Moisture-proof food packaging bag composite film and production equipment thereof

Abstract

The application discloses a kind of damp-proof food packaging bag composite film and production equipment thereof, a kind of damp-proof food packaging bag composite film, including base layer, damp-proof composite layer.Damp-proof composite layer is located in the side of base layer, damp-proof composite layer includes damp-proof layer, the side of damp-proof layer away from base layer is equipped with aluminium foil layer, aluminium foil layer and damp-proof layer between are equipped with protective layer, base layer, damp-proof layer, aluminium foil layer and protective layer are all connected with connecting glue layer.A kind of damp-proof food packaging bag composite film production equipment, including hot-pressing treatment box, hot-pressing mechanism, adsorption purification mechanism.Hot-pressing treatment box is connected with hot-pressing isolation frame.The damp-proof protection performance of food packaging bag composite film is significantly improved by the setting of corresponding mechanism, the use effect of food packaging bag composite film is improved, and the harmful gas generated in the hot-pressing process of food packaging bag composite film can be adsorbed and purified, the energy saving and environmental protection in the hot-pressing production process of food packaging bag composite film is improved.

Description

Technical Field

[0001] This invention relates to a composite film for food packaging bags, and more particularly to a moisture-proof composite film for food packaging bags and its production equipment. Background Technology

[0002] Food packaging composite film is a type of composite roll film used for packaging food in daily life. It is mainly used to isolate and decompose microorganisms and bacteria and prevent the entry of foreign contaminants, thereby extending the shelf life of food. It is widely used in the packaging of various foods.

[0003] Most common food packaging bag composite films are made of polyethylene film, polyvinyl chloride film and other film layers. In use, food packaging bag composite films are usually made into food packaging bags to seal and protect food.

[0004] The existing composite films for food packaging bags have a relatively simple layer structure and functionality, which cannot meet the moisture-proof requirements in the food packaging process. This results in poor moisture protection during food packaging and a poor overall performance. Furthermore, the production and processing of food packaging composite films requires the use of high-pressure and high-temperature hot-pressing equipment for bonding. Since food packaging composite films consist of multiple layers of film and adhesive layers, they are prone to releasing harmful gases under high pressure and high temperature. Most hot-pressing equipment lacks gas purification capabilities, thus making the production and processing of food packaging composite films environmentally unfriendly. Summary of the Invention

[0005] The purpose of this invention is to provide a moisture-proof food packaging bag composite film and its production equipment, which can improve the moisture-proof performance of the food packaging bag composite film.

[0006] To achieve the above objectives, the present invention provides a moisture-proof food packaging bag composite film, comprising a base layer and a moisture-proof composite layer.

[0007] The moisture-proof composite layer is disposed on one side of the substrate layer. The moisture-proof composite layer includes a moisture-proof layer. An aluminum foil layer is disposed on the side of the moisture-proof layer away from the substrate layer. A protective layer is disposed between the aluminum foil layer and the moisture-proof layer. A connecting adhesive layer is connected between the substrate layer, the moisture-proof layer, the aluminum foil layer and the protective layer.

[0008] In one or more embodiments, a waterproof layer is provided on the side of the substrate layer away from the moisture-proof layer. The waterproof layer improves the waterproof performance of the substrate layer, thereby enhancing its moisture-proof performance during food packaging. A second adhesive layer connects the waterproof layer and the substrate layer. This second adhesive layer serves to connect and fix the waterproof layer and the substrate layer.

[0009] In one or more embodiments, the thickness of the multilayer connecting adhesive layer and the second adhesive layer is the same. This facilitates the simultaneous bonding and curing of the substrate layer, moisture-proof layer, aluminum foil layer, protective layer, and waterproof layer via hot pressing. The protective layer is made of porous silica, which improves its moisture-proof performance.

[0010] In one or more embodiments, a production equipment for a moisture-proof food packaging bag composite film includes: a hot pressing treatment box, a hot pressing isolation frame, a hot pressing treatment mechanism, and an adsorption purification mechanism.

[0011] The hot-pressing chamber is equipped with a hot-pressing isolation frame. This frame divides the space within the chamber and provides space for the hot-pressing mechanism. The isolation frame, in conjunction with the chamber, forms a gas purification chamber, a hot-pressing control chamber, and a drive control chamber. These chambers facilitate the separation of the hot-pressing, driving, and gas purification processes for the composite membrane, improving the energy efficiency and environmental friendliness of the hot-pressing process.

[0012] The hot-pressing mechanism is located within the hot-pressing control chamber. This facilitates the hot-pressing curing of the composite film within the hot-pressing isolation frame. The hot-pressing mechanism includes a pair of fixed driving members. These members support, fix, and control the movement of the thermally conductive curing blocks, thus enabling the hot-pressing curing of the composite film by controlling the operation of the fixed driving members. A thermally conductive curing block is connected to the side of each pair of fixed driving members that is in close proximity. The thermally conductive curing block performs hot-pressing curing of the composite film between the pair of fixed driving members. Multiple sets of heating resistance wires are connected to the thermally conductive curing block. The operation of these heating resistance wires controls the heating of the thermally conductive curing block. A pair of lifting screws are threaded to both sides of each fixed driving member, and these lifting screws pass through the pair of fixed driving members. This allows the lifting screws to support, limit, and control the movement of the fixed driving members.

[0013] The adsorption purification mechanism is located within the gas purification chamber. This facilitates the adsorption and purification of harmful gases generated during the hot pressing process of the composite membrane, improving the energy efficiency and environmental friendliness of the composite membrane production process. The adsorption purification mechanism includes an adsorption purification box, which provides adsorption and purification space for harmful gases. Gas delivery pipes are connected to both sides of the adsorption purification box. These gas delivery pipes connect the adsorption purification box to the gas collection pipe, facilitating the transport of harmful gases within the gas collection pipe. The end of the gas delivery pipe furthest from the adsorption purification box is connected to a gas collection pipe, which is connected to the hot pressing control chamber. The gas collection pipe guides and transports the harmful gases within the hot pressing control chamber.

[0014] In one or more embodiments, a composite film tensioning conveyor roller is provided on one side of the hot pressing chamber, and a composite film conveying roller is provided on the side of the hot pressing chamber away from the composite film tensioning conveyor roller. This facilitates the supporting and conveying of the composite film through the cooperation of the composite film tensioning conveyor roller and the composite film conveying roller, improving the convenience of processing the composite film.

[0015] In one or more embodiments, each of the plurality of lifting screws has a drive pulley connected to one end within the drive control cavity. This facilitates rotational control of the lifting screws by driving the drive pulleys, thereby allowing a pair of fixed drive components to move with the rotation of the lifting screws under the action of internal and external threads. This facilitates the hot-pressing treatment of the composite film.

[0016] A transmission belt is fitted around the outer side of the drive pulley. The transmission belt connects the drive pulley and the grooved pulley, facilitating synchronous rotation of the drive pulley and the grooved pulley under the action of the transmission belt. A grooved pulley is connected to the side of the transmission belt away from the drive pulley. The grooved pulley transmits power to the pressing motor. The pressing motor is connected to the grooved pulley, allowing for rotational control of the grooved pulley by controlling the operation of the pressing motor.

[0017] In one or more embodiments, a negative pressure fan is provided between the gas delivery pipe and the adsorption purification box. This allows for the generation of negative pressure by controlling the operation of the fan, thereby facilitating the adsorption of harmful gases within the thermostatic control chamber by the gas delivery pipe and the gas collecting pipe. The adsorption purification box contains a pair of adsorption purification screens. These screens adsorb and purify the harmful gases within the box. Filter frames are provided on opposite sides of each pair of adsorption purification screens. These filter frames provide support and fixation for the dust adsorption screens.

[0018] In one or more embodiments, movable guide blocks are fixedly connected to both sides of the filter frame, and movable grooves matching the movable guide blocks are formed on the inner wall of the adsorption purification box. The movable guide blocks and movable grooves work together to guide the movement of the filter frame. A sliding rod is provided within the movable groove. The sliding rod supports, limits, and guides the movable guide blocks. A return spring is sleeved on the outer side of the sliding rod. The return spring's contraction and retraction provide support and reset for the filter frame. A shrink film is connected to the outer side of the movable groove. The shrink film provides a sealing control for the movable groove.

[0019] In one or more embodiments, a dust adsorption mesh is connected inside the filter frame. The dust adsorption mesh filters and purifies harmful gases transported through the gas delivery pipe. Multiple evenly distributed cleaning nozzles are connected to the inner wall of the filter frame, and these nozzles are matched to the dust adsorption mesh. The multiple cleaning nozzles output gas to backflush the dust adsorption mesh, achieving a purification effect. An air guide groove is formed inside the filter frame, and this groove is connected to a movable slide groove. This facilitates the transport of gas from the movable slide groove to the cleaning nozzles during the movement of the movable guide block.

[0020] In one or more embodiments, a limiting shaft is provided between a pair of adsorption purification nets. The limiting shaft is rotatably connected to the adsorption purification box and supports and limits the multiple centrifugal purification nets. Multiple evenly distributed centrifugal purification nets are fixedly connected to the outer side of the limiting shaft. This facilitates multi-angle adsorption and purification of the gas inside the adsorption purification box through multiple centrifugal purification nets. An exhaust pipe is connected to the substrate layer, and the exhaust pipe is matched with the centrifugal purification nets. The purified gas inside the adsorption purification box is discharged through the exhaust pipe.

[0021] Compared with the prior art, the present invention significantly improves the moisture-proof protection performance of food packaging bag composite film through the setting of corresponding mechanisms, and improves the use effect of food packaging bag composite film. At the same time, it can adsorb and purify harmful gases generated during the hot pressing process of food packaging bag composite film, and improve the energy saving and environmental protection of food packaging bag composite film hot pressing production process. Attached Figure Description

[0022] Figure 1 This is a perspective view of a moisture-proof food packaging bag composite film according to one embodiment of the present invention.

[0023] Figure 2 This is a side view of a moisture-proof food packaging bag composite film according to an embodiment of the present invention.

[0024] Figure 3 yes Figure 2 Schematic diagram of the structure at point A in the middle.

[0025] Figure 4 This is a front sectional view of the production equipment for the moisture-proof food packaging bag composite film according to one embodiment of the present invention.

[0026] Figure 5 yes Figure 4 Schematic diagram of the structure at point B.

[0027] Figure 6 yes Figure 4 Schematic diagram of the structure at point C.

[0028] Figure 7This is a top sectional view of the production equipment for moisture-proof food packaging bag composite film according to one embodiment of the present invention.

[0029] Figure 8 This is a side sectional view of the production equipment for the moisture-proof food packaging bag composite film according to one embodiment of the present invention.

[0030] Figure 9 yes Figure 8 Schematic diagram of the structure at point D.

[0031] Figure 10 yes Figure 8 Schematic diagram of the structure at point E in the middle.

[0032] Figure 11 This is a perspective view of the production equipment for moisture-proof food packaging bag composite film according to one embodiment of the present invention.

[0033] Explanation of key figure labels:

[0034] 1-Base layer, 2-Moisture-proof composite layer, 201-Moisture-proof layer, 202-Aluminum foil layer, 203-Protective layer, 3-Connecting adhesive layer, 4-Waterproof layer, 5-Second adhesive layer, 6-Hot pressing box, 601-Hot pressing isolation frame, 602-Composite film tensioning conveyor roller, 603-Composite film conveyor roller, 7-Hot pressing mechanism, 701-Fixed drive component, 702-Heat-conducting curing block, 703-Heating resistance wire, 704-Lifting screw, 705-Drive pulley, 706-Transmission belt, 70 7-Multi-groove pulley, 708-Pressure motor, 8-Adsorption purification mechanism, 801-Adsorption purification box, 802-Gas delivery pipe, 803-Gas collection pipe, 804-Negative pressure fan, 805-Adsorption purification screen, 806-Filter frame, 807-Moving guide block, 808-Slide rod, 809-Reset spring, 810-Shrink film, 811-Dust adsorption screen, 812-Cleaning nozzle, 813-Air guide groove, 814-Limiting shaft, 815-Centrifugal purification screen, 816-Exhaust pipe. Detailed Implementation

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0036] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0037] like Figures 1 to 11 As shown, a moisture-proof food packaging bag composite film according to an embodiment of the present invention includes a base layer 1 and a moisture-proof composite layer 2.

[0038] like Figures 2 to 3 As shown, the moisture-proof composite layer 2 is disposed on one side of the substrate layer 1. The moisture-proof composite layer 2 improves the moisture-proof performance of the substrate layer 1. The moisture-proof composite layer 2 includes a moisture-proof layer 201. The moisture-proof layer 201 facilitates the improvement of the moisture-proof performance of the substrate layer 1.

[0039] like Figures 2 to 3 As shown, an aluminum foil layer 202 is provided on the side of the moisture-proof layer 201 away from the substrate layer 1. This allows the aluminum foil layer 202 to provide auxiliary moisture protection for the substrate layer 1. A protective layer 203 is provided between the aluminum foil layer 202 and the moisture-proof layer 201. The protective layer 203 provides extended protection for the substrate layer 1. An adhesive layer 3 connects the substrate layer 1, the moisture-proof layer 201, the aluminum foil layer 202, and the protective layer 203. The adhesive layer 3 connects and fixes the substrate layer 1, the moisture-proof layer 201, the aluminum foil layer 202, and the protective layer 203.

[0040] Specifically, the protective layer 203 is made of porous silica, which improves its moisture-proof performance.

[0041] like Figures 2 to 3 As shown, a waterproof layer 4 is provided on the side of the substrate layer 1 away from the moisture-proof layer 201. The waterproof layer 4 improves the waterproof performance of the substrate layer 1, thereby enhancing its moisture-proof performance during food packaging. A second adhesive layer 5 connects the waterproof layer 4 to the substrate layer 1. The second adhesive layer 5 serves to connect and fix the waterproof layer 4 to the substrate layer 1.

[0042] Specifically, the thickness of the multilayer adhesive layer 3 and the second adhesive layer 5 is the same. This facilitates the simultaneous bonding and curing of the substrate layer 1, moisture-proof layer 201, aluminum foil layer 202, protective layer 203, and waterproof layer 4 through hot pressing.

[0043] A production equipment for a moisture-proof food packaging bag composite film includes: a hot pressing treatment box 6, a hot pressing isolation frame 601, a hot pressing treatment mechanism 7, and an adsorption purification mechanism 8.

[0044] like Figure 4 As shown, a hot-pressing isolation frame 601 is connected inside the hot-pressing chamber 6. The hot-pressing isolation frame 601 serves to divide the space within the hot-pressing chamber 6. Simultaneously, it facilitates the provision of hot-pressing space for the hot-pressing mechanism 7 through the hot-pressing chamber 6. The hot-pressing isolation frame 601, in conjunction with the hot-pressing chamber 6, forms a gas purification chamber, a hot-pressing control chamber, and a drive control chamber. This facilitates the separation of the hot-pressing, driving, and gas purification processes of the composite membrane through the gas purification chamber, hot-pressing control chamber, and drive control chamber, improving the energy efficiency and environmental friendliness of the hot-pressing process for the composite membrane.

[0045] like Figure 11As shown, a composite film tensioning conveyor roller 602 is provided on one side of the hot pressing chamber 6, and a composite film conveying roller 603 is provided on the side of the hot pressing chamber 6 away from the composite film tensioning conveyor roller 602. This facilitates the supporting and conveying of the composite film through the cooperation of the composite film tensioning conveyor roller 602 and the composite film conveying roller 603, thereby improving the convenience of processing the composite film.

[0046] like Figures 4 to 6 As shown, the hot-pressing mechanism 7 is located within the hot-pressing control chamber. This facilitates the hot-pressing curing of the composite film within the hot-pressing isolation frame 601. The hot-pressing mechanism 7 includes a pair of fixed driving members 701. These members provide support, fixation, and movement control for the thermally conductive curing block 702. This allows for the hot-pressing curing of the composite film by controlling the operation of the pair of fixed driving members 701.

[0047] like Figures 4 to 6 As shown, a thermally conductive curing block 702 is connected to the side of each pair of fixed driving components 701 that is in close contact with each other. The thermally conductive curing block 702 performs thermo-press curing of the composite film between the pair of fixed driving components 701. Multiple sets of heating resistance wires 703 are connected to the thermally conductive curing block 702. The operation of the multiple sets of heating resistance wires 703 controls the heating of the thermally conductive curing block 702. A pair of lifting screws 704 are threaded to both sides of each fixed driving component 701, and the multiple lifting screws 704 are all installed through the pair of fixed driving components 701. This facilitates the support, limiting, and movement control of the fixed driving components 701 through the lifting screws 704.

[0048] like Figures 4 to 6 As shown, each of the multiple lifting screws 704 located within the drive control cavity has a drive pulley 705 connected to one end. This facilitates rotational control of the lifting screws 704 by rotating the drive pulleys 705, thereby allowing a pair of fixed drive components 701 to move with the rotation of the lifting screws 704 under the action of internal and external threads. This facilitates the hot pressing treatment of the composite film.

[0049] like Figures 4 to 7 As shown, a transmission belt 706 is sleeved on the outer side of the drive pulley 705. The transmission belt 706 serves to connect the drive pulley 705 and the grooved pulley 707, so that the drive pulley 705 can rotate synchronously with the grooved pulley 707 under the action of the transmission belt 706.

[0050] like Figures 4 to 7As shown, a grooved pulley 707 is connected to the side of the transmission belt 706 away from the drive pulley 705. The grooved pulley 707 transmits power to the pressing motor 708. The pressing motor 708 is connected to the grooved pulley 707, allowing for rotational control of the grooved pulley 707 by controlling the operation of the pressing motor 708.

[0051] like Figures 8 to 10 As shown, the adsorption purification mechanism 8 is located inside the gas purification chamber. This facilitates the adsorption and purification of harmful gases generated during the hot pressing process of the composite membrane, improving the energy efficiency and environmental friendliness of the composite membrane production process. The adsorption purification mechanism 8 includes an adsorption purification box 801. The adsorption purification box 801 provides adsorption and purification space for harmful gases.

[0052] like Figures 8 to 10 As shown, gas delivery pipes 802 are connected to both sides of the adsorption purification box 801. The gas delivery pipes 802 connect the adsorption purification box 801 to the gas collecting pipe 803, facilitating the delivery of harmful gases within the gas collecting pipe 803. The end of the gas delivery pipe 802 furthest from the adsorption purification box 801 is connected to the gas collecting pipe 803, which is connected to the thermostatic control chamber. Harmful gases within the thermostatic control chamber are guided and delivered through the gas collecting pipe 803.

[0053] like Figures 8 to 10 As shown, a negative pressure fan 804 is installed between the gas delivery pipe 802 and the adsorption purification box 801. This allows for the generation of negative pressure by controlling the operation of the negative pressure fan 804, facilitating the adsorption of harmful gases within the thermostatic control chamber by the gas delivery pipe 802 and the gas collecting pipe 803. The adsorption purification box 801 contains a pair of adsorption purification screens 805. These screens adsorb and purify the harmful gases within the adsorption purification box 801. Filter frames 806 are installed on opposite sides of each pair of adsorption purification screens 805. The filter frames 806 support and fix the dust adsorption screen 811.

[0054] like Figures 8 to 10 As shown, movable guide blocks 807 are fixedly connected to both sides of the filter frame 806, and movable sliding grooves matching the movable guide blocks 807 are provided on the inner wall of the adsorption purification box 801. The movable guide blocks 807 and the movable sliding grooves cooperate to guide the movement of the filter frame 806.

[0055] like Figures 8 to 10As shown, a slide rod 808 is provided inside the movable slide groove. The slide rod 808 supports, limits, and guides the movable guide block 807. A return spring 809 is sleeved on the outside of the slide rod 808. The contraction and retraction of the return spring 809 facilitates the support and repositioning of the filter frame 806. A shrink film 810 is connected to the outside of the movable slide groove. The shrink film 810 provides a sealing control for the movable slide groove.

[0056] like Figures 8 to 10 As shown, a dust adsorption mesh 811 is connected inside the filter frame 806. The dust adsorption mesh 811 filters and purifies the harmful gases transported by the gas delivery pipe 802. Multiple evenly distributed cleaning nozzles 812 are connected to the inner wall of the filter frame 806, and the cleaning nozzles 812 are matched with the dust adsorption mesh 811. The gas output through the multiple cleaning nozzles 812 serves as a backflushing purification function for the dust adsorption mesh 811. An air guide groove 813 is provided inside the filter frame 806, and the air guide groove 813 is connected to a movable slide groove. This facilitates the transport of gas from the movable slide groove to the cleaning nozzles 812 during the movement of the movable guide block 807.

[0057] like Figures 8 to 10 As shown, a limiting shaft 814 is provided between a pair of adsorption purification nets 805, and the limiting shaft 814 is rotatably connected to the adsorption purification box 801. The limiting shaft 814 supports and limits the multiple centrifugal purification nets 815. Multiple evenly distributed centrifugal purification nets 815 are fixedly connected to the outside of the limiting shaft 814. This facilitates multi-angle adsorption and purification of the gas in the adsorption purification box 801 through the multiple centrifugal purification nets 815. An exhaust pipe 816 is connected to the substrate layer 1, and the exhaust pipe 816 matches the centrifugal purification nets 815. The purified gas in the adsorption purification box 801 is discharged through the exhaust pipe 816.

[0058] In practical use, the composite film of the food packaging bag is supported and conveyed by the cooperation of the composite film tensioning conveyor roller 602 and the composite film conveyor roller 603. When the food packaging bag composite film is conveyed into the hot pressing control cavity by the composite film tensioning conveyor roller 602 and the composite film conveyor roller 603, the thermally conductive curing block 702 is preheated by controlling the operation of multiple sets of heating resistance wires 703.

[0059] Subsequently, the operation of the pressing motor 708 drives the multi-groove pulley 707 to rotate, causing multiple drive pulleys 705 to rotate synchronously with the multi-groove pulley 707 under the action of the transmission belt 706. The multiple drive pulleys 705 drive the lifting screw 704 to rotate, causing a pair of fixed drive components 701 to move with the lifting screw 704 under the action of internal and external threads. The movement of the pair of fixed drive components 701 drives the heat-conducting curing block 702 to perform heat pressing on the food packaging bag composite film.

[0060] During the hot pressing process, negative pressure can be generated in the gas collection pipe 803 by controlling the operation of the negative pressure fan 804, thereby facilitating the collection of harmful gases in the hot pressing control chamber through the gas collection pipe 803. The collected harmful gases are transported to the adsorption purification box 801 by the gas delivery pipe 802. A set of dust adsorption mesh 811 in the adsorption purification box 801 adsorbs and filters the particulate impurities contained in the harmful gases. After adsorption and filtration, the harmful gases are purified by the adsorption purification mesh 805 and the limiting rotating shaft 814 and then discharged through the exhaust pipe 816, improving the environmental friendliness of the hot pressing process for food packaging bag composite films.

[0061] Furthermore, when a significant amount of particulate impurities adhere to the outer side of the dust adsorption mesh 811, the filter frame 806 compresses the return spring 809 under the airflow of the negative pressure fan 804. During the compression of the return spring 809, the gas in the moving slide groove can be transported along the air guide groove 813 to the cleaning nozzle 812. The dust adsorption mesh 811 is backflushed and cleaned by outputting gas through multiple cleaning nozzles 812. After the dust adsorption mesh 811 is cleaned, the filter frame 806 can be reset under the action of the return spring 809.

[0062] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A production equipment for a moisture-proof food packaging bag composite film, characterized in that, include: A hot press treatment chamber, wherein a hot press isolation frame is connected inside the hot press treatment chamber, and the hot press isolation frame cooperates with the hot press treatment chamber to form a gas purification chamber, a hot press control chamber and a drive control chamber; A hot pressing mechanism is provided inside the hot pressing control cavity. The hot pressing mechanism includes a pair of fixed driving members. A heat-conducting curing block is connected to one side of each pair of fixed driving members that is close to each other. Multiple sets of heating resistance wires are connected to the heat-conducting curing blocks. A pair of lifting screws are threaded to both sides of each fixed driving member. Multiple lifting screws are arranged through the pair of fixed driving members. An adsorption purification mechanism is provided inside the gas purification chamber. The adsorption purification mechanism includes an adsorption purification box. Gas delivery pipes are connected to both sides of the adsorption purification box. A gas collection pipe is connected to the end of the gas delivery pipe away from the adsorption purification box. The gas collection pipe is connected to the thermo-pressure control chamber. A negative pressure fan is installed between the gas delivery pipe and the adsorption purification box. A pair of adsorption purification screens are installed inside the adsorption purification box. Filter frames are installed on opposite sides of each pair of adsorption purification screens. Movable guide blocks are fixedly connected to both sides of each filter frame. A movable sliding groove matching the movable guide blocks is opened on the inner wall of the adsorption purification box. A sliding rod is installed within the movable sliding groove, and a return spring is sleeved on the outer side of the sliding rod. A shrink film is connected to the outer side of the movable sliding groove. A dust adsorption screen is connected inside the filter frame. Multiple evenly distributed cleaning nozzles are connected to the inner wall of the filter frame. The cleaning nozzles match the dust adsorption screen. An air guide groove is opened inside the filter frame, and the air guide groove communicates with the movable sliding groove.

2. The production equipment for the moisture-proof food packaging bag composite film as described in claim 1, characterized in that, One side of the hot pressing chamber is provided with a composite film tensioning conveyor roller, and the side of the hot pressing chamber away from the composite film tensioning conveyor roller is provided with a composite film conveyor roller.

3. The production equipment for the moisture-proof food packaging bag composite film as described in claim 1, characterized in that, Each of the multiple lifting screws has a drive pulley connected to one end within the drive control cavity. A drive belt is fitted around the outside of the drive pulley, and a grooved pulley is connected to the side of the drive belt away from the drive pulley. A pressing motor is connected to the grooved pulley.

4. The production equipment for the moisture-proof food packaging bag composite film as described in claim 1, characterized in that, A limiting shaft is provided between the pair of adsorption purification nets. The limiting shaft is rotatably connected to the adsorption purification box. Multiple evenly distributed centrifugal purification nets are fixedly connected to the outside of the limiting shaft. An exhaust pipe is connected to the adsorption purification box and is matched with the centrifugal purification net.

Images