JP2023042820A - Tube-shaped container - Google Patents

Abstract

To provide a tube-shaped container in which a body is hard to buckle when standing upside down even a thickness of the body is thin and the body is easily opened when filled with contents.SOLUTION: A tube-shaped container comprises a spout portion and the body. The body is formed of a laminated sheet containing a paper layer, is closed by a bottom seal portion located at one end of the body and the other end of the body is sealed with the spout portion, and at least three straight or curved creases are provided from an end edge of a spout portion side of the bottom seal portion or its vicinity to an end edge of a bottom seal portion side of the spout portion or its vicinity.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a tubular container having a spout and a body.

2. Description of the Related Art Tube-shaped containers that can be filled and packaged with pharmaceuticals, cosmetics, foods, and the like are known. For example, Patent Literature 1 discloses a laminated tube container having a cylindrical body mainly made of resin and a spout portion composed of a shoulder portion and a spout connected to the upper end of the body. It is shown.

JP 2014-231372 A

The tube-shaped container shown in Patent Document 1 has the viewpoint of preventing the body from bending when it is inverted and the ease of opening the body when the contents are filled, which are required for display and use at stores. From the point of view of this, structurally sufficient consideration has not been made.

FIG. 3(a) is a front perspective view of an example 200 of conventional tube-shaped containers, including the tube-shaped container described in Patent Document 1, before being filled with contents. FIG. 3(b) is an enlarged sectional view taken along line BB of FIG. 3(a). FIG. 3(c) is a front perspective view showing an example 200 of conventional tube-shaped containers, including the tube-shaped container described in Patent Document 1, in a bent state after being filled with contents.

For example, if a relatively thin trunk material is used, the trunk 201 may bend (bend) when standing upside down, as shown in FIG. In this case, when the cap is turned upside down with the cap attached to the spout portion 202 at the time of display at the store, there is a risk that the appearance will be poor and the product value will be reduced. In addition, when a large amount of contents enters near the one end on the side opposite to spout portion 202 in a state in which the contents are reduced during use, the contents are clogged at the bent portion of body portion 201, and the contents do not flow. becomes difficult to remove. In order to prevent the body part 201 from being bent, a method of increasing the thickness of the laminated sheet of the body part 201 is conceivable, but in that case, there is a problem that it becomes difficult to squeeze out the contents.

Further, when the body portion 201 is manufactured by, for example, a bag making machine, it becomes a cylindrical shape with left and right folds, and as shown in FIG. When viewed from above, it is almost straight or has a thin flat shape like a willow leaf. Since there is no gap as a filling port during filling, it is difficult to insert the filling nozzle into the body portion 201 as it is. Further, when filling the content, for example, when the center portion of the body portion 201 in the left-right direction is opened with the spout portion 202 being sealed, the sealed spout portion 202 is opened. Since air does not enter from the other end of the body, which is the side, and air does not easily enter from one end of the body 201, the body 201 is difficult to open.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a tube-shaped container that is less likely to bend when turned upside down even if the thickness of the body is reduced, and that is easy to open when filled with contents.

The invention according to claim 1 has a spout portion and a body portion, the body portion is formed of a laminated sheet containing a paper layer, and is closed by a bottom seal portion located at one end of the body portion, The other end of the body portion is sealed to the spout portion, and extends from the edge of the bottom seal portion on the spout portion side or its vicinity to the edge of the spout portion on the bottom seal portion side or its vicinity. A tube-shaped container characterized by having at least three straight or curved creases.

The invention according to claim 2 is the tube-shaped container according to claim 1, wherein the basis weight of the paper layer is 30 g/m ² or more and 300 g/m ² or less.

The invention according to claim 3 is the tube-shaped container according to claim 1, wherein the basis weight of the paper layer is 50 g/m ² or more and 150 g/m ² or less.

The invention according to claim 4 is the tubular container according to any one of claims 1 to 3, wherein the paper layer is composed of a single layer.

In the invention according to claim 5, the pouring port part has a tubular pouring tube part and a flange part connected to one end of the pouring tube part and extending outward from the pouring tube part. and the other end of the body portion is sealed to the flange portion, and the shape of the outer peripheral edge of the flange portion in a plan view matches the cross-sectional shape of the body portion. 5. A tubular container according to any one of 1 to 4.

In the sixth aspect of the present invention, the pouring port portion has a tubular pouring tube portion and a flange portion connected to one end of the pouring tube portion and extending outward from the pouring tube portion. and the other end of the body portion is sealed to the flange portion, and the other end of the body portion is attached to the surface of the flange portion opposite to the one end side of the body portion. The tubular container according to any one of claims 1 to 5, characterized by:

The invention according to claim 7 is the tube-shaped container according to claim 6, wherein the flange portion has a flat plate shape perpendicular to the height direction of the body portion.

In the tube-shaped container of the present invention, from the edge of the bottom seal portion located at one end on the spout portion side or its vicinity to the edge of the spout portion on the bottom seal portion side or its vicinity. , at least three straight or curved creases. Since the body portion is formed of a laminated sheet including a paper layer, the crease is easily formed and the crease can be maintained more than the body portion formed of a laminated sheet composed only of a resin layer. can.
By providing the body with a linear crease extending in the height direction as described above, the rib effect of the folded part due to the crease allows the body to be displayed at stores even if the thickness of the body is reduced. In the scene of use, it is possible to make it difficult to bend the waist when standing upside down.
Furthermore, since the trunk portion is provided with the linear creases extending in the height direction as described above, it is easy to open when filling the contents. For example, when the body is manufactured by a bag-making machine, it becomes a cylinder with left and right folds. Easy to insert the nozzle. Also, when filling the contents, for example, even if the middle part in the left-right direction of the body is opened by vacuuming from both sides with the spout part sealed, air is likely to enter from one end of the body. Therefore, the body can be easily opened.

(a) It is a front perspective view before content filling of the tube-shaped container which concerns on 1st Embodiment. (b) is a rear perspective view of the tube-shaped container according to the first embodiment before being filled with contents. (c) It is a front perspective view after the content filling of the tube-shaped container which concerns on 1st Embodiment. FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 1(a); (a) It is a front perspective view of an example of a conventional tube-shaped container before being filled with contents. (b) is an enlarged cross-sectional view taken along line BB of FIG. 3(a); (c) It is a front perspective view showing an example of a conventional tube-shaped container in a bent state after being filled with contents. (a) It is a front perspective view before content filling of the tube-shaped container which concerns on 2nd Embodiment. (b) It is a rear perspective view of the tube-shaped container according to the second embodiment before being filled with contents. (c) It is a front perspective view after the content filling of the tube-shaped container which concerns on 2nd Embodiment. 4(a) is an enlarged cross-sectional view taken along the line CC of FIG. 4(a); FIG. (a) It is a front perspective view before content filling of the first example of the tube-shaped container which concerns on 3rd Embodiment. 6(b) is an enlarged cross-sectional view taken along line DD of FIG. 6(a). (a) is a front perspective view of a second example of a tube-shaped container according to a third embodiment before being filled with contents; (b) is an enlarged cross-sectional view along line EE of FIG. 7(a); (a) It is a front perspective view before content filling of the third example of the tube-shaped container which concerns on 3rd Embodiment. (b) is an enlarged cross-sectional view taken along line FF of FIG. 8(a); (a) It is a front enlarged view near the spout part of the tube-shaped container which concerns on 1st Embodiment to 3rd Embodiment. (b) It is a side enlarged view of the vicinity of the spout portion of the tube-shaped container according to the first to third embodiments. 9B is an enlarged cross-sectional view taken along line GG of FIG. 9B; FIG. FIG. 3 is a cross-sectional view showing an example of the layer structure of a laminated sheet forming the body of the tube-shaped container according to the first to third embodiments;

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

<Tube-shaped container according to the first embodiment>
FIG. 1(a) is a front perspective view of the tubular container 100 according to the first embodiment before being filled with contents. FIG. 1(b) is a rear perspective view of the tubular container 100 according to the first embodiment before being filled with contents. FIG. 1(c) is a front perspective view of the tubular container 100 according to the first embodiment after being filled with contents. FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1(a). FIG. 9(a) is an enlarged front view of the vicinity of the spout portion 1 after the tubular container 100 according to the first embodiment is filled with contents. FIG. 9(b) is an enlarged side view of the vicinity of the spout portion 1 after filling the contents of the tubular container 100 according to the first embodiment. FIG. 10 is an enlarged sectional view taken along line GG of FIG. 9(b). FIG. 11 is a cross-sectional view showing an example of the layer structure of the laminated sheet 50 forming the body portion 31 of the tubular container 100 according to the first embodiment.

As shown in FIG. 1 , a tube-shaped container 100 according to this embodiment has a spout portion 1 and a body portion 31 . As shown in FIG. 1(c), the body portion 31 is closed by a bottom seal portion 36 located at one end thereof, and contains contents (not shown). The other end of the body portion 31 is sealed to the spout portion 1 . The spout part 1 has a tubular pouring tube part 16 and a flange part 11 connected to one end of the pouring tube part 16 and extending outward from the pouring tube part 16 . The other end of is sealed to the flange portion 11 of the spout portion 1 .

The trunk portion 31 extends from the edge of the bottom seal portion 36 on the spout portion 1 side or the vicinity thereof to the bottom seal portion 36 side of the spout portion 1 (for example, the side opposite to the spout portion 16 side of the flange portion 11). Three linear creases 6 are provided up to the edge of or in the vicinity thereof.

As will be described later, since the trunk portion 31 is formed of the laminated sheet 50 including the paper layer 51 (see FIG. 11), the trunk portion 31 is folded compared to the trunk portion 31 formed of the laminated sheet 50 composed only of the resin layer. The crease 6 is easily formed, and the crease 6 can be more maintained.

By providing the body portion 31 with the linear creases 6 extending in the height direction as described above, the rib effect of the portion folded by the creases 6 allows the thickness of the body portion 31 to be reduced. It is possible to prevent the body part 31 from bending at the time of upside down when displayed or used in a shop. For example, when the cap is put on the spout part 1 and turned upside down in a display at a store, the body part 31 is bent and does not turn upside down, so that the appearance does not deteriorate. Also, during use, especially when a large amount of contents enters near the one end on the side opposite to the spout part 1 in a state where the contents are reduced, the contents are not clogged at the bent portion of the body part 31. Therefore, it becomes easy to take out the contents. After the content has decreased, the air can easily move to the vicinity of the one end of the body portion 31 when taking out the content, so that the content can be easily taken out and the remaining content can be suppressed. Here, the “height direction” means the direction of the central axis PP of the tubular container 100 in FIG.

Further, since the trunk portion 31 is provided with the linear creases 6 extending in the height direction as described above, it is easy to open the container when the contents are filled. When the body portion 31 is manufactured by a bag making machine, for example, it has a cylindrical shape with left and right folds. Since there is a gap, it is easy to insert the filling nozzle as it is. Also, when filling the contents, for example, when the spout portion 1 is sealed and the central portion of the body portion 31 in the left-right direction is vacuumed from both sides to open, the air from one end of the body portion 31 can be removed. is easy to enter, the body portion 31 is easy to open.

As described above, when the body portion 31 is filled with the content, there is a gap as a filling port in the body portion 31, and the filling nozzle can be easily inserted as it is. By aiming at the gap in the center, you can insert the filling nozzle while opening it.

In this embodiment, the body 31 is provided with three folds 6, but if the body 31 does not easily bend when standing upside down and is easy to open when filling the contents, the number of creases 6 should be less than three. May be many. Further, if the trunk portion 31 does not easily bend when standing upside down and easily opens when the contents are filled, the crease 6 may be curved instead of straight. In addition, if the body 31 does not easily bend when standing upside down and can easily be opened when the contents are filled, the three or more creases 6 have at least one linear shape and the rest are straight. It may be curved. Furthermore, if the body 31 is less likely to bend when standing upside down and is more likely to open when filling with contents, at least one crease 6 may be a linear crease 6 or a curved crease 6 . may be formed in a row.

The body portion 31 provided with the crease 6 is formed of a laminated sheet 50 including a paper layer 51 . The laminated sheet 50 has a pair of substantially parallel edges. In the present embodiment, the linear creases 6 can be provided by forming the ruled lines 7 on the trunk portion 31 . An example of a method for forming the body portion 31 of the tube-shaped container 100 according to this embodiment will now be described.

The body portion 31 can be produced using a bag making machine, a pillow/stick packaging machine, or the like. For example, the trunk portion 31 is sequentially processed while the laminated sheet 50 is conveyed by the conveying device. Before the laminated sheet 50 having a pair of substantially parallel edges is formed into a tubular shape, three linear ruled lines 7 are provided at regular intervals in the height direction of the trunk portion 31 . The ruled lines 7 are formed by pressing the laminated sheet 50 with a heating plate or the like while the laminate sheet 50 is folded from the inner surface side (contents side) toward the outer surface side (opposite side to the contents). After that, while forming the laminated sheet 50 having the ruled lines 7 in a cylindrical shape, the band-shaped portions including the pair of edges of the laminated sheet 50 are overlapped.

Next, using a guide with an inverted T-shaped cross section, the band-shaped portions including the pair of edges are raised, and the inner surfaces of the members are opposed to each other with the guide interposed therebetween. Next, using a flat guide, the inner surfaces of the laminated sheets 50 are folded about 90 degrees to overlap the three laminated sheets 50 . In this state, by sealing using a seal bar, the inner surfaces of the laminated sheet 50 are welded together to form the back-pasted seal portion, and at the same time, the back-pasted seal portion is formed on the body portion 31 by the heat-fusible coat layer 58 described later. A body 31 can be formed which is welded to the outer surface of the.

Note that the left and right ruled lines 7 of the three lines are formed so as to become the left and right edges in a front view when the cylinder is formed, and the central ruled line 7 of the three lines is formed into the cylinder shape. It may be formed so as to be the center in the left-right direction when viewed from the front.

In addition, by forming the three linear ruled lines 7 at equal intervals in the circumferential direction of the body portion 31, bending of the body when standing upside down is further suppressed, and the appearance is also good.

As another method of forming three straight ruled lines 7 on the trunk portion 31, one straight ruled line is formed in the height direction of the trunk portion 31 with a heating plate or the like before forming the laminated sheet 50 into a tubular shape. 7 is applied, and when forming a cylinder, it is bent so as to avoid the above-mentioned one ruled line 7 to form a cylinder with left and right folds, and the left and right edges of the cylindrical body 31 are heated. Two more ruled lines 7 may be added by pressing such as.

The position and forming method of the ruled lines 7 on the body portion 31 are not limited to those described above as long as the body portion 31 is less likely to bend when standing upside down and can be easily opened when the contents are filled.

The method of adhering the laminated sheets 50 to each other in the bottom seal portion 36 is not particularly limited. can be used.

Next, referring to FIGS. 9 and 10 showing the tube-shaped container 100 after being filled with contents, the structure of the tube-shaped container 100 near the spout 1 will be described. In FIG. 9, the crease 6 is omitted.

As described above, the spout portion 1 has a tubular pouring tube portion 16 and a flange portion 11 connected to one end of the pouring tube portion 16 and extending outward from the pouring tube portion 16 . The spout portion 1 also includes a plate-like closing portion 21 that is connected to one end of the pouring tube portion 16 and perpendicular to the height direction of the body portion 31 . Since a portion of the closing portion 21 becomes the flange portion 11, the flange portion 11 is also in the shape of a flat plate perpendicular to the height direction of the trunk portion 31. As shown in FIG.

Since the flange portion 11 has a flat plate shape, unlike the conventional flange portion 203 (see FIG. 3(a)) formed in a tapered shape, a space is provided on the inner side to allow the contents to remain. don't have For this reason, by bending the body portion 31 at the edge of the flange portion 11 with fingers or the like, the contents slightly remaining in the body portion 31 can be separated by the flat surface on the inner side of the flange portion 11 and the inner surface of the body portion 31. By pinching, it can be pushed out toward the periphery of the opening of the spout portion 1 . Moreover, the contents pushed out toward the periphery of the opening of the spout portion 1 can be squeezed out from the opening without remaining inside the body portion 31 and the spout portion 1 . As a result, it is possible to suppress the contents from remaining inside the container.

In addition, as described above, by squeezing out the contents while bending the body portion 31, it is possible to suppress the remaining of the contents. For this reason, it is preferable to form the trunk portion 31 from the laminated sheet 50 having low rigidity (not strong stiffness) that allows the trunk portion 31 to be easily bent.

By setting the thickness of the laminated sheet 50 constituting the body portion 31 of the tube-shaped container 100 to 30 μm or more and 300 μm or less, which is thinner than the body portion 31 of a general tube-shaped container 100, the contents can be easily squeezed out with a light force. , the residue of the contents can be suppressed.

The cross-sectional shape of the trunk|drum 31 of the trunk|drum 31 becomes a fan shape or a substantially polygonal shape by being filled with the content after the crease 6 was provided. It is preferable that the shape of the outer peripheral edge of the flange portion 11 in a plan view is also a fan-shaped substantially polygonal shape so as to match the cross-sectional shape of the body portion 31 . In other words, it is preferable that the shape of the outer peripheral edge of the flange portion 11 in plan view matches the cross-sectional shape of the trunk portion 31 . Here, “plan view of the flange portion” means a plan view of the flange portion 11 when the spout portion 1 of the tube-shaped container 100 is oriented upward. Further, the “cross-sectional shape” means a cross-sectional shape perpendicular to the central axis PP of the tube-shaped container 100 .

By matching the shape of the outer peripheral edge of the flange portion 11 in plan view with the cross-sectional shape of the body portion 31 (in the present embodiment, the shape of the outer peripheral edge of the flange portion 11 in plan view is fan-shaped or substantially polygonal). By doing so, the folding habit 6 of the trunk portion 31 can be better maintained, and the bending of the trunk portion 31 when standing upside down can be further suppressed.

The material of the spout portion 1 is not particularly limited, but a resin material such as low-density polyethylene can be suitably used. In addition, by using a material having a barrier function for the spout portion 1 as well as the body portion 31, the barrier function of the tube-shaped container 100 as a whole is improved, and the quality of the contents can be better protected. The spout portion 1 in which the closing portion 21 is formed in a flat plate shape can use less material than the spout portion 202 (see FIG. 3) according to the prior art formed in a tapered shape.

As an example, the closing part 21 has an annular half-cut 17 at its approximate center, and a pull ring 18 inside the half-cut 17 . Since the closing part 21 includes the half cut 17 and the pull ring 18 , the user of the tube-shaped container 100 pulls the pull ring 18 to remove a part of the flange part 11 along the half cut 17 , thereby removing the closing part 21 . An opening may be formed in 21 for removing the contents. It should be noted that an opening for taking out the contents may be formed in advance in the closing portion 21 without providing the half cut 17 and the pull ring 18 .

The method of adhering the trunk portion 31 and the spout portion 1 is not particularly limited. , a method of heat-sealing them can be used.

An overlapping portion (not shown) is formed on the flange portion 11 by, for example, folding the ends of the trunk portions 31 that are abutted together with the inner surfaces of the trunk portions 31 affixed together. In the overlapped portion, the outer surfaces of the laminated sheets 50 are in contact with each other, and the outer surfaces of the laminated sheets 50 that are in contact with each other are sealed with a material having heat-sealability.

The tube-shaped container 100 may be provided with a cap (not shown) that can be attached to and detached from the ejection tube portion 16 of the ejection port portion 1 . Examples of the detachable cap include a hinge cap attached to the spout 1 and a screw cap detachable by screwing. When the tube-shaped container 100 has a detachable cap, it becomes easy to reseal the tube-shaped container 100 after opening.

The cap is, for example, a hinge cap attached to the spout portion 1 . When a hinge cap is provided as a cap, compared to the case of providing a cap that is screwed with the flange portion 11 and rotated to open, the torsional rigidity required for the trunk portion 31 that is grasped by hand when opening is reduced. Therefore, the laminated sheet 50 having low rigidity can be easily adopted, which is preferable.

The transverse cross-sectional shape of the hinge cap is adapted to, for example, the trunk portion 31 provided with the crease 6, or the flange portion 11 whose outer peripheral edge shape in plan view matches the transverse cross-sectional shape of the trunk portion 31. is preferably formed.
In this embodiment, the transverse cross-sectional shape of the hinge cap is the body portion 31 provided with the crease 6, or the shape of the outer peripheral edge formed in accordance with the body portion 31 in plan view is fan-shaped or substantially polygonal. It is preferable that the shape of the outer peripheral edge in a plan view is a fan shape or a substantially polygonal shape so as to match the flange portion 11 of the.

In addition, since the top surface of the cap can also serve as the bottom surface of the tube-shaped container 100 when the tube-shaped container 100 is turned upside down during store display or storage, the top surface of the cap can be used when the tube-shaped container 100 is turned upside down. It is preferable to have a sufficient area to maintain an inverted state without falling over. Even if the thickness of the body portion 31 is reduced, the body portion 31 formed with the linear creases 6 and the top surface portion are sufficient to exhibit the effect of making the body portion 31 less likely to bend when standing upside down. With the cap having such a large area, when the tube-shaped container 100 is turned upside down when it is displayed in a shop or stored, it is possible to maintain the upside down state.

FIG. 11 is a cross-sectional view showing an example of the layer structure of the laminated sheet 50 forming the body portion 31 of the tubular container 100 according to this embodiment.

The trunk portion 31 is formed of a laminated sheet 50 including a paper layer 51 .

For example, the laminated sheet 50 is obtained by laminating a base film layer 52, a barrier layer 53 and a sealant layer 54 on one side of the paper layer 51 in this order, and laminating a paper protective layer 55 on the other side of the paper layer 51, It is a multi-layer sheet in which an ink layer 56 and an overcoat varnish layer 57 are laminated on a paper protective layer 55, and a heat-fusible coating layer 58 is pattern-coated. The details of each layer will be described below.

(paper layer)
Owing to the paper layer 51, the body portion 31 is easily formed with the crease 6, and the shape retainability can be maintained, so that the crease 6 can be maintained. In addition to the paper layer 51, a material having a dead hole property such as polyethylene terephthalate is relatively easy to form the crease 6, but it is difficult to retain the crease 6. The paper layer 51 is also a structural layer that imparts strength and stiffness to the tubular container 100 .

The basis weight of the paper used for the paper layer 51 is preferably 30 g/m ² or more and 300 g/m ² or less. 30 g/m ² is normal thin paper and 300 g/m ² is paper used in packaging. When the basis weight of the paper is more than 300 g/m ² , many of the papers have short fiber lengths, and cracks are likely to occur when the paper is folded. Also, if the basis weight of the paper is more than 300 g/m ² , the overlapped portion formed when the body portion 31 is folded over the flange portion 11 has a large step, making sealing difficult. In order to make the trunk portion 31 more likely to have the crease 6 and to maintain the crease 6, the basis weight of the paper used for the paper layer 51 is more preferably 50 g/m ² or more and 150 g/m ² or less. .

The type of paper forming the paper layer 51 is not particularly limited, but in order to prevent the layers forming the paper layer 51 from coming apart at the end face of the laminated sheet 50, it is preferably composed of a single layer. Examples include kraft paper. From the viewpoint of strength, bending resistance, and printability, it is preferable to use single-glazed kraft paper or double-glazed kraft paper. As the paper forming the paper layer 51, waterproof paper or greaseproof paper may be used as necessary. In addition, in order to reduce the resin ratio of the laminated sheet 50 constituting the body portion 31 in consideration of the environment, the paper layer 51 is preferably made of paper containing 50% or more of cellulose fiber.

(Base film layer)
The base film layer 52 is a layer that imparts heat resistance and physical strength to the laminate sheet 50 . The base film layer 52 is also a layer that serves as a base material for the barrier layer 53 . The material of the film constituting the base film layer 52 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. However, the base film layer 52 may be made of paper.

(barrier layer)
The barrier layer 53 is a functional layer that blocks oxygen, water vapor, and the like to improve the storage stability of the contents. The barrier layer 53 is, for example, a vapor-deposited film of an inorganic compound such as nylon, silica or alumina, a vapor-deposited film of a metal such as aluminum, a metal foil such as aluminum, a plate-like mineral and/or a coating film of a barrier coating agent containing a barrier resin. It can be composed of one or more of 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 53 may be laminated in advance on the base film layer 52 to form a barrier film, or may be provided as a single layer film.

(sealant layer)
Although the material of the sealant layer 54 is not particularly limited, thermoplastic resins such as polypropylene, polyethylene, cyclic polyolefin, and polyester are preferable. A resin having a softening temperature lower than that of the base film layer 52 by 20° C. or more is used for the sealant layer 54 . If the softening temperature of the sealant layer 54 is not lower than the softening temperature of the base film layer 52 by 20° C. or more, the possibility of the base film layer 52 softening and pinholes occurring during sealing is increased, which is not preferable. The softening temperature of the sealant layer 54 is preferably 40° C. or more lower than the softening temperature of the base film layer 52 .

The thermoplastic resin used for the sealant layer 54 may be any material as long as it has adhesiveness to the thermoplastic resin constituting the material of the spout portion 1, but it is the same material as the thermoplastic resin used for the spout portion 1. is preferred. By using the same thermoplastic resin layer for the sealant layer 54 and the thermoplastic resin layer for the spout portion 1, the sealing strength between the body portion 31 and the spout portion 1 can be improved.

(Paper protective layer)
The paper protective layer 55 is a layer for protecting the paper layer 51 constituting the laminated sheet 50 from adhesion of contents and stains. The material and formation method of the paper protective layer 55 are not particularly limited, but the paper protective layer 55 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 55 is preferably 0.2 μm to 50 μm, more preferably 1 μm to 20 μm. When the thickness of the paper protective layer 55 is less than 0.2 μm, pinholes may occur in the paper protective layer 55, and the protection of the paper layer 51 may become insufficient. Moreover, if the thickness of the paper protective layer 55 exceeds 50 μm, it is not preferable in terms of the amount of resin used and the manufacturing cost.

(ink layer, overcoat varnish layer)
The ink layer 56 is a layer applied by printing for various displays, and the overcoat varnish layer 57 is a layer for imparting abrasion resistance and the like. The stacking order of the ink layer 56 and the overcoat varnish layer 57 may be reversed from that in FIG. Moreover, the overcoat varnish layer 57 may also serve as the paper protective layer 55 .

(Heat-welding coat layer)
The heat-fusible coating layer 58 is a layer for imparting heat-fusibility to the outer surface of the laminated sheet 50 . For example, the outer surface of the back seal portion is sealed to the outer surface of the body portion 31 by a heat-welding coating layer 58 pattern-coated (partially coated) on the outer surface of the laminated sheet 50, and the flange portion 11 of the spout portion 1 is sealed. The outer surfaces of the laminated sheets 50 that are in contact with each other at the upper overlapping portion are sealed.

The heat-fusible coating layer 58 can be formed by applying a coating agent containing a thermoplastic resin having a melting point of 200° C. or less such as acrylic polymer, polyolefin, polyvinyl acetate, polyester, etc., and drying it. In addition to the thermoplastic resin, the coating agent may contain an inorganic substance or the like for preventing blocking.

The coating amount of the coating agent for forming the heat-fusible coating layer 58 is 0.2 g/m ² to 40 g/m ² , preferably 3.0 g/m ² to 30 g/m ² . If the coating amount of the coating agent is less than 0.2 g/m ² , the adhesion strength between the outer surfaces of the laminated sheet 50 is insufficient, and a phenomenon occurs in which the laminated sheet 50 jumps up at the back seal portion and the overlapping portion on the flange portion 11 . do. On the other hand, when the coating amount of the coating agent exceeds 40 g/m ² , the coefficient of friction increases, and the mechanical suitability for processing equipment such as a bag-making machine decreases, and blocking between the laminated sheets 50 tends to occur. .

The thermally adhesive coating layer 58 may be provided on the entire surface of the laminate sheet 50, but since the coefficient of friction on the surface of the laminate sheet 50 is increased, the mechanical suitability in the process of processing the body portion 31 and the subsequent process is reduced. may decrease. Therefore, it is more preferable from the standpoint of mechanical suitability that the heat-fusible coating layer 58 is provided on a part of the surface of the laminated sheet 50 by pattern-coating a coating agent.

When the heat-adhesive coating layer 58 is provided on part of the surface of the laminated sheet 50, the portion to be sealed, that is, the portion where the outer surface of the back seal portion and the outer surface of the body portion 31 contact, and the overlap on the flange portion 11 It is sufficient that the heat-fusible coating layer 58 is provided on the portions where the outer surfaces of the laminated sheets 50 contact each other. However, the heat-adhesive coating layer 58 may be provided only on one of the contact surfaces at the sealing target location.

In order to reduce the resin ratio of the laminated sheet 50 forming the body portion 31, it is preferable that the paper layer 51 accounts for 50% or more of the weight of the laminated sheet 50. FIG. From the viewpoint of reducing the amount of resin used, the higher the proportion of paper, the better.

In the layer structure of the laminated sheet 50 shown in FIG. 3, one or more of the base film layer 52, the barrier layer 53, the paper protection layer 55, the ink layer 56 and the overcoat varnish layer 57 may be omitted.

Specific examples of the layer structure of the laminated sheet 50 include the following. The following layer configurations are described from the outermost layer side.

Paper (70 g/m ² )/Transparent metallized polyethylene terephthalate (PET) (12 μm)/Nylon (NY) (15 μm)/Polyethylene (PE) (50 μm)
Paper (120 g/m ² )/Transparent metallized polyethylene terephthalate (PET) (12 μm)/Nylon (NY) (15 μm)/Polyethylene (PE) (50 μm)
Paper (150 g/m ² )/Polyethylene (PE) (50 μm)/Ethylene-vinyl alcohol copolymer (EVOH) (30 μm)/Polyethylene (PE) (50 μm)
Polyethylene (PE) (30 μm)/paper (150 g/m ² )/polyethylene (PE) (50 μm)/ethylene-vinyl alcohol copolymer (EVOH) (30 μm)/polyethylene (PE) (50 μm)
Polyethylene (PE) (30 μm)/Paper (200 g/m ² )/Polyethylene (PE) (
50 μm)

<Tube-shaped container according to the second embodiment>
FIG. 4(a) is a front perspective view of the tubular container 101 according to the second embodiment before being filled with contents. FIG. 4(b) is a rear perspective view of the tubular container 101 according to the second embodiment before being filled with contents. FIG. 4(c) is a front perspective view of the tubular container 101 according to the second embodiment after being filled with contents. FIG. 5 is an enlarged sectional view taken along line CC of FIG. 4(a). FIG. 9(a) is an enlarged front view of the vicinity of the pouring port 2 after the tubular container 101 according to the second embodiment is filled with contents. FIG. 9(b) is an enlarged side view of the vicinity of the spout portion 2 after filling the contents of the tubular container 101 according to the second embodiment. FIG. 10 is an enlarged sectional view taken along line GG of FIG. 9(b). FIG. 11 is a cross-sectional view showing an example of the layer structure of the laminated sheet 50 forming the body portion 32 of the tubular container 101 according to the second embodiment.

The difference between the tube-shaped container 101 according to the present embodiment and the tube-shaped container 100 according to the first embodiment is that the number and arrangement of creases, which are the creases 6, provided on the body, and the accompanying planar view of the flange. It is the shape of the outer peripheral edge in In the tube-shaped container 101 according to this embodiment, the description of the same parts as those of the tube-shaped container 100 according to the first embodiment may be omitted. Regarding the tube-shaped container according to the present embodiment, the “tube-shaped container 100 according to the first embodiment” in the description of the tube-shaped container 100 according to the first embodiment is replaced with the “tube-shaped container 100 according to the second embodiment.” "container 101", "spout part 1" to "spout part 2", "flange part 11" to "flange part 12", "closure part 21" to "closure part 22", "body part 31" ' is read as "body portion 32", and "bottom seal portion 36" is read as "bottom seal portion 37".

The trunk portion 32 extends from the edge of the bottom seal portion 37 on the pouring port portion 2 side or its vicinity to the bottom seal portion 37 side of the pouring port portion 2 (the opposite side of the flange portion 12 to the pouring cylinder portion 16 side). Four linear creases 6 are provided up to the edge or its vicinity.

By providing the body portion 32 with the linear creases 6 extending in the height direction as described above, the rib effect of the portion folded by the creases 6 allows the thickness of the body portion 32 to be reduced. It is possible to make the body part 32 less likely to bend at the time of upside down when displayed or used in a shop. For example, when the cap is put on the spout part 2 and turned upside down in the display at the store, the body part 32 is bent and does not turn upside down, so that the appearance does not deteriorate. Also, during use, especially when a large amount of contents enters near the one end on the side opposite to the spout part 2 in a state where the contents are reduced, the contents are not clogged at the bent portion of the body part 32 . Therefore, it becomes easy to take out the contents. After the content has decreased, the air can easily move to the vicinity of the one end of the body portion 32 when taking out the content, so that the content can be easily taken out and the content can be suppressed from remaining. Here, the “height direction” means the direction of the central axis QQ of the tubular container 101 in FIG. 4(a).

The body portion 32 of the tube-shaped container 101 according to the present embodiment is provided with one more crease 6 than the three creases 6 provided on the body portion 32 of the tube-shaped container 100 according to the first embodiment. Therefore, the rib effect due to the crease 6 is increased, and even if the thickness of the body is reduced, the tube according to the first embodiment has the effect of making the body difficult to bend when it is inverted when displayed in a store or used. larger than the shaped container 100 .

Further, since the trunk portion 32 is provided with the linear creases 6 extending in the height direction as described above, it is easy to open when filling the contents. When the body portion 32 is manufactured by a bag-making machine, for example, it has a cylindrical shape with left and right folds. Since there is a gap, it is easy to insert the filling nozzle as it is. Further, for example, when the spout portion 2 is sealed and the central portion of the body portion 32 in the left-right direction is opened by vacuuming from both sides during filling with the contents, air will escape from one end of the body portion 32 . Since it is easy to enter, the body part 32 is easy to open.

As described above, when the body portion 32 is filled with the content, there is a gap as a filling port in the body portion 32, and the filling nozzle can be easily inserted as it is. By aiming at the gap in the center, you can insert the filling nozzle while opening it.

The body portion 32 of the tube-shaped container 101 according to the present embodiment is provided with one more crease 6 than the three creases 6 provided on the body portion 32 of the tube-shaped container 100 according to the first embodiment. As compared with the tube-shaped container 100 according to the first embodiment, there is a larger gap as a filling port at the time of filling, and the filling nozzle can be easily inserted as it is. In addition, when the content is filled in the body portion 32 of the tube-shaped container 101 according to the present embodiment, for example, with the spout portion 2 sealed, the central portion of the body portion 32 in the left-right direction is vacuumed from both sides. Even in the case where the tube-shaped container 100 according to the first embodiment is opened, air is more likely to enter from one end of the body portion 32 than the body portion 31 of the tube-shaped container 100 according to the first embodiment, and the body portion 32 is easier to open.

In this embodiment, the body 32 is provided with four linear creases 6. The crease 6 may be curved instead of straight. In addition, if the body 32 is difficult to bend when standing upside down and is easy to open when the contents are filled, the four or more folds 6 may have at least one linear shape and the rest of the folds may be straight. It may be curved. Furthermore, if the trunk portion 32 does not easily bend when standing upside down and easily opens when the contents are filled, at least one crease 6 may be a linear crease 6 or a curved crease 6 . may be formed in a row.

The body portion 32 provided with the crease 6 is formed of a laminated sheet 50 including a paper layer 51 . The laminated sheet 50 has a pair of substantially parallel edges. In the present embodiment, the line-shaped creases 6 can be provided by forming ruled lines on the trunk portion 32 . An example of a method for forming the body portion 32 of the tubular container 101 according to this embodiment will now be described.

The body 32 can be produced using a bag-making machine, a pillow/stick packaging machine, or the like. For example, the trunk portion 32 is sequentially processed while the laminated sheet 50 is conveyed by the conveying device. Before the laminated sheet 50 having a pair of substantially parallel edges is formed into a tubular shape, four linear ruled lines are drawn at regular intervals in the height direction of the trunk portion 32 . The ruled lines are formed by pressing the laminated sheet 50 with a hot plate or the like while the laminate sheet 50 is folded from the inner surface side (contents side) toward the outer surface side (opposite side to the contents). After that, while forming the laminated sheet 50 having the crease 6 in a cylindrical shape, the band-shaped portions including the pair of edges of the laminated sheet 50 are overlapped.

In the above example, before forming the laminated sheet 50 into a tubular shape, four linear ruled lines are applied at regular intervals in the height direction of the body portion 32, but the laminated sheet 50 is formed into a tubular shape. Before forming, after pressing with a heating plate or the like to form two linear ruled lines at regular intervals in the height direction of the body portion 32, when forming into a cylindrical shape, the two linear ruled lines are applied. Two more ruled lines may be added by pressing the left and right edges of the cylinder-shaped body 32 with a heating plate or the like by folding flat so as to avoid the ruled lines.

Next, using a guide with an inverted T-shaped cross section, the band-shaped portions including the pair of edges are raised, and the inner surfaces of the members are opposed to each other with the guide interposed therebetween. Next, using a flat guide, the inner surfaces of the laminated sheets 50 are folded about 90 degrees to overlap the three laminated sheets 50 . In this state, a seal bar is used to seal the inner surfaces of the laminated sheet 50 to form a back-sticking seal portion, and at the same time, the heat-fusible coating layer 58 serves to seal the back-sticking seal portion to the outer surface of the body portion 32 . A body 32 can be formed that is welded to the .

The 2nd and 4th ruled lines out of the 4 are formed so as to be the left and right edges when viewed from the front when the cylinder is formed, and the 1st and 3rd ruled lines out of the 4 are formed. may be formed so as to be the center in the left-right direction when viewed from the front or rear when formed into a cylindrical shape.

As shown in FIG. 5, by applying ruled lines bent toward the outer surface so as to face each other on the front and back (by making the cross-sectional shape of the trunk 32 bilaterally symmetrical), the front Compared to the case where a ruled line that is bent toward the outer surface side without facing each other is applied to the back surface (when the cross-sectional shape of the body portion 32 is symmetrical), the gap as a filling port during filling Since the space is larger, it becomes easier to insert the filling nozzle as it is.

In addition, by forming the four linear ruled lines in the circumferential direction of the body portion 32 at equal intervals, bending of the body when standing upside down is further suppressed, and the appearance is also good.

As another method of forming four straight lines on the body portion 32, two straight lines are drawn in the height direction of the body portion 32 with a heating plate or the like before the laminated sheet 50 is formed into a tubular shape. When it is formed into a cylindrical shape, it is bent so as to avoid the above two ruled lines to form a cylindrical shape with left and right folds, and the left and right edges of the cylindrical body portion 32 are pressed with a hot plate or the like. By doing so, two more ruled lines may be added.

The positions and formation methods of the ruled lines on the body portion 32 are not limited to those described above as long as the body portion 32 is less likely to bend when standing upside down and can be easily opened when the contents are filled.

In addition, the cross-sectional shape of the trunk portion 32 becomes substantially polygonal by filling the contents after the crease 6 is provided. It is preferable that the shape of the outer peripheral edge of the flange portion 12 in plan view is also substantially polygonal so as to match the cross-sectional shape of the body portion 32 . In other words, it is preferable that the shape of the outer peripheral edge of the flange portion 12 in plan view matches the cross-sectional shape of the trunk portion 32 . Here, the “plan view of the flange portion” means a plan view of the flange portion 12 when the spout portion 2 of the tubular container 101 is oriented upward. Further, the “cross-sectional shape” means a cross-sectional shape perpendicular to the central axis QQ of the tube-shaped container 101 .

<Tube-shaped container according to the third embodiment>
FIG. 6(a) is a front perspective view of the first example 102 of the tubular container according to the third embodiment before being filled with contents. FIG. 6(b) is an enlarged sectional view taken along line DD of FIG. 6(a). FIG. 7(a) is a front perspective view of the second example 103 of the tubular container according to the third embodiment before being filled with contents. FIG. 7(b) is an enlarged sectional view taken along line EE of FIG. 7(a). FIG. 8(a) is a front perspective view of the third example 104 of the tube-shaped container according to the third embodiment before filling with contents. FIG. 8(b) is an enlarged sectional view taken along line FF of FIG. 8(a). FIG. 9(b) is an enlarged side view of the vicinity of the spout portions 3 to 5 of the tubular containers 102 to 104 according to the third embodiment after the content is filled. FIG. 10 is an enlarged sectional view taken along line GG of FIG. 9(b). FIG. 11 is a cross-sectional view showing an example of the layer structure of the laminated sheet 50 forming the body portions 33-35 of the tubular containers 102-104 according to the third embodiment.

The differences between the tube-shaped containers 102-104 according to the present embodiment and the tube-shaped container 100 according to the first embodiment are the body portions 33-35 and the flange portions 13-15. In the tube-shaped containers 102 to 104 according to the present embodiment, description of the same parts as the tube-shaped container 100 according to the first embodiment may be omitted.

Regarding the first example 102 of the tube-shaped container according to the present embodiment, the "tube-shaped container 100 according to the first embodiment" in the description of the tube-shaped container 100 according to the first embodiment is replaced with the "third embodiment." In the first example 102 of the tube-shaped container according to the form, "spout part 1" is replaced with "spout part 3", "flange part 11" is replaced with "flange part 13", and "closure part 21" is replaced with "closure part 23", "trunk portion 31" as "trunk portion 33", and "bottom sealing portion 36" as "bottom sealing portion 38".
Regarding the second example 103 of the tube-shaped container according to the present embodiment, "the tube-shaped container 100 according to the first embodiment" in the description of the tube-shaped container 100 according to the first embodiment is replaced with "the tube-shaped container 100 according to the third embodiment. In the second example 103 of such a tube-shaped container, the "spout part 1" is replaced with the "spout part 4", the "flange part 11" is replaced with the "flange part 14", and the "closure part 21" is replaced with the "closure part 24 , "trunk portion 31" and "bottom seal portion 36" are read as "trunk portion 34" and "bottom seal portion 39", respectively.
Regarding the third example 104 of the tube-shaped container according to the present embodiment, "the tube-shaped container 100 according to the first embodiment" in the description of the tube-shaped container 100 according to the first embodiment is replaced with "the tube-shaped container 100 according to the third embodiment. In the third example 104 of such a tube-shaped container, the "spout part 1" is replaced with the "spout part 5", the "flange part 11" is replaced with the "flange part 15", and the "closure part 21" is replaced with the "closure part 25". In addition, the "body portion 31" is read as the "body portion 35", and the "bottom seal portion 36" is read as the "bottom seal portion 40".

The tubular containers 102 to 104 according to this embodiment differ from the tubular container 100 according to the first embodiment in the method of forming the crease 6 of the body.

In the present embodiment, when the body portions 33 to 35 are formed into a cylindrical shape during bag making, the body portions 33 to 35 are formed with a cylindrical mandrel having a substantially polygonal cross-sectional shape to form a bottom seal. From or near the edges of the portions 38 to 40 (not shown) on the side of the pouring ports 3 to 5 to the edges of the flanges 13 to 15 opposite to the pouring tube portion 16 side or near them, A linear crease 6 is provided. Here, the “cross-sectional shape” refers to the central axis RR of the tubular container 102 in FIG. 6(a), the central axis SS of the tubular container 103 in FIG. It means a cross-sectional shape perpendicular to the central axis TT of the tube-shaped container 104 of a).

The trunk portions 33 to 35 according to this embodiment are formed of a laminated sheet 50 including a paper layer 51. As shown in FIG. The laminated sheet 50 has a pair of substantially parallel edges. An example of a method for forming the body portions 33 to 35 of the tubular containers 102 to 104 according to this embodiment will now be described.

The body portions 33 to 35 can be produced using a bag-making machine, a pillow/stick packaging machine, or the like. For example, the body portions 33 to 35 are sequentially processed while the laminated sheet 50 is conveyed by the conveying device. A laminated sheet 50 having a pair of substantially parallel edges is formed into a tubular shape, and belt-shaped portions including the pair of edges of the laminated sheet 50 are overlapped with each other.

Next, using a guide with an inverted T-shaped cross section, the band-shaped portions including the pair of edges are raised, and the inner surfaces of the members are opposed to each other with the guide interposed therebetween. Next, using a flat guide, the inner surfaces of the laminated sheets 50 are folded about 90 degrees to overlap the three laminated sheets 50 . In this state, by sealing using a seal bar, the inner surfaces of the laminated sheet 50 are welded together to form the back-pasted seal portion, and at the same time, the heat-fusible coating layer 58 is used to seal the back-pasted seal portion to the body portions 33 to 35 . to form a laminated sheet 50 in a tubular shape.

The tubular laminated sheet 50 is inserted into a cylindrical mandrel having a substantially polygonal cross-sectional shape, and the laminated sheet 50 is molded by heat, pressure, etc., so that the cross-sectional shape is substantially multiplied. The linear creases 6 can be provided by forming the square body portions 33 to 35 and forming the linear creases 6 at the corners of the substantially polygonal shape.

For example, when the cross-sectional shape of the cylindrical mandrel is rhombic, the cross-sectional shape of the body 33 is also rhombic (see FIG. 6(b)). 34 also has a hexagonal cross-sectional shape (see FIG. 7(b)), and if the mandrel has an octagonal cross-sectional shape, the body 35 also has an octagonal cross-sectional shape (see FIG. 8(b)), Each is molded.

Due to the cross-sectional shape of the tubular mandrel, it is possible to mold the cross-sectional shape of the body portions 33-35 into a square, rectangular or other polygonal shape in addition to the body portions 33-35 described above.

In the first example 102 of the tube-shaped container according to the present embodiment, the body portion 33 is attached to the bottom seal portion of the spout portion 3 from the edge of the bottom seal portion 38 (not shown) on the spout portion 3 side or the vicinity thereof. Four linear creases 6 are provided up to the edge of the portion 38 side (the side of the flange portion 13 opposite to the pouring tube portion 16 side) or the vicinity thereof.
In the second example 103 of the tube-shaped container according to the present embodiment, the body portion 34 extends from the edge of the bottom seal portion 39 (not shown) on the spout 4 side or in the vicinity thereof. Six linear creases 6 are provided up to the edge of the portion 39 side (the side of the flange portion 14 opposite to the pouring tube portion 16 side) or the vicinity thereof.
In the third example 104 of the tube-shaped container according to the present embodiment, the body portion 35 extends from the edge of the bottom seal portion 40 (not shown) on the spout 5 side or in the vicinity thereof. Eight linear creases 6 are provided up to the edge of the portion 40 side (the side of the flange portion 15 opposite to the pouring tube portion 16 side) or the vicinity thereof.

By providing the body portions 33 to 35 with the linear creases 6 extending in the height direction as described above, the thickness of the body portions 33 to 35 is reduced by the rib effect of the portions folded by the creases 6. Even so, it is possible to make the trunks 33 to 35 less likely to bend at the time of upside down when displayed or used in a shop. For example, when the caps are attached to the spouts 3 to 5 in a display at a store and the caps are turned upside down, the trunks 33 to 35 are bent and do not stand upside down, resulting in a poor appearance. There is no Also, during use, especially when the content is reduced and a large amount of content enters near the one end on the side opposite to the spout portions 3 to 5, the content is clogged at the bent portions of the body portions 33 to 35. Since there is no need to do anything, it becomes easy to take out the contents. After the contents have decreased, the air can easily move to the vicinity of one end of the barrels 33 to 35 when the contents are taken out, so that the contents can be easily taken out and the contents can be suppressed from remaining. Here, the “height direction” refers to the central axis RR of the tube-shaped container 102 in FIG. 6A, the central axis SS of the tube-shaped container 103 in FIG. a) means the direction of the central axis TT of the tubular container 104 .

As the cross-sectional shape of the body portions 33 to 35 has more corners, that is, as the number of the linear creases 6 increases, the rib effect due to the creases 6 increases, and the thickness of the body portions 33 to 35 can be reduced. Also, the effect of making it difficult for the torso parts 33 to 35 to bend at the time of upside-down when displayed or used in a store is increased. Therefore, among the tube-shaped containers 102 to 104 according to the present embodiment, the third example 104 exhibits the rib effect the most, and even if the thickness of the body is reduced, when it is displayed at the store or used, It has the greatest effect of making it difficult for the torso to bend at the time of handstand.

Further, as shown in FIGS. 6(b), 7(b), and 8(b), cross sections of the body portions 33 to 35 of the tube-shaped containers 102 to 104 according to the present embodiment before filling with contents are shown. The shape is the cross-sectional shape of the trunk portion 31 of the tube-shaped container 100 according to the first embodiment before being filled with the contents shown in FIG. 2, and the tube-shaped container 101 according to the second embodiment shown in FIG. Unlike the cross-sectional shape of the trunk portion 32 before filling with contents, a substantially polygonal shape has already been formed, and a large gap is vacant as a filling port at the time of filling. Therefore, compared to the first and second embodiments in which the creases 6 are provided by applying the ruled lines 7, the body can be easily opened when the contents are filled.

By providing the crease 6, as shown in FIGS. 6(b), 7(b), and 8(b), a gap as a filling port is opened at the time of filling, so that the filling nozzle can be easily inserted as it is. . Further, when filling the contents, for example, when the spout portions 3 to 5 are sealed and the lateral center portions of the body portions 33 to 35 are vacuumed from both sides to open, the body portions 33 to 35 are opened. Since air can easily enter from one end of 35, body portions 33-35 are easily opened.

As described above, when the barrels 33 to 35 are filled with the contents, the gaps as the filling ports are opened in the barrels 33 to 35, and the filling nozzle can be easily inserted as it is. By aiming at the gap from the tip of the nozzle, it is possible to insert the filling nozzle while opening it.

In this embodiment, the body portions 33 to 35 are provided with a linear crease 6, but the body portions 33 to 35 are less likely to be bent when standing upside down, and the body portions 33 to 35 are easy to open when the contents are filled. If so, the crease 6 may be curved instead of straight. In addition, if the body parts 33 to 35 do not easily bend when standing upside down, and if the body parts 33 to 35 are easy to open when filling the contents, one or more of the four or more folds 6 are linear. Other than that, it may be curved. Further, if the body parts 33 to 35 are not easily bent when standing upside down and are easy to open when the contents are filled, at least one crease 6 may be a straight crease 6 or a curved crease 6. The crease 6 may be formed so as to be continuous.

Further, like the tubular containers 102 to 104 according to the present embodiment, when forming the body portions 33 to 35 into a tubular shape during bag making, they are molded with a tubular mandrel having a substantially polygonal cross-sectional shape. Therefore, when the linear creases 6 are provided on the trunk portions 33 to 35, it is preferable to form the trunk portions 33 to 35 so that the transverse cross-sectional shape of the trunk portions 33 to 35 is a regular polygon or symmetrical. By doing so, it is possible to further suppress bending of the back when standing upside down, and the appearance is also good.

The body portions 33 to 35 are filled with the content after the creases 6 are provided, so that the body portions 33 to 35 have a substantially polygonal cross-sectional shape. It is preferable that the shape of the outer peripheral edges of the flanges 13-15 in a plan view is also substantially polygonal so as to match the cross-sectional shape of the trunks 33-35. In other words, it is preferable that the shape of the outer periphery of the flanges 13-15 in a plan view matches the cross-sectional shape of the trunks 33-35. Here, the “plan view of the flange portion” means the plan view of the flange portions 13 to 15 when the spout portions 3 to 5 of the tubular containers 102 to 104 are oriented upward.

As described above, in the tube-shaped container of the present invention, from the edge of the bottom seal portion at one end on the spout portion side or its vicinity to the edge of the spout portion on the bottom seal portion side or its vicinity, There are at least three straight or curved creases all the way through. Since the body portion is formed of a laminated sheet including a paper layer, the crease is easily formed and the crease can be maintained more than the body portion formed of a laminated sheet composed only of a resin layer. can.
By providing the body with a linear crease extending in the height direction as described above, the rib effect of the folded part due to the crease allows the body to be displayed at stores even if the thickness of the body is reduced. In the scene of use, it is possible to make it difficult to bend the waist when standing upside down.
Furthermore, since the trunk portion is provided with the linear creases extending in the height direction as described above, it is easy to open when filling the contents. For example, when the body is manufactured by a bag-making machine, it becomes a cylinder with left and right folds. Easy to insert the nozzle. Also, when filling the contents, for example, even if the middle part in the left-right direction of the body is opened by vacuuming from both sides with the spout part sealed, air is likely to enter from one end of the body. Therefore, the body can be easily opened.

In the tube-shaped container of the present invention, when the cross-sectional shape of the body is substantially polygonal because the body is provided with a crease, for example, when packed in a cardboard box or the like, the tube-shaped container and the cardboard can be separated from each other. There are no unnecessary gaps between boxes, and the area required to pack the same number of containers can be reduced compared to conventional tube-shaped containers whose body has a circular cross section. can be packed in large quantities), so transportation efficiency is good. In addition, it is possible to pack and transport the devices while they are neatly aligned. Also, in the above case, if the shape of the outer peripheral edge of the flange portion in plan view is also substantially polygonal in accordance with the cross-sectional shape of the body portion, the transportation efficiency can be further improved and the alignment can be further neatly arranged. Packing and transportation as is is possible. In addition, since the linear creases form not only a curved surface but also a flat surface on the trunk portion, it is possible to provide a new design.

1 to 5 spout portion 6 crease 7 ruled lines 11 to 15 flange portion 16 spout tube portion 17 half cut 18 pull ring 21 to 25 . Sealant layer 55 Paper protective layer 56 Ink layer 57 Overcoat varnish layer 58 Heat-fusible coat layer 100 Tubular container 101 according to the first embodiment - Tube-shaped container 102 according to the second embodiment... First example 103 of the tube-shaped container according to the third embodiment... Second example 104 of the tube-shaped container according to the third embodiment... Third Third example 200 of tube-shaped container according to the embodiment...An example of conventional tube-shaped container 201...Body part 202 of an example of conventional tube-shaped container...Spout of an example of conventional tube-shaped container Part 203 ... Flange part of an example of a conventional tube-shaped container

Claims (7)

having a spout and a body,
The barrel portion is formed of a laminated sheet containing a paper layer, and is closed by a bottom seal portion positioned at one end of the barrel portion, and the other end of the barrel portion is sealed to the spout portion. At least three straight or curved creases are provided from the edge of the spout portion or its vicinity to the edge of the spout portion on the bottom seal portion side or its vicinity. A tubular container characterized by: The tubular container according to claim 1, wherein the paper layer has a basis weight of 30 g/ ^m2 or more and 300 g/m2 ^or less. The tubular container according to claim 1, wherein the paper layer has a basis weight of 50 g/ ^m2 or more and 150 g/m2 ^or less. 4. The tubular container according to any one of claims 1 to 3, wherein the paper layer is composed of a single layer. The pouring outlet portion has a tubular pouring tube portion and a flange portion connected to one end of the pouring tube portion and extending outward from the pouring tube portion,
The other end of the body is sealed to the flange,
5. The tubular container according to any one of claims 1 to 4, wherein the shape of the outer peripheral edge of the flange portion in a plan view matches the cross-sectional shape of the body portion. The pouring outlet portion has a tubular pouring tube portion and a flange portion connected to one end of the pouring tube portion and extending outward from the pouring tube portion,
The other end of the body is sealed to the flange,
6. The tubular structure according to any one of claims 1 to 5, wherein the other end of the body portion is attached to a surface of the flange portion opposite to the one end side of the body portion. container. 7. The tube-shaped container according to claim 6, wherein the flange portion has a flat plate shape perpendicular to the height direction of the body portion.

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