JPH06270320A - Inorganic fiberboard - Google Patents

Abstract

PURPOSE:To inexpensively obtain an inorg. fiberboard homogenous in its two-dimensional direction and having high strength by integrally providing fiber reinforced layers wherein inorg. fibers are dispersed so that the longitudinal directions thereof mutually cross each other to both surfaces of an inorg. core material board. CONSTITUTION:Fiber reinforced layers 3 wherein inorg. fibers 2... are dispersed so that the longitudinal directions thereof mutually cross each other are integrally provided to both surfaces of an inorg. core material board 1 to constitute a non-combustible inorg. fiberboard 4. The core material board 1 is constituted of rock wool and a binder and each of the reinforced layers 3 is constituted by impregnating a sheet like article of inorg. fibers 2... with a binder. Since bending strength homogenous in the two-dimensional direction of the fiberboard is provided to the fiberboard by the fiber reinforced layers 3 whose fibers in the longitudinal direction are allowed to cross the fibers of the inorg. core material board 1, the strength of the inorg. fiberboard can be made sufficiently high as a whole. Since bending strength is imparted by the fiber reinforced layers 3 and the shape of the whole is retained by the inorg core material board 1, the inorg. core material board can be constituted of an inexpensive material without considering bending strength as an inorg. core material and the inorg. fiberboard 4 can be inexpensively produced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noncombustible inorganic fiber board used for walls and ceilings of buildings.

[0002]

2. Description of the Related Art As the above-mentioned inorganic fiber board, asbestos slate or calcium silicate board has been generally used, and mineral fiber is mixed therein for reinforcement by a continuous papermaking method.

[0003]

However, in the case of the continuous papermaking method as described above, the longitudinal direction of the mineral fiber is likely to be aligned with the traveling direction of the plate material, and the fiber is aligned in the aligned direction. The bending strength in the orthogonal direction is about 15% lower than the bending strength in the direction in which the fibers are aligned. In addition, the dry shrinkage in the direction orthogonal to the direction in which the fibers are aligned is 10 times greater than the dry shrinkage in the direction in which the fibers are aligned.
There are many%. Furthermore, since the whole plate is made of the same material and the fiber direction is not uniform as described above, the bending strength cannot be increased for the amount of the material used, and the strength is low as a whole.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an inorganic fiber board which is homogeneous in the two-dimensional direction and has high strength while being inexpensive to manufacture.

[0005]

In order to achieve the above-mentioned object, the inorganic fiber board of the invention according to claim 1 is arranged such that the longitudinal directions of the inorganic fibers are arranged on both sides of the inorganic core material board. The fiber reinforcing layers dispersed so as to intersect are integrally provided.

In order to achieve the above-mentioned object, the inorganic fiber board of the invention according to claim 2 has a plurality of fiber reinforcing layers in which the longitudinal directions of the inorganic fibers are aligned on both sides of the inorganic core material board. Are integrally provided by stacking the adjacent fiber reinforcing layers in such a manner that the longitudinal directions of the inorganic fibers of the adjacent fiber reinforcing layers intersect with each other.

[0007]

According to the constitution of the inorganic fiber board of the invention according to claim 1, the fiber reinforcing layer in which the longitudinal direction of the inorganic fibers provided on each of the both sides of the inorganic core board is maintained while the whole shape is maintained by the inorganic core board. Thereby, it is possible to give a uniform bending strength in the two-dimensional direction.

Further, according to the structure of the inorganic fiber board of the invention according to claim 2, while keeping the whole shape with the inorganic core material board,
The fiber reinforcing layer laminated on both sides of the inorganic fiber so that the longitudinal directions of the inorganic fibers intersect with each other allows more uniform bending strength in the two-dimensional direction.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a first inorganic fiber board according to the present invention.
FIG. 4 is a partially cutaway perspective view showing an embodiment, in which a fiber reinforcing layer 3 in which inorganic fibers 2 are dispersed so as to intersect with each other in the longitudinal direction is integrally provided on both surfaces of an inorganic core plate 1. The incombustible inorganic fiber board 4 is configured.

The inorganic core material plate 1 is composed of rock wool and a solidifying material, and its specific gravity is about 0.4 to 0.8. The fiber reinforcing layer 3 is formed by impregnating a sheet material of the inorganic fibers 2 ... As the inorganic fibers 2, fibrous wollastonite needle crystals obtained by crushing, rock wool, glass fibers, metal fibers such as stainless fibers, and the like are used, and their specific gravity is 1.8 to
It is about 2.0. As the solidifying material, cement paste or an organic solidifying material such as acrylic resin emulsion or phenol resin is used.

Next, a method for manufacturing the inorganic fiber board 4 will be described. As shown in the side view of FIG. 2, a dispersion liquid obtained by dispersing the inorganic fibers 2 in water on a felt-shaped filter cloth belt 7 wound around a driving roller 5 and a driven roller 6 from a liquid storage tank 8. Immediately after the supply, the comb material 9 is reciprocated in a direction orthogonal to the moving direction of the filter cloth belt 7 as shown in the enlarged side view of the main part of FIG. The longitudinal direction of the inorganic fibers 2 is orthogonal to that of the lower layer side. The comb material 9 is set so that the tip of the comb material enters a depth h / 2 which is half the depth h of the dispersion liquid immediately after being supplied onto the filter cloth belt 7.

A scraper 10 is provided at a predetermined position on the circumferential surface of the driving roller 5, and the sheet-shaped inorganic fibers 2 are fed while the longitudinal directions of the fibers are orthogonal to each other and dehydrated. Peel from.

The sheet-like inorganic fibers 2 thus obtained are impregnated with a binder to form a fiber reinforcing layer 3, and the inorganic core material plate 1 described above is placed on the fiber reinforcing layer 3. Further, the fiber reinforcing layer 3 is placed on the inorganic core material plate 1, pressed in the thickness direction and then solidified to obtain the inorganic fiber plate 4. At this time, if the same type of substance is used as the solidifying material, it is not necessary to use an adhesive agent between the inorganic core material plate 1 and the fiber reinforcing layers 3 and 3, but if a different solidifying material is used. An adhesive may be used for this.

FIG. 4 shows a second part of the inorganic fiber board according to the present invention.
FIG. 3 is a partially cutaway perspective view showing an embodiment, and a first fiber reinforcing layer 3a in which the longitudinal directions of the inorganic fibers 2 are aligned on both sides of the inorganic core material plate 1 having the same configuration as that of the first embodiment.
Are integrally provided, and further, the first fiber reinforcement layers 3a, 3
a, in which the longitudinal directions of the inorganic fibers 2 are aligned with the first fiber reinforcing layers 3a on the respective surfaces in a state where the longitudinal directions of the inorganic fibers 2 ... Cross the directions orthogonal to each other. The fiber reinforcing layer 3b is integrally provided to form the non-combustible inorganic fiber board 4a.

The first and second fiber reinforcing layers 3a, 3
As each of b, in the manufacturing method of the inorganic fiber board 4 in the above-described first embodiment, the comb material 9 is eliminated, and the sheet-shaped inorganic fiber 2 in which the longitudinal directions of the fibers are aligned is manufactured,
It is formed by impregnating it with a solidifying material.

In manufacturing the inorganic fiber board 4a, first, one second fiber reinforcing layer 3b is placed, and the first fiber reinforcing layer 3b is placed on the first fiber reinforcing layer 3b so that the longitudinal directions of the inorganic fibers 2 are perpendicular to each other. Of the first fiber reinforcing layer 3a, the inorganic core material plate 1 is placed on the first fiber reinforcing layer 3a, and the first fiber reinforcing layer 3a is further placed on the inorganic core material plate 1. , The second fiber reinforcing layer 3b is placed so that the longitudinal directions of the inorganic fibers 2 are orthogonal to each other.
The inorganic fiber board 4a is obtained by pressing in the thickness direction and then solidifying.

[0018]

As described above, according to the inorganic fiber board of the invention of claim 1, in the two-dimensional direction, the fiber of the inorganic core material plate and the fiber reinforcing layer in which the direction of the fiber longitudinal direction intersects each other. Since it has a uniform bending strength, the strength of the whole inorganic fiber board can be made sufficiently high. Moreover, since the fiber reinforcing layer has bending strength and the whole shape is maintained by the inorganic core plate, the inorganic core plate can be made of an inexpensive material without considering the bending strength. Can be manufactured at low cost.

According to the inorganic fiber board of the second aspect of the present invention, although the fiber reinforcing layers have the same longitudinal direction of the fibers, they are laminated so that the longitudinal directions of the fibers intersect. As a result, a more uniform bending strength is provided in the two-dimensional direction, so that the strength of the inorganic fiber board as a whole can be made sufficiently high. Moreover, since the fiber reinforcing layer has bending strength and the whole shape is maintained by the inorganic core plate, the inorganic core plate can be made of an inexpensive material without considering the bending strength. Can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing a first embodiment of an inorganic fiber board according to the present invention.

FIG. 2 is a schematic side view of an apparatus for obtaining a sheet-shaped inorganic fiber.

FIG. 3 is an enlarged side view of a main part.

FIG. 4 is a partially cutaway perspective view showing a second embodiment of the inorganic fiber board according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inorganic core material board 2 ... Inorganic fiber 3 ... Fiber reinforcement layer 3a ... 1st fiber reinforcement layer 3b ... 2nd fiber reinforcement layer 4 ... Inorganic fiber board 4a ... Inorganic fiber board

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masako Ryukaku, Masako Ryukaku 4-1-1-13 Honmachi, Chuo-ku, Osaka Stock Company Takenaka Corporation Osaka Main Store (72) Inventor Takafuku Fukuda 1 Inami, Inami-cho, Higashitaha-gun, Toyama Prefecture No. 1 in Daiken Kogyo Co., Ltd. (72) Inventor Takao Akio Inami, Inami-cho, Higashibaba-gun, Toyama Prefecture No. 1 in Daiken Kogyo Co., Ltd.

Claims (2)

[Claims] 1. An inorganic fiber board characterized in that a fiber reinforcing layer in which inorganic fibers are dispersed so as to intersect with each other in the longitudinal direction is integrally provided on both surfaces of the inorganic core material board. 2. A plurality of fiber-reinforcing layers in which the longitudinal directions of the inorganic fibers are aligned on both sides of the inorganic core plate in a state where the longitudinal directions of the inorganic fibers of adjacent fiber-reinforcing layers intersect with each other. An inorganic fiber board characterized by being laminated and integrally provided.