Preparation method of low-odor high-flame-retardant material and preparation method of low-odor high-flame-retardant fabric

Abstract

The present invention discloses a method for preparing a low-odor high-flame-retardant material and a method for preparing a low-odor high-flame-retardant cloth, the preparation method comprising: weighing an appropriate amount of substances required for preparing the low-odor high-flame-retardant material and placing them in a container, the substances comprising: polyvinyl chloride resin, plasticizer, liquid flame retardant, powder flame retardant, adhesive and diluent; the liquid flame retardant comprises a phosphorus-based flame retardant; stirring the slurry in the container at a first stirring speed, and monitoring the slurry temperature during the stirring and mixing process; stopping stirring after the slurry temperature reaches the set temperature, and setting the slurry to stand for a first time; adding the phosphorus-based flame retardant again, stirring at a second stirring speed for a second time, and obtaining a low-odor high-flame-retardant material; the first stirring speed is greater than the second stirring speed. The flame-retardant slurry prepared by the method of the present invention has a stable viscosity, and the prepared cloth has no obvious odor under normal temperature use.

Description

Technical Field

[0001] The invention belongs to the technical field of fabric components, and relates to a fabric component, and in particular to a method for preparing a low-odor and highly flame-retardant material and a method for preparing a low-odor and highly flame-retardant fabric. Background Art

[0002] Seat support fabrics are an essential component of rail transit vehicles and aircraft, especially in the aircraft field. They not only provide passengers with the most basic riding comfort experience, but also have the most direct impact on the safety of passengers on the aircraft. The support fabrics used in aviation seats have high requirements for flame retardant properties. Highly flame-retardant aviation seat support fabrics can effectively slow down the spread of fire after a fire breaks out in the aircraft, giving passengers more time to escape. In addition, lightweight aircraft can increase flight speed, reduce fuel costs, and reduce carbon emissions. In order to achieve the goal of lightweight aircraft, it has become a trend to use high-performance fabrics to replace the steel frame structure of seats.

[0003] The Chinese patent with publication number CN104828249A discloses a lightweight seat cushion for an aviation seat, which is arranged on the seat board or backrest board of the aviation seat, including a seat cushion inner core and a fireproof fabric arranged on its outer layer. The outer layer of fireproof fabric is woven from high temperature resistant intrinsic flame retardant fibers, and the fabric weight is 270g / m 2 -350 g / m 2 The inner core is woven from high temperature resistant intrinsic flame retardant fibers and flame retardant chemical fibers formed by adding flame retardants during the spinning process.

[0004] Although the above methods can provide flame retardant properties, the manufacturing process is complicated, the cost of high temperature resistant intrinsic flame retardant fibers is high, and the flame retardant fabrics prepared by the above methods have a large gram weight, which increases the weight of the aircraft and does not conform to the development trend of lightweight aircraft. In addition, the fabrics made by the existing methods usually have obvious odors, resulting in a poor user experience.

[0005] In view of this, there is an urgent need to design a new fabric to overcome at least some of the above-mentioned defects of existing aircraft fabrics. Summary of the invention

[0006] The present invention provides a method for preparing a low-odor high-flame-retardant material and a method for preparing a low-odor high-flame-retardant cloth. The prepared high-flame-retardant material has a stable system and stable viscosity, and the prepared cloth has no obvious odor under normal temperature use environment.

[0007] To solve the above technical problem, according to one aspect of the present invention, the following technical solution is adopted:

[0008] A method for preparing a low-odor and highly flame-retardant material, the preparation method comprising:

[0009] Step S1, weighing an appropriate amount of substances required for preparing a low-odor and high-flame-retardant material, the substances comprising: polyvinyl chloride resin, plasticizer, liquid flame retardant, powder flame retardant, adhesive and diluent; the liquid flame retardant comprises a phosphorus-based flame retardant; adding the weighed substances required for preparing the low-odor and high-flame-retardant material into a container;

[0010] Step S2, stirring the slurry in the container at a first stirring speed, and monitoring the slurry temperature during the stirring and mixing process; stopping the stirring after the slurry temperature reaches a set temperature, and leaving the slurry to stand for a set first time;

[0011] Step S3, adding the phosphorus-based flame retardant again, stirring at a second stirring speed for a second time, to obtain a low-odor and highly flame-retardant material; the first stirring speed is greater than the second stirring speed.

[0012] As an embodiment of the present invention, in step S1, the substances required for preparing the low-odor and high-flame-retardant material are weighed, including: 100 parts of polyvinyl chloride resin, 10-40 parts of plasticizer, 25-55 parts of liquid flame retardant, 5-50 parts of powder flame retardant, 1-10 parts of adhesive, and 10-30 parts of diluent; the above parts are measured in parts by weight.

[0013] As an embodiment of the present invention, in the step S1, the amount of phosphorus-based flame retardant in the liquid flame retardant is 20-30 parts.

[0014] As an embodiment of the present invention, the preparation method further comprises step S4: adding 5-20 parts of a diluent to obtain a low-odor and highly flame-retardant material.

[0015] As an embodiment of the present invention, in step S2, in order to ensure the stability of the viscosity of the highly flame-retardant material, the slurry is stirred at a speed of 800-2500 rpm; after the slurry temperature reaches 25-45°C, the stirring is stopped and the slurry is allowed to stand for 2-48 hours.

[0016] As an embodiment of the present invention, in the step S3, 5-25 parts of phosphorus-based flame retardant are added again, and stirred at a rotation speed of 200-1500 rpm for 5-40 minutes to obtain a low-odor and highly flame-retardant material.

[0017] As an embodiment of the present invention, in step S2, the slurry is stirred at a speed of 1000-1500 rpm; the stirring is stopped after the slurry temperature reaches 30-40° C., and the slurry is allowed to stand for 4-24 hours;

[0018] In the step S3, 5-25 parts of phosphorus flame retardant are added again, and the mixture is stirred at a rotation speed of 500-800 rpm for 15-30 minutes to obtain a low-odor and highly flame-retardant material.

[0019] According to another aspect of the present invention, the following technical solution is adopted: a method for preparing a low-odor and highly flame-retardant fabric, the preparation method comprising:

[0020] Step 1: preparing a low-odor and high-flame-retardant material using the above-mentioned method for preparing a low-odor and high-flame-retardant material;

[0021] Step 3, spraying the prepared flame retardant slurry onto the base fabric layer, and making the base fabric layer completely immersed in the slurry;

[0022] Step 5: remove excess flame retardant slurry by rolling, place the rolled fabric in a baking device, and dry to obtain low-odor and highly flame retardant fabric.

[0023] As an embodiment of the present invention, the method further includes step 2 between step 1 and step 3: the viscosity of the slurry after mixing is often large, and after the phosphorus-based flame retardant is added, in order to reduce the swelling effect of the phosphorus-based flame retardant on the PVC particles, an appropriate amount of diluent is added to make the slurry viscosity 180-320mPa.S. The slurry-sized fabric in this range has both low gram weight and excellent flame retardant properties.

[0024] As an embodiment of the present invention, step 5 specifically includes: rolling off excess flame retardant slurry, controlling the rolling rate to 65-105%, placing the impregnated fabric in a baking device, controlling the travel speed of the fabric in the baking device to 3-20 m / min, the baking device temperature to 100-200°C, and drying to obtain low-odor and highly flame-retardant fabric.

[0025] The beneficial effects of the present invention are as follows: the preparation method of the low-odor high-flame-retardant material and the preparation method of the low-odor high-flame-retardant fabric proposed in the present invention have a stable high-flame-retardant material system and stable viscosity, and the prepared fabric has no obvious odor under normal temperature use environment.

[0026] The invention imparts flame retardant properties to the base fabric by post-finishing. Compared with blending and copolymerization, the post-finishing method is simple and convenient, with wide applicability, and the mechanical properties of the base fabric can be well maintained.

[0027] The flame retardant used in the present invention has an excellent synergistic flame retardant effect, and can give the base fabric excellent flame retardant properties at a lower sizing amount. Compared with the prior art, the present invention can achieve no after-flaming, no molten dripping during combustion, and a damage length of less than 100 mm, which is significantly better than the flame retardant standard requirements for aircraft seat decoration fabrics specified in Appendix F of CCAR 25 (after-flaming time ≤15s, dripping burning time ≤5s, burning length ≤203mm).

[0028] The invention prepares odor-free and highly flame-retardant fabric at room temperature by selecting an auxiliary agent with good compatibility with a plasticizer and low odor and by controlling the traveling speed of the sizing fabric in an oven.

[0029] The present invention successfully solves the swelling phenomenon of PVC particles in a high flame retardant slurry system after quickly absorbing liquid flame retardant through a special raw material processing technology, and solves the problem of rapid viscosity increase of the slurry system in a short time.

[0030] The invention uses low-cost, easy-to-process and flame-retardant polyvinyl chloride paste resin slurry to finish the base fabric, thereby obtaining a high flame-retardant seat support fabric with low cost, small gram weight and excellent flame-retardant performance.

[0031] Polyvinyl chloride (PVC) slurry is a special suspension system in which paste resin particles are dispersed in plasticizers and other additives. Under normal temperature conditions, plasticizers are poor solvents for paste resin particles. The surface of particles adsorbs plasticizers and other additives to form a plasticizer and other additive layer of a certain thickness. The particles absorb plasticizers and other additives, causing the particles to swell and become larger, and the large secondary particles to disintegrate. As a result, the concentration of the continuous phase in the suspension system changes over time, and the viscosity of the system changes continuously.

[0032] In addition, the changes between the plasticizer PVC molecules during the aging process at room temperature and the high-temperature plasticization process of the PVC slurry are physical changes. The interaction between the PVC molecules and the plasticizer in the rubber elastic products is relatively weak, and there are also compatibility issues between the plasticizer and other additives. If the plasticizer in the PVC product migrates to the surface, the PVC slurry cannot be firmly fixed on the surface of other items, causing it to fall off and affecting its performance.

[0033] Therefore, when preparing PVC slurry, it is necessary to select a suitable combination of plasticizers and other additives to make the prepared PVC slurry a relatively stable suspension system. In addition, during the coating process, the viscosity of the PVC slurry is required to be low, and the viscosity of the slurry changes little within a certain period of time, so as to maintain the low thickness and thickness uniformity of the PVC slurry coating products.

[0034] The PVC slurry system proposed by the present invention has a slurry viscosity that fluctuates slightly within a certain aging time after the additives are mixed together, so as to be suitable for actual industrial production; the additives have good compatibility after being mixed together, so as to achieve the purpose of not affecting the performance of subsequent PVC slurry sizing products; the fabric prepared by the sizing system has a low gram weight, which conforms to the lightweight development trend, but has excellent flame retardant performance and no obvious odor, thereby ensuring flame retardant safety and providing users with a better use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of the surface of the base fabric in one embodiment of the present invention.

[0036] Figure 2Schematic diagram of the surface of the base fabric after padding treatment in one embodiment of the present invention.

[0037] Figure 3 Schematic diagram of a fabric processing process in one embodiment of the present invention.

[0038] Figure 4 Schematic diagram of the swelling process of PVC paste resin.

[0039] Figure 5 The present invention is a flowchart of a method for preparing a low-odor and highly flame-retardant material in one embodiment of the present invention.

[0040] Figure 6 The present invention is a flowchart of a method for preparing a low-odor and highly flame-retardant material in one embodiment of the present invention.

[0041] Figure 7 The present invention is a flowchart of a method for preparing a low-odor and highly flame-retardant fabric in accordance with an embodiment of the present invention.

[0042] Figure 8 The present invention is a flowchart of a method for preparing a low-odor and highly flame-retardant fabric in accordance with an embodiment of the present invention. DETAILED DESCRIPTION

[0043] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0044] In order to further understand the present invention, preferred embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the claims of the present invention.

[0045] The description in this section is only for several typical embodiments, and the present invention is not limited to the scope of the embodiments. The same or similar prior art means and some technical features in the embodiments are mutually replaced within the scope of the present invention.

[0046] The description of the steps in each embodiment in the specification is only for the convenience of explanation, and the implementation method of the present application is not limited by the order of implementation of the steps.

[0047] The present invention discloses a method for preparing a low-odor and highly flame-retardant material. Figure 5 This is a flow chart of a method for preparing a low-odor, high-flame-retardant material in one embodiment of the present invention; please refer to Figure 5 , the preparation method comprises:

[0048] [Step S1] Weighing an appropriate amount of substances required for preparing a low-odor and high-flame-retardant material, the substances comprising: polyvinyl chloride resin, a plasticizer, a liquid flame retardant, a powder flame retardant, an adhesive and a diluent; the liquid flame retardant comprises a phosphorus-based flame retardant; adding the weighed substances required for preparing the low-odor and high-flame-retardant material into a container;

[0049] [Step S2] Stirring the slurry in the container at a first stirring speed, and monitoring the slurry temperature during the stirring and mixing process; stopping stirring after the slurry temperature reaches a set temperature (such as a set temperature between 25-45° C., such as a temperature between 30-40° C.), and leaving the slurry to stand for a set first time;

[0050] [Step S3] Add the phosphorus-based flame retardant again, stir at a second stirring speed for a second time to obtain a low-odor and highly flame-retardant material; the first stirring speed is greater than the second stirring speed.

[0051] In one embodiment of the present invention, in step S1, the substances required for preparing the low-odor and high-flame-retardant material include: 100 parts of polyvinyl chloride resin, 10-40 parts of plasticizer, 25-55 parts of liquid flame retardant, 5-50 parts of powder flame retardant, 1-10 parts of adhesive, and 10-30 parts of diluent; the above parts are in parts by weight. Among the liquid flame retardant, the part of phosphorus-based flame retardant is 20-30 parts.

[0052] The plasticizer may include at least one of di(2-ethylhexyl) adipate DOA, dioctyl terephthalate DOTP, diisooctyl phthalate DOP, diisononyl phthalate DINP, epoxidized soybean oil, and pentaerythritol tetravalerate Pevalen.

[0053] The liquid flame retardant may include a phosphorus-based flame retardant and a bromine-based flame retardant; the phosphorus-based liquid flame retardant includes at least one of toluene diphenyl phosphate, ditoluene phenyl phosphate, trioctyl phosphate, triisooctyl phosphate, and tri(2-ethylhexyl) phosphate; the bromine-based liquid flame retardant includes at least one of tetrabromophthalic acid bis(2-ethylhexyl) ester, tetrabromophthalic anhydride dimethyl ester, tetrabromophthalic anhydride dihexyl ester, tetrabromophthalic anhydride diheptyl ester, or tetrabromophthalic anhydride didecyl ester. .

[0054] The powder flame retardant may include at least one of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc compounds and inorganic minerals; the zinc compound includes at least one of zinc borate, zinc aluminate and zinc stannate; the inorganic mineral includes at least one of sodium montmorillonite, calcium montmorillonite, wollastonite, vermiculite, kaolinite and halloysite.

[0055] The adhesive may be at least one of 1,3-diisocyanatotoluene, 2,4-diisocyanatotoluene, and aromatic polyisocyanurate; and the diluent may include at least one of environmentally friendly dearomatized solvent oil and isoparaffin solvent oil.

[0056] Figure 6 This is a flow chart of a method for preparing a low-odor, high-flame-retardant material in one embodiment of the present invention; please refer to Figure 6In one embodiment of the present invention, the preparation method may further include step S4: adding 5-20 parts of a diluent to obtain a low-odor and highly flame-retardant material.

[0057] In one embodiment of the present invention, in step S2, in order to ensure the stability of the viscosity of the highly flame retardant material, the slurry is stirred at a speed of 800-2500rpm (such as 1000-1500rpm, specifically 800, 1000, 1250, 1500, 2000, 2500rpm, etc.); after the slurry temperature reaches 25-45°C (such as 30-40°C, specifically 25°C, 30°C, 35°C, 40°C, 45°C, etc.), stirring is stopped, and the slurry is allowed to stand for 2-48h (such as 4-24h, specifically 2h, 4h, 10, 24h, 48h, etc.).

[0058] In the step S3, 5-25 parts of phosphorus flame retardant are added again, and stirred at a rotation speed of 200-1500rpm (such as 500-800rpm, specifically 200, 500, 800, 1000, 1500rpm, etc.) for 5-40min (such as 15-30min, specifically 5min, 15min, 20min, 30min, 40min, etc.) to obtain a low-odor and highly flame-retardant material.

[0059] The present invention further discloses a method for preparing a low-odor and highly flame-retardant fabric. Figure 3 This is a schematic diagram of a fabric processing process in one embodiment of the present invention. Figure 7 This is a flow chart of a method for preparing a low-odor, high-flame-retardant fabric according to an embodiment of the present invention; please refer to Figure 3 , Figure 7 , the preparation method comprises:

[0060] [Step 1] Using the above-mentioned method for preparing a low-odor and high-flame-retardant material, a low-odor and high-flame-retardant material is prepared;

[0061] [Step 3] Spray the prepared flame retardant slurry onto the base fabric layer, and completely immerse the base fabric layer in the slurry;

[0062] [Step 5] Excess flame retardant slurry is rolled off, and the impregnated fabric is placed in a baking device to dry to obtain a low-odor and highly flame retardant fabric.

[0063] Figure 8 This is a flow chart of a method for preparing a low-odor, high-flame-retardant fabric according to an embodiment of the present invention; please refer to Figure 8In one embodiment of the present invention, the method further comprises step 2 between step 1 and step 3: after mixing, the viscosity of the slurry is often large, and after adding the phosphorus-based flame retardant, in order to reduce the swelling effect of the phosphorus-based flame retardant on the PVC particles, an appropriate amount of diluent is added to make the slurry viscosity 180-320 mPa.S. The slurry-sized fabric in this range has both low gram weight and excellent flame retardant properties.

[0064] In one embodiment of the present invention, step 5 specifically includes: rolling off excess flame retardant slurry, controlling the rolling rate to 65-105%, placing the impregnated fabric in a baking device, controlling the fabric's travel speed in the baking device to 3-20 m / min (such as 5-15 m / min, specifically 3 m / min, 5 m / min, 10 m / min, 15 m / min, 20 m / min, etc.), the baking device temperature is 100-200 ° C, specifically 100 ° C, 150 ° C, 200 ° C, etc.), and drying to obtain a low-odor, highly flame-retardant fabric.

[0065] The comparative examples and examples of the present invention weighed the components according to the weight ratio in Table 1, put them into a bucket and stirred them evenly, dipped the fabric into the mixed slurry, squeezed out the excess slurry, and dried thoroughly. Raw materials: polyester fabric.

[0066]

[0067]

[0068]

[0069] Table 1 Performance test results

[0070] The application performance of the flame retardant slurry was evaluated (the flame retardant performance was in accordance with the flame retardant test standard of CCAR25.853 (a), and the odor test was in accordance with the odor test standard of PV 3900) as shown in Table 2.

[0071]

[0072] Table 2 Performance evaluation table

[0073] like Figure 4As shown, during the placement of the PVC slurry, the PVC particles gradually absorb the liquid flame retardant and swell, the PVC particles become larger, the distance between the particles decreases, the friction force increases, and the macroscopic manifestation is a significant increase in the viscosity of the slurry. However, the dearomatized solvent oil can form a stable protective layer on the surface of the PVC particles, which can significantly reduce the swelling phenomenon caused by the PVC particles absorbing the liquid flame retardant. Therefore, the present invention proposes an addition process for adding the liquid flame retardant twice. When part of the liquid flame retardant is added for the first time, the dearomatized solvent oil added at the same time can form a relatively stable protective layer on the surface of the PVC particles. When the remaining portion of the liquid flame retardant is added separately, the dearomatized solvent oil has formed a relatively stable protective layer on the surface of the PVC particles, and the process of the PVC particles absorbing the liquid flame retardant and swelling is significantly suppressed, so the viscosity of the PVC slurry will change less for a period of time.

[0074] Figure 1 is a schematic diagram of the surface of a base fabric in one embodiment of the present invention, Figure 2 is a schematic diagram of the surface of the base fabric after padding treatment in one embodiment of the present invention; please refer to Figure 1 , Figure 2 ,pass Figure 1 , Figure 2 It can be seen that the slurry prepared by the preparation method of the present invention can be effectively attached to the surface of the cloth.

[0075] In summary, the method for preparing a low-odor and high-flame-retardant material and the method for preparing a low-odor and high-flame-retardant fabric proposed in the present invention have a stable high-flame-retardant material system and a stable viscosity, and the prepared fabric has no obvious odor under normal temperature use environment.

[0076] The invention imparts flame retardant properties to the base fabric by post-finishing. Compared with blending and copolymerization, the finishing method is simple and convenient, with wide applicability, and the mechanical properties of the base fabric can be well maintained.

[0077] The flame retardant used in the present invention has an excellent synergistic flame retardant effect, and can give the base fabric excellent flame retardant properties at a lower sizing amount. Compared with the prior art, the present invention can achieve no afterburning, no molten dripping during combustion, and the damage length is less than 100 mm, which is significantly better than the flame retardant standard requirements for aircraft seat decoration fabrics specified in Appendix F of CCAR25 (afterburning time ≤15s, dripping burning time ≤5s, burning length ≤203mm). In addition, the slurry prepared according to the preparation method of the present invention has a small viscosity change within a certain aging time, and the slurry viscosity stability is high.

[0078] The invention uses low-cost, easy-to-process and flame-retardant polyvinyl chloride paste resin slurry to finish the base fabric, thereby obtaining a high flame-retardant seat support fabric with low cost, small gram weight and excellent flame-retardant performance.

[0079] Polyvinyl chloride (PVC) slurry is a special suspension system in which paste resin particles are dispersed in plasticizers and other additives. Under normal temperature conditions, plasticizers are poor solvents for paste resin particles. The surface of particles adsorbs plasticizers and other additives to form a plasticizer and other additive layer of a certain thickness. The particles absorb plasticizers and other additives, causing the particles to swell and become larger, and the large secondary particles to disintegrate. As a result, the concentration of the continuous phase in the suspension system changes over time, and the viscosity of the system changes continuously.

[0080] In addition, the changes between the plasticizer PVC molecules during the aging process at room temperature and the high-temperature plasticization process of the PVC slurry are physical changes. The interaction between the PVC molecules and the plasticizer in the rubber elastic products is relatively weak, and there are also compatibility issues between the plasticizer and other additives. If the plasticizer in the PVC product migrates to the surface, the PVC slurry cannot be firmly fixed on the surface of other items, causing it to fall off and affecting its performance.

[0081] Therefore, when preparing PVC slurry, it is necessary to select a suitable combination of plasticizers and other additives to make the prepared PVC slurry a relatively stable suspension system. In addition, during the coating process, the viscosity of the PVC slurry is required to be low, and the viscosity of the slurry changes little within a certain period of time, so as to maintain the low thickness and thickness uniformity of the PVC slurry coating products.

[0082] The PVC slurry system proposed by the present invention has a slurry viscosity that fluctuates slightly within a certain aging time after the additives are mixed together, so as to be suitable for actual industrial production; the additives have good compatibility after being mixed together, so as to achieve the purpose of not affecting the performance of subsequent PVC slurry sizing products; the fabric prepared by the sizing system has a low gram weight, which conforms to the lightweight development trend, but has excellent flame retardant performance and no obvious odor, thereby ensuring flame retardant safety and providing users with a better use experience.

[0083] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The description and application of the present invention here are illustrative, and it is not intended to limit the scope of the present invention to the above-mentioned embodiments. The effects or advantages involved in the embodiments may not be embodied in the embodiments due to interference from various factors, and the description of the effects or advantages is not used to limit the embodiments. The deformation and change of the embodiments disclosed here are possible, and the replacement of the embodiments and the various equivalent parts are well known to those of ordinary skill in the art. It should be clear to those skilled in the art that the present invention can be implemented in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential features of the present invention. Other deformations and changes can be made to the embodiments disclosed here without departing from the scope and spirit of the present invention.

Claims

1. A method for preparing a low-odor and highly flame-retardant material, characterized in that: The preparation method comprises: Step S1, weighing an appropriate amount of substances required for preparing a low-odor and high-flame-retardant material, the substances including: polyvinyl chloride resin, plasticizer, liquid flame retardant, powder flame retardant, adhesive and diluent; adding the weighed substances required for preparing the low-odor and high-flame-retardant material into a container; The liquid flame retardant includes a phosphorus-based liquid flame retardant and a bromine-based liquid flame retardant; the phosphorus-based liquid flame retardant includes at least one of diphenyl phosphate of toluene, diphenyl phosphate of ditoluene, and trioctyl phosphate; the bromine-based liquid flame retardant includes at least one of bis(2-ethylhexyl)tetrabromophthalate, dimethyl tetrabromophthalate, dihexyl tetrabromophthalate, diheptyl tetrabromophthalate, and didecyl tetrabromophthalate; The powder flame retardant includes at least one of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc compounds and inorganic minerals; the zinc compound includes at least one of zinc borate, zinc aluminate and zinc stannate; the inorganic mineral includes at least one of sodium montmorillonite, calcium montmorillonite, wollastonite, vermiculite, kaolinite and halloysite; The adhesive is at least one of 1,3-diisocyanatotoluene and aromatic polyisocyanurate; the diluent includes at least one of environmentally friendly dearomatized solvent oil and isoparaffin solvent oil; Step S2, stirring the slurry in the container at a speed of 800-2500 rpm, and monitoring the slurry temperature during the stirring and mixing process; stopping stirring after the slurry temperature reaches 25-45° C., and letting the slurry stand for 2-48 hours; Step S3, adding the phosphorus-based liquid flame retardant again, stirring at a speed of 200-1500rpm for 5-40min to obtain a low-odor and highly flame-retardant material; the stirring speed of step S2 is greater than the stirring speed of step S3; the phosphorus-based liquid flame retardant includes at least one of toluene diphenyl phosphate, ditoluene phenyl phosphate, and trioctyl phosphate.

2. The method for preparing a low-odor and highly flame-retardant material according to claim 1, characterized in that: In the step S1, the substances required for preparing the low-odor and high-flame-retardant material are weighed, including: 100 parts of polyvinyl chloride resin, 10-40 parts of plasticizer, 25-55 parts of liquid flame retardant, 5-50 parts of powder flame retardant, 1-10 parts of adhesive, and 10-30 parts of diluent; the above parts are measured by weight.

3. The method for preparing a low-odor and highly flame-retardant material according to claim 2, characterized in that: In the step S1, the amount of phosphorus-based liquid flame retardant in the liquid flame retardant is 20-30 parts.

4. The method for preparing a low-odor and highly flame-retardant material according to claim 2, characterized in that: The preparation method further comprises step S4: adding 5-20 parts of a diluent to obtain a low-odor and highly flame-retardant material.

5. The method for preparing a low-odor and highly flame-retardant material according to claim 1, characterized in that: In the step S3, 5-25 parts of phosphorus-based liquid flame retardant are added again, and the mixture is stirred at a rotation speed of 200-1500 rpm for 5-40 minutes to obtain a low-odor and highly flame-retardant material.

6. The method for preparing a low-odor and highly flame-retardant material according to claim 5, characterized in that: In the step S2, the slurry is stirred at a speed of 1000-1500 rpm; the stirring is stopped after the slurry temperature reaches 30-40° C., and the slurry is allowed to stand for 4-24 hours; In the step S3, 5-25 parts of phosphorus-based liquid flame retardant are added again, and the mixture is stirred at a rotation speed of 500-800 rpm for 15-30 minutes to obtain a low-odor and highly flame-retardant material.

7. A method for preparing a low-odor and highly flame-retardant fabric, characterized in that: The preparation method comprises: Step 1, preparing a low-odor and high-flame-retardant slurry using the preparation method of a low-odor and high-flame-retardant material according to any one of claims 1 to 6; Step 2, spraying the prepared flame retardant slurry onto the base fabric layer, and making the base fabric layer completely immersed in the slurry; Step 3: remove the excess flame retardant slurry by rolling, place the rolled fabric in a baking device, and dry it to obtain a low-odor and highly flame retardant fabric.

8. The method for preparing the low-odor and highly flame-retardant fabric according to claim 7, characterized in that: The method further comprises step 1' between step 1 and step 2: when the viscosity of the mixed slurry is greater than a set threshold, after adding the phosphorus-based liquid flame retardant in step S3, in order to reduce the swelling effect of the phosphorus-based liquid flame retardant on the PVC particles, adding an appropriate amount of diluent to make the slurry viscosity 180-320 mPa.S.

9. The method for preparing the low-odor and highly flame-retardant fabric according to claim 7, characterized in that: The step 3 specifically includes: rolling off the excess flame retardant slurry, controlling the rolling rate to be 65-105%, placing the impregnated fabric in a baking device, controlling the fabric's travel speed in the baking device to be 3-20 m / min, the baking device temperature to be 100-200°C, and drying to obtain a low-odor, highly flame-retardant fabric.

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