High-barrier plastic bottle and manufacturing method therefor, and beer bottle

Abstract

A high-barrier plastic bottle, comprising a bottle cap (100) and a bottle body (200) having a top opening, wherein the bottle cap (100) is connected to the bottle body (200) and is used for sealing the top opening of the bottle body (200), a first barrier layer (120) is arranged on the outer wall of the bottle cap (100), a second barrier layer (220) is arranged on the outer wall of the bottle body (200), and a sealing structure is arranged between the bottle cap (100) and the bottle body (200) for enabling the first barrier layer (120) and the second barrier layer (220) to be in continuous contact on the outer wall of the plastic bottle so as to achieve comprehensive barrier coverage of the outer wall of the plastic bottle. When the bottle cap (100) is connected to the bottle body (200), a gap between the outer wall of the bottle cap (100) and the outer wall of the bottle body (200) is eliminated by means of the sealing structure, so that the first barrier layer (120) and the second barrier layer (220) are in continuous contact on the outer wall of the plastic bottle, thereby achieving comprehensive barrier coverage of the outer wall of the plastic bottle and improving the barrier property of the plastic bottle to the greatest extent.

Description

High-barrier plastic bottle, beer bottle and manufacturing method thereof Technical Field

[0001] The present invention relates to the field of material packaging technology, and in particular, to a high-barrier plastic bottle. Furthermore, the present invention relates to a beer bottle having the high-barrier plastic bottle. The present invention also relates to a method for manufacturing the high-barrier plastic bottle. 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 are also more expensive.

[0003] Therefore, in order to obtain a plastic packaging container with low cost, high barrier property and strong versatility, Chinese utility model patent CN218345532U discloses a plastic ampoule vacuum coating module and an integrated molding machine, which improves the barrier property of the plastic ampoule by forming a barrier coating on the outer wall of the plastic ampoule. However, in the process of manufacturing plastic bottles, if the bottle body and bottle cap are combined into a plastic bottle and then the plastic bottle is coated as a whole, since the outer wall of the bottle mouth covered by the bottle cap does not have a barrier coating, and there is a gap between the bottle body and the bottle cap, external gas will penetrate into the gap between the bottle body and the bottle cap and then penetrate into the bottle mouth. When placed in a plastic bottle, the barrier property is still relatively low. For example, Chinese utility model patent CN206297902U discloses a plastic bottle with a breaking ring connected to the bottom of the bottle cap, which is stuck on the outer peripheral surface of the bottle mouth. The breaking ring prevents the plastic bottle from opening abnormally during use. However, there are gaps between the breaking ring, the bottle cap and the bottle body. In addition, if the bottle body and the bottle cap are plated separately, the bottle mouth of the bottle body is usually clamped by the clamping mechanism as a clamping point, and then 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, if a gap appears between the bottle cap and the bottle body, the above-mentioned problem will also occur. Summary of the Invention

[0004] The invention provides a high-barrier plastic bottle, a beer bottle and a manufacturing method thereof, so as to solve the technical problem of low barrier property of existing plastic bottles.

[0005] According to one aspect of the present invention, a high-barrier plastic bottle is provided, comprising a bottle cap and a bottle body having a top opening, wherein the bottle cap is connected to the bottle body and is used to seal the top opening of the bottle body, a barrier layer 1 is provided on the outer wall of the bottle cap, a barrier layer 2 is provided on the outer wall of the bottle body, and a sealing structure is provided between the bottle cap and the bottle body for ensuring that the barrier layer 1 and the barrier layer 2 are in continuous contact on the outer wall of the plastic bottle, thereby providing comprehensive barrier coverage to the outer wall of the plastic bottle.

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

[0007] Furthermore, the sealing structure includes an abutment ring 1 arranged on the end of the bottle cap facing the bottle body and an abutment ring 2 protruding from the outer wall of the bottle body for abutting and sealing with the abutment ring 1.

[0008] Furthermore, the abutting ring 1 is an elastic body for elastically abutting and sealing with the abutting ring 2; and / or the abutting ring 2 is an elastic body for elastically abutting and sealing with the abutting ring 1.

[0009] Furthermore, the end surface of the abutting ring 1 facing the abutting ring 2 is an inclined surface 1 arranged obliquely, and the end surface of the abutting ring 2 facing the abutting ring 1 is an inclined surface 2 arranged obliquely for surface-to-surface contact with the inclined surface 1.

[0010] Furthermore, an abutting protrusion is convexly provided on the end of the abutting ring 1 facing the abutting ring 2, and an abutting groove for plugging and fitting with the abutting protrusion is concavely provided on the end of the abutting ring 2 facing the abutting ring 1.

[0011] Furthermore, the sealing structure includes a sealing cone surface 1 obliquely arranged on the end surface of the bottle cap facing the bottle body and a sealing cone surface 2 obliquely arranged on the outer wall of the bottle body for sealing with the sealing cone surface 1.

[0012] Furthermore, the sealing structure includes an inserting outer ring arranged on the outer wall of the bottle body for enclosing with the outer wall of the bottle body to form a sealing cavity with an opening toward the bottle cap, and an inserting inner ring arranged on the end of the bottle cap facing the bottle body for inserting into the sealing cavity to fit surface-to-surface with the inserting outer ring for sealing.

[0013] Furthermore, the sealing structure includes a sealing spherical surface curvedly arranged on the end surface of the bottle cap facing the bottle body and used to match the shape of the outer wall of the bottle body.

[0014] Furthermore, the plastic bottle further comprises anti-theft labels respectively adhered to the outer wall of the bottle cap and the outer wall of the bottle body.

[0015] Furthermore, a first sealing ring and a second sealing ring are convexly provided on the inner top wall of the bottle cap, and the first sealing ring and the second sealing ring are arranged at intervals. The inner wall of the first sealing ring is sealed against the outer wall of the bottle body, and the outer wall of the second sealing ring is sealed against the inner wall of the bottle body.

[0016] Furthermore, a sealing protrusion is provided on the inner top wall of the bottle cap between the first sealing ring and the second sealing ring for elastically abutting and sealing against the top wall of the bottle body.

[0017] Furthermore, a sealing ring is convexly provided on the inner top wall of the bottle cap and elastically abuts against the top wall of the bottle body for sealing.

[0018] According to another aspect of the present invention, a beer bottle is provided, which has the above-mentioned high-barrier plastic bottle.

[0019] According to another aspect of the present invention, a method for manufacturing a high-barrier plastic bottle is provided, which is used to manufacture the above-mentioned high-barrier plastic bottle, and specifically comprises the following steps: S1, using an injection molding process to separately injection-mold a bottle cap, a bottle body, and a sealing structure between the bottle cap and the bottle body; S2, coating the outer wall of the bottle cap with a barrier layer 1, and after the bottle body is filled with material, sealing the bottle body with the bottle cap to obtain a plastic bottle; S3, supporting the plastic bottle with the bottle cap as a supporting base point, and then coating the plastic bottle to form a barrier layer 2 on the outer wall of the bottle body.

[0020] The present invention has the following beneficial effects:

[0021] The high-barrier plastic bottle of the present invention is filled with material into the bottle body through the top opening of the bottle body. After the material filling is completed, the bottle cap is connected to the bottle body to seal the top opening of the bottle body through the bottle cap to complete the packaging of the material. After the bottle cap is connected to the bottle body, the gap between the outer wall of the bottle cap and the outer wall of the bottle body is eliminated by the sealing structure, so that the barrier layer 1 and the barrier layer 2 are in contact and continuous on the outer wall of the plastic bottle, that is, the barrier coating with strong barrier property is complete and continuous on the outer wall of the plastic bottle, thereby fully barrier covering the outer wall of the plastic bottle, achieving the maximum improvement of the barrier property of the plastic bottle, improving the packaging quality of the plastic bottle, and also improving the external sealing property of the plastic bottle, preventing the infiltration of external bacteria, and ensuring drinking safety. The present solution realizes comprehensive barrier coverage of the plastic bottle through the cooperation of the sealing part, the sealing convex ring and the sealing structure. Compared with the prior art, the plastic bottle of the present solution has improved barrier property at a lower cost, a wide range of application, strong practicality, and is suitable for wide promotion and application.

[0022] In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] FIG1 is a schematic structural diagram of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0025] FIG2 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0026] FIG3 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0027] FIG4 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0028] FIG5 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0029] FIG6 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0030] FIG7 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention;

[0031] FIG8 is a schematic cross-sectional view of a high barrier plastic bottle according to a preferred embodiment of the present invention.

[0032] Legend: 100, bottle cap; 110, abutment ring 1; 120, barrier layer 1; 130, first sealing ring; 140, second sealing ring; 150, sealing ring; 160, internal thread structure; 170, sealing protrusion; 180, sealing cone surface 1; 190, sealing spherical surface; 200, bottle body; 210, abutment ring 2; 220, barrier layer 2; 230, external thread structure; 240, stabilizing groove; 250, plug-in outer ring. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below.

[0034] Figure 1 is a schematic structural diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 2 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 3 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 4 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 5 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 6 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 7 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention; Figure 8 is a schematic cross-sectional diagram of a high-barrier plastic bottle according to a preferred embodiment of the present invention.

[0035] As shown in Figures 1 to 3, the high-barrier plastic bottle of this embodiment includes a bottle cap 100 and a bottle body 200 with a top opening. The bottle cap 100 is connected to the bottle body 200 and is used to seal the top opening of the bottle body 200. A barrier layer 120 is provided on the outer wall of the bottle cap 100, and a barrier layer 220 is provided on the outer wall of the bottle body 200. A sealing structure is provided between the bottle cap 100 and the bottle body 200 for making the barrier layer 120 and the barrier layer 220 contact and continuously on the outer wall of the plastic bottle, thereby providing comprehensive barrier coverage for the outer wall of the plastic bottle. Specifically, in the high barrier plastic bottle of the present invention, the material is filled into the bottle body 200 through the top opening of the bottle body 200. After the material filling is completed, the bottle cap 100 is connected to the bottle body 200 to seal the top opening of the bottle body 200 through the bottle cap 100 to complete the packaging of the material. After the bottle cap 100 is connected to the bottle body 200, the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200 is eliminated by the sealing structure, so that the barrier layer 120 and the barrier layer 220 are in continuous contact on the outer wall of the plastic bottle, that is, the barrier coating with strong barrier properties is The outer wall of the plastic bottle is completely continuous, thus providing comprehensive barrier coverage, maximizing the barrier properties of the plastic bottle, improving the packaging quality of the plastic bottle, and also enhancing the external sealing of the plastic bottle, preventing the infiltration of external bacteria and ensuring drinking safety. This solution achieves comprehensive barrier coverage of the plastic bottle through the coordinated cooperation of the sealing portion, the sealing convex ring, and the sealing structure. Compared with the existing technology, the plastic bottle of this solution has improved barrier properties while being relatively low in cost, has a wide range of applications, is highly practical, and is suitable for widespread promotion and application. It should be understood that the barrier coating includes barrier layer 120 and barrier layer 220. It should be understood that the barrier layer is formed by external plating of a high-barrier material such as silica. Optionally, the bottle cap 100 includes a top cap for sealing the top opening of the bottle body 200 and a side cap detachably connected to the bottle body 200, the top cap and the side cap being integrally injection molded, and the abutment ring 110 being arranged on the end of the side cap facing the bottle body 200 so that when the abutment ring 210 and the abutment ring 110 abut, the outer wall of the abutment ring 110 and the outer wall of the abutment ring 210 are in contact and continuous, thereby making the barrier coating complete and continuous on the outer wall of the plastic bottle. Optionally, the bottle cap 100 includes a top cap for sealing the top opening of the bottle body 200 and a side cap detachably connected to the bottle body 200, the top cap and the side cap being integrally injection molded. Optionally, an internal thread structure 160 is arranged on the inner wall of the side cap, and an external thread structure 230 is arranged on the outer wall of the bottle body 200, and the internal thread structure 160 and the external thread structure 230 are threadedly connected to ensure a reliable connection. Optionally, in another embodiment, the side cover is connected to the bottle body 200 by clamping. It should be understood that the high barrier plastic bottle of this embodiment can be used for packaging materials with high barrier requirements such as beer and milk due to its improved barrier properties.It should be understood that if bottle cap 100 is a cover structure with a plug, it can also be used as a cillin bottle for the packaging of medicines such as vaccines, powder injections, biological agents and freeze-dried medicines. Optionally, plastic bottle is a cillin bottle, and bottle cap 100 includes a receiving chamber, a plug arranged in the receiving chamber, and a sealing structure for sealing the plug, and vaccines, powder injections, biological agents and freeze-dried medicines are packaged by plastic bottle. It should be understood that the sealing structure can be only arranged on bottle cap 100, further contacting and sealing with bottle 200, or only arranged on bottle 200, to contact and seal with bottle cap 100, or it can be arranged in the interval between bottle cap 100 and bottle 200, to contact with bottle 200 and bottle cap 100 respectively by sealing structure, indirectly realize the sealing between bottle 200 and bottle cap 100.

[0036] As shown in Figures 1 to 3, in this embodiment, the sealing structure includes an abutment ring 110 disposed on the end of the bottle cap 100 facing the bottle body 200, and an abutment ring 210 protruding from the outer wall of the bottle body 200 for abutting and sealing with the abutment ring 110. Specifically, after the bottle cap 100 and the bottle body 200 are connected, the abutment ring 110 is synchronously abutted and sealed with the abutment ring 210, thereby minimizing the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200 through the abutment pressure, so that the barrier layer 120 and the barrier layer 220 are in continuous contact on the outer wall of the plastic bottle, thereby providing comprehensive barrier coverage of the outer wall of the plastic bottle. Optionally, abutment ring 110 is positioned on the end of the side cap facing the bottle body 200, so that when abutment ring 210 abuts abutment ring 110, the outer wall of abutment ring 110 and the outer wall of abutment ring 210 are in contact and continuous, thereby ensuring a complete and continuous barrier coating on the outer wall of the plastic bottle. It should be understood that the stronger the sealing performance between abutment ring 110 and abutment ring 210, the greater the structural support provided for barrier layer 120 and barrier layer 220 to fully barrier the plastic bottle. It should be understood that the abutting end surfaces of abutment ring 110 and abutment ring 210 match to ensure a strong sealing performance after abutment. It should be understood that, as shown in Figure 1, after the abutment ring 110 and the abutment ring 2 210 are abutted and sealed, the portion of the outer wall of the bottle body 200 that is in contact with the external gas is provided with the barrier layer 220, and the portion of the outer wall of the bottle body 200 that is not in contact with the external gas is shielded by the bottle cap 100, and under the action of the abutment ring 110 and the abutment ring 2 210, there is no gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, and then under the action of the barrier layer 120 and the barrier layer 2 220, the plastic bottle can be fully blocked and covered, that is, the abutment ring 110, the abutment ring 2 210, the barrier layer 1 120 and the barrier layer 2 220 cooperate to achieve full blocking coverage of the plastic bottle. Optionally, in this embodiment, the abutment ring 110 and the bottle cap 100 are integrally formed using an injection molding process. In another embodiment, the abutment ring 110 and the bottle cap 100 are split structures, and the abutment ring 110 is fixed to the abutment ring 2 210 under the pressure of the bottle cap 100.

[0037] As shown in Figures 1 to 3, in this embodiment, the abutment ring 110 is an elastomer for elastically abutting and sealing with the abutment ring 2 210. It should be understood that the elastomer is made of an elastic material such as rubber. Specifically, the elastic abutment and sealing between the elastomer and the abutment ring 2 210 improves the external sealing of the plastic bottle, prevents external gas from penetrating through the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, and provides structural support for the comprehensive barrier coverage of the plastic bottle. Optionally, the abutment ring 110 and the bottle cap 100 are integrally formed using a two-material injection molding process to ensure structural reliability. Optionally, in another embodiment, the abutment ring 110 and the bottle cap 100 are a split structure, and the abutment ring 110 elastically abuts and seals with the abutment ring 2 210 under the pressure of the bottle cap 100. As shown in Figures 1 to 3, in this embodiment, the abutment ring 2 210 is an elastomer for elastically abutting and sealing with the abutment ring 1 110. Specifically, the elastic abutment seal between the abutment ring 110 and the elastomer improves the external sealing performance of the plastic bottle and prevents external gas from penetrating through the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200. Optionally, the abutment ring 110 and the sealing protrusion 170 are both made of elastomers to maximize the external sealing performance of the plastic bottle and prevent external gas from penetrating through the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, thereby providing structural support for the comprehensive barrier coverage of the plastic bottle. It should be understood that when the abutment ring 110 and the abutment ring 2 210 elastically abut against each other, under the action of elastic deformation, the uneven end faces of the abutment ring 110 and the abutment ring 2 210 caused by insufficient processing precision during the injection molding process can be compensated, thereby reducing the process difficulty and facilitating processing and manufacturing. As shown in Figure 4 , in this embodiment, the end surface of abutment ring 110 facing abutment ring 210 is inclined surface 1, while the end surface of abutment ring 210 facing abutment ring 110 is inclined surface 2, designed to mate with inclined surface 1. Specifically, the surface-to-surface contact between abutment ring 110 and abutment ring 210 increases the sealing area. Furthermore, inclined surfaces are more difficult to penetrate than horizontal surfaces, thereby improving the sealing between abutment ring 110 and abutment ring 210, providing structural support for comprehensive barrier coverage of the plastic bottle.

[0038] As shown in Figure 5, in this embodiment, the end of abutment ring 110 facing abutment ring 210 is provided with a protruding abutment protrusion, and the end of abutment ring 210 facing abutment ring 110 is provided with a recessed abutment groove for inserting and mating with the protruding abutment protrusion. Specifically, the inserting and mating of the protruding abutment protrusion and the groove between abutment ring 110 and abutment ring 210 increases the sealing area. Furthermore, the curved surface is more difficult for gas to penetrate than the horizontal surface, thereby improving the sealing between abutment ring 110 and abutment ring 210, providing structural support for comprehensive barrier coverage of the plastic bottle.

[0039] As shown in Figure 7, in this embodiment, the sealing structure includes a first sealing tapered surface 180, which is arranged obliquely on the end face of the bottle cap 100 facing the bottle body 200, and a second sealing tapered surface, which is arranged obliquely on the outer wall of the bottle body 200 and is configured to form a surface-to-surface seal with the first sealing tapered surface 180. Specifically, after the bottle cap 100 and the bottle body 200 are connected, the first sealing tapered surface 180 and the second sealing tapered surface simultaneously form a surface-to-surface seal, eliminating the gap between the outer walls of the bottle cap 100 and the bottle body 200. Furthermore, the tapered surfaces are relative to the horizontal plane, significantly increasing the difficulty of gas infiltration, thereby improving the seal between the outer walls of the bottle cap 100 and the bottle body 200 and providing structural support for comprehensive barrier coverage of the plastic bottle. It should be understood that when the upper end face of the bottle body 200 is tapered, the second sealing tapered surface constitutes a portion of the upper shoulder of the bottle body 200, eliminating the need for additional machining, thereby simplifying the process of enlarging the bottle body 200 and facilitating manufacturing.

[0040] As shown in FIG8 , in this embodiment, the sealing structure includes an insert outer ring 250 arranged on the outer wall of the bottle body 200 for enclosing with the outer wall of the bottle body 200 to form a sealed cavity with an opening facing the bottle cap 100, and an insert inner ring arranged on the end of the bottle cap 100 facing the bottle body 200 for inserting into the sealed cavity to form a surface-to-surface seal with the insert outer ring 250. Specifically, the sealed cavity is formed by the insert outer ring 250, so that after the insert inner ring is inserted into the sealed cavity, the insert outer ring 250 and the insert inner ring are surface-to-surface sealed to eliminate the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, thereby improving the sealing between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, and providing structural support for the comprehensive barrier coverage of the plastic bottle. Optionally, the insert outer ring 250 and / or the insert inner ring are elastomers to achieve an elastic fit seal. Preferably, the bottom of the sealing cavity is in abutment with the end face of the plug-in inner ring, that is, a surface-to-surface seal is achieved while achieving a surface-to-surface seal, thereby further improving the sealing between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200 and ensuring a reliable seal. It should be understood that since the plug-in cavity formed by the plug-in outer ring 250 is plugged into the plug-in inner ring, the plug-in outer ring 250 can limit the plug-in inner ring in the radial direction, thereby further improving the reliability of the bottle cap 100 and the bottle body 200 after assembly.

[0041] As shown in FIG6 , in this embodiment, the sealing structure includes a spherical sealing surface 190 curved and arranged on the end face of the bottle cap 100 facing the bottle body 200, which is used to match the shape of the outer wall of the bottle body 200. Specifically, after the bottle cap 100 and the bottle body 200 are connected, the spherical sealing surface 190 is synchronously fitted and sealed with the spherical outer wall of the bottle body 200, thereby eliminating the gap between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200 without changing the structure of the bottle body 200, thereby improving the seal between the outer wall of the bottle cap 100 and the outer wall of the bottle body 200, and providing structural support for the comprehensive barrier coverage of the plastic bottle. It should be understood that the bottle shoulder on the bottle body 200 of the plastic bottle is generally spherical, so the spherical sealing surface 190 can directly fit and seal with the bottle shoulder of the bottle body 200, making assembly simple and convenient, and highly practical.

[0042] In this embodiment, the plastic bottle also includes anti-theft labels bonded to the outer walls of the bottle cap 100 and the outer walls of the bottle body 200, respectively. Specifically, the anti-theft labels indicate the bottle's usage status and prevent improper opening. It should be understood that if the plastic bottle in this embodiment were sealed with an anti-theft ring, a gap would exist between the outer walls of the bottle cap 100 and the outer walls of the bottle body 200, preventing complete barrier coverage.

[0043] As shown in Figures 1 to 3, in this embodiment, a stabilizing groove 240 is formed on the bottom of the bottle body 200. Specifically, the stabilizing groove 240 is formed on the bottom of the bottle body 200 so that the radial cross-section of the bottom of the bottle body 200 is triangular, thereby improving the stability of the plastic bottle when placed vertically.

[0044] As shown in FIG2 , in this embodiment, a first sealing ring 130 and a second sealing ring 140 are convexly provided on the inner top wall of the bottle cap 100. The first sealing ring 130 and the second sealing ring 140 are arranged at intervals. The inner wall of the first sealing ring 130 and the outer wall of the bottle body 200 are fitted and sealed, and the outer wall of the second sealing ring 140 and the inner wall of the bottle body 200 are fitted and sealed. Specifically, the first sealing ring 130, the second sealing ring 140 and the inner top wall of the bottle cap 100 enclose a plug-in cavity to be plugged and matched with the top of the bottle body 200, and the inner wall of the first sealing ring 130 and the outer wall of the bottle body 200 are fitted and sealed, and the outer wall of the second sealing ring 140 and the inner wall of the bottle body 200 are fitted and sealed, thereby improving the internal sealing between the bottle body 200 and the bottle cap 100.

[0045] As shown in FIG2 , in this embodiment, a sealing protrusion 170 is provided on the inner top wall of the bottle cap 100 between the first sealing ring 130 and the second sealing ring 140 for elastically contacting and sealing with the top wall of the bottle body 200. Specifically, the sealing protrusion 170 is in close contact with the top wall of the bottle body 200 to achieve a three-sided seal, further improving the internal sealing between the bottle body 200 and the bottle cap 100.

[0046] As shown in Figure 2, in this embodiment, the corner between the end of the second sealing ring 140 facing the bottle body 200 and the inner wall of the second sealing ring 140 is chamfered. Specifically, the chamfer guides the bottle body 200 when inserted into the insertion cavity, thereby reducing the difficulty of assembly.

[0047] As shown in FIG3 , in this embodiment, a sealing ring 150 is convexly provided on the inner top wall of the bottle cap 100 and is elastically abutted and sealed with the top wall of the bottle body 200. Specifically, after the bottle cap 100 is connected to the bottle body 200, the sealing ring 150 elastically abuts and seals with the top wall of the bottle body 200 to improve the internal sealing between the bottle body 200 and the bottle cap 100. Optionally, the sealing ring 150 is made of an elastic material such as rubber. Optionally, the radial length of the sealing ring 150 is greater than the radial length of the top wall of the bottle body 200. After the sealing ring 150 and the top wall of the bottle body 200 elastically abut, the sealing ring 150 elastically deforms. Since the radial length of the sealing ring 150 is greater than the radial length of the top wall of the bottle body 200, a semi-wrapped seal is achieved on the top wall of the bottle body 200, further improving the internal sealing between the bottle body 200 and the bottle cap 100.

[0048] The beer bottle of this embodiment comprises the aforementioned high-barrier plastic bottle. Specifically, by using the aforementioned high-barrier plastic bottle to package beer, the beer bottle of this embodiment has a lower manufacturing cost, is less prone to damage, is easier to transport, and has excellent barrier properties, ensuring storage quality, compared to existing glass beer packaging.

[0049] The manufacturing method of the high-barrier plastic bottle of this embodiment is used to manufacture the above-mentioned high-barrier plastic bottle, and specifically includes the following steps: S1, using an injection molding process to injection mold a bottle cap 100, a bottle body 200, and a sealing structure between the bottle cap 100 and the bottle body 200; S2, plating a barrier layer 120 on the outer wall of the bottle cap 100, and after the bottle body 200 is filled with material, the bottle cap 100 seals the bottle body 200 to obtain a plastic bottle; S3, using the bottle cap 100 as a supporting base to support the plastic bottle, and then plating the plastic bottle to form a barrier layer 220 on the outer wall of the bottle body 200. It should be understood that in this embodiment, barrier layer 120 is first plated on the outer wall of bottle cap 100, and then barrier layer 220 is formed on the outer wall of bottle body 200 by coating the entire plastic bottle after the bottle body 200 is sealed. This means that a single coating process achieves comprehensive barrier coverage of the plastic bottle with the barrier coating. It should be understood that if barrier layer 120 is not plated before bottle cap 100 seals bottle body 200, and coating is performed after the bottle body 200 and bottle cap 100 are sealed, then regardless of whether the bottle cap 100 or the bottle body 200 is used as the support base, the entire plastic bottle must be coated first, then flipped over, and then coated a second time. This significantly increases the coating area, complicates the process, and reduces manufacturing efficiency. It should be understood that if the bottle body 200 is plated separately rather than as a whole, that is, after injection blow molding, the bottle body 200 is plated first and then filled and sealed, an additional sterilization process is required after the bottle body 200 is plated to ensure the quality of filling and sealing. However, the plastic bottle of this solution can be formed in a single aseptic vacuum package using an integrated injection blow filling and sealing machine, which simplifies the process flow and improves manufacturing efficiency. It should be understood that the sterilization process has relevant standards for sterilization time, sterilization temperature, and sterilization process, which greatly increases the time and complexity of the entire manufacturing cycle, thereby resulting in low plastic bottle manufacturing efficiency.

[0050] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A high barrier plastic bottle, characterized in that: The invention comprises a bottle cap (100) and a bottle body (200) with a top opening, wherein the bottle cap (100) is connected to the bottle body (200) and is used to seal the top opening of the bottle body (200), a barrier layer 1 (120) is provided on the outer wall of the bottle cap (100), and a barrier layer 2 (220) is provided on the outer wall of the bottle body (200), and a sealing structure is provided between the bottle cap (100) and the bottle body (200) for making the barrier layer 1 (120) and the barrier layer 2 (220) contact and continuously on the outer wall of the plastic bottle, thereby fully barrier-covering the outer wall of the plastic bottle.

2. The high barrier plastic bottle according to claim 1, characterized in that: The sealing structure comprises an abutment ring 1 (110) arranged on the end of the bottle cap (100) facing the bottle body (200) and an abutment ring 2 (210) protruding from the outer wall of the bottle body (200) and used for abutting and sealing with the abutment ring 1 (110).

3. The high barrier plastic bottle according to claim 2, characterized in that: The abutment ring 1 (110) is an elastic body for elastically abutting and sealing with the abutment ring 2 (210); and / or The second abutting ring (210) is an elastic body and is used for elastically abutting and sealing with the first abutting ring (110).

4. The high barrier plastic bottle according to claim 2, characterized in that: The end surface of the abutting ring 1 (110) toward the abutting ring 2 (210) is an inclined surface 1 arranged obliquely, and the end surface of the abutting ring 2 (210) toward the abutting ring 1 (110) is an inclined surface 2 arranged obliquely for contacting with the inclined surface 1.

5. The high barrier plastic bottle according to claim 2, characterized in that: The end of the abutting ring 1 (110) facing the abutting ring 2 (210) is provided with an abutting protrusion, and the end of the abutting ring 2 (210) facing the abutting ring 1 (110) is provided with an abutting groove for plugging and matching with the abutting protrusion.

6. The high barrier plastic bottle according to claim 1, characterized in that: The sealing structure comprises a sealing conical surface 1 (180) obliquely arranged on the end surface of the bottle cap (100) facing the bottle body (200), and a sealing conical surface 2 obliquely arranged on the outer wall of the bottle body (200) for surface-to-surface sealing with the sealing conical surface 1 (180).

7. The high barrier plastic bottle according to claim 1, characterized in that: The sealing structure comprises an inserting outer ring (250) arranged on the outer wall of the bottle body (200) and used to enclose the outer wall of the bottle body (200) to form a sealing cavity with an opening facing the bottle cap (100); and an inserting inner ring arranged on the end of the bottle cap (100) facing the bottle body (200) and used to be inserted into the sealing cavity to form a surface-to-surface sealing with the inserting outer ring (250).

8. The high barrier plastic bottle according to claim 1, characterized in that: The sealing structure comprises a sealing spherical surface (190) curvedly arranged on the end surface of the bottle cap (100) facing the bottle body (200) and used to match the shape of the outer wall of the bottle body (200).

9. The high barrier plastic bottle according to claim 1, characterized in that: The plastic bottle further comprises anti-theft labels respectively bonded to the outer wall of the bottle cap (100) and the outer wall of the bottle body (200).

10. The high barrier plastic bottle according to claim 1, characterized in that: A first sealing ring (130) and a second sealing ring (140) are convexly provided on the inner top wall of the bottle cap (100), the first sealing ring (130) and the second sealing ring (140) are arranged at intervals, the inner wall of the first sealing ring (130) and the outer wall of the bottle body (200) are fitted and sealed, and the outer wall of the second sealing ring (140) and the inner wall of the bottle body (200) are fitted and sealed.

11. The high barrier plastic bottle according to claim 10, characterized in that: A sealing protrusion (170) is provided on the inner top wall of the bottle cap (100) between the first sealing ring (130) and the second sealing ring (140) for elastically contacting and sealing with the top wall of the bottle body (200).

12. The high barrier plastic bottle according to claim 1, characterized in that: A sealing ring (150) is convexly provided on the inner top wall of the bottle cap (100) and is elastically abutted and sealed against the top wall of the bottle body (200).

13. A beer bottle, characterized in that: A high-barrier plastic bottle according to claim 1.

14. A method for manufacturing a high barrier plastic bottle, characterized in that: Used to manufacture the high barrier plastic bottle according to claim 1, specifically The following steps are involved: S1, using an injection molding process to separately mold the bottle cap (100), the bottle body (200), and the sealing structure between the bottle cap (100) and the bottle body (200); S2, coating the outer wall of the bottle cap (100) with a barrier layer (120), and after the bottle body (200) is filled with the material, the bottle cap (100) seals the bottle body (200) to obtain a plastic bottle; S3, using the bottle cap (100) as a supporting base point to support the plastic bottle, and then performing external plating on the plastic bottle to form a second barrier layer (220) on the outer wall of the bottle body (200).

Images