High permeability PVC artificial leather and application thereof

Abstract

The application discloses high-permeability PVC artificial leather and application thereof, and belongs to the field of PVC artificial leather technology. The high-permeability PVC artificial leather comprises the following components: polyvinyl chloride, tetraethylene pentamine, modified polyvinyl chloride, self-made adhesive, soybean protein, natural resin, vegetable oil, vinyl acetate-ethylene copolymer emulsion, plasticizer, stabilizer and foaming agent. The polyvinyl chloride molecule treated by chlorination improves the heat distortion temperature and the solubility of the material, and also has good adhesion. The chlorinated polyvinyl chloride is modified by tetraethylene pentamine, so that the tensile strength of the material is maximally enhanced. The self-made adhesive utilizes the vinyl acetate-ethylene copolymer emulsion and the modified natural resin, the modified vegetable oil and the modified soybean protein, so that the peeling strength of the PVC artificial leather is improved. When the artificial leather is prepared, the calendering film formation and the foaming treatment are simultaneously performed on two sides, the foaming treatment provides more pressure for the calendering film formation, so that the material is combined with the cloth base more closely, and the foaming time is shortened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of PVC artificial leather, in particular to a high-permeability PVC artificial leather and application thereof. BACKGROUND

[0002] With the continuous progress and development of PVC production and processing technology, PVC artificial leather not only has greatly improved in quality, but also has an increasing variety of colors. PVC artificial leather with high permeability is very popular, but excessive pursuit of higher permeability will affect other properties of PVC artificial leather, such as tensile strength, peel strength, cold resistance, and high temperature resistance.

[0003] Therefore, it is necessary to optimize the performance of high-permeability PVC artificial leather to improve the performance without affecting the permeability, which has a good development prospect. Therefore, it is necessary to prepare a high-permeability PVC artificial leather with high tensile strength and peel strength. SUMMARY

[0004] The present application aims to provide a high-permeability PVC artificial leather to solve the problems in the background art.

[0005] To solve the above technical problems, the present application provides the following technical solution in the first aspect: a high-permeability PVC artificial leather, characterized in that it comprises the following raw materials in parts by weight:

[0006] 20-40 parts of polyvinyl chloride, 5-10 parts of tetraethylene pentamine, 10-15 parts of modified polyvinyl chloride, 5-10 parts of self-made adhesive, 5-10 parts of soybean protein, 5-10 parts of natural resin, 2-5 parts of vegetable oil, 10-15 parts of vinyl acetate-ethylene copolymer emulsion, 2-5 parts of plasticizer, 2-5 parts of stabilizer, and 2-5 parts of foaming agent.

[0007] Preferably, the modified polyvinyl chloride is prepared by first chlorinating polyvinyl chloride and then modifying it with tetraethylene pentamine. The irregularity of the molecular arrangement of the chlorinated polyvinyl chloride increases, the polarity increases, the chemical stability increases, the heat distortion temperature and the solubility of the material are improved, and the material also has good adhesion. Tetraethylene pentamine is used to modify the chlorinated polyvinyl chloride. Tetraethylene pentamine can react with active chlorine to form ionic crosslinking bonds grafted on the polyvinyl chloride molecular chain. The active chlorine content of the chlorinated polyvinyl chloride increases, allowing more tetraethylene pentamine to react with the polyvinyl chloride, thereby maximizing the tensile strength of the material.

[0008] Preferably, the self-made adhesive is prepared by using 2-sulfanyl ethanol solution of soybean protein as solvent, blending modified natural resin with vinyl acetate-ethylene copolymer emulsion in the solution, and adding modified vegetable oil.

[0009] The second aspect of the present application provides a preparation method of high permeability PVC artificial leather, and the process flow is as follows:

[0010] (1) The polyvinyl chloride resin in a dry state is put into a reaction kettle under normal pressure to directly perform chlorination reaction, the mixed gas for the reaction contains 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen, and the chlorinated polyvinyl chloride is obtained after 100 minutes of reaction;

[0011] (2) After the chlorinated polyvinyl chloride is added with a heat stabilizer and a fixed plasticizer, tetraethylenepentamine is added, the molar ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8:1, the mixture is sealed in a high-speed mixer and heated to mix, and the modified polyvinyl chloride is obtained;

[0012] (3) The natural resin and water are added into a flask provided with a thermometer, a stirrer and a condenser tube, the volume ratio is 1:4, sodium hydroxide is added dropwise to adjust the pH to 6-7, the temperature is increased to 90-95℃, and the modified natural resin is prepared after 2 hours of reaction;

[0013] (4) The vegetable oil and maleic anhydride are added into a flask provided with a thermometer, a stirrer and a condenser tube, hydrogen peroxide is used as a catalyst, the mixture is heated to 190-200℃ in a glycerol bath to perform reaction, then the mixture is cooled to 80℃ by using cold water, and sodium hydroxide is added dropwise to obtain the modified vegetable oil;

[0014] (5) The soybean protein is added into 2-sulfanyl ethanol solution, the modified natural resin, the modified vegetable oil and the vinyl acetate-ethylene copolymer emulsion are sequentially added to blend, the volume ratio is 1:1:5, and the self-made adhesive is prepared;

[0015] (6) The modified polyvinyl chloride is mixed with the plasticizer and the stabilizer at a weight ratio of 10:1:1, high-speed stirring is performed, a part of the material is used to prepare the first side of the double-layer PVC artificial leather, another part of the material is used to prepare the second side of the double-layer PVC artificial leather, the self-made adhesive is applied to the base fabric before the base fabric is compounded by using a compound machine, then the base fabric is simultaneously subjected to calendering film forming by using a calender and foaming by using a foaming oven, and finally the finished product is prepared by using a cooling roller to cool and an automatic winding machine to wind.

[0016] Preferably, in the step (6), the self-made adhesive is applied to the base fabric before the base fabric is compounded by using a compound machine.

[0017] (a) The first surface preparation process of the double-layer PVC artificial leather: material mixing, initial plasticizing in the internal mixer, plasticizing in the open mill, filtering in the filter machine, compounding with the cloth base in the compounder, film forming in the calender;

[0018] (b) The second surface preparation process of the double-layer PVC artificial leather: material mixing, initial plasticizing in the internal mixer, plasticizing in the open mill, filtering in the filter machine, compounding with the cloth base in the compounder, foaming in the foaming oven;

[0019] (c) Cooling in the cooling roll and winding in the automatic winding machine.

[0020] Preferably, the foaming agent is added when the initial plasticizing in the second surface preparation process of step (b) is completed.

[0021] Preferably, the plasticizing in step (b) is performed with multiple turning and accompanied by 2-3 times of large turning.

[0022] Preferably, the film forming and foaming of the double-layer PVC artificial leather in step (b) are performed simultaneously.

[0023] Preferably, the temperature of the calender when compounding with the cloth base in the first surface preparation process of step (a) is 150-160℃, the linear speed of the roll is 26-30m / min, the linear speed of the laminating roll is 40m / min, and the laminating roll pressure is 2.0-3.0MPa.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The modified PVC is prepared by chlorinating the PVC and then modifying it with tetraethylenepentamine. The irregularity of the molecular arrangement of the chlorinated PVC is increased, the polarity and the chemical stability are increased, the heat distortion temperature and the solubility of the material are improved, and the PVC also has good adhesion. The chlorinated PVC is modified with tetraethylenepentamine, which can react with active chlorine to form ionic crosslinking bonds grafted on the PVC molecular chain. The content of active chlorine in the chlorinated PVC is increased, so that more tetraethylenepentamine reacts with the PVC to maximize the tensile strength of the material. Through the treatment of the PVC, the tensile strength is enhanced, and part of the properties of the PVC are also optimized.

[0026] In the preparation of artificial leather, a self-made adhesive is used; a 2-sulfido ethanol solution of soybean protein is used as a solvent, the modified natural resin is blended with the vinyl acetate-ethylene copolymer emulsion in the solution, and the modified vegetable oil is added; the 2-sulfido ethanol can modify the soybean protein, open the disulfide bond existing in the protein, expose more functional groups, increase the bond connection required for the construction of the membrane network structure, and thus improve the mechanical properties of the soybean protein; with the increase of the hydrophobic group, the surface hydrophobicity is improved, and the overall water resistance is increased; the blending of the modified natural resin and the vinyl acetate-ethylene copolymer emulsion increases the particle size and flow of the blended glue particles, reduces the viscosity of the blended solution, and improves the peel strength of the blended solution; the compatibility of the vegetable oil and the vinyl acetate-ethylene copolymer emulsion is poor, but the compatibility of the modified vegetable oil and the vinyl acetate-ethylene copolymer emulsion of the modified natural resin is good, which increases the hydrophobicity and peel strength; in the preparation of artificial leather, the adsorption of polyvinyl chloride to protein also increases the peel strength.

[0027] A double-layer PVC artificial leather is prepared by using a calendering compounding method, one side of the cloth base is calendered and compounded, the raw materials are mixed and primary plasticized, plasticized, and filtered, and then calendered into a film on a calendering machine to be compounded with the cloth base, the other side of the cloth base is subjected to a foaming process, the raw materials are mixed and primary plasticized, and a foaming agent is added when the primary plasticization is completed, the foaming agent and other additives are uniformly dispersed by turning over multiple times during plasticization and accompanied by 2-3 times of large turning, and then filtered and subjected to foaming treatment in a foaming oven, the calendering and foaming of the two sides are carried out simultaneously, the foaming treatment provides more pressure to the calendering to make the material and the cloth base more closely combined, and also shortens the foaming time, and finally a cooling and winding is carried out to obtain the artificial leather product; such PVC artificial leather has excellent permeability, and the double-layer structure avoids the poor cold resistance after single foaming treatment, and increases the application range of the PVC artificial leather. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] A high-permeability PVC artificial leather, characterized in that it comprises the following raw materials in parts by weight:

[0030] 20-40 parts of polyvinyl chloride, 5-10 parts of tetraethylene pentamine, 10-15 parts of modified polyvinyl chloride, 5-10 parts of self-made adhesive, 5-10 parts of soybean protein, 5-10 parts of natural resin, 2-5 parts of vegetable oil, 10-15 parts of vinyl acetate-ethylene copolymer emulsion, 2-5 parts of plasticizer, 2-5 parts of stabilizer, and 2-5 parts of foaming agent.

[0031] Preferably, the modified polyvinyl chloride is prepared by chlorinating polyvinyl chloride and then modifying it with tetraethylene pentamine. The irregularity of the molecular arrangement of the chlorinated polyvinyl chloride is increased, the polarity is increased, the chemical stability is increased, the heat distortion temperature and the solubility of the material are improved, and the adhesion is also good. The chlorinated polyvinyl chloride is modified with tetraethylene pentamine, which can react with active chlorine to form ionic crosslinking bonds grafted on the polyvinyl chloride molecular chain. The content of active chlorine in the chlorinated polyvinyl chloride is increased, so that more tetraethylene pentamine reacts with the polyvinyl chloride, thereby maximizing the tensile strength of the material.

[0032] Preferably, the self-made adhesive is prepared by using a 2-sulfidoethanol solution of soybean protein as a solvent, blending modified natural resin and vinyl acetate-ethylene copolymer emulsion in the solution, and then adding modified vegetable oil. The self-made adhesive uses the vinyl acetate-ethylene copolymer emulsion together with the modified natural resin, modified vegetable oil, and modified soybean protein to improve the peel strength of the PVC artificial leather.

[0033] The second aspect of the present application provides a preparation method of high-permeability PVC artificial leather, and the process flow is as follows:

[0034] (1) The polyvinyl chloride resin is placed in a dry state in a reaction kettle under normal pressure, and a chlorination reaction is directly carried out. The mixed gas for the reaction contains 50% chlorine, 0.75% fluorine, and 49.25% nitrogen. After 100 minutes of reaction, chlorinated polyvinyl chloride is obtained.

[0035] (2) After adding heat stabilizer and fixed plasticizer to the chlorinated polyvinyl chloride, tetraethylene pentamine is added for mixing. The molar ratio of chlorinated polyvinyl chloride to tetraethylene pentamine is 8:1. The mixture is sealed in a high-speed mixer and heated for mixing to obtain modified polyvinyl chloride.

[0036] (3) In a flask equipped with a thermometer, a stirrer, and a condenser tube, natural resin and water are added in a volume ratio of 1:4. Sodium hydroxide is added dropwise to adjust the pH to 6-7. The temperature is raised to 90-95°C, and the reaction is carried out for 2 hours to obtain modified natural resin.

[0037] (4) In the flask equipped with thermometer, stirrer and condenser, add vegetable oil and maleic anhydride, hydrogen peroxide as catalyst, heated to 190-200℃ in glycerol bath to react, then cooled to 80℃ with cold water, drop in sodium hydroxide to obtain modified vegetable oil;

[0038] (5) Add soybean protein into 2-sulfhydryl ethanol solution, add modified natural resin, modified vegetable oil, vinyl acetate-ethylene copolymer emulsion in turn for blending, volume ratio 1:1:5, to prepare self-made adhesive;

[0039] (6) Mix modified polyvinyl chloride with plasticizer and stabilizer in weight ratio of 10:1:1, high-speed stirring, part of the material is used to prepare the first side of double-layer PVC artificial leather, another part of the material is used to prepare the second side of double-layer PVC artificial leather, use the compound machine to compound, pre-coat the self-made adhesive on the cloth base, then carry out calendering and foaming in the foaming oven on both sides of the cloth base, finally use cooling roller to cool, and use automatic winding machine to wind, to prepare finished product.

[0040] Preferably, in step (6):

[0041] (a) the first side of double-layer PVC artificial leather preparation process: material mixing, initial plasticization in internal mixer, plasticization in open mill, filtration in filter machine, compounding with cloth base in compound machine, calendering and film forming in calender machine;

[0042] (b) the second side of double-layer PVC artificial leather preparation process: material mixing, initial plasticization in internal mixer, plasticization in open mill, filtration in filter machine, compounding with cloth base in compound machine, foaming in foaming oven;

[0043] (c) cooling in cooling roller, winding in automatic winding machine.

[0044] Preferably, the foaming agent is added when the initial plasticization of the second side of double-layer PVC artificial leather in step (b) is completed.

[0045] Preferably, the plasticization in step (b) is carried out for multiple times with 2-3 times of large turning.

[0046] Preferably, the calendering and foaming treatment of both sides of double-layer PVC artificial leather in step (b) are carried out simultaneously.

[0047] Preferably, the temperature of calender machine when compounding with cloth base in step (a) is 150-160℃, the roller linear speed is 26-30 m / min, the lamination roller linear speed is 40 m / min, and the lamination roller pressure is 2.0-3.0 MPa.

[0048] Example 1: high permeability PVC artificial leather one:

[0049] A high permeability PVC artificial leather, the PVC artificial leather components are as follows in parts by weight:

[0050] The PVC resin is 20 parts by weight, the tetraethylenepentamine is 5 parts by weight, the modified PVC is 10 parts by weight, the self-made adhesive is 5 parts by weight, the soybean protein is 5 parts by weight, the natural resin is 5 parts by weight, the vegetable oil is 2 parts by weight, the vinyl acetate-ethylene copolymer emulsion is 10 parts by weight, the plasticizer is 2 parts by weight, the stabilizer is 2 parts by weight, and the foaming agent is 2 parts by weight.

[0051] The preparation method of the PVC artificial leather is as follows:

[0052] (1) The PVC resin with a weight fraction of 20 parts is placed in a reaction kettle in a dry state under normal pressure, and a chlorination reaction is directly carried out, the mixed gas for the reaction contains 50% of chlorine, 0.75% of fluorine, and 49.25% of nitrogen, and after 100 minutes of reaction, chlorinated PVC is obtained;

[0053] (2) After the chlorinated PVC is added with a heat stabilizer and a fixed plasticizer, tetraethylenepentamine is added for mixing, the molar ratio of the chlorinated PVC to the tetraethylenepentamine is 8:1, and the mixture is sealed in a high-speed mixer and heated for mixing to obtain modified PVC;

[0054] (3) The natural resin and water are added to a flask equipped with a thermometer, a stirrer, and a condenser tube in a volume ratio of 1:4, sodium hydroxide is added dropwise, the pH is adjusted to 6, the temperature is raised to 90°C, and the reaction is carried out for 2 hours to obtain a modified natural resin;

[0055] (4) The vegetable oil and maleic anhydride are added to a flask equipped with a thermometer, a stirrer, and a condenser tube, hydrogen peroxide is used as a catalyst, the mixture is heated to 190°C in a glycerol bath for reaction, and then cooled to 80°C with cold water, sodium hydroxide is added dropwise to obtain a modified vegetable oil;

[0056] (5) The soybean protein is added to a 2-thioethanol solution, and the modified natural resin, the modified vegetable oil, and the vinyl acetate-ethylene copolymer emulsion are sequentially added for blending in a volume ratio of 1:1:5 to obtain a self-made adhesive;

[0057] (6) The modified polyvinyl chloride is mixed with the plasticizer and the stabilizer at a weight ratio of 10:1:1, high-speed stirring, a part of the material is prepared for the first side of the double-layer PVC artificial leather, another part of the material is prepared for the second side of the double-layer PVC artificial leather, the foaming agent is added when the initial plasticization is completed in the second side preparation process, the plasticization is turned over several times and accompanied by 2 times of large turning, the self-made adhesive is pre-coated with the cloth base before compounding with the compound machine, then the cloth base is simultaneously rolled into a film with a calender and foamed in a foaming oven, the calender temperature is 150℃, the roller linear speed is 26m / min, the lamination roller linear speed is 40m / min, the lamination roller pressure is 2.5MPa, finally the cooling roller is used for cooling, and the automatic winding machine is used for winding, to obtain the finished product.

[0058] The stabilizer is a barium-zinc stabilizer;

[0059] The plasticizer is a mixture of dioctyl phthalate and dibutyl phthalate.

[0060] Example 2: High-permeability PVC artificial leather I:

[0061] A high-permeability PVC artificial leather, the components of which are as follows in parts by weight:

[0062] The weight fraction of polyvinyl chloride is 40 parts, the weight fraction of tetraethylenepentamine is 10 parts, the weight fraction of modified polyvinyl chloride is 15 parts, the weight fraction of self-made adhesive is 10 parts, the weight fraction of soybean protein is 10 parts, the weight fraction of natural resin is 10 parts, the weight fraction of vegetable oil is 5 parts, the weight fraction of vinyl acetate-ethylene copolymer emulsion is 15 parts, the weight fraction of plasticizer is 5 parts, the weight fraction of stabilizer is 5 parts, and the weight fraction of foaming agent is 5 parts.

[0063] The preparation method of the PVC artificial leather is as follows:

[0064] (1) The polyvinyl chloride resin with a weight fraction of 40 parts in a dry state is directly subjected to chlorination reaction in a reaction kettle under normal pressure, the mixed gas for the reaction contains 50% of chlorine, 0.75% of fluorine, and 49.25% of nitrogen, and the chlorinated polyvinyl chloride is obtained after 100 minutes of reaction;

[0065] (2) After adding the heat stabilizer and the fixed plasticizer to the chlorinated polyvinyl chloride, tetraethylenepentamine is added and mixed, the molar ratio of the chlorinated polyvinyl chloride to tetraethylenepentamine is 8:1, and the mixture is sealed in a high-speed mixer and heated for mixing to obtain modified polyvinyl chloride;

[0066] (3) The natural resin and water are added to a flask equipped with a thermometer, a stirrer, and a condenser tube at a volume ratio of 1:4, sodium hydroxide is added dropwise, the pH is adjusted to 7, the temperature is raised to 95℃, and the reaction is carried out for 2 hours to obtain modified natural resin;

[0067] (4) In the flask equipped with thermometer, stirrer and condenser, add vegetable oil and maleic anhydride, hydrogen peroxide as catalyst, heated to 190℃ in glycerol bath to carry out the reaction, then cooled to 80℃ with cold water, drop in sodium hydroxide to obtain modified vegetable oil;

[0068] (5) Add soybean protein into 2-sulfhydryl ethanol solution, add modified natural resin, modified vegetable oil, vinyl acetate-ethylene copolymer emulsion in turn for blending, volume ratio is 1:1:5, to prepare self-made adhesive;

[0069] (6) Mix modified polyvinyl chloride with plasticizer and stabilizer according to weight ratio of 10:1:1, high-speed stirring, part of the material is used to prepare the first side of double-layer PVC artificial leather, another part of the material is used to prepare the second side of double-layer PVC artificial leather, add foaming agent when the initial plasticization is completed in the preparation process of the second side, and turn over several times during plasticization with 3 times of large turning, pre-coat the self-made adhesive on the cloth base when using the compound machine to compound, then carry out film forming and foaming in the foaming oven by calendering machine on both sides of the cloth base, the temperature of the calendering machine is 160℃, the roller linear speed is 29m / min, the lamination roller linear speed is 40m / min, the lamination roller pressure is 2.8MPa, finally use cooling roller to cool, and use automatic winding machine to wind, to prepare finished product.

[0070] The stabilizer is barium-zinc stabilizer;

[0071] The plasticizer is a mixture of dioctyl phthalate and dibutyl phthalate.

[0072] Comparative Example 1

[0073] The prescription composition of Comparative Example 1 is the same as that of Example 1. The difference between the preparation method of the PVC artificial leather of Comparative Example 1 and that of Example 1 is that the preparation of steps (1) and (2) is not carried out, and step (6) is directly prepared using polyvinyl chloride, and the rest of the preparation steps are the same as those of Example 1.

[0074] Comparative Example 2

[0075] The prescription composition of Comparative Example 2 is the same as that of Example 1. The difference between the preparation method of the PVC artificial leather of Comparative Example 2 and that of Example 1 is that the preparation of steps (3), (4) and (5) is not carried out, and step (6) is directly prepared using ordinary adhesive, and the rest of the preparation steps are the same as those of Example 1.

[0076] Test Example 1

[0077] 1. Test method

[0078] Example 1 and Comparative Example 1 are control tests. The high-elasticity PVC artificial leather prepared by Example 1 and Comparative Example 2 is cut into the same size, and the minimum force that can destroy the tensile is compared.

[0079] 2. Test results

[0080] The minimum force at which the example 1 and the comparative example 1 were stretched to break was compared, and the results are shown in Table 2.

[0081] Force (N) Example 1 235.9 Comparative Example 1 195.6

[0082] By comparing the minimum force at which the example 1 and the comparative example 1 were broken, it can be obviously found that the minimum force at which the example 1 was broken is greater than that of the comparative example 1, which indicates that the modified PVC used in the present application can enhance the tensile strength of the PVC artificial leather, and indicates that the PVC artificial leather prepared in the present application has excellent tensile resistance.

[0083] Test Example 2

[0084] 1. Test method

[0085] The example 1 and the comparative example 2 were control tests, and the high-elasticity PVC artificial leather prepared from the example 1 and the comparative example 2 was cut into the same size, and the force at which the material and the cloth base were separated was compared.

[0086] 2. Test results

[0087] The comparison of the force at which the high-elasticity PVC artificial leather material prepared from the example 1 and the comparative example 2 was separated from the cloth base is shown in Table 1.

[0088] Force (N) Example 1 100.8 Comparative Example 2 88.2

[0089] By comparing the force at which the high-elasticity PVC artificial leather material prepared from the example 1 and the comparative example 2 was separated from the cloth base, the force at which the material of the example 1 was separated from the cloth base was greater than that of the comparative example 2, which indicates that the self-made adhesive used in the present application can make the material and the cloth base more closely combined, and indicates that the high-elasticity PVC artificial leather prepared in the present application has greater peel strength.

[0090] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and for those skilled in the art, the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A high permeability PVC artificial leather, characterized in that, The raw materials include 10-15 parts of modified polyvinyl chloride, 5-10 parts of self-made adhesive; The modified polyvinyl chloride is prepared by chlorination treatment of polyvinyl chloride and modification with tetraethylenepentamine; The specific steps are as follows: 20-40 parts of polyvinyl chloride resin in dry state is put into a reaction kettle under normal pressure, and chlorination reaction is directly carried out, the mixed gas for reaction contains 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen, and after 100 minutes of reaction, chlorinated polyvinyl chloride is obtained; after adding heat stabilizer and fixed plasticizer to the chlorinated polyvinyl chloride, 5-10 parts of tetraethylenepentamine is added, the molar ratio of chlorinated polyvinyl chloride to tetraethylenepentamine is 8:1, and the mixture is sealed in a high-speed mixer and mixed by heating to obtain modified polyvinyl chloride; The self-made adhesive is prepared by adding 5-10 parts of soybean protein into a 2-sulfide ethanol solution, and then adding modified natural resin, modified vegetable oil and 10-15 parts of vinyl acetate-ethylene copolymer emulsion in sequence for blending, wherein the volume ratio of the modified natural resin, the modified vegetable oil and the vinyl acetate-ethylene copolymer emulsion is 1:1:5; The modified natural resin is prepared by adding 5-10 parts of natural resin and water into a flask equipped with a thermometer, a stirrer and a condenser tube, with a volume ratio of 1:4, dropwise adding sodium hydroxide, and heating to 90-95℃ for 2 hours of reaction; The modified vegetable oil is prepared by adding 2-5 parts of vegetable oil and maleic anhydride into a flask equipped with a thermometer, a stirrer and a condenser tube, using hydrogen peroxide as a catalyst, heating to 190-200℃ in a glycerol bath for reaction, then cooling to 80℃ with cold water, and dropwise adding sodium hydroxide to obtain the modified vegetable oil; The preparation method of the high-permeability PVC artificial leather is as follows: the modified polyvinyl chloride is mixed with 2-5 parts of plasticizer and 2-5 parts of stabilizer at a weight ratio of 10:1:1, high-speed stirring is carried out, a part of the material is used for preparing the first side of the double-layer PVC artificial leather, another part of the material is used for preparing the second side of the double-layer PVC artificial leather, 2-5 parts of foaming agent is added when the initial plasticization is completed in the preparation process of the second side, the plasticization is carried out for multiple times with 2-3 times of large turning, the self-made adhesive is pre-applied on the cloth base before compounding with a compound machine, then the cloth base is simultaneously subjected to calendering film forming and foaming oven foaming, the calendering machine temperature is 150-160℃, the roller linear speed is 26-30 m / min, the lamination roller linear speed is 40 m / min, the lamination roller pressure is 2.0-3.0 MPa, and finally the product is prepared by using a cooling roller for cooling and an automatic winding machine for winding.