Impact resistant packaging bag

Abstract

This utility model discloses an impact-resistant packaging bag, relating to the field of packaging bags. The key technical points are: it includes a bag body, from the outside to the inside of which are sequentially provided a first NY film layer and a second composite film layer. The first NY film layer is a biaxially oriented nylon film, and the second composite film layer is a co-extruded film of PE and NY. The effect is that the complementary properties of the two films can disperse impact loads, improving the overall structural strength of the bag body and reducing localized damage to corners and sealing edges. When subjected to strong impacts such as drops or collisions, the first sealing edge near the inside is subjected to force first, undergoing controlled separation under the impact energy to dissipate some energy. The remaining energy is further attenuated through the buffer cavity between the two sealing edges before being transferred to the second sealing edge on the outside, with a heat-sealing strength greater than 40N / 15mm. The second sealing edge, with its high strength characteristics, blocks the remaining impact, preventing the bag body from rupturing or the contents from leaking.

Description

Technical Field

[0001] This utility model relates to the field of packaging bags, and more specifically, it relates to an impact-resistant packaging bag. Background Technology

[0002] In the packaging and transportation of liquids, pastes, and other fluids, the impact resistance of packaging bags directly determines the safety of the contents.

[0003] In existing technologies, the structural design of traditional packaging bags has obvious defects: First, the film layer mostly uses a single material or a simple composite structure, such as pure PE film or ordinary NY / PE composite film. Although these materials have a certain degree of flexibility, their puncture resistance and tear resistance are insufficient. When subjected to strong impacts such as drops and collisions, the bag is prone to local damage, especially at the corners and sealed edges. Second, the heat-sealing edge generally adopts a single-layer sealing structure, with uniform heat-sealing strength mostly controlled between 20-30N / 15mm. This design presents a dilemma—if the heat-sealing strength is too low, the seal is prone to cracking directly upon impact, leading to leakage of the contents; if the heat-sealing strength is too high, the impact energy will be directly transferred to the bag film, causing overall rupture, and failing to effectively buffer the impact energy.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes an impact-resistant packaging bag. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an impact-resistant packaging bag.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an impact-resistant packaging bag, comprising a bag body, wherein the bag body is provided with a first NY film layer and a second composite film layer from the outside to the inside, wherein the first NY film layer is a biaxially oriented nylon film, and the second composite film layer is a co-extruded film of PE and NY.

[0007] The bag body has a first sealing edge and a second sealing edge distributed circumferentially at the heat-sealed edge. The first sealing edge is located near the inner side of the bag body and its heat-sealing strength is 8-15N / 15mm. The second sealing edge is located on the outer side and its heat-sealing strength is greater than 40N / 15mm. A buffer cavity is formed between the first sealing edge and the second sealing edge.

[0008] Preferably, the buffer cavity is provided with elastic buffer ribs, which are made of EVA material and are distributed in a wave shape.

[0009] Preferably, the thickness ratio of the PE layer to the NY layer in the second composite film layer is 3:1-5:1.

[0010] Preferably, the top of the bag is provided with a handle.

[0011] Preferably, the handle is a detachable carrying strap located at the top of the bag, and the inner side of the carrying strap has an anti-slip texture.

[0012] Preferably, the width of the first edge sealing is 3-5mm, the width of the second edge sealing is 8-10mm, and the distance between the two edge sealing is 5-8mm.

[0013] Preferably, the inner side of the second composite film layer is provided with an anti-slip texture, the texture depth is 0.1-0.2mm, and it is distributed in a diamond grid pattern.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model utilizes the complementary properties of two thin films to disperse impact loads, thereby improving the overall structural strength of the bag and reducing local damage to corners and sealing edges. When subjected to strong impacts such as drops or collisions, the first sealing edge closest to the inside is subjected to force first and undergoes controllable separation under the action of impact energy to consume some energy. The remaining energy is further attenuated through the buffer cavity between the two sealing edges and then transferred to the second sealing edge on the outside with a heat seal strength greater than 40N / 15mm. The second sealing edge, with its high strength characteristics, blocks the remaining impact, preventing the bag from breaking or the contents from leaking. This solves the dilemma of traditional single-layer sealing edges having low strength and being prone to cracking, and excessive strength causing energy to directly damage the bag, thus achieving the step-by-step absorption and blocking of impact energy.

[0016] 2. In this utility model, the thickness ratio of the PE layer to the NY layer in the second composite film layer is 3:1-5:1, which can achieve precise matching of material properties and functional complementarity. The PE layer has excellent flexibility and heat-sealing properties. A higher proportion can ensure good adhesion between the film and the packaging, while improving the sealing performance and low-temperature resistance of the heat-sealed edge. The NY layer provides high strength and puncture resistance. An appropriate proportion can increase the tear strength of the film to over 80N while controlling costs, avoiding the problem of insufficient strength caused by an excessively thick PE layer.

[0017] 3. In this utility model, the space of the buffer cavity combined with the elastic support of the buffer rib can prevent the two sealing edges from directly contacting each other and causing rigid collisions during impact. At the same time, the wavy distribution makes the contact area between the buffer rib and the sealing edge more uniform, which can disperse local stress and prevent the sealing edge from tearing due to concentrated force. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This utility model Figure 1 Another perspective on the specific structure;

[0021] Figure 3 This is a schematic diagram of the structural layers of the bag body in this utility model.

[0022] In the diagram: 1. Bag body; 101. First NY film layer; 102. Second composite film layer; 2. Handle strap; 3. Elastic cushioning rib. Detailed Implementation

[0023] like Figure 1-3 As shown, this utility model provides an impact-resistant packaging bag, including a bag body 1. The bag body 1 is provided with a first NY film layer 101 and a second composite film layer 102 from the outside to the inside. The first NY film layer 101 is a biaxially oriented nylon film, and the second composite film layer 102 is a co-extruded film of PE and NY. The heat-sealed edge of the bag body 1 is provided with a first sealing edge and a second sealing edge distributed circumferentially. The first sealing edge is located near the inner side of the bag body 1, and its heat sealing strength is 8-15N / 15mm. The second sealing edge is located on the outer side, and its heat sealing strength is greater than 40N / 15mm. A buffer cavity is formed between the first sealing edge and the second sealing edge.

[0024] The above-mentioned optimized film composite structure and double-sealed edge buffer design achieve graded buffering and isolation of impact energy. The outer first NY film layer 101 is made of biaxially oriented nylon film, which utilizes its high strength and puncture resistance to resist external impacts. The inner second composite film layer 102 is a PE and NY co-extruded film, which combines the flexibility of PE and the tear resistance of NY to form synergistic protection. The complementary properties of the two films can disperse impact loads, improve the overall structural strength of the bag body 1, and reduce local damage to the corners and sealing edges. When subjected to strong impacts such as drops and collisions, the inner side... The first sealing edge (heat seal strength 8-15N / 15mm) is subjected to force first. Under the action of impact energy, it undergoes controlled separation to consume some energy. The remaining energy is further attenuated through the buffer cavity between the two sealing edges and then transferred to the second sealing edge on the outside with a heat seal strength greater than 40N / 15mm. The second sealing edge, with its high strength characteristics, blocks the remaining impact and prevents the bag body 1 from rupturing or the contents from leaking. This solves the dilemma of traditional single-layer sealing edge having low strength and being prone to cracking, and excessive strength causing energy to directly damage the bag body 1. It achieves the step-by-step absorption and blocking of impact energy.

[0025] In the second composite film layer 102, the thickness ratio of the PE layer to the NY layer is 3:1-5:1, achieving precise matching and functional complementarity of material properties: the PE layer has excellent flexibility and heat-sealing properties, and a higher proportion ensures good adhesion between the film and the packaging, while improving the sealing performance and low-temperature resistance of the heat-sealed edges. The NY layer provides high strength and puncture resistance, and an appropriate proportion (1 / 3-1 / 5) can increase the tear strength of the film to over 80N while controlling costs, avoiding insufficient strength caused by an excessively thick PE layer. The width of the first sealing edge is 3-5mm, the width of the second sealing edge is 8-10mm, and the distance between the two sealing edges is 5-8mm, forming a gradient impact protection system: the narrow first sealing edge (3-5mm) can quickly achieve controllable separation upon impact, and its smaller width reduces the energy required for separation, ensuring that the buffer mechanism can be activated at the initial stage of impact; the wide second sealing edge (8-10mm) increases the strength of the NY layer by increasing the thickness of the NY layer. The heat-sealed area enhances structural strength, forming a reliable final barrier with a heat-sealing strength greater than 40N / 15mm, preventing breakage due to excessive local stress caused by insufficient width. The 5-8mm spacing provides sufficient deformation space for the separation of the first seal edge and forms an air buffer layer through the gap, further attenuating impact energy. It also prevents the two seal edges from interfering with each other due to being too close (such as the second seal edge being stressed when the first seal edge separates). The inner side (the side in contact with the packaged item) of the second composite film layer 102 has an anti-slip texture with a texture depth of 0.1-0.2mm, distributed in a diamond grid. The anti-slip texture reduces the slippage amplitude of liquids, pastes, and other contents when they shake inside the bag by more than 30%, reducing the additional load on the seal edge due to inertial impact. The geometric design of the diamond grid can form a uniformly distributed "grip point", which has a microscopic anchoring effect on viscous contents, avoiding uneven stress on the bag body 1 caused by local aggregation due to bumps during transportation.

[0026] Furthermore, the buffer cavity is equipped with elastic buffer ribs 3, which are made of EVA material and distributed in a wave shape. This forms a multi-dimensional impact energy buffering mechanism. EVA material itself has excellent elastic recovery (deformation rate can reach more than 60%). The wave-shaped structure can efficiently absorb impact kinetic energy through its own compression and unfolding deformation process, further attenuating the remaining energy transmitted after the first sealing edge is separated by more than 50%. The space of the buffer cavity, combined with the elastic support of the buffer ribs, can prevent the two sealing edges from directly contacting each other during impact and causing rigid collision. At the same time, the wave-shaped distribution makes the contact area between the buffer ribs and the sealing edge more uniform, which can disperse local stress and prevent the sealing edge from tearing due to concentrated stress.

[0027] Furthermore, this utility model also has a handle at the top of the bag body 1, and the hand-holding part is a detachable carrying strap 2 set at the top of the bag body 1. The inner side of the carrying strap 2 is provided with anti-slip texture. The anti-slip texture on the inner side of the carrying strap 2 can increase the friction between the hand and the strap body. Even when the hand is wet or the bag body 1 is heavy, it can effectively prevent slipping and reduce the risk of the bag body 1 falling accidentally during handling. The detachable structure allows the carrying strap 2 to be flexibly removed when not in use, improving the flexibility of use.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An impact-resistant packaging bag, comprising a bag body (1), characterized in that: The bag body (1) is provided with a first NY film layer (101) and a second composite film layer (102) from the outside to the inside. The first NY film layer (101) is a biaxially oriented nylon film, and the second composite film layer (102) is a co-extruded film of PE and NY. The heat-sealed edge of the bag body (1) is provided with a first sealing edge and a second sealing edge distributed circumferentially. The first sealing edge is located near the inner side of the bag body (1) and its heat sealing strength is 8-15N / 15mm. The second sealing edge is located on the outer side and its heat sealing strength is greater than 40N / 15mm. A buffer cavity is formed between the first sealing edge and the second sealing edge.

2. The impact-resistant packaging bag according to claim 1, characterized in that: The buffer cavity is provided with elastic buffer ribs (3), and the elastic buffer ribs (3) are made of EVA material and are distributed in a wave shape.

3. The impact-resistant packaging bag according to claim 1, characterized in that: The thickness ratio of the PE layer to the NY layer in the second composite film layer (102) is 3:1-5:

1.

4. The impact-resistant packaging bag according to claim 1, characterized in that: The bag (1) has a handle at the top.

5. The impact-resistant packaging bag according to claim 4, characterized in that: The hand-held part is a detachable carrying strap (2) set on the top of the bag body (1), and the inside of the carrying strap (2) is provided with anti-slip texture.

6. The impact-resistant packaging bag according to claim 1, characterized in that: The width of the first edge banding is 3-5mm, the width of the second edge banding is 8-10mm, and the distance between the two edge bandings is 5-8mm.

7. The impact-resistant packaging bag according to claim 1, characterized in that: The inner side of the second composite film layer (102) is provided with anti-slip texture, the texture depth is 0.1-0.2mm, and it is distributed in a diamond grid pattern.

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