CN111749026A - Preparation method of water-based ecological leather - Google Patents
Preparation method of water-based ecological leather Download PDFInfo
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- CN111749026A CN111749026A CN202010649274.9A CN202010649274A CN111749026A CN 111749026 A CN111749026 A CN 111749026A CN 202010649274 A CN202010649274 A CN 202010649274A CN 111749026 A CN111749026 A CN 111749026A
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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
- D06N3/12—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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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
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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
- D06N3/0056—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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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
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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
- D06N3/007—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
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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
- D06N3/0086—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
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Abstract
The invention discloses a preparation method of water-based ecological leather, which comprises the following steps: s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth; s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 70-100 parts of waterborne polyurethane, 0.2-0.8 part of dispersing agent, 2-6 parts of foam stabilizer, 0.2-1 part of flatting agent, 1-2 parts of wetting agent, 0.5-3 parts of thickening agent, 5-8 parts of mica powder, 6-10 parts of polypropylene powder and 3-6 parts of water-based color paste. The invention also discloses a product thereof. The waterborne polyurethane synthetic leather prepared by the invention can eliminate pollution from the source, adopts environment-friendly waterborne color paste, additives and fillers, is safe, nontoxic and environment-friendly, has excellent elasticity after film forming, has excellent durable hydrolysis resistance, high tear resistance and high scratch and abrasion resistance, has the touch similar to real leather, and has good moisture permeability and air permeability.
Description
Technical Field
The invention relates to the technical field of synthetic leather preparation, in particular to water-based ecological leather and a preparation method thereof.
Background
The polyurethane synthetic leather belongs to the class of polyurethane elastomers, has the appearance of soft and natural luster, soft hand feeling and strong real leather feeling, has excellent mechanical properties such as excellent bonding property with a base material, abrasion resistance, flexing resistance, ageing resistance and the like, also has the advantages of good cold resistance, ventilation, washability, convenient processing, excellent price and the like, and is the most ideal substitute of natural leather.
The wet polyurethane synthetic leather process is mainly characterized in that slurry is fully permeated into gaps of non-woven cloth through extrusion, then the non-woven cloth is placed in a coagulating bath, DMF is continuously fed into the coagulating bath from a resin solution by means of the miscible dissolution of a DMF-HO system, and water is fed into base cloth to gradually convert polyurethane from a dissolved state to a gel state so as to finally form a solid film; in the exchange process, a large number of micropores can be formed due to the regulation effect of the auxiliary agent and the shrinkage of polyurethane, and a multilayer structure with a continuous porous layer is obtained, so that the synthetic leather produced by the wet method has good moisture permeability and air permeability, is soft, plump and light in hand feeling, and is richer in the style and appearance of natural leather. However, the process uses a large amount of organic solvent, pollutes the environment, and DMF in the synthetic leather is easy to exceed the standard and is harmful to health, so the improvement is needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides aqueous ecological leather and a preparation method thereof, and aims to solve the problems that the existing wet polyurethane synthetic leather process uses a large amount of organic solvent, pollutes the environment, and DMF in the synthetic leather is easy to exceed the standard and is harmful to health.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation method of water-based ecological leather comprises the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 70-100 parts of waterborne polyurethane, 0.2-0.8 part of dispersing agent, 2-6 parts of foam stabilizer, 0.2-1 part of flatting agent, 1-2 parts of wetting agent, 0.5-3 parts of thickening agent, 5-8 parts of mica powder, 6-10 parts of polypropylene powder and 3-6 parts of waterborne color paste, premixing the waterborne polyurethane, the dispersing agent, the flatting agent, the wetting agent, the thickening agent, the mica powder, the polypropylene powder and the waterborne color paste in a stirring kettle according to a ratio, bubbling the premixed slurry by using a bubble generator after stirring, and preparing the waterborne polyurethane synthetic leather foamed slurry after bubbling;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth through a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying the waterborne polyurethane layer under the conditions that the temperature is 130-160 ℃, the length of an oven is 30-50 meters, and the linear speed is 10-20 m/min, so as to obtain the waterborne polyurethane synthetic leather bass.
According to a preferable technical scheme of the invention, the treatment liquid in S1 is impregnation liquid prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water according to a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnation liquid, and the liquid carrying amount on the base cloth is 20-30% by pressing rollers after impregnation.
As a preferable technical scheme of the invention, a six-roller heating ironing mode is adopted in S1, the heating temperature of a roller is 120-150 ℃, and the pressure is 2-4 MPa.
As a preferable technical scheme of the invention, the premixing and stirring time of each raw material in S2 is 30-50 min, and the stirring speed is 1000-1200 r/min.
As a preferable technical scheme of the invention, the bubbling rate of the bubble generator in S2 is 0.2-0.8 m3/h, and the bubble is foamed for 20-30 min under the stirring condition of 800-1000 r/min.
As a preferable technical scheme of the invention, the dispersing agent in S2 is selected from one or more of fatty alcohol-polyoxyethylene ether sulfate, fatty alcohol-polyoxyethylene ether carboxylate, and alkyl glycoside.
In a preferable technical scheme of the invention, the foam stabilizer in S2 is one or more of a fatty amide surfactant and a sulfonate surfactant.
As a preferable technical scheme of the invention, the leveling agent in S2 is an organosilicon modified acrylic leveling agent, and the wetting agent is an anionic organosilicon wetting agent.
In a preferred embodiment of the present invention, the thickener is a water-soluble associative polyurethane thickener or a water-soluble cellulose thickener.
As a preferable technical scheme, the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 400-600 g/m2。
The water-based ecological leather prepared by the preparation method is prepared from the environment-friendly water-based color paste, the auxiliary agent and the filler, is safe, non-toxic and environment-friendly, has excellent elasticity after film forming, has excellent durable hydrolysis resistance, high-strength tear resistance and high scratch and abrasion resistance, has the touch similar to that of leather, and has good moisture permeability and air permeability.
(III) advantageous effects
Compared with the prior art, the water-based ecological leather and the preparation method thereof provided by the invention have the following beneficial effects:
according to the waterborne ecological leather and the preparation method thereof, the prepared waterborne polyurethane synthetic leather eliminates pollution from the source, the environment-friendly waterborne color paste, the auxiliary agent and the filler are adopted, the waterborne polyurethane synthetic leather is safe, non-toxic and environment-friendly, the film has excellent elasticity after being formed, and has excellent durable hydrolysis resistance, high tear resistance and high scratch resistance and abrasion resistance, the prepared ecological synthetic leather has the general touch feeling of leather, is good in moisture permeability and air permeability, simple in process and suitable for popularization.
Drawings
FIG. 1 is a schematic flow diagram of a method for preparing aqueous ecological leather according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Example 1
Referring to fig. 1, the preparation method of the aqueous ecological leather provided by the invention comprises the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 70 parts of waterborne polyurethane, 0.2 part of dispersing agent, 2 parts of foam stabilizer, 0.2 part of leveling agent, 2 parts of wetting agent, 3 parts of thickening agent, 8 parts of mica powder, 10 parts of polypropylene powder and 6 parts of waterborne color paste, premixing the raw materials of the waterborne polyurethane, the dispersing agent, the leveling agent, the wetting agent, the thickening agent, the mica powder, the polypropylene powder and the waterborne color paste in a stirring kettle according to the proportion, bubbling the premixed slurry by using a bubble generator after stirring, and preparing the waterborne polyurethane synthetic leather foamed slurry after bubbling;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth by a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying at the temperature of 130 ℃, the length of an oven of 30 meters and the linear speed of 10m/min to obtain the waterborne polyurethane synthetic leather bass.
Specifically, the treatment liquid in S1 is an impregnation liquid prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water in a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnation liquid, and the liquid carrying amount on the base cloth is 20% by pressing rollers after impregnation.
Specifically, in S1, a six-roller heating ironing mode is adopted, the heating temperature of a roller is 120 ℃, and the pressure is 2 MPa.
Specifically, in the step S2, the premixing and stirring time of each raw material is 30min, and the stirring speed is 1000 r/min.
Specifically, the bubbling rate of the bubble generator in the S2 is 0.2m3/h, and the foaming is carried out for 20min under the stirring condition of 800 r/min.
Specifically, the dispersing agent in S2 is one or more selected from fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, and alkyl glycoside.
Specifically, the foam stabilizer in S2 is one or more of a fatty amide surfactant and a sulfonate surfactant.
Specifically, the leveling agent in the S2 is an organosilicon modified acrylic leveling agent, and the wetting agent is an anionic organosilicon wetting agent.
Specifically, the thickener is a water-soluble associative polyurethane thickener or a water-soluble cellulose thickener.
Specifically, the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 400g/m2。
The water-based ecological leather prepared by the preparation method is prepared from the environment-friendly water-based color paste, the auxiliary agent and the filler, is safe, non-toxic and environment-friendly, has excellent elasticity after film forming, has excellent durable hydrolysis resistance, high-strength tear resistance and high scratch and abrasion resistance, has the touch similar to that of leather, and has good moisture permeability and air permeability.
Example 2
Referring to fig. 1, the present invention provides a method for preparing water-based ecological leather, comprising the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 80 parts of waterborne polyurethane, 0.3 part of dispersant, 3 parts of foam stabilizer, 0.4 part of leveling agent, 1.2 parts of wetting agent, 2 parts of thickener, 7 parts of mica powder, 9 parts of polypropylene powder and 5 parts of waterborne color paste, wherein the waterborne polyurethane, the dispersant, the leveling agent, the wetting agent, the thickener, the mica powder, the polypropylene powder and the waterborne color paste are premixed in a stirring kettle according to the proportion, a bubble generator is adopted to bubble the premixed slurry after stirring is finished, and the waterborne polyurethane synthetic leather foaming slurry is prepared after bubbling is finished;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth by a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying at the temperature of 140 ℃, the length of an oven of 35 meters and the linear speed of 13m/min to obtain the waterborne polyurethane synthetic leather bass.
Specifically, the treatment liquid in S1 is an impregnation liquid prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water in a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnation liquid, and the liquid carrying amount on the base cloth is 22% by pressing rollers after impregnation.
Specifically, in S1, a six-roller heating ironing mode is adopted, the heating temperature of a roller is 130 ℃, and the pressure is 2.5 MPa.
Specifically, in the step S2, the premixing and stirring time of each raw material is 35min, and the stirring speed is 1050 r/min.
Specifically, the bubbling rate of the bubble generator in S2 was 0.3m3/h, and the foaming was carried out for 23min under stirring at 850 r/min.
Specifically, the dispersing agent in S2 is one or more selected from fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, and alkyl glycoside.
Specifically, the foam stabilizer in S2 is one or more of a fatty amide surfactant and a sulfonate surfactant.
Specifically, the leveling agent in the S2 is an organosilicon modified acrylic leveling agent, and the wetting agent is an anionic organosilicon wetting agent.
Specifically, the thickener is a water-soluble associative polyurethane thickener or a water-soluble cellulose thickener.
Specifically, the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 450g/m 2.
Example 3
Referring to fig. 1, the preparation method of the aqueous ecological leather provided by the invention comprises the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 80 parts of waterborne polyurethane, 0.5 part of dispersing agent, 4 parts of foam stabilizer, 0.4 part of leveling agent, 1.5 parts of wetting agent, 1.5 parts of thickening agent, 7 parts of mica powder, 8 parts of polypropylene powder and 5 parts of waterborne color paste, premixing the raw materials of the waterborne polyurethane, the dispersing agent, the leveling agent, the wetting agent, the thickening agent, the mica powder, the polypropylene powder and the waterborne color paste in a stirring kettle according to the proportion, bubbling the premixed slurry by using a bubble generator after stirring, and preparing the waterborne polyurethane synthetic leather foamed slurry after bubbling;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth by a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying under the conditions that the temperature is 145 ℃, the oven length is 45 meters, and the linear speed is 15m/min, so as to obtain the waterborne polyurethane synthetic leather bass.
Specifically, the treating fluid in the S1 is an impregnating solution prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water according to a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnating solution, and the liquid carrying amount on the base cloth is 20-30% through a press roller after impregnation.
Specifically, in S1, a six-roller heating ironing mode is adopted, the heating temperature of a roller is 140 ℃, and the pressure is 3.5 MPa.
Specifically, in the step S2, the premixing and stirring time of each raw material is 40min, and the stirring speed is 1100 r/min.
Specifically, the bubbling rate of the bubble generator in S2 is 0.6m3/h, and the foaming is carried out for 26min under the stirring condition of 900 r/min.
Specifically, the dispersing agent in S2 is one or more selected from fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, and alkyl glycoside.
Specifically, the foam stabilizer in S2 is one or more of a fatty amide surfactant and a sulfonate surfactant.
Specifically, the leveling agent in the S2 is an organosilicon modified acrylic leveling agent, and the wetting agent is an anionic organosilicon wetting agent.
Specifically, the thickener is a water-soluble associative polyurethane thickener or a water-soluble cellulose thickener.
Specifically, the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 500g/m 2.
Example 4
Referring to fig. 1, the preparation method of the aqueous ecological leather provided by the invention comprises the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 90 parts of waterborne polyurethane, 0.7 part of dispersant, 5 parts of foam stabilizer, 0.6 part of leveling agent, 1.6 parts of wetting agent, 2 parts of thickener, 6 parts of mica powder, 7 parts of polypropylene powder and 4 parts of waterborne color paste, premixing the waterborne polyurethane, dispersant, leveling agent, wetting agent, thickener, mica powder, polypropylene powder and waterborne color paste in a stirring kettle according to the proportion, bubbling the premixed slurry by using a bubble generator after stirring, and preparing the waterborne polyurethane synthetic leather foamed slurry after bubbling;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth by a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying at the temperature of 155 ℃, the length of an oven of 50 meters and the linear speed of 20m/min to obtain the waterborne polyurethane synthetic leather bass.
Specifically, the treating fluid in the S1 is an impregnating solution prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water according to a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnating solution, and the liquid carrying amount on the base cloth is 20-30% through a press roller after impregnation.
Specifically, in S1, a six-roller heating ironing mode is adopted, the heating temperature of a roller is 150 ℃, and the pressure is 4 MPa.
Specifically, in the step S2, the premixing and stirring time of each raw material is 50min, and the stirring speed is 1200 r/min.
Specifically, the bubbling rate of the bubble generator in S2 is 0.8m3/h, and the foaming is carried out for 30min under the stirring condition of 1000 r/min.
Specifically, the dispersing agent in S2 is one or more selected from fatty alcohol polyoxyethylene ether sulfate, fatty alcohol polyoxyethylene ether carboxylate, and alkyl glycoside.
Specifically, the foam stabilizer in S2 is one or more of a fatty amide surfactant and a sulfonate surfactant.
Specifically, the leveling agent in the S2 is an organosilicon modified acrylic leveling agent, and the wetting agent is an anionic organosilicon wetting agent.
Specifically, the thickener is a water-soluble associative polyurethane thickener or a water-soluble cellulose thickener.
Specifically, the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 600g/m 2.
In the embodiment, the waterborne polyurethane synthetic leather prepared by the preparation method of the waterborne ecological leather eliminates pollution from the source, the environment-friendly waterborne color paste, the auxiliary agent and the filler are adopted, the waterborne polyurethane synthetic leather is safe, nontoxic and environment-friendly, the film has excellent elasticity after being formed, the high-strength tear-resistant performance and the high scratch-resistant and abrasion-resistant performance are excellent, the prepared ecological synthetic leather has the touch similar to leather, and the waterborne polyurethane synthetic leather has the advantages of good moisture permeability and air permeability, simple process and suitability for popularization.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A preparation method of water-based ecological leather is characterized by comprising the following steps: the method comprises the following steps:
s1, preparing base cloth, pretreating the base cloth through the treating fluid, and rolling and ironing the pretreated base cloth;
s2, preparing the aqueous polyurethane synthetic leather foaming slurry by taking the following raw materials in parts by weight: 70-100 parts of waterborne polyurethane, 0.2-0.8 part of dispersing agent, 2-6 parts of foam stabilizer, 0.2-1 part of flatting agent, 1-2 parts of wetting agent, 0.5-3 parts of thickening agent, 5-8 parts of mica powder, 6-10 parts of polypropylene powder and 3-6 parts of water-based color paste, premixing the waterborne polyurethane, the dispersing agent, the flatting agent, the wetting agent, the thickening agent, the mica powder, the polypropylene powder and the water-based color paste in a stirring kettle according to a ratio, bubbling the premixed slurry by using a bubble generator after stirring, and preparing the waterborne polyurethane synthetic leather foamed slurry after bubbling;
s3, coating the foaming slurry of the waterborne polyurethane synthetic leather on the base cloth through a blade coating method, forming a waterborne polyurethane layer on the surface of the base cloth, and drying the waterborne polyurethane layer under the conditions that the temperature is 130-160 ℃, the length of an oven is 30-50 meters, and the linear speed is 10-20 m/min, so as to obtain the waterborne polyurethane synthetic leather bass.
2. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the treating fluid in the S1 is an impregnating solution prepared by uniformly mixing calcium chloride, modified starch, polyvinyl alcohol and water according to a mass ratio of 5:3.8:3.8:56, the base cloth is placed in the impregnating solution, and the liquid carrying amount on the base cloth is 20-30% through a press roll after impregnation.
3. The method for preparing aqueous ecological leather according to claim 1, characterized in that: and in the S1, a six-roller heating ironing mode is adopted, the heating temperature of a roller is 120-150 ℃, and the pressure is 2-4 MPa.
4. The method for preparing aqueous ecological leather according to claim 1, characterized in that: in the S2, the premixing and stirring time of each raw material is 30-50 min, and the stirring speed is 1000-1200 r/min.
5. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the bubbling rate of the bubble generator in the S2 is 0.2-0.8 m3/h, and the foaming is carried out for 20-30 min under the stirring condition of 800-1000 r/min.
6. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the dispersing agent in the S2 is one or more selected from fatty alcohol-polyoxyethylene ether sulfate, fatty alcohol-polyoxyethylene ether carboxylate and alkyl glycoside; the leveling agent in the S2 is an organic silicon modified acrylic leveling agent, and the wetting agent is an anionic organic silicon wetting agent.
7. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the foam stabilizer in the S2 adopts one or more of fatty amide surfactant and sulfonate surfactant.
8. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the thickening agent is a water-soluble associative polyurethane thickening agent or a water-soluble cellulose thickening agent.
9. The method for preparing aqueous ecological leather according to claim 1, characterized in that: the coating weight of the waterborne polyurethane synthetic leather foaming slurry in S3 is 400-600 g/m2。
10. An aqueous ecological leather prepared by the method of any one of claims 1 to 9.
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| CN113529433A (en) * | 2021-07-06 | 2021-10-22 | 浙江嘉柯新材料科技有限公司 | Production method of bio-based water-based suede locomotive suit leather |
| CN113668255A (en) * | 2021-08-03 | 2021-11-19 | 宋金火 | Formula and production method of electromagnetic shielding water-based ecological synthetic leather |
| CN114150512A (en) * | 2021-12-20 | 2022-03-08 | 丽水合力新材料有限公司 | Smooth PU waterborne synthetic leather of environmental protection |
| CN114892419A (en) * | 2022-05-19 | 2022-08-12 | 福建华夏合成革有限公司 | Preparation method of high-temperature-resistant thermoplastic LOGO case water-based leather |
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| CN114892419A (en) * | 2022-05-19 | 2022-08-12 | 福建华夏合成革有限公司 | Preparation method of high-temperature-resistant thermoplastic LOGO case water-based leather |
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