JP2013245010A - Laminated bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated bottle capable of effectively preventing separation of an inner layer.SOLUTION: A cylindrical laminated bottle 1 with a bottom includes an outer layer 2 and a flexible inner layer 3 housing a content and deformed to be reduced in volume as the content is reduced. The inner layer is stacked on the inner surface of the outer layer so as to be peelable. In a part of the outer layer which is located at a bottle bottom 13, a holding rib 30 is formed to integrally hold the inner layer. In a part of the outer layer, a suction groove 31 is formed to suck outside air into the space formed with the inner layer. The holding rib extends along the bottle bottom, and the length of the rib is set at least equal to or larger than a half of the diameter of the bottle bottom.

Description

  The present invention relates to a laminated bottle.

Conventionally, a laminated bottle comprising an outer layer and a flexible inner layer that accommodates the contents and is reduced in volume as the contents are reduced, and the inner layer is peelably laminated on the inner surface of the outer layer. Are known.
By the way, when this type of laminated bottle is combined with, for example, a pump having a suction pipe extending toward the bottom of the laminated bottle and a discharge device having a pressing head, a discharge container is configured. There is a possibility that the volume is reduced and deformed so as to rise (float) upward, and the suction port of the suction pipe may be blocked, resulting in a discharge failure and an increase in the remaining amount of contents.
In view of this, there is known a laminated bottle in which a locking portion that integrally holds the outer layer and the inner layer is provided at the bottom of the laminated bottle so that the above-described lifting of the inner layer is suppressed during volume reduction deformation (see Patent Document 1).

Japanese Patent No. 3124620

  However, even in the laminated bottle described in Patent Document 1, the inner layer is not sufficiently held, and the inner layer may float up due to volume reduction deformation, and there is still a possibility of causing a discharge failure or the like. It was.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a laminated bottle capable of effectively suppressing the floating of the inner layer.

In order to achieve the above object, the present invention provides the following means.
(1) The laminated bottle according to the present invention includes an outer layer and a flexible inner layer that accommodates the contents and is reduced in volume as the contents are reduced, and the inner layer can be peeled from the inner surface of the outer layer. A bottomed cylindrical laminated bottle laminated on a portion of the outer layer located at the bottom of the bottle is formed with holding ribs that sandwich and hold the inner layer integrally, and part of the outer layer Is formed with a suction groove for sucking outside air between the inner layer, the holding rib extends along the bottom of the bottle, and the length of the rib is at least half the diameter of the bottle bottom. It is characterized by.

According to the laminated bottle of the present invention, since the outside air can be sucked between the outer layer and the inner layer through the suction groove, only the inner layer can be peeled off from the outer layer to reduce the volume (deflection deformation). For example, the contents can be discharged. At this time, a holding rib that holds the inner layer sandwiched between the inner layers of the outer layer constituting the laminated bottle is formed on the portion located at the bottom of the bottle, so that the inner layer is prevented from being lifted during volume reduction deformation. it can. In addition, since the length of the holding rib is more than half the diameter of the bottom of the bottle, the bottom portion of the inner layer can be reliably held over a wide range.
Therefore, the floating of the inner layer can be effectively suppressed. For example, even when a discharger having a suction pipe extending to the vicinity of the bottom of the bottle is attached to the laminated bottle, it is possible to prevent the inner layer from blocking the suction port. Therefore, it is possible to prevent an ejection failure or an increase in the remaining amount of contents.

  Furthermore, since the bottom portion of the inner layer can be held over a wide range by the holding rib, the remaining portion of the bottom portion of the inner layer that is not held (the range that can be lifted) can be made as narrow as possible. Accordingly, it is possible to prevent the contents from being floated together with the inner layer while remaining at the bottom of the inner layer, and in this respect, the effect of reducing the remaining amount can be expected.

(2) In the laminated bottle according to the present invention, the holding rib is formed so as to extend along the bottle radial direction, and the suction groove is formed at a portion of the outer layer located at the bottom of the bottle. It is preferable that it is formed on the extension line.

In this case, since the holding rib is formed along the bottle radial direction with the bottle axis as the center, it is easy to form the holding rib on the outer layer when manufacturing the laminated bottle, and the inner layer can be easily formed. It is easy to pinch and hold it securely. In addition, since the suction groove may be formed on the extended line of the holding rib, the holding rib and the suction groove can be easily formed at the same time.
Further, since the suction groove is formed at the bottom of the bottle, the suction groove can be hidden, and the bottle body can be smoothed over the entire circumference. Accordingly, it is possible to prevent a decrease in appearance (visibility) and a decrease in decoration.

(3) In the laminated bottle according to the present invention, the bottom of the bottle includes a grounding portion located at the outer peripheral edge, and a recessed recess that is continuous with the grounding portion from the inside in the bottle radial direction and raised to the inside of the bottle. The holding rib and the suction groove are preferably formed in the depressed recess.

  In this case, since the holding rib and the suction groove are formed in the recessed recess raised from the bottom of the bottle, even if the holding rib is formed so as to protrude toward the outside of the bottle, the laminated bottle can be stably formed. Can be placed. Further, inhalation of outside air through the suction groove is difficult to be inhibited, and moisture, dust and the like are difficult to enter between the outer layer and the inner layer through the suction groove.

(4) In the laminated bottle according to the present invention, the outer layer and the inner layer are fixed to each other in the circumferential direction via a fixing portion, and the fixing portion is connected to the holding rib with the bottle shaft interposed therebetween. Is preferably located on the opposite side of the bottle radial direction.

  In this case, the inner layer is held on the outer layer by the holding rib and the fixing portion, which are located on the opposite side of the bottle radial direction across the bottle shaft. It becomes possible to crush flat and clean near the center. Therefore, the remaining amount of contents can be further reduced.

  According to the laminated bottle according to the present invention, it is possible to effectively suppress the floating of the inner layer, and it is possible to prevent an ejection failure or an increase in the remaining amount of contents.

It is a figure which shows embodiment of the laminated bottle which concerns on this invention, Comprising: It is a side view (partial cross section) in the state with which the discharge device is mounted | worn. It is a side view (partial cross section) of the laminated bottle shown in FIG. It is AA sectional drawing shown in FIG. It is a top view of the bottle bottom part in the lamination | stacking bottle shown in FIG. It is BB sectional drawing of the bottle bottom part shown in FIG. It is CC sectional drawing of the holding rib shown in FIG.

Hereinafter, an embodiment of a laminated bottle according to the present invention will be described with reference to the drawings.
(Configuration of laminated bottle)
As shown in FIG. 1 to FIG. 3, the laminated bottle 1 of the present embodiment is flexible in that the outer layer 2 and contents not shown are accommodated and the volume is reduced (decreasing deformation) as the contents are reduced. The inner layer 3 is abundant, and the inner layer 3 is peeled and laminated on the inner surface of the outer layer 2 so as to be a bottomed cylindrical delami bottle (laminated peeling type container).
The outer layer 2 and the inner layer 3 are, for example, a polyester resin such as a polyethylene terephthalate resin or a polyethylene naphthalate resin, a polyolefin resin such as a polyethylene resin or a polypropylene resin, a polyamide resin such as nylon, an ethylene vinyl alcohol copolymer resin, or the like. The outer layer 2 and the inner layer 3 are formed in a combination that can be peeled off (no compatibility).

  In the laminated bottle 1, a bottle mouth portion 10, a bottle body portion 11, and a bottle bottom portion 12 are continuously provided in this order along the bottle axis O direction. In the present embodiment, the bottle mouth portion 10 side along the bottle axis O is referred to as the upper side, the bottle bottom portion 12 side as the lower side, and the direction perpendicular to the bottle axis O is referred to as the bottle radial direction.

  As shown in FIG. 1, for example, a discharger 20 is attached to the bottle mouth portion 10. The discharger 20 is a pump-type discharger that discharges contents using a pump, for example, and includes a discharger body 21 and a mounting cap 22 that screwes the discharger body 21 to the bottle mouth 10. It is equipped with.

The discharger main body 21 includes a pump portion having a stem 23 erected so as to be able to be pushed in an upward biased state, and a pressing head 25 attached to an upper end portion of the stem 23.
The pump unit is a delivery device that sends out contents by pushing the stem 23, and a cylinder cylinder 26 that is integrally assembled to the mounting cap 22, and a piston cylinder (not shown) that is inserted into the cylinder cylinder 26 so as to be movable up and down. The stem 23 is attached to the upper part of the piston cylinder in a communicating state. The piston cylinder and the stem 23 are always urged upward by a coil spring (not shown). A suction pipe 27 extending to the vicinity of the bottle bottom 12 of the laminated bottle 1 is attached to the lower end of the cylinder tube 26.

  The pressing head 25 is a top-like cylindrical operating member that pushes the stem 23 downward. The push-down head 25 is formed with a discharge nozzle 28 that communicates with the stem 23 and has a discharge port 28a that opens to the outside in the bottle radial direction.

  As shown in FIGS. 2 to 5, the bottle bottom 12 is connected to the bottle body 11 and is connected to the grounding part 12a located on the outer peripheral edge part, and to the grounding part 12a from the inner side in the bottle radial direction. And a depressed recess 12b raised to the bottom.

  By the way, in the outer layer 2 constituting the laminated bottle 1, the portion located at the bottle bottom portion 12 sucks the outside air between the outer layer 2 and the inner layer 3 with the holding rib 30 that sandwiches and holds the inner layer 3 integrally. A suction groove 31 is formed.

Specifically, as shown in FIGS. 4 and 5, the holding rib 30 and the suction groove 31 are formed in the depressed recess 12 b in the bottle bottom 12. Of these, the holding rib 30 is formed so as to extend along the bottle radial direction from the ground contact portion 12a toward the inside in the bottle radial direction, and the rib length L1 is about 2/3 of the diameter L2 of the bottle bottom portion 12. It is said that the length.
The holding rib 30 is formed so as to protrude downward (toward the outside of the bottle) from the depressed recess 12b, and the height of the rib is set to be within the recess of the depressed recess 12b. . Thereby, the laminated bottle 1 can be stably placed via the grounding portion 12a without being obstructed by the holding rib 30.

The holding rib 30 is formed by, for example, blow molding in a state where the outer layer 2 and the inner layer 3 can be laminated and peeled, and then, as shown in FIG. Bonded by applying external force from both sides of the direction.
That is, it is preferably formed by sandwiching a corresponding portion of the holding rib 30 at the pinch-off portion of the mold during blow molding. In this case, the holding rib 30 is formed on the parting line of the mold. When forming the holding ribs 30, more preferably, using the pins protruding from the pinch-off portions, the horizontal hole-like concave holes 32 are formed so that the opening directions thereof are alternately reversed. A plurality may be formed along the extending direction. By doing so, the crimping portions 33 (biting portions) to which the outer layer 2 and the inner layer 3 are crimped can be alternately arranged along the holding ribs 30, and the reliability of holding the inner layer 3 is effectively enhanced. Can do.

  Further, as shown in FIG. 4, the suction groove 31 is a slit formed along the extension line of the holding rib 30, and is located between the holding rib 30 and the grounding portion 12a.

As described above, the inner layer 3 is integrated with the outer layer 2 by being held by the holding rib 30. However, as shown in FIGS. 2 and 3, the outer layer 2 and the inner layer 3 are further connected via the fixing portion 35. In this way, a part of each circumferential direction is fixed. The fixing portion 35 is an adhesive layer, for example, and adheres the inner layer 3 to the outer layer 2 so as not to be peeled off.
In the illustrated example, the adhering portion 35 extends in a strip shape in the vertical direction over substantially the entire length of the bottle body 11 at a portion located on the opposite side of the bottle radial direction with respect to the holding rib 30 across the bottle axis O. Is formed.

(Operation of laminated bottle)
Next, the case where the contents are discharged using the discharger 20 attached to the laminated bottle 1 configured as described above will be described.
In this case, the stem 23 is pushed down by the push-down operation of the push-down head 25, and the contents contained in the inner layer 3 are sucked up from the suction port 27a opened at the lower end of the suction pipe 27. Then, the sucked contents are ejected into the discharge nozzle 28 of the pressing head 25 through the stem 23. Thereby, the contents can be discharged to the outside through the discharge port 28 a of the discharge nozzle 28.

By the way, when the contents are sucked up, as shown in FIG. 2, the inner layer 3 is deformed and deformed, so that a negative pressure is generated between the inner layer 3 and the outer layer 2. Therefore, outside air is sucked between the outer layer 2 and the inner layer 3 through the suction groove 31. Thereby, along with the discharge of the contents, only the inner layer 3 can be peeled from the outer layer 2 without deforming the outer layer 2, and the volume can be reduced.
At this time, since a holding rib 30 is formed in a portion of the outer layer 2 located in the recessed recess 12b so as to sandwich and hold the inner layer 3 integrally, the inner layer 3 is prevented from floating during the volume reduction deformation. it can. Moreover, since the rib length L1 of the holding rib 30 is about 2/3 of the diameter L2 of the bottle bottom portion 12, the bottom portion of the inner layer 3 can be held over a wide range.

Therefore, the floating of the inner layer 3 can be effectively suppressed, and the inner layer 3 can be prevented from blocking the suction port 27a of the suction pipe 27. Therefore, it is possible to prevent an ejection failure or an increase in the remaining amount of contents.
Furthermore, since the bottom portion of the inner layer 3 can be held over a wide range by the holding rib 30, the remaining portion (the liftable range) of the bottom portion of the inner layer 3 that is not held can be made as narrow as possible. Therefore, it is possible to prevent the contents from being floated together with the inner layer 3 while remaining at the bottom of the inner layer 3, and in this respect, the effect of reducing the remaining amount can be expected.

Further, since the inner layer 3 is held by the outer layer 2 by the holding rib 30 and the fixing portion 35 that are located on the opposite side of the bottle radial direction across the bottle axis O, the inner layer 3 is removed from the bottle along with the volume reduction deformation. It becomes possible to crush flat and clean near the center. Therefore, the remaining amount of contents can be further reduced.
In addition, when the inner layer 3 is shifted to one side of the laminated bottle 1 and is crushed, there is a possibility that the suction pipe 27 is pushed and bent sideways, but in the case of the present embodiment, it is difficult to cause such a problem. .

  Furthermore, since the holding rib 30 and the suction groove 31 are formed in the depressed recess 12b, the laminated bottle 1 can be stably placed without being obstructed by the holding rib 30. Further, inhalation of outside air through the suction groove 31 is difficult to be inhibited, and moisture, dust and the like are difficult to enter between the outer layer 2 and the inner layer 3 through the suction groove 31.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, the outer layer 2 may be a squeeze deformable container, and the inner layer 3 may be deformed and deformed by squeeze deformation of the outer layer 2.
In addition, the holding rib 30 is formed so as to extend along the bottle radial direction, and the suction groove 31 is formed so as to be positioned on the extension line of the holding rib 30. However, the present invention is not limited to this case. However, when the holding rib 30 is formed so as to extend along the bottle radial direction, the holding rib 30 can be easily formed on the outer layer 2 and the inner layer 3 can be easily sandwiched when the laminated bottle 1 is manufactured. It becomes easy to hold securely.

  Also, the suction groove 31 is preferably formed on the extended line of the holding rib 30 because the holding rib 30 and the suction groove 31 can be easily formed at the same time. For example, the suction groove 31 may be formed in the depressed recess 12 b so as to be parallel to the holding rib 30, or may be formed in the bottle body 11. However, by forming the suction groove 31 in the depressed recess 12b, the suction groove 31 can be hidden, and the bottle body 11 can be smoothed over the entire circumference. Accordingly, it is possible to prevent a decrease in appearance (visibility) and a decrease in decoration.

Further, although the rib length L1 of the holding rib 30 is about 2/3 of the diameter L2 of the bottle bottom 12, the length may be at least half of the diameter L2.
(Example)
Here, the Example which actually performed the discharge test of the content based on the said embodiment is demonstrated. As an embodiment according to the present invention, the rib length L1 of the holding rib 30 is about 2/3 of the diameter L2 of the bottle bottom 12. As a comparative example for this, the rib length L1 of the holding rib 30 is about 程度 of the diameter L2 of the bottle bottom 12. In either case, the content amount is set to 400 g, and after discharging is performed using the above-described discharger 20 until the content is not discharged, the remaining content remaining in the inner layer 3 is retained. Check the amount.

  As a result, in the case of the example, the remaining amount averaged 21 g, whereas in the comparative example, the remaining amount averaged 30 g. From this, it was actually confirmed that the holding rib 30 according to the present invention is effective in reducing the remaining amount of contents.

O ... Bottle shaft L1 ... Rib length 1 ... Laminated bottle 2 ... Outer layer 3 ... Inner layer 11 ... Bottle body 12 ... Bottle bottom 12a ... Grounding part 12b ... Indented recess 30 ... Holding rib 31 ... Suction groove 35 ... Adhering part

Claims (4)

A bottomed cylindrical laminated bottle having an outer layer and a flexible inner layer that accommodates the contents and is reduced in volume as the contents are reduced, and is laminated on the inner surface of the outer layer so as to be peelable. Because
A holding rib for holding the inner layer in an integrated manner is formed on a portion of the outer layer located at the bottom of the bottle,
A part of the outer layer is formed with a suction groove for sucking outside air with the inner layer,
The holding rib is
A laminated bottle characterized by extending along the bottom of the bottle and having a rib length at least half the diameter of the bottle bottom. The laminated bottle according to claim 1,
The holding rib is formed to extend along the bottle radial direction,
The laminated bottle is characterized in that the suction groove is formed on an extended line of the holding rib in a portion of the outer layer located at the bottom of the bottle. The laminated bottle according to claim 2,
The bottle bottom is
A grounding portion located at the outer periphery,
The grounded portion is connected from the inside in the bottle radial direction, and includes a depressed recess raised to the inside of the bottle,
The laminated bottle, wherein the holding rib and the suction groove are formed in the depressed recess. The laminated bottle according to any one of claims 1 to 3,
The outer layer and the inner layer are fixed to each other in the circumferential direction via fixing portions,
The laminated bottle is characterized in that the adhering portion is located on the opposite side of the bottle radial direction from the holding rib across the bottle shaft.

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