Fixed-area deflation air column bag

Abstract

The invention relates to a fixed-area deflation air column bag which comprises an upper film, a lower film and a first air valve film, the peripheries of the upper film and the lower film are sealed to form a bag body, the bag body is provided with a vertical sealing and cutting line which does not penetrate through the whole bag body to form an air column cavity, one end of the vertical sealing and cutting line is provided with a first transverse sealing and cutting line, and the other end of the vertical sealing and cutting line is provided with a second transverse sealing and cutting line. An air inlet channel is formed between the first transverse sealing and cutting line and the upper edge of the bag body, the first air valve film is sealed and adhered between the upper thin film and the lower thin film through the first transverse sealing and cutting line, and the first air valve film enables air to enter the air column cavity from the air inlet channel and not to flow reversely; a second transverse sealing and cutting line is arranged at the end, away from the air inlet channel, of the vertical sealing and cutting line, a deflation cavity is formed between the second transverse sealing and cutting line and the lower edge of the bag body, the second air valve film is sealed and bonded between the upper thin film and the lower thin film through the second transverse sealing and cutting line, and the second air valve film enables air to enter the deflation cavity from the air column cavity and not to flow reversely.

Description

Technical Field

[0001] The invention relates to the field of packaging materials, in particular to an air column bag with fixed-area deflation. Background Art

[0002] Air bag is a modern packaging material, usually used to protect and fill goods during transportation to reduce shock and vibration during transportation, thus protecting the product from damage. It is an efficient, economical and environmentally friendly packaging solution, and its application is becoming more and more extensive with the growth of e-commerce and global trade.

[0003] Along with this, the use of air bags also brings some problems, one of which has received much attention: how to quickly discharge the gas after using the air bag so that the discarded air bag takes up less space, thereby facilitating the recovery, storage and cleaning of the air bag.

[0004] The Chinese invention patent with application number 202310035541.7, titled A Rapid Deflation Air Column Bag and Air Column Bag Production Process, proposes a corresponding solution: a tear-off strip is provided on the outside of the bag body, and the tear-off strip has a bonding point with each air column cavity. A high-temperature ink layer is applied at the corresponding bonding point, so that the high temperature cannot melt the film coated with the high-temperature ink, and the tear-off strip is bonded to the outside of the lower film. This solution solves the problem of rapid destruction of the air column bag after use, and also fully considers the processing technology of the air column bag.

[0005] However, this solution still has some obvious problems: in order to ensure the strength of the air column bag, the air column bag film is often thicker, and it takes a lot of force to tear the air column bag film with high strength through the hot sticking point of the pull strip. The pull strip may break during the tearing process, and all the air columns cannot be destroyed at one time. Summary of the invention

[0006] In view of the defects of the prior art, the technical problem to be solved by the present invention is to provide a fixed-area deflation air column bag, which can release the gas of all air columns at one time more efficiently and stably after inflation, saving time and effort.

[0007] In order to solve the above technical problems, the present invention proposes a fixed area deflation air column bag, which adopts the following technical solutions:

[0008] A fixed-area deflation air column bag comprises an upper film, a lower film and a first air valve film. The upper film and the lower film are sealed around to form a bag body. The bag body is provided with a vertical sealing line that does not penetrate the entire bag body to form an air column cavity. A first transverse sealing line is provided at one end of the vertical sealing line. An air inlet channel is formed between the first transverse sealing line and the upper edge of the bag body. The first air valve film is sealed to the upper film and the lower film through the first transverse sealing line. The first air valve film allows gas to enter the air column cavity from the air inlet channel without being able to flow in the opposite direction. The second air valve film is also included. A second transverse sealing line is provided at one end of the vertical sealing line away from the air inlet channel. A deflation cavity is formed between the second transverse sealing line and the lower edge of the bag body. The second air valve film is sealed to the upper film and the lower film through the second transverse sealing line. The second air valve film allows gas to enter the deflation cavity from the air column cavity without being able to flow in the opposite direction.

[0009] First of all, you need to pay attention to the gas flow direction of the first air valve membrane and the second air valve membrane. When inflating, the gas can enter the air column cavity from the air inlet channel through the first air valve membrane. Since the second air valve membrane allows the gas to enter the deflation cavity from the air column cavity and cannot flow in the opposite direction, the gas flows from the air column cavity into the deflation cavity. When the deflation cavity is inflated to a certain air pressure, it reaches a full state, the second air valve membrane is closed, and the gas no longer enters the deflation cavity through the second air valve membrane, and the air column cavity is gradually filled. When deflation is rapid, you only need to destroy the deflation cavity, and the gas in the deflation cavity will flow out to form a loss of pressure. At this time, due to the pressure difference, the second air valve membrane will be flushed open, and all the gas in the air column cavity will flow through the deflation cavity and out of the air column bag, completing a one-time deflation.

[0010] Preferably, after the vertical sealing line passes through the second horizontal sealing line, it continues to extend toward the lower edge of the bag body to divide the deflation cavity. The portion of the vertical sealing line located at the deflation cavity is provided with a deflation notch, and the deflation notch makes the two adjacent deflation cavities incompletely separated. If the deflation cavity is not provided with a vertical sealing line, the deflation cavity will expand freely after inflation, and its thickness will be larger than that of the air column cavity. By extending the vertical sealing line, the thickness of the deflation cavity can be kept consistent with that of the air column cavity, and the size consistency of the product is good. The deflation notch is provided so that in order to achieve the effect of uniform deflation, the air columns of the deflation cavity need to be connected to each other, so that even if only one of the air columns in the deflation cavity is destroyed, the air column bag can be deflated, and the gas of all the air columns can be released efficiently and stably at one time.

[0011] Further, the vertical sealing line extends to the lower edge near the bag body but is not connected with the lower edge to form a deflation gap. Under this structure, gas can pass through the deflation gap smoothly, and exhaust is smooth.

[0012] Furthermore, the vertical sealing line extends to and is connected to the lower edge of the bag body, the lower edge of the second air valve film is higher than the lower edge of the bag body, and the deflation notch is set between the second transverse sealing line on the vertical sealing line and the lower edge of the second air valve film. With such a structure, the vertical sealing line can completely divide the deflation cavity, ensuring that there is no separate transverse bulge in the deflation cavity, while still being able to achieve one-time deflation, and further improving the structural consistency.

[0013] Preferably, a concave portion is provided on the second transverse sealing line, which is sunken from the horizontal portion to one side of the air column cavity, and a high-temperature ink dot is provided on the concave portion, and the top of the high-temperature ink dot is not higher than the horizontal portion of the second transverse sealing line. Since the deflation cavity is a key part of the air column bag, it must be avoided from being accidentally damaged during use. The key is to control its width to reduce the probability of accidents. By adopting such a concave portion setting on the second transverse sealing line, the height of the apex of the high-temperature ink is reduced to achieve the goal of shortening the width of the second air valve membrane and thus shortening the width of the deflation cavity.

[0014] Furthermore, the second air valve membrane is provided with an air entrainment sealing line, which includes a first arc segment and a second arc segment, the first arc segment is connected to the second arc segment at the end, and both the first arc segment and the second arc segment are convex toward the center of the air column cavity. After the air entrainment sealing line is specially designed in this way, when the gas fills the air column bag, the convex arc line forms resistance to the refluxed gas, forming a bundling effect at the air inlet, which effectively improves the air locking effect. At the same time, it avoids the use of the air guide point used in general air column bags, further shortens the width of the second air valve membrane, and further shortens the width of the deflation cavity.

[0015] Specifically, the deflation cavity is an integrated transverse air column without internal divisions, and the width of the deflation cavity is not greater than the width of the air column cavity. By controlling the width of the second air valve membrane, the overall width of the deflation cavity is controlled to be equivalent to the width of the air column cavity. When inflated, the air column cavity and the deflation cavity will have the same width, completely solving the problem of overall width consistency of the air column bag.

[0016] Preferably, the deflation cavity is provided with a deflation hole and a sealing member, and the sealing member seals and covers the deflation hole. The thickness of the sealing member is consistent with that of the upper and lower film materials, which reduces the probability of bulging, and the sealing member is designed to be easy to pull, which can easily destroy the deflation cavity and effectively improve the deflation efficiency.

[0017] Furthermore, the venting hole is in the shape of an elongated strip, and the length direction of the venting hole extends along the parallel direction of the air column cavity. Such a setting increases the venting area and realizes efficient one-time release of all gases.

[0018] Preferably, the upper film, the lower film, the first valve film and the second valve film are all made of metallocene polyethylene. Metallocene polyethylene refers to polyethylene obtained by catalytic polymerization of metallocene catalysts, which is characterized by a narrow relative molecular weight distribution and a long branched molecular chain structure with uniform distribution. When it is blended with ordinary linear low-density polyethylene, it can significantly improve the strength, toughness and puncture resistance of linear low-density polyethylene and improve the transparency of the film.

[0019] The adoption of such a technical solution greatly improves the efficiency and stability of releasing all the gas in the air column at one time after inflation, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 is a schematic structural diagram of a first embodiment of the venting notch of the embodiment;

[0022] Figure 2 This is the embodiment Figure 1 A schematic cross-sectional view of the area along section line A;

[0023] Figure 3 This is the embodiment Figure 2 An enlarged schematic diagram of icon C;

[0024] Figure 4 is a schematic structural diagram of a second embodiment of the venting notch of the embodiment;

[0025] Figure 5 is a schematic diagram of the structure of a compact air-entraining and sealing line deflation chamber used in the embodiment;

[0026] Figure 6 This is the embodiment Figure 5 A schematic cross-sectional view of the area along section line B;

[0027] Figure 7 is a schematic diagram of the structure of the venting notch and the sealing member of the embodiment;

[0028] Among them, there are upper film -1, lower film -2, first air valve film -3, bag body -4, vertical sealing line -41, first transverse sealing line -42, air inlet channel -43, second air valve film -44, air inlet sealing line -441, first arc segment -442, second arc segment -443, second transverse sealing line -45, deflation cavity -46, deflation hole -461, lower recess -47, air column cavity -48, deflation notch -5, and sealing member -6. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] A fixed-area deflation air column bag, comprising an upper film 1, a lower film 2 and a first air valve film 3, wherein the upper film 1 and the lower film 2 are sealed around to form a bag body 4, and a vertical sealing line 41 that does not penetrate the entire bag body is provided on the bag body 4 to form an air column cavity 48, and a first transverse sealing line 42 is provided at one end of the vertical sealing line 41, and an air inlet channel 43 is formed between the first transverse sealing line 42 and the upper edge of the bag body 4, and the first air valve film 3 is sealed and bonded to the upper film 1 and the lower film 2 through the first transverse sealing line 42, and the first The air valve membrane 3 allows gas to enter the air column cavity 48 from the air inlet channel 43 without flowing in the opposite direction, and also includes a second air valve membrane 44. A second transverse sealing line 45 is provided at the end of the vertical sealing line 41 away from the air inlet channel 43. A deflation cavity 46 is formed between the second transverse sealing line 45 and the lower edge of the bag body 4. The second air valve membrane 44 is sealed to the upper film 1 and the lower film 2 through the second transverse sealing line 45. The second air valve membrane 44 allows gas to enter the deflation cavity 46 from the air column cavity 48 without flowing in the opposite direction.

[0031] The double air valve membrane design takes advantage of the air valve membrane's characteristic of only letting in but not letting out. When inflating, each air column cavity 48 will inflate into the deflation cavity 46, so that the air pressure in the deflation cavity 46 is equal to the air pressure in the air column cavity 48, and the gas in the deflation cavity 46 will not flow into the air column cavity 48, preventing the air column cavity 48 from rupturing due to excessive air pressure, and maintaining the air pressure balance of the air column cavity 48. When the deflation cavity 46 is deflated, the air pressure imbalance between the air column cavity 48 and the deflation cavity 46 causes the gas in the air column cavity 48 to flow into the deflated deflation cavity 46, thereby achieving full deflation of the air column cavity 48. This design is equivalent to maintaining the independence of each air column cavity 48, while achieving unified deflation of the air column cavity 48. After inflation, the gas of all air columns can be released at once more efficiently and stably, saving time and effort.

[0032] As a first implementation of the deflation cavity 46, the vertical sealing line 41 passes through the second transverse sealing line 45 and continues to extend toward the lower edge of the bag body 5 to divide the deflation cavity 48. The portion of the vertical sealing line 41 located at the deflation cavity 48 is provided with a deflation notch 5, and the deflation notch 5 makes the two adjacent deflation cavities 46 incompletely separated. If the deflation cavity 46 is not provided with a vertical sealing line 41, the deflation cavity 46 will expand freely after being inflated, and will be thicker than the air column cavity 48 in thickness. By extending the vertical sealing line 41, the thickness of the deflation cavity 46 can be kept consistent with that of the air column cavity 48, and the product has good dimensional consistency. The deflation notch 5 is provided so that in order to achieve the effect of uniform deflation, the air columns of the deflation cavity 46 need to be connected to each other, so that even if only one of the air columns in the deflation cavity 46 is destroyed, the air column bag can be deflated, and the gas of all the air columns can be released at one time efficiently and stably.

[0033] like Figure 1 , Figure 2 as well as Figure 3 As shown, the vertical sealing line 41 extends to the lower edge of the bag body 4 but is not connected to the lower edge to form the degassing gap 5. Under this structure, the gas can pass through the degassing gap 5 smoothly, and the exhaust is smooth.

[0034] Further, as another implementation of the venting notch 5, as Figure 4 As shown, the vertical sealing line 41 extends to and is connected to the lower edge of the bag body 4, the lower edge of the second air valve film 44 is higher than the lower edge of the bag body 4, and the deflation notch 5 is arranged between the second transverse sealing line 45 on the vertical sealing line 41 and the lower edge of the second air valve film 44. With such a structure, the vertical sealing line 41 can completely divide the deflation cavity 46, ensuring that the deflation cavity 46 has no separate transverse bulge, while still being able to achieve one-time deflation, and further improving the structural consistency.

[0035] As a second embodiment of the venting cavity 46, Figure 5 as well as Figure 6 As shown, the second transverse sealing line 45 is provided with a concave portion 47 which is sunken from the horizontal portion to one side of the air column cavity 48, and a high-temperature ink dot is provided on the concave portion 47, and the top of the high-temperature ink dot is not higher than the horizontal portion of the second transverse sealing line 45. Since the deflation cavity 46 is a key part of the air column bag, it must be avoided from being accidentally damaged during use. The key is to control its width to reduce the probability of accidents. By adopting such a concave portion 47 on the second transverse sealing line 45, the height of the apex of the high-temperature ink is reduced to shorten the width of the second air valve film 44, thereby shortening the width of the deflation cavity 46, and reducing the cavity height of the deflation cavity 46 after inflation, thereby effectively improving the overall surface flatness of the air column bag.

[0036] Furthermore, the second air valve membrane 46 is provided with an air entrainment sealing line 441, which includes a first arc segment 442 and a second arc segment 443, wherein the first arc segment 442 is connected to the second arc segment 443 at the end, and both the first arc segment 442 and the second arc segment 443 are convex toward the center of the air column cavity 48. After the air entrainment sealing line 441 is specially designed in this way, when the air column bag is filled with gas, the convex arc line forms resistance to the refluxed gas, forming a bundling effect at the air inlet, which effectively improves the air locking effect. At the same time, the air guide point used in general air column bags is avoided, the width of the second air valve membrane 44 is further shortened, the width of the deflation cavity 46 is further shortened, and the problem of the overall surface flatness of the air column bag is further improved.

[0037] Specifically, the deflation cavity 46 is an integral transverse air column without internal divisions, and the width of the deflation cavity 46 is not greater than the width of the air column cavity 48. By controlling the width of the second air valve membrane 44, the overall width of the deflation cavity 46 is controlled to be equivalent to the width of the air column cavity 48. When inflated, the air column cavity 48 and the deflation cavity 46 will have the same width, completely solving the problem of overall width consistency of the air column bag.

[0038] Preferably, the deflation cavity 46 is provided with a deflation hole 461 and a blocking member 6, and the blocking member 6 seals and covers the deflation hole 461. The blocking member 6 has the same thickness as the upper and lower film materials, which reduces the probability of bulging, and the blocking member 6 is designed to be easy to pull, which can easily destroy the deflation cavity 46, effectively improving the deflation efficiency.

[0039] Further, such as Figure 7 As shown, the air release hole 461 is in the shape of an elongated strip, and the length direction of the air release hole 461 extends along the parallel direction of the air column cavity 48. Such a setting increases the area of ​​air release, and realizes efficient one-time release of all gases.

[0040] Preferably, the upper film 1, the lower film 2, the first air valve film 3 and the second air valve film 44 are all made of metallocene polyethylene. Metallocene polyethylene refers to polyethylene obtained by catalytic polymerization of metallocene catalysts, which is characterized by a narrow relative molecular weight distribution, a long branched molecular chain structure and uniform distribution. When it is blended with ordinary linear low-density polyethylene, the strength, toughness and puncture resistance of the linear low-density polyethylene can be significantly improved, and the transparency of the film can be improved.

[0041] The adoption of such a technical solution greatly improves the efficiency and stability of releasing all the gas in the air column at one time after inflation, saving time and effort.

[0042] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixed-area deflation air column bag, comprising an upper film, a lower film and a first air valve film, wherein the upper film and the lower film are sealed around to form a bag body, the bag body is provided with a vertical sealing line that does not penetrate the entire bag body to form an air column cavity, one end of the vertical sealing line is provided with a first transverse sealing line, an air inlet channel is formed between the first transverse sealing line and the upper edge of the bag body, the first air valve film is sealed and bonded to the upper film and the lower film through the first transverse sealing line, the first air valve film allows gas to enter the air column cavity from the air inlet channel without reverse flow, characterized in that: It also includes a second air valve film, and a second transverse sealing line is provided at one end of the vertical sealing line away from the air inlet channel, and a deflation cavity is formed between the second transverse sealing line and the lower edge of the bag body. The second air valve film is sealed to the upper film and the lower film through the second transverse sealing line, and the second air valve film allows gas to enter the deflation cavity from the air column cavity but cannot flow in the opposite direction.

2. The fixed area deflation air column bag according to claim 1, characterized in that: The vertical sealing line passes through the second transverse sealing line and continues to extend toward the lower edge of the bag body to divide the deflation cavity. A deflation notch is provided on the portion of the vertical sealing line located at the deflation cavity, and the deflation notch incompletely separates two adjacent deflation cavities.

3. The fixed area deflation air column bag according to claim 2, characterized in that: The vertical sealing line extends to the lower edge of the bag body but is not connected to the lower edge to form the deflation gap.

4. The fixed area deflation air column bag according to claim 2, characterized in that: The vertical sealing line extends to and is connected to the lower edge of the bag body, the lower edge of the second air valve film is higher than the lower edge of the bag body, and the deflation notch is arranged between the second transverse sealing line on the vertical sealing line and the lower edge of the second air valve film.

5. The fixed area deflation air column bag according to claim 1, characterized in that: The second transverse sealing line is provided with a concave portion which is sunken from the horizontal portion toward one side of the air column cavity, and the concave portion is provided with a high-temperature ink dot, and the top of the high-temperature ink dot is not higher than the horizontal portion of the second transverse sealing line.

6. The fixed area deflation air column bag according to claim 5, characterized in that: The second air valve film is provided with an air entrainment sealing line, which includes a first arc segment and a second arc segment, the first arc segment is connected to the second arc segment at the end, and the first arc segment and the second arc segment are both convex toward the center of the air column cavity.

7. The fixed area deflation air column bag according to claim 6, characterized in that: The degassing cavity is an integral transverse air column without internal divisions, and the width of the degassing cavity is not greater than the width of the air column cavity.

8. The fixed area deflation air column bag according to any one of claims 1 to 7, characterized in that: The degassing cavity is provided with a degassing hole and a sealing member, and the sealing member seals and covers the degassing hole.

9. The fixed area deflation air column bag according to claim 8, characterized in that: The air release hole is in the shape of an elongated strip, and the length direction of the air release hole extends along the parallel direction of the air column cavity.

10. The fixed area deflation air column bag according to claim 9, characterized in that: The upper film, the lower film, the first air valve film and the second air valve film are all made of metallocene polyethylene.

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