TW201739438A - Tubular container with an outer tube and an inner container - Google Patents

Abstract

Tubular container (1) made of a flexible material, which comprises an outer tube (10) and an inner container (30) housed inside the outer tube (10) and intended to come into contact with the packaged product (51). A flexible shoulder (32) of the inner container (30) is secured to a head (12) of the outer tube (10), there remaining an intermediate cavity (7) between the outer tube (10) and the inner container (30). At least one orifice (24) communicates the intermediate cavity (7) with the exterior of the tubular container (1). The head (12) may include a one-way airless valve. The outer tube (10) may recover its shape whilst the inner container (30) remains compressed during the use of the tubular container (1). The outer tube (10) and the inner container (30) are preferably made out of materials that fulfil different requirements. The distal end (36) of the inner container (30) is preferably flared against 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 containing cosmetics, food, medicine, or the like, and more particularly, to a tubular container including an outer tube and an inner container, the inner container is installed Inside the outer tube.

Flexible plastic tubes are widely used in the cosmetics, pharmaceutical, or food sectors. A flexible plastic tube is characterized by a hollow body or skirt intended to hold a product (for example, a cosmetic cream) and a head placed at one end of the skirt and intended to allow for the dispensing or dispensing of the product. . The head can be coupled to a neck for providing an outlet, cap, dispensing mechanism, etc. for the product. When the tube is filled with a product, the end of the skirt opposite the head is sealed by heat sealing, usually by hot air, hot clamps, ultrasonic waves, and the like.

These flexible plastic tubes are obtained by various manufacturing methods, for example, extrusion, coextrusion, injection molding, and the like. Likewise, various methods are known for providing a flexible plastic tube with any informational or decorative element by directly on a flexible plastic tube or by incorporating a separate element (e.g., a label). For example, flexible plastic tubes can be used It is decorated as follows: lithography, flexography, silk screen, embossing, self-adhesive labels, and the like. In the process of injection molding, the technique known as In-Mould Labelling (IML) is a well-known technique used in the prior art to provide a tube having a label.

Despite the widespread market implementation, there are still unresolved specific problems in the manufacture of flexible plastic tubes.

For example, the first problem is that it is difficult to choose the material from which the tube is made, especially in the injection molding process. The materials used must have very specific characteristics and meet the requirements, for example, can be processed, exhibit appropriate weldability, impermeability, Environmental Stress Cracking Resistance (ESCR), and the like. When it comes to the food industry, materials must also meet stringent requirements for food contact safety, as the tube on the market must be in direct contact with the packaged product. In the cosmetics, food, and pharmaceutical fields, materials must meet specific suitability requirements, for example, non-toxic, global, and specific migration, as such tubes must frequently contact products that are to be ingested or applied to the body. Generally, these characteristics and satisfaction requirements are achieved through the selection and use of polymeric compounds and other components, particularly in the manufacture of tubular bodies by injection molding. However, obtaining polymeric compounds that meet these various requirements (including mechanical requirements, food contact requirements, non-toxic requirements, processability requirements, etc.) is extremely complicated and expensive. In addition, when a polymeric compound is used, it is troublesome to maintain and ensure the properties of the compound because of the relationship between the basic variables (fluidity, density, rigidity, etc.) of the polymer contained in the compound. For this reason, to be able to achieve peace It is extremely complicated to balance the polymer compounds that are successfully manufactured and used with all the properties required for the tube, especially when the tube is an injection molded tube. In addition, polymeric compounds that meet stringent food contact or non-toxic requirements must be obtained to directly exclude the large amount of polymer used to prepare the compounds. This further hinders the design of the polymeric compound.

The second problem relates to the type of pipe body known in the prior art, which is actually made of two pipe bodies, one in the other. The manner in which one tube is inside the other tube is often used to obtain an airless container, that is, to prevent air from entering the container of the container, in order to improve the packaged product (for example, cream, serum, vitamin C, etc. without additives) The preservation of products such as). This method is also commonly used to solve the effect of tube collapse during use. In this type of tubular container, the inner tube and the outer tube are coupled to a skirt and a head having an outer neck. The inner and outer tubes are joined by their outer neck. This approach is flawed in achieving a high regression rate (the ability to deliver all of the contents of the tube), which cannot be completely collapsed due to the high degree of rigidity of the inner tube head.

A third problem relates to the sealing of a double-tube tubular container, for example the tubular container or the dual-product container mentioned in the preceding paragraph (a tubular container made of an inner tube and an outer tube and containing two different products, wherein The outer tube has a head having a special configuration for the two output orifices of the two products so that the two products are simultaneously released and mixed together at the exact time of their application. To assemble the previously mentioned double tube container, the skirt of the inner tube and the skirt of the outer tube have a significant difference in diameter so that the inner tube can be assembled within the outer tube. This means that when the ends of the skirts are flat to achieve their joint seal, the inner tube A perfect seal is not achieved between the skirt and the skirt of the outer tube, and thus a seal failure may occur. More specifically, the seal in the central zone has four wall thicknesses with only two sides. When the jaw portions are compressed, the wall portions are welded under the correct pressure in the regions of the four wall portions, but the pressure in the region of the two wall portions is insufficient, thereby causing poor welding in this region. . Again, this slack hinders the introduction of the fusion nozzle, which must be adjusted very precisely within the tube.

The main object of the present invention is to provide a novel tubular container that addresses at least one of the above mentioned problems.

The object of the present invention is a tubular container made of a flexible material for containing cosmetics, food, medicine, or the like, and a method of manufacturing the flexible tubular container. The tubular container includes an outer tube and an inner container. The outer tube includes a skirt portion and a head portion, wherein the head portion generally includes a neck portion, a thread, and the like. The inner container is mated with a skirt, and in a preferred embodiment of the invention, a shoulder is mated at the proximal end of the skirt. The shoulder is an open cap, that is, an aperture having an aperture and thus does not completely close the proximal end of the skirt of the inner container. The shoulder is flexible or deformable, preferably exhibiting plastic deformation. The inner container is mounted within the outer tube, and the shoulder of the inner container is secured to the interior of the head of the outer tube, preferably in a sealed manner such that once the proximal end of the tubular container is Sealed, the shoulder of the inner container provides fluid tightness to the inner container. Therefore, the inner container does not have a typical tube head (having a neck, a thread, etc.) of a conventional flexible tube; instead, when it is welded to the outer tube, the inner container uses the neck and thread of the head of the outer tube. Wait for the contents to be released. In other words, the inner container shares or uses the neck of the head of the outer tube. Moreover, the shoulder preferably exhibits high deformability without damaging the shoulder to the head of the inner container. Moreover, the shoulder portion is preferably made of a laminated composite material (aluminum or the like) which is the same as or similar to the skirt of the inner container, exhibiting cost advantage and ultra-high deformability (the deformation is plastic, thus avoiding the shape Restore and ensure that the inner container is permanently collapsed).

A gap is defined between the inner container and the outer tube. Preferably, the tubular container is capable of restoring its original shape after use, or in other words, after pressing the tubular container to remove the product contained therein. On the other hand, the inner container is preferably kept deformed by a one-way valve that prevents air from returning to the inside of the inner container. Preferably, the one-way valve is placed in the head of the outer tube, placed in a cap fixed to the head of the outer tube, or placed in another component (eg, applicator or cartridge) )in. Moreover, the distal end of the inner container is preferably deformed and widened (or expanded), and the splicing succeeds and contacts the distal end of the outer tube. The outer tube and the inner container may be made of different materials such that the inner container intended to keep in contact with the packaged product satisfies the requirements associated with the function; while the outer tube that is kept visible to the outside does not need to satisfy the inner container Alternatively, the requirements related to the function of the outer tube are met, for example, carrying one or more decorative elements, labels, and the like.

A first advantage provided by at least some embodiments of the present invention, and in particular by embodiments in which the outer tube and the material of the inner container meet different requirements, is to simplify the selection of materials. This solves one of the major problems of injection molding tubes that require the use of materials with high requirements and characteristics, and to some extent, solves the problems of the extruded tube and the remaining tube manufacturing techniques. For example, it is now possible to use recycled materials, in particular to manufacture the outer tube, since it is now possible to ensure that these recycled materials do not come into contact with the packaged product and, therefore, the tubular container meets the current requirements relating to packaging in food, pharmaceuticals or cosmetics. legislation.

An additional advantage provided by at least some embodiments of the present invention is that the thickness of the outer tube can be reduced, for example, as compared to conventional injection molded tubes that do not include a double tube type in accordance with the present invention, since the outer tube of the present invention is only It has mechanical functions and does not require contact with the packaged product. This thickness reduction is not possible if the product is in contact with an external container because its permeability is affected. If the wall thickness is small, the container will have a large permeability, so the contained product will not be properly protected; therefore, some product components will penetrate and the properties of the product will change. In the present invention, the required impermeable property in the tubular container is provided by the inner container, which can be made of a laminate material (laminated composite material) containing an aluminum film or a polymer barrier, or only if it is necessary The permeable monolayer structure is independent of the permeability of the outer tube. It is also impossible to reduce the thickness of the wall portion in the case of injection molding of the tube, since this reduction significantly affects the complexity of achieving a good filling of the ejection cavity. To solve this problem, it is known in the art of plastic injection molding that the use of more fluid polymers allows the manufacture of articles having thinner walls; however, increasing fluidity generally requires changing key properties, such as ESCR resistance.

An additional advantage provided by at least some embodiments of the invention, and in particular by embodiments in which the tubular container returns to its outer shape after use, is that the tubular container provides better ergonomics. This is because in order to remove the stored product, it must be applied on the expanded tubular container. The pressure, that is, the application of pressure on a container that is shaped like a full volume, thus allows the user's hand to operate more comfortably. Another advantage of these embodiments is that the tubular container is capable of maintaining a constant appearance, i.e., remains as new even after repeated use, thereby maintaining an optimum appearance throughout its useful life. This is the case even in the case where the tubular container is airless, because the inner container remains deformed despite the outer tube returning to its original shape.

An additional advantage provided by at least some embodiments of the present invention, and in particular by the embodiment in which the shoulder of the inner container is internally secured to the outer tube head, is that in two tubes, compared to the conventional double tube approach A more effective and more resistant fixation is achieved between the two tubes in the conventional double tube mode, each having a head and the two heads of the tubes being assembled to each other. Moreover, embodiments of the present invention improve the regression rate as compared to the conventional double tube mode in which the two tubes are fixed by their individual heads. This rate of improvement is achieved because, in this way, even if the head of the inner container is made to have a thickness smaller than the head of the outer tube, the head of the inner container is not allowed to completely collapse or almost completely collapse; instead In the tubular container of the present invention, the shoulder of the inner container is flexible, and is preferably made of laminated plastic or metal-plastic composite material, and is welded to the inside of the head of the outer tube, allowing the shoulder to be The part is flexible and collapses.

An additional advantage provided by embodiments of at least some embodiments of the invention and particularly for widening and continuing the distal end of the inner container and contacting the distal end of the tubular container is that the distal seal of the tubular container is significantly improved.

1‧‧‧Tubular container

2‧‧‧ skirt

3‧‧‧ head

4‧‧‧Central vertical axis

5‧‧‧ Near end

6‧‧‧ distal

7‧‧‧ cavity

10‧‧‧External management

11‧‧‧ skirt

12‧‧‧ head

13‧‧‧Central vertical axis

14‧‧‧Internal space

15‧‧‧ Near end

16‧‧‧ distal

17‧‧‧ Shoulder

18‧‧‧Cylindrical platform

19‧‧‧ thread neck

20‧‧‧ transverse wall

21‧‧‧孔口

22‧‧‧Internal space

23‧‧‧ check valve

23a‧‧‧ sphere

23b‧‧‧ Conical seat

24‧‧‧孔口

25‧‧‧check valve

26‧‧‧Domains

27‧‧‧ edge

30‧‧‧Contents

31‧‧‧ skirt

32‧‧‧ shoulder

33‧‧‧Central vertical axis

34‧‧‧ inner space

35‧‧‧ Near end

36‧‧‧ distal

37‧‧‧孔口

38‧‧‧ edge

39‧‧‧Internal space

40‧‧‧ Seal joint

41‧‧‧ Widening area

50‧‧‧Conical parts

51‧‧‧Products

D1‧‧‧Down

D2‧‧‧ outside diameter

The details of the invention may be seen in the drawings, which are not intended to limit the scope of the invention. FIG. 1 is a cross-sectional elevational view of an outer tube of a tubular container according to an embodiment of the invention, the outer tube including a skirt, One head and two check valves.

Figure 2 shows a cross-sectional elevational view of a skirt and a shoulder separately manufactured to form an inner container of a tubular container in accordance with an embodiment of the present invention.

Figure 3 shows a cross-sectional elevation view of the skirt and shoulder of the previous figure, joined together to form the inner container.

Figure 4 shows a cross-sectional elevational view of the inner container inserted into the inner space of the outer tube.

Figure 5 shows a cross-sectional elevational view of the inner container fully inserted into the inner space of the outer tube.

Fig. 6 is a cross-sectional front view showing the distal end of the outer tube and the inner tube skirt in the case of Fig. 5.

Figure 7 shows a cross-sectional elevational view of a tapered member inserted through the distal ends of the outer and inner tubes.

Figure 8 is a cross-sectional elevational view showing the distal end of the skirt of the outer tube and the inner tube after the tapered member of Figure 7 is removed.

Figure 9 is a cross-sectional elevational view of a tubular container formed by the outer tube and the inner container.

Figure 10 shows an enlarged view of the head of the outer tube and the shoulder of the inner container, and in particular, a one-way valve disposed in the head of the outer tube and an intermediate cavity between the two tubes A magnified view of the connection.

Figure 11 shows a cross-sectional elevation view of the distal end of the tubular container sealed and containing a product therein.

Fig. 12 is a perspective view showing the appearance of the tubular container in the case of Fig. 11.

Figure 13 is a cross-sectional elevational view of the tubular container of Figure 11 in which the two opposing forces are being applied to compress the container to remove the product from its interior.

Figure 14 is a cross-sectional elevational view of the tubular container of Figure 11 showing that no force is applied in the continuation and the outer tube has returned to its undeformed shape, but the inner container remains deformed.

The present invention describes a tubular container made of a flexible material for containing cosmetics, food, medicine, or the like, and a method of manufacturing the flexible tubular container. A tubular container of this type is often characterized by a body or hollow skirt that is intended to receive a product (e.g., a cosmetic cream) and a head that is disposed at one end of the skirt and that allows for dispensing or dispensing the product. The head can be coupled to a product outlet neck, a cap, a dispensing mechanism, and the like. Manufacturers of tubular containers of this type typically close, cap, seal, and normally trim the head of the container, and supply the tubular containers to the product vendor in a state in which the opposite ends of the skirt are flared (for example, Cosmetic product seller). The product vendor fills the tubular containers with their products via the open end of the skirt and then seals the end of the skirt, which is then ready for public sale.

Figure 9 shows an example of an embodiment of a tubular container made of a flexible material in accordance with the present invention. The tubular container (1) is similar to other flexible tubular containers known in the prior art and includes a skirt (2) and a head (3). The skirt (2) is an elongated, hollow, and optionally cylindrical body disposed along a central longitudinal axis (4) and having a proximal end (5) and a distal end (6). The head (3) is arranged at the proximal end (5) of the skirt (2) and provides a closure for the proximal end (5). The head (3) of the tubular container may comprise various elements, such as a coupling system for attaching additional components, a perforable partial plug, a member for coupling differently shaped closed caps, a dispensing cap, a dispensing Tube, applicator, non-drip system, check system, etc.

As shown in Fig. 9, the tubular container (1) of the present invention comprises an outer tube (10) and an inner container (30) mounted in the outer tube (10).

The outer tube (10) illustrated separately in Figure 1 includes a skirt (11) and a head (12). The skirt (11) is an elongated, hollow, and optionally cylindrical body disposed along a central longitudinal axis (13). The skirt (11) has an inner space (14) and an inner diameter (d1), and a proximal end (15) and a distal end (16). The head (12) is then placed at the proximal end (15) of the skirt (11) and encloses the outer tube (10) while allowing a product to be dispensed from within the tubular container (1). In various embodiments of the 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 can have a simple exit aperture and an external thread for coupling a threaded cap. In other embodiments, the head may have a closed system coupled to the head, such as a cap, dispensing cartridge, or the like. In this embodiment, the head (12) includes: a shoulder (17); a generally cylindrical platform (18) extending from the shoulder (17); and a threaded neck (19) extending from The platform (18) is also intended to receive a threaded cap, cartridge, applicator, or other workpiece or mechanism (not shown). The threaded neck (19) terminates in a transverse wall (20) having an aperture (21). The head (12) defines an inner space (22) which, in the present embodiment, extends from the inner space (14) of the skirt (11) to the aperture (21) in the transverse wall (20).

Alternatively, a one-way valve (23) can be placed in the aperture (21) of the transverse wall (20), the type of the one-way valve allowing the product to be moved from the inside of the tube to the outside and prevent this The product and air are returned from the outside into the tube. For example, the check valve (23) shown in the drawing includes a ball (23a) that seals a conical seat (23b); the ball (23a) has an axial movement degree of freedom when pressure is applied The tube (10) allows passage of the product contained in the inner space (14, 22), and when the pressure disappears and a low pressure occurs inside (as explained later with reference to Figures 13 and 14), the outer portion is closed to the tube body. The air passage in the space (14, 22).

In certain embodiments of the invention, the outer tube (10) may comprise at least one aperture (24) that is fabricated in the skirt (11) and/or in the head (12) of the outer tube (10), It is used to provide an air passage between the outer portion of the outer tube (10) and the inner space (14, 22) of the outer tube (10). For example, in the present embodiment, an orifice (24) is provided in the platform (18) of the head (12) of the outer tube (10), allowing the inner space (14, 22) and the outer space (not labeled) ) Connected. In some embodiments, for example, in the present embodiment, a one-way valve (25) can be mounted in the orifice (24), the function of the one-way valve (25) allowing air to pass through the orifice (24) From the outside of the outer tube (10) into the inner space (14, 22) while preventing air from passing from the inner space (14, 22) to the outside of the outer tube (10) via the orifice (24). For example, as shown in the enlarged view in FIG. 10, the check valve of this embodiment (25) is formed as a plug that is inserted into the aperture (24) and mated with a flexible tapered obturator (26) when the air pressure from outside the tube is greater than the air in the tube The distal end of the obturator (26) (lower end in the figure) is opened during pressure, and the obturator (26) is closed when the air pressure in the tube is greater than the air pressure outside the tube. As shown in Fig. 9, the orifice (24) and the check valve (25) of the present embodiment are axially arranged, that is, disposed in the direction of the central longitudinal axis (13), and are disposed in the phase. Adjacent to the area in the platform (18) of the shoulder (17).

The outer tube (10) can be decorated with techniques such as lithography, flexography, silk screen, embossing, self-adhesive labeling, or in-mold labeling (IML).

Next, as shown in Fig. 3, the inner container (30) includes a skirt portion (31) and a shoulder portion (32). The skirt (31) is an elongated, hollow, optionally cylindrical body disposed along a central longitudinal axis (33) and having an interior space (34). The skirt (31) of the inner container (30) further presents a proximal end (35), a distal end (36), and an outer diameter (d2), wherein the outer diameter (d2) is preferably slightly smaller than the outer tube ( 10) The inner diameter (d1) of the skirt (11). The shoulder (32) of the inner container (30) is placed at the proximal end (35) of the skirt (31) and forms a wall that partially closes the proximal end of the skirt (31) and terminates at an edge (38). The shoulder (32) is flexible and has an inner space (39). Next, the edge (38) defines an aperture (37) for communicating the inner space (39) with the exterior of the inner container (30). Preferably, as in the case of this embodiment, the wall portion forming the shoulder (32) is substantially frustoconical, and the edges (38) and the holes (37) are concentric and their centers are disposed in the inner container. The central longitudinal axis of (30) (33). In some embodiments, the shoulder (32) can have a constant thickness. In other embodiments In one embodiment, for example, the thickness of the edge (38) is greater than the remainder of the shoulder (32). In an embodiment that is also encompassed by the present invention, the shoulder (32) includes at least one notch or region having a reduced thickness (not shown), for example, having a loop disposed around the central longitudinal axis (33), The function will be detailed later.

As mentioned before, the inner container (30) is arranged inside the outer tube (10), that is, inside the inner space (14) of the skirt (11) and the inner space of the head (12) of the outer tube (10). Part of (22) inside. As shown in Figure 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), the contact being defined by the shoulder A sealing joint (40) between the portion (32) and the head (12) is fluidly sealed. Preferably, the sealing joint (40) between the shoulder (32) and the head (12) consists of a fusion joint. The seal joint (40) prevents fluid from passing between the edge (38) of the shoulder (32) of the inner container (30) and the head (12) of the outer tube (10); throughout the sealing joint (40) Both prevent fluid from passing through and the sealing joint (40) extends 360° around the central longitudinal axis (4) of the tubular container (1).

As shown, the seal joint (40) is placed in a radially intermediate portion of the head (12) of the outer tube (10), radially closer to the center than the skirt (31) of the inner container (30). The shaft (4), and more specifically, on an edge (27) of the platform (18) adjacent to the inner space (22). In some embodiments, the edge (27) of the head (12) of the outer tube (10) may have a portion or protrusion (not shown) extending inwardly into the inner space (22), the function of which will be detailed later. .

Further, as mentioned above, the outer diameter (d2) of the skirt portion (31) of the inner container (30) is slightly smaller than the inner diameter (d1) of the skirt portion (11) of the outer tube (10), and therefore, The gap is defined between the skirt (11) of the outer tube (10) and the skirt (31) of the inner container (30). This difference in diameter is such that when the inner container (30) is expanded as explained later with reference to Figs. 7 and 8, the skirt (31) of the inner container (30) has sufficient deformability to adjust the outer tube (10). The inner diameter (d1) of the skirt (11).

The distal ends (16, 36) of the outer tube (10) and the inner container (30) are disposed at the distal end (6) of the skirt (2) of the tubular container (1). As shown in the enlarged view of Fig. 8, the skirt (31) of the inner container (30) includes a widened area (41) at the distal end (36) of the skirt (31). The length (h2) of the widening zone (41) remains contiguous and contacts the distal end (16) of the skirt (11) of the outer tube (10), preferably around the central longitudinal axis (4) of the tubular container (1), The entire circumference of the skirt (11) of the outer tube (10).

In a particular embodiment, the distal ends (16, 36) of the outer tubes (10) and the skirts (11, 31) of the inner container (30) are welded or bonded to one another in a length (h2) contact zone. The weld or adhesive can span the entire circumference of the central longitudinal axis (4) or be discontinuous. Fusion or adhesion can span all or part of the length (h2). The purpose of fusion or adhesion is twofold, the initial function is that once the tubular container (1) has been filled with the product, the fusion or adhesion ensures the distal end of the outer tube (10) and the skirt (11, 31) of the inner container (30) ( 16, 36) Stay in contact and continue until the distal end (6) of the tubular container is sealed. A system that must be considered, from the time of manufacture of the tubular container (1) of Figure 9 to its filling with a product and sealing at its distal end (6) may take a considerable amount of time and the tubular container (1) may be transported , storage, handling, etc., which may cause undesirable mechanical effects on the tubular container (1). Even with these potential mechanical effects, welding or adhesion helps to ensure contact in length (h2) and ensures inner container (30) and outer tube during final sealing of the distal end (6) of the tubular container (1) (10) A close bond is achieved. Fusion or sticking The second function is that in the specific case along the entire circumference, the welding or adhesion ensures that the inner wall of the distal end (16) of the skirt (11) of the outer tube (10) is perfectly welded to the inner container (30). The outer wall of the distal end (36) of the skirt (31). In this way, once the tubular container (1) has filled the product and sealed the distal end (6) of the tubular container (1), the product vendor only has to worry about proper welding of the inner container (30) because the outer tube (10) It has been welded beforehand at the time of supply. From the standpoint of the product vendor who needs to fill the container and seal the distal end (6), this way allows the tubular container (1) to behave like a single layer tube, which significantly simplifies the sealing of the distal end (6) because The tolerances between the nozzles introduced by the system and the walls of the tubes are very small.

As shown in Fig. 8, the aforementioned intermediate cavity (7) is defined above the widening zone (41). Therefore, as shown in Figures 8 and 9, the intermediate cavity (7) is composed of the head (12) of the outer tube (10), the shoulder (32) of the inner container (30), and the outer tube (10). ) defined by the skirt (11, 31) of the inner container (30).

In some embodiments, such as one of the embodiments shown in the figures, the outer tube (10) and the inner container (30) are sized such that the distal end of the skirt (11) of the outer tube (10) (16) The length (h1) is projected from the distal end (36) of the skirt (31) of the inner container (30) as shown in Fig. 8.

For the manufacture of the aforementioned tubular container (1), an example of a method of manufacturing a tubular container according to the present invention is described in detail below. Next, a method in which the product seller and the end user use the tubular container (1) will be described in order to explain the advantageous effects of the present invention.

Figures 1 through 10 show the sequence of manufacturing a tubular container (1) in accordance with an example of a manufacturing embodiment of the present invention.

In the initial step of the process, the outer tube (10), previously mentioned, illustrated in Figure 1, is produced, the outer tube (10) having a skirt (11) and a head (12). The outer tube (10) can be fabricated in one or a different stage by any conventional technique known in the art of flexible tubular container manufacture. For example, the outer tube (10) can be manufactured by extruding the skirt (11) and then covering-injecting the head (12). In other embodiments, the outer tube (10) can be produced by injection molding the skirt (11) and then coating the head (12) onto the skirt (11). In another example, the entire outer tube (10) can be produced by jointly molding the skirt (11) with the head (12). The outer tube (10) may comprise a formulation of one or more plastic materials, such as polypropylene, polyethylene, copolymers, and the like. Fabrication of the outer tube (10) can include decoration using techniques such as lithography, flexography, silk screen, embossing, self-adhesive labels, or in-mold labeling (IML).

In another initial step of the process, which can be performed before, after, or in parallel with the previous step, an inner container (30) having a skirt (31) and a shoulder (32) is fabricated. The skirt (31) and the shoulder (32) may be made of plastic, metal, or a combination thereof. The skirt (31) and the shoulder (32) may be fabricated together or may be fabricated separately and then joined together, as shown in Figures 2 and 3. More specifically, and by way of example, the skirt (31) may be composed of: a plastic film (for example, polyethylene), a metal-plastic composite film (for example, having a polyethylene or polypropylene outer coating or inner layer) Layer of aluminum, and the necessary adhesive to make a bond between the layers), plastic composite film (for example, with polyethylene or polypropylene coating and / or inner layer, the same floor is necessary for use) Adhesive EVOH Layer), or by other plastic transformation techniques (eg, extrusion or injection). If a film is used, the film will be deformed or flexed until a tubular shape (for example, a cylindrical shape) is obtained. The opposite longitudinal edges of the film are then welded or sealed to obtain a tubular sleeve. The fusion is performed by generating heat in the fusion zone. The heat causes the polymers in the opposite longitudinal edges to melt and stick to each other. This manufacturing method is known and used to manufacture a laminated tube intended to contain toothpaste. The heat generation can be achieved by a conventional resistance system or by a high frequency magnetic field (in the case of using a metal-plastic film). Finally, the skirt (31) is obtained by cutting a predetermined length of the tubular sleeve. Following this example, the shoulder (32) of the inner container (30) can then be: a plastic film (for example, polyethylene), a metal-plastic film (for example, a polyethylene or polypropylene outer coating and / or the inner layer of aluminum, also using the necessary adhesive to make a bond between the layers), plastic composite film (for example, with a polyethylene or polypropylene coating and / or inner layer of EVOH layer , also made with the necessary adhesive). Multiple portions of the film are cut and an orifice is made in each portion. The portions are then placed in a mold and pressure or embossing is applied to provide the shoulder with a three-dimensional cylindrical cone, as shown in the figures, wherein the aperture of each portion constitutes the shoulder (32) Orifice (37). Although a frustoconical shoulder (32) is shown herein; however, alternative embodiments in which the shoulder (32) can have different shapes can also be employed.

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), as shown in Fig. 3, thereby Attach them. For example, the fusion can be performed by hot air, conduction, ultrasonic waves, and the like. If skirt (31) and shoulder (32) If the two are made of a combination of plastic and metal, the fusion can also be carried out by a high frequency magnetic field.

Once the inner container (30) is obtained, the inner container (30) is inserted into 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 in the outer tube ( 10) advances along the inner space (14) of the outer tube (10). Finally, as shown in Figure 5, the shoulder (32) of the inner container (30), and more specifically the edge (38) surrounding the aperture (37), will contact the head of the outer tube (10). The inner wall of (12), and more specifically, the inner wall of the platform (18).

The shoulder (32) of the inner container (30) is then welded to the head (12) of the outer tube (10), for example by hot air, conduction, or high frequency (if the shoulder (32) and / or the head (12) is made of a combination of plastic and metal). As explained above, in addition to fixing the outer tube (10) and the inner container (30) to each other, the fusion is also at the edge (38) of the shoulder (32) of the inner container (30) and the outer tube (10). A sealing joint (40) is provided between the inner walls of the head (12).

As shown in Figure 6, once the inner container (30) has been inserted and secured to the outer tube (10), the outer tube (10) and the outer end of the inner container (30) are far from the skirt (11, 31) The ends (16, 36) are radially separated from each other by a gap or distance (r1). This distance (r1) is substantially equal to half the difference 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). . Furthermore, the distal end (16) of the skirt (11) of the outer tube (10) can protrude from the distal end (36) of the skirt (31) of the inner container (30) by a length (h1) as shown. However, alternative embodiments may also be employed 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), that is, the length (h1) Zero.

Next, as shown in Figures 7 and 8, an additional optional step is implemented to extend the distal end (36) of the inner container (30). In this step, the inner container (30), and optionally the outer tube (10), is deformed such that the open distal end (36) of the skirt (31) of the inner container (30) is widened until it The outer diameter (d2) and the inner diameter (d1) of the skirt (11) of the outer tube (10) are substantially the same, so that the distal end (36) of the skirt (31) of the inner container (30) is externally closed. The distal end (16) of the skirt (11) of the tube (10). For example, the deformation can be axially inserted into the open distal end (36) of the skirt (31) of the inner container (30) by axially inserting a member having a reduced diameter or a tapered member (50). The depth determined in advance is achieved. In some embodiments, heating may be performed along with the deformation, resulting in fusion of the distal ends (16, 36); in other embodiments, deformation is performed but not heated, causing the distal ends (16, 36) to become contiguous And contact. Once the tapered member (50) has deformed the distal end (36) of the skirt (31) of the inner container (30), the tapered member (50) is removed. In certain embodiments, such as the embodiments depicted herein, the distal end (16) of the skirt (11) of the outer tube (10) is not deformed. In other embodiments, the distal end (16) of the skirt (11) of the outer tube (10) is deformed and returns to its original cylindrical shape after the tapered member (50) is removed. In still other embodiments, the distal end (16) of the skirt (11) of the outer tube (10) is deformed and does not return to its original cylindrical shape after the tapered member (50) is removed. In any case, once the tapered member (50) is removed, as shown in Fig. 8, the length (h2) of the distal end (36) of the skirt (31) of the inner container (30) is attached. Connected to and contacts the skirt (11) of the outer tube (10). In some embodiments, in conjunction with or after the deformation, the weld or adhesive is applied along all or a portion of the perimeter of the wall of the distal ends (16, 36) of the skirts (11, 31), Thus, these distal ends (16, 36) are attached not only to the splicing but also along part or all of the circumference.

Once the outer tube (10) and the distal end (16, 36) of the skirt (11, 31) of the inner container (30) are deformed by the deformation, and by welding or adhering selectively along the entire circumference or A part is attached together, thus obtaining the tubular container (1) of Fig. 9. The tubular container (1) is characterized in that it has an outer tube (10) intended to be kept visible to the consumer and touched, and an inner container (30) intended to contact the product to be stored in the tubular container (1). .

Finally, if not already done, a cover (not shown) or any other optional additional element is added to the tubular container (1). The tubular container (1) is then sent to a product distributor, for example a cosmetic product seller, to allow them to fill the tubular container (1) with their product.

For the product seller, the tubular container (1) of the present invention is made up of two tubes, an outer tube (10) and an inner container (30), which have the appearance of a conventional tubular container, and more importantly It can be filled and sealed in the same manner as conventional tubular containers. The head (12) of the outer tube (10) forms the head (3) of the tubular container (1), whereas the skirt (11, 31) forms the skirt (2) of the tubular container (1). The distal ends (16, 36) of the outer tubes (10) and the skirts (11, 31) of the inner container (30) are in continuous contact with each other, and therefore, a single opening is provided in the skirt of the tubular container (1) ( The distal end (6) of 2) is intended to communicate with a single inner space of the tubular container (1) which is the inner space (34) of the inner container (30), allowing the tubular container to be filled in a conventional manner (1).

The product vendor (for example, a cosmetic product vendor) is based on a product (51) (shown in Figures 11, 13, and 14), for example, a paste, filled tubular container (1), via Opening of the tubular container (1) The distal end (6) fills the product (51) into the inner space (34, 39) of the inner container (30). Next, as shown in Fig. 11, the distal end (6) of the skirt (2) of the tubular container (1) is welded to the skirt (2) by heating, high frequency, adhesive, etc.; then, applying pressure To the distal end (6) of the skirt (2), the distal end (6) is flattened and sealed in a straight seal, as shown in Figure 12. More specifically, the seal is carried out along a belt having a distal end (6) of height (h3) that spans the widened area (41) of the distal end (36) of the skirt (31) of the inner container (30). Part or all of the length (h2), and further along the excess length (h1) of the skirt (11) of the outer tube (10), if there is such an excess length (h1). This ensures a tight and strong bond between the skirts (11, 31) along the widened zone (41) over the entire circumference of the skirt (11, 31). And optionally, the end of the skirt (11) of the outer tube (10) is sealed to itself along the excess length (h1) of the skirt (11) of the outer tube (10). Once welded, the product (51) is housed in the inner space of the tubular container (1) and, more specifically, in the inner space (34, 39) of the inner container (30), as shown in Fig. 11. Shown.

Figure 13 shows the process by which the user extrudes the product (51) from the inside of the tubular container (1). As illustrated, when the user wishes to partially dispense some product (51) from the tubular container (1), the user typically applies two relative lateral forces (F) by means of the fingers. These forces (F) cause the outer tube (10) to collapse towards the interior of the skirt (11) and increase the pressure in the intermediate cavity (7) between the outer tube (10) and the inner container (30). In the present embodiment, the outer tube (10) check valve (25) prevents air from being released from the intermediate cavity (7), so that the collapse of the skirt (11) and the pressure increase in the intermediate cavity (7) result in The inner container (30) compresses, more specifically, causes the skirt (31) of the inner container (30) to compress. In another embodiment, one or more orifices in the outer tube (10), in the middle The inter-cavity (7) is in communication and preferably has no valve, allowing air to flow out when the outer tube (10) is compressed, thereby allowing the outer tube (10) to contact and pushing the inner container (30), resulting in the inner container (30) The skirt (31) is compressed. When the skirt (31) of the inner container (30) is compressed, the edge (38) of the shoulder (32) of the inner container (30) remains welded to the head (12) of the outer tube (10). If the shoulder (32) of the inner container (30) contains at least one notch or region to reduce the thickness, if necessary, the notches further assist the shoulder (32) to be deflected downward when compressing the skirt (31) It is not necessary to flex the edge (38) of the shoulder (32) to excessively pull the head (12) of the outer tube (10).

The skirt (31) of the compressed inner container (30) causes an increase in pressure in the inner space (34, 39) of the inner container (30). When the pressure rises enough, the product (51) begins to pass through the aperture (37) in the shoulder (32) of the inner container (30) and the inner space (22) of the outer tube (10) (22). ), and the check valve (23) in the head (12) of the outer tube (10) is removed. When the user stops applying the forces (F), the skirt (31) of the inner container (30) tends to return to its original undeformed shape due to the elasticity of the inner portion (31), and then begins to open outwardly, thereby being in the intermediate cavity ( A vacuum is created in 7). This vacuum causes air to enter from the outside via the one-way valve (25) or, in some embodiments, through one or more valveless orifices in the outer tube (10) and in communication with the intermediate cavity (7) . Air entering the intermediate cavity (7) helps the skirt (11) of the outer tube (10) to return to its original shape, as shown in Figure 14. The check valve (23) of the head (12) of the outer tube (10) prevents the product (51) or the outside air from flowing back toward the inner space (22) of the head (12) of the outer tube (10), thus preventing the content toward The inner space (34, 39) of the device (30) is recirculated. As a result, the inner container (30) remains in the deformed position as shown in Fig. 14. Seal between the shoulder (32) of the inner container (30) and the head (12) of the outer tube (10) The joint (40) is formed in the middle of the head (12) of the outer tube (10), thereby helping the deformed inner container (30) not pull the undeformed outer tube (10) so that both can easily maintain their deformation Position and undeformed position.

In other words, the tubular container (1) described above is capable of maintaining its appearance after use (by restoring its undeformed appearance after extrusion as shown in Figures 12 and 14), and also forming an airless The container has the associated advantages (mainly the product (51) remains isolated from the outside air, improving its preservation and extending its service life).

Repetitive use of the tubular container (1) increases the compression of the inner container (30), while the outer tube (10) recovers as explained. Since the shoulder (32) can be greatly deformed and joined to the head (12) of the outer tube (10) by a sealed circumferential band (seal joint (40)), the shoulder (32) can be deformed And almost arbitrarily folded inward, resulting in a high degree of collapse and regression rate. If the edge (27) of the head (12) protrudes or has a portion to provide the sealing joint (40), when the product (51) is released, the shoulder is folded together with the skirt (31) of the inner container (30) (32) It may be advantageous to further increase the collapse of the inner container (30) and the regression rate of the tubular container (1).

As mentioned previously, in some embodiments, the intermediate cavity (7) is in the outer tube (10) (for example, in the shoulder (17) or in the skirt (11) of the outer tube (10) One or more permanent orifices (ie, permanently flared orifices) are in communication with the outside. This results in a lower cost tubular container because there is no one-way valve (25) and no assembly is required. The number and/or size of the orifices must provide an effective and free balance of the pressure loss through the intermediate chamber and the rate of recovery of the original shape of the outer tube.

As for the material of the outer tube (10) and the inner container (30) for producing the tubular container (1), as mentioned above, both the outer tube (10) and the inner container (30) may be made of a plastic material or a plastic composite material. , metal-plastic composite materials, one or more layers of textile materials, one or more layers of paper, combinations thereof, and the like. In short, it is contemplated that the outer tube (10) and the inner container (30) can be made of any material or formulation suitable for the tube of flexible material, for example, polypropylene, polyethylene, polyolefin copolymers. , aluminum laminated composite materials, EVOH laminated composite materials, and the like. However, in a preferred embodiment of the invention, the outer tube (10) is made of a plastic formulation and formed by injection molding techniques; however, the inner container (30) is preferably made of a plastic or metal-plastic formulation, and More specifically, plastic or metal-plastic laminate composites are formed by forming techniques.

Preferably, the material or materials from which the inner container (30) is made meet one or more of the following requirements: impermeable requirements, ESCR resistance requirements, delamination resistance requirements, food contact requirements, pharmacopoeia requirements , flexibility requirements, deformable requirements, etc. This allows the inner container (30) to fulfill the functionality described in the disclosure. Next, the material or materials from which the outer tube (10) is made meet one or more of the following requirements, such as: processability requirements, surface appearance requirements, printability requirements (can be printed), mechanical rigidity requirements (mechanical rigidity) In addition to the critical value), etc.; in addition, the material or materials from which the outer tube (10) is made may be made of 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. In other words, the outer tube (10) preferably does not meet the requirements of the inner container (30). For example, the material of the outer tube (10) is preferably not satisfied by the material of the inner container (30). Penetration, ESCR resistance, weldability, delamination resistance, food contact, pharmaceutical, flexibility and/or deformability requirements.

Preferably, the material or materials from which the inner container (30) is made do not meet the requirements of the material or materials from which the outer tube (10) is made. In other words, the inner container (30) preferably does not meet the requirements of the outer tube (10). For example, the material of the inner container (30) preferably does not satisfy the processability, surface appearance, printability, mechanical rigidity, and/or weldability requirements of the material of the outer tube (10).

The division of functional requirements into two components - the inner container (30) and the outer tube (10) - means that none of these constituents must satisfy all of the requirements at the same time, thus helping to select the material for each tube. This simplifies manufacturing and improves the quality of the final tubular container (1) (quality is understood to be the ability of the tubular container (1) to meet its functional requirements during its useful life).

In summary, the problem of incomplete regression rate of a double-tube airless container is solved by an inner container provided with a skirt portion and a shoulder portion in the form of a wall having a gradually smaller diameter, the phase of which is The deformation of the head of the inner tube, which is known in the prior art, exhibits greater deformability.

On the other hand, the problem of achieving a proper seal between an outer tube and the distal end of an inner container disposed within the outer tube is solved by widening or expanding the distal end of the inner container until It continues and contacts the distal end of the outer tube, and then seals two consecutive distal ends to form a tight junction between the distal ends along their entire circumference. It is contemplated that this can be used in another tubular container of the tubular container shown herein, for example, in the tubular tube and the inner container, including a skirt and a different head. In the container.

Moreover, the complexity of selecting materials is solved by creating a tubular container that is provided with an inner container that is intended to remain hidden and that contacts the product to be stored, while the outer tube is intended to be visible, Wherein, the material of each of the tubes meets different functional requirements, and most importantly, the outer tube does not meet the requirements of the inner container. It is contemplated that this can be used in another tubular container of the tubular container shown herein, for example, in the tubular tube and the inner container, including a skirt and a different head. In the container.

10‧‧‧External management

11‧‧‧ skirt

12‧‧‧ head

13‧‧‧Central vertical axis

14‧‧‧Internal space

15‧‧‧ Near end

16‧‧‧ distal

17‧‧‧ Shoulder

18‧‧‧Cylindrical platform

19‧‧‧ thread neck

20‧‧‧ transverse wall

22‧‧‧Internal space

23‧‧‧ check valve

23a‧‧‧ sphere

23b‧‧‧ Conical seat

24‧‧‧孔口

25‧‧‧check valve

26‧‧‧Domains

27‧‧‧ edge

D1‧‧‧Down

Claims (59)

A tubular container (1) of flexible material, comprising: an outer tube (10) having a skirt portion (11) and a head portion (12), wherein the skirt portion (11) has a proximal end (15) And a distal end (16), wherein the head (12) extends from the proximal end (15) of the skirt (11), and wherein the skirt (11) and the head (12) define a An inner space (14, 22) capable of communicating with an exterior of the outer tube (10) via an aperture (21) in the head (12); an inner container (30) having a skirt (31) and a flexible shoulder (32), wherein the skirt (31) has a proximal end (35) and a distal end (16), wherein the shoulder (32) extends from the skirt ( The proximal end (35) of 31), and wherein the skirt (31) and the shoulder (32) define an inner space (34, 39) and the shoulder (32) terminates at an edge (38) The edge defines an aperture (37) in communication with the inner space (34, 39); wherein the inner container (30) is disposed in the inner space (14, 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), the aperture (21) of the head (12) of the outer tube (10) It is in communication with the inner space (34, 39) of the inner container (30). A tubular container (1) according to claim 1 comprising at least one one-way valve (23) that allows a fluid to exit the inner space (34, 39) of the inner container (30) to the outer tube (10) External and prevent air from entering the inner space (34, 39) of the inner container from the outside of the outer tube (10). A tubular container (1) according to claim 2, wherein the one-way valve (23) is disposed in the orifice (21) of the head (12) of the outer tube (10). A tubular container (1) according to claim 1, wherein the skirt (31) of the inner container (30) does not protrude from the skirt (11) of the outer tube (10). The tubular container (1) of claim 1, wherein the shoulder (32) of the inner container (30) is secured to the outer tube (10) by the edge (38) of the shoulder (32) The head (12). The tubular container (1) of claim 1, wherein the shoulder (32) is secured to the head (12) of the outer tube (10) via a sealing joint (40), the sealing joint along The entire circumference of the central longitudinal axis (4) of the tubular container (1) extends continuously. A tubular container (1) according to claim 1, wherein an intermediate cavity (7) is defined between the outer tube (10) and the inner container (30). The tubular container (1) of claim 7, wherein the shoulder (32) is secured to the head (12) of the outer tube (10) via a sealing joint (40), the sealing joint along The entire circumference of the central longitudinal axis (4) of the tubular container (1) extends continuously. The tubular container (1) of claim 8, wherein the intermediate cavity (7) is located radially outward of the seal joint (40) with respect to the central longitudinal axis (4). The tubular container (1) of claim 9, wherein the shoulder (32) of the inner container (30) is joined to the head of the outer tube (10) only along the sealing joint (40) (12) Thereby, the remainder of the shoulder (32) is located radially outside of the seal joint (40) and is separated from the outer tube (10). The tubular container (1) of claim 8, wherein the intermediate cavity (7) extends from the sealing joint (40) to the distal end (36) of the skirt (31) over the tubular container (1) The skirt (31) of the central longitudinal axis (4) and the entire circumference of the shoulder (32). The tubular container (1) of claim 11, wherein the distal end (36) of the skirt (31) of the inner container (30) contacts the distal end of the skirt (11) of the outer tube (10) End (16). The tubular container (1) of claim 9, wherein the distal end (36) of the skirt (31) of the inner container (30) contacts the outer tube over the entire circumference of the central longitudinal axis (4) (10) The distal end (16) of the skirt (11). The tubular container (1) of claim 10, wherein the distal end (36) of the skirt (31) of the inner container (30) is secured to the outer tube along at least a portion of the perimeter ( 10) The distal end (16) of the skirt (11). The tubular container (1) of claim 7, wherein the outer tube (10) includes at least one orifice (24) that allows the intermediate cavity (7) to communicate with the exterior of the outer tube (10). The tubular container (1) of claim 15, wherein a one-way valve (25) is disposed in the orifice (24), the one-way valve (25) allowing air to enter from outside the outer tube (10) The intermediate cavity (7) also prevents air from exiting the intermediate cavity (7) to the exterior of the outer tube (10). The tubular container (1) of claim 16, wherein the intermediate cavity (7), the orifice (24), and the one-way valve (25) are located at the sealing joint with respect to the central longitudinal axis (4) ( 40) Radial outside. A method of manufacturing a tubular container (1) of flexible material, comprising the steps of: obtaining an outer tube (10) having a skirt portion (11) and a head portion (12), wherein the skirt portion (11) There is a proximal end (15) and a distal end (16), wherein the head (12) extends from a proximal end (15) of the skirt (11), and wherein the skirt (11) and the head (12) defining an inner space (14, 22), The inner space can communicate with the outside of the outer tube (10) via an aperture (21) in the head (12); an inner container (30) having a skirt (31) and a flexible a shoulder (32), wherein the skirt (31) has a proximal end (35) and a distal end (16), wherein the shoulder (32) extends from the proximal end of the skirt (31) ( 35), and wherein the skirt (31) and the shoulder (32) define an inner space (34, 39) and the shoulder (32) terminates at an edge (38) defining the inner edge An opening (37) in communication with the space (34, 39); wherein the inner container (30) is inserted into the inner space (14, 22) of the outer tube (10), and the inner container (30) The shoulder (32) is fixed to the head (12) of the outer tube (10), and the opening (21) of the head (12) of the outer tube (10) is coupled to the inner container (30) The inner space (34, 39) is connected. The method of claim 18, wherein the step of obtaining an outer tube (10) comprises taking the skirt (11) of the outer tube (10) by extrusion and over-injection moulding The head portion (12) of the outer tube (10) is formed on the skirt portion (11) of the outer tube (10). The method of claim 18, wherein the step of obtaining an outer tube (10) comprises taking the skirt (11) of the outer tube (10) by injection molding and molding the outer tube (10) via a coating. The head (12) of the outer tube (10) is formed on the skirt (11). The method of claim 18, wherein the step of obtaining an inner container (30) comprises obtaining the outer tube (10) by integrally molding the skirt (11) of the outer tube (10) with the head (12). ). The method of claim 18, wherein the step of obtaining an inner container (30) comprises taking the skirt (31) of the inner container (30) by extrusion and molding the outer container (30) via a wrap. The shoulder (32) of the inner container (30) is formed on the skirt (31). The method of claim 18, wherein the step of obtaining an inner container (30) comprises taking the skirt (31) of the inner container (30) by injection molding and molding the outer container (30) via a coating. The shoulder (32) of the inner container (30) is formed on the skirt (31). The method of claim 18, wherein the step of obtaining an inner container (30) comprises obtaining the inner container (30) by jointly injecting the skirt (31) of the inner container (30) with the shoulder (32). ). The method of claim 18, wherein the step of obtaining an inner container (30) comprises taking a first film of a plastic or metal-plastic composite material, deforming the first film until a tubular shape is obtained, and sealing the tubular shape phase Adjacent edge to maintain the tubular shape to obtain the skirt (31) of the inner container (30); obtaining a second film of plastic or metal plastic composite; making an aperture in the second film; embossing The second film having the aperture to form the shoulder (32) of the inner container (30); and securing the shoulder (32) of the inner container (30) to the inner container (30) The skirt (31). A tubular container (1) of flexible material, comprising: an outer tube (10) comprising a skirt portion (11) and a head portion (12), wherein the skirt portion (11) has a proximal end (15) And a distal end (16), wherein the head (12) extends from the proximal end (15) of the skirt (11), and wherein the skirt (11) and the head (12) define An inner space (14, 22), the inner space The chamber can communicate with the outside of the outer tube (10) via an aperture (21) in the head (12); an inner container (30) including a skirt (31), the skirt (31) Having a proximal end (35) and a distal end (16); wherein the inner container (30) is disposed in the inner space (14, 22) of the outer tube (10), and the inner container (30) The distal end (36) of the skirt (31) flares out and contacts the distal end (16) of the skirt (11) of the outer tube (10). The tubular container (1) of claim 26, wherein the distal end (36) of the skirt (31) of the inner container (30) is flared and along a central longitudinal axis surrounding the tubular container (1) ( The entire circumference of 4) contacts the distal end (16) of the skirt (11) of the outer tube (10). The tubular container (1) of claim 26, wherein the distal end (36) of the skirt (31) of the inner container (30) is configured to conform to the skirt (11) of the outer tube (10) The distal end (16) is flush. The tubular container (1) of claim 26, wherein the length (h1) of the distal end (16) of the skirt (11) of the outer tube (10) is from the skirt of the inner container (30) ( The distal end (36) of 31) protrudes. The tubular container (1) of claim 26, wherein the distal end (36) of the skirt (31) of the inner container (30) surrounds the central longitudinal axis (4) of the tubular container (1) At least a portion of the circumference is secured to the distal end (16) of the skirt (11) of the outer tube (10). The tubular container (1) of claim 30, wherein the distal end (36) of the skirt (31) of the inner container (30) is secured to the outer tube by welding, adhesive, or a combination thereof ( 10) The distal end (16) of the skirt (11). A method of manufacturing a tubular container (1) of flexible material, comprising the steps of: obtaining an outer tube (10) comprising a skirt (11) and a head (12), wherein the skirt (11) Having a proximal end (15) and a distal end (16), wherein the head (12) extends from the proximal end (15) of the skirt (11), and wherein the skirt (11) and the The head (12) defines an inner space (14, 22) that can communicate with an exterior of the outer tube (10) via an aperture (21) in the head (12); 30), comprising a skirt portion (31), wherein the skirt portion (31) has a proximal end (35) and a distal end (16); the inner container (30) is inserted into the outer tube (10) Between the inner space (14, 22); and the distal end (36) of the skirt (31) of the inner container (30), the skirt (31) of the inner container (30) The distal end (36) remains flared and contacts the distal end (16) of the skirt (11) of the outer tube (10). The method of claim 32, wherein the step of expanding the distal end (36) of the skirt (31) of the inner container (30) comprises surrounding a central longitudinal axis (4) of the tubular container (1) The entire circumference of the distal end (36) of the skirt (31) of the inner container (30) is expanded, and the distal end (36) of the skirt (31) of the inner container (30) remains outside. The distal end (16) of the skirt (11) of the outer tube (10) is expanded and over the entire circumference. The method of claim 32, wherein the step of expanding the distal end (36) of the skirt (31) of the inner container (30) comprises inserting a tapered member (50) into the inner container (30) In the distal end (36) of the skirt (31), and deforming the distal end (36) of the skirt (31) of the inner container (30) against the outer tube (10) The distal end (16) of the skirt (11). The method of claim 32, wherein the step of inserting the inner container (30) comprises inserting the inner container (30) up to the distal end (36) of the skirt (31) of the inner container (30) and the The distal end (16) of the skirt (11) of the outer tube (10) is flush. The method of claim 32, wherein the step of inserting the inner container (30) comprises inserting the inner container (30) until the length of the distal end (16) of the skirt (11) of the outer tube (10) (h1) projecting from the distal end (36) of the skirt (31) of the inner container (30). The method of claim 32, further comprising the distal end (36) of the skirt (31) of the inner container (30) along a circumference around a central longitudinal axis (4) of the tubular container (1) At least a portion of the length is secured to the distal end (16) of the skirt (11) of the outer tube (10). 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, adhering, or a combination thereof. The method of claim 32, wherein the step of obtaining an outer tube (10) comprises taking the skirt (11) of the outer tube (10) by extrusion and molding the outer tube (10) via a coating. The head (12) of the outer tube (10) is formed on the skirt (11). The method of claim 32, wherein the step of obtaining an outer tube (10) comprises taking the skirt (11) of the outer tube (10) by injection molding and molding the outer tube (10) via a coating. The head (12) of the outer tube (10) is formed on the skirt (11). The method of claim 32, wherein the step of obtaining an outer tube (10) comprises obtaining the outer tube (10) by integrally ejecting the skirt (11) of the outer tube (10) with the head (12). . The method of claim 32, wherein the step of obtaining an inner container (30) comprises obtaining the skirt (31) of the inner container (30) by extrusion. The method of claim 32, wherein the step of obtaining an inner container (30) comprises obtaining the skirt (31) of the inner container (30) by injection molding. The method of claim 32, wherein the step of obtaining an inner container (30) comprises taking a laminate of a plastic or metal plastic composite, deforming the laminate until a tubular shape is obtained, sealing adjacent edges of the tubular shape to maintain The tubular shape and the skirt (31) of the inner container (30) is taken. A tubular container (1) of flexible material comprising a skirt (2), a head (3), and an inner space for containing a product (51), the tubular container (1) comprising: an outer tube (10) comprising a skirt portion (11) and a head portion (12), wherein the skirt portion (11) has a proximal end (15) and a distal end (16), wherein the head portion (12) Extending from the proximal end (15) of the skirt (11), and wherein the skirt (11) and the head (12) define an inner space (14, 22) through which the inner space can pass An orifice (21) in the portion (12) is in communication with the outside of the outer tube (10); an inner container (30) is disposed in the inner space (14, 22) of the outer tube (10) And the inner container (30) has an inner space (34, 39) that provides at least a portion of the inner space of the tubular container (1) and the head of the outer tube (10) The hole (21) of (12) is in communication; wherein at least a portion of the inner container (30) is made of a first material or a first material combination configured to meet the first requirement; At least a portion of the outer tube (10) is made of a second material or combination of materials that are not configured to meet the first requirement. The tubular container (1) of claim 45, wherein the first requirement is an impermeable requirement. The tubular container (1) of claim 45, wherein the first requirement is an ESCR resistance requirement. The tubular container (1) of claim 45, wherein the first requirement is an anti-delamination requirement. The tubular container (1) of claim 45, wherein the first requirement is a food contact requirement. The tubular container (1) of claim 45, wherein the first requirement is a pharmacopoeia requirement. The tubular container (1) of claim 45, wherein the first requirement is a flexibility requirement. The tubular container (1) of claim 45, wherein the first requirement is a deformable requirement. The tubular container (1) of claim 45, wherein the second material or combination of materials comprises recycled material. The tubular container (1) of claim 45, wherein the second material or combination of materials is configured to satisfy a second requirement that the first material or combination of first materials cannot meet. The tubular container (1) of claim 54, wherein the second requirement is a processability requirement. The tubular container (1) of claim 54, wherein the second requirement is a surface appearance requirement. The tubular container (1) of claim 54, wherein the second requirement is a printability requirement. The tubular container (1) of claim 54, wherein the second requirement is a mechanical rigidity requirement. A method of manufacturing a tubular container (1) of flexible material, the tubular container (1) comprising a skirt (2), a head (3) and an inner space for receiving a product (51), the method comprising Obtaining a first material or a first material combination configured to meet the first requirement; using the first material or the first material combination to obtain an outer tube (10) including a skirt portion (11) and a head portion (12) Wherein the skirt (11) has a proximal end (15) and a distal end (16), wherein the head (12) extends from the proximal end (15) of the skirt (11), and Wherein the skirt portion (11) and the head portion (12) define an inner space (14, 22) through which the inner space can pass through an aperture (21) in the head portion (12) External communication; obtaining a second material or a second material combination that is not configured to meet the first requirement; utilizing the second material or the second material combination to obtain an inner container (30) including an inner space (34, 39) Inserting the inner container (30) into the inner space (14, 22) of the outer tube (10), the inner space (34, 39) providing at least a portion of the inner space of the tubular container (1), And the inner space (34, 39) and the head of the outer tube (10) (21) communicating (12) of the hole.