JPH0410034Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heat insulating waterproof panel capable of detecting pinholes in a waterproof layer.

Generally, when insulating and waterproofing flat roofs, heat storage tanks, etc., for example, insulation materials are first laid on the surface of the concrete walls that make up these flat roofs, etc., and then a waterproof sheet is stretched over the surface of these insulation materials. ing. However, conventionally it has not been possible to detect pinholes that occur in the tarpaulin during construction or during use after construction, and therefore, if such pinholes are found in the tarpaulin, the intended waterproofing and There was a problem that the insulation effect could not be obtained.

The purpose of this invention is to solve the above-mentioned problems, to make it extremely easy to perform insulation waterproofing on flat roofs, etc., and to easily detect pinholes that occur in the waterproof layer after construction. We are trying to provide a thermally insulated waterproof panel that can reliably achieve this.

The configuration of this invention will be explained below based on the embodiments shown in the drawings.

In FIG. 1 showing the first embodiment of this invention,
The heat insulating waterproof panel 1 according to this invention has a heat insulating layer 2
, a waterproof layer 3 disposed on one side thereof, and a conductive layer 4 interposed between the two are laminated and integrated.

Here, the heat insulating material constituting the heat insulating layer 2 is as follows:
For example, foams of polystyrene, polyvinyl chloride, polyurethane, polyethylene resin, etc. are used, and polystyrene foams are particularly preferred because they are inexpensive.

The thickness of the heat insulating layer 2 varies depending on the use of the panel 1, but is usually about 25 to 100 mm.

In addition, the waterproof sheet constituting the waterproof layer 3 is as follows:
Sheets made of thermoplastic synthetic resins such as soft polyvinyl chloride, polyethylene, and polypropylene, non-vulcanized rubber sheets, rubber asphalt sheets, etc. are used, but soft polyvinyl chloride sheets are especially used for their adhesive properties. It is preferable to do so. The thickness of this waterproof layer 3 is usually about 1.0 to 2.0 mm.

In addition to metal foil such as aluminum foil, the conductive layer 4 is composed of a conductive sheet formed by vapor-depositing a metal such as aluminum or copper onto a film of synthetic resin such as polyester resin. When a metal foil is used as the conductive layer 4, its thickness is usually about 5 to 30 μm.

Further, as the adhesive constituting the adhesive layer 5, epoxy, urethane, and rubber adhesives are used. It is preferable that the heat insulating layer 2 and the conductive layer 4 and the conductive layer 4 and the waterproof layer 3 are bonded together over the entire surface using an adhesive, but in some cases, only the peripheral edges and other necessary parts may be bonded. good.

Insulating and waterproofing work for flat roofs, heat storage tanks, etc. is carried out using the above-mentioned insulating and waterproofing panel 1, for example, in the following manner.

First, the insulating and waterproof panels 1 are laid out in order so as to cover the required surfaces of the flat roof or the reinforced concrete wall that constitutes the heat storage tank, and then, while holding them down from above using, for example, an appropriate joint plate, the panels are connected with open leg nails. Fix to the concrete wall using fixing fittings such as curl plugs. At this time, the conductive layer 4 is grounded to the reinforced concrete wall by the fixture.
Next, the joints between the abutting ends of the heat insulating and waterproof panels 1 that are adjacent to each other are closed using strip-shaped waterproof sheet pieces made of the same material as the waterproof layer 3.

After completing the above-mentioned insulation and waterproofing work for flat roofs, etc., the waterproofing layer 3 on the surface of the insulation and waterproofing panel 1 may be damaged during related work such as scaffolding dismantling work and equipment piping work, so all work must be completed. rear,
Check the entire surface using the specified flaw detector. That is, a tip inspection brush of a flaw detector is placed on the surface of the waterproof layer 3 of each panel 1, and a predetermined high voltage is applied to it. Then, if there is no scratch on the waterproof layer 3, no discharge phenomenon will occur, but if there is a scratch on the waterproof layer 3, a discharge phenomenon will occur between the inspection brush and the conductive layer 4, and a spark of discharge will be produced. , the detection buzzer of the flaw detector sounds, and the flawed part of the waterproof layer 3 is scorched by electric discharge. This allows the location of the damaged part to be easily located. After checking, if there is a damaged part of the waterproof layer 3, it is repaired as appropriate by, for example, covering and pasting a piece of waterproof sheet of a required size over the damaged part.

In addition, such flaw detection work should be carried out not only immediately after insulation and waterproofing construction is completed on flat roofs, etc., but also after a certain period of time has passed to detect pins in the waterproof layer 3 that may have occurred later during cleaning or other work on flat roofs, etc. Holes can be detected easily as well, and maintenance management of flat roofs and the like is easy.

Note that when the conductive sheet constituting the conductive layer 4 of the heat-insulating waterproof panel 1 is made of metal foil such as aluminum and has high conductivity,
It is not necessary to ground the conductive layer 4, but if the conductivity is low, it is necessary to ground the conductive layer 4.

FIG. 2 shows a second embodiment of this invention. Here, the difference from the first embodiment is that the conductive layer 4 of the heat-insulating waterproof panel 1 is composed of conductive fibers alone or a mixture of conductive fibers and thermoplastic fibers with a low softening point. The point is that a conductive sheet made of a non-woven fabric is used. A conductive sheet made of such a nonwoven fabric is bonded to the heat insulating layer 2 and the waterproof layer 3 via the adhesive layer 5.

Here, as the conductive fibers, copper-adsorbing fibers, metal-plated fibers, carbon composite fibers, metal-deposited fibers, thin metal wires, etc. are used. Further, as the thermoplastic fiber with a low softening point, acrylic fiber, polyvinyl chloride fiber, polyolefin fiber, nylon fiber, polyester fiber, etc. are used. The conductive fibers are used, for example, in a proportion of about 3 to 200 g/m ² . Further, the thickness of the adhesive layer 5 is approximately 0.1 to 0.3 mm. Of course, these numbers are not limiting.

Since the conductive nonwoven fabric has many gaps, the heat insulating layer 2 is made of expanded polystyrene, and the waterproof layer 3 is made of a sheet of plasticizer-containing resin such as soft polyvinyl chloride resin. In this case, the plasticizer in the waterproof layer 3 may migrate to the heat insulating layer through the gaps between the nonwoven fabrics, causing the heat insulating layer to swell and soften. Therefore, it is desirable to use an epoxy adhesive as the adhesive layer 5 because it can prevent such migration of the plasticizer.

The procedure for insulating and waterproofing a flat roof, etc. using the heat insulating and waterproof panel 1 of this second embodiment is as described in the above example 1.
This is exactly the same as in the case of . In addition, since the conductive layer made of non-woven fabric of conductive fibers has relatively low conductivity,
It is desirable to ground the conductive layer 4 to the reinforced concrete wall using a fixture or the like.

Note that various other conductive materials can be used as the conductive material constituting the conductive layer 4.

FIG. 3 shows a third embodiment of this invention. Here, the difference from the first embodiment is that the heat-insulating waterproof panel 11 has waterproof layers 3 made of waterproof sheets on both sides of the heat-insulating layer 2 having relatively high strength.
and a conductive layer 4 are respectively provided.

Such a heat insulating and waterproof panel 11 can be used, for example, as a partition wall inside a large refrigerator or freezer.

As described above, the heat-insulating waterproof panel according to this invention has a heat-insulating layer 2, a waterproof layer 3 disposed on at least one side of the heat-insulating layer 2, and a conductive layer 4 interposed between the two. When insulating and waterproofing flat roofs, heat storage layers, etc., all you have to do is lay out the above-mentioned insulating and waterproof panels and fix them to the concrete wall, so the work is very easy. The pinholes that occur can be easily detected with a flaw detector, and if a pinhole is found, the waterproofing layer 3 can be repaired as appropriate, so insulation and waterproofing of flat roofs, etc. can be reliably achieved. . In addition, pinholes in the waterproof layer 3 that occur later due to cleaning or other work can be easily detected by performing the same inspection with a flaw detector not only immediately after insulation and waterproofing construction but also after a predetermined period of time has passed. This has the effect that maintenance and management of flat roofs etc. can be performed easily and reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention, and FIG. 1 is a sectional view of the first embodiment of the invention, and FIG. 2 is a cross-sectional view of the second embodiment.
FIG. 3 is a sectional view of the product of the present invention according to the third embodiment. 1, 11...Insulating waterproof panel, 2...Insulating layer,
3... Waterproof layer, 4... Conductive layer, 5... Adhesive layer.

Claims (1)

[Scope of utility model registration request] A heat insulating waterproof panel in which a pinhole in the waterproof layer can be detected, in which a heat insulating layer 2, a waterproof layer 3 disposed on at least one side of the heat insulating layer 2, and a conductive layer 4 interposed between the two are laminated and integrated.