Fire protection laminated body and production method thereof

Abstract

To provide a fire protection laminated body excellent in non-combustibility and excellent in workability taking it into account material with non-combustibility may be required for wood or wooden material used for inner decoration at a place where specific inner decoration required, as well as with good workability at a construction site may be required for the wood or wooden material used for the inner decoration.SOLUTION: A fire protection laminated body comprises: a base body of wood or wood material in a flat plate shape; a fire protection layer positioned on one of surfaces of the base body; and an adhesive layer, wherein the fire protection layer has two or more flame retardant treated woods lined side by side in a surface direction of one of the surfaces, and a part or all of the adhesive layer is positioned between the base body and the fire protection layer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fireproof laminate and a method for producing the same. [Background technology]

[0002] Wood or wood-based materials are used for interior materials, structural materials, underlayment materials, etc. in buildings. Wood or wood-based materials used in buildings are sometimes required to be non-flammable. Examples of non-flammable wood or wood-based materials include flame-retardant treated wood impregnated with flame-retardant chemicals. The use of such flame-retardant treated wood can improve the fire prevention and fire resistance of buildings.

[0003] For example, Patent Document 1 proposes a fireproof and fire-resistant structure for wooden exterior walls, in which a base material made of wood is arranged as a base for exterior wall finishing materials, and this base material is made to have a thickness of 30 mm or more, thereby providing fire prevention and fire resistance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-348558 Summary of the Invention [Problem to be solved by the invention]

[0005] When wood or wood materials are used for interior decoration, they may be subject to interior decoration restrictions under the Building Standards Act. For this reason, in areas subject to interior decoration restrictions, wood or wood materials used for interior decoration are required to be non-combustible materials (non-combustible materials, semi-non-combustible materials, or flame-retardant materials; hereinafter, sometimes referred to as "fire-resistant materials"). In addition, wood or wood materials used for interior decoration are required to be easy to install at the construction site (excellent installability). Furthermore, wood or wood materials used for interior decoration are required to look good (beautiful). The present invention aims to provide a fireproof laminate that is excellent in fire resistance and workability. [Means for solving the problem]

[0006] The present invention has the following aspects. <1> The fireproofing device has a base body that is a flat wood or wood material, a fireproofing layer that is located on one surface of the base body, and an adhesive layer, The fireproof layer has two or more flame-retardant treated wood pieces arranged in a planar direction on the one surface, A fire-resistant laminate, wherein part or all of the adhesive layer is located between the substrate and the fire-resistant layer. <2> The adhesive layer has a basis weight of 200 to 350 g / m 2 That is, <1> The fireproof laminate according to claim 1. <3> The flame-retardant treated wood has a chamfer between one or both surfaces facing the adjacent other flame-retardant treated wood and the surface facing the substrate. <1> or <2> The fireproof laminate according to claim 1. <4> The substrate is plywood, laminated wood, or cross-laminated timber. <1> ~ <3> 10. The fireproof laminate according to claim 9, wherein

[0007] <5> A method for producing a fireproof laminate having a base body that is a flat wood or wood-based material and a fireproof layer located on one surface of the base body, comprising: two or more pieces of flame-retardant treated wood are arranged on one surface of the substrate in the surface direction of the one surface via a first adhesive to form the fireproof layer; The first adhesive is then cured to adhere the fire-resistant layer to the substrate. <6> A method for producing a fireproof laminate having a base body that is plywood, glued laminated timber, or cross-laminated timber, and a fireproof layer located on one side of the base body, comprising: two or more planks are stacked together via a second adhesive to form a substrate precursor; two or more pieces of flame-retardant treated wood are arranged on one surface of the substrate precursor via a first adhesive in a planar direction of the surface of the sawn board to form the fireproof layer; Next, the second adhesive is cured to turn the substrate precursor into the substrate, and the first adhesive is cured to bond the fire protection layer to the substrate. [Effects of the Invention]

[0008] The fireproof laminate of the present invention has excellent fire-retardant properties and excellent workability. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a fireproof laminate according to a first embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of a fireproof laminate according to a first embodiment of the present invention. [Figure 3] 1 is a partially enlarged view of a cross section of a fireproof laminate according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a partially enlarged cross-sectional view of a fireproof laminate according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] In this specification and claims, the use of "to" indicating a range of values ​​means that the values ​​before and after it are included as the lower and upper limits. In this paper, "wood" which is cut into any size from felled trees, and "wood-based materials" which are wood divided into its component parts and reconstructed, are collectively referred to as "wood-based materials." Furthermore, "flame-retardant treated wood" is a wood-based material that, by itself, meets the standards for fire-resistant materials as stipulated in Article 2, Paragraph 9 of the Building Standards Act and Article 108-2 (non-flammable materials) of the Enforcement Order of the Building Standards Act, Article 1, Paragraph 5 of the Order (semi-non-flammable materials), and Article 1, Paragraph 6 of the Order (flame-retardant materials). 1 to 4 are schematic diagrams for easily explaining the configuration, and the dimensional ratios of the components may differ from the actual ones.

[0011] The fireproof laminate of the present invention has a substrate that is a flat wood-based material, a fireproof layer that is located on one surface of the substrate, and an adhesive layer. Hereinafter, the present invention will be described with reference to embodiments.

[0012] (First embodiment) A fireproof laminate according to a first embodiment of the present invention will be described. The fireproof laminate 1 in Fig. 1 has a substrate 2 and a fireproof layer 4 located on one surface of the substrate 2. An adhesive layer 6 is located between the substrate 2 and the fireproof layer 4. An example of the fireproof laminate 1 is a so-called siding board. In the fireproof laminate 1 of this embodiment, the fireproof layer 4 forms a surface layer.

[0013] The shape of the fireproof laminate 1 in plan view is not particularly limited, and may be circular or polygonal. The size in a plan view of the fireproof laminate 1 can be determined appropriately depending on the application. The fireproof laminate 1 is, for example, a rectangular flat plate having a width of 50 to 3600 mm and a length of 900 to 6200 mm. The thickness T1 of the fireproof laminate 1 is, for example, 42 to 530 mm. When the thickness T1 is equal to or greater than the above lower limit, the rigidity of the fireproof laminate 1 can be further increased. When the thickness T1 is equal to or less than the above upper limit, the fireproof laminate 1 can be made lighter and easier to handle.

[0014] The fireproof laminate 1 is a noncombustible material, a semi-noncombustible material, or a flame-retardant material. The classification of noncombustible material, semi-noncombustible material, or flame-retardant material is determined by conducting a heat generation test using a cone calorimeter and classifying the obtained heating time into the classification specified in Article 2, item 9 of the Building Standards Act and Article 108-2 (noncombustible materials), Article 1, item 5 (semi-noncombustible materials), or Article 1, item 6 (flame-retardant materials) of the Enforcement Order of the Building Standards Act. The classification of the fireproof laminate 1 is adjusted by combining the type or thickness of the flame-retardant treated wood, the type of the substrate 2, the type of adhesive, and the like, as will be described later.

[0015] <Base> The base 2 is a flat wooden material. Examples of the base 2 include wooden materials such as plywood, laminated timber, and cross-laminated timber (hereinafter sometimes referred to as "CLT"), which are made by stacking pieces of wood, and solid wood, which is a single piece of wood. The fireproof laminate 1 in FIG. 2 is an example in which CLT is used as the base 2 . The substrate 2 has a three-layer structure in which layers 22, 24, and 26 are stacked in this order, with adjacent layers glued together in the stacking direction. Each of the layers 22, 24, and 26 is made up of sawn boards (also called "lamina") or timbers (including those prepared by joining and adhering them lengthwise with their fiber directions approximately parallel to each other) arranged or glued together in the width direction with their fiber directions approximately parallel to each other. The layers 22, 24, and 26 are also called "plies." In the layers 22, 24, and 26, adjacent sawn boards in the stacking direction have their fiber directions approximately perpendicular to each other. In this embodiment, the CLT of the base 2 has a three-layer structure, but the present invention is not limited to this. When the base 2 is CLT, it may have four or more layers. There is no particular upper limit on the number of CLT layers, but it may be, for example, seven layers.

[0016] Materials used for the sawn boards that make up CLT include cedar and cypress.

[0017] The thickness T2 of the substrate 2 can be appropriately determined taking into consideration the use of the fireproof laminate 1, and is, for example, 30 to 500 mm. When the thickness T2 is equal to or greater than the above lower limit, the rigidity of the fireproof laminate 1 can be further increased. When the thickness T2 is equal to or less than the above upper limit, the fireproof laminate 1 can be made lighter and easier to handle.

[0018] <Fire protection layer> The fireproof layer 4 has two or more pieces of flame-retardant treated wood 42. Each piece of flame-retardant treated wood 42 is a flat plate with one longitudinal direction. The two or more pieces of flame-retardant treated wood 42 are arranged in the surface direction of the base 2 with their longitudinal ends butted against each other to form the fireproof layer 4.

[0019] The fire-retardant treated wood 42 is a non-combustible material, a semi-non-combustible material, or a fire-retardant material. The fire-retardant treated wood 42 constituting the fire-resistant layer 4 may be a wood material such as solid sawn board or laminated wood impregnated with a fire-retardant agent. Examples of materials for sawn boards made from fire-retardant treated wood 42 include cedar and cypress. The flame retardant is a chemical that imparts flame retardancy to wood-based materials. Conventionally known flame retardants can be used as the flame retardant. Examples of the flame retardant include phosphoric acid-based flame retardants, boric acid-based flame retardants, and nitrogen-based flame retardants. Examples of the phosphoric acid-based flame retardant include nitrogen phosphate-based flame retardants such as guanidine phosphate-based agents and ammonium phosphate-based agents. Examples of boric acid-based flame retardants include borax and borate-based agents.

[0020] The amount of flame retardant agent impregnated into the sawn board is determined appropriately taking into consideration the flame-retardant performance required of the flame-retardant treated wood 42, the type of flame retardant agent, etc. The amount of flame retardant agent impregnated is determined appropriately depending on the material of the sawn board. When the sawn board is made of solid cedar, the amount of flame retardant agent impregnated is determined appropriately taking into consideration the flame-retardant performance required of the sawn board, the type of flame retardant agent, etc. 3 That is, the impregnation amount of the flame retardant agent to the sawn board is, for example, 150 to 400 kg / m 3 is.

[0021] The width of the sawn board that is the material of the flame-retardant treated wood 42 is not particularly limited, but is set to, for example, 80 to 200 mm.

[0022] The thickness T4 of the fireproof layer 4 (i.e., the thickness of the flame-retardant treated wood 42) is preferably, for example, 12 to 30 mm. When the thickness T4 is equal to or greater than the above-mentioned lower limit, the fireproof performance of the fireproof laminate 1 can be further improved. In addition, when the thickness T4 is equal to or greater than the above-mentioned lower limit, leakage of adhesive onto the surface of the fireproof layer 4 during production of the fireproof laminate 1 can be more effectively prevented, making the fireproof laminate 1 more aesthetically pleasing. When the thickness T4 is equal to or less than the above-mentioned upper limit, the fireproof laminate 1 can be made lighter in weight and easier to handle.

[0023] Examples of flame-retardant treated wood 42 include "Super D Panel (registered trademark)" (semi-non-combustible material) manufactured by Koshii Wood Industry Co., Ltd., "Moengen (registered trademark)" (non-combustible material) manufactured by Kaga Wood Co., Ltd., and "Efnen 65S" (non-combustible material, semi-non-combustible material) manufactured by Yokotani Co., Ltd.

[0024] <Adhesive layer> The adhesive layer 6 is a layer formed from a cured product of an adhesive. The adhesive can be appropriately selected taking into consideration the type of flame-retardant treated wood 42, the type of substrate 2, and the like. Examples of adhesives include thermosetting adhesives and thermoplastic resin adhesives, and among these, thermosetting adhesives are preferred. Examples of thermosetting adhesives include resorcinol resin adhesives, urethane resin adhesives, and silicone resin adhesives. The adhesive may be a one-component adhesive or a two-component adhesive.

[0025] Examples of resorcinol resin adhesives include two-component adhesives containing a base agent and a curing agent. Examples of base agents for two-component resorcinol resin adhesives include D-300A (manufactured by Oshika Co., Ltd.), D-320 (manufactured by Oshika Co., Ltd.), D-97 (manufactured by Oshika Co., Ltd.), and D-95 (manufactured by Oshika Co., Ltd.). Examples of curing agents for resorcinol resin adhesives include DL-880 (manufactured by Oshika Co., Ltd.). The mass ratio of the base agent to the curing agent (base agent:curing agent) is, for example, 100:10-50. Examples of urethane resin adhesives include Selecty UR-20 (manufactured by Oshika Co., Ltd.). Examples of silicone resin adhesives include Selecty MS-330A (manufactured by Oshika Co., Ltd.).

[0026] <Manufacturing method> The manufacturing method of the fire-resistant laminate 1 of this embodiment involves placing flame-retardant treated wood 42 on one side of the base 2 via a first adhesive to form a fire-resistant layer 4 (lamination process), and then hardening the first adhesive to adhere the flame-retardant treated wood 42 to the base 2 (hardening process).

[0027] The lamination process includes, for example, a coating operation and a placing operation. In the coating operation, the first adhesive is coated on one surface of the substrate 2. The coating amount of the first adhesive in the coating operation (i.e., the basis weight of the adhesive layer 6) is 200 to 350 g / m 2 When the amount of the first adhesive applied is equal to or greater than the above-mentioned lower limit, the substrate 2 and the flame-retardant treated wood 42 can be more firmly bonded. When the amount of the first adhesive applied is equal to or less than the above-mentioned upper limit, the first adhesive can be effectively prevented from leaking onto the surface of the fireproof layer 4, resulting in a more beautiful appearance.

[0028] FIG. 3 is an enlarged view of region S in FIG. When the laminate precursor is pressed in the pressing operation described below, as shown in Figure 3, uncured first adhesive may seep into gaps 48 formed between adjacent pieces of flame-retardant treated wood 42. If the amount of first adhesive applied in the application step is equal to or less than the above-mentioned upper limit, the first adhesive that has entered the gaps 48 is more reliably prevented from leaking onto the surface of the flame-retardant treated wood 42 (i.e., the surface of the fireproof layer 4 in the fireproof laminate 1), thereby making the surface of the fireproof laminate 1 beautiful. The first adhesive that has penetrated into the gaps 48 hardens through the curing step described below, forming infiltrated adhesive joints 62.

[0029] The method for applying the first adhesive in the application operation is not particularly limited, and an example thereof is a method in which a desired amount of adhesive is poured onto the base 2 from a filling machine while the base 2 is being transported in the planar direction.

[0030] In the placing operation, the fireproof layer 4 is placed on the adhesive-coated surface (one surface) of the base 2. In the placing operation, the fireproof layer 4 is formed by arranging the fireproof wood pieces 42 on one surface of the base 2 while butting the longitudinal edges of adjacent pieces of fireproof wood 42 together. In this way, a laminate precursor is obtained in which the fireproof layer 4 is laminated on one surface of the substrate 2 via the first adhesive. The surface of the fireproof layer 4 of the laminate precursor may be covered with a protective film. Covering the surface of the fireproof layer 4 with a protective film prevents the surface of the flame-retardant treated wood 42 from being damaged during the pressing operation described below. This makes the fireproof laminate 1 more beautiful.

[0031] The curing step cures the first adhesive and bonds the fire-resistant layer 4 to the substrate 2. The curing step includes, for example, at least one of a heating operation and a pressing operation. The method for curing the first adhesive is determined appropriately depending on the type of the first adhesive, environmental conditions, etc. For example, if the first adhesive is a thermosetting adhesive, the curing step includes a heating operation for heating the first adhesive at a desired temperature. Also, for example, if the environmental temperature (air temperature) is sufficiently high, the heating operation may be omitted, and the first adhesive may be cured by performing a pressing operation (cold pressure bonding).

[0032] In order to bond the substrate 2 and the fire-retardant treated wood 42 more firmly, the curing process may include heating and pressing operations. When the curing step includes a heating operation and a pressing operation, the pressing operation is performed, for example, before heating the first adhesive (heating operation), or while heating the laminate precursor.

[0033] The time from the start of the placing operation to the start of pressing (deposition time) is preferably 30 minutes or less. When the deposition time is equal to or less than the above upper limit, the fireproof layer 4 can be more firmly bonded to the base body 2.

[0034] Examples of the pressing method in the pressing operation include a method using a press machine and a method of pressing between endless belts facing each other above and below. The pressure during pressing (pressing pressure) is determined appropriately depending on the material of the substrate 2, the material of the flame-retardant treated wood 42, the type and impregnation amount of the flame retardant agent, etc., and is, for example, 0.98 to 1.27 MPa in the thickness direction of the laminate precursor. The pressing operation time (the time during which pressing is performed at a given pressure = pressing time) is set to, for example, 16 hours or more.

[0035] Examples of heating methods for the heating operation include a method in which the laminate precursor is heated in a heating furnace at an arbitrary atmospheric temperature (atmospheric heating method), and a method in which the laminate precursor is placed between electrodes and high frequency waves are applied (high frequency method). The heating temperature in the heating operation can be appropriately determined depending on the curing temperature of the first adhesive. The heating time in the heating operation (the time during which heating is performed at a given ambient temperature in the direct heating method, or the time during which a given current value is applied in the high frequency method) is determined appropriately depending on the type of adhesive, the amount of adhesive applied, etc.

[0036] Examples of the device for carrying out the curing step include a high frequency bonding machine and a cold press machine.

[0037] After the curing step, the first adhesive is cured to form an adhesive layer 6, and the fireproof layer 4 is bonded to the substrate 2 to obtain the fireproof laminate 1. In the fireproof laminate 1, part of the adhesive layer 6 may penetrate into the gaps between the flame-retardant treated wood 42 to form a penetrating adhesive joint 62 (FIG. 3). Therefore, in this embodiment, part (when a penetrating adhesive joint 62 is formed) or all (when a penetrating adhesive joint 62 is not formed) of the adhesive layer 6 is located between the substrate 2 and the fireproof layer 4.

[0038] The method for producing a fireproof laminate may include a cutting step after the curing step, in which the edges of the fireproof laminate 1 obtained in the curing step are cut and shaped to a desired size. The cutting method in the cutting step is not particularly limited.

[0039] When the substrate 2 is plywood, laminated wood, or CLT, the fireproof laminate may be manufactured by the following procedure (bulk curing method). Two or more planks are stacked with the second adhesive interposed therebetween to form a substrate precursor. Two or more pieces of flame-retardant treated wood are arranged in the plane direction of the planks, with the first adhesive interposed, on one side of the planks constituting the substrate 2 (lamination process). In this way, a laminate precursor is obtained in which layer 26, second adhesive, layer 24, second adhesive, layer 22, first adhesive, and flame-retardant treated wood 142 are stacked in this order. In the obtained laminate precursor, the first adhesive and second adhesive are uncured. The laminate precursor is then subjected to a curing step, in which the pressing and heating operations are the same as those described above.

[0040] The second adhesive is similar to the first adhesive and can be appropriately determined taking into consideration the material of the lumber, etc. The second adhesive may be the same as the first adhesive or may be different.

[0041] According to the batch curing method, the base material and the fireproof layer can be formed at the same time, thereby increasing productivity.

[0042] <Mechanism of action> According to the fireproof laminate of this embodiment, a fireproof layer made of flame-retardant treated wood is formed on one surface of the substrate, so that the fireproof laminate can be endowed with excellent non-combustible properties. In addition, according to the fireproof laminate of this embodiment, the base and the fireproof layer are integrated, so the work of bonding the flame-retardant treated wood at the construction site can be omitted, resulting in excellent workability. In the fireproof laminate of this embodiment, the basis weight of the adhesive layer is within a specific range, so that the adhesive is prevented from being exposed on the surface of the fireproof layer, and the fireproof laminate can be made more beautiful.

[0043] (Second embodiment) Regarding the fireproof laminate according to the second embodiment of the present invention, the same components as those in the first embodiment will be assigned the same reference numerals and their description will be omitted, and the description will be focused mainly on the components that are different from those in the first embodiment. 4 includes a substrate 2, a fireproof layer 104 located on one surface of the substrate 2, and an adhesive layer 6. Note that FIG. 4 is an enlarged view of a region corresponding to region S in FIG. 2. The fireproof layer 104 has two or more pieces of flame-retardant treated wood 142. Each piece of flame-retardant treated wood 142 is a flat plate with one longitudinal direction. The two or more pieces of flame-retardant treated wood 142 are arranged in the surface direction of the base 2 with their longitudinal ends butted against each other to form the fireproof layer 104.

[0044] The flame-retardant treated wood 142 has a chamfered portion 144 between the surface facing the adjacent other flame-retardant treated wood 142 and the surface facing the base 2. This chamfered portion 144 extends in the longitudinal direction of the flame-retardant treated wood 142. That is, the flame-retardant treated wood 142 has a slight chamfer formed at the seam on the back surface (the surface facing the base 2). The shape of the chamfered portion 144 is not particularly limited, and may be either straight or curved in cross section (FIG. 4). The degree of chamfering of the chamfered portion 144 is preferably, for example, a chamfer width of more than 0 mm and not more than 3 mm. When the chamfer width is not more than the above upper limit, the non-combustible performance can be further improved. The chamfered portion 144 may be formed on only one of the two longitudinal sides of the flame-retardant treated wood 142, or may be formed on both of the two longitudinal sides. The chamfered portions 144 may be formed on all of the flame-retardant treated wooden pieces 142 that make up the fire-resistant layer 104, or may be formed on only a portion of the flame-retardant treated wooden pieces 142.

[0045] The thickness of the fireproof layer 104 (ie, the thickness of the flame-retardant treated wood 142) is, for example, 12 to 30 mm. The dimensions of the flame-retardant treated wood 142 are similar to those of the flame-retardant treated wood 42 . The material of the flame retardant treated wood 142 (such as the material of the solid wood, the type and amount of flame retardant chemical impregnated, etc.) is the same as that of the flame retardant treated wood 42.

[0046] <Manufacturing method> The method for producing the fireproof laminate 101 of this embodiment is the same as that of the first embodiment, except that the fire-retardant treated wood 42 is replaced with the fire-retardant treated wood 142 . In the placing operation of the method for producing the fireproof laminate 101 of this embodiment, the fireproof layer 104 is formed by placing the flame-retardant treated wood 142 with the surface on which the chamfered portion 144 is formed facing the base 2 . In the coating step of the method for producing the fireproof laminate 101 of this embodiment, the coating amount (basis weight) of the first adhesive is 200 to 350 g / m 2 When the amount of the first adhesive applied is equal to or greater than the above-mentioned lower limit, the substrate 2 and the flame-retardant treated wood 142 can be more firmly bonded. When the amount of the first adhesive applied is equal to or less than the above-mentioned upper limit, the first adhesive can be effectively prevented from leaking onto the surface of the fireproof layer 104, resulting in a more beautiful appearance.

[0047] The pressing operation in the curing step of this embodiment is the same as that of the first embodiment. In the pressing operation of this embodiment, when the first adhesive tries to penetrate into the gaps 148 between the pieces of flame-retardant treated wood 142, the first adhesive is pooled in the chamfered portions 144. Therefore, the first adhesive is not exposed on the surface of the flame-retardant treated wood 142 (i.e., the surface of the fire-protective layer 104). The heating operation in the method for producing the fireproof laminate 101 of this embodiment is the same as the heating operation in Embodiment 1. After the heating operation, a stored and cured adhesive 162 is formed in the chamfered portion 144 of the fireproof laminate 101.

[0048] <Mechanism of action> According to the fireproof laminate of this embodiment, a fireproof layer made of flame-retardant treated wood is formed on one surface of the substrate, so that the fireproof laminate can be endowed with excellent non-combustible properties. In addition, according to the fireproof laminate of this embodiment, the base and the fireproof layer are integrated, so the work of bonding the flame-retardant treated wood at the construction site can be omitted, resulting in excellent workability. According to the fireproof laminate of this embodiment, a chamfer is formed at the width seam on the back side of the flame-retardant treated wood, so that the surface of the fireproof layer (i.e., the surface of the fireproof laminate) can be made beautiful.

[0049] (Other embodiments) In the above-described embodiment, the fireproof laminate is composed of a fireproof layer, a substrate, and an adhesive layer, but the present invention is not limited to this. For example, the fireproof laminate may have a coating layer on a part of its surface (for example, only the surface (exposed surface) of the flame-retardant treated wood) or on the entire surface. Examples of the coating layer include a urethane resin coating layer.

[0050] In the above-described embodiment, the fireproof layer has a single layer structure, but the present invention is not limited to this, and the fireproof layer may be formed of flame-retardant treated wood laminated in multiple layers.

[0051] In the above-described embodiment, the first adhesive is applied to a substrate in the application operation, but the first adhesive may also be applied to fire-retardant treated wood. [Example]

[0052] The present invention will be described in more detail below using examples, but the present invention is not limited to these examples.

[0053] (Raw materials used) <Base> · Base A: Cedar lamina, width 100mm x thickness 30mm x length 100mm. Base B: Cedar CLT, width 1100mm x thickness 90mm x length 4000mm. Base C: Cedar CLT, width 1100mm x thickness 90mm x length 3960mm. Base D: Cedar lamina, width 100mm x thickness 19mm x length 100mm.

[0054] <Flame-retardant treated wood> Flame-retardant treated wood A: Semi-fire-resistant treated cedar lamina, width 100mm x thickness 15mm x length 100mm, flame retardant = phosphoric acid-based flame retardant, product name "Super D Panel (registered trademark), manufactured by Koshii Wood Industry Co., Ltd." Flame-retardant treated wood B: Non-flammable treated cedar lamina, width 100mm x thickness 15mm x length 100mm, flame retardant = boric acid-based flame retardant, product name "Moengen (registered trademark)", manufactured by Kaga Mokuzai Co., Ltd. Flame-retardant treated wood C: Non-flame-treated cedar lamina, width 110mm x thickness 12mm x length 3960mm, flame retardant = phosphoric acid-based flame retardant, product name "Efnen 65S", manufactured by Hosoda Lumber Co., Ltd. Flame-retardant treated wood D: Semi-fireproof treated cedar lamina, width 110mm x thickness 12mm x length 4000mm, flame retardant = phosphoric acid-based flame retardant, product name "Efnen 65S", manufactured by Chugoku Co., Ltd. Flame-retardant treated wood E: Semi-fireproof treated cedar lamina, width 100mm x thickness 12mm x length 100mm, flame retardant = phosphoric acid-based flame retardant, product name "Efnen 65S", manufactured by Chugoku Co., Ltd.

[0055] <First Adhesive> Adhesive A: Resorcinol resin adhesive, product name "Dianol D-320A", manufactured by Oshika Co., Ltd. Adhesive B: Resorcinol resin adhesive, product name "Dianol D-95", manufactured by Oshika Co., Ltd. Adhesive C: Resorcinol resin adhesive, product name "Dianol D-97", manufactured by Oshika Co., Ltd. Hardener D: Product name: Liquid hardener DL-880, manufactured by Oshika Co., Ltd. Adhesive E: One-component moisture-curing urethane resin adhesive, product name "Selecty UR-20", manufactured by Oshika Co., Ltd.

[0056] (Measurement method) <Heat generation test using a cone calorimeter> For each example of the fireproof laminate, the heat generation test using a cone calorimeter described in the appendix of JIS A 5430:2018 was conducted. The gas generated by heating with a cone heater was ignited with a spark igniter and burned, and the oxygen concentration of the combustion gas was measured.

[0057] <Immersion peel test> According to the immersion delamination test described in Appendix 3(1) of the Japanese Agricultural Standards for Glued Laminated Lumber, each fireproof laminate was immersed in water at room temperature (10°C to 25°C) for 24 hours, then placed in a constant-temperature oven at 70±3°C and dried to a mass within 100-110% of the mass before the test, while avoiding moisture buildup in the oven. The length of delamination in the adhesive layer (excluding those with delamination gaps less than 0.05 mm and those with delamination lengths less than 3 mm; the same applies below) was measured, and the delamination rate was calculated by dividing the total delamination length by the total adhesive layer length. However, when measuring the delamination length, cracks, wood damage due to knots, peeling in areas where knots are present, and whole wood are not considered delamination. The average peeling rate for the two fireproof laminates was calculated and is shown in the table.

[0058] <Boiling peel test> According to the boiling delamination test described in Appendix 3(2) of the Japanese Agricultural Standards for Glued Laminated Lumber, each fireproof laminate was immersed in boiling water for four hours, then in water at room temperature (10°C to 25°C) for one hour. It was then placed in a constant-temperature oven at 70±3°C, and dried to a mass within 100-110% of the mass before the test, while being careful not to trap moisture in the oven. The length of delamination in the adhesive layer was measured, and the total length of delamination was divided by the total length of the adhesive layer to determine the delamination rate. However, when measuring the length of delamination, cracks, damage to the wood due to knots, peeling in areas where knots are present, and whole wood are not considered delamination. The average peeling rate for the two fireproof laminates was calculated and is shown in the table.

[0059] <Decompression and pressure peel test> According to the vacuum-pressure peeling test described in Appendix 3(3) of the Japanese Agricultural Standards for Laminated Lumber, each fireproof laminate was immersed in water at room temperature (10-25°C), subjected to a vacuum of 0.085 MPa for 5 minutes, and then subjected to a pressure of 0.51±0.03 MPa for 1 hour. This treatment was repeated twice, and then the laminate was placed in a constant-temperature oven at 70±3°C and dried to a mass within 100-110% of the pre-test mass, while avoiding moisture buildup. The length of the peeling in the adhesive layer was measured, and the total length of the peeling was divided by the total length of the adhesive layer to determine the peeling rate. However, when measuring the peeling length, cracks, damage to the wood due to knots, peeling in areas where knots are present, and whole wood were not considered to be peeling. The average peeling rate for the two fireproof laminates was calculated and is shown in the table.

[0060] <Whether or not adhesive has leaked onto the surface> For each example of the fireproof laminate, the surface of the fireproof layer was visually observed to check for leakage of the adhesive.

[0061] (Examples 1, 3 to 12) According to the specifications and manufacturing conditions in Tables 1 and 2, the fireproof laminates of the respective examples were manufactured in the following procedure. The first adhesive was applied to one side of the substrate. A flame-retardant treated wood was placed on the first adhesive to form a laminate precursor. The laminate precursor was then pressed under the pressing conditions in the table (pressing operation) and heated under the application conditions in the table (heating operation). The laminate precursor was then pressed for the pressing time in the table to obtain a fireproof laminate. The fireproof laminates obtained were evaluated for non-flammability (heat generation test using a cone calorimeter), adhesive performance (vacuum pressure peel test, immersion peel test, boiling peel test), and whether or not the adhesive had leaked onto the surface. The results are shown in the table. In the table, a rating of "-" indicates that no rating was given.

[0062] (Examples 2, 13, and 14) A fireproof laminate was obtained in the same manner as in Example 1, except that the first adhesive was cured by cold pressure bonding (without heating). The obtained fireproof laminate was subjected to a heat generation test using a cone calorimeter (for evaluation of fireproof materials), an adhesive performance evaluation (vacuum pressure peel test, immersion peel test, boiling peel test), and an evaluation for the presence or absence of adhesive leakage to the surface. The results are shown in the table. In the table, a rating of "-" indicates that no rating was given.

[0063] [Table 1]

[0064] [Table 2]

[0065] As shown in Table 1, in Examples 1 to 2 and 13 to 14 to which the present invention was applied, the results of the heat generation test using a cone calorimeter showed a total heat generation value of 8 MJ / m 2 The maximum heat generation rate is 200 kW / m or less for more than 10 seconds continuously. 2The results confirmed that Examples 1 to 14, which have a fireproof layer made of flame-retardant treated wood, had excellent fire-retardant performance. In addition, the peeling rate was 3% or less in all of Examples 1 to 6 and 9 to 12, in which the present invention was applied, which means that the adhesion between the fireproof layer and the substrate was high and the workability was excellent. [Explanation of symbols]

[0066] 1, 101 Fireproof laminate 2 Base 4, 104 Fire protection layer 6 Adhesive layer 42, 142 Fire-retardant treated wood 144 Chamfered part

Claims

1. The fireproofing device has a base body that is a flat wood or wood material, a fireproofing layer that is located on one surface of the base body, and an adhesive layer, The fireproof layer has two or more flame-retardant treated wood pieces arranged in a planar direction on the one surface, A fire-resistant laminate, wherein part or all of the adhesive layer is located between the substrate and the fire-resistant layer.

2. The adhesive layer has a basis weight of 200 to 350 g / m ２ 2. The fire-resistant laminate of claim 1, wherein

3. 2. The fire-resistant laminate according to claim 1, wherein the flame-retardant treated wood has a chamfer between one or both surfaces facing the adjacent other flame-retardant treated wood and the surface facing the substrate.

4. The fire-resistant laminate according to any one of claims 1 to 3, wherein the substrate is plywood, glued laminated timber, or cross-laminated timber.

5. A method for producing a fireproof laminate having a base body that is a flat wood or wood-based material and a fireproof layer located on one surface of the base body, comprising: two or more pieces of flame-retardant treated wood are arranged on one surface of the substrate in the planar direction of the one surface via a first adhesive to form the fireproof layer; The first adhesive is then cured to adhere the fire-resistant layer to the substrate.

6. A method for producing a fireproof laminate having a substrate that is plywood, glued laminated timber, or cross-laminated timber, and a fireproof layer located on one side of the substrate, comprising: two or more planks are stacked together via a second adhesive to form a substrate precursor; two or more pieces of flame-retardant treated wood are arranged on one surface of the sawn board via a first adhesive in a planar direction of the sawn board to form the fireproof layer; Next, the second adhesive is cured to turn the substrate precursor into the substrate, and the first adhesive is cured to bond the fire protection layer to the substrate.

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