Fluid sealed container

Abstract

To provide a flexible fluid sealed container which is used by hanging around a neck of a user, and where a bag is hardly broken when an impact is applied from the outside.SOLUTION: A fluid sealed container includes a cylindrical body part formed of a flexible film and an injection port part which is connected to the cylindrical body part and is constituted to open and close to hermetically seal the cylindrical body part and is used by hanging around a neck of a user. The film is constituted of a thermoplastic resin and is not water permeable. The cylindrical body part includes a peripheral edge seal part for bonding end parts of the film at a peripheral edge of the cylindrical body part and an inner seal part for bonding a part of inner surfaces of the film in the inside of the cylindrical body part. Seal strength of the inner seal part is smaller than that of the peripheral edge seal part, and regions with the inner seal part in between inside the cylindrical body part communicate with each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fluid-tight container that is worn around a user's neck. [Background technology]

[0002] In some cases, fluids such as hot water, carbon dioxide gas, hot water containing carbon dioxide gas, cold water, etc. are sealed in a container and hung around the user's neck for the purpose of keeping the area around the neck warm, promoting blood circulation, cooling, etc. For example, by hanging a flexible container in which hot water or the like is sealed around the user's neck, a warming effect can be obtained and blood circulation can be promoted.

[0003] Patent Document 1 also discloses a cloth holder that has an elastically deformable main body that can be hung around a person's neck to cover the back and both sides of the neck, and a fixing part for fixing a cloth, and with the cloth fixed by the fixing part, the main body is hung around the person's neck via the cloth, so that the cloth is held between the main body and the back and both sides of the person's neck.It also discloses that by storing a liquid (water, etc.) in the storage part of the main body, the towel can be cooled by the liquid, and it becomes possible to cool the area around the neck via the towel. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-048480 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, flexible containers used to seal such fluids usually emphasize ease of application (such as flexibility) around the neck, and therefore do not have sufficient resistance to external impacts, and tend to break when subjected to external impacts such as being dropped or stepped on. In the case of containers that seal fluids containing liquids, such breakage may cause the user's body to become soiled, which is particularly undesirable.

[0006] The present invention has been made in view of the above problems, and relates to a flexible fluid-tight container that is worn around a user's neck and is resistant to rupture even when subjected to an external impact. [Means for solving the problem]

[0007] The present invention relates to a fluid-tight container that is worn around a user's neck and includes a cylindrical main body portion formed from a flexible film, and an injection port portion that is connected to the cylindrical main body portion and is configured to be openable and closable so as to seal the cylindrical main body portion, wherein the film is made of a thermoplastic resin and is water-impermeable, and the cylindrical main body portion has a peripheral seal portion that joins the ends of the film together at the periphery of the cylindrical main body portion, and an inner seal portion that joins parts of the inner surfaces of the film together inside the cylindrical main body portion, and the seal strength of the inner seal portion is smaller than the seal strength of the peripheral seal portion, and the areas inside the cylindrical main body portion on either side of the inner seal portion are connected to each other. Effect of the Invention

[0008] According to the present invention, it is possible to provide a flexible fluid-tight container which is worn around the neck of a user and is resistant to rupture even when subjected to an external impact. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view of a fluid-sealed container according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 2 is a front view of the fluid-sealed container according to the embodiment before the fluid is sealed therein. [Figure 4] FIG. 2 is a schematic diagram of an example of using the fluid-sealed container according to the present embodiment by hanging it around the neck. [Diagram 5] FIG. 11 is a perspective view of a modified example of the fluid-sealed container according to the embodiment. [Figure 6] FIG. 11 is a perspective view of another modified example of the fluid-tight container according to the embodiment. [Figure 7] FIG. 11 is a perspective view of yet another modified example of the fluid-tight container according to the embodiment. [Figure 8] 8A is a cross-sectional view taken along line VIII-VIII in FIG. 1, and FIG. 8B is a cross-sectional view showing a state after an external impact is applied to an end of the cross-sectional view. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In all drawings, similar components are given the same reference numerals, and duplicated descriptions are omitted as appropriate. In addition, in some drawings, there are some parts that are not given reference numerals (omitted) for convenience. Furthermore, the dimensional ratios of each member shown in the drawings may differ from the actual dimensional ratios in order to facilitate understanding of the invention.

[0011] <Overall composition> The overall configuration of the fluid-sealed container 100 according to this embodiment will be described with reference to Figs. 1 to 8. Figs. 1 and 5 to 7 are overall views showing the fluid-sealed container 100 according to this embodiment in a state in which a fluid is sealed in the internal region 41 of the tube main body 31, and Fig. 3 is an overall view showing the fluid-sealed container 100 according to this embodiment in a state (flat) before a fluid is injected into the internal region 41 of the tube main body 31. Fig. 4 is a schematic view showing an example in which the fluid-sealed container 100 according to this embodiment in which a fluid is sealed in the internal region 41 of the tube main body 31 is used by hanging it around the neck. Figs. 2 and 8 are cross-sectional views of the tube main body 31 of the fluid-sealed container 100 according to this embodiment.

[0012] The fluid-tight container 100 according to the present embodiment is used by hanging it around the neck of the user as shown in FIG. 4, and includes a tube body 31 formed of a flexible film 25 and an inlet 11 connected to the tube body 31 and configured to be openable and closable, and capable of sealing the tube body 31, as shown in FIG. 1 and FIG. 5 to FIG. 7. A fluid is injected into the tube body 31 through the inlet 11 and sealed (enclosed) for use. Furthermore, the fluid sealed in the fluid-tight container 100 can be replaced through the inlet 11 for use, that is, the fluid enclosed in the fluid-tight container 100 can be replaced and used repeatedly. The enclosed fluid includes liquid, gas, liquid in which gas is dissolved, liquid in which gas is dispersed and mixed, liquid containing bubbles containing gas, and gas-liquid mixture in which gas and liquid are separated. The flexible film 25 forming the tube main body 31 is made of a thermoplastic resin and is water impermeable. The tube main body 31 has a peripheral seal 33 that joins the ends of the film 25 together at the periphery of the tube main body 31, and an inner seal 35 that joins parts of the inner surfaces of the film 25 together inside the tube main body 31, and the seal strength of the inner seal 35 is smaller than that of the peripheral seal 33. The regions inside the tube main body 31 that sandwich the inner seal 35 communicate with each other. In other words, the inner seal 35 only partially separates the internal region 41 of the tube main body 31, and does not completely separate the regions inside the tube main body 31 that sandwich the inner seal 35. As a result, when a certain degree of external impact is applied to the tube main body 31 by being dropped or the like, the internal pressure of the fluid in the internal region 41 causes the internal seal portion 35 to peel off before the peripheral seal portion 33, and the internal volume of the tube main body 31 (in other words, the cross-sectional area of ​​the region where the internal seal portion 35 is formed) increases, making the bag less likely to break. This makes it easier to prevent the fluid enclosed in the tube main body 31 from leaking to the outside. In addition, the internal volume of the tube main body 31 is somewhat reduced by the formation of the internal seal portion 35 before this peeling, making it difficult to make the weight of the fluid-sealed container 100 according to this embodiment when it contains a fluid (particularly a liquid) excessively heavy. Here, "used by hanging it around the neck of the user" means that the fluid-sealed container 100 containing the fluid is used by straddling both sides of the user's neck, and includes, for example, a mode in which it is used by hanging it from the neck to the shoulder or along the chest. Therefore, when the fluid-sealed container 100 is used by hanging it around the neck, the fluid-sealed container 100 may come into contact with areas other than the neck (for example, the shoulder or chest). The same applies hereinafter.

[0013] <Cylinder body> First, the configurations of the cylindrical main body 31 and the peripheral seal portion 33 and inner seal portion 35 provided on the cylindrical main body 31 of the fluid-sealed container 100 according to this embodiment will be described in detail with reference to Figs.

[0014] The tube main body 31 is a tube-shaped member having an internal region 41 (internal space) capable of sealing a fluid, and is a member that becomes the main body of the fluid-sealed container 100. This tube main body 31 is formed of a flexible film 25. That is, the flexible film 25 is formed by molding and bonding so as to have a tube shape having an internal space. Therefore, this tube main body 31 is also flexible.

[0015] Specifically, flexible film 25 is formed into a cylindrical shape, and at its periphery, except for the region connecting injection port 11, ends of film 25 are joined together to form peripheral seal portion 33, forming cylindrical tube main body 31 having an internal space into which a fluid can be injected. This peripheral seal portion 33 may be formed so as to protrude inward (toward internal region 41) when formed into tube main body 31, as shown in Fig. 2, for example, or may be formed so as to protrude outward (toward the outside of the container) when formed into tube main body 31. Furthermore, it may be formed so as not to protrude inward or outward, or may be formed by combining two or more selected from these. 2, not only does the tube body 31 feel better when it is placed directly against the skin, but when an impact is applied from the outside, the internal pressure of the fluid contained in the tube body 31 acts in a direction pressing the inwardly protruding peripheral seal 33 from both sides, making it easier to prevent the bag from breaking at the peripheral seal 33. On the other hand, in the embodiment in which the peripheral seal 33 is formed to protrude outward, the peripheral seal 33 is easier to form. Furthermore, in this tube main body 31, the inner surfaces of the film 25 are joined together inside the tube shape to form an inner seal portion 35 having a seal strength lower than that of the peripheral seal portion 33. For example, as shown in Figures 1 and 2, an inner seal portion 35 is exemplified in which the inner surfaces of the film 25 in the tube main body 31 are joined together (the inner surfaces are joined so as to overlap each other) so as to divide a part of the internal region 41 of the tube main body 31 into two or more cylindrical shapes. It is more preferable that this inner seal portion 35 and the peripheral seal portion 33 are configured to be separated (not in contact).

[0016] In addition, the regions (parts of the internal region 41) inside the tube main body 31 sandwiching the internal seal portion 35 communicate with each other. In other words, it can be said that the internal region 41 of the tube main body 31 is partially separated by the internal seal portion 35, and the regions inside the tube main body 31 sandwiching the internal seal portion 35 are configured so that the enclosed fluid can move back and forth between regions such as the end 35a on the end 38 side of the tube main body 31 in the longitudinal direction of the internal seal portion 35 and the end 35b on the opposite side (approximately the center side of the entire length in the longitudinal direction of the tube main body 31). This allows the fluid to be injected into the entire tube main body 31 from one injection port portion 11, and further makes repeated use (replacement of the fluid in the tube main body 31) easy. This also makes it easier for force to be transmitted to the internal seal portion 35, which has a small seal strength, due to the internal pressure of the fluid, when an impact is applied from the outside to the fluid-sealed container 100 according to this embodiment. In particular, it is more preferable that the internal regions of the tube main body 31 sandwiching the inner seal portion 35 communicate with each other at two or more points.

[0017] It is more preferable that the inner seal portion 35 is formed along the longitudinal direction of the tube main body portion 31. This is because the inner seal portion 35 is more likely to peel off when an external impact is applied to the fluid-sealed container 100 according to this embodiment (particularly the end portion 38 of the tube main body portion 31). The inner seal portion 35 being along the longitudinal direction of the tube main body portion 31 includes an embodiment in which the extension direction of the inner seal portion 35 is completely parallel to the longitudinal direction of the tube main body portion 31, as well as an embodiment in which the extension direction of the inner seal portion 35 is substantially parallel to the longitudinal direction of the tube main body portion 31. The extension direction of the inner seal portion 35 being substantially parallel to the longitudinal direction of the tube main body portion 31 means that the angle between the extension direction of the inner seal portion 35 and the longitudinal direction of the tube main body portion 31 is less than 45 degrees, and the extension direction of the inner seal portion 35 includes more longitudinal components than transverse components of the tube main body portion 31. For example, as shown in FIG. 1 and FIG. 5 to FIG. 7, it is preferable that the inner seal portion 35 has an elongated shape and its longitudinal direction is aligned with the longitudinal direction of the tube main body portion 31. The inner seal portion 35 may have a continuous elongated shape (approximately straight line shape), or may have an elongated shape (approximately dotted line shape) separated at an interval less than the seal width (length in the short direction) of the inner seal portion 35, but is preferably a continuous elongated shape from the viewpoint of ease of peeling. In addition, the longitudinal length of each of the elongated inner seal portions 35 is preferably half or more of the length of the maximum body width D of the tube main body portion 31, for example, 50 mm or more. Here, the "maximum body width D of the tube main body portion 31" is the maximum width when the tube main body portion 31 is flat in a state in which no fluid is sealed in the internal region 41 (D in FIG. 3, the same applies below). Moreover, the length of each of the substantially dotted inner seal portions 35 is the overall length of that one substantially dotted inner seal portion 35 (the length including the non-jointed portion included in the substantially dotted line). Furthermore, when a plurality of inner seal portions 35 are formed parallel or substantially parallel as in the embodiment shown in Fig. 5, the length mentioned above need only be the length of one of the inner seal portions 35 that has the longest longitudinal length among them, not the total length of these.

[0018] Furthermore, as described above, the seal strength of the inner seal portion 35 is smaller than that of the peripheral seal portion 33. Here, the "seal strength" refers to the strength of the bonding force between the films bonded at the seal portion, in other words, the strength of the force (peel strength) required to peel the films bonded at the seal portion from each other. Therefore, the seal strength of the inner seal portion 35 refers to the strength of the force required to peel the inner surfaces of the films 25 bonded at the inner seal portion 35 from each other, and the seal strength of the peripheral seal portion 33 refers to the strength of the force required to peel the ends of the films 25 bonded at the peripheral seal portion 33 from each other.

[0019] In particular, when the fluid-sealed container 100 according to this embodiment is subjected to an external impact, the inner seal portion 35 is more likely to peel off, so it is more preferable that the seal strength of the inner seal portion 35 is one-third or less of the seal strength of the peripheral seal portion 33. The seal strength is measured by peeling off the peripheral seal portion 33 and the inner seal portion 35 in a direction across the seal portion. The same is true for other seal portions. For example, as shown in FIG. 3, a region including the seal portion of the tube main body portion 31 (for example, the entire front and back of the portion surrounded by the dotted line) is used as a test piece, and the seal strength is measured by peeling off the seal portion in a direction across the seal portion (in the direction of the arrow). In this measurement, if the test piece is small, the test piece may be extended with a non-elastic tape such as a cloth tape or a lapie tape to make it easier to pinch it, and then the measurement may be performed. In addition, when a plurality of inner seal portions 35 are formed parallel or substantially parallel as in the embodiment shown in FIG. 5, the seal strength of the one with the strongest seal strength among them is compared with the seal strength of the peripheral seal portion 33 for evaluation. As a specific numerical value, it is more preferable that the seal strength of the inner seal portion 35 is 3N / 5mm or less. There is no lower limit, but it is sufficient that the seal strength is such that peeling is difficult when a fluid is injected from the injection port portion 11 or during normal use of the fluid-tight container 100, and it is particularly preferable that the seal strength is such that peeling is difficult to occur even when the fluid-tight container 100 according to this embodiment is used repeatedly (for example, 1N / 5mm or more). In this case, the seal strength of the peripheral seal portion 33 is preferably 6N / 5mm or more, and more preferably three times the seal strength of the inner seal portion 35 or more. Here, the numerical value of the seal strength is a value measured by a peel test conforming to JIS K 7127:1999, in which a test piece obtained by cutting out a region including the seal part in a width of 5 mm is placed in the above-mentioned JIS measurement environment at 25°C and 55% RH for 24 hours, and then a tensile test is performed at a tensile speed of 300 mm / min, and can be measured using, for example, Tensilon UCT-100W (manufactured by Orientec Co., Ltd.) When the inner seal part 35 is substantially dotted line-shaped, a test piece with a width of 5 mm is cut out so as to include the maximum joining portion of the inner seal part 35, and the seal strength is measured.

[0020] Furthermore, when the inner seal portion 35 itself is formed along the longitudinal direction of the tube main body portion 31, it is more preferable that the seal strength of the region including the end 35a on the end 38 side of the tube main body portion 31 in the longitudinal direction of the inner seal portion 35 is smaller than the seal strength of the region including the end 35b on the opposite side. In other words, it is preferable that the inner seal portion 35 has different seal strengths on the end 35a side and the end 35b side, with the seal strength on the end 35a side being smaller. This is because the end 35a of the inner seal portion 35 is likely to peel off when an impact is applied to the end 38 of the tube main body portion 31 from the outside.

[0021] The inner seal portion 35 and the peripheral seal portion 33 having such different seal strengths can be formed by using a joining method such as heat sealing (thermal fusion) by heat and pressure, high-frequency welding by dielectric heating, ultrasonic welding by ultrasonic vibration and pressure, and changing the conditions (temperature, pressure, electric field (voltage, etc.), frequency, seal mold, seal substrate distance, etc.) between the inner seal portion 35 and the peripheral seal portion 33. These can be appropriately selected depending on the constituent material of the film 25, etc. Also, they can be formed by changing the joining method between the inner seal portion 35 and the peripheral seal portion 33. Note that, as long as the above-mentioned difference in seal strength can be achieved, joining by using an easy peel resin or an adhesive with an appropriately adjusted adhesive strength and / or coating amount is also possible. Also, it is possible to use this adhesive in combination with various types of pressure seal (heat sealing or high-frequency welding). Furthermore, from the viewpoint that the fluid-tight container 100 according to the present embodiment can be a body-worn device that is directly applied to the skin around the neck, it is more preferable that the seal width of these seal parts is as narrow as possible (for example, 5% or less of the maximum body width D of the tube main body part 31, or 5 mm or less). And, since the end 35a of the inner seal part 35 is more likely to peel off, it is more preferable that the seal width of the region including the end 35a on the end 38 side of the tube main body part 31 in the longitudinal direction of the inner seal part 35 is smaller than the seal width of the region including the end 35b on the opposite side. It is more preferable that the formation of the seal part is performed by joining (melting) using high-frequency welding, which can perform joining and cutting in the same process and can relatively reduce micro-level changes on the surface of the seal part (the surface opposite to the joining surface).

[0022] In order to form the inner seal portion 35 and the peripheral seal portion 33 with different sealing strengths, it is preferable to create different sealing states between the inner seal portion 35 and the peripheral seal portion 33, which can be confirmed, for example, by observation under magnification. Specifically, when the cross section of each seal portion is observed at a magnification of about 100 times using a microscope such as Keyence's VHX-1000, it is preferable that the fused surfaces (interfaces) of the films at the peripheral seal portion 33 are melted and integrated, whereas the film interfaces at the inner seal portion 35 remain and the films are joined together. In addition, since the inner seal portion 35 is a seal portion that joins the inner surfaces of the films together inside the tube main body portion 31, it is preferable to select a method that can selectively perform a sealing action on the film interface (joint surface) without causing damage such as pinholes on the film surface or the vicinity of the seal portion (ends 35a, 35b, and the side surface of the inner seal portion 35) when forming the inner seal portion 35. Examples of a method for forming the inner seal portion 35 that does not damage the film surface include, for example, a process that combines application of an adhesive with an appropriately adjusted adhesive strength and application amount with a seal under weakened sealing conditions (for example, low temperature conditions), high-frequency welding under appropriate conditions, and a film with added plasticizer or lubricant and a peel-treated film are used as a technology for providing easy peelability, and the film interface is melted and integrated in the peripheral seal portion 33, and the sealing conditions are selected for the inner seal portion 35, which maintain the peel-treated surface and film interface. Such a formation method makes it possible to achieve smooth peeling of the inner seal portion 35 with an expected force.

[0023] In addition, when the tube main body 31 is planar (meaning a planar shape with no folds except for the periphery, with the fluid-sealed container 100 not filled with fluid and the tube main body 31 on which the inner seal 35 is formed being pressed flat so that both of the films 25 are overlapped flat, the same applies to other cases), the distance between the end 35a on the end 38 side of the tube main body 31 in the longitudinal direction of the inner seal 35 and the periphery of the planar tube main body 31 (for example, the periphery of the end 38) is preferably 10% or more of the maximum body width D of the planar tube main body 31. For example, in the embodiment of FIG. 3, the inner seal 35 is formed in a substantially straight line along the longitudinal direction of the tube main body 31, and the end 35a, which corresponds to one end of the inner seal 35 in the longitudinal direction (the lower end in FIG. 3), is close to the end 38 of the tube main body 31. 3, when the fluid-tight container 100 is viewed facing the pair of branched tube portions 31a branched into two, the peripheral seal portion 33 is located at the peripheral edge of the tube main body portion 31. That is, the peripheral seal portion 33 substantially coincides with the peripheral edge when the tube main body portion 31 is flat, and the inner seal portion 35 is not formed at the peripheral edge when the tube main body portion 31 is flat. In this flat fluid-tight container 100, the inner seal portion 35 is formed at a position where the distance between the end 35a on the end portion 38 side of the tube main body portion 31 in the longitudinal direction of the inner seal portion 35 and the peripheral seal portion 33 located at the peripheral edge of this end portion 38 is 10% or more (e.g., 10 mm or more) of the maximum body width D of the tube main body portion 31. Normally, when an external impact is applied to the end of a cylindrical container containing a fluid, the container is particularly prone to rupture, but with this configuration, even if an external impact is applied to the end 38 of the tube main body 31 while the fluid-sealed container 100 according to this embodiment contains a fluid, the inner seal portion 35 peels off before the tube main body 31 ruptures, and the internal volume of the tube main body 31 expands instantaneously. This reduces the internal pressure of the fluid-sealed container 100, preventing rupture.

[0024] For example, as shown in the cross-sectional view of Fig. 8(a), in this configuration, there is a region in which a certain amount of fluid is enclosed between the end 35a on the end 38 side of the tube main body 31 in the longitudinal direction of the inner seal portion 35 and the periphery (peripheral seal portion 33) of the end 38 of the tube main body 31. Therefore, when an impact is applied to the end 38 of the tube main body 31 (such as when the end 38 is dropped with the end facing downward), as shown in the cross-sectional view of Fig. 8(b), the region in which a certain amount of fluid is enclosed expands in a direction approximately perpendicular to the inner seal portion 35 due to the internal pressure of the fluid, and a force that peels off the inner seal portion 35, which has a low seal strength, is easily applied from this region. On the other hand, when the tube main body 31 is dropped generally horizontally, the internal pressure of the fluid is unlikely to concentrate at a specific location due to the impact, so that the peripheral seal 33 is unlikely to be damaged, and a force that would peel off the internal seal 35 is unlikely to be applied. Therefore, any part of the tube main body 31 is unlikely to be damaged, and the container can be easily used repeatedly. In other words, it can be said that the above-mentioned internal seal 35 is configured to be easily peeled off when an impact is applied that would cause the internal pressure of the fluid to concentrate at a specific location.

[0025] <Inlet> Next, the configuration of the injection port portion 11 connected to the cylindrical main body portion 31 of the fluid-sealed container 100 according to this embodiment will be described in detail.

[0026] The inlet 11 is connected to the tube body 31 (connected so as to be able to seal the tube body 31), and is configured to be able to inject and seal the fluid from here into the tube body 31, and to discharge the enclosed fluid. In other words, the inlet 11 is configured to be openable and closable, and is configured to be able to seal the tube body 31. Therefore, as long as it has such a configuration, there are no other limitations, but a configuration in which the inlet 11 has a detachable cap 15 and a cap mounting part, and a male screw shape and a female screw shape (spiral thread part) are formed on the inner circumference of the cap 15 and the outer circumference of the cap mounting part, and these are screwed together to be detachable and sealable, as shown in Figs. 1, 5 to 7, etc., is shown as a preferred example (particularly a preferred example when a fluid containing a liquid is used as the fluid). In other words, the inlet 11 does not have to be flexible. Furthermore, the cap 15 may be configured to be completely detachable from the fluid-tight container 100, or may be configured to be connected to the cap mounting part or the like by a hinge part or the like. Also, a non-detachable configuration may be used, such as a type in which the opening is opened and closed by sliding a cap-shaped member (slide type). By providing such an injection port portion 11, the fluid-sealed container 100 of this embodiment can not only be used by sealing a fluid in the cylindrical main body portion 31, but also, when, for example, hot water (water having a temperature of 30°C or higher and 60°C or lower) is sealed as the fluid, when the temperature of the sealed hot water drops, it can be discharged from the injection port portion 11 and new hot water can be injected and sealed for use, i.e., the fluid inside the cylindrical main body portion 31 can be replaced and the container can be used repeatedly.

[0027] In the fluid-sealed container 100 according to the present embodiment, the injection port 11 is preferably connected to a region of the tube main body 31 excluding the end 38, but not limited thereto. This is because when injecting a fluid into the tube main body 31, the fluid is less likely to be biased inside the tube main body 31. For example, in the case where the tube main body 31 is curved or bent as shown in Figs. 1, 5 and 6, it is particularly preferable that the injection port 11 is connected to a central portion of the entire length of the tube main body 31 in the curved or bent longitudinal direction, which is divided into three equal parts (for example, connected to a region including the curved or bent portion of the tube main body 31), since the bias described above is less likely to occur.

[0028] The size of the injection port 11 is not limited, but the opening diameter of the injection port 11 is preferably a size that allows easy injection of a fluid (particularly a fluid containing a liquid). Furthermore, the injection port 11 is preferably a size and material that allows it to function as a grip when injecting a fluid into the fluid-tight container 100 according to this embodiment or when using the fluid-tight container 100 according to this embodiment. Therefore, although a resin or metal having rigidity is shown as a suitable material for the injection port 11, from the viewpoint of weight reduction of the fluid-tight container 100 according to this embodiment, it is more preferable that the injection port 11 is made of a resin material such as a thermoplastic resin such as polyethylene resin (PE), polypropylene resin (PP), polyvinyl chloride (PVC), polystyrene (PS), nylon (Ny), acrylonitrile-butadiene-styrene copolymer (ABS) resin, polyethylene terephthalate (PET), polylactic acid (PLA), polycarbonate (PC), or a cast curing resin such as an epoxy resin or urethane resin. The same applies to the case where the above-mentioned cap 15 is provided.

[0029] In addition, the injection port 11, which also functions as a gripping portion, is preferably configured to be easily gripped with one hand. For example, in the embodiment of FIG. 1, the preferred diameters and lengths of the cap 15 and cap mounting portion of the injection port 11 (the opening diameter of the injection port 11 and its vertical length) are both 20 mm to 100 mm, more preferably 30 mm to 60 mm. By setting the diameters and lengths in this manner, the fluid-sealed container 100 according to this embodiment, in which a fluid is sealed, can be easily gripped with one hand. Furthermore, the fluid-sealed container 100 according to this embodiment may be configured such that a portion of the cylindrical main body 31 and a portion including the injection port 11 are integrated together to function as a grip portion.

[0030] In addition, it is preferable that the injection port 11 is connected to a region of the tube body 31 excluding a region that may come into contact with the neck of the user. This is because when the fluid-sealed container 100 according to the present embodiment in which the fluid is sealed is used, the injection port 11 is unlikely to come into contact with the neck or the like, and the feeling of use is unlikely to deteriorate.

[0031] <Film> Next, the configuration of the film 25 forming the cylindrical main body 31 of the fluid-sealed container 100 according to this embodiment will be described in detail.

[0032] The flexible film 25 forming the tube main body 31 of the fluid-tight container 100 according to this embodiment is not limited to any other configuration as long as it is made of a thermoplastic resin and the entire film is water-impermeable. In the present invention, "made of a thermoplastic resin" means that it is made of a resin containing a thermoplastic resin as a main component. This is preferable because when a user seals a fluid in the fluid-tight container 100 according to this embodiment and hangs it around the neck, the tube main body 31 has a moderate flexibility and easily conforms to the skin around the neck, and even if a liquid is used as the fluid, the liquid does not directly contact the skin that is in contact with the tube main body 31. Note that water-impermeable here means that it does not allow liquids such as water to pass through. Therefore, the film 25 may have a certain degree of gas (carbon dioxide gas, etc.) permeability. For example, the film 25 may have a gas permeability to such an extent that when a gas is sealed in the fluid-tight container 100 according to this embodiment, the shape of the gas sealed in the container 100 is substantially maintained for at least one hour. Here, "containing as a main component" means that the thermoplastic resin accounts for more than 50% by mass of the total resin, more preferably 70% or more, and even more preferably 90% or more.

[0033] The thermoplastic resin is not limited as long as it is capable of forming a flexible and water-impermeable film 25. Specific examples include polyolefin resins such as polyethylene resin (PE), polypropylene resin (PP), and methylpentene resin, polyester resins such as polystyrene (PS), ABS resin, AS resin, polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), and polyethylene terephthalate (PET), polyvinyl chloride (PVC), and rubber resins. For example, the film 25 can be a single layer made of one selected from the group consisting of these, a mixed layer made of two or more selected from the group consisting of these (a mixed layer of single layers), or a multilayer in which a plurality of these single layers or mixed layers are laminated. Examples of methylpentene resins include copolymers of 4-methyl-1-pentene and other α-olefins (propylene, ethylene, etc.) (4-methyl-1-pentene α-olefin copolymers), as disclosed in JP 2016-121322 A. Moreover, the rubber-based resin refers to, for example, block copolymer resins such as SBS, SEBS, SIS, etc. Furthermore, since these rubber-based resins have high tackiness at room temperature (10°C or higher and 35°C or lower), a layer made of this rubber-based resin can be used as an intermediate layer of the multi-layered film 25 (an intermediate layer sandwiched and laminated between the outermost layer that is the most external side of the fluid-tight container 100 and the innermost layer that is the most internal side of the fluid-tight container 100) for the purpose of improving the feel and brittleness.

[0034] In particular, it is more preferable that film 25 be made of a polyolefin resin, since this makes it easier to increase flexibility and to form inner seal portion 35 and peripheral seal portion 33 with different sealing strengths (particularly by high-frequency welding). Furthermore, when blow molding is selected as the manufacturing method for film 25, in addition to the above-mentioned resins (particularly polyolefin-based resins or polyester-based resins) as preferred resins, polyamide (nylon), EVOH (ethylene-vinyl alcohol copolymer), etc. can also be used as the above-mentioned single layer, mixed layer, or multilayer.

[0035] Furthermore, at least a portion of the film 25 has a carbon dioxide gas permeability of 10 L / (m2) measured at 23° C. and 0% relative humidity according to JIS K7126-1. 21·day·atm) or more. In other words, it is preferable that at least a part of the region of the film 25 forming the tube main body portion 31 has the above-mentioned carbon dioxide gas permeability. The entirety (whole region) of the film 25 forming the tube main body portion 31 may have the above-mentioned carbon dioxide gas permeability. With this configuration, when carbon dioxide gas-containing hot water or carbon dioxide gas is enclosed in the tube main body portion 31 and the tube main body portion 31 is placed in contact with the skin around the neck or the skin around the collarbone of the shoulder, the enclosed carbon dioxide gas is easily transferred to the skin through the film 25, making it easier to obtain the blood circulation promoting effect of the carbon dioxide gas.

[0036] The carbon dioxide gas permeability of the film 25 measured in accordance with JIS K7126-1 at 23°C and 0% relative humidity is set to a lower limit of 10 L / (m 2 ·day·atm) or more, but 13L / (m 2 ·day·atm) or more is preferable, and 15L / (m 2 ·day·atm) or more, and 16L / (m 2 ·day·atm) or more is more preferable. And the upper limit is 100L / (m 2 ·day·atm) or less, and 50L / (m 2 ·day·atm) or less is preferable, and 25L / (m 2 ·day·atm) or less, and more preferably 20 L / (m 2 It is more preferable that the elastic modulus is equal to or less than 1.0 MPa (days atm). This allows the above-mentioned effects to be exhibited and maintains a high strength for repeated use.

[0037] In particular, it is more preferable that the film 25 is made of a polyolefin resin, and further, that the polyolefin resin contains 4-methyl-1-pentene alpha-olefin copolymer. The film 25 made of the polyolefin resin containing 4-methyl-1-pentene alpha-olefin copolymer is water impermeable and has a high affinity with carbon dioxide gas, so that it is easy to make it have the above-mentioned carbon dioxide gas permeability, and further, when the film 25 contains a fluid of about 30°C to 60°C, or even about 35°C to 50°C, the flexibility of the film 25 increases depending on the temperature, and the conformability to the skin around the neck is particularly improved, so that when the fluid-sealed container 100 according to this embodiment is used by sealing, for example, hot water containing carbon dioxide gas, the blood circulation promoting effect is more easily obtained. And, compared with films 25 made of other thermoplastic resins, films 25 made of polyolefin resins containing 4-methyl-1-pentene α-olefin copolymers tend to be more susceptible to tearing at the peripheral seal portion 33 and the like due to external impact, but by having the inner seal portion 35 and the peripheral seal portion 33 with different seal strengths as described above, it is possible to make such films 25 less susceptible to tearing. When forming the inner seal portion 35 and the peripheral seal portion 33 with different seal strengths in the film 25 made of polyolefin resins containing 4-methyl-1-pentene α-olefin copolymers, it is more preferable to form them by high-frequency welding from the viewpoint of ease of formation.

[0038] The total thickness of film 25 is not limited as long as it is flexible and impermeable, but from the viewpoints of ease of application around the neck, strength, etc., it is more preferably 200 μm to 800 μm, even more preferably 300 μm to 700 μm, and even more preferably 400 μm to 650 μm. Film 25 with such a total thickness is likely to have a thermal conductivity of 0.1 W / (m·K) or more, and even more preferably 0.15 W / (m·K) or more, and is therefore preferable in terms of providing a sufficient warming effect when hot water or the like is enclosed, and a sufficient cooling effect (such as prevention of heat stroke) when cold water or the like is enclosed.

[0039] Here, a specific example of the embodiment of the fluid-tight container 100 according to this embodiment will be described in more detail with reference to FIG. 1 and FIG. 4 to FIG.

[0040] First Embodiment The fluid-sealed container 100 according to this embodiment is preferably an embodiment (first embodiment) as follows. Specifically, this first embodiment includes a tube main body 31 formed of the above-mentioned flexible film 25 and an injection port 11 connected to the tube main body 31, the tube main body 31 having the above-mentioned peripheral seal portion 33 and inner seal portion 35 with different seal strengths, and the tube main body 31 includes two branched tube portions 31a that branch into two toward both sides of the injection port 11, and is curved or bent, and each of the two branched tube portions 31a has an inner seal portion 35 formed therein. The internal regions of the tube main body 31 that sandwich the inner seal portion 35 are in communication with each other.

[0041] In the first embodiment, when the fluid-tight container 100 is sealed with a fluid and hung around the neck of a user, the two branched tube parts 31a of the tube main body part 31 can be easily hung on both sides of the neck so as to straddle the neck as shown in FIG. 4, and the fluid-tight container 100 can be stably attached from the neck to the shoulder and chest. Furthermore, the region where the inner seal part 35 of the tube main body part 31 (branched tube part 31a) is formed is likely to be stably positioned near the clavicles on both sides. Also, the region where the inner seal part 35 is formed is likely to come into contact with the skin near the clavicle over a wide area. In particular, it is more preferable from the viewpoint of stability and the like if the lengths from the ends of the ends 38 of the two branched tube parts 31a branched into two branches to the injection port part 11 are substantially the same.

[0042] For example, as shown in Fig. 1 and Fig. 5, the tube main body 31 is curved in a substantially U-shape, and as shown in Fig. 6, the tube main body 31 is bent in a substantially V-shape or a substantially Y-shape. The tube main body 31 may be curved or bent to close the loop so that the ends 38 are in contact with each other, or may be spaced apart from each other. These embodiments are preferably those that have such a shape not only in a state in which the tube main body 31 contains a fluid and is laid flat, but also in a two-dimensional state (flat state) in which the tube main body 31 does not contain a fluid. Here, the embodiment in which the ends 38 of the tube main body 31 are curved or bent to contact each other and form a closed loop does not include an embodiment in which the internal region 41 of the tube main body 31 is circularly connected, because this would make it difficult to use the tube main body 31 while hanging it around the neck.

[0043] When the fluid-tight container 100 of the first embodiment is used by hanging it around the neck so that the end 38 of the tube main body 31 is located on the front side of the body, the center of gravity of the fluid-tight container 100 is located forward (on the front side of the body) of the central axis of the neck or shoulder, and the fluid-tight container 100 is stably held in close contact from the neck to the shoulder and chest, as shown in Fig. 4. This is very preferable because the user does not need to hold the fluid-tight container 100 with his / her hands and can keep both hands free when using the fluid-tight container 100. In addition, since the center of gravity of the fluid-tight container 100 is located forward of the central axis of the neck or shoulder, the weight of the fluid-tight container 100 is likely to be applied especially around the collarbone, and furthermore, as described above, the area where the inner seal portion 35 is formed is likely to come into contact over a wide range, when hot water, hot water containing carbon dioxide, cold water, etc. are enclosed as a fluid, the warming effect, blood circulation promotion effect, cold feeling effect, cooling effect, etc. are likely to be fully exerted around the collarbone, etc.

[0044] In the case of the above-mentioned configuration in which the tube main body 31 is curved in a substantially U-shape, it is preferable that the two branch tube parts 31a are formed so as to approach each other toward their ends 38 at least in a state in which the fluid is enclosed in the tube main body 31. The ends 38 may also be formed so as to come into contact with each other. This is because it is easier to stabilize the fluid-sealed container 100 hung around the neck. Note that this refers to the shape of the fluid-sealed container 100 according to this embodiment in a state in which the fluid is enclosed in the fluid-sealed container 100 and is laid flat, and this configuration does not have to be satisfied in a flat state in which the fluid is not enclosed in the tube main body 31.

[0045] In this first embodiment, it is more preferable that the inner seal parts 35 formed in the two branched tube parts 31a are formed separately, sandwiching the region of the tube main body part 31 adjacent to the injection port part 11. When the fluid-sealed container 100 according to this embodiment is filled with fluid and hung around the neck of a user, the region of the tube main body part 31 where the inner seal part 35 is not formed is in close contact with the back of the neck, etc., and the effect of filling the fluid is more easily achieved. In addition, it is easier to inject the fluid into the tube main body part 31.

[0046] For example, as shown in Figures 1, 5 and 6, when the region from the connection part with the injection port 11 in the tube main body portion 31 to the end 38 of the branch tube portion 31a is divided into two equal parts, an inner seal portion 35 is formed in each of the regions closer to the end 38, and an inner seal portion 35 is not formed in each of the regions closer to the injection port 11 (the inner seal portions 35 formed in each of the regions closer to the end 38 are formed separately, sandwiching the injection port 11 and the region of the adjacent tube main body portion 31).

[0047] As shown in Fig. 5, the inner seal portion 35 may be formed in a plurality of the two branched tubular portions 31a along the longitudinal direction. In the embodiment of Fig. 5, the two branched tubular portions 31a each have two elongated inner seal portions 35 formed along the longitudinal direction, and the two inner seal portions 35 are also formed parallel to each other. With this configuration, when the fluid-tight container 100 is used by hanging it around the neck, the branched tubular portion 31a on which the inner seal portions 35 are formed is likely to come into contact with the skin near the collarbone over a wider area. Here, "along the longitudinal direction" has the same meaning as described above, and "parallel" has the same meaning as "substantially parallel" as described above. Furthermore, as a modification of this, one of the two branched tubular portions 31a may have one or more inner seal portions 35 formed therein, and the other branched tubular portion 31a may not have any inner seal portion 35 formed therein. For example, when the lengths from the ends of the ends 38 of the two branched tubular portions 31a to the injection port portion 11 are different from each other, one or more inner seal portions 35 may be formed only in the branched tubular portion 31a with the longer length (the branched tubular portion 31a that is more likely to fall). However, from the viewpoint of making it more difficult for the bag to break due to being dropped, etc., it is preferable that one or more inner seal portions 35 are formed in both of the two branched tubular portions 31a.

[0048] By forming the inner seal portion 35 to have an appropriate length in the tube body portion 31, the volume of the inner region 41 of the tube body portion 31 can be adjusted, and the weight of the fluid-containing container when used by hanging it around the neck can be appropriately reduced. In addition, the reduction in the volume of the inner region 41 of the tube body portion 31 may shorten the duration of the warming effect or the cooling effect, but in this case, by overlapping the tube body portion 31 with a muffler, stole, towel, or a special long cloth material as a heat insulating material, it is possible to increase the duration of the warming effect or the cooling effect without impairing the effect on the body. This is similar to other embodiments.

[0049] Here, this first embodiment does not include an embodiment in which the tube main body 31 branches into two at 180 degrees beyond the injection port 11. In other words, it does not include an embodiment in which the tube main body 31 connected to the injection port 11 branches into two toward both sides of the injection port 11, but this tube main body 31 is generally straight cylindrical (not curved or bent as a whole). This is because, since the injection port 11 is not connected to the end of the tube main body 31, which is generally straight cylindrical, it may be difficult for the user to hang it around the neck when using it.

[0050] Furthermore, as described above, the tube main body 31 in the first embodiment may be configured such that the lengths from the ends of the ends 38 of the two branch tube parts 31a to the injection port part 11 are different from each other. In other words, the lengths in the longitudinal direction (the curved or bent longitudinal direction of the tube main body part 31) of the two branch tube parts 31a branched into two toward both sides of the injection port part 11 may be different from each other. With such a configuration, the injection port part 11 is connected to a position offset from the midpoint of the entire length of the curved or bent longitudinal direction of the tube main body part 31, and since the injection port part 11 is not located directly behind the neck when used by hanging it around the neck, the injection port part 11 is less likely to hit the back of a chair when the fluid-sealed container 100 is used.

[0051] However, as described above, in the tube main body 31 in the first embodiment, it is preferable that the lengths from the ends of the ends 38 of the two branch tube parts 31a to the injection port part 11 as shown in Figures 1, 5 and 6 are substantially the same. In other words, it is preferable that the longitudinal lengths of the two branch tube parts 31a branched into two toward both sides of the injection port part 11 are substantially the same. With such a configuration, when a fluid (particularly a liquid) is injected into the tube main body part 31, unevenness is extremely unlikely to occur, the balance of the fluid-sealed container 100 is improved, and it is easier to achieve more stable and tight contact during use. It is also easier to use repeatedly.

[0052] <Second embodiment> The fluid-sealed container 100 according to this embodiment is also preferably in the following embodiment (second embodiment). Specifically, this second embodiment includes a tube main body 31 formed of the flexible film 25 described above, and an inlet portion 11 connected to an end 38 of the tube main body 31. The tube main body 31 has the peripheral seal portion 33 and the inner seal portion 35 having different seal strengths described above, and further, the tube main body 31 is straight. Also in this second embodiment, the internal regions of the tube main body 31 sandwiching the inner seal portion 35 communicate with each other. Here, this "straight tube" means that the tube main body 31 is substantially straight (substantially straight) when the fluid is sealed in the tube main body 31 and laid flat, and means a generally straight tube (the same applies to other cases).

[0053] In this second embodiment, since the injection port 11 is connected to the end 38 of the straight cylindrical tube main body 31, the straight cylindrical tube main body 31 can be bent by hand to fit the shape of the neck of the user, and it is easy to fit the tube to the neck regardless of the size or shape of the user. Since the injection port 11 is connected to the end 38 of the tube main body 31, this embodiment makes it easy for the injection port 11 to avoid the neck when the tube is hung around the neck. However, from the viewpoint of stability when hung around the neck, the first embodiment described above is preferable to the second embodiment.

[0054] In the second embodiment, as shown in Fig. 7, if the inner seal portion 35 is formed in a plurality of separate regions in the longitudinal direction of the tube body portion 31, it is more preferable because when the tube body portion 31 is worn around the neck and bent for use, the plurality of regions in which the inner seal portion 35 is formed in the longitudinal direction of the tube body portion 31 can be easily positioned near the collarbone, etc. However, the second embodiment may be an embodiment in which one inner seal portion 35 is formed (at one location). For example, when the tube body portion 31 is divided into two equal parts in the longitudinal direction, one inner seal portion 35 may be formed in the region that does not include the injection port portion 11.

[0055] In both the first and second embodiments, although not limited thereto, it is preferable that the film 25 forming the tube main body 31 has a film layer made of a polyolefin resin containing a methylpentene resin arranged as the outermost layer (the layer closest to the container outer side of the fluid-sealed container 100) in order to improve the carbon dioxide gas permeability and the feel when applied (particularly when a fluid of 30°C or more and 60°C or less is enclosed and directly applied). Furthermore, it is preferable that the film 25 forming the tube main body 31 has a three-layer structure in which an intermediate layer made of a styrene-based elastomer (for example, a styrene-based elastomer (SEBS), which is a copolymer of polystyrene, polyethylene, and polybutylene) is sandwiched between the outermost layer and the innermost layer, both of which are made of a polyolefin-based resin containing a 4-methyl-1-pentene α-olefin copolymer, in order to improve the flexibility and durability of the tube main body 31 and to improve the carbon dioxide gas permeability and the feel when applied. The same applies to other embodiments.

[0056] The fluid-sealed container 100 according to the present embodiment as described above has an inner seal portion 35 with a seal strength smaller than that of the peripheral seal portion 33 inside the tube main body portion 31, and the regions inside the tube main body portion 31 on either side of the inner seal portion 35 are connected to each other, so that when a certain degree of impact is applied to the tube main body portion 31 from the outside due to being dropped, etc., the inner seal portion 35 is easily peeled off first. Then, the peeling of the inner seal portion 35 increases the internal volume of the tube main body portion 31 and reduces the internal pressure, reducing the load on the peripheral seal portion 33, etc., and preventing the bag from breaking.

[0057] The fluid-sealed container 100 according to this embodiment can be used in a bathroom by pouring in hot water containing carbon dioxide gas in a bathtub (e.g., hot water containing bath salts) and the like. Since the container is water-impermeable and difficult to break, the fluid-sealed container 100 can be used safely in an office or the like by sealing in hot water.

[0058] The fluid-sealed container 100 according to this embodiment can be manufactured, for example, by forming the flexible film 25 into a cylindrical shape or by stacking and setting the film 25 in a predetermined mold, joining and cutting the film 25 to form the cylindrical main body 31 having the peripheral seal portion 33 and the inner seal portion 35 as described above, and then connecting the injection port portion 11 to a predetermined position of the cylindrical main body 31. Alternatively, a method such as blow molding in which the film 25 is joined and cut and expanded along a mold of a predetermined shape can be selected. This blow molding is a preferred method in the case of the second embodiment in which the cylindrical main body 31 is substantially straight cylindrical, since it is possible to reduce the peripheral seal portion 33 (the container can be made such that the peripheral seal portion 33 is less likely to come into contact with the skin during use). The difference in seal strength between the inner seal portion 35 and the peripheral seal portion 33 can be adjusted by adjusting the sealing conditions as described above. [Explanation of symbols]

[0059] 100 Fluid-tight container 11 Inlet section 15 Cap 25 Film 31 Cylinder body 31a Branch tube part 33 Peripheral seal 35 Inner seal 35a: the end of the inner seal portion on the end side of the tube body portion in the longitudinal direction 35b: the end of the inner seal portion opposite to 35a in the longitudinal direction 38 End of tube body 41 Internal region of the tube body D Maximum width of the tube body

Claims

1. A fluid-sealed container for use by hanging on a user's neck, comprising: a cylindrical main body formed of a flexible film; and an inlet portion connected to the cylindrical main body and configured to be openable and closable to seal the cylindrical main body, wherein the film is made of a thermoplastic resin and is water-impermeable, the cylindrical main body has a peripheral seal portion joining the ends of the film at the periphery of the cylindrical main body, and an inner seal portion joining a part of the inner surfaces of the film inside the cylindrical main body, the seal strength of the inner seal portion is smaller than the seal strength of the peripheral seal portion, and the regions inside the cylindrical main body sandwiching the inner seal portion communicate with each other, a fluid-sealed container.

2. The fluid-sealed container according to claim 1, wherein the inner seal portion is formed along the longitudinal direction of the cylindrical main body.

3. The fluid-sealed container according to claim 1 or 2, wherein the seal strength of the inner seal portion is 1 / 3 or less of the seal strength of the peripheral seal portion.

4. The fluid-sealed container according to claim 1 or 2, wherein the seal strength of the inner seal portion is 3 N / 5 mm or less.

5. The fluid-sealed container according to claim 1 or 2, wherein when the cylindrical main body is in a planar shape, the distance between the end-side end of the cylindrical main body in the longitudinal direction of the inner seal portion and the periphery of the cylindrical main body is 10% or more of the maximum width of the main body, which is the maximum width of the cylindrical main body when it is in a planar shape, and the inner seal portion is formed accordingly.

6. The fluid-sealed container according to claim 1 or 2, wherein the film is made of a polyolefin resin.

7. The fluid-sealed container according to claim 6, wherein the polyolefin resin contains 4-methyl-1-pentene α-olefin copolymer.

Images