN110818990A CN201911030552.6A CN201911030552A CN110818990A CN 110818990 A CN110818990 A CN 110818990A CN 201911030552 A CN201911030552 A CN 201911030552A CN 110818990 A CN110818990 A CN 110818990A
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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
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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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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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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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- 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
- C08J2423/08—Copolymers of ethene
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2451/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers
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Abstract
The invention discloses a preparation method of a light jogging shoe sole, which is prepared from the following raw materials in parts by weight: 58-65 parts of recovered EVA film, 20-25 parts of EVA, 7-9 parts of graphene oxide, 5-8 parts of maleic anhydridized polybutadiene, 1.7-1.9 parts of foaming agent AC, 0.8-0.9 part of cross-linking agent BIBP, 1.0-1.3 parts of zinc stearate and 1.0-1.2 parts of stearic acid, and carrying out banburying, open milling, granulation and one-time injection molding to obtain the sole of the light jogging shoe. The light jogging shoe sole prepared by the invention has the advantages of light weight, comfort, low cost and the like, and realizes the high-value resource recycling of the EVA shoe sole stub bars, defective products, waste products and leftover materials.
Description
Technical Field
The invention relates to the technical field of organic high molecular compounds, in particular to a method for manufacturing soles of light jogging shoes.
Background
In life, because of the characteristics of light weight, high elasticity, low cost and the like, EVA has an important position in the shoe material industry. Foaming agents and peroxide crosslinking agents such as dicumyl peroxide (DCP) are added into the formula of the EVA foaming shoe material, and the heating forming process is the chemical crosslinking process among the EVA materials. The EVA sole has large molecular polymerization degree and strong intermolecular force, and a high molecular chain is difficult to break and decompose, so that shoe products prepared from the EVA foaming shoe material in the prior art are difficult to degrade after being discarded, serious pollution is brought to the environment due to long-term accumulation, and the brought pollution problem seriously influences the living environment of human beings.
The preparation method of the existing light EVA sole comprises two preparation methods, wherein ① comprises the steps of mixing and banburying EVA7350, a light silica filler, POE8003 colloidal particles, industrial light powder, a foaming agent, a coupling agent, zinc oxide powder and stearic acid in an internal mixer in parts by weight, controlling the temperature of the internal mixer to be 90-100 ℃, controlling the air pressure to be 0.7-0.8kg and carrying out banburying for 5-9 minutes, carrying out milling at ②, sending the material processed in the step ① into an open mill for milling at 75-85 ℃, 15mm2 times and 1mm2 times, carrying out granulation at ③, granulating the material obtained after the processing, cooling at 75-80 ℃, cooling at ④ for 6 hours after the granulation is finished, foaming at ⑤, foaming the material at 170 ℃, foaming at 160-.
The second one is prepared by adopting the following components: the prepared graphene regenerated EVA foamed sole has the advantages of high tensile strength and tearing strength, good bending resistance, high rebound rate, good rebound resilience, small size shrinkage and the like.
However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
1. the sole prepared by the method 1 does not use recycled EVA, and the recycling of EVA leftover materials cannot be realized.
2. Although the sole prepared by the method 2 uses the ethylene-vinyl acetate copolymer leftover powder, the sole is powdery, so that the dust is large, the environmental pollution is easily caused, and meanwhile, the wear resistance and the resilience of the sole are general, and the high-value resource recycling is not realized.
Disclosure of Invention
The embodiment of the application provides a method for manufacturing the sole of a light jogging shoe, solves the problems of environmental pollution caused by the recovery of EVA leftover materials and poor performance of the prepared sole in the prior art, and realizes the recycling of resources of the EVA leftover materials.
The embodiment of the application provides a preparation method of a sole of a portable jogging shoe, which comprises the following steps:
(a) preparing a recycled EVA film, and crushing a stub bar, a defective product, a waste product and a leftover material generated in the production process of an EVA sole by a crusher; then 75 parts of the crushed material, 2 parts of mineral oil and 4 parts of EVA 7870S are banburied in an internal mixer, then are milled, and finally are rolled into a recycled EVA film with the thickness of 0.01mm to 0.05 mm;
(b) the portable jogging shoe sole material rice is prepared from the following raw materials in parts by weight:
firstly, mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, banburying, adjusting the banburying temperature to 90-95 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is raised to 99 ℃, turning materials for the second time; when the banburying temperature is raised to 105 ℃, turning for the third time, and adding a crosslinking agent BIBP and a foaming agent AC; when the banburying temperature is raised to 110 ℃, turning materials for the fourth time; when the banburying temperature rises to 115 ℃, turning over materials for the fifth time, banburying for 1 minute, and finally pouring, opening and granulating to obtain the portable jogging shoe sole material rice;
(c) adding the material rice of the light jogging shoe sole into a charging basket of an EVA injection machine, automatically sucking the material, and performing one-time injection molding at the injection gun temperature of 88-105 ℃, the mold temperature of 175-180 ℃ and the time of 130-170 seconds to obtain the light jogging shoe sole.
Further, the sole material rice for the light jogging shoes in the step (b) comprises the following components in parts by weight:
further, the thickness of the recovered EVA film in the step (a) is in the range of 0.01mm to 0.02 mm.
Further, the method for producing the silicon-boron elastomer in the step (b) comprises: hydroxyl silicone oil with the viscosity ranging from 500cs to 5000cs, white carbon black and boric acid are put into a reactor, the reaction temperature is 160 ℃ to 170 ℃, and the silicon-boron elastomer is obtained after dehydration and stirring treatment for 2 hours.
Further, the graphene oxide in the step (b) is a single-layer graphene oxide powder, the purity is not less than 95% (mass ratio), and the thickness is less than 2 nm.
Further, in the step (b), the maleic anhydride graft ratio of the maleinated polybutadiene is 10 to 20% and the vinyl content is 25 to 35%.
Further, the temperature of the first section to the fourth section of the gun in the step (c) is 92 ℃, 94 ℃, 96 ℃ and 98 ℃, the temperature of the mould is preferably 176 ℃ to 178 ℃, and the time is 10 seconds to 170 seconds.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the recycled EVA film is adopted, so that the problem of environmental pollution caused by the use of ethylene-vinyl acetate copolymer leftover material grinding powder in the prior art is effectively solved, the purpose that leftover materials, defective products, waste products and leftover materials generated in the production process of EVA shoe soles are crushed, banburying and rolled by a crusher to obtain the recycled EVA film is further realized, solid insoluble substances such as sand, metal, glass and the like can be well removed, the problems of large dust, easy material death and easy ignition of the EVA leftover material grinding powder are avoided, the high-value recycling of the EVA leftover materials and the secondary waste products is realized, the waste materials generated in the production process of the EVA shoe soles are effectively reduced, the development direction of the current materials is met, and the global sustainable development is promoted.
2. The invention adds the silicon boron elastomer with excellent performance, the storage modulus and the damping factor of the silicon boron elastomer are greatly changed along with the strain rate of the material under stress, so that the foamed material stores energy due to deformation and can be quickly released when being stressed, the rebound performance of the blended material is good, and the rebound rate is high.
2, owing to adopted graphite oxide, solved among the prior art problem that the dimension of expanded material shrinks greatly, graphite oxide forms three-dimensional net skeleton in the material, has realized the high dimensional stability of sole production process and storage process to can improve expanded material's tear strength and resilience performance.
Detailed Description
In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to specific embodiments of the specification.
The invention will now be further illustrated with reference to specific examples.
The following are a summary of the raw material compositions of the examples and comparative examples, resulting in table 1:
TABLE 1 summary of the raw material compositions of the examples and comparative examples
Example 1:
in this embodiment, the jogging shoe sole comprises the steps of:
in order to achieve the purpose, the invention adopts the following technical scheme that the method comprises the following steps:
step 1: preparing a recycled EVA film, and crushing a stub bar, a defective product, a waste product and a leftover material generated in the production process of an EVA sole by a crusher; then 75 parts of the crushed material, 2 parts of mineral oil and 4 parts of EVA 7870S are banburied in an internal mixer, then are milled, and finally are rolled into a recycled EVA film with the thickness of 0.02 mm;
step 2: the portable jogging shoe sole material rice is prepared from the following raw materials in parts by weight:
the preparation method of the silicon-boron elastomer comprises the following steps: 140g of hydroxyl silicone oil with the viscosity range of 1500cs and the specific surface area of 180m2/g-220m2Putting 18g of fumed silica and 10g of boric acid in a reactor at the reaction temperature of 165 ℃, and carrying out dehydration stirring treatment for 2 hoursThen, the silicon boron elastomer is obtained.
Firstly, mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, banburying, adjusting the banburying temperature to 90-95 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is raised to 99 ℃, turning materials for the second time; when the banburying temperature is raised to 105 ℃, turning for the third time, and adding a crosslinking agent BIBP and a foaming agent AC; when the banburying temperature is raised to 110 ℃, turning materials for the fourth time; when the banburying temperature rises to 115 ℃, turning over materials for the fifth time, banburying for 1 minute, and finally pouring, opening and granulating to obtain the portable jogging shoe sole material rice;
and step 3: the material rice of the light jogging shoe sole is added into a material barrel of an EVA injection machine table, the material is automatically absorbed, and the light jogging shoe sole is obtained through one-time injection molding, wherein the temperatures of a first section and a fourth section of an injection gun are respectively 92 ℃, 94 ℃, 96 ℃, 98 ℃, the temperature of a mold is 178 ℃ and the time is 170 seconds.
The obtained sole of the jogging shoe has a density of 0.21g/cm3Hardness of 60C, tear strength of 7.9N/mm, rebound resilience of 54 percent and dimensional shrinkage of 0.8 percent.
Example 2:
in this example, the preparation of the sole of the walkie shoe is substantially the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
In step 3: the mold temperature was 180 ℃ for 140 seconds.
The obtained sole of the jogging shoe has a density of 0.22g/cm3Hardness 63C, tear strength 7.4N/mm, rebound resilience 56%, dimensional shrinkage 1.0%.
Example 3:
in this example, the preparation of the sole of the walkie shoe is substantially the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The obtained sole of the jogging shoe has a density of 0.21g/cm3Hardness of 61C, tear strength of 7.8N/mm, rebound resilience of 52% and dimensional shrinkage of 0.9%.
Example 4:
in this example, the preparation of the sole of the walkie shoe is substantially the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The obtained sole of the jogging shoe has a density of 0.20g/cm3Hardness 59C, tear strength 8.4N/mm, rebound resilience 51%, dimensional shrinkage 0.5%.
Comparative example a:
in this comparative example, the preparation of the sole of a walkie shoe was the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The obtained sole of the jogging shoe has a density of 0.21g/cm3Hardness 64C, tear strength 4.3N/mm, rebound resilience 41% and dimensional shrinkage 0.9%.
Comparative example B:
in this comparative example, the preparation of the sole of a walkie shoe was the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The obtained sole of the jogging shoe has a density of 0.22g/cm3Hardness 66C, tear strength 8.1N/mm, rebound resilience 43%, dimensional shrinkage 0.6%.
Comparative example C:
in this comparative example, the preparation of the sole of a walkie shoe was the same as in example 1, except that:
in step 2: the raw materials varied in composition (see table 1 for details).
The obtained sole of the jogging shoe has a density of 0.20g/cm3Hardness of 62C, tear strength of 6.2N/mm, rebound resilience of 48 percent and dimensional shrinkage of 2.3 percent.
After the data of examples 1 to 4 and comparative examples A/B/C are collated, the following Table 2 is obtained (Note: hardness is measured by GS-701N durometer, tear strength is measured according to ASTM D624, spring rate is measured by GT-7042-RE type impact elasticity tester, and dimensional shrinkage is measured according to ISO 20873):
table 2: comparison of the Performance parameters of the soles of the walkers prepared in examples 1 to 4 and comparative examples A/B/C.
Example 1 compared with comparative example A, the EVA reclaimed powder used in comparative example A is 40 mesh, the hardness of comparative example A is higher, and the tear strength and resilience performance are obviously poorer; compared with the comparative example B, the comparative example B is not added with the silicon-boron elastomer, the hardness of the comparative example B is higher by 6 degrees, the rebound resilience is worse, and the rebound resilience is reduced by 11 percent; compared with comparative example C, the tear strength, resilience and dimensional shrinkage of comparative example C are obviously poorer without adding graphene oxide. .
In conclusion, the light jogging shoe sole prepared according to the invention has the advantages of light weight, comfort, low cost and the like, realizes the high-value resource recycling of EVA shoe sole stub bars, defective products, waste products and leftover materials, can relieve the environmental problem caused by white pollution, is particularly suitable for application in the aspects of foaming ground mats, various shoe accessories, shoe sole materials and the like, has good comfort and is suitable for industrial production.
The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.
Claims (7)
1. A preparation method of a sole of a light slow-running shoe is characterized by comprising the following steps:
(a) preparing a recycled EVA film, and crushing a stub bar, a defective product, a waste product and a leftover material generated in the production process of an EVA sole by a crusher; then 75 parts of the crushed material, 2 parts of mineral oil and 4 parts of EVA 7870S are banburied in an internal mixer, then are milled, and finally are rolled into a recycled EVA film with the thickness of 0.01mm to 0.05 mm;
(b) the portable jogging shoe sole material rice is prepared from the following raw materials in parts by weight:
firstly, mixing other raw materials except the crosslinking agent BIBP and the foaming agent AC, banburying, adjusting the banburying temperature to 90-95 ℃, keeping for 4 minutes and then stirring; when the banburying temperature is raised to 99 ℃, turning materials for the second time; when the banburying temperature is raised to 105 ℃, turning for the third time, and adding a crosslinking agent BIBP and a foaming agent AC; when the banburying temperature is raised to 110 ℃, turning materials for the fourth time; when the banburying temperature rises to 115 ℃, turning over materials for the fifth time, banburying for 1 minute, and finally pouring, opening and granulating to obtain the portable jogging shoe sole material rice;
(c) adding the material rice of the light jogging shoe sole into a charging basket of an EVA injection machine, automatically sucking the material, and performing one-time injection molding at the injection gun temperature of 88-105 ℃, the mold temperature of 175-180 ℃ and the time of 130-170 seconds to obtain the light jogging shoe sole.
2. The method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: the sole material rice for the light jogging shoes in the working procedure (b) comprises the following components in parts by weight:
3. the method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: the thickness of the recovered EVA film in the step (a) is in the range of 0.01mm to 0.02 mm.
4. The method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: the method for producing the silicon-boron elastomer in the step (b) comprises: hydroxyl silicone oil with the viscosity ranging from 500cs to 5000cs, white carbon black and boric acid are put into a reactor, the reaction temperature is 160 ℃ to 170 ℃, and the silicon-boron elastomer is obtained after dehydration and stirring treatment for 2 hours.
5. The method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: the graphene oxide in the step (b) is single-layer graphene oxide powder, the purity is not lower than 95% (mass ratio), and the thickness is lower than 2 nm.
6. The method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: in the step (b), the maleic anhydride graft ratio of the maleinated polybutadiene is 10 to 20% and the vinyl content is 25 to 35%.
7. The method of making a lightweight jogging shoe sole as claimed in claim 1, wherein: in the step (c), the temperatures of the first section and the fourth section of the gun are respectively 92 ℃, 94 ℃, 96 ℃ and 98 ℃, the temperature of the mould is preferably 176-178 ℃, and the time is 10-170 seconds.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112157861A (en) * | 2020-08-27 | 2021-01-01 | 茂泰(福建)鞋材有限公司 | Preparation method of secondary mould pressing foaming sole |
| CN112172219A (en) * | 2020-08-27 | 2021-01-05 | 茂泰(福建)鞋材有限公司 | Preparation method of double-hardness die-pressed foamed sole |
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| CN112157861A (en) * | 2020-08-27 | 2021-01-01 | 茂泰(福建)鞋材有限公司 | Preparation method of secondary mould pressing foaming sole |
| CN112172219A (en) * | 2020-08-27 | 2021-01-05 | 茂泰(福建)鞋材有限公司 | Preparation method of double-hardness die-pressed foamed sole |
| CN112157861B (en) * | 2020-08-27 | 2022-11-08 | 茂泰(福建)鞋材有限公司 | Preparation method of secondary mould pressing foaming sole |
| CN112172219B (en) * | 2020-08-27 | 2023-08-04 | 茂泰(福建)鞋材有限公司 | Preparation method of double-hardness molded foaming sole |
| CN113024876A (en) * | 2021-05-08 | 2021-06-25 | 福建金宏昌体育用品有限公司 | High-hardness EVA (ethylene-vinyl acetate) foam material for garden shoes and preparation process thereof |
| CN113844077A (en) * | 2021-07-28 | 2021-12-28 | 福建智铭鞋业有限公司 | Method for preparing shoe material by using waste EVA |
| CN114369302A (en) * | 2021-12-31 | 2022-04-19 | 易宝（福建）高分子材料股份公司 | EVA recycled material closed-cell foam material and preparation method thereof |
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