Dip nozzle, and liquid container using the same

Abstract

To provide a dip nozzle capable of feeding liquid to be stored with no waste by discharging almost all the liquid, and securely preventing the remaining liquid from being spouted when an applied pressure is released.SOLUTION: A tubular dip nozzle 10 is inserted vertically into a liquid container body 30 in order to feed liquid 50 stored in the liquid container body 30 of a sealable liquid container 100 that is provided with a curved face 33 recessed onto an outside and / or an inclined face at a bottom 32. The dip nozzle 10 comprises: an upper end side large-diameter tube region 12 provided with engagement parts 11 and 15 engaged with an inside of a mouth part 39 and / or a neck part 38 of the liquid container body 30; an upper neck tube region 13 that is connected to the upper end side large-diameter tube region 12 and has the same diameter as or a reduced diameter than the same; and a small-diameter tube region 14 that is connected to the upper neck tube region 13, is reduced in diameter via a taper 18, and extends to a lower end 19. A pressure hole 17 penetrates through the upper neck tube region 13 in a horizontal direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a dip nozzle used in a liquid container for storing liquid and for pressurizing, discharging, and delivering liquid when necessary, and to a liquid container for storing liquid in the liquid container body of the liquid container and delivering liquid from the liquid container body. [Background technology]

[0002] Liquids such as high-purity industrial liquid medicines, such as photoresists and solvents used in the semiconductor and liquid crystal fields, high-purity medical liquid medicines, and food ingredient liquids must be stored, transported, and used in their high purity without any foreign matter. For this reason, such liquids are stored and transported in their liquid containers, and are used by setting them in a liquid delivery device as is, so as to minimize contact with the outside world. When delivering the liquid, gas is pumped into the liquid container, and the resulting pressure is used to discharge the gas from an exhaust pipe, delivering the liquid to the next process.

[0003] Patent Document 1 discloses a connection device consisting of a plug attached to the opening of a container in which liquid is stored and a socket connected to the plug, the plug having a lid body fixed to the opening in a liquid-tight manner, a plug portion provided on the lid body and connectable to the socket, and a siphon tube (liquid-transport tube) extending downward from the lower portion of the lid body and having a lower end located near the bottom of the container when the lid body is fixed to the opening, the siphon tube being a tube body integrally molded with the lid body. An inert gas is flowed in from the plug, and the stored liquid is discharged from the siphon tube by the pressure of the gas and transported.

[0004] In recent years, simplified liquid containers have become known in which a liquid feed tube and an inert gas supply port from a pressure source are integrated together.

[0005] For example, Patent Document 2 discloses a liquid delivery device that delivers liquid from a liquid container, the liquid container comprising a container body having a substantially cylindrical body, a round bottom, and a top portion having a discharge port (liquid delivery port) concentric with the body, capable of containing liquid and having a plug that can be attached and detached to the discharge port, and a resin support base that fits into the round bottom side of the body to make the container body self-supporting, the liquid container being set in the device, the liquid container being set in the device, and the liquid delivery device delivering liquid from the liquid container, the liquid container being set in the device, and a base having a protrusion that fits into the penetration portion of the support base and abuts against the round bottom of the container body, The liquid delivery device disclosed includes a liquid delivery adapter that can be attached and detached to the outlet and seal the container body in place of the stopper, and has a gas supply port connected to a pressurized source for supplying gas into the container body, and a liquid delivery tube whose end is located close to the bottommost part of the round bottom inside the container body and whose lower end is led out to the outside of the container body, and a pressing member that is movably mounted on a support that stands up from the base and can fix its movement at a position where it abuts against the upper part of the liquid delivery adapter fitted into the outlet.

[0006] As a further simplified plug structure, Patent Document 3 discloses a plug structure in which a cap mounting screw for a container inlet is used for a container with an external thread, the plug structure is equipped with a siphon tube (liquid supply tube) that is attached to the container inlet and is used to take out liquid from the container, the lower part of the plug body that is press-fitted into the container inlet is elastically deformable in the radial direction, and a locking claw that protrudes toward the inner wall surface of the container inlet is provided on the outer peripheral surface of the lower part of the plug body. Patent Document 3 illustrates a gas flow path that faces downward to supply gas introduced from the outside into the container.

[0007] However, if the gas flow path supplying gas from the outside into the container faces downward, the gas will flow toward the bottom end of the siphon tube toward the end of the liquid being discharged and pumped, pushing the liquid away from the bottom end of the siphon tube, resulting in valuable and expensive liquid being left behind without being pumped. Furthermore, when the transfer of liquid needs to be stopped or aborted before it is completely delivered, normally the internal pressure is released to normal pressure and then the connector is removed. However, if the connector is removed while there is residual pressure inside the container due to an abnormality such as a malfunction of the release valve or human error, there is a risk that the remaining liquid will spray out of the gas flow path, resulting in the waste of expensive chemical liquid or contamination of the surrounding area by the scattered chemical liquid. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2002-59993 A [Patent Document 2] JP 2011-98736 A [Patent Document 3] International Publication No. 2009 / 001726 Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve the above-mentioned problems, and has an object to provide a dip nozzle that can discharge almost all of the stored liquid, sending the liquid without waste, and that does not spray out any remaining liquid when pressure is released, and a liquid container using the same. [Means for solving the problem]

[0010] The dip nozzle made to achieve the above-mentioned object is a tubular dip nozzle which is inserted vertically (straight down) into a liquid container body of a sealable liquid container having a curved surface and / or an inclined surface recessed toward the outside at the bottom in order to deliver liquid contained in the liquid container body, and is characterized in that it has an upper end thick-diameter tube portion having a hook portion for hooking onto the inside of the mouth and / or neck of the liquid container body, an upper neck tube portion connected to the upper end thick-diameter tube portion and having the same diameter or a reduced diameter, and a thin-diameter tube portion connected to the upper neck tube portion, reduced in diameter via a taper, and extending to the lower end, and a pressurization hole penetrates the upper neck tube portion in a horizontal direction.

[0011] It is preferable that this dip nozzle has a flange portion on the outer periphery of the upper end large diameter tube portion as the hanging portion, and / or has a male screw that screws into the inside of the mouth portion and / or the neck portion as the hanging portion.

[0012] In this dip nozzle, the male screw may be a forward male screw that is screwed into the mouth portion and / or the neck portion to close the mouth portion and / or the neck portion with a lid, and a reverse screw or a forward screw.

[0013] The liquid container made to achieve the above-mentioned object has a curved surface and / or an inclined surface recessed toward the outside at the bottom, and is capable of sealingly storing liquid and discharging and delivering the liquid. The liquid container is inserted vertically to the curved surface on the inner surface of the liquid container body of the liquid container and / or toward the bottommost direction of the inclined surface, and is characterized in that it has an upper end thick-diameter tube portion having a hook portion for hooking onto the inside of the mouth and / or neck of the liquid container body, an upper neck tube portion connected to the upper end thick-diameter tube portion and having the same diameter or a reduced diameter, and a thin-diameter tube portion connected to the upper neck tube portion and reduced in diameter via a taper, extending to the lower end, and is equipped with a tubular dip nozzle having a pressurization hole extending horizontally through the upper neck tube portion, and a removable lid for sealingly storing the liquid at the mouth and / or neck.

[0014] This liquid container may comprise a cylindrical base having at its upper end a claw which engages with a groove provided continuously or intermittently on the outer periphery of the lower part of the liquid container body.

[0015] This liquid container may have a handle on a shoulder portion of the liquid container body that straddles the mouth and / or the neck, and / or may have a recessed handle recessed into the trunk portion of the liquid container body. Effect of the Invention

[0016] The dip nozzle of the present invention can discharge almost all of the stored liquid, delivering the liquid without waste, and does not spray out any remaining liquid when pressure is released, and a liquid container using the same can be provided.

[0017] By using a liquid container that uses the dip nozzle of the present invention, valuable and expensive liquids such as high-purity industrial liquid medicines, high-purity medical liquid medicines, and food ingredient liquids can be stably stored for long periods of time without coming into contact with the outside world by covering the liquid container with a lid.

[0018] Moreover, according to the liquid container using this dip nozzle, instead of a lid, it is possible to have an inner liquid supply tube that is inserted into the upper neck canal part and engages with the taper liquid-tightly and airtightly, a pressurizing outer tube that encloses the inner liquid supply tube and pressurizes the pressurizing hole while airtightly closing the opening of the upper neck canal part, and a connector that can be attached and detached while holding the inner liquid supply tube and the pressurizing outer tube, which are replaceable. This prevents the gas for pressurizing at the end of discharging and sending the liquid, such as an inert gas, from flowing toward the lower end of the dip nozzle and pushing the liquid away from the lower end of the dip nozzle, causing precious and expensive liquid to remain unsent. [Brief description of the drawings]

[0019] [Figure 1] 1 is a partially cutaway exploded view showing a liquid container having a dip nozzle according to the present invention in the process of being assembled; [Diagram 2] FIG. 2 is a partially cutaway assembly diagram of a liquid container having a dip nozzle to which the present invention is applied. [Diagram 3] FIG. 2 is a partially cutaway assembly diagram of a liquid container having a dip nozzle of another embodiment to which the present invention is applied. [Figure 4] 1 is an assembled cross-sectional view of a liquid container having a dip nozzle according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, embodiments for carrying out the present invention will be described in detail, but the scope of the present invention is not limited to these embodiments.

[0021] First, the dip nozzle 10 of the present invention will be described in detail.

[0022] This dip nozzle 10 is used in the liquid container 100 of the present invention, and will be described below with reference to Figure 1, a partially cutaway exploded view showing the liquid container 100 in the process of being assembled, in which the dip nozzle 10 is inserted into the liquid container body 30 of the liquid container 100 and sealed with the lid 20, and Figure 2, a partially cutaway assembly view showing the liquid container 100 after assembly.

[0023] The dip nozzle 10 has an upper end side large diameter tube section 12, an upper neck tube section 13 connected thereto below, and a small diameter tube section 14 connected thereto below with a reduced diameter via a taper 18.

[0024] The dip nozzle 10 is inserted into a liquid container body 30 when in use.

[0025] Liquid container body 30' is covered with bottom 32 and top surface 32', so that valuable and expensive liquids to be stored can be sealed to prevent leakage, for example, high-purity industrial liquid medicines such as photoresists and solvents used in the semiconductor and liquid crystal fields, high-purity medical liquid medicines, and food ingredient liquids. Bottom 32 is inclined toward the center and has curved surface 33 that is further recessed toward the outside, so that residual liquid 50' collects in the center (see FIG. 3(ii)).

[0026] As long as the dip nozzle 10 is capable of discharging and delivering as little of the liquid 50 contained in the liquid container body 30 as possible, there may be no gap between the curved surface 33 on the inner surface of the liquid container body 30 and the lower end 19 of the dip nozzle 10, but there may be a slight gap between them so that at least a portion of them are spaced apart. The lower end 19 of the dip nozzle 10 may be flat, tapered beveled, or semicircular notched. The dip nozzle 10 is inserted in a direction perpendicular to the curved surface 33 on the inner surface of the liquid container body 30 of the liquid container 100 .

[0027] The large diameter tube portion 12 on the upper end side of the dip nozzle 10 has a hook portion that is hooked onto the inside of the mouth portion 39 and / or the neck portion 38 of the liquid container body 30 . Specifically, the hook portion is provided on the outer periphery of the upper end of the upper end side thick diameter tube portion 12 so as to hook onto the mouth portion 39 of the liquid container body 30, and examples of such a hook portion include a flange portion 11 having a wider diameter than the mouth portion 39 of the liquid container body 30. The hook portion may be provided on the outer periphery of the upper end large diameter tube portion 12 in place of or together with the flange portion 11 so as to screw into the female screw 36 provided on the inside of the mouth portion 39 and / or neck portion 38 of the liquid container body 30, and may be a male screw 15 that screws into the female screw 36. When the male screw 15 screws into the female screw 36 on the inside of the mouth portion 39 and / or neck portion 38 of the liquid container body 30, it is possible to prevent the dip nozzle 10 from shifting and tilting or coming off, which would make it impossible to maintain airtightness and liquid tightness.

[0028] The upper neck pipe portion 13 of the dip nozzle 10 is connected to the upper end side large diameter pipe portion 12 and has the same diameter or a reduced diameter, and extends downward beyond the upper end side large diameter pipe portion 12.

[0029] The small diameter tube portion 14 of the dip nozzle 10 is connected to the upper neck tube portion 13, and is tapered via a taper 18 that contacts the upper neck tube portion 13, and extends to a lower end 19.

[0030] One or more pressurizing holes 17 are provided penetrating the upper neck tube portion 13 in the horizontal direction near the upper end side of the large diameter tube portion 12. The shape of the pressurizing hole 17 is not particularly limited, and may be a hollow cylinder, a hollow elliptical cylinder, a hollow polygonal cylinder, for example a hollow square, or a hollow truncated cone expanding or contracting toward the inner space of the liquid container body 30, but a hollow cylinder is preferable from the viewpoints of ease of molding and prevention of clogging.

[0031] It is sufficient that the pressurizing hole 17 faces substantially horizontally, and that the elevation or depression angle from the horizontal direction is less than 10°, including tolerances.

[0032] The diameter of the pressurizing hole 17 is not particularly limited, but considering that it is opened in the upper end side large diameter tube portion 12, it may be 1 to 5 mmφ, preferably 1 to 3 mmφ, and more preferably about 2 mmφ.

[0033] When the pressurizing hole 17 is provided, the gas for pressurizing, for example, an inert gas, flows through the pressurizing hole 17 in a substantially horizontal direction from the beginning to the end of discharging and feeding the liquid 50 (see the thick arrow in FIG. 3). As a result, the flow of the inert gas follows the inner wall of the liquid container body 30 and reaches the lower end 19 of the dip nozzle 10, and as a result, the remaining liquid 50' is pushed closer to the lower end 19 of the dip nozzle 10, particularly at the end of the feeding, so that the remaining liquid 50', which is valuable and expensive, is pushed away from the lower end 19 of the dip nozzle 10 and remains there without waste (see FIG. 3(ii)). If the pressurizing hole were facing downward as in the past, the gas for pressurization would flow toward the lower end 19 of the dip nozzle 10, and therefore the precious and expensive remaining liquid 50' would remain, particularly at the end of the feeding (see FIG. 3(i)). On the other hand, the effect of the pressurizing hole 17 facing horizontally is remarkable.

[0034] Furthermore, when the transfer of liquid is stopped or interrupted midway without completing the transfer, even if the connector is removed while there is residual pressure inside the container due to an abnormality such as a malfunction of the release valve or human error, there is no risk of the remaining liquid spraying out of the gas flow path, so there is no waste of expensive chemical liquid, making it economical and preventing contamination of the surrounding area by scattered chemical liquid.

[0035] The dip nozzle 10 may have a rubber-elastic gasket 16 fitted around the outer periphery of the upper end thick-diameter tube portion 12, on the upper neck tube portion 13 side closer to the flange portion 11 and male screw 15 which serve as the hanging portion, to create an airtight seal between the narrowed portion 35 inside the mouth portion 39 and / or neck portion 38 of the liquid container body 30 and prevent the pressure applied by the introduction of a gas, such as an inert gas, from escaping.

[0036] When the dip nozzle 10 has a male screw 15 on the outer periphery of the large diameter tube portion 12 at the upper end side, the male screw 15 is a reverse screw or a forward screw, preferably a reverse screw, and is a forward male screw (usually turned right to tighten and turned left to loosen) that is screwed into the lid 20 described later to close the mouth 39 and / or neck 38 of the liquid container body 30. When the lid 20 is released, the dip nozzle 10 can be prevented from coming loose.

[0037] Next, liquid container 100 having dip nozzle 10 will be described in detail with reference to FIGS.

[0038] 1 and 2, liquid container 100 has a cylindrical container body 30' of liquid container main body 30 covered with bottom 32 and top surface 32', dip nozzle 10 is inserted through opening 39 and / or neck 38 provided in top surface 32', and is sealed with lid 20 to seal liquid 50 so as not to leak, and has a structure that can be engaged and placed on cylindrical base 40. Liquid container 100 can contain liquid in a sealed manner and can discharge and deliver the liquid.

[0039] The liquid container body 30 may have a curved inclined surface at the bottom 32 that slopes toward the outside world toward the center, or the bottom 32 may have a curved surface 33 that is further recessed toward the outside world, and the lower end 19 of the dip nozzle 10 may face the bottom of the curved surface 33 and be in contact with or have a gap with the bottom of the curved surface 33.

[0040] The liquid container body 30 may have a flat bottom like a drum, or may have a raised bottom with the bottom periphery protruding downward to form a chime shape, or may have a curved surface that is recessed further toward the outside world at the center or periphery of the bottom. Alternatively, the liquid container body 30 may have a bottom periphery protruding downward to form a chime shape, with the bottom surface inclined to fit into the chime shape, and the bottom end 19 of the dip nozzle 10 may face the bottom at the bottom of the incline and may be in contact with or have a gap with the bottom (all not shown).

[0041] In the liquid container body 30, for example, the dip nozzle 10 has a narrow-diameter tube section 14 extending from an upper neck tube section 13 via a taper 18.

[0042] The dip nozzle 10 is inserted vertically into the liquid container body 30. The dip nozzle 10 is not limited to a lower end 19 or a position as long as the liquid 50 can be discharged and / or flowed in, but for example, the dip nozzle 10 is inserted vertically between the curved surface 33 on the inner surface of the liquid container body 30 and the lower end 19 of the dip nozzle 10 with some predetermined distance between the bottom 32.

[0043] The mouth 39 of the liquid container body 30 is hooked to a hook portion, such as a flange 11, of the upper end side thick-diameter tube portion 12 of the tubular dip nozzle 10, and / or the neck 38 of the liquid container body 30 is hooked to a hook portion, such as a male screw 15, of the upper end side thick-diameter tube portion 12 of the dip nozzle 10 by screwing into a female screw 36 inside the neck 38.

[0044] The pressurizing hole 17 is provided horizontally through the upper neck tube portion 13 which is connected to the large diameter tube portion 12 at the upper end of the dip nozzle 10 and has the same diameter or a reduced diameter, and is exposed to the inner space of the liquid container body 30.

[0045] The liquid container body 30 has a removable lid 20 that hermetically contains a liquid 50 at its mouth 39 and / or neck 38 .

[0046] The liquid container body 30 has a male screw 38' on the outer periphery of the neck 38, which screws into the female screw 21 on the inside of the lid 20. The female screw 21 of the lid 20 and the male screw 38' of the neck 38 of the liquid container body 30 are threaded so that the lid 20 rotates in a forward direction (usually clockwise for fastening and counterclockwise for loosening). In contrast, the male screw 15 of the dip nozzle 10 and the female screw 36 inside the neck 38 of the liquid container body 30 are threaded so that they rotate in opposite directions (usually counterclockwise for fastening and clockwise for loosening).

[0047] The lid 20 is provided with a packing 22 on the inside of the top surface. Preferably, the lid 20 is provided with a cylindrical plug portion that fits into and closes the upper end side large diameter tube portion 12 toward the dip nozzle 10, and the packing 22 is provided on the outer periphery near the lower end of the plug portion to prevent liquid from leaking between the upper end side large diameter tube portion 12 and the plug portion.

[0048] The liquid container body 30 has a groove 31 which is continuous and somewhat narrowed on the lower periphery. Instead of the continuous groove 31, the liquid container body 30 may have intermittent grooves.

[0049] The liquid container body 30 may have a recessed handle 34 recessed into the barrel portion 30'.

[0050] Top surface 32' of liquid container body 30 may be slightly raised toward the center. Mouth 39 and neck 38 are provided in the center of top surface 32', and inverted L-shaped handle protrusions are provided to sandwich them, and handle 37 is rotatably attached to the handle protrusions to make it foldable.

[0051] The liquid container body 30 may have a recessed handle 34 recessed in the barrel 30' instead of the handle 37 or in addition to the handle 37.

[0052] Pedestal 40 on which liquid container body 30 is placed has claws 41 near its upper end that engage with grooves 31 in liquid container body 30. Pedestal 40 may be cylindrical with no bottom or top. Pedestal 40 allows liquid container 100 to stand stably on its own. The inner tube 42 and the outer tube forming the outer periphery of the base 40 may be connected by a spacer wall 43, or may be further connected at the bottom surface, from which a ring-shaped bottom protrusion 44 may protrude. As a result, the inside of the inner tube 42 does not form a bottom surface, so that another liquid container body 30 and base 40 can be placed on it and stacked. The handle 37 and the inverted L-shaped handle protrusion, as well as the mouth portion 39 and neck portion 38, are arranged to fit within the inner tube 42 so as to be stackable.

[0053] The liquid container 100 is sealed so that the liquid 50 contained in the liquid container body 30 is not leaked by screwing the lid 20 onto the liquid container body 30 with the dip nozzle 10 inserted therein.

[0054] As a result, the liquid container 100 using the dip nozzle 10 can stably store liquids such as valuable and expensive high-purity industrial liquid medicines, high-purity medical liquid medicines, and food ingredient liquids for long periods of time without coming into contact with the outside world and without leakage during transportation or storage.

[0055] As shown in FIG. 3, the liquid container 100 may have a detachable connector 60 for discharging and delivering the liquid 50, which is replaceable with the lid 20.

[0056] The connector 60 is, for example, inserted into the large-diameter tube portion 12 at the upper end of the dip nozzle 10 in place of the lid 20 that covers the neck 39 and mouth 39 of the liquid container body 30 together with the dip nozzle 10, so as to be airtight, and has a vibration-preventing gasket 65 and an airtightness-maintaining gasket 63.

[0057] Alternatively, the connector 60 may have a female screw similar to the lid 20, and may have a thread so that the male screw can be screwed into the male screw 15 on the outer periphery of the neck 38 of the liquid container body 30 (not shown).

[0058] As shown in FIG. 3, the connector 60 holds an inner liquid-delivery tube 62 that is inserted into the upper neck canal portion 13 of the dip nozzle 10 and engages with the taper 18 (see FIG. 1) liquid-tightly and airtightly, and an outer pressurizing tube 64 that surrounds the inner liquid-delivery tube 62 and applies pressure to the pressurizing hole 17 while airtightly sealing the mouth portion 39 and / or neck portion 38 (see FIG. 1), which are the openings of the upper neck canal portion 13.

[0059] The pressurized outer tube 64 of the connector 60 has a wider diameter at the portion that protrudes from the mouth 39 and / or neck 38 than at the portion that fits into the mouth 39 and / or neck 38, and while the upper end is closed, it is completely airtight with a gasket 68 on the outer periphery of the liquid delivery inner tube 62.

[0060] The connector 60 has a gasket 61 that is attached to the outer periphery of the inner liquid delivery tube 62 near the tip and that makes the dip nozzle 10 liquid-tight between the taper 18 and the outer periphery of the inner liquid delivery tube 62, and a gasket 65 that makes the dip nozzle 10 airtight at the base side where the pressurized outer tube 64 does not have a wide diameter and is contained within the mouth portion 39 and / or neck portion 38, and the pressurized outer tube 64 has a gasket 63 that makes the neck portion 38 of the liquid container body 30 and the pressurized outer tube 64 airtight.

[0061] The pressurized outer tube 64 is closed at the upper end along the liquid supply inner tube 62, and branches off midway to be connected to an air compressor or an inert gas cylinder 66 indicated by P, preferably a nitrogen gas cylinder or an argon gas cylinder. A pressure gauge and a safety valve, as well as a manual valve or an automatic valve (not shown) for adjusting the flow rate, are provided between the pressurized outer tube 64 and the air compressor or the inert gas cylinder 66.

[0062] Additionally, the pressurized outer tube 64 is connected to a relief valve 67 which serves as a safety valve to release excess pressure.

[0063] It is preferable that the liquid container 100 using the dip nozzle 10 is transported to the site without containing the liquid 50, and the liquid 50 is contained therein, discharged, and then delivered.

[0064] The liquid container 100 is manufactured as follows.

[0065] The dip nozzle 10 and the liquid container body 30 of the liquid container 100, as well as the lid 20 and the base 40, are preferably made of a resin that can be recycled, for example, polyolefins such as polyethylene and polypropylene, polyamide, polyvinyl alcohol, poly(ethylene-co-vinyl alcohol), polyester, polyphenylene oxide, etc. A single layer of wall may be formed by using one of these resins, or a multi-layered wall may be formed by using a plurality of these resins.

[0066] In particular, the dip nozzle 10 and the liquid container body 30 of the liquid container 100 are both made of a polymer (a) and a polymer (b) which are polyethylene or an ethylene-α-olefin copolymer, and have a weight average molecular weight of 200,000 or more and a density of 0.940 to 0.970 g / cm. 3 The polymer (a) having a melt index based on JIS K6760 of 0.09 g / 10 min or less accounts for 30 to 95% by weight of the total weight and substantially covers the outer surface, the polymer (a) having a weight average molecular weight of 30,000 or more and less than 200,000, and a density of 0.930 to 0.970 g / cm 3 Alternatively, the polymer (b) having a melt index of 0.1 to 1.0 g / 10 min based on the same JIS standard may account for 5 to 70% by weight and substantially cover the inner surface. In this case, the dip nozzle 10 and the liquid container body 30 can be obtained which are extremely unlikely to leach particulate impurities into the liquid in the liquid container body 30, have excellent chemical resistance, have sufficient mechanical strength, and can fully satisfy the latest strict international standards for transport containers for dangerous chemicals.

[0067] As another specific example, at least the inner surface of the dip nozzle 10 and the liquid container body 30 of the liquid container 100 has a density of 0.940 to 0.970 g / cm 3 The resin is made of polyethylene or ethylene-α-olefin copolymer, the contents of neutralizer, antioxidant and light stabilizer in the resin as determined by liquid chromatography are each 0.01% by weight or less based on the total weight of the resin, and the weight-average molecular weight of the resin as determined by gel permeation chromatography is 12-26×10 4 The molecular weight of the resin is 1×10 3 The following polymer may be less than 2.5% by weight based on the total weight of the resin. Here, the α-olefin may be at least one selected from propylene, butene-1, 4-methyl-pentene-1, hexene-1, and octene-1. In this case, the dip nozzle 10 and the liquid container body 30 can be made to have excellent mechanical strength, easy handling, and extremely little leaching of impure particles into the solvent stored. In addition, even if the liquid container body 30 contains liquids such as methyl alcohol, ethyl alcohol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, acetone, ethyl acetate, toluene, dimethylformamide, ethylene glycol acetate, methoxypropyl acetate, butyl cellosolve, and high-purity solvents used for medical purposes such as sterilization, disinfection, and pharmaceutical raw materials, such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, the quality standards set forth in the Japanese Pharmacopoeia can be fully met.

[0068] As yet another specific example, the dip nozzle 10 and the liquid container body 30 of the liquid container 100 have a weight average molecular weight of 12 to 26×10 as measured by gel permeation chromatography. 4 So, 1×10 3 Molecular weight of less than 5% by weight, density 0.940-0.970g / cm 3a resin of polyethylene or ethylene-α-olefin copolymer, a neutralizing agent, an antioxidant, and a light-resistant stabilizer each of which is 0.01% by weight or less as determined by liquid chromatography, 0.01% by weight to 5% by weight of at least one light-shielding pigment selected from inorganic pigments such as titanium oxide, carbon black, and red iron oxide, phthalocyanine-based, quinacridone-based, and azo-based organic pigments, and a polymer having a number-average molecular weight of 2×10 3 The liquid container body 30 may be molded from a resin composition containing less than 5% by weight of the above-mentioned olefin polymer dispersant. In this case, the dip nozzle 10 and the liquid container body 30 can be made to have excellent mechanical strength, be easy to handle, have extremely little leaching of impure particles into the stored chemical, and prevent the contents from being altered by light. For this reason, the dip nozzle 10 and the liquid container body 30 can be widely used for liquids such as semiconductor chemicals and the above-mentioned medical solvents.

[0069] In another specific example, the dip nozzle 10 and the liquid container body 30 of the liquid container 100 are blow-molded containers having an inner layer made of a high-purity resin containing at least one selected from the group consisting of polymers of olefins such as ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1, or octene-1, and copolymers of ethylene and other olefins, and each of which contains a neutralizing agent, an antioxidant, and a light resistance stabilizer at a maximum of 0.01% by weight, an intermediate layer made of a solvent barrier resin containing poly(ethylene-co-vinyl alcohol), and an outer layer made of a resin composition containing a light-shielding substance, and the minimum absorbance of all layers of the container at a wavelength of 400 nm or less measured by a spectrophotometer is 2.0 or more, and the absorption coefficient at a wavelength of 400 nm obtained by dividing the absorbance of all layers of the container by the thickness of the all layers is 1.5 mm. -1 The absorption coefficient at a wavelength of 600 nm is 1.5 mm. -1 In this case, the resin composition of the outer layer may have a number average molecular weight of 2×10 or less. 3The above-mentioned pigment dispersant made of at least one olefin polymer selected from polyethylene and polypropylene may be contained at less than 5% by weight, and at least one light-shielding pigment selected from inorganic pigments and organic pigments may be contained at 0.01 to 5% by weight, and the resin composition of the outer layer may contain less than 2.5% by weight of an ultraviolet absorbing agent. In this case, the dip nozzle 10 and the liquid container body 30 can be made to be free of leaching of fine particles and metal ions during storage and transportation, capable of maintaining the quality of the high-purity chemical liquid, and furthermore, to be resistant to breakage and lightweight.

[0070] The liquid container 100, the liquid container body 30 and the dip nozzle 10 can be manufactured by known blow molding such as direct blow molding, injection blow molding, multi-layer extrusion blow molding, and stretch blow molding, or injection molding. If necessary, the lid 20 and the base 40 can be manufactured in the same manner. If necessary, the connector 60 can also be manufactured in the same manner.

[0071] 1 and 2, liquid container 100 is used sealed with lid 20. At this time, it may or may not be filled with liquid 50.

[0072] To discharge and send the liquid 50 in the liquid container body 30 from the liquid container 100, the lid 20 is replaced with the connector 60 as shown in Figure 3, and inert gas is flowed from the inert gas cylinder 66 through the pressurized outer tube 64 to the liquid container body 30, and the pressure of the gas causes the liquid 50 to be discharged from the liquid container body 30 through the dip nozzle 10 and the liquid sending inner tube 62, and the liquid is sent to the desired process. EXAMPLES

[0073] Examples of the present invention will be described in detail below, but the scope of the present invention is not limited to these examples.

[0074] (Production Example 1) The tube has an MFR of 0.2g / 10min and a density of 0.951g / cm3 The plug part, which has horizontal holes for pressurization, was then extruded into a shape shown in Fig. 1. The plug part had a MFR of 0.2 g / 10 min and a density of 0.951 g / cm. 3 The nozzle was manufactured by injection molding using high density polyethylene. The tube and plug were heat-sealed, and an O-ring was attached to produce the dip nozzle 10.

[0075] (Production Example 2) MFR is 0.4g / 10min, density is 0.956g / cm 3 Using high density polyethylene, a liquid container body 30 and a lid 20 having a capacity of 20 L as shown in Fig. 1 were manufactured by blow molding. The dip nozzle 10 manufactured in the actual manufacturing example 1 was attached to the liquid container body 30, and the lid 20 was placed on top to obtain a liquid container 100.

[0076] (Production Example 3) Lid 20 was removed from liquid container 100 obtained in Production Example 2 and replaced with connector 60 shown in FIG. 3, thereby obtaining liquid container 100 with a connector.

[0077] (Example 1) The obtained dip nozzle 10 was used to fill the liquid 50, and the liquid container 100 was then sealed with a lid 20, and the liquid 50 was stored and transported using the liquid container 100. Using the obtained dip nozzle 10, the liquid 50 was filled at the time of use, and then the liquid 50 was discharged and delivered using the liquid container 100 equipped with the connector 60, so that the liquid 50 was provided to the next step. After the discharge and delivery of the liquid 50 is completed, the connector 60 is removed and replaced with the lid 20 as necessary. At this time, the liquid 50 does not gush out from the pressurizing hole 17.

[0078] Comparative Example 1 A liquid container 100 with a connector was obtained in the same manner as in Manufacturing Examples 1 to 3, except that instead of the dip nozzle 10 obtained in Manufacturing Example 1, the pressurization hole 17 was facing downward, and then used in the same manner as in Usage Example 1.When the connector 60 was removed, in cases where the internal pressure had not been sufficiently released, liquid 50 was occasionally found to spray out of the pressurization hole, not only resulting in waste but also contaminating the surrounding area. [Industrial Applicability]

[0079] The dip nozzle of the present invention and a liquid container using the same can be used for liquid delivery in any field where high quality liquid is used, including industrial manufacturing, pharmaceuticals, and food. [Explanation of symbols]

[0080] 10 is a dip nozzle, 11 is a flange, 12 is a large diameter tube portion at the upper end, 13 is an upper neck tube portion, 14 is a small diameter tube portion, 15 is a male screw, 16 is a packing, 17 is a pressurizing hole, 18 is a taper, 19 is a lower end, 20 is a lid, 21 is a female screw, 22 is a packing, 30 is a liquid container body, 30' is a body portion, 31 is a groove, 32 is a bottom, 32' is a top surface, 33 is a curved surface, 34 is a recessed handle, 35 is a narrowed portion, 36 is a female screw, 37 is a handle, 38 is a neck, 38' is a male screw, 39 is a mouth, 40 is a base, 41 is a claw, 42 is an inner tube, 43 is a spacer wall, 44 is a bottom protrusion, 50 is liquid, 50' is residual liquid, 60 is a connector, 62 is a liquid delivery inner tube, 63 is an airtight gasket, 64 is a pressurized outer tube, 65 is a vibration prevention gasket, 66 is an inert gas cylinder, 67 is a relief valve, 68 is gasket, and 100 is a liquid container.

Claims

1. A tubular dip nozzle is inserted vertically into a liquid container body of a sealable liquid container having a curved surface and / or an inclined surface recessed toward the outside at the bottom, in order to deliver liquid contained in the liquid container body, the dip nozzle comprising: the container has an upper end side large diameter tube portion having a hook portion for hooking onto the inside of the mouth and / or neck of the liquid container body, an upper neck tube portion connected to the upper end side large diameter tube portion and having the same diameter or a reduced diameter, and a small diameter tube portion connected to the upper neck tube portion, tapered and reduced in diameter, and extending to the lower end, A dip nozzle characterized in that a pressurizing hole is formed in the upper neck portion and extends horizontally.

2. The upper end side of the large diameter tube portion has a flange portion as the hook portion on the outer periphery thereof, and / or 2. The dip nozzle according to claim 1, wherein the engaging portion is a male screw that screws into the inside of the mouth portion and / or the neck portion.

3. 2. The dip nozzle according to claim 1, wherein the male screw is a forward male screw that is screwed into the mouth portion and / or the neck portion with a lid and a reverse screw or a forward screw.

4. A liquid container having a curved surface and / or an inclined surface recessed toward the outside at the bottom, capable of sealingly storing a liquid and discharging and delivering the liquid, a tubular dip nozzle which is inserted in a direction perpendicular to the curved surface on the inner surface of the liquid container body of the liquid container and / or toward the bottom of the inclined surface, the tubular dip nozzle having an upper end side large diameter tube portion having a hook portion for hooking onto the inside of the mouth and / or neck of the liquid container body, an upper neck tube portion connected to the upper end side large diameter tube portion and having the same diameter or a reduced diameter, and a small diameter tube portion connected to the upper neck tube portion and reduced in diameter via a taper and extending to the lower end, the upper neck tube portion having a pressurizing hole penetrating therethrough in a horizontal direction; a removable lid for hermetically containing the liquid at the mouth and / or neck; A liquid container comprising:

5. a cylindrical base having a claw at its upper end which engages with a groove provided continuously or intermittently on the outer periphery of the lower part of the liquid container body; 5. The liquid container according to claim 4, further comprising:

6. a handle on a shoulder of the liquid container body that straddles the mouth and / or the neck; and / or 5. The liquid container according to claim 4, further comprising a recessed handle recessed in the barrel of the liquid container body.

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