High-barrier plastic bottle cap and high-barrier plastic bottle

Abstract

The utility model discloses a plastic bottle cap with high barrier property, which is characterized in that an opening cavity is defined by a bottle cap and a side cap so as to be mounted on a bottle body of a plastic bottle to seal the bottle body, and a sealing part I is arranged on the side cap so as to be matched with the bottle body through the sealing part I to seal a gap between the outer wall of the side cap and the outer wall of the bottle body. According to the plastic bottle, the first blocking layer is matched with the bottle body with the second blocking layer on the outer wall to comprehensively block and cover the outer wall of the plastic bottle, the blocking property of the plastic bottle is effectively improved, the defects in the prior art are overcome through cooperation of the first sealing part and the first blocking layer, and the sealing performance of the plastic bottle is improved. The barrier property of a plastic bottle sealed by the high-barrier plastic bottle cap can be improved through comprehensive barrier covering of the barrier coating, so that the high-barrier plastic bottle cap is almost suitable for packaging of most materials, wide in application range, high in practicability and suitable for wide popularization and application. In addition, the utility model further discloses the high-barrier plastic bottle.

Description

Technical Field

[0001] The utility model relates to the technical field of material packaging, in particular to a high-barrier plastic bottle cap. In addition, the utility model also relates to a high-barrier plastic bottle comprising the high-barrier plastic bottle cap. Background Art

[0002] In the packaging industry, most materials are packaged in plastic bottles. Only a small number of materials with higher barrier requirements, such as alcoholic beverages and milk, are packaged in glass bottles. This is because plastic bottles are lighter, easier to carry, have lower production costs, and are less prone to damage than glass bottles. Glass bottles have higher barrier properties than plastic bottles, but their costs are also relatively high.

[0003] Therefore, in order to obtain a plastic packaging container with high barrier properties and strong versatility, for example, Chinese utility model patent CN218345532U discloses a plastic ampoule vacuum coating module and an integrated molding machine, which improves the barrier properties of the plastic ampoule by forming a barrier coating on the outer wall of the plastic ampoule. However, in the process of processing and manufacturing plastic bottles, if the bottle body and the bottle cap form a plastic bottle and then the plastic bottle is plated as a whole, since the outer wall of the bottle mouth of the bottle body covered by the bottle cap does not have a barrier coating, and there is a gap between the bottle body and the bottle cap, the external gas will penetrate from the gap between the bottle body and the bottle cap into the bottle mouth of the bottle body, and then penetrate into the plastic bottle, and the barrier properties are still relatively low, as shown in Chinese utility model patent CN206297902 U discloses a plastic bottle, the bottom of the bottle cap is connected to a breaking ring, the breaking ring is stuck on the outer peripheral surface of the bottle mouth, and the breaking ring is used to prevent the plastic bottle from opening abnormally during use, but there are gaps between the breaking ring and the bottle cap and the bottle body. In addition, if the bottle body and the bottle cap are separately plated, the bottle mouth of the bottle body is usually clamped by a clamping mechanism as a clamping point, and then it will be shielded by the clamping mechanism during the plating process and cannot be plated with a barrier coating. Therefore, after the bottle cap seals the bottle body, there will always be a gap between the outer wall of the bottle cap and the outer wall of the bottle body, resulting in external gas always being able to penetrate between the bottle cap and the bottle mouth of the bottle body, and then penetrate into the plastic bottle, but it is impossible to achieve comprehensive barrier coverage of the plastic bottle, so that the barrier property of the plastic bottle cannot be effectively improved. Utility Model Content

[0004] The utility model provides a high-barrier plastic bottle cap and a high-barrier plastic bottle, so as to solve the technical problem that the existing plastic bottle cap cannot effectively improve the barrier property of the plastic bottle.

[0005] According to one aspect of the utility model, a high-barrier plastic bottle cap is provided, comprising a top cover, a side cover arranged on the edge of the top cover, a sealing portion 1 arranged on the side cover, and a barrier layer 1 arranged on the outer wall of the top cover, the outer wall of the side cover and the outer wall of the sealing portion 1 at the same time, the sealing portion 1 is used to cooperate with the bottle body to seal the gap between the outer wall of the side cover and the outer wall of the bottle body, so that the barrier layer 1 cooperates with the bottle body having the barrier layer 2 on the outer wall to fully barrier and cover the outer wall of the plastic bottle.

[0006] As a further improvement of the above technical solution:

[0007] Furthermore, a threaded portion is arranged on the inner wall of the side cover, which is used to be threadedly connected with the bottle body and exert a force on the sealing portion 1 to promote the sealing portion 1 to cooperate and seal with the bottle body.

[0008] Furthermore, the sealing portion 1 is an elastomer for elastically cooperating with the bottle body to seal.

[0009] According to another aspect of the utility model, a high-barrier plastic bottle is provided, which includes the above-mentioned high-barrier plastic bottle cap, the plastic bottle also includes a bottle body, a barrier layer 2 arranged on the outer wall of the bottle body, and a sealing part 2 arranged on the outer wall of the bottle body and arranged opposite to the sealing part 1, the sealing part 2 is used to cooperate with the sealing part 1 for sealing, so that the barrier layer 1 and the barrier layer 2 are in continuous contact, thereby providing comprehensive barrier coverage to the outer wall of the plastic bottle.

[0010] As a further improvement of the above technical solution:

[0011] Furthermore, the sealing part 1 is an abutting ring 1 arranged on the end of the bottle cap facing the bottle body, and the sealing part 2 is an abutting ring 2 convexly arranged on the outer wall of the bottle body for abutting and sealing with the abutting ring 1.

[0012] Furthermore, the end surface of the abutment ring 1 facing the abutment ring 2 is an inclined surface 1 arranged obliquely, and the end surface of the abutment ring 2 facing the abutment ring 1 is an inclined surface 2 arranged obliquely for surface-to-surface contact with the inclined surface 1.

[0013] Furthermore, an abutment protrusion is convexly provided on the end of the abutment ring 1 facing the abutment ring 2, and an abutment groove for plugging and matching with the abutment protrusion is concavely provided on the end of the abutment ring 2 facing the abutment ring 1.

[0014] Furthermore, the sealing part 1 is arranged on the end surface of the side cover facing away from the top cover and is used to match the shape of the mating end surface of the sealing part 2 so as to be in surface-to-surface sealing contact with the sealing part 2.

[0015] Furthermore, the second sealing portion is a cone portion arranged on the outer wall of the bottle body, and the sealing surface is an inclined cone surface.

[0016] Furthermore, the second sealing part is a spherical part arranged on the outer wall of the bottle body, and the sealing surface is a curved spherical surface.

[0017] Furthermore, the first sealing part is an inserting outer ring which is arranged on the outer wall of the bottle body and is used to enclose with the outer wall of the bottle body to form a sealing cavity with an opening toward the side cover, and the second sealing part is an inserting inner ring on the end of the bottle cap facing the bottle body and is used to be inserted into the sealing cavity to fit and seal with the inserting outer ring surface.

[0018] Furthermore, the second sealing part is an elastomer for elastically cooperating with the first sealing part to seal.

[0019] Furthermore, the plastic bottle also includes anti-theft labels respectively bonded to the outer wall of the bottle cap and the outer wall of the bottle body.

[0020] Furthermore, a first annular protrusion and a second annular protrusion are convexly provided on the inner wall of the top cover, and the first annular protrusion and the second annular protrusion are arranged at intervals to enclose with the top cover to form a sealed cavity, and the sealed cavity is plugged and matched with the bottle body to seal.

[0021] Furthermore, an elastic protrusion is convexly provided on the inner wall of the top cover between the first annular protrusion and the second annular protrusion, and the elastic protrusion elastically abuts against the top wall of the bottle body for sealing.

[0022] Furthermore, a sealing ring is convexly provided on the inner wall of the top cover and elastically abuts against the top wall of the bottle body for sealing.

[0023] The utility model has the following beneficial effects:

[0024] The high-barrier plastic bottle cap of the utility model forms an open cavity by enclosing the bottle cap and the side cover, so as to be installed on the bottle body of the plastic bottle to seal the bottle body, and then a sealing part 1 is arranged on the side cover to cooperate with the bottle body to seal the gap between the outer wall of the side cover and the outer wall of the bottle body, thereby eliminating the gap between the outer wall of the side cover and the outer wall of the bottle body, so that the barrier layer 1 cooperates with the bottle body with the barrier layer 2 on the outer wall to fully barrier and cover the outer wall of the plastic bottle, thereby effectively improving the barrier property of the plastic bottle. The scheme eliminates the deficiencies existing in the prior art through the coordinated cooperation of the sealing part 1 and the barrier layer 1, so that the plastic bottle sealed with the high-barrier plastic bottle cap can improve the barrier property through the comprehensive barrier coverage of the barrier layer, thereby being almost suitable for the packaging of most materials, having a wide range of applications, strong practicality, and being suitable for wide promotion and application.

[0025] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0027] Figure 1 This is a schematic structural diagram of a high barrier plastic bottle cap according to a preferred embodiment of the utility model;

[0028] Figure 2 yes Figure 1 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle cap is shown;

[0029] Figure 3 yes Figure 1 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle cap is shown;

[0030] Figure 4 This is a schematic structural diagram of a high barrier plastic bottle of a preferred embodiment of the utility model;

[0031] Figure 5 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0032] Figure 6 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0033] Figure 7 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0034] Figure 8 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0035] Fig. 9 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0036] Fig.10 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown;

[0037] Fig.11 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown.

[0038] Legend:

[0039] 100, top cover; 110, first annular protrusion; 120, second annular protrusion; 130, elastic protrusion; 140, sealing ring; 200, side cover; 300, sealing part one; 310, sealing surface; 400, barrier layer one; 500, bottle body; 600, sealing part two; 610, plug-in outer ring; 700, barrier layer two. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0041] Figure 1 This is a schematic structural diagram of a high barrier plastic bottle cap according to a preferred embodiment of the utility model; Figure 2 yes Figure 1 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle cap is shown; Figure 3 yes Figure 1 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle cap is shown; Figure 4 This is a schematic structural diagram of a high barrier plastic bottle of a preferred embodiment of the utility model; Figure 5 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Figure 6 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Figure 7 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Figure 8 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Fig. 9 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Fig.10 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown; Fig.11 yes Figure 4 A cross-sectional schematic diagram of an embodiment of a high barrier plastic bottle is shown.

[0042] like Figure 1-Figure 3As shown, the high barrier plastic bottle cap of this embodiment includes a top cover 100, a side cover 200 arranged on the edge of the top cover 100, a sealing part 300 arranged on the side cover 200, and a barrier layer 400 arranged on the outer wall of the top cover 100, the outer wall of the side cover 200 and the outer wall of the sealing part at the same time. The sealing part 300 is used to cooperate with the bottle body 500 to seal the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, so that the barrier layer 400 cooperates with the bottle body 500 having the barrier layer 700 on the outer wall to fully barrier and cover the outer wall of the plastic bottle. Specifically, the high barrier plastic bottle cap of the utility model is formed by enclosing an open cavity by the bottle cap and the side cover 200, so as to be installed on the bottle body 500 of the plastic bottle to seal the bottle body 500, and then the sealing part 300 is arranged on the side cover 200, so that the sealing part 300 cooperates with the bottle body 500 to seal the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, thereby eliminating the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, thereby making the barrier layer 40 0 cooperates with the bottle body 500 having the barrier layer 2700 on the outer wall to fully block and cover the outer wall of the plastic bottle, effectively improving the barrier property of the plastic bottle. This solution eliminates the deficiencies in the prior art through the cooperation of the sealing part 300 and the barrier layer 400, so that the plastic bottle sealed with the high barrier property plastic bottle cap can improve the barrier property through the comprehensive barrier coverage of the barrier layer, so that it is almost suitable for the packaging of most materials, has a wide range of applications, is highly practical, and is suitable for widespread promotion and application. It should be understood that in this embodiment, the good barrier property of the bottle body 500 means that a barrier coating is arranged on the outer wall of the bottle body 500, that is, after the sealing part 300 eliminates the gap between the outer wall of the bottle body 500 and the outer wall of the bottle cap, the barrier layer 400 and the barrier coating are in continuous contact on the outer wall of the plastic bottle, thereby achieving comprehensive barrier coverage of the plastic bottle, thereby improving the barrier property of the plastic bottle. It should be understood that the high barrier plastic bottle cap of this embodiment can be used for packaging materials with high barrier requirements such as beer and milk. It should be understood that the better the sealing between the sealing part 1 300 and the bottle body 500, the more the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500 can be completely eliminated. It should be understood that the barrier layer includes barrier layer 1 400 and barrier layer 2 700.

[0043] like Figure 1-Figure 3As shown, in this embodiment, a threaded portion is arranged on the inner wall of the side cover 200 for threaded connection with the bottle body 500 and exerting a force on the sealing portion 300 to promote the sealing portion 300 to cooperate and seal with the bottle body 500. Specifically, while the side cover 200 and the bottle body 500 are threadedly connected by the threaded portion, the force brought by the threaded structure exerts a force on the sealing portion 300 to approach the bottle body 500, thereby promoting the sealing portion 300 to cooperate and seal with the bottle body 500, eliminating the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, and providing structural support for the comprehensive barrier coverage of the plastic bottle.

[0044] like Figure 1-Figure 3 As shown, in this embodiment, the sealing part 1 300 is an elastic body for elastically cooperating and sealing with the bottle body 500. It should be understood that the sealing part 1 300 can be made of elastic materials such as rubber. Specifically, the elastic body and the bottle body 500 are elastically abutted and sealed to improve the sealing between the elastomer and the bottle body 500, prevent external gas from penetrating from the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, and provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0045] like Figure 4-Figure 6As shown, the high barrier plastic bottle of this embodiment includes the above-mentioned high barrier plastic bottle cap, and the plastic bottle also includes a bottle body 500, a barrier layer 2 700 arranged on the outer wall of the bottle body 500, and a sealing part 2 600 arranged on the outer wall of the bottle body 500 and arranged opposite to the sealing part 1 300, the sealing part 2 600 is used to cooperate with the sealing part 1 300 for sealing, so that the barrier layer 1 400 and the barrier layer 2 700 cooperate to fully barrier and cover the outer wall of the plastic bottle. Specifically, in the high barrier plastic bottle of the utility model, the material is filled into the bottle body 500 through the top opening of the bottle body 500. After the material filling is completed, the bottle cap is connected to the bottle body 500, so as to seal the top opening of the bottle body 500 through the top cover 100 to complete the packaging of the material, and after the side cover 200 is connected to the bottle body 500, the sealing part 1 300 is synchronously sealed with the sealing part 2 600, eliminating the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, that is, the barrier coating is completely continuous on the outer wall of the plastic bottle, so that the barrier layer 1 400 and the barrier layer 2 700 are connected. 00 cooperates with each other to fully block and cover the outer wall of the plastic bottle, thereby maximizing the barrier property of the plastic bottle, improving the packaging quality of the plastic bottle, and also improving the external sealing of the plastic bottle, preventing the infiltration of external bacteria, and ensuring drinking safety. This solution realizes comprehensive barrier coverage of the plastic bottle through the cooperation of the sealing part 1 300, the sealing part 2 600, the barrier layer 1 400 and the barrier layer 2 700. Compared with the prior art, the plastic bottle of this solution has relatively low cost and improved barrier property, wide application range, strong practicality, and is suitable for wide promotion and application. It should be understood that the barrier layer includes the barrier layer 1 400 and the barrier layer 2 700. It should be understood that the barrier layer is formed by external plating of a material with high barrier property such as silicon dioxide. It should be understood that the external plating process of the barrier layer belongs to the well-known technology of those skilled in the art. Optionally, the sealing part 1 300 is arranged on the end of the side cover 200 facing the bottle body 500, so that when the sealing part 2 600 and the sealing part 1 300 abut, the outer wall of the sealing part 1 300 and the outer wall of the sealing part 2 600 are abutted and continuous, thereby making the barrier layer completely continuous on the outer wall of the plastic bottle. Optionally, an internal thread structure is provided on the inner wall of the side cover 200, and an external thread structure threadedly connected to the internal thread structure is provided on the outer wall of the bottle body 500, and the bottle cap is installed on the bottle body 500 by threading the internal thread structure and the external thread structure. It should be understood that the high barrier plastic bottle of this embodiment can be applied to the packaging of materials with high barrier requirements such as beer and milk due to the improved barrier properties. Optionally, the plastic bottle is a cillin bottle, and the bottle cap includes a receiving cavity, a rubber plug arranged in the receiving cavity, and a sealing structure for sealing the rubber plug, and vaccines, powder injections, biological preparations, freeze-dried drugs and the like are packaged by the plastic bottle.It should be understood that the stronger the sealing performance between the sealing part 1 300 and the sealing part 2 600, the more structural support can be provided for the comprehensive barrier coverage of the plastic bottle by the barrier layer 1 400 and the barrier layer 2 700. It should be understood that the abutting end surfaces between the sealing part 1 300 and the sealing part 2 600 match each other to ensure good sealing performance after abutment. It should be understood that, as shown in the figure, after the sealing part 1 300 and the sealing part 2 600 are abutted and sealed, the part of the outer wall of the bottle body 500 that contacts the outside gas is evenly provided with the barrier layer 2 700, and the part of the outer wall of the bottle body 500 that does not contact the outside gas is shielded by the bottle cap, and under the action of the sealing part 1 300 and the sealing part 2 600, there is no gap between the outer wall of the bottle cap and the outer wall of the bottle body 500, and then under the action of the barrier layer 1 400 and the barrier layer 2 700, the plastic bottle can be fully blocked and covered, that is, the sealing part 1 300, the sealing part 2 600, the barrier layer 1 400 and the barrier layer 2 700 cooperate to achieve full blocking coverage of the plastic bottle. Optionally, in this embodiment, the sealing part 1 300 and the side cover 200 are integrally formed by injection molding, and in another embodiment, the sealing part 1 300 and the bottle cap are split structures. It should be understood that the connection process of the sealing part 1 300 and the side cover 200 is not limited. It only needs to ensure that after the sealing part 1 300 and the side cover 200 are connected, the sealing part 1 300 can achieve sealing with the sealing part 2 600.

[0046] like Figure 4-Figure 6 As shown, in this embodiment, the sealing part 1 300 is an abutting ring 1 arranged on the end of the bottle cap facing the bottle body 500, and the sealing part 2 600 is an abutting ring 2 convexly arranged on the outer wall of the bottle body 500 for abutting and sealing with the abutting ring 1. Specifically, after the bottle cap and the bottle body 500 are connected, the abutting ring 1 is synchronously abutted and sealed with the abutting ring 2, so as to eliminate the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500 to the greatest extent through the abutting pressure, so that the barrier layer 1 400 and the barrier layer 2 700 are in contact and continuous on the outer wall of the plastic bottle, thereby fully blocking and covering the outer wall of the plastic bottle. Optionally, the abutting ring 1 is arranged on the end of the side cover 200 facing the bottle body 500, so that when the abutting ring 2 and the abutting ring 1 are abutted, the outer wall of the abutting ring 1 and the outer wall of the abutting ring 2 are in contact and continuous, thereby making the barrier coating completely continuous on the outer wall of the plastic bottle. It should be understood that the stronger the sealing performance between the abutting ring 1 and the abutting ring 2, the more structural support can be provided for the comprehensive barrier coverage of the plastic bottle by the barrier layer 1 400 and the barrier layer 2 700. It should be understood that the abutting end faces between the abutting ring 1 and the abutting ring 2 match to ensure good sealing performance after abutment.

[0047] like Figure 7As shown, in this embodiment, the end surface of the abutting ring 1 facing the abutting ring 2 is the inclined surface 1 arranged obliquely, and the end surface of the abutting ring 2 facing the abutting ring 1 is the inclined surface 2 arranged obliquely for face-to-face contact with the inclined surface 1. Specifically, the sealing area between the abutting ring 1 and the abutting ring 2 is increased by the face-to-face contact between the inclined surface 1 and the inclined surface 2, and the infiltration of gas into the inclined surface is more difficult than that of the horizontal surface, thereby improving the sealing performance between the abutting ring 1 and the abutting ring 2, so as to provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0048] like Figure 8 As shown, in this embodiment, the end of the abutting ring 1 facing the abutting ring 2 is provided with an abutting protrusion, and the end of the abutting ring 2 facing the abutting ring 1 is provided with an abutting groove for plugging and matching with the abutting protrusion. Specifically, the plugging and matching of the abutting protrusion and the abutting groove between the abutting ring 1 and the abutting ring 2 increases the sealing area, and the gas infiltration of the curved surface is more difficult than that of the horizontal surface, thereby improving the sealing performance between the abutting ring 1 and the abutting ring 2, so as to provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0049] like Fig. 9 and Fig.10 As shown, in this embodiment, the sealing part 1 300 is a sealing surface 310 arranged on the end surface of the side cover 200 facing away from the top cover 100, which is used to match the shape of the mating end surface of the sealing part 2 600 so as to be face-to-face sealed with the sealing part 2 600. Specifically, after the bottle cap and the bottle body 500 are connected, the sealing surface 310 is face-to-face sealed with the sealing part 2 600 to eliminate the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, thereby improving the sealing between the outer wall of the bottle cap and the outer wall of the bottle body 500, so as to provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0050] like Fig.10 As shown, in this embodiment, the sealing part 2 600 is a cone arranged on the outer wall of the bottle body 500, and the sealing surface 310 is an inclined cone. Specifically, compared with the horizontal surface sealing, the cone surface matching seal increases the difficulty of gas penetration, has a stronger sealing performance, can eliminate the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500 to the greatest extent, improve the sealing performance between the outer wall of the bottle cover and the outer wall of the bottle body 500, and provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0051] like Fig. 9As shown, in this embodiment, the sealing part 2 600 is a spherical part arranged on the outer wall of the bottle body 500, and the sealing surface 310 is a curved spherical surface. Specifically, compared with the horizontal surface sealing, the spherical surface matching seal increases the difficulty of gas penetration, has a stronger sealing performance, can eliminate the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500 to the greatest extent, improve the sealing performance between the outer wall of the bottle cover and the outer wall of the bottle body 500, and provide structural support for the comprehensive barrier coverage of the plastic bottle.

[0052] like Fig.11 As shown, in this embodiment, the sealing part 1 300 is an insert outer ring 610 arranged on the outer wall of the bottle body 500 and used to enclose with the outer wall of the bottle body (500) to form a sealed cavity with an opening toward the side cover 200, and the sealing part 2 600 is an insert inner ring on the end of the bottle cap facing the bottle body (500) and used to be inserted into the sealed cavity to be sealed with the insert outer ring 610 face to face. Specifically, the sealed cavity is formed by the insert outer ring 610, so that after the insert inner ring is inserted into the sealed cavity, the insert outer ring 610 and the insert inner ring are sealed face to face to eliminate the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, thereby improving the sealing between the outer wall of the bottle cap and the outer wall of the bottle body 500, so as to provide structural support for the comprehensive barrier coverage of the plastic bottle. Optionally, the insert outer ring 610 and / or the insert inner ring are elastomers to achieve elastic fit sealing. Preferably, the bottom of the sealing cavity is sealed against the end face of the plug-in inner ring, that is, while achieving a surface-to-surface seal, the surface-to-surface seal is also achieved, so as to further improve the sealing between the outer wall of the side cover 200 and the outer wall of the bottle body 500, and ensure reliable sealing. It should be understood that since the plug-in cavity formed by the plug-in outer ring 610 is plugged in with the plug-in inner ring, the plug-in inner ring is limited in the radial direction by the plug-in outer ring 610, thereby further improving the reliability of the bottle cap and the bottle body 500 after assembly.

[0053] like Figure 4-Figure 6As shown, in this embodiment, the sealing part 2 600 is an elastomer for elastically cooperating with the sealing part 1 300 to seal. Specifically, the sealing part 1 300 and the elastomer are elastically cooperating to seal, so as to improve the external sealing property of the plastic bottle and prevent the external gas from penetrating from the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500. Optionally, the sealing part 1 300 and the sealing part 2 600 are both elastomers, so as to improve the external sealing property of the plastic bottle to the greatest extent through elastic deformation, prevent the external gas from penetrating from the gap between the outer wall of the side cover 200 and the outer wall of the bottle body 500, so as to provide structural support for the comprehensive barrier coverage of the plastic bottle. It should be understood that when the sealing part 1 300 and the sealing part 2 600 are elastically abutted, under the action of elastic deformation, the uneven end face caused by the lack of processing accuracy during the injection molding process of the sealing part 1 300 and the sealing part 2 600 can be compensated, thereby reducing the process difficulty and facilitating processing and manufacturing.

[0054] like Figure 4-Figure 6 As shown, in this embodiment, the plastic bottle also includes anti-theft labels respectively bonded to the outer wall of the bottle cap and the outer wall of the bottle body 500. Specifically, the anti-theft label identifies the use status of the plastic bottle and prevents the plastic bottle from being opened abnormally. It should be understood that if the plastic bottle of this solution is sealed with an anti-theft ring, a gap will be formed between the outer wall of the bottle cap and the outer wall of the bottle body 500, and comprehensive barrier coverage cannot be achieved.

[0055] like Figure 4-Figure 6 As shown, in this embodiment, a stabilizing groove is concavely provided on the bottom of the bottle body 500. Specifically, the stabilizing groove is concavely provided on the bottom of the bottle body 500 so that the radial cross section of the bottom of the bottle body 500 is arranged in a triangular shape, thereby improving the stability of the plastic bottle after being placed vertically.

[0056] like Figure 2 and Figure 5 As shown, in this embodiment, a first annular protrusion 110 and a second annular protrusion 120 are convexly provided on the inner wall of the top cover 100, and the first annular protrusion 110 and the second annular protrusion 120 are arranged at intervals to enclose with the top cover 100 to form a sealed cavity, and the sealed cavity is plugged and matched with the bottle body 500 for sealing. Specifically, the sealed cavity is enclosed by the first annular protrusion 110, the second annular protrusion 120 and the top cover 100 to form a sealed cavity to be plugged and matched with the top of the bottle body 500, and the inner wall of the first annular protrusion 110 and the outer wall of the bottle body 500 are fitted and sealed, and the outer wall of the second annular protrusion 120 and the inner wall of the bottle body 500 are fitted and sealed, thereby improving the internal sealing between the bottle body 500 and the bottle cap.

[0057] like Figure 2 and Figure 5As shown, in this embodiment, an elastic protrusion 130 is convexly provided on the inner wall of the top cover 100 between the first annular protrusion 110 and the second annular protrusion 120, and the elastic protrusion 130 elastically abuts and seals with the top wall of the bottle body 500. Specifically, the elastic protrusion 130 is sealed with the top wall of the bottle body 500 to achieve three-sided sealing at the same time, further improving the internal sealing between the bottle body 500 and the bottle cap. Optionally, the corner between the end of the second annular protrusion 120 facing the bottle body 500 and the inner wall of the second annular protrusion 120 is chamfered, and the chamfer is used to guide the insertion of the bottle body 500 into the sealing cavity to reduce the difficulty of assembly.

[0058] like Figure 3 and Figure 6 As shown, in this embodiment, a sealing ring 140 is convexly provided on the inner wall of the top cover 100 and elastically abuts and seals with the top wall of the bottle body 500. Specifically, after the side cover 200 is connected to the bottle body 500, the sealing ring 140 and the top wall of the bottle body 500 are elastically abutted and sealed to improve the internal sealing between the bottle body 500 and the bottle cap. Optionally, the sealing ring 140 is made of elastic materials such as rubber. Optionally, the radial length of the sealing ring 140 is greater than the radial length of the top wall of the bottle body 500. After the sealing ring 140 and the top wall of the bottle body 500 are elastically abutted, the sealing ring 140 is elastically deformed, and because the radial length of the sealing ring 140 is greater than the radial length of the top wall of the bottle body 500, the semi-wrapped sealing of the top wall of the bottle body 500 is realized, and the internal sealing between the bottle body 500 and the bottle cap is further improved.

[0059] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A high barrier plastic bottle cap, characterized in that: The invention comprises a top cover (100), a side cover (200) arranged on the edge of the top cover (100), a sealing part (300) arranged on the side cover (200), and a barrier layer (400) arranged on the outer wall of the top cover (100), the outer wall of the side cover (200) and the outer wall of the sealing part (300). The sealing part (300) is used to cooperate with the bottle body (500) to seal the gap between the outer wall of the side cover (200) and the outer wall of the bottle body (500), so that the barrier layer (400) cooperates with the bottle body (500) having the barrier layer (700) on the outer wall to fully block and cover the outer wall of the plastic bottle.

2. The high barrier plastic bottle cap according to claim 1, characterized in that: A threaded portion is arranged on the inner wall of the side cover (200) for being threadedly connected to the bottle body (500) and exerting a force on the sealing portion 1 (300) to promote the sealing portion 1 (300) to cooperate and seal with the bottle body (500).

3. The high barrier plastic bottle cap according to claim 1, characterized in that: The sealing part 1 (300) is an elastic body used for elastically cooperating with the bottle body (500) to form a seal.

4. A high barrier plastic bottle, characterized in that: The high-barrier plastic bottle cap comprises the high-barrier plastic bottle cap as described in any one of claims 1 to 3, and the plastic bottle further comprises a bottle body (500), a barrier layer 2 (700) arranged on the outer wall of the bottle body (500), and a sealing part 2 (600) arranged on the outer wall of the bottle body (500) and arranged opposite to the sealing part 1 (300), wherein the sealing part 2 (600) is used to cooperate with the sealing part 1 (300) for sealing, so that the barrier layer 1 (400) and the barrier layer 2 (700) cooperate to provide comprehensive barrier coverage for the outer wall of the plastic bottle.

5. The high barrier plastic bottle according to claim 4, characterized in that: The sealing part 1 (300) is an abutment ring 1 arranged on the end of the bottle cap facing the bottle body (500), and the sealing part 2 (600) is an abutment ring 2 protruding from the outer wall of the bottle body (500) and used for abutting and sealing with the abutment ring 1.

6. The high barrier plastic bottle according to claim 5, characterized in that: The end surface of the abutment ring 1 facing the abutment ring 2 is an inclined surface 1 arranged obliquely, and the end surface of the abutment ring 2 facing the abutment ring 1 is an inclined surface 2 arranged obliquely for surface-to-surface contact with the inclined surface 1.

7. The high barrier plastic bottle according to claim 5, characterized in that: An abutment protrusion is convexly provided on the end of the abutment ring 1 facing the abutment ring 2, and an abutment groove for plugging and matching with the abutment protrusion is concavely provided on the end of the abutment ring 2 facing the abutment ring 1.

8. The high barrier plastic bottle according to claim 4, characterized in that: The sealing part 1 (300) is a sealing surface (310) disposed on the end surface of the side cover (200) facing away from the top cover (100) and matching the shape of the mating end surface of the sealing part 2 (600) so as to be face-to-face fitted and sealed with the sealing part 2 (600).

9. The high barrier plastic bottle according to claim 8, characterized in that: The second sealing portion (600) is a cone portion arranged on the outer wall of the bottle body (500), and the sealing surface (310) is an inclined cone surface.

10. The high barrier plastic bottle according to claim 8, characterized in that: The second sealing part (600) is a spherical part arranged on the outer wall of the bottle body (500), and the sealing surface (310) is a curved spherical surface.

11. The high barrier plastic bottle according to claim 4, characterized in that: The sealing part 1 (300) is an insertable outer ring (610) arranged on the outer wall of the bottle body (500) and used to enclose with the outer wall of the bottle body (500) to form a sealed cavity with an opening toward the side cover (200). The sealing part 2 (600) is an insertable inner ring on the end of the bottle cap facing the bottle body (500) and used to be inserted into the sealed cavity to form a surface-to-surface seal with the insertable outer ring (610).

12. The high barrier plastic bottle according to any one of claims 4 to 11, characterized in that: The second sealing part (600) is an elastomer and is used to elastically cooperate with the first sealing part (300) to seal.

13. The high barrier plastic bottle according to any one of claims 4 to 11, characterized in that: The plastic bottle further comprises anti-theft labels respectively bonded to the outer wall of the bottle cap and the outer wall of the bottle body (500).

14. The high barrier plastic bottle according to any one of claims 4 to 11, characterized in that: A first annular protrusion (110) and a second annular protrusion (120) are convexly provided on the inner wall of the top cover (100); the first annular protrusion (110) and the second annular protrusion (120) are arranged at intervals to enclose the top cover (100) to form a sealed cavity; the sealed cavity is plugged into and sealed with the bottle body (500).

15. The high barrier plastic bottle according to claim 14, characterized in that: An elastic protrusion (130) is convexly provided on the inner wall of the top cover (100) between the first annular protrusion (110) and the second annular protrusion (120), and the elastic protrusion (130) elastically abuts against the top wall of the bottle body (500) to form a seal.

16. The high barrier plastic bottle according to any one of claims 4 to 11, characterized in that: A sealing ring (140) is convexly provided on the inner wall of the top cover (100) and is elastically abutted and sealed against the top wall of the bottle body (500).

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