Composite packaging structure
The sealed bag and base design with three welded seams solves the problems of sealing and storage space in paste product packaging, achieving efficient utilization of contents and reducing residue.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-05
- Publication Date
- 2026-03-20
AI Technical Summary
Existing packaging structures for ointment products suffer from poor sealing performance, limited space, and difficulty in upright placement, leading to easy spoilage and waste of the contents.
Design a composite packaging structure that uses a sealed bag surrounded by three welded seams, combined with a base and welding nozzle to form a three-dimensional structure that can expand and gradually decrease inside the container to squeeze out the contents and reduce residue.
It achieves high sealing performance and large capacity, leaving almost no residue of contents during use, avoiding waste, and is suitable for various container types.
Smart Images
Figure CN224014339U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging products, and more specifically to a composite packaging structure. Background Technology
[0002] Paste-like products, primarily daily chemical products, are typically packaged in plastic bottles or bags. The contents are extruded by pressing the bottle or bag, or by pressing a pump. Compared to bags, plastic bottles have relatively weaker sealing properties, and when contents adhere to the sides, they are difficult to expel, posing a greater risk of spoilage and resulting in significant waste. Bags, on the other hand, have limited space and are difficult to store upright, thus limiting their applicability.
[0003] In view of this, it is necessary to improve the packaging structure in the existing technology to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to disclose a composite packaging structure that combines the advantages of high sealing and low residue of contents, while having a large volume and being able to be placed upright, thus having a wide range of applications.
[0005] To achieve the above objectives, this utility model provides a composite packaging, comprising: a sealed bag, the sealed bag comprising a bag body, a welding nozzle and a base, the base being connected to the shoulder of the bag body, the welding nozzle being fixed to the base and extending out of the bag body, the bag body being formed by three welded seams from a sheet body, the bag body being assembled inside a container and the welding nozzle being accommodated at the opening of the container;
[0006] The three welds include a first weld, a second weld and a third weld formed at both ends of the length of the first weld, the second weld forming the shoulder of the bag body to connect to the base, and the second weld and the third weld being perpendicular to each other.
[0007] As a further improvement of this utility model, the welding nozzle has a connecting part, the connecting part is disposed through the base to allow the contents inside the bag to pass through, and the base is formed as a three-dimensional structure assembled on the shoulder of the bag.
[0008] The vertical projection of the base is rhomboid, circular, or elliptical.
[0009] As a further improvement of this utility model, the base is composed of a cylindrical body extending radially to both sides to form an extension portion, and the side of the extension portion away from the cylindrical body of the base forms a vertex angle of less than or equal to 90 degrees.
[0010] As a further improvement of this utility model, the base is centrally located at the shoulder formed by the second weld seam on the bag body.
[0011] As a further improvement of this utility model, the cylindrical body of the base and the extension integrally formed with the cylindrical body have a smooth transition between each other on their outer surfaces, and the number of friction-increasing stripes is greater than or equal to two. The shoulder of the bag body forms a second weld and is adsorbed onto the friction-increasing stripes.
[0012] As a further improvement of this utility model, the sheet is optionally configured as a composite film, and the sheet has a main layer and a barrier layer.
[0013] As a further improvement of this utility model, the connecting part is formed as a threaded section or a snap fastener.
[0014] As a further improvement of this utility model, a threaded section is formed on the outer surface of the opening of the container.
[0015] As a further improvement of this utility model, the container is provided with an exhaust port.
[0016] As a further improvement of this utility model, the first weld, the second weld, and the third weld all have reserved seams on the cavity side away from the bag body.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: The bag body is composed of a sheet, which is further enclosed by three welds to form a sealed bag body and connected to a base at the shoulder. The three welds include a first weld along the length of the sheet, a second weld and a third weld at both ends along the length of the sheet, and the second weld, serving as the shoulder of the bag body, is perpendicular to the third weld. The first weld is also perpendicular to the third weld, so that the bag body forms a three-dimensional structure in which a triangle is formed when cut perpendicularly along the first, second, or third weld. After the bag body is placed into the container, the process of filling the bag body with a paste or other fluid contents through the welding nozzle will continuously expand the bag body, causing its volume to gradually increase and gradually occupy the internal space of the container until the bag body is filled with the specified amount of contents. Through the aforementioned structural design of the bag body, namely the spatial relationship between the first, second, and third welds, the bag body has a sufficiently large capacity. When the contents of the bag are further used by squeezing or pumping, the volume of the bag gradually decreases so that the contents are discharged in a state of almost no residue. Compared with the existing technology, this effectively reduces the situation of contents remaining inside the container and effectively avoids waste. Attached Figure Description
[0018] Figure 1 This is a schematic diagram illustrating the structure of the bag body in this utility model;
[0019] Figure 2 This is a schematic diagram illustrating the structure of the container in this utility model;
[0020] Figure 3 It is a schematic structural diagram for reflecting the sheet body in the present utility model;
[0021] Figure 4 is Figure 1 the enlarged view of part A in
[0022] Figure 5 It is a schematic structural diagram of the bag body in the prior art. Specific embodiments
[0023] The present utility model will be described in detail below in conjunction with the embodiments shown in the drawings. However, it should be noted that these embodiments are not limitations on the present utility model. Any equivalent transformation or substitution in terms of function, method, or structure made by those of ordinary skill in the art based on these embodiments shall fall within the protection scope of the present utility model.
[0024] Refer Figure 1 and Figure 2 This is a specific embodiment of a composite packaging disclosed by the present utility model. The sealing bag 1 therein is actually used to contain and contact the content, and then the entire sealing bag 1 is placed inside the container 2. Specifically, the bag body 11 of the sealing bag 1 is located inside the container 2, and the welding nozzle 12 of the sealing bag 1 passes through the opening 21 of the container 2. More specifically, in this embodiment, the container 2 is selected as a plastic bottle, so the opening 21 of the container 2 is specifically the bottle mouth of the bottle body. Further, in this embodiment, the bag body 11 has a total of three welds including the first weld 111, the second weld 112, and the third weld 113. Through the spatial vertical relationship between the first weld 111, the second weld 112, and the third weld 113, the bag body 11 is formed into a three-dimensional structure surrounded by three triangular planes. Compared with the bag body surrounded by four welds that is more common in the prior art, first, the side surface area of the bag body 11 is significantly reduced so that it can be accommodated in the cylindrical container 2. And, compared with the bag body surrounded by four welds, it has a greater width, and thus has a larger accommodation space. After the entire sealing bag 1 is placed in the container 2 and filled with the content, during the use of the content, the volume of the sealing bag 1 gradually decreases to achieve the effect of extruding the content, thereby effectively avoiding waste caused by the content remaining inside the container.
[0025] Refer Figure 1 and Figure 2As shown, in this embodiment, the composite packaging includes a sealed bag 1. The sealed bag 1 includes a bag body 11, a welding nozzle 12, and a base 13. The base 13 is connected to the shoulder 14 of the bag body 11. The welding nozzle 12 is fixed to the base 13 and extends out of the bag body 11. The bag body 11 is formed by three welded seams from a sheet 10. The bag body 11 is assembled inside a container 2, and the welding nozzle 12 is accommodated at the opening 21 of the container 2. The three welds include a first weld 111 formed along the length or width direction of the sheet 10, and a second weld 112 and a third weld 113 formed at both ends of the length direction of the first weld 111. The second weld 112 is formed as the shoulder 14 of the bag body 11 to connect to the base 13. The second weld 112 and the third weld 113 are perpendicular to each other. In this embodiment, the forming directions of the first weld 111, the second weld 112, and the third weld 113 are shown in the figure. Figure 1 As shown by the dashed line.
[0026] It should be noted that further integration Figure 4 As shown, this is a common form of sealed bag 100 in the prior art, which typically consists of two sheets 101 that are bonded together around their perimeter to form four weld seams 102. Its shoulder 103 also has a welding nozzle 104 for filling and use of the contents. Figure 4 As can be seen, the structure of the sealing bag 100 is close to a flat square or rectangle. Only a small containing cavity 105 is formed in the central area. While the cavity 105 has a certain length and height, its width is very limited, resulting in a very limited containing space and a small capacity for the contents. Furthermore, this type of sealing bag 100 is typically used alone for packaging items such as hand cream, facial cleanser, or laundry detergent refills. Its relatively flat structure makes it inconvenient to place, posing a certain difficulty for users. Moreover, its structure is difficult to adapt for use with containers primarily made of plastic bottles, whose sealing performance is less effective at protecting the contents compared to sealing bags.
[0027] In contrast, in this embodiment, specific parameters Figure 1As shown in the figure, the bag body 11 of the sealed bag 1 is composed of a sheet body 10. Further, the sheet body 10 is enclosed by three weld seams to form a sealed bag body 11 and is connected to the base 13 at the shoulder 14. The three weld seams include a first weld seam 111 formed along the length direction of the sheet body 10, a second weld seam 112 and a third weld seam 113 formed at both ends of the sheet body 10 in the length direction. And the second weld seam 112 is perpendicular to the third weld seam 113 as the shoulder 14 of the bag body 11, so that the bag body 11 forms a three-dimensional structure that is triangular when vertically cut along the first weld seam 111, the second weld seam 112 or the third weld seam 113. After the bag body 11 is placed into the container 2 as a whole, during the process of injecting a fluid content such as paste into the bag body 11 through the welding nozzle 12, the bag body 11 will be continuously expanded, so that its volume gradually increases and gradually occupies the internal space of the container 2 until the bag body 11 is filled with a specified amount of content. Through the above structural design of the bag body 11, that is, the spatial relationship between the first weld seam 111, the second weld seam 112 and the third weld seam 113, the bag body 11 has a sufficiently large accommodation space. Further, when the content in the bag body 11 is used by extrusion or pumping, the volume of the bag body 11 gradually decreases to discharge the internal content in a state close to no residue, effectively reducing the situation that the content remains in the container compared with the prior art and effectively avoiding waste.
[0028] Refer to Figure 3 As shown in the figure, the sheet body 10 is selected as a composite film, and the sheet body 10 has a main body layer 10a and a barrier layer 10b. It should be noted that the main body layer 10a is selected as a composite sheet with PE or PP as the main body, and the barrier layer 10b is selected as an aluminum foil, an aluminized film, a co-extruded film containing EVOH (ethylene / vinyl alcohol copolymer), or a film with a coating layer of EVOH. Through the above selection of the sheet body 10, the sealed bag 1 has a good oxygen and moisture barrier effect, so as to achieve the effect of effectively protecting the content to avoid its deterioration. Further, it also has the effect of avoiding the content adhering to the bag body 11 to a certain extent, resulting in being unable to be taken.
[0029] Refer to Figure 1 and Figure 2 As shown in the figure, the welding nozzle 12 has a connecting portion 121, and the connecting portion 121 is formed as a threaded section or a buckle, specifically refer to Figure 1The connecting part 121 shown is set as a snap 1211; in this embodiment, the container 2 is selected as a plastic bottle, so the opening 21 of the container 2 is specifically an opening with threads. More specifically, the shoulder 22 and the main body 23 of the container 2 are connected together by split welding. When the sealed bag 11 is placed into the container 2, the welding nozzle 12 passes through the opening 21 connected to the shoulder 22, and the welding nozzle 12 has a clamping block (not shown) that can be clamped at the opening to fix the sealed bag 1 as a whole inside the container 2. Then, the main body 23 of the container 2 is sleeved outside the bag body 11 and docked with the shoulder 22, and finally, the shoulder 22 and the main body 23 are welded together to complete the assembly of the entire composite container. Refer Figure 2 As shown, the container 2 is formed with an exhaust hole 24, and the exhaust hole 24 is formed at the bottom surface of the container 2. More specifically, in this embodiment, a pump head (not shown) also needs to be connected to the opening 21 of the container 2. The pump head is threadedly connected to the opening 21 and is clamped and fixed to the connecting part 121 of the welding nozzle 12. When taking out the content, the content inside the sealed bag 1 is pumped out through the pump head, and gas continuously enters the inside of the container 2 through the exhaust hole 24 to achieve the purpose of pressing the bag body 11, so that the content contained in the bag body 11 can be taken out more cleanly. Through the above solution, the composite packaging structure in this embodiment can achieve a better protection effect on the content and can make full use of the space inside the container, and only three welds need to be processed to achieve the above effect, which has the effect of being convenient for production.
[0030] Refer Figure 1 and Figure 4 As shown, the connecting part 121 is arranged through the base 13 for the content inside the bag body 11 to pass through. The base 13 is formed as a three-dimensional structure assembled on the shoulder 14 of the bag body 11. Specifically, the vertical projection of the base 13 is a rhombus, a circle or an ellipse. Further, in this embodiment, the base is composed of a cylindrical main body 131 extending respectively to both radial sides to form an extension part 32. The side of the extension part 132 away from the cylindrical main body 131 of the base 131 forms an apex angle less than or equal to 90 degrees. The base 13 is centrally arranged at the shoulder 14 formed by the second weld 112 of the bag body 11. The outer surfaces of the cylindrical main body 131 of the base 13 and the extension part 132 integrally formed with the cylindrical main body 132 are smoothly transitioned and are uniformly distributed with anti-slip stripes 133 with a quantity greater than or equal to two. The shoulder 14 of the bag body 11 forms a second weld and adsorbs at the anti-slip stripes 133.
[0031] Through the above design, the base 13 is composed of a cylindrical main body 131 and an extension 132, forming a three-dimensional structure with a vertical projection close to a rhombus. The extension 132 guides the base 13 to extend into the shoulder 14 of the bag body 11, that is, it expands the bag body 11 when the shoulder 14 is not formed. The cylindrical main body 131 is designed for the installation of the connecting part 121 for the injection and outflow of contents. It should be noted that, through the design of the friction-enhancing stripes 133, during the subsequent welding of the second weld 112, the friction-enhancing stripes 133 have the effect of mutual adsorption with the sheet 10, thereby improving the sealing effect at the contact point between the sheet 10 and the base 13. Furthermore, in this embodiment, the first weld 111, the second weld 112, and the third weld 113 all form a reserved seam (not shown) on the cavity side away from the bag body 11. Specifically, the reserved seam is set as a blank position left unwelded during the welding process, which effectively avoids delamination and weld failure at the weld.
[0032] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.
[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A composite packaging structure, characterized in that, include: A sealed bag, comprising a bag body, a welding nozzle, and a base, wherein the base is connected to the shoulder of the bag body, the welding nozzle is fixed to the base and extends out of the bag body, the bag body is formed by three welded seams from a sheet, the bag body is assembled inside a container and the welding nozzle is accommodated at the opening of the container; The three welds include a first weld, a second weld and a third weld formed at both ends of the length of the first weld, the second weld forming the shoulder of the bag body to connect to the base, and the second weld and the third weld being perpendicular to each other.
2. The composite packaging structure according to claim 1, characterized in that, The welding nozzle has a connecting part that extends through the base to allow the contents of the bag to pass through. The base is formed as a three-dimensional structure that is fitted onto the shoulder of the bag. The vertical projection of the base is rhomboid, circular, or elliptical.
3. The composite packaging structure according to claim 2, characterized in that, The base is composed of a cylindrical body extending radially to both sides to form an extension, and the side of the extension away from the cylindrical body of the base forms a vertex angle of less than or equal to 90 degrees.
4. The composite packaging structure according to claim 3, characterized in that, The base is centrally located at the shoulder formed by the second weld on the bag body.
5. The composite packaging structure according to claim 4, characterized in that, The cylindrical body of the base and the extension integrally formed with the cylindrical body have two or more friction-enhancing stripes evenly distributed on their outer surfaces. The shoulder of the bag body forms a second weld and is attached to the friction-enhancing stripes.
6. The composite packaging structure according to claim 1, characterized in that, The sheet is optionally configured as a composite film, and the sheet has a main layer and a barrier layer.
7. The composite packaging structure according to claim 2, characterized in that, The connecting part is formed as a threaded section or a snap fastener.
8. The composite packaging structure according to claim 7, characterized in that, The outer surface of the container opening is formed with a threaded section.
9. The composite packaging structure according to claim 1, characterized in that, The container has vent holes.
10. The composite packaging structure according to claim 1, characterized in that, The first weld, the second weld, and the third weld all have reserved seams on the cavity side away from the bag body.