CN110983809A - Preparation process of high-simulation full-aqueous microfiber leather - Google Patents
Preparation process of high-simulation full-aqueous microfiber leather Download PDFInfo
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- CN110983809A CN110983809A CN201911332835.6A CN201911332835A CN110983809A CN 110983809 A CN110983809 A CN 110983809A CN 201911332835 A CN201911332835 A CN 201911332835A CN 110983809 A CN110983809 A CN 110983809A
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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
-
- 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
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
-
- 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
- D06N3/0075—Napping, teasing, raising or abrading of the resin coating
-
- 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
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
-
- 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
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
-
- 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
- D06N3/04—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 by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/042—Acrylic polymers
-
- 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
Abstract
The invention discloses a preparation process of high-simulation full-aqueous microfiber leather, which comprises the following steps: s1, repairing the wound: uniformly coating the repairing paste on the surface of the microfiber leather bass; s2, buffing: passing the repaired microfiber leather bass through a leather grinding machine to grind off the repairing paste on the surface; s3, bottom sealing: after buffing, coating a layer of resin on the surface of the microfiber leather bass; s4, ironing: the surface of the microfiber leather bass is polished; thus facilitating subsequent direct coating; s5, roller bottom coating: uniformly coating the prepared roller priming paint on the surface of the microfiber leather bass; s6, embossing: embossing the surface of the microfiber leather bass coated at the bottom of the roller by a roller embossing machine; s7, guniting: and spraying slurry on the embossed microfiber leather bass surface. The preparation process is a full-aqueous direct coating process and has the following advantages: 1. saving centrifugal paper; 2. the consumption of chemical materials is reduced; 3. the process is full of water and has no pollution.
Description
Technical Field
The invention relates to the technical field of microfiber leather preparation, in particular to a preparation process of high-simulation full-aqueous microfiber leather.
Background
The traditional technological process of microfiber leather (i.e. microfiber synthetic leather) generally adopts a release paper transfer method, namely firstly coating chemical materials for coating on release paper with texture in a roller coating or blade coating mode, namely a surface layer, a middle layer and a bonding layer, after the three layers are coated, bonding the microfiber and the chemical materials in a bonding mode under a certain pressure, drying at high temperature, finally peeling off the release paper, and rolling to obtain the finished product.
However, the preparation process of the microfiber leather in the prior art has the following problems:
1. the traditional process adopts a release paper transfer process to cause waste of release paper, and the release paper is required to be used because the process is a process of transferring a coating layer by the release paper;
2. the chemical materials (chemical raw materials) are wasted, and the consumption of the chemical materials is generally controlled to be 40-50G/SF because certain detection requirements are required to be met and the chemical materials can be uniformly coated on release paper;
3. the traditional process is not environment-friendly, and because the chemical material is not directly combined with the base material, the chemical material is firstly coated on the release paper, and some solvents such as DMF and the like are required to be used for uniformly coating the chemical material on the release paper.
Based on the situation, the invention provides a preparation process of high-simulation full-aqueous microfiber leather, which can effectively solve the problems.
Disclosure of Invention
Based on the waste and pollution problems of the traditional process, the preparation process of the high-simulation full-aqueous microfiber leather disclosed by the invention is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a preparation process of high-simulation full-aqueous microfiber leather comprises the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 2-20 g/sq.ft or 20-200 g/m2, the conveying speed is controlled to be 5-20 m/min, the gap is controlled to be 0.4-1.5 mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 50-150 ℃;
s2, buffing:
the repaired microfiber leather bass is passed through a leather grinding machine to grind off the repairing paste on the surface, abrasive paper used for grinding leather is controlled between 180 and 1000#, and the conveying speed is controlled between 5 and 15 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of microfiber leather bass, wherein the coating amount is controlled to be 1-8 g/sq.ft or 10-80 g/m2, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 50-150 ℃, and the conveying speed is controlled to be 5-20 m/min;
s4, ironing:
under the conditions that the temperature is 50-150 ℃ and the pressure is 50-150 kg, the surface of the microfiber leather bass is subjected to ironing; thus facilitating subsequent direct coating;
s5, roller bottom coating:
uniformly coating the prepared roller priming coating material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass under the condition that the consistency is 30-100 seconds in a #4 Ford quilt, drying in an oven with the temperature set at 100-180 ℃, and rolling;
the prepared roller priming coating material, namely chemical synthetic leather slurry, is commonly used in the field, and is a surface material of microfiber leather. The kind and amount of the roller bottom coating compound can be determined by those skilled in the art according to the required color and the requirement of the detection standard, for example, some polyurethane resins with light resistance, folding resistance and hydrolysis and aging resistance are used for adjusting the formula, and the corresponding roller bottom coating compound is obtained by mixing according to the formula.
S6, embossing:
embossing the surface of the microfiber leather bass coated on the bottom of the roller by using a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 80-180 ℃, the pressure is controlled to be 100-300 kg and the conveying speed is 2-5 m/min;
the embossing is carried out by a roller embossing machine, and the person skilled in the art can carry out embossing according to the required lines to obtain the required lines.
S7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled to be 5-20 m/min, and the drying temperature is controlled to be 80-180 ℃.
The kind and amount of the guniting compound can be determined by those skilled in the art according to the required color, touch, gloss and detection standard, such as polyurethane resin which is fully aqueous and has wear resistance, light resistance, rubbing color fastness and stain resistance.
The preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
Preferably, in step S3, the resin is a back cover material, specifically, an alkali-acid-resistant aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, and resistance to jungle tests (90 ℃, 95 humidity) for 168 × 5 hours or more.
Preferably, in step S5, the roller bottom coating compound is a full-aqueous polyurethane synthetic leather slurry or an acrylic resin synthetic leather slurry with high temperature light aging resistance, hydrolysis resistance, folding resistance, high adhesion and extensibility.
Preferably, in step S7, the guniting slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high-temperature light aging resistance, high wear resistance, color fastness resistance and stain resistance.
Preferably, in step S1, the repair paste is uniformly applied to the surface of the microfiber leather base by roll coating or knife coating.
Preferably, in step S3, after buffing, the microfiber leather bass surface is coated with a layer of resin by spraying or roll coating.
The invention also provides high-simulation full-aqueous microfiber leather prepared by the preparation process.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
The high-simulation full-aqueous microfiber leather disclosed by the invention adopts an environment-friendly aqueous microfiber base material and a leather finishing and surfacing process, and has higher simulation.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a preparation process of high-simulation full-aqueous microfiber leather comprises the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 2-20 g/sq.ft or 20-200 g/m2, the conveying speed is controlled to be 5-20 m/min, the gap is controlled to be 0.4-1.5 mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 50-150 ℃;
s2, buffing:
the repaired microfiber leather bass is passed through a leather grinding machine to grind off the repairing paste on the surface, abrasive paper used for grinding leather is controlled between 180 and 1000#, and the conveying speed is controlled between 5 and 15 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of microfiber leather bass, wherein the coating amount is controlled to be 1-8 g/sq.ft or 10-80 g/m2, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 50-150 ℃, and the conveying speed is controlled to be 5-20 m/min;
s4, ironing:
under the conditions that the temperature is 50-150 ℃ and the pressure is 50-150 kg, the surface of the microfiber leather bass is subjected to ironing; thus facilitating subsequent direct coating;
s5, roller bottom coating:
uniformly coating the prepared roller priming coating material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass under the condition that the consistency is 30-100 seconds in a #4 Ford quilt, drying in an oven with the temperature set at 100-180 ℃, and rolling;
the prepared roller priming coating material, namely chemical synthetic leather slurry, is commonly used in the field, and is a surface material of microfiber leather. The kind and amount of the roller bottom coating compound can be determined by those skilled in the art according to the required color and the requirement of the detection standard, for example, some polyurethane resins with light resistance, folding resistance and hydrolysis and aging resistance are used for adjusting the formula, and the corresponding roller bottom coating compound is obtained by mixing according to the formula.
S6, embossing:
embossing the surface of the microfiber leather bass coated on the bottom of the roller by using a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 80-180 ℃, the pressure is controlled to be 100-300 kg and the conveying speed is 2-5 m/min;
the embossing is carried out by a roller embossing machine, and the person skilled in the art can carry out embossing according to the required lines to obtain the required lines.
S7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled to be 5-20 m/min, and the drying temperature is controlled to be 80-180 ℃.
The kind and amount of the guniting compound can be determined by those skilled in the art according to the required color, touch, gloss and detection standard, such as polyurethane resin which is fully aqueous and has wear resistance, light resistance, rubbing color fastness and stain resistance.
Preferably, in step S3, the resin is a back cover material, specifically, an alkali-acid-resistant aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, and resistance to jungle tests (90 ℃, 95 humidity) for 168 × 5 hours or more.
Preferably, in step S5, the roller bottom coating compound is a full-aqueous polyurethane synthetic leather slurry or an acrylic resin synthetic leather slurry with high temperature light aging resistance, hydrolysis resistance, folding resistance, high adhesion and extensibility.
Preferably, in step S7, the guniting slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high-temperature light aging resistance, high wear resistance, color fastness resistance and stain resistance.
Preferably, in step S1, the repair paste is uniformly applied to the surface of the microfiber leather base by roll coating or knife coating.
Preferably, in step S3, after buffing, the microfiber leather bass surface is coated with a layer of resin by spraying or roll coating.
The invention also provides high-simulation full-aqueous microfiber leather prepared by the preparation process.
The preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
The high-simulation full-aqueous microfiber leather disclosed by the invention adopts an environment-friendly aqueous microfiber base material and a leather finishing and surfacing process, and has higher simulation.
Example 2:
a preparation process of high-simulation full-aqueous microfiber leather comprises the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 2-10 g/sq.ft or 20-100 g/m2, the conveying speed is controlled to be 5-10 m/min, the gap is controlled to be 0.4-0.9 mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 50-100 ℃;
s2, buffing:
the repaired microfiber leather bass is passed through a leather grinding machine to grind off the repairing paste on the surface, the abrasive paper used for grinding leather is controlled between 180 and 580#, and the conveying speed is controlled between 5 and 10 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of microfiber leather bass, wherein the coating amount is controlled to be 1-5 g/sq.ft or 10-60 g/m2, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 50-100 ℃, and the conveying speed is controlled to be 5-10 m/min;
s4, ironing:
under the conditions that the temperature is 50-100 ℃ and the pressure is 50-100 kg, the surface of the microfiber leather bass is subjected to ironing; thus facilitating subsequent direct coating;
s5, roller bottom coating:
uniformly coating the prepared roller bottom coating chemical material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass under the condition that the consistency is 30-65 seconds in a #4 Ford quilt, drying in an oven with the temperature of 100-140 ℃, and rolling;
the prepared roller priming coating material, namely chemical synthetic leather slurry, is commonly used in the field, and is a surface material of microfiber leather. The kind and amount of the roller bottom coating compound can be determined by those skilled in the art according to the required color and the requirement of the detection standard, for example, some polyurethane resins with light resistance, folding resistance and hydrolysis and aging resistance are used for adjusting the formula, and the corresponding roller bottom coating compound is obtained by mixing according to the formula.
S6, embossing:
embossing the surface of the microfiber leather bass coated on the bottom of the roller by using a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 80-130 ℃, the pressure is controlled to be 100-200 kg and the conveying speed is 2-3.5 m/min;
the embossing is carried out by a roller embossing machine, and the person skilled in the art can carry out embossing according to the required lines to obtain the required lines.
S7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled to be 5-12 m/min, and the drying temperature is controlled to be 80-130 ℃.
The kind and amount of the guniting compound can be determined by those skilled in the art according to the required color, touch, gloss and detection standard, such as polyurethane resin which is fully aqueous and has wear resistance, light resistance, rubbing color fastness and stain resistance.
In this embodiment, in step S3, the resin is a back cover material, specifically, an alkali-acid-resistant aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, and resistance to forest tests (90 ℃, 95 humidity) for 168 × 5 hours or more.
In this embodiment, in step S5, the roller bottom coating compound is a full-aqueous polyurethane synthetic leather slurry or an acrylic resin synthetic leather slurry with high temperature light aging resistance, hydrolysis resistance, folding resistance, high adhesion and extensibility.
In this embodiment, in step S7, the guniting slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high-temperature light aging resistance, high wear resistance, color fastness and stain resistance.
In this embodiment, in step S1, the repair paste is uniformly applied to the surface of the microfiber corbeis by roll coating or knife coating.
In this embodiment, in step S3, after buffing, a layer of resin is coated on the surface of microfiber leather by spraying or roll coating.
In this embodiment, the invention further provides high-simulation full-aqueous microfiber leather prepared by the preparation process of the high-simulation full-aqueous microfiber leather.
The preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
The high-simulation full-aqueous microfiber leather disclosed by the invention adopts an environment-friendly aqueous microfiber base material and a leather finishing and surfacing process, and has higher simulation.
Example 3:
a preparation process of high-simulation full-aqueous microfiber leather comprises the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 10-20 g/sq.ft or 100-200 g/m2, the conveying speed is controlled to be 10-20 m/min, the gap is controlled to be 0.9-1.5 mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 100-150 ℃;
s2, buffing:
the repaired microfiber leather bass is passed through a leather grinding machine to grind off the repairing paste on the surface, abrasive paper used for grinding leather is controlled between 580 and 1000#, and the conveying speed is controlled between 10 and 15 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of microfiber leather bass, wherein the coating weight is controlled to be 5-8 g/sq.ft or 50-80 g/m2, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 100-150 ℃, and the conveying speed is controlled to be 12-20 m/min;
s4, ironing:
under the conditions that the temperature is 100-150 ℃ and the pressure is 100-150 kg, the surface of the microfiber leather bass is subjected to ironing; thus facilitating subsequent direct coating;
s5, roller bottom coating:
uniformly coating the prepared roller bottom coating chemical material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass under the condition that the consistency is 60-100 seconds at a #4 Ford quilt, drying in an oven with the temperature set at 140-180 ℃, and rolling;
the prepared roller priming coating material, namely chemical synthetic leather slurry, is commonly used in the field, and is a surface material of microfiber leather. The kind and amount of the roller bottom coating compound can be determined by those skilled in the art according to the required color and the requirement of the detection standard, for example, some polyurethane resins with light resistance, folding resistance and hydrolysis and aging resistance are used for adjusting the formula, and the corresponding roller bottom coating compound is obtained by mixing according to the formula.
S6, embossing:
embossing the surface of the microfiber leather bass coated on the bottom of the roller by using a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 130-180 ℃, the pressure is controlled to be 200-300 kg and the conveying speed is 3.5-5 m/min;
the embossing is carried out by a roller embossing machine, and the person skilled in the art can carry out embossing according to the required lines to obtain the required lines.
S7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled to be 12-20 m/min, and the drying temperature is controlled to be 130-180 ℃.
The kind and amount of the guniting compound can be determined by those skilled in the art according to the required color, touch, gloss and detection standard, such as polyurethane resin which is fully aqueous and has wear resistance, light resistance, rubbing color fastness and stain resistance.
In this embodiment, in step S3, the resin is a back cover material, specifically, an alkali-acid-resistant aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, and resistance to forest tests (90 ℃, 95 humidity) for 168 × 5 hours or more.
In this embodiment, in step S5, the roller bottom coating compound is a full-aqueous polyurethane synthetic leather slurry or an acrylic resin synthetic leather slurry with high temperature light aging resistance, hydrolysis resistance, folding resistance, high adhesion and extensibility.
In this embodiment, in step S7, the guniting slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high-temperature light aging resistance, high wear resistance, color fastness and stain resistance.
In this embodiment, in step S1, the repair paste is uniformly applied to the surface of the microfiber corbeis by roll coating or knife coating.
In this embodiment, in step S3, after buffing, a layer of resin is coated on the surface of microfiber leather by spraying or roll coating.
In this embodiment, the invention further provides high-simulation full-aqueous microfiber leather prepared by the preparation process of the high-simulation full-aqueous microfiber leather.
The preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
The high-simulation full-aqueous microfiber leather disclosed by the invention adopts an environment-friendly aqueous microfiber base material and a leather finishing and surfacing process, and has higher simulation.
Example 4:
a preparation process of high-simulation full-aqueous microfiber leather comprises the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather bass, wherein the coating weight is controlled to be 11g/sq.ft, the conveying speed is controlled to be 13m/min, the gap is controlled to be 1mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 100 ℃;
s2, buffing:
passing the repaired microfiber leather bass through a leather grinding machine to grind off the repairing paste on the surface, wherein the abrasive paper used for grinding leather is controlled at a speed of 600#, and the conveying speed is controlled at 10 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of the microfiber leather bass, wherein the coating weight is controlled to be 5g/sq.ft, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 100 ℃, and the conveying speed is controlled to be 13 m/min;
s4, ironing:
under the conditions that the temperature is 100 ℃ and the pressure is 100kg, the surface of the microfiber leather bass is scalded; thus facilitating subsequent direct coating;
s5, roller bottom coating:
uniformly coating the prepared roller priming coating material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass by adopting a consistency of #4 Ford quilt for 65 seconds, drying in an oven with the temperature set at 140 ℃, and rolling;
the prepared roller priming coating material, namely chemical synthetic leather slurry, is commonly used in the field, and is a surface material of microfiber leather. The kind and amount of the roller bottom coating compound can be determined by those skilled in the art according to the required color and the requirement of the detection standard, for example, some polyurethane resins with light resistance, folding resistance and hydrolysis and aging resistance are used for adjusting the formula, and the corresponding roller bottom coating compound is obtained by mixing according to the formula.
S6, embossing:
embossing the surface of the microfiber leather bass coated on the roller bottom by a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 135 ℃, the pressure is controlled to be 200kg and the conveying speed is 3 m/min;
the embossing is carried out by a roller embossing machine, and the person skilled in the art can carry out embossing according to the required lines to obtain the required lines.
S7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled at 13m/min and the drying temperature is controlled at 135 ℃.
The kind and amount of the guniting compound can be determined by those skilled in the art according to the required color, touch, gloss and detection standard, such as polyurethane resin which is fully aqueous and has wear resistance, light resistance, rubbing color fastness and stain resistance.
In this embodiment, in step S3, the resin is a back cover material, specifically, an alkali-acid-resistant aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, and resistance to forest tests (90 ℃, 95 humidity) for 168 × 5 hours or more.
In this embodiment, in step S5, the roller bottom coating compound is a full-aqueous polyurethane synthetic leather slurry or an acrylic resin synthetic leather slurry with high temperature light aging resistance, hydrolysis resistance, folding resistance, high adhesion and extensibility.
In this embodiment, in step S7, the guniting slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high-temperature light aging resistance, high wear resistance, color fastness and stain resistance.
In this embodiment, in step S1, the repair paste is uniformly applied to the surface of the microfiber corbeis by roll coating or knife coating.
In this embodiment, in step S3, after buffing, a layer of resin is coated on the surface of microfiber leather by spraying or roll coating.
In this embodiment, the invention further provides high-simulation full-aqueous microfiber leather prepared by the preparation process of the high-simulation full-aqueous microfiber leather.
The preparation process of the high-simulation full-aqueous microfiber leather is a full-aqueous direct coating process and has the following advantages:
1. the centrifugal paper is saved, and the direct coating process is to directly coat the chemical material on the base material in a roller coating or spraying manner, so that the centrifugal paper cannot be used;
2. the using amount of the chemical materials is reduced, because the chemical materials are directly coated in a roller coating or spraying manner according to a full-aqueous direct coating process, and the uniform coating effect can be achieved only by 13-20G/SF;
3. the process is full of water, pollution-free, volatile harmful gas-free and low in VOC.
The high-simulation full-aqueous microfiber leather disclosed by the invention adopts an environment-friendly aqueous microfiber base material and a leather finishing and surfacing process, and has higher simulation.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (7)
1. A preparation process of high-simulation full-aqueous microfiber leather is characterized by comprising the following steps:
s1, repairing the wound:
uniformly coating the repairing paste on the surface of the microfiber leather base, wherein the coating amount is controlled to be 2-20 g/sq.ft or 20-200 g/m2, the conveying speed is controlled to be 5-20 m/min, the gap is controlled to be 0.4-1.5 mm, and then drying is carried out in a drying tunnel, and the temperature in the drying tunnel is controlled to be 50-150 ℃;
s2, buffing:
the repaired microfiber leather bass is passed through a leather grinding machine to grind off the repairing paste on the surface, abrasive paper used for grinding leather is controlled between 180 and 1000#, and the conveying speed is controlled between 5 and 15 m/min;
s3, bottom sealing:
after buffing, coating a layer of resin on the surface of microfiber leather bass, wherein the coating amount is controlled to be 1-8 g/sq.ft or 10-80 g/m2, and then drying the microfiber leather through a drying tunnel, wherein the temperature of the drying tunnel is controlled to be 50-150 ℃, and the conveying speed is controlled to be 5-20 m/min;
s4, ironing:
under the conditions that the temperature is 50-150 ℃ and the pressure is 50-150 kg, the surface of the microfiber leather bass is subjected to ironing;
s5, roller bottom coating:
uniformly coating the prepared roller priming coating material, namely chemical synthetic leather slurry, on the surface of microfiber leather bass under the condition that the consistency is 30-100 seconds in a #4 Ford quilt, drying in an oven with the temperature set at 100-180 ℃, and rolling;
s6, embossing:
embossing the surface of the microfiber leather bass coated on the bottom of the roller by using a roller embossing machine, namely, carrying out an embossing process under the conditions that the temperature is controlled to be 80-180 ℃, the pressure is controlled to be 100-300 kg and the conveying speed is 2-5 m/min;
s7, guniting:
spraying slurry on the embossed microfiber leather bass surface, wherein the conveying speed is controlled to be 5-20 m/min, and the drying temperature is controlled to be 80-180 ℃.
2. The preparation process of the high-simulation full-aqueous microfiber leather according to claim 1, wherein in step S3, the resin is a back cover material, specifically an aqueous polyurethane anionic/cationic polymer with good water resistance, solvent resistance, adhesion performance, resistance to jungle tests (90 ℃, 95 humidity) for 168 × 5 hours or more, and alkali resistance.
3. The process for preparing high-simulation full-aqueous microfiber leather according to claim 1, wherein in step S5, the roller bottom coating material is full-aqueous polyurethane synthetic leather slurry or acrylic resin synthetic leather slurry which is resistant to high temperature light aging, hydrolysis and folding, has high adhesion and extensibility.
4. The process for preparing high-simulation full-aqueous microfiber leather according to claim 1, wherein in step S7, the slurry spraying slurry is polyurethane synthetic leather slurry or acrylic synthetic leather slurry with yellowing resistance, high temperature light aging resistance, high wear resistance, color fastness and stain resistance.
5. The preparation process of the high-simulation full-aqueous microfiber leather according to claim 1, wherein in step S1, the repairing paste is uniformly coated on the surface of microfiber leather bass by means of roll coating or knife coating.
6. The preparation process of the high-simulation full-aqueous microfiber leather according to claim 1, wherein in step S3, after the leather is buffed, a layer of resin is coated on the surface of the microfiber leather by spraying or roll coating.
7. The high-simulation full-water-based microfiber leather is characterized by being prepared by the preparation process of the high-simulation full-water-based microfiber leather according to any one of claims 1 to 6.
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