Packaging bag with built-in suction port and manufacturing process thereof

Abstract

The present invention relates to the technical field of packaging bags, and in particular to a packaging bag with a built-in suction port and a manufacturing process thereof, wherein the packaging bag comprises: a bag body having an opening; an outer film arranged at the opening of the bag body, the outer film having an easy-tear line along a first direction, and first vertical sealing edges on both sides of the outer film along a second direction; an inner film arranged on the inner side of the outer film, having second vertical sealing edges on both sides of the inner film, and a first easy-tear opening on the top of the inner film; an empty sealing area is provided between the second vertical sealing edge and the first vertical sealing edge on the same side, and the first easy-tear opening is closer to the opening of the bag body than the easy-tear line. The present invention provides an easy-tear line on the outer film, and also provides a first easy-tear opening below the sealing area of ​​the inner film, and leaves an empty sealing area between the inner edge line of the first vertical sealing edge and the outer edge line of the second vertical sealing edge, thereby ensuring that during the tearing process, the outer film removes the portion above the easy-tear line and the inner film removes the portion above the first easy-tear opening, thereby ensuring safety and hygiene.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging, and in particular to a packaging bag with a built-in suction port and a manufacturing process thereof. Background Art

[0002] Currently, for disposable packaging products on the market, most of them are packaged in strip bags or small stand-up bags or three-side sealed bags with special shapes punched out of the bag mouth.

[0003] However, in high-end markets like nutritional supplements and health products, consumers hold themselves to high standards for product hygiene and safety, and are concerned about secondary contamination before consumption. For example, contamination can occur during hand-to-hand contact or when tearing the bag open with bare hands. Using the lips to consume the product in these situations inevitably creates hygiene and safety concerns. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a packaging bag with a built-in suction port and a manufacturing process thereof, so as to solve the problem in the prior art that the packaging bag will not contaminate the area where the mouth is sucked when it is torn open by hand.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a packaging bag with a built-in suction port, comprising:

[0007] a bag body having an opening;

[0008] An outer film is provided at the opening of the bag body, and the outer film has an easy-tear line along a first direction, and both sides of the outer film have first vertical sealing edges along a second direction;

[0009] An inner film is provided on the inner side of the outer film, and the two sides of the inner film have second vertical sealing edges, and the top of the inner film is provided with a first easy-tear opening;

[0010] There is an empty sealing area between the second vertical sealing edge and the first vertical sealing edge on the same side, and the first easy-tear opening is closer to the opening of the bag body than the easy-tear line.

[0011] According to the packaging bag with a built-in suction port provided by the present invention, the bag body includes a three-side sealed bag, a four-side sealed bag or a stand-up bag.

[0012] According to the packaging bag with a built-in suction port provided by the present invention, the bag body and the outer packaging film are integrally connected, and both ends of the easy-tear line have a second easy-tear opening.

[0013] The present invention also provides a manufacturing process for a packaging bag with a built-in suction port, comprising: S1, heat-sealing an inner film raw material according to a first set shape to obtain a heat-sealed inner film;

[0014] S2, punching the heat-sealed inner film to obtain an inner film strip;

[0015] S3, placing the two layers of inner film strips inside the outer film of the bag body, and performing a first transverse heat seal and a second transverse heat seal along a first direction, wherein the two layers of outer film and the two layers of inner film are sealed at the first transverse heat seal, and the outer film and the corresponding inner film are sealed at the second transverse heat seal, while preventing the two layers of inner film from being sealed together, to obtain a semi-finished product;

[0016] S4. Perform vertical sealing according to the set size to form a vertical sealing area. The outer film position corresponding to the vertical sealing area forms a first vertical sealing edge, and there is an empty sealing area between the first vertical sealing edge and the second vertical sealing edge on the same side;

[0017] S5. Cut at the vertical sealing position to obtain the finished product.

[0018] According to the present invention, a manufacturing process for a packaging bag with a built-in suction port includes, in step S1, the following steps:

[0019] When the bag type is three-side sealed or four-side sealed, fold the inner film material in half along the center line;

[0020] The first set shape is that the folded side is the large end and the other end is the small end; and the large end is a continuous heat-sealed area.

[0021] According to the present invention, a packaging bag with a built-in suction port is provided, wherein the step S1 includes:

[0022] When the bag type is a stand-up bag type, the inner film raw material is cut into two independent pieces in advance and overlapped;

[0023] The first setting state has a large head end and a small head end, and both the large head end and the small head end have an unblocked area.

[0024] According to the packaging bag with a built-in suction port provided by the present invention, the step S2 includes:

[0025] The punching position is closer to the large head end.

[0026] According to the present invention, a packaging bag with a built-in suction port is provided, wherein the step S3 includes:

[0027] The large end is close to the opening of the bag body; and an easy-tear line is provided along a first direction on the outer membrane of the bag body.

[0028] According to a manufacturing process for a packaging bag with a built-in suction port provided by the present invention, when the bag type is three-side sealed or four-side sealed, in the step S3, two layers of inner film strips are placed inside the bag body, including: cutting the outer film in the middle and folding it, and in the process of folding the two cut outer films, inserting the inner film strip into the bottom of the gap between the two outer films, and at the same time, the direction of the inner film is the same as that of the outer film.

[0029] According to a manufacturing process of a packaging bag with a built-in suction port provided by the present invention, when the bag type is a stand-up bag, in the step S3, two layers of inner film strips are placed inside the bag body, including:

[0030] The outer envelope is folded along its center line, and during the folding process, the inner envelope strip is inserted into the top of the gap between the two outer envelopes.

[0031] It can be seen from the above technical solutions that compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a packaging bag with a built-in inhalation port and a manufacturing process thereof, which has the following beneficial effects: by providing an easy-tear line on the outer film and simultaneously providing a first easy-tear opening below the sealed area of ​​the inner film, and leaving an empty sealed area between the inner edge of the first vertical seal and the outer edge of the second vertical seal, it is ensured that during the tearing process, the outer film is removed from the portion above the easy-tear line, and the inner film is removed from the portion above the first easy-tear opening. That is, after the user tears the easy-tear line by hand, the protective area of ​​the outer film is torn open, and the first easy-tear opening of the inner film is also torn open simultaneously. After tearing, a complete inhalation area of ​​the inner film is exposed, ensuring safe and hygienic inhalation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 This is a schematic diagram of the closed structure of the packaging bag with a built-in suction port provided by the present invention;

[0035] Figure 2 This is one of the structural schematic diagrams of the packaging bag with a built-in suction port provided by the present invention being opened;

[0036] Figure 3 This is the second schematic diagram of the closed structure of the packaging bag with a built-in suction port provided by the present invention;

[0037] Figure 4 This is the second structural schematic diagram of the opening of the packaging bag with a built-in suction port provided by the present invention;

[0038] Figure 5 This is a schematic diagram of the inner film process of a three-side sealed or four-side sealed bag provided by the present invention;

[0039] Figure 6 This is a schematic diagram of the inner film process of the stand-up bag type provided by the present invention;

[0040] Figure 7 Schematic diagram of the heat sealing process of a three-side sealed or four-side sealed bag provided by the present invention;

[0041] Figure 8 This is a schematic diagram of the heat sealing process of the stand-up pouch provided by the present invention;

[0042] Figure 9 This is a schematic diagram of the process of the inner packaging film entering the outer packaging film of the three-side sealed or four-side sealed bag provided by the present invention;

[0043] Figure 10 This is a schematic diagram of the process of the inner envelope of the stand-up bag type provided by the present invention entering the outer envelope;

[0044] Figure 11 This is one of the structural schematic diagrams of the inner envelope provided by the present invention as an independent membrane sheet and placed inside the bag body;

[0045] Figure 12 This is the second structural diagram of the inner envelope provided by the present invention as an independent membrane sheet and placed inside the bag body;

[0046] Figure 13 This is one of the structural schematic diagrams of the outer membrane provided by the present invention as an independent membrane sheet and placed on the outside of the bag body;

[0047] Figure 14 This is the second structural schematic diagram of the outer membrane provided by the present invention as an independent membrane sheet and placed on the outside of the bag body.

[0048] Among them, in the figure:

[0049] 1. Bag body; 2. Easy-tear line; 3. First vertical seal edge; 4. Second vertical seal edge; 5. First easy-tear notch; 6. Unsealed area; 7. Second easy-tear notch; 8. Partition; 10. Center line; 20. Heat-sealed area; 30. Punching; 40. First horizontal heat seal; 50. Second horizontal heat seal; 60. Unsealed area; 70. Vertical seal area; 80. Bottom seal; 100. Inner film; 200. Outer film; 300. Bag bottom. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] like Figure 1-4 As shown, an embodiment of the first aspect of the present invention is to provide a packaging bag with a built-in suction port, comprising a bag body, an outer film and an inner film, the bag body 1 having an opening; the outer film is arranged at the opening of the bag body 1, and the outer film has an easy-tear line 2 along a first direction, and both sides of the outer film have a first vertical sealing edge 3 along a second direction; the inner film is arranged on the inner side of the outer film, and both sides of the inner film have a second vertical sealing edge 4, and the top of the inner film is provided with a first easy-tear opening 5; there is an empty sealing area 6 between the second vertical sealing edge 4 and the first vertical sealing edge 3 on the same side, and the first easy-tear opening 5 is closer to the opening of the bag body 1 relative to the easy-tear line 2.

[0052] The first direction is the width of the bag, and the second direction is at an angle to the first direction, which is an acute angle or a right angle. The first vertical seal 3 is perpendicular to the tear line 2, and the second vertical seal 4 is inclined, forming an acute angle with the tear line 2.

[0053] By providing an easy-tear line 2 on the outer film and also providing a first easy-tear opening 5 below the sealing area of ​​the inner film, and leaving an empty sealing area 6 between the inner edge of the first vertical sealing edge 3 and the outer edge of the second vertical sealing edge 4, it is ensured that during the tearing process, the outer film removes the portion above the easy-tear line 2, and the inner film removes the portion above the first easy-tear opening 5. That is, after the user tears the easy-tear line 2 by hand, the protective area of ​​the outer film is torn open, and the first easy-tear opening 5 of the inner film is also torn open at the same time. After tearing, a complete area of ​​the inner film for inhalation is exposed. In this way, the packaging bag will not contaminate the inhalation area when it is torn by hand, ensuring safety and hygiene. In addition, the packaging bag is less expensive than the covered bag and is suitable for high-speed mass production.

[0054] In some feasible embodiments of the present invention, the bag type of the bag body 1 includes three-side seal, four-side seal or upright bag. Figure 1 and Figure 2 As shown in the figure, it is a schematic diagram of the structure of a three-side sealed or four-side sealed bag. Figure 3 and Figure 4 The figure shows the structure of the stand-up bag type.

[0055] In some feasible embodiments of the present invention, the bag body 1 and the outer packaging film are integrally connected, that is, the outer packaging film of the bag body itself is integrated.

[0056] The packaging bag with a built-in inhalation port provided by the present invention has a bag body, outer film, and inner film all made of flexible packaging materials, resulting in low cost. The flexible packaging materials can be polyethylene (PE), polypropylene (PP), or polyvinyl chloride (PVC), and can also be composite structures such as PE / aluminum foil / PE, which provide both barrier properties and flexibility.

[0057] like Figure 1 and Figure 3 As shown, the use process of the packaging bag with a built-in suction port provided by the present invention is as follows: the outer film is provided with a second easy-tear opening 7 on one side of the easy-tear line 2, and is torn starting from the second easy-tear opening 7, cracking along the easy-tear line 2 to the other side, passing through the first vertical sealing edge 3 to reach the empty sealing area 6, and continuing to crack to one side, while the lower side of the first easy-tear opening 5 of the inner film remains intact, and the tearing force is continuously applied, the inner film will crack at the first easy-tear opening 5, reach the first easy-tear opening 5 on the other side, and then the easy-tear line 2 of the outer film reaches the other end until it is completely broken, as shown in FIG. Figure 2 and Figure 4 shown.

[0058] Therefore, when the user tears the packaging bag with a built-in suction port provided by the present invention along the easy-tear line 2, due to the empty sealed area 6 flowing out between the inner edge line of the first vertical sealing edge 3 and the outer edge line of the second vertical sealing edge 4, during the tearing process, the outer packaging film can remove the part above the easy-tear line 2, and the inner packaging film removes the part above its first easy-tear opening 5. After tearing, a complete area of ​​the sucking part of the inner packaging film can be exposed, thereby achieving the hygienic and safe packaging requirements.

[0059] The second embodiment of the present invention is to provide a manufacturing process for a packaging bag with a built-in suction port. In the manufacturing process, two problems need to be solved: First, the sealing of the suction area of ​​the bag mouth has an area where the inner films are bonded to each other and cannot be bonded to the outer film. There is also an area where the inner film and the outer film are bonded, and at the same time the inner films cannot be bonded to each other. There are also areas where the inner film and the outer film, and the inner films and the inner films must be bonded at the same time. Only in this way can the bag design requirements be met. The inner film adopts a double-sided adhesive coating film, and the inner side of the outer film is a single-sided adhesive coating film. The process of using different steps to seal different positions can ultimately achieve different bag making requirements between "sticky and non-sticky" in different sealing areas.

[0060] Secondly, in order to simplify the process, the inner film must be able to withstand a certain tensile force. That is, there must be a certain width of film material connecting the inner films of each adjacent bag, and when the whole bag is connected, it enters the outer film through traction.

[0061] like Figure 5-Figure 8 As shown, the manufacturing process of the packaging bag with a built-in suction port provided by the present invention includes the following steps:

[0062] like Figure 5 and Figure 6 As shown, in step S1, the inner film raw material is heat-sealed according to a first set shape, with second vertical sealing edges 4 on both sides to obtain a heat-sealed inner film.

[0063] Step S2: punching the heat-sealed inner film to obtain inner film strips.

[0064] In the above steps, after punching, part of the membrane material is retained at the top and bottom to form a frame as a whole, which meets a certain membrane tension and will not produce large deformation under the traction force of forward transportation.

[0065] It should be noted that in order to increase the production speed, multiple bags are moved forward with each step. Figure 5 and Figure 6 As shown, it is an example of moving 4 bags forward at each step.

[0066] like Figure 7 and Figure 8 As shown, step S3, the two layers of inner film strips are placed inside the outer film of the bag body, and the first horizontal heat seal 40 and the second horizontal heat seal 50 are performed along the first direction. At the first horizontal heat seal 40, the two layers of outer film and the two layers of inner film are sealed. At the second horizontal heat seal, the outer film is sealed with the corresponding inner film, and the two layers of inner film finished product are avoided from being sealed. The positions of the first horizontal heat seal 40 and the second horizontal heat seal 50 are located on both sides of the inner film strip to obtain a semi-finished product.

[0067] In the above step S3, the first transverse heat seal 40 is a common sealing area of ​​the four layers of film, ensuring that each layer is fused together.

[0068] The second transverse heat seal 50 is heated forward and backward. To prevent the two inner film layers from sealing together, a partition 8 is inserted between the two inner film layers. On one side of the partition 8, the outer inner surface of the outer film is sealed to the outer outer surface of the inner film. On the other side of the partition 8, the inner inner surface of the outer film is sealed to the inner outer surface of the inner film. This sealing ensures that the package contents can pass through this channel to the ingestion area of ​​the inner film without leaking into the outer film.

[0069] S4. Seal the bag vertically according to its width to form a vertical sealing area 70. The position of the outer film corresponding to the vertical sealing area 70 forms a first vertical sealing edge 3, and there is an empty sealing area 6 between the first vertical sealing edge 3 and the second vertical sealing edge 4 on the same side.

[0070] In the above step S4, there are two layers of membrane and four layers of membrane coexisting in the vertical sealing area 70, which requires the heating block to seal softly first and then hard, then softly and then hard, and perform multiple sealing to ensure the sealing of the layer-changing filter area. At the same time, each layer of the four layers of membrane must be fused together where they are sealed.

[0071] S5, cutting is performed at the position of the first vertical sealing edge 3 to obtain a finished packaging bag.

[0072] Through the above step S5, multiple packaging bags can be produced at one time, thereby improving production efficiency.

[0073] The packaging bag manufactured by the above steps ensures that during the tearing process, the outer film is removed from the portion above the easy-tear line 2, and the inner film is removed from the portion above the first easy-tear opening 5. That is, after the user tears the easy-tear line 2 by hand, the protective area of ​​the outer film can be torn open while the first easy-tear opening 5 of the inner film is also torn open at the same time. After tearing, a complete area of ​​the inner film for smoking can be exposed, ensuring safety and hygiene.

[0074] like Figure 5 As shown, further, when the bag type is three-side sealed or four-side sealed, in step S1, it includes:

[0075] Fold the inner film material in half along the center line 10;

[0076] The first setting shape is that the folded side is the big end and the other end is the small end; and the big end is the continuous heat sealing area 20, and the sealing shape is as follows Figure 5 As shown, the sealing of the two layers of film after folding is guaranteed. It should be noted that this sealing process must be completed before entering the outer film.

[0077] like Figure 6 As shown, further, when the bag type is a stand-up bag type, in step S1, it includes:

[0078] The inner film raw material is cut into two independent pieces in advance and overlapped. In order to cut the material later, the upper and lower parts need to be connected.

[0079] The first setting state has a large head end and a small head end, and both the large head end and the small head end have an unsealed area 60 to enable material to be discharged from the bag opening.

[0080] See again Figure 5 and Figure 6 As shown, further, in step S2, the punching hole 30 is located closer to the large end, and the large end is close to the opening of the bag body, which can increase the size of the bag opening and make it more convenient for materials to enter and exit.

[0081] like Figure 7 and Figure 8 As shown, further, in step S3, a tear line 2 is provided on the bag body 1 along the first direction, which can facilitate the user to tear open the packaging bag.

[0082] like Figure 9As shown, further, when the bag type is three-side sealed or four-side sealed, in step S3, two layers of inner film strips are placed inside the bag body, including: cutting the outer film 200 in the center and folding it so that the two outer films 200 overlap, wherein, in the process of folding the two cut outer films 200, the inner film 100 strip is inserted into the bottom of the gap between the two outer films, and at the same time, the direction of the inner film 100 is the same as that of the outer film 200.

[0083] like Figure 10 As shown, further, when the bag type is a stand-up bag, two layers of inner film are placed inside the bag body, including: in the process of folding the outer film 200 along its center line, a long strip of inner film 100 is inserted into the top of the gap between the two outer films 200, and the bottom of the bag body 1 has a bag bottom 300 that can stand upright.

[0084] like Figure 11 and Figure 12 The figure shows a schematic diagram of the structure in which the inner membrane of the upright bag is used as an independent membrane sheet and is placed on the inner side of the bag body.

[0085] The manufacturing process of the packaging bag with a built-in suction port provided in the embodiment of the second aspect of the present invention will not contaminate the area where the mouth is sucked when the packaging bag is torn open by hand, and the packaging bag has a lower cost than the covered bag and is suitable for high-speed mass production.

[0086] In addition, the present invention also provides a packaging bag, wherein the inner film 100 and the bag body are integrated, and the outer film 200 is an independent film and is placed on the outside of the bag body 1, as shown in FIG. Figure 13 and Figure 14 The figure shows the structure of the stand-up bag.

[0087] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0088] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A packaging bag with a built-in suction port, characterized in that: It comprises a bag body (1) having an opening; An outer film is provided at the opening of the bag body; the outer film has an easy-tear line (2) along a first direction, and both sides of the outer film have first vertical sealing edges (3) along a second direction; wherein the first direction refers to the width direction of the bag body (1), and the second direction and the first direction have an angle, which is an acute angle or a right angle; The inner film is arranged on the inner side of the outer film, the two sides of the inner film are provided with second vertical sealing edges (4), and the top of the inner film is provided with a first easy-tear opening (5); There is an empty sealing area (6) between the second vertical sealing edge (4) and the first vertical sealing edge (3) on the same side, and the first easy-tear opening (5) is closer to the opening of the bag body (1) than the easy-tear line (2); The use process is as follows: the outer film is cracked at one side of the easy-tear line (2) along the easy-tear line (2) to the other side, passes through the first vertical sealing edge (3) to reach the empty sealing area (6), and continues to crack to one side. The lower side of the first easy-tear opening (5) of the inner film remains intact. The tearing force is continuously applied, and the inner film will crack at the first easy-tear opening (5) and reach the first easy-tear opening (5) on the other side. Then the easy-tear line (2) of the outer film reaches the other end and is completely broken.

2. The packaging bag with a built-in suction port according to claim 1, characterized in that: The bag type of the bag body (1) includes a three-side sealed bag, a four-side sealed bag or a stand-up bag.

3. The packaging bag with a built-in suction port according to claim 1, characterized in that: The bag body (1) and the outer film are integrally connected, and both ends of the easy-tear line (2) have a second easy-tear opening (7).

4. A process for manufacturing a packaging bag with a built-in suction port according to any one of claims 1 to 3, characterized in that: Including steps: S1, heat-sealing the inner film raw material according to a first set shape, with second vertical sealing edges on both sides, to obtain a heat-sealed inner film; S2, punching the heat-sealed inner film to obtain an inner film strip; S3, placing the two layers of inner film strips inside the outer film of the bag body, and performing a first transverse heat seal (40) and a second transverse heat seal (50) along a first direction, wherein the two layers of outer film and the two layers of inner film are sealed at the first transverse heat seal (40), and the outer film is sealed with the corresponding inner film at the second transverse heat seal (50), and the two layers of inner film are prevented from being sealed; Get semi-finished products; S4, vertical sealing is performed according to the set size to form a vertical sealing area (70), the outer film position corresponding to the vertical sealing area (70) forms a first vertical sealing edge (3), and there is an empty sealing area (6) between the first vertical sealing edge (3) and the second vertical sealing edge (4) on the same side; S5. Cut at the vertical sealing position to obtain the finished product.

5. The manufacturing process of the packaging bag with built-in suction port according to claim 4, characterized in that: In the step S1, it includes: When the bag type is three-side sealed or four-side sealed, the inner film material is folded in half along the center line (10); The first set shape is that the folded side is the large end and the other end is the small end; and the large end is a continuous heat-sealed area (20), and the large end is close to the opening of the bag body.

6. The manufacturing process of the packaging bag with built-in suction port according to claim 4, characterized in that: In step S1, it includes: When the bag type is a stand-up bag, the inner film material is cut into two independent pieces in advance and overlapped; The first set shape has a large head end and a small head end, and both the large head end and the small head end have an unsealed area (60), and the large head end is close to the opening of the bag body.

7. The manufacturing process of the packaging bag with built-in suction port according to claim 5 or 6, characterized in that: In step S2, it includes: The punching hole (30) is located closer to the large head end.

8. The manufacturing process of the packaging bag with built-in suction port according to claim 7, characterized in that: In step S3, it includes: An easy-tear line (2) is provided along a first direction on the outer envelope of the bag body.

9. The manufacturing process of the packaging bag with built-in suction port according to claim 7, characterized in that: When the bag type is three-side sealed or four-side sealed, in step S3, two layers of inner film strips are placed inside the outer film of the bag body, including: The outer packaging film (200) is cut in the middle and folded, and in the process of folding the two cut outer packaging films (200), the inner packaging film (100) strip is inserted into the bottom of the gap between the two outer packaging films (200), and the direction of the inner packaging film (100) is the same as that of the outer packaging film (200).

10. The manufacturing process of the packaging bag with built-in suction port according to claim 7, characterized in that: When the bag type is a stand-up bag, in step S3, two inner film strips are placed inside the outer film of the bag body, including: The outer envelope (200) is folded along its center line, and during the folding process, the inner envelope (100) strip is inserted into the top of the gap between the two outer envelopes (200).

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