JP2011177934A - Absorbing plate for dew condensation water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbing plate for dew condensation water which can suppress a deterioration in beauty in duration of service. <P>SOLUTION: The absorbing plate for dew condensation water which has a laminated structure, a design layer for giving designability to the surface, an foam layer with continuous open cell pores for making dew condensation water be absorbed, and a foam layer with closed cell pores laminated on the back side of the foam layer with continuous open cell pores and in which in order to make the dew condensation water be absorbed from an end face, the bubbles of the foam layer with continuous open cell pores are opened in the end face is provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a condensed water absorbing plate for absorbing condensed water, and more particularly to a condensed water absorbing plate having an open-celled foam layer for absorbing condensed water.

Conventionally, condensed water that has condensed on a window glass or the like is absorbed by a condensed water absorbent tape attached to the lower side of the window glass to prevent the wall or floor under the window from getting wet with the condensed water. It has been broken.
As this condensed water absorbing tape, a water absorbing base material such as felt provided with an adhesive layer is known, but this kind of condensed water absorbing tape is not sufficient to evaporate condensed water. It may cause mold and the like, which may impair the aesthetics of the room.

Incidentally, in recent years, the use of an open-cell foamed sheet as a water-absorbing sheet has been studied.
The open-celled foam sheet is usually formed of a polyolefin-based resin or a polystyrene-based resin, and a bubble film made of the resin is formed on the surface thereof. It has been studied to make a hole by making a needle punch or the like in the membrane and to draw water into the inside of the open-celled foam sheet from the hole by using a capillary phenomenon (Patent Document 1 below).

JP 2006-265296 A

Since the open-cell foamed sheet has a cell membrane on the surface as described above, it is easy to keep the surface dry, and the possibility of generating mold on the surface can be reduced compared to the case where felt or the like is used. .
Moreover, since mold spores floating in the air can be suppressed by the bubble film, it is possible to suppress the possibility that the aesthetic appearance is impaired.
However, the open-cell foamed sheet is less likely to evaporate the water once taken in compared with felt or the like, and moreover, when dust or the like is accompanied by the dew condensation water, there is a possibility that it will accumulate inside.
In such a case, the darkening inside may be visible from the outside through the bubble film, resulting in a loss of aesthetics.
That is, it is difficult to sufficiently suppress the loss of aesthetics during the period of use by simply using the open-celled foam sheet for the condensed water absorbing plate.

  This invention is made | formed in view of the above problems, and makes the subject the provision of the dew condensation water absorption board which can suppress the fall of the aesthetics during a use period.

  The present invention relating to a condensed water absorbing plate for solving the above-mentioned problems has a laminated structure, is provided with a design layer for imparting design properties to the surface, and is open-celled for absorbing condensed water. A foamed layer and a closed-celled foam layer laminated on the back side of the open-celled foam layer, and in order to absorb the condensed water from the end surface, the cells of the open-celled foam layer are It is characterized by opening at the end face.

The surface temperature of window glass and doors where condensation occurs is usually lower than the temperature of the exposed room, and if condensed water absorbing plates are placed in such locations, the absorbed condensed water is cooled by these. As a result, the situation becomes more difficult to evaporate.
As a result, moisture tends to remain, and mold or the like may be generated.
On the other hand, the dew condensation water absorbing plate of the present invention further includes a closed cell foam layer on the back side of the open cell foam layer that absorbs dew condensation water.
Therefore, even if it attaches to a window glass or a door, a possibility that internal dew condensation water may be cooled by these can be suppressed.
That is, the evaporation of condensed water is promoted and it becomes easy to dry, so that the generation of mold and the like can be suppressed, and the possibility that the aesthetic appearance is deteriorated can be suppressed.

In addition, in a simple open-celled foam sheet, when darkening due to mold or dust occurs inside, these are easily visible from the outside, but according to the condensed water absorbing plate of the present invention, the design on the surface Since it has a layer, even if blackening is generated in the open-celled foam layer, it can be prevented from being visually recognized from the outside.
That is, the condensed water absorbing plate of the present invention can suppress a decrease in aesthetic appearance during the period of use.

The front view which shows the condensed water absorption board of one Embodiment. FIG. 2 is a cross-sectional view taken along line X-X ′ in FIG. 1. Schematic which shows one use aspect of a dew condensation water absorption board.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing a condensed water absorbing plate according to the present embodiment, and FIG. 2 is a view (sectional view taken along line XX ′) showing a sectional structure thereof.
Moreover, FIG. 3 is the schematic which showed a mode that the condensed water absorption board 1 of this embodiment was attached to the window glass W, and the condensed water D which flows down through this window glass is absorbed.

As shown also in this figure, the dew condensation water absorbing plate 1 of the present embodiment is formed in the shape of a horizontally long plate, and the contour BL on the lower side in FIG. SL2 has a linear shape, whereas the upper outline UL has a wave shape that swings up and down.
That is, the upper edge portion is formed in a corrugated shape when attached to a vertical surface.
Although the size of the condensed water absorbing plate 1 is not particularly limited, the length (L) is usually 30 cm as long as it is attached to a general household window. ˜1 m50 cm, height (H: height to wave-shaped top portion UL1) is 5 cm to 20 cm, and thickness is 1 mm to 5 mm.
In addition, the distance (waveform amplitude) from the top UL1 to the bottom UL2 of the upper contour line UL is normally set to 1 cm to 3 cm.

The condensed water absorbing plate 1 of the present embodiment has a laminated structure, and a design layer 10 is provided on the most surface side of the laminated structure.
The dew condensation water absorbing plate 1 of the present embodiment includes an open cell foam layer 20 that contacts the design layer 10 on the back side, a closed cell foam layer 30 that contacts the open cell foam layer 20 on the back side, and the independent layer. A reinforcing film layer 40 is provided in contact with the cellular foam layer 30 on the back side.
Furthermore, the condensed water absorbing plate 1 of the present embodiment is provided with an adhesive layer 50 on the back side of the reinforcing film layer 40 for attaching to an adherend such as a window glass.
In addition, in FIG. 2, the cross-sectional structure of the dew condensation water absorption board 1 of the state before use is shown, and the state in which separator SP was stuck on the surface of the said adhesion layer 50 is shown.

The said design layer 10 is comprised by the clear film 10a located in the outermost surface side of the condensed water absorption board 1, and the printing film 10b which contact | connects this clear film 10a on the back side.
That is, the design layer 10 is configured so that the design imparted to the printing film 10b can appear on the surface through the transparent clear film 10a.
The clear film 10a is preferably a polyester film such as a polyethylene terephthalate (PET) film from the viewpoint of transparency, wear resistance, strength, and the like.
As this polyester film, a film having a thickness of 10 μm to 50 μm can be usually employed.

Since the printed film 10b is in contact with the open cell foam layer 20, the print film 10b is preferably formed of a material having a high affinity for the material for forming the open cell foam layer 20. More preferably, it is made of the same material as the forming material.
For example, when the open-celled foam layer 20 is formed using a polystyrene-based resin, the printing film 10b is also preferably a polystyrene-based resin film, for example, 10 μm to 10 μm to which surface printing is performed. A polystyrene resin film having a thickness of 50 μm can be adopted as the printing film 10b.

Although not described in detail here, the design property does not need to be imparted by printing as illustrated above. For example, a plurality of shades of resin pellets are extruded without being uniformly mixed and themselves have a marble pattern. The design layer 10 can be formed by adopting a film having the printed film 10b instead of the printed film 10b.
Furthermore, the clear film 10a is not essential for the design layer.
For example, the design layer can be constituted only by a film imparted with designability by a surface shape such as an embossed film.

The open-celled foam layer 20 can be made of a polystyrene-based resin or a polyolefin-based resin, and is preferably formed of a polystyrene-based resin in terms of easy adjustment of the foamed state.
In that case, the closed cell foam layer 30 and the open cell foam layer 20 are both made of polystyrene resin foam sheets, and these are coextruded and directly laminated. Bonding strength can be imparted between them.
Further, by adopting this co-extrusion method, an open cell foam sheet for forming the open cell foam layer 20 and a closed cell foam sheet for forming the closed cell foam layer 30 can be simply used. It can be produced and is also suitable from the viewpoint of manufacturing efficiency of the condensed water absorbing plate 1.

As a material for forming such a foamed sheet, a polystyrene resin composition having the polystyrene resin as a base polymer is suitable.
As the polystyrene-based resin as the base polymer, a copolymer of styrene and another monomer, a rubber-modified polystyrene, a styrene-based elastomer, or the like can be used in addition to a styrene homopolymer.
These polystyrene resins may be used alone or in combination of two or more to form the base polymer.

  Examples of the other monomer for copolymerization with styrene include α-methylstyrene, methacrylic acid, acrylic acid ester, methacrylic acid ester, acrylonitrile, and maleic anhydride.

The rubber-modified polystyrene has a structure in which rubber is dispersed in the form of particles in a polystyrene matrix, and polystyrene is further dispersed in the rubber particles.
As the rubber-modified polystyrene, those in which the rubber particles are dispersed in various forms such as a salami shape and a core-shell shape can be adopted, and the rubber particles may be contained alone or in combination of two or more.
In addition, in order to ensure the weather resistance of the dew condensation water absorption board 1, this rubber modified polystyrene is desirably used in combination with a polystyrene resin other than the rubber modified polystyrene and other synthetic resins.

Examples of the styrene-based elastomer include a copolymer of styrene and a conjugated diene and a hydrogenated product of a copolymer of styrene and a conjugated diene.
Examples of the conjugated diene include conjugated dienes having 4 to 10 carbon atoms such as butadiene, isoprene, and 2-ethylbutadiene.
In consideration of deterioration of the polymer itself, a hydrogenated product of a copolymer of styrene and conjugated diene is preferable because deterioration hardly occurs.

As a hydrogenated product of a copolymer of styrene and conjugated diene, a hydrogenated product of a block of styrene and conjugated diene or a random copolymer is preferable.
Examples of the conjugated diene include conjugated dienes having 4 to 10 carbon atoms such as butadiene, isoprene and 2-ethylbutadiene.
Preferred hydrogenated styrene-conjugated diene copolymers include hydrogenated styrene-isoprene block copolymers, hydrogenated styrene-butadiene block copolymers, and hydrogenated styrene-butadiene random copolymers. It is.
The fully saturated structure of these copolymers includes, for example, styrene-ethylene-butylene copolymer, styrene-ethylene-butylene-styrene block copolymer, styrene-ethylene-propylene copolymer, styrene-ethylene-propylene-styrene block. Such as a copolymer.
These copolymers can be contained alone or in combination of two or more in the polystyrene resin composition.

Furthermore, the polystyrene-based resin composition used for forming the open cell foam layer 20 and the closed cell foam layer 30 can contain a foaming agent. Examples of the foaming agent include known chemical foaming agents, physical Any blowing agent can be used.
Examples of chemical foaming agents include decomposition types such as azodicarbonamide and reaction types such as sodium bicarbonate-citric acid.
Examples of the physical blowing agent include hydrocarbons such as propane, butane and pentane, inert gases such as nitrogen and carbon dioxide, ethers such as dimethyl ether and diethyl ether, halogenated hydrocarbons such as tetrafluoroethane, chlorodifluoroethane and difluoroethane. Etc.
These foaming agents may be used alone or in combination of two or more.
Butane mainly composed of isobutane having few environmental problems and a large effect of maintaining secondary foamability during thermoforming is particularly preferable.

Furthermore, the polystyrene-based resin composition may contain a cell regulator, and examples of the cell regulator include inorganic fillers such as talc, mica, mica and montmorillonite, organic fine particles such as fluororesin, or azodicarboxylic acid. Decomposable chemical foaming agents such as amides, reactive chemical foaming agents such as sodium bicarbonate-citric acid, and inert gases such as nitrogen and carbon dioxide can be used.
These bubble regulators may be used alone or in combination of two or more.
The addition amount of the bubble regulator is 0.1 to 5 parts by weight with respect to 100 parts by weight of the total resin component.

  In addition, other known additives such as a colorant, a stabilizer, a filler, a lubricant, an additive, and a dispersant can be appropriately added to the polystyrene resin composition.

The open cell foam layer 20 formed of such a material preferably has an open cell ratio of 60% to 90%, more preferably 60% to 80%.
In addition, the open cell foam layer 20, from the viewpoint of water absorbing performance, it is preferable that a density of ^{0.04g / cm 3 ~0.10g / cm 3} , the thickness, in 1.0mm~3.0mm Preferably there is.
In addition, the said open cell ratio can be measured based on ASTM D2856-87, and the said density can be calculated | required based on JISK7222: 2005 "How to obtain | require foamed plastics and rubber-apparent density".

Moreover, as the said closed-cell foaming layer 30, it is preferable that the open cell ratio is formed in 30% or less using the polystyrene-type resin composition illustrated above.
Further, from the viewpoint of heat insulation and the like, the density is preferably 0.05 g / cm ^{3 to} 0.2 g / cm ³ and the thickness is preferably 0.5 mm to 2.0 mm.

  Although not described in detail here, the coextruded sheet of the open cell foam sheet and the closed cell foam sheet constituting the open cell foam layer 20 and the closed cell foam layer 30 is a general coextrusion sheet. The cylindrical coextruded sheet can be produced by extruding into a cylindrical shape with a circular die and then cooling while being stretched in the circumferential direction by a cooling mandrel.

Moreover, when the said adhesion layer 50 is directly laminated | stacked on the said closed cell foam layer 30, the said reinforcement film layer 40 is a bubble of the said closed cell foam layer 30 when peeling the dew condensation water absorption board 1 from a to-be-adhered body. Since the film may cause cohesive failure and the adhesive layer 50 may partially remain on the adherend side, it is provided to prevent this.
Therefore, those showing good adhesion to the closed cell foam layer 30 and the adhesive layer 50 are suitable, for example, a PET film, a polystyrene resin film, or a laminated film obtained by laminating these is suitable. It is.

  The pressure-sensitive adhesive layer 50 can be formed of a common material such as an acrylic pressure sensitive adhesive, a rubber pressure sensitive adhesive, or a silicon pressure sensitive adhesive.

In addition, general lamination | stacking means, such as heat lamination, can be employ | adopted for lamination | stacking other than the said open cell foam layer 20 and the said closed cell foam layer 30. FIG.
The dew condensation water absorbing plate 1 of the present embodiment has not only the laminated structure as described above, but also the design layer 10 so that the dew condensation water absorbed by the open cell foam layer 20 can be evaporated from the surface. A plurality of cuts CL, CL ′ penetrating to reach the open-celled foam layer 20 are provided.

This notch CL is provided to guide the condensed water absorbed by the open-celled foam layer 20 to the surface of the design layer 10 through the notches CL and CL ′ and evaporate from the surface.
Therefore, it is preferable that the notches CL and CL ′ reach deeper into the open cell foam layer 20, and it is preferable to reach the center in the thickness direction of the open cell foam layer 20.
Further, if necessary, it is possible to provide a notch having a depth that reaches the closed cell foam layer 30 beyond the open cell foam layer 20.

In the present embodiment, the condensed water absorbing plate 1 is provided with two types of cuts, a cut CL extending in the lateral direction and a cut CL ′ provided in a cross shape.
The condensed water absorbing plate 1 of the present embodiment includes a utilization method that is pasted below the window glass W as shown in FIG. 3 as a typical utilization method.
At that time, the dew condensation water is mainly absorbed from the upper end face of the dew condensation water absorbing plate 1, and the absorbed dew condensation water gradually moves downward.
Therefore, by providing the incision CL extending in the lateral direction, the incision CL exists in a form that intersects with the moving direction of the dew condensation water. It is possible to prevent the dew condensation water from moving to the lower end side of the absorption plate 1.

In addition, the cut CL extending in the lateral direction is cut into a wave shape that swings up and down in the same manner as the upper contour line UL of the condensed water absorbing plate 1.
In order to evaporate the condensed water, it is effective to increase the length of the cut CL. Therefore, like the condensed water absorbing plate 1 of the present embodiment, the cut CL is wave-shaped to provide a linear cut. More condensed water can be evaporated as compared with the case.

  In addition, since the dew condensation water absorption board 1 of this embodiment is formed so that it may become a waveform with the upper outline UL swinging up and down as mentioned above, as shown in FIG. When pasted and used, the dew condensation water is stored in the bottom portion UL2, and more dew condensation water is absorbed by the open cell foam layer 20.

This will be described in more detail. In general, condensation starts from adhering to the surface of a low-temperature object such as a window glass in the size of a mist.
At this time, the size of the condensed droplet is small, and the droplet does not flow down because the adhesion force that the droplet adheres to the glass surface is superior to the gravity acting on the droplet.
Thereafter, when the moisture in the air is taken in and the droplet grows further, the droplet flows down.
At this time, the liquid droplets that started to flow first take in the condensed water adhering to the glass surface in the middle of the flow and grow the size rapidly.
Accordingly, the speed at which the droplets of condensed water flow down rapidly increases.

Here, the condensed water absorbing plate 1 of the present embodiment has a corrugated upper edge, so that the impact of the dropped liquid droplets colliding with the end surface of the condensed water absorbing plate 1 is alleviated.
That is, if the upper edge is horizontal, the collision direction of the liquid droplet is perpendicular to the end surface, and therefore, a part of the liquid droplet may get over the end surface and overflow to the surface side by the collision energy of the liquid droplet. However, in the condensed water absorbing plate 1 of the present embodiment, since the droplet collides with the upper end surface at an angle, the droplet is commutated along the end surface that is inclined with respect to the traveling direction, and the impact is reduced. .
As a result, it is possible to suppress the overflow of condensed water on the surface side.

In addition, since the flow of such droplets usually occurs at a certain time interval, during this time, the dew condensation water stored in the corrugated bottom UL2 is sufficiently filled with the open cell foam layer. 20 will be absorbed.
Since the buffering action and the absorption action in the collision with the flowing condensed water are exhibited by making the end face into a corrugated shape, the action layer itself and the closed cell foam layer 30 are in the action itself. Although there is no relation, it is an excellent effect in relation to the notch CL and the closed cell foam layer 30 provided so as to penetrate the design layer 10 in the overall function such as absorption and evaporation of condensed water as follows. It is demonstrated.

That is, in the dew condensation water absorbing plate 1 of the present embodiment, both the wave-shaped cut CL and the cross-shaped cut CL ′ are provided so as to make the surface of the design layer 10 recessed.
Therefore, even if condensed water that has flowed down overflows on the surface side, when flowing down along the surface of the design layer 10, the recessed portion acts as a passage resistance and acts to prevent the flow down.
In addition, since the cuts CL and CL ′ are provided at the recessed portions, the dew condensation water absorbing plate 1 is guided through the cuts CL and CL ′.

For this reason, the dew condensation water is prevented from moving to the lower side of the window glass W through the dew condensation water absorption plate 1, and the wall or floor under the window is prevented from being wetted by the dew condensation water. become.
Further, the absorbed condensed water is thermally blocked from the adherend because the closed-cell foam layer 30 is interposed between the open-cell foam layer 20 and the adherend (window glass W). It will be heated to room temperature relatively early and will evaporate from the surface.

By promoting the recovery from the wet state in this manner, it is possible to prevent the dew condensation water absorbing plate 1 and the surroundings from generating mold.
Moreover, since the condensed water absorbing plate 1 of the present embodiment is provided with the design layer 10 on the surface, even if accumulation of dust or the like occurs inside, dirt is hardly noticeable in appearance, and the aesthetic appearance Can suppress the risk of damage.

  In addition, in this embodiment, although the above illustrations are performed about the structure and forming material of a dew condensation water absorption board, and a manufacturing method, this invention is not limited to the said illustration.

DESCRIPTION OF SYMBOLS 1 Condensation water absorption board 10 Design layer 20 Open-cell foaming layer 30 Close-cell foaming layer 40 Reinforcing film layer 50 Adhesion layer CL Cutting

Claims (10)

  It has a laminated structure and is provided with a design layer for imparting design properties to the surface, and is laminated on the back side of the open cell foam layer for absorbing condensed water and the open cell foam layer A condensate water absorbing plate, further comprising a closed cell foam layer, wherein the bubbles of the open cell foam layer are opened at the end face so as to absorb the dew condensation water from the end face.   A plurality of notches that penetrate through the design layer and reach the open-celled foam layer are provided so that condensed water absorbed from the end face into the open-celled foam layer can be evaporated from the surface. The condensed water absorption board of claim | item 1.   The condensed water absorbing plate according to claim 1, wherein the condensed water absorbing plate has a long plate shape, and the plurality of cuts extend in a longitudinal direction.   The condensed water absorbing plate according to claim 3, wherein the plurality of cuts have a corrugated shape.   The condensed water absorbing plate according to claim 3 or 4, wherein a surface of the design layer is recessed along the cut.   The condensed water absorbing plate according to any one of claims 3 to 5, wherein at least one of the side edges in the longitudinal direction of the long plate has a corrugated shape.   The adhesive layer for adhering to a to-be-adhered body on the backmost side, and having at least one resin film layer between the adhesive layer and the closed cell foam layer. The condensed water absorption board of any one of Claims.   The condensed water absorbing plate according to any one of claims 1 to 7, wherein the open-cell foamed layer and the closed-cell foam layer are directly laminated by coextrusion.   The condensed water absorbing plate according to claim 8, wherein both the open-celled foam layer and the closed-cell foamed layer are formed of a polystyrene-based resin.   The condensed water absorbing plate according to any one of claims 1 to 9, wherein the design layer is configured by a clear film disposed on an outermost surface side and a printing film in contact with the clear film on a back surface side.

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