JP2020196500A - Synthetic resin container and method for manufacturing synthetic resin container - Google Patents

Abstract

To provide a synthetic resin container and a method for manufacturing the synthetic resin container, which improve working efficiency when filling a content while improving transportation efficiency of the container before filling the content.SOLUTION: A synthetic resin container 100 of the present disclosure includes a cylindrical mouth part 10 and a trunk part 20 connected below the mouth part 10. The trunk part 20 having an outer layer 102 and an inner layer 101 provided inside the outer layer 102 includes: a peeling part 22 provided so as to be connected to the mouth part 10 and capable of peeling the inner layer 101 from the outer layer 102; and a non-peeling part 24 provided at a position connected to the peeling part 22, not peeled in a thickness direction and having an opening 28 at a position separated from the peeling part 22. The inner layer 101 extends beyond an upper end part of the trunk part 20 and extends radially inward from an outer peripheral wall 11 of the mouth part 10 to close the mouth part 10. The outer layer 102 and the inner layer 101 form a storage space S for the content by peeling the inner layer 101 from the outer layer 102 and pushing it toward the opening 28.SELECTED DRAWING: Figure 3

Description

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

Conventionally, synthetic resin containers with excellent mass productivity have been known as containers for storing food seasonings such as soy sauce, beverages, cosmetics such as lotion, and toiletries such as shampoo, conditioner, and liquid soap as the content liquid. (See, for example, Patent Document 1).

It is assumed that the synthetic resin container described in Patent Document 1 is delivered from the container maker to the content supplier, and the content supplier fills the container with the content and ships it. When transporting a synthetic resin container from a container maker to a content supplier, the total volume during transportation can be suppressed and the transportation efficiency can be improved by stacking the containers one above the other. In addition, since the contents can be filled by attaching the bottom plate to the bottom of the container before filling the contents, the shape of the container is stable compared to the case where a pouch or a paper container is used for the container. It is possible to improve the reliability of the property and the impact during transportation.

Japanese Unexamined Patent Publication No. 2004-26266

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

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

The synthetic resin container of the present disclosure is
With a tubular mouth
A synthetic resin container that is connected below the mouth portion and has a body portion having an outer layer body and an inner layer body provided inside the outer layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The peeled portion can be peeled off by applying a lubricant between the outer layer body and the inner layer body.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
By peeling the inner layer body from the outer layer body and pushing it toward the opening side, the outer layer body and the inner layer body can form a storage space for the contents.

In addition, the synthetic resin container of the present disclosure is
With a tubular mouth
A synthetic resin container that is connected below the mouth portion and has a body portion having an outer layer body and an inner layer body provided inside the outer layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The outer layer body and the inner layer body are provided over substantially the entire height region of the body portion, respectively.
The outer layer body and the inner layer body are formed of different materials having low compatibility.
The non-peeling portion has a non-peeling means that does not peel the outer layer body and the inner layer body.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
By peeling the inner layer body from the outer layer body and pushing it toward the opening side, the outer layer body and the inner layer body can form a storage space for the contents.

Further, the method for manufacturing the synthetic resin container of the present disclosure is as follows.
An outer layer body having a tubular mouth portion and a body portion connected below the mouth portion,
A method for manufacturing a synthetic resin container including an inner layer provided inside the body of the outer layer.
The step of forming one of the outer layer body and the inner layer body,
It includes a step of using one of the outer layer body and the inner layer body as an insert material and insert molding the other.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
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 extruding a portion that closes the mouth portion toward the opening side. ..

Further, the method for manufacturing the synthetic resin container of the present disclosure is as follows.
An outer layer body having a tubular mouth portion and a body portion connected below the mouth portion,
A method for manufacturing a synthetic resin container including an inner layer provided inside the body of the outer layer.
A step of molding one of the outer layer body and the inner layer body,
The outer layer body and the other of the inner layer bodies are molded in two colors in the same mold as the molding of one of the outer layer body and the inner layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
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 extruding a portion that closes the mouth portion toward the opening side. ..

Further, the method for manufacturing the synthetic resin container of the present disclosure is as follows.
With a tubular mouth
A method for manufacturing a synthetic resin container including a body portion connected below the mouth portion.
Steps to create a sheet with an outer layer and an inner layer,
A step of forming an upper wall portion that closes the mouth portion, the body portion, and the upper end portion of the mouth portion by thermoforming in which the sheet is heated and softened and closely cooled in the mold.
Including the step of excising the outer layer body in the upper wall portion.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
By peeling the inner layer body from the outer layer body and pushing the inner layer body of the upper wall portion toward the opening side, the outer layer body and the inner layer body can form a storage space for the contents. To do.

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

It is a front half sectional view of the synthetic resin container which is 1st Embodiment of this disclosure. It is a front half cross-sectional view which shows the state which the peeling rod is inserted from the mouth part, and the inner layer body is peeled off from the outer layer body in the synthetic resin container which is 1st Embodiment of this disclosure. It is a front half cross-sectional view which shows the state in which the inner layer body was peeled off from the outer layer body, and the accommodation space of contents was formed in the synthetic resin container which is 1st Embodiment of this disclosure. It is a flowchart which shows the procedure of the manufacturing method of the synthetic resin container which is 1st Embodiment of this disclosure. It is a front half sectional view of the inner layer body formed by one step of the manufacturing method of the synthetic resin container which is 1st Embodiment of this disclosure. It is a figure which shows the state which applied the lubricant to the region | region which becomes the peeling part in the inner layer body shown in FIG. 5A. It is a figure which shows the state which the inner layer body coated with the lubricant shown in FIG. 5B is attached to the core of the insert molding die. FIG. 5B is a diagram showing a state in which the inner layer body coated with the lubricant shown in FIG. 5B is set in the insert molding die, and the outer layer body is insert-molded. It is a front half sectional view of the synthetic resin container which is 2nd Embodiment of this disclosure. It is a front half cross-sectional view which shows the state which the peeling rod is inserted from the mouth part, and the inner layer body is peeled off from the outer layer body in the synthetic resin container which is 2nd Embodiment of this disclosure. It is a front half cross-sectional view which shows the state in which the inner layer body was peeled off from the outer layer body, and the accommodation space of contents was formed in the synthetic resin container which is 2nd Embodiment of this disclosure. It is a flowchart which shows the procedure of the manufacturing method of the synthetic resin container which is 2nd Embodiment of this disclosure. It is a front half cross-sectional view of the inner layer body formed by one step of the manufacturing method of the synthetic resin container which is 2nd embodiment of this disclosure. It is a figure which shows the state which the cavity for the outer layer body is set in the inner layer body shown in FIG. 12 in the mold for two-color molding. It is a figure which shows the state which the outer layer body resin was injected from the state of FIG. 13, and the outer layer body was molded by two-color molding. It is a front half sectional view of the synthetic resin container which is 3rd Embodiment of this disclosure. It is a detailed view of part A in FIG. 15A. It is a detailed view of part B in FIG. 15A. It is a front half cross-sectional view which shows the state which the peeling rod is inserted from the mouth part, and the inner layer body is peeled off from the outer layer body in the synthetic resin container which is 3rd Embodiment of this disclosure. It is a front half cross-sectional view which shows the state in which the inner layer body was peeled off from the outer layer body, and the accommodation space of contents was formed in the synthetic resin container which is 3rd Embodiment of this disclosure. It is a flowchart which shows the procedure of the manufacturing method of the synthetic resin container which is 3rd Embodiment of this disclosure. It is a figure which shows the process of supplying a sheet to a mold, and performing thermoforming molding in the manufacturing method of the synthetic resin container which is 3rd Embodiment of this disclosure. It is a figure which shows the process of cutting the lower end part of the container molded in FIG. FIG. 20 is a diagram showing a step of cutting the lower end portion and then non-peeling the lower end portion. FIG. 21 is a diagram showing a step of excising the outer layer body of the upper wall portion. It is a detailed view of part C in FIG. 22A.

Hereinafter, the present disclosure will be described in more detail with reference to the drawings.

The synthetic resin container 100 according to the first embodiment of the present disclosure shown in FIG. 1 has a tubular mouth portion 10 for discharging the contents and a body portion 20 having a ridged tubular shape connected below the mouth portion 10. And have.

In the present specification, claims, and drawings, the vertical direction means upward and downward in a state where the synthetic resin container 100 is in an upright posture as shown in FIG. The radial outer side is a direction toward the outside along a straight line perpendicular to the central axis O1 through the central axis O1 of the synthetic resin container 100 in FIG. 1, and the radial inner side is along the straight line. It shall mean the direction toward the central axis O1.

As shown in FIG. 1, the mouth portion 10 is provided with a substantially cylindrical outer peripheral wall 11, and a male screw portion 11a for detachably attaching a lid, a pump, or the like is formed on the outer surface of the outer peripheral wall 11. ing. In addition, instead of the male screw portion 11a, an engaging protrusion portion protruding radially outward from the outer peripheral wall 11 may be provided so that a lid body, a pump, or the like can be attached by tapping.

A climax tubular body portion 20 is provided below the mouth portion 10. The body portion 20 is integrally formed with the mouth portion 10, and includes a side portion having a truncated cone shape that expands in diameter downward, and also has an opening 28 that leads to the outside at the lower end portion 26. The body portion 20 has an outer layer body 102 and an inner layer body 101 provided inside the outer layer body 102. The body portion 20 includes a peeling portion 22 in which the inner layer body 101 can be peeled from the outer layer 102 in the upper region connected to the mouth portion 10, and more specifically, the peeling portion inner body 22b can be peeled from the peeling portion outer body 22a. Is. Further, the body portion 20 is provided below the peeling portion 22 and includes a non-peeling portion 24 in which the inner layer body 101 does not peel off from the outer layer body 102. That is, the non-peeling part inner body 24b cannot be peeled from the non-peeling part outer body 24a. The opening 28 is formed at the lower end portion 26 of the body portion 20, and is provided at a position separated from the peeling portion 22.

As shown in FIG. 1, in the synthetic resin container 100 of the present embodiment, an opening 28 is formed in the lower end portion 26 of the body portion 20 and is open to the outside in an initial state in which the contents are not filled. Further, the body portion 20 has a truncated cone side surface shape that expands in diameter downward, and the outer diameter of the upper portion of the body portion 20 is configured to be smaller than the inner diameter of the lower portion of the body portion 20. ing. Therefore, when the synthetic resin containers 100 shown in FIG. 1 are stacked in the vertical direction, the upper portion of the body 20 of the lower synthetic resin container 100 enters the inside of the body 20 of the upper synthetic resin container 100. be able to. Therefore, in the initial state, the plurality of synthetic resin containers 100 can be easily stacked in the vertical direction, so that the transport efficiency of the containers before filling the contents can be improved.

In the present embodiment, a synthetic resin material such as polyethylene (PE) or polypropylene (PP) can be used for the outer layer 102. When polyethylene is used for the outer layer 102, high-density polyethylene resin (HDPE), low-density polyethylene (LDPE), or the like can be used, and particularly when low-density polyethylene (LDPE) is used, the body 20 can be used. It can be made flexible. However, the present invention is not limited to this, and other synthetic resin materials such as polyethylene terephthalate (PET) may be used.

In the present embodiment, it is preferable to use the same material as the outer layer 102, for example, as the material of the inner layer 101. As a result, the non-peeling part outer body 24a and the non-peeling part inner body 24b formed of the same material in the non-peeling part 24 have high compatibility and can be configured not to be peeled. However, the present invention is not limited to this embodiment, and another synthetic resin material having high compatibility with the outer layer 102 may be used for the inner layer 101.

When the same synthetic resin material is used for the outer layer 102 and the inner layer 101, the peeled outer body 22a and the peeled inner body 22b of the peeling portion 22 are originally configured not to be peeled, but in the present embodiment, as will be described later. In addition, the lubricant L is applied to the outer surface of the peeled portion 22 of the inner layer body 101 at the time of insert molding of the outer layer body 102 (see FIG. 5B). Thereby, the inner body 22b of the peeling portion in the peeling portion 22 can be easily peeled from the outer body 22a of the peeling portion after the insert molding.

For the lubricant L applied to the outside of the inner layer 101, for example, silicon, liquid paraffin, or the like can be used. However, the present invention is not limited to this embodiment, and the lubricant L may be made of another material capable of separating the inner layer body 101 and the outer layer body 102.

The inner layer 101 of the peeling portion 22 extends beyond the upper end portion of the body portion 20 as the closing portion inner body 15b, and extends radially inward from the outer peripheral wall 11 of the mouth portion 10 as shown in FIG. The mouth 10 is closed with. More specifically, the closed portion inner body 15b closes the communication port 18 that communicates the mouth portion 10 and the body portion 20. When the peeling rod 50 is inserted into the container from the mouth 10 of the synthetic resin container 100 and the inner layer 101 (closed inner body 15b) that closes the communication port 18 is pressed downward (see FIG. 2). The peeled inner body 22b of the peeled portion 22 of the body portion 20 connected to this is peeled from the peeled outer body 22a and folded back toward the opening 28 side with the boundary portion between the peeled portion 22 and the non-peeled portion 24 as a fulcrum (FIG. 3). reference). As a result, a storage space S for the contents defined by the peeled outer body 22a, the peeled inner body 22b, and the closed inner body 15b is formed in the body 20 of the synthetic resin container 100.

In the present embodiment, the peeled inner body 22b of the inner layer 101 is configured to be thinner than the peeled outer body 22a of the outer layer 102, so that the bending rigidity of the peeled inner body 22b is suppressed. Then, the inner body 22b of the peeling portion can be easily peeled from the outer body 22a of the peeling portion.

FIG. 3 shows a state in which the accommodation space S is formed and the contents can be filled in the accommodation space S. In the present embodiment, the peeled portion outer body 22a is configured to be thicker than the peeled portion inner body 22b. Therefore, the user can grip the peeled portion outer body 22a portion having higher rigidity than the peeled portion inner body 22b or the non-peeling portion 24 having higher rigidity than the peeled portion outer body 22a, so that the synthesis is more stable. The resin container 100 can be handled. Further, since the peeled portion inner body 22b constituting the accommodation space S is covered from the outside in the radial direction by the non-peeled portion 24, the peeled portion inner body 22b having low rigidity can be protected by the non-peeled portion 24 having high rigidity. ..

The formation of the accommodation space S by peeling the peeled outer body 22a and the peeled inner body 22b is not limited to the method using the peeling rod 50 described above. For example, a filling nozzle for the contents is attached to the mouth portion 10, and the contents are filled while pressurizing the inside of the container to press the closed portion inner body 15b, and the peeled portion inner body 22b of the body portion 20 connected to the closed portion inner body 15b. May be peeled off from the peeled portion outer body 22a to fill the contents while increasing the volume of the accommodation space S.

Next, the method for 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 inner layer 101 shown in FIG. 5A is formed by injection molding or the like (step S101). The inner layer 101 includes a peeling portion inner body 22b constituting the body portion 20, a non-peeling portion inner body 24b, a lower end portion inner body 26b, and a closing portion inner body 15b that closes the communication port 18 with the mouth portion 10. The portion 26 is provided with an opening 28. In addition to injection molding, other molding methods such as extrusion blow molding and stretch blow molding may be used to form the inner layer 101.

Next, as shown in FIG. 5B, the lubricant L is applied to the outer surface of the region corresponding to the peeled portion inner body 22b of the peeled portion 22 in the inner layer body 101 (step S103). By applying the lubricant L in this way, after the outer layer 102 is insert-molded, the lubricant L is interposed between the outer layer 102 and the inner layer 101 in the peeling portion 22, so that the peelability of both is improved. It will be improved. The improvement of the peelability by applying the lubricant L is not only when the non-peeling outer layer 102 and the inner layer 101 can be peeled off, but also when the peelable outer layer 102 and the inner layer 101 can be peeled off more easily. Including. On the other hand, in the non-peeling portion 24 to which the lubricant L is not applied, since the outer layer 102 and the inner layer 101 are made of the same material or a material having high compatibility, they are in close contact with each other when insert molding is performed. However, it can be configured so as not to peel off.

Next, the inner layer 101 is set in the insert molding die 40 (step S105). FIG. 6 shows a state in which the inner surface of the inner layer 101 is set in the core 43 portion of the insert molding die 40. After setting the inner layer 101 in the core 43, they are set in the cavity 41 (see FIG. 7) of the insert molding die 40. When the inner layer 101 is set in the insert molding die 40, a gap corresponding to the outer shape of the outer layer 102 is formed between the insert molding die 40 and the outer surface of the inner layer 101.

After the inner layer 101 is set in the insert molding die 40 in step S105, the outer layer 102 is insert molded (step S107). As a result, as shown in FIG. 7, the mouth portion 10 and the body portion 20 of the outer layer body 102 are formed. After that, the production of the synthetic resin container 100 shown in FIG. 1 is completed by releasing the mold from the cavity 41 and the core 43 of the insert molding die 40.

In the present embodiment, the inner layer 101 is first formed in step S101, and the outer layer 102 is insert-molded using the inner layer 101 as an insert material, but the present embodiment is not limited to this embodiment. First, the outer layer body 102 may be formed, and then the inner layer body 101 may be insert-molded using the outer layer body 102 as an insert material.

Further, in the present embodiment, the state in which the inner layer body 101 shown in FIG. 1 is not peeled off from the outer layer body 102 is described as a state in which the synthetic resin container 100 is completed. Therefore, the procedure of pressing the inner layer 101 (closed inner body 15b) that closes the communication port 18 with the peeling rod 50 shown in FIG. 2 downward to form the accommodation space S is to manufacture the synthetic resin container 100. Not added to one step of the method. However, when the state in which the storage space S shown in FIG. 3 is formed is considered to be the state in which the synthetic resin container 100 is completed, the inner layer 101 is pressed downward by the peeling rod 50 to reduce the storage space S. The step of forming may be added to one step of the method for manufacturing the synthetic resin container 100.

As described above, the present embodiment includes a tubular mouth portion 10 and a body portion 20 having an outer layer body 102 and an inner layer body 101 provided inside the outer layer body 102, which are connected below the mouth portion 10. The body portion 20 is provided so as to be connected to the mouth portion 10, and the inner layer body 101 is provided at a position connected to the peeling portion 22 and the peeling portion 22 which can be peeled from the outer layer body 102. The peeling portion 22 has a non-peeling portion 24 which does not peel off in the thickness direction and has an opening 28 at a position separated from the peeling portion 22, and the peeling portion 22 has a lubricant L between the outer layer body 102 and the inner layer body 101. The inner layer 101 extends beyond the upper end of the body 20 and extends radially inward from the outer peripheral wall 11 of the mouth 10, so that the inner layer 101 can be peeled off by being applied. The outer layer 102 and the inner layer 101 are configured to be able to form a storage space S for the contents by closing the inner layer 101, peeling the inner layer 101 from the outer layer 102, and pushing the inner layer 101 toward the opening 28 side. By adopting such a configuration, by inserting another synthetic resin container 100 into the opening 28, the transportation efficiency of the container before filling the contents can be improved, and the bottom plate or the like when filling the contents can be improved. Work efficiency can be improved because there is no need to install. Further, by applying the lubricant L to the peeling portion 22, the peelability of the inner layer 101 with respect to the outer layer 102 can be improved. The region to which the lubricant L is not applied can be configured so as not to be peeled off by forming the outer layer 102 and the inner layer 101 with the same material or a material having high compatibility. The non-peeling portion 24 can be formed relatively easily.

Further, in the present embodiment, an outer layer body 102 having a tubular mouth portion 10 and a body portion 20 connected below the mouth portion 10 and an inner layer body 101 provided inside the body portion 20 of the outer layer body 102 A method for manufacturing a synthetic resin container 100, wherein one of the outer layer 102 and the inner layer 101 is formed, and one of the outer layer 102 and the inner layer 101 is used as an insert material and the other is insert-molded. The body portion 20 is provided so as to be connected to the mouth portion 10, and the inner layer body 101 is provided at a position connected to the peeling portion 22 which can be peeled from the outer layer body 102 and the peeling portion 22, and is not peeled off in the thickness direction. It has a non-peeling portion 24 having an opening 28 at a position separated from the peeling portion 22, and the inner layer 101 extends beyond the upper end portion of the body portion 20 and extends radially from the outer peripheral wall 11 of the mouth portion 10. By extending inward, the mouth portion 10 is closed, the inner layer body 101 is peeled from the outer layer body 102, and the portion that closes the mouth portion 10 is pushed toward the opening 28, so that the outer layer body 102 and the inner layer body 101 are the contents. It is configured so that the accommodation space S can be formed. By adopting such a configuration, by inserting another synthetic resin container 100 into the opening 28, the transportation efficiency of the container before filling the contents can be improved, and the bottom plate or the like when filling the contents can be improved. Work efficiency can be improved because there is no need to install.

Next, the synthetic resin container 200 and the manufacturing method thereof, which are the second embodiments of the present disclosure shown in FIGS. 8 to 14, will be described in detail. In the synthetic resin container 200 according to the present embodiment, as compared with the first embodiment, the lower end portion of the body portion 20 constitutes the non-peeling portion 24, and two-color molding is used as the manufacturing method. Others have much in common with the first embodiment. Therefore, here, the differences from the first embodiment will be mainly described. The parts having the same functions as those of the first embodiment will be described with the same reference numerals.

The synthetic resin container 200 according to the second embodiment of the present disclosure shown in FIG. 8 has a tubular mouth portion 10 for discharging the contents and a body portion 20 having a ridged tubular shape connected below the mouth portion 10. And have.

The body portion 20 is integrally formed with the mouth portion 10, and includes a side portion having a truncated cone shape that expands in diameter downward, and also has an opening 28 that leads to the outside at the lower end portion. The body portion 20 has an outer layer body 102 and an inner layer body 101 provided inside the outer layer body 102. As shown in FIG. 8, the outer layer 102 and the inner layer 101 are provided over substantially the entire height region of the body portion 20, respectively. The term "substantially total height region" means a total height region excluding a small region of about 24a1 below the outer body provided at the lower end of the body portion 20 of FIG. The body portion 20 includes a peeling portion 22 in which the inner layer body 101 can be peeled from the outer layer 102 in the upper region connected to the mouth portion 10, and more specifically, the peeling portion inner body 22b can be peeled from the peeling portion outer body 22a. Is. Further, the body portion 20 includes a non-peeling portion 24 in which the inner layer body 101 does not peel off from the outer layer body 102 at the lower end portion. That is, at the lower end of the body portion 20, the non-peeling portion inner body 24b cannot be peeled from the non-peeling portion outer body 24a. 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.

As shown in FIG. 8, in the synthetic resin container 200 of the present embodiment, in the initial state where the contents are not filled, an opening 28 is formed at the lower end portion of the body portion 20 and is open to the outside. Further, the body portion 20 has a truncated cone side surface shape that expands in diameter downward, and the outer diameter of the upper portion of the body portion 20 is configured to be smaller than the inner diameter of the lower portion of the body portion 20. ing. Therefore, when the synthetic resin containers 200 shown in FIG. 8 are stacked in the vertical direction, the upper portion of the body 20 of the lower synthetic resin container 200 enters the inside of the body 20 of the upper synthetic resin container 200. be able to. Therefore, in the initial state, the plurality of synthetic resin containers 200 can be easily stacked in the vertical direction, so that the transport efficiency of the containers before filling the contents can be improved.

In the present embodiment, a synthetic resin material such as polyethylene (PE) or polypropylene (PP) can be used for the outer layer 102. When polyethylene is used for the outer layer 102, high-density polyethylene resin (HDPE), low-density polyethylene (LDPE), or the like can be used, and particularly when low-density polyethylene (LDPE) is used, the body 20 can be used. It can be made flexible. However, the present invention is not limited to this, and other synthetic resin materials such as polyethylene terephthalate (PET) may be used.

In the present embodiment, it is preferable to use a different kind of material having low compatibility with the outer layer 102 as the material of the inner layer 101. As a result, the inner layer 101 can be easily peeled from the outer layer 102 at the peeling portion 22. For example, polyethylene (PE) can be used as the material of the outer layer 102, and ethylene-vinyl alcohol copolymer resin (EVOH) can be used as the material of the inner layer 101. However, the present invention is not limited to this embodiment, and the same material or a material having high compatibility with each other is used as the material of the outer layer 102 and the inner layer 101, and a lubricant is used between the outer layer 102 and the inner layer 101 in the peeling portion 22. May be used to make it peelable.

In the present embodiment, as shown in FIG. 8, the lower end portion of the peeling portion 22 is connected to the upper end portion of the non-peeling portion 24 via a step portion whose diameter is expanded outward in the radial direction. Further, in the non-peeling portion outer body 24a of the non-peeling portion 24, the lower portion 24a1 of the outer body enters inward in the radial direction and covers the lower end portion of the non-peeling portion inner body 24b. With such a configuration, the non-peeling part inner body 24b has a structure of being sandwiched by the non-peeling part outer body 24a from the vertical direction, so that it is difficult to peel from the non-peeling part outer body 24a. That is, in the present embodiment, the non-peeling portion 24 is provided with a configuration (non-peeling means) in which the outer layer 102 and the inner layer 101 are not peeled by physical bonding based on the shape. However, the present invention is not limited to this aspect, and the non-peeling portion 24 may have a configuration other than the shape, for example, which does not peel off due to physical bonding or chemical bonding due to adhesive or heat.

The structure of the non-peeling portion 24 is not limited to the example of FIG. 8, and may be configured so as not to be peeled off due to various other mechanical structures, bonds, or the like.

The inner layer 101 of the peeling portion 22 extends beyond the upper end portion of the body portion 20 as the closing portion inner body 15b, and extends radially inward from the outer peripheral wall 11 of the mouth portion 10 as shown in FIG. The mouth 10 is closed with. The peeling rod 50 is inserted into the container from the mouth 10 of the synthetic resin container 200, and the inner layer 101 (closed inner body 15b) that closes the communication port 18 that communicates the mouth 10 and the body 20 is lowered. When pressed toward (see FIG. 9), the peeled inner body 22b of the peeled portion 22 of the body portion 20 connected thereto is peeled from the peeled outer body 22a and folded back toward the opening 28 (see FIG. 10). As a result, in the body 20 of the synthetic resin container 200, a storage space S for the contents defined by the peeled outer body 22a, the peeled inner body 22b, and the closed inner body 15b is formed.

Next, the manufacturing method of the synthetic resin container 200 will be described in detail with reference to the flowchart of FIG. 11.

When manufacturing the synthetic resin container 200, first, the inner layer 101 shown in FIG. 12 is formed in the first step of the two-color molding (step S201). The inner layer 101 includes a peeled inner body 22b and a non-peeled inner body 24b constituting the body 20, and a closed inner body 15b that closes the communication port 18 between the inner layer and the mouth 10, and has an opening 28 at the lower end. I have.

Next, as shown in FIG. 13, the cavity 141 for the outer layer 102 is set in the two-color molding die 140 in which the inner layer 101 is molded in step S201 (step S203). By setting the cavity 141, a gap corresponding to the outer shape of the outer layer 102 is formed between the outer surface of the inner layer 101 and the cavity 141.

After the cavity 141 is set in the two-color molding die 140 in step S203, the outer layer 102 is molded in the second step of the two-color molding (step S205). As a result, as shown in FIG. 14, the mouth portion 10 and the body portion 20 of the outer layer body 102 are formed. After that, the production of the synthetic resin container 200 shown in FIG. 8 is completed by releasing the mold from the cavity 141 and the core 143 of the two-color molding die 140.

In the present embodiment, the inner layer 101 is first molded in step S201, the mold is set, and then the outer layer 102 is molded in the second step of step S205, but the present embodiment is not limited to this embodiment. .. First, the outer layer 102 may be formed, and then the inner layer 101 may be formed.

As described above, the present embodiment includes a tubular mouth portion 10 and a body portion 20 having an outer layer body 102 and an inner layer body 101 provided inside the outer layer body 102, which are connected below the mouth portion 10. The body portion 20 is provided so as to be connected to the mouth portion 10, and the inner layer body 101 is provided at a position connected to the peeling portion 22 and the peeling portion 22 which can be peeled from the outer layer body 102. The outer layer 102 and the inner layer 101 each have a non-peeling portion 24 that does not peel off in the thickness direction and has an opening 28 at a position separated from the peeling portion 22, and each extends over a substantially total height region of the body portion 20. The outer layer body 102 and the inner layer body 101 are made of different materials having low compatibility, and the non-peeling portion 24 has a non-peeling means that does not separate the outer layer body 102 and the inner layer body 101. The inner layer body 101 extends beyond the upper end portion of the body portion 20 and extends radially inward from the outer peripheral wall 11 of the mouth portion 10 to close the mouth portion 10 and to form the inner layer body 101 with the outer layer body 102. The outer layer 102 and the inner layer 101 are configured to be able to form a storage space S for the contents by peeling from the body and pushing it toward the opening side. By adopting such a configuration, by inserting another synthetic resin container 200 into the opening 28, the transport efficiency of the container before filling the contents can be improved, and the bottom plate or the like when filling the contents can be improved. Work efficiency can be improved because there is no need to install. Further, by forming the outer layer body 102 and the inner layer body 101 with different materials having low compatibility, the outer layer body 102 and the inner layer body 101 can be easily peeled off at the peeling portion 22.

Further, in the present embodiment, an outer layer body 102 having a tubular mouth portion 10 and a body portion 20 connected below the mouth portion 10 and an inner layer body 101 provided inside the body portion 20 of the outer layer body 102 A method for manufacturing a synthetic resin container 200 comprising the step of molding the inner layer 101 and the step of molding the outer layer 102 in two colors in the same mold as the molding of the inner layer 101. Is provided so as to be connected to the mouth portion 10, and the inner layer body 101 is provided at a position connected to the peeling portion 22 and the peeling portion 22 which can be peeled from the outer layer body 102, and is not peeled in the thickness direction and is separated from the peeling portion 22. The inner layer body 101 extends beyond the upper end portion of the body portion 20 and extends radially inward from the outer peripheral wall 11 of the mouth portion 10 to have a non-peelable portion 24 having an opening 28 at the position where the opening 28 is formed. The outer layer 102 and the inner layer 101 can form a storage space S for the contents by closing the portion 10, peeling the inner layer 101 from the outer layer 102, and pushing the portion that closes the mouth 10 toward the opening 28. It was configured to be. By adopting such a configuration, by inserting another synthetic resin container 200 into the opening 28, the transport efficiency of the container before filling the contents can be improved, and the bottom plate or the like when filling the contents can be improved. Work efficiency can be improved because there is no need to install.

Next, the synthetic resin container 300 and the manufacturing method thereof, which are the third embodiments of the present disclosure shown in FIGS. 15A to 22B, will be described in detail. Here, the differences from the first and second embodiments will be mainly described. The parts having the same functions as those of the first and second embodiments will be described with the same reference numerals.

The synthetic resin container 300 according to the third embodiment of the present disclosure shown in FIG. 15A has a tubular mouth portion 10 for discharging the contents and a body portion 20 having a climax tubular shape connected below the mouth portion 10. And have.

The body portion 20 is integrally formed with the mouth portion 10, and includes a side portion having a truncated cone shape that expands in diameter downward, and also has an opening 28 that leads to the outside at the lower end portion. The body portion 20 has an outer layer body 102 and an inner layer body 101 provided inside the outer layer body 102. As shown in FIG. 15A, the outer layer body 102 and the inner layer body 101 are provided over the entire height region of the body portion 20, respectively. The body portion 20 includes a peeling portion 22 in which the inner layer body 101 can be peeled from the outer layer 102 in the upper region connected to the mouth portion 10, and more specifically, the peeling portion inner body 22b can be peeled from the peeling portion outer body 22a. Is. Further, the body portion 20 includes a non-peeling portion 24 in which the inner layer body 101 does not peel off from the outer layer body 102 at the lower end portion. In the present embodiment, the non-peeling portion 24 is rolled (curled) outward in the radial direction in a state where the outer layer 102 and the inner layer 101 are laminated at the lower end of the body 20. .. As a result, the inner layer 101 is configured so as not to be peeled from the outer layer 102 in the non-peeling portion 24. That is, in the present embodiment, the non-peeling portion 24 is provided with a configuration (non-peeling means) in which the outer layer 102 and the inner layer 101 are not peeled by physical bonding based on the shape. However, the present invention is not limited to this aspect, and the non-peeling portion 24 may have a configuration other than the shape, for example, which does not peel off due to physical bonding or chemical bonding due to adhesive or heat. An 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 with the non-peeling portion 24 interposed therebetween.

The structure of the non-peeling portion 24 is not limited to the example of FIG. 15A, and may be configured so as not to be peeled off due to various other mechanical structures, bonds, or the like.

As shown in FIG. 15A, in the synthetic resin container 300 of the present embodiment, an opening 28 is formed at the lower end of the body portion 20 and is open to the outside in an initial state in which the contents are not filled. Further, the body portion 20 has a truncated cone side surface shape that expands in diameter downward, and the outer diameter of the upper portion of the body portion 20 is configured to be smaller than the inner diameter of the lower portion of the body portion 20. ing. Therefore, when the synthetic resin containers 300 shown in FIG. 15A are stacked in the vertical direction, the upper portion of the body portion 20 of the lower synthetic resin container 300 enters the inside of the body portion 20 of the upper synthetic resin container 300. be able to. Therefore, in the initial state, the plurality of synthetic resin containers 300 can be easily stacked in the vertical direction, so that the transport efficiency of the containers before filling the contents can be improved.

In the present embodiment, the peeled portion outer body 22a and the peeled portion inner body 22b have a layer structure as shown in FIG. 15C. That is, the peeled portion outer body 22a (outer layer body 102) is composed of one resin layer, and the peeled portion inner body 22b (inner layer body 101) is composed of two layers of resin layers 22b1, 22b2. Counting the configurations of these three layers from the outside, the peeled portion outer body 22a (outer layer body 102) becomes the first layer, the resin layer 22b1 becomes the second layer, and the resin layer 22b2 becomes the third layer.

As the material used for each resin layer, for example, high-density polyethylene (HDPE) is used for the peeled outer body 22a (first layer) and the resin layer 22b2 (third layer), and ethylene-is used for the resin layer 22b1 (second layer). Vinyl alcohol copolymer resin (EVOH) or nylon can be used. However, the present invention is not limited to the above-described embodiment, and for example, the peeled outer body 22a (first layer) and the resin layer 22b2 (third layer) may be made of other polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET). And other synthetic resin materials may be used. Further, different materials may be used for the peeled portion outer body 22a (first layer) and the resin layer 22b2 (third layer).

The inner layer body 101 extends beyond the upper end portion of the mouth portion 10 as the upper wall portion inner body 17b, and extends radially inward from the outer peripheral wall 11 of the mouth portion 10 as shown in FIGS. 15A and 15B. The mouth 10 is closed with. When the peeling rod 50 is inserted into the container from the mouth 10 of the synthetic resin container 300 and the inner layer 101 (upper wall inner body 17b) blocking the mouth 10 is pressed downward (see FIG. 16). ), The peeled inner body 22b of the peeled portion 22 of the body portion 20 connected thereto is peeled from the peeled outer body 22a and folded back toward the opening 28 (see FIG. 17). As a result, a storage space S for the contents defined by the peeled outer body 22a, the peeled inner body 22b, and the upper wall inner body 17b is formed in the body 20 of the synthetic resin container 300.

In the present embodiment, the inner layer 101 has two resin layers 22b1 and 22b2 as shown in FIG. 15C. However, from the viewpoint of easy viewing of the drawings, it should be noted that in the drawings other than FIG. 15C (FIGS. 15B, 22B, etc.), the inner layer 101 is drawn as one resin layer.

Next, the manufacturing method of the synthetic resin container 300 will be described in detail with reference to the flowchart of FIG.

When manufacturing the synthetic resin container 300, first, a sheet ST having an outer layer body 102 and an inner layer body 101 is created (step S301). The sheet ST has a three-layer structure shown in FIG. 15C, the outer layer 102 corresponds to the peeled outer body 22a (first layer), and the inner layer 101 corresponds to the resin layer 22b1 (second layer) and the resin layer 22b2. Corresponds to (third layer).

Next, as shown in FIG. 19, the sheet ST created in step S301 is heated and softened, and closely cooled in the cavity 241 of the thermoforming mold 240 to form the mouth portion 10, the body portion 20, and the mouth portion 10. The upper wall portion 17 that closes the upper end portion is formed (step S303).

After the container formed by thermoforming in step 303 is released, the unnecessary portion 27 of the lower end portion (upper end portion in FIG. 20) of the body portion 20 is excised along the cutting line CL (step S305).

Next, the lower end portion of the body portion 20 is subjected to a non-peeling treatment (see FIG. 21) of rolling (curling) the lower end portion into a roll shape using a roll jig 25 to form the non-peeling portion 24 (non-peeling means) (step S307). ). The lower end portion of the body portion 20 is gathered in a roll shape in the annular groove portion 25a provided in the roll jig 25 and processed so as to be difficult to peel off.

Next, the outer layer 102 is excised from the upper wall portion 17 formed at the upper end portion (lower end portion of FIGS. 21 and 22A) of the mouth portion 10 (step S309). This step is realized by, for example, a cutting means 60 (ultrasonic cutter) capable of applying ultrasonic vibration in the vertical direction to the blade portion 61 provided at the tip portion, as shown in FIGS. 22A and 22B. Can be done. By excising the outer layer 102, the upper end of the mouth 10 is closed only by the inner layer 101 (upper wall inner body 17b).

In the present embodiment, only the outer layer 102 is excised, but the present embodiment is not limited to this aspect. The resin layer 22b1 (second layer) of the inner layer 101 may be excised by the excision means 60 in addition to the outer layer 102, leaving only the resin layer 22b2 (third layer). The layer to be cut can be selected, for example, by accurately moving the tip of the blade portion 61 to the lower end of the layer to be cut (the upper end of FIG. 22B).

As described above, the present embodiment is a method for manufacturing a synthetic resin container 300 including a tubular mouth portion 10 and a body portion 20 connected below the mouth portion 10, wherein the outer layer body 102 and the inner layer body are formed. The mouth 10, the body 20, and the upper end of the mouth 10 are closed by the step of creating the sheet ST having 101 and the thermoforming in which the sheet ST is heated and softened and closely cooled in the thermoforming mold 240. The body portion 20 is provided so as to be connected to the mouth portion 10, and the inner layer body 101 is separated from the outer layer body 102, including a step of forming the upper wall portion 17 and a step of cutting off the outer layer body 102 in the upper wall portion 17. It has a possible peeling portion 22 and a non-peeling portion 24 provided at a position connected to the peeling portion 22 and having an opening 28 at a position separated from the peeling portion 22 and not peeling in the thickness direction, and the inner layer 101 is formed as an outer layer. By peeling from the body 102 and pushing the inner layer 101 of the upper wall portion 17 toward the opening 28, the outer layer 102 and the inner layer 101 are configured to be able to form a storage space S for the contents. By adopting such a configuration, by inserting another synthetic resin container 300 into the opening 28, the transportation efficiency of the container before filling the contents can be improved, and the bottom plate or the like when filling the contents can be improved. Work efficiency can be improved because there is no need to install.

Although the present disclosure has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and modifications based on the present disclosure. Therefore, it should be noted that these modifications 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 be logically inconsistent, and a plurality of components can be combined or divided into one. 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 outer layer 102 and the inner layer 101 are each configured to have one resin layer, but the present invention is not limited to this embodiment. At least one of the outer layer 102 and the inner layer 101 may be configured to have a plurality of resin layers.

Further, in the third embodiment, the body portion 20 is configured to have a three-layer structure including an inner layer body 101 composed of two resin layers, but the present invention is not limited to this embodiment. The body portion 20 may have a two-layer structure including one outer layer body 102 and one inner layer body 101, or may be configured to have a laminated structure of four or more layers.

10 Mouth 11 Outer wall 11a Male thread 15b Closure inner body 17 Upper wall 17b Upper wall inner body 18 Communication port 20 Body 22 Peeling part 22a Peeling part outer body 22b Peeling part inner body 22b1 Resin layer 22b2 Resin layer 24 Non-peeling part 24a Non-peeling part outer body 24a1 Outer body lower part 24b Non-peeling part inner body 25 Roll jig 25a Circular groove 26 Lower end 26a Lower end outer body 26b Lower end inner body 27 Unnecessary part 28 Opening 40 Insert molding die 41 Cavity 43 Core 50 Rod 60 Cutting means 61 Cutting tool 100, 200, 300 Synthetic resin container 101 Inner layer 102 Outer layer 140 Two-color molding die 141 Cavity 143 Core 240 Thermoforming die 241 Cavity CL Cutting line L Lubricant O1 center Axis S Containment space ST sheet

Claims (5)

With a tubular mouth
A synthetic resin container that is connected below the mouth portion and has a body portion having an outer layer body and an inner layer body provided inside the outer layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The peeled portion can be peeled off by applying a lubricant between the outer layer body and the inner layer body.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
A synthetic resin container characterized in that 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 extruding the inner layer body toward the opening side. With a tubular mouth
A synthetic resin container that is connected below the mouth portion and has a body portion having an outer layer body and an inner layer body provided inside the outer layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The outer layer body and the inner layer body are provided over substantially the entire height region of the body portion, respectively.
The outer layer body and the inner layer body are formed of different materials having low compatibility.
The non-peeling portion has a non-peeling means that does not peel the outer layer body and the inner layer body.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
A synthetic resin container characterized in that 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 extruding the inner layer body toward the opening side. An outer layer body having a tubular mouth portion and a body portion connected below the mouth portion,
A method for manufacturing a synthetic resin container including an inner layer provided inside the body of the outer layer.
The step of forming one of the outer layer body and the inner layer body,
It includes a step of using one of the outer layer body and the inner layer body as an insert material and insert molding the other.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
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 a portion that closes the mouth portion toward the opening side. A method for manufacturing a synthetic resin container. An outer layer body having a tubular mouth portion and a body portion connected below the mouth portion,
A method for manufacturing a synthetic resin container including an inner layer provided inside the body of the outer layer.
A step of molding one of the outer layer body and the inner layer body,
The outer layer body and the other of the inner layer bodies are molded in two colors in the same mold as the molding of one of the outer layer body and the inner layer body.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
The inner layer body extends beyond the upper end portion of the body portion and extends radially inward from the outer peripheral wall of the mouth portion to close the mouth portion.
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 a portion that closes the mouth portion toward the opening side. A method for manufacturing a synthetic resin container. With a tubular mouth
A method for manufacturing a synthetic resin container including a body portion connected below the mouth portion.
Steps to create a sheet with an outer layer and an inner layer,
A step of forming an upper wall portion that closes the mouth portion, the body portion, and the upper end portion of the mouth portion by thermoforming in which the sheet is heated and softened and closely cooled in the mold.
Including the step of excising the outer layer body in the upper wall portion.
The body is
A peeling portion provided so as to be connected to the mouth portion and capable of peeling the inner layer body from the outer layer body,
It has a non-peeling portion that is provided at a position connected to the peeling portion, does not peel in the thickness direction, and has an opening at a position separated from the peeling portion.
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 of the upper wall portion toward the opening side. A method for manufacturing a synthetic resin container.

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