JP2015200137A - Non-flammable, heat-insulating, elastic and expandable protective material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-flammable, heat-insulating, elastic and expandable protective material to be inserted into a surface layer of an expansion device as a protective layer, which does not spread flames or catch fire due to high temperature even when the surface layer is exposed to flames or a high temperature, while shielding the high temperature on the surface layer for protecting functional materials of gaps such as water-sealing, acoustic and other materials inserted into gaps of the expansion device, capable of forming a highly expandable protective layer.SOLUTION: A non-flammable, heat-insulating, elastic and expandable protective material F has a non-flammable, heat-insulating expandable layer A formed by laminating a film forming sheet 3 that contains an incombustible agent, having an elastic non-flammable film 2 that contains an incombustible agent formed on a surface layer of a base material sheet 1 made of a flexible, elastic rubber sponge material containing a series of air bubbles.

Description

  The present invention inserts and lays in the surface layer of functional materials such as stretchable waterproofing materials and stretchable soundproofing materials that are laid in the stretchable space, and fires due to the action of high temperature flames such as road fires and flame cylinders and the action of high heat Further, the present invention relates to a non-combustible heat-insulating elastic expansion / contraction protective material that protects an idle functional material from thermal damage and that does not ignite and spread by itself.

  The bridge girder of road bridges and viaducts expands and contracts depending on the laying environment temperature, but the expansion and contraction device that absorbs this expansion and contraction and has expansion and contraction spaces to absorb the vibration displacement of road bridges and viaducts is the bridge length. Are arranged at regular intervals.

  By the way, from road bridges and viaduct expansion / contraction gaps, road surface earth and sand, rainwater, etc. fall, and road surface vehicle running noise leaks under the road. A play function material such as a stretchable soundproof material is laid in the play room.

  These stretchable functional materials are all made of an organic polymer material such as a flexible elastic foam material that is elastic and stretchable, so vehicles such as fires on the surface of the expansion device and road repair work When a high-heat flame as high as 1,300 ° C, such as a flame tube used at the time of travel regulation, acts, it spreads easily, sometimes the expansion device play becomes a flue, and the expansion device extends over the entire bridge width in an instant. The fire may spread and reach the vehicle lane, causing a traveling vehicle accident.

Further, when repairing the expansion / contraction device, a welding operation or a fusing operation may be performed, and even during the welding or fusing, a high-temperature molten metal or the like is scattered and acts on the surface of the loose functional material.
These high-temperature melting and melting heats contact the surface layer of the loose functional material and damage the loose functional material by ignition combustion or high heat.

  In order to deal with these problems, conventionally, as shown in FIG. 1, a sheet of about 30 to 50 mm thick made of a flame-retardant elastic sponge material is inserted into the surface layer as a protective layer A between the play of the expansion device J. Although a method of delaying the combustion and protecting the loose functional material B has been proposed, if a high-temperature flame or high heat is applied for a long time, the fire spreads and the high heat is transmitted to damage the loose functional material B. It becomes.

  As another method, a method is proposed in which a protective layer (a) having a large thickness formed of a stretchable elastic flame retardant sponge material is inserted and arranged in the surface layer to delay the ignition spread time and shield the high heat of the surface layer by the thickness. However, the height of the expansion device idle wave plate P constituting the clearance of the expansion device J is limited by the structure of the expansion device J. Insufficient space for insertion.

  In view of the problems of the protective layer provided on the surface layer of the conventional expansion device, the present invention is inserted into the surface layer of the expansion device as a protective layer, and even if a high-heat combustion flame or high heat acts on the surface layer itself Thin, thin, and highly stretchable protection that protects functional materials such as water-stopping materials and soundproofing materials inserted between expansion devices without blocking high-temperature fires or high-temperature ignition, and by blocking the high temperature of the surface layer An object of the present invention is to provide an incombustible heat-insulating elastic stretch protective material capable of forming a layer.

  In order to achieve the above object, the non-combustible heat-insulating elastic stretch protective material of the present invention is a non-combustible heat-insulating elastic stretch protective material provided as a protective layer on the surface layer of the stretch device, and is a base made of a flexible elastic rubber open-cell sponge material. It is characterized by comprising a non-combustible heat-insulating stretchable layer formed by laminating a non-combustible agent-containing film forming sheet in which an elastic flame retardant film containing a non-combustible agent is formed on the surface layer of the material sheet.

  Moreover, the compound which melt | dissolves with the low combustion heat and produces | generates the carbon dioxide which is a nonflammable gas can be used for the said incombustible agent.

  Further, frit soot made of an inorganic compound that melts with low combustion heat can be added to the incombustible agent.

  In addition, the non-combustible heat-insulating elastic layer has a non-combustible heat-insulating elastic layer formed by laminating a non-combustible agent-containing film-forming sheet on which an elastic flame retardant film containing a flame retardant containing frit soot is added. An incombustible heat-insulating stretchable layer formed by laminating an incombustible agent-containing film-forming sheet formed with an elastic incombustible agent film containing an incombustible agent without adding frit soot can be used in the central portion.

  Moreover, the said incombustible heat-insulating elastic layer can be laminated | stacked by making the said incombustible agent containing film formation sheet into a horizontal direction or a perpendicular direction.

  Moreover, the heat ray reflective layer which formed the reflective mirror surface which reflects a heat ray can be adhere | attached and integrated on the lowermost surface of the said nonflammable heat insulation elastic layer.

  By using the non-combustible heat-insulating elastic expansion / contraction protective material of the present invention, it is inserted as a protective layer into the surface layer of the expansion / contraction device. In addition, it is possible to form a protective layer having a thin and large stretch property that blocks the high temperature of the surface layer and protects the play function material such as a water stop material and a soundproof material inserted between the play of the stretch device.

It is laying figure of the functional material provided in the play of an expansion-contraction apparatus, and its protection material. It is a schematic block diagram of the incombustible heat insulation elastic expansion-contraction protective material of this invention. It is a block diagram of the nonflammable agent containing film formation sheet which comprises the nonflammable heat insulation elastic | stretch layer of a nonflammable heat insulation elastic expansion / contraction protective material. It is a lamination view of the same incombustible agent content film formation sheet, (a) is an explanatory view showing the state where it was horizontally laminated, and (b) is an explanatory view showing the state where it was vertically laminated. It is a schematic block diagram of a heat ray reflective layer. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic configuration diagram of a composite non-combustible heat insulating stretch layer in the non-combustible heat insulating elastic stretch protective material of the present invention, wherein (a) is a schematic configuration diagram of a composite non-flammable heat insulating stretch layer formed by horizontal lamination, and (b) is a vertical laminate. It is a schematic block diagram of the composite incombustible heat insulation elastic layer formed by doing. It is a model figure of one Example of the nonflammable heat insulation elastic expansion-contraction protective material of this invention. It is explanatory drawing of the combustion test of one Example of the nonflammable heat insulation elastic expansion-contraction protective material of this invention. It is explanatory drawing of the flame retardance test according to JISK6400-6.

  Hereinafter, even if a high-heat combustion flame or high heat acts, a protective layer having a thin and large stretchability that is capable of shutting off high-temperature surface heat and does not ignite itself or ignite itself. Embodiments of the non-combustible heat-insulating elastic elastic protective material of the present invention will be described with reference to the drawings.

  As shown in FIG. 2, the main structural structure of the non-combustible heat-insulating elastic stretch protective material F of the present invention is composed of a non-combustible heat-insulating stretch layer A occupying the main constituent, and if necessary, a heat ray reflective layer B on the lowermost surface. Is constructed.

  The incombustible heat-insulating stretch layer A having stretchability is a base sheet 1 obtained by dividing and slicing a heat-resistant, aging-resistant flexible stretchable elastic rubber open-cell sponge material to a constant thickness t, As shown in FIG. 3, the surface of the base sheet 1 is coated with an elastic flame retardant film 2 containing a high concentration of an inorganic compound flame retardant using a heat-resistant and aging-resistant polyelastomer as a matrix. The forming sheet 3 is formed, and a plurality of the incombustible agent-containing film forming sheets 3 are laminated and integrated until a predetermined thickness T is obtained as shown in FIG.

  Further, on the lowermost surface of the incombustible heat-insulating elastic layer A, a heat ray is applied to the surface layer of the base sheet 1 obtained by slicing the heat-resistant and aging-resistant flexible elastic rubber open-cell sponge material into a predetermined thickness t as shown in FIG. As shown in FIG. 2, the heat ray reflective layer B on which the reflecting mirror surface 4 that reflects infrared rays is bonded and integrated is used as a non-combustible heat insulating elastic stretch protective material F.

  In this incombustible heat-insulating elastic stretch protective material F, the elastic incombustible agent coated on the surface layer of the incombustible agent-containing film-forming sheet 3 shown in FIG. The inorganic compound flame retardant component contained in the coating 2 is a metal hydroxide compound that melts with low combustion heat and thermally decomposes to produce water, and an inorganic hydroxide crystal body in which water of crystallization is bonded to them, Further, it is a basic carbonic acid compound in which a metal carbonic acid compound or a carbonic acid compound which is melted with low combustion heat and is thermally decomposed to generate carbon dioxide gas which is an incombustible gas, a hydroxide compound thereof, and crystal water are crystal-bonded. These flame retardants are added to the elastic flame retardant coating 2 alone or as a mixture thereof.

  Further, in the elastic flame retardant film 2 coated on the surface layer of the flame retardant containing film-forming sheet 3 shown in FIG. 3 and constituting the non-flammable heat insulating stretchable layer A, the elasticity constituting the elastic flame retardant film 2 is shown. The heat-resistant and aging-resistant polyelastomer of the matrix can be used as an organic silicon compound in combination with an inorganic compound flame retardant component.

  Further, as a constituent material of the elastic flame retardant coating 2 shown in FIG. 3, a mixed fusion frit of a low-melting-point inorganic compound that easily melts at a low temperature with respect to the inorganic compound flame retardant contained in the elastic flame retardant coating 2 Soot can be added and used together.

  In forming the incombustible heat-insulating stretch layer A, the stacking direction of the incombustible agent-containing film forming sheet 3 constituting the incombustible heat-insulating stretch layer A is the incombustible agent-containing film forming sheet 3 shown in FIG. It is not limited to the horizontal lamination | stacking laminated | stacked in a horizontal direction, It can also be set as the vertical lamination | stacking which laminates | stacks the flame retardant containing film forming sheet 3 shown in FIG.4 (b) in a perpendicular direction.

  Further, in the elastic flame retardant film 2 formed on the surface layer of the flame retardant containing film-forming sheet 3 shown in FIG. 3, the elastic flame retardant film 2a and the elastic flame retardant having different components of the flame retardant contained. The coating 2b, each coated on the surface of the base sheet 1, to form a flame retardant containing film formation sheet 3a and a flame retardant containing film formation 3b, further laminated a plurality of types for each type, Each of the thicknesses Ta and Tb is used to form a non-combustible and heat-insulating elastic layer Aa and a non-combustible and heat-insulating elastic layer Ab, and as shown in FIG. 6 (a) and FIG. It can be set as the heat insulation elastic layer A.

  In general, when non-combustible and flame-retardant organic polymer flexible elastic rubber, it is necessary to mix a large amount of non-combustible agent into the polymer, but this impairs flexibility and physical properties, and also prevents aging resistance. Reduce. Furthermore, it is impossible to make a flexible foamed sponge material by mixing a large amount of incombustible agent, and it is difficult to produce an incombustible heat-insulating elastic expansion / contraction protective material with a material having a target function.

On the other hand, the incombustible heat-insulating elastic stretch protective material F of the present invention makes it possible.
That is, as shown in FIG. 2, the main structural structure of the incombustible heat-insulating elastic stretch protective material F is composed of a non-combustible heat-insulating stretch layer A occupying the main constituents and a heat ray reflective layer B laid on the lowermost surface thereof. The incombustible heat-insulating elastic layer A having elasticity is a base sheet 1 obtained by dividing a heat-resistant, aging-resistant flexible elastic elastic rubber open-cell sponge material into a predetermined thickness t to obtain a base material sheet 1. As shown in FIG. 3, the surface of the base sheet 1 is made non-combustible by coating the surface of the base material sheet 1 with an elastic non-combustible agent film 2 containing a high-concentration inorganic compound flame retardant using a heat-resistant and aging-resistant polyelastomer as a matrix. The agent-containing film-forming sheet 3 is formed, and a plurality of the flame retardant-containing film-forming sheets 3 are laminated and integrated until a predetermined thickness T is reached, as shown in FIG.

  That is, the incombustible heat-insulating elastic layer A, which is the main constituent of the incombustible heat-insulating elastic stretch protective material F, is formed by dividing the main constituent material into heat-resistant and aging-resistant flexible elastic elastic rubber open-cell sponge material into a constant thickness t. The elastic flame retardant coating 2 containing a high concentration of flame retardant coated on the surface of the base sheet 1 is thin with an elastic polymer as a matrix. By forming a coating, it becomes a flexible coating, can follow the expansion / contraction displacement between the expansion and contraction devices without hindering the free expansion / contraction of the base sheet 1, and can be a nonflammable heat insulating expansion / contraction layer A having free expansion / contraction. .

  Furthermore, on the lowermost surface of the incombustible heat-insulating stretchable layer A, as shown in FIG. 5, a heat-resistant and aging-resistant flexible elastic rubber open-cell sponge material is formed on the surface layer of the base sheet 1 obtained by slicing the slice into a predetermined thickness t. A heat ray reflective layer B having a reflecting mirror surface 4 that reflects infrared rays, which are heat rays, is prepared, and this is bonded and integrated to form an incombustible and heat insulating elastic stretch protective material F as shown in FIG.

  That is, as shown in FIG. 2, a heat ray reflective layer B having a reflecting mirror surface 4 that reflects infrared rays, which are heat rays, is disposed on the lowermost surface of the nonflammable heat insulating stretchable layer A. High heat acting on the surface layer or heat transfer infrared rays of combustion heat is reflected, and the non-combustible heat insulating elastic expansion / contraction protective material F having a small thickness can prevent high heat from acting on the loose functional material.

  Moreover, in this incombustible heat insulating elastic stretch protective material F, the elastic incombustible coated on the surface layer of the incombustible agent-containing film-forming sheet 3 shown in FIG. 3 constituting the incombustible heat insulating stretch layer A which is a main component. The inorganic compound flame retardant component contained in the agent coating 2 is a metal hydroxide compound that melts with low combustion heat and thermally decomposes to generate water, and an inorganic hydroxide crystal body in which water of crystallization is bonded to them, Furthermore, it is a metal carbonate compound that melts with low combustion heat and is thermally decomposed to generate carbon dioxide, which is an incombustible gas, and a basic carbonate compound in which a carbonate compound, a hydroxide compound thereof, and crystal water are crystal-bonded. . These flame retardants are added to the elastic flame retardant coating 2 alone or as a mixture thereof.

  In other words, the chain flame spread reaction of flammable organic polymers such as rubber and plastic is exposed to high heat, such as high-heat combustion heat, so that low molecular weight flammable gas by molecular cutting decomposition The decomposition combustible gas increases the frequency of contact with oxygen at a high temperature, and generates active radicals (.OH, .O). This active radical (.OH, .O) has a high reaction energy and acts on the cracked combustible gas to generate water, and further generates an active radical (.OH, .O). It promotes the flame spread reaction and raises a high-heat combustion flame. Moreover, this high reaction heat promotes the decomposition of the polymer into low molecular weight combustible gas, and the high temperature combustion flame spread reaction is chained. This is the basic mechanism of the reaction of the combustible organic polymer on the flame spread.

  However, when the combustible organic polymer is affected by high heat combustion heat, etc., if the high heat combustion heat can be cooled and the reaction environment oxygen concentration can be lowered, the combustion temperature becomes low and the oxygen concentration is low. As a result, the heat of reaction decreases, and the decomposition of the polymer into low molecular weight combustible gas can be suppressed.

That is, the polymer oxidation reaction at a low temperature and low oxygen concentration suppresses the polymer cleavage and low molecular weight gasification reaction and becomes a hydrogen desorption decomposition reaction from the polymer, and water (H ₂ O by oxidation of the desorbed hydrogen). ) And the carbonization reaction of the polymer from which hydrogen is released. This carbon is nonflammable, and the low-temperature combustion product water cools the reaction heat and further suppresses the combustion reaction to extinguish the fire.

  In the combustible base material sheet 1 which is a main constituent material of the incombustible heat-insulating stretchable layer A of the present invention, the incombustible mechanism is a thin elastic incombustible material containing a high concentration of incombustible agent in the surface layer of the base material sheet 1. As shown in FIGS. 4 (a) and 4 (b), the flame retardant-containing film-forming sheet 3 is formed by coating with the agent film 2, and the flame-retardant-containing film-forming sheet 3 is further laminated and integrated. The non-combustible heat insulating stretchable layer A is configured.

  That is, the base material sheet 1 is surrounded by the elastic flame retardant coating 2, and when a high-heat flame or high heat acts on the surface of the non-flammable heat-insulating stretchable layer A, the elastic flame retardant coating 2 formed on the surface layer is coated. The inorganic compound flame retardant contained immediately melts at a low temperature to form an inorganic molten film, blocking oxygen and preventing high temperature combustion, and the inorganic compound flame retardant hydroxylated compound releases its crystal water and generates water vapor. Moreover, by generating water by molecular decomposition, the combustion system is cooled and the oxygen concentration of the combustion environment is diluted to suppress the combustion reaction and further reduce the combustion heat.

  On the other hand, the carbonic acid compound and the basic carbonic acid compound, which are inorganic compound flame retardants, similarly release water of crystallization to generate water, which acts as a reaction heat cooling of the combustion system and carbon dioxide gas as an inert gas by molecular decomposition. And the oxygen concentration in the combustion environment is diluted to suppress the combustion reaction and further reduce the combustion heat.

  Due to the action of these incombustible agents, even if a high hot flame flame or high heat acts on the surface layer, the incombustible heat-insulating stretch layer A becomes a low temperature, low oxygen combustion reaction, and the combustible polymer constituting the combustible polymer has a low molecular weight. Since the active radicals (.OH, .O) do not proliferate without being decomposed, the chain spread reaction is stopped and the incombustible fire extinguishes.

Furthermore, the decomposition product carbon dioxide gas lowers the heat conduction and increases the heat shielding property.
Incidentally, the metal hydroxide of the inorganic compound flame retardant component used in the present invention and its crystalline substance melt at a low temperature (about 350 ° C.) to become an inorganic molten substance, and the combined crystal water becomes water by thermal decomposition. The metal hydroxide compound decomposes into metal oxide and water. Furthermore, other metal carbonate compounds and basic carbonate compound crystal substances melt at a low temperature (about 350 ° C.) to become inorganic melt substances, and bonded crystal water becomes water by thermal decomposition. The encapsulated metal hydroxide compound is decomposed into a metal oxide and water, and the metal carbonate compound is thermally decomposed into a metal oxide and an inert carbon dioxide gas.

  Further, in the elastic flame retardant film 2 coated on the surface layer of the flame retardant containing film-forming sheet 3 shown in FIG. 3 and constituting the non-flammable heat insulating stretchable layer A, the elasticity constituting the elastic flame retardant film 2 is shown. By using the matrix polyelastomer as an organosilicon compound, the combined effect with the inorganic compound flame retardant component is demonstrated, the low-temperature melting of the inorganic flame retardant decomposition oxide is promoted, the oxygen blocking effect and the heat insulation effect Is encouraged.

  That is, this organosilicon compound matrix generates silicon (Si) by thermal decomposition, and silicon (Si) and an inorganic flame retardant decomposed oxide form a co-fusion, forming a low-temperature melting soot and forming an inorganic molten film. To block oxygen and prevent high temperature combustion.

  In addition, as a constituent material of the elastic flame retardant coating 2 shown in FIG. 3, a mixed fusion frit soot of a low melting point inorganic compound that easily melts at a low temperature together with the inorganic compound flame retardant is added and used in combination. Melting point inorganic compound fusion frit soot is melted by low-temperature combustion heat, adsorbs the metal oxide of the inorganic compound incombustible pyrolysis product, acts as a new mixed low-temperature melting and hatching, and further increases the oxygen barrier inorganic coating Thus, the oxygen barrier property is enhanced, and the dehydrogenation reaction and carbonization reaction of the organic polymer proceed due to low oxygen and low temperature combustion, and the incombustible heat insulating stretchable layer A becomes incombustible and incombustible. In particular, if the low-melting-point inorganic compound-fused frit bottle is phosphoric acid glass, the dehydrogenation reaction and carbonization reaction of the organic polymer are further performed at an early stage, and the effect is enhanced.

  In forming the non-combustible heat-insulating stretch layer A, the laminated structure of the non-flammable agent-containing film-forming sheet 3 constituting the non-flammable heat-insulating stretch layer A is not limited to the horizontal lamination shown in FIG. As shown in FIG. 4 (b), it may be constituted by vertical lamination.

  That is, the expansion / contraction displacement of the incombustible agent-containing film-forming sheet 3 forming the non-combustible heat-insulating elastic layer A is easier in the thickness direction than in the width direction of the base sheet 1 and suppresses elastic strain buckling deformation. By determining the laminating direction of the incombustible agent-containing film-forming sheet 3 according to the expansion / contraction direction between the spaces where the incombustible heat-insulating elastic expansion / contraction protective material F is laid, the expansion / contraction characteristics of the incombustible heat-insulating expansion / contraction layer A can be further improved.

  Further, in the elastic flame retardant film 2 formed on the surface layer of the flame retardant containing film forming sheet 3 shown in FIG. 3, the components of the flame retardant contained are different, and the elastic flame retardant film 2a and the elastic flame retardant are contained. These are coated on the surface of the base sheet 1 to form a flame retardant film 2b, to form a flame retardant containing film forming sheet 3a and a flame retardant containing film forming sheet 3b. The non-combustible heat-insulating stretchable layer Aa and the non-combustible heat-insulating stretchable layer Ab having thicknesses Ta and Tb, respectively, are further laminated to form a composite non-combustible as shown in FIGS. 6 (a) and 6 (b). It can be set as the heat insulation elastic layer A.

  That is, when the surface layer of the incombustible heat-insulating elastic stretch protective material F is subjected to a fire or high heat action, the heat action and the combustion environment conditions are different between the surface layer and the inner part of the non-flammable heat-insulating elastic stretch protective material F, Each part must have a non-combustible mechanism and required protective functional characteristics.

  And in the surface layer, since it is exposed to a combustion flame or high heat and is directly in contact with the atmosphere, it is easy to supply oxygen, and the rubber polymer that is the material of the base sheet 1 is fired at high temperature.

  In order to prevent this, it is necessary to immediately cool the combustion heat to lower the surface layer combustion temperature, reduce the oxygen concentration in the surface combustion environment, and shut off from oxygen, and also by early dehydrogenation reaction Carbonization of the rubber polymer is required.

  In addition, in the central part of the incombustible heat-insulating elastic stretch protective material F, a non-combustible function similar to that of the surface layer is also required, but in particular, a function of cooling the high heat transmitted from the surface layer and relaxing or shielding the conduction heat is required. Therefore, it is necessary to protect the loose functional material B laid under the incombustible heat-insulating elastic expansion / contraction protective material F from high heat.

  This incombustible heat-insulating elastic expansion / contraction protective material F can be formed into a protective layer A having a small thickness and large elasticity by forming and disposing an incombustible agent layer adapted to the required functional characteristics of each part.

Hereinafter, the non-combustible heat insulating elastic stretch protective material F of the present invention will be described more specifically.
As shown in FIG. 2, the basic structure outline of the incombustible heat-insulating elastic expansion / contraction protective material F of the present invention is a high heat conducted by reflecting the incombustible heat-insulating elastic layer A which is the main component of the structure and the heat ray infrared ray disposed on the lower surface thereof. It is formed by two members of the heat ray reflective layer B that suppresses the above.

  And the main member which comprises each part consists of the base material sheet 1 which made the base material the heat-resistant and aging-resistant flexible elastic elastic rubber open-cell sponge material, and divided and sliced it into fixed thickness t, The incombustible heat-insulating stretchable layer A of the constituent member is a nonflammable agent-containing film-forming sheet 3 in which an elastic incombustible film 2 is formed on the surface layer of the base sheet 1 as shown in FIG. In this way, they are laminated.

  The elastic flame retardant coating 2 that forms the flame retardant containing film-forming sheet 3 by coating the surface layer of the base sheet 1 has a high concentration of inorganic compound flame retardant using a heat-resistant and aging-resistant polyelastomer as a matrix. It is the elastic flame retardant film | membrane 2 contained in.

  Further, as shown in FIG. 5, the heat ray reflective layer B is formed by applying a material for forming the reflective mirror surface 4 to the surface layer of the base sheet 1.

  Hereinafter, as one example, a flame retardant containing film-forming sheet 3a formed by coating the non-flammable heat-insulating stretchable layer A as shown in FIG. 7 with elastic flame retardant films 2a and 2b containing different flame retardants, respectively. 3b is formed of a non-combustible heat-insulating stretch layer Aa and Ab composed of non-combustible heat-insulating stretch layers Aa and Ab, and a material for forming the reflecting mirror surface 4 on the surface layer of the base sheet 1 is applied to the lowermost layer. The non-combustible heat insulating elastic expansion / contraction protective material F provided with the heat ray reflective layer B formed as described above will be described.

  The incombustible heat-insulating elastic stretch protective material F shown in FIG. 7 is made of a soft open-cell rubber sponge (foamed about 5 to 10 times) such as ethylene-propylene-diene rubber (EPDM rubber) or polychloroprene (neoprene rubber). The base material.

  The non-combustible heat insulating stretch layer Aa constituting the surface portion of the composite non-flammable heat insulating stretch layer A is directly exposed to a combustion flame and high heat, and is in direct contact with the atmosphere so that oxygen can be easily supplied. It is in the environment to do.

  As an added inorganic flame retardant to prevent this, an inorganic hydroxide compound that immediately melts at low temperature with combustion heat and decomposes at low temperature to produce water is applied to measure combustion high temperature cooling. In addition, it adsorbs metal oxides generated by the decomposition of inorganic hydroxide compounds, and also uses inorganic molten frit soot that acts as a new mixed low-temperature melting soot to increase the ability to form an oxygen-blocking melt film, thereby improving the oxygen barrier effect of the surface layer. To increase.

  The combined effect of both promotes low-temperature dehydrogenation of the rubber polymer by low-temperature and low-oxygen combustion and thereby carbonization of the polymer, thereby realizing incombustibility of the incombustible heat-insulating stretchable layer Aa.

  On the other hand, the non-combustible heat-insulating elastic layer Ab constituting the center part of the composite non-combustible heat-insulating elastic layer A also needs a function of cooling and incombusting the combustion heat in the same manner as the non-combustible heat-insulating elastic layer Aa constituting the surface layer part. In addition to applying inorganic hydroxide compounds, inorganic carbonate compounds or basic carbonate compounds that generate carbon dioxide, which is an inert gas by further low-temperature decomposition, are added to block high heat transferred from the surface layer to block the carbon dioxide contained in the product. Eliminates shielding due to thermal characteristics.

  By using both of these, it is possible to form a nonflammable heat insulating stretch layer Ab having high cooling and heat insulating properties.

  Thus, as shown in FIG. 7, the incombustible heat-insulating elastic layer A, which is the main component of the incombustible heat-insulating elastic stretch protective material F, is made into the above-mentioned composite incombustible heat-insulating elastic layer, thereby reducing the thickness of the non-combustible heat insulating material. The elastic stretch layer A can be realized.

Moreover, the heat ray reflective layer B in which the reflecting mirror surface 4 provided as shown in FIG. 2 is formed on the lowermost surface of the incombustible heat-insulating stretchable layer A has a heat-resistant specular coating on the surface of the base sheet 1 (thickness: 5 mm). Applying to form a reflective surface for heat ray infrared rays, reflecting the heat ray infrared rays of high heat and combustion heat acting on the surface layer of the incombustible heat-insulating elastic layer A, and having a loose function with a thin non-combustible heat-insulating elastic elastic protective material F It can be protected without high heat acting on the material.

  The dimensions of the non-combustible heat-insulating elastic expansion / contraction protective material F shown in FIG. 7 are, for example, a thickness of 35 mm, a maximum gap insertion width W of 300 mm, and a length direction of 300 mm (or 300 mm or more).

  Moreover, the thickness Ta of the incombustible heat insulating stretch layer Aa constituting the surface layer portion of the composite incombustible heat insulating stretch layer A is 7 mm, the thickness Tb of the incombustible heat insulating stretch layer Ab constituting the center portion is 23 mm, and the composite incombustible heat insulating property. The thickness T of the stretchable layer A is 30 mm.

  And the heat ray reflective layer B (thickness: 5 mm) which formed the reflective mirror surface 4 on the base material sheet 1 shown in FIG. The material F is configured.

  When the nonflammable heat insulating elastic stretch protective material F having the above-described dimensions shown in FIG. 7 is manufactured, the nonflammable heat insulating stretchable layer A, which is the main component thereof, is a soft open-cell rubber made of ethylene-propylene-diene rubber (EPDM rubber). Sponge (approximately 8 times foaming, apparent density: 0.13, tensile strength: 95 kPa, elongation: 350%, compression hardness: 5.6 kPa / 50%) is used as a constituent base material, and this is a constant thickness (about 5 mm) 120 slices were cut into a size of 300 × 300 mm, and 120 base material sheets 1 (average 55.7 g / sheet) of Examples were prepared.

  Moreover, in the flame retardant containing film forming sheet 3 shown in FIG. 3 of the laminated material constituting the non-flammable heat-insulating elastic layer A, the elastic flame retardant film 2 formed by impregnating the surface of the base sheet 1 by coating. As the elastic matrix, an oxime curing type cyclotetrasiloxane solution (component concentration: 63%) was employed.

  Moreover, in the incombustible heat insulation elastic layer Aa which comprises the surface layer part of the incombustible heat insulation elastic layer A which is the main structural member of the incombustible heat insulation elastic expansion / contraction protective material F shown in FIG. 7, the incombustibility which comprises the incombustible heat insulation elastic layer Aa The additive inorganic compound flame retardant component of the elastic flame retardant film 2a formed by impregnation by coating on the surface of the agent forming film forming sheet 3a is composed of aluminum hydroxide (melting point: 300 ° C.) and low melting point inorganic A compound fusion frit bottle (phosphate glass bottle, melting point: 360 ° C.) was used in combination, and the composition ratio was 6: 1.

  The coating flame retardant liquid of the elastic flame retardant film 2a formed by coating the surface of the base sheet 1 with this combined inorganic compound flame retardant is a surface layer portion with respect to 100 g of the siloxane solution (solid content: 63%). Is a solution (inorganic flame retardant rate: 60.35%) in which 153.4 g of the combined inorganic compound flame retardant suitable for the non-flammable heat-insulating stretchable layer Aa is uniformly mixed.

An average of 91.2 g (0.101 g / cm ² ) of this coating flame retardant solution was applied to the surface of a substrate sheet 1 (average weight: 55.7 g / sheet) of 5 mm × 300 mm × 300 mm, and 60 sheets of nonflammable The agent-containing film-forming sheet 3a is manufactured, and further laminated, and the thickness Ta is set to about 300 mm or more, and cured at 30 to 45 ° C. for 24 hours.

  And the laminated block of this flame retardant containing film formation sheet 3a is cut | disconnected by the width 7mm in the direction orthogonal to the horizontal surface of the base material sheet 1, and the nonflammable heat insulation elastic layer Aa shown in FIG. 7 is manufactured.

The amount of the flame retardant attached to the surface (300 × 300 mm) of the substrate sheet 1 at this time (including the elastic siloxane matrix) averaged 77.9 g / sheet (the amount of pure inorganic flame retardant was 55.2 g / sheet). 0.061 g / cm ² ).

  That is, the amount of pure inorganic incombustible agent adhering to the high molecular weight of combustible rubber (55.7 g / sheet) is (55.2 g / sheet), about the same weight (1: 2 to 2: 1 Can be set to a range.)

  Moreover, in the incombustible heat insulation elastic layer Ab which comprises the center part of the incombustible heat insulation elastic layer A which is a main structural member of the incombustible heat insulation elastic elastic protection material F shown in FIG. 7, the incombustible heat insulation elastic layer Ab is comprised. Inorganic flame retardant components added to the elastic flame retardant coating 2b formed by impregnation by coating on the surface of the flame retardant-containing coating film forming sheet 3b are aluminum hydroxide (melting point: 300 ° C.) and magnesium carbonate crystals. The powder (melting point: 350 ° C.) was used in combination, and the composition ratio was 6.5: 1.

  The coating flame retardant liquid of the elastic flame retardant coating 2b formed by coating the surface of the base sheet 1 with this combined inorganic compound flame retardant is the center of the siloxane solution (solid content: 63%) with respect to 100 g. This is a solution (inorganic flame retardant rate: 60.28%) in which 151.8 g of the combined inorganic compound flame retardant suitable for the non-flammable heat-insulating stretchable layer Ab constituting the part is added and uniformly mixed.

An average of 90.3 g (0.10033 g / cm ² ) of this coating flame retardant solution was applied to the surface of a 5 mm × 300 mm × 300 mm substrate sheet 1 (average weight: 55.7 g / sheet). An incombustible agent-containing film-forming sheet 3b is manufactured, and further laminated to make a thickness Tb of about 300 mm or more, and cured at 30 to 45 ° C. for 24 hours.

  And the laminated block of this flame retardant containing film formation sheet 3b is cut | disconnected by the width 23mm in the direction orthogonal to the horizontal surface of the base material sheet 1, and the nonflammable heat insulation elastic layer Ab shown in FIG. 7 is manufactured.

The amount of flame retardant attached to the substrate sheet 1 (300 × 300 mm) at this time (including the elastic siloxane matrix) averaged 77.0 g / sheet (the amount of pure inorganic flame retardant was 54.4 g / sheet: 0.00). 060 g / cm ² ).

  That is, for the flammable rubber high molecular weight (55.7 g / sheet), the amount of pure inorganic incombustible agent adhering correspondingly (54.4 g / sheet) is about the same weight (1: 2 to 2: 1). Can be set to a range.)

  The non-combustible and heat-insulating stretchable layer Aa having a thickness of 7 mm and the non-flammable and heat-insulating stretchable layer Ab having a thickness of 23 mm constituting the surface layer portion manufactured by the above method are further laminated and bonded as shown in FIG. The composite incombustible heat insulating stretchable layer A having a layer thickness of 30 mm shown in FIG. 7 is formed.

Moreover, in the heat ray reflective layer B arranged in the lowermost layer of the non-combustible heat-insulating elastic expansion / contraction protective material F shown in FIG. 7, the surface of the base material sheet 1 (300 × 300 mm) has a heat resistant zinc silver paint (components: zinc, aluminum). , Solid content: 55%) was applied at about 9.0 g / sheet (0.01 g / cm ² ), dried at room temperature, and then adhesively deployed to the lower surface of the 30 mm-thick composite noncombustible heat-insulating stretch layer A.

  A combustion heat insulation performance test of the non-combustible heat insulation elastic stretch protection material F having a thickness of 35 mm and a thickness of 300 mm × 300 mm thus manufactured was performed using the combustion heat insulation performance test apparatus shown in FIG.

A polyethylene foam having a thickness of 150 mm, 425 mm × 425 mm (density: 0.03 g / cm ² , tensile force: 0.08 MPa, elongation: 170%, 50% compression hardness: 0.0035 MPa) is applied as the loose functional material b. .

  The non-combustible heat-insulating elastic stretch protective material F of the test specimen is a composite non-flammable heat-insulating elastic layer A having a thickness of 35 mm and 300 mm × 300 mm, and the non-combustible heat-insulating elastic layer Aa constituting the surface layer portion is 7 mm in thickness and 300 mm × 300 mm. It is set as the vertical direction laminated body. Moreover, let the nonflammable heat-insulation elastic layer Ab which comprises an inner center part be the longitudinal direction laminated body of thickness 23mm and 300 mm x 300 mm.

  The temperature measurement sensor is a needle-type (φ3) sensor SWP-01 (measurement range: −40 ° C. to 240 ° C., accuracy: ± 0.5 ° C.) manufactured by Sato Keiki Seisakusho, and a digital thermometer SK- Measure at 250 WP.

  In the experimental set, as shown in FIG. 8, a needle-type sensor SWP-01 is inserted in the center of the play functional material B, and the tip of the sensor protrudes about 2 mm. On the upper surface, the center of the non-combustible heat-insulating elastic elastic protective material F having a thickness of 35 mm and 300 mm × 300 mm is matched and overlapped by 90 degrees. In other words, the tip of the temperature measuring sensor that protrudes from the center surface of the play functional material B comes into contact with the center bottom surface of the non-combustible heat-insulating elastic stretch protection material F.

The combustion test heat source is a road work signal flame tube road flame 15AR (φ30 × 250L, combustion time: 15 minutes, combustion temperature: about 1,300 ° C.) manufactured by Nippon Carlit Co., Ltd. A flame outlet was attached at a position about 100 mm away from the center along the diagonal line, and the flame test was conducted by inclining the surface of the non-combustible heat-insulating elastic elastic protective material F at an angle of 15 degrees diagonally.
The results were as shown in Table 1.

  In addition, the incombustible heat-insulating elastic expansion / contraction protective material F of the present invention is not formed of a single material, but is composed of a plurality of materials, and exhibits a performance by a synergistic effect of the functions of each material. Therefore, it is difficult to make a judgment by applying a flame retardant test method according to JIS K6400-6 and its evaluation criteria, but it can be used as a guideline for performance evaluation of partial materials. JIS K6400-6 The flame retardant test according to was carried out by the following method.

  The flame-retardant test sample is a non-flammable heat-insulating elastic layer Aa and a non-flammable material that constitutes the central portion of the non-flammable heat-insulating elastic layer A that is the main component of the non-flammable heat-insulating elastic elastic material F shown in FIG. It samples from the laminated block of the flame retardant containing film forming sheet 3a and the flame retardant containing film forming sheet 3b constituting the heat insulating stretchable layer Ab.

  In the production of each laminated block, the elastic flame retardant coatings 2a and 2b containing each flame retardant are applied to the base sheet 1 (average weight: 55.7 g / sheet) of 5 mm × 300 mm × 300 mm in the same manner as described above. Coating is performed to manufacture each of the incombustible agent-containing film-forming sheets 3a and 3b, and 10 sheets of each are laminated (thickness: 50 mm).

  Each of these laminated blocks (thickness: 50 mm) is cut into 10 mm × 150 mm in a direction orthogonal to the laminated sheet surface to obtain a flame retardant test piece f of 10 t × 50 w × 150 L.

As shown in FIG. 9, this flame-retardant test piece f is horizontally arranged on a wire mesh, a combustion test burner instructed by JIS K6400-6 is set at the tip of the sample piece, and the indicated combustion flame is used for 60 seconds. Indirect flame combustion was performed, and the fire extinguishing time and combustion state of the subsequent samples were confirmed.
The results were as shown in Table 2 and Table 3, respectively.

  As mentioned above, although the incombustible heat-insulating elastic expansion / contraction protective material of the present invention has been described based on the examples thereof, the present invention is not limited to the configurations described in the above-described examples, and is appropriately within a range not departing from the gist thereof. The configuration can be changed.

  The incombustible heat-insulating elastic stretch protective material of the present invention is inserted as a protective layer into the surface layer of the expansion / contraction device, and even if a high-heat combustion flame or high heat acts on the surface layer, it itself does not cause a similar fire spread or high-temperature fire, It has the characteristic that it can form a thin, large stretch protective layer that blocks the high temperature of the surface layer and protects the play function material such as water-stopping material and soundproof material inserted between the expansion device play. Therefore, it is inserted and laid on the surface layer of functional materials such as stretchable waterproofing materials and stretchable soundproofing materials that are laid in the stretchable space. It can be suitably used for non-flammable heat-insulating elastic expansion / contraction protective materials that protect the loose functional material from ignition and thermal damage and that do not ignite and spread.

A non-combustible heat-insulating stretch layer Aa non-combustible heat-insulating material formed by laminating a non-combustible agent-containing film-forming sheet formed of an elastic fire-retardant film containing a non-combustible agent that constitutes the surface layer of an incombustible heat-insulating elastic stretch protective material Stretchable layer Ab Nonflammable heat-insulating elastic layer formed by laminating a flame-retardant-containing film-forming sheet formed of an elastic flame-retardant film containing a flame-retardant that constitutes the central part of the flame-retardant heat-insulating elastic stretch-protecting material B Heat ray reflective layer F Incombustible heat insulating elastic stretch protective material J Stretch device P Stretch device idle wave plate A Protective layer B Play functional material 1 Base sheet 2 Elastic flame retardant coating 2a Elastic flame retardant coating 2b Elastic flame retardant coating 3 Flame retardant containing film forming sheet 3a Flame retardant containing film forming sheet containing an inflammable agent containing film 3b Flame retardant containing an elastic flame retardant containing film containing a flame retardant Film-forming sheet 4 Reflective mirror surface

Claims (6)

  An incombustible heat-insulating elastic expansion / contraction protective material provided as a protective layer on the surface layer of the expansion / contraction device, wherein an elastic flame retardant coating containing a flame retardant is formed on the surface layer of a base sheet made of a flexible elastic rubber open-cell sponge material A non-combustible heat-insulating elastic stretchable protective material comprising a non-combustible heat-insulating stretchable layer formed by laminating a nonflammable agent-containing film-forming sheet.   The non-combustible heat-insulating elastic elastic protective material according to claim 1, wherein the non-combustible agent is composed of a compound that melts with low combustion heat and thermally decomposes to generate carbon dioxide that is a non-combustible gas.   The incombustible heat-insulating elastic expansion-contraction protective material according to claim 1 or 2, wherein frit soot made of an inorganic compound that melts with low combustion heat is added to the incombustible agent.   The non-combustible heat-insulating elastic layer is formed of a non-combustible heat-insulating elastic layer formed by laminating a non-combustible agent-containing film-forming sheet formed with an elastic non-combustible agent film containing an incombustible agent added with frit soot. The incombustible heat-insulating stretch layer formed by laminating a flame-retardant-containing film-forming sheet on which an elastic flame-retardant film containing a flame-retardant without adding soot is formed is used at the center. 3. A non-combustible heat-insulating elastic expansion / contraction protective material according to 3.   The non-combustible heat-insulating elastic stretch layer according to claim 1, 2, 3, or 4, wherein the non-combustible heat-insulating elastic layer is formed by laminating the non-combustible agent-containing film forming sheet in a horizontal direction or a vertical direction. Protective layer.   6. The incombustible heat insulating property according to claim 1, wherein a heat ray reflective layer having a reflecting mirror surface for reflecting heat rays is bonded and integrated on a lowermost surface of the incombustible heat insulating stretchable layer. Elastic stretch protection material.

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