CN108691211B - Knife-scraping coating cloth - Google Patents

Knife-scraping coating cloth Download PDF

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Publication number
CN108691211B
CN108691211B CN201810648683.XA CN201810648683A CN108691211B CN 108691211 B CN108691211 B CN 108691211B CN 201810648683 A CN201810648683 A CN 201810648683A CN 108691211 B CN108691211 B CN 108691211B
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parts
coating
slurry
cloth
vertical
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CN108691211A (en
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孙燕云
马才忠
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Ningbo Tiandun Waterproof Material Co ltd
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Ningbo Tiandun Waterproof Material 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
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C09D127/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • 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
    • D06N3/0009—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 knitted 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
    • D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
    • D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
    • 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
    • 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
    • D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
    • 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
    • D06N3/04—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 by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N3/06—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 by reactions only involving carbon-to-carbon unsaturated bonds with polyvinylchloride or its copolymerisation products
    • 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
    • D06N2209/06—Properties of the materials having thermal properties
    • D06N2209/067—Flame resistant, fire resistant
    • 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
    • D06N2209/14—Properties of the materials having chemical properties
    • D06N2209/146—Soilproof, soil repellent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The invention discloses a knife-blade coating cloth which sequentially comprises a base cloth layer, a bonding layer and a surface layer from inside to outside, wherein the bonding layer sequentially comprises a vertical coating, a secondary coating and a tertiary coating from inside to outside; the vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 5-10 parts of antimony trioxide, 25-35 parts of sodium metaaluminate, 3-6 parts of soybean oil, 2-3 parts of a stabilizer and 5-10 parts of a cross-linking agent. The invention also discloses a preparation method of the knife-coated layer cloth.

Description

Knife-scraping coating cloth
Technical Field
The invention relates to the technical field of spinning, in particular to knife-scraped coating cloth.
Background
The knife-blade coating cloth in the prior art adopts high-strength polyester filament as base cloth, and after multiple strict process flows, polyvinyl chloride liquid PVC slurry is coated and scraped on two sides of the base cloth, and then the liquid adhesive cement is plasticized by a drying process to be combined into a whole.
For the flame retardant property, the prior art is to coat slurry on the base fabric, the slurry contains chemical substances with flame retardant effect, but the chemical substances with flame retardant effect have single component and poor flame retardant effect. For the antifouling and self-cleaning functions, the currently generally adopted technology is to change the surface performance of fibers, improve the surface tension of the fabric, make oil stains and other stains difficult to permeate into the fabric, and wipe with wet cloth to remove slight stains. And the process of coating and scraping on the surface of the base fabric is simple, only one layer is coated, so that the air tightness of the coated fabric obtained by coating and scraping the coating with a knife is poor, and the flame retardant property and the self-cleaning property are reduced.
The national intellectual property office website discloses a knife-blade coating tarpaulin which sequentially comprises a base cloth layer, a bonding layer, a shading layer and a surface layer from inside to outside, wherein the bonding layer consists of polyvinyl chloride pasty resin, a plasticizer, a stabilizer, an inorganic flame retardant and a mildew preventive; the surface layer consists of polyvinyl chloride with a K value of 85, a plasticizer, acrylic ester, an inorganic flame retardant and toluene. The knife-blade coating layer covering or awning on a car, boat, etc. cloth has certain effectWaterproof, antifouling, flame retardant and aging resistant performances, but the bonding layer adopts Al (OH)3Or Mg (OH)2The inorganic flame retardant is easy to fall off, so that the flame retardant effect is negatively influenced; only one layer of the adhesive layer is needed, so once the surface layer is damaged by flame combustion, the flame can be easily combusted continuously until the adhesive layer is formed; and the tarpaulin has a poor self-cleaning function compared with a smooth high-gloss surface.
The website of the national intellectual property office also discloses a method for preparing the sun-shading cloth coated with the PVC paste, which comprises the following steps: 1) preheating and ironing the polyester fiber mesh cloth and adjusting the skewness of the weft; 2) feeding the polyester fiber mesh cloth subjected to the skew filling adjustment into a vertical coating head, coating two sides of the mesh cloth by using a PVC paste through a scraper, and then performing preplasticizing; 3) coating the bottom surface of the preplasticized polyester fiber mesh cloth through a first horizontal coating head, preplasticizing gel, and cooling and shaping; 4) coating a surface layer on the polyester fiber mesh cloth coated on the bottom surface through a second horizontal coating head, and then plasticizing; 5) and carrying out surface treatment on the plasticized polyester fiber mesh cloth. The flame retardant grade of the sun-shading cloth prepared by the method is B1, and the flame retardant effect is poor; flame retardant and filler in raw materials of the used PVC paste lack detailed specific component research, and the vertical coating, the first horizontal coating and the second horizontal coating all adopt PVC pastes with the same formula, and after plasticization, three layers are not different and are equivalent to one layer. Because the three layers have the same components, once the surface layer is damaged by flame combustion, the PVC coating closest to the mesh cloth can be easily combusted continuously; and after surface treatment, the embossing forms a matte surface, and the self-cleaning function is not as good as that of a smooth highlight surface.
Therefore, the flame retardant effect and the self-cleaning performance of the knife-coated cloth in the prior art need to be improved.
Disclosure of Invention
The invention aims to solve the technical problem that the defects of the prior art are overcome: provides a knife-blade coating cloth with good flame-retardant effect and strong self-cleaning performance.
The technical solution of the invention is as follows: a knife-knife coating cloth comprises a base cloth layer, a bonding layer and a surface layer from inside to outside in sequence, wherein the bonding layer comprises a vertical coating, a second coating and a third coating from inside to outside in sequence; the vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 5-10 parts of antimony trioxide, 25-35 parts of sodium metaaluminate, 3-6 parts of soybean oil, 2-3 parts of a stabilizer and 5-10 parts of a cross-linking agent.
Compared with the prior art, the knife-coated layer cloth has the following remarkable advantages and beneficial effects:
polyvinyl chloride resin (PVC) is used as a main body plasticizer, and dioctyl phthalate (DOP) is used as a plasticizer, so that the PVC resin is fully plasticized, the DOP has a plasticizing effect, the coating structure is compact, gas permeation is prevented, the air tightness of the prepared product coating is improved, and the product has a strong self-cleaning function. Trichlorophenol (TCP) and antimony trioxide are both flame retardants, wherein TCP is an organic flame retardant and has good affinity with PVC; antimony trioxide is an inorganic flame retardant, but the flame retardant effect is poor, and the combination of TCP and antimony trioxide has a good synergistic effect, so that the flame retardant effect is obviously improved.
The base cloth layer, the DOP and the soybean oil are flammable, the DOP must be added in order to dissolve and mix uniformly with the main material PVC and enhance the plasticizing effect, the sizing agent containing the PVC and the DOP is flammable when being coated on the base cloth in the prior art, but a great amount of experimental researches are carried out, the adopted technical scheme avoids the defects, the three flame retardants in the sizing agent of the vertical coating play a synergistic effect, are uniformly mixed into the PVC and the DOP and are stably crosslinked on the surface of the base cloth, so that the PVC and the DOP cannot be combusted, the surface is airtight and smooth, the combustion of the knife-scraped cloth can be prevented, and the flame retardant grade of the knife-scraped cloth reaches M2. The soybean oil is flammable, but has weldability, a small amount of soybean oil is added to the vertical coating, so that the product can be welded and combined with each other, the length of the cloth is prolonged, the performance of the welded cloth still keeps excellent, the processing and the packaging are convenient, and meanwhile, because the soybean oil and the PVC resin have good compatibility, the plasticizing efficiency can be increased. The sodium metaaluminate has the function of a filling agent, improves the air tightness of the coating, has a flame retardant effect, can become compact aluminum hydroxide when meeting water and air, further enhances the air tightness of the coating, prevents combustion, can not fall off from the compact aluminum hydroxide formed by the reaction of the sodium metaaluminate, and keeps the flame retardant effect for a long time. The surface layer is added on the outer side of the bonding layer, so that the highlight effect is achieved, the surface is smooth, the cloth is easy to pull out, and the product has a self-cleaning function. Therefore, the knife-coated layer cloth has good flame retardant effect and strong self-cleaning performance.
Meanwhile, the bonding layer is sequentially provided with a vertical coating, a second coating and a third coating from inside to outside, the slurry formulas of the coatings are different, each coating has a fire retardant effect, the vertical coating enhances the weldability, the second coating enhances the fire retardant property, the third coating enhances the plasticizing effect, the three layers are tightly bonded, and the fire retardant effect is exerted on the whole; however, if one layer is burnt and damaged, other layers are not interfered, and the flame retardant function of the flame retardant coating can still be independently exerted. Even if high temperature is transferred to the third coating and the third coating is damaged during combustion, the second coating and the vertical coating still can play a good flame-retardant role; even if high temperature is transferred to the second coating and the second coating is damaged during combustion, the vertical coating still can play a good flame retardant role, and the flame retardant level reaches M2 on the whole. Of course, if the surface layer or the tricoat layer is not damaged by high temperature combustion, it is the whole of the adhesive layer that exerts flame retardant action.
Preferably, the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 25-35 parts of sodium metaaluminate and 2-3 parts of stabilizer. The zinc borate, the trichlorophenol, the antimony trioxide and the zinc borate are added into the secondary coating and matched, so that the flame retardant effect is good, the three flame retardants in the slurry of the secondary coating exert a synergistic effect, are uniformly blended into PVC and DOP, are stably adhered to the surface of the secondary coating, and have airtight and smooth surfaces, and the flame retardant effect of the knife-scraped cloth is further enhanced.
Preferably, the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 15-25 parts of sodium metaaluminate and 2-3 parts of stabilizer. The trichlorophenol, the antimony trioxide and the zinc borate all have good flame retardant effect, three flame retardants in the slurry of the formula of the three coatings play a synergistic effect, are uniformly blended into PVC and DOP, are stably adhered to the surfaces of the two coatings, and have airtight and smooth surfaces, so that the burning of the cloth scraped by a knife is further prevented. Compared with the second coating, the content of sodium metaaluminate in the third coating is reduced, and a large number of experimental researches find that the slurry with the formula can be firmly adhered to the second coating after being plasticized to form the third coating, so that the subsequent surface treatment is facilitated.
Preferably, the surface layer is prepared from the following components in parts by weight: 100 parts of treating agent, 15-25 parts of butanone and 25-35 parts of toluene; the treating agent is modified acrylic paint, namely an acrylic surface treating agent. The formula is adopted for surface treatment, so that the highlight effect is achieved, the surface of the knife scraping cloth is smooth, the self-cleaning function is achieved, and the self-cleaning performance grade reaches 5 grade.
Another preferred surface layer is prepared from the following components in parts by weight: 40-60 parts of treating agent, 40-60 parts of silica sol and 15-25 parts of aloe gel. The treating agent is modified acrylic paint, namely an acrylic surface treating agent. Tests show that the surface treatment by using the silica sol and adding the aloe gel achieves the highlight effect, so that the surface of the knife scraping cloth is smooth, the obtained knife scraping coated cloth has the self-cleaning function, and the self-cleaning performance grade reaches 5.
Preferably, the cross-linking agent is a small molecular compound with a molecular weight of 200-600, and the molecule usually contains a bifunctional group or contains one or more unsaturated bonds. Specifically, the cross-linking agent is one of epichlorohydrin, glutaraldehyde and N, N-methylene bisacrylamide.
Preferably, the stabilizer is a barium and zinc composite stabilizer or a methyl tin mercaptide heat stabilizer.
Preferably, the base fabric layer is a biaxial warp-knitted base fabric. The biaxial warp-knitted base fabric is also named as warp-knitted biaxial base fabric, and the base fabric is low in cost and simple to prepare.
Preferably, the mass of the surface layer accounts for 0.01-0.03% of the total mass of the knife scraping cloth. Although the quality of the surface layer is very little compared with the total quality, the surface layer plays a remarkable role, the surface layer realizes the highlight of the surface of the knife scraping cloth, and the highlight is beautiful on one hand, and on the other hand, the product is ensured to have a self-cleaning function.
Another technical problem to be solved by the present invention is to overcome the above disadvantages of the prior art: provides a preparation method for preparing knife-blade coated cloth with good flame-retardant effect and strong self-cleaning performance.
The technical solution of the above technical problem is as follows: a preparation method of knife-scraped coating cloth comprises the following steps:
1) preparing materials: weighing the components in proportion, and preparing slurry of the vertical coating, the second coating and the third coating;
2) vertical coating: unwinding the biaxial warp-knitted base cloth, heating the slurry of the vertical coating to 150-170 ℃, simultaneously sizing scrapers on two sides of the biaxial warp-knitted base cloth, cooling to enable the front side and the back side of the base cloth to be bonded with the vertical coating, and preserving heat at 160-180 ℃; the vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 5-10 parts of antimony trioxide, 25-35 parts of sodium metaaluminate, 3-6 parts of soybean oil, 2-3 parts of a stabilizer and 5-10 parts of a cross-linking agent;
3) coating for the second time: heating the slurry of the second coating to 170-180 ℃, applying a slurry scraper on the back surface, cooling to bond the second coating on the surface of the vertical coating on the back surface of the base cloth, and preserving heat at 180-190 ℃; the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 25-35 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
4) and (3) coating for three times: heating the slurry of the three coatings to 150-160 ℃, sizing a scraper on the front surface, cooling to bond the three coatings on the surface of the vertical coating on the front surface of the base cloth, and preserving heat at 160-170 ℃; the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 15-25 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
5) surface treatment: preparing surface slurry, and coating the surface slurry on the front surface to obtain the coating.
Compared with the prior art, the preparation method of the knife-coated fabric has the following remarkable advantages and beneficial effects:
the product adopts double-warp double-weft high-strength polyester filament machine cloth, the product is formed after four-coating and three-baking, the vertical coating comprises a front surface sizing scraper and a back surface sizing scraper, the two coatings are on the back surface sizing scraper, the three coatings are on the front surface sizing scraper, and the surface of the cloth is guaranteed to be uniformly coated with the scraping slurry all the time in the moving process of the cloth. The three layers of slurry are different, and have flame retardant function, and are also respectively emphasized, the vertical coating layer enhances the weldability, the second coating layer enhances the flame retardant property, the third coating layer enhances the plasticizing effect, the three layers are tightly bonded, and the flame retardant function is played on the whole; however, if one layer is burnt and damaged, other layers are not interfered, and the flame retardant function of the flame retardant coating can still be independently exerted. The preparation method has the advantages of delicate process, specific temperature process parameters in each step, continuous flow and convenient operation, and the prepared product has excellent flame retardant effect and self-cleaning property, and has breaking strength, tearing elongation and tearing strength which are greatly superior to those of the traditional knife-scraping cloth, and wide application range. The total process flow is 200m, the vertical coating is heated to 150-170 ℃, the temperature is kept at 160-180 ℃ after cooling, and the plasticization reaches 70% after vertical coating, namely the vertical coating is finished after the non-stick material is adhered; heating the second coating to 170-180 ℃, cooling, then preserving heat at 180-190 ℃, and plasticizing to 90% after the second coating; the third coating is the most critical one, the third coating is heated to 150-160 ℃, the temperature is kept at 160-170 ℃ after cooling, complete plasticization is achieved, the surface layer treatment has the effect of drawing eyes, the slurry formula of each layer is different, the weight is heavier, the processes and the formulas are matched with each other, and the prepared knife coating cloth has good flame retardant effect and strong self-cleaning performance.
Preferably, the preparation method of the slurry in the step 1) comprises the steps of weighing the liquid components, stirring at the speed of 800-1200 r/min, pouring the solid components, adding the color paste, vacuumizing, and filtering to remove powder below 80 meshes. The slurry prepared by the method has the advantages that solid and liquid are uniformly mixed, no bubbles or solid particles exist in the slurry, and the slurry is uniformly, flatly and smoothly distributed.
Preferably, the step 2) unwinding refers to reeling out the packaged cloth.
Specifically, the liquid component comprises dioctyl phthalate, trichlorophenol and soybean oil; the solid components are polyvinyl chloride resin, antimony trioxide, zinc borate and sodium metaaluminate.
Preferably, the mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4 to (3.4-3.8) to (4.4-4.8). The three coatings adopt the proportion, and the product has the best flame-retardant and self-cleaning effects.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples.
The invention relates to a plurality of raw materials, including polyvinyl chloride, dioctyl phthalate, trichlorophenol, antimony trioxide, zinc borate, sodium metaaluminate, soybean oil, cross-linking agent, stabilizing agent, treating agent, silica sol and aloe gel, wherein the raw materials are industrial raw materials and can be purchased and obtained from markets. Wherein the treating agent is an acrylic surface treating agent, namely a modified acrylic coating, purchased from sital fine coating (Suzhou) Co. The crosslinking agent is epichlorohydrin, glutaraldehyde or N, N-methylenebisacrylamide available from Yuen chemical Co.Ltd, Shanghai. The stabilizer is a barium and zinc composite stabilizer or a methyl tin mercaptide heat stabilizer.
In the invention, a plurality of parameters such as parts by weight and temperature are marked after the unit (such as parts by weight and DEG C) is uniformly limited at the upper limit, such as 45-55 parts by weight and 150-170 ℃. Of course, the units marked after the upper limit value and the lower limit value can also be adopted, such as 45 to 55 parts and 150 to 170 ℃. The two parameter ranges can be expressed in any way, in the embodiment, values are taken from the upper limit value, the lower limit value and the middle value of the parameter, and the numerical values are all in units.
The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.
Product example 1
A knife-blade coating cloth sequentially comprises a base cloth layer, a bonding layer and a surface layer from inside to outside, wherein the bonding layer sequentially comprises a vertical coating, a second coating and a third coating from inside to outside.
The vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 52 parts of dioctyl phthalate, 10 parts of trichlorophenol, 8 parts of antimony trioxide, 30 parts of sodium metaaluminate, 4 parts of soybean oil, 2.5 parts of barium-zinc composite stabilizer and 2.8 parts of epoxy chloropropane;
the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 52 parts of dioctyl phthalate, 10 parts of trichlorophenol, 14 parts of antimony trioxide, 8 parts of zinc borate, 30 parts of sodium metaaluminate and 2.5 parts of barium-zinc composite stabilizer;
the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 50 parts of dioctyl phthalate, 10 parts of trichlorophenol, 14 parts of antimony trioxide, 8 parts of zinc borate, 20 parts of sodium metaaluminate and 2.5 parts of barium-zinc composite stabilizer;
the surface layer is prepared from the following components in parts by weight: 100 parts of modified acrylic acid, 20 parts of butanone and 30 parts of toluene.
The mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.6: 4.6. 100 parts of polyvinyl chloride resin in both the top coat and the bottom coat are composed of 60 parts of PVC purchased from Shenyang chemical plant and 40 parts of PVC purchased from Jiangsu chemical plant. The polyvinyl chloride resin 100 parts in the three-layer coating was composed of 80 parts of PVC purchased from Shenyang chemical plant and 20 parts of PVC purchased from Jiangsu chemical plant.
The mass of the surface layer accounts for 0.01 percent of the total mass of the knife scraping cloth.
Soybean oil is in the vertical coating, if the required cloth is longer, the length of one cloth cannot be reached, and the 2 cloth can be welded at the moment. The specific welding method comprises the following steps: heating the upper and lower surfaces of the two pieces of cloth at 550 deg.C by iron plates at a speed of 7m/min, and cooling.
Product example 2
A knife-blade coating cloth sequentially comprises a base cloth layer, a bonding layer and a surface layer from inside to outside, wherein the bonding layer sequentially comprises a vertical coating, a second coating and a third coating from inside to outside.
The vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 5 parts of antimony trioxide, 25 parts of sodium metaaluminate, 3 parts of soybean oil, 2 parts of barium-zinc composite stabilizer and 5 parts of glutaraldehyde;
the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 10 parts of antimony trioxide, 5 parts of zinc borate, 25 parts of sodium metaaluminate and 2 parts of barium-zinc composite stabilizer;
the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 10 parts of antimony trioxide, 5 parts of zinc borate, 15 parts of sodium metaaluminate and 2 parts of barium-zinc composite stabilizer;
the surface layer is prepared from the following components in parts by weight: 100 parts of modified acrylic acid, 15 parts of butanone and 25 parts of toluene.
The mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.4: 4.4.
The mass of the surface layer accounts for 0.01 percent of the total mass of the knife scraping cloth.
Product example 3
A knife-blade coating cloth sequentially comprises a base cloth layer, a bonding layer and a surface layer from inside to outside, wherein the bonding layer sequentially comprises a vertical coating, a second coating and a third coating from inside to outside.
The vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 35 parts of sodium metaaluminate, 6 parts of soybean oil, 3 parts of tin methyl mercaptide heat stabilizer and 10 parts of N, N-methylene bisacrylamide;
the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 10 parts of zinc borate, 35 parts of sodium metaaluminate and 3 parts of methyl tin mercaptide heat stabilizer;
the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 10 parts of zinc borate, 25 parts of sodium metaaluminate and 3 parts of methyl tin mercaptide heat stabilizer;
the surface layer is prepared from the following components in parts by weight: 100 parts of modified acrylic acid, 25 parts of butanone and 35 parts of toluene.
The mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.8: 4.8.
The mass of the surface layer accounts for 0.03 percent of the total mass of the knife scraping cloth.
Product example 4
A knife-knife coating cloth is different from the third product embodiment in that a surface layer is prepared from the following components in parts by weight: 40 parts of modified acrylic acid, 60 parts of silica sol and 15 parts of aloe gel.
Preparation method example 1
A preparation method of knife-scraped coating cloth comprises the following steps:
1) preparing materials: weighing the components in proportion, and preparing slurry of the vertical coating, the second coating and the third coating; the preparation method of the slurry comprises the steps of weighing the liquid components, stirring at the speed of 800-1200 r/min, pouring the solid components, adding the color paste, vacuumizing, and filtering to remove powder below 80 meshes;
2) vertical coating: unwinding the biaxial warp-knitted base cloth, heating the slurry of the vertical coating to 150-170 ℃, simultaneously sizing scrapers on two sides of the biaxial warp-knitted base cloth, cooling to enable the front side and the back side of the base cloth to be bonded with the vertical coating, and preserving heat at 160-180 ℃;
3) coating for the second time: heating the slurry of the second coating to 170-180 ℃, applying a slurry scraper on the back surface, cooling to bond the second coating on the surface of the vertical coating on the back surface of the base cloth, and preserving heat at 180-190 ℃;
4) and (3) coating for three times: heating the slurry of the three coatings to 150-160 ℃, sizing a scraper on the front surface, cooling to bond the three coatings on the surface of the vertical coating on the front surface of the base cloth, and preserving heat at 160-170 ℃;
5) surface treatment: preparing surface slurry, and coating the surface slurry on the front surface to obtain the coating. The adhesive layer comprises a vertical coating, a second coating and a third coating from inside to outside.
In the step 1), the vertical coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 52 parts of dioctyl phthalate, 10 parts of trichlorophenol, 8 parts of antimony trioxide, 30 parts of sodium metaaluminate, 4 parts of soybean oil, 2.5 parts of barium-zinc composite stabilizer and 2.8 parts of epoxy chloropropane; the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 52 parts of dioctyl phthalate, 10 parts of trichlorophenol, 14 parts of antimony trioxide, 8 parts of zinc borate, 30 parts of sodium metaaluminate and 2.5 parts of barium-zinc composite stabilizer; the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 50 parts of dioctyl phthalate, 10 parts of trichlorophenol, 14 parts of antimony trioxide, 8 parts of zinc borate, 20 parts of sodium metaaluminate and 2.5 parts of barium-zinc composite stabilizer; the mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.6: 4.6.
In the step 5), the surface layer is prepared from the following components in parts by weight: 100 parts of modified acrylic acid, 20 parts of butanone and 30 parts of toluene. The mass of the surface layer accounts for 0.01-0.03% of the total mass of the knife scraping cloth.
Preparation method example 2
A preparation method of knife-scraped coating cloth comprises the following steps:
1) preparing materials: weighing the components in proportion, and preparing slurry of the vertical coating, the second coating and the third coating; the preparation method of the slurry comprises the steps of weighing the liquid components, stirring at the speed of 800-1200 r/min, pouring the solid components, adding the color paste, vacuumizing, and filtering to remove powder below 80 meshes;
2) vertical coating: unwinding the biaxial warp-knitted base cloth, heating the slurry of the vertical coating to 150-170 ℃, simultaneously sizing scrapers on two sides of the biaxial warp-knitted base cloth, cooling to enable the front side and the back side of the base cloth to be bonded with the vertical coating, and preserving heat at 160-180 ℃;
3) coating for the second time: heating the slurry of the second coating to 170-180 ℃, applying a slurry scraper on the back surface, cooling to bond the second coating on the surface of the vertical coating on the back surface of the base cloth, and preserving heat at 180-190 ℃;
4) and (3) coating for three times: heating the slurry of the three coatings to 150-160 ℃, sizing a scraper on the front surface, cooling to bond the three coatings on the surface of the vertical coating on the front surface of the base cloth, and preserving heat at 160-170 ℃;
5) surface treatment: preparing surface slurry, and coating the surface slurry on the front surface to obtain the coating. The adhesive layer comprises a vertical coating, a second coating and a third coating from inside to outside.
In the step 1), the vertical coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 5 parts of antimony trioxide, 25 parts of sodium metaaluminate, 3 parts of soybean oil, 2 parts of barium-zinc composite stabilizer and 5 parts of glutaraldehyde; the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 10 parts of antimony trioxide, 5 parts of zinc borate, 25 parts of sodium metaaluminate and 2 parts of barium-zinc composite stabilizer; the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45 parts of dioctyl phthalate, 5 parts of trichlorophenol, 10 parts of antimony trioxide, 5 parts of zinc borate, 15 parts of sodium metaaluminate and 2 parts of barium-zinc composite stabilizer; the mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.4: 4.4.
In the step 5), the surface layer is prepared from the following components in parts by weight: 100 parts of modified acrylic acid, 15 parts of butanone and 25 parts of toluene; the mass of the surface layer accounts for 0.01 percent of the total mass of the knife scraping cloth.
Preparation method example 3
A preparation method of knife-scraped coating cloth comprises the following steps:
1) preparing materials: weighing the components in proportion, and preparing slurry of the vertical coating, the second coating and the third coating; the preparation method of the slurry comprises the steps of weighing the liquid components, stirring at the speed of 800-1200 r/min, pouring the solid components, adding the color paste, vacuumizing, and filtering to remove powder below 80 meshes;
2) vertical coating: unwinding the biaxial warp-knitted base cloth, heating the slurry of the vertical coating to 150-170 ℃, simultaneously sizing scrapers on two sides of the biaxial warp-knitted base cloth, cooling to enable the front side and the back side of the base cloth to be bonded with the vertical coating, and preserving heat at 160-180 ℃;
3) coating for the second time: heating the slurry of the second coating to 170-180 ℃, applying a slurry scraper on the back surface, cooling to bond the second coating on the surface of the vertical coating on the back surface of the base cloth, and preserving heat at 180-190 ℃;
4) and (3) coating for three times: heating the slurry of the three coatings to 150-160 ℃, sizing a scraper on the front surface, cooling to bond the three coatings on the surface of the vertical coating on the front surface of the base cloth, and preserving heat at 160-170 ℃;
5) surface treatment: preparing surface slurry, and coating the surface slurry on the front surface to obtain the coating. The adhesive layer comprises a vertical coating, a second coating and a third coating from inside to outside.
In the step 1), the vertical coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 35 parts of sodium metaaluminate, 6 parts of soybean oil, 3 parts of tin methyl mercaptide heat stabilizer and 10 parts of N, N-methylene bisacrylamide; the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 10 parts of zinc borate, 35 parts of sodium metaaluminate and 3 parts of methyl tin mercaptide heat stabilizer; the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 55 parts of dioctyl phthalate, 15 parts of trichlorophenol, 20 parts of antimony trioxide, 10 parts of zinc borate, 25 parts of sodium metaaluminate and 3 parts of methyl tin mercaptide heat stabilizer; the mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.8: 4.8.
In the step 5), the surface layer is prepared from the following components in parts by weight: 40 parts of modified acrylic acid, 60 parts of silica sol and 15 parts of aloe gel; the mass of the surface layer accounts for 0.03 percent of the total mass of the knife scraping cloth.
Comparative example 1
The difference from the present invention is that the bond coat has only one layer of the standing coat and no two-coat and three-coat layers.
Comparative example 2
The difference from the present invention is that the adhesive layer has only a vertical coating layer and two coating layers, and does not have three coating layers.
Comparative example 3
The difference from the present invention is that the bond coat has only one layer of the same formulation as the three layers, and there is no standing coat or two layers.
Comparative example 4
The difference from the present invention is that the adhesive layer has only one layer; the formulation of the bond coat is different from the three-coat formulation of the present invention in that sodium metaaluminate is changed to aluminum hydroxide.
Comparative example 5
The difference from the present invention is that the slurry of the vertical coating, the secondary coating and the tertiary coating is free of antimony trioxide.
Comparative example 6
Unlike the present invention, the slurry of the vertical coating, the second coating and the third coating does not have TCP.
Comparative example 7
Unlike the present invention, the vertical coating is free of antimony trioxide.
Comparative example 8
The difference from the present invention is that there is no TCP in the vertical coating.
Comparative example 9
Unlike the present invention, the secondary coating is free of antimony trioxide.
Comparative example 10
The difference from the present invention is that there is no TCP in both coatings.
Comparative example 11
Unlike the present invention, the tri-coating is devoid of antimony trioxide.
Comparative example 12
The difference from the present invention is that there is no TCP in the three coatings.
Comparative example 13
Unlike the present invention, there is no skin layer.
Product testing
1. Thickness: 50-52S, namely 0.5-0.52 mm, namely the knife-knife coating cloth has reasonable thickness and convenient production.
2. Breaking strength: 2500N/5cm (ISO 13934-1-1999), which shows that the knife coating cloth of the invention has high strength and is not easy to break.
3. Peel strength: not less than 100N/5cm, which shows that the knife coating cloth of the invention has good adhesiveness and the coating is not easy to peel.
4. Shredding strength: radial: 280N, weft direction: 240N (according to ISO13937-2-2000), which shows that the knife coating cloth has high strength and is not easy to tear.
5. And (3) flame retardant test: the flame retardant property is that the after burning time, smoldering time and damage length are tested, and then the flame retardant grade is divided according to the test result. The shorter the after-flame time, smoldering time and damage length, the lower the damage degree, which means the better the flame retardant property of the knife scraping cloth; on the contrary, the flame retardant property of the knife scraping cloth is not good. Specifically, class B1 standard: the damage length is less than or equal to 15/cm, and the burning time is as follows: less than or equal to 5/s, smoldering time: is less than or equal to 5/s. The invention extinguishes within 5s of 500 open fire, and the flame retardant rating is M2. As can be seen from Table 1, the flame retardant time and the smoldering time of the comparative example are both significantly longer than those of the present invention, and the damage length of the comparative example is both significantly longer than that of the present invention, so that the flame retardant property of the present invention is good.
6. Self-cleaning performance: the rating was 5 by ATTCC anti-fouling test. The pencil is repeatedly and forcefully scratched on the same position of the surface of the product for 20 times, and then the product is cleaned after being wiped by wet cloth, so that the product has a self-cleaning function, and the service life of the product is prolonged to 10 years.
7. The heat insulation effect is as follows: 0.039 to 0.045W/(m.K)
Table 1: test for flame retardancy
Duration of continuous combustion/s Smoldering time/s Flame retardant rating Damaged length/cm
The invention 2.8 0 M2 11
Comparative example 1 5 5 B1 15
Comparative example 2 4.8 4.2 B1 15
Comparative example 3 4.1 3.7 B1 14.5
Comparative example 4 3.8 3.1 B1 14.1
Comparative example 5 4.9 4.3 B1 14.2
Comparative example 6 4.9 4.1 B1 14.0
Comparative example 7 3.3 2.6 B1 13.1
Comparative example 8 3.2 2.8 B1 12.9
Comparative example 9 3.6 2.9 B1 13.5
Comparative example 10 3.6 3.0 B1 13.6
Comparative example 11 4.1 3.3 B1 13.9
Comparative example 12 4.3 3.5 B1 14.0
Table 2: self-cleaning Performance test
adhesion/MPa Surface static contact angle Self-cleaning grade
Product example 3 6.8 120 degrees Grade 5
Product example 4 6.9 122 degree Grade 5
Comparative example 13 5.0 80 degree Grade 3
The above are merely characteristic embodiments of the present invention, and do not limit the scope of the present invention in any way. All technical solutions formed by equivalent exchanges or equivalent substitutions fall within the protection scope of the present invention.

Claims (1)

1. The knife-knife coating cloth is characterized by sequentially comprising a base cloth layer, a bonding layer and a surface layer from inside to outside, wherein the vertical coating is composed of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 5-10 parts of antimony trioxide, 25-35 parts of sodium metaaluminate, 3-6 parts of soybean oil, 2-3 parts of a stabilizer and 5-10 parts of a cross-linking agent;
the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 25-35 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 15-25 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
the mass ratio of the slurry of the vertical coating, the second coating and the third coating is 4: 3.4-3.8: 4.4-4.8;
the surface layer is prepared from the following components in parts by weight: 40-60 parts of treating agent, 40-60 parts of silica sol and 15-25 parts of aloe gel;
the mass of the surface layer accounts for 0.01-0.03% of the total mass of the knife scraping cloth;
the base cloth layer is biaxial warp-knitted base cloth;
the preparation method comprises the following steps:
1) preparing materials: weighing the components in proportion, and preparing slurry of the vertical coating, the second coating and the third coating;
2) vertical coating: unwinding the biaxial warp-knitted base cloth, heating the slurry of the vertical coating to 150-170 ℃, simultaneously sizing scrapers on two sides of the biaxial warp-knitted base cloth, cooling to enable the front side and the back side of the base cloth to be bonded with the vertical coating, and preserving heat at 160-180 ℃; the vertical coating comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 5-10 parts of antimony trioxide, 25-35 parts of sodium metaaluminate, 3-6 parts of soybean oil, 2-3 parts of a stabilizer and 5-10 parts of a cross-linking agent;
3) coating for the second time: heating the slurry of the second coating to 170-180 ℃, applying a slurry scraper on the back surface, cooling to bond the second coating on the surface of the vertical coating on the back surface of the base cloth, and preserving heat at 180-190 ℃; the second coating consists of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 25-35 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
4) and (3) coating for three times: heating the slurry of the three coatings to 150-160 ℃, sizing a scraper on the front surface, cooling to bond the three coatings on the surface of the vertical coating on the front surface of the base cloth, and preserving heat at 160-170 ℃; the three coatings consist of the following components in parts by weight: 100 parts of polyvinyl chloride resin, 45-55 parts of dioctyl phthalate, 5-15 parts of trichlorophenol, 10-20 parts of antimony trioxide, 5-10 parts of zinc borate, 15-25 parts of sodium metaaluminate and 2-3 parts of a stabilizer;
5) surface treatment: preparing surface slurry, and coating the surface slurry on the front surface to obtain the coating.
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