JPS5854153A - Laminate waterproof execution - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated waterproof construction method, and more particularly to a construction method for laminating and bonding two or more waterproof sheets together in order to waterproof a base surface.

2. Description of the Related Art Conventionally, when waterproofing the subsurface of a building structure, water tank, etc., a waterproof sheet is sometimes developed and pasted onto the subsurface.

Waterproofing construction methods using this tarpaulin sheet include the so-called single-layer construction method, which waterproofs a large area by laminating one sheet of tarpaulin together, and the so-called single-layer construction method, which waterproofs a large area by pasting together two or more tarpaulin sheets. There is a multilayer construction method.

Among the above, the former single-layer construction method has the advantage of being able to waterproof a vast base in a relatively short period of time, but the sheet used for single-layer construction has a thickness of around 1.0 fins. Since it is a polymer sheet, it is strong enough to prevent holes, and
There was a problem in that it was difficult to ensure watertightness at the bonding points at the joints at the ends of the sheets, and water often leaked from the joints.

On the other hand, the latter multi-layer system avoids the risk of water leakage as with single-layer systems by shifting the joints of the upper and lower waterproof sheets, but the adhesive used to bond the upper and lower waterproof sheets together avoids the risk of water leakage. The lower layer of the waterproof sheet may swell due to the solvent, causing so-called blistering, which may make it impossible to bond the upper layer of the waterproof sheet together watertightly. This has the disadvantage that it is difficult to reliably perform bonding and bonding.

Furthermore, when the sheets are spread out and stacked on top of each other, air tends to be trapped between the upper and lower sheets, making it impossible to securely bond them together.

In view of the above-mentioned problems, the present invention aims to provide a laminated waterproofing construction method that can completely adhere to each layer without intervening air at the bonding interface or blistering of each layer in a multilayered construction method that can perform waterproofing more completely. A first waterproof sheet having self-adhesive properties on both sides is spread and adhered at room temperature on a base surface on which a semi-dry or already dried adhesive layer has been applied, and then the first waterproof sheet is A second waterproof sheet, which is made by laminating a polymer sheet, a self-adhesive layer, and a mesh sheet in this order, on the waterproof sheet surface is laminated via the mesh sheet surface of the second waterproof sheet. That is.

Next, the present invention will be explained with reference to explanatory diagrams showing the state of implementation.

The drawing is a perspective view showing a state in which the invention is implemented.

In the method of the present invention, an adhesive is coated on the base surface 1 and left to be semi-dry or already dried to form an adhesive layer that still retains its tackiness, or an adhesive layer that does not exhibit tackiness when no pressure is applied. 2
After forming the first waterproof sheet 3, which has self-adhesive properties on both sides 3A at room temperature, while peeling off the release paper 3B temporarily attached to its surface, spread it out without entrapping air at the adhesive interface. After adhering the first waterproof sheet 3, a second waterproof sheet 4 is attached thereon by laminating a polymer sheet 4A, a self-adhesive layer 4B, and a mesh sheet 40 in this order. They are bonded together through the 40 sides (reticular sheet (4)).

In the above, the first waterproof sheet 3 is formed entirely of a rubber sheet such as an unvulcanized or semi-vulcanized butyl rubber sheet in order to impart self-adhesive properties to both sides, or
Alternatively, it can be formed by applying adhesive to both sides of a polymer sheet.

Further, the polymer sheet 4A of the second waterproof sheet 4 is, for example,
Vulcanized rubber sheets, plastic sheets such as vinyl chloride and polyethylene, and polymer sheets such as asphalt roofing are suitable.

In addition, the mesh sheet 40 of the second waterproof sheet 4 is a combination of water-resistant fibers or films in a lattice shape, and is adhered to the second waterproof sheet 4 via a self-adhesive adhesive layer 4B. There is.

This invention is configured as described above.

After pasting the first tarpaulin sheet on the base surface, the second tarpaulin sheet can be pasted without applying any adhesive liquid, so unlike the case where adhesive is used, the second tarpaulin sheet can be pasted on the base surface. No blister caused by swelling,
In addition, since the second waterproof sheet is pasted onto the first waterproof sheet through the mesh sheet, air escapes through the mesh of the mesh sheet, and air is not trapped, creating an airtight structure. The sheets can be stacked in this state.

Further, since the first waterproof sheet and the second waterproof sheet are integrally bonded together by the self-adhesive layer, reliable watertightness is ensured.

[Brief explanation of drawings]

The figure is a perspective view showing the state of implementation of the invention. 1... Base surface, 2... Adhesive layer, 3... First waterproof sheet), 3A... Self-adhesive surface, 4... Second waterproof sheet,
4A...Polymer sheet, 4B...Self-adhesive layer, 4C...
-Mesh sheet.

Claims (1)

[Claims] (1) A first waterproof sheet, which has self-adhesive properties on both sides at room temperature, is spread and adhered to the base surface on which a semi-dry or already dried adhesive layer has been applied, and then the first waterproof sheet is attached to the surface of the first waterproof sheet. Laminated waterproofing characterized by laminating a second waterproof sheet formed by laminating a polymer sheet, a self-adhesive layer, and a mesh sheet in this order through the mesh sheet surface of the second waterproof sheet. Construction method.