CN114921964A - Antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather and preparation method thereof - Google Patents

Antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather and preparation method thereof Download PDF

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Publication number
CN114921964A
CN114921964A CN202210526345.5A CN202210526345A CN114921964A CN 114921964 A CN114921964 A CN 114921964A CN 202210526345 A CN202210526345 A CN 202210526345A CN 114921964 A CN114921964 A CN 114921964A
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layer
antibacterial
mildew
resin slurry
automobile seat
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Inventor
徐一剡
汪旗
方晨涛
叶琦
范中于
鲁华
童德旺
张洋
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Zhejiang Hexin New Material Co ltd
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Zhejiang Hexin New Material Co ltd
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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
    • D06N3/0002—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
    • D06N3/0009—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 knitted fabrics
    • 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
    • D06N3/0095—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 inversion technique; by transfer processes
    • D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
    • 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
    • D06N2209/00—Properties of the materials
    • D06N2209/10—Properties of the materials having mechanical properties
    • D06N2209/103—Resistant to mechanical forces, e.g. shock, impact, puncture, flexion, shear, compression, tear
    • 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
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1664—Releasability
    • 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
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1671—Resistance to bacteria, mildew, mould, fungi
    • 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
    • D06N2211/26—Vehicles, transportation
    • D06N2211/263—Cars
    • 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 provides an antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, which comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside; the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the middle layer is made of middle layer poly carbon resin slurry; the adhesive layer is made from a solventless resin syrup. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather has the advantages that the optimal selection of the surface layer antibacterial agent can be effectively compatible with resin, solvent and pigment; the polyurethane resin of the middle layer is optimally selected to connect the surface layer and the adhesion layer, so that the solvent-free polyurethane resin has good curing performance, and the resins are tightly combined; the optimized selection of the solvent-free resin of the next layer is combined with the middle layer and the cloth layer, so that the product has higher peeling force and has proper hand feeling. The invention also provides a preparation method of the special antibacterial and anti-mildew polyurethane synthetic leather for the automobile seat leather.

Description

Antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather and preparation method thereof
Technical Field
The invention relates to the technical field of synthetic leather manufacturing, in particular to special polyurethane synthetic leather for antibacterial and anti-mildew automobile seat leather and a preparation method thereof.
Background
Currently, the interior materials of automobiles mainly comprise genuine leather, polyurethane synthetic leather, thermoplastic polymers and textile materials. The automobile is a main vehicle for people to go out nowadays, and places where our bodies frequently contact with the automobile in daily use, such as a steering wheel, a seat, a door handle, a center console and the like, mainly include the seat and the steering wheel, and mainly face the following problems at present: 1. excellent and stable antibacterial and antimycotic properties; 2. has good inhibiting and killing effect on common pathogenic bacteria. Therefore, there is an urgent need to develop a car seat leather having bacteria-inhibiting or surface-sterilizing ability.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide the special antibacterial and anti-mildew polyurethane synthetic leather for the automobile seat leather so as to improve the antibacterial and anti-mildew performance of the automobile seat leather. The invention also aims to provide a preparation method of the special antibacterial and anti-mildew polyurethane synthetic leather for automobile seat leather.
The technical scheme adopted by the invention is as follows:
the antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside; the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the middle layer is made of middle layer poly carbon resin slurry; the adhesive layer is prepared from solvent-free resin slurry;
the polycarbonate resin slurry containing the antibacterial and anti-mildew material is prepared from the following components in parts by weight:
Figure BDA0003644656550000011
Figure BDA0003644656550000021
the middle layer polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000022
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000023
the invention discloses antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, wherein the antibacterial and anti-mildew material-containing polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000024
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000025
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000026
Figure BDA0003644656550000031
the antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather is characterized in that the thickness of the surface layer is 0.02-0.05mm, the thickness of the middle layer is 0.02-0.05mm, and the thickness of the adhesion layer is 0.15-0.25 mm.
The invention discloses antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, wherein the polycarbonate resin is polycarbonate polyurethane resin; the modulus of the polycarbonate resin is 40-50 MPa.
The invention discloses antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, wherein the viscosity of the polycarbonate resin slurry containing the antibacterial and anti-mildew material is 2000-6000CPS/25 ℃; the viscosity of the polycarbonate resin slurry is 2000-6000CPS/25 ℃.
The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather disclosed by the invention is characterized in that the coating weight of the polycarbonate resin slurry containing the antibacterial and anti-mildew material is 180 +/-20 g/m; the coating weight of the polycarbonate resin slurry is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
The invention relates to antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, wherein a catalyst-1 and a catalyst-2 are respectively a gel-promoting metal bismuth catalyst and a curing-promoting amine compound catalyst.
The invention discloses antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather, wherein a bottom cloth layer is high-density knitted cloth.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises the following steps:
(1) preparation of the skin layer: preparing the polycarbon resin slurry containing the antibacterial and anti-mildew material according to the proportion, then coating the polycarbon resin slurry on release paper, wherein the coating knife position is 0.1-0.2mm, drying in a drying oven at the temperature of 50-110 ℃ for 3-6min, and transferring the release paper grains to the surface; the antibacterial auxiliary agent contained in the slurry can inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: preparing the middle layer polycarbonate resin slurry according to the proportion, coating the middle layer polycarbonate resin slurry on a dried surface layer, coating a knife position of 0.1-0.2mm, and drying in a drying oven at the temperature of 60-120 ℃ for 4-8 min;
(3) preparation of the subsequent layer: preparing solvent-free resin slurry according to a ratio, coating a bonding layer on a dried middle layer, coating a cutter position by 0.2-0.35mm, drying in an oven at the temperature of 125-135 ℃ for 1-3min to form a film with the thickness of 0.15-0.25mm, and optimizing and selecting a group of polyether polycarbon copolymer type solvent-free resin, wherein the film forming principle (the solvent-free resin has slow intermolecular reaction in the initial stage of reaction and eliminates some physical bubbles in the process) is utilized, the cross-linking fast reaction is carried out after the temperature reaches 125 ℃ in the middle stage to form a reticular molecular structure for film formation, and the cross-linking and curing are carried out at the high temperature of 135 ℃ in the later stage to realize the smooth and exquisite fold line effect of the finished product surface and compact pores, and the close combination with the middle layer polycarbon polyurethane resin is realized by utilizing the similarity of the molecular structure;
(4) attaching: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 h;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises the following steps that in the step (1), the temperature gradient is 50/80/110 ℃ during drying in an oven; the temperature gradient when drying in the oven in the step (2) is 60/80/100/120 ℃ gradient temperature rise; and (4) in the step (3), the temperature gradient is 125/130/135 ℃ during drying.
The invention has the beneficial effects that:
1. according to the invention, on the premise of ensuring good physical properties of the synthetic leather, the antibacterial auxiliary agent is added to the surface layer, so that the synthetic leather has excellent antibacterial and anti-mildew properties. The antibacterial rate of the synthetic leather reaches more than or equal to 99 percent (escherichia coli and staphylococcus aureus) in a normal state; after the jungle (70 ℃ C. 95%) is aged and the martin is wear-resistant, the antibacterial rate of the synthetic leather is still more than or equal to 90%, and the synthetic leather has excellent stability. The product is stored for 14 days at 40 deg.C and 90% humidity, and has no mildew on surface.
2. The synthetic leather prepared by the method has higher peeling force and good folding resistance by utilizing the similarity of the molecular structure of the polycarbon resin and the crosslinking reaction of the solvent-free resin.
3. The solvent-free resin adopted by the invention does not contain harmful solvent, and the prepared product does not contain organic solvent, and belongs to a green and environment-friendly product.
4. The optimal selection of the surface antibacterial agent can be effectively compatible with resin, solvent and pigment; the polyurethane resin of the middle layer is optimally selected to connect the surface layer and the adhesion layer, so that the solvent-free polyurethane resin has good curing performance, and the resins are tightly combined; the optimized selection of the solvent-free resin of the next layer is combined with the middle layer and the cloth layer, so that the product has higher peeling force and has proper hand feeling.
The present invention will be further described with reference to the following specific examples.
Detailed Description
The sources of the raw materials in the following examples are: the polycarbonate resin is polycarbonate polyurethane resin HG3-092, the modulus of the polycarbonate resin is 40-50MPa, and the polycarbonate resin is purchased from Dieisheng synthetic resin Co.
The antibacterial auxiliary agent is an antibacterial auxiliary agent JN3-127 which is an inorganic compound and is purchased from Fuji chemical industry (Shanghai) Co., Ltd.
The solvent-free resin A and the solvent-free resin B are respectively solvent-free resin HX-9080A and solvent-free resin HX-9080B; the catalyst-1 and the catalyst-2 are respectively a gel-promoting metal bismuth catalyst and a curing-promoting amine compound catalyst, namely a catalyst HX-307 and a catalyst HX-504, which are purchased from Zhejiang Hexin science and technology Limited.
The leveling agent was BYK-9565, available from Bick chemical Co., Ltd.
Example 1
The antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside;
the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the middle layer is made of carbon-polymeric resin slurry; the adhesive layer is prepared from solvent-free resin slurry; the bottom cloth layer is high-density knitted cloth.
The antibacterial and anti-mildew material-containing polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000051
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000052
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000053
Figure BDA0003644656550000061
the viscosity of the polycarbon resin sizing agent containing the antibacterial and anti-mildew material is 4000CPS/25 ℃, and the coating weight is 180 +/-20 g/m; the viscosity of the polycarbonate resin slurry is 4000CPS/25 ℃, and the coating weight is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather comprises the following steps:
(1) preparation of the skin layer: blending the polycarbon resin slurry containing the antibacterial and anti-mildew material according to the proportion, then coating the polycarbon resin slurry on release paper, wherein the coating knife position is 0.15mm, drying the release paper in an oven, the temperature of the oven is 50/80/110 ℃, the gradient temperature rise is carried out, the drying time is 5min, the lines of the release paper are transferred to the surface, and the thickness of a film formed by drying a surface layer is 0.02 mm; an antibacterial auxiliary agent is added to inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: blending the middle layer polycarbonate resin slurry according to the proportion, coating the middle layer polycarbonate resin slurry on a dried surface layer, coating the surface layer with the coating knife position of 0.15mm, drying in a drying oven at the temperature of 60/80/100/120 ℃, carrying out gradient temperature rise, drying for 7min, and drying the middle layer to obtain a film with the thickness of 0.02 mm;
(3) preparation of the following layer: blending solvent-free resin slurry according to a ratio, coating a knife position of 0.3mm on a dried middle layer, drying in an oven at 125/130/135 ℃, gradient temperature rise of the oven, drying time of 1min and film forming thickness of 0.18mm, optimally selecting a group of polyether polycarbon copolymer type solvent-free resins A and B, and realizing smooth and fine crease effect, compact pores and tight combination with middle layer polycarbon type polyurethane resin by utilizing the film forming principle (the solvent-free resins are slow in intermolecular reaction in the initial stage of reaction, some physical bubbles are eliminated in the process, and after the temperature gradient reaches 125 ℃, the cross-linking fast reaction is carried out to form a reticular molecular structure and form a film;
(4) attaching: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 h;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
The finished product was tested for antibacterial activity after a jungle (70 ℃ 95%) test, in which representative and life-common colonies of escherichia coli (ATCC 8739) and staphylococcus aureus (ATCC 6538) were selected, and the results are shown in table 1 below.
Table 1 results of antibacterial test of polyurethane synthetic leather described in example 1
Figure BDA0003644656550000071
As can be seen from table 1, the automobile seat leather prepared in this example has excellent antibacterial performance, and the antibacterial rates against escherichia coli and staphylococcus aureus are 95.0% and 90.1%, respectively.
Example 2
The antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside;
the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the intermediate layer is made of a polycarbonate resin slurry; the adhesive layer is prepared from solvent-free resin slurry; the bottom cloth layer is high-density knitted cloth.
The antibacterial and anti-mildew material-containing polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000072
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000073
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000074
Figure BDA0003644656550000081
the viscosity of the polycarbon resin sizing agent containing the antibacterial and anti-mildew material is 4000CPS/25 ℃, and the coating weight is 180 +/-20 g/m; the viscosity of the polycarbon resin sizing agent is 4000CPS/25 ℃, and the coating weight is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather comprises the following steps:
(1) preparation of the skin layer: preparing the polycarbonate resin slurry containing the antibacterial and anti-mildew material according to the proportion, coating the slurry on release paper with a coating knife position of 0.15mm, drying in an oven at 50/80/110 ℃ for 5min, transferring the grains of the release paper to the surface, and drying the surface layer to form a film with a thickness of 0.02 mm; an antibacterial auxiliary agent is added to inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: blending the middle layer polycarbonate resin slurry according to the proportion, coating the middle layer polycarbonate resin slurry on a dried surface layer, coating the surface layer with the coating knife position of 0.18mm, drying in a drying oven at the temperature of 60/80/100/120 ℃ in a gradient manner, drying for 5min, and drying the middle layer to form a film with the thickness of 0.025 mm;
(3) preparation of the following layer: blending solvent-free resin slurry according to a ratio, coating a knife position of 0.3mm on a dried middle layer, drying in an oven at the oven temperature of 125/130/135 ℃, gradient heating, drying time of 1min and film forming thickness of 0.18mm, optimally selecting a group of polyether polycarbon copolymer solvent-free resins A and B, and realizing smooth and fine crease effect, compact foam holes of a finished product by using a film forming principle (the intermolecular reaction of the solvent-free resins is slow in the initial stage of the reaction, some physical bubbles are eliminated in the process, and the cross-linking is fast after the medium-stage temperature gradient reaches 125 ℃ to form a reticular molecular structure and form a film;
(4) attaching: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 h;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
The finished product was subjected to a jungle (70 ℃ C. 95%) test followed by an antibacterial test, which selected the representative and life-common colonies Escherichia coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538), with the results shown in Table 2 below.
Table 2 antibacterial test results for polyurethane synthetic leather described in example 2
Figure BDA0003644656550000091
As can be seen from Table 2, the automobile seat leather prepared in the embodiment has excellent antibacterial performance, and the antibacterial rates on Escherichia coli and Staphylococcus aureus are 96.5% and 92.1%, respectively.
Example 3
The antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside;
the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the intermediate layer is made of a polycarbonate resin slurry; the adhesive layer is prepared from solvent-free resin slurry; the bottom cloth layer is high-density knitted cloth.
The antibacterial and anti-mildew material-containing polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000092
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000093
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000094
Figure BDA0003644656550000101
the viscosity of the polycarbon resin sizing agent containing the antibacterial anti-mildew material is 4000CPS/25 ℃, and the coating weight is 180 +/-20 g/m; the viscosity of the polycarbon resin sizing agent is 4000CPS/25 ℃, and the coating weight is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather comprises the following steps:
(1) preparation of the skin layer: preparing the polycarbon resin slurry containing the antibacterial and anti-mildew material according to the proportion, coating the polycarbon resin slurry on release paper, wherein the coating knife position is 0.18mm, drying the release paper in an oven, the temperature of the oven is 50/80/110 ℃, the gradient temperature rise is carried out, the drying time is 5min, the lines of the release paper are transferred to the surface, and the thickness of a film formed by drying a surface layer is 0.03 mm; an antibacterial auxiliary agent is added to inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: blending the middle layer polycarbonate resin slurry according to the proportion, coating the middle layer polycarbonate resin slurry on a dried surface layer, coating the surface layer with the coating knife position of 0.2mm, drying in a drying oven at the temperature of 60/80/100/120 ℃, carrying out gradient temperature rise, drying for 7min, and drying the middle layer to form a film with the thickness of 0.03 mm;
(3) preparation of the following layer: blending solvent-free resin slurry according to a ratio, coating a knife position of 0.35mm on a dried middle layer, drying in an oven, heating the oven at 125/130/135 ℃ in a gradient manner, drying for 1min, and forming a film with a thickness of 0.2mm, wherein the optimized polyether polycarbon copolymerization solvent-free resin group realizes smooth and fine crease effect and compact foam of a finished product by using a film forming principle (the intermolecular reaction of the solvent-free resin is slow in the initial stage of the reaction, some physical bubbles are eliminated in the process; the cross-linking reaction is fast after the temperature gradient reaches 125 ℃ in the middle stage, a reticular molecular structure is formed, and the film is formed; and the cross-linking and curing are carried out at 135 ℃ in the later stage) and realizes the tight combination with the polyether carbon type polyurethane resin of the middle layer by using the similarity of the molecular structure of the resin;
(4) attaching: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 hours;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
The finished product was tested for antibacterial activity after a jungle (70 ℃ 95%) test, in which representative and life-common colonies of escherichia coli (ATCC 8739) and staphylococcus aureus (ATCC 6538) were selected, and the results are shown in table 3 below.
Table 3 antibacterial test results for polyurethane synthetic leather described in example 3
Figure BDA0003644656550000111
As can be seen from table 3, the automobile seat leather prepared in this example has excellent antibacterial performance, and the antibacterial rates against escherichia coli and staphylococcus aureus are 98.2% and 94.5%, respectively.
Example 4
The antibacterial and anti-mildew polyurethane synthetic leather special for the automobile seat leather comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially laminated from outside to inside;
the skin layer is made of polycarbonate resin slurry containing an antibacterial anti-mildew material; the intermediate layer is made of a polycarbonate resin slurry; the adhesive layer is prepared from solvent-free resin slurry; the bottom cloth layer is high-density knitted cloth.
The polycarbonate resin slurry containing the antibacterial and anti-mildew material is prepared from the following components in parts by weight:
Figure BDA0003644656550000112
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000113
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure BDA0003644656550000114
Figure BDA0003644656550000121
the viscosity of the polycarbon resin sizing agent containing the antibacterial and anti-mildew material is 4000CPS/25 ℃, and the coating weight is 180 +/-20 g/m; the viscosity of the polycarbon resin sizing agent is 4000CPS/25 ℃, and the coating weight is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather comprises the following steps:
(1) preparation of the skin layer: blending the polycarbon resin slurry containing the antibacterial and anti-mildew material according to a ratio, coating the polycarbon resin slurry on release paper with a coating knife position of 0.2mm, drying in an oven at 50/80/110 ℃ with gradient temperature rise for 5min, transferring the lines of the release paper to the surface, and drying the surface layer to form a film with a thickness of 0.035 mm; an antibacterial auxiliary agent is added to inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: preparing the middle layer polycarbonate resin slurry according to the proportion, coating the middle layer polycarbonate resin slurry on a dried surface layer, coating the surface layer with the coating position of 0.2mm, drying in a drying oven at 60/80/100/120 ℃ for 7min by gradient temperature rise, and drying the middle layer to form a film with the thickness of 0.035 mm;
(3) preparation of the following layer: blending solvent-free resin slurry according to a ratio, coating a knife position of 0.35mm on a dried middle layer, drying in an oven, heating the oven at 125/130/135 ℃ in a gradient manner, drying for 1min, and forming a film with a thickness of 0.2mm, wherein the optimized polyether polycarbon copolymer solvent-free resin is prepared by using the film forming principle (the intermolecular reaction of the solvent-free resin is slow in the initial stage of the reaction, some physical bubbles are eliminated in the process, the cross-linking and quick reaction are carried out after the temperature gradient reaches 125 ℃ in the middle stage, a reticular molecular structure is formed, and the film is formed;
(4) bonding: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 hours;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
The finished product was tested for antibacterial activity after jungle (70 ℃ C. 95%) tests, which selected representative and common life colonies, Escherichia coli and Staphylococcus aureus, as shown in Table 4 below.
Table 4 results of antibacterial test of polyurethane synthetic leather described in example 4
Figure BDA0003644656550000131
As can be seen from table 4, the automobile seat leather prepared in this example has excellent antibacterial performance, and the antibacterial rates against escherichia coli and staphylococcus aureus are 99.3% and 95.6%, respectively.
Other performance test methods and results for the polyurethane synthetic leathers described in examples 1-4 are shown in Table 5.
Table 5 other performance tests of the polyurethane leathers described in examples 1-4
Test item Test standard Test method
Jungle test (70 ℃, 95%, 840H) No problems of hydrolysis and pulverization on the surface
Conventional stripping ≥30N/3cm
Flame retardancy ≤70mm/min GB8410-2006
Resistance to mildew No visible mould or mildew smell QB/T4199-2011
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a special polyurethane synthetic leather of antibiotic anti-mildew car seat leather which characterized in that: the fabric comprises a surface layer, an intermediate layer, a bonding layer and a bottom cloth layer which are sequentially attached from outside to inside; the surface layer is made of carbon-polymeric resin slurry containing antibacterial and anti-mildew materials; the middle layer is made of middle layer poly carbon resin slurry; the adhesive layer is prepared from solvent-free resin slurry;
the polycarbonate resin slurry containing the antibacterial and anti-mildew material is prepared from the following components in parts by weight:
Figure FDA0003644656540000011
the middle layer polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure FDA0003644656540000012
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure FDA0003644656540000013
2. the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, characterized in that: the polycarbonate resin slurry containing the antibacterial and anti-mildew material is prepared from the following components in parts by weight:
Figure FDA0003644656540000014
the polycarbonate resin slurry is prepared from the following components in parts by weight:
Figure FDA0003644656540000021
the solvent-free resin slurry is prepared from the following components in parts by weight:
Figure FDA0003644656540000022
3. the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, characterized in that: the thickness of the skin layer is 0.02-0.05mm, the thickness of the middle layer is 0.02-0.05mm, and the thickness of the adhesion layer is 0.15-0.25 mm.
4. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, which is characterized in that: the polycarbon resin is polycarbon polyurethane resin; the modulus of the polycarbonate resin is 40-50 MPa.
5. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, which is characterized in that: the viscosity of the polycarbon resin sizing agent containing the antibacterial and anti-mildew material is 2000-6000CPS/25 ℃; the viscosity of the polycarbonate resin slurry is 2000-6000CPS/25 ℃.
6. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, characterized in that: the coating weight of the polycarbonate resin slurry containing the antibacterial anti-mildew material is 180 +/-20 g/m; the coating weight of the polycarbonate resin slurry is 200 +/-20 g/m; the coating weight of the solvent-free resin slurry is 250 +/-20 g/m.
7. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 1, characterized in that: the catalyst-1 and the catalyst-2 are respectively a gel-promoting metal bismuth catalyst and a curing-promoting amine compound catalyst.
8. The antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to any one of claims 1 to 7, which is characterized in that: the bottom cloth layer is high-density knitted cloth.
9. The preparation method of the special polyurethane synthetic leather for the antibacterial and anti-mildew automobile seat leather, which is characterized by comprising the following steps of: the method comprises the following steps:
(1) preparation of the skin layer: preparing the polycarbon resin slurry containing the antibacterial and anti-mildew material according to the proportion, then coating the material on release paper, wherein the coating knife position is 0.1-0.2mm, drying in a drying oven at the temperature of 50-110 ℃ for 3-6min, and transferring the grain of the release paper to the surface; the antibacterial auxiliary agent contained in the slurry can inhibit the growth of surface microorganisms, so that the product has a safe and long-acting antibacterial effect;
(2) preparation of the intermediate layer: blending the middle layer polycarbonate resin slurry according to the proportion, then coating the slurry on a dried surface layer, wherein the coating knife position is 0.1-0.2mm, and drying in a drying oven at the temperature of 60-120 ℃ for 4-8 min;
(3) preparation of the following layer: blending solvent-free resin slurry according to the proportion, coating an adhesion layer on the dried middle layer, coating a cutter position of 0.2-0.35mm, and drying in an oven at the oven temperature of 125-;
(4) bonding: attaching a base fabric to the solvent-free adhesive layer to obtain a base fabric layer;
(5) curing: curing the attached base cloth layer, the adhesive layer, the intermediate layer, the epidermal layer and the release paper at normal temperature for 6-24 h;
(6) separation: separating and winding the cured finished product and release paper by a guide roller and 2 winding devices; the finished product is on a finished product winding frame, and the release paper is on a release paper winding frame.
10. The preparation method of the antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather according to claim 9, characterized by comprising the following steps: the temperature gradient when drying in the oven in the step (1) is 50/80/110 ℃ gradient temperature rise; the temperature gradient in the step (2) is 60/80/100/120 ℃ gradient temperature rise when drying in the oven; and (4) in the step (3), the temperature gradient is 125/130/135 ℃ during drying.
CN202210526345.5A 2022-05-16 2022-05-16 Antibacterial and anti-mildew polyurethane synthetic leather special for automobile seat leather and preparation method thereof Pending CN114921964A (en)

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CN110144738A (en) * 2019-05-13 2019-08-20 浙江禾欣新材料有限公司 Folding is wear-resisting and the preparation method of the superior automotive seat leather of ageing-resistant performance
CN111877027A (en) * 2020-07-22 2020-11-03 浙江禾欣新材料有限公司 Antibacterial protective clothing leather and preparation method thereof
CN113308909A (en) * 2021-06-01 2021-08-27 浙江禾欣新材料有限公司 Method for manufacturing non-frosted waterborne suede-feel synthetic leather
CN113389066A (en) * 2021-06-01 2021-09-14 浙江禾欣新材料有限公司 Manufacturing method of synthetic leather with three-in-one organic silicon antifouling function

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007002365A (en) * 2005-06-24 2007-01-11 Komatsu Seiren Co Ltd Synthetic leather and method for producing the same
JP2007031851A (en) * 2005-07-22 2007-02-08 Toray Coatex Co Ltd Synthetic leather having trichophyton-resisting property
CN102454107A (en) * 2010-10-26 2012-05-16 北京崇高纳米科技有限公司 Polyurethane synthetic leather capable of inhibiting bacteria and resisting mildew and preparation method thereof
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CN111877027A (en) * 2020-07-22 2020-11-03 浙江禾欣新材料有限公司 Antibacterial protective clothing leather and preparation method thereof
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