Paper cup

Abstract

The paper cup comprises an inner cup body, an outer cup body and an interlayer, and the inner cup body comprises an open water containing cavity; the outer cup is connected to the outer peripheral surface of the inner cup, the outer cup covers part of the outer peripheral surface of the inner cup, and the outer cup and the inner cup jointly define a spacing cavity between the outer cup and the inner cup; the interlayer is located in the spacing cavity, and the two ends, in the radial direction of the inner cup, of the interlayer abut against the outer cup and the inner cup respectively. According to the scheme, through the design of the partition cavity and the partition layer, the heat preservation and insulation performance of the paper cup is effectively improved, and meanwhile the structural stability of the paper cup is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of daily necessities, in particular to a paper cup. BACKGROUND

[0002] Disposable paper cups, as a widely used portable container, are mainly made of pulp base material and polyethylene (PE) waterproof film. Due to their light weight, low cost and recyclable characteristics, they play an important role in catering, office and public places.

[0003] However, the performance of disposable paper cups in the prior art still has significant defects, which are embodied in the following aspects: 1. The fiber structure and strength of paper itself are limited, which leads to the deformation of paper cups when they bear pressure. Especially after pouring hot water or other high-temperature liquids, the hardness of paper cups will further decrease, making them prone to tilt or deformation during use, and even causing liquid to spill. 2. The thermal conductivity of paper is relatively high, which means that heat can be quickly transferred through the paper cup to the outside, causing the hands to feel hot and even being scalded. Moreover, due to the poor heat insulation performance of paper cups, especially when containing very hot liquids, the temperature difference between the inside and outside of the cup is large, which can easily form condensation water on the cup wall, further reducing the heat insulation performance of the paper cup.

[0004] Therefore, the current paper cup has the problems of poor hardness and poor heat insulation effect, which will affect the user experience and safety in actual use. CONTENT OF THE INVENTION

[0005] Therefore, it is necessary to provide a paper cup to solve the problems of poor hardness and poor heat insulation effect of the current paper cup.

[0006] A paper cup, comprising an inner cup, an outer cup and a separation layer, the inner cup comprising an open water-containing cavity; the outer cup is connected to the outer circumferential surface of the inner cup, and covers part of the outer circumferential surface of the inner cup, the outer cup and the inner cup together form a spacing cavity between the outer cup and the inner cup; the separation layer is located in the spacing cavity, and the two ends of the separation layer in the radial direction of the inner cup abut against the outer cup and the inner cup respectively.

[0007] In one embodiment, the water-containing cavity is tapered in the direction towards the opening of the water-containing cavity, the inner cup has an internal side circumferential wall for defining the water-containing cavity, the internal side circumferential wall and the axial direction of the inner cup form an angle ∠A, the outer cup has an external side circumferential wall facing away from the inner cup, the external side circumferential wall and the axial direction of the inner cup form an angle ∠B, and the ∠A≠∠B.

[0008] In one embodiment, the angle difference between the ∠A and the ∠B is not greater than 2°.

[0009] In one of the embodiments, the inner cup has an inner circumferential wall for defining the water containing cavity, an angle between the circumferential wall and the axial direction of the inner cup is ∠A, the outer cup has an outer circumferential wall facing away from the inner cup, an angle between the outer circumferential wall and the axial direction of the inner cup is ∠B, and the ∠A> ∠B.

[0010] In one of the embodiments, the height of the outer cup in the axial direction is H, the height of the partition layer in the axial direction is h, and the 0.3H≤h.

[0011] In one of the embodiments, the height of the outer cup in the axial direction is H, the height of the partition layer in the axial direction is h, and the h≤0.8H.

[0012] In one of the embodiments, the partition layer is made of paper material.

[0013] In one of the embodiments, the partition layer has a wavy structure in the circumferential direction of the inner cup, the partition layer includes circumferentially continuous wave crests and wave troughs, the wave crests abut against the outer cup, and the wave troughs abut against the inner cup.

[0014] In one of the embodiments, the inner cup has a bottom wall and a side wall for defining the water containing cavity, the side wall has a ring structure, and the bottom wall is connected to the side wall, the outer cup covers part of the side wall on a side of the bottom wall facing away from the opening of the water containing cavity.

[0015] In one of the embodiments, the thickness of the outer cup is uniform, and the outer cup is provided with an upper roll-up mouth connected to the inner cup, the upper roll-up mouth is located at an end of the outer cup close to the opening of the water containing cavity in the axial direction of the inner cup, the upper roll-up mouth has a roll-up structure towards the inner cup, and a roll-up diameter of the upper roll-up mouth is greater than the thickness of the outer cup; and / or, the thickness of the outer cup is uniform, and the outer cup is provided with a lower roll-up mouth connected to the inner cup, the lower roll-up mouth is located at an end of the outer cup away from the opening of the water containing cavity in the axial direction of the inner cup, the lower roll-up mouth has a roll-up structure towards the inner cup, and a roll-up diameter of the lower roll-up mouth is greater than the thickness of the outer cup.

[0016] The paper cup provided in the above scheme, by setting the outer cup, the partition layer and the inner cup in sequence, not only improves the heat insulation performance of the paper cup through the interval cavity between the outer cup and the inner cup, but also supports the inner cup and the outer cup through the partition layer, thereby enhancing the structural stability of the paper cup, improving the hardness of the paper cup, avoiding deformation of the paper cup during use, and effectively solving the problems of easy deformation and poor heat insulation performance of the existing disposable paper cup. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is an exploded view of a paper cup according to an embodiment of the present application.

[0018] Figure 2 For Figure 1 A cross-sectional view of a paper cup.

[0019] Figure 3 For Figure 1 A cross-sectional view of a paper cup.

[0020] Figure 4 For Figure 1 A cross-sectional view of a paper cup.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 100, paper cup; 110, inner cup; 111, water containing cavity; 112, inner side peripheral wall; 113, bottom wall; 114, side wall; 120, outer cup; 121, outer side peripheral wall; 122, lower curled rim; 130, spacing cavity; 140, partition layer; 141, wave crest; 142, wave trough. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art, that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is therefore not limited to the specific embodiments disclosed below.

[0024] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, if there are terms such as "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Therefore, the features defined as "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0028] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and do not represent the only embodiment.

[0029] Referring to Figure 1 , Figure 1 An exploded structural schematic diagram of a paper cup 100 in an embodiment of the present application is shown. The paper cup 100 provided by the embodiment of the present application includes an inner cup 110, an outer cup 120 and a spacer layer 140. The inner cup 110 includes an open water containing cavity 111 for holding water. Exemplarily, the inner cup 110 is made of food-grade paper material, and the surface is coated with a waterproof coating to ensure that the water containing cavity 111 can hold liquid without leakage.

[0030] In combination Figure 2 shown, Figure 2The cross-sectional view of the paper cup 100 in an embodiment of the present application is shown. The outer cup 120 is connected to the outer circumferential surface of the inner cup 110. In the present embodiment, the outer cup 120 is also made of paper. The material of the outer cup 120 can be ordinary paper. Since the outer cup 120 does not directly contact the liquid, it mainly plays a role of heat insulation and aesthetics. The outer surface of the outer cup 120 can be printed with various patterns or characters to increase the aesthetics and identification of the paper cup 100.

[0031] As shown in Figure 2 , the outer cup 120 covers part of the outer circumferential surface of the inner cup 110. The outer cup 120 and the inner cup 110 jointly enclose a spacing cavity 130 between the outer cup 120 and the inner cup 110. In one embodiment, the inner cup 110 has a bottom wall 113 and a side wall 114 for defining a water containing cavity 111. The side wall 114 has a ring structure, and the bottom wall 113 is connected to the side wall 114. The outer cup 120 covers part of the side wall 114 on the side of the bottom wall 113 away from the opening of the water containing cavity 111.

[0032] As shown in Figure 2 , the spacing cavity 130 has a partition layer 140. The two ends of the partition layer 140 in the radial direction of the inner cup 110 abut against the outer cup 120 and the inner cup 110, respectively. The partition layer 140 can play a supporting role, thereby enhancing the structural stability of the paper cup 100, improving the hardness of the paper cup 100, and avoiding deformation of the paper cup 100 during use. It can be understood that the partition layer 140 can have a wavy structure as shown in Figure 3 , or a flat structure, without limitation, which can play a supporting role.

[0033] When the angle of the inner cup 110 of the paper cup 100 is equal to the angle of the outer cup 120, the theoretical contact point of the two paper cups 100 after being stacked together is that the outer surface of the inner paper cup 100 and the inner surface of the outer paper cup 100 completely fit. The larger the contact surface is, the greater the friction force generated is, thereby making the two paper cups 100 not easy to separate, i.e., the locking cup phenomenon.

[0034] In one embodiment, the water containing cavity 111 is gradually expanded in the direction toward the opening of the water containing cavity 111. The inner cup 110 has an inner side circumferential wall 112 for defining the water containing cavity 111. The included angle between the inner side circumferential wall 112 and the axial direction of the inner cup 110 is ∠A. The outer cup 120 has an outer side circumferential wall 121 away from the inner cup 110. The included angle between the outer side circumferential wall 121 and the axial direction of the inner cup 110 is ∠B, and ∠A≠∠B. The inner cup 110 and the outer cup 120 have slightly different expansion angles in the axial direction, thereby forming a wedge-shaped spacing cavity 130 between the inner cup 110 and the outer cup 120, which is gradually widened from the bottom to the top. This structural design helps to enhance the stability of the paper cup 100, and also facilitates the stacking and storage of the paper cup 100.

[0035] In one embodiment, the angle difference between ∠A and ∠B is not greater than 2°, which ensures that the spacing cavity 130 between the inner cup 110 and the outer cup 120 is not too wide, maintaining the overall aesthetics and structural stability of the paper cup 100.

[0036] In one embodiment, the inner cup 110 has an inner side wall 112 for defining the water containing cavity 111, the angle between the side wall and the axial direction of the inner cup 110 is ∠A, the outer cup 120 has an outer side wall 121 facing away from the inner cup 110, the angle between the outer side wall 121 and the axial direction of the inner cup 110 is ∠B, and ∠A > ∠B, as shown in Figure 4 When two paper cups 100 are stacked, the contact position of the two paper cups 100 is the bottom of the paper cup 100, forming a ring shape. However, a gap between the two paper cups 100 will appear above the paper cup 100, and the contact area between the two paper cups 100 is small, resulting in a small friction force, and thus the paper cups 100 will not be locked.

[0037] Correspondingly, in other embodiments, ∠A < ∠B, and when two paper cups 100 are stacked, the contact position of the two paper cups 100 is the top of the paper cup 100, forming a ring shape. However, a gap between the two paper cups 100 will appear below the paper cup 100, and the two paper cups 100 will not be locked.

[0038] In one embodiment, the height of the outer cup 120 in the axial direction is H, the height of the partition layer 140 in the axial direction is h, and 0.3H ≤ h. This avoids the partition layer 140 being too small. When the partition layer 140 is too small, the supporting surface of the outer cup 120 is small, and the paper cup 100 is easily deformed when held, resulting in poor heat insulation effect.

[0039] In one embodiment, the height of the outer cup 120 in the axial direction is H, the height of the partition layer 140 in the axial direction is h, and h ≤ 0.8H. This avoids the partition layer 140 being too large. When the partition layer 140 is too large, the outer cup 120 will be misaligned when being put on due to the deformation of the indentation on the partition layer 140, affecting the stacking of the paper cups 100, and it can ensure that the outer cup 120 completely covers the partition layer 140.

[0040] Preferably, the partition layer 140 is arranged at the middle position of the spacing cavity 130, so that the partition layer 140 can cover the main area where the user holds the paper cup 100, providing a good heat insulation effect. The height h of the partition layer 140 can be adjusted between 0.3H and 0.8H according to actual needs, to balance the heat insulation effect and material cost. For example, the paper cup 100 containing relatively cold drinks does not need too much heat insulation protection, as the user usually holds the middle and upper part of the paper cup 100, and the height h of the partition layer 140 can be selected in a lower range. When the paper cup 100 needs to contain very hot drinks, the height h of the partition layer 140 can be selected in a higher range to provide comprehensive heat insulation protection for the user.

[0041] In one embodiment, the partition 140 is made of paper material. Exemplarily, the partition 140 is made of corrugated paper.

[0042] Combination Figure 3 As shown, in one embodiment, the partition 140 has an undulating corrugated structure in the circumferential direction of the inner cup 110. The corrugated partition 140 also has good cushioning performance. When the paper cup 100 is squeezed by external force, the corrugated structure can absorb part of the pressure, protecting the inner cup 110 from deformation and improving the pressure resistance of the paper cup 100. At the same time, the corrugated structure also increases the overall strength of the partition 140, making the paper cup 100 more sturdy and durable. Moreover, when the partition has a corrugated structure, it also divides the partition cavity 130 into multiple small spaces. The air in these small spaces plays a good role in heat insulation, effectively preventing heat conduction and preventing users from burning their hands when holding hot drinks.

[0043] The wave-like structure of the partition layer 140 can have various variations, such as a sine wave, a triangular wave, or a trapezoidal wave. In this embodiment, a sine wave is used, as this waveform structure is simple, the manufacturing process is mature, and the cost is low. It is understood that the wave of the partition layer 140 can be a transverse wave or a wave similar to... Figure 3 The vertical wave shown is for illustrative purposes only and is not intended to be limiting.

[0044] like Figure 3 As shown, in one embodiment, the partition 140 includes circumferentially continuous crests 141 and troughs 142, with crests 141 abutting the outer cup 120 and troughs 142 abutting the inner cup 110. This corrugated structure of the partition 140 creates multiple small air cavities within the partition cavity 130, which effectively block heat transfer and provide excellent thermal insulation. The number of crests 141 and troughs 142 can be determined based on the diameter of the paper cup 100.

[0045] In one embodiment, the outer cup 120 has a uniform thickness and is provided with an upper rolled-up opening (not shown) connecting to the inner cup 110. The upper rolled-up opening is located at the end of the outer cup 120 that is axially close to the water-containing cavity 111 of the inner cup 110. The upper rolled-up opening has a structure that rolls up towards the inner cup 110. The upper rolled-up opening can prevent the edge of the paper cup 100 from being sharp, improving the safety and comfort of the user. Moreover, the rolling diameter of the upper rolled-up opening is greater than the thickness of the outer cup 120. The larger the diameter of the upper rolled-up opening, the larger the size of the spacer cavity 130 formed at the top, and the thicker the partition layer 140 that can be placed inside it. This not only enhances the structural strength of the upper part of the paper cup 100 and prevents the upper part of the paper cup 100 from deforming, but also provides better heat insulation. This is especially suitable for cases where ∠A < ∠B.

[0046] like Figure 2As shown, in one of the embodiments, the thickness of the outer cup 120 is uniform, and the outer cup 120 is provided with a lower curled edge 122 connected to the inner cup 110, which is located at one end of the outer cup 120 axially away from the opening of the water containing cavity 111 of the inner cup 110, and the lower curled edge 122 is curled towards the inner cup 110, which can improve the appearance of the paper cup 100 and make it look more delicate and beautiful. And the diameter of the curled lower edge 122 is larger than the thickness of the outer cup 120, the larger the diameter of the curled lower edge 122, the larger the size of the gap cavity 130 at the bottom, and the thicker the thickness of the spacer layer 140 that can be placed inside, which not only can enhance the structural strength of the bottom of the paper cup 100 to prevent deformation of the bottom of the paper cup 100, but also can have better heat insulation effect, especially suitable for the case of ∠A> ∠B.

[0047] The paper cup 100 provided in the above scheme, by setting the outer cup 120, the spacer layer 140 and the inner cup 110 in turn, not only improves the heat insulation performance of the paper cup 100 through the gap cavity 130 between the outer cup 120 and the inner cup 110, but also plays a supporting role by allowing the two ends of the wave-shaped spacer layer 140 to abut against the inner cup 110 and the outer cup 120 respectively, thereby enhancing the structural stability of the paper cup 100 and improving the hardness of the paper cup 100 to avoid deformation of the paper cup 100 during use. At the same time, the spacer layer 140 is arranged to divide the gap cavity 130 into multiple small spaces, and the air in these small spaces has good heat insulation effect, which can effectively prevent heat conduction and prevent the user from being scalded when holding hot drinks, effectively solving the problems of easy deformation and poor heat insulation performance of the existing disposable paper cup 100.

[0048] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, not all possible combinations of the technical features in the above embodiments are described, but as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the description.

[0049] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent application. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of the patent of the present application should be subject to the appended claims.

Claims

1. A paper cup, characterized in that, The paper cup comprises: an inner cup comprising an open water-containing cavity; an outer cup connected to the outer circumferential surface of the inner cup, and covering part of the outer circumferential surface of the inner cup, the outer cup and the inner cup jointly enclosing a spacing cavity between the outer cup and the inner cup; a partition layer located in the spacing cavity, and abutting against the outer cup and the inner cup at two ends in the radial direction of the inner cup.

2. The paper cup according to claim 1, characterized in that The water-containing cavity is tapered in the direction towards the opening of the water-containing cavity, the inner cup has an inner circumferential wall for defining the water-containing cavity, the angle between the inner circumferential wall and the axial direction of the inner cup is ∠A, the outer cup has an outer circumferential wall facing away from the inner cup, the angle between the outer circumferential wall and the axial direction of the inner cup is ∠B, and ∠A≠∠B.

3. A paper cup according to claim 2, characterised in that The angle difference between the ∠A and the ∠B is not greater than 2°.

4. The paper cup according to any one of claims 1 to 3, characterized in that The inner cup has an inner circumferential wall for defining the water-containing cavity, the angle between the inner circumferential wall and the axial direction of the inner cup is ∠A, the outer cup has an outer circumferential wall facing away from the inner cup, the angle between the outer circumferential wall and the axial direction of the inner cup is ∠B, and ∠A>∠B.

5. The paper cup according to claim 1, wherein The height of the outer cup in the axial direction is H, the height of the partition layer in the axial direction is h, and 0.3H≤h.

6. The paper cup according to claim 1 or 5, characterized in that The height of the outer cup in the axial direction is H, the height of the partition layer in the axial direction is h, and h≤0.8H.

7. The paper cup according to claim 1, wherein The partition layer is made of paper material.

8. The paper cup according to claim 1 or 7, characterized in that The partition layer has a wavy structure in the circumferential direction of the inner cup, the partition layer comprises circumferentially continuous wave crests and wave troughs, the wave crests abut against the outer cup, and the wave troughs abut against the inner cup.

9. The paper cup according to claim 1, wherein The inner cup has a bottom wall and a side wall for defining the water-containing cavity, the side wall has a ring structure, and the bottom wall is connected to the side wall, part of the side wall is covered by the outer cup on the side of the bottom wall facing away from the opening of the water-containing cavity.

10. The paper cup according to claim 1 or 9, characterized in that The thickness of the outer cup is uniform, and the outer cup is provided with an upper roll-over mouth connected to the inner cup, the upper roll-over mouth is located at one end of the outer cup in the axial direction of the inner cup close to the opening of the water-containing cavity, the upper roll-over mouth has a roll-over structure towards the inner cup, and the roll-over diameter of the upper roll-over mouth is greater than the thickness of the outer cup; and / or, the thickness of the outer cup is uniform, and the outer cup is provided with a lower roll-over mouth connected to the inner cup, the lower roll-over mouth is located at one end of the outer cup in the axial direction of the inner cup away from the opening of the water-containing cavity, the lower roll-over mouth has a roll-over structure towards the inner cup, and the roll-over diameter of the lower roll-over mouth is greater than the thickness of the outer cup.

Images