CN114434767A - Preparation method of polarizer compensation film for OLED flexible display - Google Patents

Abstract

The invention discloses a preparation method of a polarizer compensation film for OLED flexible display, which comprises the following steps: preparing a pair of molten masses from a high molecular polymer forming the polarizer compensation film through a melting machine; step two, the melt obtained in the step one is further prepared into a sheet or a thick film through a long and narrow machine head matched with a melting machine; conveying the obtained product to synchronous optical oblique stretching equipment through a first transmission assembly for synchronous oblique stretching treatment; and step four, performing edge material cutting treatment through two cutter assemblies arranged at two ends of the outlet of the synchronous optical oblique stretching equipment. The invention provides a preparation method of a polaroid compensation film for OLED flexible display, which simplifies the production process of the compensation film by limiting the process, and arranges the production of a base film and the production of the compensation film on a continuous production line, so that the utilization of the production field can be maximized, the unnecessary links of material rolling, accumulation and the like in the middle are simplified, and the yield is improved.

Description

Preparation method of polarizer compensation film for OLED flexible display

technical field

The present invention relates to a film processing method. More specifically, the present invention relates to the preparation of a polarizer compensation film for OLED flexible display.

Background technique

The preparation process of polarizer compensation film usually includes base film manufacturing technology and optical compensation film manufacturing technology. In practical applications, base film manufacturing is the basis for polarizing film manufacturing, mainly using COP, PMMA, modified PC and other raw materials. Ingredients and a series of thermal processing and process quality testing, the raw materials are processed into film rolls and supplied to the stretching process to manufacture polarizing films. The manufacturing process flow chart of the base film is shown in Figure 5, and the optical compensation film manufacturing technology is through synchronous biaxial. The realization of the stretching manufacturing process technology is the core technology of the optical compensation film stretching manufacturing (improving the molecular structure arrangement of the film material to achieve special characteristics), while the existing simultaneous biaxial stretching manufacturing process technology can only achieve transverse and longitudinal stretching, As a result, the molecular arrangement structure of the film material cannot meet the manufacturing requirements of optical films for OLED flexible display in the processes of refractive index detection and thickness detection. The existing optical compensation film manufacturing process flow chart is shown in Figure 6.

It can be seen from the above that the two technological processes are both complex and the connection is not good, resulting in complex process operations, which is not conducive to flow production, and the production line is complex and occupies a large area.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION An object of the present invention is to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages that will be described hereinafter.

In order to achieve these objects and other advantages according to the present invention, a preparation method of a polarizer compensation film for OLED flexible display is provided, comprising:

Step 1, the high molecular polymer that constitutes the polarizer compensation film is prepared into pairs of melts by a melting machine;

Step 2, the melt obtained in step 1 is further prepared into a sheet or a thick film through a long and narrow head matched with a melting machine;

In step 3, the sheet or thick film obtained in step 2 is transported to the synchronous optical oblique stretching equipment for synchronous oblique stretching processing through the first transmission assembly;

In step 4, the polarizer compensation film after the stretching treatment is subjected to edge cutting processing by two cutter assemblies arranged at both ends of the outlet of the synchronous optical oblique stretching device;

Step 5, the finished polarizer compensation film after cutting is transported to the side of the winder through the matched second transmission mechanism for winding operation.

Preferably, in step 1, the melting process of the high molecular polymer in the melting machine is configured to include:

S10, each raw material of the high molecular polymer is respectively sucked into the hopper at the front end of the melting machine through the matched first suction mechanism, and each raw material is mixed by the mixing mechanism arranged in the hopper;

S11, the materials that have been mixed and processed by the hopper are transported to the temporary storage hopper through the first feeding pipe which is matched with the discharge end and is inclined in space;

S12, the material in the temporary storage hopper is sucked out by the second suction mechanism, and communicated with the feeding end of the melting machine through the second flat feeding pipe;

S13, the material entering the melting machine is melted and processed through the first preheating section, the first intermediate temperature section, and the first high temperature section and then output.

Preferably, in S10, a controller that cooperates with each first material suction mechanism is further included, and the controller controls the working method of each first material suction mechanism to be configured to include;

S110, the controller receives each raw material ratio input by the user, and switches the suction state of each first material suction mechanism to the input state according to the ratio, and controls the suction flow and rate;

S111, after each first suction mechanism sucks the material, the controller controls each first suction mechanism corresponding to the inclined first baffle on the discharge pipe to be in a closed state, so as to switch the communication state between the discharge pipe and the hopper In order to close and control the second baffle on the discharge pipe to be in an open state, switch the communication state between the discharge pipe and the quantitative hopper to the open state;

S112, the gravity sensor set at the bottom of the quantitative hopper weighs the material for a predetermined time, and sends it back to the controller;

S113, the controller compares the weight ratio received from each gravity sensor with the previous weight ratio, and obtains the suction weight of the raw material for a predetermined time, so as to determine whether the suction amount of each raw material meets the input requirements of the user, if not , then the suction flow and rate of each first suction mechanism are finely adjusted for a second time, and then return to S112 for a second judgment. If satisfied, the controller controls the first baffle to be in an open state, and the discharge pipe and the hopper are in an open state. The communication state is switched to the connected state, the second baffle is controlled to be in the closed state, the communication state of the discharge pipe and the quantitative hopper is switched to the closed state, and the feeding operation is started;

Wherein, a feeding hose is provided on the side of the first material suction mechanism that is matched with the raw material box, and the free end of the feeding hose is provided with a matching inclined surface.

Preferably, in the second step, the outer portion of the elongated handpiece is configured to adopt a double-layer structure, so as to define a space for accommodating the thermal insulation layer therebetween.

Preferably, in step 3, the synchronous optical oblique stretching device is configured to include:

Two annular transmission components arranged oppositely in the shape of a figure of eight;

a housing for encapsulating the annular drive assembly;

The heating roller is arranged inside the casing and is located at the front end of the input of the annular transmission assembly;

Wherein, the inner side wall of the casing is provided with a plurality of groups of heating mechanisms that match the conveying direction of the sheet or thick film, so as to form a matching second preheating section, a second intermediate temperature section, and a second high temperature section inside the casing. part;

And each of the second preheating section, the second medium temperature section, and the second high temperature section are separated by each air duct arranged inside the shell, and each air duct is provided with a matching strip-shaped air outlet to form an interval in space. Using an air curtain, the casing is provided with a third medium temperature section and a low temperature section on the side adjacent to the second high temperature section;

After the second high-temperature section draws out the internal high-heat air through the matched first fan, it flows into the second medium-temperature section after dehumidification treatment;

After the second middle temperature section draws out the inner middle temperature air through the matched second fan, it flows into the second preheating section after dehumidification treatment;

After the second preheating section draws out the internal preheated air through the matching third fan, it flows into the third intermediate temperature section after dehumidification treatment;

The low temperature section cooperates with the fourth fan to cool the stretched sheet or thick film by drawing in the cold air.

Preferably, each annular drive assembly is configured to include:

The transmission section matched with the second preheating section;

At least one annular track matched with the second medium temperature section, the second high temperature section, the third medium temperature section and the low temperature section;

A plurality of drive chain clips for clamping the edges of sheets or thick films, arranged on a circular track;

Wherein, the two ends of the annular track are respectively provided with at least one magnetic sensor matched with the transmission chain clip;

Each magnetic sensor is connected in communication with the control board.

Preferably, the method for performing simultaneous oblique drawing processing by the synchronous optical oblique drawing device is configured to include:

S30, after the sheet or thick film is output from the long and narrow die head, the primary rolling process is performed through the drive rollers in the first drive assembly that are arranged oppositely up and down;

S31, the sheet or thick film after the initial rolling treatment is subjected to the first heating treatment by a heating roller;

S32, the sheet or thick film after the first heat treatment is subjected to a second heat treatment through the second preheating section;

S33, the control motherboard senses the position state of the transmission chain clip through the real-time magnetic sensor, and when it is located at the input end of the annular track, switches the open state to the closed state, so as to input the sheet or thick film subjected to the secondary heat treatment to the first The second medium temperature section;

The control board senses the position state of the transmission chain clip through a real-time magnetic sensor, and when it is located at the output end of the circular track, it switches the closed state to the open state to output the stretched film from the low temperature section;

S34, the control main board is connected in communication with the power input mechanism of each annular track, and by adjusting the output rate of the annular tracks on both sides, the film is stretched and output through the output delay of the annular track at one end, so that the film is stretched during the output delay. During the process, it can be expanded in width based on the arrangement of the circular track, and at the same time stretched obliquely during the expansion process.

Preferably, the annular track is configured to include:

A plurality of independent annular transmission sections matched with the second medium temperature section, the second high temperature section, the third medium temperature section and the low temperature section, the control board independently controls the transmission rate of each annular transmission section as required to ensure that the film It is matched with the oblique stretch ratio of the second middle temperature section and the second high temperature section.

Preferably, in step 4, each cutter assembly is configured to match the position of the transmission chain clip at the outlet end of the synchronous optical oblique stretching device, so as to complete the edge trimming operation of the film before the transmission chain clip is opened.

The present invention includes at least the following beneficial effects: First, the present invention simplifies the production process of the compensation film by limiting the process, and arranges the production of the base film and the production of the compensation film on a continuous production line, so that the production site can be greatly affected. The utilization of materials can be maximized, and the unnecessary material winding and stacking links in the middle are simplified, and the productivity is improved.

Second, the present invention automatically adjusts and controls the equipment so that it can meet precise feeding requirements, reduce the front-end test link, improve product processing efficiency, save raw materials, and reduce waste.

Thirdly, the present invention realizes the stretching in three directions of longitudinal, transverse and oblique directions by adjusting the transmission rates of the annular tracks oppositely arranged in the synchronous optical oblique stretching equipment respectively and segmentally, and in cooperation with the use of the transmission components. The stretching range and angle can be adjusted as required to ensure that the performance indicators of the film meet the needs of use.

Other advantages, objects, and features of the present invention will appear in part from the description that follows, and in part will be appreciated by those skilled in the art from the study and practice of the invention.

Description of drawings

1 is a schematic structural diagram of the cooperation between the front hopper of the melting machine and the temporary storage hopper in an embodiment of the present invention;

2 is a schematic structural diagram of the cooperation of the first suction mechanism with the quantitative bucket and the original box in another embodiment of the present invention;

Figure 3 is a schematic diagram of the layout of the annular track and the heating roller in space;

Fig. 4 is the drawing schematic diagram of film in synchronous optical oblique stretching equipment;

5 is a flow chart of the manufacturing process of the base film in the prior art;

FIG. 6 is a flow chart of a manufacturing process of an optical compensation film in the prior art.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

It should be understood that terms such as "having", "comprising" and "including" as used herein do not assign the presence or addition of one or more other elements or combinations thereof.

It should be noted that, in the description of the present invention, the azimuth or positional relationship indicated by the terms is based on the azimuth or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that A device or element must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "provided with", "sleeve/connection", "connection", etc., should be understood in a broad sense, such as " Connection", which can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

An implementation form of a method for preparing a polarizer compensation film for OLED flexible display according to the present invention includes:

Step 1, the high molecular polymer that constitutes the polarizer compensation film is prepared into pairs of melts by a melting machine;

Step 2, the melt obtained in step 1 is further prepared into a sheet or a thick film through a long and narrow head matched with a melting machine;

In step 3, the sheet or thick film obtained in step 2 is transported through the first transmission assembly to the synchronous optical oblique stretching equipment for simultaneous oblique stretching treatment, and the first transmission assembly simultaneously performs multi-stage calendering during the transmission process. process to reduce the thickness to obtain the corresponding base film, and the base film enters the synchronous optical oblique stretching equipment for synchronous oblique stretching treatment to obtain the corresponding optical compensation film (polarizer compensation film), which is practical in practice. In application, through precise control of temperature and pressure, as well as stretching the base film with specific stretching conditions, optical compensation films with different optical compensation performance requirements are obtained. Of course, in practical applications, the equipment is in During commissioning and trial production, after adjusting the temperature, pressure and specific stretching conditions, it is necessary to perform refractive index detection and thickness detection on the stretched compensation film. packaging operations, etc.;

In step 4, the polarizer compensation film after the stretching treatment is subjected to edge cutting processing by two cutter assemblies arranged at both ends of the outlet of the synchronous optical oblique stretching device;

In step 5, the finished polarizer compensation film after cutting is transported to the side of the winder through the matched second transmission mechanism for winding operation. In this scheme, each step is limited so that it is relatively In terms of the prior art, the process is simpler and the process controllability is better, that is, in practical applications, the prepared optical base film product is subjected to a certain longitudinal, transverse and oblique stretching under certain temperature conditions. The stretching force can change the molecular arrangement structure of the film material. The refractive index detection and thickness detection meet the optical film manufacturing index, and the uniformity of product production is good.

1, in another example, in step 1, the melting process of the high molecular polymer in the melting machine is configured to include:

S10, the raw materials of the high molecular polymer are respectively sucked into the hopper 2 at the front end of the melting machine through the matching first suction mechanism 1, and the raw materials are mixed by the mixing mechanism arranged in the hopper. The material mechanism power mechanism 3 provides power. The stirring shaft 4 has helical blades in space, and a plurality of stirring paddles 5 are arranged in the axial direction. Completely lift up by means of spiral lift;

S11, the material that has been mixed and processed by the hopper is transported to the temporary storage hopper 8 through the first feeding pipe 7 which is matched with the discharge end and is designed to be inclined in space. Of course, the first feeding pipe is provided with a phase The matching solenoid valve is opened after the mixing is completed, and the working state of the first feeding pipe is switched to the open state;

S12, the material in the temporary storage hopper is sucked out by the second suction mechanism, and communicated with the feeding end of the melting machine through the flat second feeding pipe, and the material is fed through the flat structure to ensure that the materials will not pile up together , the working stability of the equipment is better;

S13, the material entering the melting machine is melted and processed in the first preheating section, the first medium temperature section, and the first high temperature section and then output. In this scheme, through the cooperation of the hopper and the temporary storage hopper, the output of the material has a continuous The raw material is processed with the first preheating section, the first medium temperature section and the first high temperature section of the melting machine to ensure that the melting effect of the material meets the needs of use and the melting completeness meets the output performance index.

In another example, in S10, it further includes a controller that cooperates with each first material suction mechanism, and the controller controls the working method of each first material suction mechanism to be configured to include;

S110, the controller receives the ratio of each raw material input by the user, and switches the suction state of each first suction mechanism to the input state according to the ratio, and controls the suction flow and rate, that is, it can be carried out by a metering pump in use. precision control;

S111, as shown in Fig. 2, after each first suction mechanism sucks the material, the controller controls each first suction mechanism to close the inclined first baffle 10 on the discharge pipe 9 to close the discharge pipe. The communication state with the hopper is switched to off, and the second baffle 11 on the discharge pipe is controlled to be in an open state, and the communication state of the discharge pipe and the quantitative hopper 12 is switched to an open state;

S112, after the gravity sensor 13 arranged at the bottom of the quantitative hopper weighs the material for a predetermined time, and sends it back to the controller;

S113, the controller compares the weight ratio received from each gravity sensor with the previous weight ratio, and obtains the suction weight of the raw material for a predetermined time, so as to determine whether the suction amount of each raw material meets the input requirements of the user, if not , then the suction flow and rate of each first suction mechanism are finely adjusted for a second time, and then return to S112 for a second judgment. If satisfied, the controller controls the first baffle to be in an open state, and the discharge pipe and the hopper are in an open state. The communication state is switched to the connected state, the second baffle is controlled to be in the closed state, the communication state of the discharge pipe and the quantitative hopper is switched to the closed state, and the feeding operation is started;

Wherein, a feeding hose 15 is provided on the side of the first suction mechanism that cooperates with the raw material box 14, and the free end of the feeding hose is provided with a matching inclined surface 16, which acts by the inclined surface. Cooperate with the material to ensure that it has a good input effect, and can effectively absorb the material at the bottom of the raw material box. According to the needs of use, the bottom of the raw material box can be equipped with a matching gravity sensor or light sensor to improve the quality of the material. When it is lowered to the predetermined position or the material position is lowered to the specified position, a corresponding notification is sent to feed the raw materials, and the function of the hose is to make it deform accordingly, match the level of the raw materials, and complete the feeding. Operation, in this scheme, through the coordination and limitation of each step and structure, the proportional feeding of each raw material is realized, and through the operation of the quantitative hopper at the front end, it is ensured that within the same working time, the The input flow is matched with the ratio of the raw materials of the polymer to realize the precise control of the material input. Compared with the existing manual manual weighing of materials, the degree of automation is higher.

In another example, in step 2, the outer portion of the elongated handpiece is configured to adopt a double-layer structure, so as to define a space for accommodating the thermal insulation layer therebetween, in this structure, through the elongated The machine head extrudes the molten material. According to the needs, the long and narrow head can extrude the tubular double-layer structure or the flat single-layer structure to meet the needs of different scenarios.

In another example, in step three, the synchronous optical oblique stretching device is configured to include:

As shown in FIG. 3, two annular transmission assemblies 17 are arranged opposite to each other in a figure-of-eight shape, which stretches the sheet or thick film to a predetermined width by adjusting the space ratio;

The casing for encapsulating the annular transmission assembly can be set as a double layer as required, and the middle cavity is provided with a matching thermal insulation layer and/or thermal insulation layer, sound-absorbing and noise-reducing layer;

The heating roller 18, which is arranged inside the casing and is located at the front end of the input of the annular transmission assembly, is used for the first heating pretreatment of the sheet or thick film, or it can be called heat preservation treatment;

Wherein, the inner side wall of the casing is provided with a plurality of groups of heating mechanisms that match the conveying direction of the sheet or thick film, so as to form a matching second preheating section, a second intermediate temperature section, and a second high temperature section inside the casing. In this structure, through the setting of each heating mechanism, the temperature of each position inside the shell is controlled, and according to the need, a matching temperature sensor can be set in each section, so that after the temperature reaches the use requirement , to switch the working state of the heating mechanism, and according to the temperature requirements of different sections, the power of each heating mechanism can be adjusted as needed, and through the cooperation of each section of the fan, the temperature of each section can be raised faster and maintained well. , the warm-up time before the equipment works can be effectively shortened;

And each of the second preheating section, the second medium temperature section, and the second high temperature section are separated by each air duct arranged inside the shell, and each air duct is provided with a matching strip-shaped air outlet to form an interval in space. With an air curtain, the casing is provided with a third medium temperature section and a low temperature section on the side adjacent to the second high temperature section. In this structure, the function of the air duct is to blow up or down through the air outlet on it. The effect of the third intermediate temperature section is to perform intermediate temperature cooling treatment on the film after the second high temperature estimation stretching treatment, while the low temperature section The function of the film is to perform low temperature treatment on the film with medium temperature cooling, and increase the performance index of the film through hot-cold treatment, and at the same time ensure that the output temperature meets the needs of winding, without the need for natural cooling by extending the length of its conveying path;

After the second high-temperature section draws out the internal high-heat air through the matched first fan, it flows into the second medium-temperature section after dehumidification treatment;

After the second middle temperature section draws out the inner middle temperature air through the matched second fan, it flows into the second preheating section after dehumidification treatment;

After the second preheating section draws out the internal preheated air through the matching third fan, it flows into the third intermediate temperature section after dehumidification treatment;

The low temperature section cooperates with the fourth fan to cool the stretched sheet or thick film by drawing in the cold air. It has a number of working areas inside to match the performance indicators of each temperature stage of the sheet or thick film to complete the stretching operation of the sheet or thick film. At the same time, through the cooperation of each fan and the corresponding air duct, the completion The secondary recycling and utilization of temperature at different stages reduces its impact on the environment, and at the same time improves the utilization rate of thermal energy, which has the effect of environmental protection and energy saving. , to ensure that the surface temperature of the film after being stretched and output from the equipment is well controllable, and at the same time adjust the product performance to ensure that it meets the performance requirements of OLED use.

In another example, as shown in FIG. 3, each annular transmission assembly is configured to include:

The transmission section 19 matched with the second preheating section can be preheated and rolled through two designed transmission rollers with heating shafts;

at least one annular track 20 matched with the second middle temperature section, the second high temperature section, the third middle temperature section and the low temperature section;

A plurality of transmission chain clips 21 arranged on the annular track for clamping the edge of the sheet or thick film;

Wherein, at least one magnetic sensor (not shown) matched with the transmission chain clip is respectively provided at both ends of the annular track;

Each magnetic sensor is communicatively connected to the control board. In this structure, the structure of the annular transmission assembly is limited, so that it is preheated through the transmission section, reducing the space ratio of the annular track, and at the same time lifting the sheet Or the processing rate of the thick film in the second intermediate temperature section, the second high temperature section, and the third intermediate temperature section, and the function of the ring track is to circulate the transmission chain clip to the input side and output side of the ring track, that is, in the ring track. On the input side, the transmission chain clamp is controlled to be in working state, and the edge of the sheet or thick film is clamped, and the circular track arranged in a figure of eight can stretch the clamped sheet or thick film laterally in space. , so as to form a more uniform film-like structure, and it is more preferable that the clamping end of the transmission chain clip is provided with an arc part on the side matching the film to prevent it from causing damage to the film, and the transmission chain clip The number and the clamping width are limited, and the edges of the film in transmission are kept in a clamping state to ensure that the stretching effect meets the requirements, and the role of the magnetic sensor (magnetic sensor) is to sense the position of each transmission chain clip, so as to Switch its opening and closing state to ensure that the working state of the transmission chain clip is matched with the transmission of sheets or thick films.

In another example, the method for performing simultaneous oblique drawing processing by the synchronous optical oblique drawing device is configured to include:

S30, after the sheet or thick film is output from the long and narrow die head, the primary rolling process is performed through the drive rollers in the first drive assembly that are arranged oppositely up and down;

S31, the sheet or thick film after the initial rolling treatment is subjected to the first heating treatment by a heating roller;

S32, the sheet or thick film after the first heat treatment is subjected to a second heat treatment through the second preheating section;

S33, the control motherboard senses the position state of the transmission chain clip through the real-time magnetic sensor, and when it is located at the input end of the annular track, switches the open state to the closed state, so as to input the sheet or thick film subjected to the secondary heat treatment to the first The second medium temperature section;

The control board senses the position state of the transmission chain clip through a real-time magnetic sensor, and when it is located at the output end of the circular track, it switches the closed state to the open state to output the stretched film from the low temperature section;

S34, the control main board is connected in communication with the power input mechanism of each annular track, and by adjusting the output rate of the annular tracks on both sides, the film is stretched and output through the output delay of the annular track at one end, so that the film is stretched during the output delay. During the process, it can be expanded in width based on the arrangement and layout of the annular track, and at the same time, it is stretched obliquely during the expansion process. The sheet or thick film introduced into the synchronous optical oblique stretching equipment can go through 4 heating links to ensure that its ductility meets the requirements of use when it is stretched obliquely with a large specific gravity in the second high temperature section. The function of the sensor is to automatically control the clamping and release of the sheet or thick film, so that the sheet or thick film can be stretched laterally at high temperature during the transmission process of the sheet or thick film. The transmission rate of the annular track at both ends is different from the passing rate, so that it has the force of oblique stretching during transverse stretching, and the longitudinal stretching of the film is realized through the transmission of the first transmission component and the second transmission component, so as to realize The stretching effect of the film in three directions is ensured to ensure that the performance indicators of the film meet the requirements of use.

In another example, the annular track is configured to include:

A plurality of independent annular transmission sections matched with the second medium temperature section, the second high temperature section, the third medium temperature section and the low temperature section, the control board independently controls the transmission rate of each annular transmission section as required to ensure that the film In line with the oblique stretch ratio of the second mid-temperature section and the second high-temperature section, in this solution, the structure of the annular track is limited, so that in actual work, the film transfer rate at different positions can be adjusted. It is limited to match the stretching ratio of the film at different positions, that is, in the second preheating section, the transmission ratio of the transmission rollers at both ends is consistent, and its function is to preheat the sheet or thick film to increase its Flexibility to ensure that the effect of the post-stretching treatment can meet the requirements of use, and the speed of the independent annular transmission sections at both ends of the second intermediate temperature section is different, that is, one side transmits fast, and the other side transmits slowly (the speed of the other side is 1/2-3/4), so that the sheet or thick film will produce an oblique stretching force in space to ensure the performance index of the film, and in the second high temperature section, due to the performance of the film in the high temperature section The temperature of the second high temperature section has the highest flexibility, so the speed difference of the independent annular transmission sections at both ends of the second high temperature section is set to be larger, that is, the transmission speed of one side is fast, and the transmission rate of the other side is 1/3-1/2 of the speed of the other side. The difference between the two sides of the transmission will stretch the film in the transmission diagonally, so that the stretching ratio can meet the requirements of use. Specifically, as shown in Figure 4, the present invention makes the difference setting through the working speed of the circular track, so that the film advances Synchronous bidirectional oblique stretching is carried out in the direction of a certain angle, and after special processing such as appropriate cooling or heat treatment, it is made into a film. Synchronous optical oblique stretching technology directly overcomes the shortcomings of the existing optical compensation film technology. Stretching at any angle (0° to 90°), at the same time, it is not easy to produce scratches and scratches, and more raw materials that can be stretched have achieved the improvement of the optical compensation film manufacturing process technology.

In another example, as shown in FIG. 3 , in step 4, each cutter assembly 22 is configured to cooperate with the position of the transmission chain clamp at the outlet end of the synchronous optical oblique stretching device, so as to complete the transmission chain clamp before the transmission chain clamp is opened. For the trimming operation of the film, in this scheme, the clamping part of the transmission chain clip is removed through the operation of the cutter assembly to ensure better uniformity and stability of the film properties after the film rolling operation in the later stage. In actual operation, the cutter assembly can be set as a scissor type with a V-shaped structure, so as to divide the film through the intersections formed in space.

The above solution is only an illustration of a preferred example, but not limited thereto. When implementing the present invention, appropriate substitutions and/or modifications may be made according to user needs.

The number of apparatuses and processing scales described here are intended to simplify the description of the present invention. Applications, modifications and variations to the present invention will be apparent to those skilled in the art.

Although embodiments of the present invention have been disclosed above, they are not limited to the applications set forth in the specification and embodiments. It can be fully adapted to various fields suitable for the present invention. Additional modifications can readily be implemented by those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations herein shown and described, without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (9)

1. A preparation method of a polarizer compensation film for OLED flexible display is characterized by comprising the following steps:

preparing a pair of molten masses from a high molecular polymer forming the polarizer compensation film through a melting machine;

step two, the melt obtained in the step one is further prepared into a sheet or a thick film through a long and narrow machine head matched with a melting machine;

conveying the sheet or the thick film obtained in the step two to synchronous optical oblique stretching equipment through a first transmission assembly for synchronous oblique stretching treatment;

fourthly, performing edge material cutting treatment on the stretched polaroid compensation film through two cutter assemblies arranged at two ends of an outlet of the synchronous optical oblique stretching equipment;

and fifthly, conveying the cut polarizer compensating film finished product to one side of a winding machine through a second transmission mechanism matched with the polarizer compensating film finished product for winding operation.

2. The method for preparing a polarizer compensation film for an OLED flexible display according to claim 1, wherein in the step one, the process of melting the high molecular polymer in a melting machine is configured to include:

s10, sucking the raw materials of the high molecular polymer into a hopper at the front end of a melting machine through a first sucking mechanism matched with the raw materials respectively, and mixing the raw materials through a mixing mechanism arranged in the hopper;

s11, conveying the materials subjected to material mixing processing by the hopper to a temporary storage hopper through a first conveying pipe which is matched with the discharge end and is in an inclined design in space;

s12, sucking the materials in the temporary storage hopper out through a second material sucking mechanism, and communicating the materials with the feeding end of the melting machine through a second feeding pipe in a flat shape;

s13, the material entering the melting machine is output after being melted by the first preheating section, the first middle temperature section and the first high temperature section.

3. The method of preparing a polarizer compensation film for an OLED flexible display according to claim 2, further comprising a controller cooperating with each first suction mechanism in S10, wherein the controller controls an operation method of each first suction mechanism to be configured to include;

s110, the controller receives raw material ratios input by a user, switches the suction state of each first suction mechanism into an input state according to the ratios, and controls the suction flow and the suction speed;

s111, after the first suction mechanisms suck materials, the controller controls the first suction mechanisms to be in a closed state corresponding to the first inclined separation blades on the discharge pipe, so that the communication state of the discharge pipe and the hopper is switched to be closed, controls the second separation blades on the discharge pipe to be in an open state, and switches the communication state of the discharge pipe and the quantitative hopper to be in an open state;

s112, the gravity sensor arranged at the bottom of the quantitative hopper weighs the materials in a preset time and then returns the materials to the controller;

s113, the controller compares the weight ratio received from each gravity sensor with the last weight ratio to obtain the raw material suction weight of preset time to determine whether the suction quantity of each raw material meets the input requirement of a user, if not, the controller secondarily fine-adjusts the suction flow and the suction speed of each first suction mechanism and returns to S112 for secondary judgment, if yes, the controller controls the first blocking piece to be in an open state, the communication state of the discharge pipe and the hopper is switched to be communicated, the second blocking piece is controlled to be in a closed state, the communication state of the discharge pipe and the quantitative hopper is switched to be in a closed state, and feeding operation is started;

one side of the first material suction mechanism, which is matched with the raw material box, is provided with a feeding hose, and the free end of the feeding hose is provided with a matched inclined plane.

4. The method of preparing a polarizer compensation film for an OLED flexible display according to claim 1, wherein in the second step, the exterior of the elongated handpiece is configured to have a double-layered structure to define a space therebetween for accommodating the heat insulating layer.

5. The method for preparing a polarizer compensation film for an OLED flexible display according to claim 1, wherein in step three, the synchronous optical bias stretching apparatus is configured to include:

two annular transmission components which are oppositely arranged in a splayed shape;

a housing for enclosing the endless drive assembly;

the heating roller is arranged in the shell and is positioned at the input front end of the annular transmission assembly;

a plurality of groups of heating mechanisms matched with the sheet or thick film transmission direction are arranged on the inner side wall of the shell, so that a second preheating section, a second middle-temperature section and a second high-temperature section which are matched with each other are formed in the shell;

the second preheating section, the second intermediate temperature section and the second high temperature section are separated by air pipes arranged in the shell, the air pipes are provided with strip-shaped air outlets matched with each other so as to form air curtains for separation in space, and one side of the shell adjacent to the second high temperature section is provided with a third intermediate temperature section and a third low temperature section;

the second high-temperature section extracts high-heat air in the second high-temperature section through a matched first fan, and the high-heat air flows into the second medium-temperature section after dehumidification treatment;

the second medium temperature section extracts internal hot air through a second fan matched with the second medium temperature section, and the internal hot air flows into the second preheating section after dehumidification treatment;

the second preheating section extracts internal preheated air through a matched third fan, and the air flows into the third medium temperature section after dehumidification treatment;

and the low-temperature section is matched with a fourth fan, and the stretched sheet or thick film is cooled by pumped cold air.

6. The method of preparing a polarizer compensation film for an OLED flexible display according to claim 5, wherein each of the ring gear assemblies is configured to include:

the transmission section is matched with the second preheating section;

at least one annular track matched with the second medium-temperature section, the second high-temperature section, the third medium-temperature section and the low-temperature section;

a plurality of drive chain clamps arranged on the annular track and used for clamping the edges of the sheet or the thick film;

wherein, two ends of the annular track are respectively provided with at least one magnetic inductor matched with the transmission chain clamp;

each magnetic inductor is in communication connection with the control main board.

7. The method for preparing a polarizer compensation film for an OLED flexible display according to claim 6, wherein the method for performing the synchronous oblique drawing process by the synchronous optical oblique drawing apparatus is configured to include:

s30, after the sheet or the thick film is output from the long and narrow machine head, primary rolling processing is carried out through the driving rollers which are oppositely arranged in the first driving assembly from top to bottom;

s31, carrying out primary heating treatment on the sheet or the thick film after primary rolling treatment through a heating roller;

s32, carrying out secondary heating treatment on the sheet or the thick film subjected to the primary heating treatment through a second preheating section;

s33, the main board is controlled to sense the position state of the transmission chain clamp through the real-time magnetic sensor, and when the main board is positioned at the input end of the annular track, the opening state is switched into the closing state, so that the sheet or the thick film subjected to secondary heating treatment is input to the second medium temperature section;

the control main board induces the position state of the transmission chain clamp through the real-time magnetic inductor, and when the control main board is positioned at the output end of the annular track, the closed state is switched into the open state so as to output the stretched film from the low-temperature section;

and S34, the control main board is in communication connection with the power input mechanisms of the annular tracks, and the output speed of the annular tracks at two sides is adjusted, so that the film can be unfolded in width based on the arrangement layout of the annular tracks in the stretching process through the output delay of the annular tracks at one end in the stretching output process, and the film is stretched obliquely in the stretching process.

8. The method of preparing a polarizer compensation film for an OLED flexible display according to claim 7, wherein the circular rail is configured to include:

and the control main board is used for independently controlling the transmission rate of each annular transmission section according to requirements so as to ensure that the film is matched with the oblique stretching ratio of the second medium temperature section and the second high temperature section.

9. The method of claim 1, wherein in step four, each cutter assembly is configured to cooperate with the exit end driving chain clamp position of the synchronous optical bias stretching device to complete the edge cutting operation of the film before the driving chain clamp is opened.

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