CN111543734A - Rubber-plastic puncture-preventing multifunctional sole and preparation method thereof - Google Patents

Abstract

The invention discloses a rubber-plastic puncture-preventing multifunctional sole and a preparation method thereof. The invention provides a comfortable leisure shoe sole for consumers in order to fully exert the respective advantages of the EVA rubber elastomer and the cork, improves the problems of poor wear resistance and tensile strength of the EVA material, and simultaneously enhances the resilience of the material; the problem of air impermeability of the EVA rubber composite elastomer is solved; in order to prevent dust from entering the shoe and having poor foot protection effect caused by the eyelet network structure of the outer bottom layer, the middle layer uses breathable puncture-proof cloth with proper thickness as a functional layer, so that dust can be prevented from entering the middle layer, and the foot can be protected from being pricked by sharp objects.

Description

A kind of rubber-plastic anti-puncture multifunctional sole and preparation method thereof

technical field

The invention relates to the technical field of shoe processing, in particular to an EVA rubber-plastic elastomer anti-puncture multifunctional sole and a preparation method thereof.

Background technique

In today's shoe market, more than 70% of the sole materials of sports shoes and travel shoes in my country are made of EVA rubber and plastic foam materials. EVA foam material has been widely used because of its lightness, good elasticity, good flexibility, not easy to wrinkle, excellent colorability, suitable for various climates, etc. Defects such as airtightness and poor wear resistance can easily cause odor in the shoe cavity.

Cork is a natural renewable substance with numerous tiny cork cells, high resilience, high friction coefficient, water resistance, aging resistance, oil resistance, high and low temperature resistance (-60--+80℃), compression recovery, sound insulation And anti-moth-eaten, cork gives the human body a warm and soft foot feel, and is a natural high-end shoe material.

Among the existing shoe products and their ancillary products in the market, there is no good solution to deal with sharp objects piercing the sole of the shoe and then hurting the human body. In order to increase the ventilation performance, some products adopt the ventilation hole structure of the outsole, which is complicated in structure and high in cost. , The dustproof effect is poor. A shoe product that combines excellent comfort, tensile and dust resistance, light weight and foreign body stab resistance, and effective improvement of foot comfort is quite demanded by the current market.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a rubber-plastic elastomer anti-puncture multi-functional sole and a preparation method thereof, so as to solve the problems of airtightness, slippery and smelly wearing of the existing EVA foam sole, and at the same time, it can prevent walking while exercising. A long time will cause the sole to slip and grind the bubble.

In order to solve the above technical problems, the technical solution provided by the present invention is: a rubber-plastic anti-puncture multifunctional sole and a preparation method thereof, comprising a sole body, the sole body comprises an upper, middle and lower three-layer structure, the upper layer is a contact layer, and the middle layer is a contact layer. It is a protective layer, the lower layer is an elastic layer, the contact layer is a cork layer formed by cork particles, the protective layer is an anti-puncture Buna filling layer, and the elastic layer is an EVA rubber elastomer layer.

As an improvement, the cork layer is formed by molding cork particles, with a thickness of 1.2-1.6 mm and a hardness of Shore A38-40; the protective layer is a three-dimensional woven fabric with a thickness of 1.2-2.5 mm; the elastic The layer thickness is 9.6-10.5mm, and the hardness is Shore A50-60. The three-dimensional weaving process of the protective layer, the three-dimensional weaving structure of this structure is based on the general flat-layer weaving. After the flat-layer weaving of each knitting unit, the longitudinal wire harness is woven upward and the horizontal wire harness of another flat-layer space is woven and crossed again, and is crossed with the lower side. The weaving units together form a brand new weaving unit, and so on. According to the needs, the weaving scheme is implemented in multiple spaces and in multiple directions. It can be woven in two layers of space or multi-layered in space. Its functional effect is much greater than that of direct ordinary The performance effect of the superposition of two layers of fabric, and the thickness is thinner than that of the two layers directly superimposed, the actual size of the space occupied is smaller, but the technical effect of several times the toughness and strength of a single piece of material can be achieved, and the sense of space inside the woven layer is relatively general. The single-layer textile process is more abundant and the ventilation effect is better.

As an improvement, the cork layer of the contact layer is a cork splicing surface material with a thickness of 1.2-1.6mm and a hardness of Shore A38-40; the thickness of the protective layer is 1.2-2.5mm; the thickness of the elastic layer is 9.6-10.5mm, hardness is Shore A50-60. Multiple cork pieces are directly spliced and formed, and the operation and production process is simpler and more convenient.

As an improvement, the thickness ratio of the contact layer, the protective layer, and the elastic layer is 6:7:37.

As an improvement, the contact layer, the protective layer and the elastic layer, the outer edge of the contact layer is provided with a downturned hem, and the outer edge of the protective layer is provided with a downturned hem, and after the elastic layer and the protective layer are laminated It is embedded in the folded edge of the protective layer, then attached to the contact layer and embedded in the folded edge of the contact layer. After the contact layer, the protective layer and the elastic layer are pasted together, the lower end of the folded edge of the contact layer and the lower end of the folded edge of the protective layer are respectively connected with the elastic layer. The bottom end face of the layer is flush. To achieve fit and alignment, the integrity is better, after molding, the overall strength is better, and the service life is longer.

As an improvement, the structural member of the elastic layer obtained after the EVA rubber-plastic elastomer is molded and foamed is provided with a network line-shaped cross-distributed hole group structure, and the hole diameter is 0.5-0.8mm. On the molded EVA rubber-plastic elastomer, a hole group structure is set up, and the hole group structure is formed into a network linear cross, in an irregular distribution state, the position of the air dispersion and discharge is wider and more comprehensive, and the ventilation effect is better; The group structure can also be set in parallel and in rows, which is convenient for processing and simple in process, and the ventilation position is easy to be set centrally. According to people of different ages or different latitudes, specific settings are made, and the effect of targeted ventilation and heat dissipation is better.

As an improvement, the eyelet group structure is centrally arranged on the arch of the foot and the ball of the forefoot. The structure of the eyelet group is designed at the main sweat vapor evaporation position to maximize the evaporation of sweat vapor, and at the same time reduce the processing of the number of eyelet groups. There are few or no eyelet groups in other areas to ensure the actual tensile strength of the sole as a whole and simplify the processing. craft.

A preparation method of a rubber-plastic anti-puncture multifunctional sole and a preparation method thereof, comprising the following steps:

1), prepare the contact layer: take 45-50 mass fractions of cork particles processed and pulverized with cork raw materials, 45-50 mass fractions of single-component FZ-506 polyurethane, 5-10 mass fractions of lubricant stearic acid, The above-mentioned materials are put into a kneader to carry out a kneading process to obtain kneaded rubber, and then molding is performed, and the obtained molding raw materials are trimmed and formed for use.

2), prepare the elastic layer: one-time banburying: add the described EVA5110J, EPDM, modified starch, POE, zinc oxide, zinc stearate into the banbury mixer for banburying for 6min, and the ambient temperature is maintained at 110-120 ℃ ; Secondary Banbury: Continue to add the foaming agent AC to the Banbury mixer for 3min; Third Banbury: Add the crosslinking agent to the Banbury mixer and continue Banbury for 3min to obtain a mixture; Pull the obtained mixture on the open mixer The sheet was molded and foamed with a special template on a flat-panel foaming machine to obtain an intermediate layer elastic shoe material with suitable thickness and structure. The molding foaming time was 6 minutes, and the molding temperature was set at 170 °C.

3) Prepare the protective layer, select pulped high-tenacity spinning threads, and use three-dimensional textiles to create a three-dimensional fabric space. At the same time, the thickness of the fabric is increased, and the toughness is greatly enhanced at the same time; the selected anti-puncture fabric is cut into shape and ready for use. In the pulping process, a sizing dye penetrant is added to improve the toughness uniformity of the single cross-sectional area of the spinning thread, the uniformity is improved, and the overall strength stability is improved, and then three-dimensionally woven textile fabrics, single-layer fabrics can reach the same raw materials as ordinary textile process fabrics The toughness of several layers is superimposed, and the overall toughness strength is greatly improved. The high-tenacity spinning thread is made of textile fibers and TPU.

4), place the base material obtained in steps 1), 2), and 3) in order from bottom to top as an elastic layer, a protective layer, and a contact layer, apply glue between the layers, fit neatly, and heat and press to form the obtained product. product required.

As an improvement, in the step 4), heating the molding process, the heating temperature is 170 ° C, the molding pressure is 4-10 MPa, the pressing is continued for 30 s, the mold is trimmed, and the desired product is obtained.

As an improvement, the modified starch is grafted from corn starch through vinyl acetate, and contains ester groups that can be chemically cross-linked with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer. Therefore, the elastic layer of the composite material has better hygroscopicity, and the specific hygroscopic volume accounts for 5%-8% of its own weight.

As an improvement, in the step 1), stearic acid and modified starch are simultaneously added to the internal mixer. Ensure that the two are fully mixed to ensure that the roller does not stick during the banburying process.

As an improvement, in the step 2), the mixing temperature at which the foaming agent AC is added to the internal mixer is 120°C, and the obtained mixture is pulled in the open mixer; Pull the sheet, foam by molding to obtain the middle layer elastic shoe material with suitable thickness, and then foam by molding, the foaming time is 6min, the ambient temperature is 170°C, and the pressure is 8MPa. The finished EVA rubber-plastic elastomer foamed shoe material with the thickness and structure of the elastic layer meeting the requirements can be obtained, the general thickness is 9.6-10.5mm, and the shoe sole shape of the required size can be cut.

As an improvement, the molding material of the puncture-proof layer is provided with at least three evenly distributed through holes in the front and rear. In the process of gluing, the gluing flows into the through-hole, and other sag bonding is realized on the basis of contact bonding with the upper and lower adjacent layers. After molding, the overall connection quality is stable and better, the material is more comfortable, and the service life is longer. .

Cork/EVA elastomer of the present invention is used in the method for making highly breathable soles, the outermost layer of EVA rubber-plastic elastomer used is composed of EVA, EPDM (ethylene-propylene-diene rubber), POE (ethylene and octene copolymerization) material) foam materials based on three materials.

By designing a superimposed three-layer structure, and using cork particles/or cork splicing surface material composite material on the upper layer, the cork material has good adaptability to human feet, and the feet feel fine and comfortable, and the anti-slip performance is good. The lower layer, that is, the outermost layer, is made of EVA rubber elastomer material. In terms of structural design, it has a perforated network structure that can be breathed, which solves the airtight problem of EVA composite elastomer, and exerts the characteristics of good resilience and excellent wear resistance of EVA composite elastomer material. ; In the middle layer, a breathable and puncture-proof cloth with an appropriate thickness is used as the functional layer, which can not only block the entry of dust, but also protect the feet from being punctured by sharp objects, and solve the defect that dust is easy to enter in the hole network structure of the outer bottom layer.

The content of the present invention has the following characteristics:

(1) adopt the material that the outermost layer EVA elastomer material ratio of the present invention obtains, does not stick to the template during foaming, the product surface is flat, the product gap is uniform and compact, the elasticity is good, the compression resistance is good, and there is a good resistance to compression. Abrasiveness.

(2) The hollow network structure design of the outermost layer of the present invention has good air permeability, and the aperture of 0.5-0.8mm can prevent general stones and gravels from entering the shoe cavity.

(3) The upper cork layer prepared by the manufacturing method of the present invention has good flexibility, good adaptability to feet, fine and comfortable foot feel, and excellent anti-slip performance.

(4) The upper cork layer, the middle puncture-proof layer and the lower EVA rubber-plastic elastomer foam layer in the present invention are molded at high temperature, and the adhesion is firm.

The beneficial effects of the invention are as follows: in order to give full play to the respective advantages of the EVA rubber elastomer and cork, and to provide consumers with a comfortable sole for casual shoes, the invention first uses a special-structured EVA rubber-plastic composite material as the Sole composition structure. The composition is as follows: adding a certain amount of POE and EPDM to the EVA elastomer improves the problems of non-wearability and poor tensile strength of the EVA material, and at the same time enhances the resilience of the material; in the structural design of the outsole, the breathable air is added. The perforated network structure solves the airtight problem of the EVA rubber composite elastomer; in order to prevent the dust from entering the shoes caused by the perforated network structure of the outer bottom layer and the problem of poor foot protection, a puncture-proof anti-puncture with appropriate thickness and breathable is used in the middle layer. As a functional layer, the cloth material can not only block the entry of dust, but also protect the feet from being punctured by sharp objects; the cork composite material is used on the upper layer to give full play to the excellent comfort and excellent anti-slip performance of the cork layer and the feet. It can make the human body feel comfortable, and can prevent the shoes from slipping for a long time.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

1 is a schematic structural diagram of an embodiment of the present invention;

Fig. 2 is a side partial cross-sectional structural schematic diagram of Fig. 1;

FIG. 3 is a schematic diagram of the bonding structure of each structural layer in FIG. 1 .

Detailed ways

As shown in Figures 1, 2, and 3, the following technical solution includes the following embodiments:

Example 1

As shown in the figure, a rubber-plastic anti-puncture multifunctional sole and a preparation method thereof include a sole body 1, the sole body comprises an upper, middle and lower three-layer structure, the upper layer is a contact layer 2, the middle is a protective layer 3, and the lower layer is a Elastic layer 4, the contact layer is a cork layer formed by cork particles, the protective layer is an anti-puncture Buna filling layer, and the elastic layer is an EVA and rubber composite layer.

In this embodiment, the cork layer is molded from cork particles, with a thickness of 1.2 mm and a hardness of Shore A38; the protective layer is a three-dimensional woven fabric with a thickness of 1.2 mm; the elastic layer has a thickness of 9.6 mm, The hardness is Shore A50. The three-dimensional weaving process of the protective layer achieves the technical effect of increasing the toughness and strength of a single layer several times. At the same time, the sense of space is more abundant and the ventilation effect is better than that of ordinary textile processes.

In this embodiment, the cork layer of the contact layer is a cork splicing surface material, the thickness is 1.2mm, and the hardness is Shore A38; the thickness of the protective layer is 1.2mm; the thickness of the elastic layer is 9.6mm, and the hardness is Shore A38 Seoul A50.

In this embodiment, the thickness ratio of the contact layer, the protective layer, and the elastic layer is 6:7:37.

In this embodiment, the contact layer, the protective layer and the elastic layer, the outer edge of the contact layer is provided with a downturned hem, and the outer edge of the protective layer is provided with a downturned hem. After the elastic layer and the protective layer are bonded together It is embedded in the folded edge of the protective layer, and then attached to the contact layer and embedded in the folded edge of the contact layer. After the contact layer, the protective layer and the elastic layer are pasted together, the lower end of the folded edge of the contact layer and the lower end of the folded edge of the protective layer are respectively in the elastic The bottom end face of the layer is flush. To achieve fit and alignment, the integrity is better, after molding, the overall strength is better, and the service life is longer.

In this embodiment, the structural member of the elastic layer obtained after the EVA rubber-plastic elastomer is molded and foamed is provided with a network-shaped cross-distributed hole group structure 5, and the hole diameter is 0.5 mm.

In this embodiment, the eyelet group structures are centrally arranged on the arch of the foot and the forefoot. The structure of the eyelet group is designed at the main sweat vapor evaporation position to maximize the evaporation of sweat vapor, and at the same time reduce the processing of the number of eyelet groups. There are few or no eyelet groups in other areas to ensure the actual tensile strength of the sole as a whole and simplify the processing. craft.

A preparation method of a rubber-plastic anti-puncture multifunctional sole and a preparation method thereof, comprising the following steps:

1), prepare the contact layer: get the cork particle mass fraction 45 that cork raw material is processed and pulverized, the single-component FZ-506 polyurethane mass fraction 45, the lubricant stearic acid mass fraction 6, the above-mentioned materials are put into the mixing The mixing machine performs the mixing process to obtain the mixed rubber, and then carries out the molding, and the obtained molding raw material is cut and formed for later use.

2), prepare the elastic layer: one-time banburying: adding the described EVA5110J, EPDM, modified starch, POE, zinc oxide, zinc stearate to the banburying machine for banburying for 6min, and the temperature is maintained at 110 ° C; Banbury: add the foaming agent AC to the Banbury mixer for 3 minutes; three times Banbury: add the cross-linking agent and continue to Banbury for 3 minutes to obtain a mixture; pull the obtained mixture on an open mixer, and foam it on a flat plate On the machine, a special template is used for molding and foaming to obtain the middle layer elastic shoe material with suitable thickness and structure. Molding and foaming conditions: time 6min, molding temperature 170℃.

3) Prepare the protective layer, select pulped high-tenacity spinning threads, and use three-dimensional textiles to create a three-dimensional fabric space. At the same time, the thickness of the fabric is increased, and the toughness is greatly enhanced at the same time; the selected anti-puncture fabric is cut into shape and ready for use. In the pulping process, a sizing dye penetrant is added to improve the toughness uniformity of the single cross-sectional area of the spinning thread, the uniformity is improved, and the overall strength stability is improved, and then three-dimensionally woven textile fabrics, single-layer fabrics can reach the same raw materials as ordinary textile process fabrics The toughness of several layers is superimposed, and the overall toughness strength is greatly improved. The high-tenacity spinning thread is made of textile fibers and TPU.

4), place the base material obtained in steps 1), 2), and 3) in order from bottom to top as an elastic layer, a protective layer, and a contact layer, apply glue between the layers, fit neatly, and heat and press to form the obtained product. product required.

In this example, in the step 4), the molding process is heated, the heating temperature is 170° C., the molding pressure is 5 MPa, the molding time is 30 s, and the mold is trimmed to obtain the desired product.

In this embodiment, the modified starch is grafted from corn starch through vinyl acetate, and contains an ester group that can be chemically cross-linked with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer. Therefore, to realize that the elastic layer of the composite material has better hygroscopicity, in a specific test, in a standard environment, the amount accounts for 5% of its own weight.

In this embodiment, stearic acid and modified starch are simultaneously added to the internal mixer in the step 1). Ensure that the two are fully mixed to ensure that the roller does not stick during the banburying process.

In this embodiment, in the step 2), the temperature of the mixing environment where the foaming agent AC is added to the internal mixer is 120°C, and the obtained mixture is pulled in the open mixer; The above pull tab is molded and foamed to obtain an outer layer elastic shoe material with a thickness suitable for the requirements. The finished EVA rubber-plastic elastomer foamed shoe material with the thickness and structure of the elastic layer meeting the requirements can be obtained, the general thickness is 9.6-10.5mm, and the shoe sole shape of the required size can be cut.

In this embodiment, the molding material of the puncture-proof layer is provided with three evenly distributed through holes in the front and rear. In the process of gluing, the gluing flows into the through-hole, and other sag bonding is realized on the basis of contact bonding with the upper and lower adjacent layers. After molding, the overall connection quality is stable and better, the material is more comfortable, and the service life is longer. .

Embodiment 2

In this embodiment, the cork layer is molded from cork particles, with a thickness of 1.6 mm and a hardness of Shore A40; the protective layer is a three-dimensional woven fabric with a thickness of 1.8 mm; the elastic layer has a thickness of 10.5 mm, The hardness is Shore A60. The three-dimensional weaving process of the protective layer achieves the technical effect of increasing the toughness and strength of a single layer several times. At the same time, the sense of space is more abundant and the ventilation effect is better than that of ordinary textile processes.

In this embodiment, the cork layer of the contact layer is a cork splicing surface material, the thickness is 1.6mm, and the hardness is Shore A40; the thickness of the protective layer is 1.8mm; the thickness of the elastic layer is 10.5mm, and the hardness is Shore A40; Seoul A60.

In this embodiment, the structural member of the elastic layer obtained after the EVA rubber-plastic elastomer is molded and foamed is provided with a network-shaped cross-distributed hole group structure, and the hole diameter is 0.8 mm.

1), prepare the contact layer: get the cork particle mass fraction 50 that cork raw material is processed and pulverized, the single-component FZ-506 polyurethane mass fraction 50, the lubricant stearic acid mass fraction 10, the above-mentioned materials are put into the mixing The mixing machine performs the mixing process to obtain the mixed rubber, and then carries out the molding, and the obtained molding raw material is cut and formed for later use.

2), prepare the elastic layer: one-time banburying: adding the described EVA5110J, EPDM, modified starch, POE, zinc oxide, zinc stearate into the banbury mixer for banburying for 6min, and the ambient temperature is maintained at 120 ℃; two Secondary Banbury: Continue to add the foaming agent AC to the Banbury mixer for 3min; Third Banbury: Add the crosslinking agent to the Banbury mixer and continue Banbury for 3min to obtain a mixture; Pull the obtained mixture on the open mixer , use a special template for foaming on a flat-panel foaming machine to obtain a middle-layer elastic shoe material with suitable thickness and structure. Molding and foaming conditions: time 6min, molding temperature 170°C.

In this example, in the step 4), the heating molding process is performed, the heating temperature is 170° C., the molding pressure is 9 MPa, the pressing is continued for 30 s, and the mold is trimmed to obtain the desired product.

In this embodiment, the modified starch is grafted from corn starch through vinyl acetate, and contains an ester group that can be chemically cross-linked with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer. Therefore, the elastic layer of the composite material has better hygroscopicity than the pure EVA material. In the actual test, under the standard environment, and the temperature parameter is increased by 5 degrees Celsius alone, the specific moisture absorption amount accounts for 8% of its own weight.

In addition to the above-mentioned preferred embodiments, the present invention has other embodiments, and those skilled in the art can make various changes and deformations according to the present invention, as long as they do not depart from the spirit of the present invention, they should all belong to the protection scope of the present invention.

Claims (10)

1. The utility model provides a multi-functional sole of puncture is prevented to rubber and plastic, includes sole body (1), its characterized in that: the sole body is three layer construction under including last well, and the upper strata is contact layer (2), and the centre is inoxidizing coating (3), and the lower floor is elastic layer (4), the contact layer is the fashioned cork layer of cork granule, the inoxidizing coating is for preventing that the puncture cloth receives the filling layer, the elastic layer is EVA rubber elastomer layer.

2. The rubber-plastic puncture-preventing multifunctional sole as claimed in claim 1, wherein: the cork layer is formed by compression molding cork particles, the thickness is 1.2-1.6mm, and the hardness is Shore A38-40; the protective layer is a three-dimensional woven fabric, and the thickness of the protective layer is 1.2-2.5 mm; the thickness of the elastic layer is 9.6-10.5mm, and the hardness is Shore A50-60.

3. The rubber-plastic puncture-preventing multifunctional sole as claimed in claim 1 or 2, wherein: the cork layer of the contact layer is a cork splicing surface material, the thickness is 1.2-1.6mm, and the hardness is Shore A38-40; the thickness of the protective layer is 1.2-2.5 mm; the thickness of the elastic layer is 9.6-10.5mm, and the hardness is Shore A50-60.

4. The rubber-plastic puncture-preventing multifunctional sole as claimed in claim 3, wherein: the thickness proportion of the contact layer, the protective layer and the elastic layer is 6: 7: 37.

5. the rubber-plastic puncture-preventing multifunctional sole as claimed in claim 4, wherein: contact layer, inoxidizing coating, elastic layer, contact layer outer fringe are provided with the hem that turns over down, the inoxidizing coating outward fringe is provided with the hem that turns over down, and in embedding inoxidizing coating hem behind elastic layer and the inoxidizing coating laminating, then with the contact layer laminating and in the hem of embedding contact layer, after the laminating is accomplished to contact layer, inoxidizing coating, elastic layer, the lower extreme of contact layer hem is respectively in the bottom face parallel and level of elastic layer.

6. The rubber-plastic puncture-preventing multifunctional sole as claimed in claim 1, wherein: the structural member of the elastic layer obtained after the EVA rubber-plastic elastomer is subjected to mould pressing foaming is provided with a network linear cross distribution eyelet group structure (5), and the diameter of each eyelet is 0.5-0.8 mm.

7. The preparation method of the rubber-plastic puncture-preventing multifunctional sole according to claim 1, characterized in that: the method comprises the following steps: 1) and preparing a contact layer: taking 45-50 parts by weight of cork particles processed and crushed by a cork raw material, 45-50 parts by weight of single-component FZ-506 polyurethane and 5-10 parts by weight of stearic acid serving as a lubricant, putting the materials into a mixing roll, carrying out a mixed rubber process to prepare mixed rubber, then carrying out compression molding, and cutting and trimming the prepared molded raw material for later use; 2) preparing an elastic layer: primary banburying: adding the EVA5110J, the EPDM, the modified starch, the POE, the zinc oxide and the zinc stearate into an internal mixer for internal mixing for 6min, and keeping the environmental temperature at 110-120 ℃; secondary banburying: adding a foaming agent AC into an internal mixer for continuous internal mixing for 3 min; carrying out three-time banburying: adding a cross-linking agent into an internal mixer, and then continuously mixing for 3min to obtain a mixture; pulling the obtained mixture on an open mill, and carrying out die pressing and foaming on the mixture on a flat foaming machine by using a special template to obtain an intermediate layer elastic shoe material with proper thickness and structure; and (3) molding foaming conditions: the time is 6min, and the mould pressing temperature is 170 ℃; 3) preparing a protective layer, selecting high-toughness spinning threads subjected to slurrying, performing three-dimensional spinning, creating a three-dimensional cloth space, and simultaneously improving the thickness of the cloth and greatly enhancing the toughness; and cutting the selected anti-puncture cloth for forming for later use. 4) Sequentially placing the elastic layer, the protective layer and the contact layer on the base material prepared in the steps 1), 2) and 3) from bottom to top, gluing the layers, laminating the layers in order, and heating and compression molding to obtain the required product.

8. The preparation method of the rubber-plastic puncture-preventing multifunctional sole according to claim 7, characterized in that: in the step 4), heating a compression molding process, keeping the compression for 30s at the heating temperature of 170 ℃ and the compression pressure of 4-10 MPa, and removing the die and trimming to obtain the required product; the stearic acid and the modified starch in the step 1) are synchronously added into an internal mixer; in the step 2), adding a foaming agent AC into an internal mixer, wherein the internal mixing environment temperature is 120 ℃, and pulling the prepared mixture on a sheet of an open mill; and adding the pull piece into a template on a flat foaming machine, carrying out mould pressing foaming to obtain the middle-layer elastic shoe material with the thickness suitable for the requirement, and carrying out mould pressing foaming for 6min at the ambient temperature of 170 ℃ and under the pressure of 8 MPa.

9. The preparation method of the rubber-plastic puncture-preventing multifunctional sole according to claim 7, characterized in that: the modified starch is formed by grafting corn starch through vinyl acetate and contains ester groups capable of chemically crosslinking with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer, and the elastic layer of the composite material has better hygroscopicity, and the specific adsorbable amount accounts for 5% -8% of the dead weight.

10. The preparation method of the rubber-plastic puncture-preventing multifunctional sole according to claim 7, characterized in that: at least three uniformly distributed through holes are formed in the front and the back of the forming material of the puncture-proof layer.

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