JP2868578B2 - Insulation - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat insulating material.

[Conventional technology]

Conventionally, as a heat insulating material for a building, for example, a heat insulating material molded plate such as a styrofoam which is driven into a form that also serves as a concrete formwork, and urethane foam which is blown and formed on a concrete surface at a site are known. Have been.

However, organic insulation materials such as urethane foam and styrofoam that are installed on site have a thermal conductivity of 0.02 to 0.03.
(Kcal / mhr ° C.), which is very small, so that it exhibits excellent heat insulating performance, but has a problem that it is easily burnable because it is organic.

Because of this, due to unrestricted fire protection and strength issues,
For example, it is necessary to paste a flame-retardant material such as gypsum board on an organic heat-insulating material and make a decorative finish using this as a groundwork. There was a problem that it took time and effort.

As a heat insulating material that solves such a problem, a lightweight mortar such as a foamed mortar or a pearlite mortar is sometimes used as an inorganic heat insulating material.

[Problems to be solved by the invention]

Such an inorganic heat insulating material has the property of being difficult to burn, but has a thermal conductivity of 0.2 to 0.3 (kcal / mhr ° C), which is extremely high compared to an organic heat insulating material (0.02 to 0.03 kcal / mhr ° C). Due to the large size, there is a problem that the heat insulating performance is inferior to that of the organic heat insulating material.

For this reason, it is not only difficult to secure the target heat insulation performance, but also a considerable thickness is required to secure the performance.

The present invention has been made in order to solve the above problems, and can be wet construction in addition to the dry construction used as a molded plate, as a thermal insulation performance has a performance close to organic thermal insulation, Further, from the viewpoint of flame retardancy, an object of the present invention is to provide a heat insulating material having the performance of a conventional inorganic heat insulating material and having a feature of higher strength than a conventional heat insulating material.

[Means for solving the problem]

The heat insulating material according to claim 1, wherein the solid content of the synthetic resin emulsion is 3 to 50 parts by weight, the organic microballoons are 1 to 20 parts by weight, and the carbon fiber is 0.
It consists of a mixture of 3-5 parts by weight and inorganic microballoons 10-200 parts by weight, has a thermal conductivity of 0.06 kacal / mhr ° C, an air-dry specific gravity of 0.31, a moisture permeability of 0.315 g / m ² hmmHg, and a water absorption rate. Is 31.4
It is a volume% and absorbs moisture when the humidity is high in the room, and releases the moisture when the humidity is low in the room.

Here, with respect to 100 parts by weight of the cement, the solid content of the synthetic resin emulsion was determined to be 3 to 50 parts by weight. The adhesive performance was reduced at 3 parts by weight or less, and the fire resistance performance was reduced at 50 parts by weight or more. This is because the cost increases.

In addition, the use of 1 to 20 parts by weight of the organic microballoon with respect to 100 parts by weight of the cement is inferior in heat insulating performance when the amount is 1 part by weight or less, and deteriorates in fire resistance and strength when the amount is 20 parts by weight or more. Because it becomes.

Furthermore, carbon fiber 0.3 to 5 per 100 parts by weight of cement
The weight part is because the reinforcing effect of the matrix and the effect of preventing cracking due to shrinkage become low at 0.3 parts by weight or less, and at 5 parts by weight or more, the fiber becomes bulky and the workability is deteriorated, but the cost increases, This is because the reinforcement effect is not so much improved.

In addition, the use of 10 to 200 parts by weight of inorganic microballoons with respect to 100 parts by weight of cement increases the cost of other materials that are less expensive at 10 parts by weight or less, which increases the cost and improves the fire resistance. Because it does not contribute much,
If the amount is more than 200 parts by weight, the strength becomes brittle. In consideration of improvement of fire resistance, strength, cost, etc., the inorganic microballoon is desirably 10 to 100 parts by weight based on 100 parts by weight of cement.

Furthermore, the thermal conductivity is 0.06kacal / mhr ° C, and the air-dry specific gravity is 0.3
1.The moisture permeability coefficient is 0.315 g / m ² hmmHg and the water absorption is 31.4% by volume. Absorb,
This is because a function of releasing moisture when the humidity decreases in a room can be exhibited.

(Operation)

The heat insulating material according to claim 1 is, for example, a paste-like mixture in which a synthetic resin emulsion, carbon fibers, organic microballoons and, if necessary, a water-soluble resin, an antifoaming agent, an antifungal agent, etc. are mixed and kneaded. It is manufactured by mixing and kneading cement and inorganic microballoons.

This heat insulating material forms a seamless heat insulating layer by wet-working the structure body, so that heat conduction inside and outside the structure is effectively prevented and flame retardancy is improved.

The formation of a heat insulating layer by wet construction is performed by spraying a heat insulating material, which is a viscous fluid, on a concrete surface at a predetermined thickness at a site, or by applying a trowel, etc., and attaching the heat insulating material to the structure body. It is performed by

In a structure in which such a heat insulating layer is formed, the heat insulating layer itself has an appropriate water absorption rate even though the moisture permeability coefficient is small, so that when the humidity increases in a room, the heat insulating layer absorbs moisture, When the humidity is accumulated in the heat insulating layer and the indoor humidity decreases, moisture is released from the heat insulating layer, and the indoor humidity is automatically adjusted.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the structure of the present invention.
In the drawing, reference numeral 31 indicates a roof slab that is the structure body 33.

The roof slab 31 is supported by a beam 35 that is a structural body 33.

And, on the inner surface of the beam 35 and the lower surface of the roof slab 31,
A heat insulating layer 37 is formed. The heat insulating layer 37 formed on the lower surface of the roof slab 31 is, for example, 50-
It is formed about 60cm. This is to prevent a heat bridge, that is, heat from the outside from running around the ceiling surface and being conducted.

The heat insulating layer 37 is formed by attaching a heat insulating material, which is a viscous fluid, to the inner surface of the beam 35 and the lower surface of the roof slab 31.

This heat insulating material is composed of cement, a synthetic resin emulsion, carbon fiber, organic microballoons, water, a water-soluble resin such as a thickener and anti-dripping agent, an antifoaming agent, a fungicide, and an inorganic microballoon.

Portland cement is used as the cement.

Further, synthetic resin emulsions include, for example, acrylic, vinyl acetate, synthetic rubber, vinylidene chloride,
It is a vinyl chloride type or a mixture thereof.

 The carbon fiber has a fiber length of about 6 mm, for example.

Further, the organic microballoon has a particle size of, for example, 10 to 100 μm and a specific gravity of 0.04 or less. The particle size of the inorganic microballoon is, for example, 5 to 200
μm, and the specific gravity is 0.3 to 0.7.

The thickener is a water-soluble polymer compound such as methylcellulose, polyvinyl alcohol, and hydroxyethylcellulose.

Such a heat insulating material is composed of 28 parts by weight of a synthetic resin emulsion (6.3 parts by weight in terms of solid content), 2.6 parts by weight of carbon fiber, 24 parts by weight of an organic microballoon, 0.4 parts by weight of a water-soluble resin, and 137 parts of water.
It is manufactured by mixing and kneading 100 parts by weight of powder with 100 parts by weight of a semi-liquid mixture composed of parts by weight, a small amount of an antifoaming agent and an antifungal agent.

The powder is composed of 16 parts by weight of inorganic microballoons per 100 parts by weight of Portland cement.

The heat insulating material thus manufactured has properties as shown in the following table.

That is, the thermal conductivity is 0.06 (kcal / mhr ℃) and the raw specific gravity is 0.
54, air-dry specific gravity 0.31, bending strength 12.8 (kgf / cm ² ), compressive strength 14.7 (kgf / cm ² ), adhesion strength 6.2 (kgf / cm ² ), moisture permeability coefficient 0.315 (g / m ² hmmHg), The water absorption is 31.4 (%).

In the structure configured as described above, a heat insulating material, which is a viscous fluid, is sprayed on the surface of the structure body 33,
By wet construction such as filling the voids, for example, thickness 10-15
The heat insulating layer 37 of mm is formed.

Thus, the structure constituted as described above includes cement, a synthetic resin emulsion, an organic microballoon, carbon fiber, water, a water-soluble resin, an inorganic microballoon, A small amount of thickener, defoamer,
Since the heat insulating material mixed with a fungicide is wet-processed to form a seamless heat insulating layer 37, heat conduction inside and outside the structure can be effectively prevented, and flame retardancy can be improved. it can. Further, the heat insulating layer 37 formed in the structure body 33 has a large heat insulating performance, has good adhesion to the structure body 33, has a large strength of the heat insulating layer 37 itself, and has flame retardancy. The heat-insulating layer 37 itself can be used as a finishing surface as it is, or the heat-insulating layer 37 can be used as a base to directly apply a decorative finish such as painting, spraying, cross-attaching, and tile-attaching. For this reason, it can be easily applied to any shape, and the construction process can be greatly reduced, a large effective area (space) can be secured, and labor and cost can be greatly reduced. it can.

Furthermore, since the heat insulation performance can be improved, the occurrence of dew condensation can be reliably prevented.

In addition, the thermal conductivity of the heat insulating material formed as described above is 0.06 (kcal / mhr ° C.), which is lower than that of the organic heat insulating material (0.02 to 0.03 kcal / mhr ° C.). Since it is not so large, it can have almost the same heat insulating performance as the organic heat insulating material. This is because an air pocket is formed in the mortar because it contains an organic microballoon or an inorganic microballoon. Also like this. Since an air pocket is formed in the mortar, the raw specific gravity is 0.54 and the air-dry specific gravity is 0.31, so that a very light heat insulating material can be formed.

Further, since the heat insulating material is an inorganic heat insulating material containing a large amount of an inorganic material, the flame retardancy can be greatly improved as compared with the organic heat insulating material.

In addition, since the heat insulating material contains a synthetic resin emulsion and carbon fiber in the mortar, the internal bond becomes strong, and the compressive strength of the conventional rigid urethane foam (1.4 to 2.0)
kgf / cm ² ) or the compressive strength of polystyrene foam (2.5 to
3.0 kgf / cm ² ), the heat insulating material of the present invention has a compressive strength of 1
4.7kgf / cm ^2, bending strength 12.8kgf / cm ^2, and the it is possible to greatly improve the strength than before.

Furthermore, because it contains a synthetic resin emulsion,
6.2kgf / cm ² bond strength of insulation to concrete surface
Thus, integration of the heat insulating material with the concrete surface can be promoted, and peeling of the heat insulating material can be reliably prevented. For this reason, the insulation can be wet-laid, and it is difficult to perform the installation on the ceiling surface or the beam type, etc., which were difficult with the conventional construction method such as urethane foam spraying, board sticking, and dry construction with insulation boards. The installation of the heat insulating material in a building having many corners, corners, and the like, a circular building, and the like can be easily performed.

As described above, the heat insulating performance, flame retardancy, strength, and the like of the heat insulating material can be improved. There is no need to attach a flame-retardant material such as a board and apply a decorative finish using this as a base, which can greatly reduce the construction process for building a heat insulating structure, and achieve seamless construction. Therefore, the labor and cost can be significantly reduced in addition to the improvement of the heat insulation performance.

In addition, the heat insulating material can be a respiratory heat insulating material, and the automatic adjustment of the indoor humidity can be performed.

That is, while the moisture permeability coefficient of the heat insulating material is as small as 0.315 (g / m ² hmmHg), the water absorption rate is 31.4 (%), which has an appropriate water absorbing performance. The moisture is absorbed and accumulated in the heat insulating layer 37, and when the humidity in the room becomes low, the moisture is released from the heat insulating layer 37, and the indoor humidity can be automatically adjusted.

On the right side of the above table, 62 parts by weight of a synthetic resin emulsion (solid content: 45%) (27.9 parts by weight in terms of solid content), 2.6 parts by weight of carbon fiber, 10.4 parts by weight of organic microballoon, 1 part of water
Properties of thermal insulation made by mixing and kneading 100 parts by weight of early strength Portland cement with 100 parts by weight of a semi-liquid mixture composed of 25 parts by weight, a small amount of a thickener, a defoamer, and a fungicide Was described as a comparative example.

The properties of this heat insulating material is that the thermal conductivity is 0.05 (kcal / mhr
℃), raw specific gravity 0.52, air dry specific gravity 0.30, bending strength 14.1 (kg
f / cm ² ), compressive strength 16.5 (kgf / cm ² ), adhesive strength 6,8 (kgf / cm ² )
/ cm ² ), moisture permeability coefficient is 0.127 (g / m ² hmmHg), water absorption is 20.5
(%)Met.

When the comparative example is compared with the present example, the comparative example does not contain inorganic microballoons, so that the thermal conductivity is smaller than that of the present example, and the content of the synthetic resin emulsion is increased. It can be seen that the strength is improved and the adhesion strength is improved.

In addition, conventional insulation using cement as a matrix,
For example, as an example of using foamed mortar, perlite mortar, or the like as a heat insulating material, if the performance of a commercially available foamed heat insulating mortar is shown, the thermal conductivity is 0.09 to 0.12 (kc
al / mhr ° C), compressive strength 3-5 (kgf / cm ² ), and adhesion strength to mortar board 1.1 (kgf / cm ² ). It turns out that it is excellent.

In the above embodiment, the example in which the heat insulating material of the present invention is wet-laid on the structure body 33 as shown in FIG. 1 has been described. However, the present invention is not limited to the above embodiment.
A heat insulating layer 45 may be formed on the inner surface of the beam 41 and the lower surface of the floor slab 43 as shown in FIG. 2, and a heat insulating layer 51 is formed on both the inner surface of the outer wall 47 and both surfaces of the partition wall 49 as shown in FIG. May be the fourth
As shown in the figure, a heat insulating layer 57 may be formed on the inner surface of the outer wall 53 and both surfaces of the column 55, and furthermore, a heat insulating layer 63 may be formed on the inner surface of the outer wall 59 and the column 61 as shown in FIG. The good thing is, of course.

Further, based on 100 parts by weight of cement, 3 to 50 parts by weight of solid content of synthetic resin emulsion, 1 to 20 parts by weight of organic micro balloon, 0.3 to 5 parts by weight of carbon fiber, and 10 to 200 parts by weight of inorganic micro balloon. Even if the amount of each material used is changed, substantially the same effects as in the above embodiment can be obtained. In this case, by changing the ratio of various materials, strength, specific gravity, heat insulation performance, fire resistance, etc. can be changed, and a heat insulating material having heat insulation performance, fire resistance, strength, etc. corresponding to the purpose can be obtained. be able to.

Further, in the above embodiment, the example in which the heat insulating layer 37 is formed on the inner surface of the structure body 33 is described. However, the present invention is not limited to the above embodiment, and the heat insulating layer is formed on the outer surface of the structure body. Even in this case, substantially the same effects as in the above embodiment can be obtained.

Further, in the above-described embodiment, an example in which a small amount of a thickener, an antifoaming agent, and a fungicide are mixed with the heat insulating material has been described, but the present invention is not limited to the above-described embodiment, and a thickener, Even if an antifoaming agent, an antifungal agent, and the like are not mixed, and if necessary, other materials are mixed, the same effect as in the above embodiment can be obtained.

〔The invention's effect〕

The heat insulating material according to claim 1, wherein the solid content of the synthetic resin emulsion is 3 to 50 parts by weight, the organic microballoons are 1 to 20 parts by weight, and the carbon fiber is 0.
It consists of a mixture of 3-5 parts by weight and inorganic microballoons 10-200 parts by weight, has a thermal conductivity of 0.06 kacal / mhr ° C, an air-dry specific gravity of 0.31, a moisture permeability of 0.315 g / m ² hmmHg, and a water absorption rate. Is 31.4
It is a volume% and absorbs moisture when the humidity is high in the room, and releases the moisture when the humidity is low in the room. Therefore, it is possible to perform wet construction and greatly improve the flame retardancy and heat insulation performance. .

That is, since the mortar contains the synthetic resin emulsion and carbon fiber, the internal bond becomes strong, and in addition to the effect of preventing cracking, strength such as compressive strength and bending strength can be improved.

In addition, since it contains a synthetic resin emulsion, the adhesive strength of the heat insulating material to the concrete surface can be improved, and wet construction can be performed.

Furthermore, since it contains an organic microballoon or an inorganic microballoon, an air pocket is formed in the mortar, so that the thermal conductivity can be reduced and the heat insulation performance can be improved.

Further, since such a heat insulating material is an inorganic heat insulating material containing a large amount of an inorganic material, flame retardancy can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a structure using the heat insulating material of the present invention. FIG. 2 is a longitudinal sectional view showing another structure using the heat insulating material of the present invention. 3 to 5 are cross sectional views showing still another structure using the heat insulating material of the present invention. [Explanation of Signs of Main Parts] 33: Structure body 37, 45, 51, 57, 63 ... Heat insulation layer.

Claims (1)

(57) [Claims] 1. 100 parts by weight of cement, 3 to 50 parts by weight of solid content of synthetic resin emulsion, 1 to 20 parts by weight of organic microballoon, 0.3 to 5 parts by weight of carbon fiber, 10 to 10 parts by weight of inorganic microballoon. It has a thermal conductivity of 0.06 kacal / mhr ° C, an air-dry specific gravity of 0.31, a moisture permeability of 0.315 g / m ² hmmHg, a water absorption of 31.4% by volume, and humidity indoors. A heat insulating material that absorbs moisture when the temperature rises and releases moisture when the humidity falls indoors.