High-silica fiber felt paper and preparation method and device thereof

Abstract

The present invention discloses a high-silica fiber felt paper and a preparation method and a preparation device thereof, and relates to the technical field of high-silica fiber felt. The high-silica fiber felt paper includes a first thermal insulation layer, a reinforcement thermal insulation layer, and a second thermal insulation layer from bottom to top, wherein the first thermal insulation layer is a mixture of high-silica fiber, a defoamer, a thickener, metal powder, and a hot-melt adhesive, the reinforcement thermal insulation layer is composed of textile fibers, a foaming agent, high-silica fiber, a hot-melt adhesive, and aluminum oxide particles, and the second thermal insulation layer is a mixture of high-silica fiber, a defoamer, a thickener, metal powder, and a hot-melt adhesive. The present invention arranges the high-silica fiber felt in a composite form of a first thermal insulation layer, a reinforcement thermal insulation layer, and a second thermal insulation layer, wherein a large number of bubbles exist in the reinforcement thermal insulation layer, and the shielding effect of the first thermal insulation layer and the second thermal insulation layer makes it difficult for the gas in the reinforcement thermal insulation layer to flow, thereby increasing the thermal insulation capacity of the high-silica fiber felt.

Description

Technical Field

[0001] The invention relates to the technical field of high-silica fiber felt, in particular to high-silica fiber felt paper and a preparation method and a preparation device thereof. Background Art

[0002] High silica fiber is an inorganic fiber with a silicon oxide content greater than 96%, and has good high temperature resistance. There are pores in some high silica fiber felts, and air can flow through the pores, resulting in unsatisfactory thermal insulation ability of the high silica fiber felt.

[0003] The defects of existing high silica fiber felt are:

[0004] 1. The prior art JPH0978359A discloses inorganic fibers and felts. The fiber felt produced by this technology has a small amount of static, non-flowing air. The heat insulating ability of the air is better than that of the inorganic fibers. The heat insulating ability of the fiber felt is not ideal. Therefore, a high-silica fiber felt paper containing a large amount of static, non-flowing air and a preparation method and a preparation device thereof are needed to solve this problem.

[0005] 2. The prior art JPH038857A discloses an inorganic fiber nonwoven fabric. There are pores between the inorganic fibers of this technology, and air can easily pass through the pores, which makes the thermal insulation ability of the product unsatisfactory. Therefore, a high-silica fiber felt paper and a preparation method and a preparation device thereof that can reduce the pores between the inorganic fibers and reduce air circulation are needed to solve this problem.

[0006] 3. Prior art EP0954419B1 discloses a non-woven inorganic fiber felt. The inorganic fibers in the inorganic fiber felt are non-woven, and there is no connection between the inorganic fibers. The inorganic fibers are easily separated from each other under the action of tension, which makes the felt easy to be broken. Therefore, a high-silica fiber felt paper with improved tensile strength of inorganic fibers and a preparation method and a preparation device thereof are needed to solve this problem.

[0007] 4. Prior art CN108166298B discloses a high-silica glass fiber felt and a preparation method thereof. In this technology, there is no strong supporting material between the high-silica fibers, and the high-silica fibers are easily squeezed and deformed, causing the internal air to flow to the outside. At the same time, the high-silica fiber felt is easily sheared and broken, and has a short life in harsh and collision-prone environments. Therefore, a high-silica fiber felt paper that is not easy to deform and is resistant to shearing, and a preparation method and a preparation device thereof are needed to solve this problem. Summary of the invention

[0008] One purpose of the present application is to provide a high-silica fiber felt paper and a preparation method and a preparation device thereof, which can solve the technical problems raised in the prior art.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-silica fiber felt paper and a preparation method and a preparation device thereof, wherein the high-silica fiber felt paper comprises, from bottom to top, a first thermal insulation layer, a reinforced thermal insulation layer and a second thermal insulation layer, wherein the first thermal insulation layer is formed by a mixture of high-silica fiber, a defoamer, a thickener, metal powder and a hot-melt adhesive, the reinforced thermal insulation layer is formed by a mixture of textile fibers, a foaming agent, high-silica fiber, a hot-melt adhesive and alumina particles, and the second thermal insulation layer is formed by a mixture of high-silica fiber, a defoamer, a thickener, metal powder and a hot-melt adhesive.

[0010] Preferably, the first thermal insulation layer and the second thermal insulation layer comprise, by weight, 90 to 95 parts of high-silica fiber, 1 to 2 parts of defoaming agent, 1 to 2 parts of thickener, 10 to 20 parts of metal powder and 5 to 10 parts of hot melt adhesive.

[0011] Preferably, the reinforced heat-insulating layer comprises, by weight, 5 to 10 parts of textile fibers, 1 to 2 parts of foaming agents, 30 to 50 parts of high-silica fibers, 10 to 20 parts of hot-melt adhesives and 10 to 20 parts of aluminum oxide particles.

[0012] Preferably, the defoaming agent is one of emulsified silicone oil, a high-carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropanolamine ether.

[0013] Preferably, the thickener is one of carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate and polyoxyethylene.

[0014] Preferably, the textile fiber is one of cotton fiber, nylon, polyester, acrylic, spandex, vinylon and polypropylene.

[0015] Preferably, the foaming agent is one of calcium carbonate, magnesium carbonate and sodium bicarbonate.

[0016] Preferably, the reinforced heat-insulating layer comprises textile fibers, foaming agent, high-silica fiber, hot-melt adhesive and metal powder by weight, and the metal powder is one of aluminum powder and copper powder.

[0017] Preferably, the method for preparing the high-silica fiber felt paper comprises the following steps:

[0018] Step a: putting high-silica fiber, defoamer, thickener and water into a stirring device 1 for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0019] Step b: adding a foaming agent, high-silica fiber, hot melt adhesive, alumina particles and water into a second stirring device with a heating device for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0020] Step c: adding the hot melt adhesive and the metal powder into a stirring device with a heating device for heating and stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a metal adhesive liquid;

[0021] Step d: using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0022] Step e: using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging the textile fibers at equal intervals longitudinally on the high-strength wet base paper, then arranging the textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0023] Step f: uniformly coating the metal glue in step c on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0024] Step g: lay the high-silica fiber wet base paper in step d with the side coated with metal glue upward on a flat plate to form a first thermal insulation layer, and then stick the high-strength wet base paper in step e on the first thermal insulation layer by gluing to form a reinforced thermal insulation layer, and then stick the side of the high-silica fiber wet base paper in step d coated with metal glue to the top of the reinforced thermal insulation layer by gluing to form a second thermal insulation layer to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0025] Preferably, the coating device in step f comprises a substrate 4, an electric telescopic rod 1 5, a connecting block 6, a lifting frame 7, an electric telescopic rod 2 8 and a fixing plate 9, the electric telescopic rod 1 5 is symmetrically installed on both sides of the substrate 4, the output end of the electric telescopic rod 1 5 is installed with a connecting block 6, one end of the connecting block 6 is installed with a lifting frame 7, the top of the lifting frame 7 is symmetrically installed with an electric telescopic rod 2 8, and the output end of the electric telescopic rod 2 8 is installed with a fixing plate 9;

[0026] The high-silica fiber wet virgin paper is installed inside the two lifting frames 7, and the electric telescopic rod 2 8 drives the fixing plate 9 to move downward to fix the high-silica fiber wet virgin paper. Then, the metal glue is coated on the high-silica fiber wet virgin paper and evenly scraped with a scraper. Then, the electric telescopic rod 1 5 drives the high-silica fiber wet virgin paper to move upward, so that the metal glue enters the pores of the high-silica fiber wet virgin paper under the action of gravity.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, the high-silica fiber felt is arranged in a composite form of a first thermal insulation layer, a reinforced thermal insulation layer and a second thermal insulation layer, a large number of bubbles are present in the reinforced thermal insulation layer, and the shielding effect of the first thermal insulation layer and the second thermal insulation layer makes it difficult for the gas in the reinforced thermal insulation layer to flow, thereby increasing the thermal insulation capacity of the high-silica fiber felt, and makes the reinforced thermal insulation layer in the high-silica fiber felt paper contain air that is difficult to flow, thereby increasing the thermal insulation capacity of the high-silica fiber felt.

[0029] 2. When the pores in the first thermal insulation layer and the second thermal insulation layer of the present invention are filled with metal mixed with glue, when the temperature increases, the metal will expand and further fill the gaps in the first thermal insulation layer and the second thermal insulation layer, thereby avoiding the exchange of air between the reinforced thermal insulation layer and the outside air, and the thermal insulation capacity of the product will increase. When the temperature of the high-silica fiber felt paper increases, the metal will expand and further fill the gaps in the first thermal insulation layer and the second thermal insulation layer, thereby avoiding the exchange of air between the reinforced thermal insulation layer and the outside air, and the thermal insulation capacity of the product will increase.

[0030] 3. In the present invention, long textile fibers are present in the reinforced insulation layer, and the tensile strength of the product is significantly improved, and it is not easy to be pulled apart, so that the tensile strength of the high-silica fiber felt paper is significantly improved, and it is not easy to be pulled apart.

[0031] 4. The present invention adds evenly dispersed metal oxides to the reinforced insulation layer of the high-silica fiber felt, so that the product has strong shear resistance and is not easily deformed or broken by squeezing, making the high-silica fiber felt paper have strong shear resistance and not easily deformed or broken by squeezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a three-dimensional diagram of the high-silica fiber felt paper of the present invention;

[0033] Figure 2 It is a schematic diagram of the substrate structure of the present invention;

[0034] Figure 3 It is a flow chart of the preparation method of the present invention.

[0035] In the figure: 1. first thermal insulation layer; 2. reinforced thermal insulation layer; 3. second thermal insulation layer; 4. base plate; 5. electric telescopic rod 1; 6. connecting block; 7. lifting frame; 8. electric telescopic rod 2; 9. fixing plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions 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 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 used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be indirectly connected 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 according to specific circumstances.

[0039] See also Figure 1 , Figure 2 and Figure 3 , an embodiment provided by the present invention: a high silica fiber felt paper and a preparation method and a preparation device thereof;

[0040] The high-silica fiber felt paper includes, from bottom to top, a first thermal insulation layer 1, a reinforced thermal insulation layer 2 and a second thermal insulation layer 3. The first thermal insulation layer 1 is composed of a mixture of high-silica fiber, a defoamer, a thickener, metal powder and a hot-melt adhesive. The reinforced thermal insulation layer 2 is composed of textile fibers, a foaming agent, high-silica fiber, a hot-melt adhesive and alumina particles. The hot-melt adhesive is an EVA hot-melt adhesive. The second thermal insulation layer 3 is composed of a mixture of high-silica fiber, a defoamer, a thickener, metal powder and a hot-melt adhesive.

[0041] The preparation method of high silica fiber felt paper comprises the following steps:

[0042] Step a: putting high-silica fiber, defoamer, thickener and water into a stirring device 1 for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0043] Step b: adding a foaming agent, high-silica fiber, hot melt adhesive, alumina particles and water into a second stirring device with a heating device for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0044] Step c: adding the hot melt adhesive and the metal powder into a stirring device with a heating device for heating and stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a metal adhesive liquid;

[0045] Step d: using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0046] Step e: using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging the textile fibers at equal intervals longitudinally on the high-strength wet base paper, then arranging the textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0047] Step f: uniformly coating the metal glue in step c on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0048] Step g: lay the high-silica fiber wet base paper in step d with the side coated with metal glue upward on a flat plate to form a first thermal insulation layer 1, and then stick the high-strength wet base paper in step e on the first thermal insulation layer 1 by gluing to form a reinforced thermal insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with metal glue to the top of the reinforced thermal insulation layer 2 by gluing to form a second thermal insulation layer 3, to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0049] The first heat insulating layer 1 and the second heat insulating layer 3 include 90 to 95 parts of high silica fiber, 1 to 2 parts of defoaming agent, 1 to 2 parts of thickener, 10 to 20 parts of metal powder and 5 to 10 parts of hot melt adhesive in parts by weight.

[0050] The reinforcement heat-insulating layer 2 comprises, by weight, 5 to 10 parts of textile fibers, 1 to 2 parts of foaming agents, 30 to 50 parts of high-silica fibers, 10 to 20 parts of hot-melt adhesives and 10 to 20 parts of aluminum oxide particles.

[0051] The defoaming agent is one of emulsified silicone oil, high carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropanolamine ether.

[0052] The thickener is one of carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate and polyoxyethylene.

[0053] The textile fiber is one of cotton fiber, nylon, polyester, acrylic, spandex, vinylon and polypropylene.

[0054] One of the foaming agents calcium carbonate, magnesium carbonate and sodium bicarbonate.

[0055] The reinforced heat-insulating layer 2 includes textile fibers, foaming agent, high-silica fiber, hot-melt adhesive and metal powder by weight, and the metal powder is one of aluminum powder and copper powder.

[0056] In step f, the coating device includes a substrate 4, an electric telescopic rod 1 5, a connecting block 6, a lifting frame 7, an electric telescopic rod 2 8 and a fixing plate 9. The electric telescopic rod 1 5 is symmetrically installed on both sides of the substrate 4, the connecting block 6 is installed on the output end of the electric telescopic rod 1 5, the lifting frame 7 is installed on one end of the connecting block 6, the electric telescopic rod 2 8 is symmetrically installed on the top of the lifting frame 7, and the fixing plate 9 is installed on the output end of the electric telescopic rod 2 8;

[0057] Method of using the coating device: install the high-silica fiber wet virgin paper inside the two lifting frames 7, and the electric telescopic rod 2 8 drives the fixing plate 9 to move downward to fix the high-silica fiber wet virgin paper, then coat the metal glue on the high-silica fiber wet virgin paper, and use a scraper to scrape it evenly, and then the electric telescopic rod 1 5 drives the high-silica fiber wet virgin paper to move upward, so that the metal glue enters the pores of the high-silica fiber wet virgin paper under the action of gravity.

[0058] Embodiment 1

[0059] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0060] 2. Put 1 part of foaming agent, 50 parts of high silica fiber, 20 parts of EVA hot melt adhesive, 20 parts of alumina particles and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0061] 3. Add EVA hot melt adhesive and metal aluminum powder into a stirring device with a heating device for heating and stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain aluminum powder adhesive solution;

[0062] 4. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0063] Fifth, using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging nylon fibers at equal intervals longitudinally on the high-strength wet base paper, and then arranging textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0064] 6. The aluminum powder glue in step c is evenly coated on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0065] 7. Lay the high-silica fiber wet base paper in step d with the side coated with aluminum powder glue upward on a flat plate to form a first insulation layer 1, and then stick the high-strength wet base paper in step e on the first insulation layer 1 by gluing to form a reinforced insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with aluminum powder glue to the top of the reinforced insulation layer 2 by gluing to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0066] Embodiment 2

[0067] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0068] 2. Put 1 part of foaming agent, 50 parts of high silica fiber, 20 parts of EVA hot melt adhesive, 20 parts of alumina particles and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0069] 3. Add EVA hot melt adhesive and metal aluminum powder into a stirring device with a heating device for heating and stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain aluminum powder adhesive solution;

[0070] 4. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0071] 5. Using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper;

[0072] 6. The aluminum powder glue in step c is evenly coated on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0073] 7. Lay the high-silica fiber wet base paper in step d with the side coated with aluminum powder glue upward on a flat plate to form a first insulation layer 1, and then stick the high-strength wet base paper in step e on the first insulation layer 1 by gluing to form a reinforced insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with aluminum powder glue to the top of the reinforced insulation layer 2 by gluing to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0074] Embodiment 3

[0075] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0076] 2. Put 1 part of foaming agent, 50 parts of high-silica fiber, 20 parts of EVA hot melt adhesive and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0077] 3. Add EVA hot melt adhesive and metal aluminum powder into a stirring device with a heating device for heating and stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain aluminum powder adhesive solution;

[0078] 4. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0079] Fifth, using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging nylon fibers at equal intervals longitudinally on the high-strength wet base paper, and then arranging textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0080] 6. The aluminum powder glue in step c is evenly coated on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0081] 7. Lay the high-silica fiber wet base paper in step d with the side coated with aluminum powder glue upward on a flat plate to form a first insulation layer 1, and then stick the high-strength wet base paper in step e on the first insulation layer 1 by gluing to form a reinforced insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with aluminum powder glue to the top of the reinforced insulation layer 2 by gluing to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0082] Embodiment 4

[0083] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0084] 2. Put 1 part of foaming agent, 50 parts of high silica fiber, 20 parts of EVA hot melt adhesive, 20 parts of alumina particles and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0085] 3. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0086] Fourth, using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, and then arranging nylon fibers at equal intervals longitudinally on the high-strength wet base paper, and then arranging textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0087] 5. Spread the high-silica fiber wet base paper in step d on a flat plate to form a first insulation layer 1, and then glue the high-strength wet base paper in step e to the first insulation layer 1 to form a reinforced insulation layer 2, and then glue the high-silica fiber wet base paper in step d to the top of the reinforced insulation layer 2 to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0088] Embodiment 5

[0089] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0090] 2. Put 2 parts of foaming agent, 50 parts of high silica fiber, 20 parts of EVA hot melt adhesive, 20 parts of alumina particles and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0091] 3. Add EVA hot melt adhesive and metal aluminum powder into a stirring device with a heating device for heating and stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain aluminum powder adhesive solution;

[0092] 4. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0093] Fifth, using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging nylon fibers at equal intervals longitudinally on the high-strength wet base paper, and then arranging textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0094] 6. The aluminum powder glue in step c is evenly coated on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0095] 7. Lay the high-silica fiber wet base paper in step d with the side coated with aluminum powder glue upward on a flat plate to form a first insulation layer 1, and then stick the high-strength wet base paper in step e on the first insulation layer 1 by gluing to form a reinforced insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with aluminum powder glue to the top of the reinforced insulation layer 2 by gluing to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0096] Embodiment 6

[0097] 1. Put 95 parts of high-silica fiber, 1 part of defoamer, 1 part of thickener and 100 parts of water into a stirring device 1 for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension;

[0098] 2. Put 50 parts of high-silica fiber, 20 parts of EVA hot melt adhesive, 20 parts of alumina particles and water into a stirring device 2 with a heating device for stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension;

[0099] 3. Add EVA hot melt adhesive and metal aluminum powder into a stirring device with a heating device for heating and stirring for 30 minutes at a stirring speed of 120 revolutions per minute to obtain aluminum powder adhesive solution;

[0100] 4. Using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper;

[0101] Fifth, using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging nylon fibers at equal intervals longitudinally on the high-strength wet base paper, and then arranging textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper;

[0102] 6. The aluminum powder glue in step c is evenly coated on the surface of the high-silica fiber wet base paper in step d through a coating device;

[0103] 7. Lay the high-silica fiber wet base paper in step d with the side coated with aluminum powder glue upward on a flat plate to form a first insulation layer 1, and then stick the high-strength wet base paper in step e on the first insulation layer 1 by gluing to form a reinforced insulation layer 2, and then stick the side of the high-silica fiber wet base paper in step d coated with aluminum powder glue to the top of the reinforced insulation layer 2 by gluing to form a second insulation layer 3 to obtain high-silica fiber felt, and then use a dryer to dry the high-silica fiber felt.

[0104] Performance Testing

[0105] 1. Thermal insulation test: The left side of the product of each embodiment was heated to 800°C using a heating device of the same power, and the temperature of the right side of the product was measured after 5 minutes;

[0106] 2. Shearing capacity: The products of each embodiment are sheared using a shearing machine with a pressure detection value to measure the maximum shearing pressure value that can be tolerated.

[0107] Performance test data sheet

[0108]

[0109] According to the experimental data, the prepared high-silica fiber felt paper has good thermal insulation performance and shear resistance. When there is a metal oxide content in the reinforced insulation layer 2, the product has strong shear resistance. When the foaming agent added in the reinforced insulation layer 2 increases, the thermal insulation capacity of the product is stronger. When the pores in the first insulation layer 1 and the second insulation layer 3 are filled with metal mixed with glue, when the temperature increases, the metal will expand and further fill the gap between the first insulation layer 1 and the second insulation layer 3, avoiding the exchange of air in the reinforced insulation layer with the outside air, and the thermal insulation capacity of the product will increase. At the same time, due to the presence of long textile fibers in the reinforced insulation layer 2, the tensile strength of the product is significantly improved.

[0110] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference signs in the claims should not be regarded as limiting the rights involved.

Claims

1. A high silica fiber felt paper, characterized in that: The high-silica fiber felt paper comprises, from bottom to top, a first thermal insulation layer (1), a reinforcement thermal insulation layer (2) and a second thermal insulation layer (3), wherein the first thermal insulation layer (1) is formed by mixing high-silica fiber, a defoamer, a thickener, metal powder and a hot melt adhesive, the reinforcement thermal insulation layer (2) is formed by mixing textile fiber, a foaming agent, high-silica fiber, a hot melt adhesive and alumina particles, and the second thermal insulation layer (3) is formed by mixing high-silica fiber, a defoamer, a thickener, metal powder and a hot melt adhesive; The preparation method of the high-silica fiber felt paper comprises the following steps: Step a: putting high-silica fiber, defoamer, thickener and water into a stirring device 1 for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-silica fiber suspension; Step b: adding a foaming agent, high-silica fiber, hot melt adhesive, alumina particles and water into a second stirring device with a heating device for stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a high-strength suspension; Step c: adding the hot melt adhesive and the metal powder into a stirring device with a heating device for heating and stirring for 10 to 30 minutes at a stirring speed of 120 revolutions per minute to obtain a metal adhesive liquid; Step d: using a papermaking machine to paper the high-silica fiber suspension in step a to form a high-silica fiber wet base paper; Step e: using a papermaking machine to paper the high-strength suspension in step b to form a high-strength wet base paper, then arranging the textile fibers at equal intervals longitudinally on the high-strength wet base paper, then arranging the textile fibers at equal intervals transversely on the high-strength wet base paper, and then immersing the equally spaced transverse and longitudinal textile fibers into the high-strength wet base paper; Step f: uniformly coating the metal glue in step c on the surface of the high-silica fiber wet base paper in step d through a coating device; Step g: the high-silica fiber wet base paper in step d is laid flat on a flat plate with the side coated with the metal glue facing upward to form a first thermal insulation layer (1), and then the high-strength wet base paper soaked with textile fibers in step e is adhered to the first thermal insulation layer (1) by gluing to form a reinforced thermal insulation layer (2), and then the side of the high-silica fiber wet base paper in step d coated with the metal glue is adhered to the top of the reinforced thermal insulation layer (2) by gluing to form a second thermal insulation layer (3), thereby obtaining a high-silica fiber felt, and then the high-silica fiber felt is dried using a dryer.

2. The high-silica fiber felt paper according to claim 1, characterized in that: The first heat insulation layer (1) and the second heat insulation layer (3) contain 90 to 95 parts of high-silica fiber, 1 to 2 parts of defoaming agent, 1 to 2 parts of thickener, 10 to 20 parts of metal powder and 5 to 10 parts of hot melt adhesive in parts by weight.

3. The high-silica fiber felt paper according to claim 1, characterized in that: The reinforced heat-insulating layer (2) comprises, by weight, 5 to 10 parts of textile fibers, 1 to 2 parts of foaming agent, 30 to 50 parts of high-silica fibers, 10 to 20 parts of hot-melt adhesive, and 10 to 20 parts of aluminum oxide particles.

4. The high-silica fiber felt paper according to claim 1, characterized in that: The defoaming agent is one of emulsified silicone oil, high-carbon alcohol fatty acid ester complex, polyoxyethylene polyoxypropylene pentaerythritol ether and polyoxyethylene polyoxypropanolamine ether.

5. The high-silica fiber felt paper according to claim 1, characterized in that: The thickener is one of carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate and polyoxyethylene.

6. The high-silica fiber felt paper according to claim 1, characterized in that: The textile fiber is one of cotton fiber, nylon, polyester, acrylic fiber, spandex, vinylon and polypropylene fiber.

7. The high-silica fiber felt paper according to claim 1, characterized in that: The foaming agent is one of calcium carbonate, magnesium carbonate and sodium bicarbonate.

8. A preparation device for high-silica fiber felt paper, suitable for the high-silica fiber felt paper according to claim 1, characterized in that: The coating device in step f comprises a substrate (4), an electric telescopic rod 1 (5), a connecting block (6), a lifting frame (7), an electric telescopic rod 2 (8) and a fixing plate (9), the electric telescopic rod 1 (5) being symmetrically mounted on both sides of the substrate (4), the connecting block (6) being mounted on the output end of the electric telescopic rod 1 (5), the lifting frame (7) being mounted on one end of the connecting block (6), the electric telescopic rod 2 (8) being symmetrically mounted on the top of the lifting frame (7), and the fixing plate (9) being mounted on the output end of the electric telescopic rod 2 (8); The high-silica fiber wet base paper is installed inside the two lifting frames (7), and the electric telescopic rod 2 (8) drives the fixing plate (9) to move downward to fix the high-silica fiber wet base paper. Then, the metal glue is coated on the high-silica fiber wet base paper and evenly scraped with a scraper. Then, the electric telescopic rod 1 (5) drives the high-silica fiber wet base paper to move upward, so that the metal glue enters the pores of the high-silica fiber wet base paper under the action of gravity.

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