阅读说明：本技术 一种高通透性pvc人造革及其应用 (High-permeability PVC artificial leather and application thereof ) 是由 顾跃进 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种高通透性PVC人造革及其应用,包括聚氯乙烯、四乙烯五胺、改性聚氯乙烯、自制胶粘剂、大豆蛋白、天然树脂、植物油、醋酸乙烯-乙烯共聚乳液、增塑剂、稳定剂、发泡剂。经过氯化处理的聚氯乙烯分子提高热变形温度和材料的溶解性能,同时还具有良好的黏结性；用四乙烯五胺将氯化后的聚氯乙烯进行改性,最大限度的增强了材料的拉伸强度；自制胶粘剂利用醋酸乙烯-乙烯共聚乳液与改性天然树脂、改性植物油和改性大豆蛋白,提高了PVC人造革的剥离强度；制备人造革时两面的压延成膜与发泡处理同时进行,发泡处理向压延成膜提供更多的压力使材料与布基结合的更紧密,也使得发泡时间缩短。(The invention discloses high-permeability PVC artificial leather and application thereof. The chlorinated polyvinyl chloride molecules improve the thermal deformation temperature and the solubility of the material, and have good cohesiveness; the chlorinated polyvinyl chloride is modified by using tetraethylenepentamine, so that the tensile strength of the material is enhanced to the maximum extent; the self-made adhesive improves the peeling strength of the PVC artificial leather by using the vinyl acetate-ethylene copolymer emulsion, the modified natural resin, the modified vegetable oil and the modified soybean protein; when the artificial leather is prepared, calendering film forming and foaming treatment on two sides are carried out simultaneously, and the foaming treatment provides more pressure for the calendering film forming so that the material is combined with the cloth base more tightly, and the foaming time is also shortened.)

1. The PVC artificial leather with high permeability is characterized by comprising the following raw materials in parts by weight: 20-40 parts of polyvinyl chloride, 5-10 parts of tetraethylenepentamine, 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.

2. The high permeability PVC artificial leather according to claim 1, wherein: the modified polyvinyl chloride is prepared by firstly chlorinating polyvinyl chloride and then modifying with tetraethylenepentamine.

3. The high permeability PVC artificial leather according to claim 2, wherein: the self-made adhesive is prepared by taking a 2-sulfenyl ethanol solution of soy protein as a solvent, blending modified natural resin and vinyl acetate-ethylene copolymer emulsion in the solution, and adding modified vegetable oil.

4. The high permeability PVC artificial leather according to claim 4, wherein the preparation method of the high permeability PVC artificial leather mainly comprises the process flow:

(1) putting the polyvinyl chloride resin into a reaction kettle in a dry state under normal pressure, directly carrying out chlorination reaction, introducing a mixed gas containing 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen into the reaction kettle, and reacting for 100min to obtain chlorinated polyvinyl chloride;

(2) adding a heat stabilizer and a fixed plasticizer into chlorinated polyvinyl chloride, adding tetraethylenepentamine, and mixing, wherein the mol ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8: 1, sealing in a high-speed mixer, heating and mixing to obtain modified polyvinyl chloride;

(3) a flask provided with a thermometer, a stirrer and a condenser is filled with natural resin and water, and the volume ratio of the natural resin to the water is 1: 4, dropwise adding sodium hydroxide, adjusting the pH value to 6-7, heating to 90-95 ℃, and reacting for 2 hours to obtain modified natural resin;

(4) adding vegetable oil, maleic anhydride and hydrogen peroxide as catalysts into a flask provided with a thermometer, a stirrer and a condenser, heating to 190-200 ℃ in a glycerol bath for reaction, cooling to 80 ℃ with cold water, and dropwise adding sodium hydroxide to obtain modified vegetable oil;

(5) adding soybean protein into a 2-sulfenyl ethanol solution, sequentially adding modified natural resin, modified vegetable oil and vinyl acetate-ethylene copolymer emulsion, and blending, wherein the volume ratio is 1: 1: 5, preparing a self-made adhesive;

(6) mixing modified polyvinyl chloride, plasticizer and stabilizer according to the weight ratio of 10: 1: 1, high-speed stirring, the preparation of the first face of double-deck PVC synthetic leather is carried out to some material, and the preparation of the second face of double-deck PVC synthetic leather is carried out to another part material, paints self-made adhesive with the cloth base in advance when using the compounding machine complex, then carries out calender calendering membrane and foaming oven foaming simultaneously in cloth base both sides, uses the chill roll cooling at last, and automatic winding machine batches, makes the finished product.

5. High permeability PVC artificial leather according to claim 4, characterized in that: the step (6) is as follows:

(a) the first surface preparation process of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the mixture with a cloth base by a compounding machine, and calendering by a calender to form a film;

(b) the preparation process of the second surface of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the compound machine and the cloth base, and foaming by a foaming oven;

(c) and cooling by a cooling roller and coiling by an automatic coiling machine.

6. The high permeability PVC artificial leather according to claim 5, wherein: and (b) adding a foaming agent into the double-layer PVC artificial leather when the initial plasticization is about to be completed in the preparation process of the second side in the step (b).

7. The high permeability PVC artificial leather according to claim 5, wherein: and (b) turning for multiple times during plasticizing and carrying out 2-3 times of large turning.

8. The high permeability PVC artificial leather according to claim 5, wherein: and (b) simultaneously carrying out calendering film forming and foaming treatment on two sides of the double-layer PVC artificial leather.

9. The high permeability PVC artificial leather according to claim 5, wherein: the calender temperature when the double-layer PVC artificial leather is compounded with the cloth base in the first surface preparation process in the step (a) is 150-160 ℃, the roller linear velocity is 26-30 m/min, the laminating roller linear velocity is 40m/min, and the laminating roller pressure is 2.0-3.0 MPa.

10. The high permeability PVC artificial leather according to claim 9, wherein the high permeability PVC artificial leather can completely replace leather in a normal or low temperature environment.

Technical Field

The invention relates to the technical field of PVC artificial leather, in particular to high-permeability PVC artificial leather and application thereof.

Background

With the continuous progress and development of PVC production and processing technology, the PVC artificial leather not only has greatly improved quality, but also has increasingly more colors and varieties. The PVC artificial leather having high permeability is very popular, but excessive pursuit of higher permeability affects other properties of the PVC artificial leather, such as stretch resistance, peel strength, cold resistance, high temperature resistance, and the like.

Therefore, the performance of the PVC artificial leather with high permeability is optimized, the permeability of the PVC artificial leather is not influenced while the performance is improved, and the PVC artificial leather has a good development prospect. Therefore, it is very necessary to prepare a high permeability PVC artificial leather with high tensile strength and high peel strength.

Disclosure of Invention

The present invention is directed to providing a high permeability PVC artificial leather to solve the problems set forth in the above background art.

In order to solve the above technical problem, a first aspect of the present invention provides the following technical solutions: the PVC artificial leather with high permeability is characterized by comprising the following raw materials in parts by weight:

20-40 parts of polyvinyl chloride, 5-10 parts of tetraethylenepentamine, 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.

Preferably, the modified polyvinyl chloride is prepared by firstly chlorinating polyvinyl chloride and then modifying with tetraethylenepentamine, wherein the chlorinated polyvinyl chloride has the advantages of increased irregularity of molecular arrangement, increased polarity, increased chemical stability, improved thermal deformation temperature and material solubility, and good cohesiveness; the chlorinated polyvinyl chloride is modified by the tetraethylenepentamine, the tetraethylenepentamine can react with active chlorine, and the image ion type cross-linked bonds are grafted on a polyvinyl chloride molecular chain, so that the content of the active chlorine of the chlorinated polyvinyl chloride is increased, more tetraethylenepentamine reacts with the polyvinyl chloride, and the tensile strength of the material is enhanced to the maximum extent.

Preferably, the self-made adhesive is prepared by taking a 2-sulfenyl ethanol solution of soybean protein as a solvent, blending modified natural resin and vinyl acetate-ethylene copolymer emulsion in the solution, and adding modified vegetable oil, and the self-made adhesive improves the peeling strength of the PVC artificial leather by using the vinyl acetate-ethylene copolymer emulsion, the modified natural resin, the modified vegetable oil and the modified soybean protein.

The second aspect of the present invention provides: a preparation method of high permeability PVC artificial leather comprises the following process flows:

(1) putting the polyvinyl chloride resin into a reaction kettle in a dry state under normal pressure, directly carrying out chlorination reaction, introducing a mixed gas containing 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen into the reaction kettle, and reacting for 100min to obtain chlorinated polyvinyl chloride;

(2) adding a heat stabilizer and a fixed plasticizer into chlorinated polyvinyl chloride, adding tetraethylenepentamine, and mixing, wherein the mol ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8: 1, sealing in a high-speed mixer, heating and mixing to obtain modified polyvinyl chloride;

(3) a flask provided with a thermometer, a stirrer and a condenser is filled with natural resin and water, and the volume ratio of the natural resin to the water is 1: 4, dropwise adding sodium hydroxide, adjusting the pH value to 6-7, heating to 90-95 ℃, and reacting for 2 hours to obtain modified natural resin;

(4) adding vegetable oil, maleic anhydride and hydrogen peroxide as catalysts into a flask provided with a thermometer, a stirrer and a condenser, heating to 190-200 ℃ in a glycerol bath for reaction, cooling to 80 ℃ with cold water, and dropwise adding sodium hydroxide to obtain modified vegetable oil;

(5) adding soybean protein into a 2-sulfenyl ethanol solution, sequentially adding modified natural resin, modified vegetable oil and vinyl acetate-ethylene copolymer emulsion, and blending, wherein the volume ratio is 1: 1: 5, preparing a self-made adhesive;

(6) mixing modified polyvinyl chloride, plasticizer and stabilizer according to the weight ratio of 10: 1: 1, high-speed stirring, the preparation of the first face of double-deck PVC synthetic leather is carried out to some material, and the preparation of the second face of double-deck PVC synthetic leather is carried out to another part material, paints self-made adhesive with the cloth base in advance when using the compounding machine complex, then carries out calender calendering membrane and foaming oven foaming simultaneously in cloth base both sides, uses the chill roll cooling at last, and automatic winding machine batches, makes the finished product.

Preferably, in the step (6):

(a) the first surface preparation process of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the mixture with a cloth base by a compounding machine, and calendering by a calender to form a film;

(b) the preparation process of the second surface of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the compound machine and the cloth base, and foaming by a foaming oven;

(c) and cooling by a cooling roller and coiling by an automatic coiling machine.

Preferably, the double-layered PVC artificial leather is added with a foaming agent just before the completion of initial plasticization in the second side preparation process of step (b).

Preferably, during the plasticizing in the step (b), the mixture is turned for multiple times and is turned for 2-3 times.

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

Preferably, the calender temperature when the double-layer PVC artificial leather is compounded with the cloth base in the first-side preparation process in the step (a) is 150-160 ℃, the roller linear speed is 26-30 m/min, the laminating roller linear speed is 40m/min, and the laminating roller pressure is 2.0-3.0 MPa.

Compared with the prior art, the invention has the following beneficial effects:

the modified polyvinyl chloride is prepared by firstly chlorinating polyvinyl chloride and then modifying tetraethylenepentamine; the chlorinated polyvinyl chloride has the advantages that the irregularity of molecular arrangement is increased, the polarity is increased, the chemical stability is increased, the thermal deformation temperature and the solubility of the material are improved, and meanwhile, the chlorinated polyvinyl chloride has good cohesiveness; modifying chlorinated polyvinyl chloride by using tetraethylenepentamine, wherein the tetraethylenepentamine can react with active chlorine and is grafted on a polyvinyl chloride molecular chain in an image ion type cross-linking manner, and the content of the active chlorine of the chlorinated polyvinyl chloride is increased, so that more tetraethylenepentamine reacts with the polyvinyl chloride, and the tensile strength of the material is enhanced to the maximum extent; the treatment of the polyvinyl chloride enhances the tensile strength and optimizes one part of the performance of the polyvinyl chloride.

When the artificial leather is prepared, a self-made adhesive is used; taking 2-sulfenyl ethanol solution of soy protein as a solvent, blending modified natural resin and vinyl acetate-ethylene copolymer emulsion in the solution, and adding modified vegetable oil; 2-sulfenyl ethanol can modify the soybean protein, can open disulfide bonds in the protein, expose more functional groups, increase the bond connection required for constructing a membrane network structure, further improve the mechanical property of the soybean protein, and improve the surface hydrophobicity along with the increase of hydrophobic groups, so that the integral water resistance is increased; the blending of the modified natural resin and the vinyl acetate-ethylene copolymer emulsion increases the particle size and the flow of the colloidal particles of the blending liquid, reduces the viscosity of the blending liquid and improves the peel strength of the blending liquid; 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, so that the hydrophobicity and the peel strength of the modified vegetable oil and the vinyl acetate-ethylene copolymer emulsion of the modified natural resin are increased; when the artificial leather is prepared, the peeling strength is also increased due to the adsorption effect of the polyvinyl chloride on the protein.

Carrying out double-layer PVC artificial leather by using a calendering compounding method, carrying out calendering compounding on one side of a cloth base, mixing and preliminarily plasticizing raw materials, plasticizing, filtering impurities, calendering to form a film on a calender, compounding the film with the cloth base, carrying out a foaming process on the other side of the cloth base, adding a foaming agent when the raw materials are mixed and preliminarily plasticized, carrying out repeated stirring during plasticizing and carrying out large turnover for 2-3 times to uniformly disperse the foaming agent and other auxiliaries, filtering, carrying out foaming treatment in a foaming oven, carrying out calendering film forming and foaming treatment on the two sides simultaneously, providing more pressure for calendering to form the film so that the material is combined with the cloth base more tightly, shortening the foaming time, and finally carrying out cooling and coiling for one time to obtain an artificial leather finished product; the PVC artificial leather has excellent permeability, and the double-layer structure avoids the deterioration of cold resistance after single foaming treatment, thereby enlarging the application range of the PVC artificial leather.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The PVC artificial leather with high permeability is characterized by comprising the following raw materials in parts by weight:

20-40 parts of polyvinyl chloride, 5-10 parts of tetraethylenepentamine, 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.

Preferably, the modified polyvinyl chloride is prepared by firstly chlorinating polyvinyl chloride and then modifying with tetraethylenepentamine, wherein the chlorinated polyvinyl chloride has the advantages of increased irregularity of molecular arrangement, increased polarity, increased chemical stability, improved thermal deformation temperature and material solubility, and good cohesiveness; the chlorinated polyvinyl chloride is modified by the tetraethylenepentamine, the tetraethylenepentamine can react with active chlorine, and the image ion type cross-linked bonds are grafted on a polyvinyl chloride molecular chain, so that the content of the active chlorine of the chlorinated polyvinyl chloride is increased, more tetraethylenepentamine reacts with the polyvinyl chloride, and the tensile strength of the material is enhanced to the maximum extent.

Preferably, the self-made adhesive is prepared by taking a 2-sulfenyl ethanol solution of soybean protein as a solvent, blending modified natural resin and vinyl acetate-ethylene copolymer emulsion in the solution, and adding modified vegetable oil, and the self-made adhesive improves the peeling strength of the PVC artificial leather by using the vinyl acetate-ethylene copolymer emulsion, the modified natural resin, the modified vegetable oil and the modified soybean protein.

The second aspect of the present invention provides: a preparation method of high permeability PVC artificial leather comprises the following process flows:

(1) putting the polyvinyl chloride resin into a reaction kettle in a dry state under normal pressure, directly carrying out chlorination reaction, introducing a mixed gas containing 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen into the reaction kettle, and reacting for 100min to obtain chlorinated polyvinyl chloride;

(2) adding a heat stabilizer and a fixed plasticizer into chlorinated polyvinyl chloride, adding tetraethylenepentamine, and mixing, wherein the mol ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8: 1, sealing in a high-speed mixer, heating and mixing to obtain modified polyvinyl chloride;

(3) a flask provided with a thermometer, a stirrer and a condenser is filled with natural resin and water, and the volume ratio of the natural resin to the water is 1: 4, dropwise adding sodium hydroxide, adjusting the pH value to 6-7, heating to 90-95 ℃, and reacting for 2 hours to obtain modified natural resin;

(4) adding vegetable oil, maleic anhydride and hydrogen peroxide as catalysts into a flask provided with a thermometer, a stirrer and a condenser, heating to 190-200 ℃ in a glycerol bath for reaction, cooling to 80 ℃ with cold water, and dropwise adding sodium hydroxide to obtain modified vegetable oil;

(5) adding soybean protein into a 2-sulfenyl ethanol solution, sequentially adding modified natural resin, modified vegetable oil and vinyl acetate-ethylene copolymer emulsion, and blending, wherein the volume ratio is 1: 1: 5, preparing a self-made adhesive;

(6) mixing modified polyvinyl chloride, plasticizer and stabilizer according to the weight ratio of 10: 1: 1, high-speed stirring, the preparation of the first face of double-deck PVC synthetic leather is carried out to some material, and the preparation of the second face of double-deck PVC synthetic leather is carried out to another part material, paints self-made adhesive with the cloth base in advance when using the compounding machine complex, then carries out calender calendering membrane and foaming oven foaming simultaneously in cloth base both sides, uses the chill roll cooling at last, and automatic winding machine batches, makes the finished product.

Preferably, in the step (6):

(a) the first surface preparation process of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the mixture with a cloth base by a compounding machine, and calendering by a calender to form a film;

(b) the preparation process of the second surface of the double-layer PVC artificial leather comprises the following steps: mixing materials, initially plasticizing by an internal mixer, plasticizing by an open mill, filtering by a filter, compounding the compound machine and the cloth base, and foaming by a foaming oven;

(c) and cooling by a cooling roller and coiling by an automatic coiling machine.

Preferably, the double-layered PVC artificial leather is added with a foaming agent just before the completion of initial plasticization in the second side preparation process of step (b).

Preferably, during the plasticizing in the step (b), the mixture is turned for multiple times and is turned for 2-3 times.

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

Preferably, the calender temperature when the double-layer PVC artificial leather is compounded with the cloth base in the first-side preparation process in the step (a) is 150-160 ℃, the roller linear speed is 26-30 m/min, the laminating roller linear speed is 40m/min, and the laminating roller pressure is 2.0-3.0 MPa.

Example 1: high-permeability PVC artificial leather I:

the high-permeability PVC artificial leather comprises the following components in parts by weight:

20 parts of polyvinyl chloride, 5 parts of tetraethylenepentamine, 10 parts of modified polyvinyl chloride, 5 parts of self-made adhesive, 5 parts of soybean protein, 5 parts of natural resin, 2 parts of vegetable oil, 10 parts of vinyl acetate-ethylene copolymer emulsion, 2 parts of plasticizer, 2 parts of stabilizer and 2 parts of foaming agent.

The preparation method of the PVC artificial leather comprises the following steps:

(1) putting 20 parts by weight of polyvinyl chloride resin into a reaction kettle in a dry state under normal pressure, directly performing chlorination reaction, introducing a mixed gas containing 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen, and reacting for 100min to obtain chlorinated polyvinyl chloride;

(2) adding a heat stabilizer and a fixed plasticizer into chlorinated polyvinyl chloride, adding tetraethylenepentamine, and mixing, wherein the mol ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8: 1, sealing in a high-speed mixer, heating and mixing to obtain modified polyvinyl chloride;

(3) a flask provided with a thermometer, a stirrer and a condenser is filled with natural resin and water, and the volume ratio of the natural resin to the water is 1: 4, dropwise adding sodium hydroxide, adjusting the pH value to 6, heating to 90 ℃, and reacting for 2 hours to obtain modified natural resin;

(4) adding vegetable oil, maleic anhydride and hydrogen peroxide as catalysts into a flask provided with a thermometer, a stirrer and a condenser, heating to 190 ℃ in a glycerol bath for reaction, cooling to 80 ℃ by using cold water, and dropwise adding sodium hydroxide to obtain modified vegetable oil;

(5) adding soybean protein into a 2-sulfenyl ethanol solution, sequentially adding modified natural resin, modified vegetable oil and vinyl acetate-ethylene copolymer emulsion, and blending, wherein the volume ratio is 1: 1: 5, preparing a self-made adhesive;

(6) mixing modified polyvinyl chloride, plasticizer and stabilizer according to the weight ratio of 10: 1: 1, high-speed stirring, preparing a first surface of double-layer PVC artificial leather by using one part of material, preparing a second surface of the double-layer PVC artificial leather by using the other part of material, adding a foaming agent when primary plasticization is about to be completed in a preparation process of the second surface, stirring for multiple times and carrying out 2 times of large turnover during plasticization, coating a self-made adhesive on a cloth base in advance when a compound machine is used for compounding, then simultaneously carrying out calender calendering film formation and foaming oven foaming on two sides of the cloth base, wherein the calender temperature is 150 ℃, the roller linear velocity is 26m/min, the laminating roller linear velocity is 40m/min, the laminating roller pressure is 2.5MPa, finally cooling by using a cooling roller, and coiling by using an automatic coiling machine to prepare a finished product.

The stabilizer is a barium zinc stabilizer;

the plasticizer is a mixture of dioctyl ester and dibutyl ester.

Example 2: high-permeability PVC artificial leather I:

the high-permeability PVC artificial leather comprises the following components in parts by weight:

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

The preparation method of the PVC artificial leather comprises the following steps:

(1) putting 40 parts by weight of polyvinyl chloride resin into a reaction kettle in a dry state under normal pressure, directly carrying out chlorination reaction, introducing a mixed gas containing 50% of chlorine, 0.75% of fluorine and 49.25% of nitrogen into the reaction kettle, and reacting for 100min to obtain chlorinated polyvinyl chloride;

(2) adding a heat stabilizer and a fixed plasticizer into chlorinated polyvinyl chloride, adding tetraethylenepentamine, and mixing, wherein the mol ratio of the chlorinated polyvinyl chloride to the tetraethylenepentamine is 8: 1, sealing in a high-speed mixer, heating and mixing to obtain modified polyvinyl chloride;

(3) a flask provided with a thermometer, a stirrer and a condenser is filled with natural resin and water, and the volume ratio of the natural resin to the water is 1: 4, dropwise adding sodium hydroxide, adjusting the pH value to 7, heating to 95 ℃, and reacting for 2 hours to obtain modified natural resin;

(4) adding vegetable oil, maleic anhydride and hydrogen peroxide as catalysts into a flask provided with a thermometer, a stirrer and a condenser, heating to 190 ℃ in a glycerol bath for reaction, cooling to 80 ℃ by using cold water, and dropwise adding sodium hydroxide to obtain modified vegetable oil;

(5) adding soybean protein into a 2-sulfenyl ethanol solution, sequentially adding modified natural resin, modified vegetable oil and vinyl acetate-ethylene copolymer emulsion, and blending, wherein the volume ratio is 1: 1: 5, preparing a self-made adhesive;

(6) mixing modified polyvinyl chloride, plasticizer and stabilizer according to the weight ratio of 10: 1: 1, high-speed stirring, wherein one part of materials is subjected to double-layer PVC artificial leather first surface preparation, the other part of materials is subjected to double-layer PVC artificial leather second surface preparation, a foaming agent is added when primary plasticization is about to be completed in a second surface preparation process, multiple stirring is carried out during plasticization and 3 times of large turnover are accompanied, a self-made adhesive is coated on a cloth base in advance when a compound machine is used for compounding, then a calender calendering film and foaming oven foaming are carried out on two sides of the cloth base simultaneously, the temperature of the calender is 160 ℃, the linear velocity of a roller is 29m/min, the linear velocity of a laminating roller is 40m/min, the pressure of the laminating roller is 2.8MPa, a cooling roller is used for cooling, and an automatic winding machine is.

The stabilizer is a barium zinc stabilizer;

the plasticizer is a mixture of dioctyl ester and dibutyl ester.

Comparative example 1

The formulation of comparative example 1 was the same as example 1. The preparation method of PVC artificial leather is different from example 1 only in that the preparation of steps (1) and (2) is not performed, step (6) is directly performed using polyvinyl chloride, and the remaining preparation steps are the same as example 1.

Comparative example 2

Comparative example 2 was formulated as in example 1. The preparation method of PVC artificial leather differs from example 1 only in that the preparation of steps (3), (4) and (5) is not performed, step (6) is directly performed using a general adhesive, and the remaining preparation steps are the same as example 1.

Test example 1

1. Test method

Example 1 and comparative example 1 are comparative tests, in which the high-elasticity PVC artificial leather prepared in example 1 and comparative example 2 was cut to the same size, and the tensile was compared with the minimum force with which it could be broken.

2. Test results

A comparison of the minimum forces experienced when example 1 and comparative example 1 were tensile failure is shown in table 2.

TABLE 2 minimum force values

	Force (N)
		Example 1	235.9
Comparative example 1	195.6

By comparing the minimum force applied when the example 1 and the comparative example 1 are damaged, it can be obviously found that the minimum force applied when the example 1 and the comparative example 1 are damaged is greater than that of the comparative example 1, which shows that the modified polyvinyl chloride used in the present invention can enhance the tensile strength of the PVC artificial leather, indicating that the PVC artificial leather prepared in the present invention has excellent tensile resistance.

Test example 2

1. Test method

Example 1 and comparative example 2 are comparative tests, the high-elasticity PVC artificial leather prepared in example 1 and comparative example 2 was cut to the same size, and the magnitude of the force received when the material was separated from the cloth base was compared.

2. Test results

The comparison of the force applied when the high-elasticity PVC artificial leather material prepared in example 1 and comparative example 2 is separated from the cloth base is shown in table 1.

TABLE 1 stress values

	Force (N)
		Example 1	100.8
Comparative example 2	88.2

The comparison of the strength of the thin fabric of the high-elasticity PVC artificial leather material prepared in the example 1 and the comparative example 2 with the strength of the fabric base in the separation process is carried out, and the strength of the material of the example 1 in the separation process is greater than that of the comparative example 2, so that the self-made adhesive used in the invention can enable the material to be combined with the fabric base more tightly, and the peel strength of the high-elasticity PVC artificial leather prepared in the invention is indicated to be greater.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.