Flame-retardant wall cloth and preparation method thereof

Abstract

The invention relates to the technical field of decorative materials, in particular to flame-retardant wall cloth and a preparation method thereof. The flame-retardant wall cloth provided by the invention comprises a base cloth layer, a flame-retardant coating and a surface layer, the flame-retardant coating is formed by water-based paint coated on the base cloth layer; the surface layer is formed by a surface layer coating which is coated on the flame-retardant coating; the water-based paint comprises a water-based adhesive and an inorganic pigment filler, and the mass ratio of the water-based adhesive to the inorganic pigment filler is 1: (2-4); the inorganic pigment filler comprises an inorganic filler and titanium dioxide, the particle sizes of the inorganic filler comprise 1000 meshes and 800 meshes, and the mass ratio of the 1000-mesh inorganic filler to the 800-mesh inorganic filler is (1-2): (1-2). According to the flame-retardant wall cloth, chemical flame retardants do not need to be added, and the flame-retardant wall cloth is more environmentally friendly and safer; the flame-retardant property is more stable and cannot be reduced along with time extension; the cost of the flame retardant does not need to be additionally increased, the preparation is simple, and good economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of decorative materials, in particular to a flame retardant wall cloth and a preparation method thereof. Background Art

[0002] As people's living standards improve, they are increasingly demanding the environmental protection and flame retardant properties of decorative materials. For wall coverings used to decorate walls, flame retardancy is an inevitable trend. Flame retardant wall coverings currently on the market are generally prepared by adding flame retardants to the substrate and coating and using chemical flame retardant methods. This type of flame retardant wall covering has the following problems: (1) Due to the addition of flame retardants, even if the flame retardant used is an environmentally friendly flame retardant, a large amount of black smoke and a certain amount of toxic and harmful gases will be generated during combustion; (2) Flame retardants generally have a certain time limit. After the time limit, the flame retardant effect will decrease or the wall covering will turn yellow, absorb moisture, and undergo other adverse changes; (3) The price of flame retardants is generally high, and the addition of flame retardants will also increase product costs. Therefore, it is of great significance to seek a flame retardant wall covering that is more environmentally friendly, not subject to time limits, and has a lower cost. Summary of the invention

[0003] In view of the shortcomings of the prior art mentioned above, the present invention adopts a physical flame retardant method to achieve a flame retardant effect by adjusting the coating formula and controlling the weight of the cloth base, the coating amount on the cloth base and the distribution on the cloth base. The flame retardant effect of the flame retardant wall cloth provided by the present invention will not change over time, will not produce black smoke and toxic and harmful gases, and will not increase additional costs.

[0004] To achieve the above-mentioned purpose and other related purposes, the present invention adopts the following technical solutions:

[0005] The first aspect of the present invention provides a flame-retardant wall cloth, comprising a base fabric layer, a flame-retardant coating and a surface layer; the flame-retardant coating is formed by a water-based paint coated on the base fabric layer; the surface layer is formed by a surface layer paint coated on the flame-retardant coating; the water-based paint comprises a water-based adhesive and an inorganic pigment filler, and the mass ratio of the water-based adhesive to the inorganic pigment filler is 1:2-4; the inorganic pigment filler comprises an inorganic filler and titanium dioxide, the mesh size of the inorganic filler particle size comprises 1000 mesh and 800 mesh, and the mass ratio of the 1000 mesh inorganic filler to the 800 mesh inorganic filler is 1-2:1-2.

[0006] The second aspect of the present invention provides a method for preparing the flame retardant wall cloth, comprising the following steps:

[0007] S1. Take a water-based adhesive and an inorganic pigment and filler according to a mass ratio, mix them evenly, and prepare a water-based coating;

[0008] S2, applying the water-based paint on the base fabric layer, and drying it to form a flame retardant coating;

[0009] S3, applying the surface coating on the flame retardant coating, and drying again to form a surface layer.

[0010] As described above, the flame retardant wall cloth and the preparation method thereof of the present invention have the following beneficial effects:

[0011] 1. The flame retardant wall cloth provided by the present invention does not need to add chemical flame retardants, is more environmentally friendly and safe, does not produce black smoke and toxic and harmful gases when burned, and only produces a small amount of white smoke; the flame retardant performance is more stable and will not decrease over time; compared with the current flame retardant effect achieved by adding flame retardants, which generally requires an additional 1 to 1.5 yuan / m 2 Compared with the cost of flame retardant, the present invention does not need to increase the cost of flame retardant and has good economic benefits.

[0012] 2. The flame-retardant wall cloth preparation method provided by the present invention can be prepared by coating and drying twice, is simple to operate, convenient to promote, and has good industrialization prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The figure is a schematic diagram of the cross-sectional structure of a flame-retardant wall cloth according to an embodiment of the present invention.

[0014] Reference numerals:

[0015] 1-base fabric layer; 2-flame retardant coating; 3-surface layer. DETAILED DESCRIPTION

[0016] The flame retardant wall cloth and the preparation method thereof of the present invention are described in detail below.

[0017] The inventor of the present invention starts from the principle of physical flame retardancy, achieves flame retardancy by adjusting the coating formula and controlling the weight of the cloth base, the coating amount on the cloth base and the distribution of the coating on the cloth base, and completes the present invention on this basis.

[0018] The first aspect of the present invention provides a flame retardant wall covering, such as Figure 1 As shown, it includes a base fabric layer 1, a flame retardant coating 2 and a surface layer 3; the flame retardant coating is formed by a water-based coating coated on the base fabric layer 1; the surface layer 3 is formed by a surface layer coating coated on the flame retardant coating 2; the water-based coating includes a water-based adhesive and an inorganic pigment filler, and the mass ratio of the water-based adhesive to the inorganic pigment filler is 1:2-4; the inorganic pigment filler includes an inorganic filler and titanium dioxide, and the mesh size of the inorganic filler particle size includes 1000 mesh and 800 mesh, and the mass ratio of the 1000 mesh inorganic filler to the 800 mesh inorganic filler is 1-2:1-2.

[0019] The water-based coating described in the present invention includes a water-based adhesive and an inorganic pigment filler, has good coverage on the base fabric layer 1, and the penetration depth of the water-based coating in the base fabric layer can be controlled by the coating ratio of the water-based coating on the base fabric layer 1. After drying, a coating with a certain pore size distribution formed by inorganic fillers of different particle sizes is obtained, thereby making the fabric base produce a flame retardant effect.

[0020] In some embodiments of the present invention, the mesh size of the inorganic filler particle size also includes 600 mesh and 300 mesh, and the mass ratio of 1000 mesh inorganic filler, 800 mesh inorganic filler, 600 mesh inorganic filler and 300 mesh inorganic filler is 1-2:1-2:1-2:1-2.

[0021] In some embodiments of the present invention, the base fabric layer has a grammage of 60 to 120 g / m 2 , can be 60~70g / m 2 , 70~80g / m 2 , 80~90g / m 2 , 90~100g / m 2 100~110g / m 2 , can also be 110 ~ 120g / m 2 The flame retardant coating has a gram weight of 90 to 200 g / m 2 , can be 90~100g / m 2 100~110g / m 2 110~120g / m 2 120~130g / m 2 130~140g / m 2 140~150g / m 2 150~160g / m 2 160~170g / m 2 170~180g / m 2 180~190g / m 2 , can also be 190 ~ 200g / m 2 .

[0022] In some embodiments of the present invention, the base fabric layer 1 is a non-woven fabric, preferably a spunlace non-woven fabric or a needle-punched non-woven fabric; preferably, the non-woven fabric is made of polyester fiber, which has high strength and good durability.

[0023] In some embodiments of the present invention, the water-based adhesive includes a polymer emulsion, which is obtained by mixing ethylene-vinyl acetate copolymer (EVA) emulsion, polyvinyl alcohol (PVA) emulsion and water-based acrylic emulsion in a mass ratio of 1 to 3:1 to 2:1 to 2; the solid content of the EVA emulsion is usually between 55% and 65%, and has good adhesive properties, aging resistance, light resistance and saponification resistance; the mass fraction of PVA in the PVA emulsion is usually 15% to 35%, and has good water resistance, adhesion and film-forming properties; the solid content of the water-based acrylic emulsion is usually between 40% and 60%, and has good water resistance, alkali resistance and stain resistance. The present invention makes the water-based adhesive not only have good adhesion and wettability, but also enable the water-based coating to be firmly combined with the base fabric layer and easy to form a film, and also make the formed flame-retardant coating have good water resistance, weather resistance and stain resistance. In some specific embodiments, the water-based adhesive may further include additives, such as one or more of a viscosity modifier, an emulsifier, an initiator, a cross-linking agent, a dispersant, a surfactant, and the like.

[0024] In some embodiments of the present invention, the inorganic pigments and fillers are obtained by mixing calcium carbonate, kaolin, talc and titanium dioxide in a mass ratio of 1 to 4:1 to 2:1 to 2:1. According to the mesh size of the inorganic filler, the inorganic filler includes 1000 mesh, 800 mesh, 600 mesh and 300 mesh, and the mass ratio of each mesh size is 1 to 2:1 to 2:1 to 2:1 to 2. In some specific embodiments of the present invention, the mesh size of calcium carbonate is 1000 mesh, 800 mesh, 600 mesh and 300 mesh; the mesh size of kaolin is 1000 mesh and 800 mesh; the mesh size of talc is 1000 mesh and 800 mesh. In some specific embodiments of the present invention, the titanium dioxide is ultrafine titanium dioxide.

[0025] In some embodiments of the present invention, the surface coating includes calcium carbonate, titanium dioxide, kaolin, adhesive and pigment. There is no special restriction on the mesh size of the calcium carbonate and kaolin, which can be selected according to the performance requirements of the surface layer, usually 325 to 1250 mesh; there is no special restriction on the adhesive, which can be a polymer emulsion, such as ethylene-vinyl acetate copolymer (EVA) emulsion, polyvinyl alcohol (PVA) emulsion and water-based acrylic emulsion. One or a combination of several; the pigment is a conventionally used inorganic pigment paste, which can be purchased on the market. The pigment requires a uniform particle size distribution, is easy to disperse in the system, and has good weather resistance. Preferably, the pigment is selected from any one or more combinations of bright red, medium yellow, carbon black, phthalocyanine green or phthalocyanine blue pigments.

[0026] In some embodiments of the present invention, the surface layer 3 is provided with an embossed pattern or a printed pattern.

[0027] The second aspect of the present invention provides a method for preparing the flame retardant wall cloth, comprising the following steps:

[0028] S1. Take a water-based adhesive and an inorganic pigment and filler according to a mass ratio, mix them evenly, and prepare a water-based coating;

[0029] S2, applying the water-based paint on the base fabric layer, and drying it to form a flame retardant coating;

[0030] S3, applying the surface coating on the flame retardant coating, and drying again to form a surface layer.

[0031] In some embodiments of the present invention, the mixing in step S1 is performed at room temperature, which is 20-30°C.

[0032] In some embodiments of the present invention, the scraping in step S2 is performed by a scraper, and the scraping speed is 5 to 50 m / min.

[0033] In some embodiments of the present invention, the coating ratio of the water-based coating on the base fabric layer in step S2 is 70-150 g / m 2 , can be 70~80g / m 2 , 80~90g / m 2 , 90~100g / m 2 , 100~110g / m 2 , 110~120g / m 2 , 120~130g / m 2 , 130~140g / m 2 , can also be 140 ~ 150g / m 2 By controlling the coating ratio of the water-based paint on the base fabric layer, the depth of the water-based paint penetrating into the base fabric layer can be adjusted, thereby affecting the structure of the coating and controlling the weight of the flame-retardant coating, so that the flame-retardant wall cloth can achieve the required flame-retardant performance.

[0034] In some embodiments of the present invention, the drying temperature in step S2 is 80-120°C, which can be 80-90°C, 90-100°C, 100-110°C, and can also be 110-120°C; the drying time is 90-150s, which can be 90-100s, 100-110s, 110-120s, 120-130s, 130-140s, and can also be 140-150s; preferably, the drying temperature is 120°C and the drying time is 90s; the drying temperature is 100°C and the drying time is 120s; or the drying temperature is 80°C and the drying time is 150s. In the present invention, the drying conditions have an important influence on the structure formed by inorganic fillers of different particle sizes and the porosity of the coating, thereby affecting the flame retardant properties of the flame retardant wall cloth.

[0035] In some embodiments of the present invention, the coating in step S3 is performed using a coating machine at a coating speed of 5 to 50 m / min.

[0036] In some embodiments of the present invention, the temperature of the re-drying in step S3 is 60-180°C, which can be 80-90°C, 90-100°C, 100-110°C, 110-120°C, 120-130°C, 140-150°C, 150-160°C, 160-170°C, and can also be 170-180°C; the drying time is 90-180s, which can be 90-100s, 100-110s, 110-120s, 120-130s, 130-140s, 140-150s, 150-160s, 160-170s, and can also be 170-180s.

[0037] In some embodiments of the present invention, the surface layer is further comprised of embossing or printing patterns. The embossing pattern is usually achieved by embossing with an embossing machine. Preferably, the embossing pressure is 20 to 100 tons; the embossing temperature is 100 to 180°C; and the embossing time is 5 to 180 seconds.

[0038] The specific embodiments of the present invention are further described in detail below in conjunction with preferred embodiments. When the embodiments provide numerical ranges, it should be understood that, unless otherwise specified in the present invention, the two endpoints of each numerical range and any numerical value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning as those generally understood by those skilled in the art. In addition to the specific methods, equipment, and materials used in the embodiments, as those skilled in the art grasp the prior art and record the present invention, any methods, equipment, and materials of the prior art similar or equivalent to the methods, equipment, and materials described in the embodiments of the present invention can also be used to realize the present invention.

[0039] Unless otherwise specified, the experimental methods, detection methods, and preparation methods disclosed in the present invention all adopt conventional techniques in the relevant technical fields. Unless otherwise specified, the materials and equipment used in the present invention are all commercially available.

[0040] The raw material information of each component used in the following examples and comparative examples is as follows:

[0041] Spunlace nonwoven fabric, polyester fiber material, weight 60~120g / m 2 , purchased from Hangzhou Xingnong Textile Co., Ltd.;

[0042] Polyethylene vinyl acetate copolymer emulsion, solid content 58±1wt%, purchased from Chongqing Chuanwei Chemical Co., Ltd., Sinopec Group;

[0043] Polyvinyl alcohol powder was purchased from Changchun Chemical (Jiangsu) Co., Ltd.

[0044] Water-based acrylic emulsion, solid content 42±1 wt%, purchased from Nanjing Gutian Chemical Co., Ltd.;

[0045] Calcium carbonate, 1000 mesh, 800 mesh, 600 mesh, 300 mesh, purchased from Zhejiang Fu Mining Co., Ltd.;

[0046] Kaolin, 1000 mesh and 800 mesh, purchased from Shanghai Zhenli Chemical Co., Ltd.;

[0047] Talc, 1000 mesh and 800 mesh, purchased from Shanghai Zhenli Chemical Co., Ltd.;

[0048] Titanium dioxide was purchased from Tianjin Master Technology Co., Ltd.

[0049] Example 1

[0050] 1. Preparation of water-based coatings

[0051] (1) firstly dissolving polyvinyl alcohol powder in water at 50° C. to prepare a polyvinyl alcohol emulsion with a mass fraction of 20%, then mixing ethylene-vinyl acetate copolymer emulsion, polyvinyl alcohol emulsion and aqueous acrylic emulsion in a mass ratio of 2:1:1, stirring evenly, to obtain a polymer emulsion, i.e., a water-based adhesive;

[0052] (2) Calcium carbonate, kaolin, talc and titanium dioxide are added into a mixer according to a mass ratio of 1000 mesh, 800 mesh, 600 mesh and 300 mesh of 2:2:1:1 and a mass ratio of calcium carbonate, kaolin, talc and titanium dioxide of 4:1:1:1, and stirred to obtain an inorganic pigment filler;

[0053] (3) At room temperature, add an inorganic pigment filler in an amount of 1 / 3 of the mass of the water-based adhesive to the water-based adhesive and stir evenly to obtain a water-based coating for later use.

[0054] 2. Preparation of flame retardant wall covering

[0055] S1, weight is 90g / m 2 The polyester fiber spunlace nonwoven fabric is used as the base fabric layer 1;

[0056] S2, the prepared water-based paint is coated at a ratio of 120g / m 2 Apply it on the base fabric layer 1 by scrapering, put it into an oven, and dry it at 120°C for 90s to form a flame retardant coating 2;

[0057] S3, apply the surface coating at a coating ratio of 60g / m 2 The mixture was coated on the flame retardant coating 2, put into the oven again, and dried at 120°C for 90s to form a surface layer 3, thereby obtaining a flame retardant wall covering.

[0058] Example 2

[0059] Except that in the process of preparing the flame retardant wall cloth, the drying temperature in step S2 is 100° C. and the drying time is 120 s, the rest is the same as in Example 1.

[0060] Example 3

[0061] Except that in the process of preparing the flame retardant wall cloth, the drying temperature in step S2 is 80° C. and the drying time is 150 s, the rest is the same as in Example 1.

[0062] Example 4

[0063] Except that the inorganic fillers in the preparation process of the water-based coating are 1000 mesh and 800 mesh, and the mass ratio of the inorganic fillers is 1:1, the rest is the same as Example 2.

[0064] Comparative Example 1

[0065] Except that in the process of preparing the flame retardant wall cloth, the drying temperature in step S2 is 60° C. and the drying time is 180 s, the rest is the same as in Example 1.

[0066] Comparative Example 2

[0067] Except that in the process of preparing the flame retardant wall cloth, the drying temperature in step S2 is 80° C. and the drying time is 150 s, the rest is the same as in Example 4.

[0068] Comparative Example 3

[0069] Except that the inorganic fillers in the preparation process of the water-based coating are 600 mesh and 300 mesh, and the mass ratio of the inorganic fillers is 1:1, the rest is the same as Example 2.

[0070] Comparative Example 4

[0071] Except that in the preparation process of water-based paint, the inorganic fillers are 600 mesh and 300 mesh, and the mass ratio of the two is 1:1, and in the preparation process of flame-retardant wall cloth, the drying temperature in step S2 is 80° C. and the drying time is 150 s, the rest is the same as Example 2.

[0072] Comparative Example 5

[0073] Except that the inorganic fillers in the preparation process of the water-based coating are 1000 mesh and 800 mesh, and the mass ratio of the inorganic fillers is 4:1, the rest is the same as in Example 2.

[0074] Test method for self-extinguishing time after fire: cut the sample to be tested into a length × width of 20cm × 5cm, ignite the sample with an open flame, remove the open flame, and observe how long it takes for the sample to extinguish, which is the self-extinguishing time after fire. If it extinguishes within 10s, it is considered as the self-extinguishing level after fire.

[0075] Flame retardant performance test: The test is based on GB 8624-2012 "Classification of Combustion Performance of Building Materials and Products", GB / T20284-2006 "Monomer Combustion Test for Building Materials or Products" and GB / T8626-2007 "Test Method for Flammability of Building Materials". The sample's monomer combustion test, flammability, smoke production characteristics and combustion drippings / particles and other combustion performances meet the B1 (B-s1, d0) level combustion performance requirements for qualified, if not reach the requirements for unqualified.

[0076] The flame retardant wall coverings prepared in Examples 1 to 4 and Comparative Examples 1 to 5 were tested for product performance, and the test results are shown in Table 1 below.

[0077] Table 1

[0078]

[0079]

[0080] As can be seen from Table 1, the flame-retardant wall cloths prepared in Examples 1 to 4 of the present invention have a self-extinguishing time of less than 10 seconds, which meets the B1 fire rating. Compared with Example 1, the drying temperature of Comparative Example 1 is lower, and the flame-retardant wall cloth prepared does not meet the B1 fire rating. This may be due to the low drying temperature, the flame-retardant coating formed by the water-based paint is denser, and the porosity is lower, resulting in a decrease in flame retardant performance. The mesh number and ratio of the inorganic filler in Comparative Example 2 are the same as those in Example 4. The drying temperature in step S2 is 80°C and the drying time is 150s. The flame-retardant wall cloth prepared does not meet the B1 fire rating. This may be due to the long drying time affecting the structure of the flame-retardant coating, resulting in a decrease in flame retardant performance. Compared with Example 2, the inorganic fillers in the preparation process of the water-based paint in Comparative Example 3 are 600 mesh and 300 mesh, and the mass ratio of the two is 1:1. The flame-retardant wall cloth prepared does not meet the B1 fire rating. This may be due to the excessively large particle size of the inorganic filler, resulting in an excessively high porosity of the coating and a decrease in flame retardant performance. Compared with Example 2, the inorganic fillers in Comparative Example 4 are 600 mesh and 300 mesh, and the mass ratio of the two is 1:1. The drying conditions are adjusted to a drying temperature of 80°C and a drying time of 150s. The drying temperature is lowered and the drying time is extended in order to improve the effect of the increase in the particle size of the inorganic filler on the porosity of the coating. The results show that the flame retardant wall cloth prepared still does not meet the flame retardant requirements; the inorganic fillers in Comparative Example 5 are 1000 mesh and 800 mesh, and the mass ratio is 4:1. The flame retardant wall cloth prepared does not meet the flame retardant requirements, indicating that the appropriate particle size and ratio of the inorganic filler are important factors for the flame retardant wall cloth to achieve the required flame retardant properties.

[0081] In summary, the present invention prepares B1-level flame-retardant wall cloth by selecting inorganic pigments and fillers with specific particle sizes and proportions, and adjusting the proportion between inorganic pigments and fillers and water-based adhesives. The preparation is simple, the cost is low, and it is more environmentally friendly. The present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0082] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A flame retardant wall covering, characterized in that: It includes a base fabric layer, a flame retardant coating and a surface layer; the flame retardant coating is formed by a water-based coating coated on the base fabric layer; the surface layer is formed by a surface layer coating coated on the flame retardant coating; the water-based coating includes a water-based adhesive and an inorganic pigment filler, and the mass ratio of the water-based adhesive to the inorganic pigment filler is 1:2-4; the inorganic pigment filler includes an inorganic filler and titanium dioxide, the mesh size of the inorganic filler particle size includes 1000 mesh and 800 mesh, and the mass ratio of the 1000 mesh inorganic filler to the 800 mesh inorganic filler is 1-2:1-2.

2. The flame retardant wall covering according to claim 1, characterized in that: The mesh size of the inorganic filler particle size also includes 600 mesh and 300 mesh, and the mass ratio of the 1000 mesh inorganic filler, the 800 mesh inorganic filler, the 600 mesh inorganic filler and the 300 mesh inorganic filler is 1-2:1-2:1-2:1-2.

3. The flame retardant wall covering according to claim 1, characterized in that: The base fabric layer has a grammage of 60 to 120 g / m 2 The flame retardant coating has a gram weight of 90 to 200 g / m 2 .

4. The flame retardant wall covering according to claim 1, characterized in that: Includes one or more of the following characteristics: (a) the base fabric layer is a non-woven fabric, preferably a spunlace non-woven fabric or a needle-punched non-woven fabric; (b) the aqueous adhesive comprises a polymer emulsion, wherein the polymer emulsion is obtained by mixing an ethylene-vinyl acetate copolymer emulsion, a polyvinyl alcohol emulsion and an aqueous acrylic emulsion in a mass ratio of 1 to 3:1 to 2:1 to 2; (c) The inorganic pigment and filler are obtained by mixing calcium carbonate, kaolin, talc and titanium dioxide in a mass ratio of 1 to 4:1 to 2:1 to 2:1; (d) The surface layer is provided with an embossed pattern or a printed pattern.

5. The flame retardant wall covering according to claim 4, characterized in that: The non-woven fabric is made of polyester fiber.

6. The method for preparing the flame retardant wall cloth according to any one of claims 1 to 5, characterized in that: The steps include: S1. Take a water-based adhesive and an inorganic pigment and filler according to a mass ratio, mix them evenly, and prepare a water-based coating; S2, applying the water-based paint on the base fabric layer, and drying it to form a flame retardant coating; S3, applying the surface coating on the flame retardant coating, and drying again to form a surface layer.

7. The method for preparing the flame retardant wall cloth according to claim 5, characterized in that: The mixing in step S1 is performed at room temperature.

8. The method for preparing the flame retardant wall cloth according to claim 5, characterized in that: The scraping in step S2 is performed by a scraper at a speed of 5 to 50 m / min; and / or the coating ratio of the water-based paint on the base fabric layer is 70 to 150 g / m 2 ; And / or, the drying temperature is 80-120° C., and the drying time is 90-150 seconds.

9. The method for preparing the flame retardant wall cloth according to claim 5, characterized in that: The coating in step S3 is performed by a coating machine at a coating speed of 5 to 50 m / min; and / or the secondary drying temperature is 60 to 180° C. for 90 to 180 s.

10. The method for preparing the flame retardant wall cloth according to claim 5, characterized in that: It also includes embossing or printing patterns on the surface layer.

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