JP2006335636A - Method for manufacturing inorganic foaming board material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of manufacturing an inorganic foaming board material homogeneously and with high productivity. <P>SOLUTION: The method for manufacturing the inorganic foaming board material comprises: a molding block formed in a suitable dimension profile by an iron or non-ferrous metal material so as to open and close in a longitudinal direction and is formed to be a halved mold having a peel layer formed in the whole inside thereof; a heating means capable of heating and keeping this molding block at 100°C or more; and a process in which siloxane having the viscosity of 1-10 P and a large molar weight concentrated solution of a silanol salt are coated on the whole inside surface of the molding block and are heated and foamed by 5-30 times. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing an inorganic foamed board, and more specifically, production of an inorganic foamed board that can be produced with uniform foaming and high productivity using a siloxane and silanol salt multimolecular weight solution. Regarding the method.

  Conventionally, heat insulation materials for interiors of buildings and facilities, and heat insulation materials for air conditioning equipment or equipment are lightweight and inexpensive and have excellent heat insulation properties. Therefore, synthetic resin materials such as polystyrene, polyethylene, polyurethane, and phenol are foamed. Synthetic resin foam board materials are used mainly.

  However, along with the recent increase in environmental purification, these synthetic resin foam board materials cannot be discarded after use, and must be specially incinerated with reliable separation, and the cost of these synthetic resins is further increased. Foamed board materials, etc., when used in a fire, generate a large amount of smoke and harmful gases along with a severe fire, and in the event of a fire in a building or facility, many lives are lost, especially in aging. At the same time, there is concern that the danger will increase further.

  For this reason, there has been a strong demand for the development of heat insulating materials for interior heat insulating plates and air conditioning equipment that have heat resistance, incombustibility, and heat insulating properties as well as disposal. Therefore, the inventors dissolved natural oxides such as volcanic ash and shirasu, or silicon oxide contained in large amounts in inorganic industrial waste such as coal ash and foundry waste sand with an alkali agent to form sodium silicate, Inorganic foamed plate material that retains heat resistance and nonflammability as well as excellent heat insulation properties by heat-foaming a siloxane and silanol salt multimolecular weight solution, which has been converted into a polymolecular weight by the condensation action of the silanol group, in a sealed container Have been able to form, and many experiments have been repeated for practical use.

Thus, the siloxane and silanol salt multi-molecular weight solution is a low-viscosity aqueous solution whose composition and properties are such that the solid content of siloxane and silanol salt is about 20 to 25% by weight and water is about 75 to 80% by weight. And, a foamed structure of about 50 times is produced by heating at 100 ° C. or higher.
Therefore, when forming an inorganic foamed board having the required width, length and thickness, the volume corresponding to the ratio of the foaming ratio to the capacity of the inorganic foamed board in the forming mold of the inner dimension to be formed. Peeling from the inner surface of the mold frame because it is sealed and heated, and the internal pressure associated with heat foaming is applied and it is firmly fused to the inner surface of the mold frame due to the heat-fusibility created by heat foaming. In order to facilitate die cutting, it is essential to form a release layer made of a tetrafluoroethylene material on the inner surface of the molding frame.

  Therefore, the siloxane and silanol salt multi-molecular weight solution injected into the mold frame at a required volume ratio is injected in a state of being stored at a required depth on the bottom surface of the mold frame, and heating for heating foaming is not performed. Since heating is appropriately performed from the outer surface of the mold by heating means, the heat receiving efficiency to the injected siloxane and silanol salt multi-molecular weight solution is transmitted through the mold and the release layer, so the heat receiving efficiency is significantly reduced. In addition to requiring a large heating capacity for heat foaming, heat foaming is performed from the side of the inner surface of the mold frame that contacts the release layer, and heat insulation is accompanied by this heat foaming, and the siloxane stored by injection is stored. In addition, heat transfer to the middle layer and the upper layer of the silanol salt multi-molecular weight solution is hindered, resulting in inhomogeneous heating foaming, and a problem that it takes a very long time to form the whole foam was discovered.

  The present invention has been made in view of such problems, and the present invention produces an inorganic foamed board material that retains heat resistance, nonflammability, and excellent heat insulation in addition to discardability with uniform and high productivity. It is to provide a manufacturing method.

  The technical means used by the present invention in order to solve the above-mentioned problem is made of ferrous or non-ferrous metal material, and can be opened and closed in half along the length direction with the required width, length and depth. In addition, by using a mold having a release layer formed over the entire inner surface and a heating means capable of heating and maintaining the mold at a required temperature, the moisture of the siloxane and silanol salt multi-molecular weight solution is dehydrated and concentrated. Then, the siloxane and silanol salt multi-molecular weight concentrated solution whose viscosity is concentrated to 1 to 100,000 poises are applied to the inner surface of the molding to the required thickness, and the halves are closed and fixed together, thus heating means In the method for producing an inorganic foamed plate material, the foaming ratio is 5 to 30 times by heating at 100 ° C. or more, and the foaming molding is homogeneous and short over the whole.

The present invention uses the technical means as described above, and the siloxane and silanol salt multi-molecular weight concentrated solution used has a high viscosity of 1 to 100,000 poises, and at the same time, maintains high adhesiveness. It can be easily applied to the inner surface of the mold at the required thickness. This coating thickness is foamed at a foaming ratio of 5 to 30 times, so it is applied very thinly. Heat transmitted through the siloxane and silanol salt multi-molecular weight concentrated solution applied relatively thinly, and received by the siloxane and silanol salt multi-molecular weight concentrated solution. Similarly, since it is permeated and receives heat, an inorganic foamed plate material in which the entire surface is uniformly foamed is formed in a very short time.
In addition, the foamed inorganic foam board is formed in a mold that can be opened and closed in half along the length direction, and a peeling layer is formed on the entire inner surface. It is made easy and can be manufactured with high productivity.

  An appropriate heating means is a mold made of a ferrous or non-ferrous metal plate and having a required width, length and depth and capable of opening and closing in the longitudinal direction, and a mold having a release layer formed on the entire inner surface. A siloxane and silanol salt multi-molecular weight concentrated solution having a viscosity of 1 to 100,000 poise is applied to the entire inner surface of a mold configured to be heated and maintained at an appropriate temperature of at least 100 ° C. After coating, the whole is heated to an appropriate temperature to form a foam with a foaming ratio of 5 to 30 times in a uniform and short time.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a mold 1 used in the present invention. In order to efficiently transmit the heat to the inside, the heat conductivity is high, and sufficient foaming pressure is applied to increase the foam structure strength. Non-ferrous metal material is used.
In such a case, specific examples of the non-ferrous metal material include stainless steel and aluminum.

  And although this shaping | molding die 1 is formed with a required width | variety, length, and depth, a specific dimension is determined according to the intended purpose of the inorganic foam board 4 formed, The siloxane and silanol salt multi-molecular weight concentrated solution 3 used in the present invention is foamed 5 to 30 times upon heating foaming, and has a strong internal pressure applied to enhance the foam structure strength. Since fusing property is also created, the foamed inorganic foamed plate material 4 is firmly fused with the inner surface of the mold 1 and it is difficult to remove the mold from the mold 1.

For this reason, the mold 1 is formed to be openable and closable by the half molds 1A and 1A along the length direction, and the release layer 1B is firmly applied and formed over the entire inner surface of the mold 1. .
In such a case, the opening / closing means of the half molds 1A, 1A are connected with a suitable number of hinges (not shown) on one side of the half molds 1A, 1A, and a locking tool (not shown) on the other side. ) Are provided. Further, it is preferable to use tetrafluoroethylene as a material for forming the release layer 1B.

The mold 1 thus formed uses heating means 2 for foam formation. The heating means 2 is not particularly limited, and the mold 1 is heated to an appropriate temperature of substantially 100 ° C. or more to heat the siloxane and silanol salt multi-molecular weight concentrated solution 3 coated in the mold 1. Any material having a heating capacity for foaming can be used.
And as a heat source used for the heating means 2, what is heated from the outer peripheral surface of the mold 1 using a flame, an electric heater, heated air, or the like is used, and the mold 1 is made of iron or non-ferrous metal. For this reason, the mold 1 itself may be heated by dielectric heating or high frequency heating.

FIG. 2 is an explanatory drawing of application of a siloxane and silanol salt multi-molecular weight concentrated solution, and the greatest technical feature of the present invention is an inorganic foamed plate material that retains excellent heat insulation in addition to discardability, heat resistance and nonflammability The siloxane and silanol salt multi-molecular weight solution capable of forming a foam is formed uniformly and in a short time.
In order to achieve this, the siloxane and silanol salt multi-molecular weight concentrated solution 3 is dehydrated and concentrated to give a high viscosity and high tackiness with a viscosity of 1 to 100,000 poise, and a siloxane and silanol salt multi-molecular weight concentrated solution 3 is obtained. The siloxane and silanol salt multi-molecular weight concentrated solution 3 is applied to the entire inner wall surface of the mold 1 in a thin film shape, whereby the heating energy from the outer surface of the mold 1 by the heating means 2 is changed to the mold 1 and the release layer 1B. The foam is transmitted to the inside of the thin film applied through the film and foamed, and foams are formed almost simultaneously on the entire surface of the mold 1, so that foaming is formed uniformly and in a short time.

In such a case, the siloxane and silanol salt multi-molecular weight concentrated solution 3 heats the water content of the siloxane and silanol salt multi-molecular weight solution at a temperature of 100 ° C. or less to evaporate the water content to about 55 to 35% by weight. When the coating is a thin film, the viscosity is about 1 to 30,000 poise, and when a thick film is required for the coating, the viscosity is about 30,000 to 70,000 poise. A degree is convenient.
By the way, in use as a heat insulating plate material for building, in foam formation of width 90 cm length 180 cm thickness 4 cm, when the expansion ratio is 10 times, the coating thickness is about 1.2 mm, and when the expansion ratio is 20 times A coating thickness of about 0.6 mm is possible.

  FIG. 3 is a cross-sectional explanatory view showing the state of heating and foaming. After the siloxane and silanol salt multi-molecular weight concentrated solution 3 is applied in a required volume in the mold 1, the half molds 1A and 1A are closed and heated. Is applied to produce an inorganic foamed plate material 4 which is foamed at a foaming ratio of 5 to 30 times.

  Determine the width, length, and depth of the mold appropriately, apply siloxane and silanol salt multi-molecular weight concentrated solution on the entire inner surface with a coating amount corresponding to the foaming ratio with respect to the inner volume, and heat By foaming, it is possible to form inorganic foamed plate materials of various sizes and shapes.

  It is sectional explanatory drawing of a shaping | molding die.   It is application | coating explanatory drawing of a siloxane and silanol salt multimolecular-weight concentrated solution.   It is sectional explanatory drawing which shows a heating foaming state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold 1A Half type 1B Peeling layer 2 Heating means 3 Siloxane and silanol salt high molecular weight concentrated solution 4 Inorganic foam board

Claims (1)

  A mold having a required width, length, and depth using a ferrous or non-ferrous metal material, and a mold that is openable and closable in the length direction, and in which a release layer is formed on the entire inner surface thereof. And a heating means capable of heating and holding the mold at a temperature of at least 100 ° C., and foaming the siloxane and silanol salt high molecular weight concentrated solution having a viscosity of 1 to 100,000 poise on the entire inner surface of the mold with respect to the inner volume of the mold It is characterized in that an inorganic foamed plate having a foaming ratio of 5 to 30 times is formed into a foam in a homogeneous and short time by applying and heating with a coating amount corresponding to the ratio amount ratio. Manufacturing method of inorganic foam board.

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