A heat-resistant, heat-dissipating and breathable composite film and a method for making the same

Abstract

The present invention relates to the technical field of fire protection, and in particular to a heat-resistant, heat-dissipating and breathable composite membrane, comprising a substrate cloth, a porous silicon layer, and a heat-conducting layer, wherein the porous silicon layer and the heat-conducting layer are respectively attached to both sides of the substrate cloth through a freeze-drying process, the substrate cloth is waterproof and breathable, the porous silicon layer and the heat-conducting layer are porous sponge-like after the freeze-drying process, the porous silicon layer can isolate the high temperature from being conducted to the substrate cloth, and the heat-conducting layer can conduct the temperature of the substrate cloth to the other side. The present invention also discloses a method for making a heat-resistant, heat-dissipating and breathable composite membrane. The beneficial effects of the present invention are: by arranging the porous silicon layer and the heat-conducting layer on both sides of the substrate cloth, the porous silicon layer can isolate the high temperature, the heat-conducting layer can delay the conduction of the high temperature, avoid the damage caused by the high temperature when the porous silicon layer is damaged, take measures to buy time for the porous silicon layer to be damaged, and the porous silicon layer and the heat-conducting layer become soft and convenient for sewing.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting, and in particular to a heat-resistant, heat-dissipating and breathable fire extinguisher and a manufacturing method thereof. Background Art

[0002] Porous silicon has excellent thermal insulation properties. One side of it can withstand temperatures of 1,200 degrees Celsius, while the other side can be grasped by hand. Currently, there are not many products that use the thermal insulation properties of porous silicon, mainly because porous silicon is not easy to process into products. Summary of the invention

[0003] In order to solve the problems in the above-mentioned background technology, the present invention provides a heat-resistant, heat-dissipating and breathable composite membrane for firefighting clothing, and solves the problem of porous silicon being easily damaged and ineffective in the prior art.

[0004] The solution adopted by the present invention to solve the technical problem is: a heat-resistant, heat-dissipating and breathable composite membrane, comprising a substrate cloth, a porous silicon layer and a thermally conductive layer, wherein the porous silicon layer and the thermally conductive layer are respectively attached to both sides of the substrate cloth through a freeze-drying process, the substrate cloth is waterproof and breathable, the porous silicon layer and the thermally conductive layer are in a porous sponge shape after the freeze-drying process, the porous silicon layer can isolate high temperature from being conducted to the substrate cloth, and the thermally conductive layer can conduct the temperature of the substrate cloth to the other side of the thermally conductive layer.

[0005] Furthermore, the base cloth is made of high temperature resistant and fire resistant material.

[0006] Furthermore, the base cloth is woven from polytetrafluoroethylene threads.

[0007] Furthermore, the heat conductive layer is polysiloxane.

[0008] A method for preparing a heat-resistant, heat-dissipating and breathable composite film comprises the following steps:

[0009] 1) preparing a silicon-containing solution, preparing a silicon source material into a silicon-containing solution according to the requirements of porous silicon, and placing the silicon-containing solution in a flat-bottom container, wherein the bottom of the flat-bottom container is placed horizontally;

[0010] 2) placing the substrate cloth on the silicon-containing solution, spreading the substrate cloth flatly, and placing the edges of the substrate cloth on a flat-bottomed container;

[0011] 3) Pour silicone emulsion on top of the base cloth. The silicone emulsion is formulated according to the requirements of the heat conductive layer.

[0012] 4) Put the silicon-containing solution and the silica gel emulsion in the flat-bottom container into a freeze dryer to remove the water in the silicon-containing solution and the silica gel emulsion through a freeze drying process, so that the silicon-containing solution forms a porous porous silicon layer, and the silica gel emulsion forms a porous heat-conducting layer;

[0013] 5) placing the substrate cloth and the porous silicon layer and the heat-conducting layer thereon into a high-temperature furnace for high-temperature treatment to vulcanize the porous silicon layer and the heat-conducting layer, and cutting off the edge of the substrate cloth to which the porous silicon layer and the heat-conducting layer are not attached;

[0014] The silicon-containing solution is ethyl polysilicate solution, silane solution or silicic acid solution, and the silicone emulsion is polysiloxane.

[0015] Furthermore, the silicone emulsion is added with a vinyl platinum complex as a catalyst so as to be vulcanized at room temperature.

[0016] Further, the freeze-drying process comprises the following steps:

[0017] 1. Pre-freezing stage: put the silicon-containing solution and silica gel emulsion in the flat-bottom container into the freeze dryer, lower the temperature to -10℃ to -5℃ and keep it for 2 hours to completely freeze the water in the flat-bottom container into a solid;

[0018] 2. Sublimation drying stage: the temperature is lowered to -25°C to -10°C, and the pressure in the freeze dryer is controlled at 0.5 atmospheres for 12 to 24 hours by a vacuum pump, so that the ice in the flat-bottomed container is directly sublimated into water vapor, thereby removing the free water in the flat-bottomed container;

[0019] 3. Re-drying stage: The temperature is lowered to -50℃ to -25℃, and the pressure in the freeze dryer is controlled at 0.3 atmospheres for 24 to 72 hours through a vacuum pump, so that the ice in the flat-bottomed container is directly sublimated into water vapor, thereby removing the bound water in the flat-bottomed container.

[0020] In summary, the beneficial effects of the present invention are as follows: by arranging a porous silicon layer and a heat-conductive layer on both sides of the base cloth, the porous silicon layer can isolate high temperature, and the heat-conductive layer can delay high-temperature conduction, thereby avoiding damage caused by high temperature when the porous silicon layer is damaged, and buying time for taking measures to damage the porous silicon layer. The base cloth with the porous silicon layer and the heat-conductive layer is the cloth for making fire-fighting clothing, which can protect firefighters from high-temperature damage. The porous silicon layer and the heat-conductive layer become soft and convenient for sewing because of the porousness.

[0021] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a structural diagram of the composite membrane of the present invention;

[0023] Figure 2 It is a three-dimensional diagram of the flat bottom container of the present invention.

[0024] In the figure: 1. substrate cloth; 2. porous silicon layer; 3. heat conductive layer; 4. flat bottom container; 5. bottom; 6. side wall. DETAILED DESCRIPTION

[0025] In order to make the content of the present invention more clearly understood, the present invention is further described below based on specific embodiments in conjunction with the accompanying drawings.

[0026] It should be noted that the terms "center", "upper", "lower", "front", "back", "left", "right", "inner", "outer" and the like used herein to indicate directions or positional relationships are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Unless otherwise specified, "plurality" means two or more.

[0027] 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] Referring to the accompanying drawings, a heat-resistant, heat-dissipating and breathable composite membrane includes a substrate cloth 1, a porous silicon layer 2, and a thermally conductive layer 3, wherein the porous silicon layer 2 and the thermally conductive layer 3 are respectively attached to both sides of the substrate cloth 1 through a freeze-drying process, the substrate cloth 1 is waterproof and breathable, the porous silicon layer 2 and the thermally conductive layer 3 are porous sponge-like after the freeze-drying process, the porous silicon layer 2 can isolate the high temperature from being conducted to the substrate cloth 1, and the thermally conductive layer 3 can conduct the temperature of the substrate cloth 1 to the other side of the thermally conductive layer 3.

[0029] Furthermore, the base cloth 1 is made of high temperature resistant and fire resistant material.

[0030] Furthermore, the base fabric 1 is woven from polytetrafluoroethylene threads.

[0031] Furthermore, the heat-conducting layer 3 is polysiloxane. When polysiloxane acts on the bone protuberance, it can reduce 42-47% of the pressure and 30% of the shear force, effectively preventing the occurrence of pressure sores. Polysiloxane is a porous sponge-like elastomer that is vulcanized at room temperature using condensed hydroxyl-terminated silicone rubber as the base material and vinyl platinum complex as the catalyst.

[0032] A method for preparing a heat-resistant, heat-dissipating and breathable composite film comprises the following steps:

[0033] 1) preparing a silicon-containing solution, preparing a silicon source material into a silicon-containing solution according to the requirements of porous silicon, and placing the silicon-containing solution in a flat-bottom container 4, wherein the bottom 5 of the flat-bottom container 4 is placed horizontally; the greater the concentration of silicon-containing compounds in the silicon-containing solution, the smaller the pore size;

[0034] 2) placing the substrate cloth 1 on the silicon-containing solution, spreading the substrate cloth 1 flatly, and placing the edges of the substrate cloth 1 on the side wall 6 of the flat-bottom container 4;

[0035] 3) Pour silicone emulsion on top of the base fabric 1. The silicone emulsion is formulated according to the requirements of the heat-conducting layer 3. The higher the concentration of silicone in the silicone emulsion, the smaller the pore size.

[0036] 4) The silicon-containing solution and the silica gel emulsion in the flat-bottom container 4 are placed in a freeze dryer to remove moisture from the silicon-containing solution and the silica gel emulsion through a freeze drying process, so that the silicon-containing solution forms a porous porous silicon layer 2, and the silica gel emulsion forms a porous heat-conducting layer 3;

[0037] 5) Place the substrate cloth 1 and the porous silicon layer 2 and the thermally conductive layer 3 thereon into a high temperature furnace for high temperature treatment to vulcanize the porous silicon layer 2 and the thermally conductive layer 3, and cut off the edge of the substrate cloth 1 to which the porous silicon layer 2 and the thermally conductive layer 3 are not attached.

[0038] Furthermore, the silicon-containing solution is ethyl polysilicate solution or silane solution or silicic acid solution, and the silica gel emulsion is polysiloxane.

[0039] Furthermore, the silicone emulsion is added with a vinyl platinum complex as a catalyst so as to be vulcanized at room temperature.

[0040] Further, the freeze-drying process comprises the following steps:

[0041] 1. Pre-freezing stage: put the silicon-containing solution and silica gel emulsion in the flat-bottom container 4 into the freeze dryer, lower the temperature to -10°C to -5°C, and completely freeze the water in the flat-bottom container 4 into a solid;

[0042] 2. Sublimation drying stage: the temperature is lowered to -25°C to -10°C, and the pressure in the freeze dryer is controlled at 0.5 atmospheres for 12 to 24 hours by a vacuum pump, so that the ice in the flat-bottomed container 4 is directly sublimated into water vapor, thereby removing the free water in the flat-bottomed container 4;

[0043] 3. Re-drying stage: the temperature is lowered to -50°C to -25°C, and the pressure in the freeze dryer is controlled at 0.3 atmospheres for 24 to 72 hours by a vacuum pump, so that the ice in the flat-bottomed container 4 is directly sublimated into water vapor, thereby removing the bound water in the flat-bottomed container 4, that is, the adsorbed water that is strongly bound to the solid.

[0044] The present invention arranges a porous silicon layer 2 and a heat-conducting layer 3 on a substrate cloth 1, so that the porous silicon layer 2 on the composite membrane can isolate high temperature, and the heat-conducting layer 3 can transfer the temperature of the substrate cloth 1 to the other side, so that the human body or the temperature sensor can sense the failure or damage of the porous silicon layer 2 and take measures, and the heat-conducting layer 3 can avoid damage to the human body or the temperature sensor. The substrate cloth 1 with the porous silicon layer 2 and the heat-conducting layer 3 is a fabric for making firefighting clothing, which can protect firefighters from high temperature damage. Specifically, it has the following beneficial effects:

[0045] 1. The present invention arranges a porous silicon layer 2 and a heat-conducting layer 3 on a substrate cloth 1, so that the porous silicon layer 2 on the composite membrane can isolate high temperature, and the heat-conducting layer 3 can transfer the temperature of the substrate cloth 1 to the other side, so that the human body or the temperature sensor can sense the failure or damage of the porous silicon layer 2 and take measures, and the heat-conducting layer 3 can avoid damage to the human body or the temperature sensor. The substrate cloth 1 with the porous silicon layer 2 and the heat-conducting layer 3 is a cloth for making firefighting clothing. The porous silicon layer 2 can withstand a high temperature of 1200 degrees Celsius, which is far higher than the temperature of ordinary flames, and can protect firefighters from high temperature injuries;

[0046] 2. By making the heat-conducting layer 3 porous, the fire-fighting clothing is made lighter and softer;

[0047] 3. By providing the heat-conducting layer 3, the fire-fighting clothing can also be insulated when the porous silicon layer 2 is damaged, so as not to directly burn the human skin. Since the porous silicon layer 2 will directly contact with the high-temperature object, and the porous silicon layer 2 is porous, it is very easy to get caught in sharp places and be pulled and damaged;

[0048] 4. By attaching the porous silicon layer 2 to the substrate cloth 1, the porous silicon layer 2 is resistant to pulling, which is convenient for sewing clothes and making items such as fire-fighting clothing;

[0049] 5. By setting the heat-conducting layer 3 to conduct heat, the fire-fighting clothing can be heat-insulated when the porous silicon layer 2 is damaged, but can also conduct heat, so that the human body or temperature sensor can know that the porous silicon layer 2 is damaged and take measures, so as not to directly burn the human skin;

[0050] 6. The porous silicon layer 2 and the heat-conducting layer 3 are placed in a freeze dryer and attached to both sides of the substrate cloth 1 through a freeze-drying process. The porous silicon layer 2, the heat-conducting layer 3 and the substrate cloth 1 have a large attachment area, strong adhesion, and are tightly combined, and can be folded many times without separation.

[0051] The embodiments described above are only preferred implementation modes of the present invention and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and modifications made by those skilled in the art on the basis of the invention shall fall within the protection scope of the present invention.

Claims

1. A method for preparing a heat-resistant, heat-dissipating, breathable composite film, characterized in that: The following steps are involved: 1) preparing a silicon-containing solution, preparing a silicon source material into a silicon-containing solution according to the requirements of porous silicon, and placing the silicon-containing solution in a flat-bottom container, wherein the bottom of the flat-bottom container is placed horizontally; 2) placing a substrate cloth on the silicon-containing solution, spreading the substrate cloth flatly, and placing the edges of the substrate cloth on the flat-bottom container; 3) Pour silicone emulsion on top of the substrate cloth, wherein the silicone emulsion is prepared according to the requirements of the heat conductive layer; 4) placing the silicon-containing solution and the silica gel emulsion in the flat-bottom container into a freeze dryer to remove moisture from the silicon-containing solution and the silica gel emulsion through a freeze drying process, so that the silicon-containing solution forms a porous porous silicon layer, and the silica gel emulsion forms a porous heat-conducting layer; 5) placing the substrate cloth and the porous silicon layer and the heat-conducting layer thereon into a high-temperature furnace for high-temperature treatment to vulcanize the porous silicon layer and the heat-conducting layer, and cutting off the edges of the substrate cloth to which the porous silicon layer and the heat-conducting layer are not attached; The silicon-containing solution is ethyl polysilicate solution or silane solution or silicic acid solution, and the silica gel emulsion is polysiloxane.

2. The method according to claim 1, characterized in that: The freeze-drying process comprises the following steps: 1) Pre-freezing stage: putting the silicon-containing solution and the silica gel emulsion in the flat-bottom container into a freeze dryer, lowering the temperature to -10°C to -5°C and maintaining it for 2 hours, so that the water in the flat-bottom container is completely frozen into a solid; 2) Sublimation drying stage: the temperature is lowered to -25°C to -10°C, and the pressure in the freeze dryer is controlled at 0.5 atmospheres for 12 to 24 hours by a vacuum pump, so that the ice in the flat-bottom container is directly sublimated into water vapor, thereby removing the free water in the flat-bottom container; 3) Re-drying stage: The temperature is lowered to -50°C to -25°C, and the pressure in the freeze dryer is controlled at 0.3 atmospheres for 24 to 72 hours by a vacuum pump, so that the ice in the flat-bottomed container is directly sublimated into water vapor, thereby removing the bound water in the flat-bottomed container.

3. The method according to claim 1, characterized in that: The silicone emulsion is added with a vinyl platinum complex as a catalyst so as to be vulcanized at room temperature.

4. A heat-resistant, heat-dissipating and breathable composite film prepared by the preparation method according to claim 1, characterized in that: It includes a substrate cloth, a porous silicon layer, and a heat-conducting layer, wherein the porous silicon layer and the heat-conducting layer are respectively attached to both sides of the substrate cloth through a freeze-drying process, the substrate cloth is waterproof and breathable, and the porous silicon layer and the heat-conducting layer are porous sponge-like after the freeze-drying process, the porous silicon layer can isolate high temperature from being conducted to the substrate cloth, and the heat-conducting layer can conduct the temperature of the substrate cloth to the other side of the heat-conducting layer.

5. The composite membrane according to claim 4, characterized in that: The base cloth is made of high temperature resistant and fire resistant material.

6. The composite membrane according to claim 5, characterized in that: The base cloth is woven from polytetrafluoroethylene threads.

7. The composite membrane according to claim 4, characterized in that: The heat-conductive layer is polysiloxane.

Images