Efficient and environment-friendly aluminum-plastic composite film production line and production process thereof

Abstract

The invention discloses an efficient and environment-friendly aluminum-plastic composite film production line and a production process thereof, and the process comprises the following steps: step 1, gluing the upper surface of a PET film, then baking, then adhering the upper surface of the PET film to one surface of an aluminum foil by virtue of a gluing surface to form a PET aluminum composite film, rolling, and then curing a PET aluminum composite film roll for later use; secondly, one surface of an upper-layer BOPP film is glued and then baked, then the upper-layer BOPP film is attached to the other face of the aluminum foil of the PET aluminum composite film through the glued face to form a BOPP aluminum PET composite film, and the BOPP aluminum PET composite film is rolled to form a three-layer film roll for standby application; and step 3, gluing the lower surface of the PET film of the three-layer film roll, then baking the PET film, then winding the lower surface of the PET film with the aid of the gluing surface and the lower-layer BOPP film, and finally curing the PET film to form a four-layer composite film roll finished product. The process is simple, curing times are reduced, part of semi-finished products can be produced in advance, and production efficiency and product quality are improved.

Description

Technical Field

[0001] The invention relates to an aluminum-plastic composite film production device and a production process thereof, in particular to an efficient and environmentally friendly aluminum-plastic composite film production line and a production process thereof. Background Art

[0002] Aluminum-plastic composite film has excellent barrier properties, rubbing resistance, environmental protection characteristics, etc., so it is widely used in chemical product packaging, pharmaceutical packaging, food packaging and other occasions. Take the four-layer composite film composed of bottom BOPP film, PET film, aluminum foil and upper BOPP from bottom to top as an example. The composite equipment is equipped with a drying channel, which is mainly used to bake the adhesive surface (the side with adhesive) of the film material after gluing (coating), so that the adhesive material and the film material are reliably attached together.

[0003] The current composite process of the above four-layer composite film is as follows: The first step is to produce two layers of semi-finished products: PET gluing - passing through the drying tunnel - compounding BOPP - entering the aging furnace - coming out of the oven for use.

[0004] The second step is to produce three-layer semi-finished products: the other side of the semi-finished PET product of the first step is glued - passed through the drying tunnel - composited with aluminum foil AL - entered the aging furnace - and came out of the oven for use.

[0005] The third step is to produce a four-layer finished product: use pre-printed BOPP for gluing - pass through a drying tunnel - compound - enter a curing oven - and then come out of the oven and cut.

[0006] In order to reduce the surface friction coefficient of BOPP film, lubricants are generally added during processing. In the above process, the BOPP film after the first step of aging treatment has the characteristic of precipitating lubricant powder. After the two layers of semi-finished products in the first step are composited with the aluminum foil in the second step and rolled up, the lubricant powder will contaminate the surface of the aluminum foil AL composited in the second step during the rolling standby period. The aluminum foil is contaminated, causing the third step of composite contamination, and there is a risk of delamination. In addition, the disadvantage 1 is that the semi-finished products in the first step are prone to aging after entering the third aging furnace.

[0007] In addition, since the surface BOPP film with a printed layer is prepared according to the order requirements, when the order is received, the first step of the composite film needs to be processed before the surface BOPP film can be composited. However, since the BOPP film after the first step of aging treatment has the characteristic of precipitating smooth powder, it cannot be produced in advance, resulting in a lag in production efficiency.

[0008] In addition, the drying channel of the composite equipment is equipped with an exhaust port, which is directly connected to the main exhaust pipe, and the output end of the main exhaust pipe is equipped with a filter device and an exhaust fan. The main exhaust pipe is arranged in the production workshop, and its output end is at a relatively far position. Therefore, the negative pressure suction of the main exhaust pipe is relatively small, and it cannot meet the exhaust volume in the drying channel of the composite machine far away from the filter device (environmental protection equipment), resulting in a large amount of residual solvent gas in the drying channel of these equipment, reducing the composite strength between the substrates and increasing the risk of delamination. Summary of the invention

[0009] The object of the present invention is to provide a high-efficiency and environmentally friendly aluminum-plastic composite film production line with a simple and reasonable structure, adjustable exhaust volume and reduced residual solvent gas in a drying channel.

[0010] The object of the present invention is achieved in that: A highly efficient and environmentally friendly aluminum-plastic composite film production line comprises a first unwinding mechanism, a second unwinding mechanism, a gluing mechanism, a drying tunnel, a laminating roller group and a winding mechanism, wherein the first unwinding mechanism and the second unwinding mechanism are respectively used to unwind film materials; the gluing mechanism applies glue to one of the film materials, the drying tunnel is used to bake the glued film material, the laminating roller group presses two film materials, and the winding mechanism is used to roll up the pressed composite film; an exhaust port is provided on the drying tunnel, the exhaust port is connected to a main exhaust pipe through a variable frequency fan, and a filtering device and an exhaust fan are provided at the output end of the main exhaust pipe.

[0011] The purpose of the present invention can also be solved by the following technical measures: As a more specific solution, the drying tunnel is provided with a temperature sensor and / or a volatile gas sensor, and the temperature sensor and / or the volatile gas sensor are electrically connected to the control circuit of the variable frequency fan, and the control circuit controls the operation of the variable frequency fan according to the data collected by the temperature sensor and / or the volatile gas sensor. When the temperature of the drying tunnel is low, the amount of volatile gas (solvent gas) released is small, and to avoid taking away the working heat of the drying tunnel, the control circuit controls the fan to work at a low frequency; when the temperature of the drying tunnel is too high or the volatile gas content is high, the control circuit controls the fan to work at a high frequency to quickly exhaust the volatile gas. A wind pressure sensor can be set in the main exhaust pipe, and the control circuit of the exhaust fan controls the speed of the exhaust fan according to the detection data of the wind pressure sensor, and the speed is high when the wind pressure is high, and low when it is low.

[0012] As a further solution, the main exhaust pipe is further provided with a plurality of air intake ports, each of which is provided with a one-way valve. The air intake ports can absorb air from the workshop to achieve ventilation.

[0013] As a further solution, the main exhaust pipe is a round pipe, and the air inlet and outlet of the variable frequency fan are both connected to the round pipe. The round pipe can reduce air resistance and make exhaust smoother.

[0014] Another object of the present invention is to provide a production process for aluminum-plastic composite film which is simple to operate, reduces the number of aging times, can pre-produce part of semi-finished products, and improves production efficiency and product quality.

[0015] Another object of the present invention is achieved like this: An efficient and environmentally friendly production process of aluminum-plastic composite film: The first step is to glue the upper surface of the PET film and then bake it. Then, the upper surface of the PET film is laminated with one side of the aluminum foil by means of the glued surface to form a PET aluminum composite film, and then rolled up. Then, the PET aluminum composite film roll is cured and then put into use. In the second step, one surface of the upper BOPP film is glued and then baked, and then the upper BOPP film is laminated with the other side of the aluminum foil of the PET aluminum composite film by means of the glued surface to form a BOPP aluminum PET composite film, and the BOPP aluminum PET composite film is rolled up to form a three-layer film roll for standby use; The third step is to glue the lower surface of the PET film of the three-layer film roll and then bake it. Then, the lower surface of the PET film is glued with the lower BOPP film by the glued surface and rolled up. Finally, it is cured to form a four-layer composite film roll finished product.

[0016] Another purpose of the present invention can also be solved by the following technical measures: As a more specific solution, the upper BOPP film is an upper BOPP film with a printed surface, and the adhesive surface of the upper BOPP film is the printed surface.

[0017] As a further solution, the PET aluminum composite film rolls after aging can be stored in larger quantities. Since the PET film does not affect the precipitation of the composite material, it can be properly stored and can enter the second step of processing immediately after receiving the order, greatly improving production efficiency.

[0018] As a further solution, the three-layer film roll needs to be laminated with the lower BOPP film within three hours at room temperature.

[0019] As a further solution, the three-layer film roll needs to remain stationary before being compounded with the lower BOPP film. In order to allow the upper BOPP film to wait until the aluminum foil of the PET aluminum composite film is compounded before the lower BOPP film is compounded for aging treatment, thereby reducing one aging process, the waiting time before the three-layer film roll enters the third step of processing is controlled to be within three hours and to be stationary (minimize movement). Of course, in actual production, since each layer of compounding corresponds to an independent device, and the time required to compound a roll of film is relatively short (mainly due to the long aging time and short compounding time), the third step of processing can be carried out soon after the second step is completed.

[0020] As a further solution, the lower layer BOPP film is a BOPP film with heat-sealing properties.

[0021] The beneficial effects of the present invention are as follows: (1) The drying tunnel of the aluminum-plastic composite film production line of the present invention is connected to the main exhaust pipe through a variable frequency fan, which meets the exhaust volume requirement of the drying tunnel, effectively exhausts the solvent gas in the drying tunnel, ensures the composite strength between the substrates, and reduces the risk of delamination.

[0022] (2) The present invention enhances the composite strength of the product and improves air pollution by coordinating the positions of the main exhaust pipe and the equipment, ensuring that the solvent gas from the drying channel of the equipment is quickly and sufficiently transmitted to the filtration system through the air duct, thereby greatly reducing the amount of solvent residue.

[0023] (3) The composite process of the present invention first composites the film material without the precipitation of undesirable substances, which will not pollute the aluminum foil, facilitates the long-term storage of semi-finished products, does not affect the composite performance, and has a low probability of delamination; after receiving a new order, two layers of BOPP can be composited on the basis of the semi-finished product in the first step, and then the aging treatment is carried out to reduce the one-time aging and improve the product quality.

[0024] (4) The second and third steps of the composite membrane production process of the present invention are continuous production, which reduces production costs, improves product quality, work efficiency and space utilization, and reduces the error rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the first step processing structure of the aluminum-plastic composite film of the present invention.

[0026] Figure 2 It is a schematic diagram of the second step processing structure of the aluminum-plastic composite film of the present invention.

[0027] Figure 3 It is a schematic diagram of the third step processing structure of the aluminum-plastic composite film of the present invention.

[0028] Figure 4 It is a schematic diagram of the connection structure of multiple aluminum-plastic composite film production lines and a main exhaust pipe of the present invention.

[0029] Figure 5 Process flow chart of the present invention. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: See also Figure 1As shown, an efficient and environmentally friendly aluminum-plastic composite film production line includes a first unwinding mechanism 901, a second unwinding mechanism 902, a gluing mechanism 10, a drying tunnel 20, a laminating roller group 70 and a winding mechanism 903. The first unwinding mechanism 901 and the second unwinding mechanism 902 are respectively used to release film materials; the gluing mechanism 10 applies glue to one of the film materials, the drying tunnel 20 is used to bake the glued film material, the laminating roller group 70 presses the two film materials, and the winding mechanism 903 is used to roll up the pressed composite film; the drying tunnel 20 is provided with an exhaust port 201, the exhaust port 201 is connected to the main exhaust pipe 40 through a variable frequency fan 30, and the output end of the main exhaust pipe 40 is provided with a filter device 50 and an exhaust fan 60.

[0031] The drying tunnel 20 is provided with a temperature sensor and / or a volatile gas sensor, which is electrically connected to a control circuit 301 of the variable frequency fan 30. The control circuit controls the operation of the variable frequency fan 30 according to data collected by the temperature sensor and / or the volatile gas sensor.

[0032] The main exhaust pipe 40 is also provided with a plurality of air intake ports, each of which is provided with a one-way valve.

[0033] The main exhaust pipe 40 is a circular pipe, and the air inlet and outlet ends of the variable frequency fan 30 are both connected to the circular pipe.

[0034] Combination Figure 5 As shown, a highly efficient and environmentally friendly aluminum-plastic composite film production process: In the first step, the upper surface of the PET film 1 is glued and then baked. Then, the upper surface of the PET film 1 is bonded to one side of the aluminum foil 2 by means of the glued surface to form a PET aluminum composite film, and then rolled up. Next, the PET aluminum composite film roll C is aged and then used. Figure 1 As shown, the first step is to use the first aluminum-plastic composite film production line J1 for processing. The PET film roll A is unrolled from the first unwinding mechanism 901 and enters the gluing mechanism 10 to glue its upper surface, and then enters the drying tunnel 20 (transported in the direction of the arrow H). The aluminum foil roll B is unrolled from the second unwinding mechanism 902, and the upper surface of the PET film 1 is compounded with one side of the aluminum foil 2 by the help of the gluing surface under the action of the laminating roller group 70. Finally, it is rolled into a PET aluminum composite film roll C under the action of the winding mechanism 903. The PET aluminum composite film roll C enters the aging furnace 80 for aging treatment and is taken out for standby use.

[0035] In the second step, one surface of the upper BOPP film 3 is glued and then baked. Then, the glued surface of the upper BOPP film 3 is laminated to the other side of the aluminum foil 2 of the PET aluminum composite film to form a BOPP aluminum PET composite film. The BOPP aluminum PET composite film is rolled up to form a three-layer film roll E for standby use. The upper BOPP film 3 is an upper BOPP film 3 with a printed surface, and the glued surface of the upper BOPP film 3 is the printed surface. Figure 2 As shown, the second step uses the second aluminum-plastic composite film production line J2 for processing. The upper BOPP film roll A is unwound from the first unwinding mechanism 901 and enters the gluing mechanism 10 to glue the printed surface, and then enters the drying tunnel 20 (transported in the direction of the arrow H). The PET aluminum composite film roll C is unwound from the second unwinding mechanism 902. The upper BOPP film 3 is compounded with the other side of the aluminum foil 2 by the gluing surface under the action of the laminating roller group 70, and finally rolled into a three-layer film roll E under the action of the winding mechanism 903. The three-layer film roll E does not enter the aging furnace. The three-layer film roll E is controlled by the production plan to be stationary at room temperature for no more than three hours and then compounded with the lower BOPP film 4, as shown in the third step.

[0036] In the third step, the lower surface of the PET film 1 of the three-layer film roll E is glued and then baked, and then the lower surface of the PET film 1 is glued with the lower BOPP film 4 and rolled up, and finally, it is cured to form a four-layer composite film roll G finished product. Figure 3 As shown, the third step adopts the third aluminum-plastic composite film production line J3 for processing. The three-layer film roll E is unwound from the first unwinding mechanism 901 and enters the gluing mechanism 10 to glue the surface of the PET film 1, and then enters the drying tunnel 20 (transported in the direction of the arrow H). The lower BOPP film roll F is unwound from the second unwinding mechanism 902. The lower surface of the PET film 1 is compounded with the lower BOPP film 4 by the help of the gluing surface under the action of the laminating roller group 70, and finally rolled into a four-layer composite film roll G under the action of the winding mechanism 903. The four-layer composite film roll G enters the aging furnace 80 for aging treatment and is taken out to become a final product that can be slit and finally used.

[0037] The PET aluminum composite film roll C after the aging treatment can be stored in large quantities.

[0038] The lower BOPP film 4 is a BOPP film with heat-sealing properties.

[0039] The drying tunnels 20 of the above three aluminum-plastic composite film production lines are connected to the main exhaust pipe 40 through the variable frequency fans 30, respectively. Figure 4 shown.

[0040] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A highly efficient and environmentally friendly aluminum-plastic composite film production line, comprising a first unwinding mechanism (901), a second unwinding mechanism (902), a gluing mechanism (10), a drying tunnel (20), a laminating roller group (70) and a winding mechanism (903), wherein the first unwinding mechanism (901) and the second unwinding mechanism (902) are respectively used to unwind film materials; the gluing mechanism (10) is used to apply glue to one of the film materials, the drying tunnel (20) is used to bake the glued film material, the laminating roller group (70) is used to laminarize two film materials, and the winding mechanism (903) is used to roll up the laminated composite film; the characteristics are as follows: The drying tunnel (20) is provided with an exhaust port (201), the exhaust port (201) is connected to a main exhaust pipe (40) via a variable frequency fan (30), and a filter device (50) and an exhaust fan (60) are provided at the output end of the main exhaust pipe (40).

2. The efficient and environmentally friendly aluminum-plastic composite film production line according to claim 1 is characterized in that: The drying tunnel (20) is provided with a temperature sensor and / or a volatile gas sensor, and the temperature sensor and / or the volatile gas sensor are electrically connected to a control circuit (301) of the variable frequency fan (30), and the control circuit controls the operation of the variable frequency fan (30) according to data collected by the temperature sensor and / or the volatile gas sensor.

3. The efficient and environmentally friendly aluminum-plastic composite film production line according to claim 1 is characterized in that: The main exhaust pipe (40) is also provided with a plurality of air intake ports, each of which is provided with a one-way valve.

4. The efficient and environmentally friendly aluminum-plastic composite film production line according to claim 1 is characterized in that: The main exhaust pipe (40) is a circular pipe, and the air inlet and outlet ends of the variable frequency fan (30) are both connected to the circular pipe.

5. An efficient and environmentally friendly aluminum-plastic composite film production process, characterized by: The first step is to glue the upper surface of the PET film (1) and then bake it. Then, the upper surface of the PET film (1) is laminated to one side of the aluminum foil (2) by means of the glued surface to form a PET aluminum composite film, and then rolled up. Then, the PET aluminum composite film roll (C) is cured and then put into use. In the second step, one surface of the upper BOPP film (3) is glued and then baked, and then the upper BOPP film (3) is laminated with the other side of the aluminum foil (2) of the PET aluminum composite film by means of the glued surface to form a BOPP aluminum PET composite film, and the BOPP aluminum PET composite film is rolled up to form a three-layer film roll (E) for standby use; In the third step, the lower surface of the PET film (1) of the three-layer film roll (E) is glued and then baked, and then the lower surface of the PET film (1) is glued with the lower BOPP film (4) by means of the upper glue surface and rolled up, and finally, it is cured to form a finished four-layer composite film roll (G).

6. The highly efficient and environmentally friendly aluminum-plastic composite film production process according to claim 5 is characterized in that: The upper BOPP film (3) is an upper BOPP film (3) with a printed surface, and the adhesive surface of the upper BOPP film (3) is the printed surface.

7. The highly efficient and environmentally friendly aluminum-plastic composite film production process according to claim 5 is characterized in that: The PET aluminum composite film roll (C) after aging treatment can be stored in large quantities.

8. The highly efficient and environmentally friendly aluminum-plastic composite film production process according to claim 5, characterized in that: The three-layer film roll (E) needs to be laminated with the lower BOPP film (4) within three hours at room temperature.

9. The highly efficient and environmentally friendly aluminum-plastic composite film production process according to claim 8, characterized in that: The three-layer film roll (E) needs to remain stationary before being laminated with the lower BOPP film (4).

10. The highly efficient and environmentally friendly aluminum-plastic composite film production process according to claim 5, characterized in that: The lower layer BOPP film (4) is a BOPP film with heat-sealing properties.

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