CN111154173A - EVA sole and preparation process thereof - Google Patents
EVA sole and preparation process thereof Download PDFInfo
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- CN111154173A CN111154173A CN202010052782.9A CN202010052782A CN111154173A CN 111154173 A CN111154173 A CN 111154173A CN 202010052782 A CN202010052782 A CN 202010052782A CN 111154173 A CN111154173 A CN 111154173A
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- density polyethylene
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- jute fiber
- low
- eva
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- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- 240000000491 Corchorus aestuans Species 0.000 claims abstract description 126
- 235000011777 Corchorus aestuans Nutrition 0.000 claims abstract description 126
- 235000010862 Corchorus capsularis Nutrition 0.000 claims abstract description 126
- 239000000835 fiber Substances 0.000 claims abstract description 126
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 99
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 99
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 76
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 76
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 76
- 238000003825 pressing Methods 0.000 claims abstract description 44
- 150000001875 compounds Chemical class 0.000 claims abstract description 34
- 239000000945 filler Substances 0.000 claims abstract description 30
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 239000004088 foaming agent Substances 0.000 claims abstract description 26
- 239000004595 color masterbatch Substances 0.000 claims abstract description 22
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 21
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims abstract description 21
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 21
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000008117 stearic acid Substances 0.000 claims abstract description 21
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000009966 trimming Methods 0.000 claims abstract description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003063 flame retardant Substances 0.000 claims abstract description 8
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 52
- 238000002156 mixing Methods 0.000 claims description 51
- 239000000843 powder Substances 0.000 claims description 40
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 38
- 235000007164 Oryza sativa Nutrition 0.000 claims description 28
- 235000009566 rice Nutrition 0.000 claims description 28
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 26
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical group [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 22
- 239000000347 magnesium hydroxide Substances 0.000 claims description 22
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 22
- 239000011787 zinc oxide Substances 0.000 claims description 19
- 238000005520 cutting process Methods 0.000 claims description 18
- 239000000839 emulsion Substances 0.000 claims description 17
- 238000004073 vulcanization Methods 0.000 claims description 13
- 238000013329 compounding Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 9
- 238000001746 injection moulding Methods 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 235000017550 sodium carbonate Nutrition 0.000 claims 1
- 238000003801 milling Methods 0.000 abstract 1
- 241000209094 Oryza Species 0.000 description 27
- 230000000052 comparative effect Effects 0.000 description 25
- 230000000694 effects Effects 0.000 description 13
- 239000001913 cellulose Substances 0.000 description 8
- 229920002678 cellulose Polymers 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 239000004798 oriented polystyrene Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000010903 husk Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- UTPYTEWRMXITIN-YDWXAUTNSA-N 1-methyl-3-[(e)-[(3e)-3-(methylcarbamothioylhydrazinylidene)butan-2-ylidene]amino]thiourea Chemical compound CNC(=S)N\N=C(/C)\C(\C)=N\NC(=S)NC UTPYTEWRMXITIN-YDWXAUTNSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- YISOXLVRWFDIKD-UHFFFAOYSA-N bismuth;borate Chemical compound [Bi+3].[O-]B([O-])[O-] YISOXLVRWFDIKD-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C08J9/0095—Mixtures of at least two compounding ingredients belonging to different one-dot groups
-
- 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
-
- 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
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
- C08J2409/02—Copolymers with acrylonitrile
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- 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
- 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
- C08J2423/06—Polyethene
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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
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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- Engineering & Computer Science (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Emergency Medicine (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The invention relates to an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 50-70 parts of EVA (ethylene vinyl acetate), 20-30 parts of modified low-density polyethylene, 10-20 parts of filler, 10-15 parts of flame retardant, 5-8 parts of color master batch, 2-4 parts of foaming agent, 0.4-0.8 part of bridging agent, 0.2-0.4 part of accelerator, 0.5-0.6 part of stearic acid, 0.3-0.5 part of N, N' -ethylene bis stearamide and 0.1-0.2 part of triallyl isocyanurate; the modified low-density polyethylene is a jute fiber/nitrile rubber/low-density polyethylene compound; the preparation process comprises the following steps: s1, banburying; s2, open milling; s3, cooling; s4, slitting; s5, mould pressing; and S6, trimming. The sole produced by the invention has good crack resistance.
Description
Technical Field
The invention relates to the technical field of shoe product production, in particular to an EVA sole and a preparation process thereof.
Background
The EVA shoe sole is a shoe sole made of EVA material, which is an ethylene/vinyl acetate copolymer and is made by copolymerizing ethylene (E) and Vinyl Acetate (VA). The EVA sole has high rebound resilience and tension resistance, good shockproof and buffering performances, excellent heat preservation, cold protection and low temperature performances, and can resist severe cold, and the EVA material has a closed cellular structure, so that the EVA sole has good moisture resistance. The EVA sole also has good flexibility, good transparency and surface gloss, good chemical stability, good aging resistance and good ozone resistance, and can still have good flexibility at the temperature of below 0 ℃.
Although the existing shoe sole made of the EVA material has the advantages, the crack resistance of the shoe sole is poor, and the shoe sole is easy to crack after a consumer wears the shoe sole for a certain time, so that the quality of the shoe is seriously influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an EVA sole which has good crack resistance.
The second purpose of the invention is to provide a preparation process of the EVA sole based on the first purpose.
The above object of the present invention is achieved by the following technical solutions: an EVA sole comprises the following components in parts by weight: 50-70 parts of EVA (ethylene vinyl acetate), 20-30 parts of modified low-density polyethylene, 10-20 parts of filler, 10-15 parts of flame retardant, 5-8 parts of color master batch, 2-4 parts of foaming agent, 0.4-0.8 part of bridging agent, 0.2-0.4 part of accelerator, 0.5-0.6 part of stearic acid, 0.3-0.5 part of N, N' -ethylene bis stearamide and 0.1-0.2 part of triallyl isocyanurate; the modified low-density polyethylene is a jute fiber/nitrile rubber/low-density polyethylene compound.
By adopting the technical scheme, the jute fiber has good specific strength and bending toughness and good wettability with low-density polyethylene; the low-density polyethylene has good flexibility, extensibility, electrical insulation, transparency, easy processability and certain air permeability; the nitrile rubber has good toughness and wear resistance;
the jute fiber and the nitrile rubber are used for modifying the low-density polyethylene, the jute fiber is mainly beneficial to improving the bending toughness of the low-density polyethylene, the nitrile rubber is used for making up for the defect of poor wear resistance of the low-density polyethylene, and the nitrile rubber, the jute fiber and the nitrile rubber are cooperatively matched to be beneficial to improving the crack resistance of the sole.
The present invention in a preferred example may be further configured to:
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3Drying the jute fiber after the jute fiber is treated by the solution, then placing the jute fiber under an ultraviolet lamp for irradiation for 30-40min, and finally crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: and extruding the blend by a double-screw extruder and then performing injection molding to obtain the jute fiber/nitrile rubber/low density polyethylene.
By adopting the technical scheme, the jute fiber is subjected to alkali treatment to remove impurities in the jute fiber, so that the swelling degree of cellulose in the jute fiber is improved, and the hydrophilicity of the cellulose is reduced; then, ultraviolet lamp irradiation treatment is carried out on the jute fiber, so that the jute fiber is crosslinked, and the tensile property of the jute fiber is improved; and finally, crushing the jute fiber to ensure that the cellulose in the jute fiber fully exerts the modification effect on the low-density polyethylene and improves the interfacial adhesion of the cellulose and the low-density polyethylene.
The present invention in a preferred example may be further configured to: the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is (25-35%): (15% -20%): (45% -60%).
By adopting the technical scheme, the compounding ratio among the jute fiber, the nitrile rubber and the low-density polyethylene needs to be controlled in a proper range, so that the modification effect of the jute fiber and the nitrile rubber on the low-density polyethylene is improved.
The present invention in a preferred example may be further configured to: the filler is prepared from the following components in percentage by mass: (1-2.5) rice hull ash and calcium carbonate powder.
By adopting the technical scheme, the rice hull ash and the calcium carbonate powder are selected as the filler, the rice hull ash contains a large amount of active ingredients, and the active silicon dioxide and the calcium carbonate react rapidly, so that almost no free calcium hydroxide exists in the system, and the strength and the corrosion resistance of the sole are enhanced;
the rice hull ash has a porous structure, and other components are filled in the rice hull ash, so that the bonding effect among the components is improved.
The present invention in a preferred example may be further configured to: the flame retardant is magnesium hydroxide.
By adopting the technical scheme, the magnesium hydroxide has the effects of flame retardance and smoke suppression, the magnesium hydroxide is cheap and easily available in raw materials, and is white powder, so that the magnesium hydroxide is prevented from being added into a system to influence color change of color master batches, and therefore, the magnesium hydroxide is selected as a flame retardant.
The present invention in a preferred example may be further configured to: the foaming agent is an AC foaming agent.
By adopting the technical scheme, the AC foaming agent is added into the raw materials, so that the foaming efficiency in the preparation process of the raw materials is improved, and the toughness and the strength of the ground mat are improved.
The present invention in a preferred example may be further configured to: the bridging agent is BIPB.
By adopting the technical scheme, BIPB is decomposed into radicals with high chemical activity in a heating state, and the radicals capture hydrogen atoms in an EVA molecular structure, so that partial carbon atoms of the main chain of the EVA molecule show activity and are combined with the radicals to generate C-C cross-linked bonds, and a reticular macromolecular structure is formed in the EVA, so that the cross-linking degree among molecules is improved, and various physical and chemical properties of the sole are improved.
The present invention in a preferred example may be further configured to: the accelerant is zinc oxide.
By adopting the technical scheme, the zinc oxide does not participate in the reaction and is used for activating the vulcanization system, so that the reaction process of the vulcanization system is promoted, the cross-linking density among molecules in the vulcanization reaction is improved, and the high efficiency of the vulcanization reaction is ensured.
The second purpose of the invention is realized by the following technical scheme:
a preparation process of an EVA sole specifically comprises the following preparation steps:
s1, banburying, namely adding EVA, modified low-density polyethylene, a filler and a flame retardant into a banbury mixer for mixing, then adding a bridging agent and an accelerator for vulcanization treatment, then adding a foaming agent, stearic acid and N, N' -ethylene bis-stearamide for continuous banburying, and finally adding color master batches for color mixing, wherein the banburying temperature is 160-170 ℃, and the banburying time is 10-20 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40-45 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 170-;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
In summary, the invention includes at least one of the following beneficial technical effects:
1. the jute fiber and the nitrile rubber are used for modifying the low-density polyethylene, the jute fiber is mainly beneficial to improving the bending toughness of the low-density polyethylene, the nitrile rubber is used for making up the defect of poor wear resistance of the low-density polyethylene, and the nitrile rubber, the jute fiber and the nitrile rubber are cooperatively matched to be beneficial to improving the crack resistance of the sole;
2. firstly, alkali treatment is carried out on jute fiber, so that impurities in the jute fiber are removed, the swelling degree of cellulose in the jute fiber is improved, and the hydrophilicity of the cellulose is reduced; then, ultraviolet lamp irradiation treatment is carried out on the jute fiber, so that the jute fiber is crosslinked, and the tensile property of the jute fiber is improved; finally, the jute fiber is crushed, so that the cellulose in the jute fiber can fully exert the modification effect on the low-density polyethylene, and the interface adhesion between the cellulose and the low-density polyethylene is improved;
3. the compounding ratio of the jute fiber, the nitrile rubber and the low-density polyethylene needs to be controlled within a proper range, so that the modification effect of the jute fiber and the nitrile rubber on the low-density polyethylene is improved.
Detailed Description
Embodiment 1 discloses an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of jute fiber/nitrile rubber/low-density polyethylene compound, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (biaxially-oriented polystyrene), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3After the jute fiber is treated by the solution, drying the jute fiber, then placing the jute fiber under an ultraviolet lamp for irradiation for 30min, and finally crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/nitrile rubber/low-density polyethylene;
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 30%: 18%: 52 percent;
the preparation process specifically comprises the following steps:
s1, banburying: mixing EVA, jute fiber/nitrile rubber/low-density polyethylene compound, rice hull ash, calcium carbonate powder and magnesium hydroxide in an internal mixer, adding BIPB and zinc oxide for vulcanization, adding an AC foaming agent, stearic acid and N, N' -ethylene bisstearamide for continuous internal mixing, and adding color master batch for color mixing at 165 ℃ for 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Embodiment 2 discloses an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 50 parts of EVA, 20 parts of jute fiber/nitrile rubber/low-density polyethylene compound, 10 parts of filler, 10 parts of magnesium hydroxide, 5 parts of color master batch, 2 parts of AC foaming agent, 0.4 part of BIPB, 0.2 part of zinc oxide, 0.5 part of stearic acid, 0.3 part of N, N' -ethylene bis stearamide and 0.1 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3After the jute fiber is treated by the solution, drying the jute fiber, then placing the jute fiber under an ultraviolet lamp for irradiation for 30min, and finally crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/nitrile rubber/low-density polyethylene;
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 30%: 18%: 52 percent;
the preparation process specifically comprises the following steps:
s1, banburying: mixing EVA, jute fiber/nitrile rubber/low-density polyethylene compound, rice hull ash, calcium carbonate powder and magnesium hydroxide in an internal mixer, adding BIPB and zinc oxide for vulcanization, adding an AC foaming agent, stearic acid and N, N' -ethylene bisstearamide for continuous internal mixing, and adding color master batch for color mixing at 165 ℃ for 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Embodiment 3 discloses an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 70 parts of EVA (ethylene vinyl acetate), 30 parts of jute fiber/nitrile rubber/low-density polyethylene compound, 20 parts of filler, 15 parts of magnesium hydroxide, 8 parts of color master batch, 4 parts of AC foaming agent, 0.8 part of BIPB (biaxially-oriented polystyrene), 0.4 part of zinc oxide, 0.6 part of stearic acid, 0.5 part of N, N' -ethylene bis-stearamide and 0.2 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3After the jute fiber is treated by the solution, drying the jute fiber, then placing the jute fiber under an ultraviolet lamp for irradiation for 30min, and finally crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/nitrile rubber/low-density polyethylene;
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 30%: 18%: 52 percent;
the preparation process specifically comprises the following steps:
s1, banburying: mixing EVA, jute fiber/nitrile rubber/low-density polyethylene compound, rice hull ash, calcium carbonate powder and magnesium hydroxide in an internal mixer, adding BIPB and zinc oxide for vulcanization, adding an AC foaming agent, stearic acid and N, N' -ethylene bisstearamide for continuous internal mixing, and adding color master batch for color mixing at 165 ℃ for 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Example 4, the difference from example 1 is that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 25%: 15%: 60 percent.
Example 5, the difference from example 1 is that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 35%: 20%: 40 percent.
Example 6, the difference from example 1 is that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 25%: 20%: and 55 percent.
Example 7, the difference from example 1 is that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 35%: 15%: 50 percent.
Example 8, the difference from example 1 is that:
the filler is prepared from the following components in percentage by mass: 1 rice hull ash and calcium carbonate powder.
Example 9, the difference from example 1 is that:
the filler is prepared from the following components in percentage by mass: 2.5 of rice hull ash and calcium carbonate powder.
Comparative example 1, the invention discloses an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of low-density polyethylene, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (bismuth borate), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation process specifically comprises the following steps:
s1, banburying: adding EVA, low-density polyethylene, rice hull ash, calcium carbonate powder and magnesium hydroxide into an internal mixer for mixing, then adding BIPB and zinc oxide for vulcanization treatment, then adding an AC foaming agent, stearic acid and N, N' -ethylene bis stearamide for continuous internal mixing, and finally adding color master batches for color mixing, wherein the internal mixing temperature is 165 ℃ and the internal mixing time is 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Comparative example 2, for the EVA sole and the preparation process thereof disclosed by the invention, the EVA sole comprises the following components in parts by weight: 60 parts of EVA, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB, 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation process specifically comprises the following steps:
s1, banburying: adding EVA, rice hull ash, calcium carbonate powder and magnesium hydroxide into an internal mixer for mixing, then adding BIPB and zinc oxide for vulcanization treatment, then adding an AC foaming agent, stearic acid and N, N' -ethylene bis stearamide for continuous internal mixing, and finally adding color master batches for color mixing, wherein the internal mixing temperature is 165 ℃, and the internal mixing time is 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Comparative example 3, for the EVA sole and the preparation process thereof disclosed by the invention, the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of jute fiber/low-density polyethylene compound, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (biaxially-oriented polystyrene), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis-stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3After the jute fiber is treated by the solution, drying the jute fiber, then placing the jute fiber under an ultraviolet lamp for irradiation for 30min, and finally crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/low density polyethylene; the mass fraction ratio of the jute fiber to the low-density polyethylene is 36.6%: 63.4 percent;
the preparation process specifically comprises the following steps:
s1, banburying: mixing EVA, jute fiber/low-density polyethylene compound, rice hull ash, calcium carbonate powder and magnesium hydroxide in an internal mixer, adding BIPB and zinc oxide for vulcanization, adding an AC foaming agent, stearic acid and N, N' -ethylene bis-stearamide for continuous internal mixing, adding color master batches for color mixing, wherein the internal mixing temperature is 165 ℃ and the internal mixing time is 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Comparative example 4, for the EVA sole and the preparation process thereof disclosed by the present invention, the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of nitrile rubber/low-density polyethylene compound, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (butadiene styrene), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the nitrile rubber/low density polyethylene compound comprises the following steps:
A1. compounding treatment: uniformly blending the nitrile butadiene rubber emulsion and the low-density polyethylene emulsion;
A2. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to obtain nitrile rubber/low-density polyethylene; the mass fraction ratio of the nitrile rubber to the low-density polyethylene is 25.7%: 74.3 percent;
the preparation process specifically comprises the following steps:
s1, banburying: mixing EVA, nitrile rubber/low-density polyethylene compound, rice hull ash, calcium carbonate powder and magnesium hydroxide in an internal mixer, adding BIPB and zinc oxide for vulcanization, adding an AC foaming agent, stearic acid and N, N' -ethylene bis-stearamide for continuous internal mixing, and finally adding color master batches for color mixing, wherein the internal mixing temperature is 165 ℃ and the internal mixing time is 15 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 175 ℃, and the mold pressing time is 20 min;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
Comparative example 5, which differs from example 1 in that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 22%: 12%: 66 percent.
Comparative example 6, which differs from example 1 in that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 37%: 23%: 40 percent.
Comparative example 7, which differs from example 1 in that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 40%: 18%: 42 percent.
Comparative example 8, which differs from example 1 in that:
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 20%: 18%: 62 percent.
Comparative example 9, which differs from example 1 in that:
the filler is prepared from the following components in percentage by mass: 0.8 of rice hull ash and calcium carbonate powder.
Comparative example 10, which differs from example 1 in that:
the filler is prepared from the following components in percentage by mass: 2.7 rice hull ash and calcium carbonate powder.
Comparative example 11, the EVA sole and the preparation process thereof disclosed by the present invention, the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of jute fiber/nitrile rubber/low-density polyethylene compound, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (biaxially-oriented polystyrene), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: irradiating jute fiber under ultraviolet lamp for 30min, and pulverizing jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/nitrile rubber/low-density polyethylene;
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 30%: 18%: 52 percent;
the preparation process is the same as in example 1.
Comparative example 12, the invention discloses an EVA sole and a preparation process thereof, wherein the EVA sole comprises the following components in parts by weight: 60 parts of EVA (ethylene vinyl acetate), 25 parts of jute fiber/nitrile rubber/low-density polyethylene compound, 15 parts of filler, 12 parts of magnesium hydroxide, 6.5 parts of color master batch, 3 parts of AC foaming agent, 0.6 part of BIPB (biaxially-oriented polystyrene), 0.3 part of zinc oxide, 0.55 part of stearic acid, 0.4 part of N, N' -ethylene bis stearamide and 0.15 part of triallyl isocyanurate;
the filler is prepared from the following components in percentage by mass: 1.6 of rice hull ash and calcium carbonate powder;
the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: first use 2% Na2CO3After the jute fiber is treated by the solution, drying the jute fiber, and then crushing the jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: extruding the blend through a double-screw extruder and then performing injection molding to prepare jute fiber/nitrile rubber/low-density polyethylene;
the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is 30%: 18%: 52 percent;
the preparation process is the same as in example 1.
Performance test
The soles prepared from the formulations and processes of examples 1-9 and comparative examples 1-12 were sampled and the samples were subjected to the following performance test tests, the test results of which are reported in table 1.
And (3) toughness detection: the bending modulus is used for representing the toughness of the sample, and the larger the bending modulus value is, the better the crack resistance is shown; detection was performed according to ATSM D-790 standard.
And (3) detecting the tensile property: the tensile property of the sample is characterized by the breaking elongation, and the larger the breaking elongation value is, the better the tensile property of the sample is; testing was performed according to ASTM D638.
TABLE 1 sample Performance test data
| Sample (I) | Flexural modulus/(kg/cm)2) | Elongation at break/(%) |
| Example 1 | 78 | 611 |
| Example 2 | 76 | 605 |
| Example 3 | 77 | 607 |
| Example 4 | 68 | 598 |
| Example 5 | 71 | 604 |
| Example 6 | 73 | 588 |
| Example 7 | 67 | 592 |
| Example 8 | 72 | 576 |
| Example 9 | 69 | 598 |
| Comparative example 1 | 61 | 525 |
| Comparative example 2 | 54 | 486 |
| Comparative example 3 | 66 | 588 |
| Comparative example 4 | 62 | 576 |
| Comparative example 5 | 63 | 572 |
| Comparative example 6 | 67 | 588 |
| Comparative example 7 | 70 | 573 |
| Comparative example 8 | 72 | 579 |
| Comparative example 9 | 65 | 570 |
| Comparative example 10 | 64 | 588 |
| Comparative example 11 | 72 | 602 |
| Comparative example 12 | 70 | 606 |
From the various performance data of the samples in table 1 it can be seen that:
the jute fiber/nitrile rubber/low-density polyethylene compound has the function of improving the toughness and tensile property of the sole, so that the crack resistance of the sole is improved;
the jute fiber/low-density polyethylene compound has the function of improving the toughness and tensile property of the sole, but the property improving effect of the jute fiber/nitrile rubber/low-density polyethylene compound is obviously smaller than that of the jute fiber/nitrile rubber/low-density polyethylene compound;
the nitrile rubber/low-density polyethylene compound has the function of improving the toughness and tensile property of the sole, but the performance improvement effect of the nitrile rubber/low-density polyethylene compound is obviously smaller than that of a jute fiber/nitrile rubber/low-density polyethylene compound;
the low-density polyethylene has the function of improving the toughness and tensile property of the sole, but the performance improvement effect of the low-density polyethylene is obviously smaller than that of a jute fiber/low-density polyethylene compound and a nitrile rubber/low-density polyethylene compound; in conclusion, the jute fiber, the nitrile rubber and the low-density polyethylene have a certain synergistic effect, and the compound has the most obvious effect of improving the cracking resistance of the sole.
The change of the proportion of the jute fiber, the nitrile rubber and the low-density polyethylene can influence the crack resistance of the sole, so the compounding ratio of the jute fiber, the nitrile rubber and the low-density polyethylene needs to be controlled in a proper range.
The change in the addition ratio between the rice husk ash and the calcium carbonate also affects the crack resistance of the shoe sole, and therefore, the addition ratio of the rice husk ash and the calcium carbonate needs to be controlled within a proper range.
Alkali treatment or ultraviolet lamp irradiation treatment is carried out on the jute fiber, which is beneficial to improving the crack resistance of the sole.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. An EVA sole comprises the following components in parts by weight: 50-70 parts of EVA (ethylene vinyl acetate), 20-30 parts of modified low-density polyethylene, 10-20 parts of filler, 10-15 parts of flame retardant, 5-8 parts of color master batch, 2-4 parts of foaming agent, 0.4-0.8 part of bridging agent, 0.2-0.4 part of accelerator, 0.5-0.6 part of stearic acid, 0.3-0.5 part of N, N' -ethylene bis stearamide and 0.1-0.2 part of triallyl isocyanurate; the modified low-density polyethylene is a jute fiber/nitrile rubber/low-density polyethylene compound.
2. The EVA shoe sole of claim 1, wherein: the preparation method of the jute fiber/nitrile rubber/low density polyethylene compound comprises the following steps:
A1. pretreatment of jute fiber: treating jute fiber with 2% Na2CO3 solution, drying, irradiating jute fiber with ultraviolet lamp for 30-40min, and pulverizing jute fiber into powder;
A2. compounding treatment: uniformly blending jute fiber powder, nitrile butadiene rubber emulsion and low-density polyethylene emulsion;
A3. and (3) post-treatment: and extruding the blend by a double-screw extruder and then performing injection molding to obtain the jute fiber/nitrile rubber/low density polyethylene.
3. The EVA shoe sole of claim 1, wherein: the mass fraction ratio of the jute fiber, the nitrile rubber and the low-density polyethylene is (25-35%): (15% -20%): (45% -60%).
4. The EVA shoe sole of claim 1, wherein: the filler is prepared from the following components in percentage by mass: (1-2.5) rice hull ash and calcium carbonate powder.
5. The EVA shoe sole of claim 1, wherein: the flame retardant is magnesium hydroxide.
6. The EVA shoe sole of claim 1, wherein: the foaming agent is an AC foaming agent.
7. The EVA shoe sole of claim 1, wherein: the bridging agent is BIPB.
8. The EVA shoe sole of claim 1, wherein: the accelerant is zinc oxide.
9. The preparation process of the EVA sole of any one of claims 1-8, which comprises the following steps:
s1, banburying, namely adding EVA, modified low-density polyethylene, a filler and a flame retardant into a banbury mixer for mixing, then adding a bridging agent and an accelerator for vulcanization treatment, then adding a foaming agent, stearic acid and N, N' -ethylene bis-stearamide for continuous banburying, and finally adding color master batches for color mixing, wherein the banburying temperature is 160-170 ℃, and the banburying time is 10-20 min;
s2, open smelting: conveying the internal mixing material to an open mill to be pressed into strips;
s3, cooling: cooling the strip-shaped object to 40-45 ℃ by a plurality of cooling rollers to form the strip-shaped object;
s4, slitting: cutting the formed strip-shaped object to obtain a sheet-shaped preform;
s5, mould pressing: placing the preformed product on a mold for mold pressing treatment, wherein the mold pressing temperature is 170-;
s6, trimming: and (4) performing edge cutting treatment on the pre-formed product after the pressing is finished to obtain a finished product.
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| CN111944228B (en) * | 2020-08-18 | 2022-12-09 | 温州金鸿远鞋业有限公司 | Wear-resistant sole and preparation process thereof |
| CN112280207A (en) * | 2020-09-29 | 2021-01-29 | 温州市剑利鞋业有限公司 | Anti-crack sole and preparation process thereof |
| CN112280207B (en) * | 2020-09-29 | 2022-05-03 | 温州市剑利鞋业有限公司 | Anti-crack sole and preparation process thereof |
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