KR102055647B1 - Uv system and method for preventing crack of polarizing plate - Google Patents

Uv system and method for preventing crack of polarizing plate Download PDF

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Publication number
KR102055647B1
KR102055647B1 KR1020160001254A KR20160001254A KR102055647B1 KR 102055647 B1 KR102055647 B1 KR 102055647B1 KR 1020160001254 A KR1020160001254 A KR 1020160001254A KR 20160001254 A KR20160001254 A KR 20160001254A KR 102055647 B1 KR102055647 B1 KR 102055647B1
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KR
South Korea
Prior art keywords
polarizing plate
protective film
curing
coating
resin
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KR1020160001254A
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Korean (ko)
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KR20170082081A (en
Inventor
최재훈
최항석
신익준
장응진
김훈열
Original Assignee
주식회사 엘지화학
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Priority to KR1020160001254A priority Critical patent/KR102055647B1/en
Publication of KR20170082081A publication Critical patent/KR20170082081A/en
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    • 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
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—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
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
    • B32B2310/0831—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using UV radiation

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Polarising Elements (AREA)

Abstract

In one embodiment of the present invention can be provided a UV system for the production of anti-crack polarizing plate. UV system according to an embodiment of the present invention is a polarizing plate transport unit for transporting a polarizing plate, a protective film transport unit for transporting a protective film to be combined with the polarizing plate, a resin coating unit for coating a resin on the protective film, a polarizing plate and It may include a lamination portion for laminating the protective film and a curing portion for inducing curing for the laminated polarizing plate and the protective film.

Description

UV system and method for manufacturing the anti-branch polarizing plate {UV SYSTEM AND METHOD FOR PREVENTING CRACK OF POLARIZING PLATE}

The present invention relates to a UV system for producing a non-branching polarizing plate and a method of manufacturing the polarizing plate, and more particularly to a UV system and a method for manufacturing the same for effectively preventing the splitting under the polarizing plate.

Recently, thanks to the explosive development of optical technology, various thin-film display devices such as organic light emitting diode display (OLED), liquid crystal display (LCD), and plasma display (PDP) have been introduced. Such thin-film display devices are thinner, lighter, and capable of operating under low power, compared to conventional CRT CRTs, and their utilization is increasing in Braille. Such thin film display devices generally have a structure including a polarizing plate for providing specific polarization to a display panel, and the polarizing plate includes a polarizer and a protective film that may be attached to one or both sides of the polarizer to protect the polarizer. It can be configured to.

The LCD manufactured according to the conventional LCD manufacturing process may be manufactured as shown in FIG. 1. In other words, the LCD may be formed of an upper polarizer, an LCD panel, a lower polarizer, a pressure sensitive adhesive (PSA), a protective film, an antifouling function, and an AS (anti-static) function. Here, the lower polarizer may be a CLR type or AG type polarizer. When a CLR type polarizer is used, the polarizer is divided by contact between a triacyl cellulose (TAC) and a prism included in the CLR type polarizer after removing the PET protective film. Problems may arise. In addition, when an AG type polarizing plate is used, there is a problem that the manufacturing cost is increased by performing AG (Anti-Glare) or H / C (Hard Coating) coating through TAC through a separate process.

In order to solve the above-described problems of the present invention, to prevent the separation of the polarizing plate by providing a resin layer on the protective film in the polarizing plate stretching process without using a separate H / C or AG coated substrate.

According to one embodiment of the present invention, a UV system for manufacturing a non-branching polarizing plate and a method for manufacturing a polarizing plate using the UV system may be provided.

UV system for manufacturing a non-crack polarizing plate according to an embodiment of the present invention, a polarizing plate transport unit for transporting a polarizing plate, a protective film transport unit for transporting a protective film to be combined with the polarizing plate, to coat the resin on the protective film It may include a resin coating for, a lamination for laminating the polarizing plate and the protective film and a curing portion for inducing curing for the laminated polarizing plate and the protective film.

The protective film is formed of at least one of polyethylene terephthalate (PET), polypropylene (PP), and polyethylene (PE), and the protective film base surface may be coated with at least one functional layer for antifouling and AS.

The resin coating unit may form a resin layer by coating a UV curable resin or a thermosetting resin on the protective film.

As the UV curable resin, at least one of acrylic, urethane, vinyl and epoxy resins may be mixed and used in monomer or polymer form.

Coating of the UV curable resin or thermosetting resin may be carried out by gravure coating, micro gravure coating, lip die coating, comma coating or bar coating.

The curing unit may perform UV curing or thermosetting on the laminated polarizing plate and the protective film.

In order to peel off the protective film from the polarizing plate, the curing unit may selectively perform UV curing or thermal curing based on the peeling force according to the curing previously performed on the polarizing plate and the protective film.

Method for producing a anti-crack polarizing plate according to an embodiment of the present invention, the step of transporting the polarizing plate, transporting a protective film to be combined with the polarizing plate to be transported, coating a resin on the protective film, the polarizing plate and the protective film It may include the step of laminating and curing the laminated polarizing plate and the protective film.

Using a UV system for the production of anti-crack polarizing plate according to an embodiment of the present invention, it is possible to impart a resin layer on a protective film in a polarizing plate stretching process without using a separate H / C or AG coated substrate. Thereby, the anti-cracking performance of a polarizing plate can be improved.

In addition, according to an embodiment of the present invention, when the protective film peeled from the anti-crack polarizing plate, it is possible to peel off the protective film relatively easily while minimizing damage to the polarizing plate compared with the conventional.

1 shows the structure of an LCD manufactured according to a conventional manufacturing method.
2 is a block diagram of a UV system for manufacturing a non-crack polarizing plate according to an embodiment of the present invention.
Figure 3 shows the operation of the UV system for producing a non-crack polarizing plate according to an embodiment of the present invention.
4 illustrates a structure of an LCD manufactured according to an embodiment of the present invention.
5 is a flowchart illustrating a method of manufacturing a anti-crack polarizing plate according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Terms used herein will be briefly described and the present invention will be described in detail.

The terms used in the present invention have been selected as widely used general terms as possible in consideration of the functions in the present invention, but this may vary according to the intention or precedent of the person skilled in the art, the emergence of new technologies and the like. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents throughout the present invention, rather than the names of the simple terms.

When any part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated. In addition, the terms "... unit", "module", etc. described in the specification mean a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software. . In addition, when a part of the specification is "connected" to another part, this includes not only "directly connected", but also "connected with other elements in the middle".

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The polarizer may be attached to the top and the bottom of the display panel as a material constituting the TFT-LCD and serve to pass or block light from the display panel. In such a display panel, information may be displayed by adjusting the amount of light transmitted according to the change of the state of the liquid crystal and the polarization property of the polarizer.

In general, the polarizing plate is a multilayer composite film having a thickness of about 300 micrometers (um) and composed of a PVA (Poly-Vinyl Alcohol) layer in which iodine is incubated, a TAC for protecting PVA, a PSA, a protective layer, and a release film, and a release film. Can be. Such a polarizing plate may be utilized in a device for visually providing information such as a TV and a monitor.

Figure 2 is a block diagram of a UV system for the anti-cracking polarizer according to an embodiment of the present invention, Figure 3 shows the operation of the UV system for manufacturing a non-cracking polarizing plate according to an embodiment of the present invention. 4 shows the structure of an LCD manufactured according to an embodiment of the present invention.

 UV system 1000 for manufacturing the anti-crack polarizing plate according to an embodiment of the present invention, the polarizing plate transport unit 1100 for transporting the polarizing plate, the protective film transport unit 1200 for transporting the protective film to be combined with the polarizing plate The resin coating unit 1300 for coating the resin on the protective film, the lamination unit 1400 for laminating the polarizing plate and the protective film and the curing unit 1500 for inducing curing of the laminated polarizing plate and the protective film It may include.

According to one embodiment of the present invention, it is possible to effectively prevent the polarization of the polarizing plate by forming a resin layer on the protective film in the polarizing plate stretching process without using a separate H / C or AG coated substrate. In other words, according to one embodiment of the present invention, a resin layer may be formed by coating a UV curable or thermosetting resin on a protective film. Since the formed resin layer may be laminated on the polarizing plate together with the protective film, the polarizing plate protection function may be performed such as to prevent the polarization of the polarizing plate.

The protective film is formed of at least one of polyethylene terephthalate (PET), polypropylene (PP), and polyethylene (PE), and the protective film base surface may be coated with at least one functional layer for antifouling and AS. The thickness of the protective film may be 10 to 200 micrometers (um), but is not necessarily limited thereto. Preferably the thickness of the protective film may be 10 to 100 micrometers.

The resin coating unit 1300 may form a resin layer by coating a UV curable resin or a thermosetting resin on the protective film.

As the UV curable resin, at least one of acrylic, urethane, vinyl and epoxy resins may be mixed and used in monomer or polymer form. The thickness of the resin layer may be 0.5 to 50 micrometers, but is not necessarily limited thereto. The thickness of the resin layer may preferably be 1 to 20 micrometers.

The AS function of the resin layer may be 10 ^ 7 to 10 ^ 13 Ω / □ (ohm / sq.). Preferably, the AS function of the resin layer may be 10 ^ 9 to 10 ^ 12 Ω / □.

In addition, at least one of a hard coating agent, an AS (anti-static) agent, a slip agent, a sunscreen agent, an ultraviolet absorber, and an antireflective additive may be mixed with the UV curable resin or the thermosetting resin. In other words, in the production of the polarizing plate, a resin in which the aforementioned materials are mixed may be used.

Referring to FIG. 4, a substrate formed of at least one of TAC, acrylic, cyclo olefin polymer (COP), PET, and PC may be disposed on the lower polarizer. In addition, a non-UV film may be disposed on the lower polarizer. The ASHC layer of FIG. 4 may be an anti-static hard coating layer.

Coating of the UV curable resin or thermosetting resin may be carried out by gravure coating, micro gravure coating, lip die coating, comma coating or bar coating.

The curing unit 1500 may perform UV curing or thermosetting on the laminated polarizing plate and the protective film. The hardness of the UV curable resin or thermosetting resin may be 1 to 4H, but is not necessarily limited thereto. In other words, the hardness of the cured resin is sufficient if the hardness for curing the protective film and the polarizing plate may be preferably 2 to 3H.

In order to peel off the protective film from the polarizing plate, the curing unit 1500 may selectively perform UV curing or thermal curing based on the peeling force according to curing previously performed on the polarizing plate and the protective film. According to an embodiment of the present invention, when the protective film is to be peeled off from the polarizing plate manufactured to prevent the splitting, the resin coating layer of the protective film and the surface may be easily separated through additional UV curing or heat curing. In other words, depending on the peeling force by the previously performed curing, UV curing or thermal curing may not be performed or may be additionally performed. For example, the peel force after the primary UV curing or thermosetting on the manufacturing process of the polarizing plate may be 2gf / 25mm to 80gf / 25mm. Preferably it may be 10gf / 25mm to 50gf / 25mm. Secondary curing may not be performed when the peel force after the primary UV curing or thermosetting is included in the range of 5 gf / 25mm to 20 gf / 25mm. In addition, if additional UV curing or heat curing is performed before peeling off the protective film on the finished polarizing plate, the peel force may be, for example, 2gf / 25mm to 50gf / 25mm, preferably 5gf / 25mm to 20gf / 25mm.

5 is a flowchart illustrating a method of manufacturing a anti-crack polarizing plate according to an exemplary embodiment of the present invention.

Method of manufacturing a anti-crack polarizing plate according to an embodiment of the present invention, the step of transporting the polarizing plate (S100), the step of transporting a protective film to be combined with the polarizing plate to be transported (S200), coating a resin on the protective film Step (S300), the step of laminating the polarizing plate and the protective film (S400) and the step of curing the laminated polarizing plate and the protective film (S500).

With regard to the method according to an embodiment of the present invention, the above description of the system may be applied. Therefore, with respect to the method, the same content as that for the above-described system has been omitted.

The above description of the present invention is intended for illustration, and it will be understood by those skilled in the art that the present invention may be easily modified in other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1100: polarizer transport unit
1200: protective film transport
1300: resin coating
1400: lamination
1500: hardened part
1000: UV system for the manufacture of anti-branch polarizers

Claims (8)

In the UV system for manufacturing anti-crack polarizer,
Polarizing plate transport unit for transporting the polarizing plate;
A protective film transport unit for transporting a protective film to be combined with the polarizing plate;
A resin coating part for coating a resin on the protective film;
A lamination portion for laminating the polarizing plate and the protective film; And
It includes a curing unit for inducing curing for the laminated polarizing plate and the protective film,
In the curing unit UV curing or thermal curing is performed for the laminated polarizing plate and the protective film,
In order to peel the protective film from the polarizing plate, the curing unit determines whether or not to perform additional curing based on the peeling force according to the curing previously performed on the polarizing plate and the protective film, and the additional curing is performed by UV curing and heat. UV system for producing a non-branching polarizing plate, characterized in that any one of the curing.
The method of claim 1,
The protective film is formed of at least one of polyethylene terephthalate (PET), polypropylene (PP), and polyethylene (PE),
The protective film substrate surface UV coating system for the production of anti-crack polarizing plate, characterized in that the functional layer for antifouling and AS is coated with at least one layer.
The method of claim 1,
The resin coating unit is a UV system for manufacturing a anti-crack polarizing plate, characterized in that to form a resin layer by coating a UV curable resin or a thermosetting resin on the protective film.
The method of claim 3, wherein
The UV curable resin is a UV system for manufacturing a non-branching polarizing plate, characterized in that at least one of acrylic, urethane, vinyl and epoxy resins are mixed and used in monomer or polymer form.
The method of claim 3, wherein
Coating of the UV curable resin or thermosetting resin is a UV system for manufacturing a non-branching polarizing plate, characterized in that can be carried out by gravure coating, micro gravure coating, lip die coating, comma coating or bar coating.
delete delete In the method of manufacturing the anti-crack polarizing plate,
Transporting the polarizing plate;
Transporting a protective film to be combined with the transported polarizing plate;
Coating a resin on the protective film;
Laminating the polarizing plate and the protective film; And
Hardening the laminated polarizing plate and a protective film;
In the curing step, UV curing or thermosetting is performed on the laminated polarizing plate and the protective film, and in the curing step, the curing is performed previously on the polarizing plate and the protective film to peel the protective film from the polarizing plate. Based on the peeling force according to the method of manufacturing a non-branching polarizing plate, characterized in that whether or not to perform any of the additional curing of the UV curing and thermosetting.

KR1020160001254A 2016-01-05 2016-01-05 Uv system and method for preventing crack of polarizing plate KR102055647B1 (en)

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KR102055647B1 true KR102055647B1 (en) 2019-12-13

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100838345B1 (en) * 2006-02-17 2008-06-13 에스케이씨하스디스플레이필름(유) Composition of Coating for Surface Protection and Protective Film Using Same
KR100938342B1 (en) * 2007-12-17 2010-01-22 주식회사 엘지화학 Polarizer and Production Process thereof

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