WO2016170684A1 - 残量低減部材 - Google Patents
残量低減部材 Download PDFInfo
- Publication number
- WO2016170684A1 WO2016170684A1 PCT/JP2015/062557 JP2015062557W WO2016170684A1 WO 2016170684 A1 WO2016170684 A1 WO 2016170684A1 JP 2015062557 W JP2015062557 W JP 2015062557W WO 2016170684 A1 WO2016170684 A1 WO 2016170684A1
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- WO
- WIPO (PCT)
- Prior art keywords
- remaining amount
- reducing member
- contents
- amount reducing
- longitudinal direction
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/60—Contents and propellant separated
- B65D83/62—Contents and propellant separated by membrane, bag, or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/32—Dip-tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/32—Containers adapted to be temporarily deformed by external pressure to expel contents
- B65D1/323—Containers adapted to be temporarily deformed by external pressure to expel contents the container comprising internally a dip tube through which the contents pass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D83/00—Containers or packages with special means for dispensing contents
- B65D83/14—Containers or packages with special means for dispensing contents for delivery of liquid or semi-liquid contents by internal gaseous pressure, i.e. aerosol containers comprising propellant for a product delivered by a propellant
- B65D83/68—Dispensing two or more contents, e.g. sequential dispensing or simultaneous dispensing of two or more products without mixing them
Definitions
- the present invention relates to a remaining amount reducing member that is mounted inside a flexible inner bag disposed inside an aerosol container and reduces the final remaining amount of the discharged contents.
- a flexible interior bag is arranged and integrated inside the outer can, and the contents to be discharged are stored in the interior bag, and a flexible fluid is filled between the interior bag and the outer can.
- an aerosol container configured to press a sex-type interior bag and discharge the contents contained in the interior bag to the outside from an inflow port (see, for example, Patent Document 1).
- any pressurized fluid can be used, and the pressurized fluid is not discharged together with the contents. , The contents can be discharged efficiently.
- an inner bag 502 for containing the contents F is provided inside an outer can 501 of the aerosol container 500, and a spout 504 having a stem 505 at the top and an inflow port 503 opened therein is provided in the inner bag 502. It has been.
- a space between the outer can 501 and the inner bag 502 is filled with a pressurized fluid G such as nitrogen gas, and when the stem 505 is pressed, the contents stored in the inner bag 502 flow into the inlet 503. Then, the stem 505 is discharged to the outside.
- a pressurized fluid G such as nitrogen gas
- a dip tube 511 as a remaining amount reducing member is inserted into the inflow port 503, and at that time, the inner periphery of the inflow port 503 is formed so as to ensure a flow path for the contents F between the dip tube 511.
- the contents F are guided in the direction of the stem 505 from both the vicinity of the inlet 503 and the vicinity of the tip of the dip tube 511, and are discharged to the outside.
- an aerosol container configured such that a plurality of flexible interior bags are arranged in one outer can, and different types of contents are contained without being mixed and simultaneously discharged.
- an aerosol container there is no need to connect a plurality of outer cans or to give a special structure to the inside, and the mixing of the contents until discharged is completely prevented, and the pressurized fluid
- One outer can can be filled once, and the manufacture is facilitated (see, for example, Patent Document 2).
- JP 2004-75099 A (all pages, all figures) JP-A-2005-231644 (all pages, all figures) JP 11-105893 A (all pages, all figures) Japanese Patent No. 5279970 (all pages, all figures)
- the contents remaining in the space closed around by the remaining amount reducing member cannot be guided to the inflow port, Rather, there is a problem in that the remaining amount increases due to an increase in the space that is blocked by the protrusions and the lightening portions provided on the known remaining amount reducing member. Further, even if the pressure of the pressurized fluid is increased, the closing force of the space closed is also increased, which does not contribute to the reduction of the remaining content.
- the inventors have a solid rod-like body as shown in FIG. 15, and the contents can flow into the inlet of the interior bag.
- the remaining amount reducing member 610 is proposed in which a superposition preventing portion 640 formed so as to have a different cross-sectional shape from a portion where the guide groove 631 is formed at an intermediate position in the longitudinal direction of the guide portion 630 (See Patent Document 4).
- the guide portion 630 in which a plurality of guide grooves 631 are formed in the longitudinal direction of the outer periphery allows the content to flow into the inlet. Therefore, it is possible to prevent a space closed by the pressurized fluid over the entire length of the remaining amount reducing member 610 and to reduce the final remaining amount of the discharged contents. be able to.
- the inner bag itself is deformed to the inside of the guide groove 631 by pressure at the final stage of the discharge of the contents, the content remaining in the guide groove 631 is very small and remains in the remaining amount reducing member 610 itself. The content to be done can be extremely reduced.
- the flow path R through which the contents pass by the remaining amount reducing member 610 known in Patent Document 4 is formed with a plurality of guide grooves 631 when the inner bag is stuck tightly, as shown in FIG.
- the formed portion is formed by four small triangular spaces
- the superposition preventing unit 640 is formed by four smaller triangular spaces (areas shown in black).
- the aerosol container comprised so that several flexible interior bags may be arrange
- the present invention solves the problem of the known remaining amount reducing member as described above, and prevents the generation of a space that is blocked by the pressurized fluid, and the final remaining amount of the discharged content.
- An object of the present invention is to provide a remaining amount reducing member that can reduce the amount of discharge, stabilize the discharge amount of the content per unit time, and discharge the content smoothly to the end.
- the remaining amount reducing member according to the present invention is a remaining amount reducing member that is mounted inside a flexible interior bag disposed inside an aerosol container and reduces the final remaining amount of the content to be discharged.
- a mounting portion that allows the contents to flow into the inflow port of the interior bag; and a guide portion that allows the flow of the contents in the longitudinal direction.
- the guide portion includes a plurality of grooved blocks in the longitudinal direction. The grooved blocks each have one longitudinal guide groove, and the adjacent grooved blocks are connected to each other so that the opening of the guide groove faces in the opposite direction of 180 °.
- An aerosol container according to the present invention is an aerosol container that accommodates a plurality of flexible interior bags, and the aforementioned remaining amount reducing member is attached to the inside of the plurality of interior bags. Is a solution.
- the guide portion includes a plurality of grooved blocks in the longitudinal direction, and each of the grooved blocks has one longitudinal guide groove. Since the guide groove forms a guide space that is continuous in the longitudinal direction, the guide groove opens to the outer peripheral side in all the portions in the longitudinal direction of the outer periphery, even when the remaining amount of contents is reduced, and Since the guide space that is continuous in the longitudinal direction functions as a passage for allowing the contents to flow toward the inflow port, it is possible to prevent the occurrence of a closed space around the entire length of the remaining amount reducing member, and the discharged contents The final remaining amount of objects can be reduced.
- a guide space that is continuous in the longitudinal direction can be secured with a desired cross-sectional area, a sufficient flow rate can be secured to the end without depending on the state and material of the flexible inner bag, so that per unit time
- the amount of contents discharged can be stabilized, and when a plurality of flexible interior bags are arranged in one outer can, a desired mixing ratio can be stably obtained.
- adjacent grooved blocks are connected so that the opening of the guide groove faces 180 ° in the opposite direction, so that even when manufacturing with a mold such as injection molding, it can be created with a split mold. Since the shape is simple, the manufacturing is easy and the cost is low.
- the grooved block is formed in an outer peripheral shape having an arc surface exceeding 180 ° and a groove forming surface, and the guide groove is formed in the arc center direction from the groove forming surface, Moreover, by having a depth exceeding the center of the arc, it is possible to ensure a large opening of the guide groove and a wide guide space with a large cross-sectional area while securing the coupling strength with the adjacent grooved block, and further discharging. The final remaining amount of the contents can be reduced, and the discharge amount of the contents can be stabilized by lowering the flow path resistance.
- the outer surface groove extending in the longitudinal direction on the circular arc surface is provided at a position that does not overlap the circular arc surface of the adjacent grooved block.
- a content guide path is formed in the longitudinal direction on the outer surface side, and the content smoothly flows to the inflow port, so that the discharge amount of the content can be stabilized.
- the connection neck is provided between the mounting portion and the grooved block, and the connection neck is on the guide groove side of the adjacent grooved block and on the opposite side of 180 °.
- Each has an open part that is open and communicates with the guide space, so that the contents flowing from the guide space to the inlet of the interior bag can be distributed to both sides of the mounting part. Smoothly flows to the inflow port, and the discharge amount of the contents can be stabilized.
- the resin when the grooved blocks are connected in an odd number, the resin is injected from the grooved block portion located at the center in the longitudinal direction when molding with resin or the like. Therefore, it becomes possible to uniformly flow the resin into the mold toward both ends in the longitudinal direction, and a highly accurate and uniform remaining amount reducing member can be obtained.
- the configuration described in claim 6 it is possible to smoothly mount the mounting portion on the inflow port, and it is possible to prevent the inner bag from being damaged by the corner portion of the end surface of the mounting portion.
- any end portion of the remaining amount reducing member can be attached to the inflow port, it is not necessary to align the longitudinal direction at the time of manufacture, and the attachment is facilitated.
- the aerosol container according to claim 8 the discharge amount per unit time from each of the interior bags is stabilized by mounting the aforementioned remaining amount reducing member inside the plurality of interior bags. It becomes possible to stably obtain a desired mixing ratio.
- FIG. 2A The front view of the residual amount reduction member of 1st Embodiment of this invention.
- the side view of FIG. 2A is a cross-sectional view
- FIG. 2B is a partially enlarged cross-sectional view
- FIG. 2C is a cross-sectional view along A-A ′.
- FIG. 8 is a table showing the conditions and results of the injection experiment shown in FIGS.
- the side view of FIG. FIG. 10A is a cross-sectional view
- FIG. 10B is a cross-sectional view along B-B ′.
- the remaining amount reducing member of the present invention is a remaining amount reducing member that is mounted inside a flexible interior bag disposed inside an aerosol container and reduces the final remaining amount of the content to be discharged.
- a mounting portion for allowing the contents to flow into the inflow port of the bag, and a guiding portion for allowing the flow of the contents in the longitudinal direction, the guiding portion is formed by connecting a plurality of grooved blocks in the longitudinal direction;
- Each grooved block has one longitudinal guide groove, and adjacent grooved blocks are connected so that the opening of each guide groove faces 180 ° oppositely, and the guide groove is continuous in the longitudinal direction.
- the remaining amount reducing member 110 according to the first embodiment of the present invention is inserted in place of the known dip tube 511 into the inlet 103 of the aerosol container 100 similar to the known aerosol container 500 described above. That is, as shown in FIG. 1, an inner bag 102 for containing the contents F is provided inside an outer can 101 of the aerosol container 100, and the inner bag 102 has a stem 105 at the top and an inlet 103 is opened inside. A spout 104 is provided. The space between the outer can 101 and the inner bag 102 of the aerosol container 100 is filled with a pressurized fluid G such as nitrogen gas, and when the stem 105 is pressed, the contents stored in the inner bag 102 flow.
- a pressurized fluid G such as nitrogen gas
- the remaining amount reducing member 110 which is 1st Embodiment of this invention provided with the mounting part 120 and the guidance
- the inner periphery of the inflow port 103 is formed so as to secure a flow path of the contents F between the mounting portion 120 of the remaining amount reducing member 110.
- the remaining amount reducing member 110 includes a mounting portion 120 that can be mounted so that the contents F can flow into the inflow port 103 of the interior bag 102 at both ends, and a longitudinal direction.
- a guiding portion 130 that allows the flow of the contents F in the direction is provided, and a connecting neck portion 121 is formed between the mounting portion 120 and the guiding portion 130.
- the guide portion 130 is formed by connecting a plurality of grooved blocks 132 in the longitudinal direction, and each of the grooved blocks 132 has one longitudinal guide groove 131.
- Each grooved block 132 is formed in an outer peripheral shape having an arc surface 133 and a groove forming surface 134 exceeding 180 °, and the guide groove 131 is formed in the arc center direction from the groove forming surface 134, and the arc center It has a depth exceeding. Adjacent grooved blocks 132 are connected so that the opening of the guide groove 131 faces in the opposite direction by 180 °, thereby forming a guide space 135 in which the guide groove 131 is continuous in the longitudinal direction.
- connection neck 121 has an opening 122 that opens on the guide groove 131 side of the adjacent grooved block 132 and on the opposite side of 180 °, and the opening 122 communicates with the guide space 135.
- the mounting portions 120 are provided at both ends in the longitudinal direction of the guide portion 130, and the end surfaces 123 of the mounting portion 120 are formed in a smooth convex shape.
- 17 grooved blocks 132 are connected in the longitudinal direction, and as shown in FIG. 4, the groove is formed by a mold at a position corresponding to the bottom of the guide groove 131 of the middle grooved block 132 c. At this time, a gate 137 for injecting resin is provided.
- the guide groove 131 that opens in the direction and the guide groove 131 forms a guide space 135 that communicates in the longitudinal direction
- the flow path in the longitudinal direction of the contents F is secured to the end, and the mounting portion 120 and It passes through the connection neck 121 provided between the guide portions 130 and is reliably guided to the inflow port 103. Therefore, since the contents F can flow toward the inflow port 103 from anywhere over the entire length of the remaining amount reducing member 110, it is possible to prevent the space closed by the pressurized fluid from being generated and discharged. The final remaining amount of the content F can be reduced.
- the guide groove 131 as a flow path has a large cross section R and the guide groove 131. Since a guide space 135 serving as a flow path in the longitudinal direction is always secured in the back of the, the discharge amount of the content per unit time can be stabilized without increasing the flow path resistance.
- the number of grooved blocks, the size of each part, the angle, and the like may be set as appropriate according to the shape and material of the interior bag 102, the viscosity of the contents F, and the like.
- the width, depth, shape, and the like of the guide groove 131 may be appropriately set according to the shape and material of the interior bag 102, the viscosity of the contents F, and the like.
- the remaining amount reducing member 110 (hereinafter referred to as “the present invention”) according to the first embodiment of the present invention, the above-described remaining amount reducing member 610 (hereinafter referred to as “the conventional invention”), and the dip tube 511 described above are illustrated.
- one agent and two agents were filled with the same viscosity and the same amount, and the internal pressure in the aerosol can was set to 0.7 MPa (at 25 ° C.).
- the initial injection amount is injected almost uniformly for both the present invention, the conventional invention, and the dip tube, as shown in the table of FIG. 8.
- the remaining amount is reduced by continuing the injection while maintaining the 2 agent / 1 agent ratio in the vicinity of 1, and the final remaining amount is 1
- the amount of both agents was 0.6 g.
- the final remaining amount is 1.6 g for one agent and 0.3 g for two agents, but as shown in FIG. Until the time point when the injection of one agent is almost finished, the ratio of the two agents / 1 agent continues to decrease to a maximum of 0.7, and thereafter, the injection of only two agents is almost completed. Further, in the dip tube, as shown in FIG. 7, the remaining amount is reduced by continuing the injection while maintaining the two agent / 1 agent ratio in the vicinity of 1, but the final remaining amount is 4 for one agent. .6g, 2 parts 1.0g, very much remaining.
- the remaining amount reducing member of the present invention has the final remaining amount as small as that of the remaining amount reducing member of the conventional invention, and the injection ratio of two agents / one agent is the same as that of the dip tube. Equally uniform, reducing the final remaining amount of discharged content, stabilizing the discharged amount of content per unit time, and discharging the content smoothly to the end .
- the remaining amount reducing member 210 according to the second embodiment of the present invention has two arc surfaces 233 in addition to the configuration of the remaining amount reducing member 110 according to the first embodiment described above.
- the outer surface groove 238 extending in the longitudinal direction of the book is provided at a position that does not overlap the arc surface 233 of the adjacent grooved block 232 in the longitudinal direction (the same configuration as in the first embodiment corresponds to the No. 200 generation). It is shown with a reference numeral, and the description of the configuration is omitted.)
- the outer surface groove 238 is provided at two locations on the arc surface 233 of each grooved block 232 so as to extend in the longitudinal direction.
- the space outside the groove forming surface 234 of each grooved block 232 and the outer groove 238 are alternately arranged in the longitudinal direction and continuously linearly, and the central guide groove 231 is continuously formed.
- a guide path on the outer surface side similar to the conventional invention shown in the above experimental example is formed, and the contents smoothly flow to the inflow port, and the discharge amount of the contents is stabilized. Is possible.
- the guide groove 231 is formed in a shape different from that of the guide groove 131 of the first embodiment.
- the shape may be set appropriately.
- the remaining amount reducing member of the present invention is used for each inner bag of an aerosol container having one general inner bag and two aerosol bags having two inner bags for storing different contents. It may be used for an aerosol container having an interior bag, and it is possible to design a specific form using the technical features of the present invention in accordance with various usage forms, and to the outer shape and form of the aerosol container In addition, appropriate modifications are possible. In addition to aerosol containers, it is used for containers configured on the premise that the contents are pressed from the outside of the flexible container toward the inlet by human hands, and containers having other pressing means. May be.
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Abstract
Description
このようなエアゾール容器では、内容物が加圧流体と触れることがないため、任意の加圧流体を使用することが可能であり、また、加圧流体が内容物とともに吐出されることがないため、効率的に内容物を吐出することができる。
この最終残存量を低減するために、残量低減部材としてディップチューブを取り付け、内容物を流入口近傍とディップチューブの先端の両方から外部に吐出できるようにしたものが公知である。
この例では、エアゾール容器500の外缶501の内部に内容物Fを収容する内装袋502を設け、内装袋502にはステム505を上部に有し内部に流入口503が開口したスパウト504が設けられている。
外缶501と内装袋502との間の空間には、窒素ガス等の加圧流体Gが充填されており、ステム505を押圧すると、内装袋502の収容された内容物が流入口503から流入してステム505の先端から外部に吐出される。
そして、残量低減部材としてのディップチューブ511が流入口503に挿入され、その際、流入口503の内周はディップチューブ511との間に内容物Fの流路が確保されるように形成されており、矢印で示すように、流入口503近傍と、ディップチューブ511の先端近傍の両方から内容物Fがステム505方向に誘導されて外部に吐出される。
このようなエアゾール容器では、複数の外缶を連結したり、内部に特殊な構造を施したりする必要がなく、吐出されるまでの内容物の混合が完全に防止され、また、加圧流体も1つの外缶に1度充填すればよく製造も容易となる(例えば特許文献2等参照。)。
しかしながら、特許文献3に記載されたような公知の残量低減部材は、人の手によって可撓性の容器の外部から内容物を流入口に向かうように押圧することを前提に構成されている。
したがって、加圧流体によって全体が均等に押圧されるエアゾール容器の内装袋においては、これらの残量低減部材によって周囲を閉塞される空間に残存する内容物を流入口に誘導することはできず、むしろ、公知の残量低減部材に設けられている突起部や肉抜き部によって閉塞される空間が増加する要因となり、残存量が増加してしまうという問題があった。
また、加圧流体の圧力を上げても、周囲を閉塞される空間の閉塞力も上がることとなり、内容物の残存量の減少には寄与しなかった。
また、内容物の吐出の最終段階で、内装袋自体が圧力によって誘導溝631内まで変形するため、誘導溝631内に残留する内容物も非常に少なく、残量低減部材610そのものの内部に残留する内容物を極めて少なくすることができる。
さらに、重畳防止部640により、2つの残量低減部材610が重なって分離しにくくなるのを防止することができるため、製造工程において複数の残量低減部材610をまとめて供給しても、1本ずつ容易に取り出すことができ装着作業が容易となる。
これらの流路Rは、内装袋がぴったり張り付いた際にも、最低限の空間が確保され最後まで流路Rが閉塞されることはないものの、流路抵抗は大きなものとなり、また、吐出中の内装袋の状態の変化により流路抵抗も大きく変化する可能性がある。
このことで、内容物は最後まで円滑に吐出されて残量は充分に低減できるものの、可撓性の内装袋の収容状態、材質、内容物の粘度等の諸条件によって単位時間あたりの内容物の吐出量を安定化できない可能性があった。
そして、図14(a)に示すように、1つの外缶に複数の可撓性の内装袋を配置し、異なる種類の内容物を混ざることなく収容して同時に吐出させるように構成したエアゾール容器に適用した際には、それぞれの内装袋からの単位時間あたりの吐出量が安定化できず、所望の混合比が安定して得られない可能性があった。
本発明に係るエアゾール容器は、複数の可撓性の内装袋を収容したエアゾール容器であって、複数の前記内装袋の内部に、前述の残量低減部材が装着されていることにより、前記課題を解決するものである。
また、長手方向に連続する誘導空間を所望の断面積で確保できることにより、可撓性の内装袋の状態や材質に依存せずに最後まで充分な流量を確保することができるため、単位時間あたりの内容物の吐出量を安定化することが可能となり、1つの外缶に複数の可撓性の内装袋を配置した場合、所望の混合比を安定して得ることが可能となる。
さらに、隣接する溝付ブロックは、それぞれ誘導溝の開口が180°反対方向を向くよう連接されていることにより、射出成形等の金型で製造する際でも、2つ割りの金型で作成可能で形状も単純であることから、製造が容易でコストも安価となる。
本請求項3に記載の構成によれば、円弧面に長手方向に延びる外面溝が、隣接する溝付ブロックの円弧面と重ならない位置に設けられていることにより、外面溝によって中心の誘導空間に加えて外面側にも長手方向に内容物の誘導経路が形成され、さらに内容物が流入口に円滑に流れ、内容物の吐出量を安定化することが可能となる。
本請求項4に記載の構成によれば、装着部と溝付ブロックとの間には、接続首部が設けられ、接続首部は隣接する溝付ブロックの誘導溝側、及び、その180°反対側にそれぞれ開口した開放部を有し、開放部が誘導空間と連通していることにより、誘導空間から内装袋の流入口に流れる内容物を、装着部の両側に振り分けることが可能となり、内容物が流入口に円滑に流れ、さらに内容物の吐出量を安定化することが可能となる。
本請求項6に記載の構成によれば、流入口への装着部の装着を円滑に行うことが可能となるとともに、装着部の端面の角部によって内装袋を傷つけることを防止できる。
本請求項7に記載の構成によれば、残量低減部材のいずれの端部でも流入口に装着することが可能となるため、製造時に長手方向の向きを揃える必要がなく装着が容易となる。
本請求項8に係るエアゾール容器によれば、複数の内装袋の内部に、前述の残量低減部材が装着されていることにより、それぞれの内装袋からの単位時間あたりの吐出量を安定化し、所望の混合比を安定して得ることが可能となる。
101、 501 ・・・ 外缶
102、 502 ・・・ 内装袋
103、 503 ・・・ 流入口
104、 504 ・・・ スパウト
105、 505 ・・・ ステム
110、210、 610 ・・・ 残量低減部材
511 ・・・ ディップチューブ(残量低減部材)
120、220、 620 ・・・ 装着部
121、221 ・・・ 接続首部
122、222 ・・・ 開放部
123、223 ・・・ 端面
130、230、 630 ・・・ 誘導部
131、231、 631 ・・・ 誘導溝
132、232 ・・・ 溝付ブロック
133、233 ・・・ 円弧面
134、234 ・・・ 溝形成面
135、235 ・・・ 誘導空間
136、236 ・・・ 連接面
137、237 ・・・ ゲート
238 ・・・ 外面溝
640 ・・・ 重畳防止部
F ・・・ 内容物
G ・・・ 加圧流体
R ・・・ 流路
すなわち、図1に示すように、エアゾール容器100の外缶101の内部に内容物Fを収容する内装袋102を設け、内装袋102にはステム105を上部に有し内部に流入口103が開口したスパウト104が設けられている。
エアゾール容器100の外缶101と内装袋102との間の空間には、窒素ガス等の加圧流体Gが充填されており、ステム105を押圧すると、内装袋102の収容された内容物が流入口103から流入してステム105の先端から外部に吐出されるように構成されている。
そして、内装袋102の流入口103に、装着部120と誘導部130とを備えた本発明の第1実施形態である残量低減部材110が挿入される。
その際、流入口103の内周は残量低減部材110の装着部120との間に内容物Fの流路が確保されるように形成されている。
誘導部130は、溝付ブロック132を長手方向に複数連ねてなり、前記溝付ブロック132には、それぞれ1つの長手方向の誘導溝131を有している。
それぞれの溝付ブロック132は、180°を越える円弧面133と溝形成面134とを有する外周形状に形成され、誘導溝131は、溝形成面134から円弧中心方向に形成され、かつ、円弧中心を越える深さを有している。
隣接する溝付ブロック132は、それぞれ誘導溝131の開口が180°反対方向を向くよう連接され、誘導溝131が長手方向に連続する誘導空間135を形成している。
装着部120は、誘導部130の長手方向両端に設けられており、装着部120の端面123が、滑らかな凸面状に形成されている。
本実施形態では、長手方向に17個の溝付ブロック132が連接されており、図4に示すように、ちょうど真ん中の溝付ブロック132cの誘導溝131の底部にあたる位置に、金型で成形する際に樹脂を注入するゲート137が設けられている。
各溝付ブロック132の中心線上の長手方向の長さLbは、4.2mmであり、隣接する溝付ブロック132との連接面136は、金型による成形を考慮して、開き角θ1=10°に設定されている。
また、誘導溝131の幅Lmは1.78mmであり、金型による成形を考慮して、開き角θ2=6°に設定されている。
また、接続首部121の長手方向の長さLkは、1.3mmである。
ステム105を押圧すると、内装袋102に収容された内容物Fは流入口103と残量低減部材110の装着部120との間に確保された流路を通過してステム105の先端から外部に吐出される。
内装袋102の収容された内容物Fの残量が減少してくると、内装袋102が残量低減部材110の誘導部130に接触することとなるが、すべての溝付ブロック132には外方に開口する誘導溝131が存在し、誘導溝131が長手方向に連通する誘導空間135を形成していることにより、内容物Fの長手方向の流路が最後まで確保され、装着部120と誘導部130の間に設けられた接続首部121を通過して、確実に流入口103に導かれる。
したがって、残量低減部材110の全長にわたって、どこからでも内容物Fを流入口103に向かって流動させることができるため、加圧流体により周囲を閉塞された空間が発生することを防止でき、吐出される内容物Fの最終残存量を減少させることができる。
なお、溝付ブロックの数、各部の寸法、角度等は、内装袋102の形状や材質、内容物Fの粘性等に応じて、適宜設定すれば良い。
また、誘導溝131の幅、深さ、形状等も、内装袋102の形状や材質、内容物Fの粘性等に応じて、適宜設定すれば良い。
図8の表に示すように、1剤、2剤ともに同一粘度で、同量充填し、エアゾール缶内の内圧を0.7MPa(at25℃)とした。
初期の噴射量は、本発明、従来発明、ディップチューブともに、図8の表に示すように、1剤、2剤ともほぼ均等に噴射される。
本発明では、図5に示すように、初期の噴射の後もほぼ均等に2剤/1剤比率を1近辺に維持したまま噴射を続けて残量を減らし、最終的な残量は、1剤、2剤とも0.6gであった。
また、ディップチューブでは、図7に示すように、ほぼ均等に2剤/1剤比率を1近辺に維持したまま噴射を続けて残量を減らすものの、最終的な残量が、1剤が4.6g、2剤が1.0gと、非常に残量が多くなる。
この実験結果からも明らかなように、本発明の残量低減部材では、最終残存量は従来発明の残量低減部材と同程度に少なく、かつ、噴射の2剤/1剤比率もディップチューブと同程度に均等になっており、吐出される内容物の最終残存量を低減するとともに、単位時間あたりの内容物の吐出量を安定化し、かつ、最後まで円滑に内容物を吐出することがわかる。
外面溝238は、図12(b)に示すように、各溝付ブロック232の円弧面233に2箇所、長手方向に延びるように設けられている。
このことで、各溝付ブロック232の溝形成面234の外側の空間と外面溝238とが長手方向で交互に配置されて直線的に連続し、中心の誘導溝231が連続して形成される誘導空間235に加えて、前述の実験例で示した従来発明と同様の外面側の誘導経路が形成され、さらに、内容物が流入口に円滑に流れ、内容物の吐出量を安定化することが可能となる。
なお、本実施形態では、誘導溝231が第1実施形態の誘導溝131とは異なる形状に形成されているが、内容液の粘度や内装袋の材質等に応じ、また、製造の容易性等を考慮して適宜の形状とすればよい。
また、エアゾール容器のみならず、人の手によって可撓性の容器の外部から内容物を流入口に向かうように押圧することを前提に構成された容器や、他の押圧手段を有する容器に使用されても良い。
Claims (8)
- エアゾール容器の内部に配置される可撓性の内装袋の内部に装着され、吐出される内容物の最終残存量を低減する残量低減部材であって、
前記内装袋の流入口に内容物が流入可能に装着される装着部と、長手方向に内容物の流動を許容する誘導部とを備え、
前記誘導部が、溝付ブロックを長手方向に複数連ねてなり、
前記溝付ブロックには、それぞれ1つの長手方向の誘導溝を有し、
隣接する前記溝付ブロックは、それぞれ前記誘導溝の開口が180°反対方向を向くよう連接され、
前記誘導溝が、長手方向に連続する誘導空間を形成していることを特徴とする残量低減部材。 - 前記溝付ブロックが、180°を越える円弧面と溝形成面とを有する外周形状に形成され、
前記誘導溝が、溝形成面から円弧中心方向に形成され、かつ、円弧中心を越える深さを有することを特徴とする請求項1に記載の残量低減部材。 - 前記円弧面には、長手方向に延びる少なくとも1つの外面溝が、隣接する溝付ブロックの円弧面と長手方向で重ならない位置に設けられていることを特徴とする請求項2に記載の残量低減部材。
- 前記装着部と前記溝付ブロックとの間には、接続首部が設けられ、
前記接続首部は、隣接する溝付ブロックの誘導溝側、及び、その180°反対側にそれぞれ開口した開放部を有し、
前記開放部が、前記誘導空間と連通していることを特徴とする請求項1乃至請求項3のいずれかに記載の残量低減部材。 - 前記溝付ブロックが、奇数個連接されていることを特徴とする請求項1乃至請求項4のいずれかに記載の残量低減部材。
- 前記装着部の端面が、滑らかな凸面状に形成されていることを特徴とする請求項1乃至請求項5のいずれかに記載の残量低減部材。
- 前記装着部が、前記誘導部の長手方向両端に設けられていることを特徴とする請求項1乃至請求項6のいずれかに記載の残量低減部材。
- 複数の可撓性の内装袋を収容したエアゾール容器であって、
複数の前記内装袋の内部に、請求項1乃至請求項7のいずれかに記載の残量低減部材が装着されていることを特徴とするエアゾール容器。
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