Bubble cap package for gel food

Abstract

The utility model provides a gel food blister package which comprises a shell, a sealing opening of the shell extends outwards to form a sealing face, and the sealing face is sealed by attaching a cover film in a heat sealing mode. A corrugated ring is arranged on the edge of the inner side of a sealed opening of the shell, an annular groove is formed in the corrugated ring, and the interior of the annular groove is divided into 2-4 independent cavities through circumferential partitions. A non-heat-sealing area is arranged on the periphery of the cover film and the sealing face, the shells and the cover film are connected through tearing lines, and a groove which is communicated with the interiors of the shells and extends towards the non-heat-sealing area is formed between the sealing face and the non-heat-sealing area. And a bump array is arranged between the cover film and the sealing surface. Certain deformation quantity is given to the blister package in a corrugated ring and annular groove transition mode, so that a buffer space is formed, stress is dispersed, and cover film collapse or sealing failure is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of packing, in particular to a gel food bubble pack. BACKGROUND

[0002] As shown in the bubble pack for at least one gum-type pharmaceutical or food supplement product disclosed in the invention patent application with publication number CN115605172A, the bubble pack usually includes a cover film and a shell, the contents of the package are placed inside the shell, and then the shell is closed by the cover film. Bubble packs are widely used in the fields of medicine, food, cosmetics, etc. They have good sealing performance, can effectively protect the contents from the external environment, and prolong the shelf life of the product. However, when bubble packs are applied to gel food, in order to facilitate assembly line operation and prevent the flowing gel from spilling during transportation, hot filling + immediate sealing is often used. Gel food is filled as a gelatinous fluid, and its volume will shrink after cooling. At this time, a negative pressure is generated, causing the cover film to collapse and deform, and thus causing the heat-sealed part to break. The ways to solve the above problems for jelly and other bubble packs include: (1) using konjac gum, gellan gum, etc. with low shrinkage rate, which will affect the taste and flavor of the food; (2) injecting a small amount of nitrogen gas to balance the air pressure, but the equipment cost is high; (3) extending the heat sealing time to improve the heat sealing strength, but it is easy to appear difficult to tear or unexpected rupture.

[0003] The applicant's prior application, namely the invention patent application with publication number CN116552081A, also discloses a single polyethylene (PE) material composite packaging film. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the shortcomings of the prior art, providing a gel food bubble pack to solve the technical problem of easy collapse and breakage of the cover film during hot filling of the gel food inside.

[0005] To achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

[0006] A gel food bubble pack, comprising a shell, the shell is provided with a seal, the seal is provided with a sealing surface extending outward, the sealing surface is provided with a cover film for heat sealing and lamination to close the shell, the inner side edge of the shell seal is provided with a corrugated ring, and the corrugated ring forms an annular groove on the inner side of the shell.

[0007] Further, the annular groove is provided with a plurality of partitions in the circumferential direction, and the plurality of partitions divide the annular groove into a plurality of cavities. Preferably, the cavities are arranged in a circumferential array with 2-4 cavities.

[0008] Further, the depth of the annular groove gradually increases in the direction from the shell to the cover film.

[0009] Further, the cover film and the outer periphery of the sealing surface are also provided with a non-heat sealing area, a plurality of blister packaging non-heat sealing area cover films are integrally connected through a tear line, and the non-heat sealing area cover film and the sealing area are separably arranged.

[0010] Further, the sealing surface and the non-heat sealing area are provided with a groove along the radial direction of the shell, one end of the groove is arranged in communication with the inside of the shell, and the other end of the groove extends to the non-heat sealing area and is arranged separately from the non-heat sealing area through the heat sealing area.

[0011] Further, a plurality of the shells are integrally connected through the side wall of the sealing surface, and a tear line is arranged between adjacent shells.

[0012] Further, the sealing surfaces of a plurality of the shells are densely arranged.

[0013] Further, a plurality of convex point arrays are densely arranged between the cover film and the sealing surface.

[0014] Further, the cover film is a polyethylene composite film, the shell is a polyethylene plastic shell, and the wall thickness of the polyethylene plastic shell is ≤0.2 mm.

[0015] The advantages and beneficial effects of the utility model lie in:

[0016] 1. The utility model discloses a corrugated ring and an annular groove, utilize the elastic absorption pressure fluctuation of corrugated structure, transition to annular groove structure to the stress concentration point of sealing, reduce the risk of direct stress of sealing surface. The annular groove can also provide a deformation buffer space to avoid direct impact on the sealing surface due to volume changes and allow the shell to deform moderately without affecting the sealing integrity.

[0017] 2. The annular groove can be recessed in the shell during molding to separate the annular groove into multiple cavities, avoiding stress concentration transmission when a single continuous annular groove is under pressure.

[0018] 3. Multiple sets of shells and cover films are integrally connected through tear lines, suitable for continuous production, and users can easily tear off single-particle packaging; the dense layout of the sealing surface reduces waste of leftover materials and improves material utilization. The convex point array increases the heat sealing area between the cover film and the sealing surface, thereby improving the sealing effect.

[0019] 4. One end of the groove communicates with the annular groove, and the other end is separated from the non-heat sealing area. The groove allows stress concentration points on the sealing surface, making it easier for users to remove the heat-sealed cover film and shell from the non-heat sealing area. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic diagram of the utility model;

[0021] Fig. 2 This is a disassembly diagram of the present invention;

[0022] Fig. 3 This is a cross-sectional structural schematic diagram of the present invention;

[0023] In the diagram: 1. Shell; 2. Sealing surface; 3. Cover film; 4. Corrugated ring; 5. Annular groove; 6. Partition; 7. Cavity; 8. Non-heat-sealed area; 9. Tear line; 10. Groove; 11. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0025] Example 1

[0026] like Figs. 1 to 3 As shown, the gel food blister packaging of this embodiment includes a shell 1. The open end of the shell 1 is provided with a sealing slit 2. The sealing slit 2 extends outward to form a sealing surface 3. The sealing surface 3 is bonded to the cover film 4 by a heat sealing process, so that the shell 1 forms a closed space. The inner edge of the sealing slit 2 of the shell 1 is provided with an inwardly recessed corrugated ring 5, which forms a continuous annular groove 6 on the inner side of the shell 1. The cross-section of the annular groove 6 is U-shaped and the depth is 0.5-1 mm, which transitions the stress concentration point at the sealing slit to the annular groove structure and reduces the risk of hot air failure. The shell 1 is made of polyethylene plastic shell with a wall thickness of 0.15 mm, and the cover film 4 is a polyethylene composite film with a thickness of 100 μm.

[0027] Example 2

[0028] The only difference from Embodiment 1 is that the annular groove 6 has three partitions 7 circumferentially. The partitions 7 are protruding structures arranged radially along the annular groove 6, dividing the annular groove 6 into three independent cavities 8. The cavities 8 are evenly distributed in a 0° circle, and each cavity 8 has an equal volume, avoiding local stress concentration that could lead to deformation of the cover membrane 4 or sealing failure.

[0029] Example 3

[0030] The only difference from Example 1 is that the depth of the annular groove 6 gradually increases along the direction from the shell 1 to the cover membrane 4, forming a sloping structure. The initial depth of the gas storage groove 6 is 0.3 mm, and the final depth is 0.8 mm.

[0031] Example 4

[0032] The difference from the embodiment 1 is that the lid film 4 is provided with a non-heat sealing area 9 at the outer periphery of the sealing surface 3, and the lid films 4 of the plurality of blister packs at the non-heat sealing area 9 are integrally connected through a pre-pressed tear line 10. The lid film at the non-heat sealing area 9 can be separated from the sealing surface, and the user can easily separate the individual blister pack when tearing along the tear line 10. A radially extending groove 11 is provided between the sealing surface 3 and the non-heat sealing area 9, one end of the groove 11 is in communication with the inside of the shell 1, and the other end extends to the edge of the non-heat sealing area 9 but is blocked by the heat sealing area.

[0033] Embodiment 5

[0034] On the basis of the embodiment 1, the contact surface of the lid film 4 and the sealing surface 3 is provided with a dense array of convex points with a diameter of 0.2 mm and a height of 0.05-0.15 mm. The convex point array is formed by mold pressing, and the mold surface is processed with a laser engraving or chemical etching process to form a dense array of pits on the corresponding position of the metal mold (such as stainless steel or aluminum), and the pit shape is complementary to the convex point to increase the friction between the lid film 4 and the sealing surface 3, making the fit after heat sealing more closely, while reducing the risk of accidental peeling.

[0035] The above embodiments preferably use the polyethylene composite film described in the cited invention patent in the background art, which includes a composite layer, a middle layer, and a heat sealing layer arranged in sequence.

[0036] The composite layer has a thickness of 7-10 μm and is made of a 50% HDPE + 20%-30% LLDPE + 10%-20% LDPE melt blend;

[0037] The middle layer has a thickness of 14-20 μm and is made of a 70%-80% HDPE + 20%-30% LDPE melt blend;

[0038] The heat sealing layer has a thickness of 7-10 μm and is made of a 70%-80% HDPE + 10%-15% PB-1 + 5%-10% AC melt blend.

[0039] The composite layer uses a high proportion of HDPE and a low proportion of LLDPE+LDPE to stabilize the film bubble during the blowing process and provide part of the stiffness. The middle layer uses a high proportion of HDPE and a low proportion of LDPE to mainly provide PE stiffness, while increasing the density and crystallinity of the core layer, reducing the amorphous region of the core layer, and reducing the free volume, thereby delaying the migration of the AC component of the heat sealing layer to the composite layer.

[0040] The heat-sealing layer uses high proportion of HDPE and partial PB-1 melt blending, so that HDPE and PB-1 form a complete phase separation island-in-sea structure distribution, and the heat-sealing layer achieves the effect of easy peeling of the heat-sealing mouth; the AC component of the partial proportion of the heat-sealing layer is a blend of monocarboxylic acid (C6-C22) polyglycerol ester and silicate, and due to the existence of the multi-crystal region of the middle layer and the heat-sealing layer, the free volume is very small, and the oil component will preferentially migrate to the surface of the heat-sealing layer, so as to form a very thin diaphragm between the heat-sealing layer and the content, which has a similar effect to "demoulding", and can prevent the gel food from adhering to the surface of the cover film.

[0041] The following is a preparation example of the cover film:

[0042]

[0043] The above only is the preferred embodiment of the present application, it should be pointed out, for the ordinary skilled in the art, without departing from the technical principles of the present application, under the premise of, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A gel food blister packaging, comprising a shell (1), wherein the shell (1) is provided with a sealing opening (2), the sealing opening (2) extends outward to provide a sealing surface (3), and the sealing surface (3) is heat-sealed with a cover film (4) to seal the shell (1); characterized in that, A corrugated ring (5) is provided on the inner edge of the sealing (2) of the shell (1), and the corrugated ring (5) forms an annular groove (6) on the inner side of the shell (1).

2. The gel food blister packaging according to claim 1, characterized in that, The annular groove (6) is provided with a plurality of partitions (7) along the circumferential direction, and the plurality of partitions (7) divide the annular groove (6) into a plurality of cavities (8).

3. The blister packaging for gel foods according to claim 2, characterized in that, The cavity (8) is arranged in a circular array of 2-4 evenly distributed cavities.

4. The blister packaging for gel foods according to claim 1, characterized in that, The depth of the annular groove (6) gradually increases along the direction from the shell (1) toward the cover membrane (4).

5. The gel food blister packaging according to claim 1, characterized in that, The outer periphery of the cover film (4) and the sealing surface (3) is also provided with a non-heat-sealed area (9). The cover film (4) of the non-heat-sealed area (9) of multiple blister packs is integrally connected by a tear line (10). The cover film (4) of the non-heat-sealed area (9) and the sealing area can be separated.

6. The blister packaging for gel foods according to claim 5, characterized in that, The sealing surface (3) and the non-heat-sealed area (9) are provided with grooves (11) in the radial direction of the shell (1). One end of the groove (11) is connected to the interior of the shell (1), and the other end of the groove (11) extends toward the non-heat-sealed area (9) and is separated from the non-heat-sealed area (9) by the heat-sealed area.

7. The gel food blister packaging according to claim 1, characterized in that, Multiple housings (1) are integrally connected by the sidewalls of the sealing surface (3), and tear lines (10) are provided between adjacent housings (1).

8. The gel food blister packaging according to claim 7, characterized in that, The sealing surfaces (3) of the multiple shells (1) are densely arranged on the outer periphery of the shells (1).

9. The gel food blister packaging according to claim 1, characterized in that, A dense array of protrusions is provided between the cover film (4) and the sealing surface (3).

10. The gel food blister packaging according to claim 1, characterized in that, The cover (4) is made of polyethylene composite film, and the shell (1) is made of polyethylene plastic shell with a wall thickness ≤0.2 mm.

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