JPH05147133A - Production of fireproof honeycomb core - Google Patents

Abstract

PURPOSE:To produce a honeycomb core excellent in fireproof capacity, capable of certainly clearing prescribed temp., for example, in the base material fireproof capacity test of the notification of the Ministry of Construction or JIS, excellent in humidity resistance, durability, strength or the like and also excellent from the aspect of cost. CONSTITUTION:At first, a honeycomb core 1 is molded using paper made of mixed pulp based on an inorg. material such as aluminum hydroxide and reduced to 30wt.% or less in the content of an org. material such as pulp and dipped in a mixed solution containing sodium silicate, water and a predetermined bonding mixing agent in a ratio of 100:5-300:5-350 on a pts.-wt. basis. The immpregnated honeycomb core is dried to obtain a required fireproof honeycomb core. In the first place, an inorg. material is mainly used and a fireproof agent is bonded and, in the second place, the bonding amount of sodium silicate alone is reduced and, in the third place, respective components are inexpensive.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for manufacturing a fireproof honeycomb core. That is, the present invention relates to a method for producing a fireproof honeycomb core used as a core material of a fireproof furnace or a sandwich panel for partitioning.

[0002]

2. Description of the Related Art As a base paper for such a fireproof honeycomb core, aluminum hydroxide paper, magnesium silicate paper, aluminum silicate paper, phosphoric acid pulp paper and the like are first considered as alternatives to asbestos. Although the names of the base papers are indicated on those containing a large amount of their main components, fire protection performance is insufficient for such honeycomb cores formed by a single product, and for example, the Ministry of Construction Notification and JIS In the specified base material fire protection performance test, the specified temperature is far exceeded and it cannot be cleared. Therefore, conventionally, a fireproof honeycomb core in which such a honeycomb core is coated with liquid sodium silicate has been manufactured and used.

[0003]

By the way, the following problems have been pointed out in such a conventional example. That is, since this conventional fireproof honeycomb core is manufactured by coating a honeycomb core made of aluminum hydroxide paper, magnesium silicate paper, aluminum silicate paper, phosphoric acid pulp paper, etc. with sodium silicate as a fireproofing agent. Excellent in fireproof performance, withstands Ministry of Construction notification and JIS base material fireproof performance test, and can clear the specified temperature. However, this conventional fireproof honeycomb core is inferior in moisture resistance, durability, strength, etc., and has a problem that quality cannot be practically maintained for a long period of time. That is, since the surface of this fireproof honeycomb core is coated with water-soluble sodium silicate, which is also called water glass, if it is used for a long period of time or exposed to rainwater, the surface will melt or flow out. It has been pointed out that there is a problem in that it tends to be damp and that there are difficulties in terms of moisture resistance, durability, strength, etc.

In view of such circumstances, the present invention has been made to solve the problems of the above-mentioned conventional examples, in which an inorganic material such as aluminum hydroxide is the main component and an organic material such as pulp is in a weight ratio. Was mixed with 30% or less of the mixed paper, and then dipped in a mixed solution of a predetermined weight part of sodium silicate, water, and an adhering admixture having water of crystallization, adhering and drying, First, it has excellent fire protection performance, and second
Firstly, it is an object of the present invention to propose a method for manufacturing a fireproof honeycomb core, which is excellent in moisture resistance, durability, strength, etc., and thirdly, is also excellent in cost.

[0005]

The technical means of the present invention for achieving this object are as follows. That is, the manufacturing method of this fireproof honeycomb core is as follows:
Inorganic materials such as magnesium silicate as the main component, pulp,
A honeycomb core, which is a planar aggregate of hollow columnar cells, is formed from a mixed paper mixed with an organic material such as a binder at an upper limit of 30% by weight. Then, next, the honeycomb core is treated with 100 parts by weight, 5 parts by weight to 300 parts by weight, and 5 parts by weight of 3 parts of sodium silicate and an adhering admixture having water and crystallization water.
The fireproof honeycomb core is obtained by immersing the mixture in a mixed solution of 50 to adhere them, and then drying.

[0006]

Since the present invention comprises such means, it operates as follows. In this manufacturing method, a honeycomb core is formed of a mixed paper containing an inorganic material such as aluminum hydroxide as a main component and an organic material such as pulp mixed in a predetermined manner, and a predetermined weight part of sodium silicate, water and crystal water are formed. The fire-retardant honeycomb core is obtained by immersing the mixture in a mixed solution of the adhering admixture having the above, adhering them, and then drying. Therefore, firstly, this fireproof honeycomb core is mainly composed of an inorganic material,
Sodium silicate, which is a fireproof agent, is attached,
Excellent fire protection performance. Along with this, secondly, the amount of sodium silicate deposited as a single product is small, and since it is attached by the amount of the adhering admixture, it is excellent in moisture resistance, durability, strength and the like. In addition, since the pulp is mixed, the strength is further excellent. Thirdly, aluminum hydroxide, pulp, sodium silicate, etc. are inexpensive and excellent in cost.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the embodiments shown in the drawings. FIG. 1 is a perspective view for explaining an embodiment of the present invention. In this manufacturing method, first, the honeycomb core 1 is made of a mixed paper containing an inorganic material such as aluminum hydroxide and magnesium silicate as a main component, and an organic material such as pulp and a binder mixed in up to 30% by weight. Molded. As the inorganic material which is the main component of the mixed paper as the base paper, aluminum hydrate, which loses water at about 300 degrees Celsius and becomes aluminum oxide, magnesium silicate, aluminum silicate, calcium carbonate, glass fiber, etc. are used. Of course, these are in the form of powder, and it is impossible to make a single sheet into a sheet. Therefore, as the organic material, a mixed paper made by mixing pulp such as phosphoric acid pulp, these binders such as an acrylic binder, and a flame retardant treatment agent is used as a base paper.

Next, the ratio of these inorganic and organic materials will be described. First, if the organic material exceeds 30% by weight ratio (inorganic material becomes less than 70% by weight ratio), no matter how the fireproofing agent is used, the overall desired fireproofing performance may not be obtained, There is a large variation in the typical fire protection performance, and stable fire protection performance cannot be obtained. So from the perspective of fire protection performance,
It is desirable to reduce the ratio of organic materials and to reduce the inclusion of pulp and the like. However, in the ratio of the inorganic material and the organic material, when the weight ratio of the organic material is less than 10% (when the weight ratio of the inorganic material exceeds 90%), it is generally difficult to make the paper into a base paper. Not only is it easy, but also a problem easily occurs in the process of forming the honeycomb core 1. Therefore, in the examples, a mixed paper in which an organic material is mixed in a weight ratio of 10% or more and 30% or less and an inorganic material as a main component is 90% or less in a weight ratio and at least 70% or more is used as a base paper. It is used.

Then, such a mixed paper is used as a base paper, and predetermined portions thereof are adhered linearly with an inorganic liquid adhesive such as sodium silicate and stacked, and spread in the stacking direction. The honeycomb core 1 is molded. The honeycomb core 1 is made up of a planar aggregate of hollow columnar cells 2.
That is, it is composed of a planar assembly of a large number of hollow columnar cells 2 which are divided into independent spaces by the cell walls 3 made of raw paper, and which have various shapes such as a regular hexagon as shown in the drawing. The honeycomb core 1 is generally excellent in weight-specific strength, lightweight, and has high rigidity and strength, is also excellent in rectifying effect and flatness accuracy, has a large surface area per unit volume, is easy to mold, and has heat retention. It is known for its excellent sound-insulating properties and is widely used in various applications as various structural materials including core materials for fireproof furnaces and sandwich panels for partitions.

Next, in this manufacturing method, the molded honeycomb core 1 is based on water-soluble sodium silicate, and water and an adhering admixture having crystallization water are added in an amount of 100 parts by weight. After immersing them in a mixed solution consisting of 5 to 300 and 5 to 350 to adhere them,
The desired fireproof honeycomb core is obtained by drying. That is, since the base paper of the honeycomb core 1 constituting this fireproof honeycomb core is mixed with 10% or more and 30% or less of the organic material as described above, a predetermined weight part of the mixed material is mixed in order to take care of the fireproof performance. The crystallization water of the liquid is used as a treatment liquid, and the formed honeycomb core 1 is dipped in this, so that sodium silicate as a fireproofing agent and an adhering admixture are attached. As the adhering admixture, for example, a substance which is an inorganic material having crystal water such as aluminum hydroxide, sodium aluminum sulfate, alum, calcium chloride and calcium chlorate is used.

The method for manufacturing the fireproof honeycomb core according to the present invention is as described above. Then it becomes as follows. In this method for manufacturing a fireproof honeycomb core, first, an inorganic material such as aluminum hydroxide or magnesium silicate is used as a main component, and an organic material such as pulp is 30% by weight.
The following mixed paper is used as a base paper, and the honeycomb core 1 is formed by expansion using an adhesive such as sodium silicate. Then, the honeycomb core 1 is, for example, 100: 15
By dipping in a mixed solution of water-soluble sodium silicate, water, and an adhering admixture having water of crystallization, which is made up of a predetermined weight ratio of 0 to 300, etc. The fireproof honeycomb core of is obtained. Therefore, in the method for manufacturing the fireproof honeycomb core, the following first, second, third
become that way.

First of all, the manufactured fireproof honeycomb core has an inorganic material such as aluminum hydroxide as a main component and an organic material such as pulp in an amount of 30% or less by weight, so that it has flame retardancy. At the same time, since sodium silicate, which is a fire retardant, is attached by impregnation, coating, etc.,
Overall, there is no variation and stable fireproof performance is obtained, and it has excellent fireproof performance. Along with this, secondly, this fireproof honeycomb core has a small amount of sodium silicate deposited as a single item (very small compared to the case of the conventional example of this kind described above), and since it is attached by the amount of the adhering admixture. Excellent in moisture resistance, durability and strength. Further, since pulp is mixed, the strength is excellent also from this aspect. Thirdly, aluminum hydroxide, pulp, sodium silicate, etc. are all cheap in price, so that this fireproof honeycomb core can be manufactured at an excellent cost.

Regarding the above-mentioned first fireproof performance, the results of the base material fireproof performance test are as follows. That is, 100 parts by weight 150 parts by weight of sodium silicate and water and 100 parts by weight of aluminum hydroxide as an adhering admixture.
The fireproof honeycomb core obtained by immersing the honeycomb core 1 having the cell 2 of 25 mm in size for 60 minutes and then drying it was used as the treatment liquid. Then, such a fireproof honeycomb core is placed in a furnace body of 750 degrees Celsius in accordance with Ministry of Construction Notification No. 1828,
The temperature rise was measured. That is, for each amount of sodium silicate, aluminum hydroxide, etc. attached to the fireproof honeycomb core, it was measured how many times the temperature rise in the fireproof honeycomb core with respect to the furnace temperature 750 degrees Celsius was measured. In the case (800 degrees Celsius or less), the base material fire prevention performance test was carried out by the method of clearing the specified temperature and judging that the fire prevention performance passed. The results are shown in Table 1 below. As shown in Table 1, the adhesion amount is 1.
In the case of 25 kg / m ³ or more, the temperature was less than plus 50 degrees and passed the specified temperature.

[0014]

[Table 1]

[0015]

EFFECTS OF THE INVENTION The method for manufacturing a fireproof honeycomb core according to the present invention is formed by a mixed paper containing an inorganic material such as aluminum hydroxide as a main component and an organic material such as pulp in a weight ratio of 30% or less. Is immersed in a mixture of a predetermined weight part of sodium silicate, water, and an admixture of adhering admixture containing water of crystallization,
By drying, the following effects are exhibited. That is, firstly, the fireproof honeycomb core manufactured in this manner has excellent fireproof performance, and can withstand the test and surely clear the specified temperature in, for example, the Ministry of Construction notification and the JIS base material fireproof performance test. Secondly, this fireproof honeycomb core has excellent moisture resistance, durability, strength, etc., and even if it is used for a long period of time and exposed to rainwater etc., the surface will melt, run out, and become moist as a whole. It is difficult to do, and the quality can be practically maintained for a long time. Thirdly, it can be manufactured with excellent cost. Thus, the effects of the present invention are remarkably large, such as the problems existing in this type of conventional example are eliminated.

[Brief description of drawings]

FIG. 1 is a perspective view of a honeycomb core used for explaining an embodiment of a method for manufacturing a fireproof honeycomb core according to the present invention.

[Explanation of symbols]

 1 honeycomb core 2 cells 3 cell walls

Claims (1)

[Claims] 1. A plane surface of a hollow columnar cell made of a mixed paper containing an inorganic material such as aluminum hydroxide and magnesium silicate as a main component and an organic material such as pulp and a binder in an amount of up to 30% by weight. A honeycomb core, which is an aggregate, is molded, and then the honeycomb core is mixed with 100 parts by weight of sodium silicate, water, and an admixing agent having water of crystallization, 5 to 3 parts by weight.
A method for manufacturing a fireproof honeycomb core, characterized in that the fireproof honeycomb core is obtained by immersing the mixture in a mixed solution having a ratio of 00 to 5 to 350 to adhere them, and then drying the mixture.