CN110820363A - Nano anti-fog synthetic leather and preparation method thereof - Google Patents

Nano anti-fog synthetic leather and preparation method thereof Download PDF

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Publication number
CN110820363A
CN110820363A CN201911187350.2A CN201911187350A CN110820363A CN 110820363 A CN110820363 A CN 110820363A CN 201911187350 A CN201911187350 A CN 201911187350A CN 110820363 A CN110820363 A CN 110820363A
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coating
base layer
layer
parts
fog
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刘以东
徐广梅
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DONGTAI FUAN SYNTHETIC MATERIALS CO LTD
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DONGTAI FUAN SYNTHETIC MATERIALS CO LTD
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Publication of CN110820363A publication Critical patent/CN110820363A/en
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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
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
    • 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
    • D06N3/0002—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
    • D06N3/0011—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 non-woven 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
    • D06N3/0056—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
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
    • 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
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • 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
    • D06N3/12—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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/186—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials one of the layers is on one surface of the fibrous web and the other layer is on the other surface of the fibrous web
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    • 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
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    • 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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    • 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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    • D06N2211/00—Specially adapted uses
    • D06N2211/12—Decorative or sun protection articles
    • D06N2211/28—Artificial leather

Abstract

The invention discloses a nano anti-fog synthetic leather and a preparation method thereof, which change the structure and the preparation method of the traditional nano anti-fog synthetic leather, wherein an intermediate layer is embedded in pores of a base layer, the intermediate layer comprises polyurethane, hexagonal boron nitride, silica gel and modal fiber, and the connecting attachment points of a nano anti-fog coating and the intermediate layer are increased by the characteristic that the hexagonal boron nitride is in a hexahedral crystal large surface area, but the hexagonal boron nitride is not easily attached to the base layer.

Description

Nano anti-fog synthetic leather and preparation method thereof
Technical Field
The invention relates to a nano anti-fog synthetic leather and a preparation method thereof.
Background
Natural leather is widely used for producing daily necessities and industrial products due to its excellent natural characteristics, but with the increase of the world population, the demand of human beings for leather is multiplied, and the demand of people cannot be met by the limited amount of natural leather for a long time. In order to solve the contradiction, scientists begin to research and develop artificial leather and synthetic leather for decades to make up for the deficiency of natural leather. At present, the existing microfiber synthetic leather mainly adopts non-woven fabrics as a base layer and polyurethane as an intermediate layer, and then a nano anti-fog coating is coated on the outer side of the polyurethane, but the adhesive force between the nano anti-fog coating and the intermediate layer in the synthetic leather with the structure is not high, so that the nano anti-fog coating is easy to fall off.
Disclosure of Invention
Aiming at the defects of the prior art, the invention solves the problems that: provides the nano anti-fog synthetic leather with the stably connected nano anti-fog coating and the middle layer and the preparation method thereof.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a nanometer antifogging synthetic leather comprises a nanometer antifogging coating, an intermediate layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the middle layer is embedded in the pores of the base layer; the nano antifogging coating is arranged on the outer sides of the base layer and the middle layer; the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 10-20 parts of hexagonal boron nitride, 10-20 parts of silica gel and 5-10 parts of modal fiber.
Further, the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 15 parts of hexagonal boron nitride, 15 parts of silica gel and 8 parts of modal fiber.
Further, the nano antifogging coating is prepared by reacting nano silica sol and an organic material.
Further, the pore diameter of the base layer is 0.6 to 0.8 mm.
A preparation method of nano anti-fog synthetic leather comprises the following steps:
s1, preparing an intermediate layer coating: feeding the modal fiber into a grinder to be ground into powder-shaped bodies; adding polyurethane, hexagonal boron nitride, silica gel and modal fiber powder into water according to the specified weight part, and fully stirring to obtain an interlayer coating;
s2, brushing the middle layer: coating the intermediate layer paint prepared in the step S1 on the outer side of the base layer;
s3, scraping: scraping the middle layer coating on the outer side surface of the base layer by using a scraper so that the middle layer is embedded into pores of the base layer, and scraping redundant middle layer coating so that the thickness of the middle layer is consistent with that of the base layer;
s4, drying and shaping: conveying the base layer with the intermediate layer coating embedded in the pores into an oven for heating and drying to form a staggered distribution structure with the intermediate layer embedded in the pores of the base layer;
s5, brushing a nano anti-fog coating: and (5) coating the nano anti-fog coating on the outer sides of the base layer and the middle layer in the step S4, and then sending the coating into an oven for drying to finish the manufacturing.
Further, in the step S1, the volume ratio of the total mass of the polyurethane, the hexagonal boron nitride, the silica gel, and the modal fiber to the water is 40: 1 to 60: 1 g/l.
Further, the temperature in the oven in the step S4 is 65 to 85 ℃, and the drying time is 6 to 9 min.
Further, the temperature of the oven in the step S5 is 80 to 100 ℃.
The invention has the advantages of
1. The invention changes the structure and the preparation method of the traditional nano anti-fog synthetic leather, the intermediate layer is embedded in the pores of the base layer and comprises polyurethane, hexagonal boron nitride, silica gel and modal fiber, the connection attachment point of the nano anti-fog coating and the intermediate layer is increased by the characteristic that the hexagonal boron nitride is in a hexahedral crystal large surface area, but the hexagonal boron nitride is not easily attached to the base layer, so the adhesion degree of the hexagonal boron nitride and the base layer is increased by taking a proper amount of silica gel as an adhesive adsorbent, the intermediate layer is scraped on the surface of the base layer by the scraper, and the intermediate layer is embedded in the surface of the base layer, so the tear resistance strength of the nano anti-fog coating, the intermediate layer and the base layer is greatly enhanced while the super-fiber form is maintained.
2. According to the invention, after the hexagonal boron nitride and the silica gel are completely embedded and filled in the pores of the base layer, the air permeability of the composite material is influenced, so that the Modal fiber is added into the middle layer, and the air permeability and the moisture absorption of the middle layer are increased through the Modal fiber powder, so that the air permeability and the moisture absorption of the composite material are improved.
Detailed Description
The present invention will be described in further detail below.
Example 1
A nanometer antifogging synthetic leather comprises a nanometer antifogging coating, an intermediate layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the middle layer is embedded in the pores of the base layer; the nano antifogging coating is arranged on the outer sides of the base layer and the middle layer; the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 10 parts of hexagonal boron nitride, 10 parts of silica gel and 5 parts of modal fiber. The nano antifogging coating is prepared by reacting nano silica sol and an organic material. The pore diameter of the base layer is 0.6 mm.
A preparation method of nano anti-fog synthetic leather comprises the following steps:
s1, preparing an intermediate layer coating: feeding the modal fiber into a grinder to be ground into powder-shaped bodies; adding polyurethane, hexagonal boron nitride, silica gel and modal fiber powder into water according to the specified weight part, and fully stirring to obtain an interlayer coating; the volume ratio of the total mass of the polyurethane, the hexagonal boron nitride, the silica gel and the modal fiber to the water is 40: 1 g/l.
S2, brushing the middle layer: and (4) coating the intermediate layer paint prepared in the step (S1) on the outer side of the base layer.
S3, scraping: scraping the middle layer coating on the outer side face of the base layer by using a scraper so that the middle layer is embedded into pores of the base layer, and scraping redundant middle layer coating so that the thickness of the middle layer is consistent with that of the base layer.
S4, drying and shaping: conveying the base layer with the intermediate layer coating embedded in the pores into an oven for heating and drying to form a staggered distribution structure with the intermediate layer embedded in the pores of the base layer; the temperature in the oven was 65 ℃ and the drying time was 9 min.
S5, brushing a nano anti-fog coating: and (5) coating the nano anti-fog coating on the outer sides of the base layer and the middle layer in the step S4, and then sending the coating into an oven for drying to finish the manufacturing. The temperature of the oven was 80 ℃.
Example 2
A nanometer antifogging synthetic leather comprises a nanometer antifogging coating, an intermediate layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the middle layer is embedded in the pores of the base layer; the nano antifogging coating is arranged on the outer sides of the base layer and the middle layer; the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 15 parts of hexagonal boron nitride, 15 parts of silica gel and 8 parts of modal fiber. The nano antifogging coating is prepared by reacting nano silica sol and an organic material. The pore diameter of the base layer is 0.7 mm.
A preparation method of nano anti-fog synthetic leather comprises the following steps:
s1, preparing an intermediate layer coating: feeding the modal fiber into a grinder to be ground into powder-shaped bodies; adding polyurethane, hexagonal boron nitride, silica gel and modal fiber powder into water according to the specified weight part, and fully stirring to obtain an interlayer coating; the volume ratio of the total mass of the polyurethane, the hexagonal boron nitride, the silica gel and the modal fiber to the water is 50: 1 g/l.
S2, brushing the middle layer: and (4) coating the intermediate layer paint prepared in the step (S1) on the outer side of the base layer.
S3, scraping: scraping the middle layer coating on the outer side face of the base layer by using a scraper so that the middle layer is embedded into pores of the base layer, and scraping redundant middle layer coating so that the thickness of the middle layer is consistent with that of the base layer.
S4, drying and shaping: conveying the base layer with the intermediate layer coating embedded in the pores into an oven for heating and drying to form a staggered distribution structure with the intermediate layer embedded in the pores of the base layer; the temperature in the oven was 70 ℃ and the drying time was 8 min.
S5, brushing a nano anti-fog coating: and (5) coating the nano anti-fog coating on the outer sides of the base layer and the middle layer in the step S4, and then sending the coating into an oven for drying to finish the manufacturing. The temperature of the oven was 90 ℃.
Example 3
A nanometer antifogging synthetic leather comprises a nanometer antifogging coating, an intermediate layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the middle layer is embedded in the pores of the base layer; the nano antifogging coating is arranged on the outer sides of the base layer and the middle layer; the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 20 parts of hexagonal boron nitride, 20 parts of silica gel and 10 parts of modal fiber. The nano antifogging coating is prepared by reacting nano silica sol and an organic material. The pore diameter of the base layer is 0.8 mm.
A preparation method of nano anti-fog synthetic leather comprises the following steps:
s1, preparing an intermediate layer coating: feeding the modal fiber into a grinder to be ground into powder-shaped bodies; adding polyurethane, hexagonal boron nitride, silica gel and modal fiber powder into water according to the specified weight part, and fully stirring to obtain an interlayer coating; the volume ratio of the total mass of the polyurethane, the hexagonal boron nitride, the silica gel and the modal fiber to the water is 60: 1 g/l.
S2, brushing the middle layer: and (4) coating the intermediate layer paint prepared in the step (S1) on the outer side of the base layer.
S3, scraping: scraping the middle layer coating on the outer side face of the base layer by using a scraper so that the middle layer is embedded into pores of the base layer, and scraping redundant middle layer coating so that the thickness of the middle layer is consistent with that of the base layer.
S4, drying and shaping: conveying the base layer with the intermediate layer coating embedded in the pores into an oven for heating and drying to form a staggered distribution structure with the intermediate layer embedded in the pores of the base layer; the temperature in the oven was 85 ℃ and the drying time was 6 min.
S5, brushing a nano anti-fog coating: and (5) coating the nano anti-fog coating on the outer sides of the base layer and the middle layer in the step S4, and then sending the coating into an oven for drying to finish the manufacturing. The temperature of the oven was 100 ℃.
Comparative examples
A nanometer antifogging synthetic leather comprises a nanometer antifogging coating, a polyurethane layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the outer side of the base layer is coated with polyurethane; the nano antifogging coating is arranged on the outer side of the polyurethane layer. The pore diameter of the base layer is 0.7 mm.
The tear strength and air permeability of examples 1 to 3 and comparative examples will be tested.
The nano antifogging synthetic leather of examples 1 to 3 and comparative example was tested for tear strength between the nano antifogging coating and the intermediate layer by the method of GB/T12833-2006.
The nano antifogging synthetic leather of examples 1 to 3 and comparative example was subjected to an air permeability test using an air permeability tester at a pressure of 200 Pa.
Figure DEST_PATH_IMAGE002AA
In conclusion, the tear strength of the nano anti-fog coating and the intermediate layer is obviously improved after the intermediate layer is additionally arranged, and when the weight ratio of 100 parts of polyurethane, 15 parts of hexagonal boron nitride, 15 parts of silica gel and 8 parts of modal fiber is reached, the balance of air permeability and tear strength is reached, and the performance of the whole nano anti-fog synthetic leather is improved in a balanced manner.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (8)

1. A nanometer antifogging synthetic leather is characterized by comprising a nanometer antifogging coating, an intermediate layer and a base layer; the base layer is a superfine fiber non-woven fabric with pores; the middle layer is embedded in the pores of the base layer; the nano antifogging coating is arranged on the outer sides of the base layer and the middle layer; the middle layer comprises the following components in parts by weight: 100 parts of polyurethane, 10-20 parts of hexagonal boron nitride, 10-20 parts of silica gel and 5-10 parts of modal fiber.
2. The nano anti-fog synthetic leather according to claim 1, wherein the intermediate layer comprises the following components in parts by weight: 100 parts of polyurethane, 15 parts of hexagonal boron nitride, 15 parts of silica gel and 8 parts of modal fiber.
3. The nano antifogging synthetic leather according to claim 1, wherein the nano antifogging coating is prepared by reaction of nano silica sol and organic materials.
4. The nano anti-fog synthetic leather according to claim 1, wherein the pore diameter of the base layer is 0.6 to 0.8 mm.
5. The preparation method of the nano anti-fog synthetic leather according to claim 1, characterized by comprising the following steps:
s1, preparing an intermediate layer coating: feeding the modal fiber into a grinder to be ground into powder-shaped bodies; adding polyurethane, hexagonal boron nitride, silica gel and modal fiber powder into water according to the specified weight part, and fully stirring to obtain an interlayer coating;
s2, brushing the middle layer: coating the intermediate layer paint prepared in the step S1 on the outer side of the base layer;
s3, scraping: scraping the middle layer coating on the outer side surface of the base layer by using a scraper so that the middle layer is embedded into pores of the base layer, and scraping redundant middle layer coating so that the thickness of the middle layer is consistent with that of the base layer;
s4, drying and shaping: conveying the base layer with the intermediate layer coating embedded in the pores into an oven for heating and drying to form a staggered distribution structure with the intermediate layer embedded in the pores of the base layer;
s5, brushing a nano anti-fog coating: and (5) coating the nano anti-fog coating on the outer sides of the base layer and the middle layer in the step S4, and then sending the coating into an oven for drying to finish the manufacturing.
6. The preparation method of the nano antifogging synthetic leather according to claim 5, wherein the volume ratio of the total mass of the polyurethane, the hexagonal boron nitride, the silica gel and the modal fiber to the water in the step S1 is 40: 1 to 60: 1 g/l.
7. The preparation method of the nano anti-fog synthetic leather according to claim 5, wherein the temperature in the oven in the step S4 is 65-85 ℃, and the drying time is 6-9 min.
8. The preparation method of the nano anti-fog synthetic leather according to claim 5, wherein the temperature of the oven in the step S5 is 80-100 ℃.
CN201911187350.2A 2019-11-28 2019-11-28 Nano anti-fog synthetic leather and preparation method thereof Pending CN110820363A (en)

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Citations (6)

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Application publication date: 20200221