Anti-falling middle sealing bag
By misaligning the edges of the heat-sealed area during the edge-folding process of the center-sealed bag, the problem of strength reduction during the production process is solved, improving the drop resistance and sealing performance, and ensuring product safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-04-03
AI Technical Summary
During the production process, the center seal edge of existing center-sealed bags is easily crushed and damaged, resulting in reduced strength and thinner heat seal thickness. This makes the bags prone to breakage when dropped, posing a safety hazard.
Design a shock-resistant center-sealed bag. After the center-sealed edge is folded to form a crease, it is misaligned with the edge of the heat-sealed area to avoid further compression. The width of the heat-sealed area of the center-sealed edge is smaller than the width of the folded edge, and there is a 1mm-2mm gap between the crease and the inner edge to increase the resistance to drop damage.
It improves the shock resistance of the center-sealed bag, enhances the packaging sealing performance, and improves product reliability.
Smart Images
Figure CN224076134U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of packaging bags, and in particular to a shock-resistant, center-sealed bag. Background Technology
[0002] In existing center-seal bags, the production process involves folding the roll film using a pre-folding plate, heat-sealing it to form the center seal, and then further heat-sealing the top to create a heat-sealed T-shaped opening. Downstream manufacturers then fill the contents and heat-seal the bottom.
[0003] However, during bag making, the pre-folded plate needs to be pressed tightly against the inside of the center seal edge, and then the center seal edge 1' is folded to form a crease 12' at the inner edge 11' of the center seal edge (as shown in the image). Figure 1 As shown in the figure, the middle seal edge is pressed tightly against the bag body 2' to facilitate subsequent top heat sealing. During this process, the material is easily squeezed and damaged, becoming brittle and affecting its strength. Moreover, the thickness of the two layers of film at the middle seal edge will also become thinner and deformed after heat sealing. When the product is dropped, the bag often breaks at the inner edge of the middle seal edge, posing a potential hazard. Utility Model Content
[0004] The purpose of this utility model is to provide a shock-resistant sealed bag with the advantages of being shock-resistant and breakage-proof.
[0005] To achieve the above objectives, the solution of this utility model is:
[0006] A shock-resistant center-sealed bag includes a bag body with a longitudinal center-sealed edge in the middle of the back of the bag body; the center-sealed edge is folded to form a crease and then abuts against the back of the bag body, and the crease between the center-sealed edge and the bag body is offset inward relative to the inner edge of the heat-sealed area of the center-sealed edge.
[0007] Furthermore, the width of the heat-sealed area of the middle edge is smaller than the width of the folded middle edge.
[0008] Furthermore, the crease and the edge of the heat-sealed area of the middle edge are spaced apart from each other, with a distance between 1mm and 2mm.
[0009] Furthermore, the width of the heat-sealed area at the middle edge is 5mm-15mm, preferably 10mm.
[0010] Furthermore, the top and / or bottom of the bag are heat-sealed to form a transverse sealing edge.
[0011] Furthermore, the bag body has accordion sections on both the left and right sides.
[0012] By adopting the above technical solution, during production, when folding the center seal edge, the crease is moved inward to avoid the edge of the heat-sealed area, and it is misaligned with the heat-sealed area without overlapping. This avoids further folding and squeezing of the weak edge of the heat-sealed area, preventing further decrease in strength. Consequently, the drop resistance of the center seal edge is improved, thereby enhancing the packaging sealing performance of the center seal bag and improving product reliability. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of a traditional sealed bag.
[0014] Figure 2 This is a schematic diagram of an embodiment of the present utility model;
[0015] Figure 3 for Figure 2 Sectional view at point AA.
[0016] Labeling explanation: 1. Bag body, 2. Center seal, 21. Crease, 22. Heat seal area, 23. Inner edge, 3. Horizontal seal, 4. Accordion section. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0018] like Figure 2 and Figure 3 As shown, an anti-drop sealed bag according to this embodiment includes a bag body 1, and a longitudinal center seal edge 2 in the middle of the back of the bag body 1; the center seal edge 2 is folded to form a crease 21 and then abuts against the back of the bag body 1, and the crease 21 between the center seal edge 2 and the bag body 1 is offset inward relative to the inner edge 23 of the heat-sealed area 22 of the center seal edge 2.
[0019] Therefore, during production, when folding the center seal edge 2, the crease 21 is moved inward to avoid the inner edge 23 of the heat-sealed area 22, and is misaligned with the heat-sealed area 22 without overlapping. This avoids further folding and squeezing of the weak inner edge 23 of the heat-sealed area 22, preventing further decrease in strength at that point. Consequently, the drop resistance of the center seal edge 2 is improved, thereby enhancing the packaging sealing performance of the center seal bag and improving product reliability.
[0020] Specifically, the width H1 of the heat-sealed area 22 of the middle sealing edge 2 is smaller than the width H2 of the folded middle sealing edge 2. During production, the middle sealing edge 2 with a larger width can be folded first, and then the outer part of the area can be heat-sealed.
[0021] The crease 21 and the inner edge 23 of the heat-sealed area 22 of the middle edge 2 are spaced apart, with a distance between them ranging from 1mm to 2mm. In this embodiment, the distance is taken as 1mm, and the width of the heat-sealed area 22 of the middle edge 2 can be 5mm-15mm, preferably 10mm.
[0022] After the center sealing edge 2 is folded and heat-sealed, the top and / or bottom of the bag body 1 can be heat-sealed to form a transverse sealing edge 3.
[0023] Meanwhile, the bag body 1 may have accordion sections 4 on both the left and right sides to provide more storage space. Of course, the accordion sections 4 may not be provided.
[0024] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes and modifications without departing from the principle of this utility model should still fall within the protection scope of this utility model.
[0025] In the description of the embodiments of this application, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships commonly used when the product is in use, or the orientations or positional relationships commonly understood by those skilled in the art. These are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise explicitly specified.
Claims
1. A fall-resistant zippered bag comprising a bag body having a longitudinal zipper edge in the middle of the back of the bag body; characterized in that: The middle sealing edge is folded to form a crease, and the crease is attached to the back of the bag body, and the crease between the middle sealing edge and the bag body is offset inward relative to the inner edge of the heat sealing area of the middle sealing edge.
2. A spill-resistant pouch according to claim 1, wherein: The width of the heat sealing area of the middle sealing edge is smaller than the width of the middle sealing edge after being folded.
3. A spill-resistant pouch according to claim 1, wherein: The crease and the inner edge of the heat sealing area of the middle sealing edge are spaced apart from each other, and the distance therebetween is between 1mm and 2mm.
4. A spill-resistant pouch according to claim 1, wherein: The width of the heat sealing area of the middle sealing edge is between 5mm and 15mm.
5. A spill-resistant pouch according to claim 4, wherein: The width of the heat sealing area of the middle sealing edge is 10mm.
6. A spill-resistant pouch according to claim 1, wherein: The top and / or lower part of the bag body is heat sealed to form a transverse sealing edge.
7. A spill-resistant pouch according to claim 1, wherein: The bag body has an organ part on each of the left and right sides.