JPS5825344B2 - Manufacturing method of non-combustible insulation material using styrofoam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a heat insulating material that imparts nonflammability to polystyrene foam so that it can be used for various purposes.

Recently, many indoor rooms are equipped with heating and cooling systems, and as a result, the demand for heat insulating materials has increased, and their uses have expanded significantly.

Conventionally, materials used as insulation materials include rock wool, slag wool, and glass wool (glass fiber).
On the other hand, Styrofoam is far superior to the above-mentioned rock wool and other insulating materials in terms of insulation properties, and is also easy to install, but on the other hand, it is not fireproof and may burn with black smoke. It has a fatal flaw as a building material.
Therefore, it is only used as a heat insulating material in places that do not require any consideration for fire prevention, and the places where it can be used are extremely limited.

In view of the above-mentioned circumstances, this invention was developed as a result of research aimed at imparting fire retardant properties to Styrofoam and expanding its use as a heat insulating material.The present invention was developed by coating the surface of granular Styrofoam with a glue and then applying fine lime powder. It has been discovered that by doing so, it is possible to obtain a heat insulating material that has extremely excellent fireproofing properties and does not generate any black smoke.

Here, the granular Styrofoam used as raw material is
You can use completely crushed items such as discarded Styrofoam boxes.

In addition, as the glue, a synthetic or natural glue such as CMC1 square tint dissolved in water is used.

Then, the surface of the granular expanded polystyrene is coated with a paste by a method such as dipping it in the above-mentioned paste.

Next, fine lime powder is added to the granular Styrofoam treated in this way, and by means such as vigorous stirring, the fine lime powder is adhered to the surface of the granular Styrofoam coated with glue, and then dried to form a product. .

In this way, granular foamed polystyrene with fine lime powder attached to its surface does not burn even when brought close to a flame, and no black smoke or the like is generated.

This is because the granular foamed polystyrene is heated and melted and at the same time adsorbed by the fine lime powder on the surface, so combustion is prevented and no black smoke is observed.

Moreover, the styrofoam according to the present invention has the above-mentioned properties.
In addition to being nonflammable, it also has excellent sound absorption and heat insulation properties, similar to conventional styrofoam, and therefore, according to this invention, an extremely excellent noncombustible heat insulating material can be obtained. .

Moreover, the heat insulating material according to the present invention can be supplied at a low cost because it can use crushed discarded Styrofoam boxes as a raw material, and since it is in granular form, it is easy to handle and can be placed between walls to be insulated. You can easily increase the insulation effect just by filling it.

Furthermore, since it is nonflammable and does not produce gas or flames, there is no need to worry about oxygen deficiency in the event of a fire.

Due to these excellent properties, the heat insulating material according to the present invention can be used widely without being limited to the places where it can be used.

Therefore, this invention has made a major contribution to fields such as architecture that require excellent insulation materials, and has also had an impact on the industrial world in the sense that it has pioneered a method of reusing waste materials such as Styrofoam boxes. is extremely large.

Examples of this invention will be shown below.

Styrofoam waste is crushed to a diameter of about 7 mr/L,
In the crushed material 21, 0.7 g of a sizing agent dissolved in water was added.
071 was added and stirred, then 50 g of lime powder was added and stirred, and the product was dried.

When the thus treated granular foamed polystyrene was subjected to a combustion test by bringing a flame close to it, it did not burn and no black smoke was observed.

On the other hand, untreated granular Styrofoam is
It burst into flames and burned with black smoke.

Furthermore, regarding sound absorption and heat insulation effects, the Styrofoam treated according to the present invention exhibited excellent effects similar to those of granular Styrofoam that was not subjected to the treatment.

Claims (1)

[Claims] 1. A method for producing a noncombustible heat insulating material using expanded polystyrene, characterized by coating the surface of granular expanded polystyrene with a glue and adhering fine lime powder to the surface.