Manufacturing process and equipment of flame-retardant canvas

Abstract

The invention discloses a manufacturing process and equipment of flame-retardant canvas, and the manufacturing process comprises the following steps: step S1, selecting a base material which is a flame-retardant fabric, step S2, coating flame-retardant primer which is compounded by acrylic copolymer emulsion and octyl acrylic amine copolymer emulsion as a film-forming agent, and step S3, coating the flame-retardant primer on a flame-retardant fabric which is a flame-retardant fabric. The formula of the flame-retardant primer is as follows: magnesium hydroxide, benzene sarcosine resin, dipentaerythritol, a wetting agent, a defoaming agent, a waterborne polyurethane emulsion, an octyl acrylic acid amine copolymer emulsion, 40% titanium dioxide slurry, a whitening agent, water and a thickening agent; the formula of the flame-retardant coating comprises magnesium hydroxide, benzene sarcosinine resin, dipentaerythritol, a wetting agent, a defoaming agent, a pure acrylic emulsion, a polyurethane resin emulsion, 40% titanium dioxide slurry, a whitening agent, water and a thickening agent, and a knife coating machine is adopted as manufacturing equipment. The flame retardant canvas has the advantages of good flame retardant property, good environmental protection property, good surface polarity of the canvas and good affinity to oily pigments.

Description

Technical Field

[0001] The invention relates to the technical field of oil canvas, and in particular to a production process and equipment of flame-retardant oil canvas. Background Art

[0002] Canvas is a type of cloth used for painting oil paintings, which is coated with a primer that prevents the penetration of oil, solvents, water, etc. on a specific cloth substrate. The coated cloth used for indoor and outdoor advertising, light boxes, etc. after inkjet printing is called inkjet printing canvas. The strong texture of canvas allows your inkjet works to reach the highest artistic level. It is suitable for artistic wedding photos, personal art photos, photographic inkjet paintings with oil painting texture, reproduction oil painting, painters' works, simulation oil painting, etc., especially the preferred material for export inkjet paintings.

[0003] With the promotion of oil canvas, the requirements for its performance have been further improved. In order to meet the needs of the European and American markets, a number of oil canvases with so-called flame retardant effects have begun to appear on the market. However, they generally have the following problems: (1) flame retardant performance does not meet the standards; (2) the polarity of the canvas surface and its affinity for oil pigments are poor, making it difficult to color; (3) the oil canvas is not environmentally friendly. In response to the above problems, a solution is proposed below. Summary of the invention

[0004] The purpose of the present invention is to provide a process for producing a flame-retardant oil painting canvas and equipment thereof, which has the advantages of good flame retardancy, good environmental protection, good polarity of the canvas surface and good affinity for oil pigments.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A process for making a flame-retardant oil painting canvas comprises the following steps:

[0007] Step S1: selecting a substrate, wherein the substrate is a flame retardant fabric;

[0008] Step S2: applying a flame retardant primer, wherein the flame retardant primer is prepared by compounding acrylic copolymer emulsion and octyl acrylate copolymer emulsion as film-forming agents, and is matched with a composite intumescent flame retardant system, wherein the composite intumescent flame retardant system uses diammonium phosphate as a dehydrating agent, trimethylolpropane as a carbonizing agent, and sodium bicarbonate as a foaming agent, and the formula dosage of the flame retardant primer is as follows by weight: magnesium hydroxide is 25-35 parts, phenyl amine resin is 5-10 parts, dipentaerythritol is 15-20 parts, wetting agent is 0.5-1 part, defoaming agent is 0.5-1 part, water-based polyurethane emulsion is 15-25 parts, octyl acrylate copolymer emulsion is 30-40 parts, 40% titanium dioxide slurry is 10-20 parts, brightener is 0.5-1 part, water is 80-100 parts, and thickener is 3-6 parts;

[0009] Step S3: applying a flame retardant coating, wherein the formula and dosage of the flame retardant coating are as follows by weight: 10-25 parts of magnesium hydroxide, 10-15 parts of phenylamino resin, 10-15 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 1-3 parts of defoaming agent, 60-80 parts of pure acrylic emulsion, 10-20 parts of polyurethane resin emulsion, 5-8 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-120 parts of water, and 5-10 parts of thickener.

[0010] Preferably, in step S1, the flame retardant fabric includes the same number of polyester warp yarns and seaweed fiber weft yarns, and is formed by interweaving a plurality of polyester warp yarns and seaweed fiber weft yarns.

[0011] Preferably, in step S1, the flame retardant fabric has a satin weave structure.

[0012] Preferably, in step S2, the method for making a flame retardant primer is as follows: adding a wetting agent and a defoaming agent to water, and putting the mixture into a mixer, then starting the mixer, and then slowly adding magnesium hydroxide, phenylamino resin and dipentaerythritol in batches, increasing the stirring speed, and stirring at high speed for 30 minutes until the flame retardant powder is completely dispersed in the water. The obtained dispersion is stirred at medium speed, and a certain proportion of aqueous polyurethane emulsion and octyl acrylate copolymer emulsion are fully mixed, and then pre-ground titanium dioxide slurry and brightener are added, stirred at medium speed at room temperature for 8 minutes, mixed with the flame retardant powder dispersion prepared above, and continued stirring for more than half an hour. Finally, the viscosity is adjusted. The thickener must be dissolved in water first and then slowly added. As the viscosity increases, the stirring speed is increased. Finally, the wetting agent and defoaming agent are added. After fully stirring for 30 minutes, the mixture is filtered through a 200-mesh filter to obtain a flame retardant primer.

[0013] Preferably, in step S3, the method for preparing the flame retardant coating is as follows: adding a wetting agent and a defoaming agent to water, and putting them into a mixer, then turning on the mixer, and then slowly adding magnesium hydroxide, phenylamino resin and dipentaerythritol in batches, increasing the stirring speed, and stirring at high speed for 35 minutes until the flame retardant powder is completely dispersed in the water. The obtained dispersion is stirred, and a certain proportion of pure acrylic emulsion, pre-ground titanium dioxide slurry and brightener are fully mixed, stirred at medium speed at room temperature for 15 minutes, mixed with the above-prepared flame retardant powder dispersion, and continued to stir for more than half an hour, and then a certain proportion of polyurethane resin emulsion and water mixed solution is prepared, and the viscosity is adjusted. The thickener must be dissolved in water first and then slowly added. As the viscosity increases, the stirring speed is increased. Finally, the wetting agent and defoaming agent are added and stirred for 30 minutes, and then filtered through a 200-mesh filter to obtain a flame retardant coating.

[0014] Preferably, in step S2 and step S3, the water used is deionized water.

[0015] A device for making a flame retardant oil painting canvas comprises a knife coating machine. A substrate is placed in an oven of the knife coating machine. At the same time, filtered flame retardant primer slurry and flame retardant coating slurry are respectively added into the knife coating machine. The prepared flame retardant primer slurry and flame retardant coating slurry are respectively and evenly coated on the surface of the substrate by the knife coating machine. After coating, the oven temperature needs to be controlled. The oven is a 6-zone oven. The 6-zone oven settings are 100°C, 110°C, 120°C, 120°C, 110°C, and 100°C respectively. The speed of the knife coating machine is controlled to be 10-12 m / min.

[0016] The beneficial effects of the present invention are: the oil canvas has good flame retardancy and has a highly efficient flame retardant effect; the polarity of the surface of the oil canvas and its affinity for oil pigments are good, and the coloring efficiency is high; meanwhile, the oil canvas is more environmentally friendly, making it convenient for users to use and view. DETAILED DESCRIPTION

[0017] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention.

[0018] Example 1

[0019] A process for producing a flame-retardant oil painting canvas and equipment thereof, comprising the following steps:

[0020] Step S1: Select a substrate, the substrate is a flame-retardant fabric, wherein the flame-retardant fabric includes the same number of polyester warp yarns and seaweed fiber weft yarns, and is interwoven by a plurality of polyester warp yarns and seaweed fiber weft yarns, and the flame-retardant fabric has a satin weave structure.

[0021] Step S2: applying a flame retardant primer, wherein the flame retardant primer is prepared by compounding acrylic copolymer emulsion and octyl acrylate copolymer emulsion as film-forming agents, and is matched with a composite expansion flame retardant system, wherein the composite expansion flame retardant system uses diammonium phosphate as a dehydrating agent, trimethylolpropane as a carbonizing agent, and sodium bicarbonate as a foaming agent, and the formula of the flame retardant primer is as follows by weight: 25-35 parts of magnesium hydroxide, 5-10 parts of phenyl amine resin, 15-20 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 15-25 parts of water-based polyurethane emulsion, 30-40 parts of octyl acrylate copolymer emulsion, 10-20 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-100 parts of water, and 3-6 parts of thickener.

[0022] Take 0.5 parts of wetting agent and 0.5 parts of defoaming agent, add them to deionized water, and put them into the mixer. Then turn on the mixer, and then slowly add 25 parts of magnesium hydroxide, 5 parts of phenylamine resin and 15 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 30 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred at medium speed, and 15 parts of aqueous polyurethane emulsion and 30 parts of octyl acrylate copolymer emulsion are fully mixed. Then, 10 parts of pre-ground titanium dioxide slurry and 0.5 parts of brightener are added, stirred at medium speed at room temperature for 8 minutes, mixed with the above-prepared flame retardant powder dispersion, and continued to stir for more than half an hour. Finally, adjust the viscosity, dissolve 3 parts of thickener in deionized water, and then slowly add it. As the viscosity increases, increase the stirring speed, and finally add 0.5 parts of wetting agent and 0.5 parts of defoaming agent. After fully stirring for 30 minutes, filter through a 200-mesh filter to obtain a flame retardant primer slurry.

[0023] Step S3: applying a flame retardant coating, the formula of the flame retardant coating is as follows by weight: 10-25 parts of magnesium hydroxide, 10-15 parts of phenylamino resin, 10-15 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 1-3 parts of defoaming agent, 60-80 parts of pure acrylic emulsion, 10-20 parts of polyurethane resin emulsion, 5-8 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-120 parts of water, and 5-10 parts of thickener.

[0024] Take 0.5 parts of wetting agent and 1 part of defoaming agent, add them to deionized water, and put them into the mixer, then turn on the mixer, and then slowly add 10 parts of magnesium hydroxide, 10 parts of phenyl amine resin and 10 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 35 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred, and 60 parts of pure acrylic emulsion, 5 parts of pre-ground titanium dioxide slurry and 0.5 parts of brightener are fully mixed. Stir at medium speed at room temperature for 15 minutes, mix the above-prepared flame retardant powder dispersion, continue stirring for more than half an hour, and then dissolve 10 parts of polyurethane resin emulsion in 80 parts of deionized water to prepare a mixed solution, then adjust the viscosity, dissolve 5 parts of thickener in deionized water first, and then slowly add it. As the viscosity increases, increase the stirring speed, and finally add 0.5 parts of wetting agent and 1 part of defoaming agent, stir thoroughly for 30 minutes, and filter through a 200-mesh filter to obtain a flame retardant coating slurry.

[0025] Flame-retardant oil painting canvas is made by a knife coating machine. The substrate is placed in the oven of the knife coating machine. At the same time, the filtered flame retardant primer slurry and flame retardant coating slurry are respectively added into the knife coating machine. The modulated flame retardant primer slurry and flame retardant coating slurry are respectively evenly coated on the surface of the substrate by the knife coating machine. After coating, the oven temperature needs to be controlled. The oven is a 6-zone oven. The settings of the 6-zone oven are 100℃, 110℃, 120℃, 120℃, 110℃, 100℃ respectively, and the speed of the knife coating machine is controlled at 10-12 m / min.

[0026] The flame-retardant oil canvas prepared by the above method has the following advantages: the oil canvas has good flame retardancy and has a highly efficient flame retardant effect; the polarity of the oil canvas surface and its affinity for oil pigments are good, and the coloring efficiency is high; at the same time, the oil canvas is more environmentally friendly, making it easier for users to use and view.

[0027] Example 2

[0028] A process for producing a flame-retardant oil painting canvas and equipment thereof, comprising the following steps:

[0029] Step S1: Select a substrate, the substrate is a flame-retardant fabric, wherein the flame-retardant fabric includes the same number of polyester warp yarns and seaweed fiber weft yarns, and is interwoven by a plurality of polyester warp yarns and seaweed fiber weft yarns, and the flame-retardant fabric has a satin weave structure.

[0030] Step S2: applying a flame retardant primer, wherein the flame retardant primer is prepared by compounding acrylic copolymer emulsion and octyl acrylate copolymer emulsion as film-forming agents, and is matched with a composite expansion flame retardant system, wherein the composite expansion flame retardant system uses diammonium phosphate as a dehydrating agent, trimethylolpropane as a carbonizing agent, and sodium bicarbonate as a foaming agent, and the formula of the flame retardant primer is as follows by weight: 25-35 parts of magnesium hydroxide, 5-10 parts of phenyl amine resin, 15-20 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 15-25 parts of water-based polyurethane emulsion, 30-40 parts of octyl acrylate copolymer emulsion, 10-20 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-100 parts of water, and 3-6 parts of thickener.

[0031] Take 0.8 parts of wetting agent and 0.8 parts of defoaming agent, add them to deionized water, and put them into the mixer. Then turn on the mixer, and then slowly add 30 parts of magnesium hydroxide, 8 parts of phenyl amine resin and 18 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 30 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred at medium speed, and 20 parts of aqueous polyurethane emulsion and 35 parts of octyl acrylate copolymer emulsion are fully mixed. Then, 15 parts of pre-ground titanium dioxide slurry and 0.8 parts of brightener are added, stirred at medium speed at room temperature for 8 minutes, mixed with the above-prepared flame retardant powder dispersion, and continued to stir for more than half an hour. Finally, adjust the viscosity, dissolve 4 parts of thickener in deionized water, and then slowly add it. As the viscosity increases, increase the stirring speed, and finally add 0.8 parts of wetting agent and 0.8 parts of defoaming agent. After fully stirring for 30 minutes, filter through a 200-mesh filter to obtain a flame retardant primer slurry.

[0032] Step S3: applying a flame retardant coating, the formula of the flame retardant coating is as follows by weight: 10-25 parts of magnesium hydroxide, 10-15 parts of phenylamino resin, 10-15 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 1-3 parts of defoaming agent, 60-80 parts of pure acrylic emulsion, 10-20 parts of polyurethane resin emulsion, 5-8 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-120 parts of water, and 5-10 parts of thickener.

[0033] Take 0.8 parts of wetting agent and 2 parts of defoaming agent, add them to deionized water, and put them into the mixer, then turn on the mixer, and then slowly add 18 parts of magnesium hydroxide, 13 parts of phenyl amine resin and 13 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 35 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred, and 70 parts of pure acrylic emulsion, 6 parts of pre-ground titanium dioxide slurry and 0.8 parts of brightener are fully mixed. Stir at medium speed at room temperature for 15 minutes, mix the above-prepared flame retardant powder dispersion, continue stirring for more than half an hour, and then dissolve 15 parts of polyurethane resin emulsion in 100 parts of deionized water to prepare a mixed solution, then adjust the viscosity, dissolve 8 parts of thickener in deionized water first, and then slowly add it. As the viscosity increases, increase the stirring speed, and finally add 0.8 parts of wetting agent and 2 parts of defoaming agent, stir fully for 30 minutes, and filter through a 200-mesh filter to obtain a flame retardant coating slurry.

[0034] Flame-retardant oil painting canvas is made by a knife coating machine. The substrate is placed in the oven of the knife coating machine. At the same time, the filtered flame retardant primer slurry and flame retardant coating slurry are respectively added into the knife coating machine. The modulated flame retardant primer slurry and flame retardant coating slurry are respectively evenly coated on the surface of the substrate by the knife coating machine. After coating, the oven temperature needs to be controlled. The oven is a 6-zone oven. The settings of the 6-zone oven are 100℃, 110℃, 120℃, 120℃, 110℃, 100℃ respectively, and the speed of the knife coating machine is controlled at 10-12 m / min.

[0035] The flame-retardant oil canvas prepared by the above method has the following advantages: the oil canvas has good flame retardancy and has a highly efficient flame retardant effect; the polarity of the oil canvas surface and its affinity for oil pigments are good, and the coloring efficiency is high; at the same time, the oil canvas is more environmentally friendly, making it easier for users to use and view.

[0036] Example 3

[0037] A process for producing a flame-retardant oil painting canvas and equipment thereof, comprising the following steps:

[0038] Step S1: Select a substrate, the substrate is a flame-retardant fabric, wherein the flame-retardant fabric includes the same number of polyester warp yarns and seaweed fiber weft yarns, and is interwoven by a plurality of polyester warp yarns and seaweed fiber weft yarns, and the flame-retardant fabric has a satin weave structure.

[0039] Step S2: applying a flame retardant primer, wherein the flame retardant primer is prepared by compounding acrylic copolymer emulsion and octyl acrylate copolymer emulsion as film-forming agents, and is matched with a composite expansion flame retardant system, wherein the composite expansion flame retardant system uses diammonium phosphate as a dehydrating agent, trimethylolpropane as a carbonizing agent, and sodium bicarbonate as a foaming agent, and the formula of the flame retardant primer is as follows by weight: 25-35 parts of magnesium hydroxide, 5-10 parts of phenyl amine resin, 15-20 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 0.5-1 parts of defoaming agent, 15-25 parts of water-based polyurethane emulsion, 30-40 parts of octyl acrylate copolymer emulsion, 10-20 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-100 parts of water, and 3-6 parts of thickener.

[0040] Take 1 part of wetting agent and 1 part of defoaming agent, add them to deionized water, and put them into the mixer, then turn on the mixer, and then slowly add 35 parts of magnesium hydroxide, 10 parts of phenyl amine resin and 20 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 30 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred at medium speed, and 25 parts of aqueous polyurethane emulsion and 40 parts of octyl acrylate copolymer emulsion are fully mixed. Then, 20 parts of pre-ground titanium dioxide slurry and 1 part of brightener are added, stirred at medium speed at room temperature for 8 minutes, mixed with the above-prepared flame retardant powder dispersion, and continued to stir for more than half an hour. Finally, adjust the viscosity, dissolve 6 parts of thickener in deionized water, and then slowly add it. As the viscosity increases, increase the stirring speed. Finally, add 1 part of wetting agent and 1 part of defoaming agent. After fully stirring for 30 minutes, filter through a 200-mesh filter to obtain a flame retardant primer slurry.

[0041] Step S3: applying a flame retardant coating, the formula of the flame retardant coating is as follows by weight: 10-25 parts of magnesium hydroxide, 10-15 parts of phenylamino resin, 10-15 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 1-3 parts of defoaming agent, 60-80 parts of pure acrylic emulsion, 10-20 parts of polyurethane resin emulsion, 5-8 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-120 parts of water, and 5-10 parts of thickener.

[0042] Take 1 part of wetting agent and 3 parts of defoaming agent, add them to deionized water, and put them into the mixer, then turn on the mixer, and then slowly add 25 parts of magnesium hydroxide, 15 parts of phenyl amine resin and 15 parts of dipentaerythritol in batches, increase the stirring speed, and stir at high speed for 35 minutes until the flame retardant powder is completely dispersed in the deionized water. The obtained dispersion is stirred, and 80 parts of pure acrylic emulsion, 8 parts of pre-ground titanium dioxide slurry and 1 part of brightener are fully mixed. Stir at medium speed at room temperature for 15 minutes, mix the above-prepared flame retardant powder dispersion, continue stirring for more than half an hour, and then dissolve 20 parts of polyurethane resin emulsion in 120 parts of deionized water to prepare a mixed solution, then adjust the viscosity, dissolve 10 parts of thickener in deionized water first, and then slowly add it. As the viscosity increases, increase the stirring speed, and finally add 1 part of wetting agent and 3 parts of defoaming agent, stir thoroughly for 30 minutes, and filter through a 200-mesh filter to obtain a flame retardant coating slurry.

[0043] Flame-retardant oil painting canvas is made by a knife coating machine. The substrate is placed in the oven of the knife coating machine. At the same time, the filtered flame retardant primer slurry and flame retardant coating slurry are respectively added into the knife coating machine. The modulated flame retardant primer slurry and flame retardant coating slurry are respectively evenly coated on the surface of the substrate by the knife coating machine. After coating, the oven temperature needs to be controlled. The oven is a 6-zone oven. The settings of the 6-zone oven are 100℃, 110℃, 120℃, 120℃, 110℃, 100℃ respectively, and the speed of the knife coating machine is controlled at 10-12 m / min.

[0044] The flame-retardant oil canvas prepared by the above method has the following advantages: the oil canvas has good flame retardancy and has a highly efficient flame retardant effect; the polarity of the oil canvas surface and its affinity for oil pigments are good, and the coloring efficiency is high; at the same time, the oil canvas is more environmentally friendly, making it easier for users to use and view.

[0045] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for producing flame-retardant oil painting canvas, characterized in that: The following steps are involved: Step S1: selecting a substrate, wherein the substrate is a flame retardant fabric; Step S2: applying a flame retardant primer, wherein the flame retardant primer is prepared by compounding acrylic copolymer emulsion and octyl acrylate copolymer emulsion as film-forming agents, and is matched with a composite intumescent flame retardant system, wherein the composite intumescent flame retardant system uses diammonium phosphate as a dehydrating agent, trimethylolpropane as a carbonizing agent, and sodium bicarbonate as a foaming agent, and the formula dosage of the flame retardant primer is as follows by weight: magnesium hydroxide is 25-35 parts, phenyl amine resin is 5-10 parts, dipentaerythritol is 15-20 parts, wetting agent is 0.5-1 part, defoaming agent is 0.5-1 part, water-based polyurethane emulsion is 15-25 parts, octyl acrylate copolymer emulsion is 30-40 parts, 40% titanium dioxide slurry is 10-20 parts, brightener is 0.5-1 part, water is 80-100 parts, and thickener is 3-6 parts; Step S3: applying a flame retardant coating, wherein the formula and dosage of the flame retardant coating are as follows by weight: 10-25 parts of magnesium hydroxide, 10-15 parts of phenylamino resin, 10-15 parts of dipentaerythritol, 0.5-1 parts of wetting agent, 1-3 parts of defoaming agent, 60-80 parts of pure acrylic emulsion, 10-20 parts of polyurethane resin emulsion, 5-8 parts of 40% titanium dioxide slurry, 0.5-1 parts of brightener, 80-120 parts of water, and 5-10 parts of thickener.

2. The process for making a flame-retardant oil painting canvas according to claim 1, characterized in that: In the step S1, the flame retardant fabric includes the same number of polyester warp yarns and seaweed fiber weft yarns, and is formed by interweaving a plurality of polyester warp yarns and seaweed fiber weft yarns.

3. The process for making a flame-retardant oil painting canvas according to claim 2, characterized in that: In step S1, the flame retardant fabric has a satin weave structure.

4. The process for making a flame-retardant oil painting canvas according to claim 3, characterized in that: In the step S2, the method for preparing the flame retardant primer is: adding a wetting agent and a defoaming agent to water, and putting them into a mixer, then turning on the mixer, and then slowly adding magnesium hydroxide, phenylamino resin and dipentaerythritol in batches, increasing the stirring speed, and stirring at high speed for 30 minutes until the flame retardant powder is completely dispersed in the water. The obtained dispersion is stirred at medium speed, and a certain proportion of aqueous polyurethane emulsion and octyl acrylate copolymer emulsion are fully mixed, and then pre-ground titanium dioxide slurry and brightener are added, stirred at medium speed at room temperature for 8 minutes, mixed with the flame retardant powder dispersion prepared above, and continued to stir for more than half an hour. Finally, the viscosity is adjusted. The thickener must be dissolved in water first and then slowly added. As the viscosity increases, the stirring speed is increased. Finally, the wetting agent and defoaming agent are added, and after fully stirring for 30 minutes, it is filtered through a 200-mesh filter to obtain a flame retardant primer.

5. The process for making a flame retardant oil painting canvas according to claim 4, characterized in that: In the step S3, the method for preparing the flame retardant coating is as follows: adding a wetting agent and a defoaming agent to water, and putting them into a mixer, then starting the mixer, and then slowly adding magnesium hydroxide, phenylamino resin and dipentaerythritol in batches, increasing the stirring speed, and stirring at high speed for 35 minutes until the flame retardant powder is completely dispersed in the water. The obtained dispersion is stirred, and a certain proportion of pure acrylic emulsion, pre-ground titanium dioxide slurry and brightener are fully mixed, stirred at medium speed at room temperature for 15 minutes, mixed with the above-prepared flame retardant powder dispersion, and continued to stir for more than half an hour, and then a certain proportion of polyurethane resin emulsion and water are mixed. The viscosity is adjusted, the thickener must be dissolved in water first, and then slowly added. As the viscosity increases, the stirring speed is increased, and finally the wetting agent and defoaming agent are added and stirred for 30 minutes, and then filtered through a 200-mesh filter to obtain a flame retardant coating.

6. The process for making a flame-retardant oil painting canvas according to claim 5, characterized in that: In the step S2 and step S3, the water used is deionized water.

7. The equipment for making flame-retardant oil painting canvas according to claim 6, characterized in that: The method comprises a knife coating machine, wherein the substrate is placed into an oven of the knife coating machine, and at the same time, the filtered flame retardant primer slurry and the flame retardant coating slurry are respectively added into the knife coating machine, and the prepared flame retardant primer slurry and the flame retardant coating slurry are respectively and evenly coated on the surface of the substrate by the knife coating machine. After coating, the oven temperature needs to be controlled, and the oven is a 6-zone oven, and the 6-zone oven settings are 100°C, 110°C, 120°C, 120°C, 110°C, and 100°C respectively, and the speed of the knife coating machine is controlled to be 10-12 m / min.