JPH047703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a method for manufacturing a heat insulating panel in which a synthetic resin foam layer is provided with an inorganic particle layer interposed between a front surface material and a back surface material.

(Description of Prior Art) Insulating panels made of synthetic resin foams such as hard polyurethane foam, phenol foam, and isocyanurate foam with front and back materials attached are used as wall materials for the purpose of saving cooling and heating costs. It is widely used as In recent years, attempts have been made to disperse inorganic particles such as perlite, hollow beads, or shirasu balloons into the synthetic resin foam in order to further improve heat insulation and flame retardancy. However, it is difficult to uniformly disperse the inorganic particles in a synthetic resin foam;
It was not possible to obtain the desired hardening. Therefore, recently, as shown in the perspective view of FIG.
A heat insulating panel 10 has been proposed in which a synthetic resin foam layer 14 is formed in a space sandwiched between the inorganic particle layers 13, 13. This heat insulating panel 10 is intended to eliminate or alleviate the influence of heat from the outside by using inorganic particle layers 13, 13. However, according to the conventional manufacturing method, it was not possible to arrange inorganic particles in a layered manner on each opposing surface of the front material 11 and the back material 12, and the desired effect could not be obtained. FIG. 2 is a schematic diagram illustrating a conventional manufacturing method of the heat insulating panel 10. According to this manufacturing method, the insulation panel 10
In this method, the adhesive 15 is discharged or applied to each opposing surface of the front material 11 and the back material 12, which are continuously supplied by a double conveyor or the like, and then the inorganic particles 13a are discharged in a layer on the adhesive surface. Discharging the synthetic resin foam raw material 14a onto the inorganic particle layer,
The synthetic resin foam raw material 14a is foamed and hardened between the opposing inorganic particle layers to form a synthetic resin foam layer 14, and at the same time, the self-adhesive property of the synthetic resin foam raw material 14a during foaming and hardening allows the surface material 11 and the back surface The material 12, the inorganic particles 13a, and the synthetic resin foam layer 14 are integrated, and then cut into desired dimensions. However, when the synthetic resin foam raw material 14a is foamed and cured, the inorganic particles 13a discharged in a layer on the adhesive surface are disarranged due to the foaming pressure and the flow of the raw material during foaming, and thus the inorganic particles 13a are It was not possible to obtain a product arranged in layers.

(Object of the Invention) The present invention has been made in view of the above points, and provides a heat insulating panel in which a synthetic resin foam layer can be provided by interposing an undisturbed inorganic particle layer between a front surface material and a back surface material. Provides a manufacturing method.

(Structure of the Invention) The present invention is capable of forming an undisturbed inorganic particle layer in the production of a heat insulating panel in which a synthetic resin foam layer is provided with an inorganic particle layer interposed between a front surface material and a back surface material. The gist is that adhesive is applied to each facing surface of the surface material, and when the adhesive is not completely cured, inorganic particles are attached to the surface of the adhesive, and the adhesive is applied or impregnated in advance. covering the inorganic particles with a sheet-like material, then discharging a synthetic resin foam raw material onto at least one of the opposing surfaces of the sheet-like material, and foaming and hardening the synthetic resin foam raw material between the sheet-like materials. It is in. The present invention will be specifically explained below with reference to the accompanying drawings.

FIG. 3 is a perspective view of a heat insulating panel 20 obtained by implementing the present invention. This insulation panel 20 is
Inorganic particles 23, 23 are provided on each opposing surface of the front material 21 and the back material 22 using an adhesive, and each opposing surface of the inorganic particle layers 23, 23 is coated with or impregnated with an adhesive, a sheet-like material 25, 25 are laminated, and a synthetic resin foam layer 24 is placed between the sheet-like materials 25, 25.
It consists of a configuration with The surface material 21 and the surface material 22 are metal plates, metal foils, plaster plates, calcium silicate plates, asbestos paper, synthetic resin films, and laminates of two or more of these, and the adhesive is rubber. Synthetic adhesives such as epoxy, epoxy, and urethane are mainly used, and as the inorganic particles, pearlite, shirasu balloon, vermiculite, etc. with a particle size of about 1 to 20 mm are used. The sheet material 25 coated with or impregnated with an adhesive is made of a cloth made of glass fiber or nylon, or a net-like body such as wire mesh coated with or impregnated with the adhesive, and the synthetic resin foam layer is made of a hard material. It is made of polyurethane foam or polyisocyanurate foam.

FIG. 4 is a diagram illustrating an example of manufacturing the heat insulating panel 20. 21 is a surface material, and 22 is a back material, which are continuously supplied, and after the adhesive 26 is applied to each opposing surface, inorganic particles 23a are sprayed onto the adhesive surface at a point when the adhesive is not completely cured. It will be done. 25a is mainly a sheet-like material made of cloth such as glass fiber or a net-like material such as wire mesh, which is continuously supplied, and an adhesive 26 is applied to at least the surface facing the surface material 21 or the back surface material 22 to form the sheet-like material. 25 is formed. This sheet-like material 25 is pressed against the inorganic particles 23a sprayed onto the surface material 22 by a pressing roller 27 so as to cover the inorganic particles 23a. After that, the interval between the sheet-like materials 25 is set to a desired distance, and then the sheet-like material 25 placed on the surface material 21 side is
A synthetic resin foam raw material 24a such as hard polyurethane foam or polyisocyanurate foam is discharged onto the surface. Thereafter, the synthetic resin foam raw material 24a is foamed and hardened to form the sheet-like materials 25, 25.
A foam layer 24 is formed in between. At this time, the inorganic particles 23a, which have been fixed in position as the adhesive hardens, are affected by the foaming pressure of the synthetic resin foam raw material 24a and the flow of the raw material during foaming. However, since this is an effect via the sheet-like material 25, the arrangement is not disturbed and the layered structure is fixed. Furthermore, at this time, the synthetic resin foam layer 24 and the sheet-like material 2
5 and 25 are adhered by the self-adhesive force of the synthetic resin foam raw material 24a during foaming, and are a surface material 21, a back material 22, inorganic particle layers 23, 23, and a sheet material 2.
5, 25 and the synthetic resin foam layer 24 are integrated. Incidentally, if the sheet-like material 25 is formed of a coarse mesh material, a part of the synthetic resin foam raw material 24a passes through the sheet-like material 25 and forms the inorganic particles 23.
It foams and hardens when it is entangled with a,
The adhesive strength described above becomes even greater. Thereafter, the integrally molded product is cut into desired dimensions to produce a product.

The above manufacturing conditions, such as the supply speed of the surface material 21, molding temperature, etc., may be determined as appropriate depending on the type and thickness of the synthetic resin foam layer, the material and thickness of the surface material and back surface material, the type of inorganic particles, and others. It is necessary to do so, and it is not possible to decide on just one thing.

In addition, although the above explanation has only shown the case of continuous manufacturing, depending on the product, size, etc., a surface material etc. may be set in the cavity of a mold, and a synthetic resin foam raw material may be injected into the cavity. In some cases, it may be preferable to manufacture by foam-curing means.

(Effects of the Invention) As described above, according to the present invention, a synthetic resin foam layer can be provided with an undisturbed inorganic particle layer interposed between the surface material and the back material, and it has excellent heat resistance and flame retardancy. Insulated panels can be manufactured. Furthermore, the obtained heat insulating panel has excellent strength because a sheet-like material is interposed between the inorganic particle layer and the synthetic resin foam layer.

As described above, the present invention can produce a heat insulating panel with excellent heat resistance, flame retardance, and strength, and is industrially useful.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional heat insulating panel, Fig. 2 is a schematic diagram showing a conventional manufacturing method, Fig. 3 is a perspective view of a heat insulating panel obtained by implementing the present invention, and Fig. 4 is a perspective view of a heat insulating panel obtained by implementing the present invention. It is a schematic diagram showing a manufacturing method. 21... Surface material, 22... Back material, 23a...
Inorganic particles, 23... Inorganic particle layer, 24a...
Synthetic resin foam raw material, 24...Synthetic resin foam layer,
25...sheet-like material, 26...adhesive.

Claims (1)

[Claims] 1. In the production of a heat insulating panel in which a synthetic resin foam layer is provided with an inorganic particle layer interposed between the front material and the back material, an adhesive is applied to each opposing surface of the front material and the back material, and the adhesive is At the point when the adhesive is not completely cured, inorganic particles are attached to the surface of the adhesive, the inorganic particles are covered with a sheet-like material coated or impregnated with adhesive in advance, and then at least one of the opposing surfaces of the sheet-like material is coated with the adhesive. A method for producing a heat insulating panel, which comprises discharging a synthetic resin foam raw material and foaming and hardening the synthetic resin foam raw material between the sheet-like objects.