JP2001132845A - Watertight mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a watertight mat permitting no infiltration of rainwater via base cloth even if press-fitting failure is caused in a joining part between aluminum frame materials. SOLUTION: A watertight mat is formed by being dried after impregnating base cloth 3 with an elastomer solution including a water swelling agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight mat which is filled at a joint of an aluminum sash to ensure watertightness and airtightness.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned water-tight mat is adhered to a joining surface of an aluminum frame material which is formed in a sheet shape and which is to be joined by an adhesive, and is further fixed by pressure by screwing. The watertight mat is formed by sandwiching a flexible base cloth for securing strength between water-blocking layers made of an elastomer such as a vulcanized synthetic resin, unvulcanized rubber, and vulcanized rubber, in order to secure strength. I have. The joining portion using such a watertight mat varies in size and shape from a narrow one to a wide one according to the joining mode, and a sheet-like watertight mat is appropriately cut and used.

[0003]

As a result, at the cut portion of the watertight mat, the base fabric between the water-impervious layers is exposed, and the permeation of water from the exposed portion into the inside of the watertight mat is permitted. Since the watertight mat is interposed in the gap between the joints by the press-fitting action of two or three screws used for joining the aluminum frame material, when the joint surface is wide or the shape of the joint surface is complicated, As a result, sufficient pressure cannot be obtained, and rainwater or the like penetrates into the base fabric, and leaks indoors due to capillary action. In particular, when bonding with the cut surface of the aluminum frame material, the crimping failure often occurs. On a rainy day with strong wind, the wind pressure causes a more significant displacement at the joint of the aluminum frame material. In addition, the crimping force of the joining portion is reduced, and the leakage of rainwater is increased. In addition, poor crimping often occurs due to the variation in the tightening condition of the screws.

[0004] The present invention has been made in view of the above-mentioned circumstances, and it is possible to allow infiltration of rainwater or the like through a base cloth even if a bonding failure between aluminum frame members occurs as described above. The purpose is to provide a water-tight mat without any.

[0005]

A watertight mat according to the present invention made to solve the above problems is characterized in that a base cloth is impregnated with an elastomer solution containing a water swelling agent and dried. The base fabric is a flexible fabric,
For example, it refers to a woven fabric, a nonwoven fabric, or the like. The water swelling agent is a resin such as a polymer, and is, for example, an acrylate superabsorbent resin. Elastomer is a general term for a material having the property that when a physical pressure is applied in a solidified state, that part is dented, and when the pressure is removed, the original state is restored. The elastomer solution refers to an elastomer dissolved in a liquid with a predetermined solvent. Depending on the storage state, transportation state, etc., a water barrier layer may be applied to at least one surface of the base fabric in order to prevent the base fabric from being moistened. The water-impervious layer refers to a sheet-like layer made of an elastic and water-tight material such as an elastomer such as a closed-cell synthetic resin, vulcanized rubber, or unvulcanized rubber.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a watertight mat according to the present invention will be described below with reference to the drawings. Fig. 1 (c) (d)
In the example shown in FIG. 2, the thickness is 0.9 mm, and the weight is 120 g / m ^2.
Is used as a base cloth 3 and a polymer (E)
PDM: Ethylene propylene / diene copolymer), filler, softener, vulcanizing agent, accelerator, processing aid, dehydrating agent and water swelling agent dissolved in about 4 times the solvent (troll etc.) After impregnating the resulting elastomer solution and drying them, a solution obtained by dissolving the compound with about twice the amount of a solvent is applied to both sides of the base fabric 3 and dried. Thickness: A rubber sheet having a thickness of about 0.1 mm is placed, and the rubber is heated and vulcanized to form the water barrier layers 1 and 2. Finally, the surface of each of the water barrier layers 1 and 2 is assembled. At the time, a watertight mat formed by applying an adhesive to the aluminum sash, applying release paper on the adhesive surface to prevent sticking up to the time of assembly (not shown), and punching it into an arbitrary shape It is.

[0007]

[Table 1]

[0008] The components of the elastomer solution are exemplified in Table 1, wherein 100 phr of the polymer is mixed with 300 s of a water swelling agent (such as a chlorine acrylate superabsorbent resin).
hr. In the case of an unvulcanized product, a vulcanizing agent / accelerator and a dehydrating agent are not blended and the heating / vulcanizing step is omitted. The water swelling agent dissolved in the elastomer solution is fixed to the fibers of the base fabric by the compound, and serves to prevent the flow of water due to the expansion of the water-swelling agent containing water.

As shown in FIG. 2, the watertight mat 4 is adhered to the joining area between the inner surface and the end surface of the aluminum frame members 5, 6 with the release paper removed, and both are screwed to each other. It is crimped as shown in FIG. At this time, although the base fabric 3 communicates with the front and back sides of the frame, the water swelling agent impregnated in the base fabric expands due to the inclusion of moisture, and is combined with the elasticity of the solidified polymer. The flow of moisture through the cloth 3 is cut off.

The watertight mat according to the present invention can be expected to have sufficient watertightness without the provision of the water blocking layers 1 and 2 as described above (see FIG. 1 (a)). Fig. 1
(B) It is desirable to appropriately provide a water barrier layer as in the examples of (c) and (d). The material and structure of the water-impervious layer and the material and structure of the base cloth 3 may be appropriately set as necessary. Depending on the application, not only the paste impregnated in the base cloth 3 but also the water-impervious layer In some cases, a water swelling agent is also added to the overcoating paste applied to the surfaces of the layers 1 and 2 and the water shielding layers 1 and 2.

[0011]

As described above, when the watertight mat according to the present invention is used, it can be inserted into a relatively wide joint, a joint having a complicated shape, or a case where the screw is insufficiently tightened. Even if the force for pressing the watertight mat is insufficient, the internal pressure of the watertight mat increases due to the expansion of the water swelling agent impregnated in the base cloth, thereby preventing the invasion of moisture into the room due to the capillary phenomenon or the like. it can.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one example of a watertight mat according to the present invention.

FIG. 2 is a perspective view showing an example of a construction mode of a watertight mat according to the present invention.

FIG. 3 is a perspective view showing an embodiment of a watertight mat according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water impervious layer 2 Water impervious layer 3 Base cloth 4 Watertight mat, 5 Aluminum frame material, 6 Aluminum frame material

Claims (2)

[Claims] 1. A watertight mat comprising a base fabric (3) impregnated with an elastomer solution containing a water swelling agent and dried. 2. The watertight mat according to claim 1, wherein a water impermeable layer is applied to at least one surface.