JP2022124704A - tube container - Google Patents

Abstract

To provide a tube container capable of separating a film constituting a trunk from paper.SOLUTION: A tube container is composed of a pouring port portion having a cylindrical pouring tube portion and a flange portion extending outward from one end of the pouring tube portion, and a sheet including a paper layer and an innermost sealant layer, and has a tube-shaped trunk having one end closed and a predetermined range from the other end sealed to the flange portion, wherein the trunk has a plurality of ruled lines extending in a longitudinal direction of the trunk.SELECTED DRAWING: Figure 1

Description

The present invention relates to tube containers.

BACKGROUND ART Tube containers made mainly of resin are widely used as packaging materials for pharmaceuticals, cosmetics, foods, and the like. For example, Patent Literature 1 describes a tube container composed of a pouring unit for extracting the contents and a body welded to the pouring unit and containing the contents.

JP 2016-199280 A

Tube containers are used in a wide variety of applications, and there is a demand for improved design in order to differentiate them from other products.

Therefore, an object of the present invention is to provide a tube container with excellent design.

The tube container according to the present invention includes a pouring tube portion having a tubular shape, a pouring port portion having a flange portion extending outward from one end of the pouring tube portion, a paper layer, and a sealant layer as the innermost layer. one end of which is closed and a predetermined range from the other end of which is sealed to the flange; the body is provided with a plurality of ruled lines extending in the length direction of the body ing.

ADVANTAGE OF THE INVENTION According to this invention, the tube container excellent in design property can be provided.

The front view which shows schematic structure of the tube container which concerns on embodiment. The perspective view of the spout part shown in FIG. End view along line III-III shown in FIG. Sectional drawing which shows an example of the sheet|seat which comprises the trunk|drum of a tube container A view showing the barrel before welding the spout Diagram showing the tube container after spout welding Diagram showing tube container after filling with contents Diagram showing a conventional tube container after filling with contents Diagram showing a tube container when the remaining content is extremely low Sectional view of the body of the tube container

FIG. 1 is a front view showing a schematic configuration of a tube container according to an embodiment, FIG. 2 is a perspective view of the spout portion shown in FIG. 1, and FIG. It is an end view along the line. 2 and 3 show the state before sealing the barrel to the spout. In FIG. 1 and subsequent figures, dotted lines indicate valley folds, and dashed lines indicate mountain folds.

The tube container 100 includes a tubular body 1 and a spout 2 attached to the body 1 .

The body portion 1 is a member for containing contents, and is formed by bonding together the edges of a sheet having a pair of substantially parallel edges. As a method of bonding, for example, the inner surfaces of band-shaped regions including a pair of edges of the sheet are butted against each other and welded together, or the outer surface of the band-shaped region including one edge of the sheet, A method such as envelope pasting, in which the inner surface of a band-shaped region including the other edge of the sheet is pasted together, or pressing tape pasting, in which abutting portion where both ends of the sheet are butted against each other is sealed with a tape material, is used. By bonding using these methods, a bonded portion 7 (a back bonded portion) is formed on the trunk portion 1 . In the case of joining hands together, the bonded portion 7 may be bent along the outer surface of the body portion 1 and bonded to the body portion 1. For example, the entire surface or part of the film constituting the body portion 1 may They may be welded via a heat-sealing resin provided, or may be bonded via an adhesive such as hot melt.

One end 5a (lower end in FIG. 1) of the body 1 is sealed and closed. On the other hand, the portion near the other end 5b (upper end in FIG. 1) of the body portion 1 is sealed to the outer surface 8 of the flange portion 4, which will be described later, in a folded state. A plurality of pleats 12 are formed in the welded portion between the body portion 1 and the flange portion 4 by folding a sheet forming the body portion 1 .

A plurality of ruled lines 20 extending in the length direction of the body portion 1 are provided on the body portion 1 . The trunk portion 1 can be bent along the ruled lines 20 . The crease 20 is classified into a crease 20a and a crease 20b. A first crease 21 is a valley fold along the crease 20a, and a second crease 22 is a mountain fold along the crease 20b. and That is, by folding the ruled line 20, the first fold line 21 or the second fold line 22 is formed. Here, the valley fold is a folding method in which the fold protrudes inward from the body 1, and the mountain fold is a fold in which the fold protrudes outward from the body 1. It's about folding. The first fold line 21 and the second fold line 22 may be folded by different amounts depending on the amount of the contents of the tube container 100. For example, the fold amount increases as the remaining amount of the contents decreases. When this happens, the volume of the tube container 100 becomes smaller. Further, the crease 20 or the first fold 21 and the second fold 22 may be provided along the length of the body 1 as shown in FIG. may be provided only in a predetermined range from .

The first fold line 21 and the second fold line 22 may be provided so that the end portion 5a side portion of the trunk portion 1 is formed in a gusset shape, as shown in FIG. 1, for example. In this case, the first crease 21 and a pair of second creases 22 parallel to the first crease 21 and symmetrical about the first crease 21 form part of the body 1 and A total of 6 creases are provided on the other part facing this, respectively. When the end portion 5a side portion of the body portion 1 is formed in a gusset shape, the end portion 5a is closed by a gusset seal. Even in the case of forming a gusset, the ruled line 20 or the first and second folds may be provided only within a predetermined range from the end 5a of the body 1, for example.

The spout portion 2 is a spout for extracting the contents accommodated in the body portion 1 to the outside, and includes a tubular spout portion 3 and a flange portion 4 . The flange portion 4 is a flat plate-like portion that is connected to one end portion 6 a (lower end in FIG. 1 ) of the pouring tube portion 3 and extends outward from the pouring tube portion 3 . In this embodiment, the flange portion 4 is formed so as to extend in a direction (horizontal direction in FIG. 1) orthogonal to the axial direction of the pouring cylinder portion 3 . In this embodiment, the flange portion 4 is formed in an annular shape, but as long as the body portion 1 can be joined, the shape of the flange portion 4 is not limited. It may be rectangular or the like.

The spout portion 2 may be molded from a thermoplastic resin, or may be molded from a material containing a filler other than a thermoplastic resin and a resin. As the thermoplastic resin used for the material of the spout portion 2, for example, any one of polyethylene, polypropylene, polyester, polyamide and cyclopolyolefin, or a combination of two or more thereof can be used. As the filler, any one of talc, kaolin, paper powder, and cellulose fiber can be used, or two or more of them can be used in combination. By using a mixture of a thermoplastic resin and a filler other than resin as a material for the spout portion 2, the amount of resin used can be reduced while maintaining moldability and thermal adhesion to the sheet material of the body portion 1. becomes possible. The molding method of the spout portion 2 is not particularly limited, but existing molding methods such as injection molding, thermoforming such as vacuum molding and hot plate pressure molding, and compression molding can be used.

As shown in FIGS. 2 and 3, an annular projection 9 and a recess 10 are provided on the outer surface 8 of the flange portion 4 (the surface on the end portion 6b side of the pouring tube portion 3). When the barrel portion 1 is welded to the flange portion 4 of the spout portion 2 , the convex portion 9 melts first, and the molten resin spreads between the inner surface of the barrel portion 1 and the flange portion 4 . Also, part of the melted resin flows into the concave portion 10 . As a result, the inner surface of the body portion 1 and the outer surface 8 of the flange portion 4 can be welded to each other through the melted resin of the convex portion 9, and the welding strength can be improved.

Ultrasonic welding, high-frequency welding, heat seal welding, hot air welding, compression molding of a barrel insert, etc. can be used as a method for welding the barrel 1 and the spout 2 when manufacturing the tube container 100. It is preferable to employ ultrasonic welding because it is less affected by the heat insulating properties of paper.

As shown in FIG. 1, the tube container 100 may further include a screw cap 11 that can be attached to and detached from the ejection tube portion 3 of the ejection port portion 2 by screwing. When the tube container 100 is provided with the screw cap 11, it becomes easy to reseal the tube container 100 after opening.

Also, the tube container 100 may be provided with a hinge cap instead of the screw cap 11 . When a hinge cap is provided, the hinge cap may be attached to the spout portion 2 by screwing onto the spout portion 3 shown in FIG. Alternatively, a rib may be provided on the outer surface of the pouring tube portion 3 instead of the screw thread, and the hinge cap may be attached to the pouring port portion 2 by fitting through the rib. Moreover, the tube container 100 may be provided with a cap that is fitted to the dispensing tube portion 3 by plugging instead of the screw cap 11 .

Moreover, the end portion 6b of the pouring tube portion 3 may be sealed with a film that closes the pouring tube portion 3 when the tube container 100 is in an unopened state.

Furthermore, the inside of the pouring tube part 3 may be closed by a partition wall in order to keep the inside of the tube container 100 sealed when the tube container 100 is in an unopened state. When a partition is provided, it is preferable to provide a circular half-cut along the inner periphery of the pouring cylinder part 3 and to provide a pull ring connected to the portion surrounded by the half-cut. With this configuration, when the tube container 100 is opened, the user pulls the pull ring to break the half-cut portion of the partition wall, thereby removing a portion of the partition wall surrounded by the half-cuts and leaving the body portion. An opening can be formed for pouring the contents from 1 to the pour tube 3 .

FIG. 4 is a cross-sectional view showing an example of a sheet forming the body of the tube container.

A body portion 1 of the tube container 100 is composed of a sheet 41 . The sheet 41 is a multilayer sheet in which the base film layer 33, the barrier layer 34 and the sealant layer 35 are laminated in this order on one side of the paper layer 32, and the paper protective layer 37 is laminated on the other side of the paper layer 32. is. Also, an ink layer and an overcoat varnish layer may be further laminated on the paper protective layer 37 . An adhesive may be used between the layers to adhere the layers together. The details of each layer will be described below.

(paper layer)
The paper layer 32 is a structural layer that imparts strength and stiffness to the tube container 100 . The type of paper forming the paper layer 32 is not particularly limited, but it is preferable to use single-glazed kraft paper or double-glazed kraft paper in terms of strength, bending resistance, and printability. As the paper forming the paper layer 32, water-resistant paper, oil-resistant paper, cup base paper, or the like may be used as necessary. A single-layer kraft paper is particularly preferred in order to suppress the separation of the layers from the end faces.

The basis weight of the paper used for the paper layer 32 is 30-300 g/m ² , preferably 50-150 g/m ² . If the basis weight of the paper used for the paper layer 32 is less than 30 g/m ² , the stiffness of the body portion 1 is insufficient. In order to compensate for stiffness, for example, it is necessary to increase the thickness of the resin film provided inside the paper layer 32, but this leads to an increase in the resin ratio, which is not desirable in terms of reducing the environmental load. In addition, when the basis weight of the paper used for the paper layer 32 exceeds 300 g/m ² , the stiffness of the paper becomes too strong, resulting in poor tube-making and bag-making properties. It becomes difficult to bend. Furthermore, the heat insulating property is increased, so that the welding property is deteriorated, and the manufacturing cost is increased, which is not preferable. Moreover, the mass of the cellulose fibers contained in the paper layer 32 is 50% or more of the total mass of the paper layer 32 .

(Base film layer)
The base film layer 33 is a layer that imparts physical strength such as heat resistance and toughness to the sheet 41 . The base film layer 33 is also a layer that serves as a base material for the barrier layer 34 . The material of the film constituting the base film layer 33 is not particularly limited, but from the viewpoint of heat resistance and physical strength, it is preferable to use a stretched film of polypropylene, polyester, polyamide, or the like.

(barrier layer)
The barrier layer 34 is a functional layer that blocks oxygen, water vapor, etc. to improve the storage stability of the contents. The barrier layer 34 is, for example, one of vapor deposited films of inorganic compounds such as silica and alumina, vapor deposited films of metals such as aluminum, metal foils such as aluminum, plate-like minerals and/or coating films of a barrier coating agent containing a barrier resin. It can consist of more than one species. Ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride (PVDC), etc. can be used as the barrier resin used for the barrier coating agent, and binder resins other than the barrier resin can be used as appropriate for the barrier coating agent. blended. The barrier layer 34 may be laminated in advance on the base film layer 33 to form a barrier film, or may be provided as a single layer film.

(sealant layer)
The sealant layer 35 is a layer provided for welding the bonding portion 7 and the spout portion 2 to the body portion 1 . Although the material of the sealant layer 35 is not particularly limited, thermoplastic resins such as polypropylene, polyethylene, cyclic polyolefin, and polyester are preferable. The sealant layer 35 uses a resin having a softening temperature lower than that of the base film layer 33 by 20° C. or more. If the softening temperature of the sealant layer 35 is not lower than the softening temperature of the base film layer 33 by 20° C. or more, the possibility of the base film layer 33 softening and pinholes occurring during sealing is increased, which is not preferable. The softening temperature of the sealant layer 35 is preferably 40° C. or more lower than the softening temperature of the base film layer 33 .

The thermoplastic resin used for the sealant layer 35 may be any material as long as it has adhesiveness to the thermoplastic resin constituting the material of the spout portion 2 described later, but the same material as the thermoplastic resin used for the spout portion 2 is preferably By using the same thermoplastic resin for the sealant layer 35 and the thermoplastic resin layer for the spout portion 2, the sealing strength between the body portion 1 and the spout portion 2 can be improved.

(Paper protective layer)
The paper protective layer 37 is a layer for protecting the paper layer 32 constituting the sheet 41 from adhesion of contents and stains. Although the material and formation method of the paper protective layer 37 are not particularly limited, the paper protective layer 37 can be laminated by extrusion coating of a thermoplastic resin or coating with a coating agent such as a water-resistant agent or an oil-resistant agent. The thickness of the paper protective layer 37 is preferably 0.2-50 μm, more preferably 0.5-20 μm. When the thickness of the paper protective layer 37 is less than 0.2 μm, pinholes may occur in the paper protective layer 37, and the protection of the paper layer 32 may become insufficient. Moreover, if the thickness of the paper protective layer 37 exceeds 50 μm, it is not preferable in terms of the amount of resin used and the manufacturing cost.

An ink layer and an overcoat varnish layer may be laminated on the paper protective layer 37 if necessary. The ink layer is a layer applied by printing to perform various displays, and the overcoat varnish layer is a layer for imparting abrasion resistance and the like. The order of stacking the ink layer and the overcoat varnish layer on the paper protective layer 37 is not critical. Moreover, the overcoat varnish layer may also serve as the paper protective layer 37 .

The thickness (total thickness) of the sheet 41 forming the body portion 1 is not particularly limited, but is preferably 30 to 300 μm. If the thickness of the film forming the body portion 1 is within this range, the body portion 1 can be easily processed using a bag-making machine, a pillow/stick packaging machine, or the like. In addition, since the paper layer 32 imparts strength and stiffness, the tube can be made thinner and the amount of resin used can be reduced compared to a general laminated tube (300 to 500 μm thick).

In order to reduce the resin ratio of the sheet 41 that constitutes the body portion 1 , it is preferable that the paper layer 32 accounts for 50% or more of the mass of the sheet 41 . From the viewpoint of reducing the amount of resin used, it is preferable that the ratio of the paper layer 32 is as high as possible.

One or more layers other than the paper layer 32 and the sealant layer 35 may be omitted from the sheet 41 forming the body portion 1 . As a specific configuration example of the seat 41, the following can be given.
Configuration example 1: paper layer (70 g/m ² )/transparent vapor-deposited PET (12 μm)/NY (15 μm)/PE (50 μm)
Configuration example 2: paper layer (120 g/m ² )/transparent vapor deposited PET (12 μm)/NY (15 μm)/PE (50 μm)
Configuration Example 3: Paper layer (150 g/m ² )/PE (50 μm)/EVOH (30 μm)/PE (50 μm)
Configuration example 4: PE (30 μm)/paper layer (150 g/m ² )/PE (50 μm)/EVOH (30 μm)/PE (50 μm)
Configuration example 5: PE (30 μm)/paper layer (200 g/m ² )/PE (50 μm)

Next, a method for manufacturing the body portion 1 of the tube container 100 will be described. FIG. 5 is a view showing the barrel before the spout is welded. FIG. 6 is a diagram showing the tube container after the spout portion is welded. FIG. 7 is a diagram showing the tube container after being filled with contents. FIG. 8 is a diagram showing a conventional tube container after filling with contents. FIG. 9 is a diagram showing the tube container when the remaining content is extremely low. FIG. 9 is a cross-sectional view of the body of the tube container. FIG. 10 is a cross-sectional view of the body of the tube container. 7(a), 8(a), and 9(a) show front views of respective tube containers, and FIGS. 7(b), 8(b), and 9(b) show shows a side view of each tube container. In the following description, it is assumed that the body portion 1 of the tube container 100 is formed into a gusset shape.

First, ruled lines 20 are added to the sheet 41 . When forming a gusset on the body portion 1, the ruled line 20 is a pair of ruled lines 20a parallel to and symmetrical about the ruled line 20a as shown in FIGS. 5(a) and 5(b). Ruled lines 20b and 20b are provided on a portion of the body portion 1 and on another portion thereof, respectively. That is, a total of six ruled lines 20 are formed on the sheet 41 . At this time, the ruled line 20 may be provided along the length direction of the trunk portion 1 or may be partially provided such as only near the end portion 5 a of the trunk portion 1 .

The ruled lines 20 can be formed, for example, by pressing the roll material from above and below with male and female plates when the sheet 41 is in the state of a roll material. At this time, continuous lines may be applied using a rotary creasing device or the like, or partial lines may be applied using an embossing machine or the like. Costs can be reduced by continuous wiring with a rotary system. By forming a line by embossing, for example, the line can be formed only in a specific portion such as only near the end portion 5a. In addition, by combining the continuous line drawing method and the embossing process, the degree of freedom in designing the outer appearance of the barrel 1 is further increased, and it is possible to produce a tube container with a higher design, not limited to the gusset type. Note that the ruled lines 20 are formed by half-cutting only the paper layer 32 of the sheet 41 from the outer layer side (upper side of the paper surface of FIG. 3) to form a weakened portion, and the ruled lines 20 are formed. It can be a method.

Next, both ends of the sheet 41 provided with the ruled lines 20 are attached together to form the body portion 1 . The body 1 after bonding may be folded along specific ruled lines 20 as shown in FIG. 5(a), or may be cylindrical as shown in FIG. 5(b). Regardless of the shape, tube containers having the same shape can be produced as long as the relative positional relationship of the ruled lines 20 is the same. 5(a) and 5(b), the ruled line 20 is provided along the length of the body 1, but there is a risk that the welding between the flange 4 and the sealant layer 35 of the body 1 may be inhibited. Therefore, it is preferable that these welded portions are not provided.

Next, the formed barrel portion 1 is attached to a mandrel, the inner surface (sealant layer 35) of the barrel portion 1 and the outer surface 8 of the flange portion 4 are welded, and the spout portion 2 is attached to the barrel portion 1 (Fig. 6(a). )). After that, the body 1 is filled with contents.

Next, the body portion 1 is folded along the ruled lines 20 to form a first fold 21 and a second fold 22 . When the body 1 shown in FIG. 6(a) is bent along the ruled line 20, the cross-sectional shape of the body 1 becomes as shown in FIG. 6(b). However, for the sake of convenience, FIG. 6(b) shows a shape that does not consider that the contents are filled, so the cross-sectional view of the trunk 1 after actually making the creases is shown in FIG. 6 ( It bulges outward more than b), and the closer the cross section is to the flange portion 4, the closer to a circular shape it becomes.

Next, the end portion 5a of the body portion 1 is closed with a gusset seal to complete the tube container 100 filled with the contents as shown in FIG.

Thus, when the gusset is formed on the end portion 5a side of the tube container 100, the length L1 of the tube container 100 is equal to that of the tube container 200 molded into a general shape as shown in FIG. It can be shorter than the length L2 of the trunk. In addition, as shown in FIG. 9, the length L3 of the tube container 100 after use becomes equal to the length L2 of the general tube container 200. As shown in FIG.

Further, the width W1 of the end portion 5a of the body portion 1 of the tube container 100 is smaller than the width W2 of the end portion of a general tube container 200. As shown in FIG. Therefore, it is possible to suppress the contents from escaping to the end side when squeezing out, and compared to the general tube container 200, the tube container 100 is easy to squeeze out even when the remaining amount of the contents is low. . Further, as shown in FIG. 9, even when the remaining amount of the contents is extremely small, the first crease 21 constituting the gusset is folded inside the trunk portion 1, so that the entire trunk portion 1 can be Since the effective width is smaller than the state shown in FIG. 7 in which the remaining amount of the contents is sufficient, squeezing out is easy.

The method of manufacturing the gusset-type tube container 100 has been described above, but in general, a gusset bag-making machine is required for gusset bag-making. When a gusset bag-making machine is used, only the crease of the valley fold can be provided in the process of welding the sheet 41 with both ends bonded together and the spout portion 2 . For this reason, normally, only a body having a general gusset-shaped cross section as shown in FIG. 6(b) can be formed. However, in this embodiment, since the ruled lines 20 are provided at the stage of the sheet 41, it is possible to form a trunk portion that is not valley-folded as shown in FIGS. 10(a) and 10(b). Furthermore, as shown in FIG. 10(c), a trunk portion having a rectangular cross section with rounded corners can also be formed. In this case, a plurality of ruled lines 20 are provided at each corner portion, and mountain-fold folds (third folds) are provided along each of the plurality of ruled lines 20 . At this time, the number of creases 20 and third creases provided at each corner is not particularly limited, but may be three per corner, for example.

In the above-described method for manufacturing the tube container 100, the method of adding the ruled lines 20 to the sheet 41 before bonding both ends of the sheet 41 is described. In the step of welding, the body portion 1 may be formed by providing ruled lines 20 by sandwiching the mandrel and the outside.

As described above, in the present embodiment, a plurality of ruled lines 20 are provided on the body portion 1 of the tube container 100, and by changing the location where the ruled lines 20 are provided and the length of the ruled lines 20, the tube container can be The appearance of the tube container 100 can be freely designed, and the tube container 100 excellent in design can be provided.

In addition, by sealing the end 5a of the body 1 with a gusset seal, the size of the body in the length direction can be suppressed more than a tube container having a general shape, and squeezing can be facilitated.

Further, since the ruled lines 20 are formed in the state of the sheet 41, a gusset bag-making machine is not required even when the body portion 1 is formed into a gusset shape, and equipment costs and manufacturing costs can be reduced. In addition, compared to the case of forming with a gusset bag making machine, the variation in creases when the gusset is folded can be suppressed, so that defective welding of the spout portion is less likely to occur, and the difficulty of manufacturing is reduced. Furthermore, the trunk portion 1 can be produced without valley folds.

INDUSTRIAL APPLICABILITY The tube container according to the present invention can be used as a packaging material for pharmaceuticals, cosmetics, foods, and the like.

1 trunk portion 2 spout portion 3 spout tube portion 4 flange portions 5a, 5b end portion 20 ruled line 21 first crease 22 second crease 32 paper layer 35 sealant layer 41 sheet

Claims (4)

a pouring port portion having a cylindrical pouring tube portion and a flange portion extending outward from one end of the pouring tube portion;
A tube-shaped body made of a sheet containing a paper layer and an innermost sealant layer, one end of which is closed and a predetermined range from the other end of which is sealed to the flange,
A tube container, wherein the body is provided with a plurality of ruled lines extending in the length direction of the body. A first crease folded into a valley fold along a first crease extending in the longitudinal direction of the trunk, and a first crease that is parallel to the first crease and line symmetrical about the first crease. A pair of second creases that are mountain-folded along a pair of second creases are provided on a part of the trunk and on the other part facing thereto,
2. The tube container according to claim 1, wherein one end of said body is closed with a gusset seal. 3. The tube container according to claim 2, wherein said first fold line and said second fold line are provided within a predetermined range from said one end of said body portion. 2. The tube container according to claim 1, wherein the body is provided with a plurality of third creases that are folded in a mountain fold along each of the plurality of ruled lines.

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