JPH1122046A - Joint tape of heat insulating plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve watertightness, airtightness, waterproof performance and heat insulating performance by arranging a waterproof film layer on a surface of a base material layer composed of a soft foaming body having independent foam, and arranging a pressure sensitive adhesive layer on its surface. SOLUTION: A waterproof film layer 50 made of polyethylene terephthalate or the like is arranged on one surface of a base material layer 40 composed of a soft foaming body having independent foam which is made of a vinyl chloride resin or the like. Next, a pressure sensitive adhesive layer 60 such as butyl rubber is arranged on a surface of the waterproof film layer 50, and mold separable paper 70 is also stuck to its surface, and a joint tape 30 of a heat insulating plate is constituted. The joint tape 30 is stuck to the butting part outdoor side so as to block up a clearance generated in a butting part of the heat insulating plate by stretching a heat insulating plate all over in the surface direction to the outdoor side of a columnar body to constitute a wooden building. This joint tape 30 is excellent in waterproof performance, airtightness, heat insulating performance and watertightness, and is also excellent in extension-contraction follow-up performance to a mating member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to floors, walls, and the like of buildings.
The present invention relates to a joint tape for an insulating plate which is adhered to the outside of a butt portion of an insulating plate stretched for heat insulation of a roof or the like and has excellent watertightness, airtightness, waterproofness, and heat insulating properties.

[0002]

BACKGROUND OF THE INVENTION In order to enhance the heat insulating performance of buildings such as houses, heat insulating materials are installed on walls and roofs. As a heat insulating material, glass wool and the like are known, but glass wool has a problem in terms of water absorption and durability and is not easy to construct.In recent years, an insulating plate made of expanded polystyrene or the like has been used. It has become FIG. 9 shows an example in which a heat insulating structure for a wall is constructed using such a heat insulating plate.

[0003] As shown in FIG. 9, a heat insulating plate 3 is stretched in the surface direction on the outside of the pillar 1 and the stud 2, and a body edge 4 is provided on the outside thereof.
Is abutted and nailed in the direction of the pillars 1 and the studs 2 from the rim 4 to fix, for example, a heat insulating plate 3 made of high-expanded polystyrene, and to obtain a desired heat insulating performance by the heat insulating plate 3. ing.

In FIG. 9, reference numeral "6" denotes an interior material,
“7” indicates an exterior material. In such a conventional heat insulating structure, a gap is apt to be formed in the abutting portion 12 between the heat insulating plates 3, and there is a possibility that the airtightness, heat insulating property, waterproof property and the like are reduced in this portion. In order to improve airtightness, heat insulation, etc., a sealing material is filled so as to close the gap m between the butted portions 12 between the heat insulating plates 3 or the butted portions 12 of the heat insulating material are filled.
Or put an airtight tape on it. Since the work of filling the sealing material is complicated, a construction method in which an airtight tape (waterproof / airtight tape) is applied is recommended.

As such an airtight tape, for example,
Examples having a layer configuration as shown in the following to (13) are given. Polyvinyl chloride (PVC) foam layer + acrylic adhesive layer + release paper [including double-sided adhesive application type. See Japanese Utility Model Application No. Hei 2-26459 (Japanese Utility Model Application Laid-Open No. 3-117006)], a polyvinyl chloride (PVC) foam layer + butyl rubber-based adhesive layer + release paper (including a double-sided adhesive coated type), EPDM ( Ethylene / propylene rubber) foam layer +
Butyl rubber-based pressure-sensitive adhesive layer + release paper [However, the foam layer is a semi-open / semi-closed cell (also referred to as “half-open / semi-German”) EP.
It is formed of DM foam. ], Polyethylene terephthalate (PET) film +
EPDM (ethylene / propylene rubber) foam layer + butyl rubber-based adhesive layer + release paper [however, the foam layer is formed of a semi-open, semi-closed cell EPDM foam. ], Aluminum foil + rubber asphalt adhesive layer, aluminum foil + polyethylene sack + rubber asphalt adhesive layer, polyethylene base fabric + acrylic adhesive layer, polyurethane foam layer + acrylic adhesive layer + release paper (double-sided adhesive coating Type), polyurethane foam layer + butyl rubber adhesive layer + release paper (including double-sided adhesive coating type), (10) polyester nonwoven fabric + butyl rubber adhesive layer + release paper, (11) butyl rubber adhesive Material layer + polyester net + butyl rubber-based adhesive layer + release paper, (12) weatherproof film aluminum foil + butyl rubber-based adhesive layer + release paper, (13) asphalt-impregnated synthetic fiber nonwoven fabric + rubber asphalt-based adhesive layer + release paper Such.

[0006] In the case of a construction method in which such various airtight tapes are stretched on joints (butting portions) of the heat insulating plate, the airtight tapes include:
Some heat insulation performance is required in addition to waterproof and airtight performance. The reason is that in FIG.
The gap m of No. 2 is a heat insulation defect, and becomes a cold bridge (cold bridge) during indoor cooling in summer, indoor heating in winter, and the like, for example, which is highly likely to cause dew condensation. Further, in the case where a plurality of heat insulating material layers (for example, two layers) are provided as in the “double-layer heat insulating material construction method”, the airtight tape or the base material for the tape is easily applied with a slight force. Although it can be compressed and expands and restores to almost the original state when the compressive force is removed, "low compressibility", which is a property that the restoring / repulsive force at the time of compression is small, is also required from the viewpoint of workability.

[0007] Of the above airtight tapes,
The airtight tape shown in (1) has a certain degree of waterproof / airtightness and heat insulation, but the airtight tape shown in (2) above has a foam layer of semi-continuous and semi-closed cells, and is water-tight. It is not sufficient, and there is a possibility that dew condensation, mold, etc. may occur on the joint portion of the joint tape. The airtight tape shown in
When using the airtight tape by compressing, such as airtightness, waterproofness and heat insulating properties, such as the "insulation material double-layer construction method",
There is not much problem in terms of water tightness, but the "insulating material single-layer construction method", which is not usually used by compression, is not sufficient in terms of water tightness.

The airtight tapes shown in the above (1) and (10) to (13) all have remarkably poor heat insulating properties.
The airtight tapes shown in (12) and (12) are more likely to crack or break aluminum foil with poor elasticity when joints are expanded due to expansion and contraction of the heat insulating plate, and (10) to (11), (13). The airtight tape shown in ()) has poor airtightness, watertightness, and waterproofness.

[0009] The airtight tape shown in (1) and (2) has relatively good heat insulation, waterproofness and airtightness among the above-mentioned airtight tapes, but is watertight (water vapor impervious).
There is room for further improvement in terms of

[0010]

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems associated with the prior art described above, and is a joint which is excellent in waterproofness, heat insulation, airtightness, followability of expansion and contraction, and excellent in watertightness. It is intended to provide a tape (sealing tape).

[0011] More specifically, the present invention particularly relates to external heat insulation
It can be applied to high heat insulation and high airtight construction methods, and has excellent sealing properties at the joints of heat insulating plates made of foamed resin such as expanded polystyrene, especially waterproofness, airtightness, heat insulation, and watertightness. It is an object of the present invention to provide a joint tape of a heat insulating plate which is excellent in extensibility and also excellent in following the expansion and contraction of the heat insulating plate as a mating member.

[0012]

SUMMARY OF THE INVENTION A first joint tape of a heat insulating plate according to the present invention is provided with a gap formed at a butt portion of a heat insulating plate formed by extending a heat insulating plate in a plane direction on the outdoor side of a columnar body constituting a wooden building. It is a joint tape of the heat insulating plate which is stuck to the outside of the butted portion of the heat insulating plate so as to be closed, and the joint tape is a soft foam having closed cells (preferably PVC).
Base material layer), a waterproof film layer (preferably PET) provided on one surface of the base material layer, and an adhesive layer (preferably provided on the surface of the waterproof film layer). Butyl rubber) and release paper adhered to the surface of the pressure-sensitive adhesive layer.

[0013] The second joint tape of the heat insulating plate according to the present invention closes a gap generated at a butt portion of the heat insulating plate formed by extending the heat insulating plate around the outside of the columnar body constituting the wooden building in the plane direction. Thus, the joint tape of the heat insulating plate to be stuck to the outside of the butted portion of the heat insulating plate, the joint tape is a base layer of a soft foam having closed cells, one of the base layer And a waterproof film layer provided on the other surface of the base material layer.

In a preferred embodiment of the present invention, in any of the above inventions, the flexible foam is a vinyl chloride resin (PVC) type, and the pressure-sensitive adhesive layer is a butyl rubber type. It is preferable that the waterproof film layer is made of PET.

[0015] In the second joint tape, a release agent may be further applied to the surface of the waterproof film layer. According to the first and second aspects of the present invention, in particular, the sealing properties of the joints of the heat insulating plates made of a foamed resin such as expanded polystyrene in the external heat insulation / high heat insulation / high airtightness method are excellent. A joint tape of a heat insulating plate is provided which has excellent heat insulating properties and also has excellent stretchability following expansion and contraction of a heat insulating plate as a mating member.

[0016]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, a joint tape for a heat insulating plate according to the present invention will be specifically described with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention.
2 is a partially enlarged sectional view of a second joint tape according to a preferred embodiment of the present invention. FIG. In the drawings, the same reference numerals indicate the same members.

[Joint Tape] First, the first joint tape will be described. <First joint tape> The first joint tape 30 of the heat insulating plate according to the present invention shown in FIG. 1 is a heat insulating plate in which a heat insulating plate is stretched in the surface direction on the outdoor side of a columnar body constituting a wooden building. The heat insulating plate is attached to the outside of the butted portion of the heat insulating plate so as to close a gap generated at the butted portion of the plate.

The first joint tape 30 of the heat insulating plate shown in FIG. 1 is a soft foam having closed cells (eg, PVC).
A base layer 40 composed of: a waterproof film layer (eg, PET-based) 50 provided on one surface of the base layer; and an adhesive layer 60 provided on the surface of the waterproof film layer; A release paper 70 is attached to the surface of the pressure-sensitive adhesive layer.

In such a joint tape 30, the thickness of each layer constituting the tape is not particularly limited, but under non-pressure, the thickness of the base material layer 40 differs depending on the purpose of use, site, and the like. Is not determined, for example, 0.3
10 to 10 mm, the thickness of the waterproof film layer 50 is, for example, 10 to 100 μm, preferably 20 to 80 μm, and the thickness of the pressure-sensitive adhesive layer 60 is 10 to 500 μm, preferably about 20 to 80 μm. The thickness of the pattern 70 is 30
２００200 μm, preferably 80-150 μm.

The total thickness of the joint tape 30 composed of these layers varies depending on the use site and the like and is not determined unconditionally.
The thickness is preferably about 0.8 to 5 mm. <Base Layer> As the flexible foam constituting the base layer 40 of the joint tape 30, various types of conventionally known flexible foams can be used, and specifically, for example, vinyl chloride resin (PVC) foam , Polyurethane foam, silicon resin foam, polyethylene foam, polystyrene foam, EPDM (ethylene-propylene copolymer rubber)
Foam, rubber latex foam and the like. Among these, a vinyl chloride resin (PVC) foam is preferable because it is excellent in weather resistance, chemical resistance, and heat insulating performance, has a low water absorption rate, and can provide a joint tape excellent in airtightness, compressibility, and the like. . The expansion ratio of such a soft foam is represented by the reciprocal of the density (g / cm ³ ) and depends on the material and the like, but is usually 4 to 50 times, preferably 5 to 20 times.
And more preferably about 7 to 15 times. When a soft foam having such an expansion ratio is used, a joint tape that is lightweight, has a small compressive stress, has excellent compressibility, and has excellent flexibility can be obtained.

Among the above resins or rubbers having such an expansion ratio, especially, a joint tape using a PVC soft foam becomes softer, and a double-layer construction method of a heat insulating plate (see FIGS. 6 and 7). When used in, the first inner insulation plate 3
The joint tape 11 has been affixed to the joints m ₁ briefly pressed by abutting the outer heat insulating plate 5 of the second layer (compression) of
The inner and outer heat insulating layers can be disposed so as to be in close contact with or close to each other, and the heat insulating property and the like are further improved, which is preferable.

The above-mentioned flexible foam having the expansion ratio usually has a closed cell type cell structure. It is preferable to use such a closed-cell-type soft foam because a joint tape having particularly excellent watertightness (non-water vapor permeability), low water absorption, and excellent workability can be obtained.

The compressive stress of such a soft foam is usually 0.9 kgf / cm ² or less, preferably 0.8 to 0.1 kgf / cm ² , more preferably 0.7 kg / cm ^{2 at} a compressibility of 50%. it is desirable ~0.2kg a heavy / cm ^2. The compression ratio (%) = {(sample thickness before compression−sample thickness after compression) / sample thickness before compression} × 100 (%).

When the soft foam (preferably PVC) has such a low compressive stress, the resilience of the joint tape stretched over the butted portion of the heat insulating plate is small, and the mating member (adherend: heat insulating plate) Good a hermeticity can be ensured by following the uneven surface of the abutting part).
In the case where the heat insulating plate is stretched more than one layer (a method of stretching the heat insulating plate in two layers), the heat insulating plate is preferably stretched in workability. <Waterproof film layer> The waterproof film layer 50 contributes to the improvement of the waterproof property of the joint tape 30 to be obtained and may be any of resin-based and rubber-based. Or thermosetting.

As such a waterproof film material, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethylene (P)
E), polypropylene (PP), polyamide (PA),
Examples include polyimide, polyvinylidene chloride, polyvinyl alcohol, rubber hydrochloride, polycarbonate (PC), polystyrene (PS), polyvinyl chloride (PVC), and ionomer. These waterproof film materials may be used alone or in combination of two or more (mixed),
For example, it may be used as a composite film such as laminating an ionomer film and a nylon film. Of these waterproof film materials, if a soft and excellent workability, a large elongation (elongation), and a low water absorption are used, the resulting joint tape 30 is hardly delaminated, and the mating member (coated material) is used. Good watertightness (water vapor impermeability) following the uneven surface of the body
Is preferable because it is possible to secure the same.

As such a waterproof film material, P
ET is preferably used. The waterproof film may be stretched by a method such as uniaxial or biaxial stretching, or may not be stretched, depending on the type of the film material and the like. <Adhesive for Adhesive Layer> Examples of the adhesive for the adhesive layer 60 include natural rubber (eg, polyisoprene), styrene-butadiene rubber, butyl rubber, polyisobutylene, and the like.
Acrylic (eg, polybutyl acrylate, 2-ethylhexyl polyacrylate, polyacrylic acid), silicone rubber, polyvinyl ether (eg, polyvinyl butyl ether), recycled rubber, modified urethane rubber (eg, acrylic modified urethane) Rubber-based). Of these, when using a butyl rubber-based material, a desired adhesive property can be obtained only by using a small amount, so that the joint tape can be thinned, excellent in initial and long-term adhesive strength, excellent in low-temperature adhesiveness, and even under high temperature. This is preferable because it does not easily sag.

In the case of such a pressure-sensitive adhesive layer 60, particularly, a butyl rubber-based pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer 60 is suitable for expanding and narrowing joints of the heat insulating plate due to expansion and contraction of the heat insulating plate. The joint tape 30 does not transmit a tensile force to the base layer 40 made of a PVC flexible foam or the like, so that there is no fear of the joint tape 30 being cut or cracked, and various excellent properties of the joint tape 30 ( Watertightness, airtightness, waterproofness, heat insulation, etc.). <Release Paper> As the release paper 70, a conventionally known release paper can be widely used. For example, a paraffin used also as a release agent described below is impregnated into the base sheet, or is melted on the base sheet surface. Those obtained by impregnating the base sheet with various surfactants, such as fluororesin, silicone resin, and acrylic resin, or coating the base sheet surface; and the like. Can be Examples of the base sheet include paper, metal foil, and resin film.

<Manufacture of First Joint Tape> In order to manufacture the first joint tape according to the present invention, for example, in FIG. 1, a surface (such as a PET (polyethylene terephthalate) film for the waterproof film layer 50) is used. Top) 50A,
The foamable polyvinyl chloride (PVC) -based beads for forming the base layer 40 are placed, and the beads are heated and expanded to form the PVC foam layer (base layer) 40. In addition, foamable PVC
Beads include, for example, PVC and a blowing agent (eg, propane,
Hydrocarbon-based blowing agent such as butane and pentane), and when the beads are heated, the blowing agent vaporizes and expands,
Examples include those in which PVC foaming is caused. Further, when the foam layer (base layer) 40 is formed on one surface of the waterproof film layer 50 by such a method, the waterproof film and the foam beads are waterproof when heated during foaming. Even if the film layer 50 is somewhat softened, a material which does not melt or flow is used in combination.

If necessary, the surface 50A of the waterproof film layer 50 on which the base layer 40 is formed may be bonded to the base layer 40 and the waterproof film layer 50 by a method such as surface roughening.
May be enhanced.

Next, an adhesive is applied to the back (lower surface) 50B of the PET waterproof film layer 50 on which the PVC foam base material layer 40 is formed as described above, for example, by applying a butyl rubber-based adhesive. The layer 60 is formed. Next, when the release paper 70 is adhered to the lower surface (back surface) 60B of the adhesive layer 60, the joint tape 30 of the present invention as shown in FIG. 1 is obtained.

Such a first joint tape has a well-balanced and excellent airtightness, easy compressibility (compressive stress), water resistance (watertightness), heat insulation, tensile strength, tear strength, flexibility, elongation, and the like. ing.

Such a joint tape has excellent resistance to acids, alkalis, oils, and the like, in addition to the above-mentioned excellent properties. <Second joint tape> Next, a second joint tape according to the present invention will be specifically described with reference to FIGS.

The second joint tape 3 of the heat insulating plate according to the present invention
Reference numeral 0 denotes a base layer 40 made of a flexible foam (eg, PVC) having closed cells, as shown in FIG.
The pressure-sensitive adhesive layer (eg, butyl rubber) 60 provided on one surface (the lower surface in FIG. 2) of the base material layer 40 and the waterproof film layer (the upper surface in FIG. 2) Example: PET-based) 50.

In such a second joint tape 30, the thickness of the joint tape, the material, thickness, and various characteristics of the base layer 40, the adhesive layer 60, and the waterproof film layer 50 constituting the joint tape are described. Are the same as those of the first joint tape 30 described above. <Release Agent> In the second joint tape 30 according to the present invention, a release agent (anti-adhesive agent) 80 is further applied to the surface of the waterproof film layer 50 as shown in FIG. It is preferred that

When the release agent 80 is applied to the surface of the waterproof film layer 50, the adhesive layer 60 and the adhesive layer 60 are waterproof even when the joint tape 30 is wound and stored or transported. The joint tape 30 can be stretched easily at the joints of the heat insulating plate by unwinding at the time of use without sticking or adhering to the conductive film layer 50. Moreover, the joint tape wound like this is
The adhesive layer 60 does not adhere to the waterproof film layer 50 to the extent that it is difficult to easily unwind the joint tape 30, and even if the joint tape 30 is unwound at the time of use, etc. (40, 50, 60,
No break or crack occurs in 70), and no delamination occurs.

Examples of the release agent include silicone rubber or resin, stearyl acrylate-acrylonitrile copolymer, chromium complex, etc., higher olefins (for example, having 12 or more carbon atoms), paraffins (liquid paraffin, paraffin wax) and the like. Of these, silicone rubber or resin is preferred.

<Manufacture of Second Joint Tape> The second joint tape 30 according to the present invention as shown in FIG. 2 is, for example, one side of a waterproof film layer 50 made of PET or the like in FIG. (In FIG. 2, lower surface) A PVC foam layer (base layer) 40 is formed on 50B in the same manner as described above, and further on the lower surface 40B of this PVC foam layer (base layer) 40 in the same manner as described above, for example, If the adhesive layer 60 of butyl rubber or the like is formed, the joint tape 30 as shown in FIG. 2 is obtained.
In the joint tape 30 as shown in FIG. 2 in which each layer is composed of such a material, even when wound and stored / transported, the PET waterproof film layer 50 and the butyl rubber pressure-sensitive adhesive layer 60 have an adhesive property. -Poor adhesion, easy to unwind and use. For this reason, the release paper 70 does not have to be attached to the lower surface 60B of the adhesive layer 60 of the joint tape 30 thus obtained, but the material constituting the waterproof film layer 50 and the adhesive layer Depending on the type, combination, and the like of the materials constituting the 60, as shown in FIG. 3, a release paper 70 similar to the above may be further attached.

The first joint tape obtained as described above is, for example, “PVC foam layer / PET film /
Or a second joint tape composed of, for example, "PET film / PVC foam layer / butyl adhesive layer" (see FIG. 2). If necessary, the release paper is peeled off if necessary, and if the adhesive tape 30 is adhered along the joints of the heat insulating plate so that the adhesive layer side of the joint tape faces the heat insulating plate, leakage of indoor air, or Since the infiltration of the outside air is blocked by the joint tape, dew condensation does not occur at the joint tape, and the durability of the building is improved.

[ Application Example of Joint Tape] An example of application of such first and second joint tapes (also collectively referred to simply as “joint tape”) will be described below.

As shown in FIGS. 4 and 5, the pillar 1 and the stud 2
The interior material 6 is stretched on the indoor side of the building in which is vertically erected, and a single-layer heat insulating plate 3 is stretched on the outdoor side in this embodiment.

An inner ventilation layer 10 is formed between the heat insulating plate 3 and the interior material 6. This insulation plate 3
Since a sheet of a predetermined size is stretched in the plane direction, a gap (shown somewhat exaggerated and wide in the drawing) is formed in the abutting portion 12 of each heat insulating plate 3.

In this embodiment, the adhesive layer 60 of the joint tape 30 is provided on the outdoor side of the butted portion 12 of the heat insulating plate 3.
The joint tape 3 is disposed so that the side faces the heat insulating plate 3.
0 is stuck. In the case of the joint tape 30 with release paper 70 as shown in FIGS. 1 and 3, the release paper 70 is peeled off, and the adhesive tape 60 side of the joint tape is arranged so as to face the heat insulating plate 3. The joint tape 30 is stuck. Then, from the top of this joint tape, the torso 4
The studs 2 are nailed with nails or the like, and exterior members 7 are attached to the exterior sides of the rims 4 and 4. The joint tape 30
Although it is not always necessary to provide at the position corresponding to the waist edge 4,
It is preferable to stick to all butted portions 12 of the heat insulating plates.

The heat insulating plate 3 is preferably a synthetic resin foam heat insulating plate, and is a foamed plate having a closed cell structure made by foaming a synthetic resin such as polystyrene, polyethylene, polyvinyl chloride, or polyurethane by 5 to 50 times. Thickness 20 to 10
The one with 0 mm is preferable. Among them, it is effective to use an extruded polystyrene foam plate having high rigidity, high heat insulation and high moisture permeability. Next, a method of constructing a heat insulating wall using such a joint tape will be described.

First, the inner heat insulating plate 3 is stretched around the pillar 1 and the stud 2 in the plane direction. Thereby, an air space 10 is formed between the pillar 1 and the stud 2. Next, joint tape 30 is stuck to the outside of the heat insulating plate 3 so as to close the gap between the butted portions 12 of the inner heat insulating plate 3. In the case where the joint tape 30 used at this time has a release paper 70 as shown in FIGS. 1 and 3, the release paper 70 is peeled off and attached to the outdoor side of the heat insulating plate 3. To wear.

Then, the waist edges 4, 4 are attached from above,
The exterior material 7 may be attached to the outside of the body edges 4 and 4, and the interior material 6 may be attached to the interior of the pillars 1 and the studs 2. In the insulating wall formed in this way, since the joint tape 30 has excellent watertightness, airtightness, waterproofness, and heat insulation, the watertightness, airtightness, and waterproofness of the butted portions 12 between the heat insulating plates 3 are provided. In addition, the heat insulating property is improved, and particularly, the heat insulating property of the entire wall is also improved. Note that the present invention is not limited to the above-described embodiment, and can be variously modified. For example, as shown in FIG. 6 and FIG.
And a two-layered outer heat insulating plate 5. A joint tape 30 is attached to the outside of the inner heat insulating plate 3, and the outer heat insulating plate 5 is joined to the outer side of the inner heat insulating plate 3. It can also be stretched so that 12a does not overlap with that of the inner heat insulating plate 3.

In the stretched structure of the heat insulating plate thus formed, the joint tape 30 is adhered to the outside of the inner heat insulating plate 3, so that the gap m ₁ between the inner heat insulating plate 3 and the outer heat insulating plate 5. of it to block the communication gap m _2, effectively prevent leakage and external air infiltration of room air, thereby further increasing the interior of the heat insulating performance.

The bonding of the joint tape 30 causes the gap m
_{If 1} is closed, the tightness of the butted end portion 5a of the outer heat insulating plate 5 does not need to be strict, and the mounting operation of the outer heat insulating plate 5 can be performed easily and quickly. This is because the joint tape 30 blocks the air circulation path. When the joint tape 30 is attached to the outside of the inner heat insulating plate 3, the joint tape 30 is pressed by the outer heat insulating plate 5, so that there is no fear of peeling.

Further, according to the present invention, not only the wall structure but also the structure shown in FIG.
It is also possible to apply to a roof structure as shown in FIG. In the example shown in FIG. 8, a plate 21 and the like are provided on the outdoor side of the rafter 20, and two layers of heat insulating plates 3 and 5 are stretched on the outdoor side of the plate 21, and the butt portion 12 of the inner heat insulating plate 3 is formed. Outside the room,
The joint tape 30 is provided. Then, a roof material 22 such as a color iron plate is stretched on the outdoor side of the outer heat insulating plate 5 via a field board and waterproof paper.

Even in such an embodiment, the intended object of the present invention can be achieved. Further, the joint tape according to the present invention can be applied to a heat insulating structure of a floor.

[0051]

The joint tape of the heat insulating plate according to the present invention can be suitably applied particularly to external heat insulation, high heat insulation and high airtightness, and the sealing of the joint of the heat insulation plate made of a foamed resin such as expanded polystyrene in the method. Excellent sealing properties
In particular, it is excellent in waterproofness, airtightness, heat insulation, and water tightness, and also excellent in followability of expansion / contraction (expansion / reduction) of the gap between the heat insulating plate joints, which is the mating member.

The joint tape of the heat insulating plate according to the present invention is further improved in waterproofness and airtightness as compared with the conventional tape, and also has heat insulating properties and the like. When closed with such joint tape, the water-tightness, air-tightness, waterproofness, and heat insulation, particularly water-tightness and heat insulation, of the butt portion are improved. Therefore, leakage of indoor air is well blocked at this joint tape portion, and a cold bridge (cold bridge) or a thermal bridge hardly occurs in the gap between the heat insulating plates (butting portions of the heat insulating plates). No condensation occurs due to the cold bridge at the part, and the durability of buildings and the like is improved.

In the joint tape according to the present invention, when the pressure-sensitive adhesive layer is of a butyl rubber type in particular, the pressure-sensitive adhesive material can expand and contract satisfactorily following expansion and contraction of the bonding surface (joint of the heat insulating plate). Even if the adhesive surface expands and contracts, almost no tensile force is transmitted to the base material layer of the joint tape, so that the joint tape does not break and the above-mentioned performance of the excellent joint tape of the present invention can be maintained for a long time.

Further, in the joint tape according to the present invention,
When the waterproof film layer is made of PET film,
In particular, the joint tape is excellent in waterproofness, watertightness and the like. In particular, when a PET film is used as the film for the waterproof film layer in the second joint tape (see FIG. 2) according to the present invention, the resulting joint tape has an adhesive in addition to the waterproof property and the like. Since the role of the release paper for the layer can be given at the same time, when the joint tape is wound and stored or transported, the sticking of the release paper to the surface of the pressure-sensitive adhesive layer can be omitted. For this reason, in the second joint tape using a PET film as the film for the waterproof film layer, it is possible to improve the workability of the joint tape to the heat insulating plate.

[0055]

EXAMPLES 1-2, REFERENCE EXAMPLE 1, COMPARATIVE EXAMPLES 1-3 The joint tape of the heat insulating plate according to the present invention will be described in more detail with reference to the following examples. It is not limited.

The test method and results are shown below. In addition,
The room temperature at the time of measurement was set to 23 ° C. The test machine capacity was 10 kgf for load cell type, and the test piece shape was J
IS1 type. <Joint tape of heat insulating plate> [Reference example 1] An acrylic adhesive (about 50 μm thick) is applied to one surface of a polyvinyl chloride foam (expansion ratio: about 10 times) sheet, and is applied to the other surface of the foam sheet. Is release paper (about 100μm thick)
Was applied to form a joint tape for the heat insulating plate. The joint tape is usually wound into a coil for storage, transportation, handling, and the like, and the coil is unwound when used, and the release paper is peeled off. Change the thickness of the entire joint tape: 2mm thickness, 4mm thickness, 8m
m thickness). Example 1 As shown in FIG. 1, a polyethylene terephthalate (PET) film (approximately 35) was formed on one side of the same polyvinyl chloride foam sheet (expansion ratio of about 10) as used in Reference Example 1.
(thickness: about 100 μm), a butyl-based pressure-sensitive adhesive (about 100 μm thick) was applied to the surface of the PET film layer, and release paper (about 100 μm thick) was adhered to form a joint tape for the heat insulating plate. (Overall thickness: about 2 mm thick). The joint tape is also of the same type. Example 2 As shown in FIG. 2, a polyethylene terephthalate (PET) film (about 35 times) was formed on one surface of the same polyvinyl chloride foam sheet (expansion ratio: about 10 times) as used in Reference Example 1.
layer), a butyl-based adhesive (approximately 100 μm thick) was applied to the other surface of the polyvinyl chloride foam sheet, and a joint tape for an insulating plate was prepared (total thickness:
About 2 mm thick). With this joint tape, the adhesive force between the adhesive and the PET film is not very strong, so it is usually wound into a coil and stored, transported, handled, etc. without the use of release paper. This type of joint tape can be unwound and used. [Comparative Example 1] A butyl-based pressure-sensitive adhesive (approximately 0.
(Thickness: 35 to 0.5 mm), and a release paper was adhered to the other surface of the foam sheet to form a joint tape of the heat insulating plate (total thickness: 8 mm). Comparative Example 2 A PET film was pressure-bonded to the EPDM foam surface (the surface opposite to the surface on which the butyl-based adhesive and release paper were provided and applied) of the joint tape of the heat insulating plate shown in Comparative Example 1 above. A joint tape (total thickness: 3 mm thickness) of the heat insulating plate was prepared. [Comparative Example 3] An acrylic pressure-sensitive adhesive (about 0.05 mm thick) was applied to one surface of a polyvinyl chloride foam sheet, and release paper was adhered to the other surface of the foam sheet. A joint tape was prepared (total thickness: about 2 mm thick, about 8 mm thick). <Test Items and Test Methods> (1) [Compression Stress Test] Test pieces (30 mm long × 30 mm wide) were prepared by the following methods, respectively, and subjected to a compressive stress test.

Table 1 shows the results. Note that, when the tapes shown in Examples 1 and 2 are used, the same results as in Reference Example 1 are obtained.

(A) Reference Example 1: 8 mm thick tape × 2 sheets (laminated) (B) Comparative Example 1: 8 mm thick tape × 2 sheets (laminated) (c) Comparative Example 3: 8 mm thick tape × 2 sheets (Lamination) Compression speed: 10 mm / min Compression rate: 30, 50, 70%

[0059]

[Table 1]

(2) [Water absorption test] The following test pieces (length 30 mm x width 50 mm) were prepared by the following method, and the water absorption (g / g) was prepared under the following conditions.
cm ³ ), in each case 0.1 g /
cm ³ .

(A) Example 1: 2 mm thick tape × 2 sheets (laminated) (b) Example 2: 2 mm thick tape × 2 sheets (laminated) (c) Comparative example 1: 8 mm thick tape × 2 sheets (D) Comparative Example 2: 3 mm thick tape x 2 (laminated) (e) Comparative Example 3: 2 mm thick tape x 2 (laminated) Immersion conditions: 20-25 ° C x 22 hours, water depth Lower 50mm,
Compression rate 30%.

The results are shown in Table 2 below.

[0063]

[Table 2]

(3) [Adhesion test] (90 ° peeling) A “stretch preventing tape” was placed on the non-adhesive surface (skin layer side) of a test piece (width 30 mm) having the thickness shown in Table 3 below.
Further, a sufficiently degreased stainless steel plate (manufactured by Norton Co., Ltd.) was adhered to the adhesive surface side of the test piece at room temperature, and 1 kg was applied between one end and the other end of the bonded product using a 5 kg roller. By applying reciprocating pressure, the elongation preventing tape, the test piece and the stainless steel plate were pressed.

After leaving the pressed product at room temperature for 24 hours,
Leave in the atmosphere at each measurement temperature for 60 minutes, 300mm /
In minutes, the peeling load (kgf / cm) at 90 ° with respect to the stainless steel plate was measured.

The results are shown in Table 3 below. In the table,
“*” Indicates that the base material was broken, and the numerical value indicates the average value of the breaking load. The test piece dimensions are as follows.

[0067]

[Table 3]

(4) [Tensile Test] Using the samples shown in Examples 1 and 2 and Comparative Examples 1 to 3,
A tensile test was performed in accordance with the “IS K 6767A method”.

The results are shown in Table 4 below. The material of each test piece,
The thickness used was the same as that in the above adhesive strength test (3).

[0070]

[Table 4]

(5) [Airtightness test] Each of the compression ratios of the following test specimens (30% compression, 50% compression, 70% At the time of compression), the air permeability (airtightness, cc / min) per unit time was determined.

The results are shown in Table 5 below. In addition, Examples 1 to
When the tape shown in FIG. 2 is used, the same result as in Reference Example 1 is obtained.

In the table, "* (measurement not possible)" indicates that the test piece has high air permeability, so that the pressure value of the portion (inside) surrounded by the square test piece is not changed. Indicates that the air pressure cannot be measured and the air permeability cannot be measured.

Compressibility: 30, 50, 70% Internal pressure: 100 mmH ₂ O Reference example 1: 4 mm thick tape × 2 sheets (laminated) Comparative example 1: 8 mm thick tape × 2 sheets (laminated) Comparative example 3: 2mm thick tape x 2 (lamination)

[0075]

[Table 5]

(6) [Water tightness test] Each of the compression ratios (30%, 50%, 70%) of the following test pieces was measured by using a square test piece with a device manufactured by Norton Corporation.
(Water pressure: water depth at the start of water leakage) was examined.

The results are shown in Table 6 below. In addition, Examples 1 to
When the tape shown in FIG. 2 is used, the same result as in Reference Example 1 is obtained.

The thickness of the test piece used is as follows. Reference Example 1: 8 mm thick tape x 2 (laminated) Comparative Example 1: 8 mm thick tape x 2 (laminated) Comparative Example 3: 8 mm thick tape x 2 (laminated)

[0079]

[Table 6]

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a preferred embodiment of a joint tape according to one embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view showing a preferred embodiment of a joint tape according to one embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view of the joint tape according to one embodiment of the present invention, showing a mode in which release paper is stuck on the surface of the waterproof film layer of the joint tape shown in FIG. 2;

FIG. 4 is a cross-sectional view of a main part showing a stretched structure of a heat insulating plate using a joint tape according to one embodiment of the present invention.

FIG. 5 is a perspective view of an essential part showing a stretched structure of a heat insulating plate using a joint tape according to one embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part showing a stretched structure of a two-layer heat insulating plate using a joint tape according to one embodiment of the present invention.

FIG. 7 is a cross-sectional view of a main part showing a stretched structure of a two-layer heat insulating plate using the same joint tape according to one embodiment of the present invention.

FIG. 8 is a perspective view of an essential part showing a structure for extending a heat insulating plate on a roof using joint tape according to one embodiment of the present invention.

FIG. 9 is a perspective view of an essential part of a conventional heat insulating plate extending structure.

[Explanation of symbols]

1 ··· pillar, 2 ··· stud, 3, 5 ··· heat insulating plate, 11, 30 ··· joint tape, 40 ··· base material layer, 40A ··· base material Upper surface of layer, 40B... Lower surface of substrate layer, 50... Waterproof film layer, 50A... Upper surface of waterproof film layer, 50B. ··· adhesive layer, 60A ··· upper surface of adhesive layer, 60B ··· lower surface of adhesive layer, 70 ··· release paper, 80 ··· release agent, m, m ₁ , m ₂ ... gap.

Claims (6)

[Claims] An insulated plate is provided outside a butt portion of a heat insulating plate so as to close a gap formed in a butt portion of the heat insulating plate formed by extending an insulating plate in a plane direction on the outside of a columnar body constituting a wooden building. A joint tape of a heat insulating plate to be attached, wherein the joint tape is a base layer made of a soft foam having closed cells, and a waterproof film layer provided on one surface of the base layer, A joint tape for an insulating plate, comprising: a pressure-sensitive adhesive layer provided on the surface of the waterproof film layer; and release paper adhered to the surface of the pressure-sensitive adhesive layer. 2. A heat insulating plate, which is formed by extending a heat insulating plate in a plane direction on the outdoor side of a columnar body constituting a wooden building, so as to close a gap formed at a butt portion of the heat insulating plate. A joint tape for an insulating plate to be attached, wherein the joint tape is a base layer made of a soft foam having closed cells, an adhesive layer provided on one surface of the base layer, A joint tape for a heat insulating plate comprising a waterproof film layer provided on the other surface of the base material layer. 3. The joint tape according to claim 1, wherein the flexible foam is made of a vinyl chloride resin. 4. The joint tape according to claim 1, wherein the waterproof film layer is made of polyethylene terephthalate. 5. The joint tape according to claim 1, wherein the pressure-sensitive adhesive layer is of a butyl rubber type. 6. The joint tape according to claim 2, wherein a release agent is further applied to the surface of the waterproof film layer.