阅读说明：本技术 一种透气耐磨的塑胶鞋底生产工艺 (Production process of breathable and wear-resistant plastic sole ) 是由 申乾成 申辉 黄振 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种透气耐磨的塑胶鞋底生产工艺,工艺如下：1)将金属锌、纳米铝、纳米镁以及明胶、海藻酸钠和蒸馏水搅拌制得浆料；2)将浆料干燥脱脂后压制成坯体,烧结后进行熔化,经雾化制粉得到纳米合金粉末；3)将合金粉末制成压坯,固定后在表面施加载荷,在低温下进行变温处理,将压坯粉碎后加入到肉桂酸的乙醇溶液中,加入三乙醇胺,搅拌后进行热处理,得到多孔纳米合金粉末；4)将多孔合金粉末、N,N-二甲基甲酰胺和聚丙烯腈制备的溶液倒入注射器中,经纺丝、粉碎后得到杂化纤维粉末；5)将原料混炼后经注塑机向模具中注料,压合、冷却、开模后即可获得所需塑胶鞋底。该塑胶鞋底兼顾防水和透气的效果,并且穿着舒适耐磨。(The invention discloses a production process of a breathable wear-resistant plastic sole, which comprises the following steps: 1) stirring metal zinc, nano aluminum, nano magnesium, gelatin, sodium alginate and distilled water to prepare slurry; 2) drying and degreasing the slurry, pressing the slurry into a green body, sintering the green body, melting the green body, and atomizing the sintered green body to prepare powder to obtain nano alloy powder; 3) preparing the alloy powder into a pressed compact, fixing the pressed compact, applying a load on the surface, carrying out temperature change treatment at low temperature, crushing the pressed compact, adding the crushed pressed compact into an ethanol solution of cinnamic acid, adding triethanolamine, stirring, and carrying out heat treatment to obtain porous nano-alloy powder; 4) pouring the solution prepared from the porous alloy powder, the N, N-dimethylformamide and the polyacrylonitrile into an injector, and spinning and crushing to obtain hybrid fiber powder; 5) mixing the raw materials, injecting the materials into a mold through an injection molding machine, pressing, cooling and opening the mold to obtain the required plastic sole. The plastic sole has waterproof and breathable effects, and is comfortable and wear-resistant.)

1. A production process of a breathable wear-resistant plastic sole is characterized by comprising the following steps:

1) injecting a certain amount of distilled water into a container, then mixing the metal zinc powder, the nano aluminum powder and the nano magnesium powder, adding into the container, adding the gelatin and the sodium alginate, and stirring at the rotation speed of 100-150r/min for 20-30min to obtain slurry;

2) freeze-drying the slurry in vacuum, then placing the slurry in a degreasing furnace, baking the slurry for 5-10min at the temperature of 230-;

3) pressing the alloy powder into a pressed blank by using a powder forming press, fixing the pressed blank in the middle by using a stainless steel plate, applying a certain load on the surface of the stainless steel plate, carrying out temperature change treatment at low temperature, adding the powder obtained by crushing the treated pressed blank into an ethanol solution of cinnamic acid, then adding a proper amount of triethanolamine, stirring and soaking at room temperature for 30-50min, carrying out heat treatment on the product at the temperature of 110-125 ℃ for 36-48h, cooling to room temperature, filtering, and drying the product to obtain porous nano-alloy powder;

4) adding porous alloy powder into N, N-dimethylformamide solution, carrying out dispersion treatment for 25-35min under 300-400W ultrasonic wave, then adding a proper amount of polyacrylonitrile, stirring for 4-5h at 50-60 ℃ to completely dissolve the polyacrylonitrile, pouring the prepared solution into an injector, fixing the injector on spinning equipment, carrying out gas flow spinning to obtain a hybrid fiber membrane, and crushing the hybrid fiber membrane by a crusher to obtain hybrid fiber powder;

5) adding the plastic material into an internal mixer, adding the hybrid fiber powder and the cross-linking agent, mixing for 15-25min to obtain a molten mixture, adding the plasticizer, the stabilizer, the lubricant, the silane coupling agent and the antioxidant, continuing mixing for 15-25min, injecting the obtained molten material into a sole mold through an injection molding machine, and after the injection is finished, performing pressing, cooling and mold opening to obtain the required plastic sole.

2. The production process of the pneumatic wear-resistant plastic sole as claimed in claim 1, wherein in the process step 1), the mass ratio of the metallic zinc powder, the nano aluminum powder and the nano magnesium powder is 45-55:10-15:8-13, wherein the particle size of the metallic zinc powder is 100-170 μm.

3. The process for manufacturing a pneumatic abrasion resistant plastic sole according to claim 1, wherein in process step 1), the relative solids content of said slurry is 52-58%; the dosage of the gelatin is 1-1.5% of the total weight of the metal powder, and the dosage of the sodium alginate is 0.5-0.8% of the total weight of the metal powder.

4. The process for producing a pneumatic abrasion-resistant plastic sole as claimed in claim 1, wherein in the process step 2), the vacuum degree of the vacuum tube furnace is 2 x 10^-3-2.8×10^-3Pa; in the atomization powder preparation, the atomization atmosphere is one or more of nitrogen, helium and argon, the atomization pressure is 5-10MPa, and the flowing speed of the metal liquid is 15-25 kg/min.

5. The process for producing a pneumatic abrasion resistant plastic sole as claimed in claim 1, wherein in process step 3), said green compact has a size of 40-50cm x 20-25cm x 1-1.5cm and a density of 4.5-5.5g/cm³(ii) a The load is 2.0-3.5kN, the temperature variation range is-80-0 ℃, and the treatment time is 2-3 h; in the reaction system, the mass volume ratio of the powder to the cinnamic acid, the absolute ethyl alcohol and the triethanolamine is 1.2-1.8 g: 2.0-2.7 g: 65-75 ml: 1g of a compound; the rotating speed of stirring and soaking is 80-150 r/min.

6. The manufacturing process of a pneumatic wear-resistant plastic sole as claimed in claim 1, wherein in the process step 4), the rotation speed of stirring and dissolving is 180-230 r/min; in the air flow spinning, the solution propelling speed is 10-20ml/h, the air flow pressure is 0.1-0.4MPa, the temperature is 50-65 ℃, and the relative humidity is 45-60%; the hybrid fiber powder is 30-50 um.

7. The process for producing a pneumatic abrasion resistant plastic sole according to claim 1, wherein in the step 5), the plastic material is one of polyvinyl chloride, polyethylene and polycarbonate; the cross-linking agent is one of dicumyl peroxide, di-tert-butyl peroxide and 2, 4-dichlorobenzoyl peroxide; the plasticizer is a titanate plasticizer; the stabilizer is a rare earth stabilizer; the lubricant is one of paraffin and stearate; the antioxidant is hindered phenol antioxidant; the weight ratio of the plastic material to the hybrid fiber powder to the cross-linking agent to the plasticizer to the stabilizer to the lubricant to the silane coupling agent to the antioxidant is 55-65: 8-13: 0.1-0.3: 6-10:2-3: 0.5-0.8: 1-1.5:0.03-0.1.

8. The manufacturing process of a pneumatic and wear-resistant plastic sole as claimed in claim 1, wherein in the step 5), the banburying temperature is 140-170 ℃; the injection molding temperature is 100-120 ℃, and the injection molding pressure is 60-80 MPa.

Technical Field

The invention belongs to the technical field of plastic processing, and particularly relates to a production process of a breathable and wear-resistant plastic sole.

Background

Plastics are mainly composed of carbon, oxygen, hydrogen, nitrogen and other organic or inorganic elements, and the finished product is a solid and molten liquid in the manufacturing process, so that the plastics can be heated to melt, pressurized to flow, cooled to solidify, and formed into various shapes. The plastic is mainly divided into thermoplastic plastic and thermosetting plastic, the thermoplastic plastic refers to plastic still having plasticity after repeated heating, and the plastic mainly comprises common raw materials such as PE/PP/PVC/ABS/PC/PA and the like; thermosetting plastics mainly refer to plastics made of synthetic resins hardened by heating, and are not commonly used like some phenolic plastics and amino plastics.

Compared with rubber soles, the plastic soles gradually enter the visual field of people due to the characteristics of light weight and easy forming, and the problem that the rubber soles are too heavy due to large density is avoided. However, the rain shoes made of plastic often have longer air permeability, and when the rain shoes are worn for a long time and operated in water, the rain shoes are not only uncomfortable to wear, but also the sweat caused by air impermeability is easy to breed bacteria, so that the foot odor is caused. Chinese patent CN2017109266659 discloses a production process of waterproof and breathable rain shoes, wherein in the process of blending and drawing, due to different stretching tendencies exhibited by butyl cyanide rubber and polyurethane resin, a micropore gap is formed at the contact interface of the butyl cyanide rubber and the polyurethane resin, so as to obtain rain shoe bodies which are both breathable and waterproof. Although the rain boot has certain air permeability and can improve the wearing comfort, the air permeable part of the rain boot is a shoe body, so the rain boot has poor foot improvement effect, and the problem that the foot is hot and easy to sweat during long-time wearing and particularly during underwater operation cannot be solved.

Disclosure of Invention

The invention aims to provide a production process of a breathable and wear-resistant plastic sole aiming at the existing problems.

The invention is realized by the following technical scheme:

a production process of a breathable wear-resistant plastic sole comprises the following specific process steps:

1) injecting a certain amount of distilled water into a container, then mixing the metal zinc powder, the nano aluminum powder and the nano magnesium powder with the particle size of 100-55: 10-15:8-13 according to the mass ratio of 45-55:10-15:8-13, then adding into the container, then adding gelatin with the weight of 1-1.5% of the total weight of the metal powder and sodium alginate with the weight of 0.5-0.8% of the total weight of the metal powder, and stirring for 20-30min at the rotation speed of 100-150r/min to obtain slurry with the relative solid content of 52-58%; according to the invention, gelatin is used as an adhesive, sodium alginate is used as a dispersing agent, and metal powder is prepared into slurry with moderate viscosity;

2) freeze drying the slurry in vacuum, baking at 230-270 deg.c for 5-10min, pressing the degreased blank and vacuum maintaining at 2X 10^-3-2.8×10^-3Heating to 240-300 ℃ at the speed of 5-8 ℃/min in a Pa vacuum tube furnace, carrying out heat preservation treatment for 20-30min, heating to 350-380 ℃ at the speed of 10-13 ℃/min, and carrying out heat preservation for 30-50 min; according to the invention, the dried and degreased green body is sintered in a tube furnace after being pressed, mechanical occlusion is generated among metal powder particles through pressing, so that a pressed compact formed by the pressed powder has larger elastic after-effect, and in the sintering process, because the bonding strength among the powder particles of the pressed compact is lower, a high-strength sintering neck cannot be formed among the powder particles in the pressed compact, so that more cracks and pores are formed on the surface of the metal powder particles in the sintered compact under the action of thermal stress; heating the sintered blank to 440-470 ℃, melting to obtain metal liquid, selecting one or more of nitrogen, helium and argon as an atomization atmosphere, adopting an atomization powder preparation process with the atomization air pressure of 5-10MPa and the metal liquid flow speed of 15-25kg/min to prepare powder, and crushing and grinding to obtain nano alloy powder; heating and melting the sintered blank, wherein the melting temperature is far lower than the melting points of metal aluminum and metal magnesium, so that the metal aluminum and the metal magnesium in the obtained metal liquid are granular, and pores are formed in the alloy powder and on the surface of the alloy powder;

3) pressing the alloy powder into 40-50cm × 20-25cm × 1-1.5cm with density of 4.5-5.5g/cm by powder forming press³Fixing the pressed blank in the middle of a stainless steel plate, applying a load of 2.0-3.5kN on the surface of the stainless steel plate, and carrying out temperature change treatment for 2-3h at the temperature change range of-80-0 ℃; according to the invention, the alloy powder is subjected to variable temperature treatment at low temperature under the condition of applying load after being pressed, and the temperature is slowly increased at low temperature, so that the pore tip opening texture formed in the alloy powder is increased along with the increase of the temperature, the pore tip plastic area is increased, and the pore opening displacement is increased, so that the pores which are not communicated originally in the alloy powder are gradually increased to form through holes, and thus the porous nano-alloy powder is obtained; applying a certain load when the green compact pressed by the alloy powder is subjected to temperature change treatment, and along with the increase of the load, improving the development degree of a pore tip plastic area, so that the expansion displacement of the pore tip is increased along with the increase of the temperature, and the formation of a through hole in the alloy powder is facilitated; then, according to the mass-to-volume ratio of 1.2-1.8 g: 2.0-2.7 g: 65-75 ml: 1g, adding the powder obtained by crushing the treated pressed blank into an ethanol solution of cinnamic acid, then adding a proper amount of triethanolamine, stirring and soaking at the room temperature at the stirring speed of 80-150r/min for 30-50min, carrying out heat treatment on the product at the temperature of 110-125 ℃ for 36-48h, cooling to the room temperature, filtering, and drying the product to obtain porous alloy powder; soaking the crushed alloy powder in an ethanol solution of cinnamic acid, wherein zinc in the alloy powder can be slowly oxidized by oxygen dissolved in the ethanol solution to form divalent zinc, and the generated zinc ions can perform a coordination reaction with the cinnamic acid to form a complex, so that an assembly film is formed on the surface of the alloy powder, and the stability of the alloy powder can be improved; the added triethanolamine can promote the formation of the complex and simultaneously enhance the thermal stability of the formed complex;

4) adding porous alloy powder into N, N-dimethylformamide solution, carrying out dispersion treatment for 25-35min under 300-400W ultrasonic wave, then adding a proper amount of polyacrylonitrile, stirring at the rotating speed of 180-230r/min at 50-60 ℃ for 4-5h to completely dissolve the polyacrylonitrile, pouring the prepared solution into an injector, fixing the injector on spinning equipment, carrying out air-flow spinning under the conditions that the solution advancing speed is 10-20ml/h, the air-flow pressure is 0.1-0.4MPa, the temperature is 50-65 ℃, and the relative humidity is 45-60% to obtain a hybrid fiber membrane, and crushing the hybrid fiber membrane by a crusher to obtain hybrid fiber powder of 30-50 um; the porous nano alloy powder is attached to the surface of the fiber, so that the roughness of the surface of the fiber is increased, the surface of the fiber presents a micro-nano rough structure, and the hydrophobicity of the hybrid fiber powder is improved;

5) adding 55-65 parts of polyvinyl chloride, polyethylene and polycarbonate as a plastic material into an internal mixer, adding 0.1-0.3 part of dicumyl peroxide, di-tert-butyl peroxide and one of 2, 4-dichlorobenzoyl peroxide as a cross-linking agent into the internal mixer together with 8-13 parts of hybrid fiber powder, mixing for 15-25min at the temperature of 140-, Cooling, and opening the mold to obtain the required plastic sole, wherein the lubricant is one of paraffin and stearate.

Compared with the prior art, the invention has the following advantages:

according to the plastic sole prepared by the invention, the metal zinc powder, the nano aluminum powder and the nano magnesium powder are used as raw materials, the alloy powder is obtained by vacuum sintering after pressing, then the alloy powder is subjected to temperature change treatment at low temperature after pressing, so that the opening displacement of pore tips in the alloy powder is increased, and pores in the alloy powder are increased to form through holes, so that the porous nano alloy powder is obtained, the porous nano alloy powder is attached to the surface of fibers, the wear resistance of the fibers is improved, the roughness of the surface of the fibers is increased, the hydrophobicity of the obtained hybrid fibers is improved while the gas permeability is good, the hybrid fibers have good air permeability and hydrophobicity, the waterproof and breathable effects of the plastic sole are facilitated, and the wearing comfort and wear resistance of the plastic shoes are improved.

Detailed Description

The present invention will be further described with reference to specific embodiments.