CN113789672B - Polyurethane synthetic leather for outdoor sport casual shoes and preparation method thereof - Google Patents
Polyurethane synthetic leather for outdoor sport casual shoes and preparation method thereof Download PDFInfo
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
- D06N3/145—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes two or more layers of polyurethanes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/12—Permeability or impermeability properties
- D06N2209/121—Permeability to gases, adsorption
- D06N2209/123—Breathable
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
- D06N2209/12—Permeability or impermeability properties
- D06N2209/126—Permeability to liquids, absorption
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
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Abstract
The application discloses polyurethane synthetic leather for outdoor sport casual shoes and a preparation method thereof, wherein the preparation method comprises the following steps: providing a base fabric, wherein the base fabric is a single-sided porous H-velvet fabric base; performing gradient heating and drying on the surface of the base cloth by using Mao Tufu aqueous polyurethane slurry to obtain a first semi-finished product, wherein the aqueous polyurethane slurry contains CMC materials; padding the first semi-finished product to obtain a second semi-finished product; and carrying out surface treatment on the second semi-finished product to obtain the polyurethane synthetic leather for the outdoor sport casual shoes. The preparation method is environment-friendly in process, and the obtained outdoor sport casual shoe leather has excellent moisture permeability and air permeability.
Description
Technical Field
The application belongs to the technical field of polyurethane synthetic leather, and particularly relates to polyurethane synthetic leather for outdoor sport casual shoes and a preparation method thereof.
Background
Besides meeting the requirements of various physical indexes of the traditional shoe leather, the outdoor sports leisure shoe leather needs to have the performances of moisture permeability and air permeability due to the outdoor environment and the wearing specificity.
At present, conventional outdoor sport casual shoes are produced by adopting synthetic leather made of oily polyurethane coating and fabrics, have poor moisture permeability and air permeability, and have no environmental protection.
Disclosure of Invention
In view of the above, the present application is to provide a polyurethane synthetic leather for outdoor sport and leisure shoes, which forms a water-based polyurethane coating layer on the surface of a base cloth, and forms a plurality of uniform and regularly arranged micro-porous structures penetrating up and down on the inside and the surface of the water-based polyurethane coating layer, so that the obtained outdoor sport and leisure shoe leather has excellent moisture permeability and air permeability.
In order to achieve the above purpose, the present application adopts the following technical scheme:
the application provides a preparation method of polyurethane synthetic leather for outdoor sport casual shoes, which comprises the following steps:
providing a base fabric, wherein the base fabric is a single-sided porous H-velvet fabric base;
performing gradient heating and drying on the surface of the base cloth by using Mao Tufu aqueous polyurethane slurry to obtain a first semi-finished product, wherein the aqueous polyurethane slurry contains CMC materials;
padding the first semi-finished product to obtain a second semi-finished product;
and carrying out surface treatment on the second semi-finished product to obtain the polyurethane synthetic leather for the outdoor sport casual shoes.
Further, the single-sided porous H-velvet fabric base is a fabric with a porous structure, which is formed by braiding profiled fibers with the profiled degree of more than 60, and the thickness of the fabric is 0.8-0.9mm.
Further, the aqueous polyurethane slurry is prepared from 80-100 parts of deionized water, 20-40 parts of aqueous polyurethane, 4-6 parts of wetting penetrating agent, 3-6 parts of CMC material, 1-3 parts of foaming agent and 0-10 parts of aqueous color paste according to parts by mass;
the foaming density of the aqueous polyurethane slurry is 0.04-0.06g/cm 3 。
Further, in the first semi-finished product, the thickness of the aqueous polyurethane coating formed by gradient drying of the aqueous polyurethane slurry is 0.3-0.5mm.
Further, the gradient heating drying is finished by adopting three gradient ovens, wherein the length of the first gradient oven is 20-25m, and the temperature is 50-80 ℃; the length of the second gradient oven is 20-25m, and the temperature is 80-100 ℃; the length of the third gradient oven is 15-20m, and the temperature is 100-130 ℃.
Further, the padding treatment process specifically comprises the following steps: the padding water washing temperature is 70-90 ℃, the padding water washing times are 10-15 times, and the drying temperature is 130-150 ℃.
Further, the surface treatment includes a polishing treatment and a waterproofing treatment.
Further, the polishing treatment process specifically comprises the following steps: the abrasive paper has a mesh number of 360-600 meshes, the rotational speed of the grinding wheel is 2000-3000r/min, and the grinding speed is 10-15m/min.
Further, the waterproof treatment process specifically comprises the step of carrying out waterproof repair treatment on the surface by adopting waterproof slurry, wherein the surface roller mesh number is 200-300 meshes, the surface speed is 10-15m/min, and the drying temperature is 80-100 ℃, and the waterproof slurry is prepared from 80-100 parts of aqueous polyurethane resin, 0.5-1 part of nano-type organosilicon waterproof auxiliary agent, 0.1-0.3 part of emulsifying dispersant and 0-10 parts of aqueous color paste according to parts by weight.
The application further provides polyurethane synthetic leather for outdoor sport casual shoes, which is prepared by the preparation method according to any one of the above.
Compared with the prior art, the application has the following beneficial effects:
according to the application, the single-sided porous H-fleece base is used as the base cloth, and the base cloth can ensure that the base material has good moisture permeability and air permeability; then, coating a water-based polyurethane coating containing a carboxymethyl cellulose CMC material on the surface of the base cloth, and simultaneously forming a uniform porous water-based polyurethane coating on the surface of the base cloth by matching with a gradient drying processing technology, so as to avoid cracks on the surface of the water-based polyurethane due to rapid heating and uneven tension; and then removing CMC materials in the aqueous polyurethane slurry through padding treatment, and forming a plurality of uniformly and regularly arranged microporous structures which are vertically penetrated on the inner part and the surface of the aqueous polyurethane film, so that the polyurethane synthetic leather for the outdoor sport leisure shoes has excellent perspective air permeability.
Detailed Description
In order that the application may be readily understood, a more particular description of the application will be rendered by reference to specific embodiments that are illustrated below. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The application provides a preparation method of polyurethane synthetic leather for outdoor sport casual shoes, which comprises the following steps:
providing a base fabric, wherein the base fabric is a single-sided porous H-velvet fabric base;
performing gradient heating and drying on the surface of the base cloth by using Mao Tufu aqueous polyurethane slurry to obtain a first semi-finished product, wherein the aqueous polyurethane slurry contains CMC materials;
padding the first semi-finished product to obtain a second semi-finished product;
and carrying out surface treatment on the second semi-finished product to obtain the polyurethane synthetic leather for the outdoor sport casual shoes.
The application adopts the single-sided porous H-fleece base as the base cloth, and the perspective air permeability of the base cloth is primarily ensured due to the porous structure. The surface of the base cloth is coated with the aqueous polyurethane slurry, compared with the oily polyurethane slurry, the aqueous polyurethane slurry is more environment-friendly, but cracks are generated due to uneven tension of the aqueous polyurethane slurry when the aqueous polyurethane slurry is rapidly heated, so that the drying process of gradient heating drying is adopted, the cracks are avoided, and the integrity of the aqueous polyurethane coating is ensured. The CMC material is added in the aqueous polyurethane coating, and the CMC material is removed by padding treatment in the later stage by utilizing the characteristic of dissolution of the CMC material in hot water, so that a plurality of uniformly and regularly arranged and vertically through micropore structures are formed in the aqueous polyurethane coating and on the surface of the aqueous polyurethane coating, and the polyurethane synthetic leather for outdoor sport leisure shoes has excellent moisture permeability and air permeability. The surface of the polyurethane synthetic leather can be treated according to specific use environment requirements, so that the polyurethane synthetic leather meets the use requirements, such as waterproof performance requirements.
Further, the single-sided porous H-velvet fabric base is a fabric with a porous structure, which is formed by braiding special-shaped fibers with the special-shaped degree of more than 60, and the special-shaped fibers have good moisture absorption and ventilation performances, so that the moisture absorption and ventilation performances of polyurethane synthetic leather for outdoor sport casual shoes are further improved. Generally, the higher the degree of fiber profile, the larger the specific surface area of the fiber and the better the moisture absorption and air permeability, so the profile fiber with the profile degree of more than 60 is preferably adopted in the process, and more preferably, the profile degree of the profile fiber is between 65 and 80, so that on one hand, the excellent moisture absorption and air permeability performance is ensured, and on the other hand, the overall performance of the synthetic leather is balanced. The thickness of the single-sided porous H-fleece substrate is not particularly limited and may be adjusted according to the conventional substrate thickness in the art, and in one or more embodiments of the present application, the thickness is 0.8-0.9mm.
Further, the aqueous polyurethane slurry generally comprises an aqueous polyurethane main material, necessary auxiliary agents such as a foaming agent, and some other auxiliary agents for adjusting performance such as a wetting penetrating agent, color paste and the like, which can be the composition of the aqueous polyurethane slurry conventional in the art, can be adjusted according to specific physical property requirements of outdoor polyurethane synthetic leather, is not particularly limited, only needs to contain CMC materials, and the composition of the aqueous polyurethane slurry is found that the air permeability of the polyurethane synthetic leather is obviously improved along with the increase of CMC content, but the addition amount of the CMC materials is not excessive, otherwise, the physical property indexes of the synthetic leather are affected, so that the folding resistance, the peeling strength and the physical and mechanical properties of the product are drastically reduced, and therefore, in some embodiments of the application, the content of the CMC materials is preferably 2.5-4.5wt% of the aqueous polyurethane slurry. Further, in one or more embodiments of the present application, the aqueous polyurethane slurry is prepared from 80-100 parts of deionized water, 20-40 parts of aqueous polyurethane, 4-6 parts of wetting and penetrating agent, 3-6 parts of CMC material, 1-3 parts of foaming agent and 0-10 parts of aqueous color paste according to parts by mass.
The foaming density of the aqueous polyurethane slurry can be adjusted according to the requirement, the product performance can be adjusted by adjusting the foaming density, and in one or more embodiments of the application, the foaming density of the aqueous polyurethane slurry is 0.04-0.06g/cm 3 。
Further, in the first semi-finished product, the thickness of the aqueous polyurethane film formed by the gradient heating and drying of the aqueous polyurethane slurry may be adjusted according to the performance requirement of the product, so there is no particular limitation, and in one or more embodiments of the present application, the thickness of the aqueous polyurethane film is 0.3-0.5mm.
Further, the gradient heating drying in the application means that the drying temperature is gradually increased, generally at least three gradient heating steps are adopted, and the drying temperature can be adjusted according to different compositions of the aqueous polyurethane slurry, so long as the drying can be ensured, and the leather surface is not cracked. In practice, the drying of polyurethane synthetic leather is typically continuous, and therefore, in one or more embodiments of the present application, the gradient temperature-increasing drying is accomplished using a three-gradient oven, wherein the first gradient oven has a length of 20-25m and a temperature of 50-80 ℃; the length of the second gradient oven is 20-25m, and the temperature is 80-100 ℃; the length of the third gradient oven is 15-20m, and the temperature is 100-130 ℃.
Further, the purpose of the padding treatment in the application is to dissolve the CMC material in the aqueous polyurethane film so as to remove the CMC material, the padding temperature can be adjusted according to the CMC material, the aim of removing CMC without damaging the aqueous polyurethane film is ensured, and the padding times can be carried out for a plurality of times so as to fully remove the CMC material and dry the CMC material. In one or more embodiments of the present application, the padding treatment process specifically includes: the padding water washing temperature is 70-90 ℃, the padding water washing times are 10-15 times, and the drying temperature is 130-150 ℃.
Further, according to the performance requirements of the product, the application carries out corresponding surface treatment on the final product, thereby endowing the final product with specific performance requirements. In one or more embodiments of the application, the surface treatment includes a sanding treatment and a waterproofing treatment. Through polishing treatment, the surface of the aqueous polyurethane leather film forms a micro-velvet structure, so that the surface is fine and smooth and the touch feeling is comfortable; through the waterproof treatment, the product is endowed with waterproof performance.
Further, the polishing process of the present application may be a polishing process conventional in the art, which is not specifically described herein, and in one or more embodiments of the present application, the polishing process is specifically: the abrasive paper has a mesh number of 360-600 meshes, the rotational speed of the grinding wheel is 2000-3000r/min, and the grinding speed is 10-15m/min.
According to the technical scheme, the conventional polyurethane synthetic leather for outdoor sport leisure shoes is generally static waterproof, a fluorine-containing waterproof agent is generally adopted, the environment friendliness is poor, waterproof slurry containing the nano organosilicon waterproof auxiliary agent is preferably adopted to conduct waterproof treatment on the surface of a product, and an ultra-micro spherical lotus leaf effect is formed on the surface of the product, so that an excellent dynamic waterproof effect is achieved, and the process is environment-friendly. The waterproof treatment process specifically comprises the steps of adopting waterproof slurry to carry out waterproof repair treatment on the surface, wherein the surface roller mesh number is 200-300 meshes, the surface speed is 10-15m/min, and the drying temperature is 80-100 ℃, wherein the waterproof slurry is prepared from 80-100 parts of aqueous polyurethane resin, 0.5-1 part of nano-type organosilicon waterproof auxiliary agent, 0.1-0.3 part of emulsifying dispersant and 0-10 parts of aqueous color paste according to parts by weight.
The second aspect of the application provides polyurethane synthetic leather for outdoor sport casual shoes, which is prepared by the preparation method according to the first aspect of the application. The polyurethane synthetic leather for the outdoor sport casual shoes has excellent moisture absorption and air permeability.
The technical scheme of the application is more clearly and completely described below by combining specific examples and comparative examples.
The raw material information used in the following examples and comparative examples is specifically as follows:
aqueous polyurethane 5215, wanhua chemical group;
wetting penetrating agent LK-156, hefei blue Kai chemical technology Co., ltd;
foaming agent AN130PH, wanhua chemical group;
emulsion dispersant BYK-104, a product of BYK chemical company in Germany;
nanometer organosilicon waterproof additive LK-606, hefei blue Kai chemical engineering Co., ltd.
It should be understood that the above raw material information is only an example for making the technical solution in the embodiments clearer, and it is not representative that the present application can only use the above raw materials, and other raw materials capable of achieving the same technical effect may be used in the present application, and the scope of the claims is specifically defined.
Example 1
Providing a single-sided porous H-velvet fabric base with the thickness of 0.8mm, wherein the single-sided porous H-velvet fabric base is a fabric woven into a porous structure by adopting special-shaped fibers (special-shaped degree 65) with good moisture absorption and air permeability as raw materials;
the preparation method comprises the steps of (1) along Mao Tufu a water-based polyurethane slurry on the surface of a single-sided porous tissue H flannelette base, and then gradually drying through a first gradient oven (length 20m, temperature 50 ℃), a second gradient oven (length 20m, temperature 80 ℃) and a third gradient oven (length 15m, temperature 100 ℃) in sequence to form a uniform porous water-based polyurethane film with thickness of 0.3mm, so as to obtain a first semi-finished product; wherein the foaming density of the aqueous polyurethane slurry is 0.055g/cm 3 It consists of 80 parts of H 2 O, 20 parts of aqueous polyurethane, 3 parts of wetting penetrating agent, 3 parts of CMC material, 1 part of foaming agent and 2 parts of aqueous color paste according to parts by mass;
padding the first semi-finished product with warm water at 75 ℃ for 10 times, removing CMC particles in the aqueous polyurethane slurry, and drying at 130 ℃ to obtain a second semi-finished product;
carrying out fine polishing treatment (the number of sand paper is 500 meshes, the number of grinding wheel revolutions is 2000 revolutions per minute, and the grinding speed is 12 m/minute) on the surface of the coating of the second semi-finished product, so that a micro-velvet structure is formed on the surface of the coating; and then carrying out surface restoration treatment (the surface roller number is 200 meshes, the surface speed is 10m/min, and the drying temperature is 80 ℃) by adopting nano organic silicon waterproof auxiliary agent slurry (80 parts of water-based polyurethane resin, 0.5 part of nano organic silicon waterproof auxiliary agent, 0.1 part of emulsifying dispersant and 4 parts of water-based color paste) to obtain the polyurethane synthetic leather for the outdoor sport leisure shoes.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the embodiment is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 3.9Kg/cm; air permeability: 1.3 mg/(cm) 2 H); waterproof (anti-siphon): 0.5cm/2h. The polyurethane synthetic leather for the outdoor sport leisure shoes does not contain perfluorooctanoic acid (PFCs, PFOS), has excellent environmental protection performance, and has comfortable and fine surface touch feeling.
Example 2
Providing a single-sided porous H-velvet fabric base with the thickness of 0.8mm, wherein the single-sided porous H-velvet fabric base is a fabric woven into a porous structure by adopting special-shaped fibers (special-shaped degree 70) with good moisture absorption and air permeability as raw materials;
the preparation method comprises the steps of (1) along Mao Tufu a water-based polyurethane slurry on the surface of a single-sided porous tissue H flannelette base, and then gradually drying through a first gradient oven (length 20m, temperature 50 ℃), a second gradient oven (length 20m, temperature 80 ℃) and a third gradient oven (length 15m, temperature 100 ℃) in sequence to form a uniform porous water-based polyurethane film with thickness of 0.35mm, so as to obtain a first semi-finished product; wherein the foaming density of the aqueous polyurethane slurry is 0.05g/cm 3 It consists of 90 parts of H 2 O, 20 parts of aqueous polyurethane, 3 parts of wetting penetrating agent, 4 parts of CMC material, 1.5 parts of foaming agent and 3 parts of aqueous color paste according to parts by mass;
the first semi-finished product is subjected to padding and water washing for 12 times by warm water at 80 ℃, CMC particles in the aqueous polyurethane slurry are removed, and then the second semi-finished product is obtained by drying at 130 ℃;
carrying out fine polishing treatment (the number of sand paper is 500 meshes, the number of grinding wheel revolutions is 2000 revolutions per minute, and the grinding speed is 10 m/min) on the surface of the coating of the second semi-finished product, so that a micro-velvet structure is formed on the surface of the coating; and then carrying out surface restoration treatment (the surface roller number is 300 meshes, the surface speed is 15m/min, and the drying temperature is 100 ℃) by adopting nano organic silicon waterproof auxiliary agent slurry (80 parts of water-based polyurethane resin, 0.7 part of nano organic silicon waterproof auxiliary agent, 0.1 part of emulsifying dispersant and 3 parts of water-based color paste) to obtain the polyurethane synthetic leather for the outdoor sport leisure shoes.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the embodiment is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 3.5Kg/cm; air permeability: 1.6 mg/(cm) 2 H); waterproof (anti-siphon): 0.5cm/2h. The polyurethane synthetic leather for the outdoor sport leisure shoes does not contain perfluorooctanoic acid (PFCs, PFOS), has excellent environmental protection performance, and has comfortable and fine surface touch feeling.
Example 3
Providing a single-sided porous H-velvet fabric base with the thickness of 0.9mm, wherein the single-sided porous H-velvet fabric base is a fabric woven into a porous structure by adopting special-shaped fibers (special-shaped degree 80) with good moisture absorption and air permeability as raw materials;
the preparation method comprises the steps of (1) along Mao Tufu aqueous polyurethane slurry on the surface of a single-sided porous tissue H flannelette base, and then gradually drying through a first gradient oven (length 25m, temperature 60 ℃), a second gradient oven (length 20m, temperature 100 ℃) and a third gradient oven (length 15m, temperature 120 ℃) in sequence to form a uniform porous aqueous polyurethane film with thickness of 0.45mm, so as to obtain a first semi-finished product; wherein the foaming density of the aqueous polyurethane slurry is 0.04g/cm 3 It consists of 100 parts of H 2 The aqueous polyurethane foam is prepared from the following components by mass part, namely O, 25 parts of aqueous polyurethane, 5 parts of wetting penetrating agent, 6 parts of CMC material, 3 parts of foaming agent and 2 parts of aqueous color paste;
the first semi-finished product is subjected to padding and water washing for 12 times by warm water at 80 ℃, CMC particles in the aqueous polyurethane slurry are removed, and then the second semi-finished product is obtained by drying at 140 ℃;
carrying out fine polishing treatment (the number of sand paper is 600 meshes, the number of grinding wheel revolutions is 2500 turns/min, and the grinding speed is 12 m/min) on the surface of the coating of the second semi-finished product, so that a micro-velvet structure is formed on the surface of the coating; and then carrying out surface restoration treatment (the surface roller number is 250, the surface speed is 12m/min, and the drying temperature is 90 ℃) by adopting nano organic silicon waterproof auxiliary agent slurry (80 parts of water-based polyurethane resin, 0.8 part of nano organic silicon waterproof auxiliary agent, 0.2 part of emulsifying dispersant and 3 parts of water-based color paste) to obtain the polyurethane synthetic leather for the outdoor sport leisure shoes.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the embodiment is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 3.2Kg/cm; air permeability: 2.0 mg/(cm) 2 H); waterproof (anti-siphon): 0.6cm/2h. The polyurethane synthetic leather for the outdoor sport leisure shoes does not contain perfluorooctanoic acid (PFCs, PFOS), has excellent environmental protection performance, and has comfortable and fine surface touch feeling.
Comparative example 1
The present comparative example uses the same embodiment as in example 1, except that: the aqueous polyurethane slurry consists of 80 parts of H 2 O, 20 parts of aqueous polyurethane, 3 parts of wetting penetrating agent, 1 part of foaming agent and 2 parts of aqueous color paste according to parts by mass.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the comparative example is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 4.2Kg/cm; air permeability: 0.2 mg/(cm) 2 H); waterproof (anti-siphon): 0.6cm/2h.
Comparative example 2
The present comparative example uses the same embodiment as in example 1, except that: the aqueous polyurethane slurry consists of 80 parts of H 2 O, 20 parts of aqueous polyurethane, 3 parts of wetting penetrating agent, 8 parts of CMC material, 1 part of foaming agent and 2 parts of aqueous color paste according to parts by mass.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the comparative example is flexible at normal temperature: 10 ten thousand times of flex leather surface cracking; wear resistance: taber H-22 x 1kg x 500 revolutions, leather surface rupture; peel strength: 2.5Kg/cm; air permeability: 3.0 mg/(cm) 2 H); waterproof (anti-siphon): 2.6cm/2h。
Comparative example 3
The present comparative example uses the same embodiment as in example 1, except that: the mixture was dried in this order in a first gradient oven (length: 20m, temperature: 100 ℃ C.), a second gradient oven (length: 20m, temperature: 100 ℃ C.), and a third gradient oven (length: 15m, temperature: 100 ℃ C.) to form a uniform porous aqueous polyurethane film having a thickness of 0.3 mm.
In the comparative example, as the gradient drying process is not adopted, the initial temperature is too high, so that the surface of the waterborne polyurethane is heated rapidly, cracks are generated due to uneven tension, the leather surface cracks, and a normal product cannot be formed.
Comparative example 4
The present comparative example uses the same embodiment as in example 1, except that: the waterproof slurry in the comparative example is prepared from 80 parts of aqueous polyurethane resin, 1.0 part of fluorine-free waterproof agent WP-NF10 (Jin Hu auxiliary agent), 0.1 part of emulsifying dispersant and 4 parts of aqueous color paste.
Through tests, the polyurethane synthetic leather for the outdoor sport casual shoes obtained in the comparative example is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 3.5Kg/cm; air permeability: 1.5 mg/(cm) 2 H); waterproof (anti-siphon): 6.0cm/2h.
As can be seen from examples 1, 2 and 3 and comparative examples 1 and 2, the addition of CMC materials can significantly improve the moisture permeability and air permeability of polyurethane synthetic leather, and as the mass fraction of CMC in the aqueous polyurethane material increases, the air permeability of the product gradually increases, but too much is not preferred, otherwise the folding endurance, the peeling strength and the physical and mechanical properties of the product are drastically reduced. From comparative example 3, it can be seen that the aqueous polyurethane resin coated on the surface of the cloth substrate does not adopt a novel processing technology with gradient temperature, so that the surface of the aqueous polyurethane with overhigh initial temperature is heated rapidly, cracks and leather surface cracks are generated due to uneven tension, and normal products cannot be formed. As can be seen from comparative example 4, if a fluorine-free waterproofing agent is adopted, although the waterproof effect can be achieved, the waterproof effect is static waterproof, and the nano organosilicon waterproof auxiliary agent in the application forms an ultra-micro spherical lotus leaf effect on the surface of the product, so that the excellent dynamic waterproof effect is achieved, and the process is environment-friendly.
Example 4
Providing a single-sided porous H-velvet fabric base with the thickness of 0.8mm, wherein the single-sided porous H-velvet fabric base is a fabric woven into a porous structure by adopting special-shaped fibers (special-shaped degree 70) with good moisture absorption and air permeability as raw materials;
the preparation method comprises the steps of (1) along Mao Tufu aqueous polyurethane slurry on the surface of a single-sided porous tissue H flannelette base, and then gradually drying through a first gradient oven (length 25m, temperature 60 ℃), a second gradient oven (length 25m, temperature 90 ℃) and a third gradient oven (length 20m, temperature 110 ℃) in sequence to form a uniform porous aqueous polyurethane film with thickness of 0.4mm, so as to obtain a first semi-finished product; wherein the foaming density of the aqueous polyurethane slurry is 0.06g/cm 3 It consists of 80 parts of H 2 O, 30 parts of waterborne polyurethane, 4 parts of wetting penetrating agent, 5.4 parts of CMC material and 1 part of foaming agent according to parts by mass;
the first semi-finished product is subjected to padding and water washing for 10 times by warm water at 90 ℃, CMC particles in the aqueous polyurethane slurry are removed, and then the second semi-finished product is obtained by drying at 150 ℃;
carrying out fine polishing treatment (the number of sand paper is 500 meshes, the number of grinding wheel revolutions is 2000 revolutions per minute, and the grinding speed is 10 m/min) on the surface of the coating of the second semi-finished product, so that a micro-velvet structure is formed on the surface of the coating; and then carrying out surface restoration treatment by adopting nano organosilicon waterproof auxiliary agent slurry (90 parts of waterborne polyurethane resin, 1.0 part of nano organosilicon waterproof auxiliary agent and 0.2 part of emulsifying dispersant) to obtain the polyurethane synthetic leather for the outdoor sport leisure shoes.
Example 5
Providing a single-sided porous H-velvet fabric base with the thickness of 0.85mm, wherein the single-sided porous H-velvet fabric base is a fabric woven into a porous structure by adopting special-shaped fibers (special-shaped degree 75) with good moisture absorption and air permeability as raw materials;
on the surface of the single-sided porous H-flannelette base, mao Tufu water-based polyurethane is preparedThe ester slurry is then gradually dried by a first gradient oven (length 22m, temperature 80 ℃) and a second gradient oven (length 22m, temperature 100 ℃) and a third gradient oven (length 18m, temperature 130 ℃) in sequence to form a uniform porous water-based polyurethane film with thickness of 0.5mm, and a first semi-finished product is obtained; wherein the foaming density of the aqueous polyurethane slurry is 0.06g/cm 3 It consists of 100 parts of H 2 O, 40 parts of aqueous polyurethane, 6 parts of wetting penetrating agent, 4 parts of CMC material, 3 parts of foaming agent and 10 parts of aqueous color paste according to parts by mass;
padding the first semi-finished product with warm water at 70 ℃ for 15 times, removing CMC particles in the aqueous polyurethane slurry, and drying at 140 ℃ to obtain a second semi-finished product;
carrying out fine polishing treatment (the number of sand paper is 500 meshes, the number of grinding wheel revolutions is 2000 revolutions per minute, and the grinding speed is 10 m/min) on the surface of the coating of the second semi-finished product, so that a micro-velvet structure is formed on the surface of the coating; and then carrying out surface restoration treatment by adopting nano organic silicon waterproof auxiliary agent slurry (100 parts of waterborne polyurethane resin, 0.5 part of nano organic silicon waterproof auxiliary agent, 0.3 part of emulsifying dispersant and 10 parts of waterborne color paste) to obtain the polyurethane synthetic leather for the outdoor sport leisure shoes.
The test shows that the polyurethane synthetic leather for the outdoor sport casual shoes in the embodiment 4 and the embodiment 5 has the similar performance as the embodiment 1-3, and the polyurethane synthetic leather is flexible at normal temperature: 10 ten thousand times of bending the leather surface does not crack; wear resistance: taber H-22 x 1KG x 500 turns, the leather surface is not broken; peel strength: 3-4Kg/cm; air permeability: 1.5-2.0 mg/(cm) 2 H); waterproof (anti-siphon): 0.4-0.6cm/2h. And the product does not contain perfluoro caprylic acid (PFCs and PFOS), has excellent environmental protection performance, and has comfortable and fine touch feeling on the surface of the product.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (7)
1. The preparation method of the polyurethane synthetic leather for the outdoor sport leisure shoes is characterized by comprising the following steps of:
providing a base cloth, wherein the base cloth is a single-sided porous H-velvet base, and the single-sided porous H-velvet base is a fabric with a porous structure, which is formed by braiding profiled fibers with a profiled degree of more than 60, and has a thickness of 0.8-0.9mm;
performing gradient heating drying on the surface of the base cloth by using Mao Tufu aqueous polyurethane slurry to obtain a first semi-finished product, wherein the aqueous polyurethane slurry contains 2.5-4.5wt% of CMC (CMC) material, the gradient heating drying is completed by adopting three gradient ovens, the length of the first gradient oven is 20-25m, and the temperature is 50-80 ℃; the length of the second gradient oven is 20-25m, and the temperature is 80-100 ℃; the length of the third gradient oven is 15-20m, and the temperature is 100-130 ℃;
padding the first semi-finished product to obtain a second semi-finished product, wherein the padding process specifically comprises the following steps: the padding water washing temperature is 70-90 ℃, the padding water washing times are 10-15, and the drying temperature is 130-150 ℃;
and carrying out surface treatment on the second semi-finished product to obtain the polyurethane synthetic leather for the outdoor sport casual shoes.
2. The preparation method of claim 1, wherein the aqueous polyurethane slurry is prepared from 80-100 parts of deionized water, 20-40 parts of aqueous polyurethane, 4-6 parts of wetting penetrating agent, 3-6 parts of CMC material, 1-3 parts of foaming agent and 0-10 parts of aqueous color paste according to parts by mass;
the foaming density of the aqueous polyurethane slurry is 0.04-0.06g/cm 3 。
3. The method according to claim 1, wherein the aqueous polyurethane slurry is gradient-dried to form an aqueous polyurethane film having a thickness of 0.3 to 0.5mm in the first semi-finished product.
4. The method of manufacturing according to claim 1, wherein the surface treatment includes a polishing treatment and a waterproofing treatment.
5. The method according to claim 4, wherein the polishing process comprises the following steps: the abrasive paper has a mesh number of 360-600 meshes, the rotational speed of the grinding wheel is 2000-3000r/min, and the grinding speed is 10-15m/min.
6. The preparation method of claim 4, wherein the waterproof treatment process is specifically to carry out waterproof repair treatment on the surface by adopting waterproof slurry, wherein the surface roller number is 200-300 meshes, the surface speed is 10-15m/min, and the drying temperature is 80-100 ℃, and the waterproof slurry is prepared from 80-100 parts of aqueous polyurethane resin, 0.5-1 part of nano-type organosilicon waterproof auxiliary agent, 0.1-0.3 part of emulsifying dispersant and 0-10 parts of aqueous color paste according to parts by weight.
7. A polyurethane synthetic leather for outdoor sport casual shoes, characterized in that it is prepared by the preparation method according to any one of claims 1 to 6.
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