JP2022041783A - Flexible synthetic resin foam board and method for producing the same - Google Patents

Abstract

To provide a flexible synthetic resin foam board as, when applying a synthetic resin insulation board as insulation material for a cylinder type curved-surface tank, a finely cut formed article is used and a flexible board-shaped insulation board that follows the curved-surface is required.SOLUTION: By making a composite panel having a configuration in which a composite film of a film such as polyester terephthalate and a biaxially stretched polystyrene film or the like is heat-fused on one surface of a synthetic resin insulation board, and applying pressure from the film surface using the binding force of the film and crush the cells of the non-binding surface side, thereby flexibility is imparted to the synthetic resin insulation board. By this, a flexible synthetic resin insulation board that flexibly follows the curved surface can be produced.SELECTED DRAWING: Figure 2

Description

The present invention relates to a manufacturing method for flexibly processing a heat insulating panel in which a film is heat-sealed and integrated on one side of a synthetic resin foam plate.

Since the conventional synthetic resin foam plate does not have the flexibility to follow the aspect in the heat insulation construction such as a cylindrical tank, in the conventional technology, the plate-shaped heat insulating material is cut into several pieces and processed and molded in order to match the curved surface. It was necessary to place multiple molded heat insulating materials adjacent to each other and fix them while blending them into the curved surface.

Alternatively, the curved surface had to be covered by combining a plurality of members that had been machined on the curved surface.

As for the usage mode, in the method of cutting and molding a plate-shaped heat insulating material into several pieces and winding them, a large number of joints and voids are generated, which causes a decrease in heat insulating performance.

In addition, when making curved surface cutting products, a lot of raw material loss occurs in the raw material.

Japanese Patent Application Laid-Open No. 58-565874

In the above-mentioned conventional construction method, a large number of seams of expanded styrofoam plates of a plurality of molded heat insulating materials are generated, and heat loss from the gaps becomes large. In addition, it took time and effort to temporarily fix the cut plate material, which hindered the installation work.

The joints of the plate material become thermal bridges, and water vapor permeates, and dew condensation is likely to occur in low-temperature tanks. In addition to the problem of heat loss during long-term use, problems such as the progress of corrosion due to dew condensation water also occur.

Since the conventional construction method cannot sufficiently effectively improve the heat insulating performance, there is also a problem that the thickness of the foam must be increased in order to improve the heat insulating property.

In addition, since the surface of the synthetic resin heat insulating plate has low local compressive strength and bending strength, it is easy for workers to cause depression or cracking when attaching the foam, and the thickness is reduced due to the occurrence of defects or dents. There is a problem that the heat insulation defect in the water causes a decrease in heat insulation.

Furthermore, since the local compressive strength is small, it was necessary to use an expensive metal band such as a wide stainless steel belt to fix it.

The present invention is intended to solve the problem of the material having such a conventional structure, in which a film is laminated on one side and a heat insulating panel is compressed and bent from the film surface side to compress an inner cell. Make it more flexible.

At the time of this compression, the laminated film can restrain the heat insulating material on the film surface side and compress the cells of the heat insulating material on the unrestrained side. During this compression, the synthetic resin heat insulating plate is easily cracked at the limit of bending strength if the film is not constrained.

Even for heat insulating materials that have the drawback of high water supply performance, such as bead-molded styrene heat insulating plates and phenol foam or urethane foam, by attaching a film to one side with a thermal laminate, the weak point of water absorption is improved and strengthened. ..

According to the claim 1, in order to solve the problem of softening various synthetic resin foam plates, the present invention enhances the compressive strength and bending strength by laminating a film on one side thereof with a thermal laminate. The film surface is constrained by the film, and the foam is curved on the non-constraining surface side by the pressure of three rolls or the like to crush the cells on the non-constraining surface side to give flexibility and flexibly respond to the situation.

According to the present invention, a product in which a heat insulating panel integrated with a film and a synthetic resin heat insulating plate by thermal laminating is flexibly processed in a compression process can flexibly follow the curved surface of the tank regardless of the size of the cylindrical tank. , Workability is greatly improved.

Compared to the method of pasting multiple molded plates, the number of seams is very small, and reducing the number of thermal bridges dramatically reduces the damage caused by dew condensation and improves the heat insulation performance.

Since it is a heat insulating panel integrated with the film, the film on the surface increases the waterproof performance and moisture permeation resistance, prevents the penetration of water and water vapor from the outside, and makes the waterproof and moisture proof treatment extremely easy. This further contributes to the maintenance of heat insulation performance.

In the heat insulating material driving method for the roof, many cut materials are attached to the formwork, but by attaching the product from which the surface film of this product, which has been softened, has been removed to the formwork. , It is possible to easily reduce the process by constructing along the curved surface.

As shown in FIGS. 1 and 2, the heat insulating panel according to the embodiment of the present invention is obtained by attaching a film 2 to one side of a synthetic resin heat insulating plate 1 by heat laminating.

Insulation panel perspective view of the present invention Direction and sectional view for compressing the heat insulating panel of the present invention

The foaming ratio of the synthetic resin foam plate is not limited, but is preferably in the range of 30 to 70 times. The thickness of the synthetic resin foam plate affects the element of compressive strength during bending compression processing, so it is appropriately selected according to the purpose of use, but under normal use conditions, heat insulation performance is required to be about 20 to 50 mm. Therefore, it is often set within the range of 25 to 50 mm.

The film is firstly polyester terephthalate, but in addition, a biaxially stretched polystyrene film or a non-stretched polypropylene film serving as a heat-sealing layer is laminated on the back surface of a synthetic resin film such as polypropylene, polystyrene, polyethylene or polyester2. A layered structure can be mentioned.

Among these first and second films, a multi-layer film with a synthetic resin film such as polyester terephthalate or polyester sheet having high tensile strength and tensile elasticity coefficient, excellent bending strength and toughness is particularly preferable.

The thickness of the first and second films is about 5 to 80 μm, preferably 10 to 50 μm, and the synthetic resin film such as polyester terephthalate or polyester used for the surface has no 10 to 50 μm foam side. The stretched polypropylene film is in the range of 5 to 25μ.

The foam and the film are laminated by thermal lamination with a thermal roll, and the temperature of the thermal roll is in the range of 120 to 200 ° C., preferably in the range of 130 to 160 ° C.

When placing concrete or finishing the waterproof layer, the joints on the upper surface side should be lined with moisture-proof waterproof tape.

Claims (1)

A film-laminated heat-insulating panel, in which a film is heat-fused and integrated on one side of a plate-shaped heat insulating material made of synthetic resin foam, is made flexible by applying pressure from the surface on which the film is laminated to follow a curved surface. A product characterized by being.

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