JPH02209230A - Insect-resistant heat insulating board - Google Patents

Abstract

PURPOSE:To keep perfect insect-resistant effect for a long period of time by coating the surface of the foamed resin constituting a heat insulating board with a microencapsulated insecticide. CONSTITUTION:As the synthetic resin foam used as a heat insulating material 1, thermosetting resin foam such as polyurethane foam, phenol resin foam, urea resin foam or melamine resin foam is pref. used and, as a surface material 2, any one of surface materials used as the surface material of a known laminated heat insulating panel such as a metal plate such as a steel plate, a zinc plated steel plate or an aluminum plate, a metal foil such as an aluminum foil, a synthetic resin plate, a glass fiber reinforced synthetic resin plate, a synthetic resin film, paper or fire-retardant cardboard can be used. In order to form a film containing a microencapsulated insecticide to the end surface of the heat insulating material, for example, an aqueous microcapsule suspension is mixed with paint based on an aqueous acrylic emulsion or an aqueous vinyl acetate emulsion before coating.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat insulation board for building materials that prevents insect damage, and particularly to an insect-proof heat insulation board used as a heat insulator for livestock barns and the like.

[Conventional technology]

A heat insulating board is made by laminating a surface material made of paper or synthetic resin on both sides of a hard urethane foam board.

If the urethane foam is exposed on the edges of these insulation boards, when the insulation boards are used as insulation for livestock or poultry houses, pests such as the larvae of the snail beetle can invade through the edges. There is a problem in that the heat insulating material made of foamed resin is eaten away and propagated in large quantities, and the inside of the heat insulating material becomes almost hollow, resulting in a decrease in heat insulation properties.

To prevent this, methods include attaching adhesive tape made of aluminum foil or the like to the end surfaces, placing a covering material on the end surfaces of the insulation boards and foaming them together when manufacturing the insulation boards, and applying synthetic resin paint to the end surfaces. Attempts have been made to paint or cover such materials.

[Problem that the invention seeks to solve]

Among the conventional methods for preventing insect damage to insulation boards, the method of pasting adhesive tape to the edges of insulation boards is not durable, and the adhesive strength of the adhesive tape decreases and peels off after long periods of use. There is a drawback that it does.

When manufacturing insulation boards, the method of placing a covering material on the end face and foaming them together has the drawbacks of a complicated process and increased production costs.Furthermore, simply coating the end face of the insulation board with paint does not have an insect repellent effect. Not perfect.

Therefore, an object of the present invention is to provide a heat insulating board that can completely prevent feeding damage caused by pests and maintain its insect repellent effect for a long period of time.

[Means for solving interjugular points]

In order to achieve the above object, the inventors of the present invention have conducted intensive research and found that a complete insect repellent effect can be achieved by dispersing microencapsulated insecticides inside the foamed resin that makes up the insulation board or by applying it to the foamed resin surface. They discovered that the scales can be maintained for a long period of time, and completed the present invention.

That is, the present invention provides an insulating board made of a synthetic resin foam, in which a microencapsulated insecticide is dispersed inside the synthetic resin foam, or a coating film containing a microencapsulated insecticide is coated on the surface of the synthetic resin foam. The gist of the present invention is an insect-proof and heat-insulating board characterized by forming the following.

Next, the content of the present invention will be explained in detail with reference to the drawings.

FIGS. 1 and 2 are cross-sectional views of an example of the insect-proof insulation board of the present invention. (1) is a plate-shaped heat insulating material made of synthetic resin foam such as polyurethane resin, and (2) is a sheet-like surface material made of metal, synthetic resin, or paper covering both sides of the heat insulating material.

As the synthetic resin foam used as the heat insulating material (1), thermosetting resin foams such as polyurethane foam, phenol resin foam, urea resin foam, melamine resin foam are preferably used, and rigid synthetic resin foams are particularly preferably used. It will be done. Polystyrene foam, polyethylene foam and other thermoplastic synthetic resin foams can also be used.

There is no particular limit to the thickness of the synthetic resin foam, but it is between 10 and 1
A thickness of 0.00 mm is commonly used.

The surface material (2) may cover both sides of the heat insulating material (1), or may cover only one side. Further, depending on the case, the surface material (2) may be omitted.

In the heat insulation board of the present invention, the surface material (2) includes:
Metal plates such as steel plates, galvanized steel plates, and aluminum plates, metal foils such as aluminum foil, synthetic resin plates, glass fiber-reinforced synthetic resin plates, synthetic resin films, paper, flame-retardant paperboard, and other known surface materials for laminated insulation boards. Any of the surface materials used as such can be used, and sheet materials made by laminating these materials can also be used. The surface material may not only be planar, but may also have a wavy cross section.

Microcapsules containing an insecticide are dispersed inside the heat insulating material (1), or a coating film (4) containing microcapsules containing the pesticide is formed on the end surface (3) of the heat insulating material (1).

All kinds of known insecticides can be used as the insecticide to be encapsulated in the microcapsules, but it is preferable to use one that has relatively low toxicity to the human body or mammals, such as diazinon.

The material of the microcapsule film is not particularly limited, and may include polyamide resin, polyethylene sulfonic acid resin, copolymer of vinyl compound and phthalic anhydride, water-soluble proteins such as gelatin, casein, and albumin, gum arabic, agar, sodium alginate, and cellulose. Known microcapsule coatings such as carbohydrates such as derivatives can be used. Microcapsules encapsulating insecticides are manufactured by known methods depending on the type of these films.

There is no particular restriction on the particle size of the microcapsules, and those from several microns to several hundred microns can be used, and in consideration of ease of production and handling, for example, those from 5 to 30 microns are used.

When microcapsules are dispersed inside a heat insulating material (1) made of polyurethane resin foam, etc., an aqueous microcapsule suspension is added to polyisocyanate and polyol, which are raw materials for polyurethane, when foam-molding the foam. The heat insulating material (1) and the surface material (2) can be integrally molded by adding and uniformly mixing and foaming between the surface materials (2).

Although there is no particular restriction on the amount of microcapsules added in this case, the microcapsules can be added in an amount of 0.1 to 10% by weight, preferably 0.2 to 1% by weight, based on the foam.

When forming a coating film containing a microencapsulated insecticide on the end face (3) of the heat insulating material (1), for example, water-based microcapsules are suspended in a paint whose main component is an aqueous acrylic emulsion, an aqueous vinyl acetate emulsion, etc. Liquids can be mixed and applied.

If the insulation board is made by laminating the surface material (2) on both sides of the insulation material (1), it is possible to form a coating film containing the microencapsulated insecticide only on the end surface (3) of the insulation material (1). If both surfaces are not coated with the surface material (2), the coating film may be formed on the exposed surface of the heat insulating material (1).

Instead of encapsulating an insecticide in the microcapsules used in the present invention, a repellent that pests dislike may be encapsulated therein. Moreover, if a rat poison or a rat repellent is used instead of an insecticide, feeding damage by rats can be prevented, and these can also be used in combination with the insecticide.

[Effect]

According to the insect-proof and heat-insulating board of the present invention, the micro-encapsulated insecticide is dispersed inside the heat-insulating material (1) or in the coating film formed on the surface of the heat-insulating material (1). Insecticides have extremely low volatility and remain stable for long periods of time, resulting in long-lasting insecticidal effects. In addition, the microcapsules are not exposed on the surface of the insect-proof insulation board.
Since it is coated with the synthetic resin or coating of the heat insulating material (1), its stability is further increased.

〔Effect of the invention〕

According to the insect-proof insulation board of the present invention, it is possible to completely prevent pests from eating the insulation board, maintain its insect-proofing effect for a long period of time, and completely eliminate toxicity to humans and animals. , there is no risk of polluting the environment.

[Brief explanation of the drawing]

FIGS. 1 and 2 are cross-sectional views of an example of the insect-proof insulation board of the present invention. (1) Heat insulating material, (2) Surface material, (3) End surface,
(4) Paint film. Patent applicant Toyo Tire & Rubber Industries Co., Ltd. Agent Patent attorney Yoshi Koyama 2nd Figure 1 Insulating shoes No. Drawing procedure amendment filed September/7th, 1989 Patent Application No. 32320, 1999 2, Title of the invention Insect-proof insulation board 3, relationship with the amended case Patent applicant address 1-17-18 Edobori, Nishi-ku, Osaka Name (3
14) Toyo Rubber Industries Co., Ltd. Representative Ken Katori 4, Agent May 15, 1999 (Shipped on May 30, 1999) 8゜Amendment Details The drawings will be amended as shown in the attached corrected drawings. Figure 4 and above! Insulating material surface material 3-/End face/Coating film procedure amendment (voluntary) 8゜The entire statement of contents of the amendment shall be amended as shown in the attached amendment statement. ■. Above the description of the case 1999 Patent Application No. 3 20 2゜Name of the invention Insect-proof insulation board 3゜Relationship with the case

Claims (2)

[Claims] (1) In a heat insulation board made of synthetic resin foam, a microencapsulated insecticide is dispersed inside the synthetic resin foam, or a coating film containing the microencapsulated insecticide is formed on the surface of the synthetic resin foam. Insect-proof insulation board characterized by: (2) The insect-proof insulation board according to claim 1, wherein a sheet-like surface material is laminated on both or one side of the plate-like synthetic resin foam.