A tear-resistant sealing gasket

Abstract

This utility model relates to the field of production and packaging technology, specifically to a tear-resistant sealing gasket, comprising a device body, which is composed of a support layer, a barrier layer, and a heat-sealing layer stacked sequentially. The surface of the device body is sequentially stacked with a tear-resistant reinforcement layer, an easy-tear structural layer, and a surface protective layer. This utility model, through the composite design of the tear-resistant reinforcement layer and the easy-tear structural layer, achieves a precise and controllable tear path upon opening while ensuring damage resistance during transportation and storage. This solves the contradiction between tear resistance and easy opening in traditional gaskets. Simultaneously, the barrier layer combined with the heat-sealing layer forms a double sealing barrier, effectively blocking the penetration of oxygen and water vapor, extending the shelf life of the contents, and further eliminating the risk of interlayer peeling, ensuring the reliability of a lifetime seal.

Description

Technical Field

[0001] This utility model relates to the field of production and packaging technology, specifically to a tear-resistant sealing gasket. Background Technology

[0002] In the prior art, tear-resistant sealing gaskets are a type of sealing material specifically designed for packaging containers. Their main function is to provide good sealing performance, while also being easy to open and not easily torn. These gaskets are commonly used in the packaging of food, pharmaceuticals, cosmetics, and other products that need to maintain the freshness of their contents and prevent leakage.

[0003] The authorized publication number "CN210175540U" describes "a sealing gasket". The sealing gasket includes an adhesive layer, an aluminum layer and a backing layer stacked in sequence. The backing layer is provided with a handle, an annular cut line and a linear cut line. The backing layer is divided into an outer ring and an inner ring for re-sealing by the annular cut line. The handle is located in the area enclosed by the annular cut line. The root of the handle is connected to the inner ring. The annular cut line has a starting end and an ending end that are staggered. One end of the linear cut line is connected to the side of the handle, and the other end of the linear cut line is connected to the ending end. Because the annular cut line has radially staggered start and end points, a connecting block is formed between the outer and inner rings during resealing. This prevents the outer and inner rings from separating during resealing and avoids localized pulling of the aluminum layer, thus keeping the sealing gasket flat after sealing. The connecting block pulls the end of the inner ring tight onto the outer ring during resealing, which is equivalent to pressing by hand. This concentrates the tearing force on the aluminum layer and makes it easier to tear the aluminum layer.

[0004] The aforementioned patent has certain shortcomings in its use. It can only concentrate the tearing force on the aluminum layer, but it does not increase the function of inhibiting microbial growth. It cannot meet the antibacterial requirements of food and drug safety for packaging materials, and there is a risk of surface contamination during long-term storage. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides a tear-resistant sealing gasket that forms a double sealing barrier through a barrier layer combined with a heat-sealing layer. This effectively blocks the penetration of oxygen and water vapor, extends the shelf life of the contents, further eliminates the risk of interlayer peeling, and ensures the reliability of a lifetime seal. It effectively solves the problems in existing technologies that lack the function of inhibiting microbial growth, cannot meet the antibacterial requirements of food and drug safety for packaging materials, and pose a risk of surface contamination during long-term storage.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides a tear-resistant sealing gasket, comprising:

[0008] The main body of the device is composed of a support layer, a barrier layer and a heat-sealing layer stacked in sequence.

[0009] The surface of the main body of the device is sequentially stacked with a tear-resistant reinforcement layer, an easy-tear structural layer, and a surface protective layer.

[0010] The tearable structural layer comprises pre-cut weakening lines or a laser micro-perforation array, with a tear strength of 5–15 N / mm and a thickness of 10–50 μm.

[0011] Furthermore, the barrier layer is made of a high-barrier plastic film with a thickness of 10–30 μm.

[0012] Furthermore, the heat-sealing layer is made of an ionomer polymer with a melting point range of 120–140°C, a thickness of 20–60 μm, and a heat-sealing strength of 3–8 N / 15 mm.

[0013] Furthermore, the tear-resistant reinforcing layer is made of aramid fiber reinforced composite material with a thickness of 15–40 μm and a tensile strength ≥150 MPa.

[0014] Furthermore, the surface protective layer comprises a nano-silica modified polyurethane coating with a thickness of 5–20 μm.

[0015] Furthermore, an adhesive transition layer is provided between the barrier layer and the heat-sealing layer, which is composed of epoxy-modified polyolefin adhesive and has a thickness of 3–10 μm.

[0016] Furthermore, the outer surface of the surface protective layer is provided with an antibacterial functional layer with a thickness of 1–5 μm.

[0017] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0018] 1. The easy-tear structure layer is equipped with pre-cut weakening lines or a laser micro-perforation array to form a controllable initial tear path. Its tear strength is controlled at 5–15 N / mm and its thickness is 10–50 μm, ensuring stable tearing along the predetermined path when opened. The surface protective layer protects the outer structure from wear and contamination. Through the synergistic effect of the tear-resistant reinforcement layer and the easy-tear structure layer, this structure ensures the overall tear resistance of the gasket while achieving controllable opening. Combined with the barrier layer and heat-sealing layer, it forms an effective seal, meeting the packaging requirements in terms of sealing, ease of opening, and transportation safety.

[0019] 2. The outer surface of the surface protective layer is provided with an antibacterial functional layer with a thickness of 1–5 μm. This antibacterial functional layer is made by coating or depositing antibacterial substances on the surface, so that the outer surface of the tear-resistant sealing gasket has the ability to inhibit the growth of microorganisms. This thickness range achieves effective antibacterial effect without affecting the overall structural flexibility and opening performance, preventing the packaging from being contaminated by environmental microorganisms during storage or use, and improving the hygiene and safety of food and drug packaging. The antibacterial functional layer combined with the surface protective layer enhances the protective ability of the sealing gasket in complex environments. Together with the main body of the device, the tear-resistant reinforcement layer and other structures, it ensures the sealing and safety of the packaging. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a side perspective view of the present invention;

[0022] Figure 2 This is a first exploded perspective view of the present invention;

[0023] Figure 3 This is a second exploded perspective view of the present invention.

[0024] Reference numerals in the attached drawings: 1. Main body of the device; 101. Support layer; 102. Barrier layer; 103. Heat-sealing layer; 2. Tear-resistant reinforcement layer; 3. Easy-tear structural layer; 4. Surface protective layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0026] The present invention will be further described below with reference to the embodiments.

[0027] See attached document Figures 1-3 A tear-resistant sealing gasket, comprising,

[0028] The main body of the device 1 is composed of a support layer 101, a barrier layer 102 and a heat sealing layer 103 stacked in sequence.

[0029] The surface of the main body 1 of the device is sequentially provided with a tear-resistant reinforcing layer 2, an easy-tear structural layer 3, and a surface protective layer 4;

[0030] The tearable structural layer 3 contains pre-cut weakening lines or a laser micro-perforation array, with a tear strength of 5–15 N / mm and a thickness of 10–50 μm.

[0031] In a specific embodiment of this utility model, the main body 1 of the device is composed of a support layer 101, a barrier layer 102, and a heat-sealing layer 103 stacked sequentially. The support layer 101 provides overall structural strength, the barrier layer 102 is used to block oxygen and water vapor, and the heat-sealing layer 103 achieves a sealed connection with the container opening under heating conditions. A tear-resistant reinforcement layer 2, an easy-tear structural layer 3, and a surface protective layer 4 are stacked sequentially on the surface of the main body 1. The tear-resistant reinforcement layer 2 improves the resistance of the gasket to external tearing during transportation and handling, and the easy-tear structural layer 3 has a pre-cut section inside. A controllable initial tear path is formed by cutting weakening lines or laser micro-perforation arrays, with tear strength controlled at 5–15 N / mm and thickness at 10–50 μm, ensuring stable tearing along a predetermined route when opened. The surface protective layer 4 protects the outer structure from wear and contamination. This structure, through the synergistic effect of the tear-resistant reinforcement layer 2 and the easy-tear structure layer 3, achieves controllable opening while ensuring the overall tear resistance of the gasket. Combined with the barrier layer 102 and the heat-sealing layer 103, it forms an effective seal, meeting the packaging requirements in terms of sealing, ease of opening, and transportation safety.

[0032] For details, please refer to the attached document. Figures 1-3 The barrier layer 102 is made of a high-barrier plastic film with a thickness of 10–30 μm.

[0033] In this embodiment, the barrier layer 102 is made of a high-barrier plastic film with a thickness set in the range of 10–30 μm. This material has a dense molecular structure, which can effectively reduce the permeability of oxygen, water vapor and other gases, thereby reducing the impact of the external environment on the contents of the packaging. This thickness range ensures the barrier performance while taking into account the flexibility and interlayer adhesion of the material, avoiding the increased brittleness caused by excessive thickness or the defect penetration caused by excessive thinness. Together with the support layer 101 and heat-sealing layer 103 in the main body of the device 1, the barrier layer 102 can continuously play a barrier role in the sealing gasket, improving the overall quality preservation and protection capabilities of the packaging.

[0034] For details, please refer to the attached document. Figures 1-3 The heat-sealing layer 103 is made of ionomer, with a melting point range of 120–140℃, a thickness of 20–60μm, and a heat-sealing strength of 3–8N / 15mm.

[0035] In this embodiment, the heat-sealing layer 103 is made of ionomer, with a melting point range of 120–140℃, a thickness of 20–60μm, and a heat-sealing strength of 3–8N / 15mm. Under heating and pressurization, the ionomer material melts and flows, forming a tight fit with the surface of the container opening. After cooling, a firm bond is achieved. This melting point range is suitable for the heat-sealing process of common packaging materials, avoiding damage to the inner structure or contents due to excessive temperature. The thickness of 20–60μm ensures that the material has sufficient filling and continuity during the melting process, while avoiding uneven sealing due to excessive thickness or weak sealing due to excessive thinness. The heat-sealing strength is controlled within the range of 3–8N / 15mm to ensure that the seal has sufficient anti-peeling ability during transportation and storage, while not affecting normal opening. Combined with the barrier layer 102 and the support layer 101, it constitutes the complete device body 1, enabling the heat-sealing layer 103 to play an effective role in sealing performance, process adaptability, and structural stability.

[0036] For details, please refer to the attached document. Figures 1-3 The tear-resistant reinforcement layer 2 is made of aramid fiber reinforced composite material with a thickness of 15–40 μm and a tensile strength ≥150 MPa.

[0037] In this embodiment, the tear-resistant reinforcement layer 2 is made of aramid fiber reinforced composite material with a thickness of 15–40 μm and a tensile strength ≥150 MPa. Aramid fibers have high modulus and high strength characteristics, which can effectively resist the tearing propagation of the sealing gasket by external stress. This thickness range provides sufficient tensile strength while ensuring thinness, so that the tear-resistant reinforcement layer 2 is not easy to break or tear when subjected to external force. Combined with the preset weakening path in the easy-tear structure layer 3, the overall structure can be torn along the predetermined route when opened normally, while maintaining structural integrity when subjected to force in a non-predetermined direction, thus improving tear resistance. This layer works together with the main body 1 of the device and other functional layers to ensure that the sealing gasket has reliable damage resistance during transportation, storage and use.

[0038] For details, please refer to the attached document. Figures 1-3 The surface protective layer 4 contains a nano-silica modified polyurethane coating with a thickness of 5–20 μm.

[0039] In this embodiment, the surface protective layer 4 uses a nano-silica modified polyurethane coating as the material, with a thickness of 5–20 μm. The nano-silica particles are uniformly dispersed in the polyurethane matrix, which improves the hardness and wear resistance of the coating while maintaining a certain degree of flexibility. This thickness range provides effective surface protection without affecting the overall interlayer structure, enabling the surface protective layer 4 to resist external scratches, friction and environmental pollution, reduce surface damage and contaminant adhesion, and extend the service life of the sealing gasket. At the same time, the coating has good chemical stability and adhesion, and can form a reliable bond with the easy-tear structural layer 3, ensuring the integrity of the surface structure during transportation and storage. Together with the main body 1, tear-resistant reinforcing layer 2 and other structures, it maintains the overall performance of the tear-resistant sealing gasket.

[0040] For details, please refer to the attached document. Figures 1-3 An adhesive transition layer 104 is provided between the barrier layer 102 and the heat-sealing layer 103, which is composed of epoxy-modified polyolefin adhesive and has a thickness of 3–10 μm.

[0041] In this embodiment, an adhesive transition layer 104 is provided between the barrier layer 102 and the heat-sealing layer 103. The adhesive transition layer 104 is composed of an epoxy-modified polyolefin adhesive with a thickness of 3–10 μm. The epoxy-modified polyolefin adhesive has good heat resistance, chemical stability, and adhesion to different materials. It can form a strong interfacial bond between the barrier layer 102 and the heat-sealing layer 103, preventing interlayer peeling. This thickness range ensures sufficient bonding strength while avoiding a decrease in flexibility or a decrease in heat-sealing performance due to excessive adhesive layer thickness. The adhesive transition layer 104 effectively improves the interlayer bonding stability of the main body 1 of the device, ensuring that the barrier layer 102 and the heat-sealing layer 103 maintain structural integrity during processing, transportation, and use, thereby maintaining the sealing performance and structural reliability of the sealing gasket.

[0042] For details, please refer to the attached document. Figures 1-3 The outer surface of the surface protective layer 4 is provided with an antibacterial functional layer with a thickness of 1–5 μm.

[0043] In this embodiment, the outer surface of the surface protective layer 4 is provided with an antibacterial functional layer with a thickness of 1–5 μm. This antibacterial functional layer, by coating or depositing antibacterial substances on the surface, enables the outer surface of the tear-resistant sealing gasket to inhibit the growth of microorganisms. This thickness range achieves effective antibacterial effect without affecting the overall structural flexibility and opening performance, preventing surface contamination of the packaging due to contact with environmental microorganisms during storage or use, and improving the hygiene and safety of food and drug packaging. The antibacterial functional layer combined with the surface protective layer 4 enhances the protective ability of the sealing gasket in complex environments, and together with the main body 1, tear-resistant reinforcement layer 2 and other structures, ensures the sealing and safety of the packaging.

[0044] The working principle and usage process of this utility model are as follows: First, the heat-sealing layer 103 of the main body 1 of the device is aligned with the opening end of the container. The temperature is applied to 120-140℃ by a heating device, causing the heat-sealing layer 103 to melt and form a sealed connection with the container opening. After cooling, a firm seal is achieved. The adhesive transition layer 104 ensures stable interlayer bonding between the barrier layer 102 and the heat-sealing layer 103. The support layer 101 provides overall structural support. The barrier layer 102, made of high-barrier plastic film, continuously blocks oxygen and water vapor penetration. The heat-sealing layer 103, composed of ionomer polymer, maintains the heat-sealing strength within the range of 3-8 N / 15 mm. After sealing, the tear-resistant reinforcing layer 2, made of aramid fiber reinforced composite material, provides external resistance to tearing. The pre-cut weakening lines or laser micro-perforations in the easy-tear structural layer 3 further enhance the resistance. The array forms a predetermined tear path. When opened, a tensile force is applied along this path to achieve controlled tearing. The nano-silica modified polyurethane coating of the surface protective layer 4 protects the outer structure, and its antibacterial functional layer inhibits the growth of microorganisms, ensuring that the packaging maintains its airtightness, structural integrity, and hygiene safety during transportation, storage, and opening. This utility model, through the composite design of the tear-resistant reinforcement layer and the easy-tear structural layer, achieves a precise and controllable tear path when opened while ensuring the resistance to damage during transportation and storage. This solves the contradiction between the tear resistance and easy opening of traditional gaskets. At the same time, the barrier layer combined with the heat-sealing layer forms a double sealing barrier, effectively blocking the penetration of oxygen and water vapor, extending the shelf life of the contents, and further eliminating the risk of interlayer peeling, ensuring the reliability of the lifelong seal.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tear-resistant sealing gasket, comprising, characterized in that: The main body of the device (1) is composed of a support layer (101), a barrier layer (102) and a heat-sealing layer (103) stacked in sequence; The surface of the main body (1) of the device is provided with a tear-resistant reinforcing layer (2), an easy-tear structural layer (3), and a surface protective layer (4) stacked in sequence; The tearable structural layer (3) includes pre-cut weakening lines or laser micro-perforation arrays, with a tear strength of 5–15 N / mm and a thickness of 10–50 μm.

2. The tear-resistant sealing gasket according to claim 1, characterized in that, The barrier layer (102) is made of a high-barrier plastic film with a thickness of 10–30 μm.

3. The tear-resistant sealing gasket according to claim 2, characterized in that, The heat-sealing layer (103) is made of an ionomer, with a melting point range of 120–140℃, a thickness of 20–60μm, and a heat-sealing strength of 3–8N / 15mm.

4. A tear-resistant sealing gasket according to claim 3, characterized in that, The tear-resistant reinforcing layer (2) is made of aramid fiber reinforced composite material with a thickness of 15–40 μm and a tensile strength ≥150 MPa.

5. A tear-resistant sealing gasket according to claim 4, characterized in that, The surface protective layer (4) comprises a nano-silica modified polyurethane coating with a thickness of 5–20 μm.

6. A tear-resistant sealing gasket according to claim 5, characterized in that, An adhesive transition layer (104) is provided between the barrier layer (102) and the heat-sealing layer (103), which is composed of epoxy-modified polyolefin adhesive and has a thickness of 3–10 μm.

7. A tear-resistant sealing gasket according to claim 6, characterized in that, The outer surface of the surface protective layer (4) is provided with an antibacterial functional layer with a thickness of 1–5 μm.

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