阅读说明：本技术 一种吸湿透气减震丙烯酸酯泡沫材料鞋垫及制备方法 (Moisture-absorbing, breathable and shock-absorbing acrylic ester foam material insole and preparation method thereof ) 是由 林艳芬 粱永江 张维军 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种吸湿透气减震丙烯酸酯泡沫材料鞋垫及制备方法,该鞋垫由以下重量份的原料制成：无纺布11-45份、丙烯酸脂类单体2-5份、乳化剂0.3-3份、引发剂0.2-2份和电解质溶液89-97.5份,制备方法包括制备油相和水相、乳化、加入引发剂、层叠、蒸汽固化、洗涤、烘干和冲模,本发明把无纺布和丙烯酸酯类聚合材料结合到一起形成复合高分子材料,开创性的运用无纺布混合丙烯酸酯固化技术,制作成鞋垫,在多层结构的作用下,鞋垫具有自身重量4倍以上吸水能力,纵向断裂强度在10N/25mm以上,横向断裂强度在4N/25mm以上,具有良好的透气性能和减震性能,极大改善了鞋子的穿着性能,提升消费者的舒适感。(The invention discloses a moisture-absorbing, breathable and shock-absorbing acrylic ester foam material insole and a preparation method thereof, wherein the insole is prepared from the following raw materials in parts by weight: 11-45 parts of non-woven fabric, 2-5 parts of acrylate monomer, 0.3-3 parts of emulsifier, 0.2-2 parts of initiator and 89-97.5 parts of electrolyte solution, wherein the preparation method comprises the steps of preparing oil phase and water phase, emulsifying, adding initiator, laminating, steam curing, washing, drying and punching.)

1. A moisture-absorbing breathable shock-absorbing acrylic ester foam material insole is characterized by being prepared from the following raw materials in parts by weight: 11-45 parts of non-woven fabric, 2-5 parts of acrylate monomer, 0.3-3 parts of emulsifier, 0.2-2 parts of initiator and 89-97.5 parts of electrolyte solution.

2. The polymeric material of claim 1, wherein the acrylate monomer comprises a backbone monomer and a crosslinking monomer, and the backbone monomer comprises two or more of methyl methacrylate, ethyl dimethacrylate, butyl methacrylate, isobutyl methacrylate, hexyl methacrylate, lauryl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, isooctyl methacrylate, n-decyl methacrylate, isodecyl methacrylate, tetradecyl methacrylate, octadecyl methacrylate, isooctyl acrylate, n-decyl acrylate, isodecyl acrylate, tetradecyl acrylate, and octadecyl acrylate; the crosslinking monomer is one or the combination of more than one of 1, 6-hexanediol diacrylate, 1, 4-butanediol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, 1, 12-dodecyl dimethacrylate, 1, 14-tetradecanediol dimethacrylate, ethylene glycol dimethacrylate and neopentyl triacrylate.

3. The insole according to claim 1, wherein the non-woven fabric is one or a combination of two of spun-bonded non-woven fabric, hot-air non-woven fabric and spunlace non-woven fabric in any proportion.

4. The insole of claim 1, wherein said emulsifier is a water-in-oil emulsifier having an HLB value of 3-6; the initiator is one of ammonium persulfate, sodium persulfate or potassium persulfate.

5. The insole of claim 1, wherein said electrolyte solution is a calcium chloride solution or a sodium chloride solution, said electrolyte solution having a concentration of 1-4%.

6. A method of making an insole according to any of claims 1 to 5, characterized by the steps of:

(1) preparing an oil phase: heating an oil phase mixing pot to 45-55 ℃, simultaneously putting the acrylic monomer and the emulsifier in parts by weight into the pot, and starting stirring at the stirring speed of 100-;

(2) and preparing a water phase: adding calcium chloride and water into a water phase mixing pot, starting stirring at the stirring speed of 30-50 revolutions per minute for 15-30 minutes until the calcium chloride and the water are fully dissolved to obtain a water phase for later use;

(3) and emulsification: transferring the water phase into a high-speed homogenizing emulsifying pot, heating to 75-80 ℃, starting stirring at the speed of 1100-1300 rpm, then dripping the oil phase into the high-speed homogenizing emulsifying pot through a flow injector, starting a homogenizing emulsifying machine after finishing feeding, wherein the rotation speed of a homogenizing head is 8000-10000 rpm, homogenizing and emulsifying for 5-10 minutes to form primary emulsion with the same grade of uniformly dispersed particles, then closing the homogenizing emulsifying machine, continuously stirring the primary emulsion, and keeping stirring for 20-30 minutes to obtain mixed emulsion;

(4) and adding an initiator: adding an initiator into the mixed emulsion to enable the emulsion to be subjected to cross-linking polymerization, and keeping stirring until a viscous polymerization emulsion is formed;

(5) and laminating: placing the first non-woven fabric on the bottom layer of a forming mould, adding the polymerized emulsion on the upper side of the first non-woven fabric, and then covering and placing the second non-woven fabric on the upper side of the first non-woven fabric to form a three-layer structure of the non-woven fabric clamping the polymerized emulsion; or placing the first non-woven fabric on the bottom layer of a forming mould, adding part of the polymerized emulsion on the upper side of the first non-woven fabric, covering the second non-woven fabric on the upper side of the first non-woven fabric, adding the polymerized emulsion again on the upper side of the second non-woven fabric, and covering the third non-woven fabric to form a structure of clamping the two layers of polymerized emulsion by the three layers of non-woven fabrics, thereby preparing the original material of the insole;

(6) and (3) steam curing: placing the raw material into a steam pot, and forming a non-woven mixed curing material through steam curing, wherein the steam temperature is 100-120 ℃, and the curing time is 5-20 minutes;

(7) and washing: washing the material after steam curing, firstly washing with deionized water mixed with a surfactant solution, and then washing with deionized water to remove residual monomers;

(8) and drying: transferring the washed material to a negative pressure high temperature drying pot for drying and dehydration for 2-4 hours;

(9) and stamping: and (4) carrying out die punching on the dried material to manufacture the insole.

Technical Field

The invention relates to an insole, in particular to an insole made of acrylic ester foam material and a preparation method thereof.

Background

With the development of economy and the improvement of living standard, the frequency of activities such as business trip, sports, tourism and the like is higher and higher. People hope to continuously improve the requirements of comfort, air permeability, wear resistance and the like of the shoes, and the insoles are used as the bearing bodies of the weight of human bodies and play an important role in the wearing performance of the shoes.

The common shoe pad, EVA shoe pad, has good supporting force and elasticity, and is often used in sports shoes. However, EVA is not breathable, so that feet sweat, and after long-time sporters wear the shoes, the feet have obvious foot odor. TPR insoles have cushioning properties but are also air impermeable as EVA. Latex insoles are breathable, but have poor abrasion resistance and are prone to cracking. The genuine leather insole is breathable, but is relatively hard, lacks the shock absorption performance and is easy to gather the smell. The textile cloth type insole has certain hygroscopicity and air permeability, but is easy to deform and lacks the damping effect. In the market, a shoe pad is also provided, wherein non-woven fabrics and wood pulp are bonded together by hot melt adhesive, and water-absorbing SAP is put in the shoe pad, so that the shoe pad has good moisture absorption capacity, is easy to deform and weak in shock absorption, and the granular SAP in the shoe pad is easy to separate out and pollute the human body to have negative effects on physical and psychological health.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a moisture-absorbing, breathable and shock-absorbing acrylic ester foam material insole and a preparation method thereof.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a moisture-absorbing breathable shock-absorbing acrylic ester foam material insole is prepared from the following raw materials in parts by weight: 11-45 parts of non-woven fabric, 2-5 parts of acrylate monomer, 0.3-3 parts of emulsifier, 0.2-2 parts of initiator and 89-97.5 parts of electrolyte solution.

The acrylate monomer consists of a skeleton monomer and a crosslinking monomer, wherein the skeleton monomer is a combination of two or more than two of methyl methacrylate, ethyl dimethacrylate, butyl methacrylate, isobutyl methacrylate, hexyl methacrylate, lauryl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate, isooctyl methacrylate, n-decyl methacrylate, isodecyl methacrylate, tetradecyl methacrylate, octadecyl methacrylate, isooctyl acrylate, n-decyl acrylate, isodecyl acrylate, tetradecyl acrylate and octadecyl acrylate; the crosslinking monomer is one or the combination of more than one of 1, 6-hexanediol diacrylate, 1, 4-butanediol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, 1, 12-dodecyl dimethacrylate, 1, 14-tetradecanediol dimethacrylate, ethylene glycol dimethacrylate and neopentyl triacrylate.

The non-woven fabric is one or a composition of two of spun-bonded non-woven fabric, hot-air non-woven fabric and spunlace non-woven fabric in any proportion.

The emulsifier is a water-in-oil emulsifier with HLB value of 3-6; the initiator is one of ammonium persulfate, sodium persulfate or potassium persulfate.

The electrolyte solution is calcium chloride solution or sodium chloride solution, and the concentration of the electrolyte solution is 1-4%.

A method for preparing the insole comprises the following steps:

(1) preparing an oil phase: heating the oil phase mixing pot to 45-55 ℃, simultaneously putting the acrylic monomer and the emulsifier in parts by weight into the pot, and starting stirring at the stirring speed of 100-.

(2) And preparing a water phase: adding calcium chloride and water into the water phase mixing pot, starting stirring at the stirring speed of 30-50 r/min for 15-30 min until the calcium chloride and the water are fully dissolved to obtain a water phase for later use.

(3) And emulsification: transferring the water phase into a high-speed homogenizing emulsifying pot, heating to 75-80 ℃, starting stirring at the speed of 1100-1300 rpm, then dripping the oil phase into the high-speed homogenizing emulsifying pot through a flow injector, starting a homogenizing emulsifying machine after the material feeding is finished, enabling the rotation speed of a homogenizing head to be 8000-10000 rpm, homogenizing and emulsifying for 5-10 minutes to form primary emulsion with the same grade of uniformly dispersed particles, then closing the homogenizing emulsifying machine, continuously stirring the primary emulsion, and keeping stirring for 20-30 minutes to obtain mixed emulsion.

(4) And adding an initiator: and adding an initiator into the mixed emulsion to enable the emulsion to be subjected to cross-linking polymerization, and keeping stirring until a viscous polymerization emulsion is formed.

(5) And laminating: placing the first non-woven fabric on the bottom layer of a forming mould, adding the polymerized emulsion on the upper side of the first non-woven fabric, and then covering and placing the second non-woven fabric on the upper side of the first non-woven fabric to form a three-layer structure of the non-woven fabric clamping the polymerized emulsion; or placing the first non-woven fabric on the bottom layer of a forming mould, adding part of the polymerized emulsion on the upper side of the first non-woven fabric, covering the second non-woven fabric on the upper side of the first non-woven fabric, adding the polymerized emulsion again on the upper side of the second non-woven fabric, and covering the third non-woven fabric to form a structure of clamping the two layers of polymerized emulsion by the three layers of non-woven fabrics, thereby preparing the original material of the insole.

(6) And (3) steam curing: the raw material is put into a steam pot and is cured by steam to form a non-woven mixed curing material, the steam temperature is 100-120 ℃, and the curing time is 5-20 minutes.

(7) And washing: and (3) washing the material after steam curing, firstly washing the material by using deionized water mixed with a surfactant solution, and then washing the material by using deionized water to remove residual monomers.

(8) And drying: and transferring the washed material to a negative pressure high temperature drying pot for drying and dehydration for 2-4 hours.

(9) And stamping: and (4) carrying out die punching on the dried material to manufacture the insole.

The invention has the beneficial effects that: according to the invention, the non-woven fabric and the acrylate polymer material are combined together to form the composite polymer material, the non-woven fabric mixed acrylate curing technology is creatively applied to manufacture the insole, under the action of a multilayer structure, the insole has the water absorption capacity of more than 4 times of the self weight, the longitudinal breaking strength is more than 10N/25mm, the insole has good air permeability and shock absorption performance, the wearing performance of the shoe is greatly improved, and the comfort of consumers is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic process flow diagram of the present invention.

Detailed Description

In the present example, the temperature and pressure are not particularly emphasized, and they are both normal temperature and normal pressure.

Referring to fig. 1, a moisture-absorbing, breathable and shock-absorbing acrylic ester foam material insole is prepared from the following raw materials in parts by weight: 11-45 parts of non-woven fabric, 2-5 parts of acrylate monomer, 0.3-3 parts of emulsifier, 0.2-2 parts of initiator and 89-97.5 parts of electrolyte solution. According to the invention, the non-woven fabric and the acrylate polymer material are combined together to form the composite polymer material, the non-woven fabric mixed acrylate curing technology is creatively applied to manufacture the insole, under the action of a multilayer structure, the insole has the water absorption capacity of more than 4 times of the self weight, the longitudinal breaking strength is more than 10N/25mm, the insole has good air permeability and shock absorption performance, the wearing performance of the shoe is greatly improved, and the comfort of consumers is improved.

The acrylate monomer consists of a skeleton monomer and a crosslinking monomer, wherein the skeleton monomer is methyl methacrylate (chemical formula is C)₅H₈O₂) Ethyl methacrylate (chemical formula C)₆H₁₀O₂) Ethyl dimethacrylate (chemical formula)Is C₇H₁₂O₂) Butyl methacrylate (chemical formula C)₈H₁₄O₂) Isobutyl methacrylate (chemical formula C)₈H₁₄O₂) Hexyl methacrylate (chemical formula C)₁₀H₁₈O₂) Lauryl methacrylate (chemical formula C)₁₆H₃₀O₂) Isobornyl methacrylate (chemical formula C)₁₄H₂₂O₂) Cyclohexyl methacrylate (chemical formula is C)₁₀H₁₆O₂) Isooctyl methacrylate (chemical formula C)₁₂H₂₂O₂) N-decyl methacrylate (chemical formula C)₁₄H₂₆O₂) Isodecyl methacrylate (chemical formula C)₁₄H₂₆O₂) Tetradecyl methacrylate (chemical formula C)₁₈H₃₄O₂) Octadecyl methacrylate (chemical formula C)₂₂H₄₃O₂) Isooctyl acrylate (chemical formula is C)₁₁H₂₀O₂) N-decyl acrylate (chemical formula C)₁₃H₂₄O₂) Isodecyl acrylate (chemical formula C)₁₃H₂₄O₂) Tetradecyl acrylate (chemical formula C)₁₇H₃₂O₂) And octadecyl acrylate (formula C)₂₁H₄₀O₂) Two or a combination of two or more of (a); the crosslinking monomer is 1, 6-hexanediol diacrylate (chemical formula is C)₁₂H₁₈O₄)1, 4-butanediol dimethacrylate (chemical formula C)₁₂H₁₈O₄) Trimethylolpropane triacrylate (chemical formula is C)₁₅H₂₀O₆) Trimethylolpropane trimethacrylate (chemical formula C)₁₈H₂₆O₆)1, 12-dodecyl dimethacrylate (chemical formula C)₂₀H₃₄O₄)1, 14-tetradecanediol dimethacrylate (chemical formula C)₂₂H₃₈O₄) Ethylene glycol dimethacrylate (molecular formula C)₁₀H₁₄O₄) And triacrylateNeopentyl ester (chemical formula C)₈H₁₄O₂) One or a combination of more than one of them. The skeleton monomer accounts for 50-80% of the total amount of the acrylate monomer; the crosslinking monomer accounts for 20-50% of the total amount of the acrylate monomer.

The weight of each square meter of the non-woven fabric is 13g-35g, the relative mass ratio accounts for 11% -35%, the used non-woven fabric is one or two of spun-bonded non-woven fabric, hot air non-woven fabric, spunlace non-woven fabric and the like, the combination can be multiple, the combination can be freely adjusted according to actual requirements, the weight of each square meter of the final material is 350g-750g, the weight of each square meter of the non-woven fabric is 18g-40g, and the relative mass ratio accounts for 11% -45%.

The emulsifier is a water-in-oil emulsifier with HLB value of 3-6, and the emulsifier used in this example is diglycerol isostearate (73296-86-2 dispersant manufactured by Wuhan eosin Biotech, Inc.); the initiator is ammonium persulfate (chemical formula is (NH)₄)₂S₂O₈) Sodium persulfate (chemical formula is Na)₂S₂O₈) Or potassium persulfate (molecular formula is K)₂S₂O₈) One kind of (1).

The electrolyte solution is calcium chloride (chemical formula is CaCl)₂) The electrolyte solution or sodium chloride (chemical formula is NaCl) solution, the concentration of the electrolyte solution is 2-4%, and the solvent adopts distilled water or purified water.

A method for preparing the insole comprises the following steps:

(1) preparing an oil phase: heating the oil phase mixing pot to 45-55 ℃, simultaneously putting the acrylic monomer and the emulsifier in parts by weight into the pot, and starting stirring at the stirring speed of 100-.

(2) Preparation of aqueous phase (preparation of electrolyte aqueous solution): adding salt (calcium chloride is adopted in the embodiment) and water into a water phase mixing pot, preparing a 3% salt (calcium chloride) solution, starting stirring at the stirring speed of 30-50 r/min for 15-30 min until the salt is fully dissolved to obtain a water phase for later use.

(3) And emulsification: transferring the water phase into a high-speed homogenizing emulsifying pot, heating to 75-80 ℃, starting stirring at the stirring speed of 1100-1300 revolutions per minute, then automatically dripping the oil phase into the high-speed homogenizing emulsifying pot through a flow injector, finishing dripping within 20-30 minutes according to the volume of the oil phase, starting a homogenizing emulsifying machine after finishing feeding, forming primary emulsion with the same grade of uniformly dispersed particles at the homogenizing head rotation speed of 8000-10000 revolutions per minute, homogenizing and emulsifying for 5-10 minutes, then closing the homogenizing emulsifying machine, continuously stirring the primary emulsion, and keeping stirring for 20-30 minutes to obtain mixed emulsion.

(4) And adding an initiator: and adding an initiator into the mixed emulsion to enable the emulsion to be subjected to cross-linking polymerization, and keeping stirring until a viscous polymerization emulsion is formed.

(5) And laminating: placing the first non-woven fabric on the bottom layer of a forming mould, adding the polymerized emulsion on the upper side of the first non-woven fabric, and then covering and placing the second non-woven fabric on the upper side of the first non-woven fabric to form a three-layer structure of the non-woven fabric clamping the polymerized emulsion; or placing the first non-woven fabric on the bottom layer of a forming mould, adding part of the polymerized emulsion on the upper side of the first non-woven fabric, covering the second non-woven fabric on the upper side of the first non-woven fabric, adding the polymerized emulsion again on the upper side of the second non-woven fabric, and covering the third non-woven fabric to form a structure of clamping the two layers of polymerized emulsion by the three layers of non-woven fabrics, thereby preparing the original material of the insole.

(6) And (3) steam curing: the raw material is put into a steam pot and is cured by steam to form the non-woven mixed curing material, the steam temperature is 100 ℃ and 120 ℃ (more than 100 ℃), and the curing time is 5-20 minutes.

(7) And washing: and (3) washing the material after steam curing, washing with a deionized water mixed surfactant solution, and then washing with deionized water to remove residual monomers until the content of the residual monomers meets the acceptance standard.

(8) And drying: and transferring the washed material into a negative pressure high temperature drying pot for drying and dehydrating for 2-4 hours (more than 2 hours) until the water content meets the acceptance standard, and setting the negative pressure value and the temperature according to the rules of instruments, wherein no special requirement exists.

(9) And stamping: and (4) carrying out die punching on the dried material to manufacture the insole.

The insole is prepared by creatively applying a non-woven fabric mixed acrylate curing technology on the preparation method, and under the action of a multilayer structure, the insole has the water absorption capacity of more than 4 times of the self weight, the longitudinal breaking strength of more than 10N/25mm, good air permeability and shock absorption performance, the wearing performance of the shoe is greatly improved, and the comfort of consumers is improved.

Specific example 1: 3.2kg of acrylate monomer (wherein 1.2kg of isooctyl acrylate, 0.8kg of 1, 4-butanediol dimethacrylate, 0.7kg of isooctyl methacrylate and 0.5kg of 1, 6-hexanediol diacrylate); 0.5kg of diglycerol isostearate (emulsifier); ammonium persulfate (initiator) 0.3 kg; 96kg of electrolyte salt aqueous solution (3% calcium chloride solution); the nonwoven fabric used was a 25gsm hot air nonwoven fabric as the first nonwoven fabric, and a 20gsm spunbond nonwoven fabric as the second nonwoven fabric (the top and bottom layers were nonwoven fabrics, and the middle layer was an acrylic polymer emulsion).

The process comprises the following steps:

1) preparation of oil and aqueous phases:

preparing an oil phase: heating the oil phase mixing pot to 45-55 ℃, putting the weighed acrylate monomer and the emulsifier into the pot, starting stirring at the stirring speed of 100-.

Preparing an aqueous phase: and (3) preparing 96kg of 3% calcium chloride solution in a water phase mixing pot, stirring at the speed of 30-50 r/min for 15-30 min until the calcium chloride solution is fully dissolved for later use.

2) Transferring the water phase into a high-speed homogenizing emulsifying pot, heating to 75-80 ℃, starting high-speed stirring at the rotating speed of 1300 revolutions per minute of 1100 plus materials, then gradually dripping the oil phase into the water phase, starting a homogenizing emulsifying machine after the feeding is finished, keeping the homogenizing emulsification for 5-10 minutes at the rotating speed of 10000 plus materials of 8000 plus materials per minute to form primary emulsion with the same grade of uniformly dispersed particles, then closing the homogenizing, starting high-speed stirring at the rotating speed of 1300 plus materials per minute of 1100 plus materials, and continuously keeping the stirring for 20-30 minutes.

3) Adding an initiator into the mixed emulsion in the emulsifying pot to enable the emulsion to be cross-linked and polymerized, and keeping stirring until a viscous polymerized emulsion is formed.

4) The first non-woven fabric is placed on the bottom layer of a forming die, then the polymerized emulsion is added on the upper side of the first non-woven fabric, and then the second non-woven fabric is placed on the upper side of the first non-woven fabric, so that a three-layer structure with the polymerized emulsion clamped by the non-woven fabrics is formed.

5) And (3) putting a forming die of the non-woven fabric superposed polymerized emulsion into a steam pot, and curing by steam to form a non-woven fabric mixed cured material, wherein the steam temperature is more than 100 ℃, and the curing time is 5-20 minutes.

6) After curing, the material is washed until the residual monomer content meets the acceptance criteria.

7) Transferring the solidified and washed polymer into a negative pressure high temperature drying pot for drying and dehydration. And drying for more than 2 hours until the moisture content meets the acceptance standard.

8) The material is punched to form the insole.

The results of the main performance tests on the insole obtained in example 1 were as follows:

specific example 2: 5kg of acrylate monomer (wherein, 2.6kg of n-decyl acrylate, 1.5kg of ethylene glycol dimethacrylate, 0.8kg of n-decyl methacrylate and 0.7kg of 1, 6-hexanediol diacrylate); 1kg of diglycerol isostearate (emulsifier); ammonium persulfate (initiator) 0.4 kg; 93kg of electrolyte salt aqueous solution (3% calcium chloride solution); the first nonwoven fabric of the bottom layer uses 25gsm hot air non-woven fabric, the second nonwoven fabric of the middle layer uses 18gsm spunbonded non-woven fabric, the third nonwoven fabric of the upper layer uses 21gsm spunbonded non-woven fabric (five-layer structure, namely, the uppermost layer, the middle layer and the bottom layer are non-woven fabrics, and acrylate polymerization emulsion is arranged between the adjacent non-woven fabrics).

The process comprises the following steps:

1) preparation of oil and aqueous phases:

preparing an oil phase: heating the oil phase mixing pot to 45-55 ℃, putting the weighed acrylate monomer and the emulsifier into the pot, starting stirring at the stirring speed of 100-.

Preparing an aqueous phase: and (3) preparing 96kg of 3% calcium chloride solution in a water phase mixing pot, wherein the stirring speed is 30-50 r/min, and the stirring time is 15-30 min until the calcium chloride solution is fully dissolved for later use.

2) Transferring the water phase into a high-speed homogenizing emulsifying pot, heating to 75-80 ℃, starting high-speed stirring at the stirring speed of 1100-1300 rpm, gradually dropping the oil phase, starting a homogenizing emulsifying machine after finishing the material addition, keeping the homogenizing emulsification for 5-10 minutes at the homogenizing head rotation speed of 8000-10000 rpm to form primary emulsion with the same grade of uniformly dispersed particles, then closing the homogenization, starting high-speed stirring at the stirring speed of 1100-1300 rpm, and continuously keeping the stirring for 20-30 minutes.

3) Adding an initiator into the mixed emulsion in the emulsifying pot to enable the emulsion to be cross-linked and polymerized, and keeping stirring until a viscous polymerized emulsion is formed.

4) The first non-woven fabric is placed on the bottom layer of a forming mould, then partial polymerization emulsion is added on the upper side of the first non-woven fabric, then a second non-woven fabric is placed on the upper side of the first non-woven fabric, then polymerization emulsion is added on the upper side of the second non-woven fabric, and finally a third non-woven fabric is placed on the uppermost side of the second non-woven fabric, so that a five-layer structure is formed.

5) And putting the forming die of the non-woven fabric superposed polymerized emulsion into a steam pot, and curing by steam to form the non-woven fabric mixed curing material. The steam temperature is above 100 ℃, and the curing time is 5-20 minutes.

6) After curing, the material is washed until the residual monomer content meets the acceptance criteria.

7) Transferring the solidified and washed polymer into a negative pressure high temperature drying pot for drying and dehydration. And drying for more than 2 hours until the moisture content meets the acceptance standard.

8) The material is punched to form the insole.

The results of the main performance tests on the material obtained in example 2 are as follows:

in conclusion, the two groups of result data show that compared with the prior art, the invention has the advantages that the longitudinal rupture strength is more than 10N/25mm, the transverse rupture strength is more than 4N/25mm, the water absorption times are more than 4 times of the self weight, the shock absorption capacity is good, the elastic recovery rate is more than 95%, the air permeability is more than 1500ml/min, and the air permeability is good.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.