Vacuum packaging bag with built-in convex lines

Abstract

The vacuum packaging bag comprises a first sealing film, a second sealing film and a sealed vacuum cavity arranged between the first sealing film and the second sealing film, the bottom and the two sides of the sealed vacuum cavity are fixedly connected through the first sealing film and the second sealing film in a sealed mode, and an opening communicated with the outside is formed in the upper portion of the sealed vacuum cavity. An opening is formed in the first sealing film or the second sealing film, an elastic clamping zipper is arranged at the opening, a vacuum one-way valve is arranged on the first sealing film or the second sealing film, a composite ventilation structure used for sealing the vacuum cavity during vacuumizing is arranged on the inner surface of the first sealing film or the second sealing film, and the composite ventilation structure comprises a plurality of convex pattern units which are evenly distributed in an array mode.

Description

Technical Field

[0001] This utility model relates to the field of packaging bags, specifically to a vacuum packaging bag with built-in embossed texture. Background Technology

[0002] Vacuum preservation is a technology that extends the shelf life of food by reducing its contact with air. The principle involves placing the food in a vacuum-sealed packaging structure, then using a vacuum pump to remove the air from the packaging, creating a vacuum environment for the food.

[0003] Currently, most vacuum packaging structures on the market are equipped with a vacuum one-way valve. For example, Chinese utility model patent CN202670420U discloses a vacuum packaging bag with a dust cover and valve, including a plastic bag body with a storage opening at the top and welded seals on the other sides. A sealing slip chain is provided at the storage opening. A vacuum one-way valve is provided on the plastic bag body. The vacuum one-way valve includes a dust cover, a soft valve plate, and a valve seat. The valve seat includes a valve seat body, a cylinder, a snap-fit ​​groove, a snap-fit ​​opening, and an air inlet. The snap-fit ​​of the dust cover is snapped into the snap-fit ​​groove of the valve seat, and the dust cover is rotatably connected to the valve seat. There are several support plates at the bottom of the valve seat. The outer end of the support plate is fixedly connected to the valve seat body, and the inner end of the support plate is fixedly connected to a small ring. The soft valve plate is located between the dust cover's dustproof mesh and the bottom of the cylinder. Although the vacuum packaging bags mentioned above can be connected to a vacuum pump using a vacuum check valve, they cannot solve the problem of localized air bubbles caused by excessive adhesion of the sealing film during actual use. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a vacuum packaging bag with built-in embossed texture:

[0005] A vacuum packaging bag with built-in embossed texture includes a first sealing film, a second sealing film, and a sealed vacuum cavity disposed between the two. The bottom and sides of the sealed vacuum cavity are sealed and fixedly connected by the first and second sealing films. The upper part of the sealed vacuum cavity has an opening communicating with the outside. The opening is provided with an elastic locking zipper. A vacuum one-way valve is provided on the first sealing film. The inner surface of the second sealing film is provided with a composite ventilation structure for evacuating the sealed vacuum cavity. The composite ventilation structure includes multiple uniformly arrayed embossed units.

[0006] Preferably, the height of the embossed units decreases from 0.5 mm near the vacuum check valve to 0.2 mm towards the edge, and the spacing between adjacent embossed units is 8-12 mm. The structure of this application is a gradient-decreasing array distribution. In actual vacuuming processes, because the embossed height at the edges is lower, it is easier for the two sealing films at the edges to adhere.

[0007] Preferably, the raised texture unit is a hemispherical elastic protrusion with a compression resilience of ≥85%, maintaining a 0.1mm gap when compressed by 30%, and an adjacent stripe spacing of 8-12mm. The hemispherical elastic protrusion has a superior elastic recovery effect.

[0008] Preferably, the raised texture unit is an L-shaped fish scale pattern, which is composed of two connected diagonal stripes with an included angle of 110°-150° and a spacing of 8-12mm between adjacent stripes.

[0009] Preferably, the raised stripe unit is a wedge-shaped raised stripe, the cross-section of the wedge-shaped raised stripe is a right triangle, and the inclined surface of the wedge-shaped raised stripe faces the vacuum one-way valve with an inclination angle of 15°-30°.

[0010] Preferably, it also includes a gradient microchannel structure, which is composed of radial or fishbone-shaped raised stripes extending outward from the vacuum one-way valve position. The height of the gradient microchannel structure is adapted to the height of the raised stripe unit, and the arrayed raised stripe unit is disposed between the raised stripes of the gradient microchannel structure.

[0011] Preferably, the composite ventilation structure further includes a fractal topology structure nested within a gradient microchannel structure. The fractal topology structure includes interconnected main channels and secondary channels. The main channel has a width of 0.8 mm, and the secondary channel has a width of 0.5 mm. The main channel and secondary channels are provided with multiple air outlets arranged along the channels, and the air outlets are staggered.

[0012] Beneficial effects: The principle behind the ventilation structure is that the embossed units create a ventilation gap between the first and second sealing membranes under normal conditions. During the initial extraction of air from the sealed vacuum chamber, the ventilation gap formed by the embossed units maintains airflow within the chamber, preventing localized air bubbles caused by partial sealing closure. This application only sets the embossed structure on the first or second sealing membrane to avoid the situation where the embossed structures on both sealing membranes abut against each other, resulting in an excessively large ventilation gap. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Example 1.

[0014] Figure 2 This is a partial internal view schematic diagram of Example 1.

[0015] Figure 3 This is a partial internal perspective view of Example 1.

[0016] Figure 4 This is a cross-sectional schematic diagram of Example 1.

[0017] Figure 5 This is a partial cross-sectional schematic diagram of Example 1.

[0018] Figure 6 This is a partial internal view schematic diagram of Example 2.

[0019] Figure 7 This is a partial internal view schematic diagram of Example 4.

[0020] Reference numerals: 1. First sealing membrane; 2. Second sealing membrane; 3. Sealed vacuum chamber; 4. Elastic locking zipper; 5. Vacuum one-way valve; 6. Hemispherical elastic protrusion; 7. L-shaped fish scale pattern; 8. Gradient microchannel structure; 9. Main channel; 10. Secondary channel; 11. Air outlet. Detailed Implementation

[0021] The following is in conjunction with the appendix Figures 1-7 The present invention will be further described with reference to Examples 1-4.

[0022] Example 1: As Figures 1-5 As shown, a vacuum packaging bag with built-in embossed texture includes a first sealing film 1, a second sealing film 2, and a sealed vacuum cavity 3 disposed between the two. The bottom and sides of the sealed vacuum cavity 3 are sealed and fixedly connected by the first sealing film 1 and the second sealing film 2. The upper part of the sealed vacuum cavity 3 has an opening communicating with the outside, and an elastic locking zipper 4 is provided at the opening. The elastic locking zipper 4 described in this application is a commonly used press-lock sealing zipper structure in existing packaging and can be directly purchased from the market. A vacuum one-way valve 5 is provided on the first sealing film 1, and the inner surface of the second sealing film 2 has a composite ventilation structure for evacuating the sealed vacuum cavity 3. The composite ventilation structure includes multiple uniformly arrayed embossed units.

[0023] The raised textured unit is a hemispherical elastic protrusion 6. The compression rebound rate of the hemispherical elastic protrusion 6 is ≥85%, and it maintains a 0.1mm gap when compressed by 30%. The spacing between adjacent textured units is 8-12mm. The hemispherical elastic protrusion 6 has a better elastic recovery effect. The height of the raised textured unit decreases from 0.5mm near the vacuum check valve 5 to 0.2mm towards the edge, and the spacing between adjacent textured units is 8-12mm.

[0024] Example 2: Figure 6As shown, a vacuum packaging bag with built-in embossed texture includes a first sealing film 1, a second sealing film 2, and a sealed vacuum cavity 3 disposed between the two. The bottom and sides of the sealed vacuum cavity 3 are sealed and fixedly connected by the first sealing film 1 and the second sealing film 2. The upper part of the sealed vacuum cavity 3 is provided with an opening communicating with the outside. An elastic locking zipper 4 is provided at the opening. A vacuum one-way valve 5 is provided on the first sealing film 1. The inner surface of the second sealing film 2 is provided with a composite ventilation structure for vacuuming the sealed vacuum cavity 3. The composite ventilation structure includes multiple uniformly arrayed embossed units.

[0025] The raised texture unit is an L-shaped fish scale pattern 7, which consists of two connected diagonal stripes with an included angle of 110°-150°. The spacing between adjacent stripes of the L-shaped fish scale pattern 7 is 8-12mm. The height of the raised texture unit decreases from 0.5mm near the vacuum check valve 5 to 0.2mm towards the edge, and the spacing between adjacent raised texture units is 8-12mm.

[0026] Example 3: A vacuum packaging bag with built-in embossed texture, comprising a first sealing film 1, a second sealing film 2, and a sealed vacuum cavity 3 disposed between the two. The bottom and sides of the sealed vacuum cavity 3 are sealed and fixedly connected by the first sealing film 1 and the second sealing film 2. The upper part of the sealed vacuum cavity 3 is provided with an opening communicating with the outside. An elastic locking zipper 4 is provided at the opening. A vacuum one-way valve 5 is provided on the first sealing film 1. The inner surface of the second sealing film 2 is provided with a composite ventilation structure for vacuuming the sealed vacuum cavity 3. The composite ventilation structure includes multiple uniformly arrayed embossed units.

[0027] The raised stripe unit is a wedge-shaped raised stripe with a right-angled triangle cross-section. The inclined surface of the wedge-shaped raised stripe faces the vacuum one-way valve 5 and the inclination angle is 15°-30°. The height of the raised stripe unit decreases from 0.5mm near the vacuum one-way valve 5 to 0.2mm towards the edge, and the spacing between adjacent raised stripe units is 8-12mm.

[0028] Example 4: Figure 7 As shown, a vacuum packaging bag with built-in embossed texture includes a first sealing film 1, a second sealing film 2, and a sealed vacuum cavity 3 disposed between the two. The bottom and sides of the sealed vacuum cavity 3 are sealed and fixedly connected by the first sealing film 1 and the second sealing film 2. The upper part of the sealed vacuum cavity 3 is provided with an opening communicating with the outside. An elastic locking zipper 4 is provided at the opening. A vacuum one-way valve 5 is provided on the first sealing film 1. The inner surface of the second sealing film 2 is provided with a composite ventilation structure for vacuuming the sealed vacuum cavity 3. The composite ventilation structure includes multiple uniformly arrayed embossed units, a gradient microchannel structure 8, and a fractal topology structure.

[0029] The raised textured unit is a hemispherical elastic protrusion 6. The compression rebound rate of the hemispherical elastic protrusion 6 is ≥85%, and it maintains a 0.1mm gap when compressed by 30%. The spacing between adjacent textured units is 8-12mm. The hemispherical elastic protrusion 6 has a better elastic recovery effect. The height of the raised textured unit decreases from 0.5mm near the vacuum check valve 5 to 0.2mm towards the edge, and the spacing between adjacent textured units is 8-12mm.

[0030] The gradient microchannel structure 8 is composed of radial or herringbone-shaped raised stripes extending outward from the vacuum one-way valve 5. The height of the gradient microchannel structure 8 is adapted to the height of the raised stripe unit, and the arrayed raised stripe unit is disposed between the raised stripes of the gradient microchannel structure 8. The fractal topology is nested in the gradient microchannel structure 8. The fractal topology includes a main channel 9 and a secondary channel 10 that are interconnected. The main channel 9 has a width of 0.8 mm, and the secondary channel 10 has a width of 0.5 mm. The main channel 9 and the secondary channel 10 are provided with a plurality of air outlets 11 arranged along the channel, and the air outlets 11 are staggered.

[0031] The principle behind the ventilation structure is that the embossed units create ventilation gaps between the first sealing membrane 1 and the second sealing membrane 2 under normal conditions. During the initial extraction of air from the sealed vacuum chamber 3, these ventilation gaps maintain airflow within the chamber, preventing localized air bubbles caused by partial sealing closure, with residual bubble area <0.5%. Furthermore, the embossed units, through these ventilation gaps, shorten the vacuum formation time by more than 40%.

[0032] Obviously, the above embodiments of this utility model are merely illustrative examples and not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, these obvious variations or modifications derived from the essential spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A vacuum packaging bag with built-in embossed texture, comprising a first sealing film (1), a second sealing film (2), and a sealed vacuum cavity (3) disposed between the two, wherein the bottom and sides of the sealed vacuum cavity (3) are sealed and fixedly connected by the first sealing film (1) and the second sealing film (2), the upper part of the sealed vacuum cavity (3) is provided with an opening communicating with the outside, and an elastic locking zipper (4) is provided at the opening, and a vacuum one-way valve (5) is provided on the first sealing film (1), characterized in that: The inner surface of the second sealing membrane (2) is provided with a composite ventilation structure for sealing the vacuum chamber (3) during vacuuming. The composite ventilation structure includes multiple uniformly arrayed convex units.

2. The vacuum packaging bag with built-in embossed texture according to claim 1, characterized in that: The height of the raised unit decreases from 0.5 mm near the vacuum check valve (5) to 0.2 mm towards the edge, and the spacing between adjacent raised units is 8-12 mm.

3. A vacuum packaging bag with built-in embossed texture according to claim 1, characterized in that: The raised texture unit is a hemispherical elastic protrusion (6), the compression rebound rate of the hemispherical elastic protrusion (6) is ≥85%, it maintains a 0.1mm gap when compressed by 30%, and the spacing between adjacent stripes is 8-12mm.

4. A vacuum packaging bag with built-in embossed texture according to claim 1, characterized in that: The raised texture unit is an L-shaped fish scale pattern (7), which is composed of two connected diagonal stripes. The included angle between the two diagonal stripes is 110°-150°, and the spacing between adjacent stripes of the L-shaped fish scale pattern (7) is 8-12mm.

5. A vacuum packaging bag with built-in embossed texture according to claim 1, characterized in that: The raised stripe unit is a wedge-shaped raised stripe with a cross-section of a right triangle. The inclined surface of the wedge-shaped raised stripe faces the vacuum check valve (5) and the inclination angle is 15°-30°.

6. A vacuum packaging bag with built-in embossed texture according to claim 2, characterized in that: It also includes a gradient microchannel structure (8), which is composed of radial or fishbone-shaped raised stripes extending outward from the vacuum one-way valve (5). The height of the gradient microchannel structure (8) is adapted to the height of the raised stripe unit, and the arrayed raised stripe unit is disposed between the raised stripes of the gradient microchannel structure (8).

7. A vacuum packaging bag with built-in embossed texture according to claim 6, characterized in that: The composite ventilation structure also includes a fractal topology structure, which is nested in the gradient microchannel structure (8). The fractal topology structure includes a main channel (9) and a secondary channel (10) that are interconnected. The main channel (9) has a width of 0.8 mm, and the secondary channel (10) has a width of 0.5 mm. The main channel (9) and the secondary channel (10) are provided with a plurality of air outlets (11) arranged along the channel, and the air outlets (11) are arranged alternately.

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