Sealing material

Abstract

To provide a sealing material that can close a gap between itself and a contacted body and exhibit a flame and smoke blocking function.SOLUTION: A sealing material for closing a gap and improving airtightness by coming into contact with a contacted body, the sealing material including a base material, a fluff body formed of a plurality of pile yarns erected on one surface of the base material so as to extend in a length direction of the base material, and a fire-resistant resin composition formed of a resin containing thermally expandable graphite that is provided integrally with the base material and starts to expand with an increase in temperature, wherein the fire-resistant resin composition is provided by being bonded so as to cover a back surface on a side opposite to the one surface of the base material.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a sealing material. [Background technology]

[0002] An airtight material is known that is arranged between a beam and a ceiling forming material of a building to improve the airtightness of the building, and includes a surface-shaped base material that defines a longitudinal direction and a width direction perpendicular to the longitudinal direction, the base material including a first edge portion extending in the longitudinal direction, a second edge portion opposite the first edge portion, and an easily deformable portion between the first edge portion and the second edge portion, the first edge portion having an attachment portion formed thereon for attachment to the underside of the beam, and the easily deformable portion deforms so as to reduce the width dimension of the base material when the second edge portion receives a force directed toward the first edge portion (Patent Document 1).

[0003] A sealing material for a shutter device is also known, which is interposed between each side of the shutter and each support frame in a shutter device having a pair of support frames arranged in parallel at a predetermined distance apart, and a shutter whose both side portions are supported by each support frame so that it can move back and forth along the longitudinal direction of each support frame, and which comprises a base material attached to the surface of each support frame facing each side of the shutter, and a plurality of pile threads standing on the base material, and in which the height of some of the pile threads above the base material is lower than the height of the other pile threads above the base material (Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-70928 [Patent Document 2] Japanese Patent Application Laid-Open No. 2012-188857 Summary of the Invention [Problem to be solved by the invention]

[0005] To provide a sealing material that can close a gap with a contacted body and also has a function of blocking flames and smoke. [Means for solving the problem]

[0006] In order to solve the above problem, the sealing material according to claim 1 is A sealing material that comes into contact with a contacted body to close a gap and improve airtightness, A substrate; a pile body made of a plurality of pile yarns standing on one surface of the base material and extending in the longitudinal direction of the base material; and a fire-resistant resin composition comprising a resin containing thermally expandable graphite that is integrally provided on the substrate and begins to expand with a rise in temperature. It is characterized by:

[0007] The invention described in claim 2 is the sealing material described in claim 1, The fire-resistant resin composition is adhered to the back surface of the substrate so as to cover the back surface opposite to the one surface of the substrate. It is characterized by:

[0008] The invention described in claim 3 is the sealing material described in claim 1, The fire-resistant resin composition is adhered to the back surface of the substrate so as to surround the substrate from the back surface side opposite to the one surface of the substrate. It is characterized by:

[0009] The invention of claim 4 is the sealing material of claim 1, The fire-resistant resin composition is molded into a shape that surrounds the entire substrate. It is characterized by:

[0010] The invention of claim 5 is the sealing material of claim 1, The fire-resistant resin composition is adhered to the edge portion of the one surface of the substrate. It is characterized by:

[0011] The invention of claim 6 is the sealing material (C) of any one of claims 1 to 5, The pile yarn is made of a flame-retardant material. It is characterized by:

[0012] The invention of claim 7 is the sealing material of claim 6, The fluff body is a strip-shaped film member that is erected on the substrate so that its longitudinal direction extends along the longitudinal direction of the substrate and its short side direction is the erection direction from the substrate. It is characterized by: [Effects of the Invention]

[0013] According to the invention as set forth in claim 1, it is possible to close the gap with the contacted body and to exhibit the function of blocking flames and smoke.

[0014] According to the second aspect of the present invention, the fire-resistant resin composition can be easily integrated with the substrate.

[0015] According to the third aspect of the invention, the expansion of the fire-resistant resin composition can be promoted.

[0016] According to the fourth aspect of the present invention, the expansion amount of the fire-resistant resin composition can be increased.

[0017] According to the fifth aspect of the invention, the expansion efficiency of the fire-resistant resin composition can be increased.

[0018] According to the invention as set forth in claim 6, it is possible to impart fire resistance to the pile yarns.

[0019] According to the seventh aspect of the present invention, the sealing function of the sealing material, such as watertightness and airtightness, can be further improved. [Brief explanation of the drawings]

[0020] [Figure 1]FIG. 2(a) is a partial cross-sectional schematic view illustrating the installation of a sealant in a shutter device, and FIG. 2(b) is a partial cross-sectional schematic view illustrating the installation of a sealant in a sash window. [Figure 2] FIG. 2 is a cross-sectional view showing a configuration of a sealing material. [Figure 3] FIG. 10 is a cross-sectional view showing the configuration of a fluff body according to a modified example. [Figure 4] FIG. 1(a) is a diagram showing one embodiment of a fire-resistant resin composition, and is a cross-sectional view schematically showing a cross section cut in the thickness direction thereof, and FIG. 1(b) is a cross-sectional view schematically showing a state in which the composition has been thermally expanded due to a temperature rise caused by a flame. [Figure 5] 10A and 10B are cross-sectional views illustrating the function of a sealing material in the shutter device. [Figure 6] FIG. 10 is a cross-sectional view illustrating the function of a sealing material in a sash window. [Figure 7] FIG. 1(a) is a cross-sectional view showing a structure of a sealing material according to Modification 1, and FIG. 1(b) is a cross-sectional view showing a state in which the sealing material has been thermally expanded due to a temperature rise caused by a flame. [Figure 8] 10(a) is a cross-sectional view showing the structure of a sealing material according to Modification 2, and FIG. 10(b) is a cross-sectional view showing the state of thermal expansion due to a temperature rise caused by a flame. [Figure 9] 10(a) is a cross-sectional view showing a schematic configuration of a sealing material according to Modification 3, and FIG. 10(b) is a cross-sectional view showing a schematic state of thermal expansion due to a temperature rise caused by a flame. DETAILED DESCRIPTION OF THE INVENTION

[0021] Next, the present invention will be described in more detail below with reference to the drawings, showing embodiments and specific examples, but the present invention is not limited to these embodiments and specific examples. Furthermore, in the following explanation using the drawings, it should be noted that the drawings are schematic and the ratios of the dimensions, etc. may differ from those of the actual product, and in order to facilitate understanding, illustrations of components other than those necessary for the explanation have been omitted as appropriate.

[0022] (1) Sealing material installation structure FIG. 1(a) is a schematic partial cross-sectional view illustrating the installation of a sealant 1 in a shutter device, and FIG. 1(b) is a schematic partial cross-sectional view illustrating the installation of a sealant 1 in a sash window. The installation structure of the sealing material 1 will be described below with reference to the drawings.

[0023] 1(a), the shutter device is configured to include a support frame 100, a shutter 200 as an example of a contacted body, and a pair of seal materials 1. A similar support frame 100 and a similar pair of seal materials 1 are provided along opposite edges of the shutter 200. The support frame 100 is made of metal and formed into a rectangular cylindrical shape, and guide grooves 110 extending along the longitudinal direction of the support frame 100 are formed on the mutually opposing inner surfaces 100a of the support frame 100. The left and right side portions 200c of the shutter 200 are inserted into the guide grooves 110 of the support frame 100. When performing an opening / closing operation to set the shutter device to an open state or a closed state, the shutter 200 is supported by the guide grooves 110 of the support frame 100 so as to reciprocate up and down while movement in the left and right and front and rear directions is restricted.

[0024] On front and rear inner surfaces (opposing surfaces) 110a, 110b of the guide groove 110 that face the front surface 200a and rear surface 200b of the shutter 200 in the front-rear direction, accommodation grooves 120 that open toward the front surface 200a and rear surface 200b of the shutter 200 are formed, respectively, so as to extend along the longitudinal direction of the support frame 100. Furthermore, when both side portions 200c of the shutter 200 are inserted into the guide groove 110, gaps G are formed between the inner surfaces 110a, 110b of the guide groove 110 and the front surface 200a and rear surface 200b of the shutter 200. Then, seal materials 1 are placed, housed in the accommodation grooves 120, between the front surface 200a and rear surface 200b of both side portions 200c of the shutter 200 and the inner surfaces 120a, 120b of the guide groove 110 in the support frame 100 so as to close these gaps G.

[0025] As shown in FIG. 1(b), the sash window is configured to include a support frame 100, a window frame 300 as an example of a non-contact body, and a pair of sealing materials 1. A guide groove 110 extending along the longitudinal direction of the support frame 100 is formed on each of the opposing inner surfaces 100a of the support frame 100. When the sash window is closed, the side portion 300c of the window frame 300 is inserted into the guide groove 110 of the support frame 100.

[0026] On front and rear inner surfaces (opposing surfaces) 110a, 110b of the guide groove 110 that face the inner surface 300a and outer surface 300b of the window frame 300 in the front-to-rear direction, accommodation grooves 120 that open toward the inner surface 300a and outer surface 300b of the window frame 300 are formed so as to extend along the longitudinal direction of the support frame 100. Furthermore, when the side portion 300c of the window frame is inserted into the guide groove 110, gaps G are formed between the inner surfaces 110a, 110b of the guide groove 110 and the inner surface 300a and outer surface 300b of the window frame 300. Then, to close these gaps G, sealing material 1 is placed in the accommodation grooves 120 between the inner surface 300a and outer surface 300b of the side portion 300c of the window frame 300 and the inner surfaces 110a, 110b of the guide groove 110 of the support frame 100.

[0027] (2) Composition of sealing material FIG. 2 is a cross-sectional view showing the structure of the sealing material 1. As shown in FIG. 2, the sealing material 1 includes a fluff body 10 made of a plurality of pile yarns 12 standing on one surface 11a of the substrate 11 and extending in the longitudinal direction of the substrate 11, and a fire-resistant resin composition 20 made of a resin containing thermally expandable graphite that begins to expand with an increase in temperature, which is integrally provided on the substrate 11. The sealing material 1 is inserted into the accommodation groove 120, and is fixed in the guide groove 110 of the support frame 100. (2.1) Fluff The substrate 11 is formed from a woven fabric obtained by weaving warp yarns (not shown) and weft yarns (not shown). Pile yarns 12 are woven into the substrate 11 using a pile weave to form the fluff 10. The pile yarns 12 are erected on the substrate 11 with their base ends fastened to the warp yarns and weft yarns, and are raised on the substrate 11 by the spacing between the fibers at their upper ends increasing. A coating layer 13 is provided on the back surface 11b of the substrate 11.

[0028] The warp and weft yarns that form the base material 11, as well as the pile yarns 12, are made of yarns such as filament yarns and spun yarns that are highly durable, waterproof, highly abrasion-resistant, and have a low coefficient of dynamic friction. In particular, in this embodiment, it is preferable to use fibers that are resilient and non-water-absorbent for the pile yarns 12, and it is more preferable that the base material 11 and the pile yarns 12 are made of a flame-retardant material. A flame-retardant material is one that will not burn for five minutes after heating begins when exposed to the heat of a normal fire (Article 1, Item 6 of the Enforcement Order of the Building Standards Act).

[0029] Examples of such fibers include synthetic fibers made of olefin resins such as ultra-high molecular weight polyethylene and polypropylene, amide resins such as polyamide and aromatic polyamide, acrylic resins such as polyacrylic, ester resins such as polyethylene terephthalate, and fluororesins. Among these, modacrylic fibers made by copolymerizing acrylonitrile and vinyl chloride are particularly preferred for the warp and weft yarns that form the base material 11, as they have excellent flame retardancy. Furthermore, synthetic fibers made of flame-retardant-treated polyvinyl alcohol fibers are the most preferred fibers for use in the pile yarns 12, as they have high fiber strength and excellent weather resistance and chemical resistance.

[0030] The fineness of the pile yarns 12 is 20 to 100 denier. If the fineness is thinner than 20 denier, the rigidity of the pile yarns 12 will be reduced, causing the pile yarns 12 to bend at their bases, middle parts, etc., and the abrasion resistance will be reduced, which may prevent the sealing material 1 from fully exhibiting its sealing and cushioning functions. If the fineness exceeds 100 denier, the flexibility of the pile yarns 12 will be reduced and the pile yarns 12 will be difficult to bend, which will prevent the resistance reduction function from being fully exhibited and may cause problems with the movement of the shutter 200 and window frame 300 as non-contact bodies. In this embodiment, the pile yarns 12 are made of polyvinyl alcohol fiber and are formed to have a fineness of 75 denier.

[0031] The density of the pile yarns 12 on the base material 11 is preferably 2000 to 80000 yarns / in 2 The density is 2000 fibers / in 2 If the density is less than 80,000 threads / in, gaps are likely to form between the pile threads 12, which may prevent the sealing function from being fully exerted. Also, if the contacted object is a shutter 200, the pile threads 12 as a whole may not be able to absorb the shaking, rattle, etc. of the shutter 200, which may prevent the cushioning function from being fully exerted. 2 If the density of the pile yarns 12 exceeds 12000 / in, the contact area of the shutter 200 or the window frame 300 with the pile yarns 12 becomes large, and the sliding resistance increases, so the resistance reduction function cannot be fully exerted, and there is a risk of problems occurring when opening and closing the shutter 200 or the window frame 300. In this embodiment, the density of the pile yarns 12 is 12000 / in 2 It is said that...

[0032] The coating layer 13 provided on the back surface 11b of the base material 11 is formed from a coating agent made of a synthetic resin emulsion such as styrene-butadiene copolymer rubber (SBR), ethylene-vinyl acetate copolymer (EVA), polymethyl methacrylate (PMMA), etc. The coating layer 13 prevents fraying of the base material 11 and bonds the base ends of the pile yarns 12 to the base material 11 by impregnating the coating agent between the warp and weft yarns that form the base material 11 and hardening.

[0033] "Modified fluff body" FIG. 3 is a cross-sectional schematic diagram showing the configuration of a fluff body 10A according to a modified example. As shown in FIG. 3(a), the fluff body 10A comprises a substrate 11, a number of pile yarns 12 standing on the substrate 11 so as to extend in the longitudinal direction of the substrate 11, and a strip-shaped film member 14 standing among the pile yarns 12 on the substrate 11. Examples of the film member 14 include a flexible polypropylene film or nonwoven fabric that can block the flow of air and water. The strip-shaped film member 14 standing between the pile yarns 12 of the fluff body 10A further improves the sealing function of the sealing material, such as watertightness and airtightness.

[0034] The film member 14 is disposed in the center of the fluff body 10A in the short (width) direction, and extends along the longitudinal direction of the fluff body 10. The height of the film member 14 from the base material 11 is set to be lower than the height of the pile yarns 12 from the base material 11. In this embodiment, the height of the film member 14 is set to be approximately 90% of the height of the pile yarns 12. The base end of the film member 14 is attached to the substrate 11 by, for example, ultrasonic welding, and is provided upright.

[0035] As shown in Fig. 3(b), the film member 14 may be provided on the base material 11 so as to sandwich and support the pile yarns 12 from both sides in the short (width) direction. In this way, the sealing function of the sealing material can be improved while making the pile yarns 12 less likely to collapse.

[0036] (2.2) Fire-resistant resin composition Figure 4(a) is a diagram showing one embodiment of the fire-resistant resin composition 20, and is a cross-sectional view schematically showing a cut surface cut in the thickness direction, and (b) is a cross-sectional view schematically showing the state after thermal expansion due to the temperature rise caused by the flame. The device comprises a fire-resistant resin composition 20, a base sheet 21 made of a flame-retardant material, and a thermal expansion layer 22 containing thermally expandable graphite.

[0037] The base sheet 21 is a sheet-like member that serves as a support for the thermal expansion layer 22, and is made of a flame-retardant material. Flame-retardant materials include those that are flame-retardant in themselves and those that are not flame-retardant in themselves but are made flame-retardant by adding a flame retardant.

[0038] Examples of materials that are flame retardant themselves include flame retardant acrylic resins, polyvinyl polypyrrolidone, polyvinyl chloride, polyvinylidene chloride, etc. Resins containing halogen, such as polyvinyl chloride and polyvinylidene chloride, are preferred because they have self-extinguishing properties.

[0039] Examples of materials that have been given flame retardancy through the addition of a flame retardant include flame-retardant polyester, flame-retardant polynosic (cellulose-based regenerated fiber), etc. Examples of flame retardants added to these materials include halogen-based flame retardants such as tetrabromobisphenol A (TBBA), bis(tetrabromophthalimide)ethane, and hexabromobenzene (HBB); and phosphorus-based flame retardants such as trixylenyl phosphate, polyphosphates, aromatic condensed phosphate esters, and non-halogen condensed phosphate esters.

[0040] The form of the base sheet 21 is not particularly limited, and for example, a flame-retardant material formed into a sheet or film can be used as the base sheet 21. In this embodiment, it is preferable to use a woven fabric or nonwoven fabric made of flame-retardant fibers. The base sheet 21 and the thermal expansion layer 22 can be easily integrated into a porous woven fabric or nonwoven fabric by coating or impregnating the fabric with a mixture of thermally expandable graphite and liquid resin, and the bond can be made strong.

[0041] Examples of flame-retardant fibers include fibers made of flame-retardant materials, as well as non-combustible fibers such as metal fibers, glass fibers, and carbon fibers. In this embodiment, woven or non-woven fabrics of these fibers are preferably used as the substrate sheet. Examples of woven or non-woven fabrics include glass fiber woven fabric, glass fiber non-woven fabric, carbon fiber woven fabric, and carbon fiber non-woven fabric. The glass fiber nonwoven fabric has a basis weight of 20 to 60 g / m 2 A glass fiber nonwoven fabric having a thickness of 120 to 340 μm measured in accordance with JIS P8113 can be used.

[0042] The thermal expansion layer 22 is a layer containing thermally expandable graphite, which is a component that thermally expands in response to a temperature rise caused by a fire. "Thermal-expandable graphite" is graphite (graphite) with a structure consisting of many layered crystals, in which a substance that burns or gasifies when heated is inserted between the layers of the layered crystals. When the temperature of thermal-expandable graphite rises due to a fire, the substance burns, etc., generating gas, which expands the spaces between the layered crystals. Therefore, the substance as a whole expands, increasing its apparent volume.

[0043] Thermally expandable graphite must expand in response to the temperature rise caused by a fire. Fire temperatures can reach a maximum of 1100 to 1200°C. However, from the perspective of preventing the spread of fire, it is preferable for thermal expansion to begin at a lower temperature. Specifically, the thermal expansion starting temperature of the thermally expandable graphite is preferably 150 to 500°C, and more preferably 150 to 250°C. By using thermally expandable graphite with a thermal expansion starting temperature of 100°C or higher, the graphite does not expand with slight heating, making it easy to form a thermal expansion layer. By using thermally expandable graphite with a thermal expansion starting temperature of 500°C or lower, the graphite expands quickly after the outbreak of a fire, ensuring a reliable fire spread prevention effect.

[0044] The degree of expansion of the thermally expandable graphite is not particularly limited, but it is preferable to use thermally expandable graphite whose degree of expansion at 1000°C is 100 to 300 cc / g, and more preferably 150 to 250 cc / g. By using thermally expandable graphite with an expansion rate of 100 cc / g or more at 1000°C, it is possible to improve the effect of filling the gap G formed between the guide groove 110 and the shutter 200 / window frame 300 in the event of a fire, thereby achieving a high fire spread prevention effect. By using thermally expandable graphite with an expansion rate of 300 cc / g or less at 1000°C, the graphite does not become too brittle even after expansion, and a minimum level of strength can be maintained.

[0045] The thermal expansion layer 22 is not particularly limited in composition as long as it contains thermally expandable graphite, but is preferably formed from a mixture of thermally expandable graphite and resin. Thermally expandable graphite is a brittle, flaky material, and therefore it is difficult to form a uniform, highly durable thermal expansion layer 22 using thermally expandable graphite alone. However, by mixing thermally expandable graphite into resin, a uniform, highly durable thermal expansion layer 22 can be formed. Examples of such resins include urethane resins, polyester resins, silicone resins, and epoxy resins.

[0046] In the sealing material 1 according to this embodiment, the fire-resistant resin composition 20 is bonded to the back surface 11b of the base material 11 of the thus-configured fluff body 10 via the base material sheet 21. This allows the fire-resistant resin composition 20 to be easily integrated with the base material 11 on which the pile yarns 12 are erected.

[0047] (3) Action and effect of sealing materials FIG. 5 is a schematic cross-sectional view illustrating the function of the sealing material 1 in the shutter device. When the shutter 200 is opened or closed, as shown in Fig. 5(a), the front surface 200a and rear surface 200b of the shutter 200 slide against the pile yarns 12 of the sealing material 1. At this time, the pile yarns 12 are curved, thereby exhibiting a resistance-reducing function and reducing sliding resistance. Furthermore, since the tips of the pile yarns 12 are always in contact with the front surface 200a and rear surface 200b of the shutter 200, the gap G formed between the guide groove 110 and the shutter 200 is blocked by the pile yarns 12. As a result, the pile yarns 12 prevent the flow of air, rainwater, etc. through the gap G, thereby exhibiting a good sealing function.

[0048] On the other hand, if a fire breaks out while the shutter 200 is closed, as shown in Figure 5(b), the thermal expansion layer 22 thermally expands as the temperature rises due to the fire, pushing up the fluff 10, and the thermal expansion layer 22 itself also bulges outward from the accommodation groove 120, sealing the gap G formed between the guide groove 110 and the shutter 200. Because the fluff 10 is made of a flame-retardant material and has a certain degree of flame retardancy, the fluff 10 will not disappear until the temperature rise due to the fire lasts for about 5 minutes, but if that period is exceeded, the function of sealing the gap G by the fluff 10 may be reduced. The sealing material 1 of this embodiment maintains its thermal expansion even if the temperature rise due to the fire lasts for more than 5 minutes, sealing the gap G and providing a flame and smoke blocking function.

[0049] FIG. 6 is a cross-sectional view illustrating the function of the sealing material 1 in a sash window. When the sash window is closed, as shown in Figure 6(a), the ends of the pile yarns 12 of the sealing material 1 are constantly in contact with the inner surface 300a and outer surface 300b of the window frame 300, so that the gap G formed between the guide groove 110 and the window frame 300 is blocked by the pile yarns 12. This prevents the flow of air, rainwater, etc. through the gap G, and the sealing function is effectively exhibited.

[0050] Furthermore, if a fire occurs while the sash window is closed, as shown in Figure 6(b), the thermal expansion layer 22 thermally expands as the temperature rises due to the fire, pushing up the fluff 10, and the thermal expansion layer 22 itself also bulges outward from the accommodation groove 120, sealing the gap G formed between the guide groove 110 and the window frame 300. Because the fluff 10 is made of a flame-retardant material and has a certain degree of flame retardancy, the fluff 10 will not disappear until the temperature rise due to the fire lasts for about 5 minutes, but if that period is exceeded, the fluff 10's ability to seal the gap G may be reduced. The sealing material 1 of this embodiment maintains its thermal expansion even if the temperature rise due to the fire lasts for more than 5 minutes, sealing the gap G and providing a flame and smoke blocking function.

[0051] "Variation 1" FIG. 7(a) is a cross-sectional view showing the structure of a sealing material 1A according to Modification 1, and (b) is a cross-sectional view showing the state in which the sealing material 1A has been thermally expanded due to a temperature rise caused by a flame. As shown in Fig. 7(a), the sealing material 1A includes a fluff body 10 made of a plurality of pile yarns 12 standing on one surface 11a of a substrate 11 and extending in the longitudinal direction of the substrate 11, and a fire-resistant resin composition 20A bonded to the back surface 11b of the substrate 11 so as to surround the substrate 11 and made of a resin containing thermally expandable graphite that begins to expand with an increase in temperature. Specifically, the fire-resistant resin composition 20A includes a thermal expansion layer 22A surrounding the back surface 11b of the substrate 11 and a thermal expansion layer 22B surrounding both side portions of the substrate 11. The sealing material 1A is inserted into the accommodation groove 120 and fixed in the guide groove 110 of the support frame 100.

[0052] In the sealing material 1A according to the first modification, when a fire breaks out while the pile yarns 12 are in contact with a contacted body (hereinafter, the shutter 200, the window frame 300, etc. will be referred to as the contacted body) and blocking the gap G, as shown in Fig. 7(b), the thermal expansion layer 22A thermally expands with the temperature rise caused by the fire, pushing up the fluff body 10, and the thermal expansion layer 22B thermally expands and bulges outward from the accommodation groove 120 (as indicated by the arrow in the figure), blocking the gap G formed between the guide groove 110 and the non-contacted body. In this way, the sealing material 1A according to the first modification can promote the expansion of the fire-resistant resin composition 20A in the event of a fire, thereby exhibiting a function of blocking flames and smoke.

[0053] "Variation 2" FIG. 8(a) is a cross-sectional view showing the structure of a sealing material 1B according to Modification 2, and (b) is a cross-sectional view showing the state in which the sealing material 1B has been thermally expanded due to a temperature rise caused by a flame. As shown in FIG. 8(a), the sealing material 1B includes a fluff body 10 consisting of a plurality of pile yarns 12 extending upright on one surface 11a of the substrate 11 in the longitudinal direction of the substrate 11, and a fire-resistant resin composition 20B formed into a shape that completely surrounds the substrate 11 and made of a resin containing thermally expandable graphite that begins to expand upon temperature rise. Specifically, the fire-resistant resin composition 20B includes a thermally expandable layer 22A covering the back surface 11b of the substrate 11, a thermally expandable layer 22B covering both sides of the substrate 11, and a thermally expandable layer 22C covering the one surface 11a of the substrate 11. Such a fire-resistant resin composition 20B can be formed, for example, by extrusion molding a mixture of thermally expandable graphite and resin heated at a temperature lower than the thermal expansion starting temperature of the thermally expandable graphite. The sealing material 1B is inserted into the receiving groove 120 and fixed in the guide groove 110 of the support frame 100.

[0054] In the sealing material 1B according to Modification 2, when a fire breaks out while the pile yarns 12 are in contact with the contacted body and blocking the gap G, as shown in Fig. 8(b), the thermal expansion layer 22A thermally expands as the temperature rises due to the fire, pushing up the fluff body 10, and the thermal expansion layers 22B and 22C thermally expand and bulge significantly outward from the accommodation groove 120 (as indicated by the arrows in the figure), blocking the gap G formed between the guide groove 110 and the non-contacted body. In this way, in the event of a fire, the sealing material 1B according to Modification 2 can increase the expansion amount of the fire-resistant resin composition 20B, thereby exhibiting a flame and smoke blocking function.

[0055] "Variation 3" FIG. 9(a) is a cross-sectional view showing the structure of a sealing material 1C according to Modification 3, and (b) is a cross-sectional view showing the state in which the sealing material 1C has been thermally expanded due to a temperature rise caused by a flame. 9(a), the sealing material 1C includes a fluff body 10 made of a plurality of pile yarns 12 standing on one surface 11a of the substrate 11 and extending in the longitudinal direction of the substrate 11, and a fire-resistant resin composition 20C made of a resin containing thermally expandable graphite that begins to expand with an increase in temperature and that is adhered to the ear portions of the one surface 11a of the substrate 11. The sealing material 1C is inserted into the accommodation groove 120 and fixed in the guide groove 110 of the support frame 100.

[0056] In the sealing material 1C according to Modification 3, when a fire breaks out while the pile yarns 12 are in contact with the contacted body and blocking the gap G, as shown in Fig. 9(b), the thermal expansion layer 22C constituting the fire-resistant resin composition 20C thermally expands as the temperature rises due to the fire, bulging outward from the accommodation groove 120 (as indicated by the arrow in the figure) and blocking the gap G formed between the guide groove 110 and the non-contacted body. In this way, in the event of a fire, the sealing material 1C according to Modification 3 can increase the expansion efficiency of the fire-resistant resin composition 20C and exhibit a function of blocking flames and smoke.

[0057] In this embodiment, a sealing material has been described that is installed in a shutter device or sash window to seal the gap with the contacted object and also functions to block flames and smoke. However, it can also be used in areas where components that make up a house have low heat resistance or fire resistance and are melted or burned, forming gaps between the components, thereby blocking flames and smoke. [Explanation of symbols]

[0058] 1, 1A, 1B, 1C...Sealing material 10, 10A... fluff body, 11... substrate, 12... pile yarn, 13... coating layer 20, 20A, 20B, 20C... Fire-resistant resin composition, 21... Base material sheet, 22, 22A, 22B, 22C... Thermal expansion layer 100···Support frame, 110···Guide groove, 120···Accommodation groove 200···Shutter 300···Window frame G...Gap

Claims

1. A sealing material that comes into contact with a contacted body to close a gap and improve airtightness, A substrate; a pile body made of a plurality of pile yarns standing on one surface of the base material and extending in the longitudinal direction of the base material; and a fire-resistant resin composition comprising a resin containing thermally expandable graphite that is integrally provided on the substrate and begins to expand with a rise in temperature. A sealing material characterized by:

2. The fire-resistant resin composition is adhered to the back surface of the substrate so as to cover the back surface opposite to the one surface of the substrate. The sealing material according to claim 1 .

3. The fire-resistant resin composition is adhered to the back surface of the substrate so as to surround the substrate from the back surface side opposite to the one surface of the substrate. The sealing material according to claim 1 .

4. The fire-resistant resin composition is molded into a shape that surrounds the entire substrate. The sealing material according to claim 1 .

5. The fire-resistant resin composition is adhered to the edge portion of the one surface of the substrate. The sealing material according to claim 1 .

6. The pile yarn is made of a flame-retardant material. The sealing material according to any one of claims 1 to 5.

7. The fluff body is a strip-shaped film member that is erected on the substrate so that its longitudinal direction extends along the longitudinal direction of the substrate and its short side direction is the erection direction from the substrate. The sealing material according to claim 6 .

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