JP5565838B2 - Blow molding container - Google Patents

Description

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

  In the case of a delami bottle, a delami phenomenon occurs in which the inner layer is crushed and deformed away from the outer layer as the contents are poured out. This delamination phenomenon occurs from the upper side to the lower side of the inner layer due to the weight of the contents. Proceed toward.

  Since the delamination phenomenon in the inner layer is a simple crushing deformation due to the atmospheric pressure of the inner layer, the crushing deformation form cannot be predicted, and the inner layer portion that crushes and deforms in a substantially coherent state over the entire width range increases. Therefore, the inconvenience that it becomes difficult to pour out the contents occurs.

  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 is a type that regulates the deformation deformation mode of the inner layer, and this restriction prevents the inner layer portion from being crushed and deformed in a substantially intimate contact state, thereby preventing the content from being easily poured out. .

  Although this can certainly prevent the inner layer portion from being crushed and deformed in a substantially tight contact state, the deformation regulation on 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.

  The present applicant has already proposed a blow molded container for solving this disadvantage. (See Patent Document 1)

  The container of the above-mentioned patent document 1 has a shoulder on the upper end of a bottomed cylindrical body, in which an outer layer that forms an outer shell and a collapsible and volume-reducible deformable inner layer that accommodates contents are detachably stacked. A bottle-shaped blow-molded container in which a mouth tube portion is continuously provided, a single vertical belt-like adhesive layer that bonds the outer layer and the inner layer over the entire height range, and the central axis of the trunk portion On the other hand, in the axially symmetric position with the adhesive layer, a pinching part that holds a part of the inner layer sandwiched by a part of the outer layer is provided in a vertical ridge shape, and an intake hole is opened in the outer layer part avoiding the adhesive layer It is equipped with the structure to do.

JP 2007-091280 A

  The container described in Patent Document 1 regulates the basic directionality of the inner layer crushing deformation, so that the inner layer crushing deformation proceeds with regularity, thereby easily ensuring the passage of the contents. It is an excellent one that can prevent the occurrence of inconvenience that the content dispensing becomes defective as the delamination progresses, but the sandwiching part is formed by post-processing after blow molding There was still room for improvement in the locking force of the inner layer in the clamping part.

  The present invention has been made in view of the above points, and the locking means at the position opposite to the adhesive layer can exert a greater clamping strength, so that the content can be stably dispensed to the end regardless of the progress of the delamination phenomenon. The present invention proposes a blow-molded container that can more reliably achieve the purpose of obtaining an operation.

The first means is configured as follows. That is, the neck and neck portion 12 is erected from the bottomed cylindrical body portion 10 through the shoulder portion 11, and has an outer layer o having shape retention and an inner layer i that is detachably laminated on the inner surface of the outer layer o. A vertical belt-like adhesive layer 20 that is configured and adheres the outer layer o and the inner layer i over the entire height range, and an outside air introduction hole 50 is formed in the outer layer o portion avoiding the adhesive layer 20; A concave portion 30 is formed in which the trunk portion 10 is recessed inward, and the inner layer i is fused to the center portion of the concave portion 30 in an axially symmetric position with the adhesive layer 20 with respect to the central axis of the trunk portion 10. In this state, a plate-like fusion part 40 is provided that protrudes the outer layer o and the inner layer i, and the plate-like fusion part 40 sandwiches the plate-like fusion part corresponding part 40 a of the parison 60 by the mold 70. In a blow molded container formed by blow molding,
By positioning the outer edge of the plate-like fusion part 40 inward from the opening edge, the concave part 30 was formed as a concave part 30 that penetrates the rear part of the body part 10.

The second means is configured as follows. That is, in the first means, the plate-like fusion part 40 is configured by providing the biting part 41 that bites into the other from one of the pair of outer layers o forming the plate-like fusion part 40.

The third means was configured as follows. That is, in any one of the first means and the second means, the plate-like fusion part 40 is provided at the upper height position of the body part 10.

The fourth means is configured as follows. That is, in any one of the first to second means, the plate-like fusion part 40 is provided at a substantially central height position of the body part 10.

The fifth means is configured as follows. That is, in any one of the first means and the second means, a plurality of plate-like fusion parts 40 are formed along the height direction of the body part 10.

  According to the present invention, the concave portion 30 in which the trunk portion 10 is recessed inward is formed, and the inner layer is formed in the central portion of the concave portion 30 that is axially symmetrical with the adhesive layer 20 with respect to the central axis of the trunk portion 10. i is provided with a plate-like fusion portion 40 in which the outer layer o and the inner layer i protrude from each other in a fused state, and the plate-like fusion portion 40 is made of a plate-like fusion portion corresponding to the plate-like fusion portion 40a of the parison 60. Since it is formed by blow molding in a state of being sandwiched by the mold 70, the close contact between the plate-like fused portion 40 and the inner layer i and the outer layer o is great, and the inner layer i is peeled off from the outer layer o due to a decrease in the amount of liquid contained. In the plate-like fused portion 40 portion, the sufficient locking effect of both can be exhibited, and inconveniences such as peeling of both at that portion can be prevented as much as possible, and better discharge properties can be maintained. In addition, unlike the conventional case, the plate-like fused portion 40 is formed at the time of blow formation unlike the case where the clamping portion is formed by post-processing, so the plate-like fused portion 40 is stored in the back of the recessed portion 30. In this state, the influence from external force is extremely reduced.

  Further, as the contents are poured out, the inner layer i is crushed and deformed, since the adhesive layer 20 and the plate-like fusion part 40 positioned in an axial symmetry are immobile parts. The crushing deformation of the inner layer i proceeds in a regular manner with respect to the imaginary plane on which is positioned, and the crushing deformation of the inner layer i proceeds with regularity, thereby securing the passage of the contents. As for the point which becomes easy, it is as usual.

  Further, since the plate-like fusion portion 40 is formed by blow molding in a state where the plate-like fusion portion corresponding portion 40a of the parison 60 is sandwiched between the molds 70, using the container molding die, It can be easily molded.

  Further, when the recessed portion 30 is the recessed portion 30 that passes through the rear portion of the body portion 10, in addition to the above effects, the opening area of the recessed portion 30 can be formed as small as possible, and the appearance is good and the appearance is improved. It also has the advantage of ensuring a large decorative area. In addition, the plate-like fusion part 40 has an advantage that it is not affected by external force at all.

  Since the plate-like fusion part 40 protrudes into the recessed part 30 recessed in the body part 10, so that the outer edge of the plate-like fusion part 40 is positioned inward from the opening edge of the depression part 30. Since it is protruding, the plate-like fusion part 40 does not get in the way, and external force, for example, a finger contacts when the body part 10 is squeezed, etc. in the plate-like fusion part 40 Inconveniences such as a force acting to peel the outer layer o and the inner layer i can be prevented as much as possible.

  Further, when the plate-like fusion portion 40 is configured by providing the biting portion 41 that bites into the other from one of the pair of outer layer o portions forming the plate-like fusion portion 40, The outer layer o and the inner layer i are more firmly joined to each other, and the peeling of the two at the plate-like fused portion 40 can be further reliably prevented.

  When the plate-like fusion part 40 is provided at the upper height position of the body part 10, the body part 10 in the lower part can be easily squeezed, and the handling of that point becomes easy.

  When the plate-like fusion part 40 is provided at a substantially central height position of the body part 10, even if the plate-like fusion part 40 is provided at one place, the outer layer o is balanced in the body part 10. The inner layer i can be peeled off.

  When a plurality of the plate-like fusion parts 40 are formed along the height direction of the body part 10, since a plurality of fixing points of the inner layer i are provided, the regularity is further improved in the body part 10 more evenly. The inner layer i can be peeled from the outer layer o.

It is a perspective view of a blow molding container. Example 1 It is a side view of a blow molding container. Example 1 FIG. 3 is a transverse sectional view taken along line XX in FIG. 2. Example 1 It is explanatory drawing at the time of blow molding. Example 1 It is a side view of a blow molding container. (Example 2) It is a side view of a blow molding container. (Example 3) It is a cross-sectional view of the trunk portion of the blow molded container. Example 4 It is a principal part expanded horizontal sectional view of FIG. Example 4 It is a perspective view of a blow molding container. (Example 5) It is a side view of a blow molding container. (Example 5) FIG. 11 is a transverse sectional view taken along line YY in FIG. (Example 5) It is explanatory drawing at the time of blow molding. (Example 5)

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show an example of a blow molded container 1. The blow-molded container 1 has a mouth-and-neck portion 12 erected from a trunk portion 10 through a shoulder portion 11. As shown in FIG. 3, the blow-molded container 1 is composed of a squeezable outer layer o having shape retention and an inner layer i that is detachably laminated on the inner surface of the outer layer o. The inner layer i is flexible. It has sex.

  In addition, one vertical belt-like adhesive layer 20 is provided vertically between the outer layer o and the inner layer i. The adhesive layer 20 achieves the initial purpose if it is in the part from the lower end of the body part 10 to the upper end of the mouth-and-neck part 12 through the shoulder part 11, but in this example, it reaches the center of the bottom part of the body part for convenience of molding. Part is formed. Therefore, the adhesive layer 20 may be a vertical belt that adheres over the entire height range.

  Further, the upper part of the body part 10 is provided with a recessed part 30 and a plate-like fusion part 40. As shown in FIGS. 1 to 3, the recessed portion 30 has a shape in which a part of the body portion 10 is recessed inward, and the recessed portion 30 is recessed at the axial target position with respect to the central axis of the body portion 10. The shape is not particularly limited as long as it can be stored so that the outer edge of the plate-like fusion portion 40 is located inward of the opening edge.

  The plate-like fused portion 40 protrudes into the recessed portion 30 with the outer layer o and the inner layer i protruding so that the outer edge is located inward from the opening edge of the recessed portion 30 and the inner layer i being fused together. Has been established. The plate-like fusion part 40 is provided so as to protrude axially symmetrically with the adhesive layer 20 with respect to the central axis of the body part 10.

  Further, the plate-like fusion part 40 is formed at the time of blow molding of the blow-molded container 1 rather than post-processing. That is, molding is performed using the parison 60 at the time of blow molding, and at that time, as shown in FIG. 4, for example, clamping concave portions 72 for clamping the plate-like fusion portion corresponding portions 40a are respectively provided at predetermined positions. The blow molded container 1 having the sandwiched portion as the plate-like fused portion 40 is formed by blow molding with the pair of molds 70 and 70 sandwiching the plate-like fused portion corresponding portion 40a of the parison 60. be able to. The recessed portions 30 and the plate-like fusion portions 40 are not limited to being provided above the body portion 10 as will be described later, and the number of the recessed portions 30 and the plate-like fusion portions 40 is not limited to one and may be plural.

  In addition, an outside air introduction hole 50 is formed in the outer layer o of the mouth / neck portion 12. The outside air introduction hole 50 is for introducing outside air into the gap where the inner layer i is peeled off from the outer layer o when the content liquid is reduced. In this example, the outside air introduction hole 50 is provided in the outer layer o of the mouth-and-neck portion 12, but this is not limitative. However, the outer layer o other than the portion where the adhesive layer 20 is formed can be drilled.

  When the blow molded container 1 configured as described above is used, for example, a nozzle (not shown) is attached to the mouth / neck portion 12, and the body portion 10 is squeezed to discharge the stored liquid. . In that case, the inner layer i is peeled off from the outer layer o and the volume of the inner layer i is reduced with a decrease in the stored liquid, so that the liquid can be stored and discharged in the inner layer i without intrusion of air or the like. Further, along with the decrease in the stored liquid, outside air is introduced from the outside air introduction hole 50 between the peeled inner layer i and outer layer o. Of course, it is possible to use a pump instead of the nozzle.

  When the inner layer i is peeled, the inner layer i is crushed and deformed in order from the upper side. However, since the inner layer i is crushed and deformed, the adhesive layer 20 and the plate-like fusion part 40 positioned in an axial symmetry are immobile parts. This is performed in a state of being restricted by the layer 20 and the plate-like fusion part 40. That is, since the inner layer i uses the adhesive layer 20 and the plate-like fusion part 40 as immovable portions, basically, the inner layer i is on a virtual plane where the adhesion layer 20 and the plate-like fusion part 40 are located. On the other hand, it will be crushed and deformed in the form of being crushed from the vertical direction. In this way, by restricting the basic direction of the crushing deformation of the inner layer i, the crushing deformation of the inner layer i proceeds with regularity, thereby making it easy to secure a passage for the contents. Moreover, the above-described configuration of the plate-like fusion portion 40 increases the peel strength between the inner layer i and the outer layer o in this portion, and there is no possibility that the inner layer i in this portion is peeled off from the outer layer o by the liquid pouring operation. Further, since the plate-like fusion part 40 is located above the body part 10, there is an advantage that the body part 10 can be easily squeezed without contacting the plate-like fusion part 40 part.

  FIG. 5 shows another example. In this example, the recessed portion 30 and the plate-like fusion portion 40 are provided at a substantially central height position of the body portion 10. In this case, the peeling state of the inner layer i on the plate-like fusion part 40 side can be performed more evenly in the vertical direction. Other configurations and operations are the same as those in the example of FIG.

  FIG. 6 shows still another example. In this example, a plurality of recessed portions 30 and plate-like fusion portions 40 are formed along the height direction of the body portion 10. In this case, since there are a plurality of locking points of the inner layer i by the plate-like fusion part 40, a more even peeled state appears. Other configurations and operations are the same as those in the example of FIG.

  7 and 8 show another example of the plate-like fusion part 40, and a bite-like fusion part 41 that bites from one of the pair of outer layers o forming the plate-like fusion part 40 to the other is provided. The landing part 40 is configured. In this case, the bonding of the outer layer o and the inner layer i at the plate-like fusion part 40 portion becomes stronger, and the inner layer i from the outer layer o at the plate-like fusion part 40 portion can be more firmly prevented from coming out. Is possible. The configuration of the biting portion 41 can be adopted in the above embodiments and the following embodiments.

  FIGS. 9 to 11 show still another example, in which the recessed part 30 is configured as a recessed part 30 that crosses the rear part of the body part 10. Also in this case, the plate-like fusion part 40 is formed at the time of blow molding of the blow molded container 1 instead of post-processing as in the above examples. In other words, the parison 60 is molded during blow molding, and at this time, for example, as shown in FIG. 12, a plate-like fusion of the parison 60 is performed by a pair of molds 70 and 70 each having a pin-like projection 71 protruding therefrom. By performing blow molding in a state where the portion corresponding portion 40a is sandwiched, the blow molded container 1 having the sandwiched portion as the plate-like fusion portion 40 can be formed. At the tip of each pin-like protrusion 71, 71, a holding recess 72 for holding the plate-like fused portion corresponding portion 40a is provided. When blow molding, the upper and lower wall parts bulge at the rear position of each pin-shaped protrusion 71, 71, and as shown in FIG. 9, the front and rear symmetrical surface shape (except for the recessed part) appears. it can. The boundary 73 between the upper and lower bulging portions is at least in contact with or fused. Other configurations and operations are the same as those in the example of FIG.

  Note that the recessed portion 30 and the plate-like fused portion 40 in this example are not limited to being provided above the trunk portion 10 as in this example, but are, for example, at a substantially central height position of the trunk portion 10 as in the example of FIG. Further, the number may be provided, and the number is not limited to one but may be plural.

1 ... Blow molded container
10 ... trunk, 11 ... shoulder, 12 ... mouth and neck o ... outer layer i ... inner layer
20 ... adhesive layer,
30 ... depression
40… Plate-like fusion part
40a ... Corresponding part of plate-like fusion part
41 ... bite
50… Outside air introduction hole
60 ... Parison
70 ... Mold
71… Pin-shaped protrusion
72 ... Recess for clamping
73 ... Sakai

Claims (5)

Formed with the neck and neck (12) standing up from the bottomed cylindrical body (10) through the shoulder (11), peeling off the shape-retaining outer layer (o) and the inner surface of the outer layer (o) A longitudinal belt-like adhesive layer (20) is provided, which is composed of an inner layer (i) that can be laminated, and bonds the outer layer (o) and the inner layer (i) over the entire height range. 20), an outside air introduction hole (50) is formed in the outer layer (o), avoiding the formation of a recess (30) in which the body (10) is recessed inward, and the body (10) The outer layer (o) and the inner layer (i) are projected in a state where the inner layer (i) is fused to the central portion of the adhesive layer (20) and the recessed portion (30) in an axially symmetric position with respect to the central axis. The plate-like fusion part (40) is provided, and the plate-like fusion part (40) is a state in which the plate-like fusion part corresponding part (40a) of the parison (60) is held by the mold (70). In blow-molded container formed by blow molding,
By positioning the outer edge of the plate-like fusion part (40) inward from the opening edge, the concave part (30) is a concave part (30) that penetrates the rear part of the trunk part (10). A blow molded container. The blow according to claim 1, wherein the plate-like fusion part (40) is configured by providing a biting part (41) that bites into one of the pair of outer layers (o) forming the plate-like fusion part (40). Molded container. The blow molded container according to any one of claims 1 to 2 , wherein the plate-like fusion part (40) is provided at an upper height position of the body part (10). The blow-molded container according to any one of claims 1 to 2 , wherein the plate-like fusion part (40) is provided at a substantially central height position of the body part (10). The blow-molded container according to any one of claims 1 to 2 , wherein a plurality of plate-like fusion parts (40) are formed along the height direction of the body part (10).