Cap structure, bottle body and production line for manufacturing cap structure

Abstract

The utility model relates to liquid food packaging technical field provides a cover body structure, bottle body and be used for preparing cover body structure's production line, the utility model discloses: substrate layer, the surface is provided with microstructure, super water repellent coating is arranged in the one side surface of substrate layer with microstructure, and at least partial or all covers microstructure, wherein, microstructure is the micro pattern and / or three -dimensional body of setting in substrate layer surface, the utility model discloses the surface preparation microstructure of substrate layer, and set up super water repellent coating on the microstructure surface, and super water repellent coating and microstructure intercalate each other, make the combination between substrate layer and super water repellent coating more closely, increase the fastness degree of super water repellent coating on the surface of substrate layer, avoid falling off because of external force, have higher wear resistance and pressure reduction, wherein, microstructure includes two forms of micro pattern and three -dimensional body, can satisfy the use demand of different packaging material.

Description

[0001] This application claims priority to Chinese Patent Application No. 2024233031137, filed on December 31, 2024, entitled "Lid Structure, Cup Body and Production Line for Preparing Lid Structure". The entire contents of the above application are incorporated herein by reference. Technical Field

[0002] This utility model relates to the field of liquid food packaging technology, and in particular to a cap structure, a bottle body, and a production line for preparing the cap structure. Background Technology

[0003] Currently, liquid foods sold on the market commonly use packaging such as plastic composite packaging, aluminum-plastic composite packaging, and aluminized composite packaging. Liquid foods, especially viscous ones, tend to stick to the packaging walls when consumed, resulting in a large amount of food residue remaining on the inner wall and being unable to be poured out, leading to food waste. Taking yogurt products as an example, most consumers and businesses have noticed the waste caused by yogurt sticking to the inner wall of the packaging, so most businesses are trying to find solutions to this problem.

[0004] Currently, commercially available non-stick aluminum-plastic composite cap films commonly employ a technique of spraying or roller-coating a non-stick coating liquid onto the inner wall of the packaging. These non-stick coatings typically utilize superhydrophobic surface technology with micro-nano rough structures. Air is trapped within these nanoscale rough structures, causing droplets on these superhydrophobic surfaces to contact the solid-air composite interface, making the droplets easily roll off. However, this nanoscale rough structure is easily damaged by mechanical wear. Furthermore, this structure cannot achieve complete non-stick performance for specially formulated viscous liquids; the non-stick coating is prone to detachment after external impact, leading to a failure of the non-stick effect. Utility Model Content

[0005] This utility model provides a cap structure, a bottle body, and a production line for preparing the cap structure, in order to solve the technical problem in the prior art that the hydrophobic layer on the surface of liquid food packaging materials is not firmly bonded to the base layer, which makes it easy to fall off and thus affects the non-stick effect.

[0006] This utility model provides a cover structure, including:

[0007] The substrate layer has microstructures on its surface;

[0008] A superhydrophobic coating is disposed on one side surface of the substrate layer having the microstructure, and at least partially or completely covers the microstructure;

[0009] The microstructure is a micro-pattern and / or a three-dimensional body disposed on the surface of the substrate layer.

[0010] According to the cover structure provided by this utility model, the micro-pattern includes:

[0011] Linear pattern, wherein the linear pattern is composed of multiple spaced straight lines and / or curves;

[0012] The graphic pattern is composed of multiple intersecting lines.

[0013] According to the cover structure provided by this utility model

[0014] The micro-pattern is any one or a combination of straight-line patterns, curved patterns, and diamond-shaped patterns.

[0015] According to the cover structure provided by this utility model, the three-dimensional body is a regularly arranged three-dimensional body.

[0016] According to the cover structure provided by this utility model

[0017] The regularly arranged three-dimensional volume consists of micro-protrusions;

[0018] The shape of the micro-protrusions protruding from the surface of the substrate layer is one or a combination of several of the following: pyramidal, frustum, prism, cylinder, and cone.

[0019] The height of the micro-protrusions is between 1 nm and 2 mm, and the spacing between the micro-protrusions is between 1 nm and 1 mm.

[0020] According to the cover structure provided by this utility model

[0021] The regularly arranged three-dimensional volume consists of micro-pits;

[0022] The micro-pits recessed into the surface of the substrate layer are in the shape of one or a combination of several of the following: pyramidal, frustum, prism, cylinder, and cone.

[0023] The depth of the micro-pits is between 1 nm and 2 mm, and the spacing between the micro-pits is between 1 nm and 1 mm.

[0024] According to the cover structure provided by this utility model

[0025] The three-dimensional volume is an irregularly arranged three-dimensional volume.

[0026] According to the cover structure provided by this utility model, the irregularly arranged three-dimensional bodies include:

[0027] An irregularly shaped protrusion protruding from the surface of the substrate layer, and / or an irregularly shaped recessed structure sinking into the surface of the substrate layer.

[0028] According to the cover structure provided by this utility model, an adhesive layer is also included; the adhesive layer is disposed between the substrate layer and the superhydrophobic coating.

[0029] The thickness of the adhesive layer is less than the spatial thickness of the microstructure.

[0030] According to the cover structure provided by this utility model

[0031] The thickness of the superhydrophobic coating is greater than the spatial thickness of the microstructure.

[0032] According to the cover structure provided by this utility model

[0033] The contact angle between the surface of the superhydrophobic coating away from the microstructure and the liquid medium is greater than 160°, and / or the roll-off angle of the liquid medium on the superhydrophobic coating is less than 5°.

[0034] This utility model also provides a bottle body, including a cup body and the above-mentioned cap structure; the cap structure is disposed at the mouth of the cup body.

[0035] According to the present invention, a bottle body is provided.

[0036] A guide groove is formed circumferentially on the inner side of the cup opening of the cup body, and a protrusion for cooperating with the guide groove is provided on the side of the lid structure near the cup opening.

[0037] This utility model also provides a production line for manufacturing the above-mentioned cover structure;

[0038] The production line includes an unwinding section, a preheating section, an imprinting section, a tensioning section, and a rewinding section arranged in sequence.

[0039] The imprinting section is used to prepare the microstructure on the substrate layer.

[0040] According to the production line provided by this utility model, the imprinting section includes at least a rubber roller and a pattern roller;

[0041] The surface of the flower roller is provided with an embossing structure;

[0042] The surfaces of the rubber roller and the pattern roller are pressed together to imprint the substrate layer to prepare the microstructure.

[0043] According to the production line provided by this utility model, a cooling section is further included, which is disposed between the imprinting section and the tensioning section, and is used to cool the substrate layer on which the microstructure is prepared.

[0044] The cap structure, bottle body, and production line for preparing the cap structure provided by this utility model are achieved by preparing microstructures on the surface of the substrate layer and setting a superhydrophobic coating on the surface of the microstructures. The superhydrophobic coating and the microstructures are interlocked, making the bond between the substrate layer and the superhydrophobic coating tighter, increasing the firmness of the superhydrophobic coating on the surface of the substrate layer, preventing it from falling off due to external forces, and having higher wear resistance and pressure reduction. The microstructures include two forms: micro-patterns and three-dimensional bodies, which can meet the needs of different packaging materials. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a side sectional view of the cover structure provided by this utility model;

[0047] Figure 2 This is an example of the micro-pattern provided by this utility model. Figure 1 ;

[0048] Figure 3 This is an example of the micro-pattern provided by this utility model. Figure 2 ;

[0049] Figure 4 This is an example of the micro-pattern provided by this utility model. Figure 3 ;

[0050] Figure 5 This is an example of the micro-pattern provided by this utility model. Figure 4 ;

[0051] Figure 6 This is an example diagram of the micro-protrusions provided by this utility model;

[0052] Figure 7 This is an example diagram of the micro-pits provided by this utility model;

[0053] Figure 8 This is a planar schematic diagram of an irregularly arranged three-dimensional body provided by this utility model;

[0054] Figure 9 This is a three-dimensional schematic diagram of an irregularly arranged three-dimensional body provided by this utility model;

[0055] Figure 10 This is a structural diagram of the bottle body provided by this utility model;

[0056] Figure 11This is a schematic diagram of the production line provided by this utility model;

[0057] Figure 12 This is a schematic diagram of the internal structure of the flower roller provided by this utility model.

[0058] Figure label:

[0059] 1: Substrate layer; 11: Microstructure; 12: Protrusion; 111: Micropattern; 112: Micro-protrusion; 113: Micro-dimple; 2: Superhydrophobic coating; 3: Adhesive layer; 4: Cup body; 41: Guide groove; 51: Unwinding section; 52: Preheating section; 53: Imprinting section; 531: Rubber roller; 532: Pattern roller; 54: Tensioning section; 55: Rewinding section; 56: Cooling section. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0061] The following is combined with Figures 1-12 This invention describes the cap structure, bottle body, and production line for preparing the cap structure.

[0062] Figure 1 This is a side sectional view of the cover structure provided by this utility model, as shown below. Figure 1 As shown, this utility model provides a cover structure, including: at least two layers; a substrate layer 1 with microstructures 11 on its surface; and a superhydrophobic coating 2 disposed on the side of the substrate layer 1 with the microstructures 11. The superhydrophobic coating 2 can be made of nanomaterials and is composed of nanoscale solid particles. The superhydrophobic coating 2 at least partially or completely covers the microstructures 11. The superhydrophobic coating 2 and the microstructures 11 are interlocked, making the bond between the substrate layer 1 and the superhydrophobic coating 2 tighter, increasing the firmness of the superhydrophobic coating 2 on the surface of the substrate layer 1, preventing it from falling off due to external force, and having higher wear resistance and pressure reduction. The microstructures 11 are micro-patterns 111 and / or three-dimensional bodies disposed on the surface of the substrate layer 1. The microstructures 11 are formed by special processing.

[0063] Figures 2-5 This is an example diagram of the micro-pattern provided by this utility model, such as... Figures 2-5As shown, according to an embodiment of the present invention, a cover structure with micro-patterns 111 includes: linear patterns, which are composed of multiple spaced straight lines and / or curves; and graphic patterns, which are composed of multiple intersecting lines. The micro-patterns 111 can be any one or a combination of straight lines, curved lines, and diamond patterns. The micro-patterns 111 are provided to correspond to some cover structures with special requirements, or simply to provide an irregular or regularly arranged texture to obtain a rougher surface, thereby increasing the contact area with the superhydrophobic coating 2 and enhancing the bonding strength.

[0064] Figure 6 This is an example diagram of the micro-protrusions provided by this utility model, such as... Figure 6 As indicated, according to another embodiment of the present invention, a cover structure is provided, wherein the regularly arranged three-dimensional bodies are micro-protrusions 112; the shape of the micro-protrusions 112 protruding from the surface of the substrate layer 1 is one or a combination of several of the following: a pyramid, a frustum, a prism, a cylinder, and a cone; wherein the height of the micro-protrusions 112 is between 1 nm and 2 mm, and the spacing between the micro-protrusions 112 is between 1 nm and 1 mm.

[0065] Figure 7 This is an example diagram of the micro-pits provided by this utility model, such as... Figure 7 As shown, according to another embodiment of the present invention, a cover structure is provided, in which regularly arranged three-dimensional bodies are micro-pits 113; the shape of the micro-pits 113 recessed into the surface of the substrate layer 1 is one or a combination of several of the following: a pyramid, a frustum, a prism, a cylinder, and a cone; wherein, the depth of the micro-pits 113 is between 1 nm and 2 mm, and the spacing between the micro-pits 113 is between 1 nm and 1 mm; and the diameter of the solid particles in the superhydrophobic coating 2 should be smaller than the pore size and depth of the micro-pits 113, so as to avoid the solid particles directly filling the pits and failing to play the role of coupling and fixing the superhydrophobic coating 2 and the substrate layer 1.

[0066] Understandably, the presence of micro-protrusions 112 or micro-pits 113 provides space for the superhydrophobic coating 2 to embed, forming a mechanical anchoring structure. The greater the spatial thickness of the microstructure 11, the deeper the embedding, the stronger the physical interlocking, and the stronger the ability to resist shear forces parallel to the surface (such as scratching and friction). The spacing of the microstructures 11 determines the distribution density; the smaller the spacing, the higher the distribution density, the more anchoring points the superhydrophobic coating 2 can embed within a unit area, and the stronger the overall bonding force. The spatial thickness and spacing of the microstructures work together to determine the morphology and bonding strength of the interface between the superhydrophobic coating 2 and the substrate layer 1. By rationally designing the depth and spacing, the mechanical interlocking effect can be maximized, making the coating less prone to peeling or detaching from the substrate even when subjected to external forces (such as transportation vibration, consumer squeezing of packaging, or washing by contents).

[0067] Figure 8 This is a planar schematic diagram of an irregularly arranged three-dimensional body provided by this utility model. Figure 9 This is a three-dimensional schematic diagram of an irregularly arranged three-dimensional body provided by this utility model; for example... Figure 8-9 As shown, the three-dimensional bodies are irregularly arranged, including: irregularly shaped protrusions extending from the surface of the substrate layer 1, and / or irregularly shaped recesses recessed from the surface of the substrate layer 1. Figure 9 The microstructure of an irregular three-dimensional object, as seen from an angle of approximately 45° upwards, is exemplified, showcasing multiple irregularly arranged protrusions and depressions.

[0068] like Figure 1 As shown, a cover structure provided according to an embodiment of the present invention further includes an adhesive layer 3; the adhesive layer 3 is disposed between the substrate layer 1 and the superhydrophobic coating 2;

[0069] Specifically, the adhesive layer 3 can be a finished layer that is directly bonded to the surface of the substrate layer 1, or it can be applied by coating method, first brushing or spraying adhesive liquid onto the surface of the substrate layer 1 as the adhesive layer 3, and then coating the surface of the adhesive layer 3 with a superhydrophobic coating 2.

[0070] Furthermore, the thickness of the adhesive layer 3 must be less than the spatial thickness of the microstructure 11, where the spatial thickness of the microstructure 11 refers to the height of the micro-protrusions 112 or the depth of the micro-pits 113. As the adhesive layer 3 that bonds the substrate layer 1 and the superhydrophobic coating 2, it plays an adhesive role and cannot be too thick. In particular, the thickness cannot exceed the height of the micro-protrusions 112 or the depth of the micro-pits 113, otherwise it will fill the microstructure 11, causing the bonding surface between the superhydrophobic coating 2 and the adhesive layer 3 to become a plane. The coupling and fixing effect between the superhydrophobic coating 2 and the substrate layer 1 will be greatly reduced. If it is fixed by the adhesive force of the adhesive layer 3 alone, its firmness, wear resistance and compressive strength will also decrease.

[0071] According to the embodiment of the present invention, the thickness of the superhydrophobic coating 2 is greater than the spatial thickness of the microstructure 11, which can ensure the stability of the coupling effect between the superhydrophobic coating 2 and the microstructure 11; that is, the superhydrophobic coating 2 does not need to conform to the surface of the microstructure 11, because the hydrophobic function of the cover structure does not come from the microstructure 11, but from the superhydrophobic coating 2.

[0072] According to an embodiment of the present invention, the superhydrophobic coating 2 has a contact angle of more than 160° between the surface away from the microstructure 11 and the liquid medium, and / or the rolling angle of the liquid medium on the superhydrophobic coating 2 is less than 5°, thereby satisfying the non-stick properties of the liquid medium, especially viscous liquids such as yogurt.

[0073] The cover structure of this utility model is provided in Embodiment 1.

[0074] Example 1

[0075] A cover structure comprises two or more layers, including a substrate layer 1 and a superhydrophobic coating 2. The thickness of the substrate layer 1 is greater than 20 μm, and the microstructure 11 on the surface of the substrate layer 1 is designed as micro-pits 113, specifically as continuously distributed inverted pyramids; wherein, the inverted pyramid structure has at least three edges or more; the side length of the inverted pyramid ranges from 1 nm to 1 mm, the height of the inverted pyramid microstructure 11 is less than the thickness of the substrate layer 1, the depth of the inverted pyramid is 1 nm to 2 mm, and the spacing between the continuous inverted pyramids is 1 nm to 1 mm; when the angle between the sidewall and the bottom surface of the inverted pyramid is greater than 90°, the angle is preferably 120° ± 5°.

[0076] The superhydrophobic coating 2 completely fills and adheres to the substrate layer 1, and the superhydrophobic coating 2 is in direct contact with the liquid medium; the superhydrophobic coating 2 completely fills the unit voids of the inverted pyramid.

[0077] The maximum thickness of the superhydrophobic coating 2 is greater than the depth of the inverted pyramid. After the superhydrophobic coating 2 completely fills the inverted pyramid, the thickness of the remaining part is >1nm and is higher than the bottom surface of the pyramid, thus achieving the purpose of completely covering the microstructure 11 of the inverted pyramid.

[0078] The superhydrophobic coating 2 is composed of superhydrophobic microparticles with a particle size ranging from 1 nm to 100 μm; to avoid safety risks, the particle size of the superhydrophobic coating 2 is preferably above 500 nm.

[0079] Figure 10 This is a structural diagram of the bottle body provided by this utility model, as shown below. Figure 10 As shown, this utility model also provides a bottle body, including a cup body 4 and the above-mentioned lid structure; the lid structure is disposed at the mouth of the cup body 4, and the edge of the lid structure is sealed and fixed to the mouth of the cup. The cup body 4 can be used to hold liquid foods such as yogurt. Due to the use of the lid structure, the liquid food inside has a non-stick effect.

[0080] According to an embodiment of the present invention, a bottle body is provided, wherein a guide groove 41 is formed circumferentially on the inner side of the cup mouth of the cup body 4, and a protrusion 12 is provided on the side of the cap structure near the cup mouth for cooperating with the guide groove 41. The protrusion 12 cooperates with the guide groove 41 to facilitate the installation of the cap structure.

[0081] Figure 11 This is a schematic diagram of the production line provided by this utility model, as shown below. Figure 11As shown, this utility model also provides a production line for preparing the above-mentioned cover structure; the production line includes an unwinding section 51, a preheating section 52, an imprinting section 53, a tensioning section 54, and a winding section 55 arranged in sequence.

[0082] The imprinting section 53 is used to prepare the microstructure 11 on the substrate layer 1.

[0083] According to an embodiment of the present invention, a production line further includes a cooling section 56, which is disposed between the imprinting section 53 and the tensioning section 54, and is used to cool the substrate layer 1 on which the microstructure 11 is prepared. Specifically, the cooling section 56 may employ one or more cooling rollers to perform multi-stage cooling on the substrate layer 1. In order to improve the cooling efficiency, multiple holes for blowing cold air can be opened on the surface of the cooling rollers.

[0084] like Figure 11 As shown, according to a production line provided by this utility model, the embossing section 53 includes at least a rubber roller 531 and a pattern roller 532; the surface of the pattern roller 532 is provided with an embossing structure; the surface of the rubber roller 531 and the surface of the pattern roller 532 are pressed together to emboss the substrate layer 1 to prepare the microstructure 11.

[0085] Figure 12 This is a schematic diagram of the internal structure of the flower roller provided by this utility model, as shown below. Figure 12 As shown, specifically, the pattern roller 532 includes a roller body, the surface of which is provided with an embossing structure for preparing the microstructure 11 on the surface of the substrate layer 1, and ventilation holes are evenly distributed on the embossing structure; the inside of the roller body is provided with a receiving cavity, and a supporting structure is provided in the receiving cavity; the supporting structure divides the receiving cavity into a first space, a second space, a third space and a fourth space along the circumference of the roller body; wherein, the first space corresponds to the heating area on the surface of the roller body; the second space corresponds to the negative pressure area on the surface of the roller body; the third space corresponds to the cooling area on the surface of the roller body; and the fourth space corresponds to the demolding area on the surface of the roller body.

[0086] Furthermore, the flower roller 532 also includes a heating unit, a negative pressure unit, and a demolding unit; the heating unit is disposed on the support structure and located in the first space, and is used to heat the heating area; the heating unit can use uniformly distributed electric heating rods or electric heating wires to heat the roller surface step by step and quickly, so as to ensure that the roller surface can be heated to the preset temperature when it comes into contact with the substrate layer 1.

[0087] Furthermore, the negative pressure unit is set in the support structure and located in the second space to provide suction to the negative pressure area. The negative pressure unit can be a vacuum fan. In the vacuum suction area, the heating unit continuously heats the material. When the substrate layer 1 comes into contact with the heating area, the substrate layer 1 is continuously softened due to the high temperature of the roller. Under the pressure of the upper rubber roller 531, the substrate layer 1 is pressed into the microstructure 11 pattern on the surface of the roller. At the same time, the softened and pressed substrate layer 1 is further adsorbed through the ventilation hole using the principle of vacuum adsorption, so that the substrate layer 1 is tightly attached to the surface of the microstructure 11 of the pattern roller 532, and the substrate layer 1 is fully filled in the embossing structure of the pattern roller 532.

[0088] Furthermore, the demolding unit is set in the support structure and located in the fourth space. It is used to blow air to demold the demolding area. The demolding unit can be a blower. The blower blows out high-speed cold air, which can quickly cool and shape the roller and the substrate layer 1. At the same time, the impact force of the high-speed gas pushes the substrate layer 1 outward through the air vents, which helps the cooled substrate layer 1 to quickly demold from the embossed structure surface of the flower roller 532.

[0089] Specifically, Example 2 is provided regarding the preparation process of the cover structure.

[0090] Example 2

[0091] In this embodiment, the substrate layer 1 is a PE aluminum foil composite film with a thickness of 1-1000μm, preferably 100μm, and an aluminum film thickness of 1-1000μm, preferably 40μm. The PE aluminum foil composite film is then put into the production line.

[0092] First, the PE aluminum foil composite film, serving as the substrate layer 1, enters the embossing section 5 via the unwinding section. The embossing section 5 uses a pattern roller 532 with a diameter greater than 400mm. The heating zone between the roller cooling zone and the negative pressure zone is equipped with more than three heating rods, with the temperature of the heating rods set at 30-120℃, preferably 80℃. The temperature of the vacuum suction zone is set at 30-120℃, preferably 90℃. After the preceding process, the PE aluminum foil composite film is adhered to the roller surface and softened. After being adsorbed by the vacuum fan in the negative pressure unit, it is tightly adhered to the embossed structure surface of the roller. The forming pressure is 0.06-0.085MPa, preferably 0.07MPa. As the roller rotates, the PE aluminum foil composite film moves to the cooling zone and the demolding zone. The temperature of the cooling air is 0-20℃, preferably 10℃, and the blowing pressure is less than 0.1MPa, preferably 0.08MPa. Finally, the PE aluminum foil composite film is cooled and shaped, and then demolded from the surface of the embossed structure.

[0093] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cover structure, characterized in that, include: Substrate layer (1) with microstructures (11) on its surface; A superhydrophobic coating (2) is disposed on one side surface of the substrate layer (1) having the microstructure (11) and at least partially or completely covers the microstructure (11). The microstructure (11) is a micro-pattern (111) and / or a three-dimensional body disposed on the surface of the substrate layer (1).

2. The cover structure according to claim 1, characterized in that, The micro-pattern (111) includes: Linear pattern, wherein the linear pattern is composed of multiple spaced straight lines and / or curves; The graphic pattern is composed of multiple intersecting lines.

3. The cover structure according to claim 2, characterized in that, The micro-pattern (111) is any one or a combination of straight-line patterns, curved patterns, and diamond-shaped patterns.

4. The cover structure according to claim 1, characterized in that, The three-dimensional volume is a regularly arranged three-dimensional volume.

5. The cover structure according to claim 4, characterized in that, The regularly arranged three-dimensional volume is a micro-protrusion (112). The micro-protrusions (112) protruding from the surface of the substrate layer (1) are in the shape of one or a combination of several of the following: pyramid, frustum, prism, cylinder, and cone. The height of the micro-protrusions (112) is between 1 nm and 2 mm, and the spacing between the micro-protrusions (112) is between 1 nm and 1 mm.

6. The cover structure according to claim 4, characterized in that, The regularly arranged three-dimensional volume is a micro-pit (113). The micro-pits (113) recessed into the surface of the substrate layer (1) are in the shape of one or a combination of several of the following: pyramid, frustum, prism, cylinder, and cone. The depth of the micro-pits (113) is between 1 nm and 2 mm, and the spacing between the micro-pits (113) is between 1 nm and 1 mm.

7. The cover structure according to claim 1, characterized in that, The three-dimensional volume is an irregularly arranged three-dimensional volume.

8. The cover structure according to claim 7, characterized in that, The irregularly arranged three-dimensional volume includes: The irregularly shaped protrusions protruding from the surface of the substrate layer (1) and / or the irregularly shaped recesses recessed into the surface of the substrate layer (1).

9. The cover structure according to any one of claims 1-8, characterized in that, It also includes an adhesive layer (3); the adhesive layer (3) is disposed between the substrate layer (1) and the superhydrophobic coating (2); The thickness of the adhesive layer (3) is less than the spatial thickness of the microstructure (11).

10. The cover structure according to any one of claims 1-8, characterized in that, The thickness of the superhydrophobic coating (2) is greater than the spatial thickness of the microstructure (11).

11. The cover structure according to any one of claims 1-8, characterized in that, The contact angle between the surface of the superhydrophobic coating (2) away from the microstructure (11) and the liquid medium is greater than 160°, and / or the roll-off angle of the liquid medium on the superhydrophobic coating (2) is less than 5°.

12. A bottle body, characterized in that, It includes a cup body (4) and a lid structure as described in any one of claims 1-11; the lid structure is disposed at the mouth of the cup body (4).

13. The bottle body according to claim 12, characterized in that, The cup body (4) has a guide groove (41) formed circumferentially on the inner side of the cup opening, and the lid structure has a protrusion (12) on the side near the cup opening to cooperate with the guide groove (41).

14. A production line, characterized in that, Used to prepare the cover structure according to any one of claims 1-11; The production line includes an unwinding section (51), a preheating section (52), an imprinting section (53), a tensioning section (54), and a rewinding section (55) arranged in sequence. The imprinting section (53) is used to prepare the microstructure (11) on the substrate layer (1).

15. The production line according to claim 14, characterized in that, The imprinting section (53) includes at least a rubber roller (531) and a pattern roller (532); The surface of the flower roller (532) is provided with an embossing structure; The surface of the rubber roller (531) and the surface of the pattern roller (532) are pressed together to imprint the substrate layer (1) to prepare the microstructure (11).

16. The production line according to claim 14 or 15, characterized in that, It also includes a cooling section (56) disposed between the imprinting section (53) and the tensioning section (54) for cooling the substrate layer (1) on which the microstructure (11) is prepared.

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