JP2006274232A - Method for producing heat-insulation board by siloxane and silanol salt solution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for uniformly producing a heat-insulation board for interior use having excellent heat-insulation, light weight and disposability in addition to fire resistance and nonflammability in high productivity. <P>SOLUTION: The mold for spray cast molding is made of iron or non-ferrous metal, has prescribed width, length and depth, has a releasing layer on the whole inner face, is splittable into two along the length, and has a pouring hole on one wall face of the width direction and an exhaust hole on the opposite wall surface. The mold is heated at a prescribed temperature with a proper heating means and high-molecular siloxane and silanol solution is injected into the mold by spraying under pressure at a prescribed volume ratio to effect the quick and uniform expansion forming. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing a heat insulating plate material that retains both fire resistance, non-flammability, excellent heat insulation, light weight, and discardability by using an aqueous siloxane and silanol salt solution.

  In order to maintain a comfortable and sanitary living space or building space in office buildings, offices, stores, theaters, hotels, etc. as well as residential buildings at present, air conditioning equipment and air conditioning equipment are attached. Air conditioning equipment and air conditioning equipment consume enormous heat energy, and the residential buildings and facility buildings are in contact with the outside air with a very large proportion of the roof, walls, and windows. Moreover, since the heat energy supplied to maintain the hygienic living space and building space is also easily dissipated and leaked, the maintenance cost is forced to be large in combination with the further supply of heat energy.

  For this reason, in residential buildings and facility buildings, outer wall plates made of ceramics or inorganic materials that are fire-resistant or non-flammable and retain water resistance and durability are used on the outer wall, and interior materials have dimensional accuracy. Highly new building materials are used, and on the back of the interior material, there are exclusively heat insulating board materials for interiors made of foamed synthetic resin material such as polystyrene, polyethylene, polyurethane or phenol resin that is lightweight, inexpensive and excellent in heat insulation. in use.

For this reason, in today's residential buildings and facility buildings, etc., the airtightness has been remarkably improved. On the other hand, in these residential buildings and facility buildings, combustible daily necessities or products and products made of paper materials and fiber materials are present. Because it is stored in large quantities, once a fire breaks out, combustible daily necessities, products, or commodities easily burn, and these synthetic resin interior insulation plates generate toxic gases and soot along with intense flames. There are many accidents in which these buildings fill up in highly sealed buildings and facilities and lose their precious lives every day.
In particular, in addition to the rise in residential buildings in urban areas in recent years, along with the aging of residents, there is a strong demand for the use of fire-resistant and non-combustible materials for interior insulation board materials.

  In view of this situation, the inventors previously dissolved natural oxides such as volcanic ash and shirasu, coal ash, and calcined sludge, etc., into silicon silicate by dissolving silicon oxide contained in large amounts in inorganic industrial waste with an alkaline agent. In addition, the siloxane and silanol salt multi-molecular weight solution which has been made into a multimolecular weight by the condensation action of the silanol group has a solid content of siloxane and silanol salt of about 20 to 25% by weight and water of about 75 to 80% by weight. It has been found that a foamed structure is formed with the evaporation of its water content by heating at least 100 ° C., and that a high heat-fusibility is created with heating. In a mold that has a flat box shape with a length and depth using a metallic material and that has a closed lid, siloxane and silanol salt are dissolved at a ratio that takes into account the expansion ratio. And then heated at the required temperature, thereby succeeding in producing a heat insulating plate material that has excellent heat resistance as well as fire resistance and non-flammability, and is lightweight and inexpensive. It is disclosed in the issue.

  However, in the method for producing a heat insulating plate by means of such means, the interior heat insulating plate is 90 cm wide and 180 cm long and has a thickness ranging from 4 to 30 cm, so the ratio corresponding to the expansion ratio in the mold The heat receiving for heating and foaming of the siloxane and silanol salt multimolecular weight solution injected in a quantity is heated through a mold in which the mold is heated by flame or electric heating, or by electromagnetic induction heating or high frequency heating. However, this siloxane and silanol salt multi-molecular weight solution creates a high fusing property with heat foaming and adheres firmly to the mold, making it impossible to remove the mold. It is necessary to form a layer on the entire inner surface of the mold.

  Therefore, the heat receiving for heating and foaming of the siloxane and silanol salt multi-molecular weight solution injected into the mold having the release layer is received through the mold and the release layer, so that the heating efficiency is extremely poor. In order to achieve sufficient heating and foaming, not only a heating means with an extremely large heating capacity is required, but also the siloxane and silanol salt multi-molecular weight solution on the surface in contact with the release layer receives heat and foaming is generated, and this heating is performed. The heat-insulating action is caused by foaming, and the heat reception of the inner and upper siloxane and silanol salt multi-molecular weight solutions is remarkably hindered. It is.

  As a result of further studies by the inventors in view of such problems, the siloxane and silanol salt multimolecular weight solution has a solid content of siloxane and silanol salt of about 20 to 25% by weight and water of about 75 to 80% by weight. Since it is in the form of an aqueous solution with low viscosity, it can be sprayed in the form of fine droplets with a relatively low pressure, and the fine-drop siloxane and silanol salt multi-molecular weight solution has an extremely large surface area ratio for receiving heat. It was clarified that heat foaming can be performed uniformly in a short time due to the heat receiving efficiency, and that a heat insulating plate material having a desired shape can be efficiently produced, leading to the present invention.

  The present invention provides a production method capable of producing a heat insulating plate material having excellent heat insulating property, light weight property and waste property in addition to fire resistance and non-flammability from a siloxane and silanol salt solution uniformly and with high productivity. There is.

  The technical means used by the present invention to solve the above-mentioned problems is made of a ferrous or non-ferrous metal material, has a required width, length and depth, and is halved along the length direction. It is formed to be openable and closable, and a release layer is formed on the entire inner surface. In addition, an injection hole having an appropriate hole diameter for spraying siloxane and silanol salt solution is provided at an appropriate position on one side wall surface in the width direction. In order to disperse and fill the siloxane and silanol salt multi-molecular weight solution to be heated and spray-injected and to evacuate the internal air, the micropore size for exhausting the steam that is evaporated by heating is appropriately positioned on the wall surface facing the surface. Spray injection mold provided with exhaust holes, and heating using a heat source by flame, electric heating, heated air, dielectric heating or high frequency heating so that the spray injection mold can be heated and held at an appropriate temperature of 100 ° C. or higher A mixing valve for mixing the siloxane and silanol salt solution with the pressurized air to be blown is provided on the front end side of the blower pipe connected to the stage and a pressurized blower that can blow the required blowing pressure and blowing amount. In addition, the injection hole of the spray injection mold is provided with a pressure spray means provided with an orifice capable of being attached to the injection hole of the spray injection mold and provided with a spray injection, and is heated to an appropriate temperature and closed by a heating means. Further, a siloxane having an orifice of a pressure spraying means and having a solid content of siloxane and silanol salt of 20 to 25% by weight and water of 75 to 80% by weight and a molecular weight of about 4,000 to 8,000. And the silanol salt multi-molecular weight solution are spray-injected under pressure at a volume ratio corresponding to the expansion ratio, and thus the siloxane and silanol salt in the form of fine droplets are presumably injected throughout the spray-injection mold. The amount solution was distributed filling consists in construction to foam molding to a short time 且均 quality spray casting mold in a high heat efficiency.

  The present invention uses the technical means as described above, and the spray injection mold is formed by using a ferrous or non-ferrous metal material and can be opened and closed by a half mold along its length direction, and the spray injection mold Since the release layer is formed over the entire inner surface of the interior, the interior heat insulating plate material that is formed by heating and foaming and applying a large internal pressure is also provided by opening the half mold of the spray injection mold. Die-cutting can be done easily.

  An injection hole having an appropriate hole diameter is provided at an appropriate position on one side wall surface in the width direction of the spray injection molding die, and an exhaust hole having a fine hole diameter for exhausting excess water vapor evaporated by heating at an appropriate position on the opposite wall surface. Therefore, when siloxane and silanol salt multi-molecular weight solution is pressurized and injected from the injection hole into the spray injection mold heated and held at the required temperature, the air in the spray injection mold is discharged from the exhaust hole. Fine droplets of siloxane and silanol salt multi-molecular weight solution that are exhausted and sprayed are dispersed and injected throughout the spray injection mold, and because they are fine droplets, the heat-receiving surface area ratio is extremely large, so they are efficiently received in a short time. The spray injection mold is uniformly heated and foamed.Furthermore, each of the fine droplets is joined together with heat foaming to create a fusion property, and the heat insulating plate material for the interior has a shape corresponding to the spray injection mold. It is made.

  It can be opened and closed with a required width, length and depth of a ferrous or non-ferrous metal material, and can be opened / closed in half along the length direction, and a peeling layer is formed on the entire inner surface. A spray injection mold having an injection hole with an appropriate hole diameter provided at an appropriate position on the wall surface and an exhaust hole with a fine hole diameter provided at an appropriate position on the opposite side wall surface is used as a flame, electric heat, heated air, or dielectric heating. The siloxane and silanol salt multi-molecular weight solution is heated and held at a required temperature by a heating means such as high-frequency heating, and is pressurized in a droplet form from the injection hole of the spray injection mold at a volume ratio corresponding to the expansion ratio. It is spray-injected and heat-foamed in a short time and homogeneously to produce an interior heat insulating plate.

  The embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of a spray injection mold 1 and FIG. 2 is an explanatory view of the same cross section. The spray injection mold 1 sprays thermal energy in a heating means 2. For example, iron or non-ferrous metal is used as the material because it can be efficiently transmitted into the injection mold 1 and the strength against internal pressure during heating and foaming can be maintained. Examples of such materials include stainless steel and aluminum.

  The interior heat insulating plate 4 which is the intended use of the present invention has a general size of 90 cm in width and 180 cm in length, and a thickness of about 4 to 6 cm depending on the specific place of use. Since extremely thick objects are also used, the size of the spray injection mold 1 is made so that it can be formed in its internal dimensions.

In addition, it is important to note that the interior heat insulating plate 4 formed by heating and foaming the siloxane and silanol salt high molecular weight solution 3A to be injected by pressure spraying into the spray injection mold 1 has a large width and length, and Since the thickness is also relatively thick, a large internal pressure corresponding to the expansion ratio is added to maintain the foam structure strength that can be used for practical use. Therefore, inability to peel off or die-cut is also invited.
Thus, the release layer 1A is firmly formed on the entire inner surface of the spray injection mold 1, and the foamed interior heat insulating plate 4 can be easily removed from the mold. It is comprised by the half type 1B and 1B so that opening and closing is possible. There are no particular restrictions on the opening / closing means of the half molds 1B and 1B in such a case, but in general, the half molds 1B and 1B in the length direction are connected to each other by a hinge 10B, and are mutually connected to the other side in the length direction. An appropriate locking tool (not shown) for closing and locking the half molds 1B and 1B may be provided.

  Furthermore, in the present invention, the siloxane and silanol salt multimolecular weight solution 3A for foam formation is injected by pressure spraying into the spray injection mold 1, so that an appropriate hole diameter is provided at an appropriate position on one side wall surface in the width direction. The injection hole 1C is provided, and at the appropriate position on the other wall surface opposite to the injection hole 1C, a spray injection mold is used for spray injection of the siloxane and silanol salt multimolecular weight solution 3A to be pressure spray injected. The fine droplets are made of fine pores so that the fine droplets injected by spraying the air in 1 are dispersed and injected over the whole of the spray injection mold 1 and for exhausting excess water vapor evaporated during heating and foaming. A number of exhaust holes 1D are appropriately formed.

  Here, the siloxane and silanol salt multi-molecular weight solution 3A used in the present invention once contains silicon oxide contained in a large amount in inorganic natural products such as volcanic ash and shirasu, and coal ash or cast waste sand and incineration sludge. In addition to elution with an alkali agent to form sodium silicate, the formation of a foamed structure due to the evaporation of moisture and the creation of heat-fusible properties, the molecular weight is reduced to about 4,000 by the condensation action of the silanol groups contained. It is an aqueous solution in which the molecular weight is increased to about 8,000 and the solid content of siloxane and silanol salt is about 20 to 25% by weight and water is about 75 to 80% by weight.

The spray injection pressure from the injection hole 1C is about 55 to 60 kgf / cm ² when the interior heat insulating plate 4 formed by heating and foaming is 5 times foamed. In some cases, approximately 15 to 17 kgf / cm ² , and in the case of 20-fold foaming, it is considered to be approximately 4 to 6 kgf / cm ^2. Therefore, the spray injection pressure may be higher than the internal pressure.
As a matter of course, when the hole diameter of the injection hole 1C is increased, not only the injection pressure is required to be high, but also the trace of the injection hole 1C remains in a part of the foamed interior heat insulating plate material 4. It is desirable that the 1C hole diameter is 6 to 10 mm at most.

The spray injection mold 1 thus formed is provided with heating means 2 for heating and holding at a temperature of at least 100 ° C. in order to heat and foam the siloxane and silanol salt multimolecular weight solution 3A to be spray injected.
As the heating source 2A in the heating means 2, flames, electric heaters, heated air, dielectric heating, high frequency heating, or the like can be used.

  That is, in the case of using a flame or heated air, as shown in FIG. 3, the inside of the furnace 2B having a sufficiently large storage capacity that can be adjusted to the required temperature by the flame or heated air is provided with a required interval. The spray injection mold 1 is arranged on a placement shelf or the like (not shown) that can be placed so that the injection hole 1C is aligned with the injection hole 2C opened on one side of the heating furnace 2B, and then required. The siloxane and silanol salt multi-molecular weight solution 3A is injected by pressure spray injection into the injection hole 1C of each spray injection mold 1 heated to a temperature of 1 m.

On the other hand, in the case of using an electric heater, it is possible to attach a heating frame 2D including an electric heater around the outer periphery of the spray injection mold 1 as shown in FIG. It is also possible to incorporate a dielectric or high frequency generation mechanism in the heating frame 2D and heat the spray injection mold 1 itself made of iron or a non-ferrous metal material.
The heating temperature for heating and foaming in the present invention may be from 100 ° C. to 900 ° C., but approximately 200 to 350 ° C. is sufficient from the viewpoint of productivity and safety.

  FIG. 5 is an explanatory diagram of the process of the present invention, in which the siloxane and silanol salt multimolecular weight solution 3A is connected to a pressure blower 3B connected to a pressurized air blower 3B capable of blowing a required pressure and air flow, The mixing valve 3D mixed with the pressurized air is mixed and the orifice 3E provided at the tip thereof is attached to the injection hole 1C of the spray injection mold 1 and the opening / closing provided at the front of the orifice 3E. The required volume is sprayed by opening and closing the valve 3F, and the pressure spraying means 3 is constituted by these.

  In such a case, the heat insulation for interiors in which the expansion ratio and the internal pressure are determined by the ratio of the injection volume of the siloxane and silanol salt polymolecular weight solution 3A injected by pressure spraying to the internal volume of the spray injection mold 1 and the foam is formed. Since the basic physical properties of the plate material 4 are also determined, in order to manage the injection volume of the siloxane and silanol salt multimolecular weight solution 3A, a measurement scale is given to the hopper 3G in which the siloxane and silanol salt multimolecular weight solution 3A is stored. It is desirable to keep it.

  The present invention is not only capable of producing heat-insulating plate materials, but also inorganic plate materials that require fire resistance and non-flammability, as well as inorganic porous materials such as sand, coal ash, and shirasu in siloxane and silanol salt multi-molecular weight solutions. By mixing these, it becomes possible to produce a wide range of civil engineering and building board materials.

  It is a sketch of a spray injection mold.   It is a section explanatory view of a spray injection mold.   It is explanatory drawing of the heating means by a flame or heating air.   It is explanatory drawing of the heating means by an electric heater.   It is process explanatory drawing of this invention.   It is a sketch of the heat insulating board material for interior.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spray injection form 1A Release layer 1B Half split 1C Injection hole 1D Exhaust hole 10B Hinge 2 Heating means 2A Heating source 2B Heating furnace 2C Injection hole 2D Heating frame 3 Pressure spraying means 3A Siloxane and silanol salt high molecular weight solution 3B Addition Pressure blower 3C Blower pipe 3D Mixing valve 3E Orifice 3F On-off valve 3G Hopper 4 Heat insulation plate for interior

Claims (3)

  A peeling layer is formed on the entire inner surface of a ferrous or non-ferrous metal material with the required width, length, and depth, and can be opened and closed in half along the length direction. A spray injection mold in which an injection hole having an appropriate hole diameter is formed and an exhaust hole having a fine hole diameter is formed at an appropriate position on the opposite side wall surface is heated and held at a temperature of at least 100 ° C. by an appropriate heating means. After installing the orifice of the pressurized spraying means in which the siloxane and silanol salt multimolecular weight solution is mixed in the pressurized air to the injection hole, the required volume of siloxane and silanol salt multimolecular weight solution is sprayed and injected. A method for producing a heat insulating plate for interiors, characterized in that foam formation is sometimes and uniformly performed.   A heating furnace having a large capacity is maintained at a required heating temperature by a heating source comprising a flame or heated air, and injection holes are provided at appropriate intervals on one side of the heating furnace. The manufacturing method of the heat insulating board material for interiors of Claim 1 which is coordinated and heated in a heating furnace so that it may match | combine with this injection hole.   The heat insulating plate material for interior use according to claim 1, wherein the spray injection mold is heated by mounting a heating frame including an electric heater or dielectric heating or a high-frequency heating mechanism in the outer periphery of the spray injection mold. Production method.

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