A kind of heat-insulating fabric containing component and its preparation method and application

Abstract

The present invention provides a component-containing heat-insulating fabric and a preparation method and application thereof, wherein the component-containing heat-insulating fabric comprises an outer heat-proof layer and an inner heat-insulating layer; the outer heat-proof layer is a quartz fiber fabric layer, and the inner heat-insulating layer comprises a carbon fiber fabric layer, a first needle-punched fabric layer, and a second needle-punched fabric layer in sequence; the first needle-punched fabric layer and the second needle-punched fabric layer contain a heat-insulating coating; and the heat-insulating coating contains a heat-insulating component. The present invention effectively improves the interlayer connection strength of the high-thickness needle-punched fabric and the heat-insulating performance of the inner layer by adding a heat-insulating component to the inner heat-insulating layer and connecting it with the quartz fiber fabric layer, and the design of the carbon fiber mesh cloth in the thickness direction further improves the overall uniformity and stability of the fabric.

Description

Technical Field

[0001] The invention relates to the technical field of three-dimensional fabric design, and in particular to a component-containing heat-insulating fabric and a preparation method and application thereof. Background Art

[0002] Thermal insulation fabric is designed through integrated heat protection and insulation to achieve an integrated connection between an anti-oxidation and ablation outer layer and a high-toughness thermal insulation matrix. It is usually composed of a surface high-density thermal insulation fabric, an inner low-density thermal insulation fabric and an intermediate transition layer of fabric. It has excellent properties such as light weight, corrosion resistance, ablation resistance, and erosion resistance, and is often used in aerospace thermal protection structures.

[0003] At present, the thermal insulation fabric is mainly made by needle punching process, that is, the layers of thermal insulation fabric are connected by Z-direction fibers drawn out by needle punching process. Such connection is weak for thick fabrics and is prone to stratification, thus affecting the overall stability of the fabric. In addition, the existing thermal insulation fabric is a single fiber structure, which is difficult to meet the stringent temperature drop requirements when applied to aerospace thermal protection structures. Therefore, it is often necessary to add thermal insulation medium in the later compounding to further improve the overall thermal insulation performance of the composite material. This preparation method is easily limited by the size of the mesh pores and the uniformity of the pore distribution in the previous process and the accuracy of the subsequent compounding process, which increases the complexity and uncertainty of the subsequent process, and cannot guarantee the yield of the final product, which is not conducive to sustainable development.

[0004] In view of this, it is necessary to improve the above problems through new structure and process design. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a component-containing heat-insulating fabric and a preparation method and application thereof. It is woven and connected by quartz fibers, and the inner insulation layer contains heat-insulating components. It not only has excellent heat-insulating performance, but also has high connection strength between the inner insulation layer and the outer heat-proof layer, and has broad application prospects.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a component-containing heat-insulating fabric, wherein the component-containing heat-insulating fabric comprises an outer heat-proof layer and an inner heat-insulating layer; the outer heat-proof layer is a quartz fiber fabric layer, and the inner heat-insulating layer comprises a carbon fiber fabric layer, a first needle-punched fabric layer and a second needle-punched fabric layer in sequence; the first needle-punched fabric layer and the second needle-punched fabric layer contain a heat-insulating coating; the heat-insulating coating contains a heat-insulating component; the carbon fiber fabric layer in the inner heat-insulating layer is connected to the outer heat-proof layer by quartz fiber weaving.

[0008] The component-containing heat-insulating fabric provided by the present invention, on the one hand, is designed with a heat-insulating coating in the inner heat-insulating layer, which can not only improve the heat-insulating effect, but also improve the bonding strength inside the heat-insulating layer; on the other hand, the outer heat-proof layer is designed as a quartz fiber fabric layer, and is connected to the carbon fiber fabric layer by quartz fiber weaving, thereby improving the connection strength of the upper end.

[0009] Preferably, the outer heat protection layer is connected to the first needle-punched fabric layer and the second needle-punched fabric layer by a needle-punching process.

[0010] The present invention adopts a needle punching process when the first needle punched fabric layer and the second needle punched fabric layer are connected to the outer heat protection layer, which can improve the uniformity of the fabric.

[0011] Preferably, the inner heat insulation layer comprises a carbon fiber fabric layer, a first needle-punched fabric layer and a second needle-punched fabric layer which are stacked in sequence, and the outer heat protection layer is arranged on the side of the stack, that is, the outer heat protection layer is in contact with the carbon fiber fabric layer, the first needle-punched fabric layer and the second needle-punched fabric layer at the same time.

[0012] Preferably, the thickness of the outer heat protection layer is 2 to 10 mm, for example, it can be 2 mm, 2.9 mm, 3.8 mm, 4.7 mm, 5.6 mm, 6.5 mm, 7.4 mm, 8.3 mm, 9.2 mm or 10 mm.

[0013] Preferably, the density of the outer heat protection layer is 1-1.5 g / cm 3 , for example, it can be 1.0 g / cm 3 , 1.06g / cm 3 , 1.12g / cm 3 , 1.17g / cm 3 , 1.23g / cm 3 , 1.28g / cm 3 , 1.34g / cm 3 , 1.39g / cm 3 , 1.45g / cm 3 or 1.5g / cm 3 wait.

[0014] Preferably, the quartz fiber fabric layer is a 2.5D quartz fiber fabric layer.

[0015] Preferably, the thickness of the carbon fiber fabric layer, the first needle-punched fabric layer and the second needle-punched fabric layer is independently 20-30 mm, for example, 20 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm.

[0016] Preferably, the carbon fiber fabric layer is a 2.5D carbon fiber fabric layer.

[0017] Preferably, the density of the carbon fiber fabric layer is 0.8-1.2 g / cm 3 , for example, it can be 0.8 g / cm 3 , 0.85g / cm 3 , 0.89g / cm 3 、0.94g / cm 3 、0.98g / cm 3 , 1.03g / cm 3 , 1.07g / cm 3 , 1.12g / cm 3 , 1.16g / cm 3 or 1.2g / cm 3 wait.

[0018] Preferably, the density of the first needle-punched fabric layer is 0.3-0.7 g / cm 3 , for example, it can be 0.3 g / cm 3 , 0.35g / cm 3 , 0.39g / cm 3 , 0.44g / cm 3 , 0.48g / cm 3 , 0.53g / cm 3 , 0.57g / cm 3 , 0.62g / cm 3 , 0.66g / cm 3 or 0.7g / cm 3 wait.

[0019] Preferably, the density of the second needle-punched fabric layer is 0.1-0.3 g / cm 3 , for example, it can be 0.1 g / cm 3 , 0.13g / cm 3 , 0.15g / cm 3 , 0.17g / cm 3 , 0.19g / cm3, 0.22g / cm 3 , 0.24g / cm 3 , 0.26g / cm 3 , 0.28g / cm 3 or 0.3g / cm 3 wait.

[0020] Preferably, the structural unit layers of the first needle-punched fabric layer and the second needle-punched fabric layer are each independently one layer of carbon fiber mesh cloth composited with three layers of quartz fiber mesh.

[0021] The present invention preferably arranges a carbon fiber mesh cloth in the thickness direction between the first needle-punched fabric layer and the second needle-punched fabric layer, which is matched with the quartz fiber mesh, effectively improving the interlayer connection strength of the high-thickness needle-punched fabric and the thermal insulation performance of the inner layer, and can improve the overall uniformity and stability of the fabric.

[0022] Preferably, a heat-insulating coating is provided between each layer of the three layers of quartz fiber webs.

[0023] Since the thickness of the first needle-punched fabric layer and the second needle-punched fabric layer is relatively thick, it is easy to cause delamination problems if only the needle-punching method is used for interlayer connection, and in order to further improve the thermal insulation performance of the inner layer of the fabric, a layer of thermal insulation coating is coated between each layer of the three layers of quartz fiber mesh. That is, the thermal insulation coating in the present invention can not only improve the effect of the adhesive and improve the interlayer bonding strength, but also has an excellent thermal insulation effect, further improving the thermal insulation performance.

[0024] Preferably, the thermal insulation coating accounts for 10-20% of the total weight of the inner thermal insulation layer, for example, it may be 10%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20%.

[0025] The present invention further preferably has a weight percentage of the thermal insulation coating within the above range, which has better thermal insulation effect, interlayer strength and fabric flexibility.

[0026] Preferably, the thermal insulation coating further comprises resin in addition to the thermal insulation component.

[0027] Preferably, the weight ratio of the thermal insulation component to the resin is (1.2-2):1, for example, it can be 1.2:1, 1.29:1, 1.38:1, 1.47:1, 1.56:1, 1.65:1, 1.74:1, 1.83:1, 1.92:1 or 2:1, etc.

[0028] The preferred weight ratio of the heat insulating component to the resin in the present invention is (1.2-2):1, which can better improve the heat insulating effect and the interlayer connection effect, and ultimately the overall performance of the fabric is better.

[0029] The heat-insulating coating of the present invention is formed by mixing the heat-insulating component and the resin in alcohol in a weight ratio of (1.2-2):1, coating, and then volatilizing the alcohol. The purity of the alcohol is ≥95%.

[0030] Preferably, the thermal insulation component comprises nano-scale ceramic powder.

[0031] Preferably, the nano-scale ceramic powder comprises any one or a combination of at least two of hafnium, zirconium, molybdenum, titanium, tantalum silicide, boride, carbide, silicon oxide, hydrous magnesium silicate, boric acid or boric acid ester, wherein typical but non-limiting combinations are a combination of hafnium and zirconium, a combination of molybdenum and zirconium, a combination of hafnium and molybdenum, a combination of tantalum silicide and zirconium, a combination of hafnium and titanium, a combination of boride and zirconium, a combination of hafnium and carbide, a combination of hydrous magnesium silicate and silicon oxide, a combination of boric acid and silicon oxide, a combination of hydrous magnesium silicate and boric acid, and a combination of boric acid ester and silicon oxide.

[0032] Preferably, the resin comprises any one of phenolic resin, modified phenolic resin, silicone resin or modified silicone resin, or a combination of at least two thereof, wherein typical but non-limiting combinations are a combination of phenolic resin and modified phenolic resin, a combination of silicone resin and modified phenolic resin, a combination of phenolic resin and silicone resin, and a combination of modified silicone resin and modified phenolic resin.

[0033] There is no particular limitation on the modified phenolic resin and modified silicone resin in the present invention, and any modified phenolic resin and modified silicone resin material that can be used for thermal insulation coating and is well known to those skilled in the art can be used.

[0034] In a second aspect, the present invention provides a method for preparing the component-containing heat-insulating fabric according to the first aspect, the preparation method comprising:

[0035] The heat insulation components and the resin are mixed in an organic solvent to obtain a heat insulation coating suspension.

[0036] After laying three layers of quartz fiber mesh according to the ratio of one layer of quartz fiber mesh to one layer of thermal insulation coating suspension, a layer of carbon fiber mesh cloth is laid to obtain a structural unit layer, and then the structural unit layer is stacked and laid and needle-punched layer by layer to form a second needle-punched fabric layer and a first needle-punched fabric layer; a carbon fiber fabric layer is woven on the upper part of the first needle-punched fabric layer to form an inner thermal insulation layer;

[0037] The quartz fiber fabric layer as the outer heat-proof layer is connected to the inner heat-insulating layer to obtain the component-containing heat-insulating fabric.

[0038] The preparation method of the component-containing heat-insulating fabric provided by the present invention has a simple process, can prepare an inner heat-insulating layer with excellent performance and high internal bonding strength, and can better realize the efficient connection between the quartz fiber fabric layer of the outer heat-proof layer and the inner heat-insulating layer, and has broad application prospects.

[0039] Preferably, the quartz fiber fabric layer of the outer heat protection layer and the carbon fiber fabric layer of the inner heat insulation layer are woven and connected by using quartz fibers.

[0040] Preferably, the first needle-punched fabric layer and the second needle-punched fabric layer are connected to the outer heat protection layer by using a needle-punching process.

[0041] The quartz fiber fabric layer and the carbon fiber fabric layer of the outer heat protection layer of the present invention are preferably woven and connected by quartz fiber, which can improve the bonding strength of the upper end portion, while the first needle-punched fabric layer and the second needle-punched fabric layer in the inner heat insulation layer are connected to the outer heat protection layer by a needle-punching process and the bonding strength is improved by adjusting the needle-punching density, thereby ultimately making the overall comprehensive performance of the component-containing heat-insulating fabric better.

[0042] Preferably, the needle punching density of the first needle punched fabric layer is 25 to 40 needles / cm 2 , for example, it can be 25 needles / cm 2 , 27 needles / cm 2 , 29 needles / cm 2 , 30 needles / cm 2 , 32 needles / cm 2 , 34 needles / cm 2 , 35 needles / cm 2 , 37 needles / cm 2 , 39 needles / cm 2 or 40 needles / cm 2 wait.

[0043] Preferably, the needle punching density of the second needle punched fabric layer is 10 to 20 needles / cm 2 , for example, 10 needles / cm 2 , 12 needles / cm 2 , 13 needles / cm 2 , 14 needles / cm 2 , 15 needles / cm 2 , 16 needles / cm 2 , 17 needles / cm 2 , 18 needles / cm 2 , 19 needles / cm 2 or 20 needles / cm 2 wait.

[0044] Preferably, the needling density of the needling process is the same as the needling density of the first needle punched fabric layer or the needling density of the second needle punched fabric layer.

[0045] The present invention has no special restrictions on the specific materials of the 2.5D quartz fiber fabric, quartz fiber mesh and carbon fiber mesh cloth, and can be adjusted according to actual conditions.

[0046] In a second aspect, the present invention provides an application of the component-containing heat-insulating fabric according to the first aspect, wherein the component-containing heat-insulating fabric is used as a reinforcing matrix of a protective cover or a cabin heat-insulating jacket.

[0047] The component-containing heat-insulating fabric provided in the first aspect of the present invention has high strength and excellent heat-proof and heat-insulating properties, and can be preferably used as a reinforcing matrix for a protective cover or a cabin heat-proof jacket.

[0048] Compared with the prior art, the present invention has at least the following beneficial effects:

[0049] (1) The upper part of the inner insulation layer and the outer insulation layer of the component-containing heat-insulating fabric provided by the present invention are both made of fiber fabric layers, and the two are connected by quartz fiber weaving, so that the upper part does not need to be needled to effectively improve the overall strength of the upper end;

[0050] (2) The design of using a quartz fiber mesh as an insulation coating in the inner insulation layer of the component-containing heat-insulating fabric provided by the present invention effectively improves the interlayer connection strength of the high-thickness needle-punched fabric and the thermal insulation performance of the inner layer, while the design of the carbon fiber mesh cloth in the thickness direction further improves the overall uniformity and stability of the fabric;

[0051] (3) The preparation method of the component-containing heat-insulating fabric provided by the present invention is simple in process, can prepare an inner heat-insulating layer with excellent performance and high internal bonding strength, and can better achieve efficient connection between the quartz fiber fabric layer of the outer heat-proof layer and the inner heat-insulating layer, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a schematic diagram of the structure of the component-containing heat-insulating fabric provided in Example 1 of the present invention.

[0053] Figure 2 It is a schematic diagram of the structural unit layer of the first thorny fabric layer provided in Example 1 of the present invention.

[0054] In the figure: 1, outer heat protection layer; 2, inner heat insulation layer; 21, carbon fiber fabric layer; 22, first needle-punched fabric layer; 23, second needle-punched fabric layer; 221, carbon fiber mesh cloth; 222, quartz fiber mesh tire; 223, heat insulation coating. DETAILED DESCRIPTION

[0055] For the convenience of understanding the present invention, the present invention lists the following embodiments. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0056] It should be understood that, in the description of the present invention, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0057] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Example 1

[0059] This embodiment provides a component-containing heat-insulating fabric, see Figure 1 , the component-containing heat-insulating fabric comprises an outer heat-proof layer 1 and an inner heat-insulating layer 2;

[0060] The outer heat protection layer 1 is a quartz fiber fabric layer, the thickness of the outer heat protection layer 1 is 5 mm, and the density of the outer heat protection layer 1 is 1.0 g / cm 3 .

[0061] The inner heat insulation layer 2 is sequentially laminated to include a 2.5D carbon fiber fabric 21, a first needle-punched fabric layer 22, and a second needle-punched fabric layer 23; the first needle-punched fabric layer 22 and the second needle-punched fabric layer 23 contain a heat insulation coating 223; the heat insulation coating 223 contains a heat insulation component; see Figure 2 The structural unit layers of the first needle-punched fabric layer 22 and the second needle-punched fabric layer are independently composed of one layer of carbon fiber mesh cloth 221 and three layers of quartz fiber mesh 222. A heat-insulating coating 223 is arranged between each layer of the three layers of the quartz fiber mesh 222; the heat-insulating coating 223 accounts for 15% of the total weight of the inner heat-insulating layer 2. The heat-insulating coating 223 includes resin in addition to the heat-insulating component; the weight ratio of the heat-insulating component to the resin is 1.5:1; the heat-insulating component is nano-ceramic powder silicon oxide (particle size is 10 to 50 nm); the resin is phenolic resin (brand number is F-51A).

[0062] The thicknesses of the carbon fiber fabric layer 21, the first needle-punched fabric layer 22 and the second needle-punched fabric layer 23 are 25 mm, 30 mm and 28 mm respectively; the density of the carbon fiber fabric layer is 1.0 g / cm 3 The density of the first needle-punched fabric layer 22 is 0.4 g / cm 3 The density of the second needle-punched fabric layer 23 is 0.2 g / cm 3 .

[0063] The carbon fiber fabric layer 21 in the inner heat insulation layer 2 is connected to the outer heat protection layer 1 by quartz fiber weaving. The outer heat protection layer 1 is arranged on the side of the laminate, that is, the outer heat protection layer 1 is in contact with the 2.5D carbon fiber fabric layer 21, the first needle-punched fabric layer 22 and the second needle-punched fabric layer 23 at the same time. The first needle-punched fabric layer 22 and the second needle-punched fabric layer 23 in the inner heat insulation layer 2 are connected to the outer heat protection layer 1 by a needle-punching process.

[0064] In this embodiment, the material of the 2.5D quartz fiber fabric is 195B quartz fiber, the material of the quartz fiber web 222 is 85C quartz fiber, and the material of the carbon fiber mesh cloth 221 is T700-12K carbon fiber.

[0065] This embodiment also provides a method for preparing the above-mentioned component-containing heat-insulating fabric, and the preparation method comprises the following steps:

[0066] The heat insulation components and the resin are mixed in alcohol with a purity greater than 95% to obtain a heat insulation coating suspension.

[0067] After laying three layers of quartz fiber mesh according to the ratio of one layer of quartz fiber mesh to one layer of thermal insulation coating suspension, a layer of carbon fiber mesh cloth is laid to obtain a structural unit layer, and then the structural unit layer is stacked and laid and needle-punched layer by layer to form a second needle-punched fabric layer and a first needle-punched fabric layer; a carbon fiber fabric layer is woven on the upper part of the first needle-punched fabric layer to form an inner thermal insulation layer;

[0068] The quartz fiber fabric layer as the outer heat protection layer is connected with the inner heat insulation layer to obtain the component-containing heat insulation fabric; specifically, the quartz fiber fabric layer of the outer heat protection layer and the carbon fiber fabric layer of the inner heat insulation layer are woven and connected by quartz fiber; the first needle-punched fabric layer and the second needle-punched fabric layer are connected with the outer heat protection layer by a needle-punching process, wherein the needle-punching density of the first needle-punched fabric layer is 30 needles / cm 2 The second needle-punched fabric layer has a needle-punching density of 15 needles / cm 2 The needling density of the needling process is respectively the same as the needling density of the first needling fabric layer and the needling density of the second needling fabric layer.

[0069] Example 2

[0070] This embodiment provides a component-containing heat-insulating fabric, wherein the component-containing heat-insulating fabric comprises an outer heat-proof layer and an inner heat-insulating layer;

[0071] The outer heat protection layer is a quartz fiber fabric layer, the thickness of the outer heat protection layer is 10 mm, and the density of the outer heat protection layer is 1.5 g / cm 3 .

[0072] The inner heat-insulating layer is laminated in sequence and includes a carbon fiber fabric layer, a first needle-punched fabric layer, and a second needle-punched fabric layer; the first needle-punched fabric layer and the second needle-punched fabric layer contain a heat-insulating coating; the heat-insulating coating contains a heat-insulating component; the structural unit layers of the first needle-punched fabric layer and the second needle-punched fabric layer are each independently a layer of carbon fiber mesh cloth composited with three layers of quartz fiber mesh. A heat-insulating coating is arranged between each layer of the three layers of the quartz fiber mesh; the heat-insulating coating accounts for 10% of the total weight of the inner heat-insulating layer. In addition to the heat-insulating component, the heat-insulating coating also includes a resin; the weight ratio of the heat-insulating component to the resin is 1.2:1; the heat-insulating component is nano-ceramic powder silicon carbide (particle size is 60nm); the resin is a phenolic resin (brand number is F-51A).

[0073] The thicknesses of the carbon fiber fabric layer, the first needle-punched fabric layer, and the second needle-punched fabric layer are 22 mm, 20 mm, and 28 mm, respectively; the density of the carbon fiber fabric layer is 1.2 g / cm 3 The density of the first needle-punched fabric layer is 0.3 g / cm 3 The density of the second needle-punched fabric layer is 0.3g / cm 3 .

[0074] The outer heat protection layer is arranged at the side of the laminate, that is, the outer heat protection layer is in contact with the 2.5D carbon fiber fabric layer, the first needle-punched fabric layer and the second needle-punched fabric layer at the same time. The carbon fiber fabric layer in the inner heat insulation layer is connected to the outer heat protection layer by quartz fiber weaving. The first needle-punched fabric layer and the second needle-punched fabric layer in the inner heat insulation layer are connected to the outer heat protection layer by a needle punching process.

[0075] In this embodiment, the material of the 2.5D quartz fiber fabric is 195B quartz fiber, the material of the quartz fiber mesh is 85C quartz fiber, and the material of the carbon fiber mesh cloth is T700-12K carbon fiber.

[0076] This embodiment also provides a method for preparing the above-mentioned component-containing heat-insulating fabric, and the preparation method comprises the following steps:

[0077] The heat insulation components and the resin are mixed in alcohol with a purity greater than 95% to obtain a heat insulation coating suspension.

[0078] After laying three layers of quartz fiber mesh according to the ratio of one layer of quartz fiber mesh to one layer of thermal insulation coating suspension, a layer of carbon fiber mesh cloth is laid to obtain a structural unit layer, and then the structural unit layer is stacked and laid and needle-punched layer by layer to form a second needle-punched fabric layer and a first needle-punched fabric layer; a carbon fiber fabric layer is woven on the upper part of the first needle-punched fabric layer to form an inner thermal insulation layer;

[0079] The quartz fiber fabric layer as the outer heat protection layer is connected with the inner heat insulation layer to obtain the component-containing heat insulation fabric; specifically, the quartz fiber fabric layer of the outer heat protection layer and the carbon fiber fabric layer of the inner heat insulation layer are woven and connected by quartz fiber; the first needle-punched fabric layer and the second needle-punched fabric layer are connected with the outer heat protection layer by a needle-punching process, wherein the needle-punching density of the first needle-punched fabric layer is 40 needles / cm 2 The second needle-punched fabric layer has a needle-punching density of 20 needles / cm 2 The needling density of the needling process is respectively the same as the needling density of the first needling fabric layer and the needling density of the second needling fabric layer.

[0080] Example 3

[0081] This embodiment provides a component-containing heat-insulating fabric, wherein the component-containing heat-insulating fabric comprises an outer heat-proof layer and an inner heat-insulating layer;

[0082] The outer heat protection layer is a quartz fiber fabric layer, the thickness of the outer heat protection layer is 2 mm, and the density of the outer heat protection layer is 1.0 g / cm 3 .

[0083] The inner heat-insulating layer includes a carbon fiber fabric layer, a first needle-punched fabric layer and a second needle-punched fabric layer in sequence; the first needle-punched fabric layer and the second needle-punched fabric layer contain a heat-insulating coating; the heat-insulating coating contains a heat-insulating component; the structural unit layers of the first needle-punched fabric layer and the second needle-punched fabric layer are each independently a layer of carbon fiber mesh cloth composited with three layers of quartz fiber mesh. A heat-insulating coating is arranged between each layer of the three layers of quartz fiber mesh; the heat-insulating coating accounts for 20% of the total weight of the inner heat-insulating layer. In addition to the heat-insulating component, the heat-insulating coating also includes a resin; the weight ratio of the heat-insulating component to the resin is 2:1; the heat-insulating component is nano-ceramic powder silicon oxide (particle size is 60nm); the resin is a silicone resin.

[0084] The thicknesses of the carbon fiber fabric layer, the first needle-punched fabric layer, and the second needle-punched fabric layer are 28 mm, 30 mm, and 25 mm, respectively; the density of the carbon fiber fabric layer is 0.8 g / cm 3 The density of the first needle-punched fabric layer is 0.7 g / cm 3 The density of the second needle-punched fabric layer is 0.1g / cm 3 .

[0085] The outer heat protection layer is arranged at the side of the laminate, that is, the outer heat protection layer is in contact with the 2.5D carbon fiber fabric layer, the first needle-punched fabric layer and the second needle-punched fabric layer at the same time. The carbon fiber fabric layer in the inner heat insulation layer is connected to the outer heat protection layer by quartz fiber weaving. The first needle-punched fabric layer and the second needle-punched fabric layer in the inner heat insulation layer are connected to the outer heat protection layer by a needle punching process.

[0086] In this embodiment, the material of the 2.5D quartz fiber fabric is 195B quartz fiber, the material of the quartz fiber mesh is 85C quartz fiber, and the material of the carbon fiber mesh cloth is T700-12K carbon fiber.

[0087] This embodiment also provides a method for preparing the above-mentioned component-containing heat-insulating fabric, and the preparation method comprises the following steps:

[0088] The heat insulation components and the resin are mixed in alcohol with a purity greater than 95% to obtain a heat insulation coating suspension.

[0089] After laying three layers of quartz fiber mesh according to the ratio of one layer of quartz fiber mesh to one layer of thermal insulation coating suspension, a layer of carbon fiber mesh cloth is laid to obtain a structural unit layer, and then the structural unit layer is stacked and laid and needle-punched layer by layer to form a second needle-punched fabric layer and a first needle-punched fabric layer; a carbon fiber fabric layer is woven on the upper part of the first needle-punched fabric layer to form an inner thermal insulation layer;

[0090] The quartz fiber fabric layer as the outer heat protection layer is connected with the inner heat insulation layer to obtain the component-containing heat insulation fabric; specifically, the quartz fiber fabric layer of the outer heat protection layer and the carbon fiber fabric layer of the inner heat insulation layer are woven and connected by quartz fiber; the first needle-punched fabric layer and the second needle-punched fabric layer are connected with the outer heat protection layer by a needle-punching process, wherein the needle-punching density of the first needle-punched fabric layer is 25 needles / cm 2 The needle punching density of the second needle punched fabric layer is 10 needles / cm 2 The needling density of the needling process is respectively the same as the needling density of the first needling fabric layer and the needling density of the second needling fabric layer.

[0091] The component-containing thermal insulation fabrics provided in Examples 1 to 3 have the following advantages: first, the upper part of the inner thermal insulation layer and the outer thermal insulation layer of the component-containing thermal insulation fabric are both made of fiber fabric layers, and the two are connected by quartz fiber weaving, so that the upper part does not need to be needle-punched to effectively improve the overall strength of the upper end; secondly, the design of the thermal insulation coating separated by quartz fiber mesh in the inner thermal insulation layer of the component-containing thermal insulation fabric effectively improves the interlayer connection strength of the high-thickness needle-punched fabric and the thermal insulation performance of the inner layer, and the carbon fiber mesh cloth design in the thickness direction further improves the overall uniformity and stability of the fabric.

[0092] Example 4

[0093] This embodiment provides a component-containing heat-insulating fabric. Except that the heat-insulating coating accounts for 25% of the total weight of the inner heat-insulating layer, the rest of the component-containing heat-insulating fabric is the same as that of Embodiment 1, which will not be described again.

[0094] Example 5

[0095] This embodiment provides a component-containing heat-insulating fabric. The component-containing heat-insulating fabric is the same as that of Embodiment 1 except that the heat-insulating coating accounts for 5% of the total weight of the inner heat-insulating layer, and the rest is not described again.

[0096] Compared with Examples 4 to 5, in Example 1, the thermal insulation coating accounts for 15% of the total weight of the inner thermal insulation layer, which is 25% and 5% respectively in Examples 4 to 5. The overall flexibility of the fabric surface in Example 1 is higher than that in Example 4, and the weight is lighter, and it is more conducive to the subsequent preparation of composite materials, and the overall performance is better. On the one hand, the thermal insulation performance of Example 1 is better than that of Example 5, and on the other hand, the interlayer connection is stronger than that of Example 5, so that the stability of the overall structure of the fabric is higher than that of Example 5. This shows that the present invention preferably controls the proportion of the total weight of the thermal insulation coating and the inner thermal insulation layer within a specific range, further improves the thermal insulation effect, interlayer connection effect and flexibility, and has better comprehensive performance.

[0097] Example 6

[0098] This embodiment provides a component-containing heat-insulating fabric. The component-containing heat-insulating fabric has the same weight ratio of the heat-insulating component to the resin as that of Embodiment 1, and thus will not be described in detail.

[0099] Example 7

[0100] This embodiment provides a component-containing heat-insulating fabric. The component-containing heat-insulating fabric is the same as that of Embodiment 1 except that the weight ratio of the heat-insulating component to the resin is 1.0:1, and thus will not be described in detail.

[0101] The weight ratio of the thermal insulation component to the resin in Example 1 is 1.5:1, compared with 2.2:1 and 1.0:1 in Examples 6 to 7 respectively. The thermal insulation performance of Example 1 is better than that of Examples 6 and 7, and the interlayer connection effect of the fabric in Example 1 is better, and the overall structural strength is better than that of Example 6. This shows that the present invention preferably controls the weight ratio of the thermal insulation component to the resin within a specific range, further improves the thermal insulation effect and the interlayer connection effect, and has broad application prospects.

[0102] Example 8

[0103] This embodiment provides a component-containing heat-insulating fabric. The component-containing heat-insulating fabric is the same as that of Embodiment 1 except that the inner heat-insulating layer does not contain the carbon fiber mesh cloth, and the details are not described again.

[0104] Compared with Example 8, Example 1 contains carbon fiber mesh cloth in the inner insulation layer, and the overall uniformity and stability of the fabric are higher.

[0105] Comparative Example 1

[0106] This comparative example provides a component-containing heat-insulating fabric, which is the same as Example 1 except that no heat-insulating coating is provided between the layers of the quartz fiber web, and is not described in detail here.

[0107] This comparative example does not provide a thermal insulation coating. On the one hand, the thermal insulation performance of the inner thermal insulation layer is lower than that of Example 1. On the other hand, there is a lack of resin bonding effect between the fiber mesh layers, resulting in a decrease in the interlayer bonding strength within the inner thermal insulation layer.

[0108] The present invention illustrates the detailed features of the present invention through the above embodiments, but the present invention is not limited to the above detailed features, that is, it does not mean that the present invention must rely on the above detailed features to be implemented. Those skilled in the art should understand that any improvement to the present invention, equivalent replacement of the technical features selected by the present invention, addition of auxiliary technical features, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for preparing a component-containing heat-insulating fabric, characterized in that: The preparation method comprises: The heat insulation component and the resin are mixed in an organic solvent to obtain a heat insulation coating suspension; After laying three layers of quartz fiber mesh according to the ratio of one layer of quartz fiber mesh to one layer of thermal insulation coating suspension, a layer of carbon fiber mesh cloth is laid to obtain a structural unit layer, and then the structural unit layer is stacked and laid and needle-punched layer by layer to form a second needle-punched fabric layer and a first needle-punched fabric layer; a carbon fiber fabric layer is woven on the upper part of the first needle-punched fabric layer to form an inner thermal insulation layer; A quartz fiber fabric layer as an outer heat-proof layer is connected to an inner heat-insulating layer to obtain a component-containing heat-insulating fabric; the outer heat-proof layer is arranged on the side of the inner heat-insulating layer, and the outer heat-proof layer is in contact with the carbon fiber fabric layer, the first needle-punched fabric layer and the second needle-punched fabric layer at the same time; The quartz fiber fabric layer of the outer heat protection layer and the carbon fiber fabric layer of the inner heat insulation layer are woven and connected by quartz fiber; The first needle-punched fabric layer and the second needle-punched fabric layer are connected to the outer heat protection layer by a needle-punching process; The thermal insulation coating accounts for 10-20% of the total weight of the inner thermal insulation layer; The weight ratio of the thermal insulation component to the resin is (1.2-2):1; The density of the outer heat protection layer is 1-1.5 g / cm 3 ; The density of the carbon fiber fabric layer is 0.8-1.2 g / cm 3 ; The density of the first needle-punched fabric layer is 0.3-0.7 g / cm 3 ; The density of the second needle-punched fabric layer is 0.1-0.3 g / cm 3 .

2. The preparation method according to claim 1, characterized in that: The thickness of the outer heat protection layer is 2-10 mm; The quartz fiber fabric layer is a 2.5D quartz fiber fabric layer.

3. The preparation method according to claim 1, characterized in that: The thickness of the carbon fiber fabric layer, the first needle-punched fabric layer, and the second needle-punched fabric layer are each independently 20 to 30 mm; The carbon fiber fabric layer is a 2.5D carbon fiber fabric layer.

4. The preparation method according to claim 1, characterized in that: The thermal insulation component includes nano-scale ceramic powder; The nano-scale ceramic powder includes any one of hafnium, zirconium, molybdenum, titanium, tantalum silicide, boride, carbide, silicon oxide, hydrous magnesium silicate, boric acid or boric acid ester, or a combination of at least two thereof.

5. The preparation method according to claim 1, characterized in that: The needle punching density of the first needle punched fabric layer is 25 to 40 needles / cm 2 , The needle punching density of the second needle punched fabric layer is 10 to 20 needles / cm 2 .

6. The preparation method according to claim 5, characterized in that: The needling density of the needling process is the same as the needling density of the first needle-punched fabric layer or the needling density of the second needle-punched fabric layer.

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