JPH06182917A - Fiber board for construction - Google Patents

Abstract

PURPOSE:To enable a fiber board for construction to be equipped with excellent sound absorption and fire protecting performance of mineral fiber and a light- weight property of synthetic resin foam by a method wherein a mixture of unhardened synthetic resin and the mineral fiber is laminated on at least one side of the synthetic resin foam, hot pressed, and a hardened mineral fiber layer is provided. CONSTITUTION:A mixture of unhardened synthetic resin and mineral fiber is laminated on at least one side of synthetic resin foam 1, hot pressed, and a hardened meneral fiber layer 2 is formed. Mineral fiber used for the mineral fiber layer 2 is fiberized rock wool and fiberized glass wool by means of blast furnace slag and basalt as raw materials. Since the mixture of the unhardened synthetic resin and the mineral fiber is laminated on the surface of the synthetic resin foam 1 and hot pressed, the unhardened synthetic resin and the mineral fiber, and the mineral fiber and the mineral fiber are mutually connected to be fixed at a point or on a line, and integrated in the mixture. Therefore, the light-weight mixture of a thin thickness can be obtained without decreasing excellent characteristics of fire protecting performance and sound absorption.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiberboard for construction in which a mineral fiberboard such as rock wool or glass wool and a synthetic resin foam are laminated.

[0002]

2. Description of the Related Art Conventionally, mineral fiber boards made of mineral fibers such as rock wool and glass wool have excellent properties such as fireproofness and sound absorption, and lightweight properties of synthetic resin foams such as mechanical strength. There has been a demand for a fiberboard for construction that includes both of these, and a fiberboard made of a mineral material manufactured by a papermaking method and a synthetic resin foam have been developed using an adhesive agent.

[0003]

However, it is difficult to reduce the thickness of the mineral fiber board to 7 mm or less from the standpoint of papermaking and strength in handling such as laminating work. The synthetic fiberboard made of synthetic resin foam and an adhesive was thickened. In addition, since the adhesion between the mineral fiber board and the synthetic resin foam is surface-to-surface adhesion, the mineral fiber board obtained by the paper-making method easily peels off and requires a large amount of adhesive. Many parts of the body's surface were covered, which sometimes adversely affected the sound absorption and fire resistance of the synthetic resin foam. Furthermore, a step of laminating the mineral fiber board and the synthetic resin foam was required. Therefore, it has been desired to develop a building fiberboard that is thin, light, and has excellent strength and fire resistance. The present invention solves the above-mentioned problems and provides a building fiberboard having the excellent properties of a mineral fiberboard and the lightness of a synthetic resin foam, and the thickness of the mineral fiberboard which has hitherto not been obtained is 5 mm. An object of the present invention is to provide the following architectural fiberboard.

[0004]

Means for Solving the Problems The above-mentioned problem is obtained by laminating a mixture of an uncured synthetic resin and a mineral fiber on at least one surface of a synthetic resin foam of the present invention, hot pressing and curing the mineral fiber layer. It is solved by the fiberboard for construction characterized by having.

The mineral fiber used in the mineral fiber layer of the present invention is rock wool fiberized by a known manufacturing method from blast furnace slag or basalt, or glass wool fiberized by a known manufacturing method. 1 mm to 50 m
The fiber diameter is about 1 to 20 μm.

The resin used for the mineral fiber layer of the present invention is an uncured phenol resin or melamine resin, and known resins can be used. The resin is used in a proportion of 1 to 45 parts by weight with respect to 100 parts by weight of the mineral fiber.

If necessary, glass wool, wollastonite, mica, talc, attapulgite, etc. may be used in the mixture of mineral fiber and resin of the present invention as an inorganic reinforcing material. Moreover, you may use calcium carbonate, clay, etc. as a filler.

The synthetic resin foam plate used in the present invention is
It may be made of phenol resin, styrene, or the like, but a phenol resin foam plate is particularly preferable in terms of fire resistance. The density of the synthetic resin foam plate is 30 to 500 kg / m3. When the density is 30 or less, the foam layer breaks during press molding, and 5
When it is 00 or more, the lightness and the heat insulating property are poor.

The mixture of the mineral fiber and the resin of the present invention laminated on at least one surface of the synthetic resin foam plate is 2 per 1 m 3.
It is from 00 to 500 kg. If it is more than 500 kg, the original desirable properties of the mineral fiber board will be deteriorated, and if it is less than 200 kg, the surface strength will be insufficient and handling will be difficult.

The hot pressing performed in the present invention has a temperature of 1
A spacer is inserted at 50 to 250 ° C. for a pressing time of 3 to 30 minutes and the product is pressed to a desired thickness.

[0011]

In the present invention, the mixture of the uncured synthetic resin and the mineral fiber is laminated on the surface of the synthetic resin foam and heat-pressed, so that the mixture is the synthetic resin foam and the mineral fiber, or the mineral fiber and the mineral material. The fibers are connected and fixed together at points or lines to integrate them. For this reason, there is no large amount of adhesive such as the conventional one in which a synthetic resin foam plate and a mineral fiber plate are bonded together with an adhesive, so that the excellent properties such as fire resistance and sound absorption are not deteriorated. It is possible to obtain a lightweight and thin architectural fiberboard.

[0012]

【Example】

[Example] Granular rock wool (# 42 manufactured by Nitto Boseki Co., Ltd.) was opened using a cotton opening machine known in cotton spinning, and after the opening, 475 g of rock wool and phenol resin (Gunei Chemical Industry Co., Ltd.) 25 g of REGITOP PG-4121) is stirred with air to obtain a mixture. From the mixture, 56 g was sampled and evenly spread in a 250 mm × 250 mm × 40 mm mold to give a density of 250 mm × 250 mm × 5 mm 10
A 0 kg / m @ 3 foamed phenol plate is placed, and 56 g of the mixture is sampled and laid evenly in the same manner. Next, the mold of the above sample was removed, a 10 mm spacer was used, and the plate temperature was 20.
Pressed with a hot press at 0 ° C for 5 minutes, 250 m as shown in Fig. 1.
An architectural fiberboard of m × 250 mm × 10 mm (thickness of mineral fiber layer: upper surface 2.5 mm, lower surface 2.5 mm) was obtained.

[Comparative Example] Rockwool was made into paper by a conventionally known papermaking method, and the size was 250 mm × 250 mm as shown in FIG.
A mineral fiber board of × 10 mm was obtained. Table 1 shows the densities and bending strengths of Examples and Comparative Examples.

[0014]

[Table 1]

[0015]

As is clear from the results shown in Table 1, according to the present invention, it is possible to obtain a building fiberboard having the excellent properties of the mineral fiberboard and the light weight of the synthetic resin foam.

[Brief description of drawings]

FIG. 1 is a schematic view of a building fiberboard of the present invention.

[Fig. 2] Schematic view of a conventional rock wool fiberboard

[Explanation of symbols]

 1. Mineral fiber layer 2. Synthetic resin foam 3. Rock wool fiberboard

Claims (1)

[Claims] 1. A building fiber comprising a synthetic resin foam and a mineral fiber layer obtained by laminating a mixture of an uncured synthetic resin and a mineral fiber on at least one surface of the synthetic resin foam, and hot pressing the mixture. Board.