TWI808892B - Transfer method for uv optical film and manufacturing method of transfering roller - Google Patents

Abstract

The present invention provides a transfer method for ultraviolet (UV) optical film and a manufacturing method of a transferring roller. The manufacturing method includes: coating a photoresist (PR) layer onto an outer surface of a metallic roller; emitting an exposure UV light having a predetermined exposure wavelength, which forms a predetermined light shape by passing through a mask or an interference, to travel onto the PR layer, so that the PR layer becomes a patterned transfer inner layer; and forming a patterned transfer outer layer, which includes fluorine compound, onto an outer surface of the patterned transfer inner layer, in which the patterned transfer outer layer, the patterned transfer inner layer, and the metallic roller jointly form the transferring roller.

Description

Production method of transfer printing of ultraviolet optical film and production method of transfer roller

The invention relates to a transfer roller, in particular to a transfer printing manufacturing method of an ultraviolet optical film and a manufacturing method of the transfer roller.

If the transfer layer of the existing transfer roller is made of UV-exposed materials, the optical film to be rolled and transferred needs to avoid using UV-curable materials, so as to avoid the transfer layer from being damaged when the optical film is rolled and cured, thereby distorting the transfer pattern. Therefore, the inventor believes that the above-mentioned defects can be improved, Naite devoted himself to research and combined with the application of scientific principles, and finally proposed an invention with reasonable design and effective improvement of the above-mentioned defects.

The embodiment of the present invention provides a transfer printing manufacturing method of an ultraviolet optical film and a manufacturing method of a transfer roller, which can effectively improve the possible defects of the existing transfer rollers.

The embodiment of the present invention discloses a transfer printing manufacturing method of an ultraviolet optical film, which includes: implementing a roller manufacturing step: manufacturing a transfer roller and the manufacturing process includes: coating a photoresist layer on the outer surface of a metal roller; using an exposure ultraviolet light with a preset exposure wavelength to form a predetermined light shape through a mask or interference, and then irradiating the photoresist layer, so that the photoresist layer constitutes a pattern transfer inner layer; and forming a pattern transfer outer layer on the outer surface of the pattern transfer inner layer, which is composed of a fluorine compound; The pattern transfer outer layer, the pattern transfer inner layer, and the metal roller together constitute the transfer roller; implementing a transfer step: rolling the pattern transfer outer layer of the transfer roller onto an ultraviolet optical film without interruption; wherein, the ultraviolet optical film can be irradiated and cured by ultraviolet rays whose wavelength falls within a preset photocuring band, and the preset exposure wavelength of the exposed ultraviolet rays falls within the preset photocuring band; and implementing a curing step: curing with a wavelength falling within the preset photocuring band The ultraviolet light is used to irradiate and cure the ultraviolet optical film rolled by the transfer roller.

The embodiment of the present invention also discloses a method for manufacturing a transfer roller, which includes: coating a photoresist layer on the outer surface of a metal cylinder; using an exposure ultraviolet light with a predetermined exposure wavelength to form a predetermined light shape through a photomask or interference, and then irradiating the photoresist layer, so that the photoresist layer constitutes a pattern transfer inner layer; and forming a pattern transfer outer layer on the outer surface of the pattern transfer inner layer, which is composed of a fluorine compound; Together constitute the transfer roller.

To sum up, the method for manufacturing an ultraviolet optical film by transfer printing and the method for manufacturing a transfer roller disclosed in the embodiments of the present invention use the pattern transfer outer layer to be composed of the fluorine compound, so that after the pattern transfer outer layer is rolled on the ultraviolet optical film, the forming surfaces that are in high-pressure contact between the two can be effectively separated from each other, and there is less possibility of mutual influence or damage to the appearance.

From another point of view, in the transfer printing manufacturing method of the ultraviolet optical film disclosed in the embodiment of the present invention, the pattern transfer outer layer composed of the fluorine compound is formed, so that the pattern transfer inner layer can be made of ultraviolet exposure material, and the optical film rolled by the transfer roller can be made of ultraviolet curable material.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention, but these descriptions and drawings are only used to illustrate the present invention, not to limit the protection scope of the present invention.

The following is a description of the implementation of the "transfer manufacturing method of ultraviolet optical film and manufacturing method of transfer roller" disclosed by the present invention through specific specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another element, or one signal from another signal. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

[Example 1]

Please refer to FIG. 1 to FIG. 9 , which are the first embodiment of the present invention. As shown in FIG. 1 , the present embodiment discloses a transfer printing manufacturing method of an ultraviolet optical film, which sequentially includes: a roller manufacturing step S100 , a transfer printing step S200 , and a curing step S300 , but the present invention is not limited thereto. For example, the transfer printing manufacturing method of the ultraviolet optical film may also add corresponding other steps according to design requirements.

It should be noted that the manufacturing step S100 of the roller is described as being combined with the transferring step S200 and the curing step S300 in this embodiment, but the present invention is not limited thereto. For example, in other embodiments not shown in the present invention, the roller manufacturing step S100 can be regarded as a method for manufacturing a transfer roller, and then implemented alone or in combination with other steps. The steps S100-S300 of the transfer printing manufacturing method of the ultraviolet optical film will be described below.

The roller manufacturing step S100: as shown in FIG. 1 with FIG. 2 to FIG. 7, manufacture a transfer roller 100 (such as: FIG. 6) and its manufacturing process includes a coating process S110, a patterning process S120, and a forming process S130. It should be noted that the manufacturing step S100 of the roller is achieved by implementing the above-mentioned multiple processes S110-S130, so that no nickel material is used in the manufacturing step S100 of the roller, thereby significantly reducing the manufacturing cost. That is to say, any roller manufacturing step using nickel metal is not the roller manufacturing step S100 (or the manufacturing method of the transfer roller) referred to in this embodiment.

The coating process S110 : as shown in FIG. 1 and FIG. 2 , a photoresist layer 2 a is coated on the outer surface of a metal cylinder 1 . Wherein, the metal roller 1 is a chromium metal roller or a copper metal roller, and the length of the metal roller 1 is preferably greater than 1.5 meters (m), and the photoresist layer 2a is made of a positive photoresist, which can dissolve the part exposed to light during development after exposure, and the pattern of the unexposed part remains after development.

Furthermore, in this embodiment, the photoresist layer 2a covers the entire outer surface of the metal cylinder 1 to form a seamless structure; that is, on any cross-section perpendicular to the length direction of the metal cylinder 1, the photoresist layer 2a is circular and covers the entire outer surface of the metal cylinder 1 without gaps.

The patterning process S120: as shown in FIG. 1 and FIG. 3 to FIG. 5 , an exposure ultraviolet light L1 having a predetermined exposure wavelength passes through the mask M or interferes to form a predetermined light shape, and then irradiates it on the photoresist layer 2a, so that the photoresist layer 2a constitutes a pattern transfer inner layer 2. In this embodiment, the preset exposure wavelength of the exposure ultraviolet light L1 is preferably between 400 nanometers (nm) and 410 nm.

Furthermore, an exposure light source S1 used to emit the exposure ultraviolet light L1 can be at least one light emitting diode chip capable of emitting light between 350 nm and 450 nm, and at least one type of the light emitting diode chip includes a laser diode chip, but the type can be adjusted according to design requirements, and the present invention is not limited thereto. The mask M may have grayscale values distributed in a gradual manner, so as to facilitate the passage of the exposure ultraviolet L1 to form the predetermined light shape.

Further, as shown in FIG. 3 , the exposure range of the exposure light source S1 and the photomask M in this embodiment may correspond to a partial length range of the metal cylinder 1, so that the exposure light source S1 and the photomask M can move from one end of the metal cylinder 1 to the other end when the metal cylinder 1 rotates to perform the exposure operation.

Alternatively, as shown in FIG. 4 , the exposure range of the exposure light source S1 and the mask M in this embodiment may also correspond to the entire length range of the metal cylinder 1, so that the exposure light source S1 and the mask M can be kept still while the metal cylinder 1 is rotating to perform the exposure operation.

The forming process S130: as shown in FIG. 1 , FIG. 6 , and FIG. 7 , a pattern transfer outer layer 3 is formed on the outer surface 21 of the pattern transfer inner layer 2 , which is made of a fluorine compound, so that the pattern transfer outer layer 3 , the pattern transfer inner layer 2 , and the metal cylinder 1 can jointly form the transfer roller 100 . In addition, the pattern transfer outer layer 3 completely covers the outer surface 21 of the pattern transfer inner layer 2 through evaporation.

It should be noted that any transfer layer not made of fluorine compounds (especially the transfer layer made of metal) is different from the pattern transfer outer layer 3 referred to in this embodiment. Furthermore, the fluorine compound constituting the pattern transfer outer layer 3 is preferably limited to polytetrafluoroethylene (PTFE) in this embodiment, but the present invention is not limited thereto.

The transfer step S200 : as shown in FIG. 8 , the pattern of the transfer roller 100 is used to transfer the outer layer 3 onto an ultraviolet optical film 200 without interruption. Wherein, the selection of the ultraviolet optical film 200 must meet the following characteristics: it can be irradiated and cured by ultraviolet rays whose wavelength falls within a preset photocuring band, and the preset exposure wavelength of the exposing ultraviolet rays L1 falls within the preset photocuring band. In this embodiment, the preset photocuring wavelength range is preferably between 350 nm to 410 nm, but the present invention is not limited thereto.

Accordingly, through the selection of the characteristics of the ultraviolet optical film 200, the pattern transfer outer layer 3 made of the fluorine compound can effectively separate the forming surfaces that are in high-pressure contact between the two after rolling the ultraviolet optical film 200, and there is less possibility of mutual influence or damage to the appearance. To put it another way, the selection of the pattern transfer outer layer 3 and the ultraviolet optical film 200 has a mutual matching relationship, so any optical film that does not meet the above characteristics is different from the ultraviolet optical film 200 referred to in this embodiment.

The curing step S300 : as shown in FIG. 8 and FIG. 9 , irradiate and cure the ultraviolet optical film 200 rolled by the transfer roller 100 with a curing ultraviolet L2 whose wavelength falls within the predetermined light curing band. Wherein, a curing light source S2 used to emit the curing ultraviolet light L2 can be at least one light-emitting diode chip capable of emitting between 350 nm to 410 nm, and at least one type of the light-emitting diode chip includes a laser diode chip, but this type can be adjusted and changed according to design requirements, and the present invention is not limited thereto.

In this embodiment, since the pattern transfer outer layer 3 is composed of the fluorine compound, the curing ultraviolet L2 irradiated on the transfer roller 100 can be reflected by at least 70% of the pattern transfer outer layer 3, thereby effectively preventing the pattern transfer inner layer 2 from being damaged or cracked by the curing ultraviolet L2.

Furthermore, if the transfer roller 100 is irradiated by the curing ultraviolet light L2 (for a long time), it is still easy to cause cracks 22 on the outer surface 21 of the pattern transfer inner layer 2 . Wherein, the outer surface 21 formed with the crack 22 can maintain its shape unchanged through the pattern transfer outer layer 3 in this embodiment; that is, the pattern transfer outer layer 3 can effectively join the pattern transfer inner layer 2 block located next to the crack 22, so that the pattern transfer outer layer 3 still presents a predetermined shape, so as to avoid distortion of the pattern transfer outer layer 3 when rolling the ultraviolet optical film 200.

According to the above, in view of the fact that the pattern transfer outer layer 3 can not only prevent the pattern transfer inner layer 2 from being damaged by the curing ultraviolet L2, but even if the pattern transfer inner layer 2 is exposed to the curing ultraviolet L2 to cause cracks, the pattern transfer outer layer 3 can still maintain a predetermined appearance and avoid the distortion of the transfer pattern, so the curing light source S2 and the exposure light source S1 in this embodiment can use the same light source according to the design requirements, thereby effectively reducing the overall equipment cost and reducing the volume required for the equipment. .

[Example 2]

Please refer to FIG. 10 , which is the second embodiment of the present invention. Since this embodiment is similar to the above-mentioned first embodiment, the similarities between the two embodiments will not be repeated (for example: the manufacturing step S100 of the roller), and the differences between this embodiment and the above-mentioned first embodiment are roughly described as follows:

In this embodiment, the transferring step and the curing step can be implemented simultaneously. Specifically, the curing light source S2 can be arranged under the ultraviolet optical film 200, so when the ultraviolet optical film 200 is rolled by the transfer roller 100, it can be cured immediately by the curing ultraviolet light L2 emitted by the curing light source S2, so as to improve the overall production efficiency.

Furthermore, when the transfer step and the curing step are implemented simultaneously, how to avoid the distortion of the transfer pattern due to the irradiation of the curing ultraviolet light L2 on the transfer roller 100 is more important, so the pattern transfer outer layer 3 composed of the fluorine compound is therefore more necessary and irreplaceable.

[Technical effect of the embodiment of the present invention]

To sum up, the method for manufacturing an ultraviolet optical film by transfer printing and the method for manufacturing a transfer roller disclosed in the embodiments of the present invention use the pattern transfer outer layer to be composed of the fluorine compound, so that after the pattern transfer outer layer is rolled on the ultraviolet optical film, the forming surfaces that are in high-pressure contact between the two can be effectively separated from each other, and there is less possibility of mutual influence or damage to the appearance.

From another point of view, in the transfer printing manufacturing method of the ultraviolet optical film disclosed in the embodiment of the present invention, the pattern transfer outer layer composed of the fluorine compound is formed, so that the pattern transfer inner layer can be made of ultraviolet exposure material, and the optical film rolled by the transfer roller can be made of ultraviolet curable material.

Furthermore, in the transfer printing manufacturing method of the ultraviolet optical film disclosed in the embodiment of the present invention, the pattern transfer outer layer adopted can not only prevent the pattern transfer inner layer from being damaged by the cured ultraviolet radiation (for example: the pattern transfer outer layer can be used to reflect at least 70% of the ultraviolet rays with a wavelength range of 350 nm to 410 nm and irradiated on the transfer roller), and even if the pattern transfer inner layer is exposed to the curing ultraviolet radiation to cause cracks, the pattern transfer outer layer can still maintain a predetermined appearance and avoid The transfer pattern is distorted, thereby effectively maintaining the roll forming accuracy of the transfer roller.

Furthermore, in the transfer printing manufacturing method of the ultraviolet optical film disclosed in the embodiment of the present invention, the curing light source and the exposure light source can use the same light source according to the design requirements, thereby effectively reducing the overall equipment cost and reducing the required volume of the equipment.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the patent scope of the present invention.

S100: Roller Manufacturing Steps S110: coating process S120: Patterning process S130: Forming process S200: transfer step S300: Curing step 100: transfer roller 1: metal roller 2a: Photoresist layer 2: Pattern transfer inner layer 21: Outer surface 22: crack 3: Pattern transfer outer layer 200: UV optical film M: mask S1: Exposure light source S2: curing light source L1: UV exposure L2: UV curing

FIG. 1 is a schematic flowchart of the steps of the transfer printing manufacturing method of an ultraviolet optical film according to Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of the coating process in FIG. 1 .

FIG. 3 is a schematic diagram of the patterning process in FIG. 1 .

FIG. 4 is a schematic diagram of another aspect of the patterning process in FIG. 1 .

FIG. 5 is a process schematic diagram of the patterning process in FIG. 1 .

FIG. 6 is a schematic diagram of the forming process in FIG. 1 .

FIG. 7 is an enlarged schematic view of area VII of FIG. 6 .

FIG. 8 is a schematic diagram of the transfer step and the curing step in FIG. 1 .

FIG. 9 is an enlarged schematic view of area IX in FIG. 8 .

10 is a schematic diagram of the transfer step and the curing step of the transfer printing manufacturing method of the ultraviolet optical film according to the second embodiment of the present invention.

S100: Roller Manufacturing Steps

S110: coating process

S120: Patterning process

S130: Forming process

S200: transfer step

S300: Curing step

Claims (9)

A transfer printing manufacturing method of an ultraviolet optical film, which includes: implementing a roller manufacturing step: manufacturing a transfer roller and the manufacturing process includes: coating a photoresist layer on the outer surface of a metal cylinder; forming a predetermined light shape through a photomask or interference with an exposure ultraviolet light having a predetermined exposure wavelength, and then irradiating the photoresist layer, so that the photoresist layer constitutes a pattern transfer inner layer; and forming a pattern transfer outer layer on the outer surface of the pattern transfer inner layer, which is composed of a fluorine compound; The outer layer, the pattern transfer inner layer, and the metal roller together constitute the transfer roller; a transfer step is carried out: the pattern transfer outer layer of the transfer roller is continuously rolled on an ultraviolet optical film; wherein, the ultraviolet optical film can be irradiated and cured by ultraviolet rays whose wavelength falls within a preset photocuring band, and the preset exposure wavelength of the exposing ultraviolet rays falls within the preset photocuring band; Curing the ultraviolet optical film after being rolled by the transfer roller; wherein, in the curing step, the transfer roller is irradiated by the curing ultraviolet rays, so that cracks are generated on the outer surface of the pattern transfer inner layer; wherein, the outer surface formed with the crack is kept in shape by the pattern transfer outer layer. The transfer printing manufacturing method of the ultraviolet optical film according to claim 1, wherein, in the manufacturing step of the roller, the fluorine compound constituting the outer layer of the pattern transfer is further limited to polytetrafluoroethylene (polytetrafluoroethene, PTFE). The transfer printing manufacturing method of the ultraviolet optical film according to claim 2, wherein, in the manufacturing step of the roller, the pattern transfer outer layer is completely covered on the outer surface of the pattern transfer inner layer by evaporation. The transfer printing manufacturing method of an ultraviolet optical film according to claim 2, wherein in the curing step, the curing ultraviolet rays irradiated on the transfer roller can be reflected by at least 70% by the pattern transfer outer layer. The transfer printing manufacturing method of an ultraviolet optical film as described in Claim 1, wherein, the preset exposure wavelength is between 350 nanometers (nm) and 450 nm, and the preset photocuring wavelength range is between 350 nm and 410 nm. The transfer printing manufacturing method of the ultraviolet optical film according to claim 1, wherein the metal roller is a chromium metal roller or a copper metal roller, and any nickel metal material is not used in the roller manufacturing step. A method for manufacturing a transfer roller, comprising: coating a photoresist layer on the outer surface of a metal cylinder; using an exposure ultraviolet light with a preset exposure wavelength to form a predetermined light shape through a photomask or interference, and then irradiating the photoresist layer so that the photoresist layer constitutes a pattern transfer inner layer; and forming a pattern transfer outer layer on the outer surface of the pattern transfer inner layer, which is composed of a fluorine compound; wherein the pattern transfer outer layer, the pattern transfer inner layer, and the metal roller jointly constitute the transfer scroll wheel; Wherein, when cracks are formed on the outer surface of the pattern transfer inner layer, the outer surface with the cracks can maintain its shape through the pattern transfer outer layer. The manufacturing method of the transfer roller according to claim 7, wherein the metal roller is a chromium metal roller or a copper metal roller, and the manufacturing method of the transfer roller does not use any nickel metal material. The manufacturing method of the transfer roller according to claim 7, wherein the fluorine compound constituting the pattern transfer outer layer is further limited to polytetrafluoroethylene, and the pattern transfer outer layer can be used to reflect at least 70% of the ultraviolet rays with a wavelength range of 350 nm to 410 nm and irradiated on the transfer roller.

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