JPS596987B2 - Waterproofing method using composite sealing material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new waterproofing method between panels or between abutting members such as panels and frames (or supports). The present invention provides a waterproof construction method in which a sealing material is interposed and crimped to improve watertightness between abutting members.

Conventionally, watertightness between abutting members has been achieved by interposing unvulcanized rubber tape or polyethylene foam tape with a thin layer of adhesive applied to one side of the foam tape.
The rubber tape does not have sufficient watertightness because it flows out when crimped, and the foamed tape cannot absorb dimensional errors of parts or tightening errors during crimping, so it requires complicated use such as amorphous sealing materials. It had the disadvantage of requiring waterproofing methods.

The present invention provides a waterproofing method using a novel composite sealing material that solves the drawbacks of the prior art. A composite consisting of a regular elastic layer A and a viscous layer B formed in close contact with the layer surface between the members and having an apparent elastic modulus of 0.3 to 10 kg/i at room temperature according to the calculation method defined below. A sealing material is interposed, and then the distance between the members is reduced, the sealing material is compressed, and the layer B is deformed and flows to cover the exposed end surface of the layer A.

Examples of the present invention will be explained in detail below with reference to the drawings.

Figures 1A, 1C, 2C show typical examples of composite sealing material H used in the waterproofing method of the present invention.

In FIG. 1A, A is a regular elastic layer, and the layer A is made of rubber and/or synthetic resin foam (foaming ratio: about 3 to 5).
0 times), is made of elastic materials such as felt, nonwoven fabric, and synthetic leather, and its thickness is approximately 0.1 to 8 mr/
L is preferred.

As the layer A, a mixture of rubber and a water-repellent and sticky softening substance and/or resin is foamed and vulcanized.
When using a rubber-based foam having the above-mentioned softening substance and/or resin integrated with the foamed structure with a foaming ratio of about 2 to 15 times, the foam itself becomes Since it has excellent waterproof properties, a more sufficient waterproof effect can be expected.

B is a viscous layer that is formed in close contact with the surface of layer A and has the ability to deform and flow under pressure, and layer B has an apparent elastic modulus in the range of 0.3 to 10 kg/crit at room temperature ( If it is outside this range, it is undesirable because it is too soft and may sag after construction, or it is too hard and the deformation flow rate is slow.

), for example, it is composed of a shaped sealing material mainly composed of unvulcanized butyl rubber or ethylene-propylene terpolymer rubber, and its thickness is about 0.
．． 2 to 10 mm is preferred.

Note that 1 in the figure is release paper.

The opening in Figure 1 shows another example, in which layer B (
The thickness of each layer is 0.2 to 5 mm), and in this configuration, layer B is attached to both of the abutting members (not shown), and the watertightness at this interface is excellent. preferable.

Figure 1 C shows layer A on both sides of layer B (thickness 0.1 to 4
mm), and this structure has the advantage that release paper 1 for protecting layer B is unnecessary and handling is convenient.

Fig. 1-2 shows an example in which a sheet or film-like material 2 (thickness 0.01 to 1 mm) having voids such as cheesecloth, plastic net, nonwoven fabric, or foamed film is interposed between the layers of layer B. , the sheet or film-like material 2 is layer B
This effectively prevents the viscous material constituting the material from flowing too much and impairing waterproof properties at the interface.

The film-like material 2 can also be applied to the composite sealing material H having the configurations shown in FIG. Of course, it may also be fixed to the sides (including the sides).

FIG. 2 shows an example of the waterproofing method of the present invention, and this method will be explained below.

A composite sealing material H having the shape shown in Fig. 1 A is interposed between panels Y and Y', and then bolts (nuts) are inserted.
Tighten Z to reduce the space between panels Y and Y', apply pressure to sealant H, deform and flow layer B, and form layer A.
A covering band B' is formed on the exposed end surface A' of the material to obtain waterproof properties.

In addition, in the waterproofing method of the present invention, although not shown in the drawings, it is desirable to use a spacer to prevent the composite sealing material H from being unnecessarily crimped, and the spacer is attached to the sealing material H in advance. be able to.

In addition to the above-mentioned tightening method, methods for applying pressure to the composite sealing H interposed between the members include using the weight of the panel itself or the fitting force when installing the panel.

Note that the above-mentioned "apparent elastic modulus at room temperature" is 20℃ x 6
5%R. 50ml of sample in H atmosphere
This value was obtained by expanding at a speed of 71 and using the formula below.

However, F: Force required to stretch the sample (kg) S: Cross-sectional area of the sample (cr?L) △l: Stretched length of the sample l = Original size of the sample As described above, the waterproofing method of the present invention A functional composite sealant is crimped between panels or between abutting members such as panels and frames (the abutting shapes can be horizontal, vertical, T-shaped, cross-shaped, Y-shaped, etc.). Watertightness is maintained by the deformation and flow of the viscous material layer, and the waterproofing work is simple because it only requires intervening the composite material.

[Brief explanation of the drawing]

Figures 1A, 1C, 2A and 2B are cross-sectional views showing an example of a composite sealing material used in the present invention, and Figure 2 is a partial cross-sectional view of a waterproofing method showing an example of the present invention. A: Regular elastic layer, B: Viscous layer, H: Composite sealant, 2: Sheet or film-like material.

Claims (1)

[Scope of Claims] 1. A regular elastic layer A is formed in close contact with the layer surface between panels that require watertightness or between panels and a contact member such as a frame at room temperature according to the calculation method defined in the main text. A composite sealing material consisting of a viscous material layer B having an apparent elastic modulus of 0.3 to 10 kg/7 is interposed, and then the distance between the members is reduced and the sealing material is crimped to form the layer B. A waterproofing method characterized in that the exposed end face of the layer A is covered by deforming and flowing the layer A. 2. A waterproofing method using a composite sealing material according to claim 1, wherein the composite sealing material has a structure in which layer B is formed on both sides of layer A. 3. A waterproofing method using a composite sealing material according to claim 1, wherein the composite sealing material has a structure in which layer A is formed on both sides of layer B. 4. A waterproofing method using a composite sealing material according to claim 1, wherein layer B has a structure in which a sheet or film-like material having voids between layers or on the surface is interposed and/or fixed.