CN114672798B - 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 PDF

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CN114672798B
CN114672798B CN202210330767.5A CN202210330767A CN114672798B CN 114672798 B CN114672798 B CN 114672798B CN 202210330767 A CN202210330767 A CN 202210330767A CN 114672798 B CN114672798 B CN 114672798B
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powder
micro
blank
nano
roller blank
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CN114672798A (en
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谢迎春
黄继波
俞泽新
王昊
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Institute of New Materials of Guangdong Academy of Sciences
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Institute of New Materials of Guangdong Academy of Sciences
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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
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The invention discloses a calendaring roller for manufacturing skin-feel leather, and a preparation method and application thereof, and relates to the technical field of leather manufacturing. By preheating the surface of the rolling roller blank, the powder with the micro-nano double-scale structure passing through the cylindrical flow nozzle is accelerated and heated, and when the powder is impacted on the surface of the heated rolling roller blank, the kinetic energy of the powder is converted into internal energy, so that the contact surface of the powder with the micro-nano double-scale structure and the roller blank is melted and welded on the surface of the rolling roller blank. When a large amount of powder is welded to the surface of the roller blank, a micro-nano structure coating layer 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 of the leather is optimized.

Description

Calendering roller for manufacturing skin-feel leather and preparation method and application thereof
Technical Field
The invention relates to the technical field of leather manufacturing, in particular to a calendaring roller for manufacturing skin-feel leather, and a preparation method and application thereof.
Background
In the field of leather preparation, the calender roll surface structure has a significant impact on the feel of leather. It has now been found that calender rolls having a micro-nano structure on the surface are one of the key components in the preparation of skin-feel artificial leather, a direct source of skin feel for artificial leather, and the most core technology for the preparation of skin-feel artificial leather.
Aiming at the roller blank with higher hardness, when the powder with the micro-nano double-scale structure is sprayed on the surface of the roller blank, deformation of different degrees can occur, the surface structure of the calendaring roller is affected, the touch feeling of leather is poor, and the quality of the leather is reduced.
In view of this, the present invention has been made.
Disclosure of Invention
The invention aims to provide a calendaring roller for manufacturing skin-feel leather, and a preparation method and application thereof.
The invention is realized in the following way:
in a first aspect, the present invention provides a method for preparing a calender roll for skin-feel leather manufacture, comprising impinging powder having a micro-nano double-scale structure onto a preheated surface of a calender roll blank using a cylindrical flow nozzle, such that an impinging surface of the powder is melted on the surface of the calender roll blank, and then welding to form a micro-nano structured coating; the hardness of the calendaring roller blank is 200-700Hv.
In a second aspect, the present invention provides a system for preparing a calender roll for skin-feel leather manufacturing, suitable for use in the preparation method according to any one of the preceding embodiments, comprising a powder emitting unit and a roll-blank preheating unit.
The powder emitting unit is provided with a cylindrical flow nozzle for spraying powder with a micro-nano double-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 calender roll for skin-feel leather manufacture comprising a calender roll blank and a micro-nano structured coating formed on a surface thereof, made by the method of any of the preceding embodiments or by the system of any of the preceding embodiments.
In a fourth aspect, the present invention provides the use of a calender roll for skin-feel leather manufacture as prepared in any of the preceding embodiments in the field of leather preparation.
The invention has the following beneficial effects:
the invention provides a calendaring roller for skin-feel leather manufacture, a preparation method, a system and application thereof, wherein the surface of a calendaring roller blank is preheated, so that powder with a micro-nano double-scale structure passing through a cylindrical flow nozzle is accelerated and heated, and when the powder is impacted on the surface of the calendaring roller blank, the kinetic energy of the powder is converted into internal energy, so that the contact end of the powder with the micro-nano double-scale structure and the roller blank is melted and welded on the surface of the calendaring roller blank. When a large amount of powder is welded to the surface of the roller blank, a micro-nano structure coating layer 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 of the leather is optimized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a system for producing a calender roll for skin-feel leather production according to example 1 of the present invention;
FIG. 2 is a schematic diagram of the combination of powder with micro-nano double-scale structure and roller blank provided in example 1 of the present invention;
FIG. 3 is a scanning electron microscope image of the powder with micro-nano double-scale structure provided in example 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-a preparation system for calender rolls for skin-feel leather manufacture; 111-column flow nozzle; 112-a powder feeding air source; 113-a powder feeding system; 114-a powder heating system; 115-accelerating gas source; 116-a gas heating system; 121-a laser; 200, a roller blank; 300-powder; 310-micro-nano structured coating.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below. The specific conditions are not noted in the examples and are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or apparatus used were conventional products commercially available without the manufacturer's attention.
The skin-feel artificial leather has thick and soft hand feeling and good rebound resilience, and is widely applied to furniture sofas, decorative soft bags, automobile seats, automobile inner decorations, daily necessities and the like. The calender roll with the micro-nano double-scale structure on the surface is one of key components for preparing the skin-feel artificial leather, but the calender roll with the micro-nano double-scale structure on the surface is prepared at present mainly by using two methods of laser engraving and corrosion engraving, and the method has the problems of incapability of stably forming the micro-nano double-scale structure, short service life, low bonding strength of a coating, easiness in falling off, low embossing speed, poor structure third dimension, limited roll surface size, uneven large-area preparation, low manufacturing efficiency, high maintenance and manufacturing cost of equipment and the like, so that a new calender roll preparation method is needed to overcome the problems.
The inventor finds that the micro-nano structure coating can be formed by spraying the powder with the micro-nano double-scale structure on the surface of the roller blank, but the powder can carry larger kinetic energy in the spraying process aiming at the roller blank with larger hardness, and when the powder is sprayed on the surface of the roller blank with high hardness, the powder is easy to deform or even fall off, and cannot be adhered on the surface of the roller blank.
In a first aspect, the present invention provides a method for preparing a calender roll for skin-feel leather manufacture, comprising impinging powder having a micro-nano double-scale structure onto a preheated surface of a calender roll blank using a cylindrical flow nozzle, such that an impinging surface of the powder is melted on the surface of the calender roll blank, and then welding to form a micro-nano structured coating; the hardness of the calendaring roller blank is 200-700Hv.
The powder with the micro-nano double-scale structure is three-dimensional powder with a plurality of tree branches on the surface, and due to the special form of the powder, after the powder is attached to the surface of a substrate, the surface of the substrate can form an uneven micro-nano structure coating, and the coating can greatly promote the texture formation and touch texture of leather.
The powder with the micro-nano double-scale structure is sprayed out through the cylindrical flow nozzle, and the kinetic energy of the powder with the micro-nano double-scale structure is lower due to the lower spraying speed of the cylindrical flow nozzle, so that the powder cannot deform when contacting the surface of the roller blank, and the impact surface of the powder is melted on the surface of the roller blank by utilizing the preheated surface temperature of the roller blank, so that the micro-nano structure coating is formed by welding. According to the invention, the surface of the rolling roller blank is preheated, so that powder with a micro-nano double-scale structure passing through the cylindrical flow nozzle is accelerated and heated, and when the powder impacts the surface of the rolling roller blank, the kinetic energy of the powder is converted into internal energy, so that the contact end of the powder with the micro-nano double-scale structure and the roller blank is melted and welded on the surface of the rolling roller blank. When a large amount of powder is welded to the surface of the roller blank, a micro-nano structure coating layer 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 of the leather is optimized.
In an alternative embodiment, in order to enable the powder with the micro-nano double-scale structure to be stably welded on the surface of the roller blank, the powder is ensured to be melted only at the contact surface contacted with the roller blank, so that a preferable micro-nano structure coating is formed, and 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 calender roll blank by laser. In other embodiments, the preheating may be performed by electric heating, flame heating, or the like, as long as the roller blank can be preheated to a predetermined temperature, which is not limited by the present invention.
Preferably, the calendaring roller blank is made of carbon steel, the hardness of the carbon steel is high, the cost is low, the calendaring roller blank is one of important materials for preparing the calendaring roller blank, and the calendaring roller blank has a certain limiting effect on the formation of micro-nano structure coating on the surface due to the excessively high hardness. The invention solves the problem that the surface of the carbon steel calendaring roller blank is difficult to form a micro-nano structure coating with a better structure by preheating the surface of the roller blank and spraying powder with a micro-nano double-scale structure by a cylindrical flow nozzle at low speed.
In alternative embodiments, to impart excellent overall properties to the micro-nano structured coating, such as corrosion resistance, oxidation resistance, heat resistance, low stress abrasive wear resistance, etc., the powder having a micro-nano double scale structure comprises a pure nickel powder having a micro-nano two-dimensional structure or a nickel-based powder having a micro-nano two-dimensional structure.
In an alternative embodiment, the powder with the micro-nano double-scale structure needs to be heated before being impacted, and the heating temperature is 100-200 ℃ lower than the melting point of the powder.
Preferably, the powder impacts at a velocity of 50 to 100m/s and the average particle size of the powder is 60 to 200. Mu.m.
When the impact speed of the powder exceeds the range, the kinetic energy of the powder is increased, and the powder is easy to deform or even fall off when impacting on the surface of a high-hardness roller blank, so that a micro-nano structure coating with a better structure is difficult to form on the surface of the roller blank; when the striking speed of the powder is less than the above range, the kinetic energy of the powder is reduced, the powder cannot reach the surface of the roll blank, and the micro-nano structured coating cannot be formed.
The melting temperature of the powder is higher than the above range, so that the surface structure of the powder is damaged, the powder does not have a micro-nano double-scale structure, and when the powder is welded on the surface of a roller blank, a micro-nano structure coating cannot be formed; when the melting temperature of the powder is lower than the above range, the welding strength of the powder to the roll compact is low and the micro-nano structured coating is unstable.
In an alternative embodiment, in order to ensure the surface smoothness of the roller blank, reduce the residual stress on the surface of the roller blank, ensure the welding stability of the powder with a micro-nano double-scale structure and the roller blank, and pre-heat the calendaring roller blank and further comprise the pretreatment of reducing the roughness of the calendaring roller blank.
Preferably, the surface roughness of the pretreated calender roll blank is less than 2 mu m, and the inventor finds that reducing the roughness to the range can improve the stability of welding the powder with the micro-nano double-scale structure and the roll blank.
Preferably, the pretreatment includes sanding with sand paper and polishing with diamond polishing tape.
Preferably, in order to remove the scraps remained on the surface of the roller blank in the pretreatment process, the surface of the roller blank after the pretreatment is ensured to be free of impurities, and the roller blank after the pretreatment is also required to be cleaned; more preferably, the washing is performed with alcohol.
In a second aspect, the present invention provides a system for preparing a calender roll for skin-feel leather manufacturing, suitable for use in the preparation method according to any one of the preceding embodiments, comprising a powder emitting unit and a roll-blank preheating unit. The powder emitting unit is provided with a cylindrical flow nozzle for spraying powder with a micro-nano double-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 emitting 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 and carrier gas with a micro-nano double-scale structure into the column flow nozzle; the powder feeding air source is connected with the powder feeding system, and is used for conveying the powder with the micro-nano double-scale structure to the powder feeding system, and the powder feeding system is communicated with the powder heating system and is used for conveying the powder with the micro-nano double-scale structure to the powder heating system for heating; the accelerating air 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 comprises any one of nitrogen, argon or helium;
preferably, the heating temperature of the powder is 100-200deg.C below the melting point of the powder, and the heating temperature of the carrier gas is 500-1500deg.C.
The invention provides a preparation system of a calendaring roller for manufacturing skin-feel leather, which comprises the following working procedures:
and heating the calendaring roller blank by a laser, and keeping the surface temperature of the roller blank to be 100-500 ℃ lower than the melting point of the powder.
The powder with the micro-nano double-scale structure is conveyed to a powder conveying system through a powder conveying air source, the powder is further conveyed into a powder heating system, the powder is heated, the heating temperature is 100-200 ℃ lower than the melting point of the powder, carrier gas enters the gas heating system for heating after acceleration, the heating temperature is 500-1500 ℃, the heated powder and the carrier gas enter a cylindrical flow nozzle, the powder is sprayed out after acceleration through the nozzle and reaches the surface of a preheated roller blank, kinetic energy of the powder is converted into internal energy so that the powder is fused with the surface contacted with the roller blank, the powder is welded to the surface of the roller blank, and when a large amount of powder is welded to the surface of the roller blank, a micro-nano structure coating with a better shape is formed on the surface of the calendaring roller blank.
In a third aspect, the present invention provides a calender roll for skin-feel leather manufacture comprising a calender roll blank and a micro-nano structured coating formed on a surface thereof, made by the method of any of the preceding embodiments or by the system of any of the preceding embodiments.
In an alternative embodiment, in order to ensure the stability of the powder with the micro-nano double-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 more than 30MPa, and the thickness of the micro-nano structure coating is 40-160 mu m.
In a fourth aspect, the present invention provides the use of a calender roll for skin-feel leather manufacture as prepared in any of the preceding embodiments in the field of leather preparation.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Example 1
Referring to fig. 1, the present embodiment provides a system 100 for preparing a calendaring roller for skin-feel leather manufacture, which comprises a powder emitting unit and a roller blank preheating unit.
The powder emitting unit is provided with a cylindrical flow nozzle 111 for spraying powder 300 with a micro-nano double-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 preheat the roller blank 200 to the surface of the roller blank 200.
In this embodiment, the powder emitting unit further includes a powder feed gas source 112, a powder feed 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 connected with the column flow nozzle 111, and are used for inputting heated powder 300 with a micro-nano double-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 double-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 double-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 fed 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 calendaring roller for skin-feel leather manufacture, which comprises the following working procedures:
the calender roll bar 200 is heated by a laser 121, and the temperature of the surface of the roll bar 200 is kept at 1250 ℃ which is the melting point of the powder 300 with the micro-nano double-scale structure.
As shown in fig. 1, the powder feeding air source 112 conveys the powder 300 with the micro-nano double-scale structure to the powder feeding system 113, and then the powder 300 is further fed into the powder heating system 114 to heat the powder 300, the carrier gas is accelerated and then fed into the gas heating system 116 to be heated, the heated powder 300 and the carrier gas enter the post flow nozzle 111, the powder 300 is accelerated and then sprayed out through the post flow nozzle 111, as shown in fig. 2, the powder 300 reaches the surface of the preheated roll blank 200, the kinetic energy of the powder 300 is converted into energy which can further enable the surface of the powder 300 in contact with the roll blank 200 to be melted, the powder 300 is welded to the surface of the roll blank 200, and when a large amount of powder 300 is welded to the surface of the roll blank 200, a micro-nano structure coating 310 with a good shape is formed on the surface of the calendaring roll blank 200.
Example 2
This example provides a calender roll for skin-feel leather manufacture, the preparation method of which is applicable to the system of example 1, and the specific preparation method is as follows:
s1, pretreatment of a calendaring roller blank
And (3) polishing and polishing the 20# steel roller blank by using sand paper and a diamond polishing belt to ensure that the surface roughness of the carbon steel roller blank reaches 1.5 mu m, and then cleaning the surface of the roller blank by using alcohol to remove the scraps remained on the surface of the roller blank in the pretreatment process, so that the surface of the roller blank after the treatment is free from impurities.
S2, formation of micro-nano structure coating
And (3) placing the roller blank obtained in the step (S1) on a rotary table, reserving a region to be coated, protecting other regions on the surface of the roller blank by using adhesive tapes and tools, fixing the roller blank on the rotary table, clamping the roller blank without loosening, and rotating the roller blank at a constant speed when the rotary table rotates.
The region of the calender roll blank to be coated is preheated by laser, and the preheating temperature of the roll blank is 1250 ℃. The powder with the micro-nano double-scale structure is impacted to the surface of a preheated calendaring roller blank by using a cylindrical flow nozzle, the kinetic energy of the powder is converted into internal energy, the temperature of the impact part of the powder and the calendaring roller blank is increased, when the temperature of the impact part exceeds 1460 ℃, the impact surface of the powder is melted, a large amount of powder is welded to the surface of the roller blank along with continuous deposition of the powder, and then the coating with the thickness of 80 mu m micro-nano structure is formed by welding, and the microstructure of the coating is shown in figure 3.
In this example, the micro-scale chromium zirconium nickel based powder having a micro-nano double scale structure had a particle size of 90 μm, a powder striking speed of 100m/s, a heating temperature of 1250 ℃, and a microstructure of the powder as shown in fig. 4.
Comparative example 1
This comparative example provides a calender roll for skin-feel leather production, which is prepared in the same way as in example 1, except that the roll stock temperature is normal temperature, and laser heating is not performed.
Because the hardness of the roller blank is high, the powder with the micro-nano double-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 calender roll for skin-feel leather manufacture, which is prepared in the same way as example 1, except that when powder hits the surface of the roll blank, the powder is normal temperature powder, and heating is not performed.
Because the temperature of the powder is too low, after the kinetic energy of the powder is converted into internal energy, the powder is still insufficient to melt 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 3
This comparative example provides a calender roll for skin-feel leather manufacture, which is prepared in the same way as example 1, except that a Laval nozzle is used to accelerate the powder to 600m/s impact on the surface of the roll blank.
Because the speed of the powder is high, the kinetic energy of the powder is greatly converted into internal energy, so that the powder particles are integrally softened and collapsed, the micro-nano two-dimensional structure of the powder is destroyed, and a micro-nano structure coating can not be formed on the surface of the roller blank.
Comparative example 4
This comparative example provides a calender roll for skin-feel leather manufacture, which is prepared in the same way as example 1, except that a conventional spherical powder is used.
Because 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 calender roll for skin-feel leather manufacture, which is prepared in the same way as example 1, except that a ceramic roll blank is used as the calender roll blank.
Because the hardness of the roller blank of the ceramic 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, and the preparation method, the system and the application thereof provided by the invention have at least the following advantages:
the powder with the micro-nano double-scale structure is sprayed out through the cylindrical flow nozzle, and the kinetic energy of the powder with the micro-nano double-scale structure is lower due to the lower spraying speed of the cylindrical flow nozzle, so that the powder cannot deform when contacting the surface of the roller blank, and the impact surface of the powder is melted on the surface of the roller blank by utilizing the preheated surface temperature of the roller blank, so that the micro-nano structure coating is formed by welding. According to the invention, the surface of the rolling roller blank is preheated, so that powder with a micro-nano double-scale structure passing through the cylindrical flow nozzle is accelerated and heated, and when the powder impacts the surface of the rolling roller blank, the kinetic energy of the powder is converted into internal energy, so that the contact end of the powder with the micro-nano double-scale structure and the roller blank is melted and welded on the surface of the rolling roller blank. When a large amount of powder is welded to the surface of the roller blank, a micro-nano structure coating layer 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 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, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. The preparation method of the calendaring roller for manufacturing skin-feel leather is characterized by comprising the steps of using a cylindrical flow nozzle to impact powder with a micro-nano double-scale structure to the surface of a preheated calendaring roller blank, so that the impact surface of the powder is melted on the surface of the calendaring roller blank, and then welding to form a micro-nano structure coating;
the hardness of the rolling roller blank is 200-700Hv;
the powder with the micro-nano double-scale structure needs to be heated before impact, and the heating temperature is less than 100-200 ℃ of the melting point of the powder; the powder impact speed is 50-100 m/s.
2. The method of claim 1, wherein the preheating is at a temperature of less than 100-500 ℃ of the melting point of the powder.
3. The method according to claim 2, wherein the preheating is preheating the calender roll blank by a laser.
4. A method of making as claimed in claim 3 wherein the calender roll blank is carbon steel.
5. The method of claim 1, wherein the powder having a micro-nano double-scale structure comprises a pure nickel powder having a micro-nano two-dimensional structure or a nickel-based powder having a micro-nano two-dimensional structure.
6. The method according to any one of claims 2 to 5, wherein the pre-heating of the rolled roll blank further comprises a pre-treatment for reducing the roughness of the rolled roll blank.
7. The method according to claim 6, wherein the surface roughness of the pretreated rolled blank is less than 2 μm.
8. The method of claim 6, wherein the pre-treatment comprises sanding and polishing, the sanding being with sandpaper and the polishing being with a diamond polishing belt.
9. The method according to claim 6, wherein the pretreated roll stock of the calender roll is washed with alcohol.
10. A calender roll for skin-feel leather manufacturing, which is manufactured by the manufacturing method according to any one of claims 1 to 9, characterized by comprising a calender roll blank and the micro-nano structured coating formed on the surface thereof.
11. The calender roll defined in claim 10, wherein the bond strength of the micro-nano structured coating to the roll blank is greater than 30MPa and the micro-nano structured coating has a thickness of 40-160 μιη.
12. Use of a calender roll according to claim 10 or 11 in the field of leather preparation.
CN202210330767.5A 2022-03-30 2022-03-30 Calendering roller for manufacturing skin-feel leather and preparation method and application thereof Active CN114672798B (en)

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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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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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