CN115233467B - Multi-layer buffing for polishing optical glass and preparation method thereof - Google Patents

Multi-layer buffing for polishing optical glass and preparation method thereof Download PDF

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Publication number
CN115233467B
CN115233467B CN202110445843.2A CN202110445843A CN115233467B CN 115233467 B CN115233467 B CN 115233467B CN 202110445843 A CN202110445843 A CN 202110445843A CN 115233467 B CN115233467 B CN 115233467B
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China
Prior art keywords
polyurethane
dmf
layer
skin
polishing
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CN115233467A (en
Inventor
张草
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Suzhou Sanding Textile Technology Co ltd
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Suzhou Sanding Textile Technology Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • 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
    • D06N3/0002—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
    • D06N3/0011—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 non-woven fabrics
    • 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
    • D06N3/0002—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
    • D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
    • 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
    • D06N3/0002—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
    • D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0034—Polyamide fibres
    • 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
    • D06N3/0002—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
    • D06N3/0015—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 fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0036—Polyester fibres
    • 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
    • D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
    • D06N3/0095—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by inversion technique; by transfer processes
    • D06N3/0097—Release surface, e.g. separation sheets; Silicone papers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/145—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 two or more layers of polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/02—Natural fibres, other than mineral fibres
    • D06M2101/04—Vegetal fibres
    • D06M2101/06—Vegetal fibres cellulosic
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/32—Polyesters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
    • D06M2101/16—Synthetic fibres, other than mineral fibres
    • D06M2101/30—Synthetic polymers consisting of macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M2101/34—Polyamides
    • 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
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/04—Vegetal fibres
    • D06N2201/042—Cellulose fibres, e.g. cotton
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1635—Elasticity
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/16—Properties of the materials having other properties
    • D06N2209/1685—Wear resistance
    • 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
    • D06N2213/00—Others characteristics
    • D06N2213/03—Fibrous web coated on one side with at least two layers of the same polymer type, e.g. two coatings of polyolefin

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The utility model relates to optical glass, in particular to a multi-layer leather for polishing (e.g. fine polishing) of glass for a mobile phone, which has great improvement on wear resistance, rebound resilience and surface flatness of the polished glass by compounding at least one layer of wet polyurethane coating on the leather layer.

Description

Multi-layer buffing for polishing optical glass and preparation method thereof
Technical Field
The utility model relates to the field of glass polishing, in particular to a multi-layer buffing for optical glass polishing and a preparation method thereof.
Background
The polishing process of optical glass, such as glass for mobile phones, mainly comprises thinning, fine polishing and polishing. In the prior art, the thinning process mainly uses pure polyurethane polishing leather, and the polishing process mainly uses damping cloth. The polishing process mainly uses base cloth impregnated polyurethane prepared from terylene as a main component to prepare the polished leather, and the polished leather has short wear-resisting service life and poor rebound resilience. For example, CN1140118A discloses a polishing cloth for silicon chips, wherein the main component of the base cloth is terylene, and the polishing cloth also contains a small amount of chlorlon, chinlon, viscose fiber and acrylic fiber, and if the polishing skin prepared by the polishing cloth is used for polishing glass for mobile phones, the working time (for example, refer to a brush disclosed in 201920821079.2 chinese patent) is shorter than 24 hours, and the lodging phenomenon is easy to occur; CN109518356a discloses a base cloth for polishing leather, which is also made of terylene, contains a small amount of viscose and nylon, and uses the prepared leather to polish the glass for the mobile phone, while the service life is longer than that of CN1140118A, the service life is still shorter, the polishing time is about 24 hours (for example, refer to the brush disclosed in patent No. 201920821079.2 of chinese utility model), the rebound resilience is poor, the surface flatness of the polished planar glass is about 3-4 μm, especially in the polishing of the glass for the 3D mobile phone, the phenomenon that the groove is not polished occurs, and the yield of the polished glass is reduced. In addition, because three processes of thinning, fine polishing and polishing use different consumables, staged operation is required, so that the processes are complicated, the efficiency is low, and the cost is high. Therefore, the prior art needs to have longer wear-resisting life and good rebound resilience, can be used for polishing the surface and the 3D optical glass at the same time, and can preferably combine three procedures of thinning, polishing and polishing of the optical glass into one procedure.
Disclosure of Invention
The utility model aims to provide a multi-layer polishing skin for polishing (such as fine polishing) of optical glass, especially glass for mobile phones, wherein the multi-layer polishing skin has great improvement on wear resistance, rebound resilience and surface evenness of polished glass by compounding at least one layer of wet polyurethane coating on a polishing skin layer, and in addition, after further compounding one layer of dry polyurethane coating, the removal amount can be increased, the polishing time can be saved, the production efficiency can be improved, and in particular, the optical glass can be thinned and polished after being manufactured into a brush (such as the brush disclosed by the Chinese patent reference 201920821079.2), so that the three processes of thinning, fine polishing and polishing can be combined into one process.
According to one aspect of the present utility model there is provided a multi-layer skin for optical glass polishing (e.g. finishing) comprising a skin layer and at least one wet polyurethane coating, the skin layer being made by impregnating a substrate with a composition comprising polyurethane and DMF (i.e. N, N-dimethylformamide) and removing DMF, the substrate comprising, in weight percent: 55-95% of nylon fiber, 0-40% of polyester fiber and 0-20% of viscose fiber; preferably, the components are calculated by weight percent: 55-95% of nylon fiber, 0-40% of polyester fiber and 0-20% of viscose fiber; more preferably, 65-75% of nylon fibers, 15-25% of polyester fibers and 5-15% of viscose fibers.
According to the invention, the base fabric can be prepared by adopting a needled non-woven fabric manufacturing process.
In a specific embodiment, the multi-layer skin of the present invention comprises a skin layer and a wet polyurethane coating on one side of the skin layer; more preferably, the multi-layer skin consists of a skin layer and a wet polyurethane coating layer on one side of the skin layer.
In another specific embodiment, the multi-layer skin of the present invention comprises a skin layer and a wet polyurethane coating on both sides of the skin layer; more preferably, the multi-layer skin consists of a skin layer and a wet polyurethane coating layer on both sides of the skin layer.
In another specific embodiment, the multi-layer skin of the present invention comprises a skin layer, a wet polyurethane coating on one side of the skin layer, and a dry polyurethane coating on the other side of the skin layer; more preferably, the multi-layer skin consists of a skin layer, a wet polyurethane coating on one side of the skin layer, and a dry polyurethane coating on the other side of the skin layer.
It will be appreciated by those skilled in the art that the thickness of the double skin may be selected as desired and may be achieved by, for example, selecting base fabrics, wet polyurethane coatings and dry polyurethane coatings of different thicknesses. Preferably, the thickness of the double-layer skin is 0.5-6mm. Preferably, the thickness of the abrasive sheet layer is 0.3 to 5.9mm, more preferably 1.0 to 3.2mm; the thickness of the wet polyurethane coating is 0.1-3mm, more preferably 0.4-1.2mm; the dry polyurethane coating has a thickness of 0.1 to 3mm, more preferably 0.4 to 1.2mm.
According to the invention, a wet-process polyurethane coating is prepared by introducing a coating formed by a composition containing polyurethane and DMF into a coagulation tank, and solidifying the polyurethane by reducing DMF in the coagulation tank by mutual dissolution of water in the coagulation tank and DMF; then the water enters a water washing tank, and DMF is removed through water washing; finally heating at 110-150deg.C (preferably 15-20 min) to remove water.
According to the invention, a dry polyurethane coating is prepared by heating a coating formed from a composition comprising polyurethane and DMF at 110-150℃for preferably 15-20 minutes to remove DMF.
In a specific embodiment, the composition comprising polyurethane and DMF contains, in weight percent: 8-25% of polyurethane with the elastic modulus of 50-60, 8-25% of polyurethane with the elastic modulus of 80-100 and 50-80% of DMF; more preferably, the components are calculated by weight percent: 8-25% of polyurethane with the elastic modulus of 50-60, 8-25% of polyurethane with the elastic modulus of 80-100 and 50-80% of DMF; more preferably, the polyurethane with the elastic modulus of 50-60 is 15-20%, the polyurethane with the elastic modulus of 80-100 is 15-20%, and the DMF is 60-70%; more preferably, the polyurethane with the elastic modulus of 55 is 15-20%, the polyurethane with the elastic modulus of 95 is 15-20%, and the DMF is 60-70%.
In another specific embodiment, the composition comprising polyurethane and DMF contains, in weight percent: 15-35% of polyurethane with the elastic modulus of 55-65, 3-15% of polyurethane with the elastic modulus of 230-250 and 50-80% of DMF; more preferably, the components are calculated by weight percent: 15-35% of polyurethane with the elastic modulus of 55-65, 3-15% of polyurethane with the elastic modulus of 230-250 and 50-80% of DMF; more preferably, the polyurethane with the elastic modulus of 55-65 is 20-30%, the polyurethane with the elastic modulus of 230-250 is 5-10% and the DMF is 60-70%; more preferably, the polyurethane with elastic modulus of 60 is 20-30%, the polyurethane with elastic modulus of 240 is 5-10%, and DMF is 60-70%.
According to the invention, the weight percentage of the base cloth in the multi-layer skin grinding is 25-60%, and the weight percentage of the polyurethane is 40-75%.
According to another aspect of the present invention, the present invention provides a method for preparing the wet polyurethane coating, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper;
(3) Entering a solidification tank, and reducing DMF in the water and DMF in the solidification tank by mutual dissolution to solidify polyurethane; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C (preferably 15-20 min) to remove water; and removing the release paper to obtain the wet polyurethane coating.
According to another aspect of the present invention, there is provided a method for preparing the above dry polyurethane coating, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper;
(3) Heating at 110-150deg.C (preferably 15-20 min) to remove DMF; and removing the release paper to obtain the dry polyurethane coating.
According to another aspect of the present invention, the present invention provides a method for preparing the above-mentioned multi-layer skin for polishing optical glass, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Removing DMF to obtain a grinding skin layer;
(4) Compounding one surface of the grinding skin layer and the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with the wet polyurethane coating on one surface; or compounding the two sides of the grinding skin layer with the wet polyurethane coating into a whole by a compounding machine to obtain a multi-layer grinding skin with the wet polyurethane coating on the two sides; or compounding one surface of the grinding skin layer with the wet polyurethane coating and the other surface with the dry polyurethane coating into a whole by using a compounding machine to obtain the multi-layer grinding skin with the wet polyurethane coating on one surface and the dry polyurethane coating on the other surface.
In a preferred embodiment, in step (3), the substrate impregnated with the composition comprising polyurethane and DMF is fed into a coagulation tank, the DMF therein is reduced by mutual dissolution of water in the coagulation tank and DMF, and the polyurethane is coagulated; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C (preferably 15-20 min) to remove water.
According to another aspect of the present invention, the present invention provides a method for preparing the above-mentioned multi-layer skin for polishing optical glass, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Feeding a substrate impregnated with a composition containing polyurethane and DMF under a precision coater, controlling a distance between the precision coater and the substrate impregnated with the composition containing polyurethane and DMF, and allowing the substrate impregnated with the composition containing polyurethane and DMF to advance at a uniform speed so as to form a coating layer of the composition containing polyurethane and DMF on one side of the substrate impregnated with the composition containing polyurethane and DMF;
(4) Entering a solidification tank, and reducing DMF in the water and DMF in the solidification tank by mutual dissolution to solidify polyurethane; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C (preferably 15-20 min) to remove water to obtain multi-layer skin with wet polyurethane coating on one side.
According to another aspect of the present invention, the present invention provides a method for preparing the above-mentioned multi-layer skin for polishing optical glass, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Feeding a substrate impregnated with a composition containing polyurethane and DMF under a precision coater, controlling a distance between the precision coater and the substrate impregnated with the composition containing polyurethane and DMF, and allowing the substrate impregnated with the composition containing polyurethane and DMF to advance at a uniform speed so as to form a coating layer of the composition containing polyurethane and DMF on one side of the substrate impregnated with the composition containing polyurethane and DMF;
(4) Entering a solidification tank, and reducing DMF in the water and DMF in the solidification tank by mutual dissolution to solidify polyurethane; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C (preferably 15-20 min) to remove water to obtain multi-layer skin with wet polyurethane coating on one side;
(5) Compounding the other side of the double-layer leather with the wet polyurethane coating on one side with the wet polyurethane coating into a whole by using a compounding machine to obtain the double-layer leather with the wet polyurethane coating on both sides; or compounding the other side of the double-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating into a whole by a compounding machine to obtain the double-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating on the other side.
It will be appreciated by those skilled in the art that an adhesive, such as a hot melt adhesive, may be used as a medium to combine the skin and coating into one piece using a compounding machine.
It will be appreciated by those skilled in the art that various optical glasses may be polished with the multiple layer polishing of the present invention, particularly for cell phone glasses, camera lens glasses, touchable device cover glasses, and the like, cell phone glasses such as 2D cell phone glasses, 3D cell phone glasses.
According to another aspect of the present invention, there is provided the use of the above-mentioned multi-layer skin for optical glass polishing in the preparation of a brush for optical glass polishing.
According to another aspect of the present invention, there is provided a brush for polishing an optical glass, which is produced by the above-mentioned multi-layer polishing for polishing an optical glass.
According to another aspect of the present utility model, there is provided an optical glass polisher, using the brush for polishing an optical glass described above.
According to another aspect of the present utility model, there is provided an optical glass polishing method using the brush for optical glass polishing described above.
In the utility model, at least one layer of wet polyurethane coating is compounded on the grinding skin layer, so that the wear resistance and rebound resilience of the compound grinding skin layer and the flatness of the polished glass surface are improved, in addition, after a layer of dry polyurethane coating is further compounded, the removal amount can be increased, and particularly, the optical glass can be thinned and polished after the compound grinding skin layer is made into a brush (for example, the brush disclosed by the Chinese patent publication No. 201920821079.2), so that the three procedures of thinning, fine polishing and polishing are combined into one procedure. It is known to those skilled in the art that the breaking strength of the polyester fiber is 3.5 to 3.8cN/dtex and the breaking strength of the nylon fiber is 3.8 to 4.0cN/dtex when the thickness is 2.5dtex, so that the abrasion resistance of the nylon fiber is about 10% higher than that of the polyester fiber. However, the present utility model has found that when the main component of the base fabric is nylon fiber, the man-hours of use (for example, refer to the brush disclosed in the patent of the utility model of China No. 201920821079.2) are greatly improved. In addition, the polishing pad has better rebound resilience, the polishing pad with the nylon fiber serving as the main component of the base cloth becomes flexible and elastic after absorbing polishing liquid in the polishing process, and the surface flatness difference of the planar glass after polishing glass is about 1-2 mu m, which is obviously superior to the polishing pad with the polyester fiber serving as the main component of the base cloth, so that the polished glass is more resistant to falling and can be used for polishing planar and 3D optical glass at the same time.
Detailed Description
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications of the invention will become apparent to those skilled in the art upon reading the description herein, and such equivalents are intended to fall within the scope of the invention as defined by the appended claims.
Comparative example 1
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The polyurethane composition comprises, by weight, 2 parts of polyurethane with an elastic modulus of 55, 2 parts of polyurethane with an elastic modulus of 95 and 8 parts of solvent DMF.
3. Preparation of the skin
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 110deg.C for 20 min to remove water, and rolling to obtain polyurethane polished skin with thickness of about 3.1mm, wherein the weight percentage of the base cloth is about 71.3% and the weight percentage of polyurethane is about 28.7%.
The Shore C hardness of the polyurethane leather is measured to be about 73 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); reference 201920821079.2 Chinese utility modelThe use time of the brush made by the model patent is about 132 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.5 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 1
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The polyurethane composition comprises, by weight, 2 parts of polyurethane with an elastic modulus of 55, 2 parts of polyurethane with an elastic modulus of 95 and 8 parts of solvent DMF.
3. Preparation of Multi-layer skin-grinding having a Wet polyurethane coating on one side
Fully impregnating the base cloth with a composition containing polyurethane and DMF, entering the lower part of a precise coating knife, controlling the distance between the precise coating knife and the base cloth, and enabling the base cloth to have enough composition containing polyurethane and DMF so as to enable the base cloth to advance at a uniform speed, and forming a layer of coating of the composition containing polyurethane and DMF on one side of the base cloth; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 110 ℃ for 20 minutes to remove water, and rolling to obtain a multi-layer leather with a wet polyurethane coating on one side, wherein the thickness of the leather is about 3.1mm, the thickness of the leather is about 2.0mm, and the thickness of the wet polyurethane coating is about 1.1mm; the weight percent of the base fabric was about 49.6% and the weight percent of the polyurethane was about 50.4%.
The Shore C hardness of the polyurethane leather is measured to be about 73.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 145 hours; using fully-automatic laser measuring instrumentsDetecting the flatness of the surface of the glass, taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.1 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 21 μm using a fully automatic laser measuring instrument.
Example 2
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. A composition containing polyurethane and DMF was formulated as in example 1.
3. Preparation of the abrasive skin layer
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; and (3) putting the obtained product into an oven with the temperature of 110 ℃, heating for 20 minutes to remove water, and rolling to obtain the polyurethane grinding skin layer with the thickness of about 2.0mm.
4. Preparation of wet polyurethane coatings
The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 110 deg.C for 20 min to remove water; and removing the release paper, and rolling to obtain the wet polyurethane coating, wherein the thickness of the wet polyurethane coating is about 1.1mm.
5. Preparation of Multi-layer skin-grinding having a Wet polyurethane coating on one side
And compounding one surface of the grinding skin layer and the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with one surface provided with the wet polyurethane coating, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 49.5%, and the weight percentage of the polyurethane is about 50.5%.
The Shore C hardness of the polyurethane leather is measured to be about 73.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent 201920821079.2 is about 144 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.0 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 3
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. A composition containing polyurethane and DMF was formulated as in example 1.
3. A double-layer skin-polishing process with a wet-process polyurethane coating on one side was prepared in the same manner as in example 1, with a thickness of about 2.0mm, wherein the thickness of the skin-polishing layer was about 1.0mm and the thickness of the wet-process polyurethane coating was about 1.0mm.
4. A wet polyurethane coating was prepared in the same manner as in example 2 and a thickness of about 1.1mm.
5. Preparation of double-layer skin-grinding with wet polyurethane coating on both sides
And compounding the other side of the multi-layer leather with the wet polyurethane coating on one side with the wet polyurethane coating into a whole by using a compounding machine to obtain the multi-layer leather with the wet polyurethane coating on both sides, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 30.7%, and the weight percentage of the polyurethane is about 69.3%.
The Shore C hardness of the polyurethane leather is measured to be about 73.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the brush made by the Chinese patent 201920821079.2 takes about 159 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 In the inner part10 points, measuring the glass thickness of each point, wherein the difference of the surface flatness of the polished glass is about 0.8 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 19 μm using a fully automatic laser measuring instrument.
Example 4
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. A composition containing polyurethane and DMF was formulated as in example 1.
3. The abrasive sheet was prepared by the same procedure as in example 2, with a thickness of about 1.0mm.
4. A wet polyurethane coating was prepared in the same manner as in example 2 and a thickness of about 1.0mm.
5. Preparation of Dry polyurethane coatings
The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper; heating in an oven at 110 ℃ for 20 minutes to remove DMF; and removing the release paper, and rolling to obtain the dry polyurethane coating, wherein the thickness of the dry polyurethane coating is about 1.1mm.
6. Preparing a multi-layer skin-grinding layer with a wet polyurethane coating on one side and a dry polyurethane coating on the other side
And compounding one surface of the abrasive skin layer with the wet polyurethane coating and the other surface with the dry polyurethane coating into a whole by using a compounding machine to obtain a multi-layer abrasive skin with the wet polyurethane coating on one surface and the dry polyurethane coating on the other surface, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 29.8%, and the weight percentage of the polyurethane is about 70.2%.
The Shore C hardness of the polyurethane leather is measured to be about 73.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent 201920821079.2 is about 144 hours; glass surface flatness detection using fully automatic laser measuring instrumentIntegrity of 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.1 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 30 μm using a fully automatic laser measuring instrument.
Comparative example 2
1. A base fabric was prepared as in comparative example 1.
2. Formulation of a composition comprising polyurethane and DMF
The composition was prepared as a uniform composition by weight of 3 parts of polyurethane having an elastic modulus of 60, 1 part of polyurethane having an elastic modulus of 240, and 8 parts of solvent DMF.
3. The skin-abrasion process was the same as in comparative example 1, with a thickness of about 3.1mm, wherein the weight percent of the base fabric was about 71.5% and the weight percent of the polyurethane was about 28.5%.
The Shore C hardness of the polyurethane leather is measured to be about 74 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 120 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.6 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 21 μm using a fully automatic laser measuring instrument.
Example 5
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The composition was prepared as a uniform composition by weight of 3 parts of polyurethane having an elastic modulus of 60, 1 part of polyurethane having an elastic modulus of 240, and 8 parts of solvent DMF.
3. Preparing a multi-layer skin-grinding process with a wet-process polyurethane coating on one side, wherein the process is the same as that of example 1, and the thickness of the skin-grinding layer is about 3.1mm, and the thickness of the wet-process polyurethane coating is about 2.0mm and the thickness of the wet-process polyurethane coating is about 1.1mm; the weight percent of the base fabric was about 49.5% and the weight percent of the polyurethane was about 50.5%.
The Shore C hardness of the polyurethane leather is measured to be about 74 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 132 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.2 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 6
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. A composition containing polyurethane and DMF was formulated as in example 5.
3. A double-layer skin-polishing process with a wet-process polyurethane coating on one side was prepared in the same manner as in example 1, with a thickness of about 2.0mm, wherein the thickness of the skin-polishing layer was about 1.0mm and the thickness of the wet-process polyurethane coating was about 1.0mm.
4. A dry polyurethane coating was prepared, with a thickness of about 1.1mm, in the same manner as in example 4.
5. Preparing a multi-layer skin-grinding layer with a wet polyurethane coating on one side and a dry polyurethane coating on the other side
And compounding the other side of the multi-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating into a whole by using a compounding machine to obtain the multi-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating on the other side, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 30.2%, and the weight percentage of the polyurethane is about 69.8%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); reference 201920821079.2 Chinese utility modelThe time of use of the brush is about 132 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.2 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 31 μm using a fully automatic laser measuring instrument.
Example 7
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of nylon fiber, 20 weight percent of polyester fiber and 10 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. A composition containing polyurethane and DMF was formulated as in example 5.
3. The abrasive sheet was prepared by the same procedure as in example 2, with a thickness of about 1.0mm.
4. A wet polyurethane coating was prepared in the same manner as in example 2 and a thickness of about 1.05mm.
5. Preparation of double-layer skin-grinding with wet polyurethane coating on both sides
And compounding the two sides of the grinding skin layer with the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with the wet polyurethane coating on the two sides, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 30.5%, and the weight percentage of the polyurethane is about 69.5%.
The Shore C hardness of the polyurethane leather is measured to be about 74 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 145 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 0.9 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 21 μm using a fully automatic laser measuring instrument.
Comparative example 3
1. Preparation of base cloth
The base fabric is prepared by adopting a needled non-woven fabric manufacturing process, wherein the weight percentage of the base fabric is 65% of nylon fiber, 30% of polyester fiber and 5% of viscose fiber.
2. Formulation of a composition comprising polyurethane and DMF
The polyurethane with the elastic modulus of 55 is 2.5 parts by weight, the polyurethane with the elastic modulus of 95 is 2.5 parts by weight, and the solvent DMF is 7 parts by weight, so as to prepare a uniform composition.
3. Preparation of the skin
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 120deg.C for 18 min to remove water, and rolling to obtain polyurethane polished skin with thickness of about 3.1mm, wherein the weight percentage of the base cloth is about 68.5%, and the weight percentage of polyurethane is about 31.5%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent 201920821079.2 is about 140 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.8 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 19 μm using a fully automatic laser measuring instrument.
Example 8
1. Preparation of base cloth
The base fabric is prepared by adopting a needled non-woven fabric manufacturing process, wherein the weight percentage of the base fabric is 65% of nylon fiber, 30% of polyester fiber and 5% of viscose fiber.
2. Formulation of a composition comprising polyurethane and DMF
The polyurethane with the elastic modulus of 55 is 2.5 parts by weight, the polyurethane with the elastic modulus of 95 is 2.5 parts by weight, and the solvent DMF is 7 parts by weight, so as to prepare a uniform composition.
3. Preparation of Multi-layer skin-grinding having a Wet polyurethane coating on one side
Fully impregnating the base cloth with a composition containing polyurethane and DMF, entering the lower part of a precise coating knife, controlling the distance between the precise coating knife and the base cloth, and enabling the base cloth to have enough composition containing polyurethane and DMF so as to enable the base cloth to advance at a uniform speed, and forming a layer of coating of the composition containing polyurethane and DMF on one side of the base cloth; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 120 ℃ for 18 minutes to remove water, and rolling to obtain a multi-layer leather with a wet polyurethane coating on one surface, wherein the thickness of the leather is about 3.1mm, the thickness of the leather is about 2.0mm, and the thickness of the wet polyurethane coating is about 1.1mm; the weight percent of the base fabric was about 47.3% and the weight percent of the polyurethane was about 52.7%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 154 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.3 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 9
1. Preparation of base cloth
The base fabric is prepared by adopting a needled non-woven fabric manufacturing process, wherein the weight percentage of the base fabric is 65% of nylon fiber, 30% of polyester fiber and 5% of viscose fiber.
2. A composition containing polyurethane and DMF was formulated as in example 8.
3. A double-layer skin-polishing layer with a wet-process polyurethane coating on one side was prepared in the same process as in example 8, wherein the thickness of the skin-polishing layer was about 1.0mm, and the thickness of the wet-process polyurethane coating was about 1.0mm.
4. Preparation of wet polyurethane coatings
The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 120deg.C for 18 min to remove water; and removing the release paper, and rolling to obtain the wet polyurethane coating, wherein the thickness of the wet polyurethane coating is about 1.1mm.
5. Preparation of double-layer skin-grinding with wet polyurethane coating on both sides
And compounding the other side of the multi-layer leather with the wet polyurethane coating on one side with the wet polyurethane coating into a whole by using a compounding machine to obtain the multi-layer leather with the wet polyurethane coating on both sides, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 27.5%, and the weight percentage of the polyurethane is about 72.5%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the working time of the brush manufactured by the Chinese patent of 201920821079.2 is about 169 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.0 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 19 μm using a fully automatic laser measuring instrument.
Comparative example 4
1. A base fabric was prepared as in comparative example 3.
2. Formulation of a composition comprising polyurethane and DMF
3.8 parts of polyurethane with an elastic modulus of 60, 1.2 parts of polyurethane with an elastic modulus of 240 and 7 parts of solvent DMF are prepared into a uniform composition in parts by weight.
3. The process was the same as that of comparative example 3, with a thickness of about 3.1mm, and the weight percent of the base fabric in the skin was about 68.7% and the weight percent of the polyurethane was about 31.3%.
The Shore C hardness of the polyurethane leather is measured to be about 73 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the time required for the brush made by the Chinese patent 201920821079.2 is about 127 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.6 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 10
1. Preparation of base cloth
The base fabric is prepared by adopting a needled non-woven fabric manufacturing process, wherein the weight percentage of the base fabric is 65% of nylon fiber, 30% of polyester fiber and 5% of viscose fiber.
2. Formulation of a composition comprising polyurethane and DMF
3.8 parts of polyurethane with an elastic modulus of 60, 1.2 parts of polyurethane with an elastic modulus of 240 and 7 parts of solvent DMF are prepared into a uniform composition in parts by weight.
3. Preparation of the abrasive skin layer
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; and (3) putting the obtained product into an oven with the temperature of 120 ℃, heating for 18 minutes to remove water, and rolling to obtain the polyurethane grinding skin layer with the thickness of about 2.0mm.
4. A wet polyurethane coating was prepared in the same manner as in example 9 and a thickness of about 1.1mm.
5. Preparation of Multi-layer skin-grinding having a Wet polyurethane coating on one side
And compounding one surface of the grinding skin layer and the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with one surface provided with the wet polyurethane coating, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 49.5%, and the weight percentage of the polyurethane is about 50.5%.
Using the shore hardness measurement method (complianceThe Shore C hardness of the polyurethane leather is about 73.5 degrees measured by national standard GB/T531, GB/T2489 and GB 2411); the time required for the brush made by the Chinese patent 201920821079.2 to be used is about 139 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.2 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 21 μm using a fully automatic laser measuring instrument.
Example 11
1. Preparation of base cloth
The base fabric is prepared by adopting a needled non-woven fabric manufacturing process, wherein the weight percentage of the base fabric is 65% of nylon fiber, 30% of polyester fiber and 5% of viscose fiber.
2. Preparation of a composition containing polyurethane and DMF, as in example 10
3. The abrasive sheet was prepared by the same procedure as in example 10, with a thickness of about 1.0mm.
4. A wet polyurethane coating was prepared in the same manner as in example 9 and a thickness of about 1.05mm.
5. Preparation of double-layer skin-grinding with wet polyurethane coating on both sides
And compounding the two sides of the grinding skin layer with the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with the wet polyurethane coating on the two sides, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 29.7%, and the weight percentage of the polyurethane is about 70.3%.
The Shore C hardness of the polyurethane leather is measured to be about 73.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 152 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 0.9 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Comparative example 5
1. Preparation of base cloth
The base fabric is prepared from 80 weight percent of nylon fiber, 15 weight percent of polyester fiber and 5 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The composition was prepared as a uniform composition by weight of 3 parts of polyurethane having an elastic modulus of 55, 3 parts of polyurethane having an elastic modulus of 95, and 6 parts of solvent DMF.
3. Preparation of the skin
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; and (3) putting the polyurethane into an oven with the temperature of 150 ℃ for heating for 15 minutes to remove water, and rolling to obtain the polyurethane polished leather with the thickness of about 3.1mm, wherein the weight percentage of the base cloth is about 63.3%, and the weight percentage of the polyurethane is about 36.7%.
The Shore C hardness of the polyurethane leather is measured to be about 74 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the time required for the brush made by the Chinese patent 201920821079.2 is about 148 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.4 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.
Example 12
1. Preparation of base cloth
The base fabric is prepared from 80 weight percent of nylon fiber, 15 weight percent of polyester fiber and 5 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The composition was prepared as a uniform composition by weight of 3 parts of polyurethane having an elastic modulus of 55, 3 parts of polyurethane having an elastic modulus of 95, and 6 parts of solvent DMF.
3. Preparation of Multi-layer skin-grinding having a Wet polyurethane coating on one side
Fully impregnating the base cloth with a composition containing polyurethane and DMF, entering the lower part of a precise coating knife, controlling the distance between the precise coating knife and the base cloth, and enabling the base cloth to have enough composition containing polyurethane and DMF so as to enable the base cloth to advance at a uniform speed, and forming a layer of coating of the composition containing polyurethane and DMF on one side of the base cloth; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; and (3) putting the mixture into an oven with the temperature of 150 ℃ for heating for 15 minutes to remove water, and rolling to obtain a multi-layer leather with a wet polyurethane coating on one side, wherein the thickness of the leather is about 2.7mm, the thickness of the leather is about 2.0mm, and the thickness of the wet polyurethane coating is about 0.7mm.
4. Preparation of Dry polyurethane coatings
The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper; heating in an oven at 150 ℃ for 15 minutes to remove DMF; and removing the release paper, and rolling to obtain the dry polyurethane coating with the thickness of about 0.4mm.
5. Preparing a multi-layer skin-grinding layer with a wet polyurethane coating on one side and a dry polyurethane coating on the other side
And compounding the other side of the multi-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating into a whole by using a compounding machine to obtain the multi-layer leather with the wet polyurethane coating on one side and the dry polyurethane coating on the other side, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 46.2%, and the weight percentage of the polyurethane is about 53.8%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the brush made by the Chinese patent 201920821079.2 takes about 158 hours; using all self-priming Dynamic laser measuring instrument detects the flatness of the glass surface, and 0.25cm is taken out 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.1 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 25 μm using a fully automatic laser measuring instrument.
Comparative example 6
1. A base fabric was prepared as in comparative example 5.
2. Formulation of a composition comprising polyurethane and DMF
4.2 parts of polyurethane with an elastic modulus of 60, 1.8 parts of polyurethane with an elastic modulus of 240 and 6 parts of solvent DMF are prepared into a uniform composition in parts by weight.
3. The skin-abrasion process was the same as in comparative example 5, with a thickness of about 3.1mm, wherein the weight percent of the base fabric was about 63.6% and the weight percent of the polyurethane was about 36.4%.
The Shore C hardness of the polyurethane leather is measured to be about 74 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the time required for the brush made by the Chinese patent 201920821079.2 to be used is about 143 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.5 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 19 μm using a fully automatic laser measuring instrument.
Example 13
1. Preparation of base cloth
The base fabric is prepared from 80 weight percent of nylon fiber, 15 weight percent of polyester fiber and 5 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
4.2 parts of polyurethane with an elastic modulus of 60, 1.8 parts of polyurethane with an elastic modulus of 240 and 6 parts of solvent DMF are prepared into a uniform composition in parts by weight.
3. Preparation of the abrasive skin layer
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; and (3) putting the obtained product into an oven with the temperature of 150 ℃, heating for 15 minutes to remove water, and rolling to obtain the polyurethane grinding skin layer with the thickness of about 2.0mm.
4. Preparation of wet polyurethane coatings
The release paper enters the lower part of the precise coating knife, the distance between the precise coating knife and the release paper is controlled, and the release paper is provided with enough composition containing polyurethane and DMF, so that the release paper advances at a constant speed, and a layer of coating containing the composition containing polyurethane and DMF is formed on one side of the release paper; the polyurethane is solidified by entering a solidification tank, and a large amount of solvent DMF enters water in the solidification tank because the solvent DMF and water are mixed and dissolved in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 150 deg.C for 15 min to remove water; and removing the release paper, and rolling to obtain the wet polyurethane coating with the thickness of about 0.4mm.
5. A dry polyurethane coating was prepared having a thickness of about 0.7mm as in example 12.
6. Preparing a multi-layer skin-grinding layer with a wet polyurethane coating on one side and a dry polyurethane coating on the other side
And compounding one surface of the abrasive skin layer with the wet polyurethane coating and the other surface with the dry polyurethane coating into a whole by using a compounding machine to obtain a multi-layer abrasive skin with the wet polyurethane coating on one surface and the dry polyurethane coating on the other surface, wherein the thickness is about 3.1mm, the weight percentage of the base cloth is about 45.7%, and the weight percentage of the polyurethane is about 54.3%.
The Shore C hardness of the polyurethane leather is measured to be about 74.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the service time of the brush manufactured by the Chinese patent of 201920821079.2 is about 149 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 1.3 mu m by subtracting the lowest value from the highest value; usingThe glass removal after polishing for 30 minutes was measured by a fully automatic laser measuring instrument to be about 26 μm.
Comparative example 7
1. Preparation of base cloth
The base fabric is prepared from 70 weight percent of polyester fiber, 10 weight percent of nylon fiber and 20 weight percent of viscose fiber by adopting a needled non-woven fabric manufacturing process.
2. Formulation of a composition comprising polyurethane and DMF
The polyurethane composition comprises, by weight, 2 parts of polyurethane with an elastic modulus of 55, 2 parts of polyurethane with an elastic modulus of 95 and 8 parts of solvent DMF.
3. Preparation of the skin
Fully impregnating the base cloth with a composition containing polyurethane and DMF, and then entering a coagulation tank, wherein a large amount of solvent DMF enters water in the coagulation tank to coagulate the polyurethane as the solvent DMF and water are mixed in any proportion; feeding the mixture into a washing tank to wash off redundant solvent DMF; heating in an oven at 110deg.C for 20 min to remove water, and rolling to obtain polyurethane polished skin with thickness of about 3.1mm, wherein the weight percentage of the base cloth is about 72.5%, and the weight percentage of polyurethane is about 27.5%.
The Shore C hardness of the polyurethane leather is about 72.5 degrees by using a Shore C hardness measuring method (according with national standards GB/T531, GB/T2489 and GB 2411); the use time of the brush made by the Chinese patent 201920821079.2 is about 24 hours; detecting the flatness of the glass surface by using a full-automatic laser measuring instrument, and taking 0.25cm 2 Measuring the glass thickness of each point at 10 points in the polishing process, wherein the difference of the surface flatness of the polished glass is about 3.8 mu m by subtracting the lowest value from the highest value; the glass removal after polishing for 30 minutes was measured to be about 20 μm using a fully automatic laser measuring instrument.

Claims (24)

1. The multilayer leather for polishing optical glass is characterized by comprising a leather layer and at least one wet polyurethane coating, wherein the leather layer is prepared by impregnating a base fabric with a composition containing polyurethane and DMF, and removing DMF, and the base fabric contains the following components in percentage by weight: 65-75% of nylon fibers, 15-25% of polyester fibers and 5-15% of viscose fibers; the composition containing polyurethane and DMF comprises the following components in percentage by weight: 8-25% of polyurethane with the elastic modulus of 50-60, 8-25% of polyurethane with the elastic modulus of 80-100 and 50-80% of DMF; alternatively, the polyurethane and DMF containing composition comprises, in weight percent: 15-35% of polyurethane with the elastic modulus of 55-65, 3-15% of polyurethane with the elastic modulus of 230-250 and 50-80% of DMF.
2. The multi-layer skin for polishing an optical glass according to claim 1, wherein the base cloth comprises the following components in percentage by weight: 65-75% of nylon fibers, 15-25% of polyester fibers and 5-15% of viscose fibers; the composition containing polyurethane and DMF comprises the following components in percentage by weight: 8-25% of polyurethane with the elastic modulus of 50-60, 8-25% of polyurethane with the elastic modulus of 80-100 and 50-80% of DMF; alternatively, the composition comprising polyurethane and DMF comprises, by weight: 15-35% of polyurethane with the elastic modulus of 55-65, 3-15% of polyurethane with the elastic modulus of 230-250 and 50-80% of DMF.
3. The multi-layer skin for polishing an optical glass according to claim 1 or 2, wherein the multi-layer skin comprises a skin layer and a wet polyurethane coating layer on one side of the skin layer.
4. A multi-layer skin for optical glass polishing according to claim 3, wherein said multi-layer skin is composed of a skin layer and a wet polyurethane coating layer on one side of said skin layer.
5. The multi-layer skin for polishing an optical glass according to claim 1 or 2, wherein the multi-layer skin comprises a skin layer and a wet polyurethane coating layer on both sides of the skin layer.
6. The multiple layer skin for optical glass polishing according to claim 5, wherein said multiple layer skin is composed of a skin layer and wet polyurethane coating layers on both sides of said skin layer.
7. The multi-layer skin for polishing optical glass according to claim 1 or 2, wherein the optical glass is a glass for a cellular phone.
8. The double-layer skin for polishing optical glass according to claim 1 or 2, wherein the composition comprising polyurethane and DMF comprises, by weight, 15-20% of polyurethane having an elastic modulus of 50-60, 15-20% of polyurethane having an elastic modulus of 80-100, and 60-70% of DMF; alternatively, the composition containing polyurethane and DMF comprises, by weight, 20-30% of polyurethane with elastic modulus of 55-65, 5-10% of polyurethane with elastic modulus of 230-250, and 60-70% of DMF.
9. The multi-layer skin for polishing optical glass according to claim 8, wherein the composition containing polyurethane and DMF comprises, by weight, 15-20% of polyurethane having an elastic modulus of 55, 15-20% of polyurethane having an elastic modulus of 95, and 60-70% of DMF; alternatively, the composition containing polyurethane and DMF comprises, by weight, 20-30% of polyurethane with elastic modulus of 60, 5-10% of polyurethane with elastic modulus of 240 and 60-70% of DMF.
10. The multi-layer skin for optical glass polishing according to claim 1 or 2, wherein the wet polyurethane coating layer is prepared by introducing a coating layer formed by a composition containing polyurethane and DMF into a coagulation tank, and solidifying the polyurethane by reducing DMF therein by mutual dissolution of water and DMF in the coagulation tank; then the water enters a water washing tank, and DMF is removed through water washing; finally heating at 110-150 ℃ to remove water.
11. The multiple-layer skin for polishing optical glass according to claim 1 or 2, wherein the thickness of the multiple-layer skin is 0.5 to 6mm.
12. The multi-layer skin for polishing of optical glass according to claim 1 or 2, wherein the thickness of the skin layer is 0.3 to 5.9mm.
13. The multi-layer skin for optical glass polishing according to claim 12, wherein the thickness of the skin layer is 1.0 to 3.2mm.
14. The multi-layer skin for optical glass polishing according to claim 1 or 2, wherein the wet polyurethane coating has a thickness of 0.1 to 3mm.
15. The multiple layer skin for optical glass polishing according to claim 14, wherein the wet polyurethane coating has a thickness of 0.4 to 1.2mm.
16. The double-layer skin for polishing optical glass according to claim 1 or 2, wherein the weight percentage of the base cloth in the double-layer skin is 25-60% and the weight percentage of the polyurethane is 40-75%.
17. The method for producing a double-layered skin for optical glass polishing according to any one of claims 1 to 16, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Removing DMF to obtain a grinding skin layer;
(4) Compounding one surface of the grinding skin layer and the wet polyurethane coating into a whole by using a compounding machine to obtain a multi-layer grinding skin with the wet polyurethane coating on one surface; or compounding the two sides of the grinding skin layer with the wet polyurethane coating into a whole by using a compounding machine to obtain the double-layer grinding skin with the wet polyurethane coating on the two sides.
18. The method of claim 17, wherein in step (3), the substrate impregnated with the composition comprising polyurethane and DMF is fed into a coagulation tank, and DMF therein is reduced by mutual dissolution of water and DMF in the coagulation tank, so that the polyurethane is coagulated; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C to remove water.
19. The method for producing a double-layered skin for optical glass polishing as defined in claim 1, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Feeding a substrate impregnated with a composition containing polyurethane and DMF under a precision coater, controlling a distance between the precision coater and the substrate impregnated with the composition containing polyurethane and DMF, and allowing the substrate impregnated with the composition containing polyurethane and DMF to advance at a uniform speed so as to form a coating layer of the composition containing polyurethane and DMF on one side of the substrate impregnated with the composition containing polyurethane and DMF;
(4) Entering a solidification tank, and reducing DMF in the water and DMF in the solidification tank by mutual dissolution to solidify polyurethane; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C to remove water to obtain multi-layer skin with wet polyurethane coating on one side.
20. The method for producing a double-layered skin for optical glass polishing as defined in claim 1, comprising the steps of:
(1) Preparing a composition containing polyurethane and DMF;
(2) Impregnating a substrate with a composition comprising polyurethane and DMF;
(3) Feeding a substrate impregnated with a composition containing polyurethane and DMF under a precision coater, controlling a distance between the precision coater and the substrate impregnated with the composition containing polyurethane and DMF, and allowing the substrate impregnated with the composition containing polyurethane and DMF to advance at a uniform speed so as to form a coating layer of the composition containing polyurethane and DMF on one side of the substrate impregnated with the composition containing polyurethane and DMF;
(4) Entering a solidification tank, and reducing DMF in the water and DMF in the solidification tank by mutual dissolution to solidify polyurethane; introducing the wastewater into a water washing tank, and removing DMF through water washing; heating at 110-150deg.C to remove water to obtain a multi-layer skin with wet polyurethane coating on one side;
(5) And compounding the other side of the double-layer leather with the wet polyurethane coating on one side with the wet polyurethane coating into a whole by using a compounding machine to obtain the double-layer leather with the wet polyurethane coating on both sides.
21. Use of a multi-layer skin for optical glass polishing according to any one of claims 1 to 16 for the preparation of a brush for optical glass polishing.
22. A brush for polishing an optical glass, characterized by being produced by the multi-layer polishing sheet for polishing an optical glass as claimed in any one of claims 1 to 16.
23. An optical glass polishing machine, wherein the brush for optical glass polishing according to claim 22 is used.
24. An optical glass polishing method, wherein the brush for optical glass polishing according to claim 22 is used.
CN202110445843.2A 2021-04-25 2021-04-25 Multi-layer buffing for polishing optical glass and preparation method thereof Active CN115233467B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109505140A (en) * 2017-09-15 2019-03-22 东莞市艾法研磨科技有限公司 Polished leather processing technology based on cerium oxide application
CN112281504A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281506A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281505A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281507A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109505140A (en) * 2017-09-15 2019-03-22 东莞市艾法研磨科技有限公司 Polished leather processing technology based on cerium oxide application
CN112281504A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281506A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281505A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof
CN112281507A (en) * 2020-10-13 2021-01-29 蔡林娟 Multi-layer buffing for glass polishing and preparation and application thereof

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