JP5504701B2 - Foam discharge container - Google Patents

Description

  The present invention relates to a foam discharge container that discharges a liquid in a container body in a foam shape by pressing a flexible container body.

  The foam discharge container that discharges the liquid in the container body in a foam form by pressing and deforming the flexible container body is also called a squeeze foamer container. Used when discharging.

  As one form of the foam discharge container, it comprises a container main body, a bag member provided in the container main body and a cap attached to the mouth portion thereof, and includes a porous member in the cap, and the container main body and the bag member There is a foam discharge container in which the space is a liquid chamber and the bag member is an air chamber. In this foaming container, the bag member is also crushed by pressing and crushing the container body, and the liquid in the liquid chamber is discharged in the form of bubbles by the air in the bag member (Patent Document 1).

Japanese Patent Application Laid-Open No. 51-125581

  However, according to the above-mentioned foam discharge container, there is a problem that the liquid cannot be discharged in the form of foam because the bag member is not crushed when the container body is crushed slowly.

  Therefore, the present invention provides a double container composed of a flexible outer container and a flexible inner container, and a foam discharge container equipped with a former cap. The purpose is to allow the vessel to deform and form bubbles.

  In order to achieve the above-mentioned object, the present invention attaches to a flexible outer container, a flexible inner container provided inside the outer container, and a mouth part of the outer container and a mouth part of the inner container. The former cap has a liquid chamber between the outer container and the inner container, and there is a gas-liquid mixing chamber in the former cap. By pressing the outer container in an inverted state, the liquid is discharged from the liquid chamber. A foam discharge container that forms bubbles by mixing liquid and air discharged from an inner container in a gas-liquid mixing chamber, wherein the outer container and the inner container are substantially in contact with each other in a non-pressed state of the outer container A discharge container is provided.

  According to the foam discharge container of the present invention, since the outer container and the inner container are substantially in contact with each other in the non-pressed state of the outer container, when the outer container is pressed and deformed, the pressing is slow. Even if it is made, the inner container is also deformed. Therefore, it is possible to reliably discharge bubbles.

It is (a) front view sectional view, (b) side view sectional view, and (c) transverse sectional view of the foam discharge container 1A in an upright state. It is sectional drawing when the foam discharge container 1A is inclined and the container main body is pressed and foam is discharged. It is sectional drawing when squeezing back in the state which inclined 1 A of foam discharge containers. It is sectional drawing when the foam discharge container 1A is squeezed back in an upright state. It is (a) front sectional view, (b) side sectional view, and (c) transverse sectional view of the foam discharge container 1B in an upright state. It is (a) front view sectional view, (b) side view sectional view, and (c) transverse sectional view of the foam discharge container 1C in an upright state.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In each figure, the same numerals indicate the same or equivalent components.

  1A is a front sectional view of a foam discharge container 1A according to an embodiment of the present invention, FIG. 1B is a sectional view in front view, FIG. 1C is a sectional view in side view, and FIG. FIG. 2B is a cross-sectional view when the discharge container 1A is tilted and the outer container is pressed to discharge bubbles, and FIG. 2B is a cross-sectional view when the foam discharge container 1A is tilted and squeezed back, FIG. These are sectional views when the foam discharge container 1A is squeezed back in an upright state. Here, squeeze back means that when the pressure on the outer container is released, the outer container is restored to its original shape by the elasticity of the outer container.

  As shown in these drawings, the foam discharge container 1A includes a flexible plastic outer container 2, a flexible plastic inner container 3 provided on the inside thereof, and these And a former cap 10 that discharges the liquid in the container main body in a foam state by the pressure deformation of the container main body. The space between the outer container 2 and the inner container 3 becomes a liquid chamber filled with the liquid A, the inner container becomes an air chamber, and the gas-liquid mixing chamber 11 is provided in the former cap 10.

  Here, the material of the outer container 2 is polypropylene (PP), high density polyethylene (HDPE), medium density polyethylene (MDPE), and low density polyethylene, which have good so-called squeeze properties (that is, pressability and squeeze back properties). Polyolefin resins such as (LDPE) and polyester resins such as polyethylene terephthalate (PET) can be used singly or in appropriate combinations. Among these, PP is preferable from the viewpoint of obtaining good squeeze properties even when continuously used.

  Moreover, 0.5-1.5 mm is preferable from a viewpoint of obtaining the favorable squeeze property, and the thickness of the part (in this embodiment trunk | drum) which the outer container 2 presses is 0.8-1.2 mm more. preferable.

  As a material of the inner container 3, PP, LDPE, MDPE, and HDPE can be used singly or appropriately in combination from the viewpoint that good squeeze properties can be obtained. When the viscosity of the liquid filled between the outer container and the inner container is high, it is preferable to use HDPE because the liquid becomes difficult to be discharged even by pressing. Thereby, a favorable foam can be obtained. Moreover, 0.1-0.5 mm is preferable and 0.1-0.3 mm is more preferable from the viewpoint which can obtain favorable squeeze property as for the thickness of the part to press (body part in this embodiment). Preferably, 0.2 to 0.3 mm is more preferable. Further, the cross-sectional shape of the inner container 3 (see FIG. 1C) may be an ellipse or the like in addition to a circle.

  As shown in FIG. 1C, in the present embodiment, the outer container 2 has a substantially elliptical cross section, whereas the inner container 3 has a substantially circular cross section. For this reason, the outer container 2 and the inner container 3 are substantially in contact with each other at their body portions. More specifically, the outer container 2 and the inner container 3 are substantially in contact with each other in a region P extending in the longitudinal direction of the outer container 2 through the front center portion on the peripheral surface of the outer container 2. Here, “substantially in contact” means a state in which they are actually in contact with each other, or a state in which the outer container 2 is so close that it comes into contact with each other just by holding the outer container 2 with a hand and pressing it lightly. In this case, although the distance between the outer container 2 and the inner container 3 depends on the material, thickness, etc., it can be said that the distance is usually substantially 3 mm or less. This is the maximum distance (maximum gap) on one side with the inner container 3.

  A liquid chamber between the outer container 2 and the inner container 3 is filled with a foamable liquid A.

  The former cap 10 is removably attached to the mouth portion of the outer container 2 and the mouth portion of the inner container 3 by screwing with the mouth wall of the outer container 2. A bubble C is generated from the liquid A and air B in the inner container 3 and discharged, and a gas-liquid mixing chamber 11 is provided in the housing. In the gas-liquid mixing chamber 11, the liquid inflow hole 12 through which the liquid A between the outer container 2 and the inner container 3 flows into the gas-liquid mixing chamber 11 and the air B in the inner container 3 are transferred to the gas-liquid mixing chamber 11. An air inflow hole 14 is provided to flow into the liquid inlet 12, and a check valve 13 is provided in the liquid inlet hole 12.

  As the check valve 13, it is preferable to provide a thin plate-like valve made of synthetic resin such as polyolefin resin.

  In the former cap 10, a nozzle 15 is formed downstream of the gas-liquid mixing chamber 11, and a bubble homogenizing means 20 is loosely inserted in the nozzle 15. In the gas-liquid mixing chamber 11, when the projecting piece 17 stands up and the foam discharge container 1 </ b> A is in the upright state as shown in FIG. 1A, the foam homogenizing means 20 is placed on the projecting piece 17. Become.

  A groove 16 extending in the axial direction of the nozzle 15 is formed in the inner wall of the nozzle 15, and an outside air inflow path 30 is formed between the inner wall of the nozzle 15 and the outer peripheral surface of the bubble homogenizing means 20 by the groove 16. ing.

  The bubble homogenizing means 20 is configured by attaching nets 22 and 23 to both upper and lower ends of a cylindrical net holder 21, and is movable in the axial direction of the net holder 21 within the nozzle 15. Therefore, when the former cap 10 is tilted so that the opening end of the nozzle 15 faces downward, the foam homogenizing means 20 moves toward the opening end of the nozzle 15, and conversely, the opening end of the nozzle 15 faces upward. When the former cap 10 is tilted, the foam homogenizing means 20 moves toward the base of the nozzle 15.

  Further, a convex portion 24 is formed in a flange shape at the base of the foam homogenizing means 20, and the foam homogenizing means 20 moves toward the opening end of the nozzle 15, and this convex portion 24 is hooked on the base of the nozzle 15. When stopped, the movement of the bubble homogenizing means 20 stops and the outside air inflow path 30 is blocked from the gas-liquid mixing chamber 11.

  The nets 22 and 23 at both the upper and lower ends of the bubble homogenizing means 20 are obtained in order to obtain uniform fine bubbles. In this embodiment, the mesh of the downstream net 23 is finer than the mesh of the upstream net 22. Yes. Depending on the type of the liquid A, the meshes of the nets 22 and 23 at the upper and lower ends of the net holder 21 may be the same. Further, the foam homogenizing means 20 is not necessarily limited to one having nets at both upper and lower ends of the net holder 21. In the bubble homogenizing means 20, the net may be a single layer or may be three or more layers.

This foam discharge container 1A is used as follows.
As shown in FIG. 1, the outer container 2 of the foam discharge container 1 </ b> A that has been upright is gripped, the foam discharge container 1 </ b> A is inverted, and the outer container 2 is pressed. More specifically, as shown in FIG. 2A, the foam discharge container 1 </ b> A is tilted so that the open end of the nozzle 15 of the former cap 10 faces downward, and the body part of the outer container 2 is pressed. By the inclination of the foam discharge container 1A, the foam homogenizing means 20 placed on the projecting piece 17 moves toward the opening end of the nozzle 15, and the convex part 24 at the base of the foam homogenizing means 20 passes through the outside air inflow path 30. Shut off from the gas-liquid mixing chamber 11. Further, as shown in FIG. 2A, the outer container 2 is pressed to squeeze the body portions of both the outer container 2 and the inner container 3, so that the liquid A between the outer container 2 and the inner container 3 flows into the liquid inflow hole 12. The air B in the inner container 3 flows into the gas-liquid mixing chamber 11 through the air inflow hole 14, and bubbles C are generated in the gas-liquid mixing chamber 11. The generated foam C passes through the two layers of nets 22 and 23 of the foam homogenizing means 20 and becomes fine foam, and is discharged from the opening end of the nozzle 15.

  When the pressing of the outer container 2 is released, as shown in FIG. 2B, the outer container 2 and the inner container 3 are restored to the shape before pressing, and the inside is decompressed. As a result, the check valve 13 is closed, and the foam homogenizing means 20 is also drawn into the container body 2, so that the outside air inflow path 30 and the gas-liquid mixing chamber 11 communicate with each other. At this time, when the foam discharge container 1A is placed in the upright state as shown in FIG. 2C, the foam homogenizing means 20 returns until it comes into contact with the protruding piece 17, so that the outside air inflow path 30 and the gas-liquid mixing chamber 11 have a wider flow. Communicate on the road.

  When the outside air inflow passage 30 and the gas-liquid mixing chamber 11 communicate with each other, the outside air passes through the outside air passage 30 and enters the inner container 3 to return the inside of the inner container 3 to normal pressure. The outside air passes between the outer container 2 and the inner container 3 through a slight gap between the check valve 13 and the wall surface of the former cap 10 that is in contact with the check valve 13, and is filled with the liquid A. Return the liquid chamber to normal pressure. This gap is inevitably generated because the check valve 13 is a molded product of a synthetic resin such as polyolefin resin, and air can be passed into the liquid chamber with the check valve 13 closed. However, the gap is such that the backflow of bubbles generated in the gas-liquid mixing chamber 11 into the liquid chamber can be sufficiently prevented.

  Thereafter, in the same manner, it is possible to repeat the discharge of foam by pressing the body portion of the container body 2 with the open end of the nozzle 15 facing downward and the squeeze back by releasing the press.

  The present invention can take various aspects. For example, as in the foam discharge container 1B shown in FIG. 3, in the above-described foam discharge container 1A, the peripheral wall is thickened at the body center portion Q on each of the front surface and the back surface of the outer container 2, and the outer container 2 is formed at that portion. And the inner container 3 may be substantially in contact with each other. Note that when the outer wall 2 and the inner container 3 are substantially brought into contact with each other by making the container wall thick in this way, the portion to be thickened is not limited to the center portion Q shown in the figure. Depending on the shape of the container 2 or the inner container 3, the shoulder may be formed thick.

  As in the foam discharge container 1C shown in FIG. 4, in the above-described foam discharge container 1A, the outer wall 2 and the inner container are formed at the front and rear surfaces of the outer container 2 with the peripheral wall recessed at the trunk center R. 3 may substantially contact. In this case, it is preferable because the concave portion also serves as a guide indicating an appropriate pressing portion.

  Moreover, you may make it the outer container 2 and the inner container 3 contact substantially in the part by thickening a part (for example, trunk | drum center part) of the inner container 3, or providing a convex part. . In this case, it is preferable to provide a mark for clarifying the pressed portion on the outer container 2 at a substantially contacting portion by printing or the like.

  The foam discharge container of the present invention is useful as a squeeze container that discharges various cleaning agents, cosmetics, and the like in the form of foam.

1A, 1B, 1C Foam discharge container 2 Outer container 3 Inner container 10 Former cap 11 Gas-liquid mixing chamber 12 Liquid inflow hole 13 Check valve 14 Air inflow hole 15 Nozzle 16 Groove 17 Projection piece 20 Foam homogenizing means 21 Net holder 22 Upstream Net 23 Downstream Net 24 Convex 30 Outdoor Air Inflow Path A Liquid B Air C Bubble

Claims (4)

A flexible outer container, a flexible inner container provided inside the outer container, and a mouth cap of the outer container and a former cap attached to the mouth of the inner container. A liquid chamber is provided between the container and the former cap, and a gas-liquid mixing chamber is provided in the former cap. By pressing the outer container in an inverted state, the liquid discharged from the liquid chamber and the air discharged from the inner container are gas-liquid. A foam discharge container that forms bubbles by mixing in a mixing chamber, and when the outer container is not pressed, the outer container and the inner container are in contact with each other at the center of the trunk of the outer container or the gap between them is 3 mm. foam dispensing container outer container and the inner container is in substantial contact by at most.   The foam discharge container according to claim 1, further comprising a check valve between the liquid chamber and the gas-liquid mixing chamber. The foam discharge container according to claim 1 or 2 , wherein a wall thickness of the outer container is increased at a substantial contact portion between the outer container and the inner container. Surface of the outer container, the outer container and foam discharge container according to claim 1 or 2, wherein recessed substantially contact portion between the inner container.

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