CN109629249A - A kind of preparation method of water-soluble polyurethane leather beth - Google Patents
A kind of preparation method of water-soluble polyurethane leather beth Download PDFInfo
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- CN109629249A CN109629249A CN201811498509.8A CN201811498509A CN109629249A CN 109629249 A CN109629249 A CN 109629249A CN 201811498509 A CN201811498509 A CN 201811498509A CN 109629249 A CN109629249 A CN 109629249A
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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
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/0045—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by applying a ready-made foam layer; obtained by compressing, crinkling or crushing a foam layer, e.g. Kaschierverfahren für Schaumschicht
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—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
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- 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
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2209/00—Properties of the materials
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- D06N2209/121—Permeability to gases, adsorption
- D06N2209/123—Breathable
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- 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
- D06N2209/1685—Wear resistance
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N2211/00—Specially adapted uses
- D06N2211/12—Decorative or sun protection articles
- D06N2211/28—Artificial leather
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a kind of preparation methods of water-soluble polyurethane leather beth, it is related to waterborne polyurethane synthetic leather preparation technical field, in order to solve the problems, such as the water-soluble polyurethane leather beth stretch-proof of existing preparation method preparation, tear-proof and wear no resistance, steps are as follows: the preparation of base fabric；The preparation of waterborne polyurethane synthetic leather foamed slurry；Coat waterborne polyurethane foaming coating；Foaming washing；Drying, the preparation method of water-soluble polyurethane leather beth of the invention, foamed material foaming is rapid, stability is good, foaming layer foam structure made of it is stable, fine and close, regular, by the way that Tea Saponin, chitosan is added, enable to the viscosity enhancing of slurry, it is even closer in conjunction with base fabric, slurry has the function of good emulsification, dispersion, foaming, wet etc. simultaneously, its synthetic leather bass prepared has good stretch-proof, tear resistance and wearability, can be used for manufacturing various synthetic leather products, has a vast market foreground.
Description
Technical field
The present invention relates in waterborne polyurethane synthetic leather preparation technical field, specifically a kind of waterborne polyurethane synthetic leather shellfish
This preparation method.
Background technique
Aqueous polyurethane is to replace organic solvent as the new polyurethane system of decentralized medium using water, and also referred to as water dispersion is poly-
Urethane, aqueous polyurethane or water-based polyurethane.Aqueous polyurethane takes water as a solvent, pollution-free, safe and reliable, mechanical performance is excellent
Good, the advantages that compatibility is good, easily modified.
Synthetic Leather belongs to one kind of polyurethane elastomer, has soft glossy, naturally, soft, kishke feel
Strong appearance, have had excellent performance with substrate bonding, be wear-resistant, flex endurant, the excellent mechanical performance such as anti-aging, while also having
The advantages that good, ventilative, washable, easy to process, price is excellent honest and clean for cold resistance, be the ideal substitute of natural leather.
It needs to first pass through wet processing in Synthetic Leather preparation process and water-soluble polyurethane leather beth is made, it is existing
Water-soluble polyurethane leather beth preparation method made by water-soluble polyurethane leather beth stretch-proof, tear-proof and
Wearability is poor, it is difficult to meet the market demand.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of water-soluble polyurethane leather beth, to solve above-mentioned background
The problem of being proposed in technology.
To achieve the above object, the invention provides the following technical scheme:
A kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
10-30%, then successively carries out heating pressing, press polish and drying and processing to base fabric, and the processing solution includes below according to weight
Measure the raw material of part: 1-3 parts of water soluble polymer, 0.5-1.5 parts of metal nitrate, 80-100 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 80-100 parts of aqueous polyurethane, dispersing agent are weighed according to the ratio
0.2-0.4 parts, 1-2 parts of foam stabilizer, 2-4 parts of water-based thickener, 1-3 parts of wetting agent, 0.5-1.5 parts of levelling agent, chitosan 1-5
It is part, 1.5-3 parts of Tea Saponin, powder 6-12 parts modified micaceous；Then raw material is pre-mixed with high-speed mixer, mixing time is
20-30min, mixing speed 800-1000r/min, start micro-bubble generator after the completion, generate 100-200 μm fine
Then the micro air bubble is passed through well pre-mixed slurry by bubble, continuously ventilate 30-40min, and bubble diameter can be obtained and be
100-200 μm of waterborne polyurethane synthetic leather foamed slurry；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 130-150 DEG C of temperature after completion step 4), baking oven length is 30-50 meters, linear speed 10-20m/min
Under conditions of drying to get required water-soluble polyurethane leather beth.
As a further solution of the present invention: the water soluble polymer be polyvinyl alcohol, cellulose derivative, gelatin,
One of modified starch.
As a further solution of the present invention: the metal nitrate is one of sodium nitrate, calcium nitrate, magnesium nitrate.
As a further solution of the present invention: in step 1), described plate is that the heating of six rollers is plated, temperature 140-160
DEG C, calendering temperature is 140-160 DEG C, pressure 2-4MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
As a further solution of the present invention: the dispersing agent is lauryl sodium sulfate, polyacrylamide surface is living
One of property agent；The foam stabilizer is fatty acid amide surfactants, oxidation ammonium surfactant, cationic surfactant
One of；The water-based thickener is water-soluble association type polyurethane thickener or water-soluble cellulose thickener；
The wetting agent is anionic organosilicon wetting agent；The levelling agent is organosilicon-modified acrylic class levelling agent.
As a further solution of the present invention: the modified micaceous powder the preparation method is as follows: being in temperature by mica powder
400-500 DEG C roasting 2-6 hours, mica powder after taking 8-12 parts of roastings, 0.1-0.5 parts of gamma-aminopropyl-triethoxy-silanes add
Enter ultrasonic disperse 20-30min in 90-100 parts of water；5-10 parts of zinc borates, 2-5 parts of ammonium polyphosphate stirring 20-30min are added,
Centrifugation, is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 30-40KHz, ultrasonic power 200-400W, the centrifugation
Revolving speed is 5000-7000r/min, and time 10-30min, the temperature of the drying is 80-90 DEG C, and the time is 4-6 hours.
As a further solution of the present invention: the coating weight of the aqueous polyurethane layer is 30-100g/m2.
Compared with prior art, the beneficial effects of the present invention are: the preparation of water-soluble polyurethane leather beth of the invention
Method, rapidly, the bubble diameter of the waterborne polyurethane synthetic leather foamed slurry of preparation can reach 100-200 μm for foamed material foaming,
Bubble is fine and closely woven uniform and in the same size, and stability is good, and foaming layer foam structure made of it is stable, fine and close, regular, and prepares
It is simple for process, it is easy to continuous production, is very suitable to industrialized production；Foamed using bamboo vinegar, it is manufactured at
Product tensile strength, Tear strength and wearability all get a promotion, and have the characteristics of soft handle, quality is fine and smooth, good permeability, pass through
Tea Saponin, chitosan is added, enables to the viscosity enhancing of slurry, it is even closer in conjunction with base fabric, while there is good cream
The functions such as change, dispersion, foaming, wet, the synthetic leather bass of preparation not only have the basic structure of common synthetic leather bass, and
And there is good stretch-proof, tear resistance and wearability, it can be used for manufacturing various synthetic leather products, there is wide city
Field prospect.
Specific embodiment
Below in conjunction with specific embodiment, technical scheme in the embodiment of the invention is clearly and completely described, shows
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts all belongs to
In the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
10%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 1 part of water soluble polymer, 0.5 part of metal nitrate, 80 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 80 parts of aqueous polyurethane, dispersing agent 0.2 are weighed according to the ratio
Part, 1 part of foam stabilizer, 2 parts of water-based thickener, 1 part of wetting agent, 0.5 part of levelling agent, 1 part of chitosan, 1.5 parts of Tea Saponin, modified cloud
6 parts of female powder；Then raw material is pre-mixed with high-speed mixer, mixing time 20min, mixing speed 800r/min,
Start micro-bubble generator after the completion, generates 100-200 μm of micro air bubble, the micro air bubble is then passed through premixing
Good slurry, continuously ventilate 30min, and the waterborne polyurethane synthetic leather foamed slurry that bubble diameter is 100-200 μm can be obtained；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 130 DEG C of temperature after completion step 4), baking oven length is 30 meters, and linear speed dries under conditions of being 10m/min
It does to get required water-soluble polyurethane leather beth.
Wherein, the water soluble polymer is polyvinyl alcohol.
The metal nitrate is sodium nitrate.
In step 1), described plate is that the heating of six rollers is plated, and temperature is 140 DEG C, and calendering temperature is 140 DEG C, and pressure is
2MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
The dispersing agent is lauryl sodium sulfate；The foam stabilizer is fatty acid amide surfactants；The aqueous increasing
Thick dose is water-soluble association type polyurethane thickener；The wetting agent is anionic organosilicon wetting agent；The levelling agent
For organosilicon-modified acrylic class levelling agent.
Roasting 2 hours the preparation method is as follows: being 400 DEG C in temperature for mica powder for the modified micaceous powder, takes 8 parts of roastings
Ultrasonic disperse 20min in 90 parts of water is added in mica powder, 0.1 part of gamma-aminopropyl-triethoxy-silane afterwards；Add 5 parts of boric acid
Zinc, 2 parts of ammonium polyphosphate stir 20min, and centrifugation is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 30KHz, ultrasonic power
For 200W, the revolving speed of the centrifugation is 5000r/min, and time 10min, the temperature of the drying is 80 DEG C, and the time is 4 small
When.
The coating weight of the aqueous polyurethane layer is 30g/m2.
Embodiment 2
In the embodiment of the present invention, a kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
15%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 1.5 parts of water soluble polymer, 0.8 part of metal nitrate, 85 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 85 parts of aqueous polyurethane, dispersing agent 0.25 are weighed according to the ratio
Part, 1.2 parts of foam stabilizer, water-based thickener 2.5 parts, 1.5 parts of wetting agent, 0.8 part of levelling agent, 2 parts of chitosan, 2 parts of Tea Saponin, change
8 parts of mica powder of property；Then raw material is pre-mixed with high-speed mixer, mixing time 22min, mixing speed 850r/
Min starts micro-bubble generator after the completion, generates 100-200 μm of micro air bubble, is then passed through the micro air bubble pre-
The slurry mixed, continuously ventilate 32min, and the waterborne polyurethane synthetic leather that bubble diameter is 100-200 μm can be obtained and foam
Slurry；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 135 DEG C of temperature after completion step 4), baking oven length is 35 meters, and linear speed dries under conditions of being 12m/min
It does to get required water-soluble polyurethane leather beth.
Wherein, the water soluble polymer is cellulose derivative.
The metal nitrate is calcium nitrate.
In step 1), described plate is that the heating of six rollers is plated, and temperature is 145 DEG C, and calendering temperature is 145 DEG C, and pressure is
2MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
The dispersing agent is lauryl sodium sulfate；The foam stabilizer is oxidation ammonium surfactant；The aqueous thickening
Agent is water-soluble association type polyurethane thickener；The wetting agent is anionic organosilicon wetting agent；The levelling agent is
Organosilicon-modified acrylic class levelling agent.
Roasting 2 hours the preparation method is as follows: being 400 DEG C in temperature for mica powder for the modified micaceous powder, takes 8 parts of roastings
Ultrasonic disperse 20min in 90 parts of water is added in mica powder, 0.1 part of gamma-aminopropyl-triethoxy-silane afterwards；Add 5 parts of boric acid
Zinc, 2 parts of ammonium polyphosphate stir 20min, and centrifugation is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 30KHz, ultrasonic power
For 200W, the revolving speed of the centrifugation is 5000r/min, and time 10min, the temperature of the drying is 80 DEG C, and the time is 4 small
When.
The coating weight of the aqueous polyurethane layer is 50g/m2.
Embodiment 3
In the embodiment of the present invention, a kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
20%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 2 parts of water soluble polymer, 1 part of metal nitrate, 90 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 90 parts of aqueous polyurethane, dispersing agent 0.3 are weighed according to the ratio
It is part, 1.5 parts of foam stabilizer, 3 parts of water-based thickener, 3 parts of wetting agent, 1 part of levelling agent, 3 parts of chitosan, 2 parts of Tea Saponin, modified micaceous
9 parts of powder；Then raw material is pre-mixed with high-speed mixer, mixing time 25min, mixing speed 900r/min is complete
At rear starting micro-bubble generator, 100-200 μm of micro air bubble is generated, the micro air bubble is then passed through premix and is got togather
Slurry, continuously ventilate 35min, and it is 100-200 μm of waterborne polyurethane synthetic leather foamed slurry that bubble diameter, which can be obtained,；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 140 DEG C of temperature after completion step 4), baking oven length is 40 meters, and linear speed dries under conditions of being 15m/min
It does to get required water-soluble polyurethane leather beth.
Wherein, the water soluble polymer is polyvinyl alcohol.
The metal nitrate is sodium nitrate.
In step 1), described plate is that the heating of six rollers is plated, and temperature is 150 DEG C, and calendering temperature is 150 DEG C, and pressure is
3MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
The dispersing agent is lauryl sodium sulfate；The foam stabilizer is fatty acid amide surfactants；The aqueous increasing
Thick dose is water-soluble association type polyurethane thickener；The wetting agent is anionic organosilicon wetting agent；The levelling agent
For organosilicon-modified acrylic class levelling agent.
Roasting 4 hours the preparation method is as follows: being 450 DEG C in temperature for mica powder for the modified micaceous powder, takes 10 parts of roastings
Ultrasonic disperse 25min in 95 parts of water is added in mica powder, 0.3 part of gamma-aminopropyl-triethoxy-silane after burning；Add 8 parts of boron
Sour zinc, 3 parts of ammonium polyphosphate stir 25min, and centrifugation is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 35KHz, ultrasonic function
Rate is 300W, and the revolving speed of the centrifugation is 6000r/min, and time 20min, the temperature of the drying is 85 DEG C, and the time is 5 small
When.
The coating weight of the aqueous polyurethane layer is 80g/m2.
Embodiment 4
In the embodiment of the present invention, a kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
25%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 2.5 parts of water soluble polymer, 1.2 parts of metal nitrate, 95 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 95 parts of aqueous polyurethane, dispersing agent 0.35 are weighed according to the ratio
Part, 1.8 parts of foam stabilizer, 3.5 parts of water-based thickener, 2.5 parts of wetting agent, 1.2 parts of levelling agent, 4 parts of chitosan, 2.5 parts of Tea Saponin,
10 parts of modified micaceous powder；Then raw material is pre-mixed with high-speed mixer, mixing time 30min, mixing speed is
950r/min starts micro-bubble generator after the completion, 100-200 μm of micro air bubble is generated, then by the micro air bubble
It is passed through well pre-mixed slurry, continuously ventilate 40min, and the aqueous polyurethane that bubble diameter is 100-200 μm can be obtained and synthesize
Remove from office foamed slurry；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 145 DEG C of temperature after completion step 4), baking oven length is 45 meters, and linear speed dries under conditions of being 18m/min
It does to get required water-soluble polyurethane leather beth.
Wherein, the water soluble polymer is gelatin.
The metal nitrate is sodium nitrate.
In step 1), described plate is that the heating of six rollers is plated, and temperature is 155 DEG C, and calendering temperature is 155 DEG C, and pressure is
4MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
The dispersing agent is lauryl sodium sulfate；The foam stabilizer is oxidation ammonium surfactant；The aqueous thickening
Agent is water-soluble cellulose thickener；The wetting agent is anionic organosilicon wetting agent；The levelling agent is organic
Fluorine-silicon modified acrylic class levelling agent.
Roasting 6 hours the preparation method is as follows: being 500 DEG C in temperature for mica powder for the modified micaceous powder, takes 12 parts of roastings
Ultrasonic disperse 30min in 100 parts of water is added in mica powder, 0.5 part of gamma-aminopropyl-triethoxy-silane after burning；Add 10 parts
Zinc borate, 5 parts of ammonium polyphosphate stir 30min, and centrifugation is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 40KHz, ultrasound
Power is 400W, and the revolving speed of the centrifugation is 7000r/min, and time 30min, the temperature of the drying is 90 DEG C, the time 6
Hour.
The coating weight of the aqueous polyurethane layer is 80g/m2.
Embodiment 5
In the embodiment of the present invention, a kind of preparation method of water-soluble polyurethane leather beth, steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, base fabric liquid carrying rate is after impregnation
30%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 3 parts of water soluble polymer, 1.5 parts of metal nitrate, 100 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 100 parts of aqueous polyurethane, dispersing agent 0.4 are weighed according to the ratio
Part, 2 parts of foam stabilizer, 4 parts of water-based thickener, 3 parts of wetting agent, 1.5 parts of levelling agent, 5 parts of chitosan, 3 parts of Tea Saponin, modified cloud
12 parts of female powder；Then raw material is pre-mixed with high-speed mixer, mixing time 30min, mixing speed 1000r/
Min starts micro-bubble generator after the completion, generates 100-200 μm of micro air bubble, is then passed through the micro air bubble pre-
The slurry mixed, continuously ventilate 40min, and the waterborne polyurethane synthetic leather that bubble diameter is 100-200 μm can be obtained and foam
Slurry；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in base fabric
Surface solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 150 DEG C of temperature after completion step 4), baking oven length is 50 meters, and linear speed dries under conditions of being 20m/min
It does to get required water-soluble polyurethane leather beth.
Wherein, the water soluble polymer is modified starch.
The metal nitrate is magnesium nitrate.
In step 1), described plate is that the heating of six rollers is plated, and temperature is 160 DEG C, and calendering temperature is 160 DEG C, and pressure is
4MPa；The drying temperature is incremented to 160 DEG C by 120 DEG C.
The dispersing agent is polyacrylamide surfactant；The foam stabilizer is cationic surfactant；It is described
Water-based thickener is water-soluble cellulose thickener；The wetting agent is anionic organosilicon wetting agent；The levelling
Agent is organosilicon-modified acrylic class levelling agent.
Roasting 6 hours the preparation method is as follows: being 500 DEG C in temperature for mica powder for the modified micaceous powder, takes 12 parts of roastings
Ultrasonic disperse 30min in 100 parts of water is added in mica powder, 0.5 part of gamma-aminopropyl-triethoxy-silane after burning；Add 10 parts
Zinc borate, 5 parts of ammonium polyphosphate stir 30min, and centrifugation is drying to obtain, and the supersonic frequency of the ultrasonic disperse is 40KHz, ultrasound
Power is 400W, and the revolving speed of the centrifugation is 7000r/min, and time 30min, the temperature of the drying is 90 DEG C, the time 6
Hour.
The coating weight of the aqueous polyurethane layer is 100g/m2.
Comparative example 1
Compared with Example 3, Tea Saponin is free of, other are same as Example 3；
Comparative example 2
Compared with Example 3, not chitosan-containing, other are same as Example 3；
Comparative example 3
Compared with Example 3, Tea Saponin and chitosan are free of, other are same as Example 3.
Performance verification
| Group | Tensile strength/N | Tear strength/N | Wearability |
| Comparative example 1 | 950 | 45 | Coating falls off at 13500 turns |
| Comparative example 2 | 960 | 48 | Coating falls off at 13500 turns |
| Comparative example 3 | 600 | 30 | Coating falls off at 10000 turns |
| Embodiment 1 | 1000 | 55 | Coating falls off at 14500 turns |
| Embodiment 2 | 1050 | 55 | Coating falls off at 14400 turns |
| Embodiment 3 | 1100 | 58 | Coating falls off at 14500 turns |
As can be seen from the above results, prepared by the preparation method of water-soluble polyurethane leather beth through the invention
The performance and wearability of stretch-proof, the tearing of water-soluble polyurethane leather beth are all enhanced, especially to passing through
Tea Saponin and chitosan are added in the slurry has synergistic function, the preparation of water-soluble polyurethane leather beth of the invention
Method, rapidly, the bubble diameter of the waterborne polyurethane synthetic leather foamed slurry of preparation can reach 100-200 μm for foamed material foaming,
Bubble is fine and closely woven uniform and in the same size, and stability is good, and foaming layer foam structure made of it is stable, fine and close, regular, and prepares
It is simple for process, it is easy to continuous production, is very suitable to industrialized production；Foamed using bamboo vinegar, it is manufactured at
Product tensile strength, Tear strength and wearability all get a promotion, and have the characteristics of soft handle, quality is fine and smooth, good permeability, pass through
Tea Saponin, chitosan is added, enables to the viscosity enhancing of slurry, it is even closer in conjunction with base fabric, while there is good cream
The functions such as change, dispersion, foaming, wet, the synthetic leather bass of preparation not only have the basic structure of common synthetic leather bass, and
And there is good moisture-penetrable ventilated performance, it can be used for manufacturing various synthetic leather products, have a vast market foreground.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (7)
1. a kind of preparation method of water-soluble polyurethane leather beth, which is characterized in that steps are as follows:
1) preparation of base fabric: ready base fabric is impregnated with by processing solution, and base fabric liquid carrying rate is 10- after impregnation
30%, heating pressing, press polish and drying and processing are successively then carried out to base fabric, the processing solution includes below according to parts by weight
Raw material: 1-3 parts of water soluble polymer, 0.5-1.5 parts of metal nitrate, 80-100 parts of water；
2) preparation of waterborne polyurethane synthetic leather foamed slurry: 80-100 parts of aqueous polyurethane, dispersing agent 0.2- are weighed according to the ratio
0.4 part, 1-2 parts of foam stabilizer, 2-4 parts of water-based thickener, 1-3 parts of wetting agent, 0.5-1.5 parts of levelling agent, 1-5 parts of chitosan, tea
It is 1.5-3 parts of saponin, powder 6-12 parts modified micaceous；Then raw material is pre-mixed with high-speed mixer, mixing time 20-
30min, mixing speed 800-1000r/min start micro-bubble generator after the completion, generate 100-200 μm of fine gas
Bubble, is then passed through well pre-mixed slurry for the micro air bubble, continuously ventilate 30-40min, and bubble diameter can be obtained and be
100-200 μm of waterborne polyurethane synthetic leather foamed slurry；
3) coat waterborne polyurethane foaming coating: base fabric carries out blade coating waterborne polyurethane synthetic leather foamed slurry, in scrim surfaces
Solidification forms aqueous polyurethane layer, extracts；
4) it after extracting, foams into bamboo vinegar, forms porous polyurethane coating, washed after the completion of foaming；
5) dry: at 130-150 DEG C of temperature after completion step 4), baking oven length is 30-50 meters, and linear speed is the item of 10-20m/min
Drying is under part to get required water-soluble polyurethane leather beth.
2. the preparation method of water-soluble polyurethane leather beth according to claim 1, which is characterized in that the water solubility
Macromolecule is one of polyvinyl alcohol, cellulose derivative, gelatin, modified starch.
3. the preparation method of water-soluble polyurethane leather beth according to claim 2, which is characterized in that the metal nitre
Hydrochlorate is one of sodium nitrate, calcium nitrate, magnesium nitrate.
4. the preparation method of water-soluble polyurethane leather beth according to claim 1, which is characterized in that in step 1),
Described plate is that the heating of six rollers is plated, and temperature is 140-160 DEG C, and calendering temperature is 140-160 DEG C, pressure 2-4MPa；It is described
Drying temperature is incremented to 160 DEG C by 120 DEG C.
5. the preparation method of water-soluble polyurethane leather beth according to claim 1, which is characterized in that the dispersing agent
For one of lauryl sodium sulfate, polyacrylamide surfactant；The foam stabilizer is fatty acid amide surface-active
One of agent, oxidation ammonium surfactant, cationic surfactant；The water-based thickener is poly- for water-soluble association type
Urethane thickener or water-soluble cellulose thickener；The wetting agent is anionic organosilicon wetting agent；The levelling
Agent is organosilicon-modified acrylic class levelling agent.
6. the preparation method of water-soluble polyurethane leather beth a method as claimed in any one of claims 1 to 5, which is characterized in that described to change
Property mica powder the preparation method is as follows: by mica powder temperature be 400-500 DEG C roasting 2-6 hours, take 8-12 parts roast after
Ultrasonic disperse 20-30min in 90-100 parts of water is added in mica powder, 0.1-0.5 parts of gamma-aminopropyl-triethoxy-silanes；It adds
5-10 parts of zinc borates, 2-5 parts of ammonium polyphosphate stir 20-30min, and centrifugation is drying to obtain, the supersonic frequency of the ultrasonic disperse is
30-40KHz, ultrasonic power 200-400W, the revolving speed of the centrifugation are 5000-7000r/min, time 10-30min, institute
Stating dry temperature is 80-90 DEG C, and the time is 4-6 hours.
7. the preparation method of water-soluble polyurethane leather beth according to claim 1, which is characterized in that described aqueous poly-
The coating weight of urethane layer is 30-100g/m2.
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| CN110184825A (en) * | 2019-05-30 | 2019-08-30 | 陕西科技大学 | A kind of micro-nano frothed aqueous polyurethane superfine fiber chemical leather of environment-friendly type and its manufacturing method |
| CN110195357A (en) * | 2019-05-30 | 2019-09-03 | 陕西科技大学 | A kind of micro-nano frothed aqueous polyurethane synthetic leather of environment-friendly type and its manufacturing method |
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Application publication date: 20190416 |