JPS5829648A - Inorganic fiber board and its manufacture - Google Patents

Abstract

PURPOSE:To obtain an inorganic fiber board having excellent fire proofness and excellent heat insulation property by a method in which a magnesium oxide mixed water is adhered to an inorganic fiber in static state while molding it into a plate form in such a way that the magnesium oxide is hardened and the fibers are bonded with one another without breaking the fibers. CONSTITUTION:For example, slug wool 1 oriented sidewards is set between metal nets 3 in a dipping tank 2 flled with a magnesium oxide mixed water 4 being circulated through a circulation pipe 5 with an opening at the bottom of the tank, a compounding tank 6, and a supply pipe 7. The slug wool 1 is brought into contact with the magnesium oxide mixed water 4 flowing, during which magnesium oxide in the mixed water 4 is adhered to the suface of the slug wool 1. Afterwards, the slug wool 1 is taken out and sent to a hot press molding machine for molding, where the magnesium oxide is hardened to bond the fibers of the slug wool 1 together. Thus, an objective inorganic fiber board can be obtained. EFFECT:Heat proofness and water resistance are excellent.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides mineral edge H, <1: board, i.e., rock wool;
This article relates to boards made of slag wool or glass wool generated during steel manufacturing, and their manufacturing method.

The aim is to propose a board with excellent fire resistance, heat resistance, water resistance, and high heat insulation properties.

Conventional inorganic fiber boards are made by binding fibers together using a synthetic resin or starch adhesive as a binder, and at the same time forming them into a plate shape. Therefore, inorganic fibers are nonflammable, but since the binder is flammable, l1
It had the disadvantage of low flammability. 9 Furthermore, when a starch-based binder or the like was used, the water resistance was also significantly reduced. Unfortunately, when manufacturing boards, conventional binders usually have a high viscosity, so it is necessary to stir the fibers in order to uniformly impregnate the binder between the fibers. During stirring, the Ml: fat breaks off and scatters in small, nug-like shapes, deteriorating the cropping environment and causing silicosis. The gist is that an inorganic edge is characterized by inorganic fibers bound together using magnesium oxide as a binder. 3゜ which is an f1 board. Since this board is bonded to the (]ψ compound of magnesyrano oxide, there is no ignition or combustion f1, and the melting point of magne oxide / ram iJ: 280
0 ``C; It has excellent heat resistance and has excellent heat resistance.The binder does not disintegrate even if it is immersed in water for a long time. Since a large number of microscopic deagglomerated air layers are formed between the bound fibers, high heat insulation performance can be imparted.

Inorganic fibers used for this board include rock wool, slag wool, glass wool, carbon d1. Rock wool and glass wool have high heat resistance, and when magnesium oxide is used as a binder, it is possible to make a board with extremely high heat resistance, and it is suitable at low cost. Is magnesium oxide highly pure? A fine particles are preferable, but are not necessarily limited to this.

This inorganic fiber board has a porous structure with fine air layers between bound fibers, and can have various porosity and bulk density depending on the amount of magnesium oxide binder, compression molding conditions, etc.

In order to make a board with high heat insulation properties and practical strength, the bulk density is usually 600 to 700K47m", and 5ooK
Approximately 9/m'' is suitable.

Below, we will explain the manufacturing method of this inorganic fiber board with drawings.

In FIG. 1, slag wool 1 oriented approximately two-dimensionally (+, 17- directions) is immersed/11t tank 2 internal network 3:1
Fill the immersion tank 2 with magnesium oxide/ram mixed water 4 placed between -C, add this /lI' and the combined water 4 to 4I1
5. Circulation pipe opening at the bottom of 11i. Preparation tank (i,
6.Glass wool + (d', Mr.), which circulates through the supply pipe 7, contacts the moving mixed water 4, and the acid ratio magnesium in the mixed water/1 reaches the surface of the glass wool 1. 1. When the amount of slag wool reaches the appropriate amount, take out the slag wool 1 and do not move it to the next heat forming device.
In FIG. 1, 8 is a valve, 9 is a pump, and 10 is a magneto oxide/lamb raw material tank 1. In the thermoforming apparatus II shown in FIG. While being raised and lowered by the jack 13, the plate 14 presses to the desired position,
At the same time, additional steam is blown into the formwork 12 to perform high-temperature, high-pressure steam curing.1. The magnesium oxide adhering to the glass wool 1 is cured, and the 11" interlocking fibers of the slag wool 1 are bonded together and formed into a plate-like shape.

In this production method, the magnesium oxide mixed water is a suspension with a weight ratio of 20 to 30 percent magnesium oxide and 60 to 90 water, and has good fluidity, flows well between the slag wool, circulates, and stands still. Magnesium oxide adheres uniformly to the slag wool in this state. However, the moisture can be easily separated and it can be made into a board by heat molding.

Therefore, production efficiency is high, and since the slag wool is not stirred, the production environment is favorable without scattering of slag wool pieces.

Magnesium oxide containing moisture can harden in the air at room temperature and bind fibers together to form a board.

However, in order to develop strength in a short period of time and create a board,
Needless to say, heat curing is practical. Well, this board is coated with magnesium oxide water baset etc. on the surface layer to form a dense skin layer and close the internal voids. Since this board is impermeable to fluids, its fire resistance, heat resistance, water resistance, and heat insulation properties are further improved.
The glass wool of 38.581 (7) was immersed in the water mixed with fine particles of magnesium oxide 8.4 K7, and the mixed water was circulated to collect oxidized red sea bream and barley on the surface of the slag wool *'t 4-r 1. Transfer the slag wool to a heating molding device at 1'1°C and cure it with saturated steam to a thickness of 13 mm.
I got 10 boards with 90 accuracy. −, boat 1″l’+
The i-density was approximately 0.5 Ky/min.

The performance of this board is as follows.

Heat resistance: Propane gas burner straight 1/850-900”
As a result of flame-grilling at c for one hour, the flame surface was slightly discolored but the shape remained intact, and the back side was 11゛.

Hygroscopicity: Heavy when left indoors: 1; - No change 3; Water resistance: After 24 hours of immersion in static water and 5 hours of immersion in shaking water.
τ] No change in method, weight U1 after shaking off free moisture; increase d, not observed 1° This invention is as described above, and this board is fireproof, surface 1
It has excellent heat and water resistance, as well as insulation properties. Also,
This manufacturing method is efficient and does not harm the working environment.

[Brief explanation of the drawing]

The drawings show the manufacturing process of the board of this invention.
The figures are a vertical cross-sectional view showing an overview of the process of depositing magnesium oxide in a dipping tank, and a vertical cross-sectional view showing an overview of the heat forming process in FIG. 1... Slag wool, 2... Soaked layer, 3
... Wire mesh, A ... Magnesium oxide mixed water, 5 ... Circulation J) 7 pipe, 6 ... Mixing tank, 7 ... Supply pipe, 8... Valve, 9... Pump, 10... Geno': 1 tank, 11... Heat forming device, 12...
Formwork, 13... Jatsugi, 14... Pressure plate. Patent applicant: Sumitomo Metal Industries, Ltd. (7) Figure 1 Figure 2 283

Claims (2)

[Claims] (1) An inorganic fiber board characterized by inorganic fibers bound together using magnesium oxide as a binder. (2) Magnesium oxide 4 in deweighted inorganic fibers
An inorganic fiber board characterized by moving and contacting L-water, adhering magnesium oxide to the surface of the inorganic fibers, forming it into a plate shape, and at the same time hardening the adhering magnesium oxide to bond the fibers together. Manufacturing method.