A paper plastic cup

Abstract

The present invention provides a paper-plastic cup, which belongs to the technical field of paper cups. It solves the technical problem that it is inconvenient to observe the inner cup of the existing paper-plastic cup. The paper-plastic cup includes an inner cup made of transparent plastic and a cylindrical outer sleeve on the outer wall of the inner cup. The upper and lower ends of the cylindrical outer sleeve are respectively connected to the outer wall of the inner cup. There is a mutually connected heat-insulating gap between the middle part of the cylindrical outer sleeve and the outer wall of the inner cup. A plurality of strip holes connecting the heat-insulating gap and the outside are provided on the side wall of the cylindrical outer sleeve along the axial direction of the cylindrical outer sleeve. The strip holes are arranged in a straight line, and recesses protruding outward from the side wall of the cylindrical outer sleeve are provided between adjacent strip holes. The recesses are connected to the heat-insulating gap. This scheme adopts linearly arranged strip holes on the cylindrical outer sleeve to observe the inner cup, which can realize the observation of the inner cup from the side wall of the paper-plastic cup. On this basis, a better anti-scalding effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of paper cups and relates to a paper-plastic cup, in particular to a double-layer paper-plastic cup. Background Art

[0002] The paper-plastic cup is a double-layer disposable cup. The inner cup is made of plastic and can be widely used to fill various media. With the support of the outer paper jacket, it has a wide range of applications. Forming an insulating gap between the inner cup and the outer jacket is one of the solutions for double-layer paper-plastic cups to prevent scalding, and it is also the most widely used solution. Since the outer jacket needs to form an insulating gap with the inner cup, it needs to cover the entire inner wall periphery, so the paper-plastic cup cannot observe the remaining medium in the inner cup from the side.

[0003] Based on this double-layer paper-plastic cup anti-scalding solution, some improved anti-scalding solutions have also emerged, such as adding an insulation layer between the paper outer cover to further achieve heat insulation, and setting a support bar between the paper outer cover and the inner cup to prevent the outer cover from deforming and contacting the inner cup.

[0004] There is also a Chinese patent application with application number CN201620952834.7, which discloses an anti-scalding paper cup, including a cup wall, the cup wall including a base layer and an anti-scalding layer wrapped on the surface of the base layer, the anti-scalding layer is provided with convex patterns on the side away from the base layer, the convex patterns are in a corrugated structure and the convex patterns are evenly distributed around the cup wall. The convex patterns can be arranged so that when the hand holds the cup wall, there are multiple ventilation channels between the cup wall and the hand, so that the wind can flow on the cup wall where the hand holds, taking away some heat, reducing the temperature of the cup wall, and achieving the purpose of anti-scalding. In addition, the convex patterns can increase the thickness of the cup wall in contact with the hand, which can also further prevent scalding.

[0005] The solution is to use a ventilation channel that runs through the top and bottom to take away the heat on the cup wall, which can effectively solve the scalding problem. However, the situation inside the cup can only be observed from the cup mouth, and it is not easy to observe due to the influence of the gas coming out of the ventilation channel. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention provides a paper-plastic cup, which solves the technical problem of how to conveniently observe the inner cup condition of the paper-plastic cup.

[0007] The present invention is achieved through the following technical solutions: a paper-plastic cup, comprising an inner cup made of transparent plastic and a cylindrical outer sleeve on the outer side of the inner cup, the upper and lower ends of the cylindrical outer sleeve are respectively connected to the outer wall of the inner cup, and a mutually connected thermal insulation gap is provided between the middle part of the cylindrical outer sleeve and the outer wall of the inner cup. It is characterized in that a plurality of strip holes connecting the thermal insulation gap and the outside are provided on the side wall of the cylindrical outer sleeve along the axial direction of the cylindrical outer sleeve, the strip holes are arranged in a straight line, and a notch protruding outward from the side wall of the cylindrical outer sleeve is provided between adjacent strip holes, and the notch is connected to the thermal insulation gap.

[0008] This solution adopts linearly arranged strip holes on the cylindrical outer shell to observe the inner cup, and can realize the observation of the inner cup from the side wall of the paper plastic cup. On this basis, the linearly arranged strip holes are a plurality of strip holes arranged along the axial direction, and outwardly protruding notches are set between adjacent strip holes. This structure is used to achieve rapid heat dissipation in the middle and lower part of the paper plastic cup, because after the heat medium of the air cup and the inner cup in the heat-insulating gap is heated, hot air will flow upward along the inner cup wall. The closer to the inner cup wall, the faster the flow, forming a low-pressure area, and the part close to the notch is blocked due to the uneven surface and far away from the inner cup. When the outside is relatively cold, Air flows into cold air from the bottom strip holes of the linearly arranged strip holes, and the inflowing cold air can dynamically replace the hot air in the middle and lower parts of the insulation gap and the air near the notch. The fresh cold air state of this part achieves a better anti-scalding effect. After the hot air gathers at the upper part, it flows out from the top or middle strip holes of the linearly arranged strip holes. Through the linearly arranged strip holes, not only can convection air be formed to dynamically replace the hot air in the middle and lower parts of the insulation gap and the air near the notch, but the inner cup situation can also be seen from the side when holding the middle and lower part, and the heat situation can be predicted from the top strip holes of the linearly arranged strip holes.

[0009] As an improvement, in the above-mentioned paper-plastic cup, the upper and lower ends of the cylindrical outer shell are provided with an inwardly folded upper flange and a lower flange, and the upper flange and the lower flange are fixedly connected to the outer wall of the inner cup, and a heat storage cavity with a closed top is formed between the upper inner wall of the cylindrical outer shell, the upper flange and the inner cup wall. This structure enables the inner cup to reduce the loss of heat from the upper part.

[0010] As an improvement, the upper flange includes a horizontal flange and a vertical flange, and the vertical flange is bonded to the inner cup wall, forming the inner wall of the cylindrical outer jacket of the heat storage cavity, which has an outwardly protruding annular notch. It is used to maintain the heat of the upper part, and the structure of the notch can make the hot air form a backflow, and it is not easy to flow out from the upper strip hole, so as to achieve the effect of hot air overflowing after the heat storage cavity is full.

[0011] As an improvement, the number of the linearly arranged strip-shaped holes is one or two symmetrical ones.

[0012] As an improvement, the cylindrical outer cover is made of paper material.

[0013] As an improvement of the alternative product, the side wall of the inner cup is a straight tube side wall, and the cylindrical outer shell is conical, with the diameter of the upper end larger than that of the lower end. Increasing the thermal insulation gap and the straight tube side wall can accelerate the flow of hot air and prevent the obstruction of air flow on the outer wall of the inner cup.

[0014] Compared with the prior art, this paper-plastic cup has the following advantages:

[0015] The paper-plastic cup adopts linearly arranged strip holes, which not only makes it easy to see the situation inside the cup, but also realizes air flow effect through the structure. The cooperation of the strip holes and the notches allows fresh cold air to be maintained in the middle and lower parts, thereby enhancing the anti-scalding effect. In addition, a heat storage structure is arranged in the upper part, so that the heat retained in the upper part is not easily lost, and the hot drink can be kept for a longer time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the paper-plastic cup.

[0017] Figure 2 It is a schematic diagram of the main structure of the paper-plastic cup.

[0018] Figure 3 yes Figure 2 The cross-sectional view of AA and the schematic diagram of the air flow state structure.

[0019] In the figure, 1, inner cup; 2, cylindrical outer cover; 21, upper flange; 22, lower flange; 3, strip hole; 4, thermal insulation gap; 5, notch; 6, heat storage cavity. DETAILED DESCRIPTION

[0020] The present invention will be further described below in the form of embodiments in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the paper-plastic cup comprises an inner cup 1 made of transparent plastic and a cylindrical outer cover 2 sleeved outside the inner cup 1. The inner cup 1 and the cylindrical outer cover 2 form a double-layer anti-scalding structure. On this basis, linearly arranged strip holes 3 are provided to observe the condition of the inner cup 1, and suitable air convection is formed through one or two rows of linearly arranged strip holes 3 and other structures, so that the upper part of the paper-plastic cup can maintain heat, and the middle and lower parts improve the anti-scalding effect. The details are as follows:

[0023] The inner cup 1 is made of transparent plastic such as PP or PE, and its shape can be a general cup body with a taper.

[0024] The cylindrical outer sleeve 2 is made of paper material, and has a curling structure at both ends to increase the distance from the wall of the inner cup 1. The curling structure is connected to the outer wall of the inner cup 1, so that the middle part of the cylindrical outer sleeve 2 and the outer wall of the inner cup 1 have a mutually connected thermal insulation gap 4. The side wall of the cylindrical outer sleeve 2 is provided with a plurality of strip holes 3 connecting the thermal insulation gap 4 and the outside along the axial direction of the cylindrical outer sleeve 2. The strip holes 3 are arranged in a straight line. In this example, the number of the linearly arranged strip holes 3 is two symmetrical ones. A notch 5 protruding outward from the side wall of the cylindrical outer sleeve 2 is provided between adjacent strip holes 3, and the notch 5 is connected to the thermal insulation gap 4. The notch 5 can be made into a ring arranged along the circumferential direction, which can help increase the strength of the cylindrical outer sleeve.

[0025] The curling edges at the upper and lower ends of the cylindrical outer shell 2 are formed into an upper flange 21 and a lower flange 22 folded inward, and the upper flange 21 and the lower flange 22 are both fixedly connected to the outer wall of the inner cup 1, and a heat storage cavity 6 with a closed top is formed between the upper inner wall of the cylindrical outer shell 2, the upper flange 21 and the inner cup wall. The heat storage cavity 6 enables the inner cup 1 to reduce the loss of heat from the upper part.

[0026] In order to maintain the heat of the upper part, the upper flange 21 includes a horizontal flange and a vertical flange, and the vertical flange is bonded to the wall of the inner cup 1, and the inner wall of the cylindrical outer shell 2 forming the heat storage cavity 6 has an outwardly protruding annular notch 5. The structure of the notch 5 allows the hot air to form a backflow, and it is not easy to flow out from the upper strip hole 3, so as to achieve the effect of hot air overflowing after the heat storage cavity 6 is full.

[0027] When using this product, pour 100℃ hot water or hot drinks into it. Figure 2 As described above, the strip holes 3 are rotated to a position where they can be observed, and the inner cup 1 is observed through the linearly arranged strip holes 3 provided on the outer sleeve, such as Figure 3 As shown in the airflow state on the left, heat exchange occurs between the hot water in the inner cup 1 and the air in the insulating gap 4 outside the inner cup 1. After the insulating gap 4 is heated, hot air will flow upward along the wall of the inner cup 1. The closer to the wall of the inner cup 1, the faster the flow. As indicated by the longer arrow, a low-pressure area is formed, and the part close to the notch 5 forms a blocking state due to the uneven surface and the distance from the inner cup 1. The shorter arrow indicates that when the relatively cold air from the outside flows into the cold air from the bottom strip hole 3 of the linearly arranged strip holes 3, the cold air flowing in can dynamically replace the hot air in the middle and lower part of the insulating gap 4 and the air near the notch 5. The fresh cold air state of this part achieves a better anti-scalding effect. After the hot air gathers at the upper part, it flows out from the top or middle strip hole 3 of the linearly arranged strip holes 3. Through the linearly arranged strip holes 3 and the notch 5 between the strip holes 3, not only can convection air be formed to dynamically replace the hot air in the middle and lower part of the insulating gap 4 and the air near the notch 5.

[0028] Embodiment 2:

[0029] The content of Example 2 is basically the same as that of Example 1, except for the shape of the inner cup 1. In this example, the side wall of the inner cup 1 is a straight cylindrical side wall, and the cylindrical outer shell 2 is tapered, with the diameter of the upper end larger than that of the lower end. Increasing the thermal insulation gap 4 and the straight cylindrical side wall can accelerate the flow of hot air and prevent the obstruction of the air flow on the outer wall of the inner cup 1.

[0030] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A paper-plastic cup, comprising an inner cup (1) made of transparent plastic and a cylindrical outer cover (2) sleeved outside the inner cup (1), wherein the upper and lower ends of the cylindrical outer cover (2) are respectively connected to the outer wall of the inner cup (1), and a heat-insulating gap (4) is provided between the middle part of the cylindrical outer cover (2) and the outer wall of the inner cup (1), characterized in that: A plurality of strip holes (3) are provided on the side wall of the cylindrical outer sleeve (2) along the axial direction of the cylindrical outer sleeve (2) to connect the heat insulating gap (4) and the outside world. The strip holes (3) are arranged in a straight line. A notch (5) protruding outward from the side wall of the cylindrical outer sleeve (2) is provided between adjacent strip holes (3). The notch (5) is connected to the heat insulating gap (4). The upper and lower ends of the cylindrical outer sleeve (2) are provided with an inwardly folded upper flange (21) and a lower flange (22). The upper flange (21) and the lower flange (22) are both fixedly connected to the outer wall of the inner cup (1). A heat storage cavity (6) with a top closed is formed between the upper inner wall of the cylindrical outer sleeve (2), the upper flange (21) and the wall of the inner cup (1). The inner wall of the cylindrical outer sleeve (2) of the heat storage cavity (6) has a notch (5) protruding outward.

2. The paper-plastic cup according to claim 1, characterized in that: The upper flange (21) comprises a horizontal flange and a vertical flange, and the vertical flange is bonded to the wall of the inner cup (1).

3. The paper-plastic cup according to claim 2, characterized in that: The number of the linearly arranged strip-shaped holes (3) is one or two symmetrical ones.

4. The paper-plastic cup according to claim 3, characterized in that: The notch (5) forms a ring shape along the circumference.

5. The paper-plastic cup according to claim 2, characterized in that: The cylindrical outer shell (2) is made of paper material.

6. The paper-plastic cup according to claim 1, characterized in that: The side wall of the inner cup (1) is a straight cylindrical side wall, and the cylindrical outer sleeve (2) is conical, with the diameter of the upper end being larger than that of the lower end.

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