Liquid storage container and small-hole elastomer sheet

Abstract

To provide a liquid storage container and a small-hole elastomer sheet which enable liquid stored therein to be discharged by a simple operation and have excellent handleability of the discharged liquid.SOLUTION: A liquid storage container 1 has a storage section 24 capable of storing liquid f therein and is equipped with a discharge section E that discharges the liquid f to the outside. The discharge section E is formed from a small-hole elastomer sheet, and a plurality of small holes P in the sheet can be opened and closed by expanding and contracting. The liquid storage container 1 has a liquid supply surface C located at a position separated from the discharge section E. The liquid storage container 1 is configured such that the discharge section E is pressed against the liquid supply surface C by pressing the discharge section E, whereby the liquid f is discharged through the small holes P, and by releasing the pressing force, the discharge section E is separated from the liquid supply surface C, and the discharged liquid f is held on the discharge section E.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a liquid storage container and a small-hole elastomer sheet capable of discharging stored liquid. [Background technology]

[0002] 2. Description of the Related Art There is known an article that contains a liquid therein and that expels or volatilizes the liquid or a component contained in the liquid to the outside via a sheet provided in the article. For example, Patent Document 1 discloses a stretch active article used to apply liquid to a body part. The stretch active article described in Patent Document 1 contains liquid between an upper layer and a lower layer joined to each other, and the upper layer has elasticity, and by stretching the upper layer in one direction, the thinned portion of the upper layer is torn to form a flow path hole. Furthermore, Patent Document 2 discloses an aroma-generating container that includes a container body containing an aromatic liquid and a porous, breathable film disposed at the opening of the container body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2007 / 0049894 [Patent Document 2] Patent No. 7153301 Summary of the Invention [Problem to be solved by the invention]

[0004] The stretch active article disclosed in Patent Document 1 can be pressed against a portion of the elastic sheet in which slits are formed, causing the sheet to stretch and the slits to open, allowing liquid held inside to be discharged to the outside. The stretch active article disclosed in Patent Document 1 leaves room for improvement in terms of convenience in handling the liquid discharged to the outside of the article by such a pressing operation. Moreover, the aroma-generating container in Patent Document 2 is not intended to be used to discharge liquid contained inside the container body to the outside of the container by pressing.

[0005] The present invention relates to a liquid storage container that allows liquid contained therein to be discharged by a simple operation and that provides excellent handleability of the discharged liquid. [Means for solving the problem]

[0006] The present invention relates to a liquid storage container. In one embodiment, the liquid container preferably has a container portion capable of containing liquid therein and equipped with a discharge portion for discharging the liquid to the outside. In one embodiment, the exhaust portion is preferably formed from a perforated elastomeric sheet. In one embodiment, the small-pore elastomer sheet preferably has a plurality of small holes, and the small holes can be opened and closed by stretching. In one embodiment, the liquid storage container has a liquid supply surface located at a position inside the storage section spaced apart from the discharge section, and it is preferable that the liquid supply surface is the liquid surface of the liquid or the surface of an impregnated body impregnated with the liquid. In one embodiment, it is preferable that the liquid storage container is configured such that pressure from the discharge portion presses the discharge portion against the liquid supply surface, thereby discharging the liquid through the small hole, and that by releasing the pressure, the discharge portion moves away from the liquid supply surface and the discharged liquid is retained on the discharge portion.

[0007] The present invention also relates to a perforated elastomeric sheet having a plurality of perforations. In one embodiment, the small-pore elastomer sheet preferably has a thickness of 10 μm or more and 400 μm or less. In one embodiment, the small-pore elastomer sheet preferably has a durometer of A1 to A60. In one embodiment, the small holes of the small-pore elastomer sheet are preferably capable of opening and closing the small holes by stretching. In one embodiment, with respect to the small-pore elastomer sheet, it is preferable that, while the four sides of a sheet cut into a square of 80 mm square is held, the center of the sheet is pressed to displace the sheet by 20 mm in the normal direction, and then the amount of recovery displacement when the pressure is released is 50% or more and 100% or less of the 20 mm. Effect of the Invention

[0008] According to the liquid storage container of the present invention, the liquid stored therein can be discharged by a simple operation, and the discharged liquid is easy to handle. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing one embodiment of a liquid storage container according to the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 3A is a plan view showing the small-pore elastomer sheet shown in FIG. 1, and FIG. 3B is an enlarged perspective view and an enlarged cross-sectional view showing a schematic state in which small holes in the sheet are closed. [Figure 4] FIG. 4A is a plan view showing a porous elastomer sheet with open pores, and FIG. 4B is an enlarged perspective view and an enlarged cross-sectional view showing the open pores in the sheet. [Diagram 5] 5A and 5B are a cross-sectional view and an enlarged cross-sectional view showing a state in which the discharge portion of the liquid storage container shown in FIG. 1 is pressed. [Figure 6] 6(a) and (b) are enlarged cross-sectional views showing a state in which the pressure on the discharge portion of the liquid storage container shown in FIG. 1 has been released. [Figure 7]7(a) and (b) are views corresponding to FIG. 2, showing another embodiment of a liquid storage container according to the present invention. [Figure 8] FIG. 8(a) is a perspective view and (b) is a cross-sectional view showing still another embodiment of a liquid storage container according to the present invention. [Figure 9] 9(a) and (b) are cross-sectional views showing still another embodiment of a liquid storage container according to the present invention. [Figure 10] 10(a) and (b) are cross-sectional views showing still another embodiment of a liquid storage container according to the present invention. [Figure 11] FIG. 11 is a partial cross-sectional view showing still another embodiment of a liquid storage container according to the present invention. [Figure 12] 12(a) and (b) are cross-sectional views showing a method of using the liquid storage container shown in FIG. [Figure 13] FIG. 13 is an enlarged cross-sectional view of the sheet contact portion shown in FIG. [Figure 14] FIG. 14 is a view corresponding to FIG. 13 and showing another embodiment of the sheet contact portion. [Figure 15] FIG. 15 is a cross-sectional view showing one embodiment of a method for producing a small-pore elastomer sheet according to the present invention. [Figure 16] FIG. 16 is a plan view of the original sheet after being introduced between the pair of rolls shown in FIG. [Figure 17] FIG. 17 is a cross-sectional view showing another embodiment of the method for producing a small-pore elastomer sheet according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the present invention will be described based on preferred embodiments with reference to the drawings. Figures 1 and 2 show one embodiment of a liquid storage container of the present invention. For convenience of explanation, small holes P, which will be described later, are omitted in Figures 1 and 2. A liquid storage container 1 (hereinafter also simply referred to as "container 1") of this embodiment includes a box-shaped container body 20 having a bottom surface portion 23 and an opening 21 facing the bottom surface portion 23. The container body 20 has the bottom surface portion 23 and a rectangular tubular peripheral wall portion 27 standing up from the periphery of the bottom surface portion 23. In the container body 20, one opening of the peripheral wall portion 27 is closed by the bottom surface portion 23, and the other opening of the peripheral wall portion 27 is in an open state, and the other opening serves as the opening 21 of the container body 20. The peripheral wall portion 27 has a rectangular cylindrical shape with a square horizontal cross section, and is formed by plate-like members surrounding the four sides. The plate-like members are rectangular in shape and size. In the container body 20 of this embodiment, the upper end of the peripheral wall portion 27 forms the peripheral edge (opening edge) of the opening 21.

[0011] In this specification, "upper", "upper side" or "upper side" refers to the direction toward the upper side (upper side) in the vertical direction when the bottom surface part 23 of the container body 20 is placed on a horizontal surface, and "lower", "lower side" or "lower side" refers to the direction toward the lower side (lower side) in the vertical direction when the bottom surface part 23 is placed on a horizontal surface. In this state, the height direction Z of the container 1 coincides with the vertical direction (see FIG. 1). The description of the container 1 in this specification is for the above-mentioned state, unless otherwise specified.

[0012] From the viewpoint of further suppressing unintended leakage of the liquid f, it is preferable that the material forming the container body 20 has rigidity. For example, the material of the container body 20 may be an inorganic material such as metal or glass, or a synthetic resin, which can provide the container body 20 with rigidity.

[0013] The container 1 has a storage section 24 capable of storing a liquid f therein (see FIG. 2). In the liquid storage container 1 of the present embodiment, the interior thereof, i.e., the space defined by the bottom surface section 23 and the peripheral wall section 27, serves as the storage section 24, and the storage section 24 is continuous with the opening 21 in the height direction Z. The storage section 24 includes a discharge section E that discharges the liquid f to the outside. This discharge section E is formed from a small-pore elastomer sheet 3 described later. The discharge section E is located on the same plane (at the same height position) as the opening 21 of the container body 20 or below the opening 21. In the latter case, the discharge section E separates the storage section 24 into the opening 21 side and the bottom surface section 23 side, sandwiching the discharge section E. The discharge section E closes the opening on the upper end side (opening 21 side) of the storage section 24. That is, in the storage section 24 of this embodiment, the discharge section E (small-pore elastomer sheet 3) closes the space formed by the bottom surface section 23 and the peripheral wall section 27. In this storage section 24, the liquid f is stored in the space defined by the bottom surface section 23, the peripheral wall section 27, and the discharge section E (see FIG. 2).

[0014] The container 1 has a liquid supply surface C located at a position separated from the discharge part E inside the storage part 24 (see FIG. 2). The liquid supply surface C is the liquid surface of the liquid f or the surface of an impregnated body impregnated with the liquid f.

[0015] The small-pore elastomer sheet 3 is a stretchable sheet having a plurality of small holes P. Figures 3(a) and (b) show the small holes P in the small-pore elastomer sheet 3 in a closed state, and Figures 4(a) and (b) show the small holes P in the small-pore elastomer sheet 3 in an open state. "Elasticity" refers to the property of being stretched by being pulled in a certain direction and contracting by releasing the tension. The closer the length after contraction is to the length before elongation, the higher the elasticity. Moreover, "having elasticity" means that the residual strain (%) measured by the method for measuring residual strain described below is less than 150%.

[0016] [Method of measuring residual strain] A piece of 25 mm×70 mm is cut out from the small hole elastomer sheet 3, and this is used as a sample piece. Next, the sample piece is attached to the chuck of a tensile tester (for example, Shimadzu Corporation's "AUTOGRAPH AG-X" model). When the shape of the small hole P is long in one direction, the sample is attached between the chucks so that the direction perpendicular to the longitudinal direction of the small hole P is the tensile direction. Also, the sample piece is attached between the chucks so that the longitudinal direction of the sample piece coincides with the tensile direction. The distance between the chucks is 50 mm. This distance between the chucks is the natural length a before elongation. Next, the sample piece between the chucks is elongated at a speed of 50 mm / min until the distance between the chucks becomes 55 mm, and then returned at a speed of 50 mm / min until the tensile strength becomes 0 N. The distance b between the chucks when the tensile strength is returned to 0 N is measured, and the ratio (%) of the distance b to the natural length a (50 mm) is measured. The measurement is repeated three times, and the average value is used as the residual strain (%). The larger the residual strain (%), the smaller the shrinkage force, and vice versa.

[0017] The small holes P in the small-pore elastomer sheet 3 are through-holes penetrating the sheet 3. In the liquid storage container 1, the small holes P can be opened and closed by the expansion and contraction of the small-pore elastomer sheet 3. This configuration will be described in detail below. In the porous elastomer sheet 3, when no tensile stress is applied to the sheet (natural state), the openings of the small pores P are closed (closed state) (see Figs. 3(a) and (b)). This is because in the porous elastomer sheet 3 in its natural state, the portions (peripheral edges) that form the peripheries of the small pores P are in close contact with each other. The natural state is the state before the porous elastomer sheet 3 is stretched, and is a state in which no external force is applied to the sheet 3. On the other hand, when the porous elastomer sheet 3 is stretched in the stretching direction, the openings of the small pores P are open (open state) (see Figs. 4(a) and (b)). This is because the porous elastomer sheet 3 is deformed by stretching, and the adhesion between the parts (peripheral edges) that form the peripheries of the small pores P in the sheet 3 is released, causing these parts to move apart. The greater the degree of stretching of the porous elastomer sheet 3, the larger the openings of the small pores P. When the stretched state of the porous elastomer sheet 3 is released, the openings of the small pores P return to a closed state.

[0018] 5 and 6 show a method of using the container 1 of this embodiment. The container 1 can discharge the liquid f from the discharge part E by pressing the discharge part E against the liquid supply surface C by pressing the discharge part E. More specifically, by pressing the discharge part E downward with a user's finger or the like (see FIG. 5(a)), the small-pore elastomer sheet 3 is stretched and the small holes P are opened. In parallel with this, the small-pore elastomer sheet 3 is pressed against the liquid supply surface C, so that the liquid f is discharged through the open small holes P (see FIG. 5(b)). That is, the liquid f moves onto the discharge part E through the small holes P. In this way, the container 1 of this embodiment can discharge the liquid f from the discharge part E by the simple operation of pressing the discharge part E.

[0019] The container 1 is configured such that, after the discharge portion E is pressed, the liquid f discharged through the small holes P is retained on the discharge portion E by releasing the pressure. More specifically, by removing a finger or the like from the discharge portion E to release the pressure on the discharge portion E (see FIG. 6(a)), the small-pore elastomer sheet 3 contracts and the discharge portion E moves away from the liquid supply surface C. As a result, the liquid f1 on the discharge portion E moves away from the liquid f2 located below across the discharge portion E, and is less likely to be drawn toward the liquid supply surface C. Also, the storage space of the liquid f2 separated by the discharge part E in the storage part 24 (the space on the liquid supply surface C side) becomes a negative pressure k2 due to the contraction of the small hole elastomer sheet 3. Further, the discharge part E (the small hole elastomer sheet 3) after the pressing is released is in a state of being deflected more than the state before pressing due to the self-weight of the liquid f1 on the discharge part E. As a result, at least a part of the small holes P in the discharge part E is in a state where the opening is not completely closed. In the container 1 of the present embodiment, at a part of the small holes P that are not completely closed, the surface tension j of the liquid f1 on the discharge part E acts on the liquid supply surface C side of the small hole P (see Fig. 6(b)). By the balance between this surface tension j and the total of the load k1 due to the self-weight of the liquid f1 on the discharge part E and the negative pressure k2 of the storage space of the liquid f2 in the storage part 24 (j≒k1 + k2), the liquid f1 can be held on the discharge part E. That is, the liquid f1 can be made to stay on the discharge part E.

[0020] When the surface tension j is smaller than the total of the load k1 due to the self-weight of the liquid f1 on the discharge part E and the negative pressure k2 of the storage space of the liquid f2 in the storage part 24 (j < k1 + k2), the liquid f1 on the discharge part E is drawn into the liquid supply surface C side through a part of the small holes P that are not completely closed. As a result, the amount of the liquid f1 on the discharge part E decreases, and the load k1 thereof decreases, thereby achieving the above-described balanced state.

[0021] As described above, the container 1 of the present embodiment can hold the liquid f1 discharged through the small holes P on the discharge part E. That is, the liquid f does not flow out other than on the discharge part E, and the state of staying on the discharge part E is maintained. Thereby, the liquid f1 on the discharge part E can be attached to or applied to a separate object, facilitating the handling of the liquid f1 after discharge. For example, when the liquid f is a cleaning detergent, the liquid f1 on the discharge part E can be wiped off with a sheet, and the sheet can be used as a cleaning sheet. Also, when the liquid f is a fragrance containing an aromatic compound, by volatilizing the liquid f1 on the discharge part E, the container 1 can be used as an aromatic generating container. Thus, the container 1 of the present embodiment is excellent in the handleability of the discharged liquid f1.

[0022] From the viewpoint of more stably holding the liquid f1 on the discharge portion E, it is preferable that the height H2 from the liquid supply surface C to the discharge portion E in the height direction Z of the container 1 be within the following range. The height H2 (see Figure 2) from the liquid supply surface C to the discharge section E in the height direction Z of the container 1 is preferably 10% or more and 80% or less, and more preferably 30% or more and 70% or less, of the height H1 (hereinafter also referred to as "height H1 of the storage section 24"; see Figure 2) from the bottom (bottom surface portion 23) of the storage section 24 to the discharge section E in the height direction Z. From the viewpoint of more stably holding the liquid f1 on the discharge portion E while taking into consideration the deflection of the small-pore elastomer sheet 3, the height H1 of the storage portion 24 (see FIG. 2) is set to the cube of the cross length L (see FIG. 2) of the small-pore elastomer sheet 3 in a plan view (L 3 ), that is, the cube of the length L of the small-hole elastomer sheet 3 between the peripheral wall portions 27 (L 3 ) to divide the height H1 above (H1 / L 3 ) is 0.2 × 10 ―4 mm -2 Above 2.0×10 ―4 mm -2 It is preferable that the value is less than 0.35×10 -4 mm -2 Above 1.0×10 -4 mm -2 It is more preferable that the horizontal length L is equal to or less than the hydraulic diameter described below, and the above H1 / L 3 The value of may be calculated.

[0023] The shape of the discharge part E (small-pore elastomer sheet 3) when the container 1 is viewed in a plan view is not particularly limited, and can be any shape, such as a circle, an equilateral triangle, a rectangle such as a square, a hexagon, or a polygon. Therefore, when the shape of the discharge part E is a circle, the across length L is the diameter of the opening 21. When the shape of the discharge part E is a rectangle, the across length L is the length of one side of the opening 21. In addition, when the shape of the discharge part E is an equilateral triangle, a hexagon, a polygon, or the like, the across length L can be a hydraulic diameter. The hydraulic diameter is a value obtained by dividing four times the horizontal cross-sectional area of ​​the opening 21 by the perimeter of the opening 21.

[0024] The height H2 (see FIG. 2) from the liquid supply surface C to the discharge part E in the height direction Z of the container 1 is preferably 15 mm or more and 50 mm or less, more preferably 10 mm or more and 35 mm or less, and further preferably 8 mm or more and 20 mm or less. The heights H1 and H2 are the heights of the container 1 before use.

[0025] From the viewpoint of more stably holding the liquid f1 on the discharge part E, it is preferable that the container 1 of this embodiment has the following configuration. When the center of the discharge part E is pushed 5 mm toward the liquid supply surface C from its natural position, the maximum reaction force of the discharge part E is preferably less than 10 N, more preferably 0.01 N to 2 N, and even more preferably 0.1 N to 1 N. Such a reaction force can be measured with a force gauge (e.g., ZTS-50N, manufactured by Imada Co., Ltd.). More specifically, the maximum reaction force is the measured value of the maximum load when the center of the discharge part E is pushed 5 mm toward the liquid supply surface C with a flat attachment (e.g., attachment A-2 of ZTS-50N, manufactured by Imada Co., Ltd.) in a plan view.

[0026] In the container 1 of this embodiment, when the height H1 from the bottom (bottom surface 23) of the storage section 24 to the discharge section E before the discharge section E is pushed toward the liquid supply surface C is taken as 100%, the height H1' (not shown) from the bottom (bottom surface 23) of the storage section 24 to the discharge section E when the pressure on the discharge section E is released is preferably 70% or more, preferably 75% or more and 99% or less, and more preferably 80% or more and 95% or less. The height H1' is the restored height of the discharge portion E (the small-pore elastomer sheet 3) 5 seconds after the central part of the discharge portion E in a plan view is pressed and the pressed part is extended until it reaches the bottom of the storage portion 24, and then the pressing is released. The height H1' is the height in a state where no liquid f1 is present on the discharge portion E. The height H1 or the height H1' is measured after an opening is provided in a part of the peripheral wall 27 of the container body 20, and the liquid f or the impregnated body impregnated with the liquid f is removed from the opening.

[0027] From the viewpoint of further suppressing leakage of the liquid f and further achieving a balance between the dischargeability of the liquid f and the retention on the discharge part E, the durometer hardness of the small-pore elastomer sheet 3 is preferably A1 to A60, more preferably A20 to A55, and even more preferably A30 to A50. By setting the durometer hardness within this range, the flexibility of the small-pore elastomer sheet 3 can be further improved, and the dischargeability of the liquid f and the retention on the discharge part E can be further improved. More specifically, the negative pressure k2 in the storage space of the liquid f can be suppressed, and the above-mentioned balanced state (j ≒ k1 + k2) can be more easily satisfied. This allows the liquid f1 to be more stably retained (retained) on the discharge part E.

[0028] [Method of measuring hardness] The durometer is measured by the following method based on JIS K6253-3 (2012 edition). The durometer is used to measure the durometer. First, a piece measuring 50 mm x 50 mm is cut out from the small-pore elastomer sheet 3, and this is used as a sample. The durometer and automatic constant pressure loader are then used to measure the durometer. The durometer is type A or type D. Measurements are performed at five different points on the sample, and the median of these measured values ​​is used as the durometer. The measurement points (measurement locations) are at positions 12 mm or more away from the periphery of the sample, and the distance between the measurement points is 6 mm or more. If the sheet thickness of the sample is less than 6 mm, multiple samples are stacked to obtain a thickness of 6 mm or more. The measurement is performed in an environment where the temperature is 23 ± 2°C and the humidity is 50 ± 5%.

[0029] In order to further suppress leakage of the liquid f and to achieve a balance between the dischargeability of the liquid f and its retention on the discharge portion E, the thickness of the small-pore elastomer sheet 3 is preferably 10 μm or more and 500 μm or less, more preferably 100 μm or more and 400 μm or less, and even more preferably 200 μm or more and 400 μm or less. When the thickness of the small-pore elastomer sheet 3 is within the above-mentioned range, the flexibility is maintained and the liquid f1 on the discharge part E can be held more stably.

[0030] [Method of measuring thickness] The thickness of the small-pore elastomer sheet 3 can be measured based on Method A of JIS K6250-3 (2019 edition). Specifically, a cylindrical measuring terminal (indenter) with a diameter of 5 mm is used to measure the thickness while applying a pressure of 22±5 kPa (44 gf) to the portion of the sample other than the small holes P. This measurement is performed at three different measurement points, and the average value of these values ​​is taken as the thickness of the small-pore elastomer sheet 3.

[0031] From the viewpoint of further improving the retention of the liquid f1 on the discharge part E, the small-pore elastomer sheet 3 has a tensile strength at 110% elongation of preferably 3 N / 25 mm or more and 40 N / 25 mm or less, more preferably 5 N / 25 mm or more and 25 N / 25 mm or less. Such tensile strength is measured by the following method.

[0032] [Method for measuring tensile strength at 110% elongation] The tensile strength of the porous elastomer sheet 3 at 110% elongation is measured by the following method. First, a sample piece cut out from the porous elastomer sheet 3 is attached to the chucks of a tensile tester by the same method as in the above [Method of Measuring Residual Strain]. The distance between the chucks (natural length a) is 50 mm. Next, the tensile strength is measured when the sample between the chucks is stretched to 110% elongation (until the distance between the chucks becomes 55 mm) at a speed of 500 mm / min. This measurement is repeated three times, and the average value is taken as the tensile strength at 110% elongation.

[0033] The shape of the small holes P in the small-hole elastomer sheet 3 is not particularly limited, and may be a circular hole such as a circle or an ellipse, or may be a slit extending in one direction. Such a shape is the shape of the small holes P when they are open.

[0034] From the viewpoint of achieving a better balance between the effect of preventing leakage and the ability to drain the liquid f, the small hole P preferably has a length of 2.0 mm or less when open. From the viewpoint of achieving a better balance between the ability to drain and the ability to retain the liquid f, the small hole P preferably has a length of 0.3 mm or more and 2.0 mm or less when open, more preferably 0.5 mm or more and 1.5 mm or less, and even more preferably 0.8 mm or more and 1.0 mm or less. The length of the small hole P when opened is the maximum diameter length of the small hole P when the small hole elastomer sheet 3 is stretched by 10% in a direction perpendicular to the longitudinal direction of the opening of the small hole P, i.e., when the length is 110% of the length before stretching. The length of the small holes P when opened can be adjusted by the size of the punching convex portion used when forming the small holes P. Specifically, the length of the small holes P when opened can be adjusted by the size of the punching pin or blade used when forming the small holes P. The small-pore elastomer sheet 3 may have small holes P of the same size, or may have small holes P of different sizes. In this case, it is preferable that the length of some of the small holes P when opened in the small-pore elastomer sheet 3 is within the above-mentioned range, and it is more preferable that the length of all of the small holes P when opened is within the above-mentioned range.

[0035] The liquid storage container 1 of this embodiment has a plurality of small hole rows P1 in which a plurality of small holes P are arranged in one direction in the small hole elastomer sheet 3 (see Fig. 3(a) and Fig. 4(a)). The extension direction Y of the small hole row P1 coincides with the longitudinal direction of the small holes P. The direction X perpendicular to the extension direction Y of the small hole row P1 is also simply referred to as the "orthogonal direction X". The small hole rows P1 are arranged in a plurality of rows along the orthogonal direction X, and the positions of the small holes P between adjacent small hole rows P1 are shifted by half a pitch in the extension direction Y. That is, in the small hole elastomer sheet 3 of this embodiment, a plurality of small holes P are arranged in a staggered pattern. With this configuration, the intervals between the small holes P can be made wider, so that the liquid f can be discharged over a wider range and the liquid f can be more stably held on the discharge part E. The small holes P may be arranged in a staggered manner. Alternatively, the positions of the small holes P in the extending direction Y between adjacent small hole rows P1 may coincide with each other.

[0036] From the viewpoint of achieving both the effect of preventing leakage of the liquid f from the discharge portion E and the dischargeability, the small-pore elastomer sheet 3 has preferably 1 small hole P per unit area at 110% elongation of 1 hole / cm 2 More than 60 pieces / cm 2 Less than 6 / cm, more preferably 2 More than 20 pieces / cm 2 The following is the result.

[0037] [Method of measuring the number of small holes P per unit area] A sample piece of 50 mm square is cut out from the perforated elastomer sheet 3. When the sheet from which the sample piece is cut has both an area where a plurality of small holes P are formed and an area where no small holes P are formed, the sample piece is cut out from the area where a plurality of small holes P are formed. Next, the square sample piece is stretched by 110% in a direction along one of the opposing sides. That is, the sample piece is stretched so that the length after stretching is 110% (55 mm) of the length before stretching. When the shape of the small holes P is elongated in one direction, the sample piece is stretched so that the direction perpendicular to the longitudinal direction of the small holes P becomes the tensile direction. Then, the number of small holes P in the sample piece is counted, and the unit area (100 mm square of 10 mm square) is calculated from the number of small holes P and the area of ​​the sample piece when stretched by 110%. 2 Such a measurement is carried out at any three points of the small hole elastomer sheet 3, and the average value thereof is regarded as the number of small holes P per unit area.

[0038] In order to achieve a better balance between the effect of preventing leakage of the liquid f and the ability to discharge it, the distance D1 (see Figure 3) between the small holes P in the small hole elastomer sheet 3 when stretched by 110% is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 50 mm or less, more preferably 10 mm or less, and also preferably 0.5 mm or more and 50 mm or less, more preferably 1.0 mm or more and 10 mm or less.

[0039] [Method of measuring the distance between small holes] The distance between the small holes P in the small hole elastomer sheet 3 at 110% elongation is measured by the following method. First, a sample piece is elongated by 110% by the same method as in the above [Method for measuring the number of small holes P per unit area]. Next, the distance between the centroids of adjacent small holes P in the sample piece is measured at three points, and the average of these distances is taken as the distance between the small holes P in the small hole elastomer sheet 3 at 110% elongation. Here, the "distance between the small holes P" refers to the distance between the small holes P in the tensile direction of the small hole elastomer sheet 3 (sample piece) when the small holes P are not elongated in one direction. When the small holes P are elongated in one direction, the distance refers to the distance between the small holes P located in the direction perpendicular to the longitudinal direction of the small holes P.

[0040] Films made of various elastic resins can be used as the material for forming the small-pore elastomer sheet 3. It is preferable to use a thermoplastic elastomer as the elastic resin, since it is easy to achieve the desired elasticity and the elastomer sheet can be bonded to the container body 20 by heat. Examples of the thermoplastic elastomer include styrene-based elastomers, ester-based elastomers, urethane-based elastomers, olefin-based elastomers, and amide-based elastomers. Examples of styrene-based elastomers include SBS (styrene-butadiene-styrene), SIS (styrene-isoprene-styrene), SEBS (styrene-ethylene-butadiene-styrene), and SEPS (styrene-ethylene-propylene-styrene). Examples of the ester-based elastomer include those in which the hard segment is polyester and the soft segment is polyester, polyether, or poly(ether-ester). Examples of urethane-based elastomers include those in which the hard segment is an aromatic polyurethane or an aliphatic polyurethane, and the soft segment is a polyester, a polyether, a poly(ether-ester), a polycarbonate, or a polycaprolactone. Examples of olefin-based elastomers include copolymers of polyolefins such as polyethylene and polypropylene with ethylene-propylene rubber (EPM) and ethylene-propylene-diene rubber (EPDM). From the viewpoint of chemical resistance, polypropylene elastomers are preferred. Examples of the amide-based elastomer include copolymers of a polyamide structure and a polyether structure. The elastic resin may be, for example, silicon rubber (SiQ) or fluororubber (F). By using these elastic resins, a small-pore elastomer sheet having excellent chemical resistance can be obtained.

[0041] The small-pore elastomer sheet 3 may be composed of a single elastic resin film layer, or may be composed of multiple elastic resin film layers. In the latter case, the small-pore elastomer sheet 3 may have a laminated structure in which multiple elastic resin film layers made of the same type of elastic resin are laminated, or may have a laminated structure in which multiple elastic resin film layers made of different types of elastic resin are laminated. The small-pore elastomer sheet 3 may have portions having different hardnesses and thicknesses on the same plane.

[0042] The porous elastomer sheet 3 may have self-adhesiveness. Self-adhesiveness is a property of only adhering to the same kind of material and not substantially adhering to other materials. The porous elastomer sheet 3 can have self-adhesiveness by being provided with an elastic resin film layer having self-adhesiveness. That is, the porous elastomer sheet 3 in this form is configured by including an elastic resin film layer having both self-adhesiveness and stretchability. Examples of the constituent resin of the elastic resin film layer having both self-adhesiveness and stretchability include acrylic polymer resins such as methyl acrylate and ethyl acrylate. If the porous elastomer sheet 3 has self-adhesiveness, it is effective in that the closed state of the small holes P can be better maintained when the sheet is unused.

[0043] The porous elastomer sheet 3 may have a self-repairing property. Self-repairing property is a property of restoring damage caused by an impact or the like. The porous elastomer sheet 3 can have a self-repairing property by being provided with an elastic resin film layer having a self-repairing property. That is, the porous elastomer sheet 3 in this form is configured by including an elastic resin film layer having both self-repairing property and stretchability. The elastic resin film layer having both self-repairing property and stretchability is configured by, for example, a crosslinked polyurethane elastomer or the like. If the porous elastomer sheet 3 has a self-repairing property, it is effective in better maintaining the closed state of the small holes P when they are not in use.

[0044] From the viewpoint of more actively volatilizing the liquid f, the oxygen permeability coefficient of the small-pore elastomer sheet 3 is preferably 1.0×10 -15 (mol m / m 2 The oxygen permeability coefficient can be measured by a method according to JIS K7126 using OX-TRAN2 / 21ML manufactured by MOCON.

[0045] In the liquid storage container 1 of this embodiment, a small-pore elastomer sheet 3 is fixed to the upper end of the peripheral wall portion 27, on the inner surface of the peripheral wall portion 27 (see FIG. 2). The small-pore elastomer sheet 3 closes the opening in the storage portion 24. The small-pored elastomer sheet 3 may be fixed by being sandwiched between the constituent members that make up the container body 20, or may be fixed to the container body 20 by known joining means such as heat fusion or adhesives.

[0046] In this embodiment, the small-pore elastomer sheet 3 is fixed to the peripheral wall 27 in a state in which the small holes P are not opened. The small-pore elastomer sheet 3 is fixed to the peripheral wall 27 of the container body 20 with an elongation of preferably 90% or more and less than 110%, more preferably 100%. An elongation of 100% means that no elongation force is applied to the small-pore elastomer sheet 3 and the small-pore elastomer sheet 3 is in a flat state. An elongation of less than 100% means that the small-pore elastomer sheet 3 is bent and the central part of the small-pore elastomer sheet 3 is recessed toward the liquid supply surface C. In this case, the span length of the small-pore elastomer sheet 3 at an elongation of 100% is longer than the span length between the peripheral walls 27. By fixing the small-pore elastomer sheet 3 to the container body 20 with an elongation of 100% or more and less than 110%, the small pores P open more easily when pressed, thereby improving the dischargeability of the liquid f. The elongation is the ratio (%) of the length after elongation to the length before elongation (length in the natural state).

[0047] The container body 20 of this embodiment is a hollow hexahedron made of a plate-like member. As described above, the material of the container body 20 can be inorganic materials such as metal and glass, synthetic resin, etc. In this case, the container body 20 can be manufactured by injection molding or press blow molding using a mold. Examples of inorganic materials include glass, ceramics such as porcelain, and metals. Examples of the synthetic resin include polyethylene terephthalate, polypropylene, polyethylene such as high density polyethylene, vinyl chloride, etc. Examples of the glass include soda glass, borosilicate glass, silica glass, quartz glass, etc.

[0048] The liquid f contained in the container 1, more specifically, in the container portion 24, is not particularly limited and may be any liquid depending on the purpose of use of the container 1. Examples of the liquid f include disinfectant alcohol such as ethanol, liquid cosmetics such as lotion, milky lotion, beauty essence, and liquid foundation, liquid cleaning agents such as face wash, hand soap, and body soap, liquid hair care agents such as shampoo, conditioner, and hair styling agent, cleaning detergents for floors and toilets, impregnating liquids for floor wipers, laundry detergents, fabric softeners, dyes or pigments such as paints, and fragrances (fragrant liquids) containing aromatic compounds.

[0049] The container 1 of the embodiment can be used for applications according to the type of the liquid f described above. For example, the container 1 can be used to add a disinfectant or cleaning detergent to a sheet. The sheet can be used as a wet sheet to which a disinfectant has been added, or a floor wiper used to wipe a floor. In this case, the liquid f discharged from the container 1 is attached to or impregnated into a fiber sheet such as a nonwoven fabric or paper on the discharge section E, and then the fiber sheet is brought into contact with the application target, etc., to indirectly apply the liquid f to the application target. The container 1 can also be used as a container for storing cosmetics such as lotion, milky lotion, beauty essence, foundation, etc. In this case, the container 1 can be used in a state where a liquid f such as lotion is held on the discharge part E.

[0050] The viscosity of the liquid f contained in the liquid storage container 1 is not particularly limited, and may be a low-viscosity liquid or a high-viscosity liquid. When the liquid f is a low-viscosity liquid, the viscosity of the liquid f is preferably 0.005 Pa·s or less, and more preferably 0.0001 Pa·s or more and less than 0.002 Pa·s. When the liquid f is a high-viscosity liquid, the viscosity of the liquid f is preferably 20 Pa·s or less, and more preferably 17 Pa·s. The viscosity of liquid f can be measured at 20° C. using a digital viscometer (viscometer TVB-10M (manufactured by Toki Sangyo Co., Ltd.), rotor No. 3, rotation speed: 30 rpm). The liquid f may be in a sol state or a gel state.

[0051] The surface tension of the liquid f contained in the liquid storage container 1 is not particularly limited. From the viewpoint of more reliably ensuring the retention of the liquid f on the discharge portion E, the surface tension of the liquid f is preferably 20 mN / m or more, more preferably 21 mN / m or more. There is no particular upper limit to the surface tension of the liquid f. When the viscosity of the liquid f is 1 Pa s or more, the surface tension of the liquid f is 75 mN / m or less from a practical viewpoint. The surface tension of the liquid f can be measured using the Wilhelmy method based on JIS K 2241 (2017). The hardness and thickness of the small-pore elastomer sheet 3 can be selected according to the surface tension of the liquid f measured in this manner.

[0052] The liquid f may be volatile. In this case, the liquid f has a volatilization rate of preferably 3 g / day or more, more preferably 5 g / day or more and 50 g / day or less, and more preferably 10 g / day or more and 30 g / day or less. With this configuration, when the liquid f is an aromatic containing an aromatic compound, the aromatic compound can be effectively volatilized. The volatilization rate is measured by the following method.

[0053] <Method of measuring evaporation rate> 50 g of liquid f is weighed into a 50 cc glass beaker with a diameter of 43 mm, and left to stand for 3 days in an environment with a room temperature of 24±2°C and a humidity of 50%±4%, during which the amount of the liquid lost per day is measured every 12 hours and converted into the amount of the liquid lost per day. The average amount of the liquid f lost per day is then calculated and this is taken as the volatilization rate (g / day).

[0054] The components contained in the liquid f are not particularly limited. The liquid f may contain various components such as an organic solvent, an aqueous solvent including water, a thickener, a surfactant, a fragrance, a disinfectant, a virus disinfectant, an antibacterial agent, and an antifungal agent. Table 1 below shows an example of the composition of the liquid f.

[0055] [Table 1]

[0056] Next, another embodiment of the liquid storage container of the present invention will be described. In the following description, components different from the embodiment shown in Figures 1 to 6 will be mainly described, and similar components will be given the same reference numerals and description will be omitted. For components not specifically described in the following description, the description of the above embodiment or other embodiments will be applied as appropriate.

[0057] FIG. 7 shows a cross-sectional view of a liquid storage container having a configuration different from the above-described embodiment. 7(a) has a top surface portion 26 that protrudes from the upper end of a peripheral wall portion 27 toward the center of a container body 20 in a plan view, and an opening 21 is formed in the top surface portion 26. A discharge portion E is fixed to the inner surface side of the top surface portion 26. The container 1a of this embodiment has a hexahedral shape by including the top surface portion 26.

[0058] In the container 1a of this embodiment, the storage section 24a has a bottom a1 that tapers away from the top surface 26 in a cross-sectional view. In the container body 20 of this embodiment, the plate-like member forming the bottom surface 23a has a tapered recessed portion whose cross-sectional area decreases from the inner surface side to the outer surface side. Due to such a recessed portion, the bottom a1 of the storage section 24a has a tapered shape. As a result, even if only a small amount of liquid f remains in the storage section 24a, the liquid f is collected in the center of the bottom a1, making it easier to discharge the liquid f by the pressed discharge section E.

[0059] A liquid storage container 1b shown in Fig. 7(b) has an impregnated body 7 of liquid f in the storage section 24. In this embodiment, the surface of the impregnated body 7 serves as a liquid supply surface C. The container 1b of this embodiment can collect the liquid f in the impregnated body 7 by absorption by the impregnated body 7 when the remaining amount of liquid f in the storage section 24 becomes low. As the impregnated body 7, any material capable of being impregnated with the liquid f can be used without any particular limitation. For example, a laminate of hydrophilic fibers such as cellulose, a fiber sheet such as a nonwoven fabric, a porous body such as a sponge, etc. can be used. Examples of the porous body include foams, and specific examples thereof include polyurethane, wet urethane, acrylonitrile-butadiene copolymer (NBR), styrene-butadiene copolymer (SBR), natural rubber (NR), ethylene-propylene-diene copolymer (EPDM), melamine foam, polyvinyl alcohol (PVA), foams containing cellulose or the like as a raw material, etc.

[0060] A liquid storage container 1c (container 1c) shown in Figs. 8(a) and (b) has a container body 20 having a hollow hexahedron, and has an opening 21 on each surface of the hexahedron except for a bottom surface 23. More specifically, the openings 21 are provided on each of the four plate-like members constituting the peripheral wall portion 27 and the plate-like member constituting the top surface portion 26. Furthermore, a discharge portion E (small-pore elastomer sheet 3) is fixed to the inner surface of each plate-like member. A liquid f can be discharged from each surface of the peripheral wall portion 27 or the surface of the top surface portion 26. The liquid storage container 1c shown in Fig. 8 has an impregnated body 7 impregnated with a liquid. In the container body 20 of the present embodiment, the openings 21 in the peripheral wall portion 27 and the top surface portion 26 have the same shape, but the shapes of the openings 21 may be different. In addition, the container body 20 may be provided with a plate-shaped member that does not have an opening 21.

[0061] A liquid storage container 1d (container 1d) shown in Figures 9(a) and (b) has another sheet on the liquid supply surface C side of the discharge portion E. More specifically, a virgin sheet 29 indicating that the container 1d is unused is disposed between the discharge portion E and the liquid supply surface C. The virgin sheet 29 is disposed in the space defined by the discharge portion E, the peripheral wall portion 27, and the bottom surface portion 23, and separates the discharge portion E from the liquid supply surface C. The virgin sheet 29 is fixed to each inner surface of the peripheral wall portion 27 by a joining means such as an adhesive. When the container 1d of this embodiment is used for the first time, the virgin sheet 29 is broken by pressing the discharge part E, and the discharge part E can come into contact with the liquid supply surface C. From the viewpoint of further preventing the inner surface of the small-pore elastomer sheet 3 from getting wet with the liquid f volatilized in the storage portion 24, the virgin sheet 29 is preferably disposed between the discharge portion E and the liquid supply surface C.

[0062] In the liquid storage container 1f shown in FIG. 10, the storage section 24 is divided into a plurality of spaces by the virgin sheet 29. More specifically, the storage section 24 is divided into two spaces by the virgin sheet 29. The plurality of spaces include a space on the discharge section E side of the virgin sheet 29 and a space on the opposite side of the discharge section E of the virgin sheet 29, and different contents f3, f4 are stored in each of these spaces (see FIGS. 10(a) and 10(b)). When the container 1f of this embodiment is used for the first time, the virgin sheet 29 is broken by pressing the discharge section E, and the different contents f3, f4 separated by the virgin sheet 29 are mixed together to become a mixed liquid. The liquid level of such a mixed liquid becomes the liquid supply surface C, and the mixed liquid is discharged and held on the discharge section E by pressing the discharge section E. The combination of different contents f3 and f4 in this embodiment may be a combination that causes a chemical reaction such as synthesis, decomposition, heat generation, endothermic heat generation, foaming, defoaming, discoloration, or light emission when these contents f3 and f4 are mixed. Both contents f3 and f4 may be liquid, or one of them may be liquid and the other may be solid. These forms are effective especially when the storage stability of the mixed liquid is low. The liquid may be in a gel or sol form. The container 1f shown in Figure 10 divides the storage area 24 into two spaces by a single virgin sheet 29, but it may also divide the storage area 24 into three or more spaces by two or more virgin sheets 29.

[0063] The virgin sheet 29 may be a sheet of paper, aluminum foil, synthetic resin, glass, or the like. In particular, by using a sheet having gas barrier properties such as aluminum foil as the virgin sheet 29, volatilization and leakage of the liquid f during distribution of the container 1 can be further prevented.

[0064] Furthermore, the virgin sheet 29 may be provided with a fracture starting point. The fracture starting point is formed by placing a member such as a ball or a block on the upper surface of the virgin sheet 29. By having the fracture starting point, the virgin sheet 29 can be fractured more easily. The component of the fracture starting point is preferably about 3 mm in diameter. Furthermore, the component of the fracture starting point does not have to be fixed to the virgin sheet 29. The fracture origin may be a weak portion such as a through hole, a slit, or a half cut formed in the virgin sheet 29.

[0065] A liquid storage container 1e (container 1e) shown in Figures 11 and 12 includes a container body 4 having a hollow cylindrical shape. The container body 4 includes an upper cylinder portion 40 having an upper opening 41, a central cylinder portion 46, and a main body cylinder portion 50 (see Figure 11). In the height direction Z of the container 1e, a bottom surface portion 53 of the main body cylinder portion 50 is in contact with a horizontal plane, the central cylinder portion 46 is stacked on the main body cylinder portion 50, and the upper cylinder portion 40 is further stacked on the central cylinder portion 46, and these cylinder portions 40, 46, 50 are arranged. The upper cylinder portion 40 is a cylindrical body having a top surface portion 40a, an upper opening 41 formed in the top surface portion 40a, and an upper peripheral wall portion 40b hanging down from the peripheral edge of the top surface portion 40a. The upper peripheral wall portion 40b has an inner surface formed with a recess into which an upper engagement portion 47 of the central peripheral wall portion 46b, which will be described later, engages.

[0066] The central tubular portion 46 is a cylindrical body, and is formed by a cylindrical peripheral wall portion 46b (hereinafter, also referred to as the "central peripheral wall portion 46b"). The central peripheral wall portion 46b has an upper engagement portion 47 formed on the outer surface of the upper end portion that engages with the inner surface of the upper peripheral wall portion 40b, and a lower engagement portion 48 formed on the inner surface of the lower end portion that engages with the outer surface of the upper end portion of the main body cylindrical portion 50. These engagement portions 47, 48 have convex portions formed on the outer ends in the height direction Z, and concave portions formed inward in the height direction Z from the convex portions (see FIG. 11). The upper engagement portion 47 engages with the concave portions formed on the inner surface of the upper peripheral wall portion 40b, and the lower engagement portion 48 engages with the concave portions formed on the outer surface of the upper end portion of the main body cylindrical portion 50. The central tubular portion 46 has a central protruding portion 45 protruding toward the center of the central tubular portion 46 in a plan view at the upper end of the lower engagement portion 48 of the peripheral wall portion 46b. The central cylinder portion 46 also has therein a biasing means 49. The biasing means 49 in this embodiment is made of a spring member and can be compressed or restored along the height direction Z. The biasing means 49 is disposed in a cylindrical shape along the inner surface of the central peripheral wall portion 46b.

[0067] The tubular main body 50 has a bottom surface 53, a peripheral wall 50b rising from the peripheral edge of the bottom surface 53, and a protruding portion 56 protruding from the upper end of the peripheral wall 50b toward the center of the tubular main body 50 in a plan view. An opening 51 is formed in the protruding portion 56. The tubular main body 50 has a space defined by the bottom surface 53 and the peripheral wall 50b inside. This space serves as a storage portion 54 (see FIG. 11). That is, a liquid f is stored inside the tubular main body 50.

[0068] The container 1e of this embodiment has a pressing means 42 housed inside the central tube portion 46. The pressing means 42 has a plate-shaped pressing operation portion 44 and a columnar sheet contact portion 43 protruding downward from the center of the pressing operation portion 44. The pressing operation portion 44 is disposed between the biasing means 49 and the top surface portion 40a of the upper tube portion 40, and is exposed from the upper opening 41 (opening) of the upper tube portion 40. The pressing operation portion 44 and the sheet contact portion 43 are continuous. The sum of the thickness of the pressing means 42 and the height of the sheet contact portion 43 in the height direction Z is approximately equal to the height from the lower surface of the top surface portion 40a of the upper tube portion 40 to the discharge portion E. The sheet contact portion 43 has an approximately cylindrical shape with a rounded tip protruding downward. In the container 1e of this embodiment, a small-pore elastomer sheet 3 is sandwiched and fixed between the central protrusion 45 of the central tubular portion 46 and the protrusion 56 of the main tubular portion 50, and the sheet 3 forms the discharge portion E.

[0069] 12(a) and (b) show a method of using the container 1e of this embodiment. The container 1e of this embodiment discharges the liquid f from the discharge portion E by pressing the discharge portion E via the pressing means 42. More specifically, by pressing the pressing operation portion 44 from the upper opening 41, the pressing means 42 is pressed downward and the biasing means 49 is compressed downward. In conjunction with this pressing operation portion 44, the sheet contact portion 43 presses the discharge portion E (see FIG. 12(b)). Thereafter, the liquid f is held on the discharge portion E in the same manner as in the above-described embodiment. Furthermore, when the pressing means 42 is pressed and then released, the biasing means 49 returns to its original state. It is preferable that the biasing means 49 is in a compressed state before pressing (see FIG. 12(a)). In this state, the pressing operation part 44 is kept pressed against the top surface part 40a, so that the liquid f held on the discharge part E can be prevented from leaking out of the container 1e.

[0070] In a cross-sectional view along the height direction Z of the container 1e of this embodiment, the sheet contact portion 43 is formed with an intrusion path 43c extending horizontally and a volatilization through path 43d extending in the height direction Z. The volatilization through path 43d extends downward through the center of the pressing operation portion 44, and the lower end of the volatilization through path 43d communicates with the intrusion path 43c (see Figures 12(a) and (b)). The intrusion path 43c penetrates the sheet contact portion 43 in the horizontal direction. In the container 1e of this embodiment, when the liquid f held on the discharge portion E volatilizes after pressing, gas can be efficiently released to the outside of the container through the intrusion passage 43c and the volatilization through passage 43d, and even if the container 1e is turned on its side or upside down, the pressing means 42 can prevent the liquid f from leaking out of the container 1e. Moreover, it is preferable that the opening end 43c1 of the intrusion path 43c protrudes outward beyond the outer circumferential surface of the sheet contact portion 43 (see FIG. 13). This can further prevent the liquid f from leaking out of the container 1e. In the container 1e of this embodiment, there may be a plurality of intrusion paths 43c. In addition, although one volatilization through path 43d is provided, there may be a plurality of volatilization through paths 43d, or a plurality of volatilization through paths 43d may branch off from the intrusion path 43c. The intrusion path 43c may be inclined with respect to the horizontal direction.

[0071] The intrusion path 43c may be designed to be located below the liquid level of the liquid f when the pressing means 42 is pressed. In such a sheet contact portion 43, when the sheet contact portion 43 presses the discharge portion E, the liquid f that has moved onto the discharge portion E intrudes into the intrusion path 43c. Then, after the pressing of the sheet contact portion 43 (pressing means 42) is released, the sheet contact portion 43 is pulled up into the central tube portion 46 by the biasing means 49. The liquid f that has intruded into the intrusion path 43c is evaporated to the outside of the pressing means 42 and the container 1e through the evaporation through path 43d. In such a form, a liquid pool portion 43e for holding the liquid f that has intruded into the intrusion path 43c may be formed at the intersection of the evaporation through path 43d and the intrusion path 43c (see FIG. 14). The liquid pool 43e is a portion having an inner diameter larger than the volatilization through passage 43d and the intrusion passage 43c, and forms a spherical space in this embodiment. The sheet contact portion 43 shown in Fig. 14 is effective when the container 1e is used as an aroma generating container.

[0072] Next, a method for producing the small-pore elastomer sheet 3 provided in the liquid storage container of the present invention will be described based on a preferred embodiment thereof. In the manufacturing method of this embodiment, an original sheet 3' of the small-pore elastomer sheet 3 is prepared. This original sheet 3' is stretched and cut (see FIG. 15). Small holes P are formed in the cutting process to manufacture the small-pore elastomer sheet 3. In the cutting process, the original sheet 3' is stretched at the time of cutting, so that small holes P that can be opened and closed by expansion and contraction can be formed. The raw sheet 3' is an elastic elastomer sheet, and it is preferable to use one having the above-mentioned durometer hardness and thickness.

[0073] When perforated, the original sheet 3' is preferably elongated to an elongation of more than 100% and not more than 200%, more preferably 101% or more and not more than 130%, and even more preferably 110%. By elongating the original sheet 3' within this range, the small holes P can be well maintained in a closed state, and unintended leakage of liquid f can be suppressed. The elongation is the ratio (%) of the length after elongation to the length before elongation. The above-mentioned "before elongation" refers to the state in which the original sheet 3' is flattened without applying a stretching force. The raw sheet 3' may be cut in two or more stages. In this case, the raw sheet 3' may be cut in a state in which it is stretched to a given degree of elongation, and then cut in a state in which it is stretched to a different degree of elongation.

[0074] In this embodiment, the raw sheet 3' is introduced between a pair of rolls including a cutter roll 60 and an anvil roll 63, and a predetermined region of the raw sheet 3' is cut (see FIG. 15). As a result, the raw sheet 3' has a region where a plurality of small holes P are formed (hereinafter also referred to as a "small hole region") and a region where no small holes P are formed (hereinafter also referred to as a "non-small hole region"). The small hole region of the raw sheet 3' becomes the small hole elastomer sheet 3. The cutter roll 60 has a blade 61 on its circumferential surface. The blade 61 has a shape corresponding to the outline of the small hole P when opened. In this embodiment, the original sheet 3' is stretched in the machine direction (MD direction) to form the small hole P. In this case, from the viewpoint of further improving the blocking property of the small hole P and further improving the liquid retention of the small hole elastomer sheet 3, it is preferable that the blade 61 of the cutter roll 60 has a shape long in the direction perpendicular to the machine direction (CD direction). In other words, it is preferable that the longitudinal direction of the blade 61 of the cutter roll is perpendicular to the stretching direction of the original sheet 3'. For example, it is preferable that the blade 61 of the cutter roll 60 has a shape long in the axial direction of the cutter roll that coincides with the CD direction. In order to improve the cutting performance, the cutter roll 60 may be installed so that the tip edge of the blade 61 is inclined by about 1 to 30 degrees with respect to the CD direction. In this case, the angle θ of the small hole P (slit) formed by the blade 61 with respect to the CD direction is in the above-mentioned range (see FIG. 16). The above-mentioned cutting process may be performed by introducing the original sheet 3' between a cutting tool having a plurality of blades 61 protruding from a substrate and a receiving tool that receives the blades 61, and raising and lowering the cutting tool relative to the original sheet 3'.

[0075] In order to further improve the liquid retention of the small-pore elastomer sheet 3, the length of the blade 61 used in the cutting process is preferably 0.1 mm or more and 2.0 mm or less, more preferably 0.5 mm or more and 1.5 mm or less, and even more preferably 0.8 mm or more and 1.0 mm or less.

[0076] The small-hole elastomer sheet 3 may be produced by punching using a punch pin P10 instead of cutting using a cutter roll (see FIG. 17). Even when the small holes P are formed by punching, it is preferable that the raw sheet 3' is elongated to the above-mentioned degree of elongation. The perforation process can be performed, for example, by introducing the original sheet 3' in an elongated state between a pin roll having a plurality of perforation pins P10 on its peripheral surface and an anvil roll. Alternatively, the original sheet 3' in an elongated state may be introduced between a perforation jig having a plurality of perforation pins P10 protruding from a substrate and a pin receiving jig that receives the perforation pins, and the perforation jig may be raised and lowered relative to the original sheet 3'.

[0077] The diameter of the piercing pin P10 is preferably 0.1 mm or more and less than 1.5 mm, and more preferably 0.5 mm or more and 1.0 mm or less. The pin receiving jig may have a receiving hole for receiving the piercing pin. In this case, the diameter of the receiving hole is larger than the diameter of the piercing pin by preferably 0.1 mm to 10 mm, more preferably 0.5 mm to 2.0 mm. The pin receiving jig does not have to have a receiving hole, and may be made of a foam such as polystyrene foam.

[0078] When a pair of rolls including a cutter roll or a pin roll and an anvil roll is used for the cutting or punching, the diameter of the cutter roll or the pin roll is preferably more than 100 mm. With this configuration, the deflection of the roll due to the reaction force from the raw sheet 3' during cutting or punching is suppressed, so that the accuracy of forming the small holes P can be further improved.

[0079] In this embodiment, after forming the small hole regions in the raw sheet 3', the sheet is cut to a predetermined size to obtain the small hole elastomer sheet 3. Then, after pouring the liquid f into the storage section 24 of the container body 20 obtained by assembling plate-like members and the like, the obtained small-pore elastomer sheet 3 is joined to the container body 20. In this embodiment, the small-pore elastomer sheet 3 is joined to the container body 20 using a known joining means such as adhesive or heat sealing. In this way, the liquid storage container 1 is obtained.

[0080] The small-pore elastomer sheet 3 obtained by the above-mentioned production method has a ratio of the restoration displacement to the displacement [(restoration / displacement)×100] of preferably 50% to 100%, more preferably 70% to 100%, and even more preferably 80% to 99%. The value of the restoration displacement to the displacement is measured by the following method.

[0081] [Method of measuring the amount of restoring displacement relative to the amount of displacement] The four sides of the measurement target sheet (small-pore elastomer sheet 3) cut into 85 mm squares are gripped and the sheet is spread out horizontally. The sheet is left in its natural flat state without stretching, and the four sides of the sheet are sandwiched and the sheet is gripped horizontally away from the horizontal plane. The four sides of the sheet are gripped with a gripping jig that is long in one direction. The central part of the sheet (80 mm square) that is not gripped is the stretchable area. Next, the central part of the sheet is pressed and the sheet is pressed 20 mm downward from the height of the sheet before pressing, and after the displacement amount is 20 mm, the height of the sheet is measured when the pressure is released, and this is the restoration displacement amount. The pressing speed is 20 mm / sec. Then, the restoration displacement amount (mm) for the displacement amount of 20 mm is calculated. The jig that presses the central part of the sheet is a jig with a cylindrical protrusion protruding from a base plate and a pressing part at the tip of the protrusion. The pressing part is made of urethane rubber with a Shore hardness of A50 and has a rounded tip with a diameter of 15 mm. Shore hardness can be measured based on JIS Z2246 (Shore hardness test - test method).

[0082] The present invention is not limited to the above-described embodiment and can be modified as appropriate. In addition, the above-described embodiments may be combined. For example, the small-pore elastomer sheet 3 in the above-described embodiment has a plurality of small holes P arranged in a staggered pattern, but the arrangement pattern of the small holes P is not limited to this. The small holes P in the small-pore elastomer sheet 3 may be formed over the entire area of ​​the discharge section E, or may be formed partially in the discharge section E. An example of the latter is a configuration in which the central part of the discharge section E is a non-small-pore region, and a small-pore region is formed in a ring shape so as to surround the non-small-pore region. Furthermore, the liquid storage container of the present invention is capable of storing liquid in the storage portion 24, and includes both a form in which liquid is stored and a form in which no liquid is stored. [Explanation of symbols]

[0083] 1, 1a, 1b, 1c, 1d, 1e Liquid storage container 3. Small-pore elastomer sheet 7 Impregnated body 20 Container body 21,51 aperture 23,23a,53 Bottom part 24,54 Storage section 27,57 Peripheral wall part 29 Virgin Seat 40 Upper cylinder part 41 Upper opening 42 Pressing means 43 Sheet contact area 44 Pressing operation section 46 Central cylinder part 50 Main body cylinder 60 Cutter Roll 61 Blades 63 Anvil Roll C Liquid supply surface E Discharge section f liquid P small hole Z height direction

Claims

1. It has a storage section that can hold liquid inside and is equipped with a discharge section for discharging the liquid to the outside. The discharge section is formed from a perforated elastomer sheet, which has a plurality of perforations, and these perforations can be opened and closed by expansion and contraction. A liquid supply surface is located within the containment section at a position separated from the discharge section, and the liquid supply surface is the surface of the liquid or the surface of the impregnated body impregnated with the liquid. A liquid container wherein pressing the discharge portion presses the discharge portion against the liquid supply surface, thereby discharging the liquid through the small hole, and releasing the pressure causes the discharge portion to separate from the liquid supply surface, so that the discharged liquid is held on the discharge portion.

2. The liquid container according to claim 1, wherein when the central part of the discharge part is pushed 5 mm from its natural position toward the liquid supply surface, the maximum reaction force of the discharge part is less than 10 N.

3. The liquid storage container according to claim 1 or 2, wherein when the height from the bottom of the storage portion to the discharge portion before pressing is taken as 100%, the height from the bottom of the storage portion to the discharge portion when the pressing is released is 70% or more.

4. The liquid container according to claim 1 or 2, wherein the durohardness of the porous elastomer sheet is A1 to A60.

5. The liquid container according to claim 1 or 2, wherein the thickness of the porous elastomer sheet is 10 μm or more and 500 μm or less.

6. The oxygen permeability coefficient of the aforementioned porous elastomer sheet is 1.0 × 10 －１５ (mol・m / m) ２ A liquid container according to claim 1 or 2, wherein the pressure is sec・Pa or higher.

7. A liquid container according to claim 1 or 2, comprising a pressing operation section and a pressing means having a sheet contact section that works in conjunction with the pressing operation section to press the discharge section, and a biasing means that biases the pressing means in a direction away from the discharge section.

8. A virgin sheet indicating that the liquid container is unused is placed between the discharge section and the liquid supply surface. The liquid container according to claim 1 or 2, wherein, upon first use of the liquid container, the virgin sheet is torn by pressing the discharge portion, allowing the discharge portion to come into contact with the liquid supply surface.

9. The storage section is divided into multiple spaces by a virgin sheet indicating that the liquid storage container is unused, and different contents are stored in the space on the discharge side of the virgin sheet and in the space on the opposite side of the discharge side of the virgin sheet. The liquid container according to claim 1 or 2, wherein, upon first use of the liquid container, the virgin sheet is torn by pressing the discharge section, causing the different contents to mix together to form a mixed liquid, and the liquid surface of the mixed liquid becomes the liquid supply surface.

10. The liquid container according to claim 1 or 2, wherein the liquid is volatile and has a evaporation rate of 3 g / day or more as measured by the method described below. <Method for measuring the rate of volatilization> 50 g of the liquid is weighed into a 50 cc glass beaker with a diameter of 43 mm, and left to stand for 3 days at room temperature of 24 ± 2°C and humidity of 50% ± 4%. During this time, the amount of liquid lost is measured every 12 hours and converted to the amount of liquid lost per day. The average daily amount of liquid f is then calculated and defined as the evaporation rate (g / day).

11. A porous elastomer sheet having multiple small pores, The thickness is 10 μm or more and 400 μm or less. The durohardness is A1 to A60. The small holes can be opened and closed by expansion and contraction, and A small-perforated elastomer sheet in which, while holding the four sides of a sheet cut to 85 mm square, the center of the sheet is pressed to displace it by 20 mm in the direction normal to the sheet, and when the pressure is released, the amount of return displacement is 50% to 100% of the aforementioned 20 mm.

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