JP6278302B2 - Blow molding container - Google Patents

Description

  In the present invention, a collapsible, volume-reducible and deformable inner layer that accommodates the contents is laminated in the outer layer forming the outer shell so as to be peelable, and the contents can be poured out without sucking outside air into the inner layer. The present invention relates to a blow-molded container called a delamination container (delami bottle).

  In the Delami bottle, as the contents are poured out, the inner layer is crushed and deformed while peeling from the outer layer, but the inner layer is a simple crushed deformation due to the atmospheric pressure of the inner layer. Therefore, the crushing deformation form cannot be predicted, and the inner layer portion that crushes and deforms in a substantially intimate state over the entire width range increases, so that it is difficult to pour out the contents. .

  As a means to eliminate this inconvenience, a thin vertical belt-like adhesive layer that bonds the outer layer and the inner layer over the entire height range of the Delami bottle is provided, and a part of the inner layer is adhered and fixed to the outer layer by this adhesive layer. Then, there are those which regulate the crushing deformation form of the inner layer, and by this restriction, the crushing deformation in the substantially close contact state of the inner layer part is difficult to occur and it is difficult to pour out the contents. .

  Although this can certainly prevent the inner layer portion from being crushed and deformed in a substantially tight contact state, the deformation regulation of the inner layer by one adhesive layer is not always sufficient, so if the delamination phenomenon proceeds, There are many places where the parts are crushed and deformed due to the rules, which causes a new inconvenience that poor dispensing occurs.

  As a conventional technique for eliminating this inconvenience, there is a technique in which a pinching portion that holds a part of the inner layer in a sandwiched manner with a part of the outer layer is provided in a vertical ridge shape at an axially symmetric position with respect to the adhesive layer (for example, a patent) FIG. 7 of Literature 1).

JP 2012-46206 A

  According to this prior art, the sandwiching portion works as an adhesive layer, thereby making it possible to regulate the deformation deformation of the inner layer to be almost constant, thereby eliminating the occurrence of defective dispensing of contents.

  However, in the above-described conventional technology, the sandwiching portion is provided only in the trunk portion, and the inner layer may peel to the mouth tube portion, which is a delamination phenomenon that occurs within a certain regulation range in the trunk portion. There is. And if the inner layer of the mouth tube part is peeled off, it cannot be used as a delamination bottle, and there is a problem that it becomes a poor dispensing.

  In particular, the delamination bottle is subjected to an initial delamination process after the formation of the intake hole, and this initial delamination process is performed by flowing a predetermined amount of air from the intake hole or by vacuuming the air in the container from the mouth tube part A part or all of the inner layer is peeled off from the outer layer, and then air is press-fitted from the mouth tube portion to return the inner layer to the original state and adhere to the outer layer. Therefore, in the case where the sandwiching portion is provided only in the body portion, the same problem as described above may occur due to the peeling of the inner layer reaching the mouth tube portion during the initial delamination process.

  Therefore, the present invention was devised to solve the above-described problems in the prior art, and in a blow molded container in which the inner layer is crushed and deformed while being peeled from the outer layer in accordance with the use of the content, the content is poured. An object of the present invention is to create a blow-molded container that enables a stable dispensing operation of the contents by preventing the peeling of the body portion from reaching the mouth tube portion at the time of out-use and initial delamination processing.

Of the means for solving the above problems, the main configuration of the present invention is as follows.
It has a form that has a mouth tube part erected on the upper end of the shoulder part that extends upward from the bottom part through the cylindrical body part, and is peeled off to the outer layer that forms the outer shell with shape retention and the inner surface of the outer layer A blow-molded container configured to have an inner layer that can be crushed and volume-reduced and deformed in a state in which the contents are accommodated and can be freely collapsed,
While holding a part of the inner layer at the bottom, a suction hole for taking in the outside air by punching a part of the outer layer in the mouth tube part and a first holding part for holding a part of the inner layer by holding a part of the outer layer , Provided at two positions that are offset by 90 degrees in the circumferential direction and are axially symmetrical with each other ,
The first sandwiching portion is formed of a pair of rib pieces that are polymerized by sandwiching a corresponding portion of the parison with a mold, and a plurality of biting portions that bite into the other from one of the pair of rib pieces are disposed; The height position of the uppermost biting portion of the first sandwiching portion is formed at the same position as the intake hole or at a position above the intake hole .

In the blow molded container having the above-described configuration, the first sandwiching portion is formed in the mouth tube portion, and a part of the inner layer is sandwiched and held by a part of the outer layer, whereby the inner layer is peeled from the outer layer. It is possible to prevent the peeling of the body portion from reaching the mouth tube portion.
Further, the inner layer can be more firmly held by the outer layer in the mouth tube portion.
Further, since the biting portion exhibits extremely strong resistance against the slipping of the inner layer portion from between the outer layer portions constituting the pair of rib pieces constituting the sandwiching portion, the inner layer is firmly held in the sandwiching portion and It can be achieved stably.
Further, it is possible to more reliably achieve prevention of peeling at the mouth tube portion, particularly prevention of peeling at the tip portion of the mouth tube portion.

According to another aspect of the present invention, in the configuration described in claim 1, a second sandwiching portion that holds a part of the inner layer with a portion of the outer layer is provided at the bottom, and the second sandwiching portion is flattened. The direction is set to be the same direction as the direction in which the first sandwiching portion is flattened .

  In the above configuration, the biting portion exhibits an extremely strong resistance to the inner layer portion coming out from between the outer layer portions constituting the pair of rib pieces constituting the clamping portion. The inner layer can be retained firmly and stably.

  Another configuration of the present invention is obtained by adding the biting direction of the biting portion to the above configuration alternately.

  In the above configuration, since the biting directions of the adjacent biting portions are opposite, the outer layer and the inner layer in the vicinity are forcedly pulled and deformed greatly when deformed, so the outer layer and the inner layer are deformed. And the outer layer and the inner layer are more strongly pressure-bonded, thereby strengthening the pressure-bonding as a whole.

  Further, since the biting portions are alternately positioned on the opposite side with respect to the main portion of the crimping surface, the plurality of biting portions cause both rib pieces to mesh with each other on both sides of the main portion of the crimping surface. Is structurally enhanced.

According to another aspect of the present invention, a longitudinal belt-like adhesive layer that adheres the outer layer and the inner layer over the entire height range to the configuration according to any one of claims 1 to 3 is positioned axially symmetrically. Is added to that.

  In the above configuration, since the pair of adhesive layers opposed to each other in an axially symmetrical manner function as immovable portions, the deformation of the inner layer following the dispensing of the contents is performed in a state regulated by the pair of adhesive layers. Is called. That is, the inner layer is basically crushed and deformed in a form of being crushed from the vertical direction with respect to a plane imaginary between a pair of adhesive layers facing each other. In this way, by restricting the basic directionality of the inner layer crushing deformation, the inner layer crushing deformation proceeds with regularity, thereby making it easy to secure a passage for the contents.

According to another aspect of the present invention, there is provided a single longitudinal belt-like adhesive layer that adheres the outer layer and the inner layer over the entire height range to the configuration according to any one of the first to third aspects. It is provided that a third sandwiching portion that sandwiches and holds a part of the inner layer with a part of the outer layer is provided at an axially symmetric position with the adhesive layer of the body portion.

  In the above configuration, since the adhesive layer and the sandwiching portion positioned symmetrically function as an immovable portion, the inner layer basically has a virtual plane between the adhesive layer and the sandwiching portion facing each other. Thus, the inner layer is crushed and deformed in the form of being crushed from the vertical direction, and the crushing deformation of the inner layer proceeds with regularity in the same manner as described above, so that a passage for the contents can be easily secured. In addition, since the sandwiching part is a part of the outer layer that holds a part of the inner layer in a sandwiched manner, it can be easily molded using a container molding die having a split mold structure. .

According to another aspect of the present invention, in the configuration according to any one of the first to third aspects, a part of the inner layer is sandwiched and held by a part of the outer layer at an axially symmetric position of the body part. This is to add that the third clamping parts are arranged in a column.

  Even in this configuration, as in the above configuration, it is possible to regulate the basic direction of crushing deformation of the inner layer and to proceed the crushing deformation of the inner layer with regularity, so that the passage of contents is It becomes easy to secure, and it is possible to easily form the sandwiching portion by using a container molding die having a split mold structure.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the case of the delamination phenomenon in which the inner layer is crushed and deformed while peeling from the outer layer according to the use of the contents being poured out, or during the initial delamination process, there is no possibility that the peeling of the body part will reach the mouth tube part. Stable use is possible, and the occurrence of poor dispensing can be suppressed.

  Further, the biting portion formed in the pair of rib pieces constituting the sandwiching portion exhibits extremely strong resistance against the inner layer portion coming out from between the outer layer portions, so that the inner layer is held more firmly in the sandwiching portion. And can be achieved stably.

It is a front view which shows the delami bottle as an Example of the blow molding container of this invention. It is a side view of a delami bottle. It is a top view of a delami bottle. It is a partial front view which expands and shows the principal part of a delami bottle. It is a plane sectional view in the VV line of FIG. It is sectional drawing which expands and shows a clamping part.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a front view showing a delami bottle as an embodiment of the blow molded container of the present invention, FIG. 2 is a side view of the delami bottle, FIG. 3 is a plan view of the delami bottle, and FIG. 4 is a partial front view showing an enlarged main part of the delami bottle. 5 is a cross-sectional plan view taken along line VV in FIG. 1, and FIG. 6 is an enlarged cross-sectional view of the holding portion.

  The delamination bottle of the present invention (hereinafter referred to as “container 1” as appropriate) is an outer layer 2 formed of a synthetic resin material such as polyethylene or polypropylene and having a necessary self-shape holding ability (also referred to as shape-retaining property). And a synthetic resin material having low compatibility with the outer layer 2 such as nylon, ethylene vinyl alcohol copolymer, etc., and a blow formed by laminating (see FIG. 2) an inner layer 3 formed into a bag shape that can be flexibly deformed. It is a molded container.

  The container 1 includes a circular bottom portion 4 and a cylindrical body portion 5 continuously provided on the bottom portion 4, and further, a shoulder portion 6 that extends downwardly through the body portion 5 in a reduced-diameter shape. A mouth tube portion 7 is erected on the upper end. A screw 7a to which a cap (not shown) is screwed is formed on the upper portion of the outer peripheral surface 7A of the mouth tube portion 7, and the outer layer 2 and the inner layer 3 receive external air in the outer layer 2 portion constituting the lower outer peripheral surface 7A. An intake hole 8 is formed for introduction between the two. The intake holes 8 are formed at two positions on the outer peripheral surface 7A that are axisymmetric.

  Further, a pair of depressed portions 7B and 7B are formed at two positions on the outer peripheral surface 7A that are 90 degrees in the circumferential direction from the intake hole 8 and that are axially symmetrical with each other, and the first sandwiched portions in both the depressed portions 7B are formed. The portions 9 are formed in a state where they remain. When the parison is blow-molded into the container 1, the first sandwiching portion 9 directly forms a pair of rib pieces 9 a obtained by crushing a corresponding portion corresponding to the mouth tube portion 7 of the parison flatly from the front and rear. It is formed into a protruding rib shape by polymerization pressure bonding.

  The first sandwiching portion 9 has a plurality (three in this embodiment) of recessed holes 11 that form a biting portion 10 that bites from one rib piece 9a into the other rib piece 9a, rather than the thickness of the rib piece 9a. A large depth is formed in a column by alternately inverting the depression direction.

  And since these 1st clamping parts 9 and biting parts 10 stop progress of peeling, the inner layer 3 of the mouth tube part 7 which is the upper end of the container 1 is firmly hold | maintained by the outer layer 2. FIG.

  On the bottom part 4, a second clamping part 12 having the same configuration as that of the first clamping part 9 is formed so as to cross the center of the bottom wall 4A. That is, the second sandwiching portion 12 is formed into a ridge shape by superposing and pressing the pair of rib pieces 15 obtained by crushing the parison flatly from the front and the back and cutting it away. The pair of rib pieces 15 have a recessed hole 17 that forms a biting portion 16 that bites into the other rib piece 15 from one rib piece 15 at a depth larger than the thickness of the rib piece 15. The rows are formed by alternately inverting the directions. And the inner layer 3 of the bottom part 4 which is the lower end of the container 1 is firmly hold | maintained by the outer layer 2 by these 2nd clamping parts 12 and biting parts.

  Thus, in the present invention, not only the configuration having the second clamping portion 12 at the bottom 4 on the lower end side of the container 1 but also the configuration having the first clamping portion 9 at the mouth tube portion 7 on the upper end side. The inner layer 3 can be reliably held at both ends in the height direction, that is, at both the lower end (bottom portion 4) and the upper end (mouth tube portion 7). For this reason, when the delamination phenomenon occurs according to the use of the contents being poured out or during the initial delamination process, the inner layer 3 is peeled off from the outer layer 2 only at the portion of the body portion 5 and is prevented from reaching the mouth tube portion 7. be able to. Therefore, the container 1 can be used as a delami bottle, and the occurrence of poor dispensing can be suppressed.

  The formation position in the height direction of the mouth tube portion 7 of the first clamping portion 9 is the same as or higher than the formation position of the intake hole 8. More specifically, the formation position of the uppermost recessed hole 11 forming the biting part 10 provided in the first clamping part 9 is the same position as the intake hole 8 or a position above it as in the present embodiment. It is formed to become. Thereby, it can prevent more reliably that peeling of the inner layer 3 in the trunk | drum 5 part reaches the mouth tube part 7. FIG.

  Further, by attaching a cap (not shown) to the mouth tube part 7, the first holding part 9 can be made invisible from the outside, so that it is possible to maintain the external appearance at the time of selling the product. .

  As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example.

  For example, in the above-described embodiment, the container 1 that does not have the configuration for holding the outer layer 2 and the inner layer 3 in the body portion 5 is shown and described. However, the present invention is not limited to this, and the axially symmetric position of the container 1 is described. The outer layer 2 and the inner layer 3 may be bonded to each other over the entire height range by means of a longitudinal belt-like adhesive layer disposed on the outer wall, and the outer layer and the inner layer are adhesively bonded over the entire height range of the container 1. The container 1 may be provided with one thin vertical belt-like adhesive layer, and a third sandwiching portion that sandwiches a part of the inner layer with a part of the outer layer in an axially symmetric position with the adhesive layer. Or the container 1 provided with such a 3rd clamping part in both positions used as the axial symmetry of a trunk | drum may be sufficient, respectively.

  The blow-molded container of the present invention has an outer layer forming an outer shell laminated with a collapsible, volume-reducible and deformable inner layer in a peelable manner, so that the content can be poured without sucking outside air into the inner layer. Application development in the Delami bottle field that enables out-use can be achieved in a wider area.

1: Blow molded container (container)
2: Outer layer 3: Inner layer 4: Bottom part 4A: Bottom wall 5: Body part 6: Shoulder part 7: Mouth tube part 7A: Outer peripheral surface 7B: Depression part 7a: Screw 8: Intake hole 9: First clamping part 9a: Rib piece 10: biting part 11: recessed hole 12: second clamping part 15: rib piece 16: biting part 17: recessed hole

Claims (6)

It has a form having a mouth tube portion (7) erected on the upper end of a shoulder portion (6) extending upward from the bottom portion (4) through a cylindrical body portion (5), and has an external shape retaining property. An outer layer (2) that forms a shell, and an inner layer (3) that is detachably laminated on the inner surface of the outer layer (2) and that can be freely crushed and reduced in volume while containing contents. A blow molded container,
A part of the inner layer (3) is held at the bottom (4), and a part of the outer layer (2) is perforated in the mouth tube part (7) to take in outside air and the intake hole (8) The first sandwiching part (9) that sandwiches and holds a part of the inner layer (3) with a part of the outer layer (2) is shifted by 90 degrees in the circumferential direction and is in two axially symmetric positions. In each position ,
The first clamping part (9) is formed of a pair of rib pieces (9a) polymerized by clamping a corresponding part of the parison with a mold, and from one of the pair of rib pieces (9a) to the other A plurality of biting portions (10) for biting are provided, and the height position of the uppermost biting portion (10) of the first clamping portion (9) is the same position as or higher than the intake hole (8) A blow-molded container, characterized in that it is formed at the position .   The bottom (4) is provided with a second clamping part (12) that holds a part of the inner layer (3) with a part of the outer layer (2), and the direction in which the second clamping part (12) is flattened is flat. The blow-molded container according to claim 1, wherein the blow-molded container is set to be in the same direction as the direction in which the first clamping part (9) is flattened. The blow molded container according to claim 1 or 2 , wherein the biting direction of the biting portion (10) is alternately reversed. The blow-molded container according to any one of claims 1 to 3 , wherein a longitudinal belt-like adhesive layer that adheres the outer layer (2) and the inner layer (3) over the entire height range is disposed in an axially symmetric position. One longitudinal belt-like adhesive layer that bonds the outer layer (2) and the inner layer (3) over the entire height range is provided, and the outer layer (2 4) A blow molded container according to any one of claims 1 to 3 , further comprising a third sandwiching portion that sandwiches and holds a part of the inner layer (3) with a part of the inner layer (3). Axially symmetrical positions of the body (5), according to claim 1 to 3 were arranged a third clamping portion a plurality of holding sandwich a portion of the inner layer (3) in a portion of the outer layer (2) in tandem form The blow molded container according to any one of the above.

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