Biodegradable inorganic fiber spraying thermal insulation material, preparation method and spraying method thereof, spraying equipment and ship component

Abstract

The invention relates to the technical field of inorganic fiber spraying materials, in particular to a biodegradable inorganic fiber spraying thermal insulation material and a preparation method and spraying method thereof, spraying equipment and a ship component. The biodegradable inorganic fiber spraying thermal insulation material comprises a component A, a component B and a component C, the component A comprises the following components in parts by weight: 8-12 parts of polyvinyl alcohol, 0.5-1 part of a silane coupling agent, 0.1-0.3 part of a mildew preventive and 80-90 parts of water; the component B comprises the following components in parts by weight: 5-15 parts of sodium borate, 5-15 parts of glycerol and 70-90 parts of water; the component C comprises bio-soluble refractory fibers. The biodegradable inorganic fiber spraying thermal insulation material provided by the invention has the characteristics of reducing construction procedures and reducing the influence on human health, and a refractory fiber thermal insulation layer formed by the biodegradable inorganic fiber spraying thermal insulation material has excellent fireproof performance and can meet the requirements of A-level fireproof separation in the third part of the international fire resistance test program application rules in 2010 published by the International Maritime Organization.

Description

Technical Field

[0001] The present application relates to the technical field of inorganic fiber spray materials, and in particular to a biodegradable inorganic fiber spray insulation material and a preparation method and spraying method, spraying equipment, and ship parts thereof. Background Art

[0002] When a ship is sailing in the waters, if a fire occurs, the outside rescue force cannot arrive in time, and the cabins are independent, the passages are narrow, and the firefighting capacity is limited. Therefore, the ship adopts the laying of fireproof materials to ensure the integrity of the ship structure fire protection and contain the fire in the fire source.

[0003] Traditional fireproof materials are rock wool felt and rock wool board, and their construction process is complicated. It is necessary to weld studs on the steel plate, remove rust and paint the stud area as a whole, lay the rock wool felt, and finally fasten the buckle.

[0004] In order to reduce the construction process, the existing scheme attempts to use inorganic fiber spraying technology to directly spray rock wool and adhesives on the fireproof area of ​​the cabin at the same time, without welding studs and locks. However, the refractory fibers (such as mineral wool, rock wool, aluminum silicate ceramic wool) and adhesives used for spraying are not friendly to the human body. Once inhaled into the lungs during spraying, it takes a long time to be completely discharged. The adhesive may contain free formaldehyde, which has a great impact on the health of the spraying operators. Summary of the invention

[0005] In order to solve the problems of the prior art mentioned in the above background technology, the present application provides a biodegradable inorganic fiber spray insulation material, which is composed of materials such as biosoluble refractory fibers and degradable polyvinyl alcohol adhesives. The solubility constant of the biosoluble refractory fibers in lung fluid is much greater than that of aluminum silicate ceramic fibers, and the half-disappearance period is much lower than that of aluminum silicate ceramic fibers. It can withstand higher temperatures, so it has little impact on human health and can meet the fire separation level requirements of ship bulkheads and ship decks. The technical solution of the biodegradable inorganic fiber spray insulation material is as follows: The biodegradable inorganic fiber spray insulation material provided by the present application includes component A, component B and component C; in terms of weight, the component A includes 8 to 12 parts of polyvinyl alcohol, 0.5 to 1 parts of silane coupling agent, 0.1 to 0.3 parts of mildew inhibitor, and 80 to 90 parts of water; the component B includes 5 to 15 parts of sodium borate, 5 to 15 parts of propylene glycol, and 70 to 90 parts of water; the component C includes biosoluble refractory fiber.

[0006] In some embodiments, it includes independently packaged component A, component B and component C; in terms of weight, the component A consists of 8 to 12 parts of polyvinyl alcohol, 0.5 to 1 parts of silane coupling agent, 0.1 to 0.3 parts of mildew inhibitor, and 80 to 90 parts of water; the component B consists of 5 to 15 parts of sodium borate, 5 to 15 parts of propylene glycol, and 70 to 90 parts of water; the component C consists of biosoluble refractory fiber.

[0007] In some embodiments, the degree of polymerization of the polyvinyl alcohol is 1700-2400, and the degree of alcoholysis is 86-99%; the silane coupling agent is a hydrophobic silane coupling agent; the mildew inhibitor is a low-toxic fungicide that does not contain formaldehyde; the sodium borate is sodium borax decahydrate or sodium borate tetrahydrate; the EU index of the biosoluble refractory fiber is >30, and its average diameter is ≤7μm.

[0008] In some embodiments, the polyvinyl alcohol is powdered PVA-1788; the silane coupling agent is one or more combinations of vinyl triethoxysilane, trimethoxymethylsilane, and isobutyl triethoxysilane; and the mildew inhibitor is an isothiazolinone mildew inhibitor.

[0009] The present application also provides a method for preparing the above-mentioned biodegradable marine inorganic fiber spray insulation material, which comprises the following preparation steps: The preparation process of component A is as follows: adding a portion of water to a reactor, adding polyvinyl alcohol to the water while stirring, heating to 60-90° C. after the polyvinyl alcohol is added, and continuously stirring at 60-90° C. to completely dissolve the polyvinyl alcohol to obtain a polyvinyl alcohol aqueous solution; mixing the remaining water, silane coupling agent, and mildew inhibitor uniformly, and then adding them to the polyvinyl alcohol aqueous solution, mixing uniformly, and thus obtaining component A; The preparation process of component B is as follows: water and propylene glycol are added into a reactor, sodium borate is added while stirring, and after the sodium borate is added, the mixture is heated to 60-90° C., and stirring is continued at 60-90° C. to completely dissolve the sodium borate, thereby obtaining the component B.

[0010] The present application also provides a method for spraying the biodegradable inorganic fiber spray insulation material as described above, which comprises the following steps: Dilute component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:(2-3); dilute component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:(4-5); The component A diluent and the component B diluent are sprayed simultaneously in a certain proportion to form a primer on the substrate; Dispense the component A diluent, the component B diluent and the component C at a certain ratio to spray on the primer; The biosoluble refractory fiber is then shaped; Finally, the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion to be sprayed on the surface of the shaped bio-soluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed.

[0011] In some embodiments, the component A diluent and the component B diluent are sprayed simultaneously in a weight ratio of (2.5-6):1 to form a base glue on the substrate; the component A diluent, the component B diluent and the component C diluent are discharged simultaneously in a weight ratio of (2.5-6):1:(3-9) to be sprayed on the base glue; and then the biosoluble refractory fiber attached to the substrate is patted with a shaping tool to make its surface smooth; finally, the component A diluent and the component B diluent are sprayed simultaneously in a weight ratio of (2.5-6):1 to spray on the surface of the shaped biosoluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed.

[0012] In some embodiments, a spraying device is provided; the spraying device comprises a cotton cabin for storing bio-soluble refractory fibers, a component A spraying device, and a component B spraying device; the component A spraying device and the component B spraying device are respectively used to transport and spray the component A dilution liquid and the component B dilution liquid; the cotton cabin is provided with a fiber discharge pipe for discharging soluble refractory fibers; The spraying method comprises the following steps: placing bio-soluble refractory fibers into a cotton cabin; opening a component A spraying device and a component B spraying device, so that a component A diluent and a component B diluent are sprayed out simultaneously in a certain proportion, so as to be sprayed on a substrate to form a base glue; then simultaneously opening the component A spraying device, the component B spraying device and the fiber discharge pipe, so that a component A diluent, a component B diluent and a component C diluent are discharged simultaneously in a certain proportion to be sprayed on the base glue; wherein, when the fiber discharge pipe is opened, the bio-soluble refractory fibers in the cotton cabin will be scattered and sprayed out; then, the bio-soluble refractory fibers attached to the substrate are patted with a shaping tool to make their surface flat; closing the fiber discharge pipe, and opening the component A spraying device and the component B spraying device, so that a component A diluent and a component B diluent are sprayed out simultaneously in a certain proportion to be sprayed on the surface of the shaped bio-soluble refractory fibers, and after drying, an inorganic fiber spray insulation layer is formed.

[0013] The present application also provides a spraying device for implementing the spraying method as described above, which includes a cotton cabin for storing bio-soluble refractory fibers, a component A spraying device, and a component B spraying device; wherein the component A spraying device and the component B spraying device are respectively used to transport and spray the component A dilution liquid and the component B dilution liquid; and a fiber discharge pipe for discharging soluble refractory fibers is provided on the cotton cabin.

[0014] The present application also provides a ship component, which includes a substrate and an inorganic fiber spray insulation layer formed on the surface of the substrate; wherein the inorganic fiber spray insulation layer is produced by the spraying method as described above.

[0015] Compared with the existing technology, the biodegradable inorganic fiber spray insulation material provided by the present application has the following beneficial effects: The biodegradable inorganic fiber spray insulation material provided in the present application has the characteristics of reducing construction procedures and reducing the impact on human health. The fire-resistant fiber insulation layer formed by it has excellent fire resistance and can meet the requirements of Class A fire separation in Part 3 of the 2010 International Fire Test Procedure Application Rules issued by the International Maritime Organization. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0017] Figure 1 A schematic diagram of the structure of the spraying equipment provided for this application; Figure 2 This is a schematic structural diagram of a substrate having a refractory fiber insulation layer on its surface prepared in the present application.

[0018] Figure ID: 1. Feed pipe for component A dilution liquid; 2. Feed pipe for component B dilution liquid; 3. Cotton cabin; 4. Discharge pipe for component A dilution liquid; 5. Discharge pipe for component B dilution liquid; 6. Discharge pipe for fiber; 7. Base material; 8. Refractory fiber insulation layer. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] The present application provides an operation example of a method for preparing a biodegradable inorganic fiber spray insulation material as follows: The preparation method comprises the following preparation steps: (1) The preparation process of component A is as follows: Add a portion of water to the reactor, add polyvinyl alcohol to the water while stirring, heat to 60-90° C. after the polyvinyl alcohol is added, and continue stirring at 60-90° C. to completely dissolve the polyvinyl alcohol to obtain a polyvinyl alcohol aqueous solution; mix the remaining water, silane coupling agent, and mildew inhibitor evenly, and then add them to the polyvinyl alcohol aqueous solution, mix evenly, and obtain the component A; (2) The preparation process of component B is as follows: Add water and propylene glycol into the reactor, add sodium borate while stirring, heat to 60-90° C. after the sodium borate is added, and continue stirring at 60-90° C. to completely dissolve the sodium borate, thereby obtaining the component B.

[0021] (3) The preparation process of component C is as follows: the biosoluble refractory fiber is packaged to obtain the product.

[0022] The above-mentioned component A, component B and component C are prepared separately.

[0023] Among them, the formula of each component is: The biodegradable inorganic fiber spray insulation material comprises independently packaged component A, component B and component C; in terms of weight, the component A consists of 8 to 12 parts of polyvinyl alcohol, 0.5 to 1 part of silane coupling agent, 0.1 to 0.3 part of mildew inhibitor, and 80 to 90 parts of water; the component B consists of 5 to 15 parts of sodium borate, 5 to 15 parts of propylene glycol, and 70 to 90 parts of water; and the component C consists of biosoluble refractory fiber.

[0024] Among them, the polyvinyl alcohol used is polyvinyl alcohol with medium-high polymerization degree and partial alcoholysis, with a polymerization degree of 1700-2400 and an alcoholysis degree of 86-99%; preferably, powdered PVA-1788. The silane coupling agent used is a silane coupling agent with hydrophobic effect, preferably one or more combinations of vinyl triethoxysilane, trimethoxymethylsilane, and isobutyl triethoxysilane. The mildew inhibitor used is a low-toxic fungicide that does not contain formaldehyde, preferably an isothiazolinone mildew inhibitor, such as Rohm and Haas LXE fungicide. The sodium borate used is sodium borax decahydrate or sodium borate tetrahydrate; the EU index of the biosoluble refractory fiber used is>30, and its average diameter is ≤7μm.

[0025] It should be noted that the EU index of biosoluble refractory fiber KNB=(Na2O+K2O+CaO+MgO+BaO)*100, the oxide content in the equation is mass percentage, and the specific source of the EU index refers to the EU "Dangerous Goods Guide (Directive 97 / 69 / EC).

[0026] like Figure 1-2 As shown: This application also provides a spraying method for biodegradable inorganic fiber spray insulation material, and an example of the spraying equipment used during the spraying is as follows: 1. The spraying equipment structure provided is; like Figure 1 As shown, the spraying equipment includes a cotton cabin 3 for storing bio-soluble refractory fibers, a component A spraying device, and a component B spraying device; the component A spraying device and the component B spraying device are respectively used to transport and spray the component A dilution liquid and the component B dilution liquid; the cotton cabin 3 is provided with a fiber discharge pipe 6 for discharging soluble refractory fibers.

[0027] The cotton chamber 3 is provided with a feed port (not shown in the figure), a fiber discharge pipe 6, and a pump body (not shown in the figure) for pressurizing and pumping the fibers in the cotton chamber 3 to the fiber discharge pipe 6 for discharge. The fiber discharge pipe 6 is connected to the cotton chamber 3. When the fiber discharge pipe is opened, the biosoluble refractory fibers in the cotton chamber will be dispersed and sprayed out; The component A spraying device is used to transport and spray the component A diluent; it includes a component A diluent feed pipe 1, a component A diluent discharge pipe 4 connected to the component A diluent feed pipe 1, and a feed pump (not shown in the figure) used to pump the component A diluent from the component A diluent feed pipe 1 to the component A diluent discharge pipe 4 for spraying.

[0028] The component B spraying device is used to transport and spray the component B dilution liquid; it includes a component B dilution liquid feed pipe 2, a component B dilution liquid discharge pipe 5 connected to the component B dilution liquid feed pipe 2, and a feed pump (not shown in the figure) used to pump the component B dilution liquid from the component B dilution liquid feed pipe 2 to the component B dilution liquid discharge pipe 5 for spraying.

[0029] 2. The spraying method comprises the following steps: Step (1): Dilution Dilute component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:(2-3); dilute component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:(4-5); Step (2), placing the biosoluble refractory fiber into the cotton cabin 3; Step (3), opening the component A dilution discharge pipe 4 of the component A spraying device and the component B dilution discharge pipe 5 of the component B spraying device, and two feed pumps transport the component A dilution and the component B dilution to the component A dilution discharge pipe 4 and the component B dilution discharge pipe 5 respectively, so that the component A dilution and the component B dilution are sprayed simultaneously in a certain ratio to form a primer on the substrate 7; The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a weight ratio of (2.5-6):1.

[0030] Step (4), simultaneously opening the component A spraying device, the component B spraying device, the pump body on the cotton cabin 3 and the fiber discharge pipe 6, so that the component A dilution liquid, the component B dilution liquid and the component C are discharged at a certain ratio to be sprayed on the base glue; wherein, when the fiber discharge pipe 6 is opened, the biosoluble refractory fibers in the cotton cabin 3 will be scattered and sprayed; The component A diluent, the component B diluent and the component C are discharged simultaneously in a weight ratio of (2.5-6):1:(3-9).

[0031] Step (5), then using a shaping tool to pat the biosoluble refractory fiber attached to the substrate 7 to make its surface smooth and reach the designed thickness; Step (6), closing the fiber discharge pipe 6, and opening the component A spraying device and the component B spraying device, so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion to be sprayed on the surface of the shaped biosoluble refractory fiber. After drying, an inorganic fiber spray insulation layer is formed, and the inorganic fiber spray insulation layer can provide a fireproof function for the substrate 7.

[0032] The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a weight ratio of (2.5-6):1.

[0033] The structure of the substrate 7 having the refractory fiber insulation layer 8 on the surface after the spraying operation is finally obtained is as follows: Figure 2 As shown, a refractory fiber insulation layer 8 is formed on the surface of the substrate 7.

[0034] It should be noted that: The inorganic fiber spray insulation material of the present application is sprayed on the ship parts to form a fire-resistant fiber insulation layer, which can be used for ship fire prevention. According to the above design concept, it is not limited to spraying on ships. The inorganic fiber spray insulation material of the present application can be used for spraying on substrates 7, parts or equipment that require fire-resistant functional coatings.

[0035] In addition, the inorganic fiber spray insulation material of the present application is sprayed on ship steel plates for use, but according to the above design concept, the inorganic fiber spray insulation material can also be used for spraying on substrates 7 of other materials, including but not limited to steel.

[0036] The present application also provides the following embodiments and comparative examples: Example 1 1. The preparation process of biodegradable inorganic fiber spray insulation material is: (1) The preparation process of component A is as follows: By weight, add 72 parts of water into the dissolving kettle, start stirring, slowly add 8 parts of polyvinyl alcohol PVA1788 powder, turn on the heating function after adding, heat to 60°C, and continue stirring for about 60 minutes to completely dissolve the polyvinyl alcohol.

[0037] Take another container, add 19.4 parts of water, 0.5 parts of vinyl triethoxy silane, and 0.1 parts of Rohm and Haas LXE fungicide, stir evenly, add to the dissolved polyvinyl alcohol aqueous solution, stir evenly to obtain component A.

[0038] (2) The preparation process of component B is as follows: Add 90 parts of water and 5 parts of propylene glycol into a dissolving kettle, start stirring, add 5 parts of sodium borate, turn on the heating function after adding, heat to 60°C, continue stirring for about 15 minutes, until the sodium borate is completely dissolved, to obtain component B.

[0039] (3) The preparation process of component C is as follows: the biosoluble refractory fiber is packaged to obtain the product.

[0040] The sodium borate used is sodium borate decahydrate, the EU index of the biosoluble refractory fiber used is >30, and the average diameter thereof is ≤7 μm.

[0041] 2. The spraying method comprises the following steps: Step (1), diluting component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:2; diluting component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:4; Step (2), placing biosoluble refractory fibers into the cotton cabin; Step (3), opening the component A dilution discharge pipe of the component A spraying device and the component B dilution discharge pipe of the component B spraying device, and two feed pumps transport the component A dilution and the component B dilution to the component A dilution discharge pipe and the component B dilution discharge pipe respectively, so that the component A dilution and the component B dilution are sprayed simultaneously in a certain ratio to form a primer on the steel plate substrate; The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed out simultaneously at a weight ratio of 2.6:1.

[0042] Step (4), simultaneously opening the component A spraying device, the component B spraying device, the pump body on the cotton cabin and the fiber discharge pipe, so that the component A diluent, the component B diluent and the component C are discharged at the same time in a certain proportion to be sprayed on the base glue; wherein, when the fiber discharge pipe is opened, the biosoluble refractory fibers in the cotton cabin will be scattered and sprayed out; Among them, the component A dilution liquid, the component B dilution liquid and the component C are discharged simultaneously in a weight ratio of 2.6:1:3.

[0043] Step (5), then using a shaping tool to pat the biosoluble refractory fiber attached to the substrate to make its surface flat and reach the designed thickness; Step (6), close the fiber discharge pipe, and open the component A spraying device and the component B spraying device, so that the component A diluent and the component B diluent are sprayed simultaneously in a certain ratio, so as to be sprayed on the surface of the shaped biosoluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed, and the inorganic fiber spray insulation layer can provide a fireproof function for the substrate. The pumping pressure of the spraying equipment is adjusted so that the component A diluent and the component B diluent are sprayed simultaneously in a weight ratio of 3:1.

[0044] The overall thickness after spraying in step (6) is 3 cm.

[0045] Example 2 1. The preparation process of biodegradable inorganic fiber spray insulation material is: (1) The preparation process of component A is as follows: By weight, add 85.5 parts of water into the dissolving kettle, start stirring, slowly add 9.5 parts of polyvinyl alcohol PVA1788 powder, turn on the heating function after adding, heat to 90°C, and continue stirring for about 60 minutes to completely dissolve the polyvinyl alcohol.

[0046] Take another container, add 4 parts of water, 0.8 parts of vinyl triethoxysilane, and 0.2 parts of Rohm and Haas LXE fungicide, stir evenly, add to the dissolved polyvinyl alcohol aqueous solution, stir evenly to obtain component A.

[0047] (2) The preparation process of component B is as follows: Add 80 parts of water and 10 parts of propylene glycol into a dissolving kettle, start stirring, add 10 parts of sodium borate, turn on the heating function after adding, heat to 90°C, continue stirring for about 15 minutes, until the sodium borate is completely dissolved, to obtain component B.

[0048] (3) The preparation process of component C is as follows: the biosoluble refractory fiber is packaged to obtain the product.

[0049] The sodium borate used is sodium borate decahydrate, the EU index of the biosoluble refractory fiber used is >30, and the average diameter thereof is ≤7 μm.

[0050] 2. The spraying method comprises the following steps: Step (1), diluting component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:2.5; diluting component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:4.5; Step (2), placing biosoluble refractory fibers into the cotton cabin; Step (3), opening the component A dilution discharge pipe of the component A spraying device and the component B dilution discharge pipe of the component B spraying device, and two feed pumps transport the component A dilution and the component B dilution to the component A dilution discharge pipe and the component B dilution discharge pipe respectively, so that the component A dilution and the component B dilution are sprayed simultaneously in a certain ratio to form a primer on the steel plate substrate; The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed out simultaneously at a weight ratio of 4.5:1.

[0051] Step (4), simultaneously opening the component A spraying device, the component B spraying device, the pump body on the cotton cabin and the fiber discharge pipe, so that the component A diluent, the component B diluent and the component C are discharged at the same time in a certain proportion to be sprayed on the base glue; wherein, when the fiber discharge pipe is opened, the biosoluble refractory fibers in the cotton cabin will be scattered and sprayed out; Among them, the component A dilution liquid, the component B dilution liquid and the component C are discharged simultaneously in a weight ratio of 4.5:1:8.

[0052] Step (5), then using a shaping tool to pat the biosoluble refractory fiber attached to the substrate to make its surface flat and reach the designed thickness; Step (6), closing the fiber discharge pipe, and opening the component A spraying device and the component B spraying device, so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion, so as to be sprayed on the surface of the shaped biosoluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed, and the inorganic fiber spray insulation layer can provide a fireproof function for the substrate.

[0053] The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed out simultaneously at a weight ratio of 4.5:1.

[0054] The overall thickness after spraying in step (6) is 3 cm.

[0055] Example 3 1. The preparation process of biodegradable inorganic fiber spray insulation material is: (1) The preparation process of component A is as follows: By weight, add 80.3 parts of water into the dissolving kettle, start stirring, slowly add 12 parts of polyvinyl alcohol PVA1788 powder, turn on the heating function after adding, heat to 75°C, and continue stirring for about 60 minutes to completely dissolve the polyvinyl alcohol.

[0056] Take another container, add 6.4 parts of water, 1 part of vinyl triethoxysilane, and 0.3 parts of Rohm and Haas LXE fungicide, stir evenly, add to the dissolved polyvinyl alcohol aqueous solution, stir evenly to obtain component A.

[0057] (2) The preparation process of component B is as follows: Add 70 parts of water and 15 parts of propylene glycol into a dissolving kettle, start stirring, add 15 parts of sodium borate, turn on the heating function after adding, heat to 75°C, continue stirring for about 15 minutes, until the sodium borate is completely dissolved, to obtain component B.

[0058] (3) The preparation process of component C is as follows: the biosoluble refractory fiber is packaged to obtain the product.

[0059] The sodium borate used is sodium borate decahydrate, the EU index of the biosoluble refractory fiber used is >30, and the average diameter thereof is ≤7 μm.

[0060] 2. The spraying method comprises the following steps: Step (1), diluting component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:3; diluting component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:5; Step (2), placing biosoluble refractory fibers into the cotton cabin; Step (3), opening the component A dilution discharge pipe of the component A spraying device and the component B dilution discharge pipe of the component B spraying device, and two feed pumps transport the component A dilution and the component B dilution to the component A dilution discharge pipe and the component B dilution discharge pipe respectively, so that the component A dilution and the component B dilution are sprayed simultaneously in a certain ratio to form a primer on the steel plate substrate; The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed out simultaneously at a weight ratio of 5.8:1.

[0061] Step (4), simultaneously opening the component A spraying device, the component B spraying device, the pump body on the cotton cabin and the fiber discharge pipe, so that the component A diluent, the component B diluent and the component C are discharged at the same time in a certain proportion to be sprayed on the base glue; wherein, when the fiber discharge pipe is opened, the biosoluble refractory fibers in the cotton cabin will be scattered and sprayed out; Among them, the component A dilution liquid, the component B dilution liquid and the component C are discharged simultaneously in a weight ratio of 5.8:1:8.7.

[0062] Step (5), then using a shaping tool to pat the biosoluble refractory fiber attached to the substrate to make its surface flat and reach the designed thickness; Step (6), closing the fiber discharge pipe, and opening the component A spraying device and the component B spraying device, so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion, so as to be sprayed on the surface of the shaped biosoluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed, and the inorganic fiber spray insulation layer can provide a fireproof function for the substrate.

[0063] The pumping pressure of the spraying equipment is adjusted so that the component A dilution liquid and the component B dilution liquid are sprayed out simultaneously at a weight ratio of 5.8:1.

[0064] The overall thickness after spraying in step (6) is 3 cm.

[0065] The inorganic fiber spray insulation layers prepared in the above examples and comparative examples were subjected to the following performance tests, and the test results were obtained, as shown in Table 1 below: Table 1 Performance data of the embodiment project Example 1 Example 2 Example 3 Test standards Non-flammable qualified qualified qualified 2010 FTP Annex 1 Part 1 A-60 Fire separation pass pass pass 2010 FTP Annex 1 Part 3 From the test results we can see that: The present application adopts a three-component formula design, and forms a three-dimensional network-like refractory fiber insulation layer by spraying the three components on the ship steel plate. The formed three-dimensional network-like refractory fiber insulation layer is a non-combustible material and can meet the requirements of A-60 class fire separation in Part 3 of the 2010 International Fire Test Procedure Application Rules issued by the International Maritime Organization.

[0066] The biodegradable inorganic fiber spray insulation material provided in this application has at least the following design concepts and beneficial effects: (1) In this application, component C uses biosoluble refractory fiber. The solubility constant of biosoluble refractory fiber in lung fluid is much greater than that of traditional aluminum silicate ceramic fiber, and the half-disappearance period is much lower than that of aluminum silicate ceramic fiber. It has little impact on human health and can withstand higher temperatures, meeting the fire separation level requirements of ship bulkheads and ship decks.

[0067] (2) The polyvinyl alcohol used in component A of the present application is a biodegradable polymer that is completely soluble in water and does not require a surfactant as an emulsifier, making it superior to commonly used adhesives in the form of emulsions.

[0068] (3) In the present application, component A adopts a silane coupling agent with a hydrophobic effect, which can enhance the strength of the biosoluble refractory fiber cotton and form a hydrophobic effect on its surface, thereby meeting the hydrophobic requirements in the humid environment of the ship.

[0069] Beneficial effects: The biodegradable inorganic fiber spray insulation material provided by the present application has a refractory fiber insulation layer formed therein with excellent fireproof performance, and the material can form a refractory fiber insulation layer on the surface of the substrate by a spraying process, which can effectively reduce the construction process. Compared with the traditional method of directly spraying rock wool and adhesive on the fireproof area by using inorganic fiber spraying technology, the biodegradable inorganic fiber spray insulation material of the present application has less impact on human health during spraying.

[0070] The biodegradable inorganic fiber spray insulation material has the characteristics of reducing construction procedures and reducing the impact on human health, and can meet the requirements of Class A fire separation in Part 3 of the 2010 International Fire Test Procedure Application Rules issued by the International Maritime Organization.

[0071] It should be noted that: In this article, “~” is used to indicate a numerical range, and the range indicated by this expression includes two endpoint values.

[0072] In addition to the actual selections embodied in the above specific embodiments, the above formulation ranges may be used in the specific implementation of the present application, including but not limited to the above embodiment schemes.

[0073] The specific parameters or some commonly used reagents or raw materials in the above embodiments are specific embodiments or preferred embodiments of the present application, but are not intended to limit the present application. Those skilled in the art may make adaptive adjustments within the scope of the present application.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A biodegradable inorganic fiber spray insulation material, characterized in that: It includes component A, component B and component C; In parts by weight, the component A comprises 8 to 12 parts of polyvinyl alcohol, 0.5 to 1 part of a silane coupling agent, 0.1 to 0.3 part of a mildew preventer, and 80 to 90 parts of water; The component B comprises 5 to 15 parts of sodium borate, 5 to 15 parts of propylene glycol, and 70 to 90 parts of water; The C component includes biosoluble refractory fibers.

2. The biodegradable inorganic fiber spray insulation material according to claim 1, characterized in that: It includes independently packaged component A, component B and component C; In parts by weight, the component A is composed of 8 to 12 parts of polyvinyl alcohol, 0.5 to 1 part of a silane coupling agent, 0.1 to 0.3 parts of a mildew preventer, and 80 to 90 parts of water; The component B is composed of 5 to 15 parts of sodium borate, 5 to 15 parts of propylene glycol, and 70 to 90 parts of water; The third component is composed of biosoluble refractory fibers.

3. The biodegradable inorganic fiber spray insulation material according to claim 1, characterized in that: The degree of polymerization of the polyvinyl alcohol is 1700-2400, and the degree of alcoholysis is 86-99%; The silane coupling agent is a hydrophobic silane coupling agent; The mildew inhibitor is a low-toxic fungicide that does not contain formaldehyde; The sodium borate is sodium borax decahydrate or sodium borate tetrahydrate; The EU index of the biosoluble refractory fiber is greater than 30, and the average diameter thereof is less than or equal to 7 μm.

4. The biodegradable inorganic fiber spray insulation material according to claim 3, characterized in that: The polyvinyl alcohol is powdered PVA-1788; The silane coupling agent is one or more combinations of vinyl triethoxysilane, trimethoxymethyl silane and isobutyl triethoxy silane; The mildew preventer is an isothiazolinone mildew preventer.

5. A method for preparing the biodegradable marine inorganic fiber spray insulation material according to any one of claims 1 to 4, characterized in that: The method comprises the following preparation steps: The preparation process of component A is: Add a portion of water to the reactor, add polyvinyl alcohol to the water while stirring, heat to 60-90° C. after the polyvinyl alcohol is added, and continue stirring at 60-90° C. to completely dissolve the polyvinyl alcohol to obtain a polyvinyl alcohol aqueous solution; mix the remaining water, silane coupling agent, and mildew inhibitor evenly, and then add them to the polyvinyl alcohol aqueous solution, mix evenly, and obtain the component A; The preparation process of component B is: Add water and propylene glycol into the reactor, add sodium borate while stirring, heat to 60-90° C. after the sodium borate is added, and continue stirring at 60-90° C. to completely dissolve the sodium borate, thereby obtaining the component B.

6. A method for spraying the biodegradable inorganic fiber spray insulation material according to any one of claims 1 to 4, characterized in that: The following steps are involved: Dilute component A with water to form a component A dilution liquid, wherein the ratio of component A to water is 1:(2-3); dilute component B with water to form a component B dilution liquid, wherein the ratio of component B to water is 1:(4-5); The component A diluent and the component B diluent are sprayed simultaneously in a certain proportion to form a primer on the substrate; Dispense the component A diluent, the component B diluent and the component C at a certain ratio to spray on the primer; The biosoluble refractory fiber is then shaped; Finally, the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion to be sprayed on the surface of the shaped bio-soluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed.

7. The spraying method of the biodegradable inorganic fiber spray insulation material according to claim 6, characterized in that: The component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a weight ratio of (2.5-6):1 to form a primer on the substrate; Dispense the diluted liquid of component A, the diluted liquid of component B and the pre-dispersed component C at a weight ratio of (2.5-6):1:(3-9) simultaneously to spray on the primer; Then, the biosoluble refractory fibers attached to the substrate are patted with a shaping tool to make the surface smooth; Finally, the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a weight ratio of (2.5-6):1 to be sprayed on the surface of the shaped biosoluble refractory fiber, and after drying, an inorganic fiber spray insulation layer is formed.

8. The spraying method of the biodegradable inorganic fiber spray insulation material according to any one of claims 6 to 7, characterized in that: A spraying device is provided; the spraying device comprises a cotton cabin for storing bio-soluble refractory fibers, a component A spraying device, and a component B spraying device; the component A spraying device and the component B spraying device are respectively used to transport and spray the component A dilution liquid and the component B dilution liquid; the cotton cabin is provided with a fiber discharge pipe for discharging soluble refractory fibers; The spraying method comprises the following steps: Place biosoluble fire-resistant fibers into the cotton cabin; Turn on the component A spraying device and the component B spraying device, so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion, so as to be sprayed on the substrate to form a primer; Then, the component A spraying device, the component B spraying device and the fiber discharge pipe are simultaneously opened, so that the component A diluent, the component B diluent and the component C are discharged at a certain ratio to be sprayed on the base glue; wherein, when the fiber discharge pipe is opened, the biosoluble refractory fiber in the cotton cabin will be scattered and sprayed out; Then, the biosoluble refractory fibers attached to the substrate are patted with a shaping tool to make the surface smooth; Close the fiber discharge pipe, and open the component A spraying device and the component B spraying device, so that the component A dilution liquid and the component B dilution liquid are sprayed simultaneously in a certain proportion to spray on the surface of the shaped biosoluble refractory fiber. After drying, an inorganic fiber spray insulation layer is formed.

9. A spraying device for implementing the spraying method according to any one of claims 6 to 7, characterized in that: It includes a cotton cabin for storing biosoluble fire-resistant fibers, a component A spraying device, and a component B spraying device; The component A spraying device and the component B spraying device are used to transport and spray the component A diluent and the component B diluent respectively; the cotton cabin is provided with a fiber discharge pipe for discharging soluble refractory fibers.

10. A ship component, characterized in that: It includes a substrate and an inorganic fiber spray insulation layer formed on the surface of the substrate; Wherein, the inorganic fiber spray insulation layer is prepared by the spraying method as described in any one of claims 6-8.

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