Thermal expansion carbonization formed fire retardant package and plugging structure

Abstract

The invention provides a thermal expansion carbonization formed fire-retardant package and a plugging structure. The fire-retardant bag formed by thermal expansion and carbonization comprises a fireproof wrapping bag and a plurality of fireproof and flame-retardant particles formed by thermal expansion and carbonization, wherein the fireproof wrapping bag is filled with the fireproof and flame-retardant particles formed by thermal expansion and carbonization; the fireproof and flame-retardant particles formed by thermal expansion and carbonization are obtained by crushing polyurethane fireproof modules; the polyurethane fireproof module is prepared from 20-30 parts of a polyether polyol composition; 10 to 15 parts of a polyurethane curing agent; 0.05 to 0.4 part of an antioxidant; 0.1-1 part of a hydrolysis stabilizer; 0.1 to 0.5 part of a bactericidal mildew inhibitor; 0.5-3 parts of a smoke suppressant; 10 to 25 parts of a flame retardant; and 15-30 parts of a fireproof functional filler. And each thermal expansion carbonization molded fireproof flame-retardant particle expands when meeting open fire to form a fireproof heat-insulating barrier layer without particle scattering. According to the fire-retardant bag, the fire-retardant bag which is high in moisture resistance and expansibility, good in fire-resistant integrity and high in flame retardance and does not melt the fireproof wrapping bag at a high temperature can be prepared without increasing the number of layers of the fireproof wrapping bag and using a water-based adhesive, and the fire-retardant bag is particularly suitable for being applied to different types and sizes of blocking structures with high humidity.

Description

Technical Field

[0001] The present invention relates to the technical field of fireproof plugging materials, and in particular to a fire-blocking bag and a plugging structure formed by thermal expansion and carbonization. Background Art

[0002] Fire barrier bag is a common fireproof sealing material, which is mainly used for fireproof sealing of cable holes, pipe wall holes, equipment gaps and other locations in the fields of construction, electricity, communications, etc., to prevent the spread of flames, high temperature and toxic smoke during fire.

[0003] Early fire-blocking bags usually adopted a simple structure of "filling particles + outer cloth bag". For details, please refer to Figure 1 However, the early fire-blocking bags had the following disadvantages:

[0004] 1) Poor fire resistance integrity: When encountering fire, the outer fiberglass bag of the fire barrier bag is easily damaged, and the internal filling particles are scattered, causing it to lose its fire resistance integrity and unable to effectively prevent the spread of fire;

[0005] 2) Poor moisture resistance: Traditional fire-retardant bags have limited moisture resistance. In humid environments, such as underground cable trenches and tunnels, traditional fire-retardant bags have poor moisture resistance, which causes the internal filling particles to deteriorate due to moisture, affecting their expansion performance and thermal insulation effect when encountering fire. In severe cases, they may even lose their fire-retardant ability. Since the filling particles easily clump after absorbing water and getting damp, the weight of the fire-retardant bag increases sharply, causing the fire-proof sealing structure to collapse and be damaged.

[0006] 3) The problem of large dust: Since the intumescent light material and flame retardant are filled in the fire-retardant packaging bag as individual individuals, and the flame retardant is generally in powder form, the user may be squeezed by the outside during the installation process, causing the powder particles inside to easily overflow from the gaps or sewing holes of the outer bag, which not only pollutes the environment of the installation site, but also interferes with the user's operation.

[0007] In order to solve the technical problems existing in traditional fire-retardant bags, a new type of fire-retardant bag disclosed in Chinese patent document No. CN 104069600A effectively solves the above technical problems by dividing the fire-retardant packaging bag into two layers, inner and outer, and using a water-based adhesive at the same time. However, when the double-layer fire-retardant packaging bag is damaged and the internal filling particles are exposed, the exposed filling particles will absorb moisture in the air and cause the flame retardant performance to decrease, that is, the problem of poor moisture absorption of the filling particles after the bag is broken cannot be solved. In addition, since the expanded lightweight material and the flame retardant are bonded and fixed by a water-based adhesive, the expanded lightweight material and the flame retardant cannot move freely in the fire-retardant packaging bag, resulting in the inability of traditional fire-retardant bags to be well applied to different types and sizes of plugging structures with high humidity. Summary of the invention

[0008] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a fire-retardant bag and a sealing structure that are heat-expandable and carbonized to obtain moisture-resistant, high-expandable, good fire-resistant integrity, and a fire-retardant bag that does not melt at high temperatures and has high flame retardancy, without the need to increase the number of layers of fire-retardant wrapping bags or use additional water-based adhesives. The fire-retardant bag and the sealing structure are particularly suitable for applications in different types and sizes of sealing structures with high humidity.

[0009] The purpose of this disclosure is achieved through the following technical solutions:

[0010] A heat-expanding carbonized fire-retardant bag, comprising a fire-retardant wrapping bag and a plurality of fire-retardant particles filled in the fire-retardant wrapping bag, wherein the fire-retardant particles are heat-expanding carbonized fire-retardant particles, and the heat-expanding carbonized fire-retardant particles are obtained by crushing polyurethane fire-retardant modules;

[0011] The polyurethane fireproof module is prepared by the following materials in parts by mass:

[0012]

[0013] When in use, each of the heat-expanding carbonized fire-retardant particles expands upon encountering an open flame to form a fire-resistant heat-insulating barrier layer without particle scattering.

[0014] In one of the embodiments, the particle size of the thermal expansion carbonization molded fire retardant particles is 2mm-10mm.

[0015] In one embodiment, the initial low-temperature expansion of the thermal expansion carbonization molded fire-retardant particles is 150°C-300°C.

[0016] In one of the embodiments, the expansion ratio of the thermal expansion carbonization molded fire retardant particles is 200%-300%.

[0017] In one embodiment, the polyether polyol composition comprises the following parts by weight:

[0018]

[0019] In one embodiment, the polyether polyol includes at least one of a high-activity polyether tetraol, a high-activity polyether triol and a polyether diol.

[0020] In one embodiment, the polyurethane curing agent includes at least one of polymethylene polyphenyl isocyanate and diphenylmethane diisocyanate; and / or,

[0021] The antioxidant includes at least one of butyl, octylated diphenylamine (antioxidant 5057), 3,5-di-tert-butyl-4-hydroxyphenylpropionate (antioxidant 1135) and tris(2,4-di-tert-butylphenyl) phosphite; and / or,

[0022] The hydrolysis stabilizer includes at least one of glycerol triglycidyl ether (GE100), tetrakrystal triglycidyl ether (GE500) and polyethylene glycol diglycidyl ether (PEG 400-DGE); and / or,

[0023] The bactericidal and mildew-proofing agent comprises at least one of isothiazolinone compounds, sodium pyrithione, zinc pyrithione, and 2,4,4'-trichloro-2'-hydroxy-diphenyl ether; and / or,

[0024] The smoke suppressant includes ammonium molybdate tetrahydrate, and can also be independently selected from at least one of calcium carbonate, polysiloxane, chitosan and sulfonated graphene; and / or,

[0025] The flame retardant comprises at least one of expandable graphite, ammonium polyphosphate, melamine, pentaerythritol, aluminum hydroxide and magnesium hydroxide; and / or,

[0026] The fireproof functional filler includes at least one of potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate, and can also be independently selected from any several of mica powder, expanded vermiculite and perlite.

[0027] In one embodiment, the preparation of the polyurethane fireproof module comprises the following steps:

[0028] The polyether polyol composition, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler are mixed to obtain a mixture A;

[0029] Mixing the mixture A with the polyurethane curing agent to obtain a mixture B;

[0030] The mixture B is aged at room temperature to obtain the foamed polyurethane fireproof module.

[0031] In one embodiment, the room temperature aging time is 30 min-60 min.

[0032] A blocking structure comprises the fire-retardant package formed by thermal expansion and carbonization as described in any of the above embodiments.

[0033] Compared with the prior art, the present invention has at least the following advantages:

[0034] 1) Since the heat expansion carbonization molded fireproof and flame retardant particles are obtained by crushing the polyurethane fireproof module, and since the polyurethane fireproof module is prepared by mixing the following materials by mass, that is, 20 parts to 30 parts of polyether polyol composition; 10 parts to 15 parts of polyurethane curing agent; 0.05 parts to 0.4 parts of antioxidant; 0.1 parts to 1 parts of hydrolysis stabilizer; 0.1 parts to 0.5 parts of bactericidal and mildewproof agent; 0.5 parts to 3 parts of smoke suppressant; 10 parts to 25 parts of flame retardant; 15 parts to 30 parts of fireproof functional filler to prepare the polyurethane fireproof module, the polyether polyol composition and the polyurethane curing agent can wrap the flame retardant, the fireproof functional filler, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildewproof agent and the smoke suppressant to form a polyurethane resin layer, thereby effectively isolating the moisture from the external air from the flame retardant and the smoke suppressant. The direct contact of fire-proof functional fillers, antioxidants, hydrolysis stabilizers, bactericidal mildew inhibitors and smoke suppressants makes the heat-expandable carbonized fire-retardant particles have better moisture resistance. In this way, there is no need to increase the number of layers of fire-proof wrapping bags and no need to use additional water-based adhesives to ensure that when the heat-expandable carbonized fire-retardant particles are exposed, the flame retardants, fire-proof functional fillers, antioxidants, hydrolysis stabilizers, bactericidal mildew inhibitors and smoke suppressants wrapped therein will not be in direct contact with moisture in the outside air, effectively avoiding the problem that the exposed flame retardants, fire-proof functional fillers, antioxidants, hydrolysis stabilizers, bactericidal mildew inhibitors and smoke suppressants absorb moisture in the air and cause the flame retardant performance to decrease; thereby improving the moisture resistance of the heat-expandable carbonized fire-retardant particles and effectively avoiding the problem of large dust during installation. It is worth mentioning that there is no need to increase the number of layers of the fireproof wrapping bag to ensure that the thickness of the fireproof wrapping bag will not become thicker, so as to ensure that the multiple heat-expanding carbonized fire-retardant particles filled therein can quickly absorb the heat of the flame, thereby effectively controlling the problem of more serious fire spread, and avoiding the problem of more serious initial flame spread caused by the increase in the number of layers of traditional fireproof wrapping bags, which results in the filling particles being unable to absorb the heat of the flame quickly.

[0035] 2) Since there is no need to use water-based adhesives to ensure that multiple heat-expandable carbonized fire-retardant particles can move freely in the fire-retardant wrapping bag, the user can flexibly adjust the structural shape of the heat-expandable carbonized fire-retardant bag according to the on-site sealing structure conditions during installation, so as to better adapt to the application of different types and sizes of sealing structures with high humidity. Furthermore, there is no need to use water-based adhesives, which reduces the sensitivity of the heat-expanding carbonized fire-retardant bag to moisture, so as to ensure that each heat-expanding carbonized fire-retardant particle filled in the fire-proof wrapping bag after long-term storage will absorb heat, carbonize and expand, and form a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer when encountering an open flame of about 1000°C. This improves the fire-resistant integrity of the heat-expanding carbonized fire-retardant bag, thereby ensuring a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer formed by carbonization, so that the fire-resistant and heat-insulating barrier layer can withstand direct burning by flames above 1300°C, effectively avoiding the problem of low fire-resistant performance caused by the low viscosity of the water-based adhesive causing the filling particles to fall off easily when the traditional fire-retardant bag expands in the event of fire after long-term storage.

[0036] 3) Since each heat-expanding carbonized fire-retardant particle can release the chemical crystallization water in the heat-expanding carbonized fire-retardant particle while absorbing heat, the released chemical crystallization water can cool the fireproof wrapping bag and prevent the fireproof wrapping bag from continuing to burn, thereby protecting the fireproof wrapping bag from melting at a high temperature of about 1000°C. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a physical picture of a traditional fire-blocking bag;

[0039] Figure 2 This is a physical picture of the fire-retardant package formed by thermal expansion and carbonization of the present invention;

[0040] Figure 3 This is a physical picture of the polyurethane fireproof module of the present invention;

[0041] Figure 4 This is a comparison chart of the fire resistant integrity of the heat expansion carbonization formed fire retardant bag of Example 1 of the present invention and the traditional fire retardant bag.

[0042] Figure 5 A schematic diagram of a blocking structure in one direction according to an embodiment of the present invention;

[0043] Figure 6 for Figure 5 A schematic structural diagram of the blocking structure in another direction shown;

[0044] Figure 7 A schematic diagram of the structure of a blocking structure in one direction according to another embodiment of the present invention;

[0045] Figure 8 It is a structural schematic diagram of a blocking structure according to yet another embodiment of the present invention;

[0046] Fig. 9 It is a partial structural schematic diagram of a blocking structure of yet another embodiment of the present invention;

[0047] Fig.10 This is a physical picture of the carbonization expansion of the fire-retardant package formed by thermal expansion carbonization of Example 1 of the present invention after being burned by an open flame;

[0048] Figure numerals: 10, blocking structure; 100, first elastic fireproof module; 110, wire hole; 200, heat expansion carbonization molded fireproof module; 210, wire threading groove; 220, heat expansion carbonization molded fireproof bag; 211, first wire threading sub-groove; 212, second wire threading sub-groove; 213, third wire threading sub-groove; 300, hole; 400, second elastic fireproof module; 600, first metal composite fireproof board; 700, second metal composite fireproof board; 800, fireproof installation frame; 810, installation cavity; 900, fireproof support frame; 910, main frame; 920, horizontal bracket; 930, cable trough box; 931, cable; 20, hole. DETAILED DESCRIPTION

[0049] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0050] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0052] The present invention provides a heat expansion carbonization-molded fire-retardant bag, comprising a fireproof wrapping bag and a plurality of fireproof and flame-retardant particles filled in the fireproof wrapping bag, wherein the fireproof and flame-retardant particles are heat expansion carbonization-molded fireproof and flame-retardant particles, and the heat expansion carbonization-molded fireproof and flame-retardant particles are obtained by crushing a polyurethane fireproof module; the polyurethane fireproof module is prepared from the following materials in parts by weight: 20-30 parts of a polyether polyol composition; 10-15 parts of a polyurethane curing agent; 0.05-0.4 parts of an antioxidant; 0.1-1 parts of a hydrolysis stabilizer; 0.1-0.5 parts of a bactericidal and mildewproof agent; 0.5-3 parts of a smoke suppressant; 10-25 parts of a flame retardant; and 15-30 parts of a fireproof functional filler; when in use, each of the heat expansion carbonization-molded fireproof and flame-retardant particles expands when encountering an open flame to form a fire-resistant and heat-insulating barrier layer without particle scattering.

[0053] The above-mentioned heat expansion carbonization molded fire barrier bag, without the need to increase the number of layers of the fireproof wrapping bag and without the need to use additional water-based adhesives, can be used to prepare a heat expansion carbonization molded fire barrier bag and a sealing structure with moisture resistance, high expansion, good fire resistance integrity, the fireproof wrapping bag does not melt at high temperatures and has high flame retardant properties. The fire barrier bag is particularly suitable for applications in different types and sizes of sealing structures with high humidity.

[0054] In order to better understand the technical solution and beneficial effects of the present disclosure, the present disclosure is further described in detail below in conjunction with specific embodiments. A fire-retardant package formed by thermal expansion carbonization in one embodiment, such as Figure 2 As shown, it includes a fireproof wrapping bag and a plurality of fireproof and flame retardant particles filled in the fireproof wrapping bag, wherein the fireproof and flame retardant particles are heat-expanded carbonized fireproof and flame retardant particles, and the heat-expanded carbonized fireproof and flame retardant particles are obtained by crushing a polyurethane fireproof module; the material appearance of the polyurethane fireproof module is as shown Figure 3 As shown, the polyurethane fireproof module is prepared from the following materials by mass: 20-30 parts of polyether polyol composition; 10-15 parts of polyurethane curing agent; 0.05-0.4 parts of antioxidant; 0.1-1 parts of hydrolysis stabilizer; 0.1-0.5 parts of bactericidal and mildew-proof agent; 0.5-3 parts of smoke suppressant; 10-25 parts of flame retardant; 15-30 parts of fireproof functional filler; when in use, each of the heat-expandable carbonized fire-retardant particles expands when encountering an open flame to form a fire-resistant and heat-insulating barrier layer without particle scattering.

[0055] It should be noted that there are some documents that solve the dust and water absorption agglomeration problems by adding plastic inner bags. However, the high temperature performance of general plastic inner bags is poor, which causes them to melt, burn or rupture due to increased internal pressure when exposed to open flames. As a result, the particles filled in traditional fire-retardant bags are easily scattered during the burning process of open flames. That is, traditional fire-retardant bags cannot form a complete fire-resistant and heat-insulating barrier layer when burning with open flames, and thus cannot effectively prevent the spread of fire.

[0056] Therefore, in the present disclosure, without changing the structure of the fireproof wrapping bag, the structure of the heat-expanding carbonized fire-retardant particles is changed to improve the moisture resistance, high expandability and good fire-resistant integrity of the heat-expanding carbonized fire-retardant particles, so as to ensure that all the fire-resistant and heat-insulating barrier layers filled therein are free of scattered particles. Specifically, the polyurethane fireproof module is prepared by mixing the following materials in parts by mass: 20-30 parts of a polyether polyol composition; 10-15 parts of a polyurethane curing agent; 0.05-0.4 parts of an antioxidant; 0.1-1 parts of a hydrolysis stabilizer; 0.1-0.5 parts of a bactericidal and mildew-proof agent; 0.5-3 parts of a smoke suppressant; 10-25 parts of a flame retardant; and 15-30 parts of a fireproof functional filler to prepare the polyurethane fireproof module, so that the polyether polyol composition and the polyurethane curing agent can wrap the flame retardant, the fireproof functional filler, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, and the smoke suppressant to form a polyurethane resin layer, thereby effectively isolating the moisture in the external air from the flame retardant, the fireproof functional filler, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, and the smoke suppressant. The direct contact of stabilizer, bactericidal and mildew-proof agent and smoke suppressant makes the heat-expandable carbonized fire-retardant particles have better moisture resistance. In this way, there is no need to increase the number of layers of fireproof wrapping bags and no need to use additional water-based adhesives to ensure that when the heat-expandable carbonized fire-retardant particles are exposed, the flame retardant, fireproof functional filler, antioxidant, hydrolysis stabilizer, bactericidal and mildew-proof agent and smoke suppressant wrapped therein will not be in direct contact with moisture in the outside air, effectively avoiding the problem that the exposed flame retardant, fireproof functional filler, antioxidant, hydrolysis stabilizer, bactericidal and mildew-proof agent and smoke suppressant will absorb moisture in the air and cause the flame retardant performance to decrease; thereby improving the moisture resistance of the heat-expandable carbonized fire-retardant particles and effectively avoiding the problem of large dust during installation.

[0057] It is worth mentioning that since there is no need to increase the number of layers of the fireproof wrapping bag, the thickness of the fireproof wrapping bag will not become thicker, so as to ensure that the multiple heat-expanding carbonized fire-retardant particles filled in it can quickly absorb the heat of the flame, thereby effectively controlling the serious problem of the spread of the fire, and avoiding the problem of the initial flame spreading seriously due to the increase in the number of layers of the traditional fireproof wrapping bag, which causes the filling particles to be unable to absorb the heat of the flame quickly. In addition, since each heat-expanding carbonized fire-retardant particle can release the chemical crystal water in the heat-expanding carbonized fire-retardant particle while absorbing heat, the released chemical crystal water can cool the fireproof wrapping bag and prevent the fireproof wrapping bag from continuing to burn, thereby protecting the fireproof wrapping bag from melting at a high temperature of about 1000°C.

[0058] It can also be understood that since there is no need to use water-based adhesives, the sensitivity of the heat expansion carbonization molded fire-retardant bag to moisture is reduced, so as to ensure that each heat expansion carbonization molded fire-retardant particle filled in the fireproof wrapping bag after long-term storage will absorb the heat of the flame to carbonize and expand and form a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer when encountering an open flame of about 1000°C, thereby improving the fire resistance integrity of the heat expansion carbonization molded fire-retardant bag, thereby ensuring a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer formed by carbonization, and the formed fire-resistant and heat-insulating barrier layer can withstand direct burning of flames above 1300°C, effectively avoiding the problem of low fire resistance performance caused by the low viscosity of the water-based adhesive when the traditional fire-retardant bag expands in the fire after long-term storage.

[0059] Of course, there are some polyurethane-coated flame retardant materials on the market, such as the degradation-resistant flame-retardant rigid polyurethane foam material disclosed in Chinese patent document No. CN 102977586A. However, the degradation-resistant flame-retardant rigid polyurethane foam material prepared by it is usually a whole piece of material. If it is directly applied to a fire-retardant bag, the whole piece of degradation-resistant flame-retardant rigid polyurethane foam material has poor freedom of movement in the fire-retardant packaging bag, resulting in it being unable to be well adapted to different types and sizes of sealing structures with high humidity.

[0060] Therefore, in the present disclosure, the whole block of degradation-resistant flame-retardant rigid polyurethane foam material is made into granules to effectively solve the problem that the whole block of degradation-resistant flame-retardant rigid polyurethane foam material cannot be well applied to different types and sizes of plugging structures with high humidity. However, some scholars believe that the filling material of the early fire-retardant bag is granular, and under the technical inspiration of Chinese patent document No. CN 102977586A, skilled technicians can easily make the whole block of degradation-resistant flame-retardant rigid polyurethane foam material in CN 102977586A into granules to obtain the technical content of the present disclosure.

[0061] However, in actual applications, since the multiple fire-retardant particles filled in the fire-proof wrapping bag can move freely, that is, there are gaps between the multiple fire-retardant particles filled in the fire-retardant wrapping bag, it is impossible to ensure that each heat-expanding carbonized fire-retardant particle can carbonize and expand when encountering an open flame to form a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer, that is, the fire-resistant integrity of the traditional fire-retardant bag cannot be guaranteed.

[0062] In order to solve the above problems, the present invention optimizes the composition of the heat-expanding carbonized fire-retardant particles and the filling amount of multiple heat-expanding carbonized fire-retardant particles, that is, 20-30 parts of the polyether polyol composition; 10-15 parts of the polyurethane curing agent; 0.05-0.4 parts of the antioxidant; 0.1-1 parts of the hydrolysis stabilizer; 0.1-0.5 parts of the bactericidal and mildew-proof agent; 0.5-3 parts of the smoke suppressant; 10-25 parts of the flame retardant; 15-15 parts of the fire-retardant functional filler When compounded with 30 parts of heat-expandable carbonized fire-retardant particles, high expansion rate heat-expandable carbonized fire-retardant particles can be prepared. At the same time, combined with the use of a plurality of heat-expandable carbonized fire-retardant particles, the plurality of heat-expandable carbonized fire-retardant particles filled in the fire-proof wrapping bag can quickly absorb heat and expand when encountering open flames, and carbonize on the fire-exposed surface of the plurality of heat-expandable carbonized fire-retardant particles to form a uniform, porous, and particle-free fire-resistant heat-insulating barrier layer, thereby improving the fire-resistant integrity of the heat-expandable carbonized fire-retardant bag.

[0063] In this embodiment, the fire-exposed surface refers to the surface where a plurality of heat-expanded carbonized fire-retardant particles are in direct contact with an open flame.

[0064] In this embodiment, since the plurality of heat-expandable carbonized fire-retardant particles have a high expansion rate and are limited by the fireproof wrapping bag, when the local heat-expandable carbonized fire-retardant particles in the heat-expandable carbonized fire-retardant bag encounter an open flame, the local heat-expandable carbonized fire-retardant particles that absorb heat first will slowly expand. As the heat is continuously absorbed, the local heat-expandable carbonized fire-retardant particles will slowly expand and melt. The melted heat-expandable carbonized fire-retardant particles will contact the surrounding heat-expandable carbonized fire-retardant particles, which will quickly transfer heat to the surrounding heat-expandable carbonized fire-retardant particles and also It will bond with the surrounding heat-expanding carbonized fire-retardant particles to form blocks, thereby effectively avoiding the problem of heat-expanding carbonized fire-retardant particles falling off. As the open flame continues to burn, the multiple heat-expanding carbonized fire-retardant particles confined in the fireproof wrapping bag will eventually carbonize and expand to form a uniform, porous, and particle-free fire-resistant thermal insulation barrier layer. The uniform, porous, and particle-free fire-resistant thermal insulation barrier layer has an extremely low specific heat capacity, which is equal to the low thermal conductivity of the same aerogel level. The uniform, porous, and particle-free fire-resistant thermal insulation barrier layer can withstand direct burning of flames above 1300°C, effectively preventing the spread of flames and smoke in fires.

[0065] It can be understood that since general fireproof wrapping bags have a certain porosity, if the particle size of the heat-expanding carbonized fire-retardant particles is less than 1mm, it is easy to cause the problem of leakage of the heat-expanding carbonized fire-retardant bag. If the particle size of the heat-expanding carbonized fire-retardant particles is greater than 10mm, it is easy to cause the problem of the probability of damage of the fireproof wrapping bag due to the action of external force when the heat-expanding carbonized fire-retardant bag is installed. Therefore, in one embodiment, the particle size of the heat-expanding carbonized fire-retardant particles is 2mm-10mm to avoid the problem of leakage of the heat-expanding carbonized fire-retardant bag due to the heat-expanding carbonized fire-retardant particles being too small; at the same time, it also avoids the problem of a high probability of damage of the fireproof wrapping bag during installation due to the heat-expanding carbonized fire-retardant particles being too large.

[0066] In one embodiment, the fireproof wrapping bag is a glass fiber cloth bag. Specifically, the glass fiber cloth bag can be a glass fiber cloth bag sewn from alkali-free glass fiber cloth with a gram weight of 200g / ㎡.

[0067] In one embodiment, the fireproof wrapping bag is a fiberglass bag, and the thickness of the fiberglass bag is 0.18 mm.

[0068] In one of the embodiments, the filling amount of each of the heat-expanding carbonized fire-retardant particles in the fireproof wrapping bag is 75%-90%, so as to ensure that the total amount of expansion of all the heat-expanding carbonized fire-retardant particles filled in the fireproof wrapping bag is suitable for the unfilled amount of the fireproof wrapping bag. In this way, on the one hand, it is ensured that there is a certain movable gap between the multiple heat-expanding carbonized fire-retardant particles filled in the fireproof wrapping bag, so as to ensure that the heat-expanding carbonized fire-retardant bag can be better applied to different types and sizes of blocking structures with high humidity; on the other hand, it is ensured that the fireproof bag filled in the fireproof bag The multiple heat-expandable carbonized fire-retardant particles in the wrapping bag can quickly absorb heat and expand when encountering open flames, and carbonize on the fire-exposed surfaces of the multiple heat-expandable carbonized fire-retardant particles to form a uniform, porous, and particle-free fire-resistant heat-insulating barrier layer, thereby ensuring the fire-resistant integrity of the heat-expandable carbonized fire-retardant bag, and thus effectively preventing the spread of flames and smoke; on the other hand, it also avoids the problem of a high probability of damage caused by the excessive total expansion of all the heat-expandable carbonized fire-retardant particles filled in the fire-resistant wrapping bag after long-term burning of the open flame, which may cause the fire-resistant wrapping bag to burst due to the total expansion.

[0069] In one embodiment, the density of the heat-expanding carbonized fire-retardant particles is 130 kg / m 3 -210kg / m 3 To ensure that different densities of heat-expanding carbonized fire-retardant particles are used in combination with a preset filling amount, while ensuring that the carbonization can form a uniform, porous, and particle-free fire-resistant heat-insulating barrier layer, and also avoid the problem of the probability of damage caused by the fire-proof wrapping bag being squeezed out due to excessive expansion of the carbonization forming. In one embodiment, the density of the heat-expanding carbonized fire-retardant particles can be 130, 133, 140, 150, 155, 160, 165, 170, 182, 190, 193, 200, 204, 210, ..., etc., and the user can choose according to the actual situation.

[0070] In one of the embodiments, the initial low-temperature expansion of the heat-expandable carbonized fire-retardant particles is 150°C-300°C, so as to avoid the expansion of the heat-expandable carbonized fire-retardant particles at a lower temperature, which may cause the cables or non-metallic pipes wrapped therein to soften and decompose to produce gaps and fail to effectively prevent the spread of heat and high-temperature smoke. Specifically, in one of the embodiments, the initial low-temperature expansion of the heat-expandable carbonized fire-retardant particles can be 150°C, 200°C, 250°C, or 300°C, and the user can choose according to the actual situation.

[0071] In one embodiment, the expansion ratio of the heat-expandable carbonized fire-retardant particles is 200%-300%, so as to ensure that the heat-expandable carbonized fire-retardant particles have a high expansion rate, especially in combination with the filling amount of each of the heat-expandable carbonized fire-retardant particles in the fireproof wrapping bag. In this way, it is ensured that all the heat-expandable carbonized fire-retardant particles filled in the fireproof wrapping bag have high mobility, and it is also ensured that some of the heat-expandable carbonized fire-retardant particles filled in the fireproof wrapping bag can quickly absorb heat and expand when encountering open flames. With continuous heating, the fire-receiving surfaces of all the heat-expandable carbonized fire-retardant particles filled in the fireproof wrapping bag can be carbonized to form a uniform, porous, and particle-free fire-resistant heat-insulating barrier layer, thereby ensuring the fire-resistant integrity of the heat-expandable carbonized fire-retardant bag, and effectively preventing the spread of flames and smoke.

[0072] In one embodiment, the polyether polyol composition includes the following parts by mass: 90-100 parts of polyether polyol; 0.1-0.5 parts of catalyst; 0.2-1.0 parts of foaming agent; 0.5-3 parts of chain extender cross-linking agent; 0.1-2.5 parts of foam stabilizer; 1-3 parts of cell opener, so as to ensure that the prepared polyurethane resin layer can wrap the flame retardant, fire-proof functional filler, antioxidant, hydrolysis stabilizer, bactericidal and mildew-proof agent and smoke suppressant, so as to obtain a heat-expansion carbonized fire-retardant bag with high expansion, good fire-resistant integrity, the fire-proof wrapping bag does not melt at high temperature and has high flame retardant performance.

[0073] In one embodiment, the polyether polyol includes at least one of a high-activity polyether tetraol, a high-activity polyether triol and a polyether diol.

[0074] In one embodiment, the catalyst includes at least one of triethylenediamine, bis(dimethylaminoethyl) ether, N-methylmorphine, dibutyltin dilaurate, stannous octoate and an organic bismuth catalyst.

[0075] In one embodiment, the blowing agent includes at least one of deionized water, liquid carbon dioxide and dichloromethane.

[0076] In one embodiment, the chain extender crosslinking agent includes at least one of ethylene glycol, 1,4-butanediol, propylene oxide, trimethylolpropane, glycerol, xylitol, triethanolamine, and aromatic diamine.

[0077] In one embodiment, the foam stabilizer is polyether-modified silicone.

[0078] In one embodiment, the cell opener includes at least one of polyoxypropylene-oxyethylene copolyether and polyoxyalkylene-polysiloxane copolymer.

[0079] In one embodiment, the polyurethane curing agent includes at least one of polymethylene polyphenyl isocyanate and diphenylmethane diisocyanate, especially in combination with the use of a polyether polyol composition, so that the added polyether polyol composition and polyurethane curing agent can wrap the antioxidant, hydrolysis stabilizer, bactericidal and mildew-proof agent, smoke suppressant, flame retardant, and fire-proof functional filler, so as to ensure the preparation of a heat-expansion carbonized fire-retardant bag with high expansion, good fire-resistant integrity, and the fire-retardant bag does not melt at high temperature and has high flame retardant performance.

[0080] In one embodiment, the antioxidant includes at least one of butyl, octylated diphenylamine (antioxidant 5057), 3,5-di-tert-butyl-4-hydroxyphenylpropionate (antioxidant 1135) and tris(2,4-di-tert-butylphenyl) phosphite.

[0081] In one embodiment, the hydrolysis stabilizer includes at least one of glycerol triglycidyl ether (GE100), tetrakis triglycidyl ether (GE500) and polyethylene glycol diglycidyl ether (PEG 400-DGE).

[0082] In one embodiment, the bactericidal and mildew-proof agent includes at least one of isothiazolinone compounds, sodium pyrithione, zinc pyrithione, and 2,4,4'-trichloro-2'-hydroxy-diphenyl ether.

[0083] In one embodiment, the smoke suppressant includes ammonium molybdate tetrahydrate, and may also be independently selected from at least one of calcium carbonate, polysiloxane, chitosan and sulfonated graphene.

[0084] It can be understood that since ammonium molybdate tetrahydrate contains crystalline water, when ammonium molybdate tetrahydrate encounters an open flame, it can ensure that the added ammonium molybdate tetrahydrate can not only solve the smoke suppression problem, but also ensure that the ammonium molybdate tetrahydrate can release crystalline water during the heat absorption process, so that the released crystalline water can cool the fireproof wrapping bag and prevent the continuous burning of the fireproof wrapping bag, thereby protecting the fireproof wrapping bag from melting at a high temperature of about 1000°C. In particular, when used in conjunction with calcium carbonate, polysiloxane, chitosan and sulfonated graphene, it can achieve a good smoke suppression effect while ensuring that the added ammonium molybdate tetrahydrate can release crystalline water when burned by an open flame, so as to protect the fireproof wrapping bag from melting at a high temperature of about 1000°C.

[0085] In one embodiment, the flame retardant includes at least one of expandable graphite, ammonium polyphosphate, melamine, pentaerythritol, aluminum hydroxide and magnesium hydroxide.

[0086] In one embodiment, the fireproof functional filler includes at least one of potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate, and can also be independently selected from any several of mica powder, expanded vermiculite and perlite.

[0087] It can be understood that since potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate contain crystal water, while ensuring that the added potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate help to form a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer, it is also ensured that potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate can release crystal water during the heat absorption process, so that the released crystal water can cool the fireproof wrapping bag and prevent the continuous burning of the fireproof wrapping bag, thereby protecting the fireproof wrapping bag from melting at a high temperature of about 1000°C. In particular, when used in conjunction with mica powder, expanded vermiculite and perlite, it helps that multiple thermal expansion carbonization-formed fire-retardant particles will carbonize and expand when encountering an open flame of about 1000°C to form a uniform, porous, and particle-free fire-resistant and heat-insulating barrier layer. At the same time, it is also ensured that potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate can release crystal water when burned by an open flame, so as to protect the fireproof wrapping bag from melting at a high temperature of about 1000°C.

[0088] In one embodiment, the preparation of the polyurethane fireproof module comprises the following steps:

[0089] S101, mixing the polyether polyol composition, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler to obtain a mixture A.

[0090] It can be understood that if the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler are first mixed with the polyurethane curing agent, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler cannot be fully dispersed in the polyether polyol composition, thereby affecting the flame retardant properties of the polyurethane fireproof module. Therefore, in the present disclosure, the polyether polyol composition, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler are first mixed to ensure that the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler can be uniformly dispersed in the polyether polyol composition, which is beneficial to improve the flame retardant properties of the polyurethane fireproof module, thereby ensuring that the heat-expansion carbonization-molded fire-retardant particles with uniform particle size are finally prepared.

[0091] In one embodiment, the polyether polyol composition is first heated and stirred at a low speed using a reactor with a high-speed dispersing stirring paddle, the material temperature is controlled at 50-70°C, the stirring paddle speed range is 200rpm-300rpm, and the stirring is continued for 10min-20min; then, an antioxidant, a hydrolysis stabilizer, and a bactericidal and mildew-proof agent are added in sequence from the feeding port of the reactor, and low-speed stirring is maintained for 5min-10min; then, under stirring, a flame retardant, a smoke suppressant, and a fire-retardant functional filler are slowly added to the reactor in sequence, and after the addition is completed, the speed of the stirring paddle of the reactor is adjusted to 800rpm-1000rpm, and stirring is continued for 20min-30min; then, the speed is adjusted to 400rpm-500rpm, and the cold water system is turned on at the same time to reduce the material temperature in the reactor to below 40°C for standby use.

[0092] S102, mixing the mixture A with the polyurethane curing agent to obtain a mixture B; to ensure that the added polyurethane curing agent can undergo a cross-linking reaction with the polyether polyol composition to generate a polyurethane resin, so that the polyurethane resin can wrap the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler.

[0093] S103, aging the mixture B at room temperature to obtain the foamed polyurethane fireproof module, so as to ensure that the polyether polyol can undergo a sufficient and comprehensive cross-linking reaction with the polyurethane curing agent to completely encapsulate the antioxidant, the hydrolysis stabilizer, the bactericidal and mildewproof agent, the smoke suppressant, the flame retardant and the fireproof functional filler.

[0094] In one embodiment, the mixture B is injected into a polyurethane foaming box for room temperature aging.

[0095] In one embodiment, the room temperature aging time is 30 minutes to 60 minutes to ensure that the polyether polyol can undergo a sufficient and comprehensive cross-linking reaction with the polyurethane curing agent, thereby obtaining the foamed polyurethane fireproof module.

[0096] In one embodiment, the polyurethane fireproof module is crushed by a special crusher to obtain heat-expanding carbonized fire-retardant particles with a particle size of 2mm-10mm.

[0097] In one embodiment, the dedicated crusher is a flat knife crusher, and a screen plate with an aperture of 2mm-10mm is used for screening to ensure that the thermal expansion carbonization molded fire-retardant particles with a particle size of 2mm-10mm are obtained.

[0098] In one of the embodiments, the crushed heat-expanding carbonized fire-retardant particles with a particle size of 2mm-10mm are bagged and sealed according to a preset filling amount to obtain a heat-expanding carbonized fire-retardant bag.

[0099] The present disclosure also provides a blocking structure 10, such as Figure 5 , Figure 7 and Figure 8 As shown, it includes the heat expansion carbonization molded fire barrier bag 220 described in any of the above embodiments. It can be understood that since the heat expansion carbonization molded fire barrier bag 220 disclosed in the present invention has the characteristics of good moisture resistance, high expansion, good fire resistance integrity, the fireproof wrapping bag does not melt at high temperature, high flame retardant performance, dust-free installation, high installation flexibility, and the bag is not easy to break during installation, the heat expansion carbonization molded fire barrier bag 220 disclosed in the present invention can not only be well adapted to conventional blocking scenarios, such as the blocking of building wall holes 20, the blocking of building cable shafts, the blocking of fire doors, the blocking of cable tunnels, and the blocking of firewalls of trenches; it can also be well adapted to some blocking scenarios with relatively humid environments.

[0100] like Figure 5 and Figure 6 As shown, in one embodiment, the blocking structure 10 includes a first elastic fireproof module 100 and a heat expansion carbonization molded fire-blocking module 200, and the heat expansion carbonization molded fire-blocking module 200 is used to fill a hole 20 set in a building wall, and the heat expansion carbonization molded fire-blocking module 200 is correspondingly formed with a threading groove 210, and the first elastic fireproof module 100 is embedded in the threading groove 210, and the first elastic fireproof module 100 is formed with a threading hole, and the threading hole is convenient for the cable 931 to pass through, so that the first elastic fireproof module 100 can be sealed and filled in the gap between the inner wall of the threading groove 210 and the cable 931, and the heat expansion carbonization molded fire-blocking module 200 is formed by stacking a plurality of the heat expansion carbonization molded fire-blocking bags 220 to achieve effective blocking of the hole 20.

[0101] In one embodiment, a plurality of heat expansion carbonization-formed fire-retardant packages 220 are staggered and stacked in the holes 20 of the building wall.

[0102] In one embodiment, the staggered stacking method includes the following steps: first, the first row and the second row are stacked in two rows with the length of the heat expansion carbonization molded fire-retardant package 220 as the unit, and then the first heat expansion carbonization molded fire-retardant package 220 in the third row and the fourth row is stacked with the width of the heat expansion carbonization molded fire-retardant package 220 as the unit, and then the second one is stacked with the length of the heat expansion carbonization molded fire-retardant package 220, until the third row or the fourth row is stacked, and the first row, the second row, the third row and the fourth row are a cycle, and the above-mentioned cycle operation is repeated continuously until the holes 20 are completely filled. In this way, not only the firmness of the multiple heat expansion carbonization molded fire-retardant packages 220 is ensured, but also the stacking efficiency is improved.

[0103] It can be understood that when the stacking is completed, the gap between the last row of heat expansion carbonization molded fire retardant packs 220 and the hole 20 is often smaller than the thickness of the heat expansion carbonization molded fire retardant packs 220, that is, the remaining gap cannot accommodate the heat expansion carbonization molded fire retardant packs 220, resulting in the heat expansion carbonization molded fire retardant packs 220 of each layer being structurally unstable and having a poor blocking effect. Therefore, in the present disclosure, by adding a second elastic fireproof module 400, the second elastic fireproof module 400 is used to block the gap between the last row of heat expansion carbonization molded fire retardant packs 220 and the inner wall of the hole 20, so that not only the stability of the connection of the heat expansion carbonization molded fire retardant packs 220 of each layer is ensured, but also the blocking effect is improved.

[0104] like Figure 5 As shown, in one embodiment, the blocking structure 10 also includes a cable trough box 930, which is arranged between the first elastic fireproof module 100 and the thermal expansion carbonization molded fire-blocking module 200, that is, the cable trough box 930 is embedded in the wire threading trough 210, and the first elastic fireproof module 100 is embedded in the cable trough box 930. The first elastic fireproof module 100 is formed with a plurality of wire holes 110, and each wire hole 110 is arranged one-to-one with each cable 931, so that the additional cable trough box 930 can realize better collection, induction and classification of multiple cables 931 for subsequent rapid installation.

[0105] like Figure 7 As shown, in one embodiment, the blocking structure 10 is applied in a cable shaft. The blocking structure 10 includes a metal composite fireproof board and a heat expansion carbonization molded fireproof module 200. A hole 20 is formed between the walls of the cable shaft. A first accommodating cavity and a second accommodating cavity connected to each other are formed in the hole 20. The first accommodating cavity is used for the cable trough box to pass through. The metal composite fireproof board is arranged at the bottom of the second accommodating cavity and forms a blocking cavity with the inner wall of the second accommodating cavity. The heat expansion carbonization molded fireproof module 200 is embedded in the blocking cavity to achieve blocking of the hole 20 of the cable shaft.

[0106] In one of the embodiments, a first elastic fireproof module 100 is provided in the cable trough box, and a plurality of wire holes 110 are correspondingly provided in the first elastic fireproof module 100. Each wire hole 110 is provided in one-to-one correspondence with each cable 931 to realize the cable hole setting, and the additional first elastic fireproof module 100 realizes effective flame-retardant sealing for multiple cables 931.

[0107] like Figure 5 , Figure 7 and Figure 8 As shown, in one embodiment, the sealing structure 10 also includes a second elastic fireproof module 400, which is used to seal and fill the remaining gap between the expansion carbonization molded fire-blocking module and the inner wall of the second accommodating cavity, so that the added second elastic fireproof module 400 can improve the stacking stability of multiple heat expansion carbonization molded fire-blocking packages 220 and improve the better sealing of the hole 20.

[0108] In one embodiment, the second elastic fireproof module 400 is an integrally formed structure, and the user can cut the second elastic fireproof module 400 according to the on-site stacking conditions, thereby effectively avoiding the problem of a high probability of omission of traditional fire-retardant packages due to the need to carry a variety of small-sized fire-retardant packages at the same time; and the integrally formed second elastic fireproof module 400 is convenient for users to assemble quickly, reducing the number of stacking times to improve assembly efficiency, and because the second elastic fireproof module 400 has good elasticity, it can be well adapted to the sealing of various gaps of different sizes, thereby improving the adaptability of the thermal expansion carbonization molded sealing structure 10.

[0109] It can be understood that for some relatively high humidity blocking structures 10, such as the blocking of cable tunnels and the fire wall blocking structures 10 of trenches, not only are the humidity high but also the types and sizes of the holes 20 are relatively diverse, while the moisture resistance and fire resistance integrity of the traditional fire-blocking bag are poor, and it cannot be well applied to the blocking structure 10 with relatively high humidity. Therefore, in the present disclosure, since the heat-expanded carbonized fire-blocking bag 220 is formed by wrapping the antioxidant, the hydrolysis stabilizer, the bactericidal mildew inhibitor, the smoke suppressant, the flame retardant and the fire-proof functional filler with polyurethane resin, the heat-expanded carbonized fire-blocking bag 220 has the characteristics of good moisture resistance, high expansion, good fire resistance integrity, the fire-proof wrapping bag does not melt at high temperature, high flame retardant performance, dust-free installation, high installation flexibility, and the bag is not easy to break during installation, so as to be better suitable for the application of different types and sizes of blocking structures 10 with high humidity.

[0110] It can also be understood that, in general, the number of cables threaded in the firewall of the cable tunnel or channel is relatively large relative to the hole 20 of the building wall, resulting in a relatively large hole 20 in the cable tunnel or channel. If the equipment is not purchased in place and the project is in urgent need of operation, the number of cables threaded in the early stage is small, resulting in a larger actual blocking space. Since the blocking space is large and there is no support in the middle, if multiple heat expansion carbonization-molded fire-blocking packages 220 are directly stacked, the middle part with a larger blocking space is prone to collapse. In addition, since the blocking space is large, it is necessary to stack the fire-blocking packages one by one, which is not only time-consuming and labor-consuming, but also causes the problem of low efficiency of on-site assembly.

[0111] Therefore, if Figure 8 and Fig. 9 As shown, in one embodiment, the blocking structure 10 is applied in a cable tunnel or a channel. The blocking structure 10 includes a fireproof installation frame 800, a fireproof support frame 900, a first metal composite fireproof board 600, a second metal composite fireproof board 700, a thermal expansion carbonization molded fireproof module 200 and a first elastic fireproof module 100; the fireproof installation frame 800 is used to be detachably connected to the inner wall of the hole 20 of the firewall of the cable tunnel or channel; the first metal composite fireproof board 600 and the second metal composite fireproof board 700 are respectively arranged on both sides of the fireproof installation frame 800, and together form an installation cavity 810, the fireproof support frame 900 is arranged in the middle of the installation cavity 810, and is connected to the fireproof installation frame 800. Then, the heat expansion carbonization molded fire-blocking module 200 is clamped in the installation cavity 810, and the heat expansion carbonization molded fire-blocking module 200 is formed by stacking multiple heat expansion carbonization molded fire-blocking packages 220, and the fire-proof support frame 900 is used to support the force of part of the heat expansion carbonization molded fire-blocking package 220; the first metal composite fireproof board 600 and the second metal composite fireproof board 700 are correspondingly formed with a wire threading groove 210, and the first elastic fireproof module 100 is embedded in the wire threading groove 210, and the first elastic fireproof module 100 is used to seal and fill the gap between the inner wall of the wire threading groove 210 and the cable 931.

[0112] It can be understood that since the fireproof installation frame 800 is used to be detachably connected to the inner wall of the hole 20, it is convenient for the user to disassemble and assemble; and since the first metal composite fireproof board 600 and the second metal composite fireproof board 700 are respectively arranged on both sides of the fireproof installation frame 800 and jointly form an installation cavity 810, the heat expansion carbonization molded fireproof module 200 is clamped in the installation cavity 810, so that the first metal composite fireproof board 600 and the second metal composite fireproof board 700 on both sides can clamp and fix the heat expansion carbonization molded fireproof module 200, and since the first metal composite fireproof board 600 and the second metal composite fireproof board 700 are correspondingly formed with a threading groove 210, the first elastic The fireproof module 100 is embedded in the wire threading groove 210, so that the first metal composite fireproof board 600, the second metal composite fireproof board 700, the heat expansion carbonization molded fireproof module 200, the fireproof installation frame 800 and the first elastic fireproof module 100 can be used as a whole, which is convenient for the user to pre-assemble and fix the first metal composite fireproof board 600, the second metal composite fireproof board 700, the heat expansion carbonization molded fireproof module 200, the fireproof installation frame 800 and the first elastic fireproof module 100, so that the user can quickly install them on site, thereby improving the effect of on-site assembly and effectively avoiding the problem of low efficiency of on-site assembly caused by stacking fireproof packages one by one during traditional on-site assembly.

[0113] It is also understandable that Figure 8 As shown, since the fireproof support frame 900 is arranged in the middle of the installation cavity 810 and is connected to the fireproof installation frame 800, the added fireproof support frame 900 can better support the force of part of the heat expansion carbonization molded fire-retardant package 220, and effectively avoid the problem of collapse in the middle part where the sealed space is larger.

[0114] It can also be understood that the added fireproof support frame 900 can play a certain limiting role and correct flatness role on the stacked heat expansion carbonization molded fire-retardant packages 220, thereby better ensuring the flatness and sealing effect of the heat expansion carbonization molded fire-retardant module 200, and effectively avoiding the problem that the heat expansion carbonization molded fire-retardant package 220 cannot better control the flatness of the final stack due to the active gaps between the heat expansion carbonization molded fire-retardant particles, resulting in poor sealing effect.

[0115] like Figure 8As shown, in one embodiment, the fireproof support frame 900 includes a main frame 910 and a plurality of cross supports 920. The main frame 910 is vertically arranged in the middle of the fireproof installation frame 800, and the plurality of cross supports 920 are spaced apart along the length direction of the main frame 910 to ensure that the additional main frame 910 and the plurality of cross supports 920 can provide better correction of flatness and support for the stacked plurality of heat expansion carbonization-formed fire-retardant packs 220, so as to achieve effective sealing of the larger space blocking structure 10, while also avoiding the problem of collapse in the middle portion of the larger blocked space.

[0116] In one of the embodiments, a first mounting groove and a plurality of second mounting grooves are correspondingly formed in the thermal expansion carbonization molded fire-blocking module 200 , wherein the first mounting groove is used to accommodate the main frame 910 ; and the second mounting groove is used to accommodate the cross support 920 .

[0117] In one embodiment, the first end of the cross bracket 920 is connected to the main frame 910, and the second end of the cross bracket 920 is connected to the fireproof mounting frame 800, thereby enhancing the connection strength of the cross bracket 920 to ensure that multiple heat expansion carbonization molded fire retardant packages 220 are not prone to collapse when stacked on the cross bracket 920, and to ensure that the cross bracket 920 can provide better correction of flatness and support for the stacked multiple heat expansion carbonization molded fire retardant packages 220.

[0118] In this embodiment, since the cross bracket 920 is made of metal fireproof material, the cross bracket 920 itself has better flatness, so as to ensure that the cross bracket 920 can provide better flatness correction for the stacked heat expansion carbonization formed fire barrier packs 220, and effectively avoid the phenomenon of larger space blocking structure 10 collapsing due to excessive stacking quantity.

[0119] like Fig. 9 As shown, in one embodiment, the wire threading groove 210 includes a first wire threading sub-groove 211, a second wire threading sub-groove 212 and a third wire threading sub-groove 213, the thermal expansion carbonization molded fire-proof module 200 is provided with a first wire threading sub-groove 211, the first metal composite fireproof board 600 is provided with a second wire threading sub-groove 212 at a position corresponding to the first wire threading sub-groove 211, the second metal composite fireproof board 700 is provided with a third wire threading sub-groove 213 at a position corresponding to the first wire threading sub-groove 211, and the first elastic fireproof module 100 is sequentially embedded in the first wire threading sub-groove 211, the second wire threading sub-groove 212 and the third wire threading sub-groove 213, so that the first elastic fireproof module 100 can seal and fill the gap between the inner wall of the wire threading groove 210 and the cable 931, thereby ensuring the sealing effect.

[0120] In one of the embodiments, the length of the first elastic fireproof module 100 is equal to the sum of the lengths of the first threading sub-groove 211, the second threading sub-groove 212 and the third threading sub-groove 213, so that when the first elastic fireproof module 100 is embedded in the first threading sub-groove 211, the second threading sub-groove 212 and the third threading sub-groove 213, the two ends of the first elastic fireproof module 100 will not be exposed. In this way, while saving the material of the first elastic fireproof module 100, it also ensures effective sealing and blocking between the first elastic fireproof module 100 and the first metal composite fireproof board 600, the second metal composite fireproof board 700, the thermal expansion carbonization molded fireproof module 200, and the cable 931.

[0121] Some specific examples are given below, and if % is mentioned, it means percentage by weight. It should be noted that the following examples do not exhaust all possible situations, and the materials used in the following examples can be obtained from commercial sources unless otherwise specified.

[0122] Table 1 Recipe

[0123]

[0124]

[0125] Table 2 Formulation of polyether polyol composition

[0126]

[0127] The formulations of Examples 1 to 3 and Comparative Examples 1 to 2 in Table 1 were prepared according to the following steps to obtain a heat expansion carbonization-molded fire-retardant package:

[0128] Step 1: First, use a reactor with a high-speed dispersing stirring paddle to heat and stir the polyether polyol composition at a low speed, control the material temperature at 50-70°C, and the stirring paddle speed range is 200rpm-300rpm, and continue for 10 minutes; Step 2: After completing step 1, add an antioxidant, a hydrolysis stabilizer, and a bactericidal and mildew-proof agent from the feeding port of the reactor in sequence, and keep stirring at a low speed for 5 minutes;

[0129] Step 3: After completing step 2, slowly add the flame retardant, smoke suppressant, and fire-retardant filler into the reactor in sequence under stirring. After the addition is completed, adjust the speed of the stirring paddle of the reactor to 800 rpm and continue stirring for 30 minutes; then, adjust the speed to 400 rpm, and turn on the cold water system at the same time to reduce the material temperature in the reactor to below 40°C, and obtain a mixture A for standby use;

[0130] Step 4: Mix the mixture A prepared in step 3 with the polyurethane curing agent and stir them evenly to obtain a mixture B;

[0131] Step 5: injecting the mixture B into a polyurethane foaming box, and curing and molding it by cold curing process at room temperature for 30 minutes to obtain the foamed polyurethane fireproof module;

[0132] Step 6: Place the foamed polyurethane fireproof module in a flat knife crusher and use a sieve plate with a pore size of 5 mm to prepare heat-expanded carbonized fire-retardant particles with a uniform particle size of 5 mm;

[0133] Step 7: The heat-expanding carbonized fire-retardant particles prepared in step 6 are loaded into a glass fiber bag with a weight of 200 g / ㎡ and a thickness of 0.18 mm at a preset filling amount of 80%, and the bag is sealed by sewing to obtain a new type of heat-expanding carbonized fire-retardant bag.

[0134] Example 4

[0135] The difference from Example 1 is that the sieve plate with a pore size of 5 mm in step six is ​​replaced with a sieve plate with a pore size of 10 mm to prepare 10.0 mm uniform thermal expansion carbonization molded fire-retardant particles, and the rest remains unchanged.

[0136] Example 5

[0137] The difference from Example 1 is that the preset filling amount in step seven is set to 90%, and the rest remains unchanged.

[0138] Comparative Example 3

[0139] The difference from Example 1 is that the sieve plate with a pore size of 5 mm in step six is ​​replaced with a sieve plate with a pore size of 1 mm to prepare 1 mm uniform thermal expansion carbonization molded fire-retardant particles, and the rest remains unchanged.

[0140] Comparative Example 4

[0141] The difference from Example 1 is that the sieve plate with a pore size of 5 mm in step six is ​​replaced with a sieve plate with a pore size of 15 mm to prepare 15.0 mm uniform thermal expansion carbonization molded fire-retardant particles, and the rest remains unchanged.

[0142] Comparative Example 5

[0143] The difference from Example 1 is that the 80% preset filling amount in step seven is replaced with 70% and the rest remains unchanged.

[0144] Comparative Example 6

[0145] The difference from Example 1 is that the 80% preset filling amount in step seven is replaced with 100% preset filling amount, and the rest remains unchanged.

[0146] The heat expansion carbonization molded fire-retardant packages prepared in the above Examples 1 to 5 and Comparative Examples 1 to 6 were tested for moisture resistance, expansion performance, and fire resistance integrity to obtain the experimental data in Table 3:

[0147] Among them, the water resistance detection method: in accordance with the water resistance test method 6.1.5.2.1 in the "Fireproof Sealing Materials" GB 23864-2023 standard: soak the prepared and cured sample in tap water, keep the temperature at 20℃±5℃, observe once every 24 hours, take out after the specified time, and observe whether the sample is swollen or cracked, whether the package of the fire barrier package is intact, whether there is any damage, and whether there is any obvious change in the internal material.

[0148] Expansion performance testing method: After mixing the internal materials of the fire-retardant package evenly, put them into three steel containers with an inner diameter of φ50mm and a height of 50mm respectively. The loose stacking thickness of the internal materials of the fire-retardant package in the steel container is 10mm. Use a steel ruler to measure the height of the sample before expansion. Then, place the steel container containing the sample in a resistance furnace at a temperature of 540C±10℃ and take it out after keeping the temperature constant for 30 minutes. After sufficient cooling, measure the height of the sample after expansion (if the surface of the sample after expansion is uneven, test multiple points and take the average value). The ratio of the height of the sample after expansion to the height before expansion is the expansion multiple of the material. The expansion performance is expressed as the arithmetic mean of the expansion multiples of the three samples, accurate to the first decimal place.

[0149] Fire resistance integrity testing method: Use a butane spray gun to burn directly, adjust the spray gun flame length to about 15cm, aim the flame at the middle of the sample fire barrier package at a distance of 10cm, continue burning for 5 minutes, and observe the structural integrity of the sample fire barrier package.

[0150] Table 3 Experimental data

[0151]

[0152]

[0153]

[0154] It can be seen from Table 3 above that the polyether polyol composition and polyurethane curing agent used in Examples 1 to 5 can wrap the antioxidant, hydrolysis stabilizer, bactericidal and mildew-proof agent, smoke suppressant, flame retardant and fire-proof functional filler, so as to ensure that the prepared heat-expanding carbonized fire-retardant particles have the characteristics of good moisture resistance, high expansion, good fire-resistant integrity, high flame retardant performance, and dust-free installation. At the same time, with the use of a preset filling amount, it is ensured that a plurality of heat-expanding carbonized fire-retardant particles can be carbonized to form a uniform porous fire-resistant heat-insulating barrier layer without particle scattering after burning with an open flame for 5 minutes. For details, please refer to Fig.10; In addition, since the heat-expanding carbonized fire-retardant particles use materials containing crystal water, such as ammonium molybdate tetrahydrate, potassium aluminum sulfate dodecahydrate, and ferrous sulfate heptahydrate, the heat-expanding carbonized fire-retardant particles will release crystal water when burned by open flames, so that the released crystal water can cool the fireproof wrapping bag and prevent the fireproof wrapping bag from continuing to burn, thereby protecting the fireproof wrapping bag from melting at a high temperature of about 1000°C. For details, please refer to Figure 4 and Fig.10 , making the comprehensive indexes of Examples 1 to 5 significantly better than those of Comparative Examples 1 to 5. Among them, the comprehensive index of Example 1 is the best.

[0155] In the application of the actual sealing structure, when the heat-expanding carbonized fire-retardant particles are less than 2.0 mm (such as in comparative example 3), the heat-expanding carbonized fire-retardant bags are prone to leakage due to the extrusion of external forces; when the heat-expanding carbonized fire-retardant particles are greater than 15.0 mm (such as in comparative example 4), the heat-expanding carbonized fire-retardant bags are prone to unevenness and large stacking gaps during the carbonization process, which makes it impossible to fit well with the fireproof wrapping bag, resulting in slight melting and damage of the fireproof wrapping bag, resulting in poor sealing of the sealing structure. Controlling the heat-expanding carbonized fire-retardant particles to 2.0 mm-10.0 mm can effectively solve the problem of leakage during on-site installation, and at the same time can reduce the problem of unevenness of the thermal insulation barrier layer after carbonization expansion to a certain extent, so as to ensure the fire resistance integrity of the heat-expanding carbonized fire-retardant bag.

[0156] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A fire-retardant bag formed by thermal expansion and carbonization, comprising a fire-retardant wrapping bag and a plurality of fire-retardant particles filled in the fire-retardant wrapping bag, characterized in that: The fire-retardant particles are heat-expanding carbonized fire-retardant particles, which are obtained by crushing polyurethane fire-retardant modules; The polyurethane fireproof module is prepared by the following materials in parts by mass: When in use, each of the heat-expanding carbonized fire-retardant particles expands upon encountering an open flame to form a fire-resistant heat-insulating barrier layer without particle scattering.

2. The heat expansion carbonization formed fire barrier package according to claim 1, characterized in that: The particle size of the heat expansion carbonization formed fire retardant particles is 2mm-10mm.

3. The heat expansion carbonization formed fire retardant package according to claim 1, characterized in that: The initial low-temperature expansion of the thermal expansion carbonization-molded fire-retardant particles is 150°C-300°C.

4. The heat expansion carbonization formed fire barrier package according to claim 1, characterized in that: The expansion ratio of the heat expansion carbonization-molded fire-proof and flame-retardant particles is 200%-300%.

5. The heat expansion carbonization formed fire retardant package according to claim 1, characterized in that: The polyether polyol composition comprises the following parts by mass:

6. The heat expansion carbonization formed fire retardant package according to claim 5, characterized in that: The polyether polyol comprises at least one of a high-activity polyether tetraol, a high-activity polyether triol and a polyether diol.

7. The heat expansion carbonization formed fire retardant package according to claim 1, characterized in that: The polyurethane curing agent comprises at least one of polymethylene polyphenyl isocyanate and diphenylmethane diisocyanate; and / or, The antioxidant includes at least one of butyl, octylated diphenylamine (antioxidant 5057), 3,5-di-tert-butyl-4-hydroxyphenylpropionate (antioxidant 1135) and tris(2,4-di-tert-butylphenyl) phosphite; and / or, The hydrolysis stabilizer includes at least one of glycerol triglycidyl ether (GE100), tetrakis triglycidyl ether (GE500) and polyethylene glycol diglycidyl ether (PEG 400-DGE); and / or, The bactericidal and mildew-proofing agent comprises at least one of isothiazolinone compounds, sodium pyrithione, zinc pyrithione, and 2,4,4'-trichloro-2'-hydroxy-diphenyl ether; and / or, The smoke suppressant includes ammonium molybdate tetrahydrate, and can also be independently selected from at least one of calcium carbonate, polysiloxane, chitosan and sulfonated graphene; and / or, The flame retardant comprises at least one of expandable graphite, ammonium polyphosphate, melamine, pentaerythritol, aluminum hydroxide and magnesium hydroxide; and / or, The fireproof functional filler includes at least one of potassium aluminum sulfate dodecahydrate and ferrous sulfate heptahydrate, and can also be independently selected from any several of mica powder, expanded vermiculite and perlite.

8. The heat expansion carbonization formed fire retardant package according to claim 1, characterized in that: The preparation of the polyurethane fireproof module comprises the following steps: The polyether polyol composition, the antioxidant, the hydrolysis stabilizer, the bactericidal and mildew-proof agent, the smoke suppressant, the flame retardant and the fire-proof functional filler are mixed to obtain a mixture A; Mixing the mixture A with the polyurethane curing agent to obtain a mixture B; The mixture B is aged at room temperature to obtain the foamed polyurethane fireproof module.

9. The heat expansion carbonization formed fire retardant package according to claim 8, characterized in that: The room temperature aging time is 30min-60min.

10. A blocking structure, characterized in that: A fire-retardant package formed by heat expansion and carbonization comprising any one of claims 1-9.

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