Valve port structure of material packaging bag
Through the design of dislocation overlap of N+2 layer material layer, the problem of unreliable heat sealing at the valve port of the material packaging bag is solved, and the stability and reliability of the heat seal are achieved, and material leakage is avoided.
Patent Information
- Application Number
- CN202421515897.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-29
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-06-29
AI Technical Summary
During the heat sealing process, the heat sealing of the existing material packaging bag valve port is not reliable due to thickness differences, which is prone to material leakage.
The N+2 layer material layer is misaligned and overlapped to form the N+3 layer overlap area and the junction edge area to ensure thickness uniformity and reduce the thickness difference of the heat seal position to within 0.08mm.
While ensuring the stiffness of the valve port, the stability and reliability of the heat seal are improved and material leakage is avoided.
Smart Images
Figure CN223073048U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of packaging bag design, and particularly relates to a valve structure of a material packaging bag. Background Art
[0002] When thermally sealing the valve of a material packaging bag at a constant temperature and by ultrasonic wave, if it is a single-layer valve, there will be a thickness difference between two layers and three layers at the overlapping part ( Figure 2 ). Taking the valve at 0.24 mm as the standard, then the overlapping part will be 0.72 mm ( Figure 2 ). In this way, the thermally sealed part at the three-layer (thick) position of the overlapping part is not firmly sealed, while the two-layer (thin) position is prone to over-thermal sealing, breakage, and material leakage. The reason is that the thickness difference between the overlapping position and the non-overlapping position of the valve is too large, reaching 0.24 mm. Content of the Utility Model
[0003] The utility model aims to overcome the deficiencies of the prior art and provides a valve structure of a material packaging bag.
[0004] In order to achieve the above purpose, the technical solution provided by the utility model is as follows:
[0005] The valve structure of the material packaging bag is characterized in that the valve comprises at least N + 2 material layers (1), where N ≥ 1 and N is an integer. The head and tail of each material layer (1) overlap to form the valve, and the overlapping area of the head and tail of the material layer (1) is the thermally sealed position; when N = 1, the innermost material layer (1) of the valve is the Nth layer, the N + 1th layer is on the Nth layer, and the N + 2th layer is on the N + 1th layer; the head end of the Nth layer overlaps with the tail end of the N + 2th layer to form a first overlapping area (2); the head end of the N + 1th layer overlaps with the N + 2th layer to form a second overlapping area (3); the head end of the N + 2th layer overlaps with the N + 2th layer to form a third overlapping area (4); the junction between the second overlapping area (3) and the first overlapping area (2) is the first junction edge area (5); the junction between the third overlapping area (4) and the second overlapping area (3) is the second junction edge area (6); the number of material layers in both the first junction edge area (5) and the second junction edge area (6) is N + 2 layers; the tail end of the N + 1th layer extends to the edge position of the first junction edge area (5); the tail end of the Nth layer extends to the edge position of the second junction edge area (6).
[0006] Preferably, the number of material layers in the first overlapping area (2), the second overlapping area (3), and the third overlapping area (4) is all N + 3 layers.
[0007] Preferably, the first overlapping region (2), the second overlapping region (3), the third overlapping region (4), the first junction edge region (5) and the second junction edge region (6) form the heat-sealing position of the valve port.
[0008] Preferably, when N = 2, the innermost material layer (1) of the valve port is the (N - 1)th layer, the Nth layer is on the (N - 1)th layer, the (N + 1)th layer is on the Nth layer, and the (N + 2)th layer is on the (N + 1)th layer; the head end of the (N - 1)th layer overlaps with the tail end of the (N + 2)th layer to form the first overlapping region (2); when N > 2, by analogy, a total of (N + 2) overlapping regions and (N + 1) junction edge regions are formed.
[0009] Preferably, the total thickness of the (N + 2) material layers (1) is 0.24 mm.
[0010] The following further explains the present invention:
[0011] In order to solve the problems of the prior art, the present invention is developed and designed with three layers of materials stacked together and in a staggered overlapping manner. Under the requirement of a certain total thickness of the valve port (such as a standard of 0.24 mm), the thickness of each material layer is 0.08 mm, the thickness of the overlapping position for heat sealing is 0.56 mm, and the thickness of the thinnest non-overlapping position is 0.48 mm. The difference in thickness is only 0.08 mm, which is much lower than 0.24 mm in the prior art. While ensuring the stiffness of the valve port material, the problem of unreliable heat sealing is perfectly solved.
[0012] In addition, a valve port structure with more than three layers can also be designed, using a stepped overlapping method. The more layers there are, the smaller the difference in thickness at the overlapping position. For example, for four layers, the difference in thickness is only 0.06 mm, and for six layers, the difference in thickness is only 0.04 mm. The smaller the difference in thickness, the more stable and reliable the heat sealing. However, considering the factors of cost and processing difficulty, the three-layer design is the optimal solution to meet the sealing requirements. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural diagram of the present invention;
[0014] Figure 2 is a schematic structural diagram of the prior art.
[0015] In the figure: 1, material layer; 2, first overlapping region; 3, second overlapping region; 4, third overlapping region; 5, first junction edge region; 6, second junction edge region. DETAILED DESCRIPTION OF THE INVENTION Embodiment
[0016] See Figure 1, the valve opening structure of the material packaging bag includes N + 2 layers of material layer 1, where N = 1. The head and tail of each layer of material layer 1 overlap to form a valve opening, and the overlapping area of the head and tail of material layer 1 is the heat-sealing position; the innermost material layer 1 of the valve opening is the Nth layer, the N + 1th layer is above the Nth layer, and the N + 2th layer is above the N + 1th layer; the head end of the Nth layer overlaps with the tail end of the N + 2th layer to form the first overlapping area 2; the head end of the N + 1th layer overlaps with the N + 2th layer to form the second overlapping area 3; the head end of the N + 2th layer overlaps with the N + 2th layer to form the third overlapping area 4; the intersection of the second overlapping area 3 and the first overlapping area 2 is the first junction edge area 5; the intersection of the third overlapping area 4 and the second overlapping area 3 is the second junction edge area 6; the number of material layers in both the first junction edge area 5 and the second junction edge area 6 is N + 2 layers; the tail end of the N + 1th layer extends to the edge position of the first junction edge area 5; the tail end of the Nth layer extends to the edge position of the second junction edge area 6.
[0017] Among them, the number of material layers in the first overlapping area 2, the second overlapping area 3, and the third overlapping area 4 is all N + 3 layers. The first overlapping area 2, the second overlapping area 3, the third overlapping area 4, the first junction edge area 5, and the second junction edge area 6 constitute the heat-sealing position of the valve opening. The total thickness of the N + 2 layers of material layer 1 is 0.24 mm. Embodiment
[0018] The valve opening structure of the material packaging bag is characterized in that the valve opening includes at least N + 2 layers of material layer 1, where N ≥ 1 and N is an integer. The head and tail of each layer of material layer 1 overlap to form a valve opening, and the overlapping area of the head and tail of material layer 1 is the heat-sealing position; when N = 2, the innermost material layer (1) of the valve opening is the N - 1th layer, the Nth layer is above the N - 1th layer, the N + 1th layer is above the Nth layer, and the N + 2th layer is above the N + 1th layer; the head end of the N - 1th layer overlaps with the tail end of the N + 2th layer to form the first overlapping area; the head end of the Nth layer overlaps with the N + 2th layer to form the second overlapping area; the head end of the N + 1th layer overlaps with the N + 2th layer to form the third overlapping area; the head end of the N + 2th layer overlaps with the N + 2th layer to form the fourth overlapping area; the intersection of the second overlapping area and the first overlapping area is the first junction edge area; the intersection of the third overlapping area and the second overlapping area is the second junction edge area; the intersection of the fourth overlapping area and the third overlapping area is the third junction edge area; the number of material layers in the first junction edge area, the second junction edge area, and the third junction edge area is all N + 2 layers; the tail end of the N + 1th layer extends to the edge position of the first junction edge area; the tail end of the Nth layer extends to the edge position of the second junction edge area; the tail end of the N - 1th layer extends to the edge position of the third junction edge area.
[0019] Among them, the number of material layers in the first overlapping region, the second overlapping region, the third overlapping region, and the fourth overlapping region is all N + 3 layers. The first overlapping region, the second overlapping region, the third overlapping region, the fourth overlapping region, the first junction edge region, the second junction edge region, and the third junction edge region form the heat-sealing position of the valve port. The total thickness of the N + 2 material layers (1) is 0.24 mm.
[0020] When N > 2, by analogy, a total of N + 2 overlapping regions and N + 1 junction edge regions are formed.
Claims
1. A valve opening structure of a material packaging bag, characterized in that, The valve orifice comprises at least N + 2 material layers (1), where N≥1 and N is an integer. The head and tail of each material layer (1) are overlapped to form the valve orifice, and the overlapping area of the head and tail of the material layer (1) is the heat-sealing position; when N = 1, the innermost material layer (1) of the valve orifice is the Nth layer, the N + 1th layer is on the Nth layer, and the N + 2th layer is on the N + 1th layer; the head end of the Nth layer overlaps with the tail end of the N + 2th layer to form the first overlapping area (2); the head end of the N + 1th layer overlaps with the N + 2th layer to form the second overlapping area (3); the head end of the N + 2th layer overlaps with the N + 2th layer to form the third overlapping area (4); the junction between the second overlapping area (3) and the first overlapping area (2) is the first junction edge area (5); the junction between the third overlapping area (4) and the second overlapping area (3) is the second junction edge area (6); the number of material layers in both the first junction edge area (5) and the second junction edge area (6) is N + 2 layers; the tail end of the N + 1th layer extends to the edge position of the first junction edge area (5); the tail end of the Nth layer extends to the edge position of the second junction edge area (6).
2. The valve opening structure of the material packaging bag according to claim 1, characterized in that The number of material layers in the first overlapping area (2), the second overlapping area (3), and the third overlapping area (4) is all N + 3 layers.
3. The valve opening structure of the material packaging bag according to claim 2, characterized in that, The first overlapping area (2), the second overlapping area (3), the third overlapping area (4), the first junction edge area (5), and the second junction edge area (6) constitute the heat-sealing position of the valve orifice.
4. The valve opening structure of the material packaging bag according to any one of claims 1 to 3, characterized in that When N = 2, the innermost material layer (1) of the valve orifice is the N - 1th layer, the Nth layer is on the N - 1th layer, the N + 1th layer is on the Nth layer, and the N + 2th layer is on the N + 1th layer; the head end of the N - 1th layer overlaps with the tail end of the N + 2th layer to form the first overlapping area (2); when N>2, and so on, a total of N + 2 overlapping areas and N + 1 junction edge areas are formed.
5. The valve opening structure of the material packaging bag according to claim 4, characterized in that, The total thickness of the N + 2 material layers (1) is 0.24 mm.