An inner convex air-conducting vacuum packaging bag

Abstract

The present invention discloses an inner convex air-conducting vacuum packaging bag, which comprises a bag surface layer and a bag bottom layer, wherein the bag surface layer and the bag bottom layer are connected together to form a bag body with an open end, at least one of the inner side surfaces of the bag surface layer and the bag bottom layer is provided with a plurality of protrusions, and an air-conducting channel connecting the inner cavity of the bag body with the open end is formed between the protrusions. A vacuum pump performs a vacuuming operation on the inner cavity of the bag body through the open end of the bag body, and the air in the inner cavity of the bag body is transported to the open end through the air-conducting channel, and the air is subsequently evacuated by vacuuming. During this period, the air-conducting channel formed between the protrusions can keep the air in the bag body from being smoothly transported to the open end of the bag body, and avoid the bag surface layer and the bag bottom layer from being blocked from outflowing the air at the rear due to the adhesion generated after vacuuming, thereby effectively ensuring that the air in the bag body is maximally evacuated, and even achieving the effect of completely evacuating the air, thereby greatly improving the vacuuming effect of the packaging bag and ensuring the vacuum preservation effect of the packaged object in the packaging bag.

Description

Technical Field

[0001] The invention belongs to the field of fresh-keeping packaging, and in particular relates to an inwardly convex air-conducting vacuum packaging bag. Background Art

[0002] Vacuum packaging is a packaging method that puts the product into an airtight packaging container, removes the air inside the container, and makes the sealed container reach a predetermined vacuum degree. When the air is removed from the vacuum packaging bag and maintained at a highly reduced pressure, there is very little residual air in the bag, which inhibits the reproduction of bacteria and other microorganisms, avoids oxidation, mildew and corruption of the items, and makes it impossible for microorganisms to survive, so as to achieve the purpose of keeping the fruit fresh and preventing disease and corruption.

[0003] The existing vacuum packaging bags used in negative pressure vacuum machines have ordinary plastic films on both sides. The inner surface of the plastic film is very smooth and is generally made of flat film. When vacuuming, it is easy for the film near the bag opening to stick together, which hinders the extraction of air at the bottom of the bag cavity (i.e., the part away from the bag opening), thereby slowing down the vacuuming speed and blocking the continued extraction of air, reducing the vacuuming effect of the vacuum packaging bag, causing air to remain in the bag, affecting the preservation effect, and leaving a lot of gas in the bag. People are in urgent need of changing the internal structure of the vacuum packaging bag so that the air in the bag can be easily extracted cleanly using general vacuum extraction equipment. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an inwardly convex air-conducting vacuum packaging bag which has a simple structure and is easy to discharge the air in the bag.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an inwardly convex air-conducting vacuum packaging bag, which includes a bag surface layer and a bag bottom layer, and the bag surface layer and the bag bottom layer are connected together to form a bag body with an open end, characterized in that: at least one of the inner side surfaces of the bag surface layer and the bag bottom layer is provided with a plurality of protrusions, and an air-conducting channel connecting the inner cavity of the bag body with the open end is formed between the protrusions, and the air in the inner cavity of the bag body is transported to the open end through the air-conducting channel.

[0006] Furthermore, the convex air-conducting vacuum packaging bag has a circular protrusion; or, the protrusion is any two or three of a circle, an octagon, or a nonagon arranged adjacently and differently, and the protrusions on the inner side of the bag surface layer and the protrusions on the inner side of the bag bottom layer are arranged in an up-and-down manner.

[0007] Furthermore, in the above-mentioned inwardly convex air-conducting vacuum packaging bag, a tearing notch for tearing the bag body to the inner cavity of the bag body is provided at the interconnected position of the bag surface layer and the bag bottom layer.

[0008] Furthermore, in the above-mentioned inwardly convex air-conducting vacuum packaging bag, the tear notch is arranged on the left side or the right side of the bag body.

[0009] Furthermore, in the above-mentioned inwardly convex air-conducting vacuum packaging bag, the opening end is sealed by a zipper or a thermoplastic seal.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a plurality of protrusions on at least one of the inner sides of the bag surface layer and the bag bottom layer, and an air guide channel connecting the inner cavity of the bag body with the open end is formed between the protrusions. The vacuum pump performs a vacuum operation on the inner cavity of the bag body through the open end of the bag body, and the air in the inner cavity of the bag body is transported to the open end through the air guide channel, and the air is subsequently evacuated by vacuuming. During this period, the air guide channel formed between the protrusions can keep the air in the bag body from being smoothly transported to the open end of the bag body, avoiding the surface layer and the bottom layer of the bag from being blocked from outflowing air at the rear due to the adhesion after vacuuming, effectively ensuring that the air in the bag body is maximally extracted, and even achieving the effect of completely extracting the air, thereby greatly improving the vacuuming effect of the packaging bag and ensuring the vacuum preservation effect of the packaged object in the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 It is a top view of the present invention.

[0013] Figure 3 This is the first embodiment of the present invention.

[0014] Figure 4 This is the second embodiment of the present invention.

[0015] Figure 5 yes Figure 4 Enlarged view of point A in the middle (the arrow in the figure indicates the direction of air flow).

[0016] Figure 6 It is a structural diagram of a vacuum packaging machine.

[0017] In the figure: bag body 1, bag surface layer 2, bag bottom layer 3, protrusion 4, air guide channel 5, tear notch 6, machine body 7, heating strip 8, vacuum chamber 9, sealing strip 10. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1As shown, this embodiment provides an inwardly convex air-conducting vacuum packaging bag, which includes a bag surface layer 2 and a bag bottom layer 3, both of which are thin films, preferably food-grade films. The bag surface layer 2 and the bag bottom layer 3 are connected together to form a bag body 1 with an open end, that is, one end of the bag body 1 is an open end, which is the so-called bag opening, and the remaining edge parts are bonded together by the bag surface layer 2 and the bag bottom layer 3. During this period, the open end can also be sealed by a zipper or thermoplastic. Preferably, the interconnected position of the bag surface layer 2 and the bag bottom layer 3 is provided with a tearing notch 6 for tearing the bag body 1 to the inner cavity of the bag body 1. The tearing notch 6 is arranged on the left or right side of the bag body 1. The tearing notch 6 can be located near the open end or near the bottom end of the bag body according to different designs, so as to facilitate daily use by users.

[0020] like Figures 1 to 4 As shown, at least one of the inner sides of the bag surface layer 2 and the bag bottom layer 3 is provided with a plurality of protrusions 4. In the specific product preparation process, it is best to simultaneously provide the above-mentioned protrusions 4 on the inner sides of the bag surface layer 2 and the inner sides of the bag bottom layer 3. An air guide channel 5 is formed between the protrusions 4 to connect the inner cavity of the bag body 1 with the said opening end. The air in the inner cavity of the bag body 1 is transported to the said opening end through the air guide channel 5. The vacuum pump performs a vacuum operation on the inner cavity of the bag body 1 through the opening end of the bag body 1. The air in the inner cavity of the bag body is transported to the opening end through the air guide channel 5. The air is then vacuumed away. During this period, the air guide channel 5 formed between the protrusions can keep the air in the bag body unimpeded and transported to the opening end of the bag body.

[0021] Figure 3 The embodiment 1 is shown in which the protrusions 4 are circular and are evenly arranged in several rows and columns on the inner side of the bag surface layer 2 and the inner side of the bag bottom layer 3. The width L of the gaps formed between the protrusions 4 is 0.5 mm. Figure 3During this period, the protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 can be arranged in the following two upper and lower forms: (A) The protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 correspond to each other up and down, that is, the protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 are arranged to overlap each other. This arrangement makes the air guide channel 5 formed between the protrusions 4 have a sufficient height, so that the air to be sucked has a sufficiently high flow gap, and can also avoid the air guide channel 5 being blocked by foreign matter to the greatest extent; (B) The protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 are arranged to be staggered up and down, that is, the protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 are arranged to be non-overlapping. This arrangement method realizes that the air guide channel 5 has a sufficient number from another aspect, so that the air in the bag body can be quickly sucked outward, and the effect of rapid vacuuming is achieved. When the air in the inner cavity of the bag body 1 is extracted, the open end is connected to the suction end of the vacuum pump. Due to the presence of the protrusions 4, the bag surface layer 2 and the bag bottom layer 3 will not be tightly attached together, and an air guide channel 5 is formed between the protrusions. When the air at the open end is completely extracted, the air pressure at the open end is lower than the air pressure at the bottom of the inner cavity of the bag body 1, and a negative pressure relative to the bottom of the inner cavity of the bag body 1 is formed at the open end. Therefore, the air at the bottom of the inner cavity of the bag body 1 will be quickly extracted to the open end, and the air in the inner cavity of the bag body 1 will flow along the air guide channel 5 toward the direction of the open end until the air in the inner cavity of the bag body 1 is completely extracted, so that the air in the packaging bag is completely sucked out without any air residue. Compared with the traditional vacuum packaging bag with a smooth inner cavity, the air extracted is cleaner and faster.

[0022] like Figures 4 to 5As shown in Example 2, the protrusions 4 are circular, octagonal, and nonagonal shapes arranged adjacently and differently, and they are arranged adjacently and differently in the longitudinal and transverse directions in sequence, and the gap widths L formed between the protrusions 4 of different shapes are different. Specifically, the shapes of the protrusions 4 adjacent to each other in the axial and longitudinal directions are different. The adjacent differences shown here only refer to the four directions of up, down, left, and right of each protrusion, resulting in a ventilation effect between adjacent gaps, which can form an air pressure difference between the gaps. The air pressure difference includes relatively high pressure and low pressure, forming a pressure siphon effect between the gaps, which plays an auxiliary role in evacuating the airflow. During this period, considering the longitudinal or transverse arrangement layout or differentiation, the protrusions 4 in the oblique direction of each protrusion 4 can be of the same shape, the overall gap width L1 between the circular protrusion 4 and the regular octagonal protrusion 4 is greater than 0.5mm, the overall gap width L2 between the regular octagonal protrusion 4 and the regular pentagonal protrusion 4 is less than 0.5mm, and the overall gap width L3 between the regular pentagonal protrusion 4 and the circular protrusion 4 is greater than 0.5mm. In this technical solution, the protrusions 4 on the inner side of the bag surface layer 2 and the protrusions 4 on the inner side of the bag bottom layer 3 also have two upper and lower arrangements, which can be seen from the description of (A) and (B) of the above-mentioned embodiment 1, and will not be repeated here. When the air in the inner convex air-conducting vacuum packaging bag is extracted, different local air pressure differences are formed between adjacent and different protrusions 4, and the air close to the opening end is extracted first, so that the air at the bottom end of the inner cavity of the bag body 1 flows along the air guide channel 5 toward the local negative pressure. Figure 5 As shown, part of the air guide channel 5 forms auxiliary air extraction, and because there is always a local minimum pressure at the open end, all the air in the packaging bag will eventually flow to the open end until it is completely discharged from the bag. Compared with Example 1, Example 2 can better achieve the vacuum effect, and the formation of local negative pressure can better guide the outflow of air, and the air can be extracted more quickly and completely.

[0023] In addition, as a variation of the embodiment, based on embodiment 2, the protrusion 4 can be any two of a circle, an octagon, or a nonagon arranged adjacently and differently, that is, the protrusion 4 can be a combination of a circle and an octagon, or a combination of a circle and a nonagon, or a combination of an octagon and a nonagon, and the manufacturer can set it as needed.

[0024] Experiments have shown that when the oxygen concentration in the packaging bag is ≤1%, the growth and reproduction rate of microorganisms will drop sharply. When the oxygen concentration is ≤0.5%, most microorganisms will be inhibited and stop reproducing. In addition to inhibiting the growth and reproduction of microorganisms, another important function of vacuum deoxygenation is to prevent food oxidation. Because oily foods contain a large amount of unsaturated fatty acids, they will be oxidized by oxygen, causing the food to change taste and deteriorate. In addition, oxidation also causes the loss of vitamins A and C. The unstable substances in food pigments are affected by oxygen, causing the color to darken. Therefore, deoxygenation can effectively prevent food from deteriorating and maintain its color, aroma, taste and nutritional value.

[0025] In addition, the most commonly used vacuum packaging materials are film materials, and of course bottles and cans are also used. The film materials used for food vacuum packaging must ensure that they are in the best state in terms of packaging effect, beauty, economy, etc. for various foods. At the same time, food vacuum packaging also has high requirements for the light barrier and stability of the material. When a single material cannot meet these requirements, the package is often composed of a combination of multiple different materials. The materials of the inner convex air-conducting vacuum packaging bag can be PE, RCPP, PA, AL, PET, etc. Among them, PE is suitable for low-temperature use, RCPP is suitable for high-temperature cooking; PA is to increase physical strength and puncture resistance; AL aluminum foil is to increase barrier properties and light shielding; PET, increase mechanical strength, excellent stiffness. Then according to the needs, various properties are combined, and there are also transparent ones, and water-resistant PVA high barrier coating is used to increase barrier properties.

[0026] In order to cooperate with the sealing of the vacuum packaging bag of the above embodiment, it is known to those skilled in the art that the opening end of the vacuum packaging bag can be sealed by a zipper, or the bag surface layer 2 and the bag bottom layer 3 can be thermoplastically sealed by a vacuum packaging machine. The present invention preferably uses a vacuum packaging machine to thermoplastically seal the bag surface layer 2 and the bag bottom layer 3, such as Figure 6As shown. This household vacuum packaging machine includes a body 7, in which a vacuum cavity 9 is symmetrically arranged from top to bottom, a heating strip 8 is arranged on the upper layer of the body 7, and a sealing strip 10 is arranged around the cavity opening of the vacuum cavity 9. The open end of the inwardly convex air-conducting vacuum packaging bag is placed between the heating strip 8 and the sealing strip 10 of the vacuum packaging machine, and the open end is not connected to the vacuum cavity 9, so that the vacuum cavity 9 can be evacuated. The sealing strip 10 is preferably a silicone strip, which has good elasticity and good sealing effect. Of course, all the sealing strips used in existing vacuum packaging machines can also be selected. Then the heating strip 8 and the sealing strip 10 are pre-pressed, and then the vacuum cavity 9 of the vacuum packaging machine is pre-evacuated, so that the heating strip 8 and the sealing strip 10 are further compressed by the negative pressure of the vacuum cavity 9. By evacuating the vacuum chamber 9, the air pressure in the vacuum chamber 9 is made lower than the external atmospheric pressure. The external atmospheric pressure causes the sealing strip 10 installed on one side of the vacuum chamber 9 to form a state of pressing down the heating strip 8 in a linked manner, and the heating strip 8 is further compressed to make the gap between the heating strip 8 and the sealing strip 10 as small as possible. The heat of the heating strip 8 is more fully transferred to the opening end of the inward convex air-conducting vacuum packaging bag. The pressure makes the seal more perfect, and at the same time, the processing accuracy of the sealing strip 10 and the sealing gasket assembly is relaxed, reducing the production cost. Finally, the power supply is connected to the heating strip 8 to energize and generate heat, and the opening end of the inward convex air-conducting vacuum packaging bag is heated, melted, and bonded to achieve sealing. The heating time is selected according to the actual situation. This can be easily achieved by those skilled in the art and will not be described in detail here.

[0027] The household vacuum packaging machine is suitable for sealing with composite film or aluminum foil bags. It is small in size, practical in function and easy to operate. The price of single-chamber vacuum packaging machine is the most economical and affordable type. The fully automatic small vacuum packaging machine adopts microcomputer program control operating system and mechatronics technology, which largely meets the needs of people's daily life. For example, preserving food and bedding. The characteristics of the vacuum packaging machine are that it adopts the fixed instant heating method of the hot box to save energy, adopts special electric heating arrangement, and the heat distribution is uniform. It is also small in size, occupies a small area, and the sealing operation is simple and fast, which is easy to operate.

[0028] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An inwardly convex air-conducting vacuum packaging bag, comprising a bag surface layer (2) and a bag bottom layer (3), wherein the bag surface layer (2) and the bag bottom layer (3) are connected together to form a bag body (1) having an open end, characterized in that: At least one of the inner side surfaces of the bag surface layer (2) and the bag bottom layer (3) is provided with a plurality of protrusions (4), and an air guide channel (5) is formed between the protrusions (4) to connect the inner cavity of the bag body (1) with the open end, and the air in the inner cavity of the bag body (1) is transported to the open end through the air guide channel (5); The protrusions (4) are formed by any two or three of a circle, an octagon or a nonagon being arranged adjacently and differently; The protrusions (4) on the inner side of the bag surface layer (2) and the protrusions (4) on the inner side of the bag bottom layer (3) are arranged in an up-and-down manner.

2. The inwardly convex air-conducting vacuum packaging bag according to claim 1, characterized in that: A tearing notch (6) for tearing the bag body (1) to the inner cavity of the bag body (1) is provided at the mutually connected position of the bag surface layer (2) and the bag bottom layer (3).

3. The inwardly convex air-conducting vacuum packaging bag according to claim 2, characterized in that: The tear notch (6) is arranged on the left side or the right side of the bag body (1).

4. The inwardly convex air-conducting vacuum packaging bag according to claim 1, characterized in that: The open end is sealed by a zipper or thermoplastic.

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