Heat insulating fireproof door incorporating composite material laminated with ceramics and rockwool

Abstract

The present invention relates to a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, and more specifically, provides a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, which is installed inside the heat-insulating fire door for thermal insulation and strength reinforcement, and comprises two rock wool sheets and a ceramic sheet laminated between the two rock wool sheets.

Description

Technology Field

[0001] The present invention relates to a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated. More specifically, by using two layers of rock wool as the outer layer and placing ceramics between the two layers of rock wool to install a composite material in which rock wool and ceramics are laminated, the invention ensures both strength and heat resistance simultaneously by applying rock wool, which has excellent adhesion to the steel plate of the fire door and high strength, and ceramics, which are prone to brittle fracture but have excellent heat resistance. In particular, by utilizing fire-retardant paint when combining the rock wool and ceramics, the invention provides a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, thereby ensuring fire resistance and enhancing adhesion. Background Technology

[0003] Fire doors are classified into thermal insulation and non-thermal insulation types. Non-thermal insulation fire doors are used in public buildings in Korea, while thermal insulation fire doors are adopted only in evacuation spaces of apartments. Both thermal insulation and non-thermal insulation fire doors utilize rock wool as a filler, and are approved for use as fire doors if they withstand flames for more than one hour.

[0004] However, rock wool has the property of being difficult to withstand strong heat for a long period of time, so in long-term heating environments, it is used to cope by adjusting the thickness of the rock wool. That is, rock wool that can withstand flames for 1 hour has a thickness of, for example, 65 mm, rock wool that can withstand them for 2 hours has a thickness of, for example, 85 mm, and rock wool that can withstand them for 3 hours has a thickness of, for example, 120 mm.

[0005] However, there is a problem in that the volume increases as the rock wool becomes thicker, and it is difficult to move and transport. Furthermore, during construction, it is cumbersome because the thickness of the fire door must be considered in accordance with the thickness of the rock wool. Prior art literature

[0007] Republic of Korea Published Patent Application No. 2012-0020744 (March 8, 2012) The problem to be solved

[0008] The present invention has been devised to solve the problems of the aforementioned prior art. The present invention aims to provide a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, so that the thickness of the heat-insulating fire door can be kept constant, thereby eliminating the need to consider variations in the thickness of the fire door corresponding to the thickness of the rock wool during construction.

[0009] In addition, another objective of the present invention is to provide a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, which allows the thickness of the heat-insulating fire door to be reduced, making it easy to move or transport.

[0010] In addition, another objective of the present invention is to provide a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, thereby ensuring sufficient heat resistance even with a thin thickness by adopting ceramics as the filler material of the heat-insulating fire door.

[0011] In addition, another objective of the present invention is to provide a heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, which can secure high fire resistance performance and adhesive strength by using fire-resistant paint containing heat-resistant components as an adhesive between a rock wool sheet and a ceramic sheet instead of a general ceramic adhesive. means of solving the problem

[0013] To achieve the aforementioned objectives, the present invention provides a heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized by being installed inside the heat-insulating fire door for thermal insulation and strength reinforcement, and comprising two rock wool sheets and a ceramic sheet laminated between the two rock wool sheets.

[0014] The above ceramic sheet is preferably ceramic wool.

[0015] The composite material in which the above rock wool sheet and ceramic sheet are laminated preferably has a thickness in the range of 40 to 60 mm.

[0016] It is preferable that the above rock wool sheet has a thickness of 5 to 10 mm, and the above ceramic sheet has a thickness in the range of 30 to 40 mm.

[0017] It is preferable that the above rock wool sheet and ceramic sheet be bonded using fire-retardant paint.

[0018] It is preferable that the above fireproof paint further contains sodium silicate or potassium silicate.

[0019] It is preferable that the sodium silicate or potassium silicate be mixed in an amount of 4 to 17 weight percent relative to the weight of the fireproof paint.

[0020] It is preferable that the above fireproof paint be water-soluble so that the sodium silicate or potassium silicate can be dissolved. Effects of the invention

[0022] According to the present invention as described above, the thickness of the heat-insulating fire door can be kept constant, so an operational effect is expected where there is no need to consider changes in the thickness of the fire door corresponding to the thickness of the rock wool during construction.

[0023] In addition, the present invention allows for a thinner thickness of the heat-insulating fire door, which is expected to facilitate movement or transportation.

[0024] In addition, the present invention is expected to have the effect of ensuring sufficient heat resistance even with a thin thickness by adopting ceramics as the filler material of the heat-insulating fire door.

[0025] In addition, by using fire-retardant paint containing heat-resistant components as an adhesive between the rock wool sheet and the ceramic sheet instead of general ceramic adhesive, it is expected to have the effect of ensuring high fire resistance performance and adhesive strength. Brief explanation of the drawing

[0027] FIG. 1 is a cross-sectional view of a composite material embedded in a heat-insulating fire door according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a composite material embedded in a heat-insulating fire door according to one embodiment of the present invention. Figure 3 is a cross-sectional view showing a comparison of the thickness of a conventional fire door with only rock wool applied and a heat-insulating fire door with the composite material of the present invention embedded therein. Specific details for implementing the invention

[0028] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0029] Throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0030] In addition, terms such as "…part," "…unit," etc., as described in the specification refer to a unit that processes at least one function or operation.

[0032] FIG. 1 is a cross-sectional view of a composite material embedded in a heat-insulating fire door according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of a composite material embedded in a heat-insulating fire door according to one embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a comparison of the thickness of a conventional fire door with only rock wool applied and a heat-insulating fire door with the composite material of the present invention embedded therein.

[0034] As illustrated in FIGS. 1 and 2, the heat-insulating fire door of the present invention incorporates a composite material in which ceramics and rock wool are laminated as fillers, said composite material is installed inside the frame (110) of the heat-insulating fire door for thermal insulation and strength reinforcement, and includes two rock wool sheets (120) and a ceramic sheet (130) laminated between said two rock wool sheets (120).

[0035] The rock wool sheet (120) has lower heat resistance compared to the ceramic sheet (130). Therefore, when the filler is composed solely of the rock wool sheet (120), the thickness increases as the heat resistance time increases during the heat resistance performance test. This presents problems such as the need to manufacture fire doors of various thicknesses and difficulties in moving and transporting the rock wool sheet (120) as it becomes thicker.

[0036] In contrast, the composite material of the present invention has the advantage of having a ceramic sheet (130) that primarily performs a heat-resistant function, thereby ensuring heat resistance despite the thin thickness of the composite material, while the rock wool sheet (120) has excellent adhesion to the frame of the fire door and can support the ceramic sheet (130) well together with the fire door frame.

[0037] That is, as illustrated in FIG. 3, when the thickness is t1 when the filler is composed only of conventional rock wool sheets, and when the thickness is t2 when the filler is composed of the composite material according to the present invention, the relationship t1 > t2 is established.

[0038] Here, the ceramic sheet (130) is preferably ceramic wool. Ceramic wool is formed into a roll shape by laminating ceramic fibers and then stitching and punching, thereby ensuring flexibility. The temperature at which heat resistance is ensured is a high temperature range of 1260°C to 1600°C. The temperature at which heat resistance is ensured for the rock wool sheet (120) is about 600°C, which is lower than that of ceramic wool, so the heat resistance is provided by the ceramic wool rather than the rock wool sheet (120).

[0039] Ceramic wool offers the functions of shortening construction time and reducing labor costs due to its ease of installation and excellent workability. It also enables fuel cost savings through superior thermal insulation, and its stability is recognized as it is composed of high-purity alumina (Al2O3) and silica (SiO2) and is resistant to chemicals such as acids and alkalis.

[0040] The composite material in which the above-mentioned rock wool sheet (120) and ceramic sheet (130) are laminated preferably has a thickness in the range of 40 to 60 mm. If the thickness is less than 40 mm, it is difficult to secure adequate heat resistance, and if it exceeds 60 mm, it becomes unnecessarily thick and is not easy to handle. Therefore, the thickness of the composite material has critical significance within the above numerical range.

[0041] Meanwhile, the above rock wool sheet (120) preferably has a thickness of 5 to 10 mm, and the above ceramic sheet (130) preferably has a thickness of 30 to 40 mm, and the ratio of the thickness of the rock wool sheet to the thickness of the ceramic sheet (130) is in the range of 4:1 to 6:1.

[0042] Meanwhile, in the present invention, fire-retardant paint is applied to bond the rock wool sheet and the ceramic sheet together. The paint contains pigments that impart color and opacity, a binder (resin) used as a polymer to fix the pigments, an extender that adds larger pigment particles to improve adhesion, strengthen the film, and save binder, a solvent (thinner) used to lower viscosity, and additives used to modify the properties of the liquid paint and the dried film.

[0043] The above additives may include dispersants, silicones, thixotropic agents, drying agents, antisedimentation agents, disinfectants, algae removers, etc.

[0044] Fire-resistant paints can be classified into paints that do not easily ignite or burn when heat or flame is applied, and fireproof paints that do not easily ignite or burn due to high heat or flame, and do not explode by blocking heat through the insulating layer film of the paint during a fire, thereby preventing gas from easily being generated by high heat.

[0045] The double fire-retardant paint contains a paint in which a flame retardant for synthetic resin-based plastics and an organic solvent are added as a vehicle, or a component in which inorganic mineral powder is additionally added to this paint to improve flame retardancy.

[0046] In particular, a component acting as a ceramic binder was added among the mineral powders, which is in the form of silicon combined with an alkaline substance, such as sodium silicate and potassium silicate. That is, sodium silicate or potassium silicate was mixed into the fireproof paint and used as an adhesive to bond the rock wool sheet and the ceramic sheet.

[0047] Sodium silicate and potassium silicate are also called soluble silicates due to their high solubility in water. They are inorganic compounds in which silica (SiO2) and alkali metals (M2O) are bonded in various molar ratios. Generally, they contain water within their structure and are represented by the molecular formula M2O-nSiO2-xH2O. Because of their solubility in water, they are also called water glass.

[0048] Sodium silicate or potassium silicate is produced by mixing sodium carbonate (Na2CO3) or potassium carbonate (K2CO3) with silica (SiO2) and melting it at around 1200°C. The glass produced in this way dissolves in water under high temperature and high pressure to become a transparent, viscous liquid.

[0049] The above sodium silicate or potassium silicate is mixed in an amount of 4 to 17 weight percent relative to the weight of the fire-retardant paint. If added in an amount less than 4 weight percent, it is difficult to expect an improvement in adhesion, and if applied in an amount exceeding 17 weight percent, the viscosity becomes too high, causing gelation within the fire-retardant paint and resulting in poor mixing with the paint. Furthermore, due to its characteristic of expanding upon heating, it becomes a factor that weakens the interlayer bonding strength; thus, the above figures have critical significance within the above range. This is a matter confirmed experimentally and can be said to be scientifically supported.

[0050] Since sodium silicate and potassium silicate have a heat resistance of approximately 700 to 800°C, white ceramic powders such as alumina and zirconia must be mixed to withstand temperatures of 1000°C or higher. In other words, additional ceramic powder can be mixed to further increase heat resistance, and in this case, the amount of sodium silicate and potassium silicate added can be increased to maintain appropriate adhesion. However, if color is not considered, the types of ceramic powders added can be expanded to include titania, silicon carbide, silicon nitride, mullite, magnesia, etc., so the ceramic powder is not limited to the above white ceramic powders.

[0051] Sodium silicate and potassium silicate can be used in solid or liquid form; the solid form is, for example, a powder, and the liquid form is, for example, a sol.

[0052] The relative specific gravity of sodium silicate or potassium silicate and ceramic powder is preferably in a ratio of 6:4 to 8:3 based on weight.

[0053] In this case, it was experimentally confirmed that it could faithfully perform the role of a binder at room temperature, maintained heat resistance at temperatures of 800℃ to 1500℃ during fire resistance testing, did not deteriorate in adhesion, did not show changes in state such as oxidation, and maintained a strong adhesive state between the rock wool sheet and the ceramic sheet.

[0055] It should be noted that the above-described embodiments are for illustrative purposes only and are not intended to be limiting. Furthermore, a person skilled in the art will understand that various embodiments are possible within the scope of the technical concept of the present invention. Explanation of the symbols

[0057] 100 : Heat-insulating fire door 110 : Heat-insulating fire door frame 120 : Rock wool sheet 130 : Ceramic sheet

Claims

Claim 1 A heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized by being installed inside the heat-insulating fire door for thermal insulation and strength reinforcement, and comprising two rock wool sheets and a ceramic sheet laminated between the two rock wool sheets. Claim 2 A heat-insulating fire door containing a composite material laminated with ceramics and rock wool, characterized in that, in claim 1, the ceramic sheet is ceramic wool. Claim 3 A heat-insulating fire door containing a composite material laminated with ceramics and rock wool, characterized in that, in claim 1, the composite material laminated with the rock wool sheet and the ceramic sheet has a thickness in the range of 40 to 60 mm. Claim 4 A heat-insulating fire door containing a composite material in which ceramics and rock wool are laminated, characterized in that, in paragraph 3, the rock wool sheet has a thickness of 5 to 10 mm and the ceramic sheet has a thickness in the range of 30 to 40 mm. Claim 5 A heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized in that, in claim 1, the rock wool sheet and the ceramic sheet are bonded using fire-retardant paint when bonded. Claim 6 A heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized in that, in claim 5, the fire-resistant paint further includes sodium silicate or potassium silicate. Claim 7 A heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized in that, in claim 6, the sodium silicate or potassium silicate is mixed in an amount of 4 to 17 weight percent relative to the weight of the fire-retardant paint. Claim 8 A heat-insulating fire door containing a composite material of laminated ceramics and rock wool, characterized in that, in claim 6, the fireproof paint is water-soluble so that the sodium silicate or potassium silicate can be dissolved.

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