A closeable composite structure paper cup based on plant coating technology

Abstract

The utility model relates to paper vessel technical field, especially in kind of close composite structure paper cup based on plant coating technology, the utility model discloses inner layer cup body, outer edge, leakage prevention layer, outer layer cup body, cup bottom, cup bottom rim, support piece and close rim, and the outer edge is annular, and the outer edge upper port is connected with the outside wall upper portion of inner layer cup body as a whole, and the top of leakage prevention layer is connected with the lower port of outer edge as a whole, and the outer layer cup body top is connected with the edge wall outside of outer edge as a whole, and the interval is left between outer layer cup body and leakage prevention layer, and the arched surface of cup bottom upwards is bonded with the bottom end of inner layer cup body and outer layer cup body, and cup bottom rim is connected in the edge of cup bottom, and the design of the utility model passes through inner layer cup body as the first line of defense of bearing main body, and its core lies in that the independent leakage prevention layer is added, and it forms integral type structure between inner layer cup body, is especially used for intercepting any liquid that seeps from inner layer cup body.

Description

Technical Field

[0001] This utility model relates to the field of paper utensil technology, and in particular to a closable composite paper cup based on plant coating technology. Background Technology

[0002] Plant-based coated paper cups refer to paper cups with a thin, dense, functional coating formed by laminating or impregnating natural plant-derived polymer materials (such as polylactic acid PLA, starch-based materials, cellulose derivatives, etc.) onto the surface of their pulp substrate. This bio-based coating replaces the traditional polyethylene (PE) plastic film, effectively blocking liquids, preventing leakage, and repelling oil. Furthermore, because its raw materials are derived from renewable resources and possess biodegradability or compostability, it can be decomposed by microorganisms in specific environments after use and disposal, ultimately returning to nature. This significantly reduces the environmental burden, making it a green packaging solution that balances performance and environmental benefits.

[0003] However, existing paper cups often encounter the following problems during use:

[0004] (1) Traditional paper cups are made of only a single layer of material or a simple composite. This means that once the cup wall is squeezed and wrinkled during transportation, softened due to prolonged immersion in hot drinks, or if there are tiny flaws that are difficult to detect with the naked eye during the manufacturing process, even a micron-sized crack is enough to destroy the integrity of the entire container. The liquid will then seep out without any obstruction through this single barrier, not only wetting the user's hands and causing embarrassment and discomfort, but also leaving hard-to-clean stains on desks, car cup holders, or bags.

[0005] (2) The physical characteristic of traditional disposable paper cups—"once opened, there's no going back"—creates a huge gap in convenience and wastes resources. When users cannot finish their beverage immediately due to meetings, schedules, or feeling full, they face a dilemma: either force themselves to finish it or discard it. This directly leads to a large waste of beverages and the container itself, contradicting contemporary environmental protection principles. Even more inconvenient is that an opened paper cup is almost impossible to carry safely; any tilting or shaking will cause liquid to spill from the rim. This makes it impossible to safely place half-empty coffee or milk tea into a briefcase, backpack, or car cup holder, greatly limiting its practicality in mobile scenarios and failing to meet the dynamic and ever-changing needs of modern life. Utility Model Content

[0006] The main purpose of this invention is to provide a closable composite paper cup based on plant coating technology. My design solves at least one of the above problems to a certain extent.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A closable composite paper cup based on plant coating technology, comprising:

[0009] Inner cup body;

[0010] The outer edge is annular, and its upper end is integrally connected to the upper part of the outer side wall of the inner cup body;

[0011] A leak-proof layer, the top of which is integrally connected to the lower port of the outer connecting edge;

[0012] The outer cup body has its top end integrated with the outer edge wall of the outer connecting edge, and a gap is left between the outer cup body and the leak-proof layer.

[0013] The bottom of the cup has an arched wall, and the arched surface facing upwards is bonded to the bottom of the inner cup body and the bottom of the outer cup body.

[0014] The bottom rim of the cup is connected to the edge of the bottom of the cup.

[0015] Also includes:

[0016] A support plate is disposed below the bottom of the cup. The upper surface of each support plate is an arc-shaped surface that matches the shape of the bottom surface of the cup. The support plate is in contact with the bottom surface of the cup. The bottom surface of the support plate is a horizontal plane. A group of support plates are arranged in a radial circular array with the center of the bottom of the cup as the center.

[0017] The closed rim is a flexible cylindrical structure, and the bottom end of the closed rim is integrated with the rim of the inner cup body.

[0018] A plug-in interface is provided on the side wall of the closed opening;

[0019] An insert paper is inserted through the side wall of the closed edge, the inserted end of the insert paper extends to the inner wall of the closed edge, and the distance between the insert paper and the two insertion interfaces is equal.

[0020] The cross-section of the outer edge is a V-shaped structure, with its V-shaped opening facing the outer cup body.

[0021] The gap between the leak-proof layer and the outer cup body forms an annular heat-insulating gap.

[0022] The support piece has a hollowed-out section where it fits against the bottom of the cup.

[0023] The bottom of the leak-proof layer is flush with the bottom of the inner cup body and is integrally formed.

[0024] The bottom edge of the cup is turned outwards.

[0025] Compared with the prior art, the beneficial effects of this utility model are:

[0026] (1) Regarding the solution to the leakage problem, the design of this utility model uses the inner cup body as the first line of defense for the main body; its core lies in the addition of an independent leakage-proof layer, which forms an integrated structure with the inner cup body, specifically designed to intercept any liquid seeping from the inner cup body, acting as an absolutely reliable second line of defense; finally, the annular heat-insulating gap formed between the leakage-proof layer and the outer cup body acts as a dry, sealed "safety cavity," completely imprisoning any potentially leaking liquid inside, preventing it from contacting the user or the external environment. At the same time, the V-shaped outer rib acts as a structural hub, tightly connecting the inner and outer cup bodies with the leakage-proof layer, sharing the pressure and improving the overall rigidity and deformation resistance of the cup body, thus reducing the possibility of leakage due to compression damage from a structural perspective.

[0027] (2) Regarding the problem of inability to seal properly, this invention abandons the traditional approach of relying on an additional cup lid. Instead, it integrates a "comprehensive reusable closure structure based on a locking principle" into the cup opening. Users simply pinch the flexible cylindrical closure edge to fold and align the two inserts, then push the insert paper through like a latch to form a secure mechanical lock. This action converts the elasticity of the flexible material into a gripping force on the insert paper, achieving a self-tightening effect. This effectively resists the pressure of the internal liquid and external vibrations, ensuring that the cup will not leak even when tilted or shaken while closed. This mechanism not only makes it possible to safely carry leftover beverages after drinking, but also significantly enhances the product's practicality and environmental value through its intuitive, integrated design that requires no additional accessories. Attached Figure Description

[0028] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the specific embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof.

[0029] Figure 1 This is a schematic diagram of the overall shape of the present utility model.

[0030] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0031] Figure 3 This is a bottom view of the present invention.

[0032] Figure 4 This is a schematic diagram of the cup mouth of this utility model after it is closed.

[0033] The numbers in the diagram are: 1. Inner cup body; 2. Outer edge; 3. Leak-proof layer; 4. Outer cup body; 5. Cup bottom; 6. Cup bottom rim; 7. Support piece; 8. Closed rim; 9. Insertion interface; 10. Insertion paper piece. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] like Figure 1-4 As shown, this utility model provides a closable composite paper cup based on plant coating technology. The closable composite paper cup based on plant coating technology includes an inner cup body 1, an outer rib 2, a leak-proof layer 3, an outer cup body 4, a cup bottom 5, a cup bottom rim 6, a support piece 7, and a closing rim 8.

[0037] The outer rib 2 is annular, with its upper end integrated with the upper part of the outer wall of the inner cup body 1. The cross-section of the outer rib 2 is V-shaped, with its V-shaped opening facing the outer cup body 4. This is a key design element. It connects the inner cup body 1, the leak-proof layer 3, and the outer cup body 4, integrating the stress of each part of the cup into a unified whole. The V-shaped structure itself has high bending resistance, greatly enhancing the structural strength of the cup mouth and preventing deformation or collapse during use. The top of the leak-proof layer 3 is integrated with the lower end of the outer rib 2. The gap between the leak-proof layer 3 and the outer cup body 4 forms an annular heat-insulating gap. The bottom of the leak-proof layer 3 is flush with and integrally formed with the bottom of the inner cup body 1. The gap between the leak-proof layer 3 and the outer cup body 4 forms a closed annular "leak-proof cavity." Even if the inner cup body 1 completely fails, the liquid will be confined within this cavity, absolutely preventing leakage and protecting the user's hands and the table.

[0038] In this invention, the top of the outer cup body 4 is integrally connected to the outer side of the outer edge 2, and a gap is left between the outer cup body 4 and the leak-proof layer 3. As the outermost layer, the outer cup body 4 mainly serves a protective function, preventing the leak-proof layer 3 from being accidentally punctured and providing a clean and aesthetically pleasing outer surface. The wall of the cup bottom 5 is arched, and the arched surface of the cup bottom 5 is bonded to the bottom of the inner cup body 1 and the outer cup body 4. The arched structure is a classic load-bearing form, which can effectively disperse and convert the vertical pressure of the liquid above into tension in all directions, and transmit it to the inner cup body 1 and the outer cup body 4. The cup bottom rim 6 is connected to the edge of the cup bottom 5. The cup bottom rim 6 is in an upward outward flared state.

[0039] In this invention, support pieces 7 are disposed below the cup bottom 5. The upper surface of each support piece 7 is an arc-shaped surface that matches the shape of the bottom surface of the cup bottom 5, and the support piece 7 is in contact with the bottom surface of the cup bottom 5. The bottom surface of the support piece 7 is a horizontal plane, and a group of support pieces 7 are arranged in a radial circumferential array with the center of the cup bottom 5 as the center. A hollow part is formed at the contact point between the support piece 7 and the cup bottom 5. These support pieces 7 are closely attached to the arched cup bottom 5, which is equivalent to adding "ribs" to the arched structure, further enhancing the rigidity and compressive strength of the cup bottom 5 and preventing it from deforming under full load. The closing rim 8 is a cylindrical flexible structure, and the bottom end of the closing rim 8 is connected to the cup mouth of the inner cup body 1 as a whole. The closing rim 8 can be squeezed to change it from a circle into a folded "slit".

[0040] In this invention, the insertion interface 9 is formed on the side wall of the closing flange 8; the two insertion interfaces 9 are key components of the mechanical closure structure. When the closing flange 8 is folded, the two holes overlap, forming a channel for the insertion paper piece 10 to pass through. The insertion paper piece 10 passes through the side wall of the closing flange 8, with its through end extending to the inner wall of the closing flange 8, and the distance between the insertion paper piece 10 and the two insertion interfaces 9 is equal. After the insertion paper piece 10 is inserted into the overlapping insertion interfaces 9, it physically prevents the closing flange 8 from returning to its original shape due to elasticity.

[0041] It should be noted that the multi-stage suction cup assembly with adjustable steering designed in this utility model, when in use, injects liquid into the inner cup body 1 when the suction cup is started. The weight of the liquid is applied to the cup bottom 5. The arched structure of the cup bottom 5 distributes the pressure to the inner cup body 1, the outer connecting edge 2, and the outer cup body 4, ultimately borne by the entire cup structure. If the inner cup body 1 experiences slight leakage due to prolonged soaking or mechanical damage, the liquid will be blocked by the leak-proof layer 3. The gap between the leak-proof layer 3 and the outer cup body 4 forms a safe "leak-proof cavity," ensuring that the liquid does not come into contact with the user or contaminate the outside environment. When the cup is placed on a table, the horizontal bottom surface of the support piece 7 ensures stable contact. The arched structure of the cup bottom 5 and the cooperation of the support piece 7 provide excellent pressure resistance. After the user finishes drinking, they hold the cup body. The user pinches both sides of the closed rim 8 with their thumb and forefinger and squeezes inward. Due to its flexible nature, the closure rim 8 is forced to fold, causing the two insertion ports 9 on it to move closer together until they completely overlap. While maintaining the squeezed state, the user pushes the insert paper 10 forward with their other hand or other fingers of the same hand. The through end of the insert paper 10 moves accordingly, precisely inserting into the two overlapped insertion ports 9. The insert paper 10 acts like a pin, running horizontally through the folded closure rim 8, forming a sturdy mechanical lock. This locking structure resists the elastic force of the closure rim 8's own rebound, thus firmly fixing the cup mouth in the closed state. At this point, the mouth of the inner cup body 1 is completely sealed, and the liquid inside is safely sealed within, preventing leakage even if tilted or shaken slightly.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closable composite paper cup based on plant coating technology, characterized in that, include: Inner cup body (1); The outer edge (2) is annular, and the upper end of the outer edge (2) is connected to the upper part of the outer side wall of the inner cup body (1) as a whole; Leak-proof layer (3), the top end of the leak-proof layer (3) is connected to the lower port of the outer edge (2) as a whole; The outer cup body (4) has its top end connected to the outer side of the outer edge (2) as a whole, and there is a gap between the outer cup body (4) and the leak-proof layer (3); The bottom of the cup (5) has an arched wall, and the arched surface of the bottom of the cup (5) is bonded to the bottom of the inner cup body (1) and the bottom of the outer cup body (4). The bottom edge (6) of the cup is connected to the edge of the bottom (5).

2. The closable composite paper cup based on plant coating technology according to claim 1, characterized in that, Also includes: Support plate (7), the support plate (7) is disposed below the cup bottom (5), the upper surface of each support plate (7) is an arc surface that matches the bottom surface shape of the cup bottom (5), and the support plate (7) is in contact with the bottom surface of the cup bottom (5). The bottom surface of the support plate (7) is a horizontal plane. A group of support plates (7) are arranged in a radial circumferential array with the center of the cup bottom (5) as the center. The closed edge (8) is a cylindrical flexible structure, and the bottom end of the closed edge (8) is connected to the cup mouth of the inner cup body (1) as a whole; The insertion interface (9) is provided on the side wall of the closed edge (8); Insert a paper piece (10) through the side wall of the closed edge (8), the through end of the paper piece (10) extending to the inner wall of the closed edge (8), and the distance between the paper piece (10) and the two insertion ports (9) is equal.

3. A closable composite paper cup based on plant coating technology according to claim 1, characterized in that, The cross-section of the outer rib (2) is a V-shaped structure, and its V-shaped opening faces the outer cup body (4).

4. A closable composite paper cup based on plant coating technology according to claim 1, characterized in that, The gap between the leak-proof layer (3) and the outer cup body (4) forms an annular heat insulation gap.

5. A closable composite paper cup based on plant coating technology according to claim 2, characterized in that, The support piece (7) has a hollowed-out section at the point where it fits against the bottom of the cup (5).

6. A closable composite paper cup based on plant coating technology according to claim 1, characterized in that, The bottom end of the leak-proof layer (3) is flush with the bottom end of the inner cup body (1) and is integrally formed.

7. A closable composite paper cup based on plant coating technology according to claim 1, characterized in that, The bottom edge (6) of the cup is turned outwards.

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