Roller shutter fabric and production process thereof

Abstract

The roller shutter fabric comprises a cloth layer, a priming layer, a blackening layer and a surface layer which are sequentially arranged, and the coating formula of the surface layer comprises an acrylate mixture, a dispersing agent, a wetting agent, filler, a foaming agent, a foam stabilizer, a penetrating agent, a thickening agent, a flame retardant, a cross-linking agent and ammonia water. The flame retardant comprises a modified ammonium polyphosphate mixture, the modified ammonium polyphosphate mixture is obtained by modifying ammonium polyphosphate with silane and then mixing the modified ammonium polyphosphate with modified collagen, and the finally obtained roller shutter fabric has good flame retardance and good fracture resistance at the same time.

Description

Technical Field

[0001] This application relates to the field of roller blind fabrics, and in particular to a roller blind fabric and its manufacturing process. Background Technology

[0002] High-latitude regions have cold climates with long, low-temperature winters and relatively short days. Some locations may use heating equipment or open flames for warmth, increasing the risk of fire. Furthermore, the low temperatures in some high-latitude regions, reaching tens of degrees below zero in winter, make roller blind materials brittle. Strong winds in these areas can also cause frequent swaying and folding of the blinds, generating significant stress and making them prone to cracking. Therefore, roller blinds used in high-latitude regions need to possess both excellent flame-retardant properties and good tear resistance to ensure that in the event of an accidental fire, they can provide time for evacuation and firefighting, reducing fire damage and extending the lifespan of the blinds.

[0003] However, in the existing technology, Chinese patent CN114645468A discloses a method for preparing a low-temperature tear-resistant roller blind fabric, which uses a mixed emulsion composed of acrylic ester emulsion, acrylic ester oligomer emulsion, and polyurethane dispersion emulsion, and adds hydroxylated fullerene to improve the low-temperature tear resistance of the roller blind fabric, but it does not have good flame retardant properties. Chinese patent CN119194869A discloses a flame-retardant fiber curtain fabric, which introduces two flame retardants, nano-silica and nano-magnesium hydroxide, to form a synergistic flame retardant mechanism to achieve a flame retardant effect, but it does not have low-temperature tear resistance.

[0004] In summary, among the publicly available technologies, almost no fabrics possess both good flame retardancy and good tear resistance, making it difficult to meet the requirements for roller blinds used in high-latitude regions. Therefore, it is crucial to provide a roller blind fabric that simultaneously possesses good flame retardancy and good tear resistance. Summary of the Invention

[0005] To address the aforementioned deficiencies in the existing technology, in a first aspect, this application provides a roller blind fabric comprising a fabric layer, a base layer, a black coating layer, and a top layer arranged sequentially. The coating formulation of the top layer includes: an acrylate mixture, a dispersant, a wetting agent, a filler, a foaming agent, a foam stabilizer, a penetrant, a thickener, a flame retardant, a crosslinking agent, and ammonia. The flame retardant includes a modified ammonium polyphosphate mixture, which is obtained by modifying ammonium polyphosphate with silane and then mixing it with modified collagen.

[0006] By adopting the above technical solution, the surface coating formulation includes a modified ammonium polyphosphate mixture. This mixture is obtained by modifying ammonium polyphosphate with silane and then mixing it with modified collagen. Silane can coat the ammonium polyphosphate, making it less prone to swelling when exposed to ammonia, thus reducing its impact on foaming performance. Therefore, adding modified ammonium polyphosphate can improve the flame retardant properties of the roller blind fabric without affecting foaming. When mixed with modified collagen, the triple helix structure and cross-linked network of collagen give it high stability, excellent tensile and compressive strength, and good bending resistance at low temperatures. Furthermore, the modified collagen can further improve its mechanical and flame retardant properties. Moreover, the helical structure of collagen proteins strengthens the intermolecular forces, increasing the strength and stability of the foam shell during foaming, further reducing the impact on foaming performance. The foam is dense and the coating is more uniform, further enhancing the bending resistance of the roller blind fabric. Furthermore, the modified ammonium polyphosphate mixture can interact with other additives to obtain a coating with relatively stable properties. This results in a more uniform and dense coating during foaming, which can penetrate well into the fabric, giving the final roller blind fabric both good flame retardant properties and good tear resistance.

[0007] Preferably, the preparation method of the modified ammonium polyphosphate mixture includes the following steps: Step S1: After hydrolyzing the first silane coupling agent, it is mixed and stirred with ammonium polyphosphate in an inert solvent, filtered and dried to obtain modified ammonium polyphosphate; Step S2: After hydrolyzing the collagen, add phytic acid and mix. Then, hydrolyze the second silane coupling agent and add it dropwise to the mixture. After drying, the modified collagen is obtained. Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add silica sol solution and continue to mix thoroughly. After ball milling, dry and pulverize, obtain the modified ammonium polyphosphate mixture.

[0008] By adopting the above technical solution, ball milling can fully combine the two without damaging their structure, and the silica sol can enter the gaps between the modified ammonium polyphosphate and the modified collagen, making their bond stronger and further improving the bending resistance of the roller blind fabric.

[0009] Preferably, the first silane coupling agent is 3-aminopropyltriethoxysilane or γ-mercaptopropyltrimethoxysilane; the second silane coupling agent is dodecyltriethoxysilane or dodecylmethyldimethoxysilane.

[0010] By adopting the above technical solution, the long chain of the second silane coupling agent can further enhance the tensile strength of collagen. However, the long chain has hydrophobic properties. On the other hand, the hydrophilic group of the first silane coupling agent can reduce the hydrophobicity of the modified ammonium polyphosphate mixture and reduce the impact on foaming.

[0011] Preferably, in step S2, the mass ratio of collagen to phytic acid is 1:(1~1.5).

[0012] Preferably, in step S2, after adding phytic acid, the temperature is heated to 30-50 degrees Celsius. o C, after reacting under ultrasound for 1-3 hours, add the second silane coupling agent.

[0013] Preferably, the acrylate mixture comprises a first acrylate dispersion, a second acrylate dispersion, and an acrylate oligomer emulsion, wherein the Tg of the first acrylate dispersion is 20~50 °C, and the Tg of the second acrylate dispersion is -50~0 °C.

[0014] Preferably, the modulus of the first acrylate dispersion is 15-30 MPa, and the modulus of the second acrylate dispersion is 0.5-3 MPa.

[0015] Preferably, the acrylate oligomer emulsion has a particle size of 40-90 nm and a molecular weight of 5000-200000.

[0016] By adopting the above technical solution, using an acrylate mixture obtained by mixing a high-Tg acrylate dispersion, a low-Tg acrylate dispersion, and an acrylate oligomer emulsion, the roller blind fabric can maintain a certain stiffness while also having better coating performance for other additives, reducing the impact on foaming, and further improving its tear resistance.

[0017] Preferably, the flame retardant further includes melamine, polyol organic compounds, aluminum diethylphosphite, and cyclic phosphates.

[0018] Preferably, the coating formulation of the surface layer includes: 2-20 parts of a first acrylate dispersion, 2-15 parts of a second acrylate dispersion, 1-10 parts of an acrylate oligomer emulsion, 0.1-1 parts of a dispersant, 0.1-1 parts of a wetting agent, 3-40 parts of a filler, 0.5-3 parts of a foaming agent, 0.1-1 parts of a foam stabilizer, 0.1-1 parts of a penetrant, 0.1-3 parts of a thickener, 5-35 parts of a modified ammonium polyphosphate mixture, 2-15 parts of melamine, 0.5-6 parts of a polyol organic compound, 2-10 parts of aluminum diethylphosphite, 1-6 parts of a cyclic phosphate ester, 0.3-3 parts of a crosslinking agent, and 0.1-3 parts of ammonia.

[0019] Secondly, this application provides a manufacturing process for roller blind fabric, including the following steps: Step 1: Apply a waterproof, mildew-proof, and antibacterial treatment to the fabric layer; Step 2: After foaming the water and white paste, apply it to the fabric layer, and then bake, roll, cool and roll it to form the base layer; Step 3: After foaming the water and black paste, apply it to the base layer, and then bake, roll, cool and roll it to form the black coating layer. Step 4: After foaming the coating obtained according to the coating formula of the surface layer described above, apply it to the black coating layer, and then bake, roll, cool and roll it to form the roller blind fabric.

[0020] Preferably, in steps 2-4, the baking process involves seven oven sections, with temperatures set sequentially as follows: 80-100-120-140-140-120-100. o C.

[0021] In summary, this application has the following beneficial effects: 1. The roll fabric provided in this application has a coating formulation for the surface layer including a modified ammonium polyphosphate mixture. The modified ammonium polyphosphate mixture is obtained by modifying ammonium polyphosphate with silane and then mixing it with modified collagen. The modified ammonium polyphosphate and the modified collagen can improve the flame retardant and tear resistance of the roll fabric.

[0022] 2. The coating formulation of the surface layer provided in this application can produce fine and dense foam during foaming, so that gaps are not easily generated during coating, thereby giving the final roller blind fabric better bending resistance. Detailed Implementation

[0023] Preparation Example

[0024] The following are examples of the preparation of modified ammonium polyphosphate mixtures. The collagen used in the following examples is commercially available. To reduce costs, collagen can be prepared from fish skin; the preparation method can be found in existing publicly available technologies and will not be elaborated here.

[0025] Preparation Example 1 Step S1: After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the 3-aminopropyltriethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0026] Step S2: After hydrolyzing 1.2 kg of collagen, add 1.2 kg of phytic acid and heat to 50°C. oC, react under ultrasound for 2 h, then add 200 g of hydrolyzed dodecyltriethoxysilane dropwise to the mixture and mix, at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0027] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and ball mill for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0028] Preparation Example 2 Step S1: After completely hydrolyzing 220 g of γ-mercaptopropyltrimethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the γ-mercaptopropyltrimethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0029] Step S2: After hydrolyzing 1.2 kg of collagen, add 1.8 kg of phytic acid and heat to 30°C. o C, react under ultrasound for 3 h, then add 200 g of hydrolyzed dodecyltriethoxysilane dropwise to the mixture for further mixing, and then at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0030] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and ball mill for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0031] Preparation Example 3 Step S1: After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the 3-aminopropyltriethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0032] Step S2: After hydrolyzing 1.2 kg of collagen, add 1.2 kg of phytic acid and heat to 50°C. o C, react under ultrasound for 2 h, then add 200 g of hydrolyzed dodecyltriethoxysilane dropwise to the mixture and mix, at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0033] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, ball mill directly for 3 hours, dry and pulverize to obtain the modified ammonium polyphosphate mixture.

[0034] Preparation Example 4 Step S1: After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the 3-aminopropyltriethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0035] Step S2: After hydrolyzing 1.2 kg of collagen, add 1.2 kg of phytic acid and heat to 50°C. o C, react under ultrasound for 2 h, then add 200 g of hydrolyzed dodecyltriethoxysilane dropwise to the mixture and mix, at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0036] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and continue stirring for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0037] Preparation Example 5 Step S1: After completely hydrolyzing 220 g of perfluorooctyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the perfluorooctyltriethoxysilane hydrolysate while stirring at 50°C. o Continue stirring at C for 5 hours, then filter and dry to obtain modified ammonium polyphosphate.

[0038] Step S2: After hydrolyzing 1.2 kg of collagen, add 1.2 kg of phytic acid and heat to 50°C. o C, react under ultrasound for 2 h, then add 200 g of hydrolyzed trimethoxysilane dropwise to the mixture and mix, at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0039] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and ball mill for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0040] Preparation Example 6 Step S1: After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the 3-aminopropyltriethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0041] Step S2: After hydrolyzing 1.2 kg of collagen, hydrolyze 200 g of dodecyltriethoxysilane and add it dropwise to the mixture for mixing. The mixture is then stirred at 50°C. o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0042] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and ball mill for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0043] Preparation Example 7 Step S1: After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, disperse 5 kg of ammonium polyphosphate in cyclohexane under high-speed stirring, and add the 3-aminopropyltriethoxysilane hydrolysate while stirring at 50 °C. o Continue stirring at C for 5 h, then filter and dry to obtain modified ammonium polyphosphate.

[0044] Step S2: After hydrolyzing 1.2 kg of collagen, add 1 kg of phytic acid and heat to 60°C. o C, react under ultrasound for 1 hour, then add 200 g of hydrolyzed dodecyltriethoxysilane dropwise to the mixture and mix, at 50 o The reaction was continued at C for 5 h, and the modified collagen was obtained after filtration and drying.

[0045] Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add 600 g of silica sol solution (solid content 30%) and ball mill for 3 h. After drying and pulverizing, obtain the modified ammonium polyphosphate mixture.

[0046] Comparative Preparation Example 1 Mix 5 kg of ammonium polyphosphate and 1.2 kg of collagen evenly and set aside.

[0047] Comparative Preparation Example 2 After completely hydrolyzing 220 g of 3-aminopropyltriethoxysilane, 5 kg of ammonium polyphosphate was dispersed in cyclohexane under high-speed stirring. The 3-aminopropyltriethoxysilane hydrolysate was added while stirring, and the mixture was kept at 50 °C. o Continue stirring at C for 5 h, filter and dry to obtain modified ammonium polyphosphate. No collagen was added during mixing in this preparation example. Example

[0048] The following example illustrates the manufacturing process of roller blind fabric. The manufacturing process used is similar to that disclosed in our Chinese patent CN114645468A, and includes the following steps: Step 1: The fabric to be made is normally pulled into the water tank through the shuttle and rollers. Waterproof, mildew-proof and antibacterial additives are added to the water tank to soak and roll the fabric. Then, it goes through the flatness stretching, high temperature baking, cooling and shaping and rolling operations to complete the waterproofing and shaping of the original fabric. Step 2: Filter the base white paste through a mesh screen, and then use a foaming machine to aerate the water and white paste mixture in a certain proportion to obtain a foam-like substance. Pass the shaped fabric obtained in Step 1 through a coating machine, and set the distance between the coating machine blade and the fabric surface, i.e., the blade distance. The coated fabric is then baked at high temperature in an oven, and then squeezed and cooled by a rolling mill to form a white, smooth, and soft paste layer. When it reaches the rolling machine at the very front, the smoothness and viscosity of the paste surface must be checked. Step 3: Filter the middle layer of black paste with a new mesh and mix it with water. After being aerated and foamed in a foaming machine according to the ratio, apply it evenly to the surface of the first layer of paste in Step 2 above using a coating knife. Then, it goes through high-temperature baking, rolling, cooling and rolling operations. Step 4: Filter the color paste through a new mesh screen, and use a coating knife to make the prepared coating formula into a coffee-colored color paste. Pass it through a foaming machine and apply it to the black paste surface from Step 3 above with a certain foaming ratio of paste, water and air. Then, it goes through high-temperature baking, rolling, cooling and rolling operations to complete the process.

[0049] In steps 2-4 above, the baking process involves a 7-section oven with temperatures set sequentially as follows: 80-100-120-140-140-120-100. o C.

[0050] The roller blind fabrics in the following embodiments are all made using the above-described production process, the difference being that the coating formula used in step 4 is different.

[0051] Example 1: The coating formulation used in step 4 of Example 1 is as follows: 10 parts of first acrylate dispersion, 10 parts of second acrylate dispersion and 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 1, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0052] The first acrylate dispersion has a Tg of 20–50 °C and a modulus of 15–30 MPa. The second acrylate dispersion has a Tg of -50–0 °C and a modulus of 0.5–3 MPa. The acrylate oligomer emulsion has a particle size of 40–90 nm and a molecular weight of 5,000–200,000. The titanium dioxide is rutile or anatase. The dispersant is a modified polymer. The wetting agent is an anionic surfactant with a hydrophilic group smaller than a hydrophobic group to reduce interfacial tension. The foaming agent is an octadecyl sulfonate ammonium or sodium dodecyl sulfate. The foam stabilizer is an ammonium stearate stabilizer. The penetrant is a nonionic surfactant of fatty alcohol polyoxyethylene ether. The thickener is an alkali-swellable acrylate copolymer. The polyol organic compound is dipentaerythritol or pentaerythritol. The crosslinking agent is an organosilicon or carboimide crosslinking agent.

[0053] The other additives used in the following examples and comparative examples all use the substances listed above, so they will not be described again in the following examples.

[0054] Example 2: The coating formulation used in step 4 of Example 2 is as follows: 2 parts of first acrylate dispersion, 2 parts of second acrylate dispersion and 1 part of acrylate oligomer emulsion, 0.1 parts of dispersant, 0.1 parts of wetting agent, 2 parts of titanium dioxide and 1 part of kaolin as filler, 0.5 parts of foaming agent, 0.1 parts of foam stabilizer, 0.1 parts of penetrant, 0.1 parts of thickener, 5 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 2, 2 parts of melamine, 0.5 parts of polyol organic matter, 2 parts of aluminum diethylphosphite, 1 part of cyclic phosphate, 0.3 parts of crosslinking agent and 0.1 parts of ammonia.

[0055] Example 3: The coating formulation used in step 4 of Example 3 is as follows: 20 parts of first acrylate dispersion, 15 parts of second acrylate dispersion and 10 parts of acrylate oligomer emulsion, 1 part of dispersant, 1 part of wetting agent, 25 parts of titanium dioxide and 15 parts of kaolin as fillers, 3 parts of foaming agent, 1 part of foam stabilizer, 1 part of penetrant, 3 parts of thickener, 35 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 3, 15 parts of melamine, 6 parts of polyol organic matter, 10 parts of aluminum diethylphosphite, 6 parts of cyclic phosphate, 3 parts of crosslinking agent and 3 parts of ammonia.

[0056] Example 4: The coating formulation used in step 4 of Example 4 is as follows: 10 parts of first acrylate dispersion, 10 parts of second acrylate dispersion and 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 4, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0057] Example 5: The coating formulation used in step 4 of Example 5 is as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of the modified ammonium polyphosphate mixture obtained in Preparation Example 5, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0058] Example 6: The coating formulation used in step 4 of Example 6 is as follows: 30 parts of first acrylate dispersion, 1 part of second acrylate dispersion and 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 5 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 40 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 1, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 5 parts of ammonia.

[0059] Example 7: The coating formulation used in step 4 of Example 7 is as follows: 1 part of first acrylate dispersion, 25 parts of second acrylate dispersion and 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 0.4 parts of foaming agent, 0.05 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 4 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 1, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0060] Example 8: The coating formulation used in step 4 of Example 8 is as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of the acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 36 parts of the modified ammonium polyphosphate mixture obtained in Preparation Example 1, 2 parts of crosslinking agent and 2 parts of ammonia water.

[0061] Example 9: The coating formulation used in step 4 of Example 9 is as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of the acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of the modified ammonium polyphosphate mixture obtained in Preparation Example 6, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0062] Example 10: The coating formulation used in step 4 of Example 10 is as follows: 10 parts of first acrylate dispersion, 10 parts of second acrylate dispersion and 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of modified ammonium polyphosphate mixture obtained in Preparation Example 7, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of aluminum diethylphosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0063] Comparative Example 1 The coating formulation used in step 4 of Comparative Example 1 was as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of the acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of the modified ammonium polyphosphate mixture obtained in Comparative Preparation Example 1, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of diethylaluminum hypophosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent, and 2 parts of ammonia.

[0064] Comparative Example 2 The coating formulation used in step 4 of Comparative Example 1 was as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 25 parts of the modified ammonium polyphosphate mixture obtained in Comparative Preparation Example 2, 10 parts of melamine, 3 parts of polyol organic matter, 5 parts of diethylaluminum hypophosphite, 3 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0065] Comparative Example 3 The coating formulation used in step 4 of Comparative Example 3 is as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 20 parts of melamine, 8 parts of polyol organic matter, 10 parts of diethyl aluminum hypophosphite, 8 parts of cyclic phosphate, 2 parts of crosslinking agent and 2 parts of ammonia.

[0066] Comparative Example 4 The coating formulation used in step 4 of Comparative Example 4 is as follows: 10 parts of the first acrylate dispersion, 10 parts of the second acrylate dispersion, 5 parts of acrylate oligomer emulsion, 0.5 parts of dispersant, 0.5 parts of wetting agent, 15 parts of titanium dioxide and 10 parts of kaolin as fillers, 2 parts of foaming agent, 0.5 parts of foam stabilizer, 0.5 parts of penetrant, 2 parts of thickener, 2 parts of crosslinking agent and 2 parts of ammonia.

[0067] Performance testing

[0068] The roller blind fabrics obtained in Examples 1-10 and Comparative Examples 1-4 were subjected to flame retardancy tests and bending resistance tests in accordance with the requirements of GB / T5455, GB / T 5454 and NFPA701.

[0069] Table 1. Flame retardant performance test results of Examples 1-10 and Comparative Examples 1-4 according to GB / T 5455 and GB / T 5454 standards.

[0070] Table 2. Flame retardant performance test results of Examples 1-10 and Comparative Examples 1-4 according to NFPA 701 standard requirements.

[0071] Table 3. Test results of the bending resistance of the roller blind fabrics obtained in Examples 1-10 and Comparative Examples 1-4.

[0072] The test results above show that the roller blind fabric prepared using the production process disclosed in this application has good flame-retardant properties. (0) o At temperatures above C, the difference in flexural strength is not significant, but at 0°C... o Below C, the difference in tear resistance is obvious, which indicates that the roller blind fabric prepared by the production process of this application has both good flame retardant properties and tear resistance under low temperature conditions.

[0073] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A roller blind fabric, comprising a fabric layer, a base layer, a black coating layer, and a top layer arranged sequentially, characterized in that, The coating formulation of the surface layer includes: an acrylate mixture, a dispersant, a wetting agent, a filler, a foaming agent, a foam stabilizer, a penetrant, a thickener, a flame retardant, a crosslinking agent, and ammonia. The flame retardant includes a modified ammonium polyphosphate mixture, which is obtained by modifying ammonium polyphosphate with silane and then mixing it with modified collagen.

2. The roller blind fabric according to claim 1, characterized in that, The preparation method of the modified ammonium polyphosphate mixture includes the following steps: Step S1: After hydrolyzing the first silane coupling agent, it is mixed and stirred with ammonium polyphosphate in an inert solvent, filtered and dried to obtain modified ammonium polyphosphate; Step S2: After hydrolyzing the collagen, add phytic acid and mix. Then, hydrolyze the second silane coupling agent and add it dropwise to the mixture. After drying, the modified collagen is obtained. Step S3: Mix the modified ammonium polyphosphate and modified collagen evenly, then add silica sol solution and continue to mix thoroughly. After ball milling, dry and pulverize, obtain the modified ammonium polyphosphate mixture.

3. The roller blind fabric according to claim 2, characterized in that, The first silane coupling agent is 3-aminopropyltriethoxysilane or γ-mercaptopropyltrimethoxysilane; the second silane coupling agent is dodecyltriethoxysilane or dodecylmethyldimethoxysilane.

4. The roller blind fabric according to claim 2, characterized in that, In step S2, the mass ratio of collagen to phytic acid is 1:(1~1.5).

5. The roller blind fabric according to claim 2, characterized in that, In step S2, after adding phytic acid, the temperature is heated to 30-50 degrees Celsius. o C, after reacting under ultrasound for 1-3 hours, add the second silane coupling agent.

6. The roller blind fabric according to claim 1, characterized in that, The acrylate mixture comprises a first acrylate dispersion, a second acrylate dispersion, and an acrylate oligomer emulsion, wherein the Tg of the first acrylate dispersion is 20~50 °C, and the Tg of the second acrylate dispersion is -50~0 °C.

7. The roller blind fabric according to any one of claims 1-6, characterized in that, The flame retardant also includes melamine, polyol organic compounds, aluminum diethylphosphite, and cyclic phosphates.

8. The roller blind fabric according to claim 7, characterized in that, The coating layer comprises the following raw materials in parts by weight: 2-20 parts of a first acrylate dispersion, 2-15 parts of a second acrylate dispersion, 1-10 parts of an acrylate oligomer emulsion, 0.1-1 parts of a dispersant, 0.1-1 parts of a wetting agent, 3-40 parts of a filler, 0.5-3 parts of a foaming agent, 0.1-1 parts of a foam stabilizer, 0.1-1 parts of a penetrant, 0.1-3 parts of a thickener, 5-35 parts of a modified ammonium polyphosphate mixture, 2-15 parts of melamine, 0.5-6 parts of a polyol organic compound, 2-10 parts of aluminum diethylphosphite, 1-6 parts of a cyclic phosphate ester, 0.3-3 parts of a crosslinking agent, and 0.1-3 parts of ammonia.

9. A manufacturing process for roller blind fabric, characterized in that, Includes the following steps: Step 1: Apply a waterproof, mildew-proof, and antibacterial treatment to the fabric layer; Step 2: After foaming the water and white paste, apply it to the fabric layer, and then bake, roll, cool and roll it to form the base layer; Step 3: After foaming the water and black paste, apply it to the base layer, and then bake, roll, cool and roll it to form the black coating layer. Step 4: After foaming the coating obtained according to the coating formulation of any one of claims 1-8, the coating is applied to the black coating layer, and then baked, rolled, cooled and rolled to form the roller blind fabric.

10. The manufacturing process of the roller blind fabric according to claim 9, characterized in that, In steps 2-4, the baking process involves a 7-section oven with temperatures set sequentially as follows: 80-100-120-140-140-120-100. o C.

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