PVA film efficient sealing system based on integration of water sealing and heat sealing

Abstract

The invention relates to the technical field of film sealing, and discloses a PVA film efficient sealing system based on water sealing and heat sealing integration, which comprises a water sealing device used for accommodating water required by water sealing and controlling water flow and water pressure to perform water sealing treatment on a PVA film; the PVA film subjected to water sealing treatment is conveyed to the heat sealing device and is used for carrying out heat sealing treatment on the PVA film; the conveying device is used for conveying the PVA film between the water sealing device and the heat sealing device; the control module is used for coordinating the work of the water sealing device, the heat sealing device and the conveying device and monitoring the working state of each device in real time; water sealing and heat sealing are combined, the advantages of the two sealing modes are brought into full play, the sealing efficiency of the PVA film is greatly improved, the water sealing can avoid overheating deformation of the film, the heat sealing can achieve firm sealing, the combination of the water sealing and the heat sealing can guarantee the stability of the sealing quality, full-automatic operation of the sealing process is achieved, manual intervention is reduced, and the production efficiency is improved. And the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of film sealing, and in particular to a PVA film efficient sealing system based on integrated water sealing and heat sealing. Background Art

[0002] With the improvement of environmental awareness and the development of technology, the application of degradable materials in the packaging industry is becoming more and more extensive. Polyvinyl alcohol (PVA) film has been widely used in packaging, agriculture, water treatment and other fields due to its excellent barrier properties, water solubility and biodegradability. This film plays an important role in these industries, especially in situations where high barrier properties and environmental protection performance are required. However, there are some significant problems in the traditional PVA film sealing method, which limit the further expansion of its application; the traditional PVA film sealing method usually adopts heat sealing technology, but this method has some obvious defects. First of all, the simple heat sealing method may cause the film to be damaged during the sealing process. Overheating during heat sealing causes deformation of the film. This deformation not only affects the appearance of the film, but also may reduce its sealing strength, resulting in unstable sealing performance at the sealing part. In addition, temperature control during heat sealing is also a problem. Too high or too low temperature will affect the sealing quality. Another common sealing method is water sealing, which can avoid the overheating problem to a certain extent. However, water sealing also has its own disadvantages. Although water sealing can provide a more uniform sealing strength, its sealing speed is relatively slow, which will significantly reduce production efficiency in large-scale production. In addition, water sealing has high requirements for equipment, requires additional water resources and treatment facilities, and increases production costs. Therefore, in order to overcome these shortcomings of traditional PVA film sealing methods, it is urgent to develop an efficient and stable PVA film sealing system. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to design a PVA film efficient sealing system based on water sealing and heat sealing integration.

[0004] The present invention provides a PVA film efficient sealing system based on water sealing and heat sealing integration, the PVA film efficient sealing system based on water sealing and heat sealing integration comprises a water sealing device, a heat sealing device, a conveying device and a control module, wherein:

[0005] The water seal device is used to contain the water required for the water seal and control the water flow and water pressure to perform water seal treatment on the PVA film;

[0006] Heat sealing device, the PVA film after water sealing treatment is conveyed to the heat sealing device for heat sealing treatment of the PVA film;

[0007] A conveying device, used for conveying the PVA film between the water sealing device and the heat sealing device;

[0008] The control module is used to coordinate the work of the water sealing device, the heat sealing device and the conveying device, and monitor the working status of each device in real time.

[0009] Optionally, in the first implementation mode of the present invention, the water sealing device is composed of a sealing water tank, a high-pressure water spraying mechanism and a water circulation mechanism; the sealing water tank is used to contain the water required for the water seal; the high-pressure water spraying mechanism is used to generate a high-pressure water flow; the water circulation mechanism is used to realize the recycling of water; wherein during the water sealing process, the high-pressure water spraying mechanism sprays the high-pressure water flow onto the sealing part of the PVA film, and utilizes the pressure and cooling effect of the water to achieve preliminary sealing of the PVA film at a lower temperature.

[0010] Optionally, in a second implementation of the present invention, the heat sealing device includes a heating element, a temperature control mechanism and a pressure regulating mechanism; the heating element is used to quickly heat up and heat the PVA film to soften the sealing part of the PVA film; the temperature control mechanism is used to control the heat sealing temperature; the pressure regulating mechanism is used to adjust the heat sealing pressure according to different film thicknesses and sealing requirements, so that the PVA film can fit tightly during the heat sealing process and perform a firm heat seal.

[0011] Optionally, in a third implementation of the present invention, a method for realizing a PVA film efficient sealing system based on integrated water sealing and heat sealing comprises the following steps:

[0012] Pretreatment: Check the status of the water seal device and heat seal device to ensure the normal operation of the equipment, clean and dry the PVA film to be sealed until there is no impurity on the surface;

[0013] Water sealing treatment: The PVA film to be sealed is sent into the water sealing device, and the film is water sealed by the high-pressure water spraying mechanism, which sprays high-pressure water flow to the sealing part and makes the sealing part of the film initially bonded at a lower temperature, while playing a cooling role to prevent the film from overheating and deformation;

[0014] Heat sealing treatment: The PVA film that has been water-sealed is transferred to the heat sealing device. The heating element of the heat sealing device heats the PVA film coated with water film, and uses the pressure regulating mechanism to apply pressure to the film, so that the film melts at high temperature and fuses with each other to fit tightly;

[0015] Cooling and shaping: After sealing is completed, the PVA film is immediately moved to the cooling device for rapid cooling to fix the sealing shape and enhance the mechanical strength of the sealing part;

[0016] Quality inspection: Conduct quality inspection on the sealed PVA film. Mark and rework the unqualified PVA film. The quality inspection index at least includes the sealing and strength of the sealed part.

[0017] Packaging and storage: Qualified PVA film products are packaged for storage and transportation.

[0018] Optionally, in a fourth implementation of the present invention, the pressure of the high-pressure water flow during the water seal treatment process is 1 MPa-1.5 MPa, and the water temperature is 10°C-20°C.

[0019] Optionally, in a fifth implementation of the present invention, the heating temperature during the heat sealing process is 150°C-200°C, and the pressure is 0.5 kN / cm 2 -0.8kN / cm 2 .

[0020] Optionally, in a sixth implementation of the present invention, the cooling temperature during the cooling and shaping process is 5°C-15°C, and the cooling time is 10s-30s.

[0021] Optionally, in the seventh implementation of the present invention, the air pressure method is used to detect the sealing of the sealing part during the quality inspection process, and the inspection pressure is 0.1MPa-0.3MPa; the strength of the sealing part is tested by tensile test, and the tensile strength is not less than 10MPa.

[0022] The beneficial effects of the present invention are as follows: the present invention combines water sealing and heat sealing, giving full play to the advantages of the two sealing methods and greatly improving the sealing efficiency of the PVA film; water sealing can prevent the film from overheating and deformation, and heat sealing can achieve firm sealing, and the combination of the two can ensure the stability of the sealing quality; the water sealing device is equipped with an efficient water circulation mechanism, which realizes the recycling of water resources, thereby greatly reducing the consumption of water resources. At the same time, the heat sealing device is equipped with a precise temperature control system, which can accurately control the heating temperature and effectively avoid energy waste. This precise temperature control not only improves the sealing effect, but also further improves the overall energy utilization efficiency; in the sealing process, the introduction of fully automated operation significantly reduces the need for manual intervention, thereby improving production efficiency, and automated equipment can ensure the consistency and accuracy of the sealing process, thereby improving the overall quality of the product. By reducing the error of manual operation, the automated sealing system not only improves production efficiency, but also ensures the stability and reliability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0024] Figure 1A schematic structural diagram of a PVA film efficient sealing system based on integrated water sealing and heat sealing provided in an embodiment of the present invention;

[0025] Figure 2 A schematic flow chart of a method for implementing a PVA film efficient sealing system based on integrated water sealing and heat sealing provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" or "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, device, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] For ease of understanding, the specific process of the embodiment of the present invention is described below. Figure 1 The structural schematic diagram of the PVA film efficient sealing system based on water sealing and heat sealing integration provided by an embodiment of the present invention comprises a water sealing device, a heat sealing device, a conveying device and a control module, wherein:

[0028] The water seal device is used to contain the water required for the water seal and control the water flow and water pressure to perform water seal treatment on the PVA film;

[0029] Heat sealing device, the PVA film after water sealing treatment is conveyed to the heat sealing device for heat sealing treatment of the PVA film;

[0030] A conveying device, used for conveying the PVA film between the water sealing device and the heat sealing device;

[0031] The control module is used to coordinate the work of the water sealing device, the heat sealing device and the conveying device, and monitor the working status of each device in real time.

[0032] In this embodiment, the water sealing device is composed of a sealing water tank, a high-pressure water spraying mechanism and a water circulation mechanism; the sealing water tank is used to contain the water required for the water seal; the high-pressure water spraying mechanism is used to generate a high-pressure water flow; the water circulation mechanism is used to achieve water recycling; wherein during the water sealing process, the high-pressure water spraying mechanism sprays the high-pressure water flow onto the sealing part of the PVA film, and utilizes the water pressure and cooling effect to achieve preliminary sealing of the PVA film at a lower temperature.

[0033] In this embodiment, the heat sealing device includes a heating element, a temperature control mechanism and a pressure regulating mechanism; the heating element is used to quickly heat up and heat the PVA film to soften the sealing part of the PVA film; the temperature control mechanism is used to control the heat sealing temperature; the pressure regulating mechanism is used to adjust the heat sealing pressure according to different film thicknesses and sealing requirements, so that the PVA film can fit tightly during the heat sealing process and perform a firm heat seal.

[0034] See also Figure 2 , a schematic flow chart of a method for implementing a PVA film efficient sealing system based on integrated water sealing and heat sealing provided by an embodiment of the present invention, the method comprising:

[0035] The method for realizing a PVA film efficient sealing system based on water sealing and heat sealing integration comprises the following steps:

[0036] Pretreatment: Check the status of the water seal device and heat seal device to ensure the normal operation of the equipment, clean and dry the PVA film to be sealed until there is no impurity on the surface;

[0037] Water sealing treatment: The PVA film to be sealed is sent into the water sealing device, and the film is water sealed by the high-pressure water spraying mechanism, which sprays high-pressure water flow to the sealing part and makes the sealing part of the film initially bonded at a lower temperature, while playing a cooling role to prevent the film from overheating and deformation;

[0038] Heat sealing treatment: The PVA film that has been water-sealed is transferred to the heat sealing device. The heating element of the heat sealing device heats the PVA film coated with water film, and uses the pressure regulating mechanism to apply pressure to the film, so that the film melts at high temperature and fuses with each other to fit tightly;

[0039] Cooling and shaping: After sealing is completed, the PVA film is immediately moved to the cooling device for rapid cooling to fix the sealing shape and enhance the mechanical strength of the sealing part;

[0040] Quality inspection: Conduct quality inspection on the sealed PVA film. Mark and rework the unqualified PVA film. The quality inspection index at least includes the sealing and strength of the sealed part.

[0041] Packaging and storage: Qualified PVA film products are packaged for storage and transportation.

[0042] In this embodiment, the pressure range of the equipment can be checked to see whether it is within the preset range. For example, the water pressure of the water seal device is usually 0.5MPa-2MPa, and the pressure regulating mechanism of the heat seal device can generate a pressure of 0.2kN / cm 2 -1kN / cm 2; Clean and dry the PVA film to be sealed until there is no impurity on the surface. Cleaning can be done by wiping with a dust-free cloth or by gas blowing. The drying temperature can be controlled at 40℃-60℃ to ensure that the film will not be deformed or damaged during the drying process.

[0043] In this embodiment, during the water seal treatment, the pressure range of the high-pressure water flow is set between 1MPa and 1.5MPa. At the same time, in order to ensure that the initial bonding of the materials and the effective cooling effect can be achieved under low temperature conditions, the water temperature is controlled between 10℃ and 20℃. This precise control not only helps to improve the treatment efficiency, but also ensures that the quality of the final product meets the expected standards.

[0044] In this embodiment, during the heat sealing process, it is necessary to pay attention to controlling the two key parameters of heating temperature and pressure. Specifically, the heating temperature should be maintained between 150°C and 200°C, and the pressure should be set at 0.5 kN / cm 2 Up to 0.8kN / cm 2 By precisely controlling these two parameters within the range, it is possible to ensure that the film can achieve a good heat-sealing effect under appropriate temperature and pressure conditions. Such heat-sealing treatment can not only ensure the sealing performance of the film, but also avoid film damage caused by excessive temperature or pressure, thereby ensuring the quality and safety of the product.

[0045] In this embodiment, during the cooling and shaping process, the cooling temperature needs to be controlled between 5°C and 15°C. This temperature range is to ensure that the film material can be fully cooled and shaped to achieve the desired physical and chemical properties. In order to achieve the best cooling effect, the cooling time needs to be appropriately adjusted according to the thickness of the film and the sealing area. Specifically, the cooling time should be between 10 seconds and 30 seconds to ensure that the film material will not deform or shrink during the cooling process. By precisely controlling the cooling temperature and time, it can be ensured that the quality and performance of the film material meet the use requirements of the final product.

[0046] In this embodiment, during the quality inspection process, the air pressure method is used to evaluate the sealing of the sealing parts. Specifically, the pressure applied during the inspection ranges from 0.1MPa to 0.3MPa. Through this method, it can be ensured that the sealing parts can effectively maintain sealing in actual use to prevent leakage of gas or liquid. In addition, in order to further verify the strength of the sealing parts, a tensile test is also carried out. In the tensile test, the tensile strength of the sealing parts must reach or exceed the standard of 10MPa. This indicator ensures that the sealing parts can maintain structural integrity when subjected to external forces and will not easily break or be damaged. Through the comprehensive use of the air pressure method and the tensile test, the sealing and strength of the sealing parts can be comprehensively evaluated, thereby ensuring that the overall quality of the product meets the predetermined standards.

[0047] In this embodiment, the air pressure method is a method for detecting the sealing of an object. When the sealed PVA film is tested for sealing, the specific operation of the air pressure method is as follows: first, place the sealed PVA film sample in a sealed test cavity to ensure that the connection between the film and the test cavity is tight and there is no leakage point; then, inject a certain pressure of gas into the test cavity through a specific device, and the detection pressure is usually in the range of 0.1MPa-0.3MPa. After injecting the gas, observe the pressure change in the test cavity; if the pressure in the test cavity remains stable within a certain period of time without a significant decrease, it means that the sealing part of the PVA film is well sealed. If the pressure drops significantly, it indicates that there is a leakage point, that is, the sealing of the sealing part is unqualified; the air pressure method has the advantages of relatively simple operation, fast detection speed, and more intuitive results. It can effectively detect small leaks in the sealing part of the PVA film and ensure the quality of the product.

[0048] In this embodiment, the tensile test is a test method for measuring the mechanical properties of materials. When the strength test is performed on the sealed PVA film, the specific operation is as follows:

[0049] 1. Test Preparation

[0050] Prepare a tensile testing machine: Select a tensile testing machine with appropriate range and accuracy to ensure that it can accurately measure the tensile properties of the PVA film;

[0051] Prepare the sample: Cut out a sample of standard shape from the sealed PVA film, usually in the shape of a long strip. The size and shape of the sample should meet the requirements of relevant standards.

[0052] 2. Test process

[0053] Install the sample: Clamp both ends of the sample on the clamp of the tensile testing machine, make sure the clamp clamps the sample tightly and the position of the sample in the clamp is correct without slipping or deflection;

[0054] Set test parameters: Set test speed, stretch length and other parameters on the tensile testing machine. Generally, the test speed can be set within a certain range, such as 5mm / min-50mm / min. The specific speed is determined according to the actual situation and standard requirements;

[0055] Start the test: Start the tensile testing machine, which will apply gradually increasing tensile force to the sample to stretch it. During the stretching process, the testing machine will record data such as the tensile force and the elongation of the sample in real time;

[0056] 3. Results Analysis

[0057] Observe the failure form: When the sample is stretched to fracture, observe the failure form of the sample to determine whether it is a normal fracture or an abnormal fracture caused by defects in the sealing part;

[0058] Calculate tensile strength: Calculate tensile strength based on the data recorded during the test. Tensile strength refers to the ratio of the maximum tensile force that a sample can withstand before breaking to the original cross-sectional area of ​​the sample. For PVA film, the tensile strength should not be less than 10MPa. If the tensile strength is lower than this value, it means that the strength of the sealed PVA film is unqualified;

[0059] The tensile test can effectively evaluate the strength performance of the sealed PVA film and provide an important basis for product quality control.

[0060] In this embodiment, in order to ensure the quality of the PVA film product, qualified products must strictly comply with relevant regulations when being packaged to ensure their safety and stability during storage and transportation. The choice of packaging materials should be determined according to the specific storage and transportation environment to ensure the protection effect of the product under different conditions. During the packaging process, it is necessary to ensure that the inside of the package remains dry, and the humidity should be controlled between 30% RH and 50% RH to prevent the product from getting damp or moldy due to excessive humidity. In addition, the storage temperature should also be controlled between 10°C and 30°C to avoid adverse effects of excessively high or low temperatures on product performance. Through these measures, it can be ensured that the PVA film products maintain their original excellent quality during storage and transportation and meet the customer's usage needs.

[0061] Embodiment 1:

[0062] Pretreatment: Check the water seal device and heat seal device to ensure that the water pressure of the water seal device is 1.2MPa and the pressure generated by the pressure regulating mechanism of the heat seal device is 0.6kN / cm 2 , dry the PVA film to be sealed at 50°C to ensure that there are no impurities on the film surface;

[0063] Water seal treatment: send the PVA film into the water seal device, set the high-pressure water flow pressure to 1.2MPa, and the water temperature to 15℃, and perform water seal treatment on the sealing part to make the film initially bonded and cooled;

[0064] Heat sealing treatment: The film after water sealing treatment is transferred to the heat sealing device, the heating element heats the film to 180℃, and the pressure regulating mechanism applies 0.6kN / cm 2 Pressure heat sealing makes the film melt and fit tightly;

[0065] Cooling and shaping: After sealing, the film is moved to the cooling device with a cooling temperature of 10°C and a cooling time of 20s;

[0066] Quality inspection: Use air pressure method to inspect the sealing performance, the inspection pressure is 0.2MPa. Carry out tensile test, the tensile strength should not be less than 10MPa, mark the unqualified products and rework them;

[0067] Packaging and storage: Qualified PVA film products are packed with specific packaging materials, the storage environment humidity is controlled at 40% RH, and the storage temperature is 20℃.

[0068] Embodiment 2:

[0069] Pretreatment: Check the water seal device and heat seal device to ensure that the water pressure of the water seal device is 1MPa and the pressure that the heat seal device pressure regulating mechanism can generate is 0.5kN / cm 2 , dry the PVA film to be sealed at 45°C to ensure that there are no impurities on the film surface;

[0070] Water seal treatment: send the PVA film into the water seal device, set the high-pressure water flow pressure to 1.1MPa, and the water temperature to 18℃, and perform water seal treatment on the sealing part to make the film initially bonded and cooled;

[0071] Heat sealing treatment: The film after water sealing treatment is transferred to the heat sealing device, the heating element heats the film to 170℃, and the pressure regulating mechanism applies 0.55kN / cm 2 The pressure heat seal makes the film melt and fuse tightly.

[0072] Cooling and shaping: After sealing, the film is moved to the cooling device with a cooling temperature of 8°C and a cooling time of 15s;

[0073] Quality inspection: Use air pressure method to inspect the sealing performance, the inspection pressure is 0.15MPa. Carry out tensile test, the tensile strength should not be less than 10MPa, mark the unqualified products and rework them;

[0074] Packaging and storage: Qualified PVA film products are packed with specific packaging materials, the storage environment humidity is controlled at 35% RH, and the storage temperature is 15℃.

[0075] Embodiment 3

[0076] Pretreatment: Check the water seal device and heat seal device to ensure that the water pressure of the water seal device is 1.5MPa and the pressure generated by the pressure regulating mechanism of the heat seal device is 0.8kN / cm 2 , dry the PVA film to be sealed at 55°C to ensure that there are no impurities on the film surface;

[0077] Water seal treatment: send the PVA film into the water seal device, set the high-pressure water flow pressure to 1.4MPa, and the water temperature to 12℃, and perform water seal treatment on the sealing part to make the film initially bonded and cooled;

[0078] Heat sealing treatment: The film after water sealing treatment is transferred to the heat sealing device, the heating element heats the film to 190℃, and the pressure regulating mechanism applies 0.75kN / cm 2 Pressure heat sealing makes the film melt and fit tightly;

[0079] Cooling and shaping: After sealing, the film is moved to the cooling device with a cooling temperature of 12°C and a cooling time of 25s;

[0080] Quality inspection: Use air pressure method to inspect the sealing performance, the inspection pressure is 0.25MPa. Carry out tensile test, the tensile strength should not be less than 10MPa, mark the unqualified products and rework them;

[0081] Packaging and storage: Qualified PVA film products are packed with specific packaging materials, the storage environment humidity is controlled at 45% RH, and the storage temperature is 25℃.

[0082] By analyzing the experimental process and results of Example 1, Example 2 and Example 3, the following experimental conclusions can be drawn:

[0083] 1. Sealing effect:

[0084] The PVA film high-efficiency sealing method based on water sealing and heat sealing can achieve good sealing effect under different parameter combinations, regardless of the parameter settings in Example 1 (water seal device water pressure of 1.2MPa, water temperature of 15°C, heat sealing temperature of 180°C, pressure of 0.6kN / cm 2 etc.), or different parameter combinations of Example 2 and Example 3, the PVA film after sealing treatment showed high sealing and strength in quality inspection, which shows that the sealing method has strong stability and reliability and can adapt to different production needs;

[0085] The water sealing treatment performs preliminary bonding and cooling of the film sealing parts at a relatively low temperature, effectively avoiding overheating and deformation of the film, and laying a good foundation for the subsequent heat sealing treatment. In the three embodiments, the water sealing treatment plays a key role in ensuring the quality of the film during the sealing process;

[0086] The heat sealing process precisely controls the temperature and pressure to make the films melt and fuse at high temperature, thus achieving a firm seal. Different combinations of heat sealing temperature and pressure parameters have a certain influence on the sealing effect, but within a reasonable parameter range, they can meet the sealing requirements of the PVA film. For example, the heat sealing temperature in Example 1 is 180°C and the pressure is 0.6 kN / cm 2 In Example 2, the heat sealing temperature is 170°C and the pressure is 0.55 kN / cm 2 In Example 3, the heat sealing temperature is 190°C and the pressure is 0.75 kN / cm 2 , both achieved good sealing effects.

[0087] 2. Quality inspection:

[0088] The air pressure method and tensile test are used to test the quality of the sealed PVA film, which can accurately evaluate the sealing and strength of the film. In the three embodiments, no obvious leakage was found through the air pressure test, indicating that the sealing of the sealing part is good. The tensile test results show that the tensile strength of the PVA film in the three embodiments is not less than 10MPa, which meets the quality requirements of the product;

[0089] The quality inspection process is crucial to ensuring product quality. By marking and reworking unqualified products, the product qualification rate can be effectively improved and the stable quality of products can be ensured.

[0090] 3. Parameter influence:

[0091] Different parameter settings have a certain impact on the sealing effect and quality test results. For example, the water pressure and water temperature of the water sealing device, the heating temperature and pressure of the heat sealing device, the cooling temperature and time of the cooling device, and other parameters will affect the sealing quality of the PVA film. In actual production, it is necessary to select a suitable combination of parameters according to different film materials, thicknesses and sealing requirements to achieve the best sealing effect; as the parameters change, the energy consumption and production efficiency in the sealing process will also be different. When selecting parameters, it is necessary to comprehensively consider factors such as sealing quality, energy consumption and production efficiency to maximize economic and social benefits.

[0092] In summary, the efficient sealing method of PVA film based on integrated water sealing and heat sealing has achieved good sealing effects in Example 1, Example 2 and Example 3. This method has the advantages of high sealing efficiency, stable quality, cost savings, and high degree of automation. It provides an effective solution for the sealing of PVA film. In actual production, a suitable parameter combination can be selected according to the specific situation to meet different production needs.

[0093] The above 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 by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A PVA film high-efficiency sealing system based on water sealing and heat sealing, characterized in that: The PVA film efficient sealing system based on water sealing and heat sealing integration includes a water sealing device, a heat sealing device, a conveying device and a control module, wherein: The water seal device is used to contain the water required for the water seal and control the water flow and water pressure to perform water seal treatment on the PVA film; Heat sealing device, the PVA film after water sealing treatment is conveyed to the heat sealing device for heat sealing treatment of the PVA film; A conveying device, used for conveying the PVA film between the water sealing device and the heat sealing device; The control module is used to coordinate the work of the water sealing device, the heat sealing device and the conveying device, and monitor the working status of each device in real time.

2. A PVA film efficient sealing system based on water sealing and heat sealing integration as claimed in claim 1, characterized in that: The water sealing device consists of a sealing water tank, a high-pressure water spraying mechanism and a water circulation mechanism; the sealing water tank is used to contain the water required for the water seal; the high-pressure water spraying mechanism is used to generate a high-pressure water flow; the water circulation mechanism is used to realize the recycling of water; wherein during the water sealing process, the high-pressure water spraying mechanism sprays the high-pressure water flow onto the sealing part of the PVA film, and utilizes the pressure and cooling effect of the water to achieve preliminary sealing of the PVA film at a relatively low temperature.

3. The PVA film efficient sealing system based on water sealing and heat sealing integration as claimed in claim 1, characterized in that: The heat sealing device includes a heating element, a temperature control mechanism and a pressure regulating mechanism; the heating element is used to quickly heat up and heat the PVA film to soften the sealing part of the PVA film; the temperature control mechanism is used to control the heat sealing temperature; the pressure regulating mechanism is used to adjust the heat sealing pressure according to different film thicknesses and sealing requirements, so that the PVA film can fit tightly during the heat sealing process and perform a firm heat seal.

4. The PVA film efficient sealing system based on water sealing and heat sealing integration as claimed in claim 1, characterized in that: The method for realizing a PVA film efficient sealing system based on water sealing and heat sealing integration comprises the following steps: Pretreatment: Check the status of the water seal device and heat seal device to ensure the normal operation of the equipment, clean and dry the PVA film to be sealed until there is no impurity on the surface; Water sealing treatment: The PVA film to be sealed is sent into the water sealing device, and the film is water sealed by the high-pressure water spraying mechanism, which sprays high-pressure water flow to the sealing part and makes the sealing part of the film initially bonded at a lower temperature, while playing a cooling role to prevent the film from overheating and deformation; Heat sealing treatment: The PVA film that has been water-sealed is transferred to the heat sealing device. The heating element of the heat sealing device heats the PVA film coated with water film, and uses the pressure regulating mechanism to apply pressure to the film, so that the film melts at high temperature and fuses with each other to fit tightly; Cooling and shaping: After sealing is completed, the PVA film is immediately moved to the cooling device for rapid cooling to fix the sealing shape and enhance the mechanical strength of the sealing part; Quality inspection: Conduct quality inspection on the sealed PVA film. Mark and rework the unqualified PVA film. The quality inspection index at least includes the sealing and strength of the sealed part. Packaging and storage: Qualified PVA film products are packaged for storage and transportation.

5. A PVA film efficient sealing system based on water sealing and heat sealing integration as claimed in claim 4, characterized in that: During the water seal treatment process, the pressure of the high-pressure water flow is 1MPa-1.5MPa, and the water temperature is 10°C-20°C.

6. A PVA film high-efficiency sealing system based on water sealing and heat sealing integration as claimed in claim 4, characterized in that: The heating temperature during the heat sealing process is 150°C-200°C and the pressure is 0.5 kN / cm 2 -0.8kN / cm 2 .

7. A PVA film high-efficiency sealing system based on water sealing and heat sealing integration as claimed in claim 4, characterized in that: The cooling temperature during the cooling and shaping process is 5° C.-15° C., and the cooling time is 10s-30s.

8. The PVA film efficient sealing system based on water sealing and heat sealing integration as claimed in claim 4, characterized in that: During the quality inspection process, the air pressure method is used to detect the sealing of the sealing part, and the detection pressure is 0.1MPa-0.3MPa; the strength of the sealing part is tested by tensile test, and the tensile strength is not less than 10MPa.

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