JPH054899B2 - - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a heat insulating material that is particularly preferably used for providing heat insulating areas in houses etc. where it is difficult to provide heat insulating materials by normal methods, such as around windows and doors. .

Technical Background of the Invention and Problems Therein In order to provide comfort to the living space and save on heating costs, especially in the winter, insulation methods are widely used in which a heat insulating material is installed on the outer wall surface that separates the indoor and outdoor areas of a residence. There is.

Conventionally known methods for insulating homes like this include installing a plate-shaped insulation material made of foamed plastic such as urethane foam, polyethylene foam, or phenol foam on the indoor side of the wall that separates the indoors and outdoors. .

However, with this construction method, it is difficult to provide heat insulating material around window frames or door frames, for example, due to the construction process and other reasons. This is because window frames generally require a space between the frame and the frame in order to be installed after the concrete frame work, and the area around the window frame or door is not suitable for the structure. This is because the structure is complicated and it was difficult to fill this part with plate-shaped heat insulating material. Therefore, this part was often not filled with heat insulating material.

A large amount of heat escapes from areas where no insulation is provided, such as around window frames or door frames (hereinafter referred to as insulation missing areas), and the insulation performance of the house is significantly reduced. There was a problem with putting it away.

For this reason, attempts have been made to provide some kind of heat insulating material to the above-mentioned heat insulating defective portion. For example, one such attempt is to fill the insulation defect with mortar, but since mortar itself has a high thermal conductivity, it is difficult to provide good insulation performance. In addition, a method of filling insulation defects with an insulation material made by mixing bead-shaped foamed plastics such as expanded polystyrene with mortar is also being considered, but this method still has the problem of poor insulation performance due to the large amount of mortar used. It was hot.

For this reason, a method has been proposed in which unfoamed urethane is poured into the insulation defect and the unfoamed urethane is foamed in the defect. However, with this method,
Urethane foaming is not easy to control;
Foamed urethane flows out from the insulation defect and adheres to the surrounding area, and foaming may occur with the urethane protruding from the insulation defect. In such cases,
There were major problems in that it took time and effort to remove the foamed urethane adhering to the surrounding area, and it also took time and effort to scrape off the foamed portion protruding from the insulation defect. Another problem was that foamable urethane was expensive.

Purpose of the Invention The present invention aims to solve the above-mentioned problems.The present invention is intended to solve the above-mentioned problems. The aim is to provide insulation materials that can improve the insulation performance of houses, etc.

Summary of the Invention The heat insulating material according to the present invention is a heat insulating material in which second foamed plastic particles are dispersed in a matrix made of a first foamed plastic, wherein the first foamed plastic has a density of 15 to 30 kg/m ³ . The first foamed plastic is made of at least one foamed plastic selected from the group consisting of phenol foam, urea foam with a density of 5 to 15 kg/m ³ , and urethane foam with a density of 10 to 30 kg/m ³ , and the first foamed plastic
The second foamed plastic particles have a breakable closed cell structure that is easily broken and deformed when stress is applied, and the second foamed plastic particles have a breakable closed cell structure that is more difficult to break than the closed cell structure of the first foamed plastic. It is characterized by having a cell structure.

The insulating material according to the present invention has a matrix of a first foamed plastic having foamed cells that buckle easily (i.e., a frangible closed cell structure) that buckle more than the foamed cells in the first foamed plastic. This is a heat insulating material in which second foamed plastic particles having resistant foam cells (ie, a resistant closed cell structure) are dispersed.

Here, "buckling" refers to the fact that when stress is applied from the outside to the heat insulating material of the present invention, the closed cell structure in the foam is deformed and destroyed and becomes interconnected.

The heat insulating material of the present invention, in which the second foamed plastic particles are dispersed in the first foamed plastic, is a foam and therefore exhibits excellent heat insulating properties. In addition, since the first foamed plastic has a breakable closed-cell structure (breakable foam cells) that easily buckles, it can be used efficiently to fill insulation-defective areas, such as between the concrete frame of a house and a window frame. It can be filled easily and without any gaps. Moreover, even if the easily broken foamed cells of the first foamed plastic are buckled and destroyed by filling these gaps, the hard-to-break closed cell structure (hardly broken foamed cells) in the second foamed plastic particles will not break. Therefore, the insulation performance of the insulation material as a whole will not be reduced when it is filled between spaces, and the insulation performance of houses etc. can be significantly improved.

Detailed Description of the Invention The heat insulating material according to the present invention will be described in detail below.

The heat insulating material according to the present invention is preferably provided in a heat insulation defect part in a building such as a house,
As shown in FIG. 1, the heat insulation defect portion 1 broadly refers to a space where no heat insulating material is provided, although it is originally preferable to provide a heat insulating material therein. Specifically, as shown in Figure 1, the area between the concrete frame 2 and the window frame 3 of the building, or around the door, or the area where the plate-shaped insulation material is originally installed, may be damaged for some reason. The figure shows the areas where this insulation material has been damaged due to damage.

The heat insulating material according to the present invention, which is preferably provided in such a heat insulation defect portion, is composed of first foamed plastic particles having easily broken foam cells and second foamed plastic particles having hard to break foam cells. The second expanded plastic particles are dispersed within a matrix of the first expanded plastic.

FIG. 2 schematically shows the state of the first plastic and second plastic particles in the heat insulating material according to the present invention. As shown in FIG. 2, in the heat insulating material of the present invention, the first foamed plastic 4 having a breakable closed-cell structure that is easily buckled by applying stress is bonded to the second foamed plastic particles 5. The particles are filling the space between them. More specifically, the foamed first foamed plastic particles 4 fill the spaces between the second foamed plastic particles 5, and the second foamed plastic particles 5 adhere to the first foamed plastic particles 4 at the interface between the two. A second foamed plastic particle 5 is bonded together by one foamed plastic 4 to form a heat insulating material.

Specifically, the first foamed plastic is selected from phenol foam with a density of 15 to 30 Kg/m ³ , urea foam with a density of 5 to 15 Kg/m ³ , and urethane foam with a density of 10 to 30 Kg/m ³ It is a foam that is made of foam.

The above density means that each resin was foamed at a high expansion ratio. By foaming at such a high expansion ratio, the cell partition walls forming the closed cells become thinner, and foamed cells that are easily buckled and destroyed by external stress are formed.

On the other hand, the second foamed plastic particles have foamed cells having such strength that their shape does not change (that is, they do not buckle) under the stress that causes the foamed cells in the first foamed plastic to buckle.

The second expanded plastic particles are dispersed within a matrix of the first expanded plastic.

As such second foamed plastic particles, foamed plastic that has been widely used as a heat insulating material can be used.

The foamed cells in the second foamed plastic particles do not buckle under conditions that would cause the foamed cells of the first foamed plastic to buckle, and their closed cell structure is maintained. That is, the foamed cells in the first foamed plastic are easily destructible foamed cells whose closed cell shape is deformed and broken by buckling when stress is applied, but the foamed cells in the second foamed plastic particles are easily destructible. The cells are non-destructive foam cells that do not degenerate or break under conditions that cause the foam cells of the first foam plastic to buckle.

Since the second foamed plastic particles have non-destructible foamed cells, stress applied during filling causes the easily destructible foamed cells in the first foamed plastic to buckle, causing the insulation material itself to buckle. Even if the morphology changes, the non-destructive foam cells in the second foamed plastic particles maintain their closed cell structure. Therefore, good heat insulation performance is ensured for the heat insulating material as a whole. Furthermore, even when the easily breakable foam cells in the first foam plastic buckle, the insulation material as a whole has the function of preventing an extreme decrease in volume, that is, the role of volume retention as a filler. is doing.

The second expanded plastic particles are granular;
May be foamed foamed plastic granules;
Alternatively, it may be made into granules by crushing a plate-shaped foamed plastic. The second foamed plastic particles preferably have a large number of closed cells with excellent heat insulation properties, but specifically, foamed polystyrene, foamed polyethylene, foamed polypropylene, foamed polyvinyl chloride, etc. are used as the foamed plastic particles. It will be done.

Further, as the foamed plastic that is crushed into granules, granular crushed urethane foam, crushed phenol foam, or crushed granular expanded polystyrene having a density higher than that of the first foamed plastic is used. . That is, the expansion ratio of the second foamed plastic particles is lower than the expansion ratio of the first foamed plastic if they are made of the same resin. The particle size of the granular second expanded plastic particles is preferably 0.5 to 5 mm.

In such a heat insulating material made of the first foamed plastic and the second foamed plastic particles, the area ratio of the first foamed plastic to the second foamed plastic particles is usually 5: 5-1:9, preferably 4:6-2:
It will be about 8.

In order to improve the adhesion between the first foamed plastic particles and the second foamed plastic particles of the heat insulating material according to the present invention, the first foamed plastic particles are coated on the surface of the second foamed plastic particles.
It is also possible to perform a primer treatment in advance before mixing with the foamed plastic, and when performing the primer treatment, an adhesive such as polyvinyl acetate or epoxy resin is used.

The heat insulating material according to the present invention is at least one selected from the group consisting of phenol foam with a density of 15 to 30 Kg/m ³ , urea foam with a density of 5 to 15 Kg/m ³ , and urethane foam with a density of 10 to 30 Kg/m ³ the first of
It can be manufactured by dispersing second plastic particles in a foamed plastic. Various methods can be used to disperse the second foamed plastic particles into the first foamed plastic, but usually the raw materials for forming the first foamed plastic and the second foamed plastic particles are mixed and then the second foamed plastic particles are dispersed. By foaming the first foamed plastic forming raw material, the second foamed plastic particles are dispersed into the first foamed plastic. It goes without saying that during this foaming, the density of the first foamed plastic is within the range of the present invention.

Furthermore, if necessary, inorganic foam particles such as perlite or shirasu balloons can be added to the above-mentioned heat insulating material as an extender. It is also possible to add inorganic fibers or organic fibers such as asbestos glass fibers to the heat insulating material to improve the cohesiveness of the foamed plastic as a mass, and to improve the mechanical strength of the heat insulating material.

In addition, in order to improve the adhesion between the heat insulating material and the surrounding wall of the heat insulation defect after filling the heat insulating material of the present invention into the heat insulation defect, and to improve the workability during filling, polyvinyl acetate was added during the heat insulation. Polyacrylic ester, polyvinyl alcohol, synthetic rubber (CR,
Additives such as SBR, NBR) can also be added.

For example, the heat insulating material of the present invention obtained as described above is used in the following manner.

The heat insulating material of the present invention may be obtained by buckling at least a portion of the breakable foam cells in the first foamed plastic and filling the heat insulating material into the shape of the heat insulation defect. Specifically, such a heat insulating material composition is filled into a heat insulation defect in a building such as a house using a trowel or the like. At this time, at least a portion of the breakable foam cells in the first foamed plastic are easily buckled, and the heat insulating material itself is deformed into a desired shape and penetrates into the details of the heat insulation defect. On the other hand, the non-destructive foam cells in the second foamed plastic particles are not buckled when the heat insulating agent of the present invention is filled with a trowel or the like, and the non-destructive foam cells maintain their shape.

As described above, when the heat insulating material of the present invention is filled into a heat insulation defect, at least a portion of the easily destructible foam cells in the first foam plastic is buckled, and the heat insulating material itself is deformed, and the second foam plastic is deformed. As long as the non-destructive foam cells in the plastic particles do not buckle, the insulation material can be filled into the missing insulation material by any method, but it is not necessary to use a trowel or the like to fill the insulation material. There isn't. For example, a rod-shaped heat insulating material according to the present invention is prepared, and the rod-shaped heat insulating material is applied to a defective portion of the heat insulating material by buckling at least a portion of the breakable foam cells in the first foamed plastic. The heat insulating material may be filled into the heat insulating defect portion by pushing the material while changing its shape so as to correspond to the shape of the heat insulating material defect portion.

As described above, in the heat insulating material of the present invention, the second foamed plastic particles having hard-to-break foam cells are dispersed in the matrix made of the first foam plastic having easy-to-break foam cells. When filling the area with this insulation material, at least a portion of the easily destructible foam cells in the first foamed plastic buckle and deform to correspond to the intricate structure of the insulation missing area. The insulation material can be filled into even the smallest details of the defect. Furthermore, even if the second foamed plastic particles are filled in a similar manner, the non-destructible foamed cells in the second foamed plastic particles do not buckle, so that the foamed plastic provides good heat insulation performance.

Effects of the Invention The heat insulating material according to the present invention has second foamed plastic particles having non-destructible foamed cells dispersed in a matrix made of a first foamed plastic having easily destructible foamed cells. When this insulation material is filled into a defective area such as between a building frame and a window frame, the breakable foam cells in the first foamed plastic are buckled, and the shape of the insulation material itself corresponds to the shape of the defective area. The foamed plastic heat insulating material, which has excellent heat insulating performance, can be easily filled into the missing part of the heat insulating material without forming a gap, and the heat insulating performance of houses, etc. can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a heat-insulating defect portion to which a heat-insulating material is provided according to the present invention, and FIG. 2 is a schematic diagram illustrating a heat-insulating material filled into the heat-insulating defect portion. 1...Insulation defective part, 2...Concrete frame,
3...Window frame, 4...First foam plastic, 5...
...Second expanded plastic particles.

Claims (1)

[Scope of Claims] 1. A heat insulating material in which second foamed plastic particles are dispersed in a matrix made of a first foamed plastic, wherein the first foamed plastic is a phenolic foam having a density of 15 to 30 kg/m ³ . The first foamed plastic is made of at least one foamed plastic selected from the group consisting of urea foam with a density of 5 to 15 kg/m ³ and urethane foam with a density of 10 to 30 kg/m ³ , and the first foamed plastic is
The second foamed plastic particles have a breakable closed cell structure that is easily broken and deformed when stress is applied, and the second foamed plastic particles have a breakable closed cell structure that is more difficult to break than the closed cell structure of the first foamed plastic. A heat insulating material characterized by having a cell structure.