JPS62216977A - Manufacture of heat insulative inorganic foamed body with independent foames and equipment therefor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method and apparatus for producing a thermally insulating foam having closed cells, such as building materials, roofs of buildings,
It is mainly used in the industrial field that manufactures, sells, and uses heat insulating materials to provide heat insulation to parts that require heat insulation, such as refrigerated cars and freezers.

(Conventional technology) In general, insulation materials not only help provide comfortable living for buildings and residences, but also serve as essential materials for achieving the so-called "energy conservation" demands of the times. In addition, it has come to be widely used in the fields of ships, general vehicles, refrigerated vehicles, etc., and the types include foamed organic insulation materials such as foamed polystyrene and foamed polyurethane, and so-called rA, L, and C. There are a wide variety of inorganic heat insulating materials, including light foamed concrete (1 to 1) called .

By the way, organic insulation materials are flammable and are therefore unsuitable as building insulation materials.
, L, and C, have been increasingly used recently. This A,
L and C are not only nonflammable, but also have much better mechanical strength than foamed polystyrene, foamed polyurethane, etc., so they are extremely useful as building insulation materials, but their fatal flaw is that they have poor water absorption. It is to have.

The insulation properties of A, L, and C are significantly reduced by water absorption,
Not only can it not achieve its purpose as a heat insulator, but it can also be used in cold environments such as A, L, and C.

Currently, there are many defects in which the water inside freezes and causes destruction or cracks, which significantly reduces its usefulness as a heat insulating material.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned defects of A, L, and C in that generally hardened cement products inherently have poor water resistance and tend to absorb water. Nowadays, the large number of bubbles present in A, L, and C are not necessarily all closed cells.
It was discovered that there are many open cells, and this causes a so-called capillary phenomenon to promote water absorption, and research was completed focusing on this, and because it has fine and completely closed cells. Production of an extremely useful insulating inorganic foam that does not absorb water and therefore has excellent strength without the risk of breaking or cracking even in cold environments, and does not reduce its intended insulation effect. The purpose of this company is to provide manufacturing methods and manufacturing equipment.

More specifically, the inventors of the present invention are A.L.

C0 bubbles are formed when the aluminum powder that has been uniformly separated into the cement slurry is turned into aluminum oxide by the alkali of the cement, and at the same time generates hydrogen gas. It is difficult to control the size of bubbles to a constant level by means of
We have confirmed through numerous experiments that it is easy to form open cells.
As a result of various research, they succeeded in achieving the above objectives by perfecting a foaming means that made it possible to control the uniformity of the bubbles and form fine and completely closed cells.

(Means for Solving the Problems) In order to achieve the above object, the method for producing a heat insulating inorganic foam having closed cells according to the present invention includes
When a protein-based air-entraining agent is added to a slurry made by mixing silica sol or other inorganic curable substances with aggregate and water to produce a heat-insulating inorganic foam, fine and uniform closed cells are generated. Using a vessel, the above-mentioned protein-based air entraining agent, water and compressed air are appropriately introduced into the processing vessel and passed through, and then supplied into the above-mentioned slurry and stirred, and then cured according to a conventional method. It is characterized by:
The apparatus for carrying out this manufacturing method has a plurality of particles having different particle sizes between a protein-based air entrainment agent supply mechanism and a slurry storage/stirring tank made by adding aggregate and water to an inorganic hardening substance. A large number of coarse particles, such as seed-sized glass beads, are divided and housed in a container from a group of coarse particles to a group of fine particles, and a fluid is configured to flow through the group of coarse particles. The protein-based air-entraining agent supply mechanism is connected to the coarse particle group side of the closed-cell generation treatment device, and the processed material in the closed-cell generation treatment device is stored in the slurry. It is characterized by being configured so that it can be supplied into 10 stirring tanks.

(Function) In the present invention having the above configuration, when the protein-based air entraining agent is introduced into the closed cell generating treatment device along with water and compressed air, the air entraining agent is made fine and uniform in size while passing through the treatment device. It generates countless closed cells, and when mixed with the slurry mainly composed of an inorganic curable substance in the next step, the cells of the product, the heat-insulating inorganic foam, are held in a countless number of uniformly fine closed cells. be.

(Example) Hereinafter, an example of the present invention will be described based on an example of an apparatus schematically shown in the accompanying drawings.

Example 1 In FIG. 1, 1 is a protein-based air entraining agent supply mechanism, and the air is connected to a compressed air supply source (compressor) 2 and a protein-based air entraining agent tank 3 via a pipe P1. It is composed of an entrainment agent supply pump 4 and a water supply pump 6 connected to a water tank 5 via a pipe P2.
The respective mixtures are introduced through separate pipes P3, P4, and Ps into one side of the closed-cell generation treatment device 7, which will be described next, via a confluence pipe P6,
Vl, V2, and V3 are control valves provided on each of the pipes. The closed cell generation treatment device 7 has a plurality of partitions, for example four in this embodiment, by partitioning the inside of the treatment device main body 8, which is a cylindrical container, with a plurality of partition walls 9, such as wire mesh, perforated plates, etc., that allow circulation. 110a, 10b, 10c, 1
A group of coarse particles 11a consisting of multiple types of nice glass beads, etc. having different particle sizes as described below is arranged in a row in each compartment.
, llb , llc , 11d as coarse-grained bodies f! '
The fine grain group 11d is accommodated in order from the fla to the fine grain group 11d. That is, the first branch 10a has φ
The particle group 11a of 8 m is placed in the second compartment iob with a diameter of 6 m.
A closed-cell generation processor 7 is constructed by accommodating a granule group 11b of m diameter, a φ4M granule group 11c in the third compartment 10C, and a φ2 layer granule group 11d in the fourth compartment 10d. Then, the final compartment 10d of the processing device and the inorganic curable substance thriller storage/lj2 stirring tank 12 are communicated via the supply pipe 13, and the protein-based air entraining agent supply mechanism 1, the closed-cell generation processing device 7, and the slurry A device is constructed in which storage/stirring tanks 12 are sequentially connected.

Using the apparatus configured as above, first, 1 to 100 parts of Portland cement, 100 parts of finely divided calcium carbonate (300 mesh, 60% or more), 100 parts of silica sand No. 7,
A rement slurry made by adding 150 parts of water to 1 part of glass fiber cut into a length of 2M and stirring is stored in the storage/stirring tank 12. Next, the valves v1, V2, and V3 of the protein-based air entraining agent supply mechanism 1 are adjusted to supply compressed air of 6 KfJ/cm from the compressed air supply source 2 and the protein-based air entraining agent from the pump 4.6. When the apparatus is operated by adjusting the entraining agent in tank 3 and the water in water tank 5 so that a 5% protein-based air entraining agent aqueous solution is introduced into the closed-cell generation treatment mold 7, the treatment device By passing through the aqueous solution of the protein-based air entraining agent, numerous fine and uniform closed cells can be generated and removed, and the required amount of this bubbly solution is supplied into the cement slurry storage/stirring tank 12. Mix and stir to obtain closed-cell cement slurry. Next, this is taken out, put into a mold, and cured by a conventional method (either left to stand or heated and cured at about 50° C.) to obtain the desired insulating inorganic foam.

The following table shows the results of comparing the performance of this product with commercially available A, L, and C products.

〔remarks〕

*1 In the case of the present invention, the specific gravity can be freely changed according to the purpose of use as shown in 1.

*2 In the case of the present invention, the heat insulation properties can be freely changed depending on the quality of the protein-based air entraining agent, the stirring conditions, and the size of the closed cells.

(If specific gravity is set to 7:tO,I, 0.03kc
al/mh"c) As is clear from the table above, in the case of the present invention, urethane foam, which is weak like paper, is out of the question in terms of mechanical strength (compressive strength, bending strength), and insulation It is significantly superior to A, L, and C, which are recognized for their excellent strength as a material, and is significantly superior to A, L, and C in terms of heat insulation and water resistance, and is comparable to urethane foam, which is an organic material. It has comparable characteristics.

Example 2゜In this example, the protein-based air entraining agent supply mechanism 1 is
This example differs from Example 1 in that it is configured as shown in the figure, and other conditions and performance results are the same as Example 1.

That is, in this embodiment, a compressed air supply source 2, an aqueous solution of protein-based air entraining agent M, and a tank 14 are provided, respectively, and the compressed air supply source 2 is connected to the tank 14 by a pipe P7 via an adjustment/switching valve (4). Then, the pipe PS selectively communicates with the closed cell generation treatment device 7, and the oval 14 is connected with the closed cell generation treatment device 7 through the pump 15 through a pipe P9 to provide a protein-based air entrainment agent supply mechanism. 1, in which V5 and v6 are control valves provided in the pipes P6 and Pg, respectively, and Pe is a convergence pipe for compressed air and a protein-based air entraining agent aqueous solution.

In this embodiment, when the valve V4 is switched to the pipe Pe side, the compressed air and the protein-based air entraining agent solution are mixed in the tank 14, and the valve V4 is switched to the pipe Pe side.
If the switch is switched to the side, the compressed air and the protein-based air entraining agent solution are merged and mixed at the merge pipe P6.

In addition, in each of the above embodiments, an example was explained in which the merging pipe 10 was provided on the inlet side of the closed bubble generation processor 7, but in Embodiment 1, each pipe P3, P4, P5 was In Example 2, each of the pipes Pa and P9 was directly connected to the inlet side (filling side of the coarse particle group 11a) of the closed-cell generation treatment device 7 (a pipe of M configuration may also be adopted; In that case, it is preferable to provide a mixing chamber (not shown) in the processor 7 before the separate chamber 10a.

(Effects of the Invention) As is clear from the above detailed description, according to the present invention, countless fine closed cells of uniform size can be reliably formed and imparted to a heat insulating inorganic foam. A, L, and C have no water absorption properties because they can reliably prevent the formation of open cells that promote water absorption.

It has excellent strength without the risk of breaking or cracking in cold environments caused by water absorption.

It is capable of maintaining a very useful and remarkable effect without reducing the desired heat insulating effect, and since each closed cell can be formed to have a uniform size, it is capable of maintaining a uniform heat insulating effect. It is.

Also, according to the present invention! ! A: Crushed foam is extremely lightweight, so when it is applied to areas that require insulation such as the roofs of buildings, rooftops, and refrigerated cars, it has the advantage of significantly reducing the weight burden on buildings and refrigerated cars. is.

[Brief explanation of drawings]

The drawings show embodiments of the apparatus used in the present invention; FIG. 1 is a simplified explanatory diagram of the first embodiment, and FIG. 2 is a simplified explanatory diagram of the second embodiment. 1... Protein-based air entrainment agent supply mechanism, 7... Closed cell generation processor, 11a ・11b ・llc ・
11d...Coarse grain group, 12...Slurry storage/stirring tank. Patent Applicant Hi-Wall Co., Ltd. Same as above Katsu Minegakiuchi Same as above Application Kan procedure ne "n main gate (spontaneous) November 11, 1985 1985 Patent application No. 230541 2, name of invention Insulating inorganic foam with closed cells Relationship between the manufacturing method of the body, its equipment 3, and the case of the person making the amendment Applicant: 4-4 Hirano-cho, Higashi-ku, Osaka (Sakai Usa Building) High Wall Co., Ltd. (2 others) 4, Agent 5, Amendment Contents of amendments to the old claims and detailed description of the invention (1) The description of the claims section is amended as follows: [2. Claims (1) Cement, plaster, When producing a heat-insulating inorganic foam by adding a protein-based air entraining agent to a slurry consisting of silica sol, other inorganic curable substances, aggregates, and Asufful, the above-mentioned protein A system air entraining agent, water and compressed air are appropriately introduced into the processing device and passed through, and then supplied into the slurry, stirred, and then cured according to a conventional method. (2) A method for producing a heat-insulating inorganic foam comprising: (2) a protein-based air-entraining agent, water and compressed air are each introduced into a closed-cell generation treatment device and passed through; A method for producing a heat insulating inorganic foam having closed cells as described in item (3), characterized in that a protein-based air entraining agent aqueous solution and compressed air are both introduced in a mixed state into a closed cell generation treatment device and passed through. A method for producing a heat insulating inorganic foam having closed cells according to claim (1). (4) Introducing a protein-based air entraining agent aqueous solution and compressed air separately into a closed cell generation treatment device. A method for producing an insulating inorganic foam having closed cells according to claim (1), characterized in that the inorganic foam is passed through a protein-based air entraining agent supply mechanism and an inorganic cured rubber asphalt aqueous emulsion. Containment of slurry made by adding water and an asphalt-based aqueous emulsion such as
Between the j2 stirring tank, a large number of coarse and fine grains made of glass beads, etc. of multiple types of different particle sizes are divided and stored in a J: sea urchin container, sequentially from the coarse grain group to the fine grain group. At the same time, a closed cell generation treatment device configured to allow fluid to flow through the coarse granule group is arranged, and the protein-based air entraining agent supply V1 structure is communicated with the coarse granule group side of the closed cell generation treatment device. An apparatus for producing an insulating inorganic foam having closed cells, characterized in that the processed material in the closed cell generation treatment device can be supplied into a slurry storage/stirring tank. (6) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to separately supply the protein-based air-entraining agent, compressed air, and water to the closed-cell generation treatment device. An apparatus for producing a heat insulating inorganic foam having closed cells as described above. (7) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to separately supply the protein-based air-entraining agent aqueous solution and the compressed air to the closed-cell generation treatment device. An apparatus for producing an insulating inorganic foam having closed cells. (8) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to supply a mixture of the protein-based air-entraining agent aqueous solution and compressed air to the closed-cell generation treatment device. An apparatus for producing a heat insulating inorganic foam having closed cells as described above. 2. Amend "1 aggregate and 1 aggregate and asphalt-based aqueous emulsion such as asphalt aqueous emulsion, rubber asphalt aqueous emulsion, etc." in page 7 line 8 and page 17 line 17 of the specification. . 3. "Silica sand No. 7 1" on page 10, lines 14-15 of the specification
00 parts," followed by "Asphalt aqueous emulsion 20
Insert ``.

Claims (8)

[Claims] (1) A slurry made by mixing cement, gypsum, silica sol, and other inorganic hardening substances with aggregate and water,
When producing a heat insulating inorganic foam by adding a protein-based air entraining agent, a fine and uniform closed-cell generating treatment device is used to appropriately introduce the protein-based air entrainment agent, water and compressed air into the treatment device. A method for producing a heat insulating inorganic foam having closed cells, which comprises introducing and passing through the slurry, supplying the slurry, stirring, and then curing according to a conventional method. (2) Thermal insulation with closed cells according to claim (1), characterized in that the protein-based air entraining agent, water, and compressed air are each introduced into a closed cell generation treatment device and passed through. Method for producing inorganic foam. (3) Having closed cells according to claim (1), characterized in that a protein-based air entraining agent aqueous solution and compressed air are mixed together and introduced into a closed cell generation treatment device and passed through. Method for producing inorganic insulating foam. (4) A heat-insulating inorganic material having closed cells according to claim (1), characterized in that the protein-based air entraining agent aqueous solution and the compressed air are separately introduced into a closed cell generation treatment device and passed through the device. Method of manufacturing foam. (5) Between the protein-based air entrainment agent supply mechanism and the storage/stirring tank of the chiller, which is made by adding aggregate and water to an inorganic hardening substance, glass beads, etc. of multiple sizes with different particle sizes are installed. A closed cell generation treatment device comprising a container in which a large number of coarse particles are divided and housed in order from a group of coarse particles to a group of fine particles, and a fluid can flow through the group of coarse particles. is arranged so that the protein-based air entrainment agent supply mechanism is communicated with the coarse particle group side of the closed-cell generation treatment device, and the processed material in the closed-cell generation treatment device can be supplied into the slurry storage/stirring tank. 1. An apparatus for producing a heat insulating inorganic foam having closed cells, characterized in that: (6) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to separately supply the protein-based air-entraining agent, compressed air, and water to the closed-cell generation treatment device. An apparatus for producing a heat insulating inorganic foam having closed cells as described above. (7) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to separately supply the protein-based air-entraining agent aqueous solution and the compressed air to the closed-cell generation treatment device. An apparatus for producing an insulating inorganic foam having closed cells. (8) Claim (5) characterized in that the protein-based air-entraining agent supply mechanism is configured to supply a mixture of the protein-based air-entraining agent aqueous solution and compressed air to the closed-cell generation treatment device. An apparatus for producing a heat insulating inorganic foam having closed cells as described above.