TW202103801A - Optical film processing apparatus - Google Patents

Abstract

An optical film processing apparatus is provided. The optical film processing apparatus includes a transporting system, a processing bath, and a liquid conducting roller. The transporting system supports and transports an optical film. The optical film is transported passing the processing bath, so that a liquid is remained on the surface of the optical film. The liquid conducting roller has a contact surface that contacts the surface of the optical film. The contact surface has a micron-sized roughened structure.

Description

Optical film process equipment

The content of this disclosure relates to an optical film manufacturing equipment, in particular to an optical film manufacturing equipment with a liquid guide roller.

In the optical film manufacturing process, it is often necessary to immerse the optical film in various process baths for dyeing and cross-linking process, surface treatment process or water washing process, and then the surface of the optical film is cleaned and dried before rewinding the optical film. However, after the optical film is processed in the process bath, it is possible that a large amount of processing liquid or cleaning liquid remains on the optical film, which will cause the subsequent drying process to be time-consuming or consume high energy, and the weight of the liquid may also cause the optical film to wrinkle. Folding, in turn, has an adverse effect on the optical properties of the optical film.

The content of this disclosure relates to an optical film manufacturing process equipment. In the embodiment, the liquid guide roller of the optical film processing equipment contacts the surface of the optical film with a micron-level roughened structure of the contact surface, so that the contact method between the liquid guide roller and the optical film is converted from traditional surface contact to point contact. Appropriately reduce the contact area between the liquid guide roller and the optical film, thereby reducing the frictional resistance between the liquid guide roller and the surface of the optical film, reducing the probability of breaking or scratching the optical film, thereby improving the manufacturing process of the optical film Yield and quality.

According to an embodiment of the present disclosure, an optical film manufacturing equipment is provided. The optical film processing equipment includes a conveying system, a processing bath, and a liquid guide roller. The conveying system is used to carry and convey the optical film. The optical film is transported through the process bath, leaving liquid on the surface of the optical film. The liquid guide roller contacts the surface of the optical film with the contact surface. The contact surface has a micron-level roughened structure.

In the embodiment of the present disclosure, the liquid guide roller of the optical film manufacturing equipment contacts the surface of the optical film with a micron-level roughened structure of the contact surface, so that the contact method between the liquid guide roller and the optical film is changed from the traditional surface contact to Point contact, which appropriately reduces the contact area between the liquid guide roller and the optical film, thereby reducing the frictional resistance between the liquid guide roller and the surface of the optical film, reducing the probability of breaking or scratching the optical film, thereby increasing Process yield and quality of optical film.

Various implementation methods or examples are presented below to implement the different features of the present disclosure, in which specific elements and their arrangement are described to illustrate the present disclosure. Of course, these are only examples and should not be used to limit the scope of the present disclosure. For example, when the description mentions that the first element is formed on the second element, it may include an embodiment in which the first element is in direct contact with the second element, or it may include other elements formed on the first element. The embodiment with the second element, where the first element and the second element are not in direct contact. In different embodiments and drawings, the same or similar component symbols are used to represent the same or similar components, but these same or similar component symbols are only used to describe the content of the disclosure simply and clearly, and do not represent the differences discussed. There is a specific relationship between the embodiments and/or structures. It is worth noting that the embodiments are only used to illustrate the technical features of the disclosure, and are not used to limit the scope of patent application of the disclosure. Those with ordinary knowledge in the technical field will be able to make equal modifications and changes based on the following description without departing from the spirit of the present disclosure. In some embodiments, some elements are omitted from the drawings to clearly show the technical features of the disclosure.

In addition, terms related to space may be used, such as "below", "below", "above", "between" and similar terms. These terms are related to It is convenient to describe the relationship between one element(s) or feature and another element(s) or feature in the diagram. These spatial relation words include the different orientations of the device in use or operation, as well as the orientation described in the diagram . The device may be turned to different orientations (rotated by 90 degrees or other orientations), and the space-related adjectives used therein can also be interpreted in the same way. It should be understood that additional process steps may be included before, during, or after some process steps, and some process steps described in some embodiments may be replaced by other process steps in the method of other embodiments. Or delete.

FIG. 1 shows a schematic diagram of an optical film manufacturing equipment 1 and an optical film manufacturing process using the equipment according to an embodiment of the present disclosure. In the present disclosure, the optical film 100 may be a single-layer or multi-layer optical film, such as a polarizing film, a retardation film, a brightness enhancement film, or a protective film; or, the optical film 100 may be an optical laminate formed by multiple optical films For example, it may include a polarizing film and a protective film formed thereon; or, the optical film 100 may also include optical gain, alignment, compensation, steering, orthogonality, diffusion, protection, anti-sticking, scratch resistance, anti-glare, and reflection suppression , High refractive index and other helpful films. In the embodiment of the present disclosure, the optical film 100 is, for example, a continuous roll of material.

In some embodiments, the optical film 100 is, for example, a polarizing film, and the material of the polarizing film can be a polyvinyl alcohol (PVA) resin film, which can be made by saponifying polyvinyl acetate resin. Examples of polyvinyl acetate resins include a single polymer of vinyl acetate, that is, polyvinyl acetate, a copolymer of vinyl acetate, and other monomers that can be copolymerized with vinyl acetate.

In some embodiments, the optical film 100 is, for example, a protective film, and the protective film may have a single-layer or multi-layer structure. The material of the protective film may be, for example, a thermoplastic resin with excellent transparency, mechanical strength, thermal stability, and moisture barrier properties. Thermoplastic resins may include cellulose resins (e.g., triacetate cellulose (TAC), diacetate cellulose (DAC)), acrylic resins (e.g., poly(methyl methacrylate) ), PMMA), polyester resin (for example, polyethylene terephthalate (PET), polyethylene naphthalate), olefin resin, polycarbonate resin, cycloolefin resin, oriented stretch Oriented-polypropylene (OPP), polyethylene (PE), polypropylene (PP), cyclic olefin polymer (COP), cyclic olefin copolymer (COC) ), or any combination of the above. In addition, the material of the protective film can also be, for example, (meth)acrylic, urethane, acrylic urethane, epoxy, or silicone It is a thermosetting resin or ultraviolet-curing resin. In addition, the above-mentioned protective film may be further subjected to surface treatment, for example, anti-glare treatment, anti-reflection treatment, hard coating treatment, electrification prevention treatment, or anti-fouling treatment.

In the embodiment, as shown in FIG. 1, the optical film processing equipment 1 includes a conveying system 10, a processing bath 50, and a liquid guide roller 30. The conveying system 10 includes at least one roller for carrying and conveying the optical film 100. The optical film 100 passes through the process bath 50 through the conveying system 10, and the liquid from the process bath 50 is left on the surface 100 a of the optical film 100. The liquid guide roller 30 contacts the surface 100 a of the optical film 100 with a contact surface. The contact surface has a micron-level roughened structure 200. In some embodiments, the liquid can flow from the surface 100 a of the optical film 100 to the two sides of the optical film 100 along the contact surface to lead out the optical film 100.

A common practice in the industry is to wipe off the liquid on the optical film by means of a water removal device in a full-surface contact manner. However, when the thickness of the optical film is relatively thin, the surface contact wiper action is in contact with the optical film. The area is quite large, so the frictional resistance generated can easily cause the optical film to break or scratch. In contrast, according to the embodiment of the present disclosure, the liquid guide roller 30 contacts the surface 100a of the optical film 100 with the micron-level roughened structure 200 contacting the surface to lead the liquid out of the optical film 100, so that the liquid guide roller 30 is in contact with the optical film 100. The contact mode of the film 100 is converted from traditional surface contact to point contact, which appropriately reduces the contact area between the liquid guide roller 30 and the optical film 100, thus reducing the gap between the liquid guide roller 30 and the surface 100a of the optical film 100. The frictional resistance reduces the probability of breaking or scratching of the optical film 100, thereby improving the process yield and quality of the optical film 100.

In some embodiments, the liquid guide roller 30 can also provide the function of supporting force and direction guidance of the optical film 100 during transmission. With the design of the embodiment of the present disclosure, the liquid guide roller 30 can contact the surface with a micron roughness. The chemical structure 200 contacts the surface 100a of the optical film 100, which can reduce the frictional resistance between the liquid guide roller 30 and the surface 100a of the optical film 100, reduce the probability of breakage or scratches of the optical film 100, thereby improving the manufacturing process of the optical film 100 Yield and quality. In some embodiments, with the design of the embodiment of the present disclosure, the transmission speed of the optical film 100 can be increased to increase the productivity per unit time.

In some embodiments, as shown in FIG. 1, along the conveying direction DR1 of the optical film 100, the liquid guide roller 30 is arranged behind the process bath 50 of the optical film process equipment 1.

In some embodiments, the process bath 50 may be a liquid tank required in the process of the optical film 100, such as a saponification tank, a swelling tank, a dyeing tank, a cross-linking tank, or a washing tank. In some embodiments, the optical film 100 is, for example, a polyvinyl alcohol (PVA) film that has been dyed (for example, adding iodine or dichroic dyes, etc.). The optical film 100 may pass through the process bath 50 along the conveying direction DR1, in which After the dyeing and cross-linking process, the surface treatment process, or the water washing process, the liquid remaining on the surface 100a of the optical film 100 is, for example, a treatment liquid, such as dye, trace element boron, iodine, potassium, sulfur, or used for saponification. The alkaline liquid, etc., and/or washing liquid. Next, the optical film 100 is transported to the liquid guide roller 30 to lead the liquid out of the optical film 100. As shown in FIG. 1, the liquid contacts the liquid guide roller 30 along the flow direction D1, and is then led out of the optical film 100.

When the optical film 100 passes through the process bath 50 and leaves the process bath 50, a relatively large amount of liquid will be brought out and remain on the surface 100a of the optical film 100, and these liquids are not intended to be completely removed by a single device or component. Remove. According to the embodiment of the present disclosure, the liquid guide roller 30 with the micron-level roughening structure 200 can remove about 80~90% of the residual liquid from the process bath 50, and then only the remaining 10~20% of the liquid needs to be The subsequent dewatering device and/or drying device are then completely removed. In this way, the liquid guide roller 30 can remove most of the remaining liquid while ensuring that the optical film 100 is not damaged, which is conducive to making the subsequent water removal and/or drying steps can be performed more quickly and effectively Therefore, it is possible to effectively and completely remove the residual liquid while maintaining the good quality of the optical film 100.

In some embodiments, the material of the liquid guide roller 30 may include stainless steel, titanium alloy, and/or acrylic, and a micron-level roughened structure may be formed by a water jet cutting process, a laser process, and/or an etching process. 200.

In some embodiments, as shown in FIG. 1, the micron-level roughened structure 200 may have a plurality of recesses, which are recessed from the top of the micron-level roughened structure 200 to the inside. A number of different embodiments regarding the shapes and sizes of the recesses will be described in detail later in the text in conjunction with the accompanying drawings. It should be noted that the shape and size of the recesses in the embodiments of the present disclosure can have various designs according to actual needs, and are not limited to the specific embodiments described herein.

In some embodiments, as shown in FIG. 1, the top of the micron-level roughening structure 200 directly contacts the surface 100 a of the optical film 100, and the concave portion of the micron-level roughening structure 200 does not contact the surface 100 a of the optical film 100.

According to some embodiments of the present disclosure, the concave portion does not touch the surface 100a of the optical film 100, and only the top of the micron-level roughening structure 200 directly touches the surface 100a of the optical film 100, so that the reduction of the liquid guide roller 30 and the surface 100a The effect of the contact area of the optical film 100 can reduce the frictional resistance between the liquid guide roller 30 and the surface 100a of the optical film 100, thereby reducing the probability of breakage or scratching of the optical film 100, thereby improving the manufacturing process of the optical film 100 Yield and quality.

In some embodiments, as shown in Figure 1, the liquid guide roller 30 is, for example, a fixed roller, that is, the liquid guide roller 30 does not rotate. In this way, according to the embodiment of the present disclosure, as shown in Figure 1, the liquid guide roller 30 can only contact the surface 100a of the optical film 100 with a partial area of the entire surface, so that the contact with the micron-level roughened structure 200 The surface can only occupy a partial area of the entire surface of the liquid guide roller 30, that is, only the micron-level roughening structure 200 needs to be fabricated in a predetermined local area of the liquid guide roller 30, which has the advantage of saving manufacturing costs. . In some embodiments, the area of the contact surface may only occupy 20-60% of the surface area of the entire surface area of the liquid guide roller 30.

In some embodiments, the material of the liquid guide roller 30 may include, for example, stainless steel, titanium alloy, or hard acrylic. Stainless steel is, for example, SUS304, SUS304L, SUS309, SUS309S, SUS310S, SUS311, SUS314, SUS321, SUS345, SUS348, SUS403, SUS410, SUS405, SUS406, SUS410, SUS414, SUS430, SUS330F, SUS431, SUS440A~C, SUS442, SUS443, SUS446 , SUS447JI, SUS630, SUS JIS 35, SUS XM 27, SHOMAC30-2, SEA-CURE, HR-8N, SUS 316, SUS 316L, SUS 317, SUS 317L, SUS 316J1, SUS 316J2, CARPENTER 20 or MONIT.

In some embodiments, as shown in Figure 1, the outer diameter d1 of the liquid guide roller 30 is, for example, 50 to 300 microns.

In some embodiments, as shown in Figure 1, the liquid guide roller 30 not only contacts the surface 100a of the optical film 100, but also advances about 1 to 5 cm (10 to 50 mm) in the direction D2 perpendicular to the surface 100a. The contact surface angle α is formed between the liquid guide roller 30 and the surface 100a of the optical film 100. The contact surface angle α is, for example, 3 to 45 degrees, which increases the distance between the liquid guide roller 30 and the surface 100a of the optical film 100. The contact area of the optical film 100 makes it more difficult for the liquid to pass through the contact area between the liquid guide roller 30 and the surface 100a of the optical film 100, which helps to improve the drainage of the liquid from the surface 100a of the optical film 100 by the liquid guide roller 30 Effect.

In some embodiments, as shown in FIG. 1, the area covered by the contact surface angle α and the area covered by the micron-level roughening structure 200 of the contact surface of the liquid guide roller 30 substantially overlap, and the micron-level roughening structure 200 is The area covered is larger than the area covered by the contact surface angle α. In this way, the liquid guide roller 30 can completely contact the surface 100a of the optical film 100 with the micron-level roughening structure 200, which can more effectively reduce the friction between the liquid guide roller 30 and the surface 100a of the optical film 100 The resistance effect further improves the process yield and quality of the optical film.

In some embodiments, the average roughness (Ra) of the contact surface of the liquid guide roller 30 is, for example, 5 to 80 microns. According to some embodiments of the present disclosure, if the average roughness (Ra) of the contact surface is greater than 80 microns, there may be doubts that the effect of blocking liquids may be reduced, and the roughness may be too large to cause damage to the optical film 100. On the other hand, if the average roughness (Ra) of the contact surface is less than 5 microns, the contact area between the liquid guide roller 30 and the optical film 100 cannot be effectively reduced. In other words, according to some embodiments of the present disclosure, when the average roughness (Ra) of the contact surface of the liquid guide roller 30 is between 5 and 80 microns, it is better to simultaneously reduce the damage of the optical film 100 and provide Good resistance to liquid.

As shown in Figure 1, the optical film processing equipment 1 may further include a liquid removing device 60 and a drying chamber 40. The optical film 100 is sequentially passed through the process bath 50, the liquid guide roller 30, and the liquid removing device along the conveying direction DR1 by the conveying system 10 Liquid device 60 and drying chamber 40.

In some embodiments, the liquid removing device 60 is used to further remove the remaining liquid on the surface 100 a of the optical film 100. As shown in Figure 1, in the embodiment, the liquid removing device 60 may include a pressing roller set 610, which includes a first roller 611 and a second roller 613 arranged oppositely to allow the optical film 100 to pass through The first roller 611 and the second roller 613 are squeezed to remove liquid. In some embodiments, the liquid removing device 60 is arranged immediately after the liquid guide roller 30 in the conveying direction DR1, and the remaining 10-20% of the remaining liquid from the process bath 50 on the surface 100a of the optical film 100 is completely removed. Remove.

In some embodiments, the liquid removing device 60 can also be used to further remove foreign objects dropped from the optical film 100. As shown in Figure 1, in the embodiment, the liquid removing device 60 may further optionally include spray washing devices 620 and 630, and the spray washing device 620 and the spray washing device 630 are respectively adjacent to the first roller 611 and the second roller. The wheels 613 are provided, and a cleaning liquid, such as water, is sprayed respectively, to clean foreign matter and residual liquid on the surfaces of the first roller 611 and the second roller 613.

In some embodiments, the drying chamber 40 is used to dry the optical film 100 after removing liquid (for example, a treatment liquid and/or a washing liquid). In some embodiments, the drying chamber 40 is, for example, an oven, but not limited to this.

In some embodiments, as shown in Figure 1, the optical film manufacturing equipment 1 may further include another guide roller 31. The design of the guide roller 31 is basically the same as that of the guide roller 30. Go into details. As shown in Figure 1, the liquid sprayed by the spray washing device 630 is likely to flow downward in the direction opposite to the conveying direction DR1, and the liquid guide roller 31 is arranged under the spray washing device 630 and contacts the surface 100a of the optical film 100 , The liquid guide roller 31 can effectively remove most of the liquid from the surface 100a of the optical film 100, and at the same time, it can also prevent the liquid from the spray cleaning device 630 from improperly accumulating on the rollers below, which will damage the optical film 100. The quality of the product has a negative impact.

FIG. 2 shows a schematic diagram of an optical film manufacturing equipment and an optical film manufacturing process using the equipment according to another embodiment of the present disclosure. In this embodiment, the same or similar component numbers are used for the same or similar component numbers as in the previous embodiment, and the related description of the same or similar components please refer to the foregoing description, which will not be repeated here.

In some embodiments, as shown in FIG. 2, the optical film processing equipment 2 may include a conveying system 10, a processing bath 50, a liquid guide roller 30', and a liquid spray device 20. The liquid spray device 20 can spray liquid onto the surface 100 a of the optical film 100.

In some embodiments, as shown in Figure 2, the entire surface of the liquid guiding roller 30' has a micron-level roughened structure 200', so the entire surface of the liquid guiding roller 30' can be used as a contact surface. In this way, according to some embodiments of the present disclosure, the liquid guide roller 30' can be arbitrarily set as a fixed roller or a rotating roller according to the design and process requirements of the optical film process equipment, which improves the process equipment Design and use flexibility.

In some embodiments, as shown in Figure 2, the liquid guide roller 30' having a micron-level roughening structure 200' on the entire surface is, for example, a rotating roller. For example, in some embodiments, the liquid guide roller 30' is, for example, a driving wheel, and rotates in a direction opposite to the conveying direction DR1 of the optical film 100 on the contact surface with the surface 100a of the optical film 100, so it can Improve the effect of liquid blocking and liquid guiding; in some other embodiments, the liquid guiding roller 30' is, for example, a driving wheel, and on the contact surface with the surface 100a of the optical film 100 in the direction of transport DR1 of the optical film 100 Rotate in the same direction.

In some embodiments, as shown in FIG. 2, along the conveying direction DR1 of the optical film 100, the liquid spraying device 20 is arranged behind the processing bath 50 of the optical film processing equipment 2, and the liquid spraying device 20 is arranged on the optical film processing equipment 2 before the liquid guide roller 30'. In some embodiments, the liquid spray device 20 can be used to adjust the optical characteristics of the optical film 100, and/or to wash away the remaining liquid on the surface 100a of the optical film 100. The remaining liquid is, for example, the processing liquid from the process bath 50. For example, dyes, trace elements boron, iodine, potassium, sulfur or alkaline liquids for saponification, etc., and/or washing liquids.

In some embodiments, as shown in FIG. 2, the optical film processing equipment 2 may further include a spray cleaning device 70 for cleaning foreign objects on the rollers of the conveying system 10.

As shown in Figure 2, taking the gravity direction G as the spatial downward direction, the liquid sprayed by the liquid spray device 20 is likely to flow downward in the conveying direction DR1, and the liquid guide roller 30' is arranged on the liquid spray device 20 The surface 100a of the optical film 100 under the spraying device 70 and in contact with the surface 100a of the optical film 100 can be effectively removed from the surface 100a of the optical film 100 by the liquid guide roller 30', thereby avoiding the liquid spraying device 20 and the surface 100a of the optical film 100. The liquid of the device 70 improperly accumulates at the rollers below, thereby preventing the quality of the optical film from being adversely affected.

As shown in Figure 2, in the embodiment, the optical film manufacturing equipment 2 may include three liquid spraying devices 20, the liquid spraying device 20 can spray water, and the three liquid spraying devices 20 are respectively arranged at different positions and have different water. The temperature, through the matching design of the appropriate setting position and the water temperature, can make the color hue of the entire width of the optical film 100 more uniform.

FIG. 3 is a perspective view of a liquid guide roller 30A according to an embodiment of the present disclosure. In this embodiment, the same or similar component numbers are used for the same or similar component numbers as in the previous embodiment, and the related description of the same or similar components please refer to the foregoing description, which will not be repeated here.

In some embodiments, as shown in Figure 3, the liquid guide roller 30A is, for example, a fixed roller. The liquid guide roller 30A includes a fixed shaft 230 and a roller body 240. The fixed shaft 230 is fixedly connected to the roller. Main body 240. In some embodiments, as shown in FIG. 3, the contact surface with the micron-level roughening structure 200A may only occupy a partial area of the entire surface of the roller body 240, but the present disclosure is not limited to this.

In some embodiments, as shown in FIG. 3, the micron-level roughening structure 200A of the liquid guiding roller 30A has a plurality of recesses 210A, and the recesses 210A are recessed from the top 220A of the micron-level roughening structure 200A inward. In some embodiments, during the manufacturing process of the optical film 100, when the liquid guiding roller 30A contacts the surface 100a of the optical film 100 with a contact surface, the top 220A of the micron-level roughening structure 200A directly contacts the surface 100a of the optical film 100, The concave portion 210A of the micron-level roughening structure 200A does not touch the surface 100 a of the optical film 100.

In some embodiments, the material of the liquid guide roller 30A may include stainless steel, titanium alloy, and/or acrylic, and the concave portion may be formed by a sandblasting process, a waterjet cutting process, a laser process, and/or an etching process. 210A is formed on the surface of the roller body 240. In some embodiments, for example, the recess 210A having a micrometer size may be formed on the surface of the roller body 240 made of stainless steel and/or titanium alloy.

In some embodiments, the inner diameter of the recess 210A is, for example, equal to or less than 80 microns. In some embodiments, the inner diameter of the recess 210A is, for example, between 5 and 80 microns. In some embodiments, the inner diameter of the recess 210A is, for example, between 10 and 50 microns. In some embodiments, the inner diameter sizes of the plurality of recesses 210A may be the same or different from each other.

According to some embodiments of the present disclosure, only the top 220A of the micron-level roughening structure 200A directly contacts the surface 100a of the optical film 100, so the effect of reducing the contact area between the liquid guide roller 30A and the optical film 100 can be effectively achieved, thus The frictional resistance between the liquid guide roller 30A and the surface 100a of the optical film 100 is reduced, thereby reducing the probability of breakage or scratching of the optical film 100, thereby improving the process yield and quality of the optical film.

FIG. 4 is a three-dimensional schematic diagram of a liquid guide roller 30B according to another embodiment of the present disclosure. In this embodiment, the same or similar component numbers are used for the same or similar component numbers as in the previous embodiment, and the related description of the same or similar components please refer to the foregoing description, which will not be repeated here.

In some embodiments, as shown in Figure 4, the liquid guide roller 30B is, for example, a fixed roller. The liquid guide roller 30B includes a fixed shaft 230 and a roller body 240. The fixed shaft 230 is fixedly connected to the roller. Main body 240. In some embodiments, as shown in FIG. 4, the contact surface with the micron-level roughened structure 200B may only occupy a partial area of the entire surface of the roller body 240, but the present disclosure is not limited to this.

In some embodiments, as shown in FIG. 4, the micron-level roughened structure 200B of the liquid guide roller 30B has a plurality of grooves 210B, and these grooves 210B extend along the width direction of the optical film 100, that is, along the fixed axis The extension direction of 230 extends. In some embodiments, as shown in FIG. 4, the micron-level roughening structure 200B of the liquid guiding roller 30B further has a plurality of protruding structures 220B, and the groove 210B is located between the protruding structures 220B.

In some embodiments, during the manufacturing process of the optical film 100, when the liquid guide roller 30B contacts the surface 100a of the optical film 100 with the contact surface, the protruding structure 220B of the micron roughened structure 200B directly contacts the surface 100a of the optical film 100 However, the trench 210B of the micron-level roughening structure 200B does not touch the surface 100a of the optical film 100.

In some embodiments, the material of the liquid guide roller 30B may include stainless steel, titanium alloy, and/or acrylic. The roller body 240 may be formed by a water jet cutting process, a laser process, and/or an etching process. A partial area of the surface is recessed, and a trench 210B is formed. In some embodiments, for example, the surface of the roller body 240 made of acrylic may be etched by an etching process to form the groove 210B. As shown in FIG. 4, in the embodiment, the bottom of the groove 210B is lower than the surface of the roller body 240. In some embodiments, the width of the trench 210B is equal to or less than 80 microns, for example. In some embodiments, the width of the trench 210B is, for example, between 5 and 80 microns. In some embodiments, the width of the trench 210B is, for example, between 10 and 50 microns. In some embodiments, the widths of the plurality of trenches 210B may be the same or different from each other.

According to some embodiments of the present disclosure, only the protruding structure 220B of the micron-level roughening structure 200B directly contacts the surface 100a of the optical film 100, so the effect of reducing the contact area between the liquid guide roller 30B and the optical film 100 can be effectively achieved. The friction resistance between the liquid guide roller 30B and the surface 100a of the optical film 100 can be reduced, thereby reducing the probability of breakage or scratching of the optical film 100, thereby improving the process yield and quality of the optical film.

FIG. 5 is a schematic cross-sectional view of a liquid guide roller 30C according to another embodiment of the present disclosure. In this embodiment, the same or similar component numbers are used for the same or similar component numbers as in the previous embodiment, and the related description of the same or similar components please refer to the foregoing description, which will not be repeated here.

In some embodiments, as shown in Figure 5, the liquid guide roller 30C is, for example, a fixed roller. The liquid guide roller 30C includes a fixed shaft 230 and a roller body 240. The fixed shaft 230 is fixedly connected to the roller. Main body 240. In some embodiments, as shown in FIG. 5, the contact surface with the micron-level roughening structure 200C may only occupy a partial area of the entire surface of the roller body 240, but the present disclosure is not limited to this.

In some embodiments, as shown in FIG. 5, the micron-level roughening structure 200C of the liquid guide roller 30C has a plurality of strip-shaped protrusion structures 220C, and these strip-shaped protrusion structures 220C extend along the width direction of the optical film 100 and also That is, it extends along the extension direction of the fixed shaft 230. In some embodiments, as shown in FIG. 5, the micron roughened structure 200C of the liquid guide roller 30C further has a plurality of grooves 210C, and the grooves 210C are located between the strip-shaped protrusion structures 220C.

In some embodiments, during the manufacturing process of the optical film 100, when the liquid guide roller 30C contacts the surface 100a of the optical film 100 with the contact surface, the strip-shaped protrusion structure 220C of the micron-level roughening structure 200C directly contacts the surface of the optical film 100 The surface 100a, and the trench 210C of the micron-level roughening structure 200C does not touch the surface 100a of the optical film 100. In some embodiments, as shown in FIG. 5, the top surface of the strip-shaped protrusion structure 220C is higher than the surface of the roller body 240.

In some embodiments, the width of the strip-shaped protrusion structure 220C is, for example, equal to or less than 80 microns. In some embodiments, the width of the strip-shaped protrusion structure 220C is, for example, between 5 and 80 microns. In some embodiments, the width of the strip-shaped protrusion structure 220C is, for example, between 10 and 50 microns. In some embodiments, the widths of the plurality of strip-shaped protrusion structures 220C may be the same or different from each other.

According to some embodiments of the present disclosure, only the strip-shaped protrusion structure 220C of the micron-level roughening structure 200C directly contacts the surface 100a of the optical film 100, so the effect of reducing the contact area between the liquid guide roller 30C and the optical film 100 can be effectively achieved Therefore, the frictional resistance between the liquid guide roller 30C and the surface 100a of the optical film 100 can be reduced, thereby reducing the probability of breakage or scratching of the optical film 100, thereby improving the process yield and quality of the optical film.

Although the content of the disclosure is disclosed in the foregoing embodiment, it is not intended to limit the content of the disclosure. Those with ordinary knowledge in the technical field to which the content of this disclosure belongs can make some changes and modifications without departing from the spirit and scope of the content of this disclosure. Therefore, the scope of protection of the content of this disclosure shall be subject to the scope of the attached patent application.

1, 2: Optical film process equipment 10: Conveying system 20: Liquid spraying device 30, 30’, 30A, 30B, 30C, 31: Liquid guide roller 40: Drying room 50: Process bath 60: Liquid removal device 70, 620, 630: spray washing device 100: Optical film 100a: surface 200, 200’, 200A, 200B, 200C: Micron-level roughened structure 210A: recess 210B, 210C: groove 220A: top 220B: prominent structure 220C: Strip protrusion structure 230: fixed shaft 240: Roller body 610: pressure roller group 611: The first roller 613: second roller d1: outer diameter D1: Flow direction D2: Direction DR1: Conveying direction G: Gravity direction α: Angle of contact surface

In order to make the features and advantages of the content of the disclosure more obvious and understandable, the following is a detailed description of different embodiments together with the accompanying drawings: FIG. 1 is a schematic diagram of an optical film manufacturing equipment and an optical film manufacturing process using the equipment according to an embodiment of the present disclosure. FIG. 2 shows a schematic diagram of an optical film manufacturing equipment and an optical film manufacturing process using the equipment according to another embodiment of the present disclosure. FIG. 3 is a three-dimensional schematic diagram of a liquid guide roller according to an embodiment of the present disclosure. FIG. 4 is a three-dimensional schematic diagram of a liquid guide roller according to another embodiment of the present disclosure. FIG. 5 is a schematic cross-sectional view of a liquid guide roller according to another embodiment of the present disclosure.

1: Optical film manufacturing equipment

10: Conveying system

30: Liquid guide roller

40: Drying room

50: Process bath

60: Liquid removal device

100: Optical film

100a: surface

200: Micron roughened structure

610: pressure roller group

611: The first roller

613: second roller

620, 630: spray washing device

d1: outer diameter

D1: Flow direction

D2: Direction

DR1: Conveying direction

α: Angle of contact surface

Claims (10)

An optical film manufacturing process equipment, including: A conveying system for carrying and conveying an optical film; A process bath through which the optical film is transported, leaving a liquid on a surface of the optical film; and A liquid guiding roller wheel contacts the surface of the optical film with a contact surface, wherein the contact surface has a micron-level roughened structure. According to the optical film manufacturing equipment described in claim 1, wherein the micron-level roughened structure has a plurality of recesses, and the recesses are recessed from a top of the micron-level roughened structure to the inside. For the optical film manufacturing equipment described in item 2 of the scope of patent application, the inner diameter of the recesses is equal to or less than 80 microns. The optical film manufacturing equipment described in claim 2, wherein the top of the micron-level roughened structure directly contacts the surface of the optical film; and/or, the liquid flows from the surface of the optical film along the contact The surface flows to both sides of the optical film to lead out the optical film. According to the optical film manufacturing equipment described in claim 1, wherein the micron-level roughened structure has a plurality of grooves, and the grooves extend along a width direction of the optical film. For the optical film manufacturing equipment described in item 5 of the scope of patent application, the width of the grooves is equal to or less than 80 microns. According to the optical film manufacturing equipment described in claim 1, wherein the micron-level roughened structure has a plurality of strip-shaped protrusion structures, and the strip-shaped protrusion structures extend along a width direction of the optical film. The optical film manufacturing equipment described in item 1 of the scope of patent application, wherein the liquid guide roller train is a fixed roller. According to the optical film manufacturing equipment described in item 1 of the scope of patent application, there is a contact surface angle between the liquid guide roller and the optical film, and the contact surface angle is 3 to 45 degrees. According to the optical film manufacturing equipment described in item 1 of the patent application, the average roughness (Ra) of the contact surface is 5 to 80 microns.

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