KR20180121987A - Tubular container with outer tube and inner container - Google Patents

Abstract

The present invention relates to a tubular container (1) made of a flexible material and comprising an outer tube (10) and an inner container (30) received in the interior of the outer tube (10) and intended to contact the product . A flexible shoulder 32 of the inner vessel 30 is fixed to the head 12 of the outer vessel 10 and an intermediate cavity 7 is formed between the outer tube 10 and the inner vessel 30. [ At least one hole 24 connects the intermediate cavity 7 and the outside of the tubular container 1. The head 12 may include a no-air or one-way valve. The outer tube 10 can recover its shape while the inner container 30 is in the compressed state during use of the tubular container 1. [ The outer tube 10 and the inner vessel 30 are preferably made of a material that satisfies other requirements. The distal end 36 of the inner vessel 30 is preferably extended relative to the outer tube 10.

Description

Tubular container with outer tube and inner container

The present invention relates to a tubular container made of a flexible material for accommodating cosmetics, foods, medicines and the like, and more particularly to a tubular container having an outer tube and an inner container accommodated inside the outer tube.

The use of flexible plastic tubes is widespread in cosmetics, pharmacy or food. The flexible plastic tube is characterized by a hollow body or skirt for containing a product (e.g. a cosmetic cream) and a head disposed at one end of the skirt to permit discharge or administration of the product. The head may be fitted with a neck to provide a product outlet, a cap, or a dosing device. Once the tube is filled with the product, the opposite end of the head of the skirt is typically sealed by heat transfer welding, such as hot air, hot clamping, ultrasonic or the like.

Such a flexible plastic tube is obtained through various manufacturing methods such as extrusion, co-extrusion, injection molding and the like. Similarly, various methods are known for providing beneficial or decorative elements, including letters, graphics, pictures, etc., to flexible plastic tubes directly or by incorporating separate elements such as labels. For example, a flexible plastic tube can be decorated using techniques such as offset, flexography, silk screen printing, stamping, self-adhesive labels, and the like. BACKGROUND OF THE INVENTION [0002] In injection molding tube manufacturing processes, techniques known as in-mold labeling (IML), which provide labels to tubes, are known in the art.

Despite extensive market implementation, the manufacture of flexible plastic tubes presents specific problems that have not yet been solved.

For example, the first problem is that it is difficult to select the tube making material, especially in the injection molding process. The material used must have very special properties and must meet the requirements which, for example, are machinable and provide adequate weldability, impermeability, environmental stress crack resistance (ESCR), and the like. When applied to the food industry, the material must meet the stringent requirements for food contact safety, as the tube on the market must be in direct contact with the packaged product. In the fields of cosmetics, nutrition and pharmacology, materials must meet certain fitness requirements, such as non-toxic, global specific migration, because tubes often require direct contact with the product to be ingested or applied to the body. In general, the fulfillment of these properties and requirements is achieved through the selection and use of polymer compounds and other components, especially in the case of tubes made by injection molding. However, obtaining polymeric compounds that meet a variety of requirements, including mechanical requirements, food contact requirements, non-toxic requirements, processability requirements, etc., is extremely complex and costly. It should also be added that the use of macromolecular compounds is complicated to maintain and ensure the properties of the compound due to the tolerances of the basic parameters (fluidity, density, stiffness, etc.) of the macromolecules involved in the compound. For this reason, it is very complicated to obtain a polymeric compound that can balance all the properties required to successfully manufacture and use the tube, especially if the tube is an injected tube. In addition, the need to obtain polymeric compounds that meet stringent food contact or non-toxic requirements directly excludes a large number of polymers for use in preparing the compounds. This further hinders the design of macromolecular compounds.

The second problem relates to the type of tube known in the prior art, one type actually consisting of two tubes provided in another tube. The solution with different tubes in one tube is a non-air-tight container that prevents the inflow of air into the container to improve the preservation of the packaged product (e.g., product without additive cream, serum, vitamin C, etc.) It is commonly used to obtain containers. This solution is also commonly used to solve the effects of tube collapse on use. In this type of tubular container, the inner and outer tubes are equipped with a head having a skirt and an outlet neck. The inner and outer tubes are joined by an outlet neck. This solution provides defects in obtaining a high recovery rate (the ability to carry all the contents of the tube) because the tube's head is so rigid that the tube can not be completely collapsed.

The third problem is that in the previous paragraph or in a two-product container (a tubular container consisting of an inner tube and an outer tube, which includes two different products, and the outer tube has two outlet orifices for two products Such as tubular containers that are ejected and mixed together at the same time that the two products are applied at the same time. In order to assemble the above-described double-tube container, the skirt of the inner tube and the skirt of the outer tube are large in diameter so that the inner tube can be assembled inside the outer tube. This means that when the ends of the skirts are planarized for the combined sealing of the skirts, there is no complete sealing between the skirts of the inner and outer tubes, resulting in sealing failure. More specifically, in the central region, the seal has four wall thicknesses, but there are only two wall thicknesses on the sides. When compressing the clamp, the walls are welded at the correct pressure in the area of the four walls, but the pressure is insufficient in the area of the two walls, resulting in welding failure in the area. This slack also hinders the introduction of welding nozzles which must be adjusted very precisely inside the tube.

It is an object of the present invention to provide a novel designed tubular container which solves at least one of the remaining problems.

It is an object of the present invention to provide a tubular container made of a flexible material for accommodating cosmetics, foods, medicines and the like, and a method for manufacturing the flexible tubular container. The tubular container includes an outer tube and an inner container. The outer tube includes a skirt and a head, and the head usually includes a neck, a thread, and the like. The inner container is equipped with a skirt and a shoulder provided at the proximal end of the skirt according to a preferred embodiment of the present invention. The shoulder is a cap with an open cap, i.e., an orifice, which does not completely close the proximal end of the skirt of the inner container. The shoulder is flexible or deformable and preferably exhibits plastic deformation. The inner container is received within the outer tube and the shoulder of the inner container is preferably sealed in the interior of the head of the outer tube and once the proximal end of the tubular container is sealed, Thereby providing the container with fluid sealability. Thus, the inner vessel does not have a typical tube head in a conventional flexible tube (with a neck, a thread, etc.); Instead, when welding to an outer tube, the inner container discharges its contents using a neck, a threaded portion, or the like of the head of the outer tube. That is, the inner vessel shares or uses the neck of the outer tube's hub. It is also preferred that the shoulder exhibits a high deformability without jeopardizing the welding of the shoulder to the head of the inner vessel. Also, the shoulder is preferably made of a laminate composite material (aluminum or otherwise) that is the same as or similar to the skirt of the inner container, and provides cost advantages and very high deformation capacity (deformation is plastic deformation, To be permanently collapsed).

The gap is formed between the inner vessel and the outer tube. Preferably, the tubular container can be restored to its original shape after use, i. E. By pressing the tubular container to remove the product contained therein. On the other hand, it is preferable that the inner vessel is maintained in a deformed state by a one-way valve that prevents air from returning to the inner side of the inner vessel. Preferably, the one-way valve is disposed in the head of the outer tube, in a cap fixed to the head of the outer tube, or in an additional component such as an applicator or pump. It is also preferred that the distal end of the inner vessel is deformed and widened (or flared) to abut adjacent the distal end of the outer tube. The outer tube and the inner vessel may be made of different materials so that the inner vessel intended to remain in contact with the packaged product meets the requirements associated with this function while the outer tube maintained in an externally visible state Such as having one or more ornamental elements, labels, etc., on the outer tube.

An initial advantage provided by at least some of the embodiments of the present invention, and in particular the material of the outer tube and inner container, by meeting different requirements is that the selection of material is simplified. This solves to some extent one of the major problems of the injected tube and the remainder of the tube manufacturing technique which requires the use of extruded tubes and materials with high requirements and properties. For example, the possibility of using recycled materials is a current option, in particular for the production of outer tubes, because these recycled materials are not brought into contact with the packaged product so that the tubular container is packaged in the food, To meet the current legislation related to

Additional advantages provided by at least some of the embodiments of the present invention include, for example, the ability to reduce the thickness of the outer tube compared to a conventional extruded tube that does not include a double wall version for the present invention Point, which is merely mechanical in the case of the outer tube of the present invention, and does not need to be in contact with the packaged product. This reduction in thickness is not possible when the product is in contact with an outer container because permeability is affected. By having a small wall thickness, the container may be more permeable and thus may not adequately protect the product contained therein and, as a result, some of the product components may penetrate and the characteristics of the product may vary. In the present invention, the impermeability required for a tubular container is provided by an inner container which can be made of a laminate material (laminated composite material) comprising an aluminum film or polymer barrier or simply a monolayer structure having necessary impermeability, The permeability of the tube is irrelevant. In the case of an injected tube, a wall thickness reduction would not be possible since this reduction has a significant impact on the complexity in obtaining a good filling of the injection cavity. To address this situation, it is known that the use of more fluid polymers in the plastic injection field can produce products with thinner walls, but this increase in fluidity generally involves a change in critical properties such as ESCR .

An additional advantage provided by at least some of the embodiments of the present invention, and in particular the tubular container by restoring its appearance after use, is that the tubular container provides better ergonomics in use. This is due to the fact that pressure is always applied on the expanded tubular container, that is, the container that is formed as if it is fully charged, to enable a more comfortable operation in the user's hand to extract the stored product. Another advantage of these embodiments is that the tubular container can maintain unaltered appearance. That is, even if used repeatedly, it can be maintained as new, so that the optimum appearance can be preserved during the useful life. This is true even in the embodiment where there is no air in the tubular container because the outer tubing is an inner container that remains deformed while restoring the original shape.

A further advantage provided by at least some of the embodiments of the present invention, and in particular by the internal fixation of the shoulder of the inner container to the head of the outer tube, is that the two tubes have heads and the two heads of the tubes are assembled together A more effective and durable fixation between the two tubes is obtained as compared to the double tube solution of FIG. In addition, these embodiments improve recovery rates as compared to the conventional double tube solution wherein the two tubes are secured by respective heads. This increase in recovery rate does not allow the head of the inner vessel to be completely or nearly collapsed, even if the prior art solution is manufactured to a smaller thickness than the head of the outer vessel, but instead, the shoulder of the inner vessel is flexible in the tubular vessel of the present invention Is preferably made of a laminated plastic or metal-plastic composite material, and is welded to the inner portion of the head of the outer tube, allowing collapse as a result of the flexibility of the shoulder.

Another advantage provided by at least some of the embodiments of the present invention, and in particular by widening the distal end of the inner vessel and abutting the distal end of the outer tube, is that the sealing of the distal end of the tubular vessel is significantly improved.

The details of the invention can be seen in the accompanying drawings, which are not intended to limit the scope of the invention.
1 is a front cross-sectional view of an outer tube of a tubular container according to an embodiment of the present invention wherein the outer tube comprises a skirt, a head and two one-way valves.
Figure 2 is a front cross-sectional view of a skirt and shoulder that are separately made to form the inner container of the tubular container according to one embodiment of the present invention.
Figure 3 illustrates a front cross-sectional view of the skirt and shoulder of the previous figure, joined together to form an inner container.
4 shows a front cross-sectional view of an inner container inserted into the inner space of the outer tube;
5 illustrates a front cross-sectional view of an inner vessel completely inserted into the inner space of the outer tube.
Figure 6 illustrates a front cross-sectional view of the distal end of the skirt of the outer and inner tubes in the situation of Figure 5;
Figure 7 illustrates a longitudinal cross-sectional view of a conical portion inserted through the distal ends of the outer and inner tubes.
Figure 8 illustrates a front cross-sectional view of the distal end of the skirt of the outer and inner tubes with the conical portion of Figure 7 removed.
Figure 9 illustrates a front cross-sectional view of a tubular container formed of an outer tube and an inner vessel.
Figure 10 illustrates an enlarged view of the one-way valve arranged in the head of the outer tube and the head of the outer tube communicating with the shoulder of the inner vessel, in particular the intermediate cavity between the two tubes.
Figure 11 illustrates a front cross-sectional view of a tubular container sealed at the distal end and receiving the product therein.
Figure 12 illustrates an external perspective view of a tubular container in the situation of Figure 11;
Figure 13 illustrates a front cross-sectional view of the tubular container of Figure 11 in the situation where two opposing forces are applied to compress the container to remove the product from the interior.
Fig. 14 is a front cross-sectional view of the tubular container of Fig. 11 illustrating a subsequent situation in which the outer tube is restored to its undeformed shape with the inner tube deformed without further application of force;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular container made of a flexible material for a housing such as cosmetics, foods, medicines and the like, and a method for manufacturing the flexible tubular container. Tubular containers of this type are characterized in that they include a body or hollow skirt intended to contain a product (e.g., a cosmetic cream) and a head disposed at one end of the skirt to permit discharge or administration of the product. The head can be fitted with a product discharge neck, cap, dosing device, and the like. The manufacturer of this type of tubular container generally supplies the tubular container to the seller (e.g., the seller of the cosmetic product) with the head of the container closed, capped, sealed and wholly closed and with the opposite end of the skirt open . The merchandiser sells the product to the molten container through the open end of the skirt and then seals the end of the skirt so that the tubular container and the product contained therein are ready for sale to the general public.

Figure 9 illustrates an embodiment of a tubular container 1 made of a flexible material according to the present invention. The tubular container 1 includes a skirt 2 and a head 3, similar to other flexible tubular containers known in the art. The skirt 2 is a long, hollow, selectively cylindrical body disposed along the central longitudinal axis 4 and having a proximal end 5 and a distal end 6. The head 3 is disposed at the proximal end 5 of the skirt 2 and provides a lid at the proximal end 5. The head 3 of the tubular container may comprise a coupling system for attaching additional components, a perforable partial plug, means for engaging a closed cap of a different shape, a dosing cap, a dosing pump, an applicator, a non-drip system, And the like.

9, the tubular container 1 of the present invention includes an outer tube 10 and an inner vessel 30 accommodated inside the outer tube 10. As shown in Fig.

The outer tube 10, shown exclusively in FIG. 1, includes a skirt 11 and a head 12. The skirt 11 is a long, hollow, selectively cylindrical body disposed about the central longitudinal axis 13. [ The skirt 11 has an internal space 14 and an internal diameter d1 and has a proximal end 15 and a distal end 16. The head 12 is disposed at the proximal end 15 of the skirt 11 and closes the outer tube 10 while permitting the administration of the product from within the tubular container 1. In various embodiments of the present invention, the head may have a different design or configuration depending on the application or use of the tubular container (1). For example, the head may have a simple exit orifice and an external thread for engagement of the threaded cap. In other embodiments, the head may have a closed system, such as a cap, dosing pump, etc., coupled to the head. In this embodiment, the head 12 includes a generally tubular platform 18 extending from the shoulder 17, a generally cylindrical platform 18 and a platform 18 extending from the threaded cap, pump, applicator or other component or mechanism (Not shown). The threaded neck 19 terminates in the transverse wall 20 provided with the orifice 21. The head 12 defines an internal space 22 extending from the internal space 14 of the skirt 11 to the orifice 21 of the transverse wall 20 in this embodiment.

Optionally, a one-way valve 23 may be disposed in the orifice 21 of the transverse wall 20, which allows the product to be removed from the inside of the tube to the outside and the product and air from the outside to the inside of the tube It is a type that prevents it from being returned. For example, the one-way valve 23 shown in the figure includes a sphere 23a that is sealed to the conical seat 23b, and the sphere 23a is free to move in the axial direction, 13 and 14), when the pressure is released and a depression is present in the interior (as will be described with reference to FIGS. 13 and 14), from the outside to the inner space of the tube 14, and 22, respectively.

The outer tube 10 includes at least one orifice 24 formed in the skirt 11 of the outer tube 10 and / or the head 12 to define an outer surface of the outer tube 10, And the inner space 14, 22 of the outer tube 10, as shown in Fig. For example, in this embodiment, the orifice 24 is provided in the platform 18 of the head 12 of the outer tube 10 to communicate the inner spaces 14, 22 with an outer space (not shown) . Way valve 25 can be received within the orifice 24 and the function of the one way valve 25 is to allow air to flow from the interior spaces 14 and 22 through the orifice 24, So that air can be sucked into the inner space 14, 22 from the outside of the outer tube 10 through the orifice 24 while preventing the outer tube 10 from passing through. For example, as shown in the enlarged view of FIG. 10, the one-way valve 25 of the present embodiment is formed as a plug to be inserted into the orifice 24 and to which the flexible conical closure 26 is mounted, The distal end (lower end in the figure) is closed when the air pressure outside the tube is greater than the air pressure inside the tube and closed when the air pressure inside the tube is greater than the air pressure outside the tube. The orifice 24 and one-way valve 25 of the present embodiment are positioned axially, i.e., in the direction of the central longitudinal axis 13, and in the region of the platform 18 adjacent the shoulder 17, as shown in FIG. do.

The outer tube 10 may be decorated using techniques such as offset, flexography, silkscreen printing, stamping, self-adhesive labels, or in-mold labeling (IML).

As shown in FIG. 3, the inner casing 30 includes a skirt 31 and a shoulder 32. The skirt 31 is an elongated, hollow, selectively cylindrical body disposed along the central longitudinal axis 33 and having an interior space 34 therein. The skirt 31 of the inner vessel 30 further provides a proximal end 35 and a distal end 36 and an outer diameter d2 and an outer diameter d2 is preferably provided to the skirt 11 of the outer tube 10 (D1). The shoulder 32 of the inner container 30 is formed as a wall that is disposed at the proximal end 35 of the skirt 31 and partially closes the proximal end of the skirt 31 and ends at the edge 38. The shoulder 32 is flexible and has an internal space 39. Again, the edge 38 defines an orifice 37 that communicates the interior space 39 with the exterior of the inner vessel 30. Preferably, the wall forming the shoulder 32 is substantially frusto-conical, and the edge 38 and the hole 37 are concentric, and the center of the edge 38 and the center of the edge 38 are aligned with the central longitudinal axis of the inner vessel 30 33). In certain embodiments, the shoulder 32 may have a constant thickness. In another embodiment, such as that disclosed herein, the edge 38 has a greater thickness than the rest of the shoulder 32. It is also contemplated that the shoulder 32 includes at least one notch or region having a reduced thickness (not shown), such as the shape of a ring disposed about the central longitudinal axis 33, do.

As described above, the inner vessel 30 is arranged inside the outer tube 10, that is, inside the inner space 14 of the skirt 11 and a part of the inner space 22 of the head 12 of the outer tube 10 . 9, the shoulder 32 of the inner container 30 contacts the head 12 of the outer tube 10 over the entire circumference of the shoulder 32, And has a fluid-tight sealability by the sealed joint 40 formed between the head 12 and the head 12. Preferably, the sealed joint 40 between the shoulder 32 and the head 12 consists of a welded joint. The sealed assembly 40 prevents passage of fluid between the edge 38 of the shoulder 32 of the inner vessel 30 and the head 12 of the outer tube 10. The passage of the fluid is prevented throughout the sealed joint 40 extending 360 degrees around the central longitudinal axis 4 of the tubular container 1. [

As shown, the sealed assembly 40 has a radially intermediate region of the head 12 of the outer tube 10 that is radially closer to the central longitudinal axis 4 than the skirt 31 of the inner vessel 30, More specifically on the edge 27 of the platform 18 adjacent to the interior space 22. [ In a particular embodiment, the edge 27 of the head 12 of the outer tube 10 may have a seat or protrusion extending toward the inner space 22, not shown, the function of which will be described below.

Since the outer diameter d2 of the skirt 31 of the inner vessel 30 is slightly smaller than the inner diameter d1 of the skirt 11 of the outer tube 10 as described above, A gap is formed between the skirt 11 and the skirt 31 of the inner container 30. [ 7 and 8, the skirt 31 of the inner container 30 is connected to the outer surface of the skirt 11 of the outer container 10, It is possible to have a sufficient deformation capacity to adjust the inner diameter d1 of the screw shaft.

The outer tube 10 and the distal ends 16 and 36 of the inner vessel 30 are disposed at the distal end 6 of the skirt 2 of the tubular container 1. The skirt 31 of the inner container 30 includes an expanded region 41 at the distal end 36 of the skirt 31, as shown in the enlarged view of FIG. The length h2 of the expanded region 41 is preferably equal to the length of the skirt 11 of the outer tube 10 around the center longitudinal axis 4 of the tubular container 1, Adjacent to the distal end (16) of the body (11).

In certain embodiments, the distal ends 16, 36 of the outer tube 10 and the skirts 11, 31 of the inner container 30 are welded or attached to one another in a contact area having a length h2. The welding or attachment may be entirely circumferential about the central longitudinal axis 4 or may be intermittent. The weld or attachment may span all or part of the length h2. The purpose of welding or attachment is twofold. The initial function is that once the container has been filled with product the welding or attachment is carried out such that the distal ends 16 and 36 of the skirts 11 and 31 of the outer tube 10 and the inner container 30 are spaced from the distal end 6 of the tubular container 1 It can take a considerable amount of time until the product is filled and the distal end 6 is sealed from the time of manufacturing the tubular container 1 of Fig. 9 and the tubular container 1 May be subjected to transportation, storage, handling, etc., which may cause undesirable mechanical action on the tubular container (1). Welding or attachment is carried out between the inner vessel 30 and the outer tube 10 during the final sealing of the distal end 6 of the tubular container 1 while the contact along the length h2 is maintained despite this potential mechanical action Thereby ensuring adhesion. In a particular case where welding or attachment follows the entire circumference, the second function of welding or attachment is that the inner wall of the distal end 16 of the skirt 11 of the outer tube 10 is located at the distal end of the skirt 31 of the inner vessel 30 (36). In this way, when the container is filled with the product, when the end portion 6 of the tubular container 1 is sealed, the product seller is supplied with the outer tube 10 in a pre-welded state, Should be concerned about. From the point of view of the product seller who needs to seal the container 6 with the filler end, this solution contributes to the tubular container 1 behaving like a single-layer tube, Which greatly simplifies the sealing of the distal end 6 because it introduces a nozzle with a very low tolerance to the wall.

As shown in Fig. 8, the intermediate cavity 7 described above is partitioned over the extended region 41. As shown in Fig. 8 and 9, the intermediate cavity 7 is defined by the head 12 of the outer tube 10, the shoulder 32 of the inner vessel 30, and the outer tube 10, And the skirts 11 and 31 of the base 30 are formed.

The outer tube 10 and the inner vessel 30 are configured such that the distal end 16 of the skirt 11 of the outer tube 10 is positioned within the inner vessel 30 (H1) from the distal end portion 36 of the skirt 31 of the lower portion of the skirt 31. As shown in Fig.

An example of a method of manufacturing a tubular container according to the present invention for manufacturing the previous tubular container 1 will be described below. Next, in order to explain the advantageous effect of the present invention, the method of using the tubular container 1 by the product seller and the end user will be described in detail.

1 to 10 show a manufacturing procedure of a tubular container 1 according to an example of an embodiment of manufacture according to the present invention.

In the initial stage of the procedure, the outer tube 10 described above with the skirt 11 and the head 12 shown in Fig. 1 is manufactured. The outer tube 10 may be manufactured in one or more steps by any conventional technique known in the art of flexible tubular container manufacturing. For example, the outer tube 10 can be manufactured by extrusion of the skirt 11 and over-injection of the following head 12. In an alternative embodiment, the outer tube 10 may be manufactured through injection molding of the skirt 11 and subsequent over-injection molding of the head 12 into the skirt 11. In another example, the entire outer tube 10 may be manufactured by injection molding the skirt 11 and the head 12 together. The outer tube 10 may be made from a formulation comprising one or more plastic materials such as polypropylene, polyethylene, copolymers, and the like. The manufacture of the outer tube 10 may include decoration using techniques such as offset, flexography, silk screen printing, stamping, self-adhesive labels or in-mold labeling (IML).

An inner container 30 having a skirt 31 and a shoulder 32 is fabricated at a different initial stage of the procedure, which may be performed before, after, or simultaneously with the previous step. The skirt 31 and the shoulder 32 may be made of plastic, metal or a combination thereof. The skirt 31 and the shoulder 32 can be made together or alternatively can be manufactured separately as illustrated in Figs. 2 and 3 and then joined together. More specifically, for example, the skirt 31 may be formed from a plastic film (e.g., polyethylene), a metal-plastic composite film (e.g., an inner layer of polyethylene or polypropylene or an outer layer of an aluminum layer with an adhesive needed to form a bond between the outer coating and the layer ), Plastic composite films (e. G., EVOH layers with an inner layer of polyethylene or polypropylene and / or an outer coating, also using necessary adhesives) or by other plastic deformation techniques such as extrusion or injection. When a film is used, the film is deformed or bent until a tubular shape, for example, a cylindrical shape is obtained. The opposing longitudinal edges of the film are then welded or sealed to obtain a tubular sleeve. Welding is performed by generating heat in the welding area. The heat melts the polymers of opposite longitudinal edges and bonds them together. This manufacturing method is known and used, for example, in the manufacture of stacked tubes intended to accommodate toothpaste. Heat generation can be performed by using a conventional resistance system, or by using a high frequency magnetic field (in the case of using a metal-plastic film). Finally, the skirt 31 is obtained by cutting the tubular sleeve of a predetermined length. In this example, the shoulder 32 of the inner container 30 may be formed from a plastic film (e.g., polyethylene), a metal-plastic film (e.g., using an adhesive necessary to form a bond between the layers, And / or an aluminum layer with an outer coating), a plastic composite film (e.g. an EVOH layer with an inner layer of polyethylene or polypropylene and / or an outer coating, also using the necessary adhesive). A part of the film is cut and an orifice is formed in each part. The portion is then placed in the mold and pressure or stamping is applied to provide a three-dimensional cylindrical-conical shape in the shoulder as shown in the figure, wherein the orifice of each portion is the orifice 37 of the shoulder 32 . Although a truncated conical shoulder 32 is shown here, other embodiments are contemplated in which the shape of the shoulder 32 may vary.

Once the skirt 31 and shoulder 32 of the inner container 30 are obtained, the shoulder 32 is welded to the proximal end 35 of the skirt 31 and attached to each other, as shown in Fig. Welding can be performed, for example, by hot air, conduction, ultrasonic waves, and the like. Welding can be performed by a high frequency magnetic field when the skirt 31 and the shoulder 32 are both made of a combination of plastic and metal.

Once the inner vessel 30 is obtained, the inner vessel 30 is inserted inside the outer tube 10 as shown in Fig. More specifically, the shoulder 32 of the inner container 30 is inserted through the open distal end 16 of the skirt 11 of the outer tube 10, and the inner container 30 is inserted inside the outer tube 10 Is advanced along the inner space (14) of the tube (10). 5, the shoulder 32 of the inner vessel 30, and more particularly the edge 38 surrounding the orifice 37, is positioned on the inner wall of the head 12 of the outer tube 10, More specifically, the inner wall of the platform 18. [

The shoulder 32 of the inner vessel 30 is connected to the outer tube 10 by, for example, hot air, conducted or high frequency (when the shoulder 32 and / or the head 12 are made of a combination of plastic and metal) To the head 12 of the apparatus. As described above, the welding is carried out in such a manner that the edge 38 of the shoulder 32 of the inner vessel 30 and the head 38 of the outer tube 10 (the outer tube 10 and the inner vessel 30) ) Of the inner wall of the housing (40).

6, once the inner vessel 30 is inserted and fixed in the outer tube 10, the distal end portion of the skirt 11, 31 at the opposite end of the outer tube 10 and the inner vessel 30 16, and 36 are radially separated from each other by a gap or a distance r1. This distance r1 is substantially equal to half of the difference 30 between the inner diameter d1 of the skirt 11 of the outer tube 10 and the outer diameter d2 of the skirt 31 of the inner container 30. The distal end 16 of the skirt 11 of the outer tube 10 can also protrude with a length h1 relative to the distal end 36 of the skirt 31 of the inner container 30 as shown in the figure . However, an alternative embodiment is contemplated in which the distal end 16 of the skirt 11 of the outer tube 10 does not protrude from the distal end 36 of the skirt 31, i.e., the length h1 is zero.

7 and 8, an additional optional step of expanding the distal end 36 of the inner vessel 30 is performed. At this stage the inner vessel 30 and optionally the outer tube 10 are positioned such that the outer diameter d2 of the open distal end 36 of the skirt 31 of the inner vessel 30 is smaller than the outer diameter d2 of the skirt 11 of the outer tube 10. [ Of the skirt 31 of the inner tube 30 is substantially equal to the inner diameter d1 of the outer tube 10 until the distal end 36 of the skirt 31 of the inner vessel 30 is seated in the distal end 16 of the skirt 11 of the outer tube 10 Receive. The deformation can be performed, for example, by axially inserting the conical portion 50 or the reduced diameter portion of the open distal end 36 of the skirt 31 of the inner container 30 to a predetermined depth. In certain embodiments, heat may be applied, along with the deformation, to cause the distal ends 16, 36 to melt, and in other embodiments, the deformation may be performed without applying heat so that the distal ends 16, . When the conical portion 50 deforms the distal end portion 36 of the skirt 31 of the inner container 30, the conical portion 50 is removed. In some embodiments, such as the embodiment shown herein, the distal end 16 of the skirt 11 of the outer tube 10 is not deformed. In another embodiment, the distal end 16 of the skirt 11 of the outer tube 10 may be deformed once the prong portion 50 is removed to restore its original cylindrical shape. In another embodiment, the distal end 16 of the skirt 11 of the outer tube 10 is deformed once the conical portion 50 is removed and does not recover its original cylindrical shape. 8, the distal end portion 36 of the predetermined length H2 of the skirt 31 of the inner container 30 is removed from the skirt portion of the outer tube 10, (11). In some embodiments, the ends 16, 36 are welded or adhered along all or a portion of the perimeter of the walls of the distal ends 16, 36 of the skirts 11, 31, But are adhered to, along with some or all of the circumference.

Once the distal ends 16,36 of the skirt 11,31 of the outer tube 10 and the inner vessel 30 are adjacent by deformation and selectively attached together by welding or attachment along some or all of the perimeter , The tubular container 1 of Fig. 9 is obtained. This tubular container (1) is characterized by having an outer tube (10) which is visible and touchable by the consumer and an inner container (30) intended to contact the product to be stored in the tubular container (1).

Finally, if not, a lid (not shown) or any other optional additional element is added to the tubular container 1. The tubular container 1 is then delivered to a product seller, for example a cosmetic product seller, to allow the tubular container 1 to be charged.

The tubular container 1 according to the present invention is made up of two tubes (the outer tube 10 and the inner vessel 30), but has the appearance of a conventional tubular container and, more importantly, And can be filled and sealed in the same manner as the tubular container of FIG. The head 12 of the outer tube 10 forms the head 2 of the tubular container 1 while the skirts 11 and 31 form the skirt 2 of the tubular container 1. [ Since the distal ends 16 and 36 of the skirts 11 and 31 of the outer tube 10 and the inner vessel 30 are adjacent to and in contact with each other, the distal end 6 of the skirt 2 of the tubular container 10 , An opening is provided which communicates with a single inner space (a single inner space is the inner space 34 of the inner container 30) of the tubular container 1 to allow the tubular container 1 to be filled in a conventional manner.

A product seller (e.g., a cosmetic seller) may fill the tubular container 1 with a product 51 (e.g., shown in Figures 11, 13 and 14) such as a cream to allow the product 51 to open the tubular container 1 39 into the inner space 34, 39 of the inner vessel 30 through the distal end portion 6. [ Next, as shown in Fig. 11, the distal end 6 of the skirt 2 of the tubular container 1 is welded, for example, by applying heat, high frequency, adhesive or the like to the skirt 2; Thereafter, pressure is applied to the distal end 6 of the skirt 2 to flatten the distal end 6 and seal it with a linear seal, as shown in Fig. More specifically, the seal extends along some or all of the length h2 of the extended region 41 of the distal end 36 of the skirt 31 of the inner container 30, and when the extra length H1 is present Is performed along the band of the distal end 6 having a height H3 extending along the extra length h1 of the skirt 11 of the outer tube 10. [ This allows intimate and durable bonding between the two skirts 11 and 31 over the entire circumference of the skirts 11 and 31 along the extended area 41 and, Thereby ensuring sealing of the end of the skirt 11 of the outer tube 10 to itself along the extra length h1. Once welded, the product 51 is received in the inner space of the tubular container 1, more specifically in the inner spaces 34 and 39 of the inner tube 30, as shown in Fig.

13 illustrates a process of extracting the product 51 from the interior of the tubular container 1 by the user. As illustrated, when a user desires to dispense a portion of the product 51 from within the tubular container 1, the user normally applies two opposing forces F with the help of the user's fingers. The force F causes the outer tube 10 to collapse toward the interior of the skirt 11 and increases the pressure in the intermediate cavity 7 between the outer tube 10 and the inner vessel 30. [ In this embodiment, the one-way valve 25 of the outer tube 10 prevents the release of air from the intermediate cavity 7. The collapse of the skirt 11 and the increase in the pressure of the intermediate cavity 7 thus allow the inner container 30, and more particularly the skirt 31 of the inner container 30 to be compressed. One or more orifices of the outer tube 10 in communication with the intermediate cavity 7 and preferably without a valve may allow air to escape during compression of the outer tube 10, Allowing the skirt 31 of the inner container 30 to be compressed by allowing it to contact the container 30 and pushing the inner container. The edge 38 of the shoulder 32 of the inner container 30 remains welded to the head 12 of the outer tube 10 when the skirt 31 of the inner container 30 is compressed. If the shoulder 32 of the inner container 30 includes one or more notches or areas having a reduced thickness, these notches may be formed by the shoulders 32 of the outer tube 10 when the skirt 31 is compressed, Causing the edge 38 of the shoulder 32 to bend down without bending to pull the handle 12 excessively.

The compression of the skirt 31 of the inner container 30 increases the pressure in the inner spaces 34 and 39 of the inner container 30. [ When the pressure increase is sufficient, the product 51 is discharged from the orifice 37 in the shoulder 32 of the inner vessel 30, the inner space 22 of the head 12 of the outer tube 10, Directional valve 23 in the head 12. As shown in Fig. When the user stops applying the force F, the skirt 31 of the elastic outer tube 30, which tends to recover the original undeformed shape, begins to open outward, . This vacuum allows air to flow from the outside through the one-way valve 25 or, alternatively, through at least one valveless orifice of the outer tube 10 to communicate with the intermediate cavity 7. Inhalation of the air in the intermediate cavity 7 helps the skirt 11 of the outer tube 10 recover its original shape as shown in Fig. The one way valve 23 of the head 12 of the outer tube 10 allows the product 51 or the outside air to flow toward the inner space 22 of the head 12 of the outer tube 10, To the side of the inner space 34, 39 of the housing. As a result, the inner container 30 is held in the deformed position as shown in Fig. The fact that a sealed combination between the shoulder 32 of the inner vessel 30 and the head 12 of the outer tube 10 is formed in the middle region of the head 12 of the outer tube 10 is a result of the deformation of the inner vessel 30 prevent the undeformed outer tube 10 from being pulled, so that both sides can freely hold the deformed position and the unmodified position.

That is, the above-mentioned tubular container 1 can be completely restored to its appearance after use (by restoring the unstable appearance after pressurization as shown in Figs. 12 and 14) The product 51 is isolated from the outside air to improve maintenance and prolong its service life).

Repeated use of the tubular container 1 will produce increased compression of the inner container 30 while the outer tube 10 is recovered as described. Due to the fact that the shoulder 32 is bonded only to the head 12 of the outer tube 10 by a sealed peripheral band (sealed combination 40) with a very large deformability, the shoulder 32 is deformed to be substantially free It folds inward, leading to high levels of collapse and recovery. When the edge 27 of the head 12 protrudes or has a seat in which the sealed assembly 40 is located, the shoulder 32, together with the skirt 31 of the inner container 30, The collapse of the inner container 30 and the recovery speed of the tubular container 1 can be further increased.

As described above, in an alternate embodiment, the intermediate cavity 7 may include, for example, one or more permanent orifices of the outer tube 10 within the skirt 11 or shoulder 32 of the outer tube 10, Permanently open orifice). This provides a low cost tubular container because there is no need for assembly because there is no one way valve 25. The number and / or dimensions of the orifices should provide an effective and stable balance of pressure loss through the intermediate chamber and the rate of recovery of the original shape of the outer tube.

The outer tube 10 and the inner vessel 10 are all made of a plastic material, a plastic composite material, a plastic composite material, and the like, as far as the material used to manufacture the outer tube 10 and the inner vessel 30 of the tubular container 1, Metal-plastic composite materials, fabric materials of one or more layers, paper of one or more layers, combinations thereof, and the like. In short, the outer tube 10 and the inner vessel 30 can be made of any material or formulation applicable to a tube of flexible material such as polypropylene, polyethylene, polyolefin copolymer, aluminum laminate composite, EVOH laminate composite, have. However, in the preferred embodiment of the present invention, the outer tube 10 is made of a plastic formulation and modified using an injection molding technique, while the inner container 30 is preferably a plastic or metal-plastic formulation. More specifically, it is made of plastic or metal-plastic laminated composite material modified through molding technology.

Preferably, the material or materials from which the inner container 30 is made meet one or more of impermeability requirements, ESCR immunity requirements, peel prevention requirements, food contact requirements, pharmacopoeial requirements, flexibility requirements, deformability requirements and the like. This allows the inner vessel 30 to perform the functions described herein. The material or materials from which the outer tube 10 is made then meet one or more other requirements such as processability requirements, surface appearance requirements, printability requirements (printing capability), mechanical stiffness requirements (mechanical stiffness above threshold), and the like; In addition, the material or materials from which the outer tube 10 is made may be made of a recycled material.

Preferably, the material or materials from which the outer tube 10 is made do not meet the requirements of the material or materials from which the inner container 30 is made. That is, it is preferable that the outer tube 10 does not satisfy the requirement of the inner container 30. For example, the material of outer tube 10 does not meet the impermeability, ESCR resistance, weldability, peel resistance, food contact, softness, flexibility and / or deformability requirements that the material of inner container 30 satisfies .

Preferably, the material or materials from which the inner vessel 30 is made do not meet the requirements of the materials or materials from which the outer tube 10 is made. That is, it is preferable that the inner vessel 30 does not satisfy the requirement of the outer tube 10. For example, it is preferable that the material of the inner vessel 30 does not satisfy the workability, surface appearance, printability, mechanical rigidity and / or weldability requirements that the material of the outer tube 10 fulfills.

Separating the functional requirements into two components, the inner vessel 30 and the outer tube 10, does not mean that any of these components must meet all of the requirements simultaneously, thus facilitating the material selection of each tube. This simplifies the manufacture of the final tubular container 1 and improves the quality (quality is understood as the ability of the tubular container 1 to meet the functional requirements during its useful life).

In summary, the problem of incomplete restoration of a dual tube airless container is solved by using an inner container with a skirt and shoulder in the form of a wall with reduced diameter, which is comparable to deformation of the head of the inner tube known in the prior art Providing greater deformability.

On the other hand, the problem of achieving proper sealing between the distal end of the outer tube and the inner vessel disposed within the outer tube is that the distal end of the inner vessel is expanded or flared until abutting adjacent ends, Thereby forming an intimate bond between the distal ends along the entire circumference thereof. It is contemplated that such a solution may be used for tubular containers other than those illustrated herein, e.g., tubular containers that include both an outer tube and an inner container, each with a respective skirt and a respective head.

In addition, the problem of the complexity of material selection is solved through the formation of tubular containers with hidden inner tubes and visible outer tubes that are hidden and kept in contact with the product to be stored, wherein each of these tubes meets different functional requirements And most importantly the outer tube does not meet the requirements of the inner vessel. It is contemplated that such a solution may be used for tubular containers other than those illustrated herein, e.g., tubular containers that include both an outer tube and an inner container, each with a respective skirt and a respective head.

Claims (59)

A tubular container (1) of flexible material,
An outer tube (10) comprising a skirt (11) and a head (12), said skirt (11) having a proximal end (15) and a distal end (16) Wherein the skirt 11 and the head 12 extend from the proximal end 15 of the head 12 through an orifice 21 in the head 12, 14, 22) of the outer tube (10)
An inner container (30) having a skirt (31) and a flexible shoulder (32), said skirt (31) having a proximal end (35) and a distal end (16) , Said skirt (31) and said shoulder (32) defining an inner space (34, 39), said shoulder (32) extending from a proximal end (35) (30) that terminates at an edge (38) defining an orifice (37)
The inner container 30 is arranged in the inner spaces 14 and 22 of the outer tube 10 and the shoulder 32 of the inner container 30 is fixed to the head 12 of the outer tube 10. [ And an orifice (21) of a head (12) of the outer tube (10) communicates with an inner space (34, 39) of the inner vessel (30).
The method according to claim 1,
The tubular container can discharge fluid from the inner spaces 34 and 39 of the inner vessel 30 to the outside of the outer tube 10 and can discharge the fluid from the outside of the outer tube 10 Way valve (23) for preventing the inflow of air into the at least one one-way valve (34, 39).
3. The method of claim 2,
Wherein the one-way valve (23) is disposed inside the hole (21) of the head (12) of the outer tube (10).
The method according to claim 1,
Characterized in that the skirt (31) of the inner container (30) does not protrude from the skirt (11) of the outer tube (10).
The method according to claim 1,
Characterized in that the shoulder (32) of the inner container (30) is fixed to the head (12) of the outer tube (10) by an edge (38) of the shoulder (32).
The method according to claim 1,
The shoulder 32 is fixed to the head 12 of the outer tube 10 through a sealing union 40 which extends continuously along the entire periphery of the central longitudinal axis 4 of the tubular container 1 Characterized by a tubular container (1).
The method according to claim 1,
Characterized in that the intermediate cavity (7) is defined between the outer tube (10) and the inner vessel (30).
8. The method of claim 7,
The shoulder 32 is fixed to the head 12 of the outer tube 10 through a sealing union 40 which extends continuously along the entire periphery of the central longitudinal axis 4 of the tubular container 1 Characterized by a tubular container (1).
9. The method of claim 8,
Characterized in that the intermediate cavity (7) is radially external to the sealing union (40) with respect to the central longitudinal axis (4).
10. The method of claim 9,
The shoulder 32 of the inner vessel 30 is coupled only to the head 12 of the outer tube 10 along the hermetic union 40 so that the remainder of the shoulder 32 Is radially external and remote from the outer tube (10).
9. The method of claim 8,
The intermediate cavity 7 extends from the sealing union 40 over the entire periphery of the skirt 31 and a shoulder 32 about the central longitudinal axis 4 of the tubular container 1, (36) of the tubular container (1).
12. The method of claim 11,
Characterized in that the distal end (36) of the skirt (31) of the inner container (30) is in contact with the distal end (16) of the skirt (11) of the outer tube (10).
10. The method of claim 9,
The distal end portion 36 of the skirt 31 of the inner container 30 is in contact with the distal end portion 16 of the skirt 11 of the outer tube 10 over the entire periphery around the central longitudinal axis 4 (1).
11. The method of claim 10,
Characterized in that the distal end (36) of the skirt (31) of the inner container (30) is fixed to the distal end (16) of the skirt (11) of the outer tube (10) One).
8. The method of claim 7,
Characterized in that said outer tube (10) comprises at least one orifice (24) for communicating said intermediate cavity (7) with the exterior of said outer tube (10).
16. The method of claim 15,
A one-way valve 25 is disposed in the orifice 24 and the one-way valve 25 allows air to flow from the outside of the outer tube 10 into the middle cavity 7, To prevent the outflow of air from the outer tube (10) to the outside of the outer tube (10).
17. The method of claim 16,
Wherein the intermediate cavity (7), the orifice (24) and the one-way valve (25) are radially external to the central longitudinal axis (4) of the closed union (40).
1. A method of making a tubular container (1) of flexible material,
Obtaining an outer tube (10) having a skirt (11) and a head (12), said skirt (11) having a proximal end (15) and a distal end (16) Which extends from the proximal end 15 of the skirt 11 and which allows the skirt 11 and the head 12 to communicate with the outside of the outer tube 10 through an orifice 21 in the head 12. [ An internal space (14, 22)
Obtaining an inner container (30) with a skirt (31) and a flexible shoulder (32) wherein the skirt (31) has a proximal end (35) and a distal end (16) The skirt 31 and the shoulder 32 defining an interior space 34 and 39 and the shoulder 32 extending from the proximal end 35 of the interior space 34, 39 ending at an edge (38) defining an orifice (37) communicating with the orifice (37)
Inserting the inner container (30) into the inner space (14, 22) of the outer tube (10)
The shoulder portion 32 of the inner vessel 30 is fixed to the head 12 of the outer tube 10 so that the orifice 21 of the head 12 of the outer tube 10 contacts the inner vessel 30, To communicate with the inner spaces (34, 39)
19. The method of claim 18,
The step of acquiring the outer tube 10 includes obtaining the skirt 11 of the outer tube 10 by extrusion and forming the outer tube 10 through the over-injection molding on the skirt 11 of the outer tube 10. [ And forming a head (12) of the tube (10).
19. The method of claim 18,
The step of acquiring the outer tube 10 includes obtaining the skirt 11 of the outer tube 10 by injection molding and the step of forming the outer tube 10 by overmolding molding on the skirt 11 of the outer tube 10. [ And forming a head (12) of the outer tube (10).
19. The method of claim 18,
Wherein acquiring the inner vessel (30) comprises acquiring the outer tube (10) through joint injection molding of the skirt (11) of the outer tube (10) and the head (12) Way.
19. The method of claim 18,
The step of acquiring the inner container 30 includes obtaining the skirt 30 of the inner container 30 by extrusion and the step of obtaining the inner container 30 through the overinjection molding on the skirt 31 of the inner container 30. [ And forming a shoulder (32) of the container (30).
19. The method of claim 18,
The step of acquiring the inner container 30 includes obtaining the skirt 30 of the inner container 30 by injection molding and the steps of obtaining the inner container 30 through the over-injection molding on the skirt 31 of the inner container 30. [ And forming a shoulder (32) of the inner container (30).
19. The method of claim 18,
Wherein the step of acquiring the inner vessel (30) comprises acquiring the inner vessel (30) through a joint injection molding of the skirt (31) and the shoulder (32) of the inner vessel (30) Way.
19. The method of claim 18,
The step of acquiring the inner vessel (30) comprises obtaining a first film of a plastic or metal-plastic composite material, deforming the first film until a tubular shape is obtained, Sealing the adjacent edges of the shape to obtain a skirt (31) of the inner container (30), obtaining a second film of plastic or metal-plastic composite material, forming an orifice in the second film, And the shoulder 32 of the inner container 30 is fixed to the skirt 31 of the inner container 30 by stamping a second film provided thereon to form the shoulder 32 of the inner container 30 ≪ / RTI >
A tubular container (1) of flexible material,
An outer tube (10) comprising a skirt (11) and a head (12), said skirt (11) having a proximal end (15) and a distal end (16) Wherein the skirt 11 and the head 12 extend from the proximal end 15 of the head 12 through an orifice 21 in the head 12, 14, 22) of the outer tube (10)
(30) including a skirt (31) having a proximal end (35) and a distal end (16)
The inner container 30 is arranged in the inner spaces 14 and 22 of the outer tube 10 and the distal end 36 of the skirt 31 of the inner container 30 is flared, A tubular container (1) in contact with a distal end (16) of a skirt (11) of a tube (10).
27. The method of claim 26,
The distal end 36 of the skirt 31 of the inner container 30 is flared and is attached to the skirt 31 of the outer tube 10 along the entire circumference about the central longitudinal axis 4 of the tubular container 1. [ 11. The tubular container (1) according to any one of the preceding claims, characterized in that the tubular container (1) is in contact with the distal end (16)
27. The method of claim 26,
Characterized in that the distal end (36) of the skirt (31) of the inner container (30) is arranged flush with the distal end (16) of the skirt (11) of the outer tube (10).
27. The method of claim 26,
Characterized in that the length h1 of the distal end portion 16 of the skirt 11 of the outer tube 10 protrudes from the distal end portion 36 of the skirt 31 of the inner container 30. [ .
27. The method of claim 26,
The distal end 36 of the skirt 31 of the inner vessel 30 is positioned at least partially around the central longitudinal axis 4 of the tubular container 1 at the distal end of the skirt 11 of the outer tube 10 16). ≪ / RTI >
31. The method of claim 30,
Characterized in that the distal end (36) of the skirt (31) of the inner container (30) is fixed to the distal end (16) of the skirt (11) of the outer tube (10) by welding, adhesive, Tubular containers (1).
1. A method of making a tubular container (1) of flexible material,
Obtaining an outer tube (10) having a skirt (11) and a head (12), said skirt (11) having a proximal end (15) and a distal end (16) Which extends from the proximal end 15 of the skirt 11 and which allows the skirt 11 and the head 12 to communicate with the outside of the outer tube 10 through an orifice 21 in the head 12. [ An internal space (14, 22)
Obtaining an internal container (30) including a skirt (31), said skirt (31) comprising an acquisition step having a proximal end (35) and a distal end (16)
Inserting the inner vessel (30) into the inner space (14, 22) of the outer tube (10)
Flare the distal end portion (36) of the skirt (31) of the inner container (30) so that the distal end portion (36) of the skirt (31) of the inner container (30) And a distal end (16) of the skirt (11).
33. The method of claim 32,
The flare processing of the distal end 36 of the skirt 31 of the inner container 30 may include flaring the distal end 36 of the skirt 31 of the inner container 30 around the central longitudinal axis 4 of the tubular container 1 36) of the outer tube (10) is flared and the distal end (36) of the skirt (31) of the inner container (30) is flared and the skirt (16) < / RTI >
33. The method of claim 32,
The flare processing of the distal end portion 36 of the skirt 31 of the inner container 30 includes inserting the conical portion 50 into the distal end portion 36 of the skirt 31 of the inner container 30, And deforming the distal end (36) of the skirt (31) of the inner container (30) against the distal end (16) of the skirt (11) of the outer tube (10).
33. The method of claim 32,
The step of inserting the inner container 30 is performed when the distal end portion 36 of the skirt 31 of the inner container 30 is flush with the distal end portion 16 of the skirt 11 of the outer tube 10 And inserting the inner container (30) into the inner container (30).
33. The method of claim 32,
Wherein the step of inserting the inner container 30 is performed such that the length h1 of the distal end portion 16 of the skirt 11 of the outer tube 10 is smaller than the length h1 of the distal end portion 36 of the skirt 31 of the inner container 30 And inserting the inner container (30) until it protrudes.
33. The method of claim 32,
The distal end portion 36 of the skirt 31 of the inner container 30 is connected to the distal end portion of the skirt 11 of the outer tube 10 along at least a part of the periphery around the central longitudinal axis 4 of the tubular container 1. [ (16). ≪ / RTI >
39. The method of claim 37,
Wherein the step of securing the distal end (36) of the skirt (31) of the inner container (30) comprises welding, bonding, or a combination thereof.
33. The method of claim 32,
The step of obtaining the outer tube 10 may include obtaining the skirt 11 of the outer tube 10 by extrusion and forming the outer tube 10 by over-injection molding on the skirt 11 of the outer tube 10, And forming a head (12) of the outer tube (10).
33. The method of claim 32,
The step of obtaining the outer tube 10 may include obtaining a skirt 11 of the outer tube 10 by injection molding and a method of overmolding the outer tube 10 over the skirt 11, And forming a head (12) of the outer tube (10).
33. The method of claim 32,
Wherein acquiring the outer tube 10 comprises acquiring the outer tube 10 through a joint injection molding of the skirt 11 and the head 12 of the outer tube 10. [ Gt;
33. The method of claim 32,
Wherein acquiring the inner container (30) comprises obtaining a skirt (31) of the inner container (30) by extrusion.
33. The method of claim 32,
Wherein acquiring the inner container (30) comprises acquiring a skirt (31) of the inner container (30) by injection molding.
33. The method of claim 32,
The step of acquiring the internal vessel 30 may include obtaining a laminate of a plastic or metal-plastic composite material, deforming the laminate until a tubular shape is obtained, Sealing the adjacent edges of the shape, and obtaining a skirt (31) of the inner container (30).
A tubular container (1) of flexible material comprising an inner space for receiving a skirt (2), a head (3), and a product (51)
An outer tube (10) comprising a skirt (11) and a head (12), said skirt (11) having a proximal end (15) and a distal end (16) Wherein the skirt 11 and the head 12 extend from the proximal end 15 of the head 12 through an orifice 21 in the head 12, 14, 22) of the outer tube (10)
And at least a portion of the inner space of the tubular container (1) is provided and the holes (21) of the head (12) of the outer tube (10) And an inner vessel (30) having an inner space (34, 39) communicating therewith,
At least a portion of the inner vessel (30) is comprised of a first material or a first combination of materials configured to satisfy a first requirement,
Wherein at least a portion of the outer tube (10) comprises a second material or a second combination of materials not configured to satisfy the first requirement,
46. The method of claim 45,
Wherein said first requirement is an impermeable requirement.
46. The method of claim 45,
Wherein said first requirement is an ESCR resistance requirement.
46. The method of claim 45,
Wherein the first requirement is a peel prevention requirement.
46. The method of claim 45,
Wherein said first requirement is a food contact requirement.
46. The method of claim 45,
Characterized in that the first requirement is a drug delivery requirement.
46. The method of claim 45,
Characterized in that the first requirement is a flexible requirement.
46. The method of claim 45,
Wherein the first requirement is a deformability requirement.
46. The method of claim 45,
Characterized in that the second material or a second combination of materials is a reclaimed material.
46. The method of claim 45,
Wherein the second material or combination of materials is configured to satisfy a second requirement that is not satisfied by the first material or a first combination of materials.
55. The method of claim 54,
Wherein said second requirement is a processability requirement.
55. The method of claim 54,
Wherein said second requirement is a surface appearance requirement.
55. The method of claim 54,
Wherein said second requirement is a printability requirement.
55. The method of claim 54,
Wherein said second requirement is a mechanical stiffness requirement.
1. A method of making a tubular container (1) of flexible material comprising an inner space for receiving a skirt (2), a head (3), and a product (51)
Obtaining a first combination of a first material or material configured to satisfy a first requirement,
Obtaining an outer tube (10) with a skirt (11) and a head (12) using a first combination of said first material or material, said skirt (11) comprising a proximal end (15) and a distal end The head 12 extending from the proximal end 15 of the skirt 11 and the skirt 11 and the head 12 defining an orifice 21 in the head 12, (14, 22) that can communicate with the exterior of the outer tube (10)
Obtaining a second combination of a second material or material not configured to satisfy the first requirement,
Acquiring an inner vessel (30) comprising an inner space (34, 39) using a second combination of said second material or material,
Inserting the inner container 30 into the inner spaces 14 and 22 of the outer tube 10 so that the inner spaces 34 and 39 provide at least a portion of the inner space of the tubular container 1 And the inner space (34, 39) is in communication with the hole (21) of the head (12) of the outer tube (10)

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