CN110685166A - Cold-resistant and wear-resistant synthetic leather, preparation method and equipment - Google Patents
Cold-resistant and wear-resistant synthetic leather, preparation method and equipment Download PDFInfo
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- CN110685166A CN110685166A CN201911060796.9A CN201911060796A CN110685166A CN 110685166 A CN110685166 A CN 110685166A CN 201911060796 A CN201911060796 A CN 201911060796A CN 110685166 A CN110685166 A CN 110685166A
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/808—Filtering the mixture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/96—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with openwork frames or cages
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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
- D06N3/0002—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)
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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
- D06N3/005—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 blowing or swelling agent
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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
- D06N3/0059—Organic ingredients with special effects, e.g. oil- or water-repellent, antimicrobial, flame-resistant, magnetic, bactericidal, odour-influencing agents; perfumes
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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
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic 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
- 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
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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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Abstract
The invention discloses cold-resistant and wear-resistant synthetic leather which comprises coating liquid, wherein the coating liquid is prepared from the following components in parts by weight: 60% of waterborne polyurethane, 13% of light calcium carbonate, 3% -10% of foaming agent, 7% of foam stabilizer, 1% of graphene, 0.5% -10% of waterborne color paste, 0.5% -10% of leveling agent, 1% -2% of thickening agent and 1% -3% of cold-resistant agent. The invention also discloses preparation equipment of the cold-resistant and wear-resistant synthetic leather, which comprises a stirrer main body, wherein the stirrer main body is provided with a stirring shaft, the outer surface of the lower end of the stirring shaft is fixedly provided with a stirring rod, the stirrer main body is movably provided with a filter plate inside, and the positions, close to the two sides, of the inner wall of the stirrer main body are respectively provided with a limiting groove. The synthetic leather has the advantages of good air permeability, plump, smooth and soft hand feeling, special antistatic, flame retardant and waterproof effects, good moisture permeability and air permeability, soft hand feeling, and natural leather-like style and appearance.
Description
Technical Field
The invention relates to the technical field of cold-resistant and wear-resistant synthetic leather, in particular to cold-resistant and wear-resistant synthetic leather, and a preparation method and equipment thereof.
Background
Synthetic leather is a substitute material for leather, people gradually seek high-quality daily products along with the improvement of living standard of people, the demand of leather products is more and more, animal dermis can not meet the demands of people along with the enhancement of animal protection consciousness, the synthetic leather products gradually become the development trend in the future, production enterprises basically adopt traditional solvent type polyurethane resin to manufacture the synthetic leather, most of the solvent used as a dispersion medium of the resin is toxic and harmful organic solvents such as dimethyl formamide, toluene, acetone, butanone and the like, and the content of the solvent in the resin is up to 70-80 percent.
Synthetic leather on the market at present has two kinds of oiliness and water-based, the oiliness synthetic leather is gradually eliminated because of using a large amount of solvent, and the production process of the water-based synthetic leather mainly comprises the steps of coating the water-based polyurethane on leather base cloth, solidifying in water containing calcium chloride, because a certain amount of gas is generated in the curing process, the Beth hand feeling is relatively improved to a certain extent, but the effect is not obvious, the prior production process of the oily and water-based synthetic leather generally adopts the step of post-treatment of a bass sticking film, mainly because the wear-resisting fastness of the bass is not enough, the wear-resisting fastness of the surface of the bass is only increased by the sticking film, but the synthetic leather can affect the hand feeling after being pasted with the film, the cost can be greatly increased, the moisture permeability and the air permeability of the water-based foaming base after being pasted with the film are poor, and the style and the appearance of the water-based foaming base are affected.
Therefore, the cold-resistant wear-resistant synthetic leather, the preparation method and the equipment are provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the cold-resistant wear-resistant synthetic leather, the preparation method and the equipment, so that the synthetic leather has very good air permeability, is plump, smooth and soft in hand feeling, has special effects of static resistance, flame retardance and water resistance, has good moisture permeability and air permeability, is soft in hand feeling, and has the style and appearance effects similar to natural leather.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the cold-resistant wear-resistant synthetic leather comprises coating liquid, wherein the coating liquid is prepared from the following components in parts by weight: 60% of waterborne polyurethane, 13% of light calcium carbonate, 3% -10% of foaming agent, 7% of foam stabilizer, 1% of graphene, 0.5% -10% of waterborne color paste, 0.5% -10% of leveling agent, 1% -2% of thickening agent and 1% -3% of cold-resistant agent.
The preparation method of the cold-resistant and wear-resistant synthetic leather comprises the following steps:
s1: adding the raw materials into a stirring container according to a ratio, controlling the temperature at 100-150 ℃, uniformly stirring, filtering, measuring the viscosity of the mixture, and adjusting the viscosity by adding resin or a thickening agent;
s2: pretreating base cloth with polyvinyl alcohol to form a layer of polyvinyl alcohol film which is uniformly distributed on the surface of sea-island fibers, weighing a polyvinyl alcohol sample, putting the polyvinyl alcohol sample into a reaction kettle, adding a certain amount of water, stirring and dissolving at 80 ℃ to form a solution, shearing square base cloth, drying and weighing at 120 ℃, putting the square base cloth into the polyvinyl alcohol solution for dipping, extruding redundant solution through a roller coater after a proper time, drying at 120 ℃, and weighing;
s3: preparing a polyurethane impregnation solution, properly diluting polyurethane resin, controlling the content of polyurethane to be about 20%, adding a proper amount of light calcium as a filler, stirring to form emulsion, rolling and pressing the base cloth pretreated by polyvinyl alcohol into the polyurethane by a roller coater, adjusting the content, impregnation time, impregnation temperature and rolling pressure of the polyurethane to obtain base cloth with different performances, putting the base cloth into an aqueous solution, stirring at 60 ℃, degrading and dissolving the polyvinyl alcohol, and drying the base cloth to preliminarily form a base cloth similar to a natural leather;
s4: preparing the prepared coating liquid into a coating foam body through an intelligent dynamic foam generator, coating the coating foam body on the base cloth of leather, wherein the coating amount is accurately controlled by a computer, and the coating thickness and the coating length are adjusted according to different leather product requirements;
s5: drying the coated product by an oven, and performing multistage temperature control in the range of 100-180 ℃ to obtain the graphene modified waterborne polyurethane foaming base;
s6: carrying out post-treatment on the graphene modified waterborne polyurethane foaming base, wherein the post-treatment comprises embossing, flower absorbing, line kneading, lustring and polishing to obtain the graphene modified waterborne polyurethane ecological synthetic leather;
s7: and performing performance item tests on the synthetic leather, wherein the performance items comprise the technical indexes of waterborne polyurethane and the physical properties of the cold-resistant wear-resistant synthetic leather.
In S1, the foaming agent is azodicarbonamide, the foam stabilizer is a barium-zinc stabilizer, and the cold-resistant agent is dioctyl adipate.
The polymerization degree of the polyvinyl alcohol in S2 was 2000, and the impregnation ratio of the polyvinyl alcohol in S2 was 3%.
The coating mode in S4 is knife coating, roll coating or roller coating.
A preparation device of cold-resistant and wear-resistant synthetic leather comprises a stirrer main body, wherein a stirring shaft is arranged on the stirrer main body, and the outer surface of the lower end of the stirring shaft is fixedly provided with a stirring rod, the inner part of the stirrer main body is movably provided with a filter plate, the inner wall of the stirrer main body is provided with limit grooves at positions close to two sides, the inside of each limit groove is connected with a connecting rod in a sliding way, the outer surface of the upper end of the stirrer main body is provided with a motor and a feed inlet, the feed inlet is positioned at one side of the motor, the outer surface of the lower end of the motor is fixedly connected with the stirring shaft, a liquid outlet is arranged on the outer surface of the lower end of the stirrer main body, a sleeve is in threaded connection with the top end of the inner surface of the limit groove, the connecting rod runs through the inside of the sleeve, and the position of the outer surface of the connecting rod, which is positioned above the sleeve, is in threaded connection with a locking nut.
Preferably, the shape of the filter plate is pot cover-shaped, and the outer surfaces of the two sides of the filter plate are fixedly connected with the outer surface of the bottom end of the connecting rod.
Preferably, the shape of spacing groove and connecting rod the latter half is the T font, and both match each other, and the position of the outer surface of connecting rod the first half is provided with the screw thread.
Preferably, the upper half of the sleeve is located at the top end of the mixer body and it may be closely fitted to the lower outer surface of the lock nut.
(III) advantageous effects
The invention provides a preparation method and equipment of cold-resistant and wear-resistant synthetic leather, which have the following beneficial effects:
the cold-resistant wear-resistant synthetic leather provided by the invention has the wear resistance fastness far exceeding that of the traditional film, has very good air permeability and more plump, smooth and soft hand feeling, endows the synthetic leather with special effects of static resistance, flame retardance and water resistance, has good moisture permeability and air permeability, soft hand feeling and has the style and appearance similar to natural leather.
The invention provides a preparation method of cold-resistant and wear-resistant synthetic leather, which is characterized in that graphene modified waterborne polyurethane is adopted, a foaming coating method is used for producing synthetic leather base, the waterborne polyurethane is modified by graphene, the wear resistance fastness of the produced foaming base is far higher than the traditional film sticking fastness, slurry is fully permeated into gaps of base cloth through extrusion, then the base cloth is placed into a coagulating bath, DMF is continuously dissolved out of resin by utilizing the characteristic of mutual solubility of DMF and H2O, water enters the base cloth, the polyurethane dissolving environment is changed, the solution is changed into gel, finally a solid film is formed, the cold resistance of the synthetic leather is effectively improved, a large number of micropores are formed in the film due to the regulation of an auxiliary agent and the shrinkage of polyurethane in the dissolving and exchanging process, a multi-layer structure body with a continuous porous layer is obtained, and therefore, the produced synthetic leather has good moisture permeability and good air permeability, Soft hand feeling, and has the style and appearance similar to natural leather.
The preparation equipment for the cold-resistant and wear-resistant synthetic leather provided by the invention can be used for filtering the synthetic leather in the stirring process, so that the operation steps of filtering and impurity removing reaction are simplified, and a user can conveniently adjust the height of the filter plate according to different material heights in the stirrer main body, so that the materials in the stirrer main body can be conveniently filtered, the application range of the synthetic leather is expanded, and the use performance of the synthetic leather is improved.
Drawings
FIG. 1 is a block flow diagram of a manufacturing process of the present invention;
FIG. 2 is a schematic view showing the overall structure of the production apparatus of the present invention;
fig. 3 is a combined view of the mixer main body and the connecting rod according to the present invention.
In the figure: 1. a mixer main body; 2. a motor; 3. a stirring shaft; 4. a stirring rod; 5. filtering the plate; 6. a liquid outlet; 7. a feed inlet; 8. a limiting groove; 9. a connecting rod; 10. a sleeve; 11. and locking the nut.
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.
The first embodiment is as follows: referring to fig. 1, the cold-resistant wear-resistant synthetic leather provided by the invention comprises a coating liquid, wherein the coating liquid is prepared from the following components in parts by weight: 60% of waterborne polyurethane, 13% of light calcium carbonate, 3% -10% of foaming agent, 7% of foam stabilizer, 1% of graphene, 0.5% -10% of waterborne color paste, 0.5% -10% of leveling agent, 1% -2% of thickening agent and 1% -3% of cold-resistant agent.
In this embodiment, the specific component proportions of the cold-resistant and wear-resistant synthetic leather are as follows:
60% of waterborne polyurethane, 13% of light calcium carbonate, 3% of a foaming agent, 7% of a foam stabilizer, 1% of graphene, 0.5% of a waterborne color paste, 0.5% of a leveling agent, 1% of a thickening agent and 1% of a cold-resistant agent.
The preparation method of the cold-resistant wear-resistant synthetic leather comprises the following steps:
s1: preparing a coating liquid: adding the raw materials into a stirring container according to a ratio, controlling the temperature at 100-150 ℃, uniformly stirring, filtering, measuring the viscosity, adjusting the viscosity by adding resin or a thickening agent, wherein the foaming agent is azodicarbonamide, the foam stabilizer is a barium-zinc stabilizer, and the cold-resistant agent is dioctyl adipate;
s2: pretreating a base fabric by polyvinyl alcohol (PVA) to form a layer of PVA film which is uniformly distributed on the surface of sea-island fibers, increasing the sea component of the sea island, promoting the product shrinkage, eliminating the internal stress of the base fabric material, increasing the dimensional stability, weighing 50g of a polyvinyl alcohol (polymerization degree-2000) sample, putting the sample into a 2000mL reaction kettle, adding 950g of water, stirring and dissolving the sample at 80 ℃ to form a solution with the mass fraction of 5%, cutting the base fabric by 10cm × 10cm, drying and weighing at 120 ℃, putting the base fabric into a polyvinyl alcohol solution for impregnation, extruding the redundant solution by a roller coater after a proper time, drying at 120 ℃, weighing the weight, and controlling the polyvinyl alcohol impregnation ratio to be about 3%;
s3: preparing a polyurethane impregnation solution, properly diluting polyurethane resin, controlling the content of polyurethane to be about 30%, adding a proper amount of light calcium as a filler, fully stirring to form an emulsion, impregnating the polyvinyl alcohol pretreated base cloth into polyurethane by a roller coater through rolling, adjusting the content of polyurethane, impregnation time, impregnation temperature and rolling pressure to obtain base cloth with different performances, putting the base cloth into an aqueous solution, stirring at 60 ℃, degrading and dissolving the polyvinyl alcohol, and drying the base cloth to preliminarily form a base cloth similar to a natural leather shape;
s4: preparing the prepared coating liquid into a coating foam body through an intelligent dynamic foam generator, and coating the coating foam body on a base cloth of leather in a knife coating, roller coating or roller coating mode, wherein the coating amount is accurately controlled by a computer, and the coating thickness and the coating length are adjusted according to different leather product requirements;
s5: drying the coated graphene modified waterborne polyurethane by an oven, performing multi-section temperature control and sectional temperature rise at 100-180 ℃ to obtain the graphene modified waterborne polyurethane foaming base with very soft hand feeling and rich elasticity;
s6: carrying out post-treatment on the graphene modified waterborne polyurethane foaming base, wherein the post-treatment comprises embossing, flower sucking, line kneading, lustring and polishing to obtain the graphene modified waterborne polyurethane ecological synthetic leather;
s75: the performance test is carried out on the synthetic leather, the technical index of the waterborne polyurethane and the physical performance of the cold-resistant and wear-resistant synthetic leather are included,
the technical indexes of the waterborne polyurethane are as follows: the solid content is 30-35%, the density is 0.9-1.2 g.cm < -3 >, the viscosity is less than 4000mPa.s, the polyurethane film is alkali-resistant, 10% NaOH solution is used for polyurethane film, the temperature is 70 ℃, and the retention time is more than 90% after 2 hours;
the cold-resistant wear-resistant synthetic leather has the physical properties that: tensile load (N): longitudinal direction is more than or equal to 130; transverse direction is more than or equal to 120, and breaking elongation (%): longitudinal direction: 40-60 parts; transverse direction is more than or equal to 50-90, and the number of times of fracture resistance (ten thousand) is as follows: normal temperature: not less than 10 ten thousand; the temperature of-20 ℃ is more than or equal to 3 ten thousand, and the product has the wear resistance: no break at 5000 rpm, and cold resistance of the product: and (3) passing a low-temperature bending test at-55 ℃, wherein the embrittlement temperature of a common product is-10 ℃.
Referring to fig. 2 to 3, an apparatus for preparing the cold-resistant and wear-resistant synthetic leather comprises a stirrer body 1, wherein the stirrer body 1 is provided with a stirring shaft 3, the outer surface of the lower end of the stirring shaft 3 is fixedly provided with a stirring rod 4, the stirrer body 1 is movably provided with a filter plate 5 inside, the inner wall of the stirrer body 1 is provided with a limiting groove 8 at a position close to two sides, the inner part of the limiting groove 8 is connected with a connecting rod 9 in a sliding manner, the outer surface of the upper end of the stirrer body 1 is provided with a motor 2 and a feed inlet 7, the feed inlet 7 is positioned at one side of the motor 2, the outer surface of the lower end of the motor 2 is fixedly connected with the stirring shaft 3, the outer surface of the lower end of the stirrer body 1 is provided with a liquid outlet 6, and the top end of the inner surface of the limiting groove 8 is, the connecting rod 9 penetrates through the interior of the sleeve 10, and a locking nut 11 is connected to the outer surface of the connecting rod 9 at a position above the sleeve 10 in a threaded mode.
The shape of the filter plate 5 is a pot cover shape, and the outer surfaces of the two sides of the filter plate 5 are fixedly connected with the outer surface of the bottom end of the connecting rod 9, so that a user can conveniently adjust the position of the filter plate 5; the limiting groove 8 and the lower half part of the connecting rod 9 are both T-shaped and matched with each other, and the upper half part of the outer surface of the connecting rod 9 is provided with threads, so that a user can conveniently control the position of the locking nut 11; the upper half of the sleeve 10 is located at the top end of the mixer main body 1, and the sleeve can be tightly attached to the outer surface of the lower end of the locking nut 11, so that a user can fix the position of the connecting rod 9 conveniently.
The working principle is as follows: firstly, ingredients for preparing coating liquid are sequentially put into a stirrer main body 1 from a feed inlet 7, a motor 2 is started to drive a stirring shaft 3 to rotate, a stirring rod 4 is driven to stir the ingredients, after the ingredients are stirred, a lock nut 11 is rotated to leave enough distance between sleeves 10, then a connecting rod 9 is lifted upwards to drive a filter plate 5 to lift upwards, after the filter plate 5 is lifted to a certain position, the lock nut 11 is rotated to be in contact with the sleeves 10 to fix the lifting height of the connecting rod 9, so that the position of the filter plate 5 is fixed, the mixture is filtered by the filter plate 5, the filtered mixture flows out from a liquid outlet 6, the mixture can be filtered in the stirring process, the operation steps of filtering and impurity removing reaction are simplified, and a user can conveniently adjust the height of the filter plate 5 according to different material heights in the stirrer main body 1, thereby conveniently filtering the material inside the stirrer main body 1, enlarging the application range and improving the application performance.
Example two:
referring to fig. 1, the cold-resistant and wear-resistant synthetic leather, the preparation method and the preparation equipment provided by the invention are basically the same as those in the embodiment 1, and the difference is as follows:
the cold-resistant wear-resistant synthetic leather is prepared from the following specific components in parts by weight:
60% of waterborne polyurethane, 13% of light calcium carbonate, 6.5% of foaming agent, 7% of foam stabilizer, 1% of graphene, 5.25% of waterborne color paste, 5.25% of leveling agent, 1.5% of thickening agent and 2% of cold-resistant agent.
Example three:
referring to fig. 1, the cold-resistant and wear-resistant synthetic leather, the preparation method and the preparation equipment provided by the invention are basically the same as those of the examples 1 and 2, and the difference is that:
the cold-resistant wear-resistant synthetic leather is prepared from the following specific components in parts by weight:
60% of waterborne polyurethane, 13% of light calcium carbonate, 10% of foaming agent, 7% of foam stabilizer, 1% of graphene, 10% of waterborne color paste, 10% of leveling agent, 2% of thickening agent and 3% of cold-resistant agent.
The invention provides the cold-resistant wear-resistant synthetic leather, the preparation method and the equipment, so that the synthetic leather has very good air permeability, is plump, smooth and soft in hand feeling, has special effects of static resistance, flame retardance and water resistance, has good moisture permeability and air permeability, is soft in hand feeling, and has the style and appearance similar to natural leather.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The element defined by the sentence "comprising one.. said, does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element, the electrical elements presented therein are all electrically connected to an external master and 220V mains, and the master may be a conventionally known apparatus, such as a computer, which acts as a control.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The cold-resistant wear-resistant synthetic leather comprises coating liquid and is characterized in that the coating liquid is prepared from the following components in parts by weight: 60% of waterborne polyurethane, 13% of light calcium carbonate, 3% -10% of foaming agent, 7% of foam stabilizer, 1% of graphene, 0.5% -10% of waterborne color paste, 0.5% -10% of leveling agent, 1% -2% of thickening agent and 1% -3% of cold-resistant agent.
2. The preparation method of the cold-resistant and wear-resistant synthetic leather according to claim 1, which is characterized by comprising the following steps:
s1: adding the raw materials into a stirring container according to a ratio, controlling the temperature at 100-150 ℃, uniformly stirring, filtering, measuring the viscosity of the mixture, and adjusting the viscosity by adding resin or a thickening agent;
s2: pretreating base cloth with polyvinyl alcohol to form a layer of polyvinyl alcohol film which is uniformly distributed on the surface of sea-island fibers, weighing a polyvinyl alcohol sample, putting the polyvinyl alcohol sample into a reaction kettle, adding a certain amount of water, stirring and dissolving at 80 ℃ to form a solution, shearing square base cloth, drying and weighing at 120 ℃, putting the square base cloth into the polyvinyl alcohol solution for dipping, extruding redundant solution through a roller coater after a proper time, drying at 120 ℃, and weighing;
s3: preparing a polyurethane impregnation solution, properly diluting polyurethane resin, controlling the content of polyurethane to be about 20%, adding a proper amount of light calcium as a filler, stirring to form emulsion, rolling and pressing the base cloth pretreated by polyvinyl alcohol into the polyurethane by a roller coater, adjusting the content, impregnation time, impregnation temperature and rolling pressure of the polyurethane to obtain base cloth with different performances, putting the base cloth into an aqueous solution, stirring at 60 ℃, degrading and dissolving the polyvinyl alcohol, and drying the base cloth to preliminarily form a base cloth similar to a natural leather;
s4: preparing the prepared coating liquid into a coating foam body through an intelligent dynamic foam generator, coating the coating foam body on the base cloth of leather, wherein the coating amount is accurately controlled by a computer, and the coating thickness and the coating length are adjusted according to different leather product requirements;
s5: drying the coated product by an oven, and performing multistage temperature control in the range of 100-180 ℃ to obtain the graphene modified waterborne polyurethane foaming base;
s6: carrying out post-treatment on the graphene modified waterborne polyurethane foaming base, wherein the post-treatment comprises embossing, flower absorbing, line kneading, lustring and polishing to obtain the graphene modified waterborne polyurethane ecological synthetic leather;
s7: and performing performance item tests on the synthetic leather, wherein the performance items comprise the technical indexes of waterborne polyurethane and the physical properties of the cold-resistant wear-resistant synthetic leather.
3. The preparation method of the cold-resistant and wear-resistant synthetic leather according to claim 2, characterized by comprising the following steps: in S1, the foaming agent is azodicarbonamide, the foam stabilizer is a barium-zinc stabilizer, and the cold-resistant agent is dioctyl adipate.
4. The preparation method of the cold-resistant and wear-resistant synthetic leather according to claim 2, characterized by comprising the following steps: the polymerization degree of the polyvinyl alcohol in S2 was 2000, and the impregnation ratio of the polyvinyl alcohol in S2 was 3%.
5. The preparation method of the cold-resistant and wear-resistant synthetic leather according to claim 2, characterized by comprising the following steps: the coating mode in S4 is knife coating, roll coating or roller coating.
6. A preparation device of cold-resistant and wear-resistant synthetic leather for implementing the method of any one of claims 2 to 5, the preparation device comprises a stirrer main body (1), and is characterized in that: the stirrer is characterized in that a stirring shaft (3) is arranged on the stirrer main body (1), a stirring rod (4) is fixedly arranged on the outer surface of the lower end of the stirring shaft (3), a filter plate (5) is movably arranged in the stirrer main body (1), limiting grooves (8) are formed in positions, close to two sides, of the inner wall of the stirrer main body (1), a connecting rod (9) is connected to the inner portions of the limiting grooves (8) in a sliding mode, a motor (2) and a feed inlet (7) are arranged on the outer surface of the upper end of the stirrer main body (1), the feed inlet (7) is located on one side of the motor (2), the outer surface of the lower end of the motor (2) is fixedly connected with the stirring shaft (3), a liquid outlet (6) is formed in the outer surface of the lower end of the stirrer main body (1), a sleeve (10) is connected to the position of the top end of, the outer surface of the connecting rod (9) is in threaded connection with a locking nut (11) at a position above the sleeve (10).
7. The preparation equipment of cold-resistant and wear-resistant synthetic leather according to claim 6, characterized in that: the shape of the filter plate (5) is pot cover shape, and the outer surfaces of two sides of the filter plate (5) are fixedly connected with the outer surface of the bottom end of the connecting rod (9).
8. The preparation equipment of cold-resistant and wear-resistant synthetic leather according to claim 6, characterized in that: the shape of spacing groove (8) and connecting rod (9) the latter half is the T font, and both match each other, and the position of connecting rod (9) surface the upper half is provided with the screw thread.
9. The preparation equipment of cold-resistant and wear-resistant synthetic leather according to claim 6, characterized in that: the upper half part of the sleeve (10) is positioned at the top end of the stirrer main body (1), and the sleeve can be tightly attached to the outer surface of the lower end of the locking nut (11).
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