Tube container

Abstract

Even when the body portion is formed of a single material and made thin, bag rupture is unlikely to occur due to impact during dropping, and the tube container with excellent impact resistance is provided. [Solution] The tube container includes a tubular body portion with one end closed and capable of containing contents, the other end of the body portion a spout closing the other end of the body portion, a cap attached to the spout, and a paper member attached to the body portion made sleeve, the cap comprising a top surface portion and a skirt extending vertically from the edge of the top surface portion portion, wherein the basis weight of the paper of the sleeve is 50 g / m 2 or more, and in the axial direction of the body portion, the sleeve has a length denoted as b, the distance from the open end of the skirt portion to the end of the sleeve on the cap side is denoted as c, and the mass of the contents contained in the body portion is denoted as d (provided that the units of b and c are mm, and the unit of d is g), the tube container satisfying the conditions of c≦0 and (b+c) / d>0.20 tube container.

Description

Technical Field

[0001] The present invention relates to a tube container.

Background Art

[0002] As packaging materials for pharmaceuticals, cosmetics, foods and the like, plastic tube containers constituted by a body portion that stores contents and a spout that dispenses the contents are widely used (Patent Document 1). The body portion of the tube container is formed, for example, by rolling a rectangular sheet including a sealant layer into a tubular shape by welding a pair of end edges of the sheet to each other, and welding one end of the tubular sheet to seal it. The spout is attached to the other end of the formed body portion by welding. In such a tube container, it is common to laminate a plurality of functional layers on the sheet forming the body portion in order to impart functions such as barrier properties and impact resistance. The functional layers often include materials other than plastics, but for the purpose of improving recycling efficiency, monomaterialization of plastic products is required. Accordingly, monomaterialization of the body portion has also been studied for tube containers. However, due to monomaterialization, it is difficult to secure a sufficient melting point temperature difference between the base material layer and the sealant layer constituting the body portion, making it difficult to stabilize the welding of the seal portion, which may cause the strength of the seal portion (back seal portion) to decrease.

[0003] Furthermore, in recent years, as the reduction of plastic waste has been promoted, reduction in the amount of virgin plastic used has been required, and thinning of the body portion of tube containers has been studied.

[0004] ​​​​​​​​However, the reduction in thickness led to a problem of decreased strength in the torso.

[0005] Furthermore, if the tube container is accidentally dropped during transport, display, or storage, the impact of the fall can cause damage. The problem is that the welded parts of the torso (especially the back panel near the joint between the torso and the spout) rupture during impact. There was a problem. In particular, when transporting multiple tube containers packed in a box, the tubes would be damaged if the box were dropped. The two containers were stacked sideways and subjected to an impact, causing the edges of the spouts and caps to be damaged by the other containers. Because it hits the body of the tube container with force, the risk of the bag bursting increases. The risk of bag rupture is present in tube containers having the aforementioned single-material and thinned body. This was particularly likely to occur due to the low strength of the torso. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2016-199280 [Patent Document 2] Japanese Patent Publication No. 2024-044211 [Patent Document 3] Japanese Patent Publication No. 2023-068948 [Patent Document 4] Japanese Patent Publication No. 2023-144492 [Patent Document 5] Patent No. 5922951 [Overview of the project] [Problems that the invention aims to solve]

[0007] In order to suppress rupture of the body of such tube containers, for example, the tube container It is possible to protect all or part of the body of the container with relatively rigid cardboard or similar material. Patent Documents 2 to 5). However, there remains room for study on the conditions that can reliably withstand the impact when the tube container is dropped

[0008] Therefore, the present invention aims to provide a tube container that is less prone to bag rupture due to impact during dropping and has excellent impact resistance, even when the body portion is made of a single material and made thinner [Means for Solving the Problems]

[0009] A tube container according to the present invention includes a tubular body portion that is closed at one end and can contain a content , a spout that closes the other end of the body portion, a cap attached to the spout, and a paper sleeve attached to the body portion , the cap includes a top surface portion and a skirt portion extending vertically from an edge of the top surface portion, and the basis weight of the paper of the sleeve is more than 50 g / m 2 , in the axial direction of the body portion, when the length of the sleeve is defined as b, the distance from the open end of the skirt portion to the end portion of the sleeve on the cap side is defined as c, and the mass of the content contained in the body portion is defined as d (provided that the units of b and c are mm, c is a value with the open end of the skirt portion as the reference position, the value is positive when the end portion of the sleeve on the cap side is located closer to the one end side of the body portion than the reference position , the value is negative when the end portion of the sleeve on the cap side is located closer to the top surface portion side of the cap than the reference position, and the unit of d is g), the conditions of c≦0 and (b+c) / d>0.20 are satisfied [Effects of the Invention]

[0010] According to the present invention, it is possible to provide a tube container that is less prone to bag rupture due to impact during dropping and has excellent impact resistance, even when the body portion is made of a single material and made thinner [Brief Description of the Drawings]

[0011] ​​​​​​​​ [Figure 1] A perspective view showing the schematic configuration of a tube container according to the embodiment. [Figure 2A] Cross-sectional view along the line II-II shown in Figure 1 [Figure 2B] Cross-sectional view along the line II-II shown in Figure 1 [Figure 3] A cross-sectional view showing an example of a sheet that makes up the body of a tube container. [Figure 4] Front view showing the schematic configuration of the tube container according to the embodiment. [Modes for carrying out the invention]

[0012] Figure 1 is a front view showing the schematic configuration of a tube container according to an embodiment, and Figures 2A and 2A and 2A are shown. B is a cross-sectional view along the line II-II shown in Figure 1, and Figure 3 is the body of the tube container. Figure 4 is a cross-sectional view showing an example of a sheet that makes up the structure, and Figure 4 is a general view of the tube container according to the embodiment. This is a front view showing the approximate configuration. Note that in Figure 4, the skirt of the sleeve 4 and cap 3 is shown. This shows a case where part 32 partially overlaps with part 32.

[0013] The tube container 100 has a tubular body 1 and a spout 2 attached to the body 1. , a cap 3 that attaches to spout 2, and a paper sleeve 4 that attaches to body 1. It is equipped with the following.

[0014] (torso) The body portion 1 is a component for containing contents and has a pair of substantially parallel, opposing edges. A rectangular sheet 11 is rolled into a cylindrical shape, and the pair of edges of the sheet 11 are bonded together to form the sheet. As for the method of bonding the pair of edges of sheet 11 together, Envelope pasting involves overlapping and welding the inner and outer surfaces of the strip-shaped sections containing each of these parts (Figure 2A). The inner surfaces of the strip-shaped portions, each including a pair of edges of sheet 11, are brought together in a gable-like manner. A gusseted joint (Figure 2B) is used, which is then welded together. The bonded portion of the welded sheet 11 is designated as the back bond portion 7. One end 5a of the body portion 1 (Figure 1 The lower end (in Figure 1) is sealed and closed. On the other hand, the other end 5b of the body 1 (in Figure 1) The portion near the upper end is folded and is on the outer surface 23 of the flange portion 22 of the spout 2. It is sealed. At the welded joint between the body portion 1 and the flange portion 22, the sheet 1 that constitutes the body portion 1 Multiple pleats 12 are formed by folding 1. The length a of the body 1 (from one end 5a) The vertical distance to the other end 5b depends on the contents, use, and display configuration of the tube container 100. This can be changed as appropriate and is not particularly limited, but for example, it may be between 100mm and 200mm. It is possible.

[0015] The sheet 11 that constitutes the body 1 of the tube container 100 has a pair of edges that meet each other. The method of bonding by welding is not particularly limited. That is, sheet 11 is attached to an envelope. When forming the body 1 by doing so, the outermost and innermost layers of the sheet 11 are sealed with a sealant. It is fine to use a layer. When forming the body 1 by joining sheets 11 together, at least The innermost layer should be a sealant layer. However, the recyclability of the tube container 100 must be considered. Then, the material that makes up sheet 11 is a single material of plastic (monomaterial) It is preferable to select one that will be realistic, and considering the thinning of the torso 1, It is preferable to use a gable roofing system that allows for the omission of the outer sealant layer.

[0016] (Base film layer) The base film layer 13 is a layer that imparts physical strength such as heat resistance and toughness to the sheet 11. Yes. The base film layer 13 is also the base layer for the barrier layer 14. The material of the film constituting 3 is not particularly limited, but from the viewpoint of heat resistance and physical strength, It can also be used as a sealant layer 15 for polypropylene, polyethylene, polyester, etc. It is preferable to use a stretched film.

[0017] (Barrier layer) The barrier layer 14 is a functional layer that blocks oxygen, water vapor, etc., to improve the preservation of the contents. The barrier layer 14 is made of, for example, a vapor-deposited film of an inorganic compound such as silica or alumina, a plate-like mineral, and / or it can consist of one or more types of barrier coatings containing barrier resins. The barrier resin used in the barrier coating agent is ethylene-vinyl alcohol copolymer. It can use materials such as EVOH and polyvinylidene chloride (PVDC), and barrier coating The binder resin other than the barrier resin is appropriately blended into the binder agent. The barrier layer 14 is pre-formed The barrier film may be formed by lamination on a substrate such as the material film layer 13, or It may be provided as a layer film. In this invention, the barrier layer 14 is a transparent layer for environmental reasons. It is preferable to do so.

[0018] (Sealant layer) The sealant layer 15 is used for welding the sheets 11 together in the back panel 7 and for bonding the spout 2 to the body. This is a layer provided for welding to part 1. When the back sealing part 7 is formed by envelope sealing, The lantern layer 15 is provided on the outermost and innermost layers of the sheet 11. The backing portion 7 is joined together. When formed by palm application, the sealant layer 15 is provided at least in the innermost layer of the sheet 11. The material of the sealant layer 15 is not particularly limited, but may include polypropylene, polyethylene, and poly It is preferable that the material be a thermoplastic resin such as an ester.

[0019] The thermoplastic resin used in the sealant layer 15 is the same thermoplastic resin that makes up the material of the spout 2, which will be described later. It is sufficient that it adheres to plastic resins, and is made of the same material as the thermoplastic resin used in spout 2. It is preferable that the thermoplastic resin used in the sealant layer 15 and the thermoplastic resin used in the spout 2 are present. By making the plastic resin layer the same, the sealing strength between the body 1 and the spout 2 is improved. It is possible.

[0020] As described above, each functional layer constituting the seat 11 has been explained, but the body 1 is made of a single material When composed of the above, sheet 11 is made of polyethylene, polypropylene, and polyolefin (poly It is preferable that it consists of only one of the following (a combination of ethylene and polypropylene). In such cases, for example, the following layer configurations A, B, C, and D can be given. Layer configuration A In case B, the back-sealed portion 7 can be formed by gusseting, and in layer configurations C and D, the back-sealed portion 7 is an envelope It can be formed by bonding. Layer composition A: PET / Barrier PET / Unstretched PET Layer configuration B: OPP / Barrier OPP / CPP Layer configuration C: CPP / OPP / Barrier OPP / CPP Layer configuration D: PE / OPP / Barrier OPP / PE PET: Biaxially oriented polyethylene Barrier PET: Barrier biaxially oriented polyethylene Unstretched PET: Unstretched polyethylene OPP: Biaxially Oriented Polypropylene Barrier OPP: Barrier biaxially oriented polypropylene CPP: Unoriented polypropylene PE: Unstretched polyethylene Furthermore, the thickness of each layer can be determined as appropriate, but from the viewpoint of thinning the body 1, layer configuration A, In case B (for mortise and tenon jointing), the total thickness is 80 μm or more and 140 μm or less, and the layer composition is C, D (sealing In the case of tubular application, the thickness is preferably between 120 μm and 250 μm.

[0021] (Spout) The spout 2 is a component for dispensing the contents contained in the body 1 to the outside, and is cylindrical. It comprises a dispensing cylinder portion 21 and a flange portion 22. The flange portion 22 is located at one end of the dispensing cylinder portion 21. It is a flat plate-shaped portion connected to the lower end (in Figure 1) and extending outward from the dispensing cylinder portion 21. In this embodiment, the flange portion 22 is in a direction perpendicular to the axial direction of the dispensing cylinder portion 21 (as shown in Figure 1). It is formed to extend in the left-right direction. In this embodiment, the flange portion 22 is Although it is formed in an annular shape, the shape of the flange portion 22 is such that the body portion 1 can be joined. The shape is not limited to ellipses, ovals, track shapes, polygons, etc.

[0022] Spout 2 may be molded from a thermoplastic resin, or from a thermoplastic resin and a material other than resin. It may be molded from a material containing a film. The thermoplastic resin used for the material of spout 2 is For example, one of polyethylene, polypropylene, or polyester, Two or more types can be used in combination. Fillers include talc, kaolin, and paper. One type of powder and / or cellulose fiber, or a combination of two or more types, can be used. To make it work, a mixture of thermoplastic resin and a filler other than resin is used as the material for spout 2. This reduces the amount of resin used while maintaining moldability and heat-welding properties with the sheet material of the body 1. This becomes possible. The molding method for spout 2 is not particularly limited, but injection molding, vacuum molding, etc. are possible. Existing molding methods such as thermoforming (shape and hot plate pressure forming) and compression molding It is available.

[0023] A method for welding the body 1 and spout 2 during the manufacturing of the tube container 100 is ultrasonic Welding, high-frequency welding, heat seal welding, hot air welding, compressor for body inserts Molding and other similar processes can be used.

[0024] Furthermore, in order to maintain an airtight seal inside the tube container 100 when it is unopened, A film that closes the dispensing cylinder 21 is attached to the end of the dispensing cylinder 21 opposite to the flange portion 22. It may be sealed. Alternatively, the inside of the dispensing cylinder 21 may be closed by a partition wall. When a partition wall is provided, a circular half-cut is provided along the inner circumference of the dispensing cylinder portion 21, and It is preferable to provide a pull ring that connects to the portion enclosed by the half-cut. With this configuration, when opening the tube container 100, the user pulls the pull ring. By breaking the half-cut portion of the bulkhead, the bulkhead surrounded by the half-cut A portion is removed to form an opening for dispensing the contents from the body 1 to the dispensing cylinder 21. It is possible.

[0025] (cap) The cap 3 is detachably attached to the dispensing cylinder portion 21 of the spout 2, for example, as shown in Figure 1. As shown, it can be a screw cap that can be screwed onto spout 2. Cap 3 It comprises a flat top surface portion 31 and a skirt portion 32 extending vertically from the edge of the top surface portion 31. The inner circumferential surface of the skirt portion 32 is screwed with the male threads formed on the outer circumferential surface of the dispensing cylinder portion 21. A female thread is formed. With the cap 3 attached to the spout 2, the skirt The open end of section 32 (the lower end in Figure 1) is located near the flange portion 22 of the spout 2. This is preferable.

[0026] Also, cap 3 can be a hinged cap instead of a screw cap. When using the top 3 as a hinge cap, the hinge cap is screwed onto the dispensing cylinder portion 21. It may also be attached to part 2. Alternatively, ribs may be provided on the outer surface of the dispensing cylinder part 21 instead of threads. Alternatively, the hinge cap may be attached to spout 2 by fitting through a rib.

[0027] Furthermore, the cap 3 is not a screw cap, but is fitted to the dispensing cylinder 21 by pressing it into place. A cap is also acceptable.

[0028] (sleeve) The sleeve 4 is attached to the outer surface of the body 1 to enhance its impact resistance. Therefore, tube containers with a thin body 1, or body 1 made from a single material of plastic It can be suitably used in tube containers that have relatively poor impact resistance, such as those made of tubular material.

[0029] From a recyclability standpoint, it is preferable that the sheets constituting sleeve 4 consist solely of paper. Furthermore, it is preferable that the sleeve 4 be detachably attached to the tube container 100. The paper weight for sleeve 4 is 50 g / m². 2 Let's assume it exceeds 50 g / m². 2 In the following cases The sleeve 4 lacks sufficient strength, and does not prevent the body 1 from rupturing when the tube container 100 is dropped. This becomes difficult.

[0030] The surface of sleeve 4 may be printed with various markings. A protective layer or the like may be provided on the surface of the sleeve 4 as appropriate.

[0031] Here, in the axial direction of the body 1, the length of the sleeve 4 is b, and the skirt portion of the cap 3 is 3 Let c be the distance from the open end of 2 to the end of sleeve 4 on the cap 3 side (Figure 4). The units of b and c are in mm, and c is the reference position with respect to the open end of the skirt portion 32 (as shown in Figure 4). The value is the position indicated by X, and the end of sleeve 4 on the cap 3 side is from the reference position X. The value when the body part 1 is at one end 5a (the upper side of the paper in Figure 4) is considered positive, and the sleeve 4 The end on the cap 3 side is on the top surface 31 side of the cap 3 (the bottom side of the paper in Figure 4) from the reference position X. The value when it is in ) is considered negative. Also, the mass of the contents contained in the body 1 is d (where d The unit of is g). In this embodiment, c ≤ 0 and (b+c) / d The condition of >0.20 is met. By meeting these conditions, the impact of the fall is not affected. This protects the body 1 around the flange portion 22, which is prone to damage.

[0032] (Effects / Actions) When the tube container 100 is subjected to an impact during a fall, the flange portion 22 of the tube container 100 Because the internal pressure in the vicinity increases instantaneously, the area around the flange portion 22, which is joined by welding, The bag is prone to tearing from the back seal 7. Also, the tube container filled with contents is packed in multiple boxes. Although they are transported in packs of several, the tube containers can be damaged by vibrations and impacts from drops during transport. The officer provides cushioning. Therefore, when the tube container 100 falls on its own (hereinafter referred to as "on its own") When multiple items are packed in a box and fall (hereinafter referred to as "collective fall"), rather than when they simply fall, The tube containers are more prone to breakage when multiple tube containers are placed side by side. If they fall and are hit while overlapping in the same direction, the edges of spout 2 and cap 3 will be damaged by the impact. The forceful impact with the body 1 of the tube container makes it even easier to tear the bag.

[0033] Furthermore, if the body 1 is made of a single material to enhance recyclability, then the sheet 1 To ensure a sufficient melting point temperature difference between the base film layer 13 and the sealant layer 15 of 1. It becomes more difficult, and it becomes difficult to soften only the sealant layer 15. Therefore, the substrate fill It is necessary to suppress the welding temperature to match the melting point temperature of the layer 13, thereby the seal part The strength of the material decreases, making it more susceptible to tearing when subjected to impact. Also, the amount of plastic used... If the body section 1 is made thinner to reduce its size, the strength of the body section 1 will decrease, and similar ruptures will occur. It's cheap.

[0034] However, in this embodiment, a paper sleeve 4 is attached to the body 1. The body 1 is reinforced by this. And, as mentioned above, the basis weight of the paper of the sleeve 4 is 50 g / m 2 If the condition is greater than or equal to c ≤ 0 and (b+c) / d > 0.20, In this case, even if the body part 1 is made of a single material, the tube container may rupture due to the impact of a fall. It can suppress the urge to squirt.

[0035] As described above, the tube container 100 according to this embodiment has a paper sleeve on the body 1. The inclusion of the 4 improves the impact resistance of the body 1. And the sleeve 4 The paper's basis weight is 50 g / m². 2 Furthermore, the length of the sleeve 4 is b, and the skirt part of the cap 3 Let c be the distance from the open end of 32 to the end of sleeve 4 on the cap 3 side, and let d be the mass of the contents. In this case, the conditions c ≤ 0 and (b+c) / d > 0.20 are satisfied. This can more effectively improve the impact resistance of the body 1, and a single drop into the tube container 100 is possible. Furthermore, even if an impact occurs due to a fall, the body portion 1 will not tear from the back portion 7. It is possible.

[0036] Furthermore, the body 1 of the tube container 100 is made of a single material. This makes the body 1 multi-layered. The recyclability of the tube container 100 can be improved compared to when it is made of composite materials. .

[0037] Furthermore, the back panel 7 of the body part 1 may be formed by envelope pasting. A sealant layer 15 is laminated on the outermost layer of the sheet 11 that makes up the structure, and the back-attached portion 7 is attached with a gable joint. Compared to the case where it is formed, the thickness of the sheet 11 becomes thicker. Therefore, the impact resistance of the body 1 It can be improved.

[0038] Furthermore, the back panel 7 of the torso 1 may be formed by a rafter pattern. Compared to the case where part 7 is formed by sealing an envelope, the outermost layer of sheet 11 that constitutes the body part 1 The lunt layer 15 can be omitted, reducing the amount of plastic used.

[0039] Furthermore, the sheets that make up sleeve 4 are made only of paper. This can improve its recyclability. [Examples]

[0040] The following describes specific examples of the present invention. First, a tube for single drop testing. The container was made using the following procedure.

[0041] (Example 1-1-1) Sheet 1 has a layer structure consisting of OPP13 / barrier OPP20 / CPP80 from the outermost layer. I created sample 1. The numbers listed after the material names indicate the thickness of the layers made up of each material. The unit is μm.

[0042] The fabricated sheet 11 was processed using a back-sealing bag-making machine to produce a tube with a diameter of 35 mm. In this case, the back panel 7 was formed by joining the panels together.

[0043] Spout 2 and cap 3 were molded by injection molding using polypropylene resin. Length of the skirt portion 32 of cap 3 (length from the top portion 31 to the open end of the skirt portion 32) It was 15mm.

[0044] The fabricated body 1 and spout 2 were heat-welded together using a specialized processing device. After that, water was added. Fill with 30g and seal the spout 2 and the opposite end of the body 1. Insert a paper sleeve 4 into the body 1. A tube container having a body 1 with an inner diameter of 35 mm was fabricated. Length a, length b of sleeve 4, distance from the open end of skirt portion 32 to the cap 3 side of sleeve 4. The distance c to the edge and the basis weight of the paper in sleeve 4 were as shown in Table 1.

[0045] (Examples 1-1-2 to 1-1-6, Comparative Examples 1-1-1 to 1-1-4) The length b of sleeve 4, from the open end of the skirt portion 32 to the end of sleeve 4 on the cap 3 side. Except for the distance c and the basis weight of the paper in sleeve 4 being as shown in Table 1, Example 1-1- A tube container was prepared in the same manner as in 1. However, the tube container in Comparative Example 1-1-1 was I didn't install the Leave 4.

[0046] (Examples 1-2-1 to 1-2-2, Comparative Examples 1-2-1 to 1-2-3) The amount of water to be filled was set to 100g, and the length b of the sleeve 4 and the opening of the skirt portion 32 were also specified. Table 1 shows the distance c from the edge to the end of sleeve 4 on the cap 3 side, and the basis weight of the paper in sleeve 4. Except for the fact that it was carried out as described, a tube container was prepared in the same manner as in Example 1-1-1. However, The tube container in Comparative Example 1-2-1 did not have sleeve 4 attached.

[0047] (Examples 2-1-1 to 2-1-2, Comparative Examples 2-1-1 to 2-1-3) The composition of sheet 11 is OPP13 / barrier OPP20 / CPP100, and the body The back of part 1, part 7, was formed by envelope gluing, and the length b of the sleeve 4, the skirt part 32 The distance c from the open end to the end of sleeve 4 on the cap 3 side, and the basis weight of the paper in sleeve 4. Except for the steps shown in section 2, the tube container was prepared in the same manner as in Example 1-1-1. Furthermore, the tube container in Comparative Example 2-1-1 did not have a sleeve attached.

[0048] (Examples 2-2-1 to 2-2-2, Comparative Examples 2-2-1 to 2-2-3) The amount of water to be filled was set to 100g, and the length b of the sleeve 4 and the opening of the skirt portion 32 were also specified. Table 2 shows the distance c from the edge to the end of sleeve 4 on the cap 3 side, and the basis weight of the paper in sleeve 4. Except for the fact that it was carried out as described, a tube container was prepared in the same manner as in Example 2-1-1. However, The tube container in Comparative Example 2-2-1 did not have a sleeve 4 attached.

[0049] (Examples 3-1-1 to 3-1-2, Comparative Examples 3-1-1 to 3-1-3) The configuration of sheet 11 is CPP100 / OPP20 / Barrier OPP20 / CPP100 The back portion 7 is formed by envelope sealing, and the tube container has a body portion 1 with an inner diameter of 50 mm. The fact that it was used as a container, that 200g of water was used to fill it, and the length a of the body 1, the sleeve 4 Length b, distance c from the open end of the skirt portion 32 to the end of the sleeve 4 on the cap 3 side, Except for using the basis weight of the Leave 4 paper as shown in Table 3, the process was the same as in Example 1-1-1. A tube container was fabricated. However, the tube container in Comparative Example 3-1-1 had a sleeve 4 removed. I didn't attach it.

[0050] (Examples 3-2-1 to 3-2-3, Comparative Examples 3-2-1 to 3-2-3) The amount of water to be filled was set to 150g, and the length b of the sleeve 4 and the opening of the skirt portion 32 were also specified. Table 3 shows the distance c from the edge to the end of sleeve 4 on the cap 3 side, and the basis weight of the paper in sleeve 4. Except for the fact that it was done in the same manner as in Example 3-1-1, a tube container was prepared. However, The tube container in Comparative Example 3-2-1 did not have a sleeve 4 attached.

[0051] (Single unit drop test) Ten tube containers each were prepared for the examples and comparative examples. It was allowed to fall naturally from a height of 100 cm so that it was horizontal to the ground. After that, Each tube container should be positioned vertically to the ground with cap 3 facing downwards, at a height of 100 cm. The tube containers were allowed to fall naturally from their positions, and the presence or absence of rupture in the packaging was checked.

[0052] If none of the 10 tube containers were ruptured, mark it as ○; otherwise, mark it as ×. The evaluation was then conducted.

[0053] Tables 1-3 show the length a of the torso 1, the length b of the sleeve 4, and the length from the open end of the skirt 32 to the sleeve. c is the distance from the end of sleeve 4 to the end of cap 3, d is the mass of the contents (water), and the basis weight of the paper of sleeve 4. Quantity, value of (b+c) / d, and results of the individual drop test (number of tube containers that did not rupture, The evaluation results are summarized below.

[0054] [Table 1]

[0055] [Table 2]

[0056] [Table 3]

[0057] Next, a tube container for the cumulative drop test was prepared using the following procedure.

[0058] (Example 4) Sleeve length b, from the open end of the skirt portion 32 to the cap end of the sleeve 4 Except for the distance c being as shown in Table 4, the tube container was made in the same manner as in Example 1-1-1. It was made.

[0059] (Comparative Example 4) A tube container was prepared in the same manner as in Example 4, except that sleeve 4 was not attached. .

[0060] (Example 5) The composition of sheet 11 is OPP20 / barrier OPP20 / CPP100, and backing The fact that the rib portion 7 was formed by sealing an envelope, and the length b of the sleeve 4, and the open end of the skirt portion 32 Except for the distance c from the end of sleeve 4 to the end of cap 3, as shown in Table 5, A tube container was prepared in the same manner as in Example 1-1-1.

[0061] (Comparative Example 5) A tube container was prepared in the same manner as in Example 5, except that sleeve 4 was not attached. .

[0062] (Accumulated drop test) Eighteen tube containers were prepared for both the examples and comparative examples, measuring 115 mm in length and width. It will fit 3 vertically and 6 horizontally in a 215mm x 200mm high cardboard box (A flute). The sea urchins were packed. The cardboard boxes were placed at a height of 80cm according to the JIS Z 0200 standard. Then, let the tube container fall naturally so that it is horizontal to the ground, and check the individual bags of the tube container. I examined them.

[0063] If no tube containers were ruptured, the result is marked with a circle (○); otherwise, it is marked with a cross (×). They did that.

[0064] Tables 4-5 show the length a of the torso 1, the length b of the sleeve 4, and the length from the open end of the skirt 32 to the sleeve. c is the distance from the end of sleeve 4 to the end of cap 3, d is the mass of the contents (water), and the basis weight of the paper of sleeve 4. Quantity, (b+c) / d value, and results of the cumulative drop test (number of ruptured tube containers, and evaluation) The valuation results are summarized below.

[0065] [Table 4]

[0066] [Table 5]

[0067] As can be seen from the results shown in Tables 1-5, the basis weight of the paper in sleeve 4 is 50 g / m². 2 And, By satisfying all the conditions c≦0 and (b+c) / d>0.20, the simple drop and This design helps prevent the tube container from rupturing even when subjected to impact from dropping and accumulating. [Industrial applicability]

[0068] The tube container according to the present invention can be used as packaging material for pharmaceuticals, cosmetics, and food products. . [Explanation of Symbols]

[0069] 1: Torso 2: Spout 3: Cap 4: Sleeves 5a: One end 5b: Other end 7: Back panel 11: Sheet 21: Pour cylinder part 22: Flange section 23: External surface 31:Top section 32: Skirt section 100: Tube container X: Reference position

Claims

1. One end is closed, and it is a tubular body capable of containing contents, and the other end of the body is closed A spout, a cap attached to the spout, and a body attached to the body It comes with a paper sleeve, The aforementioned cap is The top surface and, It comprises a skirt portion extending vertically from the edge of the top surface portion, The paper weight of the aforementioned sleeve is 50 g / m². ２ It is super, In the axial direction of the body portion, the length of the sleeve is b, and from the open end of the skirt portion forward... c is the distance from the end of the sleeve to the cap side, and the mass of the contents contained in the body. If we let d be (where the units of b and c are mm, and c is the open end of the skirt portion) A value with the reference position being such that the end of the sleeve on the cap side is less than the reference position The value when it is on one end of the body is defined as positive, and the end of the sleeve on the cap side is forward. (The value when the cap is on the top surface side of the reference position is considered negative, and the unit of d is g.) A tube container that satisfies the conditions c ≤ 0 and (b + c) / d > 0.

20.

2. The tube container according to claim 1, wherein the body portion is made of a single material.

3. The body portion comprises the inner and outer surfaces of a strip-shaped portion that includes each of the pair of edges of the rectangular sheet. A tube container according to claim 2, formed by overlapping and welding together two parts.

4. The body portion has inner surfaces of strip-shaped portions that include each of the pair of edges of the rectangular sheet, A tube container according to claim 2, formed by butting and welding together in a gable shape. 。

5. The tube container according to claim 1, wherein the sheet constituting the sleeve is made solely of paper.

Images