CN115555230A - Ultraviolet irradiation device, polarizing plate bonding apparatus using same, and polarizing plate bonding method - Google Patents
Ultraviolet irradiation device, polarizing plate bonding apparatus using same, and polarizing plate bonding method Download PDFInfo
- Publication number
- CN115555230A CN115555230A CN202211369137.5A CN202211369137A CN115555230A CN 115555230 A CN115555230 A CN 115555230A CN 202211369137 A CN202211369137 A CN 202211369137A CN 115555230 A CN115555230 A CN 115555230A
- Authority
- CN
- China
- Prior art keywords
- ultraviolet
- lamp
- ultraviolet light
- adhesive
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 72
- 230000001070 adhesive effect Effects 0.000 claims abstract description 72
- 238000010030 laminating Methods 0.000 claims description 35
- 229920001577 copolymer Polymers 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 229920002554 vinyl polymer Polymers 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 239000003522 acrylic cement Substances 0.000 claims description 4
- 229910001507 metal halide Inorganic materials 0.000 claims description 4
- 150000005309 metal halides Chemical class 0.000 claims description 4
- 239000005060 rubber Substances 0.000 claims description 4
- YZCKVEUIGOORGS-OUBTZVSYSA-N Deuterium Chemical compound [2H] YZCKVEUIGOORGS-OUBTZVSYSA-N 0.000 claims description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 150000005215 alkyl ethers Chemical class 0.000 claims description 3
- HGAZMNJKRQFZKS-UHFFFAOYSA-N chloroethene;ethenyl acetate Chemical compound ClC=C.CC(=O)OC=C HGAZMNJKRQFZKS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052805 deuterium Inorganic materials 0.000 claims description 3
- 229920006332 epoxy adhesive Polymers 0.000 claims description 3
- VSQYNPJPULBZKU-UHFFFAOYSA-N mercury xenon Chemical compound [Xe].[Hg] VSQYNPJPULBZKU-UHFFFAOYSA-N 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229910052724 xenon Inorganic materials 0.000 claims description 3
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 2
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- -1 polyethylene Terephthalate Polymers 0.000 description 6
- 239000005001 laminate film Substances 0.000 description 5
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000004713 Cyclic olefin copolymer Substances 0.000 description 2
- 206010052128 Glare Diseases 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 239000011118 polyvinyl acetate Substances 0.000 description 2
- 238000004383 yellowing Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 235000013290 Sagittaria latifolia Nutrition 0.000 description 1
- 230000003669 anti-smudge Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 235000015246 common arrowhead Nutrition 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B2038/0052—Other operations not otherwise provided for
- B32B2038/0076—Curing, vulcanising, cross-linking
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention provides an ultraviolet irradiation device for curing an ultraviolet curing adhesive. The ultraviolet irradiation device includes a first ultraviolet irradiation section and a second ultraviolet irradiation section. The first ultraviolet irradiation part emits first ultraviolet light by an electrode lamp. The second ultraviolet light irradiation part is arranged at the downstream side of the first ultraviolet light irradiation part and emits second ultraviolet light by the electrodeless lamp. The UVB light product quantity of the first ultraviolet light and the second ultraviolet light is 200mJ/cm 2 To 300mJ/cm 2 And UVB light amount of the first ultraviolet light: the UVB light amount of the second ultraviolet light is 1:2 to 1:3.
Description
Technical Field
The invention relates to an ultraviolet irradiation device, a polarizing plate laminating device using the same and a polarizing plate laminating method.
Background
The production of polarizing plates often involves a process of laminating the respective films separately produced. In such a process, an adhesive may be applied to the bonding surfaces of the films, and then the adhesive is cured after the films are bonded, thereby achieving the effect of bonding the films. One common type of adhesive is a photocurable adhesive. As the name implies, it is cured by light.
If the illuminance and quantity of light used for curing are too high or too low, poor adhesion or defects may occur, which may cause peeling of the adhesive and the film in the polarizing plate due to external impact or human influence, thereby deteriorating the quality of the polarizing plate. In order to improve the adhesion and appearance, the development and adjustment of adhesive components and polarizing plate constituting elements have been continuously performed in the related art. However, such an approach not only consumes research resources, but also increases production costs.
Disclosure of Invention
In the present invention, the occurrence of poor adhesion and defects is improved by adjusting the light arrangement in the polarizing plate laminating apparatus, without involving the development and adjustment of the adhesive component and the constituent elements of the polarizing plate.
The invention provides an ultraviolet irradiation device for curing an ultraviolet curing adhesive. The ultraviolet irradiation device includes a first ultraviolet irradiation section and a second ultraviolet irradiation section. The first ultraviolet irradiation part emits first ultraviolet light by an electrode lamp. The second ultraviolet light irradiation part is arranged at the downstream side of the first ultraviolet light irradiation part and emits second ultraviolet light by the electrodeless lamp. The UVB light product quantity of the first ultraviolet light and the second ultraviolet light is 200mJ/cm 2 To 300mJ/cm 2 And UVB light amount of the first ultraviolet light: the UVB light amount of the second ultraviolet light is 1:2 to 1:3.
the invention also provides polarizing plate laminating equipment which comprises a laminating device and the ultraviolet irradiation device according to the embodiment. The ultraviolet irradiation device is disposed on the downstream side of the bonding device.
The invention also provides a method for attaching the polarizing plate, which comprises the following steps. First, a plurality of films of a polarizing plate are provided. Coating ultraviolet curing adhesive on at least one bonding surface of the films. Then, the films are bonded to form a laminated film. Irradiating the laminated film with a first ultraviolet light emitted from an electrode lamp,to partially cure the ultraviolet curable adhesive. After the laminated film is irradiated with the first ultraviolet light, the laminated film is irradiated with a second ultraviolet light emitted from an electrodeless lamp to completely cure the ultraviolet-curable adhesive. The UVB light product quantity of the first ultraviolet light and the second ultraviolet light is 200mJ/cm 2 To 300mJ/cm 2 And UVB light amount of the first ultraviolet light: the UVB light amount of the second ultraviolet light is 1:2 to 1:3.
the invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is an exemplary schematic diagram of a polarizing plate laminating apparatus and an ultraviolet light irradiation device according to the present invention.
Wherein, the reference numbers:
polarizing plate laminating apparatus
20: film
22 film
24 film
26 laminated film
100 laminating device
110 first laminating roller
120 second laminating roller
130 first press roller
140 second press roller
200 ultraviolet irradiation device
210 first ultraviolet irradiating part
212 irradiation unit
220 the second ultraviolet irradiation part
222 irradiation unit
300 roller
310 arrow head
400 coating device
500 cooling roller
A ultraviolet-curable adhesive
L1 first ultraviolet light
L2 second ultraviolet light
Detailed Description
The structural and operational principles of the present invention are described in detail below with reference to the accompanying drawings:
for purposes of clarity, elements may not be drawn to scale. In addition, some elements and/or symbols may be omitted. The description and drawings are merely provided for illustration and are not intended to be limiting. It is contemplated that elements and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
When a component is disposed "upstream" of another component, the workpiece encounters the component first and then the other component along the conveying direction during the process. When it is stated that a component is disposed on the "downstream side" of another component, the workpiece encounters the other component and then the component in the conveying direction during the process. When it is stated that a device is disposed on the "opposite side" of another device, the device and the another device are disposed on the two sides of the workpiece correspondingly during the process.
Referring now to fig. 1, a polarizing plate laminating apparatus and an ultraviolet light irradiation device according to the present invention are exemplarily shown. As shown in fig. 1, an exemplary polarizing plate laminating apparatus 10 includes a laminating device 100 and an ultraviolet irradiation device 200. The ultraviolet irradiation device 200 is disposed downstream of the bonding device 100.
Specifically, the laminating apparatus 100 is used for laminating a plurality of films 20, 22, 24 of polarizing plates to form a laminated film 26. According to some embodiments, the laminating apparatus 100 may include a first laminating roller 110 and a second laminating roller 120. The first laminating roller 110 and the second laminating roller 120 are disposed opposite to each other to apply pressure to the films 20, 22, 24 to integrate them into one, i.e., laminate film 26. According to some embodiments, the laminating apparatus 100 may further include a first pressing roller 130 and a second pressing roller 140 contacting the first laminating roller 110 and the second laminating roller 120, respectively. The first pressing roller 130 and the second pressing roller 140 further provide pressure to the first laminating roller 110 and the second laminating roller 120, which are in corresponding contact, to improve the flatness of the surface of the laminate film 26. In some embodiments, the outer layer of the first applying roller 110 and the second applying roller 120 may be covered with a buffer material (not shown), such as but not limited to rubber, foam, or plastic, to provide a buffer effect when pressing the films 20, 22, 24, so as to avoid defects. In some embodiments, one or more of the first laminating roller 110, the second laminating roller 120, the first pressing roller 130, and the second pressing roller 140 may also function as a cooling roller, for example, by introducing a cooling gas or a cooling liquid into the interior of the hollow structure to achieve the effect of cooling the membranes 20, 22, 24.
In some embodiments, films 20 and 24 are, for example, protective films. The protective film may have a single-layer structure or a multi-layer structure. The material of the protective film may be a thermoplastic resin having excellent properties such as transparency, mechanical strength, thermal stability, and moisture barrier property. Such as, but not limited to, cellulose resin (e.g., triacetate Cellulose (TAC), diacetate Cellulose (DAC)), acrylic resin (e.g., polymethyl methacrylate (PMMA)), polyester resin (e.g., polyethylene Terephthalate (PET), polyethylene naphthalate), olefin resin, polycarbonate resin, cycloolefin resin, oriented-tensile Polypropylene (OPP), polyethylene (PE), polypropylene (Polypropylene, PP), cyclic Olefin Polymer (COP), cyclic Olefin Copolymer (COC), or any combination thereof, in addition, the protective film may be further subjected to a surface treatment, such as, but not limited to, an anti-glare treatment, an anti-reflection treatment, a hard coating treatment, a charge prevention treatment, or an anti-smudge treatment, etc. in some embodiments, the films 20 and 24 are, for example, film layers that are useful for optical gain, alignment, compensation, turning, orthogonality, diffusion, anti-sticking, scratch-resistant, anti-glare, reflection suppression, high refractive index, etc., such as a phase difference film.
In some embodiments, the film 22 is a polarized film. The material of the polarizing film may be a polyvinyl alcohol (PVA) resin film, which can be prepared by saponifying a polyvinyl acetate resin. Such as, but not limited to, vinyl acetate monopolymers (i.e., polyvinyl acetate) and copolymers of vinyl acetate with other monomers copolymerizable with vinyl acetate.
At least two films 20, 22, and 24 to be bonded to each other are bonded together with an ultraviolet-curable adhesive. After the laminated film 26 is laminated, the ultraviolet curable adhesive is irradiated by the ultraviolet irradiation device 200 and cured, thereby achieving the effect of bonding.
In some embodiments, the material of the uv curable adhesive may include at least one of an acrylic adhesive, an epoxy adhesive, a urethane adhesive, a polyester adhesive, a polyvinyl alcohol adhesive, a polyolefin adhesive, a modified polyolefin adhesive, a polyvinyl alkyl ether adhesive, a rubber adhesive, a vinyl chloride-vinyl acetate adhesive, an SEBS (styrene-ethylene-butylene-styrene copolymer) adhesive, a vinyl adhesive such as an ethylene-styrene copolymer, and an acrylate adhesive such as an ethylene-methyl (meth) acrylate copolymer and an ethylene-ethyl (meth) acrylate copolymer, but is not limited thereto.
The ultraviolet irradiation apparatus 200 of the present invention is used for curing an ultraviolet-curable adhesive. The ultraviolet irradiation device 200 includes a first ultraviolet irradiation part 210 and a second ultraviolet irradiation part 220. The first ultraviolet irradiation part 210 emits the first ultraviolet light L1 by an electrode lamp. The second ultraviolet light irradiation part 220 is disposed at a downstream side of the first ultraviolet light irradiation part 210, and emits the second ultraviolet light L2 with the electrodeless lamp. In the present invention, the amount of the UVB product light of the first ultraviolet light L1 and the second ultraviolet light L2 (i.e., the sum of the amount of the UVB light of the first ultraviolet light L1 and the amount of the UVB light of the second ultraviolet light L2) is 200mJ/cm 2 To 300mJ/cm 2 And UVB light amount of the first ultraviolet light L1: the amount of UVB light of the second ultraviolet light L2 is 1:2 to 1:3.
the lamp with electrode and the lamp without electrode are two general ultraviolet lamps with different structures. The dominant wavelength band of light emitted by the electrodeless lamp is in the UVA band. The light emitted by the lamp with the electrode is distributed more uniformly in the UVB wave band. Therefore, the combination of the two can cover a wider ultraviolet light wave band, and the photoinitiator in the ultraviolet curing adhesive can be irradiated by more complete ultraviolet light. Furthermore, albeit someThe ultraviolet curing type adhesives such as epoxy type ultraviolet curing type adhesives mainly absorb UVB, but the lamp with electrode generally has high heat energy, and the polarizer is easily curled by using only the lamp with electrode to provide sufficient light energy. If the energy is reduced and the electrodeless lamp is used for assistance, the ultraviolet curing adhesive can be completely cured and achieve the effect of high adhesion under the condition of avoiding the curling of the polarizing plate. The UVB light quantity of the first ultraviolet light L1 emitted by the lamp with electrodes according to the present invention: the amount of UVB light of the second ultraviolet light L2 emitted from the electrodeless lamp is 1:2 to 1: a ratio of 3 is advantageous in this case. Further, according to the present invention, the UVB integrated light amount of the first ultraviolet light L1 and the second ultraviolet light L2 falls within 200mJ/cm 2 To 300mJ/cm 2 In the range of (1). If the UVB integrated light amount is too low, the hardening of the ultraviolet curing type adhesive may be incomplete. When the amount of UVB light is too high, the polarizing plate may suffer from problems such as curling or yellowing. According to some embodiments, the electrode lamp may be selected from the group consisting of an ultra-high pressure mercury xenon short arc lamp, a high pressure mercury lamp, a metal halide lamp, a high pressure xenon arc lamp, a low pressure mercury lamp, an ultraviolet fluorescent lamp, an excimer lamp, a deuterium lamp, and a high pressure sodium lamp. According to some embodiments, the electrodeless lamp may be selected from the group consisting of a D-bulb (D bulb), an H-bulb (H bulb), and a V-bulb (V bulb). In some embodiments, the amount of UVB light of the second ultraviolet light L2 can be further limited to 180 to 220mJ/cm 2 . In some embodiments, the UVB illumination of the first and second ultraviolet light L1, L2 is 1mW/cm 2 To 1000mW/cm 2 . Either too high or too low illumination may adversely affect the polarizing plate. In some embodiments, the optically transmissive color shade b of the polarizer 26 manufactured by the present invention is 2NBS to 5NBS. Single b refers to the position in CIELAB color space between yellow and blue (negative values of b indicate blue and positive values indicate yellow). If the amount of UVB accumulated light is too high, the polarizing plate may be yellowed, resulting in an optically transmissive hue single b exceeding the range of 2NBS to 5NBS.
The first ultraviolet light irradiation section 210 may include one or more irradiation units 212, and the second ultraviolet light irradiation section 220 may include one or more irradiation units 222, as long as the first ultraviolet light L1 emitted by the first ultraviolet light irradiation section 210 as a whole and the second ultraviolet light L2 emitted by the second ultraviolet light irradiation section 220 as a whole satisfy the conditions described herein.
According to some embodiments, the polarizing plate laminating apparatus 10 may further include a plurality of rollers 300 for conveying the films 20, 22, 24 and the laminate film 26. The transport direction is indicated by arrow 310.
According to some embodiments, the polarizing plate laminating apparatus 10 may further include a coating device 400. For coating the ultraviolet curing adhesive A on at least one adhesion surface of a plurality of films of the polarizing plate. In fig. 1, two coating apparatuses 400 respectively coat the ultraviolet-curable adhesive a onto the films 20 and 24 to be bonded to the film 22. However, the present invention is not limited thereto. For example, the coating apparatus 400 may also coat the ultraviolet curing adhesive a on the side of the film 22 to be bonded to the films 20 and 24. The material of the ultraviolet curable adhesive a may include, but is not limited to, an acrylic adhesive, an epoxy adhesive, a urethane adhesive, a polyester adhesive, a polyvinyl alcohol adhesive, a polyolefin adhesive, a modified polyolefin adhesive, a polyvinyl alkyl ether adhesive, a rubber adhesive, a vinyl chloride-vinyl acetate adhesive, an SEBS (styrene-ethylene-butylene-styrene copolymer) adhesive, a vinyl adhesive such as an ethylene-styrene copolymer, and at least one of an acrylic adhesive such as an ethylene-methyl (meth) acrylate copolymer and an ethylene-ethyl (meth) acrylate copolymer.
According to some embodiments, the polarizing plate laminating apparatus 10 may further include a cooling roller 500 disposed at an opposite side of the ultraviolet irradiation device 200. The cooling roller 500 is used to assist in cooling the laminate 26 and prevent the laminate 26 from being damaged by the high temperatures generated by the uv energy.
The ultraviolet light irradiation device and the polarizing plate laminating apparatus of the present invention have been described in detail above. The method for attaching a polarizing plate according to the present invention will be described below, and for clarity, it will be described with reference to fig. 1.
The method for laminating the polarizing plate comprises the following stepsAnd (5) carrying out a step. First, a plurality of films 20, 22, 24 of polarizing plates are provided. An ultraviolet-curable adhesive A is applied to at least one of the adhesive surfaces of the films 20, 22, 24. Next, these films 20, 22, 24 are laminated to form a laminate film 26. The laminate film 26 is irradiated with the first ultraviolet light L1 emitted from the lamp with electrodes to partially cure the ultraviolet curing adhesive A. After the laminated film is irradiated with the first ultraviolet light L1, the laminated film is irradiated with a second ultraviolet light L2 emitted from an electrodeless lamp to completely cure the ultraviolet curable adhesive a. The UVB light product quantity of the first ultraviolet light L1 and the second ultraviolet light L2 is 200mJ/cm 2 To 300mJ/cm 2 And UVB light amount of the first ultraviolet light L1: the amount of UVB light of the second ultraviolet light L2 is 1:2 to 1:3.
in some embodiments, the uv-curable adhesive a may be an epoxy-type uv-curable adhesive. The UVB illuminance of the first and second ultraviolet light L1 and L2 may be 1mW/cm 2 To 1000mW/cm 2 . In some embodiments, the optically transmissive color shade b of the polarizer 26 manufactured by the present invention is 2NBS to 5NBS. Single b refers to the position in CIELAB color space between yellow and blue (negative values of b indicate blue and positive values indicate yellow). If the amount of UVB accumulated light is too high, the polarizing plate may be yellowed, resulting in an optically transmissive hue single b exceeding the range of 2NBS to 5NBS. Other details are provided in the above embodiments related to the ultraviolet light irradiation device and the polarizer attaching apparatus, and are not described herein again.
In order to further understand the effects of ultraviolet light emitted by both electrode-based and electrodeless lamps, relevant experimental test results are also provided herein. Experiments were conducted in which a D-type bulb was used as an electrodeless lamp and a metal halide lamp was used as an electrode lamp, the amount of light was adjusted, the peel strength and the optically transmissive color shade b of the polarizing plate 26 manufactured by the present invention were tested, and whether other adverse phenomena occurred or not was observed. The parameters and results are shown in Table 1.
TABLE 1
The UVB integrated light amount and the UVB light amount ratio of the ultraviolet light emitted from the electrodeless lamps and the electrodeless lamps of examples 1 to 3 were within the range proposed by the present invention, followed by good strength, and no other adverse phenomenon was observed. In comparative example 1, curing of the adhesive was performed using low illuminance and low light amount in the production of the polarizing plate, and the problem of incomplete curing of the adhesive occurred. In comparative example 2, when UVB was used at a high illuminance and a high light amount, the polarizing plate had curl and yellowing, although the adhesion was not significantly different from that of the examples.
In summary, in the present invention, the ultraviolet light emitted from the lamp with electrode and the lamp without electrode is used in combination to control the ratio of the UVB integrated light quantity and the UVB light quantity, so as to improve the adhesion property and avoid the problems of poor appearance of the polarizing plate. Therefore, it is possible to improve the occurrence of poor adhesion and defects by adjusting the light distribution in the polarizing plate laminating apparatus without developing and adjusting the adhesive component and the polarizing plate constituting member.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An ultraviolet irradiation apparatus for curing an ultraviolet-curable adhesive, comprising:
a first ultraviolet light irradiation part for emitting a first ultraviolet light by an electrode lamp; and
a second ultraviolet light irradiation section which is provided on the downstream side of the first ultraviolet light irradiation section and emits a second ultraviolet light by an electrodeless lamp;
wherein the UVB light product amount of the first ultraviolet light and the second ultraviolet light is 200mJ/cm 2 To 300mJ/cm 2 And the UVB light amount of the first ultraviolet light: the amount of UVB light of the second ultraviolet light is 1:2 to 1:3.
2. the ultraviolet light irradiation apparatus as set forth in claim 1, wherein the amount of UVB light of the second ultraviolet light is 180 to 220mJ/cm 2 。
3. The ultraviolet light irradiation apparatus according to claim 1, wherein the UVB illuminance of the first ultraviolet light and the second ultraviolet light is 1mW/cm 2 To 1000mW/cm 2 。
4. The ultraviolet light irradiation apparatus of claim 1, wherein the electrodeless lamp is selected from the group consisting of an ultra-high pressure mercury xenon short arc lamp, a high pressure mercury lamp, a metal halide lamp, a high pressure xenon arc lamp, a low pressure mercury lamp, an ultraviolet fluorescent lamp, an excimer lamp, a deuterium lamp, and a high pressure sodium lamp, and/or wherein the electrodeless lamp is selected from the group consisting of a D-bulb, an H-bulb, and a V-bulb.
5. A polarizing plate laminating apparatus, comprising:
a bonding device; and
the ultraviolet light irradiation apparatus according to any one of claims 1 to 4, which is disposed downstream of the bonding apparatus.
6. A method for attaching a polarizing plate, comprising:
providing a plurality of films of a polarizing plate;
coating an ultraviolet curing adhesive on at least one bonding surface of the films;
bonding the films to form a laminated film;
irradiating the laminated film with a first ultraviolet ray emitted from an electrode lamp to partially cure the ultraviolet-curable adhesive; and
irradiating the laminated film with a second ultraviolet light emitted from an electrodeless lamp after irradiating the laminated film with the first ultraviolet light to completely cure the ultraviolet curing adhesive;
wherein the first ultraviolet light and the second ultraviolet lightThe UVB integrated light quantity is 200mJ/cm 2 To 300mJ/cm 2 And the UVB light amount of the first ultraviolet light: the amount of UVB light of the second ultraviolet light is 1:2 to 1:3.
7. the method of attaching a polarizing plate according to claim 6, wherein the material of the ultraviolet-curable adhesive comprises at least one of an acrylic adhesive, an epoxy adhesive, a urethane adhesive, a polyester adhesive, a polyvinyl alcohol adhesive, a polyolefin adhesive, a modified polyolefin adhesive, a polyvinyl alkyl ether adhesive, a rubber adhesive, a vinyl chloride-vinyl acetate adhesive, an SEBS ((styrene-ethylene-butylene-styrene copolymer) adhesive, a vinyl adhesive, and an acrylate adhesive.
8. The method of claim 6, wherein the first UV light and the second UV light have a UVB illuminance of 1mW/cm 2 To 1000mW/cm 2 。
9. The method of claim 6, wherein the lamp with electrodes is selected from the group consisting of an ultra-high pressure mercury xenon short arc lamp, a high pressure mercury lamp, a metal halide lamp, a high pressure xenon arc lamp, a low pressure mercury lamp, an ultraviolet fluorescent lamp, an excimer lamp, a deuterium lamp, and a high pressure sodium lamp, and/or wherein the electrodeless lamp is selected from the group consisting of a D-bulb, an H-bulb, and a V-bulb.
10. The method of claim 6, wherein the amount of UVB light of the second UV is 180-220 mJ/cm 2 。
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111106803 | 2022-02-24 | ||
| TW111106803A TWI785994B (en) | 2022-02-24 | 2022-02-24 | Ultraviolet light irradiation device, polarizing plate laminating apparatus using the same, and polarizing plate laminating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115555230A true CN115555230A (en) | 2023-01-03 |
Family
ID=84768065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211369137.5A Pending CN115555230A (en) | 2022-02-24 | 2022-11-03 | Ultraviolet irradiation device, polarizing plate bonding apparatus using same, and polarizing plate bonding method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115555230A (en) |
| TW (1) | TWI785994B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874943A (en) * | 2011-10-07 | 2014-06-18 | 住友化学株式会社 | Method for manufacturing polarizer |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101815347B1 (en) * | 2011-10-28 | 2018-01-04 | 스미또모 가가꾸 가부시키가이샤 | Method for manufacturing polarizing plate, and apparatus for manufacturing polarizing plate |
| JPWO2014010511A1 (en) * | 2012-07-12 | 2016-06-23 | 住友化学株式会社 | Manufacturing method of polarizing plate |
| KR101830557B1 (en) * | 2013-09-30 | 2018-02-20 | 후지필름 가부시키가이샤 | Light-shielded rolled film, method for producing light-shielded rolled film, rolled film containing thermal polymerization initiator, method for producing rolled film containing thermal polymerization initiator, hard coat film, method for producing hard coat film, polarizing plate and liquid crystal display device |
-
2022
- 2022-02-24 TW TW111106803A patent/TWI785994B/en active
- 2022-11-03 CN CN202211369137.5A patent/CN115555230A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874943A (en) * | 2011-10-07 | 2014-06-18 | 住友化学株式会社 | Method for manufacturing polarizer |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI785994B (en) | 2022-12-01 |
| TW202334581A (en) | 2023-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6588398B2 (en) | Protective film for polarizing plate and polarizing plate using the same | |
| JP5887080B2 (en) | Light diffusing film and manufacturing method thereof, light diffusing polarizing plate, and liquid crystal display device | |
| CN107209299B (en) | Wavelength conversion member, backlight unit provided with same, liquid crystal display device, and method for manufacturing wavelength conversion member | |
| JP5495906B2 (en) | Photocurable adhesive composition, polarizing plate and method for producing the same, optical member and liquid crystal display device | |
| JP6403936B2 (en) | Polarizing plate and liquid crystal display panel using the same | |
| WO2011162133A1 (en) | Light-diffusing polarization plate and liquid-crystal display device | |
| JP6481728B2 (en) | Polarizing plate and liquid crystal display panel using the same | |
| KR20060116016A (en) | Light diffusion film, surface light source and liquid crystal display | |
| JP4500522B2 (en) | Laminate that suppresses curling of hard coat layer | |
| JP2006163082A (en) | Optical member, manufacturing method thereof and liquid crystal display device | |
| JP2012208187A (en) | Method for manufacturing polarizing plate | |
| JP2013113896A (en) | Hard coat film, polarizing plate, image display device, method for improving adhesion of hard coat layer and method for manufacturing hard coat film | |
| JP2010185968A (en) | Polarizing plate, liquid crystal panel using the same and liquid crystal display apparatus | |
| CN115555230A (en) | Ultraviolet irradiation device, polarizing plate bonding apparatus using same, and polarizing plate bonding method | |
| JP6217365B2 (en) | OPTICAL LAMINATE, MANUFACTURING METHOD THEREOF, AND POLARIZING PLATE AND IMAGE DISPLAY DEVICE USING THE SAME | |
| CN110609349B (en) | Method for manufacturing liquid crystal film and method for manufacturing optical laminate | |
| JP7122168B2 (en) | Laminate with Adhesive Layer, Laminate, Liquid Crystal Layer Laminate, Method for Producing Liquid Crystal Film, and Method for Producing Optical Laminate | |
| KR20170032188A (en) | Method for producing laminated optical film | |
| KR101875244B1 (en) | Optical film manufacturing method, polarizing plate, and image display device | |
| JP7014418B2 (en) | Optical laminate and its manufacturing method | |
| TW202113403A (en) | Laminated optical film and image display device laminated with at least a polarizer and a second optical film with an adhesive layer in between | |
| TW202115439A (en) | Laminated optical film and image display device having the same refractive index on both sides of the optical film | |
| JP2017146431A (en) | Method for manufacturing laminate and method for manufacturing polarizing plate, and laminate | |
| JP5950002B2 (en) | Manufacturing method of polarizing plate | |
| JP2013205743A (en) | Method and apparatus for manufacturing polarizing plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20230103 |
|
| RJ01 | Rejection of invention patent application after publication |