A fireproof adhesive composite basalt fiber coating cloth and firework packaging application

Abstract

This invention belongs to the field of safety packaging technology for flammable and explosive materials, and provides an adhesive composite basalt fiber fireproof coated cloth and its application in fireworks packaging. The adhesive composite basalt fiber fireproof coated cloth includes a basalt fiber base fabric, an adhesive layer, a fireproof coating, and a flame-retardant PVC sealing layer. The basalt fiber base fabric has a woven fabric structure. The adhesive layer is attached to the outer surface of the basalt fiber base fabric and penetrates into the fiber gaps, forming a fiber-adhesive composite reinforcement structure. The fireproof coating is compositely connected to the basalt fiber base fabric through the adhesive layer. This invention comprehensively improves the safety protection level of fireworks and gunpowder raw material packaging from the inherent flame retardancy of the material, structural sealing and barrier, to reinforcement of weak points in the system. It also possesses environmental friendliness, economy, and reusability, and can be widely used for safety protection throughout the entire process of production, transportation, and storage of flammable and explosive materials.

Description

Technical Field

[0001] This invention belongs to the field of safety packaging technology for flammable and explosive materials, and particularly relates to an adhesive composite basalt fiber fireproof coating cloth and its application in fireworks packaging. Background Technology

[0002] Fireworks and firecrackers, along with their gunpowder raw materials, are extremely flammable and explosive hazardous materials. The safety performance of their packaging materials is the first line of defense in ensuring safety throughout the entire process of production, transportation, storage, and use. With the rapid development of my country's fireworks and firecrackers industry and increasingly stringent safety regulations, the limitations of existing packaging technologies have become increasingly apparent. Furthermore, there are three progressively worsening core problems that ultimately prevent the inherent safety level of the packaging from meeting practical needs: The basic materials are inherently insufficient in flame retardancy, resulting in fundamental safety defects: Existing fireworks and firecracker packaging mainly uses ordinary paper materials, polyethylene plastic woven cloth, or polyester canvas. These materials are all flammable or combustible substances with ignition points generally below 300°C. Once exposed to open flames, static sparks, or high-temperature environments, they will burn rapidly. Some existing technologies attempt to use inorganic fiber base cloth to make fireproof packaging, but they generally have problems such as low melting point, easy melting and dripping at high temperatures, and poor mechanical properties that make them easy to break. They cannot meet the high strength and high fire resistance requirements of fireworks and firecracker packaging. During combustion, they release a large amount of heat and toxic gases, and at the same time ignite the fireworks or gunpowder raw materials inside, causing a violent explosion in a very short time, resulting in catastrophic consequences. Insufficient structural sealing and barrier properties result in fatal flaws in the protection system: Even though some existing packaging uses modified materials with added flame retardants, which improves the flame retardancy to some extent, serious structural defects still exist. On the one hand, ordinary flame retardant materials can only delay combustion, not completely prevent flame penetration. When the external fire is large or the burning time is long, the flames can still penetrate the packaging material and ignite the contents. On the other hand, the existing packaging materials have high porosity and cannot effectively prevent the intrusion of external moisture and humidity. This makes gunpowder raw materials and finished fireworks products susceptible to moisture damage and failure during long-term storage. Moisture-damaged gunpowder not only reduces its combustion and explosion performance but may also generate internal stress due to uneven moisture absorption, leading to accidental explosions during handling. In addition, when the contents accidentally burn, the existing packaging cannot effectively seal the internal flames and high-temperature gases, causing flames to escape and trigger a chain explosion. Insufficient system protection integrity and weak points leading to overall failure: Existing fireproof packaging technologies often only focus on the performance of the main packaging material, neglecting the protection of weak points such as seams and sealing openings. Ordinary sewing threads and sealing materials are flammable substances. Even if the main packaging material has good flame retardancy, these weak points can become gaps for flame penetration, causing the entire protection system to fail. At the same time, existing packaging lacks differentiated design. Regardless of packaging size or load weight, packaging materials of uniform thickness and material are used. Large-sized packaging is prone to damage and leakage due to insufficient material strength, while small-sized packaging is too costly due to excessive protection. It is impossible to achieve the optimal balance between performance and cost, which limits the large-scale promotion and application of fireproof packaging technology.

[0003] Therefore, a type of adhesive composite basalt fiber fireproof coating cloth and its application in fireworks packaging is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide an adhesive composite basalt fiber fireproof coating fabric and its application in fireworks packaging, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adhesive-bonded composite basalt fiber fire-retardant coated fabric, comprising a basalt fiber base fabric, an adhesive layer, a fire-retardant coating, and a flame-retardant PVC sealing layer; the basalt fiber base fabric is a woven fabric structure; the adhesive layer is attached to the outer surface of the basalt fiber base fabric and penetrates into the fiber gaps of the basalt fiber base fabric, forming a fiber-adhesive composite reinforcement structure; the fire-retardant coating is compositely connected to the basalt fiber base fabric through the adhesive layer, and the fire-retardant coating and the adhesive layer form an interpenetrating network structure; the flame-retardant PVC sealing layer is continuously attached to the inner surface of the basalt fiber base fabric; the basalt fiber base fabric is woven from undyed basalt fibers; The basalt fiber base fabric is a woven structure that serves as the skeleton of the entire coated fabric, providing basic mechanical strength and natural flame retardant properties. The adhesive layer is attached to the outer surface of the basalt fiber base fabric and penetrates into the fiber gaps, forming a fiber-adhesive composite reinforcement structure to achieve a strong bond between the base fabric and the fire-retardant coating. The fire-retardant coating is bonded to the basalt fiber base fabric through the adhesive layer and forms an interpenetrating network structure with the adhesive layer, further enhancing the fire-resistant and heat-insulating performance of the outer layer. The flame-retardant PVC sealing layer is continuously attached to the inner surface of the basalt fiber base fabric, forming a continuous and seamless sealed barrier layer. The basalt fiber base fabric is woven from undyed basalt fibers, utilizing its natural color to meet usage requirements.

[0006] Furthermore, the basalt fiber base fabric includes thick basalt fiber woven fabric and thin basalt fiber woven fabric; Thick basalt fiber woven fabrics have higher mechanical strength and protective properties, making them suitable for making large-size, high-capacity packaging; thin basalt fiber woven fabrics have better flexibility and economy, making them suitable for making small-size, individual retail packaging.

[0007] Furthermore, the adhesive layer is a solid hot melt adhesive layer or a liquid flame-retardant adhesive layer; During the composite process, the adhesive layer penetrates evenly into the interfiber gaps of the basalt fiber base fabric. After cooling or curing, it forms a fiber-adhesive composite reinforcement structure, which not only significantly improves the bonding force between the fireproof coating and the base fabric and prevents the coating from falling off, but also enhances the overall mechanical properties and tear resistance of the base fabric.

[0008] Furthermore, the fire-retardant coating is an inorganic fire-retardant coating layer; Inorganic fire-retardant coatings have excellent high-temperature resistance and fire-resistant and heat-insulating properties. During the composite process, they form an interpenetrating network structure with the adhesive layer, making the two tightly bonded into a whole. This effectively prevents the coating from cracking and peeling off, ensuring the stability of fire-retardant performance during long-term use.

[0009] A fireworks packaging made of adhesive-bonded composite basalt fiber fire-retardant coated fabric, applied to any of the aforementioned adhesive-bonded composite basalt fiber fire-retardant coated fabrics, includes a packaging body, non-combustible sewing thread, and a sealing structure; the packaging body is cut and shaped from the fire-retardant coated fabric according to the design dimensions; the non-combustible sewing thread sews the cut fire-retardant coated fabric into a closed packaging body, ensuring that the fire-retardant performance of the sewn part is consistent with that of the packaging body; the sealing structure is set at the opening of the packaging body to achieve sealing and opening of the packaging.

[0010] Furthermore, the packaging structure is a fire-resistant zipper; The fireproof zipper's chain strap is made of the aforementioned fireproof coated fabric, and the chain teeth and pull tabs are made of stainless steel or other high-temperature resistant metal materials, which have good fireproof performance and durability, and can achieve quick sealing and opening of packaging.

[0011] Furthermore, the packaging structure is a fire-resistant hook and loop fastener; The hook and loop sides of the fireproof hook and loop fastener are made of high-temperature resistant inorganic materials and are firmly connected to the opening edge of the packaging body with non-combustible sewing thread. It is simple and convenient to operate and is suitable for small-sized packaging that needs to be opened frequently.

[0012] Furthermore, the packaging itself has a square structure; The four corners of the square structure are areas where stress is concentrated and are prone to damage. Therefore, a reinforced stitching layer is provided. The reinforced stitching layer is made of fire-retardant coated cloth folded and sewn together in multiple layers with non-combustible sewing thread, which can significantly improve the strength and wear resistance of the corners and prevent leakage of goods due to corner damage during packaging and handling.

[0013] Furthermore, the packaging body has a cylindrical structure; The cylindrical structure has a drawstring at both ends, which is formed by a non-combustible rope threaded through a cloth tube at the end of the packaging body. By tightening the non-combustible rope, the end of the packaging can be sealed, and the size of the seal can be flexibly adjusted according to the quantity and size of the loaded items, which has good adaptability.

[0014] An application of an adhesive-bonded composite basalt fiber fire-retardant coated fabric is disclosed, which is applied to any of the above-mentioned adhesive-bonded composite basalt fiber fire-retardant coated fabrics. The fire-retardant coated fabric is used to make protective bags for gunpowder raw material storage, providing safe and reliable protection for the storage and transportation of gunpowder raw materials.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs an outer natural flame-retardant system to solve the problem of insufficient inherent flame retardancy of the base material: The invention uses basalt fiber woven fabric as the base fabric. Basalt fiber is an inorganic fiber made from natural basalt ore through high-temperature melting and drawing. It inherently possesses natural non-combustible properties, with a melting point exceeding 1450℃. It will not burn, melt, or release toxic or harmful gases in open flames. Combined with an outer inorganic fire-retardant coating bonded by an adhesive layer, a double outer flame-retardant barrier is formed. When exposed to an external open flame, the basalt fiber base fabric first withstands the high temperature and flame impact, preventing combustion. The inorganic fire-retardant coating further blocks external heat from transferring to the packaging interior, reducing the internal temperature and fundamentally eliminating the safety hazard of the packaging material itself being flammable and potentially causing an explosion, thus achieving inherent safety of the packaging material. This invention constructs an inner-layer closed barrier system to solve the problem of insufficient structural sealing and barrier properties: The invention coats the inner surface of a basalt fiber base fabric with a continuous, seamless flame-retardant PVC sealing layer, forming an inner-layer closed barrier system. On one hand, the flame-retardant PVC sealing layer has excellent fire resistance, effectively preventing internal flames and high-temperature gases from escaping outwards, preventing internal combustion from causing external fires and chain explosions. On the other hand, the flame-retardant PVC sealing layer has extremely low water vapor permeability, completely blocking the intrusion of external water vapor and moisture, maintaining a dry environment inside the packaging, preventing gunpowder raw materials and finished fireworks from becoming damp and ineffective, and avoiding accidental explosions caused by uneven moisture absorption. Simultaneously, the flame-retardant PVC sealing layer also prevents gunpowder dust from leaking through the fiber gaps of the packaging material, reducing the risk of static electricity accumulation, and further improving packaging safety. This invention constructs a fully non-combustible packaging system to solve the problem of insufficient system protective integrity: This invention employs a fully non-combustible packaging system, with all seams sewn with non-combustible thread. The packaging structure uses fire-resistant zippers or fire-resistant Velcro, completely eliminating fire hazards at weak points such as seams and sealing openings. Simultaneously, basalt fiber base fabrics of varying thicknesses are used according to packaging specifications. Thicker base fabrics are used for large-sized packaging, providing higher strength and protective performance to meet the transportation and storage requirements of heavy products; thinner base fabrics are used for smaller individual packages, effectively reducing material costs while ensuring safety. Furthermore, the packaging of this invention uses an openable and closable packaging structure, allowing for repeated sealing and opening, and is recyclable after use, avoiding resource waste caused by disposable packaging and significantly reducing usage costs.

[0016] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] In the diagram: 1. Basalt fiber base fabric; 11. Thick basalt fiber woven fabric; 12. Thin basalt fiber woven fabric; 2. Adhesive layer; 3. Fireproof coating; 4. Flame-retardant PVC sealing layer. Detailed Implementation

[0019] The present invention will be further described below with reference to embodiments.

[0020] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0021] Example 1: Implementation of the outer natural flame retardant system This embodiment constructs an outer layer of natural flame-retardant system to solve the problem of insufficient inherent flame retardancy of the base material.

[0022] like Figure 1 As shown, the adhesive composite basalt fiber fireproof coating cloth provided in this embodiment includes a basalt fiber base cloth 1, an adhesive layer 2, and a fireproof coating 3. The basalt fiber base cloth 1 is a plain weave woven fabric structure, woven from undyed continuous basalt fiber yarn. The undyed basalt fiber is naturally dark brown or black, with uniform color, and does not require any additional dyeing agent. The production process is green and environmentally friendly.

[0023] The adhesive layer 2 is a liquid flame-retardant adhesive layer, which uses an acrylic flame-retardant adhesive with added flame retardants. In the composite process, the liquid flame-retardant adhesive is first uniformly coated on the outer surface of the basalt fiber base fabric 1. The liquid flame-retardant adhesive has good fluidity and can uniformly penetrate into the fiber gaps of the basalt fiber base fabric 1. Then, the inorganic fire-retardant coating is uniformly coated on the surface of the adhesive layer 2. During the coating process, the inorganic fire-retardant coating and the liquid flame-retardant adhesive interpenetrate to form an interpenetrating network structure. Finally, it is dried and cured at a temperature of 120℃-150℃, so that the adhesive layer 2 and the fire-retardant coating 3 are firmly bonded to the outer surface of the basalt fiber base fabric 1.

[0024] After curing, the adhesive layer 2 bonds the basalt fiber monofilaments together, forming a fiber-adhesive composite reinforcement structure, which significantly improves the tear resistance and tensile strength of the base fabric. At the same time, the adhesive layer 2, as an intermediate transition layer, effectively alleviates the difference in thermal expansion coefficients between the basalt fiber base fabric 1 and the fireproof coating 3, preventing the coating from cracking and peeling off when the temperature changes. The fireproof coating 3 uses an inorganic fireproof coating with aluminum hydroxide and magnesium hydroxide as the main flame-retardant components, which has excellent high-temperature resistance and fireproof and heat insulation properties. When the temperature reaches above 200℃, the inorganic fireproof coating will undergo a decomposition reaction, releasing crystal water and absorbing a large amount of heat, while forming a dense carbonized layer, further blocking the transfer of heat and oxygen.

[0025] Core effect formula: Calculation of heat transfer coefficient of composite structure The core effect of the outer natural flame-retardant system in this embodiment is quantified by the heat transfer coefficient of the composite structure, as shown in the following formula:

[0026] in: λ total The total heat transfer coefficient of the composite fireproof coating fabric, expressed in W / (m·K), is determined by a thermal conductivity tester (such as the DRL-III type heat flow method thermal conductivity tester). d1: The thickness of basalt fiber base fabric 1, in meters, is obtained by averaging the measurements taken at 10 different locations using a digital thickness gauge (accuracy 0.01 mm). λ1: Thermal conductivity of basalt fiber base fabric 1, in W / (m·K), obtained by measuring the basalt fiber base fabric separately using a thermal conductivity meter; d2: The thickness of adhesive layer 2, in meters, is obtained by measuring the thickness difference of the base fabric before and after lamination using a coating thickness gauge (accuracy 0.1 μm). λ2: Thermal conductivity of adhesive layer 2, in W / (m·K), obtained by measuring the cured adhesive layer separately using a thermal conductivity meter; d3: The thickness of fireproof coating 3, in meters, is obtained by measuring the total thickness after lamination with a coating thickness gauge and subtracting the thickness of the base fabric and adhesive layer. λ3: Thermal conductivity of fire-retardant coating 3, in W / (m·K), obtained by measuring the cured fire-retardant coating separately using a thermal conductivity meter.

[0027] Formula constraints: The thickness d1 of the basalt fiber base fabric ranges from 0.1mm to 1.0mm, where the thickness of the base fabric is d1 = 0.5mm to 1.0mm and the thickness of the base fabric is d1 = 0.1mm to 0.5mm. The adhesive layer thickness d2 ranges from 0.05mm to 0.2mm to ensure complete penetration into the fiber gaps without sagging. The thickness d3 of the fire-retardant coating is in the range of 0.1mm-0.5mm, which ensures fire resistance while avoiding excessive coating thickness that would reduce flexibility.

[0028] Control logic: Optimize the overall heat transfer coefficient λ by adjusting the thickness parameters of each layer. total When higher fireproof and heat insulation performance is required, the thickness of the fireproof coating d3 and the thickness of the basalt fiber base fabric d1 should be appropriately increased; when better flexibility and economy are required, the thickness of each layer should be appropriately reduced; the heat transfer coefficient under different thickness combinations can be accurately predicted by formula calculation, thereby achieving a precise match between performance and cost.

[0029] Overall effect achieved: The overall heat transfer coefficient λ of the composite structure in this embodiment total With a heat resistance of ≤0.03 W / (m·K), it is far lower than the 0.08 W / (m·K) of ordinary inorganic fiber fireproof cloth and the 0.15 W / (m·K) of ordinary flame-retardant cloth. When the external temperature is 1000℃, the internal temperature of the packaging does not exceed 180℃ within 120 minutes, which is lower than the auto-ignition temperature of gunpowder (220℃). It can effectively prevent external open flames and heat from being transferred to the inside of the packaging, fundamentally eliminating the safety hazard of explosion caused by the flammability of the packaging material itself.

[0030] Working principle: When the fire-retardant coated cloth of this embodiment encounters an external open flame, the outermost fire-retardant coating 3 first withstands the flame impact; the fire-retardant coating 3 undergoes a decomposition endothermic reaction, reducing the surface temperature and forming a carbonized layer to block oxygen; even if the fire-retardant coating 3 is partially damaged under prolonged high temperature, the inner basalt fiber base cloth 1 can still maintain its complete structure and non-combustible properties, continuing to block the transfer of flames and heat to the inside of the packaging; since basalt fiber itself does not burn and does not produce molten drips, it will not ignite other surrounding items, fundamentally eliminating the safety hazard of the packaging material itself being flammable and causing an explosion.

[0031] Example 2: Implementation of an inner-layer closed barrier system This embodiment constructs an inner closed barrier system to solve the problem of insufficient structural sealing and barrier properties.

[0032] Based on Example 1, the adhesive composite basalt fiber fireproof coating cloth of this example also includes a flame-retardant PVC sealing layer 4. The flame-retardant PVC sealing layer 4 is coated on the inner surface of the basalt fiber base cloth 1. The flame-retardant PVC resin contains antimony-based flame retardants and plasticizers, and has good flame-retardant properties, flexibility and sealing properties. During the coating process, the flame-retardant PVC slurry is uniformly coated on the inner surface of the basalt fiber base cloth 1 by scraping or roller coating, and then plasticized and molded at a temperature of 140℃-160℃ to form a continuous seamless film-like sealing layer.

[0033] The flame-retardant PVC sealing layer 4 completely covers the inner surface of the basalt fiber base fabric 1, filling all the fiber gaps of the base fabric and forming a dense barrier. This barrier has an extremely low water vapor permeability, which can effectively prevent the intrusion of external water vapor and moisture, keeping the relative humidity inside the packaging below 30%, ensuring that the gunpowder raw materials and finished fireworks will not become damp and ineffective during long-term storage. At the same time, the flame-retardant PVC sealing layer 4 can also prevent gunpowder dust from leaking from the fiber gaps of the packaging material, reducing the accumulation of gunpowder dust on the packaging surface, thereby reducing the risk of explosion caused by static electricity.

[0034] When the contents inside the packaging accidentally catch fire, the flame-retardant PVC sealing layer 4 can withstand high temperatures and flame impacts for a certain period of time, preventing the internal flames and high-temperature gases from escaping outwards. When the flame-retardant PVC burns, it forms a dense carbonized layer that seals the internal space of the packaging and isolates the oxygen supply, thereby inhibiting the continued combustion. Even if the internal pressure increases and causes the flame-retardant PVC sealing layer 4 to rupture locally, the outer basalt fiber base fabric 1 and fireproof coating 3 can still continue to play a protective role and prevent the flames from spreading outwards on a large scale.

[0035] Core performance formula: Calculation of water vapor transmission rate of flame-retardant PVC sealing layer The core moisture-proof effect of the inner closed barrier system in this embodiment is quantified by water vapor transmission rate, as shown in the following formula:

[0036] in: WVT: Water vapor transmission rate of flame-retardant PVC sealing layer, in g / (m²·24h), determined by a water vapor transmission rate tester (such as W3 / 030 type water vapor transmission rate tester) according to GB / T 1037-2008 standard; D: Diffusion coefficient of water vapor in flame-retardant PVC, in m² / s. The diffusion coefficient at different temperatures was determined by constant temperature and humidity chamber and weighing method. The value at 25℃ was taken. ΔP: The difference in partial pressure of water vapor across the sealed layer, measured in Pa, is calculated from the relative humidity and temperature inside and outside the packaging. , where P out For external water vapor partial pressure, P in Internal water vapor partial pressure; A: The effective area of ​​the test sample, in m², is determined by the test chamber size of the water vapor transmission rate tester; t: Test time, in seconds, usually 24 hours (86400 seconds). d: The thickness of the flame-retardant PVC sealing layer 4, in meters, is obtained by measuring the average value at 10 different locations using a coating thickness gauge.

[0037] Formula constraints: The thickness d of the flame-retardant PVC sealing layer is in the range of 0.05mm-0.3mm. If the thickness is too thin, the water vapor permeability will increase, and if the thickness is too thick, the flexibility of the packaging will be reduced. The test environment temperature was 25℃±2℃ and the relative humidity was 90%±2%, which met the national standard test conditions. The relative humidity inside the packaging is controlled below 30% to ensure the safe storage of gunpowder raw materials.

[0038] Control Logic: The water vapor transmission rate (WVT) is controlled by adjusting the thickness d of the flame-retardant PVC sealing layer. When higher moisture-proof performance is required, the sealing layer thickness d is appropriately increased; when better flexibility is required, the thickness is appropriately reduced. The water vapor transmission rate at different thicknesses can be accurately predicted by formula calculation, ensuring that the relative humidity inside the packaging is always kept within a safe range. At the same time, by controlling the coating process parameters (such as coating speed and drying temperature) during the production process, the continuity and uniformity of the sealing layer are ensured, avoiding pinholes and defects.

[0039] Overall effect achieved: The water vapor transmission rate (WVT) of the flame-retardant PVC sealing layer in this embodiment is ≤5g / (m²·24h), which is much lower than the 500g / (m²·24h) of ordinary inorganic fiber fireproof cloth and the 200g / (m²·24h) of ordinary flame-retardant cloth. Under an environment with an external relative humidity of 90% and a temperature of 25°C, the relative humidity inside the packaging does not exceed 30% within 12 months. This can effectively prevent gunpowder raw materials and finished fireworks from becoming damp and deteriorating, and extend the product's shelf life. At the same time, the sealing layer can completely prevent gunpowder dust leakage, reduce the amount of dust accumulation on the packaging surface, and significantly reduce the risk of explosion caused by static electricity.

[0040] Working principle: During normal storage and transportation, the flame-retardant PVC sealing layer 4 performs its sealing and moisture-proof function, maintaining a dry environment inside the packaging and preventing the gunpowder from getting damp. In the event of an internal combustion accident, the flame-retardant PVC sealing layer 4 first seals the internal space, isolates oxygen, and inhibits combustion; at the same time, it prevents internal flames and high-temperature gases from leaking out, preventing the ignition of external items. In the event of an external fire accident, the outer basalt fiber base cloth 1 and fireproof coating 3 block external flames and heat, while the inner flame-retardant PVC sealing layer 4 further prevents heat from being transferred into the packaging, slowing down the rate of temperature rise of the internal items and buying valuable time for rescue work.

[0041] Example 3: Implementation of a Fully Non-Flammable Encapsulation System This embodiment constructs a non-flammable encapsulation system for the entire system, solving the problem of insufficient system protection integrity.

[0042] Based on the fire-retardant coated fabric of Examples 1 and 2, this example provides three different structures of fireworks packaging, each suitable for different application scenarios; all packaging seams are sewn with non-combustible sewing thread, which is either glass fiber sewing thread or basalt fiber sewing thread, and has the same non-combustible properties as the packaging body, ensuring that the sewn parts will not become weak points in fire protection.

[0043] Zipper-style square fireworks package: This package is made of thick basalt fiber woven fabric and is suitable for loading finished fireworks weighing 5kg-50kg. The package body has a square structure with reinforced stitching layers at the four corners. The reinforced stitching layers are made of 2-3 layers of fire-retardant coated cloth folded and sewn together with non-combustible sewing thread using double stitching, which can significantly improve the strength and wear resistance of the corners and prevent damage to the corners during handling and stacking. The top opening of the package body is equipped with a fire-retardant zipper as a sealing structure. The fire-retardant zipper chain is made of the same fire-retardant coated cloth as the package body. The chain teeth and zipper pull are made of stainless steel and can maintain normal opening and closing function in high-temperature environments.

[0044] Velcro-style round fireworks package: This package is made of thin basalt fiber woven fabric and is suitable for loading single fireworks products or small batches of products weighing less than 5kg. The package body is a cylindrical structure with drawstring structures at both ends. The drawstring structures are formed by non-combustible ropes threaded through the fabric tubes formed by folding and sewing at the ends of the package body. The non-combustible ropes are made of fiberglass rope or basalt fiber rope. The sides of the package body have longitudinal openings, which are sealed with fireproof Velcro. The hook and loop sides of the fireproof Velcro are made of high-temperature resistant ceramic fiber and are firmly connected to the edge of the opening of the package body with non-combustible sewing thread.

[0045] Gunpowder Raw Material Storage Protective Bag: This protective bag is made of thick basalt fiber woven fabric and is suitable for storing highly flammable and explosive materials such as gunpowder raw materials and pyrotechnics. The bag body has a square structure with reinforced stitching layers at the four corners. The top opening is equipped with both a fireproof zipper and a drawstring structure to form a double seal. When using it, first put the gunpowder raw materials into the protective bag, tighten the drawstring structure for initial sealing, and then pull the fireproof zipper for secondary sealing to ensure that no gunpowder leakage occurs.

[0046] Core performance formula: Calculation of overall fire resistance time of packaging The core effect of the all-system non-combustible encapsulation system in this embodiment is quantified by the overall fire resistance time of the packaging, as shown in the following formula:

[0047] in: T total The overall fire resistance time of the packaging, in minutes, is determined by a fire resistance test furnace according to GB / T 9978.1-2008 standard. T body The fire resistance time of the packaging material, in minutes, is obtained by measuring the fire resistance time of the fire-resistant coating fabric separately in a fire resistance test furnace. K suture Fire resistance time coefficient at the seam, dimensionless, obtained by measuring the ratio of the fire resistance time of a sample sewn with non-combustible sewing thread to the fire resistance time of the base material; K seal The fire resistance time coefficient of the encapsulation structure is dimensionless and is obtained by measuring the ratio of the fire resistance time of the sample with the encapsulation structure installed to the fire resistance time of the main body material.

[0048] Formula constraint: Fire resistance time coefficient K at the seam suture ≥0.9, ensuring that the fire resistance of the seam is not less than 90% of that of the base material; The fire resistance time coefficient K of the packaging structure seal ≥0.8, ensuring that the fire resistance of the encapsulation structure is not less than 80% of that of the base material; Fire resistance time T of the packaging material body ≥120min, meeting the safety requirements for fireworks and firecracker packaging.

[0049] Control logic: K is improved by using non-combustible sewing thread and fireproof sealing structure. suture and K seal The coefficient, if ordinary combustible sewing thread is used, is K. suture With a flame strength of only around 0.3, the seam would be breached by the flame in a short time; however, with the use of non-flammable sewing thread, K... sutureIt can be improved to over 0.9. If a common plastic encapsulation structure is used, K seal Only around 0.2; after adopting a fireproof encapsulation structure, K seal It can be improved to over 0.8. The overall fire resistance time under different packaging methods can be accurately predicted through formula calculation, ensuring that the overall protective performance of the packaging meets safety requirements. At the same time, the structural strength and sealing performance of the packaging are further improved by strengthening the stitching layer and double sealing design.

[0050] Overall effect achieved: The overall fire resistance time T of the packaging in this embodiment total With a lifespan of ≥90 minutes, far exceeding the 30 minutes of existing fireproof packaging, the non-combustible design of the entire system completely eliminates fire hazards at weak points such as seams and sealing openings, thus improving the overall fire resistance of the packaging. At the same time, the thickness gradient design enhances the damage resistance of large packaging and reduces the material cost of small packaging, achieving an optimal balance between performance and cost. The packaging can be reused more than 50 times, reducing the total life cycle cost.

[0051] Working principle and usage scenarios: Bulk transportation and storage of finished fireworks and firecrackers: using zippered square fireworks packaging; The finished fireworks are neatly stacked inside the packaging body, and the fireproof zipper can be closed to achieve a seal. During transportation, the thick basalt fiber woven fabric provides sufficient mechanical strength to prevent the packaging from being damaged. The non-combustible structure of the entire system ensures that even if it is exposed to an external open flame, it will not burn or explode. The inner flame-retardant PVC sealing layer 4 keeps the inside of the packaging dry and prevents the product from getting damp. After use, open the fireproof zipper to take out the product. The packaging is recyclable and reusable.

[0052] Fireworks retail and temporary household storage scenarios: use Velcro-sealed round fireworks packages; Simply place individual fireworks into the packaging, attach the fire-retardant Velcro, and tighten the drawstrings at both ends to achieve a seal. The thin basalt fiber woven fabric has a beautiful and elegant natural color, and product information can be printed directly on the surface. For home use, unlit leftover products can be resealed and stored to prevent children from accessing them, thus improving safety.

[0053] Scenario for gunpowder raw material storage and transportation: Use of protective bags for gunpowder raw material storage; The double-sealed structure ensures that the gunpowder raw materials will not leak; the all-non-combustible structure and three-layer protection system can effectively prevent explosions caused by external open flames and static electricity; the excellent sealing and moisture-proof performance can extend the storage period of the gunpowder raw materials, and the protective bag can be reused, which greatly reduces the packaging cost of the gunpowder raw materials.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fire resistant coated fabric comprising basalt fibers bonded together, characterized in that, The product comprises a basalt fiber base fabric (1), an adhesive layer (2), a fire-retardant coating (3), and a flame-retardant PVC sealing layer (4). The basalt fiber base fabric (1) is a woven fabric structure. The adhesive layer (2) is attached to the outer surface of the basalt fiber base fabric (1) and penetrates into the fiber gaps of the basalt fiber base fabric (1) to form a fiber-adhesive composite reinforcement structure. The fire-retardant coating (3) is compositely connected to the basalt fiber base fabric (1) through the adhesive layer (2), and the fire-retardant coating (3) and the adhesive layer (2) form an interpenetrating network structure. The flame-retardant PVC sealing layer (4) is continuously attached to the inner surface of the basalt fiber base fabric (1). The basalt fiber base fabric (1) is woven from undyed basalt fibers.

2. The fire protective coated fabric of claim 1, wherein, The basalt fiber base fabric (1) includes thick basalt fiber woven fabric and thin basalt fiber woven fabric.

3. The adhesive-bonded composite basalt fiber fireproof coating fabric according to claim 1, characterized in that, The adhesive layer (2) is a solid hot melt adhesive layer or a liquid flame retardant adhesive layer.

4. The fire protective coated fabric of claim 1, wherein the adhesive is a polyurethane adhesive. The fireproof coating (3) is an inorganic fireproof coating layer.

5. A firework package of adhesive composite basalt fiber fireproof coating cloth, applied to the adhesive composite basalt fiber fireproof coating cloth of any one of claims 1-4, characterized in that, It includes a packaging body, non-combustible sewing thread, and a sealing structure; the packaging body is cut and shaped from the fire-retardant coated fabric; the non-combustible sewing thread sews the cut fire-retardant coated fabric into a closed packaging body; the sealing structure is located at the opening of the packaging body.

6. The fireworks packaging of the adhesive-bonded composite basalt fiber fireproof coated fabric according to claim 5, characterized in that, The encapsulation structure is a fireproof zipper, the zipper belt is made of the fireproof coated cloth, and the zipper teeth and pull head are made of metal.

7. The fireworks packaging of the adhesive-bonded composite basalt fiber fireproof coated fabric according to claim 5, characterized in that, The packaging structure is a fireproof hook and loop fastener, and both the hook and loop sides of the fireproof hook and loop fastener are connected to the opening edge of the packaging body by non-combustible sewing thread.

8. The fireworks packaging of the adhesive-bonded composite basalt fiber fireproof coated fabric according to claim 5, characterized in that, The packaging body has a square structure, and the four corners of the square structure are provided with a reinforcing stitching layer. The reinforcing stitching layer is made by folding the fire-retardant coated cloth and sewing it in multiple layers with non-combustible sewing thread.

9. The fireworks packaging of the adhesive-bonded composite basalt fiber fireproof coated fabric according to claim 5, characterized in that, The packaging body is a cylindrical structure, and the two ends of the cylindrical structure are provided with a drawstring structure. The drawstring structure is formed by a non-flammable rope passing through a cloth tube at the end of the packaging body.

10. An application of an adhesive-bonded composite basalt fiber fire-retardant coated fabric, applied to the adhesive-bonded composite basalt fiber fire-retardant coated fabric according to any one of claims 1-4, characterized in that, The fire-retardant coated fabric is used to make protective bags for gunpowder raw material storage.

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