JP2020104934A - Synthetic resin container and manufacturing method of synthetic resin container - Google Patents

Abstract

To provide a synthetic resin container and a manufacturing method of the synthetic resin container with improved work efficiency when filling contents while improving transportation efficiency of the container before the contents are filled.SOLUTION: A synthetic resin container 100 of the present disclosure includes a tubular mouth portion 10 and a body portion 20 continuous to a lower portion of the mouth portion 10, in which the body portion 20 has an outer layer body 22a and an inner layer body 22b, and has a peeling portion 22 where the inner layer body 22b can be peeled from the outer layer body 22a, and a non-peeling portion 24 that is provided at a position continuous with the peeling portion 22 and has an opening 28 at a position separated from the peeling portion 22, and the inner layer body 22b closes a communication port 18 that connects the mouth portion 10 and the body portion 20 by extending radially inward beyond the outer layer body 22a at a position where the mouth portion 10 and the body portion 20 are continuous. The outer layer body 22a and the inner layer body 22b can form a storage space S for the contents by peeling the inner layer body 22b from the outer layer body 22a and pushing it toward the opening 28 side.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to a synthetic resin container and a method for manufacturing a synthetic resin container.

BACKGROUND ART Conventionally, a synthetic resin container excellent in mass productivity has been known as a container for storing food seasonings such as soy sauce and beverages, cosmetics such as lotion, toiletries such as shampoo and conditioner, and liquid soap as content liquids. (See, for example, Patent Document 1).

It is assumed that the synthetic resin container described in Patent Document 1 is delivered from a container maker to a contents supply maker, and the contents supply maker fills the container with the contents before shipping. When a synthetic resin container is transported from a container manufacturer to a contents supplier, the containers can be stacked one above the other to reduce the total volume during transportation and improve the transportation efficiency. In addition, the bottom plate can be attached to the bottom of the container before filling the contents so that the contents can be filled, so the shape of the container is more stable than when a pouch or paper container is used. Reliability and shock resistance during transportation can be improved.

JP 2004-26266 A

However, in the above-mentioned synthetic resin container, since it is necessary to attach the bottom plate to the lower part of the container before filling the contents, there is room for improvement in work efficiency when filling the contents.

The present disclosure has been made in view of such a problem, and an object thereof is to improve the transport efficiency of a container before filling the contents, and to improve the work efficiency when filling the contents. It is to provide a resin container and a method for manufacturing a synthetic resin container.

The synthetic resin container of the present disclosure,
A tubular mouth,
A container made of synthetic resin, which comprises a body portion connected to a lower portion of the mouth portion,
The body is
A peeling portion having an outer layer body and an inner layer body provided inside the outer layer body, and being provided so as to be continuous with the mouth portion, the inner layer body being peelable from the outer layer body,
A non-peeling portion which is provided in a position continuous with the peeling portion and which does not peel in the thickness direction and has an opening at a position separated from the peeling portion,
The inner layer body, at a position where the mouth portion and the body portion are continuous, closes a communication port that communicates the mouth portion and the body portion by extending radially inward beyond the outer layer body,
The outer layer body and the inner layer body can form a storage space for the contents by peeling the inner layer body from the outer layer body and pushing the inner layer body toward the opening side.

Further, in the synthetic resin container of the present disclosure, in the above-mentioned configuration, the body portion has a topped cylindrical shape having the opening at the lower end portion, and the non-peeling portion is continuous below the peeling portion. Is preferred.

Further, in the synthetic resin container according to the present disclosure, in the above-mentioned configuration, it is preferable that the body has a truncated cone side surface shape whose diameter is expanded downward.

Further, in the synthetic resin container of the present disclosure, in the above configuration, two synthetic resin containers are vertically arranged on the inner surface of the body portion in a state where the inner layer body in the peeling section is not peeled from the outer layer body. It is preferable that, when they are overlapped with each other, a protrusion is formed so as to contact the outer surface of the body of the lower synthetic resin container and maintain the vertical interval between the two synthetic resin containers at a predetermined interval.

In addition, the synthetic resin container according to the present disclosure preferably further includes a bottom portion that is continuous with a lower end portion of the body portion, and the opening is formed at one location in a circumferential direction of the body portion.

Further, in the synthetic resin container of the present disclosure, in the above-mentioned configuration, it is preferable that the peeling portion is formed of three resin layers and the inner two layers form the inner layer body.

Further, in the synthetic resin container of the present disclosure, in the above configuration, the peeling portion is configured by three resin layers, and the first layer and the third layer are polyethylene resin layers or polypropylene resin layers from the outside, The second layer is preferably an EVOH resin layer.

Further, in the synthetic resin container of the present disclosure, in the above configuration, it is preferable that the inner layer body is formed to be thinner than the outer layer body.

Further, the method for manufacturing a synthetic resin container of the present disclosure,
A tubular mouth,
A trunk portion that is connected below the mouth portion,
In the body,
A peeling portion that has an outer layer body and an inner layer body provided inside the outer layer body and is provided so as to be continuous with the mouth portion, and the inner layer body can be peeled from the outer layer body,
A non-peelable portion that is provided at a position continuous with the peeling portion and that does not peel in the thickness direction and that has an opening at a position separated from the peeling portion is provided.
The peeling portion extends inward in the radial direction beyond the position where the mouth portion and the body portion are connected to each other, and is connected to the gate portion and closes the communication port that connects the mouth portion and the body portion. Forming the body,
Cutting the outer layer body from a portion of the peeling portion of the container body that closes the communication port.

According to the present disclosure, there are provided a synthetic resin container and a method for manufacturing a synthetic resin container, which improves the transport efficiency of the container before filling the contents and improves the work efficiency when filling the contents. be able to.

1 is a front cross-sectional view of a synthetic resin container (container body) according to a first embodiment of the present disclosure. 1A is a detailed view of an A part of FIG. 1, and FIG. 1B is a detailed view of a B part of FIG. It is a flow chart which shows a procedure of a manufacturing method of a synthetic resin container which is a 1st embodiment of this indication. (A) is a figure which shows the state of the resin in the cavity in the 1st process (injection of resin of a main material) which carries out lamination injection molding of the synthetic resin container (container body) which is 1st Embodiment of this indication. FIG. 6B is a diagram showing a state of the resin in the cavity after the second step (injection of the main material resin and the gas barrier resin) and the completion of the third step (reinjection of only the main material resin). FIG. 5 is a diagram showing a step of cutting out the outer layer body of a portion that closes the communication port in the method for manufacturing the synthetic resin container according to the first embodiment of the present disclosure. It is a figure showing the state where the synthetic resin containers which are a 1st embodiment of this indication were piled up and down. It is a figure which shows the state which inserts the peeling rod from the opening part and is making the inner layer body peel from the outer layer body in the synthetic resin container which is 1st Embodiment of this indication. It is a figure which shows the state which filled the content in the accommodation space of the synthetic resin container which is 1st Embodiment of this indication, and attached the lid. It is the (a) front view and the (b) bottom view of the synthetic resin container which is 2nd Embodiment of this indication. It is CC sectional drawing in FIG. FIG. 11 is a diagram showing a state in which the inner layer body is separated from the outer layer body in FIG. 10 and the pump assembly is attached to the mouth portion.

Hereinafter, the present disclosure will be described more specifically by way of example with reference to the drawings.

A synthetic resin container 100 according to a first embodiment of the present disclosure shown in FIG. 1 has a tubular mouth portion 10 for discharging contents, and a body portion 20 having a topped tubular shape connected to a lower portion of the mouth portion 10. It has and.

In the present specification, the claims, and the drawings, the up-down direction means the upper side and the lower side in a state where the synthetic resin container 100 is in the upright posture as shown in FIG. Further, the radially outer side is a direction toward the outer side along a straight line passing through the central axis O1 of the synthetic resin container 100 in FIG. 1 and perpendicular to the central axis O1, and the radially inner side is along the straight line. It means a direction toward the central axis O1.

As shown in FIG. 1, the mouth 10 includes a substantially cylindrical outer peripheral wall 11, and a lid 60 (see FIG. 8), a pump 83 (see FIG. 11), and the like are attached to and detached from the outer surface of the outer peripheral wall 11. A male screw part 11a is formed so that it can be mounted. Instead of the male screw portion 11a, an engaging protrusion protruding radially outward from the outer peripheral wall 11 may be provided so that the lid 60, the pump 83, etc. can be attached by tapping.

Below the mouth portion 10, a barrel-shaped body portion 20 having a top is provided. The body portion 20 is integrally formed with the mouth portion 10 and includes a side portion having a truncated cone side surface shape whose diameter is expanded downward and an opening 28 which communicates with the outside at a lower end portion. The body portion 20 has an outer layer body 22a and an inner layer body 22b provided inside the outer layer body 22a in an upper region connected to the mouth portion 10, and the inner layer body 22b has a peeling portion 22 that is peelable from the outer layer body 22a. I have it. In addition, the body portion 20 includes a non-peeling portion 24 that is continuous with the peeling portion 22 and that is not peeled in the thickness direction. The opening 28 is formed at the lower end of the non-peeling portion 24 and is provided at a position separated from the peeling portion 22. FIG. 2B is an enlarged view of a boundary portion between the peeling portion 22 and the non-peeling portion 24 in the body portion 20.

In the present embodiment, a synthetic resin material such as polyethylene (PE) or polypropylene (PP) can be used for the outer layer body 22a. When polyethylene is used for the outer layer body 22a, high-density polyethylene resin (HDPE) or low-density polyethylene (LDPE) can be used, and especially when low-density polyethylene (LDPE) is used, it can be applied to the body portion 20. It can have flexibility. However, the embodiment is not limited to this, and other synthetic resin materials such as polyethylene terephthalate (PET) may be used.

As shown in FIG. 2B, the inner layer body 22b is composed of an innermost layer 22b2 located on the innermost side of the body portion 20 and an intermediate layer 22b1 arranged between the outer layer body 22a and the innermost layer 22b2. There is. The middle layer 22b1 and the innermost layer 22b2 form a second layer and a third layer when counted from the outside including the outer layer body 22a (when the outer layer body 22a is counted as the first layer).

In the present embodiment, as the material of the intermediate layer 22b1, a material having a gas barrier property such as ethylene/vinyl alcohol copolymer resin (EVOH) can be used. This can prevent the contents from being exposed to oxygen or the like, and thus can suppress the deterioration of the contents. However, the present invention is not limited to this mode, and other synthetic resin materials such as nylon may be used as the material of the intermediate layer 22b1.

Further, in the present embodiment, as the material of the innermost layer 22b2, for example, the same material as the outer layer body 22a can be used. However, the present invention is not limited to this aspect, and the innermost layer 22b2 may be made of another synthetic resin material different from that of the outer layer body 22a.

In the example of FIG. 1, a gate 41a (FIG. 4A, ( The gate portion 13 formed in (b) is arranged. As shown in FIG. 1, the peeling portion 22 of the body portion 20 extends radially inward beyond a position (connection position) where the mouth portion 10 and the body portion 20 are continuous (a portion radially inward from the connection position). Is referred to as the peeling portion 15), and the gate portion 13 extends upward from above the central axis O1 of the peeling portion 15.

The gate portion 13 has a substantially columnar shape as shown in FIG. The gate portion 13 is connected to the outer layer body 22a of the body portion 20 via the outer layer body 15a of the peeling portion 15, and is made of the same material as the outer layer body 22a.

Next, a method of manufacturing the synthetic resin container 100 will be described in detail with reference to the flowchart of FIG.

When manufacturing the synthetic resin container 100, first, the container body 101 shown in FIG. 1 is formed by laminated injection molding (step S101). 1 has been described so far as the synthetic resin container 100, but more accurately, it is the container body 101 formed by laminated injection molding, and the communication port 18 that communicates the mouth portion 10 and the body portion 20 is separated. Because it is covered and closed by the portion 15. It can be used as a container by performing a post-process (step S103) described later.

The container body 101 can be formed by using the laminated injection molding shown in FIGS. 4A and 4B.

That is, in the first step shown in FIG. 4A, from the gate 41a of the molding die 40 of the container body 101 to the main material resin 31 (polyethylene (PE) in the present embodiment) forming the outer layer body 22a and the innermost layer 22b2. Alternatively, polypropylene (PP) is injected into the cavity C of the molding die 40. Of the supplied main material resin 31, a portion that stays near the outer mold 41 that forms the outer shape of the container body 101 and the inner mold 43 that forms the inner side of the body portion 20 is the both molds 41. , 43, the temperature is likely to drop due to heat radiation, so that it is easy to solidify in layers along both molds 41, 43 (becomes a solidified portion 31a shown in FIG. 4A). Therefore, in the cavity C of the molding die 40, a solidified portion 31a of which solidification has started on the inner surface side of the outer die 41, a solidified portion 31a of which solidification has started on the outer surface side of the inner die 43, and It can be filled with the main material resin 31 which is located in the middle and has an unsolidified portion 31 b which is a middle layer portion which is not solidified yet and has high fluidity.

Next, in the second step, the main material resin 31c and the EVOH 33 are injected from the gate 41a and made to flow in the direction away from the gate 41a between the solidified portions 31a. By this flow, the unsolidified portion 31b of the main material resin 31 can be made to flow while being pushed toward the remaining space in the cavity C, and can be solidified in layers one after another while spreading before the EVOH 33. Therefore, the EVOH 33 can have a laminated structure in which the EVOH 33 is sandwiched between the solidified portions 31 a of the main material resin 31.

Finally, in the third step, only the main material resin 31d is injected again from the gate 41a. As a result, the radial center region in the gate 41a can be filled with the main resin 31d (see FIG. 4B). Further, the main material resin 31c and the EVOH 33 injected from the gate 41a in the second step described above are finally cured in a state of extending to the intermediate height of the body portion 20 as shown in FIG. 4B. The EVOH 33 injected from the gate 41a in the second step becomes the intermediate layer 22b1 that forms the peeling portion 22 of the body portion 20. Further, the solidified portion 31a adjacent to the intermediate layer 22b1 and facing the inner die 43 constitutes the innermost layer 22b2. The main material resin 31c injected together with the EVOH 33 in the second step constitutes the outer layer body 22a together with the solidified portion 31a facing the outer die 41. That is, the peeling portion 22 extends from the upper end portion of the body portion 20 to the height position where the EVOH 33 finally extends in the third step, and the region below the EVOH 33 that does not enter is the non-peeling portion 24. The height position of the peeling portion 22 in the body portion 20 is determined depending on the volume of the main material resin 31 injected into the cavity C in the first step and the like. The outer surface of the body portion 20 can be decorated with an in-mold label or the like formed by inserting a label created by offset printing or the like into a mold.

In this embodiment, the layered injection molding is used to form the container body 101, but the present invention is not limited to this mode, and other molding methods such as extrusion molding and sheet molding may be used. In particular, when another synthetic resin material different from the outer layer body 22a is used for the innermost layer 22b2, it is preferable to use a molding method such as extrusion molding or sheet molding to mold the container body 101.

After the container body 101 is formed, the outer layer body 15a is cut off from the peeling portion 15 of the peeling portions 15 and 22 in a region that closes the communication port 18 (step S103). As a result, the gate portion 13 above the outer layer body 15a is also removed. This step can be realized by, for example, a cutting means 90 (ultrasonic cutter) or the like that can apply vertical ultrasonic vibration to the blade portion 91 provided at the lower end, as shown in FIG. By cutting off the outer layer body 15a, the communication port 18 between the mouth portion 10 and the body portion 20 is closed by only the inner layer body 15b. In the present embodiment, only the outer layer body 15a is cut off and removed from the container body 101, but the present invention is not limited to this mode. The cutting means 90 may cut the intermediate layer 15b1 (see FIG. 2A) in addition to the outer layer body 15a, leaving only the innermost layer 15b2. The layer to be cut can be selected, for example, by accurately moving the tip of the blade portion 91 to the lower end of the layer to be cut.

The synthetic resin container 100 formed by cutting out the outer layer body 15a in step S103 can be vertically stacked as shown in FIG. As described above, the body portion 20 of the synthetic resin container 100 has a truncated cone side surface shape that expands downward, and the outer diameter of the upper portion of the body portion 20 is smaller than the inner diameter of the lower portion of the body portion 20. Is also configured to have a smaller diameter. Therefore, the upper portion of the body portion 20 of the lower synthetic resin container 100 enters the inside of the body portion 20 of the upper synthetic resin container 100 and contacts the lower end of the protruding portion 26 formed on the body portion 20.

In the present embodiment, the protruding portions 26 are provided at three locations at equal intervals in the circumferential direction, and are provided so as to protrude radially inward inside the upper portion of the body portion 20. The outer surface of the body portion 20 of the lower synthetic resin container 100 is brought into contact with the projecting portion 26 of the upper synthetic resin container 100 to maintain the vertical interval between the two synthetic resin containers 100 at a predetermined interval. can do. By stacking a plurality of synthetic resin containers 100 vertically as shown in FIG. 6, it is possible to suppress the total volume of the container during transportation and improve the transportation efficiency.

After executing step S103, the inner layer body 22b is peeled from the outer layer body 22a of the peeling portion 22 and pushed out toward the opening 28 side (step S105). In the step of peeling off the inner layer body 22b, for example, as shown in FIG. 7, the peeling rod 50 is inserted into the container from the mouth portion 10 of the synthetic resin container 100 and the communication port 18 is closed. Is pressed downward. When the inner layer body 15b of the mouth portion 10 is pressed, the inner layer body 22b of the peeling portion 22 of the body portion 20 connected thereto is peeled from the outer layer body 22a, and the opening 28 is formed with the boundary portion between the peeling portion 22 and the non-peeling portion 24 as a fulcrum. Folded back to the side. As a result, a storage space S for the contents, which is defined by the outer layer body 22a and the peeled inner layer body 22b, is formed in the body portion 20 of the synthetic resin container 100.

In addition, in this embodiment, since the inner layer body 22b is configured to have a smaller thickness than the outer layer body 22a, the bending rigidity of the inner layer body 22b is suppressed, and the inner layer body 22b is easily separated from the outer layer body 22a. It can be peeled off.

The formation of the accommodation space S by peeling the outer layer body 22a and the inner layer body 22b is not limited to the method using the peeling rod 50 described above. For example, a content filling nozzle is attached to the mouth portion 10, the inner layer body 15b is pressed by filling the content while pressurizing the inside of the container, and the inner layer body 22b of the body portion 20 connected to the inner layer body 15b is connected to the outer layer body. 22a may be peeled off to increase the volume of the accommodation space S while filling the contents.

FIG. 8 shows a state where the accommodation space S formed in step S105 is filled with the contents. A lid 60 having a peripheral wall 61 and a ceiling wall 62 connected to the upper end of the peripheral wall 61 is attached to the mouth portion 10. The lid body 60 is attached to the mouth portion 10 by screwing an internal thread portion 61 a formed on the inner surface of the peripheral wall 61 to the male thread portion 11 a of the mouth portion 10. A seal wall 63 hangs from the lower surface of the top wall 62, and the mouth 10 is liquid-tightly sealed by being fitted to the inner surface of the outer peripheral wall 11 of the mouth 10. In the present embodiment, the outer layer body 22a is configured to be thicker than the inner layer body 22b. Therefore, the user can grip the outer layer body 22a portion having higher rigidity than the inner layer body 22b, or the non-peeling portion 24 having higher rigidity than the outer layer body 22a, so that the synthetic resin container 100 can be held more stably. It can be handled. Further, since the inner layer body 22b forming the accommodation space S is covered by the non-peeling portion 24 from the outside in the radial direction, the inner layer body 22b having low rigidity can be protected by the non-peeling portion 24 having high rigidity.

It should be noted that step S105 may or may not be added to one step constituting the method for manufacturing the synthetic resin container 100 according to the present embodiment. That is, when it is considered that the state in which the inner layer body 22b is inverted to form the accommodation space S in step S105 is the state in which the synthetic resin container 100 is completed, the method of manufacturing the synthetic resin container 100 starts from step S101. Including up to S105. On the other hand, in step S103, the outer layer body 15a that closes the communication port 18 is cut off, the peeling portion 22 is not peeled off, and the housing space S is not yet formed. If it is considered that there is, the method for manufacturing the synthetic resin container 100 includes steps S101 to S103.

As described above, the present embodiment is a synthetic resin container 100 that includes the tubular mouth portion 10 and the body portion 20 that extends below the mouth portion 10. The body portion 20 includes the outer layer body 22a. It has an inner layer body 22b provided inside the outer layer body 22a, and is provided so as to be continuous with the mouth portion 10. The inner layer body 22b is provided at a peeling portion 22 that is peelable from the outer layer body 22a and at a position that is continuous with the peeling portion 22. And the non-peelable portion 24 that does not peel in the thickness direction and has an opening 28 at a position separated from the peeled portion 22, and the inner layer body 22b has an outer layer body at a position where the mouth portion 10 and the body portion 20 are continuous. 22a is extended inward in the radial direction to close the communication port 18 that communicates the mouth portion 10 and the body portion 20, and the inner layer body 22b is separated from the outer layer body 22a and is pushed toward the opening 28 side. The outer layer body 22a and the inner layer body 22b are configured to be able to form the accommodation space S for the contents. By adopting such a configuration, it is possible to improve the transportation efficiency of the container before filling the contents by inserting the other synthetic resin container 100 into the opening 28, and at the time of filling the contents with a bottom plate or the like. Since there is no need to attach the, it is possible to improve work efficiency.

Further, in the present embodiment, the body portion 20 has a topped cylindrical shape having the opening 28 at the lower end portion, and the non-peeling portion 24 is configured to be continuous with the lower portion of the peeling portion 22. By adopting such a configuration, by inserting the peeling rod 50 from the mouth portion 10, the inner layer body 15b is pressed, and the inner layer body 22b continuing to this is peeled from the outer layer body 22a and easily pushed out toward the opening 28 side. You can Further, since the inner layer body 22b peeled from the outer layer body 22a in the peeling section 22 is arranged inside the non-peeling section 24, the inner layer body 22b can be protected by the non-peeling section 24.

Further, in the present embodiment, the body portion 20 is configured to have a truncated cone side surface shape whose diameter is expanded downward. By adopting such a configuration, it is possible to easily stack a plurality of synthetic resin containers 100 in the vertical direction before the inner layer body 22b is separated from the outer layer body 22a, so that the containers can be transported before filling the contents. The efficiency can be improved.

Further, in the present embodiment, when the two synthetic resin containers 100 are vertically stacked on the inner surface of the body portion 20 in a state where the inner layer body 22b in the peeling section 22 is not peeled from the outer layer body 22a, The protruding portion 26 is formed so as to be in contact with the outer surface of the body portion 20 of the synthetic resin container 100 to maintain the vertical interval between the two synthetic resin containers 100 at a predetermined interval. By adopting such a configuration, when the synthetic resin containers 100 are stacked one on top of another and transported, the vertical intervals of the containers can be maintained at a predetermined interval, so that the total weight of each shipping container during transportation is reduced. It can be made uniform and the transportation efficiency can be improved.

In addition, in the present embodiment, the peeling portion 22 is configured by three resin layers, and the inner two layers (the intermediate layer 22b1 and the innermost layer 22b2) are configured to configure the inner layer body 22b. Since the intermediate layer 22b1 and the innermost layer 22b2 of the synthetic resin container 100 formed in step S101 by the laminated injection molding are formed to have a smaller thickness than the outer layer body 22a, the accommodation space S is formed by adopting the above-described configuration. It is possible to prevent the difference in thickness between the outer layer body 22a and the inner layer body 22b forming the layer from becoming remarkable.

Further, in the present embodiment, the peeling portion 22 is composed of three resin layers, the first layer and the third layer are polyethylene resin layers or polypropylene resin layers from the outside, and the second layer is an EVOH resin layer. Configured to be. By adopting such a configuration, at least a part of the resin layer (intermediate layer 22b1) forming the accommodation space S can be formed of the gas barrier resin, so that the contents are easily exposed to oxygen or the like and deteriorate. Can be suppressed.

In addition, in the present embodiment, the inner layer body 22b is configured to be thinner than the outer layer body 22a. By adopting such a configuration, the user can grip the outer layer body 22a portion having a higher rigidity than the inner layer body 22b, or the non-peeling portion 24 having a higher rigidity than the outer layer body 22a, and thus more stable. The synthetic resin container 100 can be handled. Further, since the inner layer body 22b portion forming the accommodation space S is covered from the outside in the radial direction by the non-peeling portion 24, the inner layer body 22b portion having low rigidity can be protected by the non-peeling portion 24 having high rigidity.

In addition, the present embodiment includes a tubular mouth portion 10 and a body portion 20 that extends below the mouth portion 10. The body portion 20 includes an outer layer body 22a and an inner layer body provided inside the outer layer body 22a. 22b and a peeling portion 22 that is provided so as to be continuous with the mouth portion 10 so that the inner layer body 22b can be peeled from the outer layer body 22a and a position that is continuous with the peeling portion 22 and that is not peeled in the thickness direction and that is peeling portion 22. A non-peeling portion 24 having an opening 28 is provided at a position spaced apart from, and the peeling portion 22 extends inward in the radial direction beyond the position where the mouth portion 10 and the body portion 20 are continuous, so that the peeling portion 22 is provided in the gate portion 13. A step of forming the container body 101 that is continuous and that closes the communication port 18 that communicates the mouth portion 10 and the body portion 20, and a portion that closes the communication port 18 of the peeling portions 15 and 22 of the container body 101 (peeling portion). 15) from the outer layer body 15a is removed. By adopting such a configuration, it is possible to improve the transportation efficiency of the container before filling the contents by inserting the other synthetic resin container 100 into the opening 28, and at the time of filling the contents with a bottom plate or the like. Since there is no need to attach the, it is possible to improve work efficiency.

Next, the synthetic resin container 200 according to the second embodiment of the present disclosure shown in FIGS. 9 to 11 will be described in detail. The synthetic resin container 200 according to the present embodiment is different from the first embodiment in that the opening 28 is provided not at the lower end portion of the body portion 20 but at the side portion of the body portion 20, that is, the body portion 20. There are many points in common with the first embodiment except that the cross-sectional shape of is a substantially D-shape instead of a substantially circular shape. Therefore, the difference from the first embodiment will be mainly described here.

The synthetic resin container 200 according to the second embodiment of the present disclosure shown in FIGS. 9 to 11 is a cylindrical mouth portion 10 for discharging the contents, and a substantially D-shape in plan view which is continuous with the mouth portion 10 below the mouth portion 10. The body portion 20 (see FIG. 9B) is provided, and the bottom portion 70 continuous with the lower end portion of the body portion 20 is provided. An opening 28 (see FIG. 10) that communicates the inside and outside of the body 20 is provided at one location in the body 20 and the bottom 70 in the circumferential direction.

As shown in FIG. 10, the body portion 20 has an outer layer body 22a and an inner layer body 22b provided inside the outer layer body 22a, and the inner layer body 22b is detachable from the outer layer body 22a by a peeling portion 22 and a thickness. It has a non-peeling portion 24 that does not peel in the direction. The peeling portion 22 is provided in a region continuous with the mouth portion 10 as shown in FIG. In the present embodiment, the non-peeling portion 24 is provided at one location in the body portion 20 in the circumferential direction (rightward in FIG. 10) and is provided adjacent to the peeling portion 22. The non-peeling portion 24 has an opening 28 at a position separated from the peeling portion 22. That is, the peeling portion 22 is connected to the opening 28 via the non-peeling portion 24.

Similar to the first embodiment, the synthetic resin container 200 according to the present embodiment closes the communication port 18 between the mouth portion 10 and the body portion 20 in the peeling portion after forming the container body by the laminated injection molding. The inner layer body 15b is formed by cutting the outer layer body from the peeled portion of the region to be formed. Note that the non-peeling portion 24 can be formed by injecting the main resin in advance into the cavity in the first step prior to the second step of forming the intermediate layer, as in the first embodiment. it can.

Then, when the synthetic resin container 200 according to the present embodiment is used, the inner layer body 22b is peeled from the outer layer body 22a of the peeling portion 22, the non-peeling portion 24 is inverted as a fulcrum and pushed out toward the opening 28 side (Fig. 11). In the step of peeling the inner layer body 22b from the outer layer body 22a, for example, a content filling nozzle is attached to the mouth 10 and the inner layer body 15b is pressed by filling the content while pressurizing the inside of the container, This can be achieved by separating the inner layer body 22b of the body portion 20 connected to the body 15b from the outer layer body 22a to increase the volume of the accommodation space S and filling the contents. In addition, as in the first embodiment, the peeling rod is inserted into the container from the opening 10 of the synthetic resin container 200, and the inner layer body 15b that closes the communication port is pressed downward, thereby forming an inner layer. A part of the inner layer body 22b connected to the body 15b may be peeled off from the outer layer body 22a, and then the inside of the container may be pressurized to further peel off the inner layer body 22b.

FIG. 11 shows the synthetic resin container 200 in a state where the accommodation space S is formed by separating the inner layer body 22b from the outer layer body 22a. A pump 83 (pump assembly 80) with a nozzle head 85 having a discharge hole 85 a is attached to the mouth portion 10 by a mounting cap 81. As a result, the contents in the accommodation space S can be ejected to the outside from the ejection holes 85a by pressing the nozzle head 85.

When stacking a plurality of synthetic resin containers 200 of this embodiment, the body portion 20 of another synthetic resin container 200 is placed in the opening 28 of the synthetic resin container 200 in the state of FIG. You can push it in from. In this case, the body 20 of the other synthetic resin container 200 may be pushed in while elastically deforming the upper end 20t of the body 20 upward, or the right side of FIG. You may provide the inclination so that it may become high.

As described above, in the present embodiment, the bottom portion 70 that is continuous with the lower end portion of the body portion 20 is further provided, and the opening 28 is formed at one location in the circumferential direction of the body portion 20. By adopting such a configuration, by pushing the inner layer body 22b radially outward (rightward in FIG. 11) beyond the outer layer body 22a of the body portion 20, the accommodation space S having a volume equal to or larger than the volume of the outer layer body 22a. Can be formed.

Although the present disclosure has been described based on the drawings and the embodiments, it should be noted that those skilled in the art can easily make various variations and modifications based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to logically contradict each other, and a plurality of components can be combined into one or divided. It should be understood that these are also included in the scope of the present invention.

For example, in the first and second embodiments, the peeling portion 22 of the body portion 20 is configured to have a three-layer laminated structure, but the invention is not limited to this aspect. The peeling portion 22 may have a two-layer structure including one outer layer body and one inner layer body, or may have a laminated structure of four or more layers.

Further, in the first and second embodiments, of the three-layer laminated structure of the peeling portion 22, the outer one layer constitutes the outer layer body 22a, and the inner two layers constitute the inner layer body 22b. However, it is not limited to this mode. For example, the reference numerals 22a and 22b1 in FIG. 2B may configure the outer layer body, and only the reference numeral 22b2 may configure the inner layer body. In that case, in step S103 of FIG. 3, not only the code 15a connected to the code 22a but also the code 15b1 connected to the code 22b1 may be cut by the cutting means 90 (see FIGS. 2A and 2B). ).

10 mouth part 11 outer peripheral wall 11a male screw part 13 gate part 15 peeling part 15a outer layer body 15b inner layer body 15b1 middle layer 15b2 innermost layer 18 communication port 20 body part 20t upper end 22 peeling part 22a outer layer body 22b inner layer body 22b1 middle layer Inner layer 24 Non-peeling portion 26 Projection portion 28 Opening 31 Main material resin 31a Solidified portion 31b Unsolidified portion 31c Main material resin 33 EVOH
40 molding die 41 outer die 41a gate 43 inner die 50 stripping rod 60 lid 61 peripheral wall 61a female screw portion 62 top wall 63 seal wall 70 bottom portion 80 pump assembly 81 mounting cap 83 pump 85 nozzle head 85a discharge Hole 90 Excision Means 91 Blade Part 100 Synthetic Resin Container 101 Container C Cavity O1 Center Axis S Storage Space

Claims (9)

A tubular mouth,
A container made of synthetic resin, comprising:
The body is
A peeling portion that has an outer layer body and an inner layer body provided inside the outer layer body and is provided so as to be continuous with the mouth portion, and the inner layer body can be peeled from the outer layer body,
A non-peeling portion which is provided in a position continuous with the peeling portion and which does not peel in the thickness direction and has an opening at a position separated from the peeling portion,
The inner layer body, at a position where the mouth portion and the body portion are continuous, closes a communication port that communicates the mouth portion and the body portion by extending radially inward beyond the outer layer body,
A container made of synthetic resin, wherein the outer layer body and the inner layer body can form a storage space for contents by peeling the inner layer body from the outer layer body and pushing the inner layer body toward the opening side. The synthetic resin container according to claim 1, wherein the body portion has a topped cylindrical shape having the opening at the lower end portion, and the non-peeling portion is continuous to the lower side of the peeling portion. The synthetic resin container according to claim 2, wherein the body has a frustoconical side surface shape whose diameter is expanded downward. When the two synthetic resin containers are vertically stacked on the inner surface of the body portion in a state where the inner layer body in the peeling portion is not peeled from the outer layer body, the outer surface of the body portion of the lower synthetic resin container The synthetic resin container according to claim 2 or 3, wherein a projecting portion that is in contact with the above and maintains a vertical interval between the two synthetic resin containers at a predetermined interval is formed. The synthetic resin container according to claim 1, further comprising a bottom portion continuous with a lower end portion of the body portion, wherein the opening is formed at one location in a circumferential direction of the body portion. The synthetic resin container according to any one of claims 1 to 5, wherein the peeling portion is formed of three resin layers, and the inner two layers form the inner layer body. 7. The peeling portion is composed of three resin layers, the first layer and the third layer are polyethylene resin layers or polypropylene resin layers from the outside, and the second layer is an EVOH resin layer. The synthetic resin container according to any one of 1. The synthetic resin container according to any one of claims 1 to 7, wherein the inner layer body is formed to be thinner than the outer layer body. A tubular mouth,
A trunk portion that is connected below the mouth portion,
In the body,
A peeling portion that has an outer layer body and an inner layer body provided inside the outer layer body and is provided so as to be continuous with the mouth portion, and the inner layer body can be peeled from the outer layer body,
A non-peelable portion that is provided at a position continuous with the peeling portion and that does not peel in the thickness direction and that has an opening at a position separated from the peeling portion is provided.
The peeling portion extends inward in the radial direction beyond the position where the mouth portion and the body portion are connected to each other, and is connected to the gate portion and closes the communication port that connects the mouth portion and the body portion. Forming the body,
A step of cutting the outer layer body from a portion of the peeling portion of the container body that closes the communication port, the method of manufacturing a synthetic resin container.

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