JP2018154390A - Double aerosol container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double aerosol container in which the residual of an undiluted solution can be suppressed as far as possible.SOLUTION: Provided is a double aerosol container which comprises an outer container 10, an inner bag 20 which is housed in the outer container 10 and is for filling the inside with an undiluted solution C, and a valve assembly 30 which closes opening parts 10a, 20a of the outer container 10 and the inner bag 20, in which the inner bag 20 is compresses by a pressurizing agent P fed into the space between the outer container 10 and the inner bag 20, to discharge the undiluted solution C. The inner bag 20 is made of synthetic resin and comprises a bottom part 20b, a cylindrical trunk part 20c, a neck part 20d to which the valve assembly 30 is fitted, and a bellows part 20e which is provided between the trunk part 20c and the neck part 20d. The neck part 20d protrudes from the opening part 10a of the outer container 10 under a condition that the bottom part 20b is loaded on the inner bottom surface of the outer container 10, and the thickness of the neck part 20d is 0.3 to 0.5 mm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a double aerosol container having an outer container, an inner bag, and a valve assembly, and in particular, compresses the inner bag with a pressurizing agent filled in a space between the outer container and the inner bag, and a stock solution in the inner bag. The present invention relates to a double aerosol container for discharging water.

  Patent Document 1 discloses an inner bag for filling a stock solution used for a double aerosol product. The inner bag supports the valve assembly in a state where it is floated from the outer container when filling the space between the outer container and the inner bag with the pressure agent, and the pressure agent filling gap is provided between the outer container and the valve assembly. After the pressurizing agent is filled, the bellows part is provided to allow the valve assembly to be pushed, that is, to adjust the height in the vertical direction.

JP 2011-136747 A

  By the way, since the bellows part acts as a rib with respect to the lateral direction, the bellows part is less likely to be deformed than other parts. Further, the valve assembly is also inserted in the vicinity of the upper end of the inner bag, so that it is difficult to deform. Therefore, it does not shrink as expected from the vicinity of the upper end of the inner bag to the bellows part, and a large amount of stock solution remains in this part.

  Then, this invention aims at provision of the double aerosol container which can suppress the residue of stock solution as much as possible.

  The double aerosol container of the present invention closes the outer container 10, the inner bag 20 that is accommodated in the outer container 10 and is filled with the stock solution C, and the openings 10 a and 20 a of the outer container 10 and the inner bag 20. A double aerosol container comprising a valve assembly 30 and compressing the inner bag 20 with a pressurizing agent P filled in a space between the outer container 10 and the inner bag 20 and discharging the stock solution C. The outer container 10 is made of a synthetic resin and includes a bottom portion 20b, a cylindrical barrel portion 20c, a neck portion 20d to which the valve assembly 30 is attached, and a bellows portion 20e provided between the trunk portion 20c and the neck portion 20d. The neck 20d protrudes from the opening 10a of the outer container 10 in a state where the bottom 20b is placed on the inner bottom surface, and the thickness of the neck 20d is 0.3 to 0.5 mm. Yes.

  By attaching the valve assembly 30 to the outer container 10, it is preferable that the bellows portion 20e of the inner bag 20 is compressed in the axial direction and partly folded.

  The valve assembly 30 includes an annular outer peripheral wall 41b inserted into the opening 20a of the inner bag 20, a housing 41 that houses the valve mechanism 42, and a housing cover 47 that is mounted on the housing 41 within the outer peripheral wall 41b. The upper end of the housing cover 47 is preferably open in the outer peripheral wall 41b.

  In the double aerosol container of the present invention, the neck portion of the inner bag has a thickness of 0.3 to 0.5 mm, so that the neck portion is easily deformed, and the bellows portion continuous to the lower portion of the neck portion is also easily deformed. Thus, the remaining amount of the stock solution in the bellows portion between the neck portion and the bellows portion can be reduced. Further, if a part of the bellows part is folded, the rigidity of the bellows part in the radial direction is reduced correspondingly, and the bellows part is further easily deformed. If the upper end of the housing cover is open in the outer peripheral wall, the stock solution passage toward the housing can be secured even if the neck portion and the bellows portion are radially compressed and deformed irregularly.

It is sectional drawing which shows one Embodiment of the double aerosol container of this invention. It is sectional drawing which shows the double aerosol container after discharging stock solution. It is sectional drawing which shows the state which mounted | wore the inner bag with the valve assembly. It is sectional drawing which shows other embodiment of a double aerosol container. It is sectional drawing which shows other embodiment of a double aerosol container.

  Next, the double aerosol container of this invention is demonstrated based on drawing. As shown in FIGS. 1 to 3, the double aerosol container of the present invention has an outer container 10 having an opening 10 a at the upper end and an inner bag that has an opening 20 a at the upper end and is accommodated in the outer container 10. 20 and a valve assembly 30 that is attached to both the opening 10a of the outer container 10 and the opening 20a of the inner bag 20 and communicates / blocks the inside and the outside of the inner bag 20 with each other.

  The outer container 10 includes a bottom part 10b, a cylindrical body part 10c, a constricted part 10d whose diameter is reduced above the body part 10c, and a cylindrical rising part 10e that rises from the upper end of the constricted part 10d. The opening 10a is provided at the upper end of the rising portion 10e.

  The outer container 10 is formed, for example, by forming a metal disk such as aluminum into a bottomed cylindrical shape by impact processing or squeezing and ironing, or forming a metal plate into a bottomed cylindrical shape by squeezing and ironing, and a synthetic resin coat is formed on the inner surface. Then, the upper end of the body portion 10c is necked to form the constricted portion 10d and the rising portion 10e. Even if at least the pressurizing agent P is filled, it is further immediately after the pressurizing agent is filled. When the valve assembly 30 is attached to the valve assembly 30, the valve assembly 30 has a pressure resistance enough to prevent the burst or shape from changing even if the valve assembly 30 is lowered and a load is applied in the axial direction.

  The inner bag 20 includes a bottom portion 20b, a cylindrical trunk portion 20c, a neck portion 20d to which the valve assembly 30 is attached, and a bellows portion 20e provided between the trunk portion 20c and the neck portion 20d. The opening 20a is provided at the upper end of the neck 20d. The neck portion 20d includes a cylindrical base portion 20f positioned at the upper end of the bellows portion 20e, a diameter-enlarged portion 20g extending outward from the upper end of the base portion 20f, and a cylindrical valve fitting portion extending upward from the upper end of the enlarged-diameter portion 20g. 20h.

  As shown in FIG. 3, the bellows portion 20 e is configured by alternately repeating an inner inclined portion 20 e 1 that is inclined and extends inward and an outer inclined portion 20 e 2 that is inclined outward from the upper end thereof. The bellows portion 20e of the present embodiment has two inner inclined portions 20e1 and two outer inclined portions 20e2, and when the inner bag 20 is viewed from the outside, there are two valley fold portions V. These valley fold portions V , One mountain fold M is formed between V and V. The outermost diameter of the bellows portion 20e (the outer diameter at the apex of the mountain fold portion M) is substantially the same as the outer diameter of the base portion 20f of the trunk portion 20c and the neck portion 20d. The angle (angle with respect to the horizontal plane) α of the inclined portions 20 e 1 and 20 e 2 is about 45 degrees before the valve assembly 30 is mounted on the outer container 10. However, it can be about 30 to 60 degrees.

  The inner bag 20 is manufactured by blow molding a synthetic resin, and has such flexibility that it can be crushed by the pressure of the pressurizing agent P filled between the outer container 10 and the inner bag 20. Yes. Examples of the synthetic resin include polyethylene, polypropylene, polyethylene terephthalate, nylon, and eval. These are used as a single layer or a laminate of two or more.

  The wall thickness of the inner bag 20 is 0.2 to 0.8 mm, preferably about 0.25 to 0.7 mm, but the neck portion 20 d is particularly 0.3 to 0.5 mm. This is because if the thickness of the neck portion 20d is less than 0.3 mm, accurate molding becomes difficult, and if it exceeds 0.5 mm, the base portion 20f and the bellows portion 20e of the neck portion are difficult to deform.

  The total length (height in the vertical direction) is determined by inserting the inner bag 20 into the outer container 10 and placing the bottom 20b of the inner bag 20 on the inner bottom surface of the outer container 10, as shown in FIG. The neck 20d of the bag 20 (particularly the valve fitting portion 20h) is set to a length that protrudes upward from the opening 10a of the outer container 10. This is because when the pressurizing agent P is filled, the valve assembly 30 is supported by the inner bag 20, and a gap for filling the pressurizing agent is formed between the valve assembly 30 and the outer container 10. The protrusion is absorbed mainly by folding the bellows portion 20e (see FIG. 1).

  The valve assembly 30 seals the valve 40 that selectively discharges / blocks the stock solution C filled in the inner bag 20 to the outside, the opening 10a of the outer container 10, and the opening 20a of the inner bag 20, respectively. The gasket 50 and the cover cap 60 that fixes the valve 40 to the outer container 10 and the inner bag 20 are configured.

  The valve 40 includes a housing 41, a valve mechanism 42, and a housing cover 47 that surrounds the housing 41 from below.

  The housing 41 includes an inner cylinder 41a that supports the stem 43, and an outer peripheral wall 41b that is slightly larger than the inner diameter of the valve fitting portion 20h of the inner bag 20 and that fits and seals with the valve fitting portion 20h. Yes. The inner cylinder 41a and the outer peripheral wall 41b are connected by a top plate 41c straddling the upper ends of the inner cylinder 41a and the outer peripheral wall 41b, and a plurality of vertical ribs 41d provided radially around the inner cylinder 41a. .

  The inner cylinder 41a is substantially cylindrical, and the entire upper surface is open. On the inner peripheral surface of the inner cylinder 41a, a plurality of grooves 41e are formed at equal intervals in the vertical direction, and a passage is formed between the outer periphery of the stem 43 inserted into the inner cylinder 41a. Yes. Further, a plurality of grooves 41 f are formed at equal intervals in the vertical direction on the outer peripheral surface of the inner cylinder 41 a, and a passage is formed with the inner peripheral surface of the housing cover 47. A cylindrical lower cylinder 41h having a smaller diameter than the inner cylinder 41a extends from the bottom 41g of the inner cylinder 41a. The lower cylinder 41h and the inner cylinder 41a communicate with each other through a small hole 41i provided at the center of the bottom 41g of the inner cylinder 41a.

  The outer peripheral wall 41b is substantially cylindrical and has a lower end opened. The outer peripheral surface of the outer peripheral wall 41b is provided with an annular convex portion 41j. The valve fitting portion 20h and the enlarged diameter portion 20g of the inner bag 20 are pushed outward in the radial direction, and the pressurizing agent P is filled with the undercup. At this time, sealing is performed so that the pressurizing agent P does not enter the inner bag 20. Further, when the valve assembly 30 is mounted on the outer container 10, the outer surface of the inner bag 20 is brought into contact with the inner surface of the outer container 10.

  The top plate 41c is formed in a staircase shape that descends toward the inner cylinder 41a in the vicinity of the upper end of the inner cylinder 41a. The number of stages is two, the lower stage 41k side is a part for mounting the stem rubber 44, and the upper stage 41m side is a part for attaching the cover body 45. Moreover, the top plate 41c extends radially outward beyond the upper end of the outer peripheral wall 41b to form a flange portion 41n. An annular gasket 50 is arranged at the corner formed by the lower surface of the flange portion 41n and the outer peripheral surface of the outer peripheral wall 41b, and abuts against the upper ends of the outer container 10 and the inner bag 20 to form a seal. doing.

  The valve mechanism 42 includes a bottomed cylindrical stem 43 that is inserted into the housing 41 so as to freely move up and down, and a stem rubber 44 that is positioned on the outer periphery of the stem 43 and closes a stem hole 43 a provided on the side surface of the stem 43. The disc-shaped cover body 45 that covers the upper surface of the stem rubber 44 and the elastic body 46 (coil spring) that constantly biases the stem 43 upward.

  The housing cover 47 has a substantially cylindrical shape having an opening 47a at the upper end and a bottom 47b at the lower end. The housing cover 47 is attached to the inner cylinder 41 a and the lower cylinder 41 h of the housing 41, and the lower side thereof has a small diameter in accordance with the lower cylinder 41 h that has a smaller diameter than the inner cylinder 41. . The upper part of the housing cover 47 has a tapered shape that gradually increases in diameter as it goes upward. A slit 47d is formed in the enlarged diameter portion 47c corresponding to the vertical rib 41d of the housing 41. The slit 47d is formed to be shorter than the vertical length of the vertical rib 41d. When the housing cover 47 is externally fitted to the inner cylinder 41a and the lower cylinder 41h of the housing 41, the upper end of the housing cover 47 and the housing 41 An opening is formed between the lower surface of the top plate 41c. This opening serves as a take-in port for taking the stock solution C in the inner bag 20 into the valve 40.

  In the double aerosol container 1 having the above configuration, the inner bag 20 is filled with the stock solution C, the valve assembly 30 is placed in the opening 20a of the inner bag, and the pressure agent P is placed between the outer container 10 and the inner bag 20. The inner bag 20 is compressed (contracted) by the pressure of the pressurizing agent P by fixing the valve assembly 30 to the outer container 10 and attaching a discharge member (not shown) to the stem 43. It becomes the double aerosol product which discharges stock solution C from valve 40.

  As the stock solution C to be filled, a stock solution C (viscous content) having a viscosity of 1000 to 100,000 MPa · s at 25 ° C. such as cream, paste or gel can be filled. Possible uses include various products such as hair products such as two-component hair dyes and skin products such as two-component exothermic preparations (cleansing and shaving agents). When used as a two-component product, the first aerosol product filled with the first stock solution and the second aerosol product filled with the second stock solution are attached to the discharge member.

  As the pressurizing agent P, for example, a compressed gas such as nitrogen, compressed air, carbon dioxide, nitrous oxide is filled. The pressure after filling is, for example, 0.4 to 1.0 MPa at 25 ° C. Note that liquefied gas may be filled.

  By the way, as shown in FIG. 3, the pressurizing agent P is filled in a state where the housing 41 is slightly lifted from the opening 10a of the outer container 10 (so-called undercup filling). After filling the pressurizing agent P, the housing 41 is pushed down to compress the gasket 50 to the upper end of the outer container 10 (see FIG. 1). At this time, the inner bag 20 is compressed in the axial direction (vertical direction), and the bellows portion 20e contracts in the vertical direction. In the shrinkage, the valley fold V and the mountain fold M are not evenly bent, but a part (the upper valley fold V in FIG. 1) is extremely bent. And the overlapping part 21 with which the inner side inclination part 20e1 and the outer side inclination part 20e2 which adjoin each other overlap is formed. In order to reliably form the overlapping portion 21, the thickness of the portion where the overlapping portion 21 is to be formed is made thinner than the other portions, the angle α of the inclined portion is made shallower than the other inclined portions, It may be attached.

  By operating the stem 43, the double aerosol product can open the stem hole 43a closed by the stem rubber 44 and discharge the stock solution C. The stock solution C passes from the opening 47a at the upper end of the housing cover 47 to the passage formed by the housing cover 47 and the groove 41f outside the inner cylinder 41a of the housing 41, and between the housing cover 47 and the lower cylinder 41h of the housing 41. , A small hole 41i in the bottom 41g of the housing 41, a passage between the groove 41e inside the inner cylinder 41a of the housing 41 and the outer peripheral surface of the stem 43, the stem hole 43a, and the inside of the stem It is discharged to the outside through the passage and the discharge member (see the arrow in FIG. 1).

  As the stock solution C is discharged, the inner bag 20 shrinks in the radial direction as the stock solution C decreases. The shrinkage starts from the deformable body portion 20c and eventually reaches the neck portion 20d and the bellows portion 20e, but the inner bag 20 used in the present invention has a thin thickness of 0.3 to 0.5 mm at the neck portion 20d. Therefore, the neck portion 20d is easily deformed. In addition, since a part of the bellows portion 20e is folded and the overlapping portion 21 is formed in which the inclined portions 20e1 and 20e2 overlap each other, it is apparent that the number of bellows (the number of mountain fold portions M and valley fold portions V). And the bellows portion 20e is easily deformed. Specifically, since the inclined portions 20e1 and 20e2 overlap each other, the rigidity in the vertical direction becomes small and deforms so as to be twisted (lateral buckling). Therefore, as shown in FIG. 2, for example, a large deformation occurs from the neck portion 20d to the bellows portion 20e so that a part of the neck portion 20d contacts the housing cover 47, and the residual of the stock solution C is suppressed as much as possible. In addition, since the intake port for the stock solution C (the opening 47a of the housing cover 47) is located in the space surrounded by the outer peripheral wall 41b of the housing 41, the inner bag 20 is large and irregularly deformed. However, the uptake of the stock solution C is not hindered by the inner bag 20, and the stock solution C can be discharged to the end.

  The double aerosol container 2 shown in FIG. 4 is provided with a constricted portion 22 at the neck portion 20d of the inner bag 20A. Specifically, the constricted portion 22 is provided at the base portion 20f between the bellows portion 20e and the enlarged diameter portion 20g. If the constricted portion 22 is provided in this manner, the volume from the neck portion 20d to the bellows portion 20e can be reduced in advance, and the remaining stock solution C can be suppressed. Further, when discharging the stock solution C, it is led out toward the upper opening 47a, and the thickness of the neck 20d is as thin as 0.3 to 0.5 mm. As shown, the inner bag 20A is contracted and deformed so as to be lifted toward the housing 41, and the residual amount of the stock solution C can be further reduced. The other portions are the same as the aerosol container shown in FIGS. 1 to 3. For example, the overlapping portion 21 of the inner bag 20 </ b> A is the same as the inner bag 20 shown in FIG. 3 before the valve assembly 30 is pushed down. It is not formed, but is formed for the first time by pushing down the valve assembly 30.

  The double aerosol container 3 shown in FIG. 5 differs from the double aerosol containers 1 and 2 in the valve assembly 31. Specifically, a portion corresponding to the outer peripheral wall 41 b of the housing 41 is separate from the housing 49. The separated portion (mounting cup 48) includes an inverted cup-shaped housing holding portion 48a, an outer peripheral portion 48c provided between the housing holding portion 48a and an annular deep groove 48b, and an outer peripheral portion thereof. And a flange portion 48d at the upper end of 48c. The deep groove 48b is provided in order to obtain elasticity when the housing 49 is fitted, and further, in order to enhance the sealing performance when the outer peripheral portion 48c is bent and the valve 40 is attached.

  In the valve assembly 31 configured as described above, since a space for storing the stock solution C is hardly formed from the outer peripheral portion 48c to the housing 49, the residual of the stock solution C is suppressed as compared with the double aerosol containers 1 and 2 shown in FIGS. be able to. Further, it is not necessary to provide the housing cover 47. By providing the opening 49 a on the side surface of the housing 49, the stock solution C can be discharged to the end even if the inner bag 20 </ b> B contracts to be in close contact with the housing 49. A plurality of openings 49a are preferably provided. Furthermore, it is preferable to provide at equal intervals in the circumferential direction. Other configurations are substantially the same as those of the aerosol containers 1 and 2 described above. For example, also in the inner bag 20B, before the valve assembly 31 is pushed down, the overlapping portion 21 is formed as in the inner bag 20 shown in FIG. However, the overlapping portion 21 is formed only when the valve assembly 30 is pushed down. The thickness of the inner bag 20B is the same as that of the inner bags 20, 20A, and the thickness of the neck portion 20d is as thin as 0.3 to 0.5 mm.

As mentioned above, although typical embodiment of this invention was described, this invention is not limited to the said embodiment, It can be implemented in various changes within the scope of this invention. For example, the bellows angle α may be increased. By increasing the angle α of the bellows portion, the rigidity in the lateral direction (radial direction) of the bellows portion is reduced. Therefore, the entire bellows portion is deformed even if the overlapping portion 21 is not formed when the valve assembly is mounted on the outer container. Easy to use, and the remaining amount of the stock solution is reduced. As a method of increasing the angle α of the bellows portion, for example, the bellows portion is made longer than the bellows portion 20e of FIG. 3, and the base portion 20f of the neck portion is shortened accordingly.
Further, the number of the mountain folds M and the valley folds V of the bellows part 20e is not limited to two, and may be one or three or more. The position where the overlapping portion 21 is formed is not limited to the uppermost mountain fold portion M and the valley fold portion V, and may be formed at the lowermost or middle mountain fold portion M and valley fold portion V.

1, 2, 3 Double aerosol container 10 Outer container 10a Opening part 10b Bottom part 10c Body part 10d Constriction part 10e Standing part 20, 20A, 20B Inner bag 20a Opening part 20b Bottom part 20c Body part 20d Neck part 20e Bellows part 20f Base part 20g Expansion Diameter portion 20h Valve fitting portion 20e1 Inner inclined portion 20e2 Outer inclined portion 21 Superposed portion 22 Constricted portion 30, 31 Valve assembly 40 Valve 41 Housing 41a Inner cylinder 41b Outer wall 41c Top plate 41d Vertical rib 41e Inner peripheral surface side groove 41f Outer peripheral surface side groove 41g Bottom 41h Lower cylinder 41i Small hole 41j Convex 41k Step (lower)
41m step (upper)
41n Flange portion 42 Valve mechanism 43 Stem 43a Stem hole 44 Stem rubber 45 Cover body 46 Elastic body 47 Housing cover 47a Opening portion 47b Bottom portion 47c Expanded portion 47d Slit 48 Mounting cup 48a Housing holding portion 48b Deep groove 48c Outer peripheral portion 48d Flange portion 49 Housing 49a Opening 50 Gasket 60 Cover cap C Stock solution P Pressure agent M Mountain fold V Valley fold

Claims (3)

An outer container,
An inner bag that is housed in an outer container and is filled with a stock solution;
A valve assembly for closing the opening of the outer container and the inner bag,
A double aerosol container that compresses the inner bag with a pressurizing agent filled in the space between the outer container and the inner bag and discharges the stock solution,
The inner bag is made of synthetic resin, and includes a bottom portion, a cylindrical barrel portion, a neck portion to which a valve assembly is attached, and a bellows portion provided between the trunk portion and the neck portion, and a bottom portion on the inner bottom surface of the outer container. A double aerosol container, wherein the neck protrudes from the opening of the outer container in a state where is placed, and the thickness of the neck is 0.3 to 0.5 mm. The double aerosol container according to claim 1, wherein by attaching the valve assembly to the outer container, the bellows part of the inner bag is compressed in the axial direction and a part thereof is folded. The valve assembly includes an annular outer peripheral wall inserted into the opening of the inner bag, a housing that houses the valve mechanism, and a housing cover that is attached to the housing within the outer peripheral wall.
The double aerosol container according to claim 1 or 2, wherein an upper end of the housing cover is opened in a space surrounded by an outer peripheral wall.

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