JP2018203338A - Cap-engaging-plug-including paper-made container - Google Patents

Abstract

To obtain a cap-engaging-plug-including paper-made container in which virginity can be secured and to which a pouring plug of a larger port inner diameter can be fitted.SOLUTION: A lamination sheet which uses paper as a base material layer (12) and includes a sealant layer (13) constituted by thermoplastic resin at least at the inner surface is fused at both ends to make a tubular body. In a paper container in which both ends of the tubular body are closed, included is an opening part (110) to which a cap-engaging-plug (2) is fused at the upper pouring part. The cap-engaging-plug includes a lock ring (22) which is capable of engaging through plugging at the tip periphery, and includes, inside, a blocking plate (23) surrounded by a fragile part (231).SELECTED DRAWING: Figure 1

Description

  The present invention is mainly used for foods such as liquor, juice, lactic acid beverages, liquids and powders for non-food products such as shampoos, body soaps, house detergents, liquid fertilizers, herbicides, cat repellents, granular fertilizers, The present invention relates to a paper container using paper as a base material, which stores particles and the like.

Conventionally, laminated sheets used for paper containers are made of paper as a base material and at least the innermost surface, usually the innermost surface and the outer surface are made of polyolefin resin with excellent heat sealability, depending on the components of the contents. Has been added a layer imparting gas barrier properties. For example, juice and alcoholic beverages consist of laminated sheets such as [container outside] polyethylene / paper / polyethylene / inorganic oxide vapor deposition layer / polyethylene terephthalate film / polyethylene [container inside]. Such a configuration is widely used as a container for filling with a fragrance-retaining material or a content that easily oxidizes.
Usually, after such a laminated sheet is punched out, it is formed into a paper container molded into a square column having a top surface of a so-called triangular roof shape, or a flat top type, that is, a paper container molded with a flat top surface. Used.
However, such a paper container is a container that has high fusing properties and is difficult to open in order to improve the drop strength and the like.

  In order to solve such a problem, in Patent Document 1, a hole is previously drilled at a planned opening position, and a thermobonding film or a laminated aluminum foil is bonded to the opening. A container with a spout is formed by welding a spout stopper body that is tightly fitted to the inner wall so that it can be slid up and down with a flange that extends outward from the lower end of the spout, and a cap is fitted on the top end of the spout stopper body. is suggesting.

This container is provided with a plurality of triangular teeth at the lower edge of the opening stopper plug set in the spout stopper, and the opening stopper cuts and opens the film and laminated aluminum foil to ensure virginity. Designed for easy opening.
However, since this spout stopper is welded at the flange part in the state that the stopper or cap is set during opening, it is necessary to make the welding inner diameter larger than the jig holding the stopper, and the outer diameter of the flange is It is necessary to further increase the welding width, and as a result, there is a problem that the inner diameter cannot be increased.

  In Patent Document 2, a container with a spout stopper is provided with a spout stopper mounting hole at the top of a liquid paper container, and the spout stopper is attached to the spout stopper mounting hole by ultrasonic welding via a flange portion. As the stopper, a liquid paper container with a spout stopper has been proposed which has a pedestal extending from a flange part and a sealing plate part that tears and opens an annular score part in the lateral direction of the inner periphery of the pedestal.

Since this paper container tears and opens the annular score part at the periphery of the sealing plate part provided in the spout stopper, it can secure virginity and can be easily opened by tearing the annular score part. Easy to design.
However, since this spout plug is also welded at its flange with the lid set, it is necessary to have a larger welding inner diameter than the jig that holds them, and the outer diameter of the flange is further welded. It is necessary to increase the width.
However, the surface on which the spout stopper is welded is slightly larger than the half of the inclined surface of the paper container in the case of the govel top type, and half that does not overlap the double of the cross section of the paper container in the case of the flat top type. It is necessary to weld the spout flange to the surface. For this reason, it is necessary to suppress the width to almost half or less of the cross section of the paper container, and there is a problem that the inner diameter cannot be increased similarly.
In addition, as described above, since the welding inner diameter is larger than that of the jig for holding the lid, and the flange outer diameter is set on the outer side, the spout has a very large flange.
However, when the inner diameter of such a spout cannot be increased, liquids with high viscosity, powders, granules, and the like are difficult to discharge, and thus are difficult to use for containers that contain such contents. In addition, it is not possible to use a multi-hole perforated discharge plug that is convenient when discharging the contents to be sprayed. Furthermore, when adopting a pull-top structure that enhances virginity and openability, since the mouth diameter of the spout stopper is small, there are many restrictions such as the pull ring being small and difficult to open for people with thick fingers. There was a problem of narrowing the application range of the container.

Japanese Utility Model Publication No. 58-37828 JP 2002-19816 A

  Accordingly, it is an object of the present invention to obtain a paper container with a cap fitting for cap fitting which can secure a virgin property and can be attached with a pouring tap having a large inner diameter in a paper container such as a gobeltop type or a flat top type. It is.

  The present invention relates to a paper container in which both ends of a laminated sheet having a paper base and at least an inner surface having a sealant layer made of a thermoplastic resin are welded to form a cylinder, and both ends of the cylinder are closed. The outlet has an opening for welding the cap fitting cap, and the cap fitting plug has a locking ring that can be plugged on the outer periphery of the tip, and has a closing plate surrounded by a weak portion on the inside. It is a paper container with a cap for cap fitting characterized by having.

The paper container of the present invention is fused with the paper container by attaching a cap fitting cap having a simple structure having a locking ring that can be plugged on the outside and a closing plate surrounded by a weak portion on the inside to the paper container. It is possible to adopt a narrow flange that does not increase the flange to be worn.
Therefore, it is possible to increase the inner diameter of the mouth, ensure virginity, and engage various caps such as hinge caps, perforated caps, small hole caps, and large diameter caps with the locking ring as required. It can be poured out and re-sealed with a cap.

Fig. 2 is a longitudinal sectional view of the fitting cap and the cap in the paper container with a cap fitting mouth cap of the present invention, and a longitudinal sectional view showing a state in which the fitting cap is opened and a hinge cap as an example of the cap is fitted thereto. It is. In the paper container with a cap fitting cap of the present invention, it is a cross-sectional view showing a process of pulling up the pull ring and opening the fitting plug. It is sectional drawing which shows the process of stoppering a hinge cap to the opening stopper for fitting by the paper container with a stopper stopper for cap fitting of this invention. It is sectional drawing which shows the state which opened and opened the cover part of the hinge cap plugged in the opening stopper for fitting by the paper container with a stopper fitting cap of this invention. It is a longitudinal cross-sectional view of the cap plugged with the screw cap which has a lid body screwed with the opened fitting cap with the screw in the paper container with a cap fitting cap of the present invention. In the paper container with a cap fitting cap of the present invention, a hinge cap having a perforated face plate with a perforated hole and a hinge cap having a small-diameter pouring hole are plugged and fitted into the opened fitting cap. It is a longitudinal cross-sectional view of the stopper plug.

Embodiments of a cap-fitting paper container with a cap of the present invention will be described below in detail with reference to the drawings.
FIG. 1-1 is a longitudinal sectional view of a cap fitting cap 2 and a hinge cap 3 in the paper container 1 with a cap fitting plug of the present invention, and FIG. It is a longitudinal cross-sectional view which shows the state which fitted the cap 3 by the stopper.
The paper container of the present invention has paper as a base material layer 12 and at least both inner surfaces of a laminated sheet having a sealant layer 13 made of a thermoplastic resin are welded to form a cylinder having a quadrangular cross section. It is a paper container formed by closing both ends of the shape, and is generally a paper container called a gobel top type or a flat top type.
In the paper container 1, an opening 110 is opened in an upper dispensing portion 11.
The flange 21 of the cap fitting plug 2 is welded to the inner surface side of the laminated sheet near the opening 110.
The cap fitting cap 2 has a pour tube 20 and a flange 21 on the outer bottom end of the pour tube 20, and a closing plate 23 surrounded by a fragile portion 231 on the inner bottom end of the pour tube 20. doing.
A locking ring 22 that can be fitted by a stopper is provided on the outer periphery of the tip of the dispensing tube 20, a gap spaced apart by the thickness of the laminated sheet is provided above the flange 21, and a paper retaining rib 24 is provided. Yes.
The paper retaining rib 24 has an inclined surface upward so that the opening 110 processed into the laminated sheet can be easily inserted, and has an outer diameter larger than that of the opening 110.
As shown in FIG. 1A, the cap-fitting paper container 1 with a cap fitting of the present invention is filled with the contents and sealed with a filling port with the cap-fitting mouth plug 2 welded to the paper container 1. . The hinge cap 3 is transported and sold as a set product attached to the cap fitting paper container 1 with a cap.

FIG. 1-2 is a longitudinal sectional view showing a state in which the hinge cap 3 is fitted with a stopper after opening the inside of the dispensing tube 20 of the cap fitting plug 2 in the paper container with a cap fitting plug of the present invention. FIG. 5 is a longitudinal sectional view of the cap fitting plug 2 showing a storage form with the lid 34 closed.
The locking ring 22 engages with a locking projection 31 on the inner surface of the hinge cap so that the hinge cap 3 and the cap fitting port plug 2 can be fitted. Sealing is possible between the cap 3 and the cap fitting plug 2 so that leakage such as liquid leakage does not occur.
In this cap-fitting paper container with a cap, it is not necessary to adjust the direction of the hinge of the cap at the time of manufacture, and it is easy to change the direction of the hinge cap after fitting the cap. It is possible to manufacture without having to consider the direction.

FIG. 2 is a cross-sectional view of the fitting plug showing the process of breaking the fragile portion 231 on the periphery of the closing plate 23 and opening the fitting plug in the paper container with a cap fitting plug of the present invention.
The cap fitting cap 2 of the present invention has a pull ring 232 in the vicinity of the end of the closing plate 23 that covers and closes the entire inside of the dispensing tube 20 via a support column. In order to open, the pull ring 232 is pulled up, the weakened portion 231 at the periphery of the closing plate 23 is broken, and the closing plate 23 closing the spout 20 is removed from the dispensing tube 20 and opened.
The pull ring 232 is connected to the end of the closing plate 23 by a support column, and when pulling up the pull ring 232, a force is applied to concentrate on a part of the fragile portion 231 via the support column. Can also start breaking. Further, since the fragile portion 231 is only torn in order from the broken portion, the closing plate 23 can be easily opened and removed.

FIG. 3 is a cross-sectional view showing a step of plugging the hinge cap 3 into the fitting cap from which the closing plate 23 has been removed in the paper container with a cap fitting cap of the present invention.
By placing the hinge cap 3 on the upper end of the cap fitting stopper 2 and pressing it firmly, the entire side wall with the locking projection 31 of the hinge cap 3 opens momentarily to the outside, over the locking ring 22 and fitted. I can do it.

FIG. 4 is a paper container with a cap fitting cap of the present invention, and shows a state in which the lid portion 34 of the hinge cap 3 that is locked to the cap fitting cap 2 is rotated and opened about the hinge 33. It is sectional drawing.
The hinge cap 3 has a lid portion 34 on the outer side, can rotate around the hinge 33, and the inner periphery of the side wall 341 of the lid portion 34 is fitted into a fitting ring 35 on the top surface of the cap body 30. In addition, the inner ring 342 can be doubly fitted to the inner surface of the tip of the pouring hole 36 of the cap body 30 and can be resealed.

FIG. 5 is a longitudinal cross-sectional view of a cap plugged with a cap body 401 having a lid body 402 that is screwed to the opened fitting cap with a screw in the paper container with a cap fitting cap of the present invention. The process of removing the body 402 is shown.
The screw cap 4 has a rotation-preventing recess 403 fitted into a rotation-preventing rib 221 that can prevent rotation at the lower end of the locking ring of the fitting plug, and the cap body 401 is rotated by the rotation of the lid body 402. To prevent it from rotating.
The lid 402 is a cap that can be removed from the cap body 401.

FIG. 6 is a paper container with a cap fitting cap of the present invention. FIG. 6-1 is a cap in which a hinge cap having a pouring face plate made of a porous hole is plugged and fitted to the opened fitting cap. It is a longitudinal cross-sectional view of the vicinity.
Mainly a cap for powder or granules, and has a pouring surface plate 361 covering the pouring hole at the lower end of the pouring hole 36 or the upper end of the pouring hole 36 of the hinge cap body, and is stored in the pouring surface plate. A plurality of small holes 362 that are large enough to prevent clogging of the powder and granules of the content to be processed are provided.
When the pouring face plate is provided at the upper end of the pouring hole, the inner ring is brought into contact with the outside of the pouring hole.
This hinge cap is suitable for evenly spraying particulate matter and powder, and since the lid portion is connected to the cap body by the hinge, there is no fear of losing the lid portion.

FIG. 6B is a longitudinal cross-sectional view of a plug in which a hinge cap having a small-diameter extraction hole 36 is plugged and fitted.
The cap is used mainly for powders, granules, and liquids used in small quantities. The top plate of the cap body is wide. The hinge cap can be provided with a long pouring hole or a protrusion that prevents liquid dripping around the pouring hole.
This hinge cap also has a possibility that it will drop or disappear because the lid is connected to the cap body by a hinge.

The structure of the laminated sheet used in the cap-fitting paper container for cap fitting of the present invention may be one using a thermoplastic resin on the outermost surface and the innermost surface, and using paper as a base material. In order to enhance the performance, a structure having a polyethylene terephthalate layer or a layer containing a polyethylene terephthalate film having a vapor deposition layer such as silicon oxide or aluminum in the layer structure, or a sealant layer provided inside the polyethylene terephthalate layer It may be a configuration.
For example, polyethylene / paper / polyethylene / polyethylene terephthalate / sealant,
Polyethylene / paper / polyethylene / inorganic oxide-deposited polyethylene terephthalate / sealant,
Polyethylene / paper / polyethylene / aluminum-deposited polyethylene terephthalate / sealant,
Polyethylene / paper / polyethylene / aluminum foil / urethane adhesive / polyethylene terephthalate / sealant,
Such a configuration is conceivable.

As the front side thermoplastic resin in the laminated sheet of the paper container, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, ethylene / propylene copolymer and the like can be used in addition to low density polyethylene.
Further, the thickness of the base paper is adjusted according to the container capacity, and the thickness is increased as the paper container capacity is increased. Usually, the basis weight which is the thickness of paper can be used in the range of 200 g / m ² to 500 g / m ² .

In addition to low-density polyethylene, thermoplastic resins such as linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, and ethylene / propylene copolymer can be used as the innermost sealant layer in the laminated sheet of paper containers. .
The thickness of the sealant layer used for the innermost layer is suitably 20 μm to 80 μm, preferably 30 μm to 70 μm, and the thickness of the outermost surface side thermoplastic resin is 5 μm to 60 μm, preferably 10 μm to 40 μm.

The material of the cap fitting cap is a material that has good weldability with the sealant layer used in the container body, high resistance to stress cracking, is hardly affected by the contents, and has an appropriate rigidity. There must be something easy to capping.
Furthermore, since a pull ring is formed in the cap fitting cap, the tensile strength needs to be high, and the thin fragile portion provided in the ring must have various characteristics that break with a certain tensile strength. Also, the fluidity at the time of melting (melt flow index) needs to be high.
Therefore, materials that can be used for cap fitting caps are low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, mixed resin of low-density and high-density polyethylene, ionomer resin, and ethylene vinyl acetate copolymer. And the like added and mixed with the above.
In actual use, after molding using various resins, it is welded to the paper container main body, and the contents to be filled are used to conduct an environmental stress cracking test and make a judgment.
The material of the cap fitting cap is molded by injection molding and welded to the opening for attaching the cap in the sleeve state in which the side end of the paper container is molded.

Similarly, the cap material that fits into the cap fitting cap is highly resistant to stress cracking, is not easily affected by the contents, is moderately rigid and flexible, and should be easily capped. is necessary.
In particular, when the cap is integrated with a lid such as a hinge cap, the fluidity (melt flow index) at the time of melting must be high. Moreover, it is preferable to change a material from the cap fitting cap from insertion property.
The materials that can be used for the cap are low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, mixed resin of low-density and high-density polyethylene, ionomer resin, ethylene vinyl acetate, as well as the fitting plug. A resin obtained by adding and mixing a copolymer to the above. Among these, linear low density polyethylene is preferable. In actual use, after molding using various resins, the cap is inserted into a cap fitting cap, and the content to be filled is used to conduct an environmental stress cracking test to make a judgment.
The above cap material is formed by injection molding and is plugged into a cap fitting cap of a paper container.

To attach a hinge cap to a paper container with a cap fitting cap, pack the hinge cap to be fitted in a polyethylene bag, etc., and place it hot above the paper container on the side where the cap fitting cap is not welded. It may be attached in a temporarily fixed state by pseudo welding with a melt adhesive or the like.
The paper container with the hinge cap temporarily fixed may be further covered with a shrink film. By covering the entire paper container with the shrink film, the virginity and hygiene of the paper container and the hinge cap can be ensured.
In addition, since the cap fitting cap and the hinge cap are configured separately, it is possible to manufacture without considering the direction alignment of the cap at the time of manufacturing, improving productivity and allowing the consumer to store the contents. It is possible to adopt a mechanism that allows the direction of the hinge cap to be adjusted freely so that it can be easily poured out.
Further, when the container is disposed, there is an advantage that the hinge cap can be easily removed from the paper container and separated and disposed as plastic.
Moreover, it is also possible to sell it for refilling without attaching a hinge cap in the state of a paper container with a cap fitting cap. In addition to the stopper cap, it is possible to use a screw cap as the cap that fits into the cap fitting cap. Furthermore, the shape of the spout tip can be changed according to the viscosity and usage. By replacing with a type of overcap, it can be developed for various uses.
For this reason, cap-fitting paper containers with caps can be used in common for different contents, and can be used in a variety of applications with high mass productivity and easy handling of various types and small quantities. .

The paper container of the present invention is as described above, ensuring virginity and increasing the inner diameter of the mouth. Since the inner diameter of the mouth is large, after opening, various caps such as a hinge cap, a perforated cap, a small hole cap, and a large diameter cap can be fitted and re-sealed.
For this reason, it can be used not only for general liquids but also for liquids with high viscosity, powders, granules, etc., which are difficult to handle with a small spout or a small cap.
Furthermore, the production line used for the conventional paper container can be used without major change, and the same cap fitting plug can be used only by changing the attached cap.
As described above, the cap-fitting paper container with a cap fitting of the present invention has a great merit that it can handle many kinds of contents in the same line.

DESCRIPTION OF SYMBOLS 1 ... Paper container 11 ... Extraction part 110 ... Opening part 12 ... Base material layer 13 ... ··· Sealant layer 2 ········ Cap plug 20 ··················································· Flange 22 ... Ring ring 221 ..... Rotation prevention rib 23 ..... Closing plate 231 ..... Fragile part 232 ..... Pull ring 24. ······ Paper retaining rib 3 ·················································· Cap body 31 ············································································································································································ ... · Fitting ring 36 ··························································································· 401... Cap body 402... Lid 403.

Claims (4)

  A paper container having a paper base and at least the inner surface having a sealant layer made of a thermoplastic resin is welded at both ends to form a cylinder, and the cylindrical container is closed at both ends. An opening for welding a fitting plug is provided, the cap fitting plug has a locking ring that can be fitted by a stopper on the outer periphery of the tip, and has a closing plate surrounded by a weak portion on the inside. A paper container with a cap for cap fitting characterized by the above.   2. The paper container with a cap fitting for cap fitting according to claim 1, wherein a pull ring is provided near the end of the closing plate via a support column, and the pull ring is pulled up so that the hole can be opened.   The paper container with a cap fitting for cap fitting according to claim 1 or 2, wherein a stopper cap fitting hinge cap is attached to the paper container.   The screw cap comprising: a screwing lid, and a cap body having a threaded portion to be screwed to the lid and a stopper fitting fitting ring, is attached to the paper container. 2. A paper container with a cap for cap fitting according to 2.

Images