Aluminum-plated fire-fighting fabric and preparation method thereof

Abstract

The invention relates to the technical field of fire-fighting protective clothing, in particular to an aluminized fire-fighting fabric and a preparation method thereof. The aluminized fire-fighting fabric comprises a substrate layer, a first reflecting layer, a resin layer, a transition layer and a second reflecting layer which are sequentially arranged from bottom to top, the base layer is made of aramid blend fibers; the aramid fiber blend fiber comprises 15 to 40 weight percent of meta-position aramid fiber, 2 to 10 weight percent of copolymerized aramid fiber and 40 to 75 weight percent of modacrylic fiber with modacrylic fiber with modacrylic fiber with modacrylic fiber with modacrylic fiber with modacrylic fiber with modacrylic fiber with modacrylic fiber; the first reflecting layer and the second reflecting layer are simple substance metal layers; the transition layer is a metal elementary substance layer, an alloy layer or a metal compound layer. The preparation method comprises the following steps: mixing and spinning the polyvinyl chloride fiber, the acrylonitrile fiber, the meta-position aramid fiber and the copolymerized aramid fiber, and weaving into the substrate layer; depositing a first reflective layer on the substrate layer; coating and curing the first reflecting layer to form a resin layer; depositing a transition layer on the resin layer; and depositing a second reflecting layer on the transition layer. The fabric disclosed by the invention is simple in structure and has good thermal protection performance and film interlayer binding force.

Description

Technical Field

[0001] The present application relates to the technical field of fire protection clothing, and in particular to an aluminum-plated fire-fighting fabric and a preparation method thereof. Background Art

[0002] Fire has been a major disaster that seriously threatens human life and property safety since ancient times. With the development of science and technology, the causes and types of fires have become more and more complex, and the severity varies. Fire suits can protect firefighters at the fire scene from the harm of toxic and harmful substances in the fire, so it is particularly important to strengthen the protective performance of fire suits.

[0003] The prior art discloses a multi-layer composite fabric for fire-fighting clothing with fireproof and heat insulation and a preparation method thereof (Announcement No.: CN115157803B), wherein the fabric is made by sewing a fireproof layer, a waterproof and breathable layer, a heat-insulating layer, and a comfort layer. The fireproof layer is an aramid fiber woven fabric; the waterproof and breathable layer includes an aramid nonwoven fabric and a PTFE film; the heat-insulating layer is an aramid fiber nonwoven fabric and a coating, and the coating contains a heat-insulating aerogel and a polyurethane emulsion; and the comfort layer includes an aramid nonwoven fabric and an aramid blended base fabric.

[0004] The prior art also discloses a metal reflective fabric (publication number: GB924636A), in which an adhesive layer, an inner metal layer, a resin layer, and an outer metal layer are sequentially arranged on a fabric base; the two metal layers are vacuum-deposited aluminum layers or silver layers, and the thickness of the outer metal layer is preferably 5-10 times the thickness of the inner metal layer.

[0005] However, the prior art (CN115157803B) uses fireproof aerogel to achieve fireproof and heat insulation, but only has heat insulation effect and cannot achieve heat reflection, and the fire protection effect is poor; on the other hand, its substrate is a single aramid fiber woven fabric, and the protection performance and flame retardant performance have a large room for improvement. The prior art (GB924636A) achieves the functions of heat reflection and fire protection by setting two layers of metal Al layers. The prior art has the following problems: (1) The structure is complex, and a separate adhesive layer is required to combine the fabric substrate and the inner metal layer; (2) The substrate is an ordinary fabric, and the flame retardant and heat insulation effect is poor; (3) The bonding force between the interfaces is weak, resulting in fractures and dislocations between the resin layer and the metal layer, poor mechanical properties, and a shortened service life. Summary of the invention

[0006] In order to solve the problems existing in the above-mentioned prior art, the present application provides an aluminum-plated fire-fighting fabric and a preparation method thereof. On the one hand, the thermal protection capability and wearing comfort are improved by blending an aramid fiber base, and on the other hand, the mechanical properties of the fabric are improved by setting a transition layer.

[0007] The invention provides an aluminum-plated fire-fighting fabric, comprising a base layer, a first reflective layer, a resin layer, a transition layer, and a second reflective layer which are arranged in sequence from bottom to top; the material of the base layer is selected from aramid blended fibers; the aramid blended fibers include 15-40wt% of meta-aramid fibers, 2-10wt% of copolymerized aramid fibers, and 40-75wt% of chloronitrile fibers; the first reflective layer and the second reflective layer are both single-substance metal layers; the transition layer is a single-substance metal layer, an alloy layer, or a metal compound layer.

[0008] Introducing a transition layer between the second reflective layer and the resin layer can release and reduce the residual stress generated on the interface between the second reflective layer and the resin layer due to different thermal expansion coefficients, thereby improving the film-base bonding strength between the second reflective layer and the resin layer and enhancing the mechanical properties of the overall fabric.

[0009] According to an embodiment of the present invention, the thickness of the base layer is 5-500 μm; the nylon fiber includes polyvinyl chloride fiber and polyacrylonitrile fiber; and the mass ratio of the polyvinyl chloride fiber to the polyacrylonitrile fiber is 0.5-1.75.

[0010] By adjusting the proportion of each component of the aramid blended fiber in the base layer, the strength and elongation of the fabric and the wearing comfort can be improved, while the fabric can also have higher thermal protection performance.

[0011] Preferably, the thickness of the base layer is further set to 50-200 μm, so as to further reduce the weight and improve the air permeability and moisture permeability.

[0012] According to an embodiment of the present invention, the mass ratio of the copolymerized aramid fiber to the meta-aramid fiber is 0.1-0.2.

[0013] Specifically, the copolymerized aramid fiber is made by spinning copolymerized aramid, and the copolymerized aramid is made by introducing p-phenylenebenzimidazole heterocyclic diamine into para-aramid and performing low-temperature polycondensation.

[0014] Preferably, the mass ratio of the copolymerized aramid fiber to the meta-aramid fiber is 0.1-0.13, which is used to further improve the strength and elongation properties and thermal protection properties of the base layer.

[0015] According to an embodiment of the present invention, the thickness of the first reflective layer and the second reflective layer are both 5-500nm, and the thickness of at least one of the first reflective layer and the second reflective layer is 200-500nm; the material of the first reflective layer and the second reflective layer is selected from at least one of Au, Ag, Cu, Al, Ti, and Ni.

[0016] The first reflective layer and the second reflective layer are used to reflect infrared light, thereby improving the heat reflection performance and heat protection performance of the fabric. At the same time, setting the thickness of at least one reflective layer to 200-500nm can improve the wear resistance of the reflective layer and extend the service life of the fabric while ensuring the heat reflection performance.

[0017] Preferably, the first reflective layer and the second reflective layer are both single-element Al layers.

[0018] According to an embodiment of the present invention, the thickness of the resin layer is 1-100 μm; the material of the resin layer is selected from at least one of PI and PTFE.

[0019] Preferably, the resin layer has a thickness of 40-70 μm, and has irregularly distributed porous structures with a pore size of 0.01-2 μm and a porosity of 40-70%. The porous structures can improve the moisture absorption, perspiration and air permeability of the resin layer, and further improve the wearing comfort of the fabric.

[0020] According to an embodiment of the present invention, the thickness of the transition layer is 5-25 nm; the material of the transition layer is selected from Ni, Cr, NiCr alloy, TiN, TiO, TiO 2 At least one of .

[0021] According to an embodiment of the present invention, the transition layer is doped with a doping metal, and the doping metal is selected from at least one of Ti, Fe, stainless steel, and Cu; the doping amount of the doping metal is 0.5-3wt%.

[0022] Doped metal is added to the transition layer to further match the difference in thermal expansion coefficients between the resin layer and the second reflective layer, thereby improving the bonding strength between the film layers.

[0023] The present invention also provides a method for preparing an aluminized fire-fighting fabric, which is used to prepare the aluminized fire-fighting fabric as described in any one of the embodiments, comprising the following steps:

[0024] S1: spinning and weaving a blend of polyvinyl chloride fiber, acrylonitrile fiber, meta-aramid fiber and co-aramid fiber into a flexible base layer;

[0025] S2: depositing a first reflective layer on the substrate layer;

[0026] S3: coating and curing on the first reflective layer to form a resin layer;

[0027] S4: depositing a transition layer on the resin layer;

[0028] S5: depositing a second reflective layer on the transition layer.

[0029] According to an embodiment of the present invention, in step S1, the meta-aramid fiber and the copolymerized aramid fiber are subjected to surface etching treatment before mixed yarn spinning, and the step of the surface etching treatment is: taking the meta-aramid fiber and the copolymerized aramid fiber and immersing them in an etching solution for 30-60 minutes at 60-80°C; the etching solution is selected from any one of methacryloyl chloride, acetic anhydride or phosphoric acid.

[0030] The surface etching treatment can improve the surface roughness of the aramid fiber, increase the contact area between the base layer and the first reflective layer when sputtering the first reflective layer, thereby improving the bonding force between the film layers, and improving the wear resistance and service life of the fabric. After etching the surface of the aramid fiber, the necessity of setting an additional connecting adhesive layer between the base layer and the first reflective layer is eliminated, thereby simplifying the structure of the aluminum-plated fire-fighting fabric, reducing weight and improving wearing comfort.

[0031] Furthermore, the steps of blended yarn spinning include blending cotton, opening, mixing wool, carding cotton, drawing, roving, spun yarn, steaming yarn, and winding. The steps of weaving can be arbitrarily selected by those skilled in the art according to the prior art.

[0032] In step S2, the first reflective layer is deposited by magnetron sputtering: a metal target is selected as the first target material, a DC power supply is connected, and the sputtering power is 50-200W; the gas pressure in the sputtering chamber is 0.1-3.0Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15-80sccm.

[0033] Preferably, the first reflective layer is a single-element Al layer, and the first target material is also a single-element Al target.

[0034] Preferably, before depositing the first reflective layer in step S2, a pre-sputtering step is further included, wherein the vacuum degree of the pre-sputtering is 2×10 -1 Pa, the pre-sputtering time is 1 min; the pre-sputtering is used to remove oxide impurities on the first target material.

[0035] Specifically, in step S3, a resin slurry is taken and coated on the first emission layer to form a coating film, and the coating film is cured to form a resin layer. The resin slurry is PI slurry or PTFE slurry. The coating and curing are both publicly known technologies, and those skilled in the art can prepare resin layers of different thicknesses according to the prior art, so they will not be described in detail here.

[0036] Preferably, when the porous structure is irregularly distributed on the resin layer, in step S3, after coating the first emissive layer to form a coating film, a step of foaming in the coating film to form a porous coating film is also included, and the porous coating film is solidified to form a porous resin layer. The foaming is also a publicly known technology, and those skilled in the art can foam to form porous structures with different pore sizes and porosities according to the prior art, so it will not be repeated here.

[0037] In step S4, the transition layer is deposited by magnetron sputtering: a metal single substance target, an alloy target or a metal compound ceramic target is selected as the second target material, connected to a DC power supply, and the sputtering power is 30 to 100 W; the gas pressure in the sputtering chamber is 0.1 to 3.0 Pa, and the deposition atmosphere is argon, or a mixture of argon and oxygen, or a mixture of argon and nitrogen, and the gas flow rate is 15 to 40 sccm.

[0038] Specifically, the material of the transition layer is selected from Ni, Cr, NiCr alloy, TiN, TiO, TiO 2 When the transition layer is a Ni layer, a Cr layer or a NiCr alloy layer, the second target material is a Ni metal single target, a Cr metal single target or a NiCr alloy target, and the deposition atmosphere is argon. When the transition layer is a TiO layer or a TiO 2 When the transition layer is a TiN layer, the second target material is a TiN ceramic target, and the deposition atmosphere is argon; or the second target material is a Ti metal target, and the deposition atmosphere is a mixed gas of argon and oxygen. When the transition layer is a TiN layer, the second target material is a TiN ceramic target, and the deposition atmosphere is argon; or the second target material is a Ti metal target, and the deposition atmosphere is a mixed gas of argon and nitrogen.

[0039] Preferably, before depositing the transition layer in step S4, a pre-sputtering step is further included, wherein the vacuum degree of the pre-sputtering step is 2×10 -1 Pa, the pre-sputtering time is 1 min; the pre-sputtering is used to remove oxide impurities on the second target material.

[0040] In step S5, the second reflective layer is deposited by magnetron sputtering: a metal target is selected as the third target material, a DC power supply is connected, and the sputtering power is 50-200 W; the gas pressure in the sputtering chamber is 0.1-3.0 Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15-80 sccm.

[0041] Preferably, the second reflective layer is a single Al layer, and the third target material is also a single Al target.

[0042] As a further preference, when the first target material and the third target material are both single-element Al targets, the first target material can also be used to deposit the second reflective layer, thereby saving the third target material and reducing production costs.

[0043] According to an embodiment of the present invention, step S4 further includes a fourth target material; the fourth target material is a metal single target or an alloy target, connected to a radio frequency power supply, and the sputtering power is 5-10W.

[0044] The fourth target material is used to add doped metal to the transition layer. At the same time, the fourth target material is connected to a radio frequency power supply. Compared with DC sputtering, radio frequency sputtering has a higher sputtering frequency, more stable plasma and equal high ion bombardment energy, which can improve the density and uniformity of doped metal doping in the transition layer, improve the doping quality, and thus further improve the bonding strength between film layers.

[0045] According to the embodiments of the present invention, there are at least the following beneficial effects:

[0046] The aluminum-plated fire-fighting fabric of the present invention improves the film bonding strength between the resin layer and the second reflective layer by introducing a transition layer, so that the fabric has better wear resistance and stability; by changing the blending composition and proportion of the base layer, the strength and elongation of the fabric and the wearing comfort can be improved without affecting the thermal protection performance; the structure is simpler, and the bonding strength between the base layer and the first reflective layer is improved by etching the surface of the aramid fiber, so there is no need to set up additional structures such as connecting adhesive layers, making the fabric lighter, improving the wearing comfort, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0048] Figure 1 It is a schematic diagram of the membrane layer structure of the aluminum-plated fire-fighting fabric in the specific embodiment disclosed in this application.

[0049] In the figure: 1, base layer; 2, first reflective layer; 3, resin layer; 4, transition layer; 5, second reflective layer. DETAILED DESCRIPTION

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "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, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0052] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0053] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0054] like Figure 1 As shown, the present invention discloses an aluminum-plated fire-fighting fabric, which includes a base layer 1, a first reflective layer 2, a resin layer 3, a transition layer 4, and a second reflective layer 5 which are arranged in sequence.

[0055] The thickness of the base layer 1 is 5-500 μm, preferably 50-200 μm. A too thick base layer 1 will increase the weight of the fabric, reduce the portability and wearing comfort, and a too thin base layer 1 will also affect the thermal protection performance of the fabric, while reducing the wear resistance and service life of the fabric. The base layer 1 is made of heat-resistant flexible fiber material, preferably aramid blended fiber, the aramid blended fiber includes 15-40wt% meta-aramid fiber, 2-10wt% copolymerized aramid fiber, 40-75wt% nitrile fiber, the nitrile fiber includes polyvinyl chloride fiber and polyacrylonitrile fiber, and the mass ratio of the polyvinyl chloride fiber to the polyacrylonitrile fiber is 0.5-1.75. Specifically, in an embodiment of the present application, the aramid blended fiber contains 20-35wt% polyvinyl chloride fiber, 20-40wt% acrylonitrile fiber, 15-40wt% meta-aramid fiber and 2-10wt% copolymerized aramid fiber. Preferably, the mass ratio of the copolymerized aramid fiber to the meta-aramid fiber is 0.1-0.2, more preferably 0.1-0.13. The copolymerized aramid fiber is spun from the copolymerized aramid fiber, which is formed by introducing para-aramid into the para-aramid heterocyclic diamine and polycondensing at low temperature. As a further preference, the meta-aramid fiber and the copolymerized aramid fiber are subjected to surface etching modification before mixed yarn spinning, and the meta-aramid fiber and the copolymerized aramid fiber subjected to etching modification have higher surface roughness, so that the contact area between the base layer 1 and the first reflective layer 2 can be increased when the first reflective layer 2 is deposited, thereby improving the bonding force between the membrane layers. By regulating the components and proportions of the blended aramid fiber, the strength and elongation properties of the base layer 1 can be improved without affecting the thermal protection performance, so that the fabric has good elasticity, fracture resistance, wearing comfort, and excellent thermal protection performance.

[0056] The thickness of the resin layer 3 is 1-100 μm, more preferably 40-70 μm. The material of the resin layer 3 is selected from heat-resistant polymer resins, such as polyimide PI or polytetrafluoroethylene PTFE. On the one hand, the resin layer 3 serves as a carrier for the second reflective layer 5 or the transition layer 4, connecting the second reflective layer 5 or the transition layer 4 to the first reflective layer 2; on the other hand, the resin layer 3 is made of a heat-resistant resin material, which can take into account the functions of heat insulation and moisture absorption and breathability. Preferably, a porous structure is irregularly arranged on the resin layer 3, and the pore size of each hole in the porous structure is 10nm-2μm, and the overall porous structure accounts for 40-70% of the volume of the resin layer 3, that is, the porosity of the porous structure is 40-70%. The porous structure can further improve the moisture absorption, moisture permeability and breathability of the resin layer 3, thereby further improving the wearing comfort of the aluminum-plated fire-fighting fabric of the present application.

[0057] The first reflective layer 2 and the second reflective layer 5 are both metal single-substance layers, and their materials can be selected from any one of Au, Ag, Cu, Al, Ti, and Ni; at the same time, the thickness of the two reflective layers is 5-500nm. Preferably, the material of the two reflective layers is Al, and the thickness of at least one of the two reflective layers is 200-500nm. The two reflective layers are used to reflect infrared light, thereby improving the thermal reflective performance of the fabric. The material is preferably Al because Al has a high mid-infrared reflectivity, a low density and a low cost, and is currently the most suitable coating material for commercial thermal reflective fabrics. When the thickness of the thermal reflective layer is too large, the overall weight of the fabric will increase, which will increase the production cost on the one hand, and reduce the comfort and convenience of wearing on the other hand; when the thickness is too small, its thermal reflective effect will be reduced, and its mechanical properties such as wear resistance will be significantly reduced, affecting the use effect and service life.

[0058] The thickness of the transition layer 4 is 5-25 nm, and the material of the transition layer 4 is selected from a metal element, an alloy or a metal compound. Specifically, the metal element is selected from Ni or Cr; the alloy is NiCr alloy; the metal compound is selected from TiN, TiO or TiO 2 . Preferably, the transition layer 4 is also doped with a doped metal, and the doped metal is selected from at least one of Ti, Fe, stainless steel, and Cu; the doping amount of the doped metal is 0.5-3wt%. The transition layer 4 is used to transition the large difference in thermal expansion coefficient between the resin layer 3 and the second reflective layer 5, thereby releasing and reducing the residual stress between the film layer interfaces and improving the bonding strength between the film layer interfaces. Adding doped metal material to the transition layer 4 can further match the thermal expansion coefficient and Young's modulus between the resin layer 3, the transition layer 4 and the second reflective layer 5, thereby further reducing the residual stress between the film layers and improving the bonding strength between the film layers.

[0059] The present application also discloses a method for preparing the aluminized fire-fighting fabric:

[0060] S1: Take meta-aramid fiber and co-aramid fiber and place them in an etching solution at 60-80°C for 30-60 minutes; take the etched meta-aramid fiber and co-aramid fiber, mix them with polyvinyl chloride fiber and acrylonitrile fiber for spinning and weaving into a flexible base layer 1; wherein the mass percentage of each part in the base layer 1 is: polyvinyl chloride fiber 20-35wt%, acrylonitrile fiber 20-40wt%, meta-aramid fiber 15-40wt%, co-aramid fiber 2-10wt%. The steps of mixed spinning and weaving can be freely selected according to the existing technology, for example, the mixed spinning includes mixing cotton, opening, mixing wool, combing cotton, drawing, roving, spun yarn, steaming yarn, and winding in sequence.

[0061] Specifically, the etching solution is selected from any one of methacryloyl chloride, acetic anhydride or phosphoric acid.

[0062] S2: magnetron sputtering deposition of the first reflective layer 2 on the substrate layer 1: pre-sputtering to remove impurities on the surface of the target material, the vacuum degree is 2×10 -1 Pa; the fabric substrate is placed in a sputtering chamber for sputtering, a pure metal target is selected as the first target material, a DC power supply is connected, and the sputtering power is 50-200W; the gas pressure in the sputtering chamber is 0.1-3.0Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15-80sccm.

[0063] S3: coating and curing on the first reflective layer 2 to form a resin layer 3: taking the coating resin slurry, coating on the first emission layer to form a coating film, and curing the coating film to form a porous resin layer 3.

[0064] Preferably, when an irregular porous structure is provided on the resin layer 3, the preparation process of the resin layer 3 also includes a foaming step. In this case, step S3 is: taking the coating resin slurry, coating it on the first emission layer to form a coating film, foaming the coating film to form a porous coating film, and curing the porous coating film to form a porous resin layer 3.

[0065] It should be noted that the coating, foaming and curing processes mentioned in step S3 are all existing technologies, and those skilled in the art can carry out production based on the disclosed content, so this application will not repeat them.

[0066] S4: magnetron sputtering deposition of transition layer 4 on resin layer 3: pre-sputtering to remove impurities on the target surface, the vacuum degree is 2×10 -1 Pa, place the fabric substrate in the sputtering chamber for sputtering, select a metal single target, an alloy target or a metal compound ceramic target as the second target material, connect it to a DC power supply, and the sputtering power is 30-100W; the gas pressure in the sputtering chamber is 0.1-3.0Pa, the deposition atmosphere is argon, or a mixture of argon and oxygen, or a mixture of argon and nitrogen, and the gas flow rate is 15-40sccm.

[0067] Specifically, the material of the transition layer 4 is selected from Ni, Cr, NiCr alloy, TiN, TiO, TiO 2 When the transition layer 4 is a Ni layer, a Cr layer or a NiCr alloy layer, the second target material is a Ni metal single substance target, a Cr metal single substance target or a NiCr alloy target, and the deposition atmosphere is argon. When the transition layer 4 is a TiO layer or a TiO 2 When the transition layer 4 is a TiN layer, the second target material is a TiN ceramic target, and the deposition atmosphere is argon; or the second target material is a Ti metal single target, and the deposition atmosphere is a mixed gas of argon and oxygen. When the transition layer 4 is a TiN layer, the second target material is a TiN ceramic target, and the deposition atmosphere is argon; or the second target material is a Ti metal single target, and the deposition atmosphere is a mixed gas of argon and nitrogen.

[0068] Preferably, when the transition layer 4 is doped with a doped metal, while sputtering the second target material, a fourth target material is also sputtered synchronously to add the doped metal into the transition layer 4: the fourth target material is a metal element target or an alloy target, connected to a radio frequency power supply, and the sputtering power is 5 to 10 W; because the fourth target material and the second target material are sputtered synchronously in the same sputtering chamber, parameters such as gas pressure, deposition atmosphere, gas flow rate, etc. are the same as the conditions disclosed for the second target material.

[0069] S5: Deposit the second reflective layer 5 on the transition layer 4 by magnetron sputtering: Continue sputtering on the transition layer 4, select a third target material pure metal target, connect a DC power supply, and the sputtering power is 50-200W; the gas pressure in the sputtering chamber is 0.1-3.0Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15-80sccm.

[0070] Preferably, when the first reflective layer 2 and the second reflective layer 5 are made of the same material, the sputtering of the second reflective layer 5 can also be performed by using the first target material, in which case one target material position can be saved, thereby reducing production costs.

[0071] After the preparation is completed, the aluminized fire-fighting fabric disclosed in the present application is obtained, and the performance of the aluminized fire-fighting fabric obtained is tested. The test standards used in the present application are:

[0072] Abrasion test: Based on the national standard GB / T 21196-2007 and the Martindale method, the Martindale abrasion tester was used to perform parallel friction on the fabric surface and observe the changes in its appearance.

[0073] Tensile test: Based on the national standard GB / T 2916-1997, the breaking strength and breaking elongation of the fabric are tested under the conditions of 500mm clamping distance, 500mm / min tensile speed, and (0.5±0.1)cN / tex pre-tension.

[0074] Air permeability test: Based on the national standard GB / T 5453-1997, a digital air permeability meter is used to test the air permeability of the fabric.

[0075] Moisture permeability test: Based on the national standard GB / T 12704.1-2009, the moisture absorption method is used to test the moisture permeability of the fabric.

[0076] Thermal protection performance test: Based on the national standard GB / T 38302-2019, the thermal protection performance TPP value and thermal radiation protection performance RPP value of the fabric are tested.

[0077] Flame retardant performance test: Based on the national standard GB / T 5455-2014, the flame retardant performance of the fabric is tested using the vertical method.

[0078] The present invention is further described in detail below in conjunction with specific embodiments.

[0079] Embodiment 1

[0080] The meta-aramid fiber and the copolymerized aramid fiber were placed in a methacrylic chloride solution and etched for 60 minutes at 60°C.

[0081] Take 18 parts of the etched meta-aramid fiber and 2 parts of the copolymerized aramid fiber, add 15 parts of vinyl chloride fiber and 15 parts of acrylonitrile fiber, blend and spin, and weave into a flexible fabric base layer 1.

[0082] Select Al target as the first target material, and sputter the first reflective layer 2 on the base layer 1. -1 Pre-sputtering under a vacuum degree of 1.6 Pa; the fabric is placed in the sputtering chamber, the first target is connected to a DC power supply, the sputtering power is 180 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 73 sccm.

[0083] Take PI resin slurry, apply a coating film on the first reflective layer 2, and then form a porous PI resin layer 3 through foaming and curing.

[0084] Ti target was selected as the second target material, and the transition layer 4 was sputtered on the resin layer 3. -1 Pre-sputtering under a vacuum degree of 600 Pa; the fabric is placed in the sputtering chamber, the second target is connected to a DC power supply, the sputtering power is 80 W, the gas pressure is 2.6 Pa, the deposition atmosphere is a mixed atmosphere of nitrogen and argon, and the gas flow rate is 30 sccm.

[0085] An Al target is selected as the third target material, and the second reflective layer 5 is sputtered on the transition layer 4. The third target material is connected to a DC power supply, the sputtering power is 100 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 50 sccm.

[0086] The fire-fighting fabric prepared in this embodiment has a 100μm base layer 1 (30wt% vinyl chloride fiber, 30wt% acrylonitrile fiber, 36wt% meta-aramid fiber, 4wt% copolymerized aramid fiber), a 460nm first reflective layer 2 (Al layer), a 70μm resin layer 3 (PI), a 22nm transition layer 4 (TiN layer), and an 80nm second reflective layer 5 (Al layer).

[0087] The fire-fighting fabric prepared in this embodiment was tested for performance:

[0088] The coating on the fabric surface did not fall off within less than 1000 frictions. The breaking strength is 23.1cN / dtex, the breaking elongation is 10.39%, and the thermal shrinkage is 2.7%. The air permeability is 577L / m2·d, and the moisture permeability is 5935g / m2·d. The thermal protection performance TPP is 39cal / cm2, and the thermal radiation protection performance RPP is 31cal / cm2. The flame retardant performance is 0s in the warp direction, 0s in the weft direction, 19mm in the warp direction, and 17mm in the weft direction.

[0089] Embodiment 2

[0090] The meta-aramid fiber and the copolymerized aramid fiber were placed in a methacrylic chloride solution at 60° C. and etched for 60 minutes.

[0091] Take 18 parts of the etched meta-aramid fiber and 2 parts of the copolymerized aramid fiber, add 15 parts of vinyl chloride fiber and 15 parts of acrylonitrile fiber, blend and spin, and weave into a flexible fabric base layer 1.

[0092] Select Al target as the first target material, and sputter the first reflective layer 2 on the base layer 1. -1 Pre-sputtering under a vacuum degree of 1.6 Pa; the fabric is placed in the sputtering chamber, the first target is connected to a DC power supply, the sputtering power is 180 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 73 sccm.

[0093] Take PTFE resin slurry, apply a coating film on the first reflective layer 2, and then form a porous PTFE resin layer 3 through foaming and curing.

[0094] At the same time, the second target material and the fourth target material are selected, wherein the second target material is a NiCr alloy target and the fourth target material is a Ti target, and the transition layer 4 is sputtered on the resin layer 3. -1 Pre-sputtering under a vacuum degree of 0.2 Pa; placing fabric in the sputtering chamber, connecting the second target to a DC power supply with a sputtering power of 80 W, and connecting the fourth target to an RF power supply with a sputtering power of 8 W; the gas pressure in the chamber is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 30 sccm; performing dual-target sputtering simultaneously.

[0095] Al target is selected as the third target material, and the second reflective layer 5 is sputtered on the transition layer 4. The third target material is connected to a DC power supply, the sputtering power is 100W, the gas pressure is 2.6Pa, the deposition atmosphere is pure argon, and the gas flow rate is 50sccm.

[0096] The fire-fighting fabric prepared in this embodiment has a 100μm base layer 1 (30wt% vinyl chloride fiber, 30wt% acrylonitrile fiber, 36wt% meta-aramid fiber, 4wt% copolymerized aramid fiber), a 460nm first reflective layer 2 (Al layer), a 70μm resin layer 3 (PTFE), a 23nm transition layer 4 (2.7wt% Ti-doped NiCr alloy layer), and an 80nm second reflective layer 5 (Al layer).

[0097] The fire-fighting fabric prepared in this embodiment was tested for performance:

[0098] The coating on the fabric surface did not fall off within less than 1500 frictions. The breaking strength is 24.0cN / dtex, the breaking elongation is 10.72%, and the thermal shrinkage is 2.7%. The air permeability is 545L / m2·d, and the moisture permeability is 5912g / m2·d. The thermal protection performance TPP is 40cal / cm2, and the thermal radiation protection performance RPP is 33cal / cm2. The flame retardant performance is 0s in the warp direction, 0s in the weft direction, 20mm in the warp direction, and 16mm in the weft direction.

[0099] Embodiment 3

[0100] The meta-aramid fiber and the copolymerized aramid fiber were placed in a methacrylic chloride solution at 80°C and etched for 30 minutes.

[0101] Take 20 parts of the etched meta-aramid fiber and 4 parts of the copolymerized aramid fiber, add 11 parts of vinyl chloride fiber and 15 parts of acrylonitrile fiber, blend and spin, and weave into a flexible fabric base layer 1.

[0102] Select Al target as the first target material, and sputter the first reflective layer 2 on the base layer 1. -1 Pre-sputtering under a vacuum degree of 1.6 Pa; the fabric is placed in the sputtering chamber, the first target is connected to a DC power supply, the sputtering power is 120 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 50 sccm.

[0103] Take PTFE resin slurry, apply a coating film on the first reflective layer 2, and then form a porous PTFE resin layer 3 through foaming and curing.

[0104] At the same time, the second target material and the fourth target material are selected, wherein the second target material is a Ni target and the fourth target material is a Fe target, and the transition layer 4 is sputtered on the resin layer 3. -1Pre-sputtering under a vacuum degree of 2.6 Pa; placing fabric in the sputtering chamber, connecting the second target to a DC power supply with a sputtering power of 50 W, and connecting the fourth target to an RF power supply with a sputtering power of 8 W; the pressure in the chamber is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 20 sccm; performing dual-target sputtering simultaneously.

[0105] An Al target is selected as the third target material, and the second reflective layer 5 is sputtered on the transition layer 4. The third target material is connected to a DC power supply, the sputtering power is 160W, the gas pressure is 2.6Pa, the deposition atmosphere is pure argon, and the gas flow rate is 60sccm.

[0106] The fire-fighting fabric prepared in this embodiment has a 100μm base layer 1 (22wt% vinyl chloride fiber, 30wt% acrylonitrile fiber, 40wt% meta-aramid fiber, 8wt% copolymerized aramid fiber), a 110nm first reflective layer 2 (Al layer), a 70μm resin layer 3 (PTFE), an 8nm transition layer 4 (1.1wt% Fe-doped Ni layer), and a 307nm second reflective layer 5 (Al layer).

[0107] The fire-fighting fabric prepared in this embodiment was tested for performance:

[0108] The coating on the fabric surface did not fall off within less than 1500 frictions. The breaking strength is 32.5cN / dtex, the breaking elongation is 4.43%, and the thermal shrinkage is 4.2%. The air permeability is 611L / m2·d, and the moisture permeability is 6193g / m2·d. The thermal protection performance TPP is 40cal / cm2, and the thermal radiation protection performance RPP is 33cal / cm2. The flame retardant performance is 0s in the warp direction, 0s in the weft direction, 19mm in the warp direction, and 16mm in the weft direction.

[0109] Comparative Example 1

[0110] The meta-aramid fiber and the copolymerized aramid fiber were placed in a methacrylic chloride solution at 60° C. and etched for 60 minutes.

[0111] Take 18 parts of the etched meta-aramid fiber and 2 parts of the copolymerized aramid fiber, add 15 parts of vinyl chloride fiber and 15 parts of acrylonitrile fiber, blend and spin, and weave into a flexible fabric base layer 1.

[0112] Select Al target as the first target material, and sputter the first reflective layer 2 on the base layer 1. -1 Pre-sputtering under a vacuum degree of 1.6 Pa; the fabric is placed in the sputtering chamber, the first target is connected to a DC power supply, the sputtering power is 180 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 73 sccm.

[0113] Take PTFE resin slurry, apply a coating film on the first reflective layer 2, and then form a porous PTFE resin layer 3 through foaming and curing.

[0114] The first target material is continuously selected as an Al target, and the second reflective layer 5 is sputtered on the resin layer 3. The first target material is connected to a DC power supply, the sputtering power is 100 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon gas, and the gas flow rate is 50 sccm.

[0115] The fire-fighting fabric prepared in this embodiment has a 100μm base layer 1 (30wt% vinyl chloride fiber, 30wt% acrylonitrile fiber, 36wt% meta-aramid fiber, 4wt% copolymerized aramid fiber), a 460nm first reflective layer 2 (Al layer), a 70μm resin layer 3 (PTFE), and an 80nm second reflective layer 5 (Al layer).

[0116] The fire-fighting fabric prepared in this embodiment was tested for performance:

[0117] After 1000 frictions, the color of the fabric surface changes, accompanied by a small amount of dot-shaped and flake-shaped shedding. The breaking strength is 22.9cN / dtex, the breaking elongation is 13.66%, and the thermal shrinkage is 2.5%. The air permeability is 658L / m2·d, and the moisture permeability is 6470g / m2·d. The thermal protection performance TPP is 32cal / cm2, and the thermal radiation protection performance RPP is 21cal / cm2. The flame retardant performance is 0s in the warp direction, 0s in the weft direction, 22mm in the warp direction, and 19mm in the weft direction.

[0118] Comparative Example 2

[0119] A 100 μm meta-aramid film was used as the base layer 1 .

[0120] Select Al target as the first target material, and sputter the first reflective layer 2 on the base layer 1. -1 Pre-sputtering under a vacuum degree of 1.6 Pa; the fabric is placed in the sputtering chamber, the first target is connected to a DC power supply, the sputtering power is 180 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 73 sccm.

[0121] Take PTFE resin slurry, apply a coating film on the first reflective layer 2, and then form a porous PTFE resin layer 3 through foaming and curing.

[0122] At the same time, the second target material and the fourth target material are selected, wherein the second target material is a NiCr alloy target and the fourth target material is a Ti target, and the transition layer 4 is sputtered on the resin layer 3. -1Pre-sputtering under a vacuum degree of 0.2 Pa; placing fabric in the sputtering chamber, connecting the second target to a DC power supply with a sputtering power of 80 W, and connecting the fourth target to an RF power supply with a sputtering power of 8 W; the gas pressure in the chamber is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 30 sccm; performing dual-target sputtering simultaneously.

[0123] An Al target is selected as the third target material, and the second reflective layer 5 is sputtered on the transition layer 4. The third target material is connected to a DC power supply, the sputtering power is 100 W, the gas pressure is 2.6 Pa, the deposition atmosphere is pure argon, and the gas flow rate is 50 sccm.

[0124] The fire-fighting fabric prepared in this embodiment has a base layer 1 of 100 μm (100% meta-aramid film), a first reflective layer 2 of 460 nm (Al layer), a resin layer 3 of 70 μm (PTFE), a transition layer 4 of 23 nm (2.7 wt% Ti-doped NiCr alloy layer), and a second reflective layer 5 of 80 nm (Al layer).

[0125] The fire-fighting fabric prepared in this embodiment was tested for performance:

[0126] After 1000 frictions, the fabric surface changes color significantly, accompanied by spot and flake shedding. The breaking strength is 17.8cN / dtex, the breaking elongation is 11.54%, and the thermal shrinkage is 3.1%. The air permeability is 470L / m2·d, and the moisture permeability is 4664g / m2·d. The thermal protection performance TPP is 24cal / cm2, and the thermal radiation protection performance RPP is 32cal / cm2. The flame retardant performance is 0s in the warp direction, 0s in the weft direction, 34mm in the warp direction, and 33mm in the weft direction.

[0127] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. Aluminum-plated fire-fighting fabric, It is characterized in that It comprises a base layer (1), a first reflective layer (2), a resin layer (3), a transition layer (4), and a second reflective layer (5) which are arranged in sequence from bottom to top; The material of the base layer (1) is selected from aramid blended fibers; the aramid blended fibers include 15-40wt% of meta-aramid fibers, 2-10wt% of copolymerized aramid fibers, and 40-75wt% of chloronitrile fibers; The first reflective layer (2) and the second reflective layer (5) are both single-element metal layers; The transition layer (4) is a metal single substance layer, an alloy layer or a metal compound layer.

2. The aluminized fire fighting fabric according to claim 1, It is characterized in that The thickness of the base layer (1) is 5-500 μm; The nylon fiber includes polyvinyl chloride fiber and polyacrylonitrile fiber; the mass ratio of the polyvinyl chloride fiber to the polyacrylonitrile fiber is 0.5-1.

75.

3. The aluminized fire fighting fabric according to claim 1, It is characterized in that The mass ratio of the copolymerized aramid fiber to the meta-aramid fiber is 0.1-0.

2.

4. The aluminized fire fighting fabric according to claim 1, It is characterized in that The thickness of the first reflective layer (2) and the second reflective layer (5) are both 5-500 nm, and the thickness of at least one of the first reflective layer (2) and the second reflective layer (5) is 200-500 nm; The material of the first reflective layer (2) and the second reflective layer (5) is selected from at least one of Au, Ag, Cu, Al, Ti and Ni.

5. The aluminized fire fighting fabric according to claim 1, It is characterized in that The thickness of the resin layer (3) is 1-100 μm; the material of the resin layer (3) is selected from at least one of PI and PTFE.

6. The aluminized fire fighting fabric according to claim 1, It is characterized in that The thickness of the transition layer (4) is 5-25 nm; The material of the transition layer (4) is selected from Ni, Cr, NiCr alloy, TiN, TiO, TiO 2 At least one of .

7. The aluminized fire fighting fabric according to claim 6, It is characterized in that The transition layer (4) is doped with a doping metal, and the doping metal is selected from at least one of Ti, Fe, stainless steel, and Cu; the doping amount of the doping metal is 0.5-3wt%.

8. A method for preparing an aluminized fire-fighting fabric, for preparing the aluminized fire-fighting fabric as claimed in any one of claims 1 to 7, It is characterized in that The steps include: S1: spinning and weaving a blend of polyvinyl chloride fiber, acrylonitrile fiber, meta-aramid fiber and co-aramid fiber into a base layer (1); S2: depositing a first reflective layer (2) on the substrate layer (1); S3: coating and curing the first reflective layer (2) to form a resin layer (3); S4: depositing a transition layer (4) on the resin layer (3); S5: depositing a second reflective layer (5) on the transition layer (4).

9. The method for preparing the aluminized fire-fighting fabric according to claim 8, It is characterized in that In step S1, the meta-aramid fiber and the co-aramid fiber are subjected to surface etching treatment before mixed spinning, and the surface etching treatment step is: taking the meta-aramid fiber and the co-aramid fiber and immersing them in an etching solution for 30-60 minutes at 60-80° C.; the etching solution is selected from any one of methacryloyl chloride, acetic anhydride or phosphoric acid; In step S2, a first reflective layer (2) is deposited by magnetron sputtering: a metal single target is selected as the first target material, a DC power supply is connected, and the sputtering power is 50 to 200 W; the gas pressure in the sputtering chamber is 0.1 to 3.0 Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15 to 80 sccm; In step S4, a transition layer (4) is deposited by magnetron sputtering: a metal single substance target, an alloy target or a metal compound ceramic target is selected as the second target material, a DC power supply is connected, and the sputtering power is 30 to 100 W; the gas pressure in the sputtering chamber is 0.1 to 3.0 Pa, and the deposition atmosphere is argon, or a mixed gas of argon and oxygen, or a mixed gas of argon and nitrogen, and the gas flow rate is 15 to 40 sccm; In step S5, the second reflective layer (5) is deposited by magnetron sputtering: a metal single target is selected as the third target material, a DC power supply is connected, and the sputtering power is 50 to 200 W; the gas pressure in the sputtering chamber is 0.1 to 3.0 Pa, the deposition atmosphere is pure argon, and the argon flow rate is 15 to 80 sccm.

10. The method for preparing the aluminized fire-fighting fabric according to claim 9, It is characterized in that Step S4 also includes a fourth target material; the fourth target material is a metal target or an alloy target, connected to a radio frequency power supply, and the sputtering power is 5-10W.

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