阅读说明：本技术 光学膜的干燥装置及干燥方法 (Drying device and drying method for optical film ) 是由 能木直安 杨以权 于 2020-04-13 设计创作，主要内容包括：本揭露内容的实施例提供一种光学膜的干燥装置及光学膜的干燥方法。光学膜的干燥装置包含干燥室、干燥辊轮及送气装置。干燥辊轮设置于干燥室内,送气装置连接至干燥辊轮。干燥辊轮具有输送表面,输送表面具有多个出气孔。送气装置传送气体至干燥辊轮内,且此气体经由出气孔从干燥辊轮内往外冲吹(purge)至输送表面之上的光学膜,以干燥光学膜。(Embodiments of the present disclosure provide an apparatus and a method for drying an optical film. The drying device for the optical film comprises a drying chamber, a drying roller and an air supply device. The drying roller is arranged in the drying chamber, and the air supply device is connected to the drying roller. The drying roller has a conveying surface with a plurality of air outlets. The gas supply device delivers gas into the drying roller, and the gas is blown (purge) from the drying roller to the optical film on the delivery surface through the gas outlet to dry the optical film.)

1. An optical film drying apparatus, comprising:

a drying chamber;

the drying roller is arranged in the drying chamber and is provided with a conveying surface, and the conveying surface is provided with a plurality of air outlets; and

and the gas feeding device is connected to the drying roller, transmits a gas into the drying roller, and blows (purge) the gas outwards from the drying roller to an optical film on the conveying surface through the plurality of gas outlet holes so as to dry the optical film.

2. The drying apparatus for an optical film according to claim 1, wherein the air supply device comprises:

a gas regulating device for regulating the gas to a predetermined temperature; and

and the gas transmission element is connected with the drying roller and the gas regulation and control device so as to transmit the gas with the preset temperature into the drying roller.

3. The apparatus for drying an optical film according to claim 1, wherein the drying roller is a fixed roller or a movable roller.

4. The apparatus for drying an optical film according to claim 1, wherein the sum of the areas of the plurality of air outlet holes accounts for 50% or more of the total area of the transport surface; and/or the plurality of outlet holes have a plurality of different shapes, sizes and configurations; and/or the plurality of air outlet holes are square, round or irregular; and/or the arrangement density of the air outlet holes on the conveying surface is different in different areas.

5. The drying apparatus for an optical film according to claim 1, further comprising:

and the air supply mechanism is arranged in the drying chamber, wherein the optical film is positioned between the drying roller and the air supply mechanism.

6. The apparatus for drying an optical film according to claim 1, wherein the diameter of the drying roller is 1 m or more.

7. The apparatus as claimed in claim 1, wherein the drying roller further comprises a limiting structure disposed at two ends of the conveying surface of the drying roller, the optical film being disposed on the conveying surface between the limiting structures.

8. The drying apparatus for an optical film according to claim 1, further comprising:

a sensor arranged in front of the drying chamber along the conveying direction of the optical film, the sensor being used for sensing the displacement degree of the optical film in the width direction; and

and the guide roller is arranged in front of the sensor along the conveying direction of the optical film, wherein the guide roller adjusts the conveying position of the optical film according to the displacement degree information of the optical film in the width direction received from the sensor.

9. The apparatus for drying an optical film according to claim 1, further comprising two drying rollers disposed adjacent to each other, and the optical film faces the two drying rollers with opposite surfaces, respectively.

10. A method of drying an optical film, comprising:

providing a drying apparatus, the drying apparatus comprising:

a drying chamber;

the drying roller is arranged in the drying chamber and is provided with a conveying surface, and the conveying surface is provided with a plurality of air outlets; and

the gas supply device is connected to the drying roller, transmits a gas into the drying roller, and blows (purge) the gas out of the drying roller through the plurality of gas outlet holes; and

an optical film is conveyed into the drying chamber and passes through the conveying surface of the drying roller, wherein the gas is blown (purge) from the inside of the drying roller to the optical film through the plurality of gas outlets so as to dry the optical film.

11. The method of claim 10, wherein the temperature of the gas is 30 ℃ to 140 ℃ and/or the wind speed of the gas is 10 m/s to 30 m/s.

12. The method of claim 10, wherein the gas comprises air, an inert gas, or a combination thereof.

13. The method of drying an optical film according to claim 10, wherein the drying device includes two drying rollers disposed adjacent to each other, the method further comprising:

the optical film is faced with two opposite surfaces and passes through the conveying surfaces of the two drying rollers respectively.

Technical Field

The disclosure relates to an optical film drying device and an optical film drying method.

Background

In the optical film manufacturing process, the optical film is usually required to be soaked in various process baths for various wet processes, and then the surface of the optical film is required to be cleaned and dried before the optical film is wound for the subsequent optical film manufacturing process. However, when the optical film is dried, the optical properties of the optical film may be adversely affected due to incomplete drying.

Therefore, in order to improve the quality of the optical film, the industry is dedicated to improving the drying process of the optical film.

Disclosure of Invention

The disclosure relates to an optical film drying device and an optical film drying method. In the embodiment, the gas is blown to the optical film on the conveying surface from the gas outlet of the drying roller, so that the gas can be blown to the optical film in a short distance, and the effect of rapid drying can be achieved; and the air pressure generated by the gas ejected from the air outlet can support the optical film, so that the optical film can not directly contact the conveying surface of the drying roller when being dried by the drying roller, thereby reducing the friction scratch possibly generated when the optical film is contacted with the drying roller and further improving the quality of the optical film.

According to an embodiment of the present disclosure, an apparatus for drying an optical film is provided. The drying device for the optical film comprises a drying chamber, a drying roller and an air supply device. The drying roller is arranged in the drying chamber, and the air supply device is connected to the drying roller. The drying roller has a conveying surface with a plurality of air outlets. The gas supply device delivers gas into the drying roller, and the gas is blown (purge) from the drying roller to the optical film on the delivery surface through the gas outlet to dry the optical film.

According to another embodiment of the present disclosure, a method for drying an optical film is provided. The method for drying the optical film comprises the following steps: providing a drying device, wherein the drying device comprises a drying chamber, a drying roller and a gas supply device, the drying roller is arranged in the drying chamber, the gas supply device is connected to the drying roller, the drying roller is provided with a conveying surface, the conveying surface is provided with a plurality of gas outlet holes, the gas supply device conveys gas into the drying roller, and the gas is blown (purge) from the inside of the drying roller to the outside through the gas outlet holes; and conveying the optical film into the drying chamber and through the conveying surface of the drying roller, wherein the gas is blown to the optical film from the inside of the drying roller to the outside through the gas outlet hole so as to dry the optical film.

Drawings

In order to make the features and advantages of the present disclosure more comprehensible, various embodiments accompanied with figures are described in detail below:

FIG. 1 is a schematic cross-sectional view of an apparatus for drying an optical film according to an embodiment of the disclosure;

FIG. 2 is a schematic perspective view illustrating an apparatus for drying an optical film according to an embodiment of the disclosure;

FIG. 3 is a schematic perspective view illustrating an apparatus for drying an optical film according to another embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of an apparatus for drying an optical film according to another embodiment of the present disclosure;

FIG. 5 depicts a schematic top view of the conveying surface of a drying roller of a drying apparatus according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram illustrating a method for drying an optical film according to an embodiment of the disclosure.

[ notation ] to show

10. 10', 10A-drying device;

20. 60, 70-optical film;

20' to the optical laminate;

20A, 20B-surface;

50 to a process bath;

80-a laminating device;

100-drying chamber;

200. 200', 200A-drying roller;

210. 210', 210A-a conveying surface;

220. 220', 220A to air outlet holes;

230-a fixed shaft;

240-hollow roller main body;

250-bearing;

260-limiting structure;

300-an air supply device;

310-gas regulating device;

320-a gas delivery element;

400. 410-air supply mechanism;

500-sensor;

600-guide roller;

810. 820-laminating roller;

d1-conveying direction;

s1 size;

w1 width.

Detailed Description

In the embodiment of the disclosure, the gas is blown to the optical film on the conveying surface from the gas outlet of the drying roller, so that the gas can be blown to the optical film in a short distance, and the effect of rapid drying can be achieved; and the air pressure generated by the gas ejected from the air outlet can support the optical film, so that the optical film can not directly contact with the conveying surface of the drying roller when being dried by the drying roller, thereby reducing the friction scratch possibly generated when the optical film is contacted with the drying roller and further improving the quality of the optical film.

While the present disclosure has been described in terms of various specific embodiments or examples, it is to be understood that these specific embodiments are merely exemplary and are not to be considered as limiting the scope of the disclosure. For example, when a first element is formed over a second element in the description, the description may include embodiments in which the first element is in direct contact with the second element, and may also include embodiments in which other elements are formed between the first element and the second element, wherein the first element and the second element are not in direct contact. The same or similar reference numbers are used in different embodiments and figures to denote the same or similar elements, but are used for simplicity and clarity in describing the disclosure and do not necessarily indicate a particular relationship between the various embodiments and/or structures being discussed. It should be noted that the embodiments are provided only for illustrating the technical features of the disclosure, and not for limiting the claims of the disclosure. Those skilled in the art will recognize that, based on the following description, equivalent modifications and variations can be made without departing from the spirit of the disclosure. Some elements are omitted from some embodiments to clearly show the technical features of the disclosure.

Furthermore, spatially relative terms, such as "below …," "below," "…," "between …," and the like, may be used herein to facilitate describing the relationship of element(s) or feature(s) to other element(s) or feature(s) in the drawings and may encompass different orientations of the device in use or operation and the orientation depicted in the drawings. The device may be turned to a different orientation (rotated 90 degrees or otherwise), and the spatially relative adjectives used herein may be similarly interpreted. It should be understood that some process steps may include additional process steps before, during, or after the performance of the process steps, and some process steps described in some embodiments may be replaced or deleted by other process steps in methods of other embodiments.

Fig. 1 is a schematic cross-sectional view illustrating an apparatus for drying an optical film according to an embodiment of the present disclosure, and fig. 2 is a schematic perspective view illustrating an apparatus for drying an optical film according to an embodiment of the present disclosure. In the present disclosure, the optical film 20 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; alternatively, the optical film 20 may be an optical laminate formed of a multilayer optical film, for example, which may include a polarizing film and a protective film formed thereon; alternatively, the optical film 20 may include layers that are beneficial for optical gain, alignment, compensation, turning, cross-linking, diffusion, protection, anti-sticking, scratch-resistant, anti-glare, reflection suppression, high refractive index, and the like. In the embodiment of the present disclosure, the optical film 20 is, for example, a continuous roll material.

In some embodiments, the optical film 20 is, for example, a polarizing film, and the material of the polarizing film may be a polyvinyl alcohol (PVA) resin film, which may be prepared by saponifying a polyvinyl acetate resin. Examples of the polyvinyl acetate resin include a homopolymer of vinyl acetate, i.e., polyvinyl acetate, and a copolymer of vinyl acetate and other monomers copolymerizable with vinyl acetate.

In some embodiments, the optical film 20 is, for example, a protective film, which may be a single layer or a multi-layer structure. The material of the protective film may be, for example, a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, and the like. The thermoplastic resin may include a Cellulose resin (e.g., Triacetate Cellulose (TAC)), a Cellulose Diacetate Cellulose (DAC)), an acrylic resin (e.g., polymethyl methacrylate (PMMA)), a polyester resin (e.g., Polyethylene terephthalate (PET), Polyethylene naphthalate), an Olefin resin, a polycarbonate resin, a cycloolefin resin, Oriented-tensile Polypropylene (OPP), Polyethylene (PE), Polypropylene (PP), a cycloolefin Polymer (COP), a cycloolefin Copolymer (COC), a COC, or any combination thereof, in addition, the material of the protective film may be, for example, (meth) acrylic, urethane, acrylic urethane, epoxy, silicone-based, or other thermosetting resins, the protective film may be further subjected to a surface treatment such as an anti-glare treatment, an anti-reflection treatment, a hard coat treatment, a charge prevention treatment, or an anti-stain treatment.