JPS62160350A - Waterproof sheet and waterproof construction method using said sheet - 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] <Industrial Application Field> The present invention relates to a new waterproof sheet used for waterproofing buildings and a waterproof construction method using the sheet '2.
be.

<Prior art and its problems> Generally, waterproof construction using a waterproof sheet is carried out by overlapping the ends of the sheet and pasting it onto a base surface with an adhesive.

However, since the sheet is usually a sheet-like material having a thickness of about 0.5 to 3 mm, when the ends of the sheets are overlapped and connected as described above, the thickness of the upper sheet is This creates a step that is just the same amount.

Therefore, if an external impact is applied to such a stepped portion during walking, etc., the sheet may be peeled off or damaged from the connecting portion of the sheet, resulting in a decrease in waterproof performance.

On the other hand, as a method to solve this problem, it is conceivable to use a waterproof coating material in combination. However, it is difficult to form a thick coating film because the coating film waterproofing material tends to be thickly coated, so it is not sufficient to protect the above-mentioned connections, and the coating film waterproofing material is originally a waterproof material. The reality is that sheet waterproofing and coating waterproofing are generally difficult to use together because of their lack of adhesion.

Means for Solving the Problems> The present invention has been made as a result of intensive studies in view of the state of the prior art as described above, and its gist is that porous holes are formed on at least one side of a polymeric sheet. A waterproof sheet characterized in that a flexible sheet material is provided on at least one end of the sheet so as to form an extension, and at least one side of a polymeric sheet is provided on a base surface, either directly or through an adhesive. A first waterproof sheet comprising a porous sheet material so as to form an extension at at least one end of the sheet is pasted first with the sheet material facing upward; The sheet is laminated on one end of the first waterproof sheet so that the extending portion of the sheet material faces the bottom side, and is then pasted, and then a coated film waterproofing material is applied over this. This is a waterproofing construction method.

<Operation and structure of the invention> In the waterproof sheet of the present invention, the porous sheet material provided on the polymer sheet forms an extension at one end of the sheet, so that the sheet material faces the bottom side. By overlapping and connecting the waterproof sheets, the stepped portion of the sheet at the connecting portion can be reinforced by the extending portion, and the extending portion also functions as a support material for the waterproof coating material. The waterproof coating material can be formed thickly at the step portion, and therefore the step can be substantially filled.

Hereinafter, the present invention will be specifically explained using the drawings.

In Fig. 1, 1 is a polymeric sheet with a thickness of 0.5 to 3 mx, such as a vulcanized or unvulcanized rubber sheet mainly made of ethylene-propylene rubber, butyl rubber, chloroprene rubber, etc. Vinyl chloride, ethylene-
A plastic sheet such as vinyl acetate copolymer can be used.

A porous sheet material 2 is laminated and bonded to one side of the sheet 1, and an extending portion 2a is formed at one end 11 in the length direction of the sheet 1. The porous base material constituting the material 2 is selected from materials that have excellent adhesion to the waterproof coating material described below, such as nonwoven fabrics, woven fabrics, paper, and cheesecloth made of natural and/or synthetic fibers. 5 to 5, mainly consisting of mesh-like materials such as rubber and/or synthetic resin, etc.
Open-cell foam, etc. that has been expanded to about 0 times the thickness of 0.05
-: A sheet formed into a sheet of about 3 mm is suitably used. The extending portion 2a of the material 2 is usually 0.5 to 5 cr, although it varies depending on the length and thickness of the sheet 1.
It is preferable that the width is about the same as IL. Note that a pressure-sensitive adhesive layer mainly made of rubber and/or synthetic resin may be provided on the other surface of the polymer sheet 1.

FIG. 2 shows another example of the waterproof sort of the present invention, in which a porous sheet material 20 is superimposed on both sides of a polymeric sheet 1 to form an integral extension part 2a. In this way, the sheet material 20.20 is coated on both sides of the polymeric sheet 1.
In the waterproof sheet provided with this, one of the sheet materials 20 can be used as the base surface side, so it has the following advantages. That is, since the material 20 forms a breathable layer when bonded to the base surface using an adhesive, air may be trapped between the waterproof sheet and the base surface during construction, and steam generated from the base surface after construction may be trapped. Even if moisture evaporates and expands as the outside temperature rises, so-called blistering will not occur in the sheet, and since the material 20 forms a buffer layer, cracks will not occur in the underlying surface. The water does not propagate to the sheet 1, and there is no risk of the waterproof sheet breaking.

Next, a waterproofing construction method which constitutes another aspect of the present invention will be explained with reference to FIG. First, a commonly known adhesive C such as a solvent-based adhesive or an emulsion-based adhesive is applied to a base surface B such as a concrete or mortar surface, usually through a primer. The waterproof sheet shown in the figure is used as a first waterproof sheet A1, and the sheet material 2 is pasted first with the upper surface side. In addition, when a pressure sensitive adhesive layer is provided on the sheet, the adhesive C on the base surface B
Can be pasted directly without needing to apply. Next, a similar waterproof sheet is used as a second waterproof sheet A2, and the first waterproof sheet is made such that the extending portion 2a is on the bottom side at one end 11 where the extending portion 2a of the sheet material 2 is formed. Lay it on one end of the sheet A1 and paste it afterwards. From this north, solutions, latex or emulsions mainly made of polyacrylic, polyurethane, tar urethane, chloroprene, chlorosulfonated polyethylene, epoxy, tar epoxy, polysulfide, styrene butadiene rubber, polyvinyl acetate, polyvinyl chloride, etc. Complete the waterproofing process I by applying type waterproof coating material M. Therefore, the level difference formed by overlapping the sheet ends is filled by thickly coating 3 the waterproof coating material M due to the support function of the extending portion 2a, and the seamless sheet connection is achieved. Configure. In addition, the coating film waterproof material M is embedded in the rough textured roughness or pores of the porous base material constituting the sheet material 2, and the waterproof sheet 1-A
It coagulates strongly with 1 and A2. Please note that
If the waterproof sheets A1 and A2 are those in which the sheet material 2 is provided on the screen of the polymeric sheet 1, it is effective in preventing blistering and breakage of the waterproof layer as described above.

<Effects of the Invention> The present invention is constructed as described below, and since it is used in combination with a waterproof coating material to form a strong sheet connection with virtually no level difference, it is waterproof even when subjected to external impact. To provide a tarpaulin sheet and a waterproofing construction method that can provide a good waterproofing effect over a long period of time without causing the sheet to be peeled off or damaged from the connecting parts.1.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an example of the waterproof sheet of the present invention;
FIG. 2 is a partial cross-sectional view showing another example of the waterproof sheet of the present invention, and FIG. 3 is a partial cross-sectional view showing an example of waterproof construction using the waterproof sheet of the present invention. 1... Polymer sheet 2... Porous sheet material 2a... Extension portion

Claims (1)

[Scope of Claims] 1) A waterproof sheet characterized in that a porous sheet material is provided on at least one side of a polymeric sheet so as to form an extension at at least one end of the sheet. 2) The waterproof sheet according to claim 1, wherein the porous sheet material is provided on both sides of the polymer sheet. 3) A first waterproof sheet in which a porous sheet material is provided on at least one side of a polymeric sheet so as to form an extension at at least one end of the sheet, either directly or via an adhesive, on the base surface. The sheet material is pasted first so that it is on the top side, and the second waterproof sheet is overlaid on one end of the first waterproof sheet so that the extending part of the sheet material is on the top side. A waterproofing construction method characterized by pasting the adhesive and then applying a coating film waterproofing material over the adhesive. 4) The waterproofing construction method according to claim 3, wherein the waterproof sheet is one in which a porous sheet material is provided on both sides of a polymeric sheet.