Production process and system of high-weatherability polarizing plate

Abstract

This invention provides a production process and system for high weather-resistant polarizing films, belonging to the field of optical thin film manufacturing technology. The process includes washing, swelling, dyeing, stretching, water cutting, and drying. It further includes: in the swelling process, applying ultrasonic vibration to the PVA film while simultaneously performing a longitudinal micro-stretching treatment of 1.05 to 1.30 times; the drying process is a multi-stage independent drying process, with a width detection device installed at the inlet and outlet of each drying zone. Based on the width detection data obtained by the width detection device, a dynamic tension compensation system dynamically calculates and applies the tension compensation amount corresponding to each drying zone. This invention provides a method that can actively and precisely control the tension distribution during the drying process of PVA film, actively, in real-time, and in zones to regulate the lateral shrinkage behavior of the PVA film, minimizing and homogenizing internal stress during its formation, thereby significantly reducing its internal stress and improving the weather resistance of the polarizing film.

Description

Technical Field

[0001] This invention relates to the field of optical thin film manufacturing technology, and more specifically to a production process and system for a high weather-resistant polarizer. Background Technology

[0002] OLED (Organic Light Emitting Diode) is a type of organic light-emitting diode with self-emissive properties. Due to its ultra-thin, flexible, high-contrast, and fast-response characteristics, it is widely used in displays, lighting, and other electronic devices. In the field of display technology, polarizers are important optical components used to control the propagation direction and polarization state of light. Currently, OLED display technology has begun to be applied in automotive displays, becoming a new direction for technological research and application. For OLED display technology to achieve breakthroughs in high-end automotive applications, higher requirements are placed on the flexibility and thinness of polarizers, as well as higher requirements for weather resistance.

[0003] PVA film undergoes iodine staining, stretching, and drying to form a polarizing film with polarization function. During this process, especially the drying stage, improper control of PVA molecular chain orientation and solvent evaporation can easily generate uneven residual internal stress within the film. This residual stress is the root cause of failures in polarizers during downstream module processing or end-use environments, such as dimensional shrinkage, warping, and even PVA layer cracking when exposed to temperature changes (thermal shock) or high temperature / high humidity conditions. This addresses the long-standing industry challenge of improving weather resistance and dimensional stability.

[0004] Traditional production processes only achieve basic swelling during the swelling stage, resulting in uneven swelling of PVA molecular chains and disordered initial states. During the drying stage, simple tension control using constant tension or monotonically decreasing tension is often employed, failing to simultaneously achieve precise dimensional control and effective release of internal stress. Especially in the high-temperature, low-humidity main drying zone, excessively low tension leads to irreversible excessive shrinkage, while excessively high tension exacerbates the accumulation of internal stress. This internal stress can cause dimensional changes, warping, or even cracking of the polarizer under high-temperature, high-humidity or thermal cycling conditions, severely impacting its weather resistance.

[0005] Traditional iodine-based polarizers cannot meet the weather resistance requirements of 105℃*1000h and 85℃*85%RH*1000h. Therefore, there is an urgent need in this field for an innovative process that can systematically and synergistically control the internal stress generation source (swelling orientation) to the curing endpoint (drying stress) to fundamentally improve the weather resistance of polarizers and enable the application of OLED polarizers in high-end automotive displays. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a production process and system for high weather resistance polarizers. This production process and system can actively and precisely control the tension distribution of PVA film during the drying process, thereby significantly reducing its internal stress and ultimately obtaining a polarizer with high weather resistance.

[0007] To achieve the above objectives, embodiments of the present invention provide a manufacturing process for high weather-resistant polarizing film, including water washing, swelling, dyeing, stretching, water cutting, and drying processes, and further comprising: In the swelling process, ultrasonic vibration is applied to the PVA film, and at the same time, a micro-stretching treatment of 1.05 to 1.30 times in the longitudinal direction is performed. The drying process is a multi-stage independent drying process. A width detection device is set at the entrance and exit of each drying zone. Based on the width detection data obtained by the width detection device, a dynamic tension compensation system is used to dynamically calculate and apply the tension compensation amount corresponding to each drying zone.

[0008] Optionally, in the swelling process, at least one sidewall or bottom of the swelling tank is provided with a plurality of ultrasonic transducers, the ultrasonic transducers having an operating frequency of 20kHz to 65kHz.

[0009] Optionally, the width detection device acquires width detection data through a line laser scanning width measuring instrument, with a sampling frequency greater than or equal to 200 Hz.

[0010] Optionally, the tension compensation amount is obtained according to the control model of formula (1). (1) in, The target wide shrinkage rate for the current drying zone, This represents the measured wide-range shrinkage rate of the current drying zone. This represents the rate of change of the wide-range shrinkage rate. This is the proportionality coefficient. The differential time constant is For the first Tension compensation amount of each drying zone This represents the number of dry zones.

[0011] Optionally, the scaling factor The value range is 15 N / m to 30 N / m, and the differential time constant is... The value ranges from 1 second to 2.5 seconds.

[0012] Optionally, the shrinkage rate is obtained according to formula (2). (2) in, This is the measured width of the previous drying zone. This is the measured width of the current dry area. This represents the measured wide-range shrinkage rate of the current drying zone.

[0013] Optionally, the multi-stage independent drying is a three-stage drying, which includes, in sequence along the film-moving direction, a first low-temperature pre-drying zone, a second high-temperature main drying zone, and a third stress relaxation equilibrium zone; The temperature of the first low-temperature pre-drying zone is 60-75℃ and the relative humidity is 70-92%; the temperature of the second high-temperature main drying zone is 75-85℃ and the relative humidity is 30-50%; the temperature of the third stress relaxation equilibrium zone is 55-65℃ and the relative humidity is 20%-45%.

[0014] Optionally, in the drying process, a tension distribution that decreases along the film-moving direction is preset as a reference tension setting value for each drying zone. Based on the reference tension setting value and the tension compensation amount, the actual tension acting on each drying zone is obtained.

[0015] On the other hand, the present invention also provides a production system for high weather-resistant polarizers, for implementing the production process of high weather-resistant polarizers as described in any one of the above claims, comprising: The washing tank, swelling tank, dyeing tank, stretching tank, water cutting tank, and multi-section independent drying oven are arranged in sequence. Wide-range detection devices are installed at the inlet and outlet of each drying chamber section; Tension actuators are installed in each section of the drying chamber; The control unit is communicatively connected to the wide-range detection device and the tension actuator. The control unit is configured to execute a dynamic tension compensation system to dynamically calculate and apply the tension compensation amount corresponding to each drying zone.

[0016] Optionally, the tension actuation device includes a tension sensor, a servo motor, and a feedback controller.

[0017] Through the above technical solution, this invention provides a production process and system for high weather-resistant polarizing films. The production process includes washing, swelling, dyeing, stretching, water cutting, and drying steps. In the swelling step, ultrasonic vibration is applied to the PVA film, and simultaneously, a longitudinal micro-stretching treatment of 1.05 to 1.30 times is performed. The drying step is a multi-stage independent drying process, with a width detection device installed at the inlet and outlet of each drying zone. Based on the width detection data obtained by the width detection device, a dynamic tension compensation system dynamically calculates and applies the tension compensation amount corresponding to each drying zone. This invention achieves active, real-time, and zoned control of the film's lateral shrinkage behavior, minimizing and homogenizing internal stress during the formation process. Through ultrasonic micro-stretching and dynamic tension compensation, internal stress can be systematically eliminated, improving the weather resistance and dimensional stability of the polarizing film.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a process flow diagram of the production process of a high weather-resistant polarizer according to one embodiment of the present invention. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0021] In the embodiments of this application, certain software, components, models and other existing solutions in the industry may be mentioned. These should be regarded as exemplary and are only intended to illustrate the feasibility of implementing the technical solution of this application. However, they do not mean that the applicant has used or necessarily used the solution.

[0022] like Figure 1 The diagram shown is a production process flow chart of a high weather-resistant polarizer according to one embodiment of the present invention. Figure 1The production process may include steps S1 (washing), S2 (swelling), S3 (dyeing), S4 (stretching), S5 (water cutting), and S6 (drying). In step S2 (swelling), ultrasonic vibration is applied to the PVA film. Utilizing its mechanical effect, this promotes uniform permeation and swelling of the PVA film at the molecular level. Simultaneously, a longitudinal micro-stretching treatment of 1.05 to 1.30 times is performed, allowing the PVA molecular chains to achieve initial orientation. This fundamentally reduces the inhomogeneity of the initial microstructure, laying the foundation for subsequent steps.

[0023] In the swelling process of step S2, at least one sidewall or bottom of the swelling tank is provided with multiple ultrasonic transducers, the operating frequency of which is 20kHz to 65kHz. In one example of the present invention, the operating frequency of the ultrasonic transducers is set to 25kHz to 55kHz, the power density is 0.3 to 0.8 W / cm², and the processing time is 1 to 3 minutes, ensuring the uniform swelling of the PVA film while avoiding excessive ultrasonication that could damage the PVA film structure.

[0024] In step S6, the drying process is a multi-stage independent drying process. Width detection devices are installed at the inlet and outlet of each drying zone. Based on the width detection data obtained by the width detection devices, a dynamic tension compensation system dynamically calculates and applies the tension compensation amount corresponding to each drying zone. This achieves active, real-time, and zoned control of the lateral shrinkage behavior of the PVA film, minimizing and homogenizing the internal stress during its formation. The width detection device acquires width detection data using a line laser scanning width meter with a sampling frequency greater than or equal to 200 Hz. The width detection data is fed back to the dynamic tension compensation system to automatically adjust the tension parameters, with a system response time of less than 1.0 second. The specific method for determining the tension compensation amount can be of various forms known to those skilled in the art. In one example of this invention, the tension compensation amount can be obtained according to the control model of formula (1). (1) in, The target wide shrinkage rate for the current drying zone, This represents the measured wide-range shrinkage rate of the current drying zone. This represents the rate of change of the wide-range shrinkage rate. This is the proportionality coefficient. The differential time constant is For the first Tension compensation amount of each drying zone This refers to the number of dry zones. Specifically, the proportionality coefficient. The value range is 15 N / m to 30 N / m, preferably 18 N / m to 28 N / m, for the differential time constant. The value ranges from 1 second to 2.5 seconds, preferably from 1.3 seconds to 2.2 seconds. and Within this range, the tension compensation amount can be quickly adjusted to fine-tune deviations in the wide-range shrinkage rate.

[0025] The shrinkage rate is obtained according to formula (2). (2) in, This is the measured width of the previous drying zone. This is the measured width of the current dry area. This represents the measured wide-range shrinkage rate of the current drying zone. It reflects the relative shrinkage of the PVA film within each individual drying zone.

[0026] In the drying process of step S6, the multi-stage independent drying is a three-stage drying process, which sequentially includes a first low-temperature pre-drying zone, a second high-temperature main drying zone, and a third stress relaxation equilibrium zone along the film-moving direction. Specifically, the temperature of the first low-temperature pre-drying zone is 60-75℃, and the relative humidity is 70-92%; the temperature of the second high-temperature main drying zone is 75-85℃, and the relative humidity is 30-50%; the temperature of the third stress relaxation equilibrium zone is 55-65℃, and the relative humidity is 20%-45%.

[0027] In the drying process, a tension distribution that decreases gradually along the film-moving direction is preset as a reference tension setting value for each drying zone. Based on the reference tension setting value and the tension compensation amount, the actual tension acting on each drying zone is obtained. This composite tension control strategy achieves dynamic and precise compensation for local shrinkage deviations while ensuring that the overall tension follows a gradual decreasing trend that is beneficial to stress release.

[0028] On the other hand, the present invention also provides a production system for high weather-resistant polarizing film, used to implement the production process of high weather-resistant polarizing film as described in any of the above claims, comprising: a washing tank, a swelling tank, a dyeing tank, a stretching tank, a water-cutting tank, and a multi-segment independent drying oven arranged sequentially; a width detection device installed at the inlet and outlet of each drying oven segment; a tension actuator installed in each drying oven segment; and a control unit. The control unit is communicatively connected to the width detection device and the tension actuator. The control unit is configured to execute a dynamic tension compensation system to dynamically calculate and apply the tension compensation amount corresponding to each drying zone. The control unit uses a PLC controller to ensure that all modules work together to achieve precise control of process parameters. The tension actuator includes a tension sensor, a servo motor, and a feedback controller. The actual tension obtained by the tension actuator is applied to the PVA film.

[0029] The measurement method involved in this invention is as follows: Evaluation method for polarizer crack defects: Weather resistance test. Cut the polarizer sample to size (25cm*25cm), attach it to the glass with OCA adhesive, and place it in a thermal shock tester (CZ-I-80A type). It is subjected to thermal shock conditions of -40℃ to 85℃ for 1000 cycles. Use a polarizing microscope (Zeiss AxioLab 5) to observe whether cracks appear in the PVA layer. No cracks are judged as qualified.

[0030] Evaluation method for polarizer shrinkage defects: Weather resistance test. Cut polarizer samples to size (25cm*25cm), attach them to glass with OCA adhesive, and place them in a high-temperature test chamber (CZ-D-150D type) and a constant temperature and humidity test chamber (CZ-A-150D type) for 1000 hours at 105℃ and 85℃ / 85%RH respectively. Use a polarizing microscope (Zeiss AxioLab 5) to measure the change in the long side dimension of the polarizer before and after the test, and calculate the sample size change rate. Size change rate = (shrinkage size / initial size) × 100%. If the shrinkage width ≤ sample long side * 0.5%, it is considered qualified.

[0031] Optical performance testing methods: Transmittance and polarization degree testing were conducted using a spectrophotometer (Shimadzu UV-2600) to measure the polarization degree and single-element transmittance of the polarizer within the range of 380nm to 780nm.

[0032] Example 1 This embodiment fully demonstrates the manufacturing process of the high weather-resistant polarizer described in this invention, employing an optimized dynamic tension compensation system.

[0033] Step S1, the water washing process, removes the unstretched 60 A thick PVA optical film is immersed in a water washing tank filled with desalinated water to remove surface dust and plasticizers. In step S2, the film is immersed in a pure water swelling tank at 35°C. An array of ultrasonic transducers is evenly arranged on the bottom and side walls of the swelling tank, and ultrasonic vibration at a frequency of 40 kHz and a power density of approximately 0.5 W / cm² is applied for 2 minutes. Simultaneously, a tension roller causes the film to undergo a 1.2-fold longitudinal micro-stretch within the tank, promoting uniform water molecule penetration and achieving molecular-level uniform swelling.

[0034] Step S3 involves dyeing and cross-linking the swollen PVA optical film sequentially. Step S4 involves stretching the film. Step S5 involves water cutting, washing, and color correction to obtain an undried polarizing film. Specific process parameters are as follows: the dyeing tank contains KI / I2 / H3BO3 at 35°C and a residence time of 120 seconds; the washing tank 1 contains KI / H3BO3 at 38°C; the stretching tank contains KI / H3BO3 at 60°C with a total stretching ratio of 5.8 times; the color correction tank contains KI at 30°C; the washing tank 2 is at 25°C; and the water cutting tank contains pure water at 25°C.

[0035] Step S6 involves a three-stage dynamic tension drying process, where the undried polarizing film is placed into a three-stage independent drying chamber for drying. The drying chamber is divided sequentially along the film's path into a first low-temperature pre-drying zone, a second high-temperature main drying zone, and a third stress relaxation equilibrium zone. The temperature and humidity of each zone are independently controllable. Linear laser scanning width gauges are installed at the drying chamber inlet and at the outlet of each section, with a sampling frequency of 200 Hz to monitor the film width in real time. The control system response time is less than 0.5 s.

[0036] Drying process parameters: First low-temperature pre-drying zone: temperature 70℃, relative humidity 85%RH, gentle hot air; Second high-temperature main drying zone: temperature 80℃, relative humidity 40%RH, high-speed hot air; Third stress relaxation and equilibrium zone: temperature 60℃, relative humidity 30%RH, low-speed hot air.

[0037] Target shrinkage rates for each zone (based on the inlet width of each zone): First low-temperature pre-drying zone: 3.0%; Second high-temperature main drying zone: 2.6%; Third stress relaxation equilibrium zone: 2.4%.

[0038] Dynamic tension compensation control is performed based on the control model of formula (1), and a proportional coefficient is set. Differential time constant The dynamic tension compensation system calculates the integer values ​​for each interval based on real-time wide-range data, and superimposes them onto the reference tension to achieve closed-loop control.

[0039] After lamination and post-curing, the dried and shaped polarizing film is bonded with a TAC protective film on both sides using an acrylic adhesive. The final polarizing film is obtained by hot air drying and far-infrared drying.

[0040] Operational results: After 24 hours of continuous operation, the measured shrinkage rate of each segment remained stable within ±0.1% of the target value.

[0041] Example 2 Steps S1-S2: The unstretched 30μm thick PVA optical film is processed according to the process in Example 1, except that the ultrasonic frequency of the swelling process is set to 30 kHz and the micro-stretching ratio is 1.25 times.

[0042] Steps S3-S6: Dyeing, cross-linking, stretching, water cutting, washing, and color touch-up are the same as in Example 1. Temperature and humidity conditions in the drying zone are the same as in Example 1. Dynamic tension compensation uses the same model, with parameters set as follows: proportional coefficient. Differential time constant The target shrinkage rate for each zone is the same as in Example 1. The bonding and post-curing processes are the same as in Example 1.

[0043] Operational results: After 24 hours of continuous operation, the measured shrinkage rate of each width segment remained stable within ±0.15% of the target value.

[0044] Example 3 Steps S1-S2: The unstretched 60 μm thick PVA optical film is processed according to the process in Example 1. The ultrasonic frequency of the swelling process is set to 50 kHz, and the micro-stretching ratio is 1.10 times.

[0045] Steps S3-S6: The temperature and humidity conditions in the drying zone are the same as in Example 1. The dynamic tension compensation uses the same model, and the parameters are set as follows: proportional coefficient. Differential time constant The target shrinkage rate for each zone is the same as in Example 1. The bonding and post-curing processes are the same as in Example 1.

[0046] Operational results: After 24 hours of continuous operation, the measured shrinkage rate of each segment remained stable within ±0.2% of the target value.

[0047] Comparative Example 1 Steps S1-S2: The swelling process is the same as in Example 1 (ultrasonic frequency 40 kHz, micro-stretching 1.20 times).

[0048] Steps S3-S6: The temperature and humidity conditions in the drying zone are the same as in Example 1. The dynamic tension compensation uses the same model, but the parameters are set as follows: proportional coefficient. (far below the scope of this invention), differential time constant The bonding and post-curing processes are the same as in Example 1.

[0049] Operational results: After 24 hours of continuous operation, the measured shrinkage rate fluctuation of each segment reached ±0.3%, and the control effect was significantly worse than that of the example.

[0050] Comparative Example 2 Steps S1-S2: Take the unstretched 60... The thick PVA optical film was processed according to the procedure in Example 1, except that: ultrasonic vibration was not applied in the swelling process, only conventional soaking was performed, and the micro-stretch ratio was kept at 1.20 times.

[0051] Steps S3-S6: Other conditions (including drying dynamic compensation parameters) , All are the same as in Example 1.

[0052] Operational results: After 24 hours of continuous operation, the measured shrinkage rate of each width segment remained stable within ±0.4% of the target value.

[0053] Comparative Example 3 Steps S1-S2: The unstretched 60 μm thick PVA optical film is processed according to the procedure in Example 1. Steps S3-S6: The temperature and humidity conditions in the drying zone are the same as in Example 1. The difference is that the tension in the drying zone is controlled by a fixed value, without any dynamic compensation. The bonding and post-curing are the same as in Example 1.

[0054] Operational results: After 24 hours of continuous operation, the measured fluctuation of the shrinkage rate of each segment reached ±0.6%.

[0055] Table 1. Weather resistance test results of polarizers prepared in the examples and comparative examples.

[0056] The test results in Table 1 lead to the following conclusions: Examples 1-3, while maintaining excellent optical performance (transmittance > 43.2%, polarization degree > 99.993%), all passed the rigorous 1000-cycle thermal shock test (without cracks in the PVA layer), and the dimensional change rate was less than 0.5% under high temperature and high temperature and high humidity environments. This fully demonstrates the synergistic effect of the two core technologies, "ultrasonic micro-stretching swelling" and "dynamic tension compensation drying based on wide-range feedback," which can systematically eliminate internal stress from the source to the process, significantly improving the weather resistance and dimensional stability of the polarizer.

[0057] Comparative Example 1 employed dynamic drying compensation parameters, but when the proportional coefficient A was too small (10 N / m), the dynamic compensation system could not provide sufficient adjustment for shrinkage deviation, resulting in a significant decrease in control effectiveness and inferior weather resistance compared to the example. Comparative Example 2 used the exact same dynamic drying compensation parameters, but the polarizer lacking ultrasonic pretreatment developed slight cracks after thermal shock, and its dimensional change rate also increased significantly. Comparative Example 3 used fixed tension drying, and its weather resistance indicators deteriorated across the board. This indicates that without dynamic control based on the real-time shrinkage behavior of the film, the internal stress formed during the drying process cannot be effectively released, leading to a significant decrease in product performance.

[0058] The above results further demonstrate that the present invention, through source control of applying ultrasonic vibration to the PVA film and simultaneously performing micro-stretching, and precise control of the drying process based on wide-range feedback dynamic tension compensation, with the two working in synergy, and strictly limiting key parameters within the scope of the present invention, can significantly reduce the internal stress accumulated during the polarizer production process, thereby obtaining a high-weather-resistant polarizer with both excellent optical performance and outstanding environmental reliability.

[0059] Through the above technical solution, this invention provides a production process and system for high weather-resistant polarizing films. The production process includes washing, swelling, dyeing, stretching, water cutting, and drying steps. In the swelling step, ultrasonic vibration is applied to the PVA film, and simultaneously, a longitudinal micro-stretching treatment of 1.05 to 1.30 times is performed. The drying step is a multi-stage independent drying process, with a width detection device installed at the inlet and outlet of each drying zone. Based on the width detection data obtained by the width detection device, a dynamic tension compensation system dynamically calculates and applies the tension compensation amount corresponding to each drying zone. This invention achieves active, real-time, and zoned control of the film's lateral shrinkage behavior, minimizing and homogenizing internal stress during the formation process. Through ultrasonic micro-stretching and dynamic tension compensation, internal stress can be systematically eliminated, improving the weather resistance and dimensional stability of the polarizing film.

[0060] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0061] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0062] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0063] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0064] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0065] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0066] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0067] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0068] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A manufacturing process for a high weather-resistant polarizing film, comprising washing, swelling, dyeing, stretching, water cutting, and drying, characterized in that, Also includes: In the swelling process, ultrasonic vibration is applied to the PVA film, and at the same time, a micro-stretching treatment of 1.05 to 1.30 times in the longitudinal direction is performed. The drying process is a multi-stage independent drying process. A width detection device is set at the entrance and exit of each drying zone. Based on the width detection data obtained by the width detection device, a dynamic tension compensation system is used to dynamically calculate and apply the tension compensation amount corresponding to each drying zone.

2. The production process of a high-weather-resistant polarizing sheet according to claim 1, characterized by, In the swelling process, at least one sidewall or bottom of the swelling tank is provided with a plurality of ultrasonic transducers, the ultrasonic transducers having an operating frequency of 20kHz to 65kHz.

3. The manufacturing process of the high weather-resistant polarizing film according to claim 1, characterized in that, The width detection device acquires width detection data through a line laser scanning width measuring instrument, with a sampling frequency greater than or equal to 200 Hz.

4. The manufacturing process of the high weather-resistant polarizing film according to claim 1, characterized in that, The tension compensation amount is obtained according to the control model of formula (1). ，（1） in, The target wide shrinkage rate for the current drying zone, This represents the measured wide-range shrinkage rate of the current drying zone. This represents the rate of change of the wide-range shrinkage rate. This is the proportionality coefficient. The differential time constant is For the first Tension compensation amount of each drying zone This represents the number of dry zones.

5. The manufacturing process of the high weather-resistant polarizing film according to claim 4, characterized in that, The proportionality coefficient The value range is 15 N / m to 30 N / m, and the differential time constant is... The value ranges from 1 second to 2.5 seconds.

6. The manufacturing process of the high weather-resistant polarizing film according to claim 4, characterized in that, The shrinkage rate is obtained according to formula (2). ，（2） in, This is the measured width of the previous drying zone. This is the measured width of the current dry area. This represents the measured wide-range shrinkage rate of the current drying zone.

7. The manufacturing process of the high weather-resistant polarizing film according to claim 1, characterized in that, The multi-stage independent drying is a three-stage drying process, which includes, in sequence along the film-moving direction, a first low-temperature pre-drying zone, a second high-temperature main drying zone, and a third stress relaxation equilibrium zone. The temperature of the first low-temperature pre-drying zone is 60-75℃ and the relative humidity is 70-92%; the temperature of the second high-temperature main drying zone is 75-85℃ and the relative humidity is 30-50%; the temperature of the third stress relaxation equilibrium zone is 55-65℃ and the relative humidity is 20%-45%.

8. The production process of a high-weather-resistant polarizing plate according to claim 7, wherein In the drying process, a tension distribution that decreases along the film-moving direction is preset as a reference tension setting value for each drying zone. Based on the reference tension setting value and the tension compensation amount, the actual tension acting on each drying zone is obtained.

9. A production system for high weather-resistant polarizing film, characterized in that, A manufacturing process for implementing the high weather-resistant polarizer as described in any one of claims 1 to 8 includes: The washing tank, swelling tank, dyeing tank, stretching tank, water cutting tank, and multi-section independent drying oven are arranged in sequence. Wide-range detection devices are installed at the inlet and outlet of each drying chamber section; Tension actuators are installed in each section of the drying chamber; The control unit is communicatively connected to the wide-range detection device and the tension actuator. The control unit is configured to execute a dynamic tension compensation system to dynamically calculate and apply the tension compensation amount corresponding to each drying zone.

10. The production system for high weather-resistant polarizing film according to claim 9, characterized in that, The tension actuator includes a tension sensor, a servo motor, and a feedback controller.

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