JPH04164989A - Water-swelling open-cell sponge plate - Google Patents

Abstract

PURPOSE:To obtain the title plate which can bar the passage of large-area or large-volume water, is excellent in the ability to follow up the profile of a waterstop section at an initial compression and has a small load required for an initial compression by mixing a highly water-absorptive resin and a foaming agent and subjecting the resultant mixture to foam-molding in a flat form. CONSTITUTION:A water-swelling open-cell sponge plate is produced by mixing a highly water-absorptive resin and a foaming agent and subjecting the resultant mixture to foam-molding in a flat form.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is capable of discharging water over a large area and in a large volume, has good followability to a water stop part during initial compression, and has a low load required for initial compression. It is placed between a small water-swellable single-cell sponge board.

<Prior art> Conventionally, as shown in Fig. 4 and Fig.
, No. 3 is a string-like sponge rubber or hard rubber containing water-swellable resin obtained by continuous vulcanization, and No. 6
As shown in the figure, a water-stopping material made of hard rubber plate containing water-expandable resin obtained by sheet vulcanization (raw rubber material is placed in a mold and vulcanized after adding a mold pattern) is used. ing. However, these conventional water stop materials 2.3.4 have problems in that their ability to follow the water stop portion during initial compression is poor and the load required for initial compression is large. Moreover, none of the conventional products is capable of stopping water over a large area and large volume.

<Invention tries to solve! ! From the above, we have created a water-swellable single-cell sponge that can stop water over a large area and large volume, has good followability to the water stop area during initial compression, and requires a small load for initial compression. A board is required.

An object of the present invention is to provide a water-swellable single-cell sponge board that solves the above problems.

<! ! Means for solving the problem〉 Explain with reference to the drawings. In order to achieve the above object, the water-swellable single-cell sponge board 1 according to the present invention is formed by mixing a super absorbent resin and molding it into a flat plate shape. Further, the water-swellable single-cell sponge plate 1 according to the present invention is formed by mixing a foaming agent, expanding the foam, and forming it into a flat plate shape.

〈Function〉 The water f# tension wheel single cell sponge board, which is configured like a queen, is flat and can stop water over a large area and large volume, and has excellent followability to the water stop part during initial compression. It has good conformability, requires less load for initial compression, and has better water release during initial compression than hard rubber. Others, Figures 2 and 3
r! ! As shown in J, by punching this water-swellable single-cell sponge plate 1, water supply materials 1a and 1b are formed to accommodate water-stopping surfaces of complex shapes that cannot be accommodated with string-like materials. can do. Also,
By slicing the original water-swellable single-cell sponge board 1 into desired thicknesses, products with different thicknesses can be easily manufactured.

<Example> To explain an example, as shown in FIG. 1, the water-swellable single-cell sponge plate 1 of the present invention is formed into a large-area flat plate with a super absorbent resin mixed therein. Further, the water-swellable single-cell sponge board 1 of the present invention contains a foaming agent,
It is molded into a flat plate using an expansion molding method that involves foaming and expanding.

<Effects of the Invention> Since the present invention is configured as described above, it is possible to stop water on a positive water surface with a large area and large volume compared to conventional ones, and the water supply at the time of initial compression can be stopped. It has good conformability to parts, requires less load for initial compression, and has much better water-stopping properties than hard rubber.

[Brief explanation of the drawing]

The first is a perspective view showing an embodiment of the present invention, FIGS. 2 and 3 are plan views obtained by punching the same, and FIGS. 4 to 6 are perspective views showing different conventional examples. 1 Sponge board 1a, 1b Water supply material 2, 3.4 Water supply material patent Applicant: Representative of Nishikawa Rubber Industries Co., Ltd.
Person Patent Attorney Furu 1) Tsuyoshi Tsuyoshi Figure 1 1 Sponge Board Figure 2 Figure 3 a Figure 4 Figure 5 Figure 6 Procedures Amendment (Method) December 26, 1991 1. Indication of the case Patent Garden No. 112250 of 1990 2, Name of the invention: Water-expandable single-cell sponge board 3, Relationship to the case of the person making the amendment Patent applicant: Nishikawa Rubber Industry Co., Ltd. 4, Agent: Hatchobori, Naka-ku, Hiroshima, 730 Japan 6 No. 7-701 No. 5, Date of amendment order: November 26, 1991 6, Subject of amendment: Brief explanation of drawings in the specification, column 7, Contents of amendment, page 4, line 12 of the specification

Claims (1)

[Scope of Claims] [1] A water-swellable single-cell sponge board formed by mixing a super absorbent resin and molding it into a large-area flat plate. [2] A water-expandable single-cell sponge board formed into a flat plate by an expansion molding method comprising mixing a foaming agent and expanding the foam.