CN114672798A - Calendering roller for manufacturing skin-feel leather and preparation method and application thereof - Google Patents
Calendering roller for manufacturing skin-feel leather and preparation method and application thereof Download PDFInfo
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- CN114672798A CN114672798A CN202210330767.5A CN202210330767A CN114672798A CN 114672798 A CN114672798 A CN 114672798A CN 202210330767 A CN202210330767 A CN 202210330767A CN 114672798 A CN114672798 A CN 114672798A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
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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
- D06N3/007—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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a calendering roller for manufacturing skin-feel leather as well as a preparation method and application thereof, and relates to the technical field of leather manufacturing. The surface of the calendering roller blank is preheated, so that the powder with the micro-nano dual-scale structure passing through the cylindrical flow nozzle is accelerated and heated, when the powder collides with the surface of the heated calendering roller blank, kinetic energy of the powder is converted into internal energy, and then the contact surface of the powder with the micro-nano dual-scale structure and the roller blank is melted and welded on the surface of the calendering roller blank. When a large amount of powder is welded on the surface of the roller blank, a micro-nano structure coating is formed on the surface of the roller blank. The leather surface prepared by the coating forms a structure with micro-nano two-dimensional scale, and the skin touch feeling of the leather is optimized.
Description
Technical Field
The invention relates to the technical field of leather manufacturing, in particular to a calendering roller for manufacturing skin-feel leather and a preparation method and application thereof.
Background
In the field of leather production, the surface structure of calendering rolls has a significant influence on the feel of leather. At present, the calendering roller with the micro-nano structure on the surface is one of key parts for preparing the skin-feeling artificial leather, is a direct source of the skin feeling of the artificial leather, and is the most core technology for preparing the skin-feeling artificial leather.
For roller blanks with higher hardness, the powder with the micro-nano dual-scale structure can deform in different degrees when being sprayed on the surfaces of the roller blanks, the surface structure of a calendering roller is influenced, the touch feeling of leather is poor, and the quality of the leather is reduced.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a calendering roller for manufacturing skin-feel leather, and a preparation method and application thereof.
The invention is realized by the following steps:
the invention provides a preparation method of a calendering roller for manufacturing skin-feel leather, which comprises the steps of impacting powder with a micro-nano dual-scale structure to the surface of a preheated calendering roller blank by using a columnar flow nozzle so as to enable the impact surface of the powder to be melted on the surface of the calendering roller blank, and further welding to form a micro-nano structure coating; the hardness of the rolling roller blank is 200-700 Hv.
In a second aspect, the present invention provides a system for preparing calendering rolls for skin-feel leather manufacturing, suitable for use in the preparation method according to any one of the preceding embodiments, comprising a powder emission unit and a roll blank preheating unit.
The powder emission unit is provided with a column flow nozzle and is used for spraying powder with a micro-nano dual-scale structure to the surface of the roller blank, the roller blank preheating unit is a laser, and the laser is used for emitting laser to the surface of the roller blank to preheat the roller blank.
In a third aspect, the present invention provides a calendering roll for skin-feel leather production, which is prepared according to the preparation method of any one of the previous embodiments or the system of any one of the previous embodiments, and comprises a calendering roll blank and a micro-nano structure coating formed on the surface of the calendering roll blank.
In a fourth aspect, the present invention provides the use of a calendering roll for skin-feel leather manufacture made according to any of the preceding embodiments in the field of leather manufacture.
The invention has the following beneficial effects:
the invention provides a calendering roller for manufacturing skin-feel leather and a preparation method, a system and application thereof. When a large amount of powder is welded on the surface of the roller blank, a micro-nano structure coating is formed on the surface of the roller blank. The leather surface prepared by the coating forms a structure with micro-nano two-dimensional scale, and the skin touch feeling of the leather is optimized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a preparation system of a calendering roll for skin-feel leather production provided in example 1 of the present invention;
fig. 2 is a schematic diagram of the combination of a powder with a micro-nano dual-scale structure and a roller blank provided in embodiment 1 of the present invention;
fig. 3 is a scanning electron microscope image of the powder with the micro-nano dual-scale structure provided in embodiment 2 of the present invention;
fig. 4 is a scanning electron microscope image of the micro-nano structure coating provided in embodiment 2 of the present invention.
Icon: 100-preparation system of calendering rolls for skin-feel leather production; 111-column flow nozzle; 112-powder feeding air source; 113-powder feeding system; 114-powder heating system; 115-an accelerating gas source; 116-a gas heating system; 121-a laser; 200-roll blank; 300-powder; 310-coating with micro-nano structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The skin-feel artificial leather has rich and soft handfeel and good rebound resilience, and is widely applied to furniture, sofas, decorative soft bags, automobile seats, automobile interiors, daily necessities and the like. The calendering roller with the micro-nano dual-scale structure on the surface is one of key parts for preparing skin-feel artificial leather, but the existing method for preparing the calendering roller with the micro-nano dual-scale structure on the surface mainly adopts two methods of laser engraving and corrosion engraving, and the problems of unstable formation of the micro-nano dual-scale structure, short service life, low coating bonding strength, easy shedding, low embossing speed, poor structure stereoscopic impression, limited roller surface size, nonuniform large-area preparation, low manufacturing efficiency, high equipment maintenance and manufacturing cost and the like exist in the method, so that a new method for preparing the calendering roller is urgently needed to overcome the problems.
The inventor finds that the micro-nano structure coating can be formed better by spraying the powder with the micro-nano dual-scale structure on the surface of the roller blank, but for the roller blank with higher hardness, the powder can carry larger kinetic energy in the spraying process, and when the powder is sprayed on the surface of the roller blank with high hardness, the powder is easy to deform and even fall off and cannot be attached to the surface of the roller blank.
The invention provides a preparation method of a calendering roller for manufacturing skin-feel leather, which comprises the steps of impacting powder with a micro-nano dual-scale structure to the surface of a preheated calendering roller blank by using a columnar flow nozzle so as to enable the impact surface of the powder to be melted on the surface of the calendering roller blank, and further welding to form a micro-nano structure coating; the hardness of the rolling roller blank is 200-700 Hv.
The powder with the micro-nano dual-scale structure is a three-dimensional powder with a plurality of tree-shaped branches on the surface under microscopic observation, and due to the special form of the powder, after the powder is attached to the surface of a matrix, an uneven micro-nano structure coating can be formed on the surface of the matrix, and the coating can greatly improve the texture formation and the touch texture of leather.
The powder with the micro-nano dual-scale structure is sprayed out through the column flow nozzle, the kinetic energy given to the powder with the micro-nano dual-scale structure is low due to the fact that the spraying speed of the column flow nozzle is low, the powder cannot deform when contacting the surface of a roller blank, meanwhile, the impact surface of the powder is melted on the surface of the roller blank of the calendering roller by means of the preheated surface temperature of the roller blank, and then the micro-nano structure coating is formed through welding. According to the invention, the surface of the roller blank of the calendering roller is preheated, so that the powder with the micro-nano dual-scale structure passing through the cylindrical flow nozzle is accelerated and heated, and when the powder impacts the surface of the roller blank of the calendering roller, the kinetic energy of the powder is converted into internal energy, so that the contact end of the powder with the micro-nano dual-scale structure and the roller blank is melted and welded on the surface of the roller blank of the calendering roller. When a large amount of powder is welded on the surface of the roller blank, a micro-nano structure coating is formed on the surface of the roller blank. The leather surface prepared by the coating forms a structure with micro-nano two-dimensional scale, and the skin touch feeling of the leather is optimized.
In an optional embodiment, in order to enable the powder with the micro-nano double-scale structure to be stably welded on the surface of a roller blank and ensure that only the contact surface of the powder in contact with the roller blank is melted to form a better micro-nano structure coating, the preheating temperature of the roller blank is lower than 100-500 ℃ of the melting point of the powder.
Preferably, the preheating is to preheat the blank of the reduction roll by using laser. In other embodiments, the preheating may be achieved by electric heating, flame heating, or the like, as long as the roll blank can be preheated to a predetermined temperature, and the invention is not limited thereto.
Preferably, the calendering roll blank is made of carbon steel, the hardness of the carbon steel is high, the cost is low, the carbon steel is one of important materials for preparing the calendering roll blank, and due to the excessively high hardness of the carbon steel, a micro-nano structure coating formed on the surface of the carbon steel has a certain limiting effect. According to the invention, the surface of the roller blank is preheated, and the column flow nozzle sprays the powder with the micro-nano dual-scale structure at a low speed, so that the problem that a micro-nano structure coating with a better structure is difficult to form on the surface of the carbon steel calendering roller blank is solved.
In an alternative embodiment, in order to endow the micro-nano structure coating with excellent comprehensive properties such as corrosion resistance, oxidation resistance, heat resistance, low stress abrasive wear resistance and the like, the powder with the micro-nano dual-scale structure comprises pure nickel powder with a micro-nano two-dimensional structure or nickel-based powder with a micro-nano two-dimensional structure.
In an optional embodiment, the powder with the micro-nano dual-scale structure needs to be heated before impact, and the heating temperature is less than 100-200 ℃ of the melting point of the powder.
Preferably, the powder is impacted at a speed of 50 to 100m/s, and the powder has an average particle diameter of 60 to 200 μm.
When the impact speed of the powder exceeds the range, the kinetic energy of the powder is increased, and when the powder impacts the surface of a roller blank with high hardness, the powder is easy to deform and even fall off, so that a micro-nano structure coating with a better structure is difficult to form on the surface of the roller blank; when the impact velocity of the powder is smaller than the range, the kinetic energy of the powder is reduced, the powder cannot reach the surface of the roller blank, and the micro-nano structure coating cannot be formed.
When the melting temperature of the powder is higher than the range, the surface structure of the powder can be damaged, so that the powder does not have a micro-nano double-scale structure, and a micro-nano structure coating cannot be formed when the powder is welded on the surface of a roller blank; when the melting temperature of the powder is lower than the range, the welding strength of the powder and the roller blank is low, and the micro-nano structure coating is unstable.
In an optional embodiment, in order to ensure the surface smoothness of the roller blank, reduce the residual stress on the surface of the roller blank and ensure the welding stability of the powder with the micro-nano dual-scale structure and the roller blank, the method further comprises the step of carrying out roughness reduction pretreatment on the rolling roller blank before preheating the rolling roller blank.
Preferably, the roughness of the surface of the rolling blank of the calendering roller after pretreatment is less than 2 μm, and the inventor finds that the stability of welding the powder with the micro-nano double-scale structure and the rolling blank can be improved by reducing the roughness to the range.
Preferably, the pretreatment includes grinding and polishing, the grinding is grinding with sandpaper, and the polishing is polishing with a diamond polishing tape.
Preferably, in order to remove the residual scraps on the surface of the roller blank in the pretreatment process and ensure that the surface of the treated roller blank has no impurities, the pretreated calendering roller blank is required to be cleaned; more preferably, the cleaning is alcohol cleaning.
In a second aspect, the present invention provides a system for preparing calendering rolls for skin-feel leather manufacturing, suitable for use in the preparation method according to any one of the preceding embodiments, comprising a powder emission unit and a roll blank preheating unit. The powder emission unit is provided with a columnar flow nozzle and is used for spraying powder with a micro-nano dual-scale structure to the surface of the roller blank, the roller blank preheating unit is a laser, and the laser is used for emitting laser to the surface of the roller blank to preheat the roller blank.
In an alternative embodiment, the powder firing unit further comprises a powder feed gas source, a powder feed system, a powder heating system, an acceleration gas source, and a gas heating system.
The powder heating system and the gas heating system are both connected with the column flow nozzle and are used for inputting heated powder with a micro-nano dual-scale structure and carrier gas into the column flow nozzle; the powder feeding system is communicated with the powder heating system and used for conveying the powder with the micro-nano dual-scale structure to the powder heating system for heating; the accelerating gas source is communicated with the gas heating system, and the carrier gas is introduced into the gas heating system for heating.
Preferably, the carrier gas is an inert gas, more preferably, the carrier gas includes any one of nitrogen, argon or helium;
preferably, the heating temperature of the powder is lower than 100-200 ℃ of the melting point of the powder, and the heating temperature of the carrier gas is 500-1500 ℃.
The invention provides a preparation system of a calendering roller for manufacturing skin-feel leather, which comprises the following working procedures:
and heating the roller blank of the calendering roller by adopting a laser, and keeping the surface temperature of the roller blank lower than 100-500 ℃ of the melting point of the powder.
The method comprises the steps of conveying powder with a micro-nano dual-scale structure to a powder conveying system through a powder conveying air source, further entering a powder heating system, heating the powder, wherein the heating temperature is lower than 100-200 ℃ of the melting point of the powder, accelerating carrier gas, then entering a gas heating system, heating, wherein the heating temperature is 500-1500 ℃, feeding the heated powder and carrier gas into a column flow nozzle, accelerating the powder through the nozzle, spraying the powder to the surface of a preheated roller blank, converting the kinetic energy of the powder into internal energy, further melting the surface of the powder, which is in contact with the roller blank, welding the powder to the surface of the roller blank, and forming a micro-nano structure coating with a better form on the surface of the calendering roller blank when a large amount of powder is welded to the surface of the roller blank.
In a third aspect, the present invention provides a calendering roll for skin-feel leather production, which is prepared according to the preparation method of any one of the previous embodiments or the system of any one of the previous embodiments, and comprises a calendering roll blank and a micro-nano structure coating formed on the surface of the calendering roll blank.
In an optional embodiment, in order to ensure the stability of the powder with the micro-nano dual-scale structure on the surface of the roller blank and prevent the powder from falling off, the bonding strength of the micro-nano structure coating and the roller blank is greater than 30MPa, and the thickness of the micro-nano structure coating is 40-160 micrometers.
In a fourth aspect, the present invention provides the use of a calendering roll for skin-feel leather manufacture made according to any of the preceding embodiments in the field of leather manufacture.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
Referring to fig. 1, the present embodiment provides a system 100 for preparing calendering rollers for skin-feel leather manufacturing, which includes a powder emitting unit and a roller blank preheating unit.
The powder emission unit is provided with a cylindrical flow nozzle 111 for spraying the powder 300 with the micro-nano dual-scale structure to the surface of the roller blank 200, the roller blank preheating unit is a laser 121, and the laser 121 is used for emitting laser to the surface of the roller blank 200 to preheat the roller blank 200.
In this embodiment, the powder discharge unit further includes a powder feeding gas source 112, a powder feeding system 113, a powder heating system 114, an acceleration gas source 115, and a gas heating system 116.
The powder heating system 114 and the gas heating system 116 are both connected with the column flow nozzle 111 and are used for inputting heated powder 300 with a micro-nano dual-scale structure and carrier gas into the column flow nozzle 111; the powder feeding air source 112 is connected with the powder feeding system 113, and is used for conveying the powder 300 with the micro-nano dual-scale structure to the powder feeding system 113, and the powder feeding system 113 is communicated with the powder heating system 114 and is used for conveying the powder 300 with the micro-nano dual-scale structure to the powder heating system 114 for heating; the acceleration gas source 115 is in communication with the gas heating system 116, and the carrier gas is introduced into the gas heating system 116 for heating.
In this example, the carrier gas was nitrogen, the heating temperature of the carrier gas was 1250 ℃, and the heating temperature of the powder 300 was 1250 ℃.
The invention provides a preparation system 100 of a calendering roller for manufacturing skin-feel leather, which comprises the following specific working procedures:
and heating the calendering roller blank 200 by adopting a laser 121, and keeping the surface temperature of the roller blank 200 at 1250 ℃ which is the melting point of the powder 300 with the micro-nano dual-scale structure.
As shown in fig. 1, the powder feeding gas source 112 conveys the powder 300 with the micro-nano dual-scale structure to the powder feeding system 113, and then further enters the powder heating system 114 to heat the powder 300, the carrier gas enters the gas heating system 116 after acceleration to heat, the heated powder 300 and the carrier gas enter the cylindrical flow nozzle 111, the powder 300 is accelerated by the cylindrical flow nozzle 111 and then ejected, as shown in fig. 2, the powder 300 reaches the surface of the preheated roller blank 200, the kinetic energy of the powder 300 is converted into the internal energy to melt the surface of the powder 300 in contact with the roller blank 200, the powder 300 is welded to the surface of the roller blank 200, and when a large amount of the powder 300 is welded to the surface of the roller blank 200, a micro-nano structure coating 310 with a better form is formed on the surface of the calendaring roller blank 200.
Example 2
This example provides a calendering roll for manufacturing skin-feel leather, and the preparation method thereof is applicable to the system in example 1, and the specific preparation method is as follows:
s1 pretreatment of the roller blank of the calendering roller
And (3) grinding and polishing the No. 20 steel roller blank by using abrasive paper and a diamond polishing belt to ensure that the surface roughness of the carbon steel roller blank reaches 1.5 mu m, then cleaning the surface of the roller blank by using alcohol, removing residual scraps on the surface of the roller blank in the pretreatment process, and ensuring that the surface of the roller blank after treatment has no impurities.
S2 formation of micro-nano structure coating
And (4) placing the roll blank obtained in the step (S1) on a rotary table, reserving an area to be coated, protecting other areas on the surface of the roll blank by using an adhesive tape and a tool, fixing the roll blank on the rotary table, clamping the roll blank without looseness, and enabling the roll blank to rotate at a constant speed when the rotary table rotates.
And preheating the area of the roller blank of the calendering roller, in which the coating is to be formed, by using laser, wherein the preheating temperature of the roller blank is 1250 ℃. The powder with the micro-nano double-scale structure is impacted to the surface of a preheated calendering roller blank by using a column flow nozzle, the kinetic energy of the powder is converted into internal energy, the temperature of the impact position of the powder and the calendering roller blank is increased, when the temperature of the impact position exceeds 1460 ℃, the impact surface of the powder is melted, along with the continuous deposition of the powder, a large amount of powder is welded to the surface of the roller blank, and then a micro-nano structure coating with the thickness of 80 mu m is formed by welding, wherein the microstructure of the coating is shown in figure 3.
In this example, the micron-sized chromium-zirconium-nickel-based powder having a micro-nano dual-scale structure has a particle size of 90 μm, a powder impact speed of 100m/s, a powder heating temperature of 1250 ℃, and a powder microstructure shown in fig. 4.
Comparative example 1
This comparative example provides a calender roll for skin-feel leather manufacture, which was prepared in the same manner as in example 1, except that the roll blank temperature was room temperature and laser heating was not performed.
Due to the fact that the hardness of the roller blank is high, powder with a micro-nano dual-scale structure cannot be inserted into the surface of the roller blank, the temperature of the roller blank is low, the powder cannot be melted and welded on the surface of the roller blank, and a micro-nano structure coating cannot be formed on the surface of the roller blank.
Comparative example 2
This comparative example provides a calendering roll for skin-feel leather manufacture prepared in the same manner as in example 1 except that the powder was room temperature powder and was not heated when it impacted the surface of the roll blank.
Due to the fact that the temperature of the powder is too low, after kinetic energy of the powder is converted into internal energy, the surface of the roller blank is still not melted, and a micro-nano structure coating cannot be formed on the surface of the roller blank.
Comparative example 3
This comparative example provides a calendering roll for skin-feel leather manufacture prepared in the same manner as example 1 except that the powder was accelerated to 600m/s impact on the surface of the roll blank using a laval nozzle.
Because the speed of the powder is high, the kinetic energy of the powder is converted into internal energy in a large quantity, so that the whole powder particles are softened and collapsed, the micro-nano two-dimensional structure of the powder is damaged, and a micro-nano structure coating cannot be formed on the surface of the roller blank.
Comparative example 4
This comparative example provides a calendering roll for skin-feel leather manufacture, prepared in the same manner as example 1, except that a conventional spherical powder was used.
Due to the fact that the surface structure of the spherical powder is simple, the powder deposited on the surface of the roller blank cannot form a micro-nano structure coating on the surface of the roller blank.
Comparative example 5
This comparative example provides a calendering roll for skin-feel leather manufacture, which was prepared in the same manner as example 1, except that a ceramic roll blank was used for the calendering roll blank.
Due to the fact that the hardness of the ceramic roller blank is too high, when powder impacts the surface of the roller blank, effective combination cannot be formed between the powder and the roller blank, the powder cannot be deposited, and a micro-nano structure coating cannot be formed.
In summary, the calendering roller for manufacturing skin-feel leather, the preparation method, the system and the application thereof provided by the invention at least have the following advantages:
the powder with the micro-nano dual-scale structure is sprayed out through the columnar flow nozzle, the kinetic energy given to the powder with the micro-nano dual-scale structure is low due to the fact that the spraying speed of the columnar flow nozzle is low, the powder cannot deform when contacting the surface of the roller blank, meanwhile, the impact surface of the powder is melted on the surface of the roller blank of the calendering roller by means of the preheated surface temperature of the roller blank, and then the micro-nano structure coating is formed in a welding mode. According to the invention, the surface of the roller blank of the calendering roller is preheated, so that the powder with the micro-nano dual-scale structure passing through the cylindrical flow nozzle is accelerated and heated, and when the powder impacts the surface of the roller blank of the calendering roller, the kinetic energy of the powder is converted into internal energy, so that the contact end of the powder with the micro-nano dual-scale structure and the roller blank is melted and welded on the surface of the roller blank of the calendering roller. When a large amount of powder is welded on the surface of the roller blank, a micro-nano structure coating is formed on the surface of the roller blank. The leather surface prepared by the coating forms a structure with micro-nano two-dimensional scale, and the skin touch feeling of the leather is optimized.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. 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. The preparation method of the calendering roller for manufacturing the skin-feel leather is characterized by comprising the steps of using a columnar flow nozzle to impact powder with a micro-nano double-scale structure onto the surface of a preheated calendering roller blank so as to enable an impact surface of the powder to be melted on the surface of the calendering roller blank, and further welding to form a micro-nano structure coating;
the hardness of the rolling roller blank is 200-700 Hv.
2. The method according to claim 1, wherein the preheating temperature is 100 to 500 ℃ lower than the melting point of the powder;
preferably, the preheating is to preheat the rolling roller blank by using laser;
preferably, the rolling roller blank is made of carbon steel.
3. The preparation method according to claim 1, wherein the powder having the micro-nano dual-scale structure comprises pure nickel powder having a micro-nano two-dimensional structure or nickel-based powder having a micro-nano two-dimensional structure.
4. The preparation method according to claim 1, wherein the powder with the micro-nano dual-scale structure needs to be heated before being impacted, and the heating temperature is less than 100-200 ℃ of the melting point of the powder;
preferably, the powder impact speed is 50-100 m/s.
5. The preparation method according to any one of claims 2 to 4, characterized by further comprising a pretreatment for reducing roughness of the calender roll blank before preheating the calender roll blank;
preferably, the surface roughness of the roller blank of the calendering roller after pretreatment is less than 2 μm;
preferably, the pretreatment comprises sanding and polishing, wherein the sanding is sanding by using sand paper, and the polishing is polishing by using a diamond polishing belt;
preferably, cleaning the pretreated blank of the calendering roll; more preferably, the cleaning is alcohol cleaning.
6. A preparation system of a calendering roller for manufacturing skin-feel leather is characterized by being suitable for the preparation method of any one of claims 1 to 5, and comprising a powder emission unit and a roller blank preheating unit;
the roller blank preheating unit is a laser, and the laser is used for emitting laser to the surface of the roller blank to preheat the roller blank.
7. The system of claim 6, wherein the powder firing unit further comprises a powder feed system, a powder heating system, and a gas heating system;
the powder heating system and the gas heating system are both connected with the column flow nozzle and used for inputting heated powder with a micro-nano dual-scale structure and carrier gas into the column flow nozzle, and the powder feeding system is communicated with the powder heating system and used for conveying the powder with the micro-nano dual-scale structure in the powder feeding system to the powder heating system for heating;
preferably, the carrier gas is an inert gas, more preferably, the carrier gas includes any one of nitrogen, argon or helium;
preferably, the heating temperature of the powder is lower than 100-200 ℃ of the melting point of the powder, and the heating temperature of the carrier gas is 500-1500 ℃.
8. A calendering roller for manufacturing skin-feel leather prepared by the preparation method according to any one of claims 1 to 5 or the system according to any one of claims 6 to 7, wherein the calendering roller comprises a calendering roller blank and the micro-nano structure coating formed on the surface of the calendering roller blank.
9. The calendering roll according to claim 8, wherein the bonding strength of the micro-nano structure coating and the roll blank is more than 30MPa, and the thickness of the micro-nano structure coating is 40-160 μm.
10. Use of a calendering roll according to any one of claims 8 to 9 in the field of leather production.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330767.5A CN114672798B (en) | 2022-03-30 | 2022-03-30 | Calendering roller for manufacturing skin-feel leather and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330767.5A CN114672798B (en) | 2022-03-30 | 2022-03-30 | Calendering roller for manufacturing skin-feel leather and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114672798A true CN114672798A (en) | 2022-06-28 |
| CN114672798B CN114672798B (en) | 2023-06-02 |
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Citations (7)
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|---|---|---|---|---|
| JPS6099078A (en) * | 1983-10-31 | 1985-06-01 | Toray Ind Inc | Method and apparatus for embossing artificial leather |
| JPH0195807A (en) * | 1987-10-08 | 1989-04-13 | Kawasaki Steel Corp | Rolling roll |
| JP2004307968A (en) * | 2003-04-09 | 2004-11-04 | Nippon Steel Corp | Energizing roll and its manufacturing method |
| CN104278267A (en) * | 2014-10-30 | 2015-01-14 | 九江学院 | Multi-scale metal ceramic coating and preparation method thereof |
| CN110144543A (en) * | 2019-06-25 | 2019-08-20 | 广东省新材料研究所 | A kind of a wide range of controllable rewind roll and preparation method thereof of surface roughness |
| CN110331360A (en) * | 2019-08-22 | 2019-10-15 | 广东省新材料研究所 | Paper for daily use dandy roll and the preparation method and application thereof |
| CN112848529A (en) * | 2019-11-26 | 2021-05-28 | 昇印光电（昆山）股份有限公司 | Optical leather |
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2022
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|---|---|---|---|---|
| JPS6099078A (en) * | 1983-10-31 | 1985-06-01 | Toray Ind Inc | Method and apparatus for embossing artificial leather |
| JPH0195807A (en) * | 1987-10-08 | 1989-04-13 | Kawasaki Steel Corp | Rolling roll |
| JP2004307968A (en) * | 2003-04-09 | 2004-11-04 | Nippon Steel Corp | Energizing roll and its manufacturing method |
| CN104278267A (en) * | 2014-10-30 | 2015-01-14 | 九江学院 | Multi-scale metal ceramic coating and preparation method thereof |
| CN110144543A (en) * | 2019-06-25 | 2019-08-20 | 广东省新材料研究所 | A kind of a wide range of controllable rewind roll and preparation method thereof of surface roughness |
| CN110331360A (en) * | 2019-08-22 | 2019-10-15 | 广东省新材料研究所 | Paper for daily use dandy roll and the preparation method and application thereof |
| CN112848529A (en) * | 2019-11-26 | 2021-05-28 | 昇印光电（昆山）股份有限公司 | Optical leather |
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| SHUO YIN 等: ""Interfacial bonding features of Ni coating on Al substrate with different surface pretreatments in cold spray"", 《MATERIALS LETTERS》, vol. 138, pages 143 - 147 * |
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