Gasketed tabbed pouch and method of making

Abstract

The application relates to a gasket type pull ring bag and a preparation method, and relates to the technical field of packaging bags. The gasket type pull ring bag comprises a packaging bag, a sealable strip arranged in the packaging bag, the sealable strip separating the packaging bag into an essence cavity and a film cloth cavity, a through hole arranged on each of opposite sides of the packaging bag, a gasket arranged on each of inner sides of the packaging bag, the gasket closing the corresponding through hole, and a pull ring arranged on each of outer sides of the packaging bag, the pull ring being connected with the corresponding gasket. The gasket separates the pull ring from the packaging bag, reduces the possibility of the pull ring sticking to the packaging bag, and improves the convenience of consumers in using the pull ring to pull open the packaging bag.

Description

Technical Field

[0001] This application relates to the technical field of packaging bags, and in particular to a pad-type pull tab bag and its preparation method. Background Technology

[0002] Currently, most high-end face masks on the market use a dry-wet separation packaging method, that is, the essence and the mask sheet are packaged separately.

[0003] Dry and wet separation packaging bags on the market usually adopt extrusion mixing packaging bags. Specifically, extrusion mixing packaging bags mainly include an inner packaging bag, which is equipped with a sealing strip. The sealing strip divides the inner packaging bag into a first cavity for holding the mask sheet and a second cavity for holding the essence. The sealing strip includes a sealing section and an easy-open section.

[0004] Compression-mixing packaging bags typically involve squeezing the second chamber, causing the air inside to burst open the easy-open section. This allows the essence in the second chamber to enter the first chamber, where the mask sheet mixes with the essence. However, compression-mixing packaging bags are relatively difficult to use.

[0005] For this reason, existing dry-wet separation packaging bags use pull-tab packaging bags, which are made by adding pull tabs to the outside of the aforementioned extrusion mixing packaging bags. The essence and the mask sheet are mixed by pulling the pull tabs on both sides of the packaging bag.

[0006] In the existing production process of pull-tab packaging bags, pull-tabs need to be formed by cutting PET / PE film through a positioning die-cutting process. Then, the PET / PE film is compounded with other materials and processed through curing to form a packaging composite film for producing packaging bags. Finally, the two layers of packaging composite film are heat-sealed to produce pull-tab packaging bags.

[0007] This method requires cutting pull tabs into a PET / PE film first, and then laminating the PET / PE film with the pull tabs into other materials to prepare a packaging composite film. Therefore, during the lamination process, the pull tabs can easily stick to the other materials, resulting in the pull tabs ultimately adhering to the packaging bag. This makes it inconvenient for consumers to open the bag using the pull tabs. Summary of the Invention

[0008] This application provides a pad-type pull tab bag and its preparation method. The purpose is to ensure that the pull tab on the packaging bag does not directly contact the packaging bag, thereby reducing the possibility of the pull tab sticking to the packaging bag and improving the convenience for consumers to open the packaging bag using the pull tab.

[0009] Firstly, the gasket-type pull-tab bag provided in this application adopts the following technical solution: A pad-type pull-tab bag includes: a packaging bag, wherein an easily tearable sealing strip is provided inside the packaging bag, the sealing strip dividing the packaging bag into an essence chamber and a membrane cloth chamber; The packaging bag has clearance holes on both sides, and gaskets are provided on both inner sides of the packaging bag, with the gaskets sealing the corresponding clearance holes. The packaging bag has pull rings on both outer sides, and the pull rings are connected to the corresponding gaskets.

[0010] By adopting the above technical solution, firstly, an easy-to-tear sealing strip is set inside the packaging bag. Since the sealing strip divides the packaging bag into an independent essence chamber and a mask cloth chamber, the essence chamber is used to hold the essence liquid, while the mask cloth chamber is used to hold the mask cloth. Therefore, the requirement of dry and wet separation of the packaging bag can be achieved.

[0011] Secondly, there is a pull ring on each of the two opposite sides of the packaging bag, so the seal can be opened by pulling the pull ring to connect the essence chamber and the mask cloth chamber, making it convenient to use the mask.

[0012] A gasket is placed between the pull tab and the packaging bag. The gasket is connected to the packaging bag, and the pull tab is connected to the gasket. This separates the pull tab from the packaging bag. The gasket is heat-sealed to the packaging bag, and then the pull tab is heat-sealed to the gasket. This reduces the possibility of the pull tab sticking to the packaging bag during heat sealing. This design can improve the convenience for consumers to open the packaging bag using the pull tab.

[0013] Furthermore, because the gasket is located inside the packaging bag, and the packaging bag has a clearance hole through which the pull tab connects to the gasket, the bag cannot be sealed if the gasket is not properly connected to the packaging bag. This will be detected during subsequent production. A poorly connected gasket also reduces the tightness of the connection between the pull tab and the packaging bag. Therefore, this design ensures a tighter connection between the packaging bag and the pull tab at the factory, preventing the pull tab from detaching from the packaging bag when the consumer opens it, thus further improving the convenience for consumers to open the packaging bag using the pull tab.

[0014] Optionally, both of the gaskets are located within the essence cavity.

[0015] By adopting the above technical solution, this setting allows the pull tab to be located on one side of the essence cavity on the packaging bag, thus making it easy to open the sealing strip by pulling the pull tab.

[0016] Optionally, the packaging bag is formed by heat-sealing the edges of two layers of packaging composite film, and the sealing strip is formed by heat-sealing the middle of the two layers of packaging composite film.

[0017] By adopting the above technical solution, a packaging bag is prepared by heat-sealing the edges of the two-layer packaging composite film. The sealing strip is formed by heat-sealing the two-layer packaging composite film, which facilitates the rapid processing of the sealing strip inside the packaging bag.

[0018] Optionally, the sealing strip includes a sealing section and an easy-open section, wherein the sealing section is elongated and the easy-open section is wavy.

[0019] By adopting the above technical solution, the sealing section can achieve a complete seal between the essence chamber and the membrane chamber. The easy-open section features a wavy shape, which makes it easier to open the packaging bag due to the uneven force distribution between the crests and troughs. Therefore, the wavy design of the easy-open section facilitates the use of the packaging bag.

[0020] Optionally, the width of each part of the easy-to-unlock section along its own direction is the same.

[0021] By adopting the above technical solution, since the width of the easy-open section is uniform, sufficient sealing can be ensured at all points of the easy-open section under normal conditions. Then, when opening the packaging bag, all points of the easy-open section can be easily opened, allowing the entire easy-open section to open almost simultaneously, thereby allowing the essence to flow quickly into the membrane cavity.

[0022] Optionally, the width of the easy-open section is smaller than the width of the sealing section.

[0023] By adopting the above technical solution, because the width of the easy-open section is smaller than that of the sealing section, the easy-open section can be opened more quickly when the packaging bag is opened, realizing the connection between the membrane cavity and the essence cavity. Furthermore, when the easy-open section is difficult to tear, it can prevent consumers from using excessive force to tear the entire packaging bag.

[0024] Optionally, the packaging composite film has a multi-layer structure, and the layer corresponding to the gasket is a heat-sealing layer, which is heat-sealed to the gasket. The heat-sealing layer includes a polyethylene layer, a first composite layer, and a second composite layer, which are arranged sequentially along the pull ring towards the direction corresponding to the gasket. The polyethylene layer is made of polyethylene and has a multi-layer structure; the first composite layer is made of polyethylene and polyethylene-vinyl acrylate composite; the second composite layer is made of polyethylene and polyethylene-acrylic resin composite.

[0025] By adopting the above technical solution, a heat-sealing layer is provided for heat sealing with the gasket, as the inner side of the packaging composite film needs to be heat-sealed. Furthermore, the heat-sealing layer adopts a multi-layer structure. The polyethylene layer is made of polyethylene resin and has a multi-layer structure, which improves the strength of the heat-sealing layer. The first composite layer incorporates polyethylene-vinyl acrylate, which increases the adhesive strength of the heat-sealing layer. The second composite layer incorporates polyethylene-acrylic resin, which increases the ease of peeling the heat-sealing layer. Thus, the heat-sealing layer has better sealing performance while also being easy to peel.

[0026] Secondly, the method for preparing a gasket-type pull-tab bag provided in this application adopts the following technical solution: A method for preparing a gasket-type pull-tab bag, comprising the following steps: Prepare a packaging composite film, and perform positioning die-cutting on the packaging composite film to cut out clearance holes; A first composite film is prepared, and a positioning die-cutting process is performed on the first composite film to prepare a gasket; A second composite film is prepared, and a positioning die-cutting process is performed on the second composite film to prepare a pull ring; Place the gasket on one side of the packaging composite film, connect the gasket to the packaging composite film, and seal the corresponding clearance hole with the gasket; Place the pull tab on the side of the packaging composite film away from the gasket and connect the pull tab to the gasket; Two layers of packaging composite film, connected by a pull ring and a gasket, are fed into a bag-making machine and heat-sealed at the edges to produce a packaging bag; the packaging bag has a pre-sealed opening; A sealing strip is processed inside the packaging bag to prepare a gasket-type pull-tab bag; the sealing strip divides the packaging bag into an essence chamber and a mask cloth chamber, and the sealing strip also divides the back seal into an essence port for injecting essence into the essence chamber and a mask cloth port for inserting the mask cloth into the mask cloth chamber.

[0027] By adopting the above technical solution, the above-mentioned gasket-type pull-tab bag can be produced through this preparation method.

[0028] Optionally, the heat sealing temperature range for heat sealing processing in the preparation method is 123℃~185℃.

[0029] By adopting the above technical solution, when the packaging bag is heat-sealed, the heat-sealing strength remains stable within the range of 123℃ to 185℃. Furthermore, the packaging bag exhibits both good sealing performance and good ease of opening.

[0030] Optionally, the preparation of the packaging composite film includes the following steps: A printing ink layer is prepared by printing on a printing base film; A semi-finished composite film is prepared by processing the PET printing layer, the printing ink layer, the first adhesive layer, and the barrier layer through a dry lamination process. The semi-finished composite film, the second adhesive layer, and the heat-sealing layer are combined and cured to prepare a packaging composite film.

[0031] By adopting the above technical solutions, packaging composite films with specific patterns and functions can be produced through printing and dry lamination processes, thereby improving the appearance and performance of products. The lamination and curing processes ensure a tight bond between the layers, enhancing the overall quality and durability of the packaging bags.

[0032] In summary, this application includes at least one of the following beneficial technical effects: 1. This application separates the pull tab from the packaging bag by using a gasket, which can reduce the possibility of the pull tab sticking to the packaging bag and improve the convenience for consumers to open the packaging bag using the pull tab.

[0033] 2. This application uses a gasket to seal the clearance hole on the packaging bag, so that the packaging bag and the gasket are tightly connected when leaving the factory, thereby improving the tightness of the connection between the packaging bag and the pull tab. When the consumer opens the packaging bag, it can prevent the pull tab from coming off the packaging bag, thus further improving the convenience for consumers to open the packaging bag using the pull tab.

[0034] 3. This application improves the performance of the heat-sealing layer by designing the layer structure of the heat-sealing layer, so that the packaging bag has both good sealing performance and good ease of opening.

[0035] 4. This application designs the easy-open section in a wave shape, allowing consumers to open the packaging bag with less force. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the gasket-type pull-tab bag according to Embodiment 1 of this application.

[0037] Figure 2 This is an exploded structural diagram of a packaging composite film with a gasket and a pull ring connected in Embodiment 1 of this application.

[0038] Figure 3 This is a schematic diagram of the layer structure of the packaging composite film of Embodiment 1 of this application.

[0039] Figure 4 This is a schematic diagram of the overall structure of the gasket-type pull-tab bag according to Embodiment 2 of this application.

[0040] In the diagram, 1. Packaging bag; 11. Essence chamber; 12. Membrane fabric chamber; 13. Relief hole; 14. Packaging composite film; 141. Printed PET layer; 142. Printed ink layer; 143. First adhesive layer; 144. Barrier layer; 145. Second adhesive layer; 146. Heat-sealing layer; 15. Rear seal; 151. Essence opening; 152. Membrane fabric opening; 2. Sealing strip; 21. Sealing section; 22. Easy-open section; 3. Gasket; 31. First composite film; 4. Pull ring; 41. Second composite film. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 -Appendix Figure 4 This application will be described in further detail below.

[0042] Example 1: A type of padded pull tab bag, as shown in the reference Figure 1 and Figure 4 The packaging bag 1 is formed by heat sealing the edges of two layers of packaging composite film 14, and the packaging bag 1 has a pre-reserved rear seal 15. The rear seal 15 is used to fill the packaging bag 1 with the mask sheet and essence. After the mask sheet and essence are filled, the rear seal 15 is sealed by heat sealing.

[0043] Reference Figure 1 and Figure 2 The packaging bag 1 is equipped with a sealing strip 2, which divides the packaging bag 1 into an essence chamber 11 and a mask cloth chamber 12. The essence chamber 11 is used to hold the essence, while the mask cloth chamber 12 is used to hold the mask cloth, which enables a dry and wet separation packaging method.

[0044] Furthermore, referring to Figure 1 The sealing strip 2 divides the rear seal 15 into an essence port 151 and a mask cloth port 152. The essence port 151 is connected to the essence cavity 11, enabling the injection of essence into the essence cavity 11; the mask cloth port 152 is connected to the mask cloth cavity 12, enabling the insertion of the mask cloth into the mask cloth cavity 12.

[0045] In this embodiment, heat sealing is performed in the middle of the two-layer packaging composite film 14, so that the middle of the two-layer packaging composite film 14 is adhered, thereby forming a sealing strip 2.

[0046] Reference Figure 1 The sealing strip 2 includes a sealing section 21 and an easy-open section 22. One end of the sealing section 21 is connected to the easy-open section 22 along its length. The sealing section 21 completely separates the essence cavity 11 and the mask cloth cavity 12, so the essence cavity 11 and the mask cloth cavity 12 cannot be connected through the sealing section 21. However, under the action of external force, the two layers of packaging composite film 14 of the easy-open section 22 can be easily separated, thereby allowing the essence cavity 11 and the mask cloth cavity 12 to connect through the easy-open section 22, making the mask usable.

[0047] Reference Figure 1 The sealing section 21 is elongated. The easy-open section 22 is manufactured using a corrugated sealing process, resulting in a corrugated shape, and the width of all parts of the easy-open section 22 is the same along its own direction. The width of the easy-open section 22 is smaller than the width of the sealing section 21. Therefore, the shape and structure of the easy-open section 22 facilitates opening and thus makes it convenient for consumers to use.

[0048] Furthermore, referring to Figure 1 The sealing section 21 is located on the side of the easy-open section 22 that is closer to and further away from the rear seal 15. Therefore, since the easy-open section 22 is close to the bottom of the packaging bag 1, when the easy-open section 22 is torn open, the essence can flow into the membrane cavity 12 as much as possible, which can reduce the residue of the essence.

[0049] In addition to using heat sealing to prepare the sealing strip 2, the sealing strip 2 can also be made of an easy-to-tear adhesive strip, that is, the adhesive strip is placed between two layers of packaging composite film 14, and the opposite sides of the adhesive strip are respectively adhered to the corresponding packaging composite film 14 or heat-sealed by heat sealing process.

[0050] Reference Figure 1 and Figure 2 The packaging composite film 14 has a through-hole 13. A gasket 3 is provided on the side of each of the two packaging composite films 14 that is close to each other. The gasket 3 is heat-sealed to the corresponding packaging composite film 14 and closes the corresponding through-hole 13. A pull ring 4 is provided on the side of each of the two packaging composite films 14 that is far apart from each other. The connecting end of the pull ring 4 passes through the corresponding through-hole 13 and is heat-sealed to the corresponding gasket 3. Specifically, there is at least one heat-sealed connection point between the pull ring 4 and the corresponding gasket 3. Therefore, a pull ring 4 is provided on both sides of the packaging bag 1, making it convenient for consumers to open the easy-open section 22 of the sealing strip 2, thus facilitating consumer use.

[0051] Furthermore, referring to Figure 1 Both gaskets 3 are located inside the essence chamber 11, and the gaskets 3 are located on one side of the easy-open section 22 along the width direction of the sealing section 21. At this time, the pull ring 4 is closer to the gaskets 3, making it easier to open the easy-open section 22, which also makes it easier for consumers to use the packaging bag 1.

[0052] Reference Figure 2 and 3 The packaging composite film 14 includes, from the outside to the inside, a printed PET layer 141, a printed ink layer 142, a first adhesive layer 143, a barrier layer 144, a second adhesive layer 145, and a heat-sealing layer 146. The heat-sealing layer 146 is used for heat-sealing with the corresponding gasket 3.

[0053] The printing ink layer 142 is made of PET or PA material. Specifically, a printing base film is prepared from PET or PA material, and then printing is performed on the printing base film through a printing process to prepare the printing ink layer 142. The barrier layer 144 is made of high-barrier PET film, aluminum foil, aluminized film, or alumina coating.

[0054] The heat-sealing layer 146 includes a polyethylene layer, a first composite layer, and a second composite layer, which are arranged sequentially along the pull ring 4 toward the corresponding gasket 3.

[0055] The polyethylene layer is made of polyethylene and has a multi-layer structure. In this embodiment, the polyethylene layer is made of three layers of polyethylene composite. The presence of the polyethylene layer gives the heat-sealing layer 146 good mechanical properties, effectively resisting external pressure and impact. The first composite layer is prepared using polyethylene and polyethylene-vinyl acrylate. By weight, the first composite layer comprises the following parts of raw materials: 1 part polyethylene and 1 part polyethylene-vinyl acrylate. The introduction of polyethylene-vinyl acrylate into the first composite layer effectively improves the heat-sealing performance of the heat-sealing layer 146. Specifically, the introduction of polyethylene-vinyl acrylate increases the adhesive strength and heat-sealing strength of the heat-sealing layer 146, thereby improving the sealing performance of the packaging bag 1 during the bag-making process.

[0056] The second composite layer is made of polyethylene and polyethylene-acrylic resin. By weight, the second composite layer comprises the following parts of raw materials: 1 part polyethylene and 4 parts polyethylene-acrylic resin. The introduction of polyethylene-acrylic resin into the second composite layer makes the heat-sealing layer 146 easy to peel, facilitating the opening of the easy-peel section 22 of the sealing strip 2. Therefore, by adjusting the ratio of polyethylene to polyethylene-acrylic resin, the packaging bag 1 can be easily opened under specific conditions, providing a convenient opening experience. Simultaneously, the polyethylene and polyethylene-acrylic resin in the fifth layer give the packaging composite film 14 good thermal and chemical stability, making the packaging bag 1 less prone to deformation and chemical reactions during use.

[0057] In this embodiment, the heat-sealing layer 146 is prepared using a five-layer co-based blown film process. Furthermore, the thickness of the heat-sealing layer 146 is 40–120 μm.

[0058] When heat sealing is performed using the aforementioned heat-sealing layer 146, the heat sealing temperature is between 123℃ and 185℃, and the heat sealing strength of the packaging bag 1 remains stable. At this temperature, the packaging bag 1 has good sealing performance, and at the same time, the packaging bag 1 also has good ease of opening.

[0059] Reference Figure 2The gasket 3 is prepared from the first composite film 31 through a positioning die-cutting process, and the diameter of the cut gasket 3 is larger than the diameter of the clearance hole 13 on the packaging composite film 14. The first composite film 31 includes a PE layer, an adhesive layer, and a PET layer arranged sequentially along its thickness direction. When the gasket 3 is heat-sealed with the corresponding packaging composite film 14, the PE layer of the first composite film 31 is adhered to and heat-sealed with the heat-sealing layer 146 of the corresponding packaging composite film 14. The PET layers of the two gaskets 3 are positioned facing each other.

[0060] Reference Figure 2 The pull ring 4 is prepared from the second composite film 41 by a positioning die-cutting process. The second composite film 41 includes a PE layer, an adhesive layer, and a PET layer sequentially disposed along its thickness direction. When the pull ring 4 is heat-sealed with the corresponding gasket 3, the PE layer of the second composite film 41 is bonded to the PE layer of the corresponding first composite film 31 by the heat-sealing process.

[0061] The implementation principle of this application embodiment is as follows: the first composite film 31, the second composite film 41, and the packaging composite film 14 can all be produced independently. The first composite film 31 is used to prepare a gasket 3 through a positioning die-cutting process, and the second composite film 41 is used to prepare a pull ring 4 through a positioning die-cutting process. Then, the gasket 3 and the packaging composite film 14 are heat-sealed, and the gasket 3 and the pull ring 4 are heat-sealed. Finally, the two layers of packaging composite film 14 with the pull ring 4 and the gasket 3 are heat-sealed to prepare a packaging bag 1 with a pull ring 4.

[0062] Since the gasket 3, pull tab 4, and packaging composite film 14 are all produced independently and then assembled, the entire processing can be easily automated. The pull tab 4 is connected to the packaging composite film 14 via the gasket 3, reducing the possibility of the pull tab 4 sticking to the packaging bag 1, thus making it easier for consumers to use the pull tab 4.

[0063] This embodiment also discloses a method for preparing a gasket-type pull-tab bag, which includes the following steps: Step 1: Prepare packaging composite film 14.

[0064] The packaging composite film 14 is prepared by printing, laminating, curing, and slitting the PET printing layer 141, the printing ink layer 142, the first adhesive layer 143, the barrier layer 144, the second adhesive layer 145, and the heat-sealing layer 146.

[0065] Specifically, the first step is to perform printing processing on the printing base film to prepare the printing ink layer 142.

[0066] The second step involves processing the printed PET layer 141, the printed ink layer 142, the first adhesive layer 143, and the barrier layer 144 using a dry lamination process to prepare a semi-finished composite film.

[0067] The third step involves compounding and curing the semi-finished composite film, the second adhesive layer 145, and the heat-sealing layer 146 to prepare the packaging composite film 14.

[0068] The packaging composite film 14 is processed by a positioning die-cutting process to cut out the clearance hole 13.

[0069] Step 2: Prepare gasket 3.

[0070] The PE layer, adhesive layer and PET layer are compounded, cured and cut to prepare the first composite film 31.

[0071] The first composite film 31 is processed by a positioning die-cutting process to cut out a gasket 3 from the first composite film 31, and the diameter of the gasket 3 is larger than the diameter of the relief hole 13.

[0072] Step 3: Prepare pull ring 4.

[0073] The PE layer, adhesive layer and PET layer are compounded, cured and cut to prepare the second composite film 41.

[0074] Pull rings 4 are cut out from the first composite film 31 by a positioning die-cutting process.

[0075] Specifically, a tangent, window, or other die-cutting process is performed at a designated position on the first composite film 31 so that the cut portion on the first composite film 31 has a handle function, thereby producing a pull ring.

[0076] Steps one, two, and three above can be performed simultaneously, and there is no requirement for the order in which they are performed.

[0077] Step 4: Prepare the finished composite membrane.

[0078] The gasket 3 is connected to the packaging composite film 14, and the gasket 3 seals the corresponding clearance hole 13. Specifically, the PE layer of the gasket 3 is bonded to the heat-sealing layer 146 of the packaging composite film 14, and the gasket 3 seals the clearance hole 13, and then the PE layer of the gasket 3 is heat-sealed to the heat-sealing layer 146 of the packaging composite film 14.

[0079] The connecting end of the gasket 3 is passed through the corresponding clearance hole 13 and connected to the corresponding pull ring 4. Specifically, the pull ring 4 is placed on the side of the packaging composite film 14 away from the gasket 3, and the PE layer of the pull ring 4 is positioned directly opposite the PE layer of the gasket 3. Then, the PE layers of the pull ring 4 and the PE layers of the gasket 3 are heat-sealed and bonded along the axial direction of the clearance hole 13. There is no less than one heat-sealed connection point between the pull ring 4 and the gasket 3.

[0080] The heat-sealed packaging composite film 14, which has a gasket 3 and a pull ring 4, is a finished composite film.

[0081] Step 5: Prepare the pad-type pull-tab bag.

[0082] Two rolls of the finished composite film material prepared in step four above are placed in the double-feed bag making machine to make bags.

[0083] The edges of the two-layer composite film are heat-sealed to prepare packaging bag 1. However, one side of packaging bag 1 is not heat-sealed, leaving a back seal 15 for filling with essence and face mask. The back seal 15 is then heat-sealed after the essence and face mask are filled in.

[0084] A heat-sealing process is performed in the middle of the packaging bag 1 to form a sealing strip 2 inside the packaging bag 1, thus preparing a gasket-type pull-tab bag. The sealing strip 2 divides the gasket-type pull-tab bag into an essence chamber 11 and a membrane fabric chamber 12, and also divides the rear seal 15 into an essence opening 151 and a membrane fabric opening 152. Specifically, during the heat-sealing process of the sealing strip 2, the sealing section 21 uses a high-strength heat-sealing process to ensure the airtightness of the sealing section 21, while the easy-open section 22 uses a low-strength corrugated sealing process to make the easy-open section 22 easy to open.

[0085] Preferably, the heat sealing temperature range of the heat sealing process in the above steps is 123℃~185℃.

[0086] The implementation principle of this application embodiment is as follows: By adopting the above method, the gasket 3, pull ring 4, and packaging composite film 14 are all produced independently, thus improving the production speed and automation level of the gasket 3, pull ring 4, and packaging composite film 14. Then, the gasket 3, pull ring 4, and packaging composite film 14 are heat-sealed to prepare the finished composite film. This process only requires accurate positioning and heat-sealing between the gasket 3, pull ring 4, and packaging composite film 14, facilitating fully automated operation. Finally, the two layers of finished composite film are fed into a bag-making machine for bag production. Therefore, the production process of the pull ring 4 packaging bag 1 is easily automated, thereby reducing production costs and increasing production speed.

[0087] Example 2: A gasket-type pull-tab bag, the difference between this embodiment and embodiment 1 is that: the sealing strip 2 includes an easy-open section 22 and two sealing sections 21, and the easy-open section 22 is located between the two sealing sections 21.

[0088] The implementation principle of this application embodiment is as follows: it improves the stability of the connection between the easy-open section 22 of the sealing strip 2 and the packaging bag 1, so that the sealing strip 2 can better maintain its shape and integrity when subjected to external pressure or tension, thereby effectively separating the essence cavity 11 and the membrane cavity 12, and reducing the risk of the easy-open section 22 being opened by a small force.

[0089] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for preparing a gasket-type pull-tab bag, characterized in that, include: The pad-type pull-tab bag includes: The packaging bag (1) is formed by heat sealing the edges of two layers of packaging composite film (14). The packaging bag (1) is provided with an easy-to-tear sealing strip (2). The sealing strip (2) is formed by heat sealing the middle of the two layers of packaging composite film (14). The sealing strip (2) divides the packaging bag (1) into an essence cavity (11) and a membrane cloth cavity (12). The packaging bag (1) has clearance holes (13) through both sides, and the packaging bag (1) has gaskets (3) on both inner sides, and the gaskets (3) close the corresponding clearance holes (13). The packaging bag (1) is provided with pull rings (4) on both outer sides, and the pull rings (4) are connected to the corresponding gaskets (3); The preparation method includes the following steps: Prepare a packaging composite film (14) and perform positioning die-cutting on the packaging composite film (14) to cut out clearance holes (13). A first composite film (31) is prepared, and a positioning die-cutting process is performed on the first composite film (31) to prepare a gasket (3). A second composite film (41) is prepared, and a positioning die-cutting process is performed on the second composite film (41) to prepare a pull ring (4). Place the gasket (3) on one side of the packaging composite film (14), connect the gasket (3) to the packaging composite film (14), and seal the corresponding clearance hole (13) with the gasket (3). Place the pull ring (4) on the side of the packaging composite film (14) away from the gasket (3) and connect the pull ring (4) to the gasket (3); Two layers of packaging composite film (14) with pull ring (4) and gasket (3) connected are fed into the bag making machine and the edges are heat sealed to produce packaging bag (1); the packaging bag (1) has a back seal (15). A sealing strip (2) is processed inside the packaging bag (1) to prepare a gasket-type pull-ring bag; the sealing strip (2) divides the packaging bag (1) into an essence cavity (11) and a membrane cloth cavity (12), and the sealing strip (2) divides the back seal (15) into an essence port (151) for injecting essence into the essence cavity (11) and a membrane cloth port (152) for inserting the mask cloth into the membrane cloth cavity (12).

2. The method for preparing a gasket-type pull-tab bag according to claim 1, characterized in that, Both of the gaskets (3) are located within the essence cavity (11).

3. The method for preparing a gasket-type pull-tab bag according to claim 1, characterized in that, The sealing strip (2) includes a sealing section (21) and an easy-open section (22). The sealing section (21) is long and narrow, and the easy-open section (22) is wavy.

4. The method for preparing a gasket-type pull-tab bag according to claim 3, characterized in that, The width of each part of the easily removable section (22) along its own direction is the same.

5. The method for preparing a gasket-type pull-tab bag according to claim 3, characterized in that, The width of the easy-open section (22) is smaller than the width of the sealing section (21).

6. The method for preparing a gasket-type pull-tab bag according to claim 1, characterized in that, The packaging composite film (14) has a multi-layer structure, and the layer that is attached to the corresponding gasket (3) is a heat-sealing layer (146), and the heat-sealing layer (146) is heat-sealed to the gasket (3); The heat-sealing layer (146) includes a polyethylene layer, a first composite layer and a second composite layer, which are arranged sequentially along the pull ring (4) in the direction corresponding to the gasket (3); The polyethylene layer is made of polyethylene and has a multi-layer structure; the first composite layer is made of polyethylene and polyethylene-vinyl acrylate composite; the second composite layer is made of polyethylene and polyethylene-acrylic resin composite.

7. The method for preparing a gasket-type pull-tab bag according to claim 1, characterized in that, The heat sealing temperature range for the heat sealing process in the preparation method is 123℃~185℃.

8. The method for preparing a gasket-type pull-tab bag according to claim 7, characterized in that, The preparation of the packaging composite film (14) includes the following steps: A printing ink layer (142) is prepared by printing on a printing base film. A semi-finished composite film is prepared by dry lamination of the PET (141) printing layer, the printing ink layer (142), the first adhesive layer (143) and the barrier layer (144); The semi-finished composite film, the second adhesive layer (145) and the heat-sealing layer (146) are compounded and cured to prepare the packaging composite film (14).

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