阅读说明：本技术 一种无氟环保型运动鞋材合成革制备方法 (Preparation method of fluorine-free environment-friendly synthetic leather for sports shoes ) 是由 唐毅 于 2021-01-08 设计创作，主要内容包括：本发明公开了一种无氟环保型运动鞋材合成革制备方法,包括如下步骤：(1)配制聚氨酯浸渍浆料；(2)配制聚氨酯涂覆浆料；(3)将聚氨酯浸渍浆料倒入浸渍槽内,将无纺布充分浸在浸渍槽内,然后置于二甲基甲酰胺水溶液中凝固,干燥后再均匀涂覆聚氨酯涂覆浆料,干燥,再置于二甲基甲酰胺水溶液中凝固,然后用温水水洗,最后干燥冷却制得湿法贝斯；(4)配制干法面层浆料；(5)配制干法粘结层浆料；(6)在离型纸上涂覆一层干法面层浆料,烘干后,再涂覆一层干法粘结层浆料,烘至半干,再贴上湿度贝斯,干燥冷却得到合成革成品；(7)成品检测与包装。该制备方法未添加含氟原料,安全环保,制备的合成革透气性好,透湿量大,耐磨耐水解。(The invention discloses a preparation method of fluorine-free environment-friendly synthetic leather for sports shoes, which comprises the following steps: (1) preparing polyurethane dipping slurry; (2) preparing polyurethane coating slurry; (3) pouring the polyurethane dipping slurry into a dipping tank, fully dipping the non-woven fabric in the dipping tank, then placing the non-woven fabric in a dimethylformamide aqueous solution for solidification, uniformly coating the polyurethane coating slurry after drying, then placing the polyurethane coating slurry in the dimethylformamide aqueous solution for solidification, then washing the polyurethane coating slurry with warm water, and finally drying and cooling to obtain wet-process bass; (4) preparing dry-process surface layer slurry; (5) preparing dry bonding layer slurry; (6) coating a layer of dry-process surface layer slurry on release paper, drying, coating a layer of dry-process bonding layer slurry, drying to be semi-dry, attaching humidity base, drying and cooling to obtain a synthetic leather finished product; (7) and (6) detecting and packaging finished products. The preparation method does not add fluorine-containing raw materials, is safe and environment-friendly, and the prepared synthetic leather has good air permeability, large moisture permeability, wear resistance and hydrolysis resistance.)

1. A preparation method of fluorine-free environment-friendly synthetic leather for sports shoes is characterized by comprising the following steps:

(1) preparing polyurethane dipping slurry:

a. weighing 60-120 parts of polyurethane resin, 80-100 parts of dimethylformamide, 60-80 parts of acetone, 0.5-1.0 part of surfactant, 0.2-0.6 part of hydrolysis-resistant assistant and 0-8 parts of color paste according to parts by weight;

b. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 30-50 minutes, filtering and standing for later use;

(2) preparing polyurethane coating slurry:

c. weighing 100-150 parts of polyurethane resin, 70-90 parts of dimethylformamide, 40-60 parts of acetone, 0.5-1.0 part of surfactant, 0.4-0.8 part of hydrolysis-resistant assistant, 0.3-0.5 part of foaming agent and 0-8 parts of color paste according to parts by weight;

d. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 30-50 minutes, then adding the foaming agent in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering, standing and reserving for later use;

(3) and (3) wet bass production:

e. pouring the polyurethane dipping slurry prepared in the step (1) into a dipping tank, fully dipping the non-woven fabric in the dipping tank, then placing the non-woven fabric in a dimethylformamide water solution with the mass concentration of 25-35% for solidification, and drying at 60-80 ℃ for 60-80 minutes;

f. after drying, uniformly coating the polyurethane coating slurry prepared in the step (2), after coating, drying at 80-100 ℃ for 20-30 minutes, then drying at 100-120 ℃ for 10-20 minutes, then placing into a dimethylformamide aqueous solution with the mass concentration of 25-35% for solidification, then washing with warm water at 30-40 ℃ for 30-50 minutes, finally drying at 130-150 ℃ for 5-10 minutes, and cooling to obtain wet-process bass;

(4) preparing dry-process surface layer slurry:

g. weighing 80-120 parts of polyurethane slurry, 10-30 parts of dimethylformamide, 5-20 parts of acetone, 0.5-1.0 part of wear-resisting agent and 0-8 parts of color paste;

h. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane slurry, the wear-resisting agent and the color paste in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering and standing for later use;

(5) preparing dry bonding layer slurry:

i. weighing 100-150 parts of polyurethane slurry, 8-15 parts of dimethylformamide, 5-10 parts of acetone and 0.5-1.0 part of wear-resisting agent according to parts by weight;

j. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane slurry and the wear-resisting agent color paste in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering, and standing for later use;

(6) dry-process veneering production:

coating a layer of dry surface layer slurry prepared in the step (4) on release paper, drying at 60-80 ℃, coating a layer of dry bonding layer slurry prepared in the step (5), drying to be semi-dry at 80-100 ℃, attaching the humidity base prepared in the step (3), drying at 130-150 ℃ for 5-10 minutes, and cooling to obtain a synthetic leather finished product;

(7) and (3) finished product detection and packaging:

and (4) inspecting the synthetic leather finished product prepared in the step (6) according to an inspection standard, and filling the qualified finished product into a packing box.

2. The method for preparing the fluorine-free environment-friendly synthetic leather for the sports shoe material according to claim 1, wherein in the step (1) and the step (2), the surfactant is sodium dodecyl benzene sulfonate or polyoxyethylene laurate.

3. The method for preparing the fluorine-free environment-friendly synthetic leather for the sports shoes according to claim 1, wherein in the step (1) and the step (2), the hydrolysis-resistant assistant is FK-100.

4. The method for preparing the fluorine-free environment-friendly synthetic leather for the sports shoe material as claimed in claim 1, wherein in the step (2), the foaming agent is azodicarbonamide.

5. The method for preparing the fluorine-free environment-friendly synthetic leather for the sports shoe material as claimed in claim 1, wherein in the step (4) and the step (5), the wear-resistant agent is a wear-resistant agent FT-335 or a wear-resistant agent DY-9238B.

Technical Field

The invention belongs to the technical field of synthetic leather preparation, and particularly relates to a preparation method of fluorine-free environment-friendly synthetic leather for sports shoes.

Background

With the development of leather industry, leather products are more and more widely applied to daily life of people, a large amount of synthetic leather is needed in the manufacturing process of shoe materials, particularly sports shoe materials, and because the sports shoes need high hydrolysis resistance, fluorine-containing raw materials are used in the manufacturing process of synthetic leather at present, although the hydrolysis resistance of the synthetic leather is improved to a certain degree, a large amount of fluorine-containing compounds can be discharged in the manufacturing process, so that the environment is seriously polluted, and the production requirement cannot be met; therefore, how to overcome the above technical problems and disadvantages is a problem to be solved.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a preparation method of fluorine-free environment-friendly synthetic leather for sports shoes, which is simple and easy to operate, does not add fluorine-containing raw materials in the preparation process, does not cause environmental pollution, is safe and environment-friendly, has beautiful surface, good air permeability, large moisture permeability, wear resistance and hydrolysis resistance, and meets the processing requirements of the sports shoes.

The purpose of the invention is realized as follows: a preparation method of fluorine-free environment-friendly synthetic leather for sports shoes comprises the following steps:

(1) preparing polyurethane dipping slurry:

a. weighing 60-120 parts of polyurethane resin, 80-100 parts of dimethylformamide, 60-80 parts of acetone, 0.5-1.0 part of surfactant, 0.2-0.6 part of hydrolysis-resistant assistant and 0-8 parts of color paste according to parts by weight;

b. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 30-50 minutes, filtering and standing for later use;

(2) preparing polyurethane coating slurry:

c. weighing 100-150 parts of polyurethane resin, 70-90 parts of dimethylformamide, 40-60 parts of acetone, 0.5-1.0 part of surfactant, 0.4-0.8 part of hydrolysis-resistant assistant, 0.3-0.5 part of foaming agent and 0-8 parts of color paste according to parts by weight;

d. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 30-50 minutes, then adding the foaming agent in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering, standing and reserving for later use;

(3) and (3) wet bass production:

e. pouring the polyurethane dipping slurry prepared in the step (1) into a dipping tank, fully dipping the non-woven fabric in the dipping tank, then placing the non-woven fabric in a dimethylformamide water solution with the mass concentration of 25-35% for solidification, and drying at 60-80 ℃ for 60-80 minutes;

f. after drying, uniformly coating the polyurethane coating slurry prepared in the step (2), after coating, drying at 80-100 ℃ for 20-30 minutes, then drying at 100-120 ℃ for 10-20 minutes, then placing into a dimethylformamide aqueous solution with the mass concentration of 25-35% for solidification, then washing with warm water at 30-40 ℃ for 30-50 minutes, finally drying at 130-150 ℃ for 5-10 minutes, and cooling to obtain wet-process bass;

(4) preparing dry-process surface layer slurry:

g. weighing 80-120 parts of polyurethane slurry, 10-30 parts of dimethylformamide, 5-20 parts of acetone, 0.5-1.0 part of wear-resisting agent and 0-8 parts of color paste;

h. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane slurry, the wear-resisting agent and the color paste in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering and standing for later use;

(5) preparing dry bonding layer slurry:

i. weighing 100-150 parts of polyurethane slurry, 8-15 parts of dimethylformamide, 5-10 parts of acetone and 0.5-1.0 part of wear-resisting agent according to parts by weight;

j. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20-30 minutes, then adding the polyurethane slurry and the wear-resisting agent color paste in the formula amount into the material mixing kettle, stirring for 40-60 minutes, filtering, and standing for later use;

(6) dry-process veneering production:

coating a layer of dry surface layer slurry prepared in the step (4) on release paper, drying at 60-80 ℃, coating a layer of dry bonding layer slurry prepared in the step (5), drying to be semi-dry at 80-100 ℃, attaching the humidity base prepared in the step (3), drying at 130-150 ℃ for 5-10 minutes, and cooling to obtain a synthetic leather finished product;

(7) and (3) finished product detection and packaging:

and (4) inspecting the synthetic leather finished product prepared in the step (6) according to an inspection standard, and filling the qualified finished product into a packing box.

Further, in the step (1) and the step (2), the surfactant is sodium dodecyl benzene sulfonate or polyoxyethylene laurate.

Further, in the step (1) and the step (2), the hydrolysis-resistant additive is a hydrolysis-resistant additive FK-100.

Further, in the step (2), the foaming agent is azodicarbonamide.

Further, in the step (4) and the step (5), the anti-wear agent is anti-wear agent FT-335 or anti-wear agent DY-9238B.

The preparation method of the fluorine-free environment-friendly synthetic leather for the sports shoes has the beneficial effects that:

1. according to the invention, when polyurethane dipping slurry, polyurethane coating slurry, dry-process surface layer slurry and dry-process bonding layer slurry are prepared, dimethylformamide and acetone are used as solvents, the boiling point of dimethylformamide is high and is not volatile, and when the polyurethane is formed into a film, gaps among chains are reduced or disappear due to the movement of macromolecular chains, so that a compact film is formed, the boiling point of acetone is low and is volatile, and when the polyurethane is formed into a film, the macromolecular chains are not easy to aggregate, so that the compact film can be formed.

2. According to the invention, when the wet-process Bayes is prepared, the non-woven fabric is fully soaked in a dipping tank, then the non-woven fabric is placed in a dimethylformamide aqueous solution with the mass concentration of 25-35% for solidification, the non-woven fabric is dried at the temperature of 60-80 ℃ for 60-80 minutes, after the drying is finished, polyurethane coating slurry is uniformly coated, after the coating is finished, the non-woven fabric is dried at the temperature of 80-100 ℃ for 20-30 minutes, then the non-woven fabric is dried at the temperature of 100-120 ℃ for 10-20 minutes, then the non-woven fabric is placed in a dimethylformamide aqueous solution with the mass concentration of 25-35% for solidification, then the non-woven fabric is washed with warm water at the temperature of 30-40 ℃ for 30-50 minutes, finally the non-woven fabric is dried at the temperature of 130-150 ℃ for 5-10.

3. When the polyurethane dipping slurry and the polyurethane coating slurry are prepared, the hydrolysis-resistant auxiliary agent is added, so that the hydrolysis resistance of the synthetic leather can be improved, when the polyurethane coating slurry is prepared, the foaming agent is added, the occurrence of bubbles during film formation is prevented, the surface attractiveness and air permeability of the synthetic leather can be improved, and when the dry process surface layer slurry and the dry process bonding layer slurry are prepared, the wear-resistant agent is added, so that the wear resistance of the synthetic leather can be improved.

4. In the preparation process, the fluorine-containing raw material is not added, so that the environmental pollution is avoided, the preparation method is safe and environment-friendly, and the prepared synthetic leather has the advantages of attractive surface, good air permeability, large moisture permeability, wear resistance and hydrolysis resistance, and meets the processing requirements of sports shoes.

Detailed Description

The method for preparing the synthetic leather of the fluorine-free environment-friendly sports shoe material is described in more detail through a specific embodiment.

Example 1

A preparation method of fluorine-free environment-friendly synthetic leather for sports shoes comprises the following steps:

(1) preparing polyurethane dipping slurry:

a. weighing 60 parts of polyurethane resin, 80 parts of dimethylformamide, 80 parts of acetone, 0.5 part of sodium dodecyl benzene sulfonate, 2 parts of hydrolysis-resistant additive FK-1000.3 parts of color paste;

b. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 30 minutes, filtering and standing for later use;

(2) preparing polyurethane coating slurry:

c. weighing 100 parts of polyurethane resin, 80 parts of dimethylformamide, 40 parts of acetone, 0.8 part of sodium dodecyl benzene sulfonate, 0.3 part of hydrolysis-resistant assistant FK-1000.4 parts, 0.3 part of azodicarbonamide and 3 parts of color paste according to parts by weight;

d. adding the dimethyl formamide and the acetone in the formula amount into a formula kettle, stirring for 25 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the formula kettle, stirring for 40 minutes, then adding the foaming agent in the formula amount into the formula kettle, stirring for 50 minutes, filtering, standing for later use;

(3) and (3) wet bass production:

e. pouring the polyurethane dipping slurry prepared in the step (1) into a dipping tank, fully dipping the non-woven fabric into the dipping tank, then placing the non-woven fabric into a dimethylformamide water solution with the mass concentration of 25% for solidification, and drying at 60 ℃ for 80 minutes;

f. after drying, uniformly coating the polyurethane coating slurry prepared in the step (2), after coating, drying at 80 ℃ for 30 minutes, then drying at 100 ℃ for 20 minutes, then placing the polyurethane coating slurry into a dimethylformamide aqueous solution with the mass concentration of 25% for solidification, then washing with warm water at 30 ℃ for 50 minutes, finally drying at 130 ℃ for 10 minutes, and cooling to obtain wet-process bass;

(4) preparing dry-process surface layer slurry:

g. weighing 80 parts of polyurethane slurry, 10 parts of dimethylformamide, 5 parts of acetone, 4 parts of wear-resistant agent FT-3350.6 and 4 parts of color paste;

h. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 20 minutes, then adding the polyurethane slurry, the wear-resisting agent and the color paste in the formula amount into the material mixing kettle, stirring for 40 minutes, filtering and standing for later use;

(5) preparing dry bonding layer slurry:

i. weighing 100 parts of polyurethane slurry, 8 parts of dimethylformamide, 5 parts of acetone and 78 parts of wear-resisting agent FT-3351.0;

j. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 30 minutes, then adding the polyurethane slurry and the wear-resistant agent color paste in the formula amount into the material mixing kettle, stirring for 50 minutes, filtering, standing and reserving for later use;

(6) dry-process veneering production:

coating a layer of dry surface layer slurry prepared in the step (4) on release paper, drying at 60 ℃, coating a layer of dry bonding layer slurry prepared in the step (5), drying to be semi-dry at 80 ℃, attaching the humidity base prepared in the step (3), drying for 10 minutes at 130 ℃, and cooling to obtain a synthetic leather finished product;

(7) and (3) finished product detection and packaging:

and (4) inspecting the synthetic leather finished product prepared in the step (6) according to an inspection standard, and filling the qualified finished product into a packing box.

Example 2

A preparation method of fluorine-free environment-friendly synthetic leather for sports shoes comprises the following steps:

(1) preparing polyurethane dipping slurry:

a. weighing 80 parts of polyurethane resin, 90 parts of dimethylformamide, 70 parts of acetone, 0.8 part of polyoxyethylene laurate, 4 parts of hydrolysis-resistant additive FK-1000.4 and color paste according to parts by weight;

b. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 25 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 40 minutes, filtering and standing for later use;

(2) preparing polyurethane coating slurry:

c. weighing 120 parts of polyurethane resin, 70 parts of dimethylformamide, 60 parts of acetone, 0.5 part of polyoxyethylene laurate, 0.4 part of hydrolysis-resistant additive FK-1000.6 part of azodicarbonamide and 4 parts of color paste according to the weight parts;

d. adding the dimethyl formamide and the acetone in the formula amount into a formula kettle, stirring for 30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the formula kettle, stirring for 30 minutes, then adding the foaming agent in the formula amount into the formula kettle, stirring for 40 minutes, filtering, standing for later use;

(3) and (3) wet bass production:

e. pouring the polyurethane dipping slurry prepared in the step (1) into a dipping tank, fully dipping the non-woven fabric into the dipping tank, then placing the non-woven fabric into a dimethylformamide water solution with the mass concentration of 30% for solidification, and drying at 70 ℃ for 70 minutes;

f. after drying, uniformly coating the polyurethane coating slurry prepared in the step (2), drying at 90 ℃ for 25 minutes after coating, then drying at 110 ℃ for 15 minutes, then placing the polyurethane coating slurry into a dimethylformamide aqueous solution with the mass concentration of 30% for solidification, then washing with warm water at 35 ℃ for 40 minutes, finally drying at 140 ℃ for 8 minutes, and cooling to obtain wet-process bass;

(4) preparing dry-process surface layer slurry:

g. weighing 100 parts of polyurethane slurry, 15 parts of dimethylformamide, 10 parts of acetone, 0.8 part of wear-resistant agent DY-9238B and 2 parts of color paste according to parts by weight;

h. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 25 minutes, then adding the polyurethane slurry, the wear-resisting agent and the color paste in the formula amount into the material mixing kettle, stirring for 50 minutes, filtering and standing for later use;

(5) preparing dry bonding layer slurry:

i. weighing 120 parts of polyurethane slurry, 10 parts of dimethylformamide, 8 parts of acetone and 0.6 part of wear-resistant agent DY-9238B according to parts by weight;

j. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 25 minutes, then adding the polyurethane slurry and the wear-resistant agent color paste in the formula amount into the material mixing kettle, stirring for 40 minutes, filtering, standing and reserving for later use;

(6) dry-process veneering production:

coating a layer of dry surface layer slurry prepared in the step (4) on release paper, drying at 70 ℃, coating a layer of dry bonding layer slurry prepared in the step (5), drying to be semi-dry at 90 ℃, attaching the humidity base prepared in the step (3), drying for 8 minutes at 140 ℃, and cooling to obtain a synthetic leather finished product;

(7) and (3) finished product detection and packaging:

and (4) inspecting the synthetic leather finished product prepared in the step (6) according to an inspection standard, and filling the qualified finished product into a packing box.

Example 3

A preparation method of fluorine-free environment-friendly synthetic leather for sports shoes comprises the following steps:

(1) preparing polyurethane dipping slurry:

a. weighing 120 parts of polyurethane resin, 100 parts of dimethylformamide, 80 parts of acetone, 1.0 part of sodium dodecyl benzene sulfonate, 8 parts of hydrolysis-resistant additive FK-1000.6 parts of color paste;

b. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the material mixing kettle, stirring for 50 minutes, filtering and standing for later use;

(2) preparing polyurethane coating slurry:

c. weighing 150 parts of polyurethane resin, 90 parts of dimethylformamide, 50 parts of acetone, 1.0 part of sodium dodecyl benzene sulfonate, 0.5 part of hydrolysis-resistant assistant FK-1000.8 parts, and 8 parts of color paste;

d. adding the dimethyl formamide and the acetone in the formula amount into a formula kettle, stirring for 30 minutes, then adding the polyurethane resin, the surfactant, the hydrolysis-resistant auxiliary agent and the color paste in the formula amount into the formula kettle, stirring for 50 minutes, then adding the foaming agent in the formula amount into the formula kettle, stirring for 60 minutes, filtering, standing for later use;

(3) and (3) wet bass production:

e. pouring the polyurethane dipping slurry prepared in the step (1) into a dipping tank, fully dipping the non-woven fabric into the dipping tank, then placing the non-woven fabric into a dimethylformamide water solution with the mass concentration of 35% for solidification, and drying at 80 ℃ for 60 minutes;

f. after drying, uniformly coating the polyurethane coating slurry prepared in the step (2), after coating, drying at 100 ℃ for 20 minutes, then drying at 120 ℃ for 20 minutes, then placing the polyurethane coating slurry into a dimethylformamide aqueous solution with the mass concentration of 35% for solidification, then washing with warm water at 40 ℃ for 30 minutes, finally drying at 150 ℃ for 5 minutes, and cooling to obtain wet-process bass;

(4) preparing dry-process surface layer slurry:

g. weighing 120 parts of polyurethane slurry, 30 parts of dimethylformamide, 10 parts of acetone, 6 parts of wear-resistant agent FT-33501.0 and 6 parts of color paste;

h. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 30 minutes, then adding the polyurethane slurry, the wear-resisting agent and the color paste in the formula amount into the material mixing kettle, stirring for 60 minutes, filtering, standing and reserving for later use;

(5) preparing dry bonding layer slurry:

i. weighing 150 parts of polyurethane slurry, 15 parts of dimethylformamide, 6 parts of acetone and 78 parts of wear-resisting agent FT-3350.7;

j. adding the dimethyl formamide and the acetone in the formula amount into a material mixing kettle, stirring for 30 minutes, then adding the polyurethane slurry and the wear-resistant agent color paste in the formula amount into the material mixing kettle, stirring for 60 minutes, filtering, standing and reserving for later use;

(6) dry-process veneering production:

coating a layer of dry surface layer slurry prepared in the step (4) on release paper, drying at 80 ℃, coating a layer of dry bonding layer slurry prepared in the step (5), drying to be semi-dry at 100 ℃, attaching the humidity base prepared in the step (3), drying for 10 minutes at 150 ℃, and cooling to obtain a synthetic leather finished product;

(7) and (3) finished product detection and packaging:

and (4) inspecting the synthetic leather finished product prepared in the step (6) according to an inspection standard, and filling the qualified finished product into a packing box.

The synthetic leather prepared by the embodiments 1-3 has the advantages of beautiful surface, good air permeability, large moisture permeability, wear resistance and hydrolysis resistance, meets the processing requirements of sports shoes, does not add fluorine-containing raw materials in the preparation process, does not cause environmental pollution, and is safe and environment-friendly.