TWI737317B - Processing apparatus and method for manufacturing optical film - Google Patents

Abstract

A processing apparatus is provided. The processing apparatus includes an optical film processing tank, a fluid guiding structure and an overflow means. The optical film processing tank is configured to contain a processing liquid. The overflow means is used for controlling the flow direction of the processing liquid in the processing apparatus, and includes a case portion, a flow-guiding plate and a drainage pipe connecting the case portion. The flow-guiding plate is movably disposed on at least one side of the case portion so that the height of the flow-guiding plate can be adjusted according to the liquid level of the processing liquid to guide the processing liquid into the case portion. The fluid guiding structure is disposed in the overflow means, and the overflow means is disposed in the optical film processing tank.

Description

Processing device and forming method of optical film

The present disclosure relates to a processing device, and in particular, to a processing device that can reduce the generation of bubbles.

Optical film materials usually need to go through various liquid processing wet processes, but during the process, impurities such as film chips or dust are likely to float in the processing liquid. After reflow, they have a high probability of attaching to the optical film materials. Lead to defects.

The content of this disclosure relates to a processing device. The processing device includes an optical film processing tank, a liquid guiding structure and an overflow device. The optical film processing tank is configured to contain a processing liquid. The overflow device is used in the treatment device to control the flow direction of the treatment liquid in it, including the box body, the drainage plate and the drain pipe. The drain pipe is connected to the box body. The guide plate is movably arranged on at least one side of the box body to adjust the height according to the liquid level of the processing liquid, so that the processing liquid is guided into the box body. The liquid guiding structure is arranged in the overflow device, and the overflow device is arranged in the optical film processing tank.

According to another aspect of the present disclosure, a method for forming an optical film is provided. The method includes the following steps. Carry out the step of transporting the optical film through the above-mentioned processing device. Next, the step of drying the optical film material is performed.

The present disclosure provides a liquid guiding structure, which is arranged between the roller and the overflow device. The liquid guiding structure is configured to guide the cleaning liquid flowing through the roller to avoid the problem of bubbles generated by the cleaning liquid directly dripping onto the processing liquid. Therefore, according to the design of the liquid guiding structure of the present disclosure, the bubbles generated by the cleaning liquid directly dripping onto the processing liquid adsorb impurities and the probability of impurities adhering to the optical film material can be greatly reduced.

In some embodiments, the drain pipe may have a first pipe body, a second pipe body, and a bottom valve seat. When drainage is needed, the second pipe body can be driven to move toward the first pipe body, so that the side opening on the bottom valve seat shielded by the second pipe body is exposed, and the treatment liquid is discharged through the side opening. Based on the structural design of the drainage pipe, the staff only need to pull the second pipe body to perform drainage, instead of removing the box body and the drainage pipe entirely out of the optical film processing tank. Therefore, the design of the present disclosure can reduce the burden on personnel and increase Convenience of drainage.

In order to make the purpose, features, and advantages of the present disclosure more obvious and understandable, the following embodiments are specifically described in detail in conjunction with the accompanying drawings. Among them, the configuration of each element in the embodiment is for illustrative purposes, and is not intended to limit the disclosure. In addition, the repetition of the drawing symbols in the embodiments is to simplify the description, and does not imply the relevance between different embodiments. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit the disclosure.

In addition, the embodiments may use relative terms, such as “lower” or “bottom” and “higher” or “top” to describe the relative relationship between one element of the drawing and another element. It can be understood that if the device in the drawing is turned upside down, the elements described on the "lower" side will become the elements on the "higher" side.

Here, the terms "about" and "approximately" usually mean within 20% of a given value or range, preferably within 10%, and more preferably within 5%. The quantity given here is an approximate quantity, which means that the meaning of "about" and "approximately" can still be implied in the absence of specific instructions.

The content of this disclosure relates to a processing device. In some embodiments, the processing device may include an overflow device, which includes a drainage plate, movably disposed on at least one side of the box body, and the position of the drainage plate can be adjusted with the liquid level of the processing liquid to control The flow direction of the processing liquid and guide it to the box body to filter out impurities and reduce the probability of impurities adhering to the optical film material.

It should be noted that this disclosure does not show all possible embodiments, and other implementation aspects not mentioned in this disclosure may also be applicable. Furthermore, the size ratios in the drawings are not drawn in proportion to the actual products. Therefore, the contents of the description and the drawings are only used to describe the embodiments, rather than to limit the protection scope of the disclosure. In addition, the descriptions in the embodiments, such as detailed structure, process steps, material applications, etc., are for illustrative purposes only, and are not intended to limit the scope of protection of the present disclosure. The details of the steps and structures of the embodiments can be changed and modified according to the needs of the actual application process without departing from the spirit and scope of the present disclosure. In the following description, the same/similar symbols represent the same/similar elements.

Please refer to FIG. 1, which illustrates a schematic diagram of a process equipment for the optical film 100 in some embodiments according to the present disclosure. For example, in the manufacturing process of the optical film material 100, the following steps may be included: swelling treatment, dyeing treatment, stretching treatment, cross-linking treatment, washing treatment, and drying treatment. The optical film material 100 can be guided by a plurality of rollers 160 to sequentially pass through: a swelling tank 110 for swelling treatment, a dyeing tank 120 for dyeing treatment, and a cross-linking tank 130 for cross-linking treatment. Then, the optical film material 100 is transported through the water washing tank 140 to clean the reaction solution adhering to the surface. Afterwards, it is dried by the drying oven 150 to obtain the optical film 100. However, since the optical film material 100 passes through the optical film processing tanks such as the swelling tank 110, the dyeing tank 120, the cross-linking tank 130, and the washing tank 140, impurities such as film chips or dust on the surface or in the process environment are easily brought into In these optical film processing tanks, these impurities may adhere to the surface of the optical film material 100 and affect the optical properties and output quality of the optical film material 100.

In one embodiment, the impurities on the surface of the optical film 100 include optical film scraps, such as polyvinyl alcohol scraps, chemical crystals in a process bath, iron rust scraps, or impurities generated in other process materials or equipment.

In one embodiment, the optical film 100 may be a single-layer or multi-layer film, for example, a polarizer, retardation film, brightness enhancement film, or other optical gain, alignment, compensation, steering, etc. Orthogonal, diffusion, protection, anti-sticking, scratch resistance, anti-glare, reflection suppression, high refractive index and other helpful diaphragms.

In one embodiment, the optical film material 100 may be a polyvinyl alcohol (PVA) resin film, which may be made by saponifying polyvinyl acetate resin. Examples of polyvinyl acetate resins include a single polymer of vinyl acetate, namely polyvinyl acetate, a copolymer of vinyl acetate, and other monomers that can be copolymerized with vinyl acetate. Examples of other monomers that can be copolymerized with vinyl acetate include unsaturated carboxylic acids (e.g. acrylic acid, methacrylic acid, ethyl acrylate, n-propyl acrylate, methyl methacrylate), olefins (e.g. ethylene, propylene, 1 -Butene, 2-methacrylic acid), vinyl ether (e.g. ethyl vinyl ether, methyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether), unsaturated sulfonic acid (e.g. vinyl sulfonic acid, vinyl Sodium sulfonate) and so on.

Please refer to FIG. 2A, which illustrates a schematic diagram of the circulation of the processing liquid 2 in the optical film processing tank 1 of the processing device according to an embodiment of the present disclosure. The optical film processing tank 1 may be one of the above-mentioned swelling tank 110, dyeing tank 120, cross-linking tank 130, and washing tank 140, but the present disclosure is not limited thereto. The processing liquid 2 is stored in the optical film processing tank 1 and may include at least one overflow device 3. For ease of description, in the embodiment, the area where the optical film material (not shown) is immersed in the treatment liquid 2 is defined as a liquid entering area P1, and the area where the optical film material is transferred in the treatment liquid 2 is defined as a transfer area P2 , The area where the optical film material is pulled out of the treatment liquid 2 is defined as a liquid outlet area P3. With the setting of at least one overflow device 3, the flow direction of the treatment liquid 2 can be controlled, and the impurities in the treatment liquid 2 can be filtered out through the overflow device 3 to prevent these impurities from flowing back to the liquid inlet area P1, the transfer area P2 or The liquid exit area P3 adheres to the optical film material. Specifically, the overflow device 3 may include a drainage plate 31 and a drainage pipe 30. The position of the drainage plate 31 can be adjusted with the liquid level of the treatment liquid 2 to guide the treatment liquid 2 containing impurities from the drainage plate 31. It is discharged to the circulation line 101 outside the optical film processing tank 1 through the drain pipe 30. Here, the circulating pipeline 101 may be provided with a purification device 10 to filter out impurities in the treatment liquid 2. Then, the filtered and purified treatment liquid 2 can be recycled back to the optical film treatment tank 1 for use.

Please refer to FIG. 2B, which shows a top view of the optical film processing tank 1 in FIG. 2A. The optical film processing tank 1 may include a first wall 11, a second wall 12, a third wall 13, and a fourth wall 14. The first wall 11 is opposite to the third wall 13, and the second wall 12 is opposite to the fourth wall. 14 relative. In another embodiment, the optical film processing tank 1 can also have other shapes, such as polygonal or circular, etc., and is not limited to the drawing of this embodiment.

In the embodiment, the overflow device 3 can be arranged at different positions in the optical film processing tank 1, and the number is not limited. For example, referring to Figure 2B, the overflow device 3 can be disposed on at least one of the first wall 11, the second wall 12, the third wall 13 and the fourth wall 14 via a supporting base (not shown). On the wall, an overflow device 3 can also be provided on each wall. Furthermore, more than one overflow device 3 can also be provided on each wall. Here, the guide plate 31 can be arranged on the side facing the liquid inlet area P1, the transfer area P2, and the liquid outlet area P3 to remove impurities floating on the liquid inlet area P1, the transfer area P2, or the liquid outlet area P3. It is carried out through the drainage plate 31 and the drain pipe 30 to prevent impurities from flowing back into the liquid inlet area P1, the transfer area P2 or the liquid outlet area P3. In one embodiment, when the overflow device 3 is arranged on the first wall 11 or the third wall 13, the traveling direction of the optical film is substantially perpendicular to the length extension direction of the overflow device 3; when the overflow device 3 is arranged on the second wall For the wall 12 or the fourth wall 14, the traveling direction of the optical film is substantially parallel to the length extension direction of the overflow device 3.

In another embodiment, as shown in FIGS. 3A and 3B, the overflow device 3 may be arranged across the second wall 12 and the fourth wall 14. Specifically, the overflow device 3 is arranged above the transfer area P2, and the guide plates 31 are respectively arranged on two opposite sides facing the liquid inlet area P1 and the liquid outlet area P3, so as to float on the liquid inlet area P1 and the transfer area Impurities above P2 or the liquid outlet area P3 are carried out through the drainage plate 31 and the drain pipe 30. In addition, in an embodiment, one or more overflow devices 3 can also be arranged on at least one of the first wall 11, the second wall 12, the third wall 13, and the fourth wall 14 at the same time. In Figures 3A and 3B, the traveling direction of the optical film is substantially perpendicular to the length extension direction of the overflow device 3, and passes through the treatment liquid below the overflow device 3, as shown in Figure 3A. Here, the longitudinal extension direction of the overflow device 3 is, for example, a direction parallel to the first wall 11 and the third wall 13 in Figure 3B.

Please refer to FIG. 4, which shows a partial exploded view of the optical film processing tank 1 according to an embodiment of the present disclosure. The overflow device 3 further includes a box body 32. The box body 32 is, for example, a five-sided box-like body, and the drain pipe 30 is connected to the box body 32, for example, to the bottom surface of the box body 32. In one embodiment, the box body 32 meets 2≦(ab)/A≦200 and c/a≦0.5, where a is the length of the box body 32, b is the width of the box body 32, and c is the box body. The height of 32, A is the cross-sectional area of the drain pipe 30. Among them, a is not greater than 750cm; b is not greater than 20cm; c is not greater than 150cm; and A is not greater than 300cm ² .

The related configuration of the drainage plate 31 is described in detail below. In the embodiment, the drainage plate 31 is movably arranged on at least one side of the box body portion 32. In this way, the position of the drainage plate 31 can be adjusted with the liquid level of the treatment liquid 2. In the embodiment of FIG. 4, the box portion 32 may have a bottom surface and four side surfaces, wherein the bottom surface is connected to the drain pipe 30, and the drainage plate 31 is disposed on the lower side of the four side surfaces.

In detail, please refer to FIGS. 4 to 5. FIG. 5 is a perspective view of an optical film processing tank 1 according to an embodiment of the present disclosure. The drainage plate 31 can have an opening 310, so a fixing member 320 can be used to pass through the opening 310 to lock the drainage plate 31 on at least one side of the box portion 32. Here, the guide plate 31 is fixed on the lower height of the four side surfaces of the box body portion 32. In one embodiment, the opening 310 is, for example, a long hole, and the long axis of the opening 310 is perpendicular to the liquid surface. Thereby, the height of the drainage plate 31 can be freely adjusted according to the height of the liquid level of the processing liquid 2 so that the processing liquid 2 can smoothly flow into the internal space 3e enclosed by the drainage plate 31 and the box portion 32.

As shown in Fig. 4, the drafting plate 31 may have a undulating structure 31A, and the undulating structure 31A has a highest point 31At and a lowest point 31Ab. When the user adjusts the position of the drainage plate 31, the liquid level of the treatment liquid 2 can be between the highest point 31At and the lowest point 31Ab of the undulating structure 31A. In this way, the treatment liquid 2 can be guided into the internal space 3e, as shown in FIG. 5.

Please refer to FIG. 6A, which shows the shape of the undulating structure 31A. Among them, the shape of the undulating structure 31A is a continuous combination of triangles. The distance between the highest point of the adjacent band of the undulating structure 31A is L, the distance between the highest point 31At and the lowest point 31Ab of the undulating structure 31A is H, and the undulating structure 31A conforms to 0.005≦L/a≦1 and 0.03≦H/c ≦1. Preferably, the undulating structure 31A conforms to 0.01≦L/a≦0.1 and 0.03≦H/c≦0.33, where a is the length of the box body 32 and c is the height of the box body 32.

Although the shape of the undulating structure 31A shown in FIG. 6A is a continuous combination of triangles, the disclosure is not limited thereto. Please refer to FIGS. 6B to 6K, which respectively illustrate different shapes of undulating structures 31B, 31C, 31D, 31E, 31F, 31G, 31H, 31I, 31J, and 31K according to embodiments of the present disclosure. As shown in FIG. 6B, the shape of the undulating structure 31B can be a non-continuous combination of triangles. As shown in Figures 6C, 6D, 6E, and 6F, the undulating structures 31C, 31D, 31E, and 31F may respectively include arcs with different arcs and combinations thereof. As shown in Figures 6G and 6H, the undulating structures 31G and 31H can be continuous and non-continuous combinations of quadrilaterals, for example, the quadrilaterals are trapezoids. As shown in Figures 6I, 6J, and 6K, the undulating structures 31I, 31J, and 31K can be a continuous or discontinuous combination of polygons. For example, the undulating structures 31I and 31J can be a continuous and discontinuous combination of pentagons, respectively. 31K can be a continuous combination of hexagons. Furthermore, the shape of the undulating structure of the present disclosure is not limited to this, and the shape of the undulating structure can also be various combinations of the above-mentioned figures.

In addition, referring to Figure 5, in another embodiment, the overflow device 3 may further include a filter element 4, the filter element 4 is detachably arranged in the box portion 32, for example, arranged in the internal space 3e . The filter element 4 is, for example, a filter mesh. The filter element 4 has a mesh number of 20 to 500 per square inch (unit: mesh), which can preliminarily filter out larger impurities and impurities to further increase the efficiency of filtering impurities, while avoiding large impurities and The impurities cause the drain pipe 30 to be blocked. Furthermore, the number of drain pipes 30 can be more than one, so the number of drain pipes 30 can be increased/decreased according to actual usage conditions.

As shown in Figure 5, since the drain pipe 30 can continuously discharge the processing liquid 2 in the internal space 3e outwards, the liquid level of the processing liquid 2 in the internal space 3e is higher than that of the processing liquid 2 in the optical film processing tank 1. The liquid level is low, and the processing liquid 2 in the internal space 3e will not flow back into the optical film processing tank 1 to prevent the optical film material from adhering to the impurities of the processing liquid 2.

In addition, in an embodiment, the drain pipe 30 is detachably connected to the box portion 32. Referring to FIG. 4, the box body portion 32 may have a through hole 32h. The through hole 32h is, for example, provided on the bottom surface of the box body portion 32, but it is not limited to this. The drain pipe 30 may have an opening 30h, and the opening 30h corresponds to the size of the through hole 32h, for example, it is slightly smaller than the size of the through hole 32h according to the design of tolerances. In this way, the drain pipe 30 can be inserted into the through hole 32h through the opening 30h to be combined with the box portion 32, but the present disclosure is not limited to this combination. In addition, a filter screen (not shown) can also be arranged inside the drain pipe 30 to further filter out impurities and prevent the drain pipe 30 from being blocked. The filter screen has a mesh number of 40~2500 per square inch (unit: mesh). When configured, in order to achieve a better filtering effect, the number of meshes per square inch of the filter mesh is relative to the number of meshes of the filter element 4. More, for example, between 2 to 5 times the number of pores of the filter element 4.

In one embodiment, as shown in FIG. 4, the drain pipe 30 may further include a handle 301. When cleaning is required, the user can disassemble the box body 32 and the drain pipe 30, and can hold the handle 301 to pull the drain pipe 30 out of the optical film processing tank 1 for cleaning, which is convenient for the user to operate and maintain Said overflow device.

The overflow device and optical film treatment tank provided above can control the flow direction of the treatment liquid in the optical film treatment tank to filter out impurities contained in the treatment liquid. The overflow device can be arranged in different positions in the optical film processing tank according to the usage, and the number of the arrangement is not limited. The overflow device includes a guide plate, which is movably arranged on at least one side of the box body. Thereby, the position of the guide plate can be adjusted with the liquid level of the treatment liquid to control the flow direction of the treatment liquid and guide it to the box body to filter out impurities and reduce the probability of impurities adhering to the optical film material.

Please refer to FIG. 7, which is a perspective view of an optical film processing tank 1 according to another embodiment of the present disclosure. In this embodiment, the processing device of the present disclosure may further include a sprinkler module 250 and a liquid guiding structure 200. The sprinkler module 250 is configured to spray a cleaning liquid on a roller 160 to remove impurities or residual processing liquid, to ensure the cleaning of the roller 160 during the manufacturing process, and to avoid affecting the yield of the optical film. In an embodiment, the cleaning liquid may be water, for example, but is not limited thereto. In one embodiment, the length of the sprinkler module 250 is substantially the same as the length of the liquid guiding structure 200, and is configured correspondingly. In one embodiment, the sprinkler module 250 sprays the cleaning liquid from below and/or above the roller.

In one embodiment, the liquid guiding structure 200 is located between the roller 160 and the overflow device 3, and the liquid guiding structure 200 is configured to guide the cleaning liquid from the sprinkler module 250 and flowing through the roller 160. In some embodiments, the liquid guiding structure 200 may be made of stainless steel, but it is not limited thereto.

Please refer to FIGS. 7-9. FIG. 8 is a schematic diagram of an optical film processing tank 1 according to another embodiment of the present disclosure when viewed along the X-axis direction, and FIG. 9 is a schematic diagram of an optical film processing tank 1 according to another embodiment of the present disclosure. A schematic view of the film processing tank 1 viewed along the Y-axis direction. In this embodiment, the liquid guiding structure 200 has a main body 201 and two side wing structures 202. The body 201 defines a long axis direction AX1 and a short axis direction AX2. The long axis direction AX1 is parallel to the X axis, the short axis direction AX2 is parallel to the Y axis, and the long axis direction AX1 is perpendicular to the short axis direction AX2.

As shown in FIG. 8, when viewed along the long axis direction AX1 (X axis), the two side wing structures 202 are connected to opposite sides of the main body 201. In this embodiment, an included angle Ag1 formed between the two side wing structures 202 and a reference plane HL1 (first reference plane) may be 120 degrees to 140 degrees, and the reference plane HL1 may be parallel to the horizontal plane, but is not limited to this. . In addition, an extension connecting member 131 may be provided on the third wall 13, which is configured to be connected to one of the side wing structures 202, for example, by a screw locking connection, so that the liquid guiding structure 200 is suspended on the overflow device 3. In some embodiments, the extension connector 131 can be adjusted so that the position of the liquid guiding structure 200 in the Z-axis direction can be adjusted arbitrarily.

In this embodiment, the length L1 of the side wing structure 202 in the minor axis direction AX2 (Y axis) may be between half the radius (radius/2) and the radius of the roller. In one embodiment, the radius of the roller 160 may be 80 mm (but not limited to this), and the length L1 of the side wing structure 202 in the short axis direction AX2 (Y axis) is between 40 mm and 80 mm. Based on this design, it can be ensured that all the cleaning liquid passing through the roller 160 can fall on the liquid guiding structure 200.

As shown in FIGS. 7 and 9, the main body 201 may be formed with a groove structure having two first guiding inclined surfaces 204 and two second guiding inclined surfaces 206. When viewed along the short axis direction AX2 (Y axis), the two first guiding inclined surfaces 204 are connected to each other, and the two first guiding inclined surfaces 204 are respectively connected to the corresponding second guiding inclined surfaces 206.

In this embodiment, an included angle Ag2 formed between the two first guiding inclined surfaces 204 and a reference plane HL2 (second reference plane) is 160 degrees to 170 degrees, and the two second guiding inclined surfaces 206 are respectively connected to a reference plane HL2 (second reference plane). The angle Ag3 formed between the planes HL3 (the third reference plane) is 90 degrees to 110 degrees. The reference planes HL2 and HL3 may be parallel to the horizontal plane, but are not limited thereto. In one embodiment, a part of the second guiding inclined surface 206 is below the liquid surface of the treatment liquid 2 in the overflow device 3 and is located in the box portion 32 of the overflow device 3. In an embodiment, the liquid guiding structure 200 is in contact with the liquid surface of the processing liquid 2 in the box portion 32. In addition, in an embodiment, the main body 201 may further include a plurality of side barrier walls 2011. The side barrier walls 2011 are arranged on both sides of the second guiding slope 206 to guide the cleaning liquid stably along the second guiding slope. 206 flows into the overflow device 3.

Based on the above structural design, the cleaning liquid guided by the liquid guiding structure 200 can flow into the overflow device 3 along the first guiding inclined surface 204 and the second guiding inclined surface 206 more stably, thereby reducing or reducing direct dripping of the cleaning liquid. The probability of bubbles falling into the treatment liquid.

As shown in Figure 8, when viewed along the long axis direction AX1 (X axis), the ratio of the shortest distance D1 between the roller 160 and the first guide slope 204 to the radius of the roller 160 (D1/Roller radius) Between 3.75 and 6.25. In one embodiment, the shortest distance D1 can be 30-50 cm, and the radius of the roller 160 can be 80 mm. Based on this design, the cleaning liquid dropped by the roller 160 can be made less prone to splashing. Furthermore, the ratio of the shortest distance D2 between the roller 160 and the side wing structure 202 to the radius of the roller 160 (D2/roller radius) is between 1.25 and 2.5. In one embodiment, the shortest distance D2 can be between 10 and 2.5. 20 cm, the radius of the roller 160 can be 80 mm. Based on this design, the range of the liquid guiding structure 200 to guide the cleaning liquid can be increased, and it is easy to install and set without causing collision damage to the roller 160. In addition, the roller 160 has a rotating shaft 160X, and the ratio of a distance D3 between the rotating shaft 160X and the center line CL1 of the liquid guiding structure 200 (or the overflow device 3) in the minor axis direction AX2 (Y axis) to the radius of the roller 160 (D3/Roller radius) is between 0.125~0.5. In one embodiment, the distance D3 is 10-40 mm. The radius of the roller 160 can be 80 mm. Based on this design, the sprinkler module 250 can be used. The sprayed cleaning liquid can be completely guided by the liquid guiding structure 200. Based on the above structural design, the impact of the cleaning liquid falling from the roller 160 to the liquid guiding structure 200 can be reduced, thereby reducing or reducing the probability of bubble generation.

Please refer to FIG. 10, which is a perspective view of a partial structure of an optical film processing tank 1 according to another embodiment of the present disclosure. In some embodiments, the drain pipe 40 may have a first pipe body 41, a second pipe body 42 and a bottom valve seat 44. When draining is required, the second pipe body 42 can be driven to move toward the first pipe body 41 to expose the side opening 445 on the bottom valve seat 44 shielded by the second pipe body 42 so that the treatment liquid 2 is discharged through the side opening 445. Based on the structural design of the drainage pipe 40, the worker only needs to pull the second pipe body 42 to perform drainage, instead of removing the box portion 32 of the overflow device 3 and the drainage pipe 40 entirely out of the optical film processing tank 1. The disclosed design can reduce the burden on personnel and increase the convenience of drainage.

In one embodiment, the first pipe body 41 of the drainage pipe 40 is connected to the bottom surface of the box body portion 32 of the overflow device 3, and the first pipe body 41 is connected to the box body portion 32 so as to be located in the box body portion 32. The liquid can flow into the first tube body 41. In one embodiment, the second tube body 42 is movably connected to the first tube body 41. For example, the tube diameter of the first tube body 41 is slightly larger than the tube diameter of the second tube body 42 so that the second tube body 42 is sleeved in the first pipe 41 in a movable manner, but the present disclosure is not limited to this. The pipe diameter of the second pipe 42 can also be slightly larger than the pipe diameter of the first pipe 41, so that the second The tube body 42 is sleeved outside the first tube body 41 in a movable manner.

In one embodiment, the bottom valve seat 44 is disposed on a drain hole 15 of the optical film processing tank 1. Specifically, the drainage hole 15 is located on a drainage surface 151 of the optical film processing tank 1, and the height of the drainage surface 151 (position in the Z-axis direction) is lower than the bottom surface 16 of the optical film processing tank 1, so as to facilitate the optical film processing tank 1 Drain the treatment liquid 2. The bottom valve seat 44 has a blocking portion 441 and a tubular portion 443, and the first portion 4431 of the tubular portion 443 is disposed on one side (for example, the inner side) of the drain hole 15, and the second portion 4432 of the tubular portion 443 is disposed on the drain On the other side of the hole 15 (for example, the outer side), the blocking portion 441 is disposed between the first portion 4431 and the second portion 4432, and extends radially outward to block liquid from passing between the drain 15 and the tubular portion 443 The gap flows into the drain hole 15. In addition, the second tube body 42 is movably connected to the bottom valve seat 44. For example, the second tube body 42 is sleeved outside the tubular portion 443 of the bottom valve seat 44. However, the present disclosure is not limited to this, and may also be a bottom valve. The tubular portion 443 of the seat 44 is sleeved outside the second tube body 42, and the second portion 4432 of the tubular portion 443 of the bottom valve seat 44 is provided with a plurality of side openings 445. When the optical film processing tank 1 has a discharge processing liquid 2 When required, the second tube body 42 can be moved to expose the side opening 445 to discharge the processing liquid 2 in the optical film processing tank 1.

In an embodiment, the second tube body 42 may have a hook portion 421 configured to be connected to a driving member 60. In one embodiment, the hook portion 421 may be a handle, and the driving member 60 may be a chain, but it is not limited thereto. The driving member 60 can be used to pull the second tube 42 to move along the Z-axis direction.

Please refer to FIG. 10 to FIG. 11. FIG. 11 is a perspective view of the second tube body 42 after moving relative to the first tube body 41 according to an embodiment of the present disclosure. As shown in FIG. 11, when the driving member 60 drives the second tube 42 to move toward the first tube 41 along the Z-axis direction, the side opening 445 shielded by the second tube 42 will be exposed. Then, the processing liquid 2 in the optical film processing tank 1 can flow into the drain hole 15 through the side opening 445 and be discharged to the outside of the optical film processing tank 1.

In addition, a fixing member 50 may be provided on the third wall 13, and the driving member 60 may be fixed on the fixing member 50 so that the treatment liquid 2 can continuously flow into the drain hole 15 through the side opening 445. When the treatment liquid 2 is discharged to the required water level, the driving member 60 can be disengaged and loosened by the fixing member 50. At this time, the second tube 42 will move toward the blocking portion 441 due to gravity to cover the side opening 445, as shown in Figure 10. As shown, so that the treatment liquid 2 is no longer discharged.

The present disclosure provides a liquid guiding structure 200, which is disposed between the roller 160 and the overflow device 3. The liquid guiding structure 200 is configured to guide the cleaning liquid from the sprinkler module 250 and flowing through the roller 160 to prevent the cleaning liquid from dripping directly. Falling to the overflow device 3 and generating bubbles. Therefore, according to the design of the liquid guiding structure 200 of the present disclosure, the bubbles generated by the cleaning liquid directly dripping onto the processing liquid adsorb impurities and the probability of impurities adhering to the optical film material can be greatly reduced.

In addition, in some embodiments, the drain pipe 40 may have a first pipe body 41, a second pipe body 42 and a bottom valve seat 44. When draining is required, the second pipe body 42 can be driven to move toward the first pipe body 41 to expose the side opening 445 on the bottom valve seat 44 shielded by the second pipe body 42 so that the treatment liquid 2 is discharged through the side opening 445. Based on the structural design of the drain pipe 40, the worker only needs to pull the second pipe body 42 to drain the water, instead of removing the box portion 32 and the drain pipe 40 out of the optical film processing tank 1, so the design of the present disclosure can reduce The burden of personnel and increase the convenience of drainage.

Although the embodiments of the present disclosure and their advantages have been disclosed as above, it should be understood that anyone with ordinary knowledge in the relevant technical field can make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure. In addition, the scope of protection of this disclosure is not limited to the manufacturing process, machinery, manufacturing, material composition, device, method, and steps in the specific embodiments described in the specification. Anyone with ordinary knowledge in the technical field can disclose the content from this disclosure. It is understood that the current or future developed processes, machines, manufacturing, material composition, devices, methods, and steps can be used according to the present disclosure as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein. Therefore, the protection scope of the present disclosure includes the above-mentioned manufacturing processes, machines, manufacturing, material composition, devices, methods, and steps. In addition, each patent application scope constitutes an individual embodiment, and the protection scope of the present disclosure also includes each patent application scope and a combination of embodiments.

1: Optical film processing tank

2: Treatment liquid

3: overflow device

3e: internal space

4: filter

10: Purification device

11: The first wall

12: second wall

13: The third wall

131: Extension connector

14: Fourth Wall

15: Drain hole

151: Drainage surface

16: bottom

30: Drain pipe

30h: opening

31: Drainage plate

31A, 31B, 31C, 31D, 31E, 31F, 31G, 31H, 31I, 31J, 31K: undulating structure

31Ab: lowest point

31At: highest point

32: Box body

32h: Through hole

40: Drain pipe

41: The first tube body

42: second tube body

421: Card Hook

44: bottom valve seat

441: Block

443: Tubular section

4431: Part One

4432: second part

445: side opening

50: fixed parts

60: Drive

101: Circulation line

100: Optical film

110: swelling tank

120: Dyeing tank

130: Cross-linking tank

140: washing tank

150: Drying furnace

160: Roller

160X: shaft

301: Handle

310: hole

320: fixed parts

a: length

b: width

c: height

H: The distance between the highest point and the lowest point of the undulating structure

L: The distance between the highest points of adjacent bands of the undulating structure

P1: Liquid entry area

P2: Transfer area

P3: Outlet area

200: Liquid-conducting structure

201: Body

2011: retaining wall

202: Flanking structure

204: The first guide slope

206: The second guide slope

250: Sprinkler module

Ag1: included angle

Ag2: included angle

Ag3: included angle

AX1: Long axis direction

AX2: Minor axis direction

CL1: Centerline

D1: shortest distance

D2: shortest distance

D3: distance

HL1: Reference plane

HL2: Reference plane

HL3: Reference plane

L1: length

X: X axis

Y: Y axis

Z: Z axis

The present disclosure can be clearly understood by the detailed description and the accompanying drawings. It should be emphasized that in accordance with industry standard practices, the various features are not drawn to scale and are used for illustrative purposes only. In fact, in order to be able to explain clearly, the size of various features may be arbitrarily enlarged or reduced. FIG. 1 shows a schematic diagram of a process equipment for optical film materials in some embodiments according to the present disclosure. FIG. 2A is a schematic diagram showing the circulation of the processing liquid in the optical film processing tank of the processing device according to an embodiment of the disclosure. Figure 2B shows a top view of the optical film processing tank of Figure 2A. FIG. 3A is a schematic diagram showing the circulation of the processing liquid in the optical film processing tank of the processing device according to another embodiment of the disclosure. Figure 3B shows a top view of the optical film processing tank of Figure 3A. FIG. 4 is a partial exploded view of an optical film processing tank according to an embodiment of the present disclosure. FIG. 5 is a perspective view of an optical film processing tank according to an embodiment of the disclosure. FIGS. 6A to 6K respectively illustrate undulating structures of different shapes according to some embodiments of the present disclosure. FIG. 7 is a perspective view of an optical film processing tank according to another embodiment of the present disclosure. FIG. 8 is a schematic diagram of an optical film processing tank according to another embodiment of the disclosure viewed along the X-axis direction. FIG. 9 is a schematic diagram of an optical film processing tank according to another embodiment of the present disclosure when viewed along the Y-axis direction. FIG. 10 is a perspective view of a partial structure of an optical film processing tank according to another embodiment of the disclosure. FIG. 11 is a perspective schematic view of the second tube body after moving relative to the first tube body according to another embodiment of the disclosure.

1: Optical film processing tank

2: Treatment liquid

3: overflow device

3e: internal space

12: second wall

13: The third wall

14: Fourth Wall

31: Drainage plate

31Ab: lowest point

31At: highest point

32: Box body

40: Drain pipe

160: Roller

310: hole

320: fixed parts

200: Liquid-conducting structure

201: Body

2011: retaining wall

202: Flanking structure

250: Sprinkler module

AX1: Long axis direction

AX2: Minor axis direction

X: X axis

Y: Y axis

Z: Z axis

Claims (20)

A processing device includes: an optical film processing tank configured to contain a processing liquid; a liquid guiding structure; and an overflow device, including: a box body; a drainage plate, movably arranged on the box body On at least one side of the device, the height of the drainage plate is adjustable; and a drainage pipe connected to the box body; wherein the liquid guiding structure is arranged in the overflow device, and the overflow device is arranged in the Inside the optical film processing tank; wherein a part of the liquid guiding structure intrudes under the liquid surface of the processing liquid in the overflow device. The processing device according to claim 1, wherein the drainage plate has an opening; and/or the drainage plate is fixed on the at least one side of the box body by a fixing member passing through the opening; And/or the opening is an elongated hole. The processing device according to claim 1, further comprising a filter element; the filter element is detachably arranged in the box body; and/or the filter element has a hole number of 20 to 500 per square inch. The processing device according to claim 1, wherein the drainage pipe is detachably connected to the box body portion; and/or the box body portion has a through hole, and the drainage pipe has an opening suitable for being inserted into the through hole. In the hole, the drain pipe is combined with the box body; and/ Or the drain pipe further includes a handle; and/or a filter screen is arranged in the drain pipe, and the filter screen has a mesh number of 40 to 2500 per square inch. The processing device according to claim 1, wherein the drainage plate is movably disposed on two opposite sides of the box body; and/or the drainage plate has a structure that is raised and lowered, wherein the shape of the undulating structure is an arc , Triangle, trapezoid, polygon or a combination of the above figures. The processing device according to claim 5, wherein the undulating structure meets 0.005≦L/a≦1 and 0.03≦H/c≦1, where L is the distance between the highest points of adjacent bands of the undulating structure, H Is the distance between the highest point and the lowest point of the undulating structure, a is the length of the box body, and c is the height of the box body. The processing device according to claim 1, wherein the box body conforms to 2≦(ab)/A≦200 and c/a≦0.5, where a is the length of the box body and b is the width of the box body , C is the height of the box body, A is the cross-sectional area of the drainage pipe; and/or a is not greater than 750cm, b is not greater than 20cm, and c is not greater than 150cm; A is not greater than 300cm ² . The processing device according to claim 1, wherein the optical film processing tank further includes a first wall, a second wall, a third wall, and a fourth wall, the first wall is opposite to the third wall, and the The second wall is opposite to the fourth wall; wherein the at least one overflow device is disposed on at least one of the first wall, the second wall, the third wall, and the fourth wall; and/or the optical The film treatment tank is a swelling tank, a dyeing tank, a cross-linking tank, and/or a water washing tank. The processing device according to claim 1, wherein the processing device further includes a sprinkler module and a roller, and the sprinkler module is configured to spray a cleaning on the roller Liquid, the liquid guiding structure is located between the roller and the overflow device, and the liquid guiding structure is configured to guide the cleaning liquid flowing through the roller. The processing device according to claim 9, wherein the liquid guiding structure has a body and two side wings structure, the body defines a long axis direction, and when viewed along the long axis direction, the two side wings structure is connected to the body And/or the angle between the two side wing structures and a first reference plane is 120 degrees to 140 degrees. The processing device according to claim 10, wherein the body further defines a short axis direction, the long axis direction is perpendicular to the short axis direction, and the length of the two side wing structures in the short axis direction is between the radius of the roller Between half of and the radius. The processing device according to claim 10, wherein the body has two first guiding slopes and two second guiding slopes, the body further defines a short axis direction, the long axis direction is perpendicular to the short axis direction, and when When viewed along the short axis direction, the two first guiding slopes are connected to each other, and the two first guiding slopes are respectively connected to the corresponding second guiding slopes. The processing device according to claim 12, wherein the included angle between the two first guiding slopes and a second reference plane is 160 degrees to 170 degrees; and/or the two second guiding slopes are respectively opposite to a first The angle between the three reference planes is 90 degrees to 110 degrees. The processing device according to claim 12, wherein a part of the two second guiding slopes is below the liquid surface of the treatment liquid in the overflow device; and/or the part of the two second guiding slopes is Located in the box body. The processing device according to claim 12, wherein when along the long axis When viewed from the direction, the ratio of the shortest distance between the roller and the two first guide slopes to the radius of the roller is between 3.75 and 6.25, and/or the distance between the roller and the two side wing structures is between 3.75 and 6.25. The ratio of a shortest distance to the radius of the roller is between 1.25 and 2.5; and/or the roller has a rotating shaft, and the rotating shaft and the liquid guiding structure or the center line of the overflow device are in the short axis direction The ratio of a distance to the radius of the roller is between 0.125 and 0.5. The processing device according to claim 1, wherein the drainage pipe has a first pipe body, a second pipe body, and a bottom valve seat, the first pipe body is connected to a bottom surface of the box portion, and the first pipe body Two pipe bodies are movably connected to the first pipe body, wherein the bottom valve seat is arranged on a drain hole of the optical film processing tank, and the second pipe body is movably connected to the bottom valve seat. The processing device according to claim 16, wherein the second tube body has a hook portion configured to be connected to a driving member, the bottom valve seat has at least one side opening, and when the driving member drives the second tube When the body moves toward the first tube body, the at least one side opening is exposed by the second tube body. The processing device according to claim 16, wherein the bottom valve seat includes a blocking portion and a tubular portion, a first portion of the tubular portion is disposed on one side of the drain hole, and a second portion of the tubular portion is disposed on The other side of the drainage hole, and the blocking part is arranged between the first part and the second part and extends radially outward. A method for forming an optical film material, comprising: conveying an optical film material through the processing device as described in items 1 to 18 of the request; and Dry the optical film material. The method for forming an optical film according to claim 19, wherein the optical film is a polyvinyl alcohol resin film; and/or the traveling direction of the optical film is substantially perpendicular to the length extension direction of the overflow device; And/or the optical film material passes through the treatment liquid below the overflow device.

Images