High-wear-resistance easy-to-clean synthetic leather and preparation method thereof

Abstract

The invention provides high-wear-resistance easy-to-clean synthetic leather. The high-wear-resistance easy-to-clean synthetic leather comprises a surface layer, a middle layer, a bottom layer and a substrate which are sequentially compounded, the surface layer comprises polycarbonate and a wear-resistant additive; the middle layer comprises polycarbonate and a wear-resistant additive; the bottom layer is made of polyether polyurethane resin; the substrate is made of a microfiber material or a space material; and the surface layer is treated by a water-based easy-to-clean treating agent. The polycarbonate is applied to the synthetic leather surface layer, the overall physical properties including impact resistance, tensile strength, bending strength and compression strength of the fabric can be improved, and the wear-resistant additive is combined, so that the smoothness of the surface of the fabric is improved, the resistance is reduced, and the wear resistance of the surface of the material is improved; finally, the water-based easy-to-clean treating agent is used for treating, so that the anti-pollution and easy-to-clean properties of the material are improved. The prepared synthetic leather is comfortable in hand feeling, natural textures are formed on the surface, the leather feeling is strong, the wrapping performance is strong, the wear resistance is high, and the easy-to-clean function is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of synthetic leather, and in particular to a highly wear-resistant and easy-to-clean synthetic leather and a preparation method thereof. Background Art

[0002] Shoes, as an indispensable necessity in life, are a tool designed by people to protect their feet from injury. As people pay more attention to health and outdoor life, the demand for sports shoes is increasing, and more professional sports shoes are gradually entering the shoe cabinets of non-professional athletes. Professional sports shoes can meet people's sports needs, provide better comfort and protection, so as to better experience the fun and passion of sports. For different types of sports, there are different requirements for the choice of shoes. For example, the upper of football shoes is generally made of soft, light, and wear-resistant materials, which helps players feel the touch of the ball and better control the direction and strength of the ball; tennis is a fierce sport, so strength and sports protection are the biggest design requirements for tennis shoes; basketball shoes need to be made of light, strong, and durable materials; running shoes need good breathability and folding resistance; life shoes are more comfortable; children's shoes need to be sufficiently breathable, wear-resistant, and soft and comfortable; outdoor protective shoes need to take into account waterproof and moisture permeability, wear resistance, and scratch resistance.

[0003] With the accelerated pace of life, the fast-paced lifestyle and work pressure, people are tired of dealing with housework. For shoes that are full of stains after wearing, people need a faster way to clean them. When traveling, coming back from get off work, or after exercise, they can easily deal with the stain problem on shoes, which can make life more convenient.

[0004] Therefore, there is a great demand for antifouling materials for shoes in the current market. Summary of the invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a highly wear-resistant and easy-to-clean synthetic leather and a preparation method thereof, wherein the prepared synthetic leather has the characteristics of being highly wear-resistant and easy to clean.

[0006] To achieve the above object, the present invention provides a highly wear-resistant and easy-to-clean synthetic leather, comprising: a top layer, a middle layer, a bottom layer and a base material which are compounded in sequence;

[0007] The surface layer includes polycarbonate and wear-resistant additive;

[0008] The middle layer includes polycarbonate and wear-resistant additives;

[0009] The bottom layer is polyether polyurethane;

[0010] The base material is microfiber material or space material;

[0011] The surface layer is treated with an aqueous easy-to-clean treatment agent.

[0012] The surface layer is the appearance surface of the highly wear-resistant and easy-to-clean synthetic leather.

[0013] Preferably, the preparation slurry of the surface layer comprises:

[0014] Polycarbonate: 80-120 parts by weight; dimethylformamide: 30-50 parts by weight; butanone: 15-25 parts by weight; color paste: 8-10 parts by weight; wear-resistant additive: 2-4 parts by weight.

[0015] In some specific embodiments of the present invention, the slurry for preparing the surface layer includes:

[0016] Polycarbonate: 100 parts by weight; dimethylformamide: 40 parts by weight; butanone: 20 parts by weight; color paste: 8-10 parts by weight; wear-resistant additive: 3 parts by weight.

[0017] The present invention uses polycarbonate as the surface layer. The polycarbonate is a thermoplastic resin containing —[ORO-CO]— links in the main molecular chain, also known as PC plastic.

[0018] Preferably, the polycarbonate is 2,2'-bis(4-hydroxyphenyl)propane polycarbonate, and the structural formula is as follows:

[0019]

[0020] n is the degree of polymerization.

[0021] The above polycarbonate can be synthesized from bisphenol A and carbon oxychloride (COCl2).

[0022] Preferably, the polycarbonate has a solid content of 30% and a modulus of 100 Kg / cm 2 .

[0023] The anti-wear additive is preferably TFM-1700.

[0024] The above-mentioned wear-resistant additive is a new type of powdered dispersant. The powdered wear-resistant additive has the advantages of no precipitation, good compatibility, and can increase the pigment coloring rate, increase wear resistance, scratch resistance and dry sliding performance, and does not affect the surface melting process of the shoe upper.

[0025] The addition ratio of the anti-wear additive is preferably 1.67wt%-5wt%, more preferably 3wt%.

[0026] When the wear-resistant additive is added at a ratio of 3%, the synthetic leather obtained by combining with the polycarbonate can have a TABER wear resistance of H-22 1KG / 40,000 revolutions, and a surface wear degree of less than or equal to level 2.

[0027] Preferably, the slurry for preparing the middle layer includes: polycarbonate: 80-120 parts by weight; dimethylformamide: 30-50 parts by weight; butanone: 15-25 parts by weight; color paste: 8-10 parts by weight; and wear-resistant additive: 2-4 parts by weight.

[0028] The composition of the middle layer is the same as that of the surface layer, which will not be described in detail here.

[0029] The provision of the middle layer helps to improve the wear resistance of the synthetic leather.

[0030] The base layer is preferably polyether polyurethane.

[0031] The solid content of the polyether polyurethane is preferably 40%, and the modulus is preferably 10-25Kg / cm 2 .

[0032] The above resin is selected to make the synthetic leather products feel softer and more comfortable.

[0033] Preferably, the preparation slurry of the bottom layer comprises:

[0034] Polyether polyurethane: 80-120 parts by weight; dimethylformamide: 15-25 parts by weight; butanone: 8-15 parts by weight; color paste: 3-8 parts by weight.

[0035] In some specific embodiments of the present invention, the preparation slurry of the bottom layer includes:

[0036] Polyether polyurethane: 100 parts by weight; dimethylformamide: 20 parts by weight; butanone: 10 parts by weight; color paste: 5 parts by weight.

[0037] The low boiling point solvent system is reduced in the above slurry, the solvent volatilization speed is reduced, and the grain pinhole abnormality caused by the solvent volatilization process can be reduced.

[0038] The present invention selects ultra-fiber material or space material as the base material of the synthetic leather to improve the supporting force and make the synthetic leather smoother.

[0039] The present invention uses an aqueous easy-to-clean treatment agent to treat the surface layer, so that the synthetic leather has easy-to-clean performance.

[0040] Preferably, the aqueous easy-to-clean treatment agent comprises, by mass content:

[0041] Waterborne polyurethane resin: 30%-35%; deionized water: 20%-25%; waterborne antifouling dispersant: 6%-8%; waterborne antifouling aid: 5%-7%; film-forming aid: 5%-8%; wetting and dispersing aid: 0.5%; thickener 0.5%-1%; defoamer: 0.3%-0.5%; matting agent: 0.3%-0.5%.

[0042] The waterborne polyurethane resin is preferably Asahikawa waterborne polyurethane: XCWB-3038.

[0043] The aqueous antifouling dispersant is preferably TEGO 5001.

[0044] The aqueous antifouling agent is preferably BYK-3720.

[0045] The film-forming aid is preferably propylene glycol methyl ether.

[0046] The wetting and dispersing aid is preferably TEGO 245.

[0047] The thickener is preferably an associative thickener: HYMES CVS-11.

[0048] The defoamer is preferably TEGO 825.

[0049] The matting agent is preferably TT-3600.

[0050] The present invention adopts the above hydrophilic easy-to-clean treatment agent, which does not contain silicon in its components, does not affect the adhesion fastness, and does not need to be polished when in contact with the outsole of the shoe. Its anti-fouling principle is: hydrophilic anti-fouling finishing is easy-to-remove finishing, or degreasing finishing. Through the hydrophilic anti-fouling finishing, the critical tension of the leather surface is reduced, the dirt on the leather becomes easy to fall off, and the re-pollution phenomenon during the washing process is improved.

[0051] The hydrophilic easy-cleaning treatment agent can promote water diffusion into the fabric, i.e., the fiber bundle and the interface between oil stain and fiber. When the interface and the fiber surface are hydrated, the oil stain can be separated from the fiber. When the fiber surface is treated with the hydrophilic easy-cleaning treatment agent to form an antifouling coating, water can diffuse through the water-based easy-cleaning treatment agent under the oil stain to separate the oil stain.

[0052] The present invention provides a method for preparing the above-mentioned highly wear-resistant and easy-to-clean synthetic leather, comprising the following steps:

[0053] The surface layer slurry, the middle layer slurry and the bottom layer slurry are sequentially coated on the surface of the release paper to form a composite surface layer, a middle layer and a bottom layer;

[0054] Laminating the bottom layer to a substrate;

[0055] The surface layer is treated with an aqueous easy-to-clean treatment agent.

[0056] Preferably, the surface layer slurry is prepared first.

[0057] The components of the surface layer slurry are the same as those of the surface layer preparation slurry mentioned above, and will not be repeated here.

[0058] Preferably, after the surface layer slurry is prepared, it is degassed in a vacuum degassing machine and set aside.

[0059] The viscosity of the surface layer slurry is preferably 2500-3000cps.

[0060] Then apply the surface layer.

[0061] The coating amount of the surface slurry is preferably 150-160g / m 2 The drying temperature is preferably 80-100°C, and the drying time is preferably 3-4 minutes.

[0062] Then prepare the middle layer slurry.

[0063] The components of the middle layer slurry are the same as those of the middle layer slurry prepared above, and will not be described in detail here.

[0064] Preferably, after the middle layer slurry is prepared, it is degassed in a vacuum degassing machine and then set aside.

[0065] The viscosity of the middle layer slurry is preferably 2500-3000 cps.

[0066] Then apply the middle layer.

[0067] The coating amount of the middle layer slurry is preferably 180-200 g / m 2 The drying temperature is preferably 80-100°C, and the drying time is preferably 3-4 minutes.

[0068] Then prepare the bottom slurry.

[0069] The components of the bottom layer slurry are the same as those of the bottom layer slurry prepared above, and will not be described in detail here.

[0070] Preferably, after the bottom layer slurry is prepared, it is degassed in a vacuum degassing machine and then set aside.

[0071] The coating amount of the bottom slurry is preferably 200-220 g / m 2 .

[0072] Preferably, the bottom slurry is dried at 120°C and 200 rpm until it is semi-dry and bonded to the substrate;

[0073] After lamination, the obtained composite material was dried in a 40m oven at a temperature gradient of 90, 100, 110, 120, 130, and 140°C at a speed of 6-7m / min.

[0074] The present invention utilizes a vacuum degassing machine to extract air from the slurry, thereby reducing pinholes caused by bubbles during coating.

[0075] The invention reduces the drying temperature of the fabric and reduces the pinholes on the film formation, while increasing the amount of the base material attached to the surface, making the polyurethane film-forming property better and improving the wear resistance of the product.

[0076] The resulting material is then surface treated.

[0077] The viscosity of the aqueous easy-to-clean treatment agent is preferably 1000-1500 cps.

[0078] Preferably, the surface layer is treated with an aqueous easy-to-clean treatment agent as follows:

[0079] The water-based easy-to-clean treatment agent is processed by a three-plate treatment machine with a 100-mesh wheel, compounded on the surface of the surface layer, and dried in a 25m oven at a temperature of 150-160°C and a speed of 8m / min.

[0080] The aqueous easy-to-clean treatment agent forms an antifouling coating on the surface of the surface layer, and the thickness of the antifouling coating is preferably 0.01-0.02 mm.

[0081] The highly wear-resistant and easy-to-clean synthetic leather material prepared by the present invention can not only meet the processing requirements, but also, compared with the traditional anti-fouling leather, does not require roughening when bonding the material to the outsole, which directly reduces the labor and time costs in the process and significantly increases the easy-to-clean performance, which is of great practical significance.

[0082] The highly wear-resistant and easy-to-clean synthetic leather can be used as a raw material for shoe uppers, especially sports shoe uppers, and can be used for high-demand basketball, football, tennis, running, daily life, children, and outdoor protective shoe series. This synthetic leather replaces traditional synthetic leather, which can reduce the difficulty of cleaning shoes, save time, and save material and labor costs during the production process. In terms of overall material texture and physical property requirements, it is more adaptable to meet human's yearning for a better life. The technical difficulty lies in the selection of various raw materials and the need to polish traditional anti-fouling leather. The following problems need to be solved during the material selection and production process:

[0083] 1. Fabric selection: The present invention selects dry, wear-resistant and scratch-resistant polycarbonate, and does not contain silicone oil products, thus avoiding the problem of stickiness during post-processing of sizing materials;

[0084] 2. Selection of anti-wear agent: The powdered anti-wear agent selected in the present invention has the characteristics of good dispersibility, no precipitation, good compatibility, and can improve the pigment coloring rate, increase the wear resistance, scratch resistance and dry sliding performance;

[0085] 3. Selection of easy-to-clean treatment agent. The present invention adopts a hydrophilic easy-to-clean treatment agent. The material does not contain silicon, does not affect the bonding fastness, and does not require polishing when in contact with the shoe outsole.

[0086] Compared with the prior art, the present invention provides a highly wear-resistant and easy-to-clean synthetic leather, comprising: a surface layer, a middle layer, a bottom layer and a base material which are compounded in sequence; the surface layer comprises polycarbonate and a wear-resistant additive; the middle layer comprises polycarbonate and a wear-resistant additive; the bottom layer is polyether polyurethane; the base material is a microfiber material or a space material; the surface layer is treated with an aqueous easy-to-clean treatment agent.

[0087] The present invention applies polycarbonate to the surface layer of synthetic leather, which can improve the overall physical properties of the fabric, including impact resistance, tensile strength, bending strength, and compression strength, and is combined with a wear-resistant additive to improve the smoothness of the fabric surface and reduce resistance to improve the wear resistance of the material surface. Finally, the material is treated with an aqueous easy-to-clean treatment agent to improve the anti-fouling and easy-to-clean performance. The synthetic leather prepared by the present invention has a comfortable feel, a natural texture formed on the surface, a strong leather feel, strong wrapping, high wear resistance, and has a certain easy-to-clean function for stains such as red wine, coffee, cola, juice, milk tea, soy sauce, tea, peanut oil, ketchup, yogurt, and soil. The product can be applied to high-demand basketball, football, tennis, running, life, children, outdoor protection and other shoe series.

[0088] The preparation process of the synthetic leather provided by the present invention adopts a dry process, and is obtained after dry coating, scraping, drying, and post-treatment. The preparation process is simple and easy to industrialize. DETAILED DESCRIPTION

[0089] In order to further illustrate the present invention, the highly wear-resistant and easy-to-clean synthetic leather and the preparation method thereof provided by the present invention are described in detail below in conjunction with the embodiments. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the invention.

[0090] All raw materials of the present invention have no particular limitation on their sources, and can be purchased from the market or prepared according to conventional methods known to those skilled in the art.

[0091] Example 1

[0092] 1) Fabric preparation

[0093] According to the weight components, 100 parts of polycarbonate, 40 parts of dimethylformamide, 20 parts of butanone, 8-10 parts of color paste, and 3 parts of wear-resistant additive TFM-1700 are selected and uniformly mixed to obtain fabric slurry for use;

[0094] 2) Fabric scraping

[0095] Pass the required release paper through the No. 1 coating head, and coat a layer of fabric slurry with a viscosity of 2500-3000cps on its surface. The coating amount is controlled at 150-160g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0096] 3) Preparation of intermediate material

[0097] According to the weight components, 100 parts of polycarbonate, 40 parts of dimethylformamide, 20 parts of butanone, 8-10 parts of color paste, and 3 parts of wear-resistant additive TF-1700 are selected, and the intermediate slurry is uniformly mixed and set aside;

[0098] 4) The release paper coated with the surface slurry prepared in step 2) is coated with a layer of medium slurry with a viscosity of 2500-3000cps through a No. 2 coating head, the coating amount is controlled at 180-200g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0099] 5) Preparation of base material

[0100] According to the weight components, 100 parts of polyether polyurethane, 20 parts of dimethylformamide, 10 parts of butanone and 5 parts of color paste are selected and evenly mixed to obtain a base material slurry with a viscosity of 12000-14000cps, which is then degassed in a vacuum degassing machine and set aside.

[0101] 6) Scraping of base material

[0102] The release paper coated with the surface slurry and the middle slurry is coated with the base slurry prepared in step 5) through the No. 3 coating head, and the coating amount is controlled at 200-220g / ㎡, and is dried in a 10-meter, 120-degree Celsius oven with air supply at 200 revolutions until semi-dry and then bonded to the microfiber base material. Then dry in a 40-meter oven at a temperature gradient of 90, 100, 110, 120, 130, 135, 140, and 140 degrees Celsius. The vehicle speed is set at 6-7m / min. After drying, the high-wear-resistant synthetic leather product is ready for use.

[0103] 7) Preparation of post-treatment slurry

[0104] By mass content:

[0105] Waterborne polyurethane resin Asahikawa waterborne polyurethane: XCWB-3038: 30%; waterborne antifouling dispersant TEGO 5001: 8%; waterborne antifouling additive BYK-3720: 7%; film-forming additive propylene glycol methyl ether: 5%; wetting and dispersing additive TEGO 245: 0.5%; associative thickener: Haimingsi CVS-11: 0.5%; defoaming agent TEGO 825: 0.5%; matting agent TT-3600: 0.5%; the balance is water.

[0106] The viscosity is 1000-1500 cps, and a post-processing slurry is obtained.

[0107] 8) Post-processing

[0108] The easy-to-clean treatment agent prepared in step 7) is treated on the semi-finished highly wear-resistant and easy-to-clean synthetic leather obtained in step 6) by a three-plate treatment machine with a 100-mesh wheel, and then dried in a 25m drying oven at a temperature of 150-160°C and a speed of 8m / min to obtain highly wear-resistant and easy-to-clean synthetic leather.

[0109] After testing, the anti-fouling performance is qualified and the wear resistance can reach H-22 / 1KG / 40000 revolutions, which meets the design requirements.

[0110] The wear resistance test and antifouling grade test are shown in Table 1-2 below.

[0111] Comparative Example 1

[0112] 1) Fabric preparation

[0113] Select Hexin polyurethane resin according to weight components: 100 parts of HX-6048, 40 parts of dimethylformamide, 20 parts of butanone, 8-10 parts of color paste, mix evenly to obtain fabric slurry for use;

[0114] 2) Fabric scraping

[0115] Pass the required release paper through the No. 1 coating head, and coat a layer of fabric slurry with a viscosity of 2500-3000cps on its surface. The coating amount is controlled at 150-160g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0116] 3) Preparation of intermediate material

[0117] According to the weight components, 100 parts of polycarbonate, 40 parts of dimethylformamide, 20 parts of butanone, and 8-10 parts of color paste are selected, and the intermediate slurry is uniformly mixed and then used for later use;

[0118] 4) The release paper coated with the surface slurry prepared in step 2) is coated with a layer of medium slurry with a viscosity of 2500-3000cps through a No. 2 coating head, the coating amount is controlled at 180-200g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0119] 5) Preparation of base material

[0120] According to the weight components, 100 parts of polyether polyurethane, 20 parts of dimethylformamide, 10 parts of butanone and 5 parts of color paste are selected and evenly mixed to obtain a base material slurry with a viscosity of 12000-14000cps, which is then degassed in a vacuum degassing machine and set aside.

[0121] 6) Scraping of base material

[0122] The release paper coated with the surface slurry and the middle slurry is coated with the base slurry prepared in step 5) through the No. 3 coating head, and the coating amount is controlled at 200-220g / ㎡, and is dried in a 10-meter, 120-degree Celsius oven with air supply of 200 revolutions until semi-dry and then bonded to the microfiber base material. Then, it is dried in a 40-meter oven at a temperature gradient of 90, 100, 110, 120, 130, 135, 140, and 140 degrees Celsius. The vehicle speed is set at 6-7m / min. After drying, a highly wear-resistant and easy-to-clean synthetic leather semi-finished product is obtained for standby use.

[0123] 7) Preparation of post-treatment slurry

[0124] By mass content:

[0125] Waterborne polyurethane resin Asahikawa waterborne polyurethane: XCWB-3038: 30%; waterborne antifouling dispersant TEGO 5001: 8%; waterborne antifouling additive BYK-3720: 7%; film-forming additive propylene glycol methyl ether: 5%; wetting and dispersing additive TEGO 245: 0.5%; associative thickener: Haimingsi CVS-11: 0.5%; defoaming agent TEGO 825: 0.5%; matting agent TT-3600: 0.5%; the balance is water.

[0126] The viscosity is 1000-1500 cps, and a post-processing slurry is obtained.

[0127] 8) Post-processing

[0128] The easy-to-clean treatment agent prepared in step 7) is treated on the semi-finished highly wear-resistant and easy-to-clean synthetic leather obtained in step 6) by a three-plate treatment machine with a 100-mesh wheel, and then dried in a 25m drying oven at a temperature of 150-160°C and a speed of 8m / min to obtain highly wear-resistant and easy-to-clean synthetic leather.

[0129] After testing, the anti-fouling performance is qualified, and the wear resistance only reaches H-22 / 1KG / 400 revolutions, which does not meet the design requirements.

[0130] The wear resistance test and antifouling grade test are shown in Table 1-2 below.

[0131] Example 3

[0132] 1) Fabric preparation

[0133] According to the weight components, 100 parts of polycarbonate, 40 parts of dimethylformamide, 20 parts of butanone, 8-10 parts of color paste, and 3 parts of wear-resistant additive TF-1700 are selected and uniformly mixed to obtain a fabric slurry for use;

[0134] 2) Fabric scraping

[0135] Pass the required release paper through the No. 1 coating head, and coat a layer of fabric slurry with a viscosity of 2500-3000cps on its surface. The coating amount is controlled at 150-160g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0136] 3) Preparation of intermediate material

[0137] According to the weight components, 100 parts of polycarbonate, 40 parts of dimethylformamide, 20 parts of butanone, 8-10 parts of color paste, and 3 parts of wear-resistant additive TFM-1700 are selected, and the intermediate slurry is uniformly mixed and set aside;

[0138] 4) The release paper coated with the surface slurry prepared in step 2) is coated with a layer of medium slurry with a viscosity of 2500-3000cps through a No. 2 coating head, the coating amount is controlled at 180-200g / ㎡, the drying temperature is controlled at 80-100 degrees Celsius, and the drying time is 3-4 minutes;

[0139] 5) Preparation of base material

[0140] According to the weight components, 100 parts of polyether polyurethane, 20 parts of dimethylformamide, 10 parts of butanone and 5 parts of color paste are selected and evenly mixed to obtain a base material slurry with a viscosity of 12000-14000cps, which is then degassed in a vacuum degassing machine and set aside.

[0141] 6) Scraping of base material

[0142] The release paper coated with the surface slurry and the middle slurry is coated with the base slurry prepared in step 5) through the No. 3 coating head, and the coating amount is controlled at 200-220g / ㎡, and is dried in a 10-meter, 120-degree Celsius oven with air supply at 200 revolutions until semi-dry and then bonded to the microfiber base material. Then, it is dried in a 40-meter oven at a temperature gradient of 90, 100, 110, 120, 130, 135, 140, and 140 degrees Celsius. The vehicle speed is set at 6-7m / min. After drying, a highly wear-resistant and easy-to-clean synthetic leather product is obtained.

[0143] After testing, the anti-fouling performance is unqualified, and the wear resistance can reach H-22 / 1KG / 40000 revolutions. It does not meet the design requirements.

[0144] The wear resistance test and antifouling grade test are shown in Table 1-2 below.

[0145] The wear resistance test method is as follows:

[0146] Clamp the sample on the sample fixture plate, lift the sample with a certain air pressure, use 320# sandpaper to repeatedly rub the sample surface moving back and forth for a certain number of times, and observe the wear of the sample surface;

[0147] Testing machine: Universal abrasion testing machine

[0148] After the sample has been rubbed a fixed number of times, observe the wear on the surface of the sample. If damage occurs, it is judged as unqualified, otherwise, it is judged as qualified.

[0149] Coated fabrics / synthetic leather: For coated fabrics and synthetic leather, the above wear standards are used. Since holes are a more extreme case and it is difficult for coated materials to have holes, we stipulate that the wear diameter of such materials reaches 1cm, which means that the sample is considered damaged.

[0150] Table 1 Comparison of wear resistance

[0151]

[0152] The anti-fouling grade test adopts the national standard GB / T 30159.1-2013 stain resistance (solid stain & liquid stain).

[0153] The antifouling grade test results are shown in Table 2 below:

[0154] Table 2 Antifouling grade test results

[0155]

[0156] In the above embodiments, Example 1 adds 3 parts of wear-resistant additive TF-1700 to the outer fabric and the middle material, and the fabric feels comfortable, has clear apparent texture, and has a strong leather feel. After testing, the anti-fouling performance is qualified, and the Taber wear-resistant H221kg 40,000 turns are qualified, which meets the design requirements. Example 2 does not add the wear-resistant additive TF-1700, and the texture of the obtained finished product is clear. Because no wear-resistant additive is added, the hand feel is relatively rough compared with the finished product prepared in Example 1. After testing, the Taber wear-resistant H-22 1kg only reaches 400 turns, which does not meet the design requirements. The finished product prepared in Example 3 has a clear texture and a comfortable surface feel. Because no anti-fouling treatment agent is used for post-treatment, the anti-fouling performance is unqualified after testing, and the Taber wear-resistant H-22 1kg 40,000 turns are qualified. It does not meet the design requirements.

[0157] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A highly wear-resistant and easy-to-clean synthetic leather, comprising: The top layer, middle layer, bottom layer and base material are compounded in sequence; The surface layer includes polycarbonate and wear-resistant additive; The middle layer includes polycarbonate and wear-resistant additives; The bottom layer is polyether polyurethane; The base material is microfiber material or space material; The surface layer is treated with an aqueous easy-to-clean treatment agent.

2. The highly wear-resistant and easy-to-clean synthetic leather according to claim 1, characterized in that: The aqueous easy-to-clean treatment agent comprises, by mass content: Waterborne polyurethane resin: 30%-35%; waterborne antifouling dispersant: 6%-8%; waterborne antifouling aid: 5%-7%; film-forming aid: 5%-8%; wetting and dispersing aid: 0.5%; thickener: 0.5%-1%; defoamer: 0.3%-0.5%; matting agent: 0.3%-0.5%; the balance is deionized water.

3. The highly wear-resistant and easy-to-clean synthetic leather according to claim 2, characterized in that: The waterborne polyurethane resin is selected from Asahikawa waterborne polyurethane: XCWB-3038; The aqueous antifouling dispersant is selected from TEGO 5001; The water-based antifouling agent is selected from BYK-3720; The film-forming aid is selected from propylene glycol methyl ether; The wetting and dispersing aid is selected from TEGO 245; The thickener is selected from associative thickeners: Haimingsi CVS-11; The defoamer is selected from TEGO 825; The matting agent is selected from TT-3600.

4. The highly wear-resistant and easy-to-clean synthetic leather according to claim 1, characterized in that: The preparation slurry of the surface layer comprises: Polycarbonate: 80-120 parts by weight; dimethylformamide: 30-50 parts by weight; butanone: 15-25 parts by weight; color paste: 8-10 parts by weight; wear-resistant additive: 2-4 parts by weight; The preparation slurry of the middle layer includes: Polycarbonate: 80-120 parts by weight; dimethylformamide: 30-50 parts by weight; butanone: 15-25 parts by weight; color paste: 8-10 parts by weight; wear-resistant additive: 2-4 parts by weight; The preparation slurry of the bottom layer includes: Polyether polyurethane: 80-120 parts by weight; dimethylformamide: 15-25 parts by weight; butanone: 8-15 parts by weight; color paste: 3-8 parts by weight.

5. The highly wear-resistant and easy-to-clean synthetic leather according to claim 1 or 4, characterized in that: The wear-resistant additive is selected from TFM-1700.

6. The highly wear-resistant and easy-to-clean synthetic leather according to claim 1, characterized in that: The polyether polyurethane resin has a solid content of 40% and a modulus of 10-25 Kg / cm 2 .

7. The method for preparing the highly wear-resistant and easy-to-clean synthetic leather according to any one of claims 1 to 6, comprising the following steps: The surface layer slurry, the middle layer slurry and the bottom layer slurry are sequentially coated on the surface of the release paper to form a composite surface layer, a middle layer and a bottom layer; Laminating the bottom layer to a substrate; The surface layer is treated with an aqueous easy-to-clean treatment agent.

8. The preparation method according to claim 7, characterized in that: The coating amount of the surface slurry is 150-160g / m 2 , drying temperature is 80-100℃, and drying time is 3-4min; The coating amount of the middle layer slurry is 180-200g / m 2 , drying temperature is 80-100℃, and drying time is 3-4min; The coating amount of the bottom slurry is 200-220g / m 2 .

9. The preparation method according to claim 7 or 8, characterized in that: The bottom slurry is dried at 120°C and 200 rpm until it is half dry and bonded to the base material; After lamination, the obtained composite material was dried in a 40m oven at a temperature gradient of 90, 100, 110, 120, 130, and 140°C at a speed of 6-7m / min.

10. The preparation method according to claim 7, characterized in that: The surface layer is treated with an aqueous easy-to-clean treatment agent as follows: The water-based easy-to-clean treatment agent is processed by a three-plate treatment machine with a 100-mesh wheel, compounded on the surface of the surface layer, and dried in a 25m oven at a temperature of 150-160°C and a speed of 8m / min.

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