Heat-insulating coated fabric with high flame retardance, easy blade coating and high welding strength and preparation method of heat-insulating coated fabric

Abstract

The invention belongs to the technical field of flame-retardant heat-insulating coated cloth, and particularly relates to high-flame-retardant heat-insulating coated cloth easy to scrape and high in welding strength and a preparation method of the high-flame-retardant heat-insulating coated cloth. Coating slurry scraped on the two sides of base cloth of the coated cloth is prepared from specific ingredients of polyvinyl chloride resin powder, a plasticizer, a flame-retardant plasticizer, a powder flame retardant, a whitening agent, a stabilizer, other functional filler, a viscosity reducer and glue, the coated cloth meets the NFPA 701-2 flame-retardant standard, the reflectivity is not lower than 87%, the high-frequency welding peel strength is not lower than 110 N / m, the hot-air welding peel strength is not lower than 105 N / m, and the heat resistance is not lower than 87%. The composite material has the advantages of high reflectivity, high flame retardance, high welding stability and the like, thereby being suitable for serving as a flame-retardant heat-insulating material of a building top floor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of flame-retardant and heat-insulating coated fabric, and particularly relates to a high-flame-retardant, easy-to-coat, high-welding-strength and heat-insulating coated fabric and a preparation method thereof. BACKGROUND

[0002] Under strong sunlight in summer, the roof space of the top layer of building structures such as industrial plants, large sports venues and residential buildings will cause the indoor temperature to rise significantly due to long-term and strong sunlight. This will lead to an increase in the use of refrigeration equipment such as air conditioners, which requires long-term high-load operation of refrigeration, resulting in huge energy consumption. The installation of heat-insulating coated fabric on the top of such buildings is beneficial to reducing the indoor temperature rise caused by light, thereby reducing energy consumption. However, as a material made of fabric and high-molecular organic matter, the heat-insulating coated fabric still needs to meet high-standard flame-retardant requirements and welding strength to meet the safety requirements of buildings (such as fire and stability).

[0003] The NFPA 701-2 flame-retardant standard (test method for flame resistance of vertically suspended textiles and films) is applicable to the temporary or permanent enclosure of buildings under construction and is the basis for determining the combustion performance of fabrics used to assemble sunshades, tents, tarpaulins, membrane structures or banners.

[0004] At present, there have been some reports on heat-insulating and flame-retardant polyvinyl chloride coated fabric, and some heat-insulating polyvinyl chloride coated fabric materials have been developed. Patent document CN103061140A discloses a production process of heat-insulating coated fabric, which requires a three-coating process; CN1172655885A discloses a heat-insulating PVC coated tent material and a preparation method thereof, which requires the use of special materials such as composite calcium carbonate modified glass microbeads. CN118814495A discloses a flame-retardant and weldable smoke-suppressing coated fabric, but the heat-insulating property is poor, the welding strength is low, and it cannot meet the requirements of the NFPA 701-2 flame-retardant standard.

[0005] Therefore, there is an urgent need to design a coated fabric with high flame retardancy, high heat insulation, high welding strength and easy sizing preparation, which reduces the difficulty of the preparation process and improves the performance of the fabric and application. SUMMARY

[0006] In view of the above problems, the present application aims to provide a high-flame-retardant, easy-to-coat and high-welding-strength heat-insulating coated fabric and a preparation method thereof.

[0007] In a first aspect, the present application provides a high flame-retardant, easy-to-scrub, high-weld-strength, heat-insulating coated fabric, which meets the NFPA 701-2 flame-retardant standard, has a reflectivity of no less than 87%, a high-frequency welding peeling strength of no less than 110 N / m, and a hot-air welding peeling strength of no less than 105 N / m; the coated fabric is made of a base fabric and a coating slurry coated on both sides of the base fabric; the coating slurry is made of the following raw materials in parts by weight:

[0008] 80-110 parts of polyvinyl chloride resin powder, 45-55 parts of plasticizer, 5-20 parts of flame-retardant plasticizer, 10-40 parts of powder flame retardant, 1-3 parts of whitening agent, 1-5 parts of stabilizer, 40-60 parts of other functional fillers, 10-30 parts of viscosity reducer, and 5-8 parts of glue.

[0009] The other functional fillers are selected from at least three of titanium white powder, 1250-mesh calcium powder, 3000-mesh calcium powder, talc powder, wollastonite, and kaolin.

[0010] The plasticizer is diisononyl phthalate; the flame-retardant plasticizer is a combination of cresyl diphenyl phosphate, resorcinol bis(diphenyl phosphate), and diphenyl isooctyl phosphate or a combination of cresyl diphenyl phosphate, triphenyl phosphate, and diphenyl isooctyl phosphate; and the powder flame retardant is a combination of 12500-mesh antimony trioxide, 5000-mesh zinc borate, and 1250-mesh magnesium hydroxide or 3000-mesh magnesium hydroxide.

[0011] Preferably, the coating slurry is made of the following raw materials in parts by weight: 90-110 parts of polyvinyl chloride resin powder, 45-50 parts of plasticizer, 8-15 parts of flame-retardant plasticizer, 28-35 parts of powder flame retardant, 1-3 parts of whitening agent, 1-3 parts of stabilizer, 50-60 parts of other functional fillers, 10-30 parts of viscosity reducer, and 5-8 parts of glue.

[0012] Preferably, the polyvinyl chloride resin powder is a paste polyvinyl chloride resin powder.

[0013] Preferably, the plasticizer is selected from at least one of diisononyl phthalate, diisodecyl phthalate, di(2-ethylhexyl) adipate, diisooctyl phthalate, and di(propylheptyl) phthalate.

[0014] Preferably, the whitening agent is selected from at least two of 4,4'-bis(2-methoxystyryl)biphenyl, sodium diphenylstyrene biphenyl disulfonate, 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene, and bis-triazine aminostilbene.

[0015] Preferably, the viscosity reducer is selected from at least one of D60 viscosity reducer, D75 viscosity reducer, D70 viscosity reducer, and D80 viscosity reducer.

[0016] Preferably, the flame-retardant plasticizer is a combination of cresyl diphenyl phosphate, resorcinol bis(diphenyl phosphate) and diphenyl isooctyl phosphate, and the weight ratio of the cresyl diphenyl phosphate, resorcinol bis(diphenyl phosphate) and diphenyl isooctyl phosphate is 1:3:1.

[0017] Preferably, the flame-retardant plasticizer is a combination of cresyl diphenyl phosphate, triphenyl phosphate and diphenyl isooctyl phosphate, and the weight ratio of the cresyl diphenyl phosphate, triphenyl phosphate and diphenyl isooctyl phosphate is 1:3:1.

[0018] A preparation method of the aforementioned high-flame-retardant easy-to-scratch high-welding-strength heat-insulating coating fabric, the preparation method comprising the following steps:

[0019] Step S1: Take materials by weight parts, disperse antimony trioxide, zinc borate and whitening agent in plasticizer, mix uniformly using a stirrer, and use a grinder to make the paste-like flame-retardant whitening paste; the amount of the plasticizer is 1 / 7-1 / 3 of the total mass of the plasticizer in the coating slurry;

[0020] Step S2: Take materials by weight parts, mix the paste-like flame-retardant whitening paste obtained in step S1 with polyvinyl chloride resin powder, stabilizer, the remaining plasticizer, magnesium hydroxide and other functional fillers, stir in a stirrer, control the slurry temperature during the process, and prepare a preliminary slurry; the amount of the viscosity reducer is 1 / 2-4 / 5 of the total mass of the viscosity reducer in the coating slurry;

[0021] Step S3: Take materials by weight parts, add the flame-retardant plasticizer to the preliminary slurry obtained in step S2, mix uniformly using a stirrer, and obtain an intermediate slurry;

[0022] Step S4: adjust the viscosity of the intermediate slurry prepared in step S3 using the remaining viscosity reducer, reach the requirements for the coating machine, add glue to obtain the coating slurry for the coating machine;

[0023] Step S5: use a blade coating device to uniformly coat the coating slurry obtained in step S4 on the base fabric, use a drying device to perform a gelation reaction, and wind up.

[0024] Preferably, the rotation speed of the stirrer in step S1 is 1000-4000 rpm;

[0025] The rotation speed of the grinder in step S1 is 800-1200 rpm;

[0026] The rotation speed of the stirrer in step S2 is 1000-4000 rpm, and the stirring is stopped when the measured temperature reaches 40-50℃;

[0027] The rotation speed of the stirrer in step S3 is 800-2000 rpm, and the stirring is stopped after 1-6 min;

[0028] The scraping speed in the step S5 is 10-20 m / min, the drying device is an oven, and the oven temperature is 160-210 DEG C.

[0029] Advantages:

[0030] Due to the mutual influence between materials in the coating slurry of the coated fabric and the lack of followable rules, it is difficult to obtain the coating slurry with high flame retardance, high heat insulation, high welding strength and easy sizing through conventional groping.

[0031] Through a large number of experiments, it is unexpectedly found that the coating slurry with specific ingredients can have the properties of high flame retardance, high heat insulation, high welding strength and easy sizing, so that the prepared coated fabric can meet the requirements of the NFPA 701-2 flame retardant standard and is heat-resistant, easy to prepare and lay.

[0032] The application uses a phosphate ester flame-retardant plasticizer to replace part of the ordinary plasticizer, thereby reducing the amount of ordinary plasticizer with strong flammability and improving the overall flame-retardant performance of the product, while the hardness meets the product requirements. The flame-retardant mechanism of the phosphate ester flame-retardant plasticizer in PVC is achieved through triple synergistic effect, which is (1) gas phase flame retardant, the phosphorus-containing free radicals (such as PO·, HPO·) generated by thermal decomposition can efficiently quench the active free radicals (H· / OH·) in the combustion chain reaction, and inhibit the flame propagation; (2) condensed phase flame retardant, the acidic product catalyzes the dehydrochlorination of PVC and promotes crosslinking to form carbon, forming a dense carbon layer to isolate oxygen and heat; (3) phosphorus-chlorine synergy, reacting with the HCl released by PVC decomposition to generate gaseous phosphorus oxychloride (POCl3), which is further decomposed into free radical trapping agents (PO· / Cl·).

[0033] When PVC is decomposed by heat, a large amount of hydrogen chloride is released. The hydrogen chloride released by PVC reacts with antimony trioxide to form intermediate products such as antimony trichloride and antimony oxychloride. The intermediate products have a relatively low boiling point and volatilize into the gas phase at a high temperature in the combustion zone. The intermediate products are thermally decomposed or form various antimony oxychlorides and chlorine radicals. The chlorine radicals have extremely high activity and preferentially react with the key radical H· in the combustion chain reaction to form HCl. The sharp decrease in the concentration of H· radicals makes the combustion chain reaction unable to continue (the key step in the growth of the combustion chain), and the flame is thus inhibited or extinguished. The above content is mainly the flame-retardant effect of the reaction between antimony trioxide and hydrogen chloride in the gas phase. Zinc oxide is a Lewis acid that can catalyze the dehydrochlorination of the PVC molecular chain, so that the PVC starts to dehydrochlorinate in large quantities at a relatively low temperature. The dehydrochlorination in advance causes the formation of a conjugated polyene structure on the PVC main chain. The polyene structure is more prone to crosslinking, cyclization and aromatization at a relatively low temperature, thereby promoting the formation of a dense and stable carbon layer on the surface of the material. Zinc borate releases crystal water when heated. The evaporation of water vapor absorbs a large amount of heat, thereby reducing the temperature in the combustion zone. The anhydrous zinc borate that loses crystal water, or the decomposition products of zinc borate such as boron trioxide, can melt and flow to cover the surface of the decomposition residue of PVC, thereby forming a dense, continuous and hard glassy protective layer and playing a condensed-phase flame-retardant role. The gas-phase flame-retardant and condensed-phase flame-retardant play a synergistic effect, so that the flame-retardant performance of the product is significantly improved.

[0034] The whitening agent can make the PVC-coated fabric material appear to have high whiteness, and can significantly improve the material's ability to reflect sunlight. The methoxy group in 4,4'-bis(2-methoxystyryl)biphenyl acts as a strong electron-donating group, enhances the electron density of the conjugated system, and improves the ultraviolet absorption efficiency and blue light emission intensity. The double diphenylstyrene conjugated structure in sodium diphenylstyrene biphenyl disulfate can prolong the excited state lifetime and has high fluorescence intensity. The benzoxazolyl group in 2,5-bis(5-tert-butyl-2-benzoxazolyl)thiophene is a strong electron-withdrawing group, and the thiophene ring is a π bridge, forming a push-pull electron system that can significantly enhance ultraviolet absorption. The tetramethylpiperidine and benzophenone groups in bis-triazine aminostilbene have both ultraviolet absorption and radical capture functions, which can effectively inhibit the yellowing of the substrate. DETAILED DESCRIPTION

[0035] The technical ideas, schemes, effects and the like of the present application are described in detail below through specific examples. The examples are only exemplary descriptions of the present application and are not considered to limit the scope of protection of the present application.

[0036] In the following embodiments, the polyvinyl chloride resin used in the examples and comparative examples is polyvinyl chloride paste resin powder (PSM-31 resin powder), the glue grade is HT-6183, and the calcium powder is calcium carbonate (heavy calcium carbonate).

[0037] Example 1 A heat resistant coated fabric passing the NFPA 701-2 flame retardant standard

[0038] The raw materials used for the coating paste are as follows in parts by weight:

[0039] 100 parts of PVC resin powder, 50 parts of diisononyl phthalate, 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, 2 parts of diphenyl isooctyl phosphate, 10 parts of 12500 mesh antimony trioxide, 5 parts of 5000 mesh zinc borate, 20 parts of 1250 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrene biphenyl disulfonate, 30 parts of 1250 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0040] The method for preparing the coated fabric includes the following steps:

[0041] 10 parts of 12500 mesh antimony trioxide, 5 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, and 1 part of sodium distyrene biphenyl disulfonate are dispersed in 10 parts of diisononyl phthalate, and a stirrer is used for dispersion at a speed of 1500 rpm. After dispersion is completed, a grinding machine is used to prepare a paste-like flame-retardant whitening paste (at a speed of 1000 rpm).

[0042] 100 parts of PVC resin powder, 40 parts of diisononyl phthalate, the paste-like flame-retardant whitening paste prepared in the previous step, 20 parts of 1250 mesh magnesium hydroxide, 30 parts of 1250 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer are mixed and added to a stirrer for stirring. When the temperature of the paste rises to 45°C, stirring is stopped.

[0043] 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, and 2 parts of diphenyl isooctyl phosphate are added, and the stirring speed of the stirrer is 1000 rpm, with a beating-up time of 2 min.

[0044] 5 parts of D80 viscosity reducer are used to adjust the viscosity of the paste to meet the requirements for use in a machine.

[0045] Before use in a machine, 6 parts of glue are added to the paste, and a doctor blade coating device is used to uniformly coat the paste on both sides of a PET mesh fabric (i.e., a base fabric). The coating machine is operated at a speed of 15 m / min for coating, and the amount of paste is controlled to make the product have a grammage of 700 g / m 2 . An oven is heated at 190°C±10°C for a gelation reaction, and then the product is wound up to obtain the required coated fabric.

[0046] Example 2 A heat shielding coated fabric passing the NFPA 701-2 flame retardant standard

[0047] The raw materials used for the coating paste are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin powder, 50 parts of diisononyl phthalate, 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, 2 parts of diphenyl isooctyl phosphate, 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 16 parts of 1250 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrene biphenyl disulfonate, 30 parts of 1250 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0048] The method for preparing the coated fabric includes the following steps:

[0049] The 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, and 1 part of sodium distyrene biphenyl disulfonate are dispersed in 10 parts of diisononyl phthalate, and a stirrer is used for dispersion at a speed of 1500 rpm. After dispersion is completed, a grinding machine is used at a speed of 1000 rpm to prepare a pasty flame-retardant whitening paste.

[0050] The 100 parts of polyvinyl chloride resin powder, 40 parts of diisononyl phthalate, the pasty flame-retardant whitening paste prepared in the previous step, 16 parts of 1250 mesh magnesium hydroxide, 30 parts of 1250 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer are mixed and added to a stirrer for stirring. The stirring speed of the stirrer is 2000 rpm. When the temperature of the paste rises to 45°C, stirring is stopped.

[0051] The 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, and 2 parts of diphenyl isooctyl phosphate are added, and the stirring speed of the stirrer is 1000 rpm. The beating-up time is 2 min.

[0052] The 5 parts of D80 viscosity reducer are used to adjust the viscosity of the paste to meet the requirements for use in a machine.

[0053] Before use in a machine, 6 parts of glue are added to the paste. A squeegee coating device is used to uniformly squeegee the paste on both sides of a PET mesh fabric. The squeegee coating machine is operated at a speed of 15 m / min. The squeegee coating speed is controlled to make the product have a grammage of 700 g / m 2 . An oven is heated at 190°C ± 10°C to perform a gelation reaction. After that, the product is wound up to obtain the required coated fabric.

[0054] Example 3 A heat shielding coated fabric passing the NFPA 701-2 flame retardant standard

[0055] The raw materials used for the coating slurry are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin, 50 parts of diisononyl phthalate, 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, 2 parts of diphenyl isooctyl phosphate, 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 16 parts of 3000 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrylbiphenyl disulfonate, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0056] The coating fabric preparation method comprises the following steps:

[0057] The 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, and 1 part of sodium distyrylbiphenyl disulfonate are dispersed in 10 parts of diisononyl phthalate, and a stirrer is used for dispersion at a speed of 1500 rpm. After dispersion is completed, a grinding machine is used at a speed of 1000 rpm to prepare a pasty flame-retardant whitening slurry.

[0058] The 100 parts of polyvinyl chloride resin powder, 40 parts of diisononyl phthalate, the pasty flame-retardant whitening slurry prepared in the previous step, 16 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer are mixed and added to a stirrer for stirring. The stirring speed of the stirrer is 2000 rpm. When the temperature of the slurry rises to 45°C, stirring is stopped.

[0059] The 6 parts of resorcinol bis(diphenyl phosphate), 2 parts of methylphenyl diphenyl phosphate, and 2 parts of diphenyl isooctyl phosphate are added, and the stirring speed of the stirrer is 1000 rpm. The beating-up time is 2 minutes.

[0060] The 5 parts of D80 viscosity reducer are used to adjust the viscosity of the slurry to meet the requirements of the machine.

[0061] Before the machine is started, 6 parts of glue are added to the slurry. A doctor blade coating device is used to uniformly coat the slurry on both sides of the PET mesh fabric. The coating machine speed is 15 m / min for coating. The pick-up amount is controlled to make the product grammage reach 700 g / m 2 The oven is heated at 190°C±10°C for gelation reaction. Then, the product is wound up to obtain the required coated fabric.

[0062] Example 4: A heat-insulating coated fabric that passes the NFPA 701-2 flame-retardant standard

[0063] The raw materials used for the coating slurry are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin, 50 parts of diisononyl phthalate, 6 parts of tricresyl phosphate, 2 parts of cresyldiphenyl phosphate, 2 parts of diphenyl isooctyl phosphate, 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 16 parts of 3000 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrylbiphenyl disulfonate, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0064] The coating fabric preparation method comprises the following steps:

[0065] The 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, and 1 part of sodium distyrylbiphenyl disulfonate are dispersed in 10 parts of diisononyl phthalate, and a stirrer is used for dispersion at a speed of 1500 rpm. After dispersion is completed, a grinding machine is used at a speed of 1000 rpm to prepare a pasty flame-retardant whitening slurry.

[0066] The 100 parts of polyvinyl chloride resin powder, 40 parts of diisononyl phthalate, the pasty flame-retardant whitening slurry prepared in the previous step, 16 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer are mixed and added to a stirrer for stirring. The stirring speed of the stirrer is 2000 rpm. When the temperature of the slurry rises to 45°C, stirring is stopped.

[0067] The 6 parts of tricresyl phosphate, 2 parts of cresyldiphenyl phosphate, and 2 parts of diphenyl isooctyl phosphate are added, and the stirring speed of the stirrer is 1000 rpm. The beating-up time is 2 min.

[0068] The 5 parts of D80 viscosity reducer are used to adjust the viscosity of the slurry to meet the requirements of the machine.

[0069] Before the machine is used, 6 parts of glue are added to the slurry. A blade coating device is used to uniformly coat the slurry on both sides of the PET mesh fabric. The coating machine speed is 15 m / min for coating. The pick-up amount is controlled to make the product grammage reach 700 g / m 2 The oven is heated at 190°C±10°C for gelation reaction. Then, the product is wound up to obtain a heat-insulating coated fabric that passes the NFPA 701-2 flame-retardant standard.

[0070] Example 5: A heat-insulating coated fabric that passes the NFPA 701-2 flame-retardant standard

[0071] The raw materials used in the coating slurry are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin powder, 45 parts of diisononyl phthalate, 9 parts of tricresyl phosphate, 3 parts of cresyldiphenyl phosphate, 3 parts of diphenyl isooctyl phosphate, 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 16 parts of 3000 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrylbiphenyl disulfonate, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0072] The specific preparation method of the coated fabric includes the following steps:

[0073] Disperse 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, and 1 part of sodium distyrylbiphenyl disulfonate in 10 parts of diisononyl phthalate, and use a stirrer to disperse at a speed of 1500 rpm. After dispersion is completed, use a grinder at a speed of 1000 rpm to prepare the paste-like flame-retardant whitening paste.

[0074] Mix 100 parts of polyvinyl chloride resin powder, 35 parts of diisononyl phthalate, the paste-like flame-retardant whitening paste prepared in the previous step, 16 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer, and add them to a stirrer to stir. The stirring speed of the stirrer is 2000 rpm. When the temperature of the slurry rises to 45°C, stop stirring.

[0075] Add 9 parts of tricresyl phosphate, 3 parts of cresyldiphenyl phosphate, and 3 parts of diphenyl isooctyl phosphate. The stirring speed of the stirrer is 1000 rpm, and the beating-up time is 2 min.

[0076] Use 5 parts of D80 viscosity reducer to adjust the viscosity of the slurry to meet the requirements of the machine.

[0077] Before the machine, add 6 parts of glue to the slurry. Use a blade coating device to uniformly coat the slurry on both sides of the PET mesh fabric. The coating machine speed is 15 m / min. Control the amount of sizing to make the product gram weight reach 700 g / m 2 , and heat in an oven at 190°C±10°C to perform a gelation reaction. Then, wind up to obtain the required coated fabric.

[0078] Performance test of coated fabric in Example 6

[0079] In the study of the coating slurry of the coated fabric, the following comparative examples are prepared, and performance comparison is made.

[0080] Comparative Example 1

[0081] The raw materials used in the coating slurry are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin powder, 60 parts of diisononyl phthalate, 10 parts of 12500 mesh antimony trioxide, 5 parts of 5000 mesh zinc borate, 20 parts of 800 mesh magnesium hydroxide, 30 parts of 800 mesh calcium carbonate, 1 part of 4,4'-bis(2-methoxystyryl) biphenyl, 1 part of sodium diphenylstyrene biphenyl disulfonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 15 parts of D80 viscosity reducer, and 6 parts of glue.

[0082] The coating fabric preparation method comprises the following steps:

[0083] The 10 parts of diisononyl phthalate are dispersed with 10 parts of 12500 mesh antimony trioxide, 5 parts of 5000 mesh zinc borate, 1 part of 4,4'-bis(2-methoxystyryl) biphenyl, and 1 part of sodium diphenylstyrene biphenyl disulfonate, and a stirrer is used for dispersion at a speed of 1500 rpm, and after dispersion is completed, a grinding machine is used at a speed of 1000 rpm to prepare a paste-like flame-retardant whitening slurry.

[0084] The 100 parts of polyvinyl chloride resin powder, 50 parts of diisononyl phthalate, the paste-like flame-retardant whitening slurry prepared in the previous step, 20 parts of 800 mesh magnesium hydroxide, 30 parts of 800 mesh calcium carbonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 10 parts of D80 viscosity reducer are mixed and added to a stirrer for stirring, the stirring speed of the stirrer is 2000 rpm, and when the slurry temperature rises to 45°C, the stirring is stopped.

[0085] The slurry viscosity is adjusted to meet the requirements of the machine using 5 parts of D80 viscosity reducer.

[0086] Before the machine, 6 parts of glue are added to the slurry, and a doctor blade coating device is used to uniformly coat the slurry on both sides of the PET mesh fabric, the coating machine speed is 15 m / min, and the coating amount is controlled to make the product gram weight reach 700 g / m 2 , the oven is heated at 190°C±10°C, the gelation reaction is carried out, and then the product is wound to obtain the coated fabric.

[0087] Comparative Example 2

[0088] The raw materials used in the coating slurry are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin powder, 60 parts of diisononyl phthalate, 10 parts of 12500 mesh antimony trioxide, 5 parts of 5000 mesh zinc borate, 20 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 1 part of 4,4'-bis(2-methoxystyryl) biphenyl, 1 part of sodium diphenylstyrene biphenyl disulfonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 20 parts of D80 viscosity reducer.

[0089] The specific preparation method comprises the following steps:

[0090] Disperse 12500 mesh antimony trioxide 10 parts, 5000 mesh zinc borate 5 parts, 4,4'-bis(2-methoxystyryl)biphenyl 1 part, sodium distyrylbiphenyl disulfonate 1 part in 10 parts of diisononyl phthalate, disperse using a stirrer at a speed of 1500 rpm, and after dispersion is complete, use a grinding machine at a speed of 1000 rpm to prepare a paste-like flame-retardant whitening paste.

[0091] Mix 100 parts of polyvinyl chloride resin powder, 50 parts of diisononyl phthalate, the paste-like flame-retardant whitening paste prepared in the previous step, 20 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 15 parts of D80 viscosity reducer, and stir in a stirrer at a speed of 2000 rpm, and when the temperature of the paste rises to 45°C, stop stirring.

[0092] Adjust the viscosity of the paste using 5 parts of D80 viscosity reducer, and it is not possible to adjust to the required viscosity range for the coating machine (continuing to add more D80 results in excessive smoke, which does not meet environmental protection requirements). Therefore, the comparative example cannot be prepared into coated fabric.

[0093] Comparative Example 3

[0094] The raw materials used for the coating paste are as follows in parts by weight: 100 parts of polyvinyl chloride paste resin powder, 60 parts of diisononyl phthalate, 8 parts of 12500 mesh antimony trioxide, 4 parts of 5000 mesh zinc borate, 16 parts of 3000 mesh magnesium hydroxide, 1 part of 4,4'-bis(2-methoxystyryl)biphenyl, 1 part of sodium distyrylbiphenyl disulfonate, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, 20 parts of D80 viscosity reducer, and 6 parts of glue.

[0095] The specific preparation method of the coated fabric includes the following steps:

[0096] Disperse 12500 mesh antimony trioxide 8 parts, 5000 mesh zinc borate 4 parts, 4,4'-bis(2-methoxystyryl)biphenyl 1 part, sodium distyrylbiphenyl disulfonate 1 part in 10 parts of diisononyl phthalate, disperse using a stirrer at a speed of 1500 rpm, and after dispersion is complete, use a grinding machine at a speed of 1000 rpm to prepare a paste-like flame-retardant whitening paste.

[0097] Mix 100 parts of polyvinyl chloride resin powder, 50 parts of diisononyl phthalate, the paste-like flame-retardant whitening paste prepared in the previous step, 16 parts of 3000 mesh magnesium hydroxide, 30 parts of 3000 mesh calcium carbonate, 2 parts of barium-zinc stabilizer, 10 parts of titanium white, 10 parts of wollastonite, 5 parts of talc, and 15 parts of D80 viscosity reducer, and stir in a stirrer at a speed of 2000 rpm, and when the temperature of the paste rises to 45°C, stop stirring.

[0098] Using D80 viscosity reducer 5 parts, adjust the slurry viscosity to meet the requirements of the machine.

[0099] Before the machine, add 6 parts of glue to the slurry, use a scraper coating device, evenly scrape the slurry on both sides of the PET net, the coating machine speed is scraped at a speed of 15 m / min, control the sizing amount to make the product gram weight reach 700 g / m 2 , oven 190℃±10℃ heating, gelation reaction, then winding, to make the coated fabric.

[0100] In summary, compared with example 1, the main difference of example 2 is that the amount of antimony trioxide (8 parts), zinc borate (4 parts) and magnesium hydroxide (16 parts) is different. Compared with example 2, the main difference of example 3 is that the particle size of magnesium hydroxide and calcium carbonate is changed to 3000 mesh. Compared with example 3, the main difference of example 4 is that triphenyl phosphate is used instead of resorcinol bis(diphenyl phosphate). Compared with example 4, the main difference of example 5 is that the amount of triphenyl phosphate (9 parts), diphenyl isooctyl phosphate (3 parts) and methylphenyl diphenyl phosphate (3 parts) is different.

[0101] Compared with example 1, the main difference of comparative example 1 is that the amount of plasticizer diisononyl phthalate is increased to 60 parts, the particle size of magnesium hydroxide and calcium carbonate is changed to 800 mesh, and no flame retardant plasticizer is used; the main difference of comparative example 2 is that the amount of plasticizer diisononyl phthalate is increased to 60 parts, and no flame retardant plasticizer is used; the main difference of comparative example 3 is that the amount of plasticizer diisononyl phthalate is increased to 60 parts, no flame retardant plasticizer is used, and the amount of viscosity reducer is increased to 20 parts.

[0102] The amount of D80 viscosity reducer used in the slurry prepared in the examples and comparative examples (coating slurry obtained before the machine) and the viscosity (rotational viscometer test method) data were statistically analyzed, and the test results are shown in Table 1.

[0103] Table 1 viscosity of slurry after beating

[0104]

[0105]

[0106] The viscosity test results after beating by Table 1 can be seen: the pulp viscosity prepared by the examples of the application is lower than that of the comparative examples. The pulp viscosity has a decisive influence on whether it can be successfully produced. If the pulp viscosity is low, the pick-up cannot reach the target gram weight; if the pulp viscosity is high, it cannot be produced. The pulp viscosity of Example 1 is lower than that of Comparative Example 1; the pulp viscosity of Examples 2 to 5 is lower than that of Comparative Example 3, and the pulp viscosity of Examples 1-5 is lower than that of Comparative Examples 1 and 3. It shows that the preferred flame-retardant plasticizer, the specific particle size of the powder flame retardant and its amount all make indispensable contributions to the viscosity reduction.

[0107] The coated fabrics prepared by the examples and comparative examples were tested by high-frequency welding (current 1A) and hot-air welding (welding temperature 300℃, speed 6m / min), and the test results are shown in Table 2.

[0108] Table 2 Test data of the welding performance of the coated fabrics of the examples and comparative examples

[0109]

[0110] As can be seen from the welding performance test results in Table 2: the peeling data of the coated fabrics prepared by Example 1, Example 2, Example 3, Example 4 and Example 5 after welding are much higher than that of Comparative Example 1. Under the same welding conditions, the high-frequency welding and hot-air welding peeling strength of Example 1, Example 2, Example 3, Example 4 and Example 5 are all greater than 90N / m, which fully meets the large-scale construction requirements of the coated fabric. Although the peeling strength of the coated fabric of Comparative Example 3 after welding is also good, it is difficult to produce (see Table 1) and the flame retardancy does not meet the requirements (see Table 3).

[0111] The coated fabrics prepared by the examples and comparative examples were tested for flame retardance according to the NFPA 701-2 standard, and the test results are shown in Table 3.

[0112] Table 3 Test data of the flame retardance of the coated fabrics of the examples and comparative examples according to the NFPA 701-2 standard

[0113]

[0114] From the test results of Table 3, it can be seen that the flame-retardant coated fabrics prepared in the examples of the present application all meet the NFPA 701-2 flame-retardant standard. The flame-retardant properties of Examples 1, 2, 3, 4 and 5 are all better than those of Comparative Examples 1 and 3. Under the same flame-retardant test conditions, Examples 1, 2, 3, 4 and 5 meet the requirements of the product for flame-retardant properties. Although the flame-retardant properties of the coated fabric of Comparative Example 1 also meet the NFPA 701-2 flame-retardant standard, the viscosity of the sizing is relatively high (see Table 1), and the peel strength after welding does not meet the requirements (see Table 2). This shows that the preferred flame-retardant plasticizer, the specific particle size of the powder flame-retardant agent and the amount thereof all make an indispensable contribution to viscosity reduction.

[0115] The coated fabrics prepared in the examples and comparative examples were subjected to product reflectivity testing (ISO 9050:2003) using a Shimadzu UV3600. The test results are shown in Table 4.

[0116] Table 4 Reflectivity data of the coated fabrics of the examples and comparative examples

[0117]

[0118]

[0119] From the reflectivity test results of the coated fabrics measured in Table 4, it can be seen that the reflectivity of the coated fabrics prepared in the examples of the present application is all higher than that of Comparative Examples 1 and 3. Examples 1, 2, 3, 4 and 5 all meet the requirements of the product for reflectivity. Although the reflectivity of the coated fabric of Comparative Example 3 also exceeds 87%, there is a problem that the flame-retardant properties cannot meet the NFPA 701-2 flame-retardant standard.

[0120] The reflectivity value directly reflects the ability of the surface of the coated fabric product to reflect solar radiation energy. The higher the reflectivity, the stronger the ability of the surface to reflect the incident sunlight back to the outside space; on the contrary, the lower the reflectivity, the greater the proportion of solar radiation energy absorbed by the surface of the object. It can be seen that the preferred flame-retardant plasticizer and the smaller particle size of the flame-retardant agent make the sizing have lower viscosity and better flatness, and the flame-retardant, heat-insulating coated fabric prepared has high reflectivity properties, which can effectively reduce the heat accumulation due to absorption of solar radiation, and has significant technical effects and application value for achieving heat insulation and reducing energy consumption.

[0121] In summary, the inventors found that the flame-retardant plasticizer, the powder particle size and the amount of both have complex effects on the viscosity (difficulty of production), the peel strength (use stability), the reflectivity (heat insulation), and the flame retardancy (safety) of the coated fabric, which makes it extremely difficult to obtain a coated fabric that meets all the above requirements. The coated fabrics prepared in Examples 1-5 of the present application, however, well balance the above properties, meet the requirements of high-rise building roof insulation and flame retardancy, and are easy to produce and have high peel strength.

[0122] The above merely describes the preferred embodiments of the present application, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the present application, and these improvements and refinements also fall within the protection scope of the present application.

Claims

1. A high flame resistant, easily scuffable, high weld strength, thermal barrier coated fabric, characterized in that, The coating cloth meets the NFPA701-2 flame retardant standard, the reflectivity is not less than 87%, the high-frequency welding peeling strength is not less than 110 N / m, and the hot air welding peeling strength is not less than 105 N / m; the coating cloth is made of a base cloth and a coating slurry scraped on both sides of the base cloth; the coating slurry is made of the following raw materials in parts by weight: Polyvinyl chloride resin powder 80~110 parts, plasticizer 45~55 parts, flame-retardant plasticizer 5~20 parts, powder flame retardant 10~40 parts, whitening agent 1~3 parts, stabilizer 1~5 parts, other functional fillers 40~60 parts, viscosity reducer 10~30 parts, glue 5~8 parts; The other functional fillers are selected from at least three of titanium white powder, 1250-mesh calcium powder, 3000-mesh calcium powder, talc powder, wollastonite, and kaolin; The plasticizer is diisononyl phthalate; the flame-retardant plasticizer is a combination of methylphenyl diphenyl phosphate, resorcinol bis(diphenyl phosphate), and diphenyl isooctyl phosphate, or a combination of methylphenyl diphenyl phosphate, triphenyl phosphate, and diphenyl isooctyl phosphate; the powder flame retardant is a combination of 12500-mesh antimony trioxide, 5000-mesh zinc borate, and 1250-mesh magnesium hydroxide or 3000-mesh magnesium hydroxide.

2. A high flame resistant, easily scuffable, high weld strength, thermal barrier coated fabric according to claim 1, characterized in that, The coating slurry is made of the following raw materials in parts by weight: polyvinyl chloride resin powder 90~110 parts, plasticizer 45~50 parts, flame-retardant plasticizer 8~15 parts, powder flame retardant 28~35 parts, whitening agent 1~3 parts, stabilizer 1~3 parts, other functional fillers 50~60 parts, viscosity reducer 10~30 parts, and glue 5~8 parts.

3. A high flame resistant, easily scuffable, high weld strength, thermal barrier coated fabric according to claim 1, wherein, The polyvinyl chloride resin powder is a polyvinyl chloride paste resin powder.

4. A high flame resistant, easily scuffable, high weld strength, thermal barrier coated fabric according to claim 1, wherein, The plasticizer is selected from at least one of diisononyl phthalate, diisodecyl phthalate, di(2-ethylhexyl) adipate, diisooctyl phthalate, and dipropyl heptyl phthalate.

5. A high flame resistant, easily scuffable, high weld strength, thermal insulation coated fabric according to claim 1, wherein, The whitening agent is selected from at least two of 4,4'-bis(2-methoxystyryl) biphenyl, sodium diphenylstyrene biphenyl disulfonate, 2,5-bis(5-tert-butyl-2-benzoxazolyl) thiophene, and bis-triazine aminostilbene.

6. A high flame resistant, easily scuffable, high weld strength, thermal insulation coated fabric according to claim 1, wherein, The viscosity reducer is selected from at least one of D60 viscosity reducer, D75 viscosity reducer, D70 viscosity reducer, and D80 viscosity reducer.

7. A high flame resistant, easily scuffable, high weld strength, thermal insulation coated fabric according to claim 1, wherein, The flame-retardant plasticizer is a combination of methylphenyl diphenyl phosphate, resorcinol bis(diphenyl phosphate), and diphenyl isooctyl phosphate, and the weight ratio of the methylphenyl diphenyl phosphate, resorcinol bis(diphenyl phosphate), and diphenyl isooctyl phosphate is 1:3:

1.

8. A high flame resistant, easily scuffable, high weld strength, thermal insulation coated fabric according to claim 1, wherein, The flame-retardant plasticizer is a combination of methylphenyl diphenyl phosphate, triphenyl phosphate, and diphenyl isooctyl phosphate, and the weight ratio of the methylphenyl diphenyl phosphate, triphenyl phosphate, and diphenyl isooctyl phosphate is 1:3:

1.

9. A process for the production of a high flame resistant, easily scuffable, high seam strength, thermal barrier coated fabric as claimed in claim 1, characterized in that, The preparation method comprises the following steps: Step S1: take the materials in parts by weight, disperse antimony trioxide, zinc borate, and a whitening agent in a plasticizer, mix uniformly using a stirrer, and make a paste-like flame-retardant whitening slurry using a grinding machine; the amount of the plasticizer is 1 / 7~1 / 3 of the total mass of the plasticizer in the coating slurry; Step S2: take the material by weight, mix the paste-like flame-retardant whitening paste obtained in step S1 with polyvinyl chloride resin powder, stabilizer, the rest of the plasticizer, magnesium hydroxide and other functional fillers, add it to the stirrer and stir, control the temperature of the slurry during the process, prepare the preliminary slurry; the amount of viscosity reducer is 1 / 2~4 / 5 of the total mass of viscosity reducer in the coating slurry; Step S3: take the material by weight, add the flame-retardant plasticizer to the preliminary slurry obtained in step S2, mix it evenly using a stirrer, and obtain the intermediate slurry; Step S4: adjust the viscosity of the intermediate slurry prepared in step S3 using the rest of the viscosity reducer, reach the requirements for the machine, add glue to obtain the coating slurry for the machine; Step S5: use a squeegee to evenly squeegee the coating slurry obtained in step S4 onto the base cloth, use a drying device to perform a gelation reaction, and wind it up.

10. The preparation method of the high flame-retardant easy-to-squeegee high-welding-strength heat-insulating coated fabric according to claim 9, characterized in that: the stirring speed of the stirrer in step S1 is 1000~4000 rpm; the grinding speed of the grinder in step S1 is 800~1200 rpm; the stirring speed of the stirrer in step S2 is 1000~4000 rpm, and the stirring is stopped when the measured temperature reaches 40~50℃; the stirring speed of the stirrer in step S3 is 800~2000 rpm, and the stirring is stopped after 1~6 min; the squeegee speed in step S5 is 10~20 m / min, and the drying device is an oven with a temperature of 160~210℃.

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