阅读说明：本技术 一种透气吸汗eva发泡鞋材的制备方法 (Preparation method of breathable sweat-absorbent EVA (ethylene-vinyl acetate copolymer) foamed shoe material ) 是由 陶相琴 于 2021-02-01 设计创作，主要内容包括：本发明公开了一种透气吸汗EVA发泡鞋材的制备方法,所述透气吸汗EVA发泡鞋材,以重量份为单位,包括以下原料：马来酸酐接枝EVA树脂96-115份、改性纳米二氧化钛3.5-4.3份、乙烯-辛烯共聚物10-14份、聚乳酸3-5份、碳酸镁6-8份、填充添加剂7-10份、苯磺酰肼1-2份、二氨基环己烷1.2-2.3份、过氧化二异丙苯1-1.5份、改性抗菌添加剂2-3份,所述鞋材是经过混合、造粒、发泡等步骤制成的。本发明制得的透气吸汗EVA发泡鞋材可解决现有鞋材透气效果、吸汗效果和抗菌性能比较差的问题,有效提高鞋材的透气性、吸汗性和抗菌性,有效增强环保性和舒适性。(The invention discloses a preparation method of a breathable sweat-absorbing EVA (ethylene vinyl acetate copolymer) foamed shoe material, which comprises the following raw materials in parts by weight: 96-115 parts of maleic anhydride grafted EVA resin, 3.5-4.3 parts of modified nano titanium dioxide, 10-14 parts of ethylene-octene copolymer, 3-5 parts of polylactic acid, 6-8 parts of magnesium carbonate, 7-10 parts of filling additive, 1-2 parts of benzenesulfonyl hydrazide, 1.2-2.3 parts of diaminocyclohexane, 1-1.5 parts of dicumyl peroxide and 2-3 parts of modified antibacterial additive, wherein the shoe material is prepared by the steps of mixing, granulating, foaming and the like. The breathable sweat-absorbent EVA foamed shoe material prepared by the invention can solve the problem that the existing shoe material is poor in breathable effect, sweat-absorbent effect and antibacterial property, effectively improves the breathable property, sweat-absorbent property and antibacterial property of the shoe material, and effectively enhances the environmental protection property and comfortableness.)

1. The breathable sweat-absorbing EVA foamed shoe material is characterized by comprising the following raw materials in parts by weight: 96-115 parts of maleic anhydride grafted EVA resin, 3.5-4.3 parts of modified nano titanium dioxide, 10-14 parts of ethylene-octene copolymer, 3-5 parts of polylactic acid, 6-8 parts of magnesium carbonate, 7-10 parts of filling additive, 1-2 parts of benzenesulfonyl hydrazide, 1.2-2.3 parts of diaminocyclohexane, 1-1.5 parts of dicumyl peroxide and 2-3 parts of modified antibacterial additive;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the rotation speed of 400r/min at the temperature of 98 ℃, and then cooling to room temperature to prepare the modified antibacterial additive;

the preparation method of the breathable sweat-absorbing EVA foamed shoe material comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing at the microwave power of 100-200W and the temperature of 120-125 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, the benzenesulfonyl hydrazide, the diaminocyclohexane and the dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing at the microwave power of 150-;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

2. The air-permeable sweat-absorbing EVA foamed shoe material of claim 2, which is characterized by comprising the following raw materials in parts by weight: 100-112 parts of maleic anhydride grafted EVA resin, 3.6-4.1 parts of modified nano titanium dioxide, 11-13 parts of ethylene-octene copolymer, 3-4 parts of polylactic acid, 7-8 parts of magnesium carbonate, 8-9 parts of filling additive, 1.2-1.8 parts of benzenesulfonyl hydrazide, 1.4-2.1 parts of diaminocyclohexane, 1.2-1.4 parts of dicumyl peroxide and 2.2-2.7 parts of modified antibacterial additive.

3. The air-permeable sweat-absorbing EVA foamed shoe material of claim 2, which is characterized by comprising the following raw materials in parts by weight: 110 parts of maleic anhydride grafted EVA resin, 4 parts of modified nano titanium dioxide, 12 parts of ethylene-octene copolymer, 4 parts of polylactic acid, 7 parts of magnesium carbonate, 9 parts of filling additive, 1.6 parts of benzenesulfonyl hydrazide, 2 parts of diaminocyclohexane, 1.3 parts of dicumyl peroxide and 2.4 parts of modified antibacterial additive.

4. The breathable and sweat-absorbent EVA foamed shoe material of any one of claims 1-3, wherein the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain the modified nano titanium dioxide.

5. The breathable, sweat-absorbent EVA foamed shoe material of any of claims 1-3, wherein the filler additive consists of stearic acid, corn fiber, ceramic particles, nano zinc oxide, ultra-fine calcium carbonate, palmitic acid.

6. The air permeable and sweat absorbing EVA foamed shoe material of claim 5, wherein the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid in a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3.

7. The method for preparing the breathable and sweat-absorbent EVA foamed shoe material of claim 1, wherein in the step (1), the mixture is mixed for 10-15min at a microwave power of 100-200W and a temperature of 120-125 ℃ to obtain a primary mixture.

8. The method for preparing the breathable and sweat-absorbent EVA foamed shoe material as claimed in claim 1, wherein in the step (2), the mixture is mixed for 5-8min at the microwave power of 150-250W and the temperature of 115-123 ℃ to obtain the secondary mixture.

9. The method for preparing the air permeable and sweat absorbing EVA foamed shoe material of claim 1, wherein the granulation length in step (3) is 1.5-2.5 mm.

Technical Field

The invention belongs to the technical field of shoe material preparation, and particularly relates to a preparation method of a breathable sweat-absorbing EVA (ethylene vinyl acetate) foamed shoe material.

Background

Shoes are now a necessity in daily life. However, most of shoe materials sold in the market are made of foaming materials, the ventilation effect and the sweat absorption effect are poor, the interior of the shoe is often hot and humid, so that a large amount of bacteria are generated on the foot, a lot of diseases are easily generated on the foot after the shoe is worn for a long time, extremely unpleasant odor is generated, the foot is also extremely itchy and unbearable, and the normal life and study of people are influenced.

Compared with polyethylene, EVA has low crystallinity, high flexibility, high impact resistance, high stuffing intermiscibility and high heat sealing performance owing to the introduction of vinyl acetate monomer into the molecular chain. The EVA midsole is a midsole formed by injecting EVA into a mold and heating at a high temperature, and is also called a one-step foaming midsole. The traditional EVA is hot-pressed, an EVA injection machine directly injects EVA particles into a machine table mold, the mold is opened after vacuum vulcanization is carried out for about 400s, the sole in the mold is foamed and molded, and then the mold is shaped by a hot and cold shaping box. The method features high output and one-step forming. Has the disadvantages of easy deformation, yellowing and shrinkage after a long time, and weak antibacterial property.

The Chinese patent application document 'an EVA (ethylene vinyl acetate) foaming shoe material and a preparation method thereof (application publication number: CN 111607185A)' discloses an EVA foaming shoe material and a preparation method thereof, wherein the EVA foaming shoe material is prepared from the following raw materials in parts by weight: 52-72 parts of maleic anhydride grafted EVA resin, 8.5-12.5 parts of ethylene-octene copolymer, 2.2-5.2 parts of magnesium carbonate, 0.3-1.3 parts of benzenesulfonyl hydrazide, 0.2-0.8 part of dicumyl peroxide, 0.6-1.6 parts of diaminocyclohexane, 1.2-3.2 parts of modified nano titanium dioxide and 1.4-4.4 parts of filling agent. According to the EVA foaming shoe material, the maleic anhydride grafted EVA resin has good elasticity and weather resistance, and is good in compatibility with a middle sole and an outsole when being used as a sole material, and the EVA foaming shoe material obtained by adding the modified nano titanium dioxide and the filler has moderate hardness, good wear resistance and comfort, but has the problem of weak antibacterial performance.

Disclosure of Invention

The invention provides a breathable sweat-absorbent EVA (ethylene-vinyl acetate copolymer) foamed shoe material and a preparation method thereof, and aims to solve the problems that the shoe material prepared by the prior art is poor in antibacterial performance and relatively poor in breathable effect and sweat-absorbent effect.

In order to solve the technical problems, the invention adopts the following technical scheme:

a breathable sweat-absorbent EVA foamed shoe material comprises the following raw materials in parts by weight: 96-115 parts of maleic anhydride grafted EVA resin, 3.5-4.3 parts of modified nano titanium dioxide, 10-14 parts of ethylene-octene copolymer, 3-5 parts of polylactic acid, 6-8 parts of magnesium carbonate, 7-10 parts of filling additive, 1-2 parts of benzenesulfonyl hydrazide, 1.2-2.3 parts of diaminocyclohexane, 1-1.5 parts of dicumyl peroxide and 2-3 parts of modified antibacterial additive;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: and (3) adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the temperature of 98 ℃ and the rotating speed of 400r/min, and then cooling to room temperature to prepare the modified antibacterial additive.

Preferably, the feed comprises the following raw materials in parts by weight: 100-112 parts of maleic anhydride grafted EVA resin, 3.6-4.1 parts of modified nano titanium dioxide, 11-13 parts of ethylene-octene copolymer, 3-4 parts of polylactic acid, 7-8 parts of magnesium carbonate, 8-9 parts of filling additive, 1.2-1.8 parts of benzenesulfonyl hydrazide, 1.4-2.1 parts of diaminocyclohexane, 1.2-1.4 parts of dicumyl peroxide and 2.2-2.7 parts of modified antibacterial additive.

Preferably, the feed comprises the following raw materials in parts by weight: 110 parts of maleic anhydride grafted EVA resin, 4 parts of modified nano titanium dioxide, 12 parts of ethylene-octene copolymer, 4 parts of polylactic acid, 7 parts of magnesium carbonate, 9 parts of filling additive, 1.6 parts of benzenesulfonyl hydrazide, 2 parts of diaminocyclohexane, 1.3 parts of dicumyl peroxide and 2.4 parts of modified antibacterial additive.

Preferably, the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain the modified nano titanium dioxide.

Preferably, the filling additive is composed of stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid.

Preferably, the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid according to a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3.

The invention also provides a preparation method of the breathable sweat-absorbing EVA foaming shoe material, which comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing at the microwave power of 100-200W and the temperature of 120-125 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, the benzenesulfonyl hydrazide, the diaminocyclohexane and the dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing at the microwave power of 150-;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

Preferably, the step (1) is carried out at the microwave power of 100-.

Preferably, in the step (2), the mixture is mixed for 5-8min at the microwave power of 150-.

Preferably, the length of the granules in step (3) is 1.5-2.5 mm.

The invention has the following beneficial effects:

(1) the polylactic acid and the modified antibacterial additive play a synergistic role in the process of preparing the breathable sweat-absorbing EVA foaming shoe material, and the antibacterial property of the breathable sweat-absorbing EVA foaming shoe material is synergistically improved because: the hydrolyzed polylactic acid system is acidic, and the acidic system can inhibit the growth of staphylococcus aureus so as to kill the staphylococcus aureus; the added modified antibacterial additive is prepared by mixing 2, 6-toluene diisocyanate, 4-methoxyphenylacetaldehyde, silver acetate and propanol, adding diatomite and potassium borohydride into the mixture, stirring under microwave, adding 2-hexyl-3-octyl-4, 5-dihydroxyoctylcyclohexane, a silane coupling agent KH792 and ammonium bicarbonate into the obtained material, stirring under microwave, and cooling to room temperature; according to the invention, the antibacterial performance of 4-methoxyphenylacetaldehyde is fully utilized, the viscosity of 2, 6-toluene diisocyanate and 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane is utilized, the combination of 4-methoxyphenylacetaldehyde and potassium borohydride is effectively realized under the coupling action of a silane coupling agent KH792, and polylactic acid is applied to the preparation of the breathable sweat-absorbing EVA foamed shoe material, so that the antibacterial performance of the breathable sweat-absorbing EVA foamed shoe material is synergistically improved.

(2) The antibacterial performance of the breathable sweat-absorbing EVA foamed shoe material prepared by the invention is obviously higher than that of the breathable sweat-absorbing EVA foamed shoe material prepared by the prior art, and is at least improved by 359.4 percent, which shows that the breathable sweat-absorbing EVA foamed shoe material has obvious progress.

(3) The breathable sweat-absorbent EVA foamed shoe material prepared by the invention can effectively solve the problem that the breathable effect and the sweat-absorbent effect of the existing shoe material are poor, can effectively improve the breathability and the sweat-absorbent property of the shoe material, and effectively enhances the environmental protection property and the comfort.

Detailed Description

In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.

In the embodiment, the breathable sweat-absorbent EVA foamed shoe material comprises the following raw materials in parts by weight: 96-115 parts of maleic anhydride grafted EVA resin, 3.5-4.3 parts of modified nano titanium dioxide, 10-14 parts of ethylene-octene copolymer, 3-5 parts of polylactic acid, 6-8 parts of magnesium carbonate, 7-10 parts of filling additive, 1-2 parts of benzenesulfonyl hydrazide, 1.2-2.3 parts of diaminocyclohexane, 1-1.5 parts of dicumyl peroxide and 2-3 parts of modified antibacterial additive;

the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion liquid with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain modified nano titanium dioxide;

the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid according to a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the rotation speed of 400r/min at the temperature of 98 ℃, and then cooling to room temperature to prepare the modified antibacterial additive;

the preparation method of the EVA foaming shoe material comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing for 10-15min at the microwave power of 100-200W and the temperature of 120-125 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, benzenesulfonyl hydrazide, diaminocyclohexane and dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing for 5-8min at the microwave power of 150-250W and the temperature of 115-123 ℃ to obtain a secondary mixture;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, wherein the granulation length is 1.5-2.5mm, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

The following is a more specific example.

Example 1

A breathable sweat-absorbent EVA foamed shoe material comprises the following raw materials in parts by weight: 100 parts of maleic anhydride grafted EVA resin, 3.7 parts of modified nano titanium dioxide, 10 parts of ethylene-octene copolymer, 3 parts of polylactic acid, 6 parts of magnesium carbonate, 8 parts of filling additive, 1 part of benzenesulfonyl hydrazide, 1.5 parts of diaminocyclohexane, 1 part of dicumyl peroxide and 2 parts of modified antibacterial additive;

the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion liquid with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain modified nano titanium dioxide;

the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid according to a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the rotation speed of 400r/min at the temperature of 98 ℃, and then cooling to room temperature to prepare the modified antibacterial additive;

the preparation method of the EVA foaming shoe material comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing for 15min at the microwave power of 100W and the temperature of 120 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, benzenesulfonyl hydrazide, diaminocyclohexane and dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing for 8min at the microwave power of 160W and the temperature of 117 ℃ to obtain a secondary mixture;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, wherein the granulation length is 1.7mm, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

Example 2

A breathable sweat-absorbent EVA foamed shoe material comprises the following raw materials in parts by weight: 110 parts of maleic anhydride grafted EVA resin, 4 parts of modified nano titanium dioxide, 12 parts of ethylene-octene copolymer, 4 parts of polylactic acid, 7 parts of magnesium carbonate, 9 parts of filling additive, 1.6 parts of benzenesulfonyl hydrazide, 2 parts of diaminocyclohexane, 1.3 parts of dicumyl peroxide and 2.4 parts of modified antibacterial additive;

the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion liquid with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain modified nano titanium dioxide;

the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid according to a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the rotation speed of 400r/min at the temperature of 98 ℃, and then cooling to room temperature to prepare the modified antibacterial additive;

the preparation method of the EVA foaming shoe material comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing for 12min at the microwave power of 180W and the temperature of 123 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, benzenesulfonyl hydrazide, diaminocyclohexane and dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing for 7min at the microwave power of 220W and the temperature of 120 ℃ to obtain a secondary mixture;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, wherein the granulation length is 2m m, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

Example 3

A breathable sweat-absorbent EVA foamed shoe material comprises the following raw materials in parts by weight: 112 parts of maleic anhydride grafted EVA resin, 4.2 parts of modified nano titanium dioxide, 13 parts of ethylene-octene copolymer, 5 parts of polylactic acid, 8 parts of magnesium carbonate, 10 parts of filling additive, 2 parts of benzenesulfonyl hydrazide, 2.2 parts of diaminocyclohexane, 1.5 parts of dicumyl peroxide and 3 parts of modified antibacterial additive;

the preparation method of the modified nano titanium dioxide comprises the following steps: preparing 10g of nano titanium dioxide into dispersion liquid with the mass fraction of 23%, then adding 3.2g of water glass, dropwise adding 1.3mL of 0.4mol/L acetic acid solution, grinding and dispersing for 5min, then carrying out heat preservation reaction at the temperature of 53 ℃ for 1.2h, and finally carrying out suction filtration and drying to obtain modified nano titanium dioxide;

the filling additive is prepared from stearic acid, corn fiber, ceramic particles, nano zinc oxide, superfine calcium carbonate and palmitic acid according to a mass ratio of 1: 2: 0.9: 1.7: 2.8: 2.3;

the preparation method of the modified antibacterial additive comprises the following steps:

the method comprises the following steps: stirring 3 parts by weight of 2, 6-toluene diisocyanate, 2 parts by weight of 4-methoxyphenylacetaldehyde, 1 part by weight of silver acetate and 5 parts by weight of propanol at the rotating speed of 200r/min for 12min to obtain a mixture;

step two: adding 3.2 parts of kieselguhr and 1.2 parts of potassium borohydride into the mixture prepared in the first step, and stirring for 25min at the microwave power of 160W, the temperature of 44 ℃ and the rotating speed of 500r/min to obtain a material;

step three: adding 5.6 parts of 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane, 2 parts of silane coupling agent KH792 and 1.5 parts of ammonium bicarbonate into the material prepared in the second step, stirring for 30min at the microwave power of 200W and the rotation speed of 400r/min at the temperature of 98 ℃, and then cooling to room temperature to prepare the modified antibacterial additive;

the preparation method of the EVA foaming shoe material comprises the following steps:

(1) adding the maleic anhydride grafted EVA resin, the ethylene-octene copolymer, the modified nano titanium dioxide and the filling additive in parts by weight into an internal mixer, and mixing for 10min at the microwave power of 200W and the temperature of 124 ℃ to obtain a primary mixture;

(2) adding the magnesium carbonate, benzenesulfonyl hydrazide, diaminocyclohexane and dicumyl peroxide in parts by weight into the primary mixture obtained in the step (1), and mixing for 5min at the microwave power of 250W and the temperature of 122 ℃ to obtain a secondary mixture;

(3) and (3) adding the polylactic acid and the modified antibacterial additive in parts by weight into the secondary mixture obtained in the step (2), mixing, then transferring into a granulator for granulation, wherein the granulation length is 2.4mm, and finally foaming to obtain the breathable sweat-absorbing EVA foamed shoe material.

Comparative example 1

The process is substantially the same as that of example 2, except that the materials for preparing the breathable and sweat-absorbent EVA foam shoe material lack polylactic acid and modified antimicrobial additives.

Comparative example 2

The process was essentially the same as that used in example 2, except that the materials used to make the breathable and moisture absorbing EVA foam shoe material were devoid of polylactic acid.

Comparative example 3

The procedure of example 2 was followed except that the modified antimicrobial additive was absent from the materials used to make the breathable and moisture absorbing EVA foam shoe material.

Comparative example 4

The EVA foamed shoe material was prepared by the process of examples 1 to 5 in "an EVA foamed shoe material and its preparation method (application publication No. CN 111607185A)" of Chinese patent application.

The EVA foamed shoe materials prepared in examples 1-3 and comparative examples 1-4 were tested for antibacterial performance, and the antibacterial performance was tested by QB/T4341-2012, and the results are shown in the following table:

from the above table, it can be seen that:

(1) as can be seen from the data of examples 1-3 and comparative example 4, the antibacterial performance of the breathable sweat-absorbing EVA foamed shoe materials prepared in examples 1-3 is significantly higher than that of the breathable sweat-absorbing EVA foamed shoe material prepared in comparative example 4, and is at least 359.4% higher, which shows that the invention has significant progress.

(2) As can be seen from the comparison of the data of the example 2 and the comparative example 2, the antibacterial performance of the breathable sweat-absorbent EVA foamed shoe material prepared by the traditional polylactic acid is improved by 22.1 percent; as can be seen from the comparison of the data of example 2 and comparative example 3, the antibacterial performance of the breathable sweat-absorbent EVA foamed shoe material prepared by using the modified antibacterial additive of the invention is improved by 63.9%, which shows that the antibacterial performance of the modified antibacterial additive of the invention is higher than that of the traditional polylactic acid, and is improved by 189.1%, and further shows that the modified antibacterial additive of the invention has significant progress.

(3) As can be seen from the data of example 2 and comparative examples 1 to 3, the polylactic acid and the modified antibacterial additive play a synergistic role in the process of preparing the breathable sweat-absorbent EVA foamed shoe material, and synergistically improve the antibacterial performance of the breathable sweat-absorbent EVA foamed shoe material because: the hydrolyzed polylactic acid system is acidic, and the acidic system can inhibit the growth of staphylococcus aureus so as to kill the staphylococcus aureus; the added modified antibacterial additive is prepared by mixing 2, 6-toluene diisocyanate, 4-methoxyphenylacetaldehyde, silver acetate and propanol, adding diatomite and potassium borohydride into the mixture, stirring under microwave, adding 2-hexyl-3-octyl-4, 5-dihydroxyoctylcyclohexane, a silane coupling agent KH792 and ammonium bicarbonate into the obtained material, stirring under microwave, and cooling to room temperature; according to the invention, the antibacterial performance of 4-methoxyphenylacetaldehyde is fully utilized, the viscosity of 2, 6-toluene diisocyanate and 2-hexyl-3-octyl-4, 5-dihydroxyoctyl cyclohexane is utilized, the combination of 4-methoxyphenylacetaldehyde and potassium borohydride is effectively realized under the coupling action of a silane coupling agent KH792, and polylactic acid is applied to the preparation of the breathable sweat-absorbing EVA foamed shoe material, so that the antibacterial performance of the breathable sweat-absorbing EVA foamed shoe material is synergistically improved.

The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.