JP5445931B2 - Synthetic resin blow molding housing - Google Patents

Description

The present invention relates to a so-called Delami bottle made of a synthetic resin, which is composed of an outer layer that forms an outer shell and an inner layer that is detachably laminated on the outer layer and forms an inner bag body that can be deflated.

Patent Document 1 describes a squeeze-type dispensing container in which a dispensing cap is disposed on the mouth tube portion of a delami bottle.
FIGS. 5 and 6 show an example of this type of dispensing container. FIG. 5 (a) is a half vertical side view, FIG. 5 (b) is a perspective view near the bottom, and FIG. FIG. 5 is a plan sectional view taken along line C, in which a dispensing cap 31 having a check valve is disposed in the mouth tube portion 102 of the casing 101 (Delami bottle).
The casing 101 has a mouth tube portion 102, a shoulder portion 103, a trunk portion 104, and a bottom portion 105, and an outer layer 111 that forms an outer shell, and an outer bag 111 that can be peeled and laminated on the outer layer so as to be deformable. It is comprised from the inner layer 112 which forms 112a.
Moreover, the trunk | drum 104 is cylindrical as seen in FIG.

  This dispensing container is used for dispensing a relatively high-viscosity content liquid such as creamy cosmetics. When the container body is pressed by hand in a squeeze shape, External air is introduced between the outer layer 111 and the inner layer 112, and the inner layer 112 retains its deformed shape while the outer layer 111 is restored to its original shape by its restoring force. Almost the entire amount can be used up, and the effect of the check valve can be combined to prevent the air from entering the inner bag body 112a from the outside, thereby suppressing the deterioration of the content liquid.

FIG. 6 illustrates the state of the inner layer 112 withering and deforming during use. In this way, the inner layer 112 is partially deformed with reversal deformation in part, the inner layer 112 positioned oppositely is partially joined together, and the flow path of the content liquid L is secured in the other part. .
Then, at the stage where the content liquid is almost used up, the inner layer 112 is further deflated, and in most part, the inner layer 112 is in close contact and the flow path is closed.
Here, in this type of delami bottle, the inner layer 112 is controlled to be deflated and deformed as described above so that the flow passage of the content liquid is secured to the end so that the pouring operation can be achieved smoothly. Is one of the important technical elements.

JP 2003-72864 A

  The inventors of the present application are able to prevent the deterioration of the quality of the content liquid by preventing the intrusion of air from the outside into the inner bag body by the dispensing container in which the dispensing cap is combined with the delami bottle as described above. Utilizing the fact that it can be used, this type of dispensing container is being used and expanded for applications that require a freshness such as a content mainly composed of a relatively low viscosity liquid, particularly food seasonings. .

  When the viscosity of the content liquid is relatively low, unlike the case of content liquids with relatively high viscosity, such as cream, the dispensing container is not tilted, and the pouring container is tilted from its upright position or inverted position. Thus, it can be used in a new mode which is not a conventional container of this type, such that the liquid is poured out by its own weight and by natural fall.

  On the other hand, in the new usage mode as described above, in order to smoothly dispense the content liquid and use the content liquid almost to the end, the external force such as squeeze is used along with the content liquid. Therefore, it is necessary that the inner layer withering deformation as shown in FIG. 6 progresses smoothly and smoothly from the bottom to the shoulder through the trunk.

  However, when the conventional casing 101 (Delami bottle) as shown in FIGS. 5 and 6 is used in the new mode as it is, the progress of the deflation of the inner layer 112 in the vicinity of the bottom 105 is smoothly and sufficiently progressed. However, in the vicinity of the lower end portion of the body portion 104, there is a problem that the inner layer 112 is warped and deformed first, the flow path is blocked, and the liquid content remains without being used up.

Accordingly, the present invention is a delamination bottle that is a blow molded casing made of synthetic resin, and the inner layer withering deformation in the vicinity of the bottom accompanying the dispensing of the content liquid can proceed smoothly and sufficiently without applying external force. It is a technical problem to construct the body shape.

Among the means for solving the technical problems, the main configuration of the present invention is:
The mouth tube part is erected from the upper end of the cylindrical body part through the shoulder, and the outer layer forming the outer shell and the outer layer are detachably laminated to form the inner bag body (12a) that can be deformed by warping. The inner layer (12) is a synthetic resin blow molding housing formed by a blow molding method in which two types of synthetic resin materials are coextruded,
In the predetermined position of the outer layer, an intake hole for introducing external air between the outer layer and the inner layer is opened,
The shape from the torso to the bottom is a flat cylindrical shape with a flat cross-sectional shape flattened in the front-rear direction,
The shape of the bottom portion as well as the curved surface shape toward selfish bulges down direction,
In the region from the predetermined height position of the body part to the bottom part, the long diameter and the short diameter of the flat flat cross-sectional shape are configured to be gradually reduced from the predetermined height position of the body part toward the bottom part. is there.
In the above configuration, the direction in which the flat cross-sectional shape is flattened is defined as the front-rear direction for convenience in order to define the direction of the housing.

  The present inventors examined the behavior of the inner layer 112 at the bottom 105 of the conventional casing 101 shown in FIGS. 5 and 6, and the bottom 105 is a simple cylindrical body 104. In contrast, as shown in FIG. 5B, it is formed in a bottomed cylindrical shape from the side peripheral wall 105p and the bottom wall 105b, that is, it is relatively thick because of a blow molded product, The bottom wall 105b formed substantially vertically becomes an obstacle, and the reversal deformation of the inner layer 112 does not progress smoothly during the wilting deformation, which is the main factor that the wilting deformation does not proceed smoothly and sufficiently at the bottom 105. Based on the results of this study, the inventors have created the above configuration.

When the casing (Delami bottle) with the above configuration is used as the container body of a dispensing container combined with a dispensing cap with a check valve,
First, the shape from the torso to the bottom is roughly a flat cylindrical shape with a flat cross-sectional shape flattened in the front-rear direction, so that the inner layer withering deformation is further flattened in the front-rear direction of the housing. Can be controlled.
In other words, when viewed in terms of a flat cross-sectional shape, the inner layer initially formed in an elliptical shape, an oval shape, etc. is further flattened while being inverted and deformed in the front-rear direction as the content liquid is poured, and finally in the front-rear direction It is in a state of being stacked twice in the direction.

In addition, by making the shape of the bottom portion bulged into a spherical arc shell flattened in the front-rear direction facing downward,
Conventionally, the shape of the bottom that has been configured from the side wall and the bottom wall as described above, so-called so-called distinction between the side wall and the bottom wall is eliminated, and from the boundary with the body part to the bottom end of the bottom (the center of the bottom) Until then, the cross-sectional shape can be a shape that gradually and smoothly changes to a reduced diameter,
By adopting such a shape, in combination with the above-described effect of the flattened cylindrical shape flattened in the front-rear direction, the inversion deformation of the inner layer progresses smoothly in the inner layer withering deformation near the bottom. As the contents liquid is poured out, the inner layer's wrinkle deformation can be made to proceed smoothly and smoothly from the lower end of the bottom part to the shoulder part and then to the shoulder part. As the process proceeds smoothly, almost all of the content liquid can be used up.
In the above configuration of the present invention, the shape called “spherical arc shell” includes an elliptical arc shell shape, an elliptical arc shell shape, and the like. The bulging curved surface shape can be selected.

  Another configuration of the present invention is the main configuration described above, wherein the major axis and the minor axis of the flat cross-sectional shape are flat from the predetermined height position of the trunk portion to the bottom portion in the region from the predetermined height position of the trunk portion to the bottom portion. It is said that it is set as the structure which is gradually diameter-reduced toward.

  With the above-described configuration, the inner layer can be gradually and smoothly deformed from the bottom to the shoulder through the trunk.

Still another configuration of the present invention relates to the position of the intake hole, and in the main configuration described above, the intake hole is opened in the outer layer portion of the mouth tube portion.
Here, the air intake holes can be appropriately selected for the position and number of the air holes in consideration of the ease of wobbling and deformation of the inner layer, the appearance, the ease of secondary processing, and the cost. According to the configuration in which the intake hole is opened in the outer layer portion of the mouth tube portion, it is possible to make the appearance inconspicuous by attaching the pouring cap to the mouth tube portion, and if necessary, A check valve mechanism can be disposed in the intake hole.

  Still another configuration of the present invention also relates to the position of the intake hole, and the bottom seal portion formed on the bottom wall of the bottom portion at the time of blow molding is shaped like a bottom crack, and the outer seal layer and the inner layer are formed in this bottom seal portion. A gap is formed between them, and this gap is used as an intake hole.

According to the above configuration, the suction hole can be easily formed as a bottom crack by applying a mechanical pressing force or the like to the bottom seal portion where the outer layer and the inner layer are in close contact.
And since the bottom seal part is shaped like a bottom crack, the part formed on the bottom part of the parison at the time of blow molding can simply be sandwiched between the molds to make a cut-off shape, reducing the cost of the mold and producing It becomes possible to improve the property.
Further, the restriction by the outer layer at the bottom seal portion is eliminated, and the inner layer near the bottom can be more smoothly deformed.

  Still another configuration of the present invention relates to the use of the housing of the present invention. In the main configuration, a pour-out cap having a check valve function is assembled to the mouth tube portion, and an exterior body is mounted. It is said to be used as a refill container for a dispensing container.

In the above configuration, the casing (delami bottle) of the present invention can smoothly and smoothly advance the inner layer withering deformation from the bottom part to the shoulder part to the shoulder part even if the outer layer is relatively thin. Using this casing as a refill container, it is possible to suppress the deterioration of the quality of the good content liquid, to have good pouring properties, and to further save resources. A dispensing container can be provided.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described along examples with reference to the drawings.
FIGS. 1 to 3 show an embodiment of a delamination bottle according to the present invention. FIGS. 1 (a) and 1 (b) are a longitudinal front view and a perspective view near the bottom, and FIG. 2 is a longitudinal side view. 3A is a cross-sectional plan view taken along line AA in FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB.
In FIGS. 2 and 3A, symbols F, B, L, and R that define the front-rear and left-right directions of the housing 1 for convenience are shown.

(A) is a front view which longitudinally shows one Example of the housing of this invention, (b) is a perspective view of the bottom vicinity. It is a vertical side view of the housing shown in FIG. (A) is the AA line in FIG. 1, (b) is a plane sectional view shown along a BB line. (A) is sectional drawing which shows the lamination | stacking state of the outer layer and inner layer in the bottom seal part in FIG. 1, (b) is sectional drawing which shows the bottom crack state of a bottom seal part. (A) is a semi-vertical side view showing a conventional example of a delami bottle, and (b) is a perspective view in the vicinity of the bottom. FIG. 6 is a plan sectional view taken along line CC in FIG. 5.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described along examples with reference to the drawings.
1 to 3 show an embodiment of a housing that is a delamination bottle according to the present invention, and FIGS. 1 (a) and 1 (b) are a longitudinal front view and a perspective view of the vicinity of the bottom, FIG. 2 is a side view, 3A is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB.
In FIGS. 2 and 3A, symbols F, B, L, and R that define the front-rear and left-right directions of the housing 1 for convenience are shown.

This casing 1 is made by co-extrusion of an outer layer 11 made of low-density polyethylene resin and forming an outer shell, and an inner layer 12 made of nylon resin and forming an inner bag body 12a. It has a tapered cylindrical shoulder 3, a flat cylindrical trunk 4 and a bottom 5. In this embodiment, the average thickness of the outer layer 11 in the body 4 is 280 microns, and the average thickness of the inner layer 12 is 100 microns.
Further, an intake hole 21 for introducing external air between the outer layer 11 and the inner layer 12 is formed in the outer layer 11 portion of the mouth tube portion 2.
In addition, a bottom seal portion 22 is formed on the bottom portion 5 during blow molding.

  Here, after blow molding, in many cases, the outer layer 11 and the inner layer 12 are in close contact with each other, but when used as a delami bottle, the mouth tube portion 2 is formed so that the wrinkle deformation of the inner layer 12 proceeds smoothly. It is preferable that the inner bag body 12a is sucked by vacuum and the inner layer 12 is peeled off from the outer layer 11 in substantially the entire region.

1 and 2 show a state in which a dispensing cap 31 provided with a check valve mechanism using a ball valve is screwed and assembled to the mouth tube portion 2, and the dispensing cap 31 is thus attached to the housing 1. 31 can be assembled and used as a dispensing container.
Of course, the check valve mechanism disposed in the dispensing cap 31 is not limited to the ball valve, and various forms of check valve mechanisms can be employed.

  Moreover, the shape from the trunk | drum 4 to the bottom part 5 is a flat cylinder shape, The flat cross-sectional shape is a substantially ellipse shape as shown in FIG. Moreover, in the area | region from the upper end position (boundary position with the shoulder part 3) of the trunk | drum 4 to the bottom part 5, it is set as the shape which carries out the diameter reduction of the long diameter and short diameter of a flat flat cross-sectional shape gently.

  As shown in the perspective view of FIG. 1 (b), the bottom 5 has a shape that bulges downward in the shape of a spherical arc shell flattened in the front-rear direction, from the longitudinal front view of FIG. 1 (a). As can be seen from the front side F, the lower end of the bottom portion 5 has a shape that gently bulges downward in a curved shape.

The feature of the shape of the bottom portion 5 is clear when compared with the bottom portion 105 of the conventional case 101 shown in FIG. 5B. The bottom portion 105 shown in FIG. Whereas the bottom 5 of the above-described embodiment is formed from a bottom wall 105b formed substantially perpendicular to the side peripheral wall 105p, the bottom 5 in the above embodiment is distinguished from the side peripheral wall 105p and the bottom wall 105b of the conventional casing 101. , And the shape of the bottom portion 5 is such that the cross-sectional shape smoothly changes to a reduced diameter from the boundary with the body portion 4 to the lower end (center portion of the bottom surface).

Next, after filling the inner bag body 12a of the casing 1 of this embodiment with water, as shown in FIGS. 1 and 2, the dispensing cap 31 provided with the check valve mechanism is connected to the mouth tube portion. A dispensing container screwed to 2 was constructed, and this dispensing container was held in an inverted position, and a dispensing test of water as the content liquid was conducted.
As a result, in the case 1 of the present embodiment, the reverse deformation of the inner layer 12 can be smoothly advanced in the deflation deformation of the inner layer 12 in the vicinity of the bottom 5, and the deflation deformation of the inner layer 12 is accompanied with the pouring of water. Without any external force, and naturally, in order from the lower end of the bottom portion 5 to the shoulder portion 3 through the trunk portion 4, in a deformed manner as shown by a two-dot chain line in FIG. The content liquid was smoothly dispensed, and almost all of the content liquid could be dispensed except for a portion remaining in the vicinity of the mouth tube portion 2.

Good extraction results in the above test are:
Making the shape from the body part 4 to the bottom part 5 into a flat cylindrical shape,
In the region from the upper end position of the body portion 4 to the bottom portion 5, the long diameter and the short diameter of the flat cross-sectional shape of this flat tube are formed into a shape that gradually reduces the diameter,
And, combined with the action and effect of making the shape of the bottom portion 5 bulged into a spherical arc shell flattened in the front-rear direction facing downward, it was realized,
In particular, by making the shape of the bottom portion 5 bulge into a spherical arc shell that is flattened in the front-rear direction downward, it accompanies withering deformation of the inner layer 12 in the vicinity of the bottom portion 5 at the initial stage of pouring. The reversal deformation could progress smoothly.

Here, the casing 1 of the present embodiment has an average thickness of the outer layer 11 in the body portion 4 of 280 microns, which is thinner than a conventional Delami bottle, and can be used as a replacement container, a so-called refill container. is there.
Accordingly, when the casing 1 of this embodiment is used as a dispensing container, a dispensing cap 31 having a check valve function is detachably assembled to the mouth tube portion 2 as shown in FIGS. In addition to fixing, in order to ensure a stable self-standing posture of the container, it is used by being packaged with a relatively thick outer package (not shown).
Then, at the stage where the content liquid has been used, the dispensing cap 31 and the exterior body are repeatedly used, and the casing 1 newly filled with the content liquid is replaced and used.

  As mentioned above, although the synthetic resin casing of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example. For example, as for the combination of the outer layer and the inner layer, in addition to the combination of polyethylene / nylon, various combinations can be adopted in consideration of the peelability of both layers.

In addition, the casing of the present example is assumed to be used as a refill container, and the thickness of the outer layer in the body portion is relatively thin, about 280 microns. However, the casing is thick in consideration of the purpose of use and formability. Or it can be made thinner.
In addition, the bulging shape of the bottom is in the category of bulging into a spherical arc shell flattened in the front-rear direction toward the lower side. In consideration of formability, the selection can be made as appropriate while changing the degree of curvature of the spherical arc-shaped curved surface.

Moreover, although the example which forms the inlet hole 21 in the port cylinder part 2 was shown in the present Example, the inlet hole 21 can also be formed using the bottom seal part 22 formed in the bottom face of a bottom part at the time of blow molding. . 4A is a cross-sectional view showing a laminated state of the outer layer 11 and the inner layer 12 in the bottom seal portion 22 surrounded by a small circle in FIG.
The outer layer 11 is peeled off from the inner layer 12 by applying a pressing force to the bottom seal portion 22 from the outside, so that a so-called bottom cracking state can be formed and a gap can be formed. can do.
Here, the opening position of the intake hole 21 can be selected as appropriate, and may be the mouth tube portion 2 as in the embodiment or the bottom surface of the bottom portion 5 as described above. Furthermore, you may open in both the mouth tube part 2 and the bottom part 5 bottom face.

As described above, the synthetic resin blow-molded casing, which is the Delami bottle of the present invention, can smoothly and sufficiently progress withering deformation of the inner layer in the vicinity of the bottom without being affected by external force as the content liquid is poured out. In particular, it can be expected to be widely used as a container body of a dispensing container for cooking seasonings and the like mainly composed of a low-viscosity liquid such as water.

DESCRIPTION OF SYMBOLS 1,101; Housing 2,102: Mouth tube part 3,103; Shoulder part 4,104; Trunk part 5,105; Bottom part 11,111; Outer layer 12,112; Inner layer 12a, 112a; Hole 22; seal part 31; pouring cap L; content liquid

Claims (4)

Shoulders from the upper end of the tubular body portion (4) (3) standing set mouth tube section (2) via a layer (11) forming an outer shell, freely peeled off the outer layer (11) A synthetic resin blow-molded casing formed by a blow molding method in which two types of synthetic resin materials are coextruded with an inner layer (12) that is laminated and forms an inner bag body (12a) that can be deformed by warping. ,
A predetermined position of the outer layer (11), opened an intake hole (21) for introducing external air between the layers of the outer layer (11) and the inner layer (12), a bottom portion from the body portion (4) (5 the shape of the subjected) flat cross-sectional shape and flattened squamous tubular in the longitudinal direction, while the curved surface shape toward selfish swelling the bottom shape of (5) it down the predetermined body portion (4) In the region from the height position to the bottom (5), the long diameter and short diameter of the flat cross-sectional shape of the flat shape is gradually reduced from the predetermined height position of the trunk portion (4) toward the bottom (5) A blow molded casing made of synthetic resin, characterized in that Mouth tube section (2) synthetic resin blow molded bottle of claim 1 Symbol placement opened a suction hole (21) in the outer layer portion of the. The bottom seal part (22) is formed in a bottom crack shape in the outer layer part of the mouth tube part (2) , a gap is formed between the outer layer (11) and the inner layer (12) in the bottom seal part (22) , and the gap is sucked hole (21) and claims 1 Symbol placement synthetic resin blow molded bottle body. Pouring cap (31) and only assembled Rutotomoni having a check valve function to the mouth tube section (2), equipped with exterior body, according to claim 1, 2 or 3, wherein the use as a refill container dispensing container Synthetic resin blow molded housing.

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