JP2928444B2 - Insulation method for building using polystyrene resin foam board insulation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for thermally insulating a building using a polystyrene resin foam plate thermal insulation.

[0002]

2. Description of the Related Art Hitherto, polystyrene foam boards have been widely used as heat insulators because of their low thermal conductivity, light weight and required mechanical strength. However, since a polystyrene resin foam board is usually low in resistance to bending, when the foam board is attached along a curved wall surface like a cylindrical tank, the foam board cracks and sometimes breaks. In order to avoid this, it is conceivable to laminate a plurality of layers using a heat insulating material having a small thickness, but the process becomes complicated and lacks practicality.

As another solution, a polystyrene resin foam plate is cut into a shape along a curved surface, a large number of notches are cut in the inner surface of the heat insulating plate so that a curvature can be easily obtained, and a curvature is obtained. From the beginning, foam molding is performed, but it is troublesome to process, it is difficult to obtain a large number of uniform heat insulation properties, or it can be used for surfaces with different curvatures There are inconveniences such as not being applicable.

[0004] As a means for solving the above-mentioned inconvenience, a surface material having flexibility on one surface of a polystyrene-based resin foam plate is provided so that the elongation of the surface layer portion of the foam plate is restrained below the breaking elongation. Laminated and integrated, the obtained laminate is pressed and bent so that the surface material side forms an outer curved surface, and is attached to the curved surface of the construct having the curved surface, and the heat insulating construction method of a structure in which the curved laminated body is fixed to the surface of the structure. It has been proposed (see JP-A-59-12836).

[0005] The above-mentioned proposal is to restrain the elongation of the outer curved surface layer portion of the foam board by the surface covering material, to keep the elongation of the foam board below the breaking elongation, and to increase the compression ratio of the inner curved surface layer portion. The purpose is to conform to the curved surface to be constructed without causing cracks or breakage on the outer curved surface layer portion of the laminate. And, as the surface covering material, such as a thin metal plate such as iron or aluminum, or a plastic reinforcing sheet using glass fiber or metal mesh as a reinforcing material, etc., the tensile stress of the outer surface layer portion generated when the foamed plate alone is bent. Those having the above tensile strength are used.

[0006]

According to the above proposal, a flat polystyrene resin foam plate molded by a usual molding method can be used as it is and fixed as a heat insulating material to the surface of a curved building. There is no need for special processing on the polystyrene resin foam board, and the same can be used at different curvatures, so it is understood that this is an effective heat insulation construction method. However, since a heavy and hard material such as a thin metal plate or a plastic reinforcing sheet is used as the surface material, the product itself must be heavy, and handling during transport or construction is not easy. In addition, in addition to the force required to bend the polystyrene resin foam plate to bend, a force required to bend a thin metal plate or a plastic reinforcing sheet as a surface mounting material is required, and a large force is required. In addition, it may be necessary to partially cut, drill, or cut out the polystyrene resin foam plate during insulation work.However, use a normal cutter knife or saw to remove the metal plate or plastic reinforcing sheet that is the surface material. It cannot be cut or cut, and such processing is not easy. Depending on the material used as the facing material, it may be difficult to maintain the posture after bending, and corrosion may occur after heat insulation.

[0007]

Means for Solving the Problems The inventors of the present invention have studied the bending of a polystyrene resin foam plate while paying attention to the problems of the previously proposed heat insulation construction method using a polystyrene resin foam plate. Many researches and experiments on the method of improving the characteristics were continued. In the process, as in the past, as a surface covering material for restraining the elongation of the surface layer of the polystyrene resin foam board, a metal reinforcing sheet made of a thin metal sheet such as iron or aluminum, or glass fiber or a metal mesh as a reinforcing material. Even without using a heavy and hard thing such as, when the nonwoven fabric is simply adhered to the surface using an adhesive in a normal manner, and the adhered surface is curved so as to be an outer curved surface Have found the surprising fact that a rigid synthetic resin plate can be greatly curved without any cracks on its curved surface. Furthermore, when the load is released after the required load has been bent and the load is released, the curved hard synthetic resin plate is not completely returned to the original flat plate shape, but is kept in a state where it remains considerably curved, and He also found that his attitude was maintained for a long time.

The present invention is intended to effectively utilize the above findings as a method of performing heat insulation on a structure, and has a thickness of 10 to 100 mm, a density of 1 to 100 mm and a nonwoven fabric adhered to one surface.
A 5 to 75 kg / m ³ polystyrene resin foam plate is curved along the curved surface of a construct having a curved surface, with the nonwoven fabric side being an outer curved surface, and fixed along the curved surface of the construct. Disclosed is a method for performing thermal insulation on a building using a polystyrene-based resin foam plate thermal insulator.

[0009] In the present invention, the heat insulating material of a foamed polystyrene resin board is a foamed board formed by foaming a polystyrene resin by an appropriate foaming method such as extrusion foaming molding or in-mold foaming molding as a heat insulating material. The shape is preferably a flat plate shape, but is not limited thereto.

As described above, this type of polystyrene resin foam plate has extremely low elongation and low resistance to bending.
Cracks run on the stretched surface with very little bending and break immediately upon further bending. In the present invention, by adhering the nonwoven fabric to the surface of the foamed polystyrene resin plate, the occurrence of cracks on the surface of the foamed polystyrene resin plate is greatly suppressed, and the surface of the foamed polystyrene resin plate can be greatly curved.

According to the experiments of the present inventors, the nonwoven fabric used is a short fiber of rayon, cotton, polyester, polypropylene, nylon or the like or a blend thereof, or a long fiber of polypropylene, polyester, nylon or the like or a blend thereof, or Glass fiber, SUS
A sheet or the like obtained by arranging fibers or the like in a web or mat shape by an ordinary method and bonding fibers together using an adhesive as necessary may be used. Has a breaking elongation of at least 2 in the bending direction.
0% or more, tensile strength 2 kg / 5 cm (JIS L-10
96: cut-slip method) or more, and more preferably, a tensile strength of 4 kg /
Those having a range of 5 cm or more are suitable.

It is also possible to use a directional nonwoven fabric,
According to the experiments of the present inventors, in such a case, it is possible to obtain a product that can be bent more greatly by sticking the fibers so that the direction of the fibers matches the direction of the bending. The adhesive strength between the polystyrene resin foam plate and the nonwoven fabric needs to be strong enough to follow the elongation when bent. According to the experiments of the present inventors, as an adhesive capable of obtaining this adhesive strength, a hot-melt adhesive represented by an ethylene-vinyl acetate copolymer, a two-part epoxy resin type, a one-part urethane type Reaction-curable adhesives, such as
Vinyl acetate type, emulsion type represented by urethane type, two-component polyester type, solvent type represented by urethane type, etc. may be used. It is effective to use a hot roll to press and bond an adhesive-coated material such as an extrusion method or a roll coater method to a polystyrene resin foam board. For example, a method in which the material applied to one or the other is press-bonded is effective.

The amount of coating is not particularly limited, but if it is too small, there is a risk of peeling between the foamed polystyrene resin sheet and the nonwoven fabric, and if it is too thick, the elongation of the nonwoven fabric may be restricted. ~60g / m ² (dry)
The degree is appropriate. The nonwoven fabric may be stuck on one side or stuck on both sides. In the case of sticking on both sides, it is possible to construct one heat insulating plate by bending it into an S-shape, and at the same time, the non-woven fabric attached to the inner side surface at the time of bending has a good adhesion to the building and Improves adhesion. Further, since the nonwoven fabric has a good moisture absorption property, it can function as an absorbent for dew condensation on the tank surface when constructed as a heat insulating wall such as a liquefied gas tank.

In producing the heat insulating material of the polystyrene resin foam plate used in the present invention, a plate-like polystyrene resin foam plate is formed by the usual means as described above, and the desired shape is formed by using a normal laminator or the like. Adhere the nonwoven fabric on one or both sides. The construction of the polystyrene resin foam board heat insulating material according to the present invention on a building is performed as follows.

The polystyrene-based resin foam plate heat-insulating material is previously subjected to a bending process so that the surface on which the nonwoven fabric is adhered has the same curved surface as the curved surface of the structure, so that the curved surface portion of the structure is curved. Attach to. After installation, tighten with a band if necessary. In this construction method, the bending may be performed in a heated state, and as described above, the polystyrene-based resin foam plate heat-insulating material according to the present invention maintains a predetermined curvature when a load is released after being largely bent. Since it is held for a long time, it is also possible to perform such bending while taking into account the curvature of the structure.

In a state where a flat polystyrene-based resin foam plate heat insulating material is in contact with the curved surface of the building, the both side portions are pressed, and the whole is made to conform to the curved surface of the building. . According to this method, it is possible to freely use a polystyrene resin foam plate heat insulating material of the same mode for different structures having different curvatures.

[0017]

[Operation] As described above, the heat insulating material of the polystyrene resin foam plate used in the present invention does not cause breakage of the polystyrene resin foam plate even when it is greatly curved. Although the reason is not necessarily clear, the tensile stress of the foam layer surface layer portion, which is generated when curved by the nonwoven fabric adhered to the surface of the polystyrene resin foam plate, is maintained so as to be equal to or less than the breaking strength, and as a result, the elongation is reduced. It is understood that the occurrence of cracks caused by the cracks was prevented.

Accordingly, in the heat insulating construction method according to the present invention, the heat insulating material can be bent with substantially the same load as the load required for bending the polystyrene resin foam plate, and has a shape retaining property. Therefore, the construction work is extremely easy as compared with the case where a metal plate or the like is adhered to the surface.

[0019]

Example: Extruded expanded polystyrene plate having a density of 27 kg / m ³ (Eslenfoam SG (manufactured by Sekisui Plastics), thickness 2)
5mm, 50mm, 100mm), density 15kg / m
Insulating polystyrene foam insulation plate (bead method ³ ) (Eslenboard JIS No.1 product ((Sekisui Plastics), thickness 2)
5 mm, density 30 kg / m ³ in-mold molded styrene-ethylene copolymer foam board (Biocelan S (manufactured by Sekisui Plastics), thickness 25 mm), and density 40 kg / m 3
^From a rigid polyurethane foam material (Sofran-R (manufactured by Sekisui Plastics), thickness 25 mm), a width of 100 mm and a length of 5
Each test piece of 00 mm was prepared.

The test pieces were divided into a plurality of groups, and a foam sheet alone and a nonwoven fabric A (# 2030NW manufactured by Venus Seisaku Co., Ltd.) having the properties shown in Table 1 as a surface material were adhered to one side and both sides. , And nonwoven fabric B (Spunbond P03070 manufactured by Asahi Kasei Corporation) were adhered on one side to prepare a nonwoven fabric B. On the other hand, as another comparative example of the surface material, a test piece was prepared by adhering a 0.3 mm-thick color galvanized iron plate, a 0.4 mm color aluminum plate, and a 0.25 mm copper plate to one surface of a test piece.

The adhesive used in each case was an ethylene-vinyl acetate hot melt adhesive (Hirodine # 7).
573, manufactured by Hirodyne Co., Ltd.) and about 30 g / m ²
And applied pressure bonding with a hot roll.

[0022]

[Table 1]

The test pieces of each group were placed on a support (distance between fulcrums: 300 mm) with predetermined deflection amounts (target values) of 30 mm and 50 mm, and a load speed of 500 mm was set at the center of the distance between the fulcrums. A load was applied at / min, and the maximum load and the amount of deflection at that time were measured. Note that the maximum load is the load at the break or the target value (the force required to bend the bay), and the amount of deflection is the value of the maximum amount of deflection at that time (excluding the broken one) (JIS A).
−9511).

Note that an extruded polystyrene plate (thickness: 25)
mm), for the test piece having nonwoven fabric A adhered to only one surface, the experiment was conducted separately for the case where nonwoven fabric A became a curved outer surface (outer) and the case where nonwoven fabric A became a curved inner surface (inner). In addition, a test was performed on the non-woven fabric A attached to both sides. The results are shown in column A of Table 2.

Further, in order to examine the remaining amount of plastic deformation after bending (the ability to remove the load after bending and maintain the deformation), as shown in FIG. A jig having a cylinder B was prepared, and each test piece P was pressed along the curved surface of the cylinder B of the jig for about 20 seconds to be curved. After removing the load, about one hour later, the maximum distance H between the chord L connecting both ends of the inner arc length of 300 mm and the arc was measured by the method shown in FIG. 2, and the value was defined as the remaining amount of plastic deformation. The results are shown in column B of Table 2.

[0026]

[Table 2]

[Discussion] As is clear from Table 2, when any of the foamed sheets was used alone (ie, when there was no covering material), it broke before the bending amount reached 50 mm. And / or in the case where the adhesive is applied to both sides, in almost all cases, even if it is bent to the target value of bending, no break occurs, indicating that the polystyrene resin foam plate heat insulating material according to the present invention can have desired bending characteristics. ing. In the case of the nonwoven fabric A, when the thickness of the test piece was increased, a part of the test piece was broken. This is considered to be because the tensile strength and the elongation at break of the nonwoven fabric A were smaller than those of the nonwoven fabric B. You.

In addition, although the test piece using an iron plate, an aluminum plate, or a copper plate as a surface material did not break even when bent to the target value of bending, it did not break as compared with the test piece to which a nonwoven fabric was adhered at the time of bending. All require a large load, and the superiority of the polystyrene resin foam plate heat insulating material according to the present invention has been proved. The residual amount of plastic deformation after removing the load is also larger than that of the test piece using iron plate, aluminum plate, or copper plate as the surface material, and the residual plastic deformation of the test piece with the nonwoven fabric attached is larger than that of the test piece using the steel sheet. The superiority of the polystyrene resin foam board insulation according to the present invention has been proved.

[0029]

The heat insulating material of the polystyrene resin foam plate used in the present invention has a simple structure in which a nonwoven fabric is simply attached to the surface of the polystyrene resin foam plate,
It can be largely bent without breaking, and can be effectively used as a heat insulating material for a curved wall surface. Further, the shape retention after bending is also good, and it is light and does not require a force higher than that required for bending the polystyrene resin foam plate even during bending. Therefore, heat insulation construction for the building is facilitated. Furthermore, since the surface covering material is a nonwoven fabric, cutting and opening with a cutter knife, saw or the like are easy, and the assembling work to the building can be performed more reliably. In particular, in the case where the nonwoven fabric is stuck on both sides, the whole can be curved in an S-shape, and more construction modes can be taken with the structure.

[0030] Even after the heat insulation, since the non-woven fabric is used as the surface material, it does not corrode, causes less dew condensation, and has a good discharge of adsorbed water. In manufacturing, the nonwoven fabric is light, thin, and a roll-shaped raw material, so that the nonwoven fabric can be easily bonded to a polystyrene-based resin foam plate, and productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a jig used in an experiment.

FIG. 2 is a diagram showing a state of measuring a residual amount of plastic deformation.

[Explanation of symbols]

A: Base, B: Cylinder, C: Test piece, L: String, H: Residual plastic deformation

Claims (1)

(57) [Claims] 1. A non-woven fabric having a thickness of 10 to which a non-woven fabric is adhered on one side.
Polystyrene with a density of 15 to 75 kg / m ³ 100 mm
A polystyrene foam , wherein the nonwoven fabric side of the foamed resin foam plate is curved outward along the curved surface of the construction having a curved surface, and the polystyrene is fixed along the curved surface of the construction. constructs using system resin foam plate heat insulating material
Thermal insulation construction method to.