Water-absorbing tape

Abstract

To provide a preventive measure for accelerating the corrosion of a structure by wetting a floor surface due to water immersion or dew condensation, the water immersion being, as blowing water in torrential rain, typhoon, and the like accompanying an increase in the frequency of occurrence of typhoon / linear precipitation zone due to recent climate change, flowing into the inside of a house, an apartment, a building, or the like through a gap of a structure such as a door or a shutter of the house, the dew condensation easily occurring on the inside of a door or a window glass due to a difference in temperature or humidity between the outdoor and the indoor accompanying an increase in airtightness with the outside air due to the spread of an aluminum sash in the house.SOLUTION: A water-absorbing tape is configured such that a water-absorbing sheet 1, which is obtained by mixing fiberized natural pulp 2, powdery super evaporative divergent water-absorbing resin 3, and heat-adhesive composite fiber 4, is then undergone a heat-molding the mixture to form a sheet, and then covering the resulting sheet with a non-woven fabric encasing material 5 composed of polyethylene / polyester.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] This invention relates to a water-absorbing tape that absorbs condensation on doors, walls, window panes, etc. inside a house, and also absorbs water that seeps into a room through gaps caused by a storm or the like, and more specifically, to an excellent water-absorbing tape that absorbs water and can be used repeatedly by drying. [Background technology]

[0002] In recent years, climate change has led to an increase in the frequency of typhoons and linear rain bands, and furthermore, water that blows in during torrential rains and typhoons can enter houses, apartments, and buildings through gaps in windows, doors, shutters, and other structures, and the widespread use of aluminum sashes in houses has increased airtightness from the outside air, making it easier for condensation to form on the inside of doors and window glass due to the difference in temperature and humidity between indoors and outdoors. This water intrusion and condensation can wet the floor and accelerate corrosion of structures, so the present invention was invented as a preventative measure. However, there exists a dew absorbing tape as a conventional technique that has an evaporation-transmitting layer and a water absorbing layer, and a dew absorbing tape that uses a crosslinked sheet of a resin sheet mainly composed of ethylene oxide as the water absorbing layer (see, for example, Patent Document 1). However, the conventional water-absorbing layer is described as being excellent in thermoplastic formability by addition-polymerizing alkylene oxide with a resin mainly made of ethylene oxide, and reacting it with at least one of a polycarboxylic acid compound and a diisocyanate compound, and is easy to process into sheets, has a freely selectable thickness, and is suitable for mass production, but this is still insufficient. For example, a sheet 50 mm wide x 700 mm long and 2.15 mm thick cannot absorb 550 g of water, and cannot be used repeatedly more than three times after drying. As one solution to such problems, we have developed an absorbent tape in which the fiberized natural pulp of the present invention is mixed with a powdered super-evaporative absorbent resin and a heat-adhesive composite fiber, and the absorbent sheet is heat-molded into a sheet-like shape, and then covered with a nonwoven fabric surrounding material made of polyethylene / polyester. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP-A-7-119364 (see claims, detailed description of the invention, and Figs. 1 to 6) Summary of the Invention [Problem to be solved by the invention]

[0004] Although conventional condensation water absorbing tape technology has a certain effect, it has not been possible to confirm the excellent effect of the present invention. In other words, the present invention was developed in order to obtain a water absorbing tape that is thin, light, and has a smart design, and can not only absorb 550g of water, which is a sufficient amount, but also swells to prevent water from entering through gaps, and has a great effect. The body of the present invention is compressed to about 2 mm to make it thin, yet light, and has a convenient size of 2 mm thick x 50 mm wide x 700 mm long, and can be cut to the appropriate length depending on the object and place of use. The cut surface can be firmly sealed with staples or cellophane tape so that it does not interfere with use. The cut surface is designed to prevent absorbed resin from leaking out. [Means for solving the problem]

[0005] The first invention of the present invention that can achieve the above object is a water-absorbent tape as described in claim 1, which is as follows. The absorbent sheet is made by mixing fiberized natural pulp, powdered super-evaporative absorbent resin, and heat-bondable composite fiber, and then heat-molding it into a sheet-like shape. The absorbent sheet is then covered with a nonwoven fabric surrounding material made of polyethylene / polyester.

[0006] The second invention of the present invention that can achieve the above object is a water-absorbent tape as described in claim 2, which is as follows. In addition to the invention described in claim 1, the structure is 2 mm thick x 50 mm wide x 700 mm long. Effect of the Invention

[0007] The water-absorbent tape according to the present invention has the configuration as described above, and therefore exhibits the effects described below. (1) It has a thin, light and smart design. (2) The main body is 2 mm thick, 50 mm wide, and 700 mm long, and expands as it absorbs water to prevent water from entering through gaps between structures. (3) The product of the present invention that has absorbed water can be used repeatedly by drying it (the results of an experiment confirmed that it absorbed about 550 g of water even after three repeated uses; see Table 1 for the water absorption characteristic curve). (4) It can be cut freely, and the cut ends can be tightly covered with cellophane tape or staples for further use. (5) When in use, the product of the present invention can be attached with spray glue, double-sided adhesive tape, etc. [Table 1] [Brief description of the drawings]

[0008] [Figure 1] 1A and 1B are cross-sectional views showing the basic structure of one embodiment of a water-absorbent tape according to the present invention, where (a) is a schematic perspective view, and (b) is a schematic enlarged cross-sectional view taken along line AA in (a). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] This absorbent tape is made by mixing fiberized natural pulp, powdered super-evaporative water-absorbent resin, and heat-adhesive composite fiber, and then heat-molding the absorbent sheet into a sheet shape, covering it with a nonwoven fabric surrounding material made of polyethylene / polyester. EXAMPLES

[0010] BEST MODE FOR CARRYING OUT THE DISCLOSURE An embodiment of the water-absorbent tape of the present invention will now be described with reference to the drawings. First, as conventional and commonly used water-absorbing tapes, products made of materials such as felt, nonwoven fabric, and silica gel are commercially available. Furthermore, the technology shown in Patent Document 1 as prior art does not have sufficient water supply capacity; at best, it is said that an improvement has been made to the conventional method of increasing water absorption by making the tape as thick as possible, but the problem of the tape being thin and the slow evaporation and dissipation of absorbed water has been corrected, but it is believed that this does not yet result in the water-absorbing tape that is desired. The present invention is a further improvement of this.

[0011] The present invention will now be described in detail with reference to FIG. In the figure, reference numeral 1 denotes an absorbent sheet, which is made by processing natural pulp 2 into fiber (fibrous form), mixing this natural pulp 2 with a super-evaporative, water-absorbent resin 3 made of polyethylene / polypropylene or the like, and heat-adhesive composite fiber 4, and then thermally molding it in an oven to produce an absorbent sheet with a thickness of about 2 mm. This absorbent sheet 1 is covered with a nonwoven fabric surrounding material 5 made of polyethylene / polyester. For the purpose of use, the absorbent sheet 1 adopts a powdered super-evaporative water-absorbent resin that absorbs large amounts of water, and in order to retain this resin within the absorbent sheet 1, it is manufactured by mixing fine heat-adhesive composite fibers that crosslink with fibers of natural pulp 2 manufactured into a cotton-like form, melting them at a relatively low temperature, and heating and pressing them into a sheet shape. The super-evaporative water-absorbing resin 3, fiberized natural pulp 2, and heat-adhesive composite fiber 4 are melted and mixed to form a mat-like mixture, which is then conveyed into an oven while being sucked from below by a conveyor, where it is cross-linked by heat to form the water-absorbing sheet 1. The nonwoven fabric surrounding material 5 made of nonwoven fabric that covers the water-absorbent sheet 1 is generally made of polypropylene nonwoven fabric and is surrounded with high-frequency welded acrylic glue (binder), but acrylic binders require water treatment. The nonwoven fabric of the present invention is hydrophilic, has fast water permeability, and is surrounded by a low-thermal melting polyethylene / polyester composite nonwoven fabric, so water treatment is not required and it is possible to prevent the powder-like fine super-evaporative water-absorbent resin 3 from spilling.

[0012] The shape of the water-absorbent sheet 1 of the present invention is characterized in that damage and disasters such as condensation water on buildings and water seeping in through gaps in blown-in water are all visible to people, and restrictions on shape and size are imposed from the perspective of aesthetics. In particular, to deal with water seeping in through gaps in building structures such as doors and shutters, it is desirable to make the thickness about 2 mm before water absorption and about 30 mm after water absorption. This expansion to about 30 mm after water absorption allows visual confirmation that water has been absorbed. In addition, it is desirable for the width to be 50 mm and the length to be 700 mm, and for the product to be able to be freely cut to fit the location of use in narrow spaces. To briefly explain the water absorption speed, when water comes into contact with one end of the water absorbent tape 1, the water immediately reaches the super-evaporative water absorbent resin 3 held between the fibers due to the capillary action of the fine fibers of the thermally adhesive composite fiber 4 and the fiberized natural pulp 2 cross-linked to the water absorbent sheet, causing the water to swell rapidly. The water absorption speed of the water absorbent tape 1 of the present invention is such that it can absorb nearly 600 g of water in 30 seconds. Furthermore, the amount of water absorbed is very small, so commercially available dew absorbing tapes with non-woven fabric absorbers can absorb up to 15g / cm 2 However, the amount of water blown in during a typhoon is large, so the water level is about 150g / cm 2 It is desirable to do so.

[0013] Next, convenience during use will be described. The product of the present invention can be freely cut by the user and attached to the place of use. It can be cut freely with scissors or the like to fit the installation location, and the cut surface can be sealed with cellophane tape or the like. When attaching, it can be freely attached with spray glue or double-sided adhesive tape. Furthermore, in the case of occasional water leaks or condensation, water absorption and evaporation will occur repeatedly, so it is desirable for the product to be able to be used repeatedly for as long as possible after installation and to evaporate and dissipate quickly when exposed to the outside air. For this purpose, a super-evaporative water-absorbent resin 3 is used. The super-evaporative, dissipative water-absorbent resin 3 is made of a cross-linked super-absorbent resin (cross-linked sodium polyacrylate), the heat-adhesive composite fiber 4 is made of ES fiber made of polyethylene / polypropylene, and the nonwoven fabric surrounding material 5 is made of low-thermal-solubility composite fiber made of polyethylene / polyester. [Industrial Applicability]

[0014] It can be used not only to prevent condensation on window glass, but also in places where water is used and where water is likely to get in, such as the tank part of a flush toilet, and entrance doors to prevent water from being blown in. [Explanation of symbols]

[0015] 1. Water-absorbent sheet 2. Natural pulp 3. Super-evaporative water-absorbent resin 4. Thermo-adhesive composite fiber 5. Nonwoven fabric enclosure

Claims

1. This water-absorbent tape is characterized in that it is made by mixing fiberized natural pulp, powdered super-evaporative water-absorbent resin, and heat-adhesive composite fiber, and then heat-molding the mixture into a sheet-like water-absorbent sheet, which is then covered with a nonwoven fabric surrounding material made of polyethylene / polyester.

2. 2. The water-absorbent tape according to claim 1, characterized in that it has a thickness of 2 mm, a width of 50 mm and a length of 700 mm.

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