A partitioned flame-retardant sealing membrane

Abstract

This utility model discloses a zoned flame-retardant sealing membrane, belonging to the field of fire protection technology. It includes a sealing membrane body comprising a substrate layer, a flame-retardant layer, and a heat-insulating layer. This utility model achieves synergistic complementarity in both space and function of the flame-retardant mechanism through a composite flame-retardant structure with alternating physical and chemical flame-retardant units. This significantly improves the sealing membrane's responsiveness and long-lasting protective capability under fire conditions. The physical flame-retardant units utilize inorganic flame-retardant materials, forming a robust heat-insulating skeleton at high temperatures, effectively delaying heat transfer to the substrate layer. The chemical flame-retardant units employ an organic flame-retardant system with added nano-magnesium hydroxide. Upon heating, this system not only absorbs heat and decomposes, lowering the ambient temperature, but also releases water vapor to dilute combustible gases and inhibit combustion chain reactions. The two are arranged in strip-like intervals, avoiding the functional limitations of a single flame-retardant mode. The zoned design achieves a dual mechanism of physical isolation and chemical inhibition.

Description

Technical Field

[0001] This utility model relates to the field of sealing film technology, specifically a partitioned flame-retardant sealing film. Background Technology

[0002] Existing fireproof sealing materials, such as expanding foam, fireproof putty, or single flame-retardant modules, constitute the main components of current passive fire protection systems. These materials have good plasticity and sealing performance at room temperature, and can effectively fill various gaps and holes formed when cables and pipes pass through building structures.

[0003] The fireproof principle of existing fireproof sealing materials lies in the physical and chemical reaction that occurs when exposed to fire. This usually manifests as rapid carbonization and expansion of the entire material, forming a dense carbonized layer. This carbonized layer has a certain degree of heat insulation and oxygen barrier properties, thus theoretically achieving the effects of fire resistance, heat insulation, and sealing.

[0004] However, its response mode is singular. Once heated, it initiates an expansion process, making it difficult to respond intelligently and in stages according to the different stages of fire development. Its protection strategy is rigid. Because its response is holistic, if a part of the seal is burned through first due to uneven heating, material aging, or installation defects, it will form a pressure relief and combustion channel. The fire will concentrate its attack on this weak point, which can easily lead to the failure of the entire sealing system and the loss of its proper barrier function. Utility Model Content

[0005] The purpose of this invention is to provide a partitioned flame-retardant sealing film to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a partitioned flame-retardant sealing film, comprising a sealing film body, the sealing film body comprising a substrate layer, a flame-retardant layer and a heat insulation layer, a sealing layer provided on one side of the heat insulation layer, the substrate layer being the basic support layer of the sealing film body, the flame-retardant layer being disposed above the substrate layer, the flame-retardant layer comprising physical flame-retardant units and chemical flame-retardant units, the heat insulation layer being disposed above the flame-retardant layer, and the sealing layer being disposed above the heat insulation layer.

[0007] As a further preferred embodiment of this technical solution, the physical flame-retardant unit is a partition composed of inorganic flame-retardant materials, and the chemical flame-retardant unit is a partition composed of organic flame-retardant materials.

[0008] As a further preferred embodiment of this technical solution, the physical flame-retardant units and the chemical flame-retardant units are arranged alternately in strips.

[0009] As a further preferred embodiment of this technical solution, the substrate layer is a polymer film, the heat insulation layer is an aerogel composite material, and the sealing layer is an elastic sealant layer.

[0010] This utility model provides a partitioned flame-retardant sealing film, which has the following beneficial effects: (1) This utility model achieves the synergistic complementarity of the flame retardant mechanism in space and function by setting up a composite flame retardant structure with alternating arrangement of physical flame retardant units and chemical flame retardant units. It significantly improves the response adaptability and long-term protection capability of the sealing film under fire conditions. The physical flame retardant unit adopts inorganic flame retardant material. Relying on its high thermal stability and low thermal conductivity, it forms a solid heat insulation skeleton at high temperature, effectively delaying the transfer of heat to the substrate layer. The chemical flame retardant unit adopts an organic flame retardant system with added nano magnesium hydroxide. When heated, it not only absorbs heat and decomposes, reducing the ambient temperature, but also releases water vapor to dilute combustible gas and inhibit the combustion chain reaction. The two are arranged in strips, which avoids the functional limitations of a single flame retardant mode. The partition design realizes the dual mechanism of physical isolation and chemical inhibition. When local fire occurs, it can effectively prevent the spread of flames and heat accumulation, and prevent the overall sealing structure from collapsing due to single-point failure. It is especially suitable for harsh environments where fire development is uneven or continuous high temperature impact.

[0011] (2) This utility model divides the flame-retardant layer into micro-regions by introducing a laser-etched dotted line structure, thereby realizing the transformation of the flame-retardant function from an overall response to a locally controllable response. This greatly enhances the ablation resistance and structural integrity of the sealing film. The dotted line depth is controlled at 30% to 50% of the film thickness, which not only ensures the mechanical properties and sealing effect of the material under normal conditions, but also guides the flame to slowly expand along a predetermined path under high temperature conditions, avoiding the flame from concentrating on a certain area and causing breakdown, thus significantly improving the reliability and durability of the overall fire protection system. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the planar structure of the sealing membrane body of this utility model.

[0013] In the figure: 1. Sealing film body; 101. Substrate layer; 102. Flame retardant layer; 1021. Physical flame retardant unit; 1022. Chemical flame retardant unit; 103. Heat insulation layer; 104. Sealing layer. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] like Figure 1 and Figure 2As shown, this utility model provides a partitioned flame-retardant sealing membrane, including a sealing membrane body 1. The sealing membrane body 1 includes a substrate layer 101, a flame-retardant layer 102, and a heat insulation layer 103. A sealing layer 104 is provided on one side of the heat insulation layer 103. The substrate layer 101 is the basic support layer of the sealing membrane body 1. The flame-retardant layer 102 is disposed above the substrate layer 101 and includes physical flame-retardant units 1021 and chemical flame-retardant units 1022. The heat insulation layer 103 is disposed above the flame-retardant layer 102, and the sealing layer 104 is disposed above the heat insulation layer 103. The sealing layer 104 is disposed on the outside of the heat insulation layer 103 and is typically made of polyurethane-based elastic sealant or other high-temperature elastomer materials. This layer not only provides excellent initial adhesion performance, ensuring a tight fit between the sealing membrane and the building structure or pipe penetration, but also has good elastic recovery ability, maintaining a sealed state even in high-temperature environments and preventing smoke and flame penetration.

[0016] Specifically, the substrate layer 101 is a polymer film, the heat insulation layer 103 is an aerogel composite material, the heat insulation layer 103 is a nanoporous aerogel composite material with extremely low thermal conductivity, which can effectively block heat transfer; the sealing layer 104 is an elastic sealant layer, the sealing layer 104 is a polyurethane-based elastic sealant with good adhesion and elastic recovery ability, ensuring that the sealing performance can still be maintained at high temperature.

[0017] like Figure 1 and Figure 2 As shown, the physical flame retardant unit 1021 is a partition composed of inorganic flame retardant material, and the chemical flame retardant unit 1022 is a partition composed of organic flame retardant material. The physical flame retardant unit 1021 and the chemical flame retardant unit 1022 are arranged in alternating strips.

[0018] Specifically, the physical flame-retardant unit 1021 is a point-break line unit, which is divided into multiple independent flame-retardant areas. The point-break lines are formed by laser etching, with a depth of 30%-50% of the film thickness. When the local area is heated, the point-break lines can guide the flame to spread along a preset path, so that adjacent flame-retardant areas form physical isolation and delay the spread of fire. The chemical flame-retardant unit 1022 contains nano-sized magnesium hydroxide flame retardant, which decomposes when heated, absorbs heat and releases water vapor, achieving dual flame retardancy in conjunction with the point-break line structure.

[0019] Physical flame-retardant unit 1021 and chemical flame-retardant unit 1022 are arranged in an alternating strip pattern to form a functional spatial partition. This design allows the physical and chemical flame-retardant mechanisms to work synergistically in the event of a fire, significantly improving the overall fire resistance. The physical flame-retardant unit 1021 is formed with a dotted line structure by laser etching technology, further dividing the unit into multiple independent flame-retardant areas. The depth of the dotted lines is precisely controlled between 30% and 50% of the total thickness of the film. This design ensures the integrity and sealing performance of the material under normal conditions, and guides the flame to spread slowly along a predetermined path under high-temperature conditions.

[0020] This invention provides a zoned flame-retardant sealing membrane, employing a composite flame-retardant structure with alternating physical and chemical flame-retardant units. This achieves synergistic complementarity of the flame-retardant mechanisms in terms of space and function, significantly improving the sealing membrane's responsiveness and long-lasting protective capabilities under fire conditions. The physical flame-retardant units utilize inorganic flame-retardant materials, relying on their high thermal stability and low thermal conductivity to form a robust heat-insulating skeleton at high temperatures, effectively delaying heat transfer to the substrate layer. The chemical flame-retardant units employ an organic flame-retardant system with added nano-magnesium hydroxide. Upon heating, this system not only absorbs heat and decomposes, lowering the ambient temperature, but also releases water vapor to dilute combustible gases and inhibit combustion chain reactions. The two units are arranged in a strip-like, spaced configuration, avoiding the functional limitations of a single flame-retardant mode. The zoned design achieves a dual mechanism of physical isolation and chemical inhibition, effectively hindering flame spread and heat accumulation when exposed to localized fires, preventing the overall sealing structure from collapsing due to single-point failure. This design is particularly suitable for harsh environments with uneven fire development or continuous high-temperature impacts.

[0021] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A zoned flame retardant sealing membrane comprising a sealing membrane body (1), characterized in that: The sealing film body (1) includes a substrate layer (101), a flame retardant layer (102) and a heat insulation layer (103). A sealing layer (104) is provided on one side of the heat insulation layer (103). The substrate layer (101) is the basic support layer of the sealing film body (1). The flame retardant layer (102) is disposed above the substrate layer (101). The flame retardant layer (102) includes a physical flame retardant unit (1021) and a chemical flame retardant unit (1022). The heat insulation layer (103) is disposed above the flame retardant layer (102), and the sealing layer (104) is disposed above the heat insulation layer (103).

2. A zoned flame barrier seal film according to claim 1, wherein: The physical flame retardant unit (1021) is a partition made of inorganic flame retardant material, and the chemical flame retardant unit (1022) is a partition made of organic flame retardant material.

3. A zoned flame barrier seal film according to claim 2, wherein: The physical flame-retardant unit (1021) and the chemical flame-retardant unit (1022) are arranged in alternating strips.

4. The zoned flame-sealed film of claim 1, wherein: The substrate layer (101) is a polymer film, the heat insulation layer (103) is an aerogel composite material, and the sealing layer (104) is an elastic sealant layer.

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