JPS58147349A - Foamed synthetic resin composite board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foamed synthetic resin composite board, and more particularly to a composite board in which a mesh material is embedded and fixed in a synthetic resin foamed board. The purpose of this is, for example, to be used as a formwork plate during concrete pouring, to have the strength to withstand the lateral pressure of uncured concrete, and to be able to adhere well to concrete and become integrated with concrete without being removed from the mold to construct a heat insulating structure. The purpose is to propose a suitable composite board.

It is known that synthetic resin foam boards such as polystyrene foam boards adhere well to concrete and form an integral part when used as concrete formwork boards.

[7] Due to its low strength, it cannot be used as a formwork board as it is. Some proposals have been made to increase the thickness of the foam board or make it denser, but increasing the thickness will require more effort to install, unnecessarily increase wall thickness, or unnecessarily insulate the board. However, increasing the density increases the weight, leading to a significant increase in cost and lacking in practicality.

This invention was made in view of the above-mentioned circumstances, and its gist is that a mesh face material is embedded in at least one and three surfaces of a synthetic resin foam board, and that this face material is fixed to the foam board. This is a foamed synthetic resin composite board featuring:

The mesh surface material embedded and fixed on the surface of the foam board restrains the surface layer of the foam board in a mesh pattern, and when bending stress is applied to the composite board, it exhibits high anti-compressive force or tensile strength. The bending strength of the composite plate is significantly improved. In general, a foamed board made by simply laminating flat facings exhibits tensile strength and contributes to improving bending strength only when the facing side is on the outside, but the facings of the composite board of this invention are resistant to bending. It can contribute to improving the bending strength either inside or outside. In particular, the surface layer part where the mesh face material is embedded and fixed in the surface layer of the foam board and is restrained in a mesh shape improves the anti-compressive force of the foam board, which is inherently weak, and significantly improves the bending strength with the face material inside. .

Since this composite board has the foam board surface exposed through the mesh of the reticulated facing material, it does not lose both characteristics of the foam board.For example, when using it as a formwork board and pouring concrete, the lateral pressure of the concrete It is possible to construct the 11 concrete heat insulation structure which can withstand the above-mentioned heat and is firmly fixed and integrated with the concrete without peeling or wrinkling.

The synthetic resin foams used in this composite board include extruded polystyrene or bead foam boards, polyethylene, urethane resin, phenol resin, incyanurate resin,
Can be selected from urea resin type, etc. Examples of mesh surface materials include metal art materials such as metal lath, welded wire mesh, woven wire mesh, expanded metal, wire 2s, and hard-shelled wire mesh, synthetic resin mesh surface materials (for example, Takiron's Trical Net, Mitsubishi Yuka's Dianet, Netron manufactured by Tokyo Polymer Co., Ltd.), a wooden mesh surface material (for example, rattan, vine woven material), etc. can be used. Among them, metal lath and expanded metal are suitable because they have a great reinforcing effect and are inexpensive.

The mesh paneling must be indented into the surface of the foam board.

The deeper the digging depth, the better, but generally 0, I Iu
If it is embedded to a depth of 1 or more of the mesh face material thickness (III), the reinforcing effect of the face material can be satisfied. In order to fix the inlaid mesh surface material to the foam board, it is fixed by adhesion with an adhesive, heat welding, or spot welding by attaching a synthetic resin mesh material in a molten state. Simply adhering to the surface of the foam board without embedding the mesh surface material will not work.
The restraint effect of the foam board is poor, and the strength of the face material cannot effectively contribute to improving the bending strength of the composite board, making it impossible to achieve the bending strength of this composite board. In addition, this composite board has a mesh surface material dug and fixed on at least one surface, and a mesh surface material or a surface material with a continuous surface that is not mesh-like is fixed on the other surface. It's okay. Alternatively, the mesh surface material may be fixed and then another surface material may be further laminated and fixed.

Embodiments of the composite plate according to the present invention will be explained with reference to the drawings.

Figure 5 shows a metal lath 2 on one surface of a polystyrene foam board 1.
The metal lath 2 and the foam board 1 are fixed together using an epoxy adhesive. FIG. 6 shows a polystyrene foam board 1 in which metal laths 2, 2 are embedded and fixed on both surfaces. Figure 7 shows a composite board shown in Figure 5 with plywood 3 fixed to the other surface, and Figure 8 shows a composite board shown in Figure 6 with a glass fiber reinforced gypsum slag board 4 fixed to one surface. It is. Any of the composite plates can be used as a formwork during concrete pouring, for example, and can withstand the lateral pressure thereof, and is suitable for constructing an insulating concrete wall that is firmly and integrally connected to the concrete without being removed from the mold.

Examples will be described below.

(Example 1) Polystyrene foam board (Styrofoam IB manufactured by Asahi Dow Co., Ltd.)
Embed a metal lath No. 4 on one surface of the metal lath (type, thickness 25 sheets), apply epoxy adhesive (E-5360 manufactured by Aica Corporation) to the metal lath in advance, fix the metal lath to the foam board, and attach the composite board. Obtained.

When this composite plate is bent with the metal lath embedding direction inside, the relationship between the metal lath embedding depth and the proportional limit load is as follows.
As shown in the diagram. At embedment depths of 0 and 1 ysx, it is 0.81 Q/m or more, which brings about a remarkable reinforcing effect, and as the embedment depth increases, the proportional limit load further increases.

(Example 2) Polystyrene foam board (Styroor Ohm 5F manufactured by Asahi Dow Co., Ltd.)
High-density Flyte 9 ethylene continuous extrusion net (Takiron Co., Ltd. Taki0/Trical Net), N-481) was dug on both surfaces of the IB type (25 m thick), and epoxy adhesive (Aica Co., Ltd., E-5360) was applied to the net in advance. A composite board was obtained by painting the net and fixing it to the foam board.

When this composite plate was bent with the net inside, the relationship between the net embedding depth and the proportional limit load was as shown in Figure 2. 0.8 KP/at mound depth 0.2 vs.
It becomes more than an, brings about a remarkable reinforcing effect, and further increases gradually in approximately proportion to the embedding depth.

(Example 3) Metal lath No. 4 was applied to both surfaces and one surface of a polystyrene foam board (Styrofoam IB type manufactured by Asahi Dow Co., Ltd.) so that the surfaces of the metal lath and the foam board were flush (embedding depth approximately 1 m). The metal lath was embedded in the foam board, and epoxy adhesive was applied to the metal lath in advance, and the metal lath was fixed to the foam board to obtain two composite plates1. Figure 3 shows the relationship between the thickness and bending strength of this composite plate. Figure 4 shows the relationship between In addition, when measuring the bending strength and bending rigidity, the bending load was set with the metal lath wire mesh side facing inside, and the metal lath wire mesh side was bent at right angles to the long diagonal direction (R direction) of the diamond-shaped mesh. (Example 4) Polystyrene foam board (Styrofoam IB manufactured by Asahi Dow Co., Ltd.)
Apply epoxy adhesive to one surface of the
o o Metalgis No. 4 product coated with about 17g of epoxy adhesive and a glass fiber-reinforced gypsum slag board (Panpan manufactured by Asahi Glass Co., Ltd., thickness 6iu) with 30097rd coat of epoxy adhesive applied on the other surface were stacked and heated at room temperature. Pressure-bond and embed metal lath flush on one surface of the foam board (digging depth approx. 1
m) A composite board was obtained in which a gypsum slag board was fixed and laminated on the other surface.

The physical properties of this composite plate were as shown in the table below.

The bending strength in Examples 1, 2, and 3.4 was determined using a mesh panel as the inner side of the bend, a span interval of 25.4 cIIL, and a test specimen length of 30 cr according to ASTM-0203.
rL, width 15 cm, and was measured by single-line bending at a bending speed of 10 u/min. Further, the proportional limit load is the load at the proportional limit in this measurement.

[Brief explanation of drawings]

Figures 1 and 2 are correlation graphs between the embedment depth of the face material and the proportional limit load, showing the results of Examples 1 and 2, respectively. Figures 3 and 4 are graphs of the correlation between the core material thickness and the proportional limit load, showing the results of Example 3. Correlation graph showing the relationship between maximum bending load and bending rigidity, Nos. 5.6 and 7
．． 8 are sectional views of the composite plate according to the present invention. l...Polystyrene foam board 2...Metal 2S 3...Plywood 4...Glass fiber reinforced gypsum slag board Figure 2 Figure 1 Drawing material embedded J depth (...) Figure 3 O: Aya lambda surface I4 Ruff Composite board core material thickness (#J, 1 Figure 4 O: Both sides A horn composite plate core material thickness tab (M) Figure 5 Figure 6 Figure 7 Figure 81 (1)

Claims (1)

[Claims] (1) A foamed synthetic resin composite board, characterized in that a mesh face material is embedded in at least one surface of the synthetic resin foam board, and this face material is fixed to the foam board.