KR20160038382A - Optical film and method for preparing the same - Google Patents
Optical film and method for preparing the same Download PDFInfo
- Publication number
- KR20160038382A KR20160038382A KR1020140131397A KR20140131397A KR20160038382A KR 20160038382 A KR20160038382 A KR 20160038382A KR 1020140131397 A KR1020140131397 A KR 1020140131397A KR 20140131397 A KR20140131397 A KR 20140131397A KR 20160038382 A KR20160038382 A KR 20160038382A
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- South Korea
- Prior art keywords
- film
- polyolefin
- base film
- polyvinyl alcohol
- rubber resin
- Prior art date
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/0073—Optical laminates
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
- C09J129/02—Homopolymers or copolymers of unsaturated alcohols
- C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
Abstract
Description
The present invention relates to an optical film and a method for producing the optical film.
The polarizing plate is used inside and outside the liquid crystal cell for the purpose of controlling the direction of light oscillation in order to visualize the display pattern of the liquid crystal display device. Liquid crystal display devices have been used in a wide range from small-sized devices at the beginning of development to notebook computers, liquid crystal monitors, liquid crystal color projectors, liquid crystal televisions, navigation systems for vehicles, personal phones, and measurement devices used indoors and outdoors Respectively. Particularly, liquid crystal monitors, liquid crystal televisions, and the like are often used in high luminance backlights among applications of liquid crystal display devices.
2. Description of the Related Art In recent years, in accordance with the trend toward thinness of display devices, internal components are also required to be thin. Therefore, the polarizing film used for the polarizing plate has been required to be thinner than the conventional polarizing film.
Accordingly, there is a demand for an optical film including a polarizing film which is thin and capable of exhibiting excellent optical characteristics, and a method for producing the optical film.
Accordingly, it is an object of the present invention to provide a manufacturing method for easily manufacturing an optical film including a thin film polarizing film.
It is another object of the present invention to provide a method for producing an optical film that can simplify the manufacturing process of an optical film including a thin film polarizing film.
The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing the same.
According to another aspect of the present invention, there is provided a method of manufacturing an optical film, the method comprising: forming a laminated film by attaching a polyvinyl alcohol film to at least one surface of a base film; and stretching the laminated film And the base film may include a polyolefin-based rubber resin.
The polyolefin-based rubber resin may include at least one of a thermoplastic polyurethane, a styrene butadiene rubber, and an acrylate rubber.
The base film and the polyvinyl alcohol-based film may be attached via a force.
The attractive force may range from 80 g f / 25 mm to 250 g f / 25 mm.
The base film includes a skin layer formed on a surface in contact with the polyvinyl alcohol-based film, and the polyolefin-based rubber resin may be included in the skin layer.
The base film may be a coextruded film including the skin layer.
The polyolefin-based rubber resin is a polyolefin- And may be contained in an amount ranging from 1% by weight to 20% by weight.
Wherein the polyolefinic rubber resin is in the form of an alternative copolymer, and the base film and the polyvinyl alcohol-based film are attached via a pulling force, and the pulling force is 200 gf / 25 mm to 250 gf / 25mm Lt; / RTI >
Wherein the polyolefin-based rubber resin is in the form of a block copolymer, and the base film and the polyvinyl alcohol-based film are attached via gravities, and the attracting force is 80 gf / 25 mm to 150 gf / 25mm Lt; / RTI >
The method may further include the step of depositing the laminated film on at least one of iodine and a dichroic dye.
And removing the base film from the stretched laminated film to obtain a thin film polarizing film.
According to an aspect of the present invention, there is provided a laminated film comprising a stretched base film, and a thin film polarizing film stretched on at least one side of the base film and attached via a pulling force, Based rubber resin.
The base film and the thin film polarizing film may be attached via attraction force.
The base film is a coextrusion film including a skin layer formed on a surface in contact with the thin film polarizing film, and the polyolefin rubber resin may be included on the skin layer.
In order to achieve the above object, an optical film according to an embodiment of the present invention is manufactured by the above-described manufacturing method and may include a thin film polarizing film having a thickness of 0.5 탆 to 15 탆.
The details of other embodiments are included in the detailed description and drawings.
The embodiments of the present invention have at least the following effects.
The optical film of the present invention can include a polarizing film having excellent optical characteristics while simplifying the manufacturing process.
In addition, the method for producing an optical film of the present invention can produce an optical film comprising a polarizing film having excellent optical properties while being easy to process.
The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.
1 is a cross-sectional view of a laminated film according to an embodiment of the present invention.
2 is a cross-sectional view of a laminated film according to another embodiment of the present invention.
3 is a cross-sectional view showing a process of separating a polarizing film in the laminated film of FIG.
BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.
It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between. Like reference numerals refer to like elements throughout the specification.
Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.
It should also be understood that the steps constituting the manufacturing method described herein may be sequential or sequential, or one step and the other step constituting one manufacturing method may be performed in the order described in the specification It is not construed as limited. Therefore, the order of the steps of the manufacturing method can be changed within a range that can be easily understood by a person skilled in the art, and a change apparent to a person skilled in the art accompanying thereto is included in the scope of the present invention.
Optical film manufacturing method
FIG. 1 is a cross-sectional view of a laminated film produced according to a method of manufacturing an optical film according to an embodiment of the present invention. Hereinafter, a method of manufacturing an optical film according to an embodiment of the present invention will be described with reference to a red side film of FIG.
1, a method of manufacturing an optical film according to an embodiment of the present invention includes the steps of: attaching a
Generally, when a polyvinyl alcohol film is stretched using a base film, an adhesive agent must be separately applied between the base film and the polyvinyl alcohol film. In this case, a separate step of applying the adhesive agent is performed. Therefore, the process time is lengthened and the operation cost is increased, resulting in an increase in the unit price of the product.
Accordingly, the present invention can attach the base film (10) and the polyvinyl alcohol film (20) by gravitational force by using the base film (10) comprising the polyolefin rubber resin, whereby a separate adhesive The polarizing film can be produced without using it.
More specifically, the method of producing an optical film of the present invention will be described. In the step of forming a laminated film, the
The attracting force may be attached with an attractive force to easily separate the stretched polyvinyl alcohol-based
More specifically, the
The base film 10 may be made of, for example, polypropylene, polyethylene, polypropylene, or the like, as a resin, such as a thermoplastic polyurethane, a styrene butadiene rubber, or an acrylate rubber, May be a copolymerized resin. On the other hand, the shape of the copolymer resin may be, for example, in the form of an alternating copolymer or a block copolymer, but is not limited thereto.
In addition, the polyolefin-based rubber resin is applied on the base film (10) On May be contained in an amount ranging from 1% by weight to 20% by weight, for example, from 5% by weight to 15% by weight or 8% by weight to 12% by weight. It is possible to have a desired attractive force value between the base film 10 and the polyvinyl alcohol-based film in the above-mentioned content range, so that separation can be easily performed after stretching and stretching.
On the other hand, the polyolefin-based rubber resin on the base film (10) may be in the form of an alternative copolymer. When the polyolefin-based rubber resin is in the form of an alternative copolymer, the attractive force between the base film 10 and the polyvinyl alcohol-based
In addition, the polyolefin-based rubber resin on the base film (10) may be in the form of a block copolymer. When the polyolefin-based rubber resin is in the form of a block copolymer, the attractive force between the base film 10 and the polyvinyl alcohol-based
In an exemplary embodiment, after the step of forming a laminated film, a drying process may be performed. The drying temperature may be a temperature below the melting point and / or the glass transition temperature of the base film (10) and the polyvinyl alcohol-based film (20).
The method may further include a step of depositing the laminated film on at least one of iodine and a dichroic dye. The step of salt-adhering is a step of introducing iodine, dyes, pigments, or a mixture thereof into a polyvinyl alcohol-based film of the laminated film and adsorbing them into the film. The iodine, dye or pigment molecule absorbs light oscillating in the stretching direction of the polarizing film and transmits light oscillating in the vertical direction so as to obtain polarized light having a specific vibration direction.
The step of salt-washing may be carried out by impregnating the laminated film with a solution of iodine or a dichroic substance. For example, the temperature of the iodine solution may be in the range of 20 ° C to 50 ° C, and the duration of the iodine solution may be in the range of 10 to 300 seconds. When an iodine solution is used as the iodine solution, an aqueous solution containing iodine (I 2 ) and iodide ions, for example, potassium iodide (KI) used as a solubilizing agent may be used. In an exemplary embodiment, the concentration of iodine (I 2 ) ranges from 0.01 to 0.5 wt% based on the total weight of the aqueous solution, and the concentration of potassium iodide (KI) ranges from 0.01 to 10 wt% based on the total weight of the aqueous solution have.
In an exemplary embodiment, the salt phase may further comprise a swelling step prior to performing the step. The swelling step softens the molecular chains of the polyvinyl alcohol-based film and relaxes the molecular chains, thereby preventing the dichroic substances from being homogeneously dyed into the polyvinyl alcohol-based
The swelling rate may be from 150% to 250%. In this swelling process, the polyvinyl alcohol-based
In another exemplary embodiment, the bridging step may further comprise a bridging step.
When the molecules of iodine or dichroic substance are dyed in the
On the other hand, in the stretching step, a wet stretching method and / or a dry stretching method common to the art can be used for the
Examples of the dry stretching method include inter-roll stretching method, heating roll stretching method, compression stretching method, tenter stretching method, and the like, and the wet stretching method Non-limiting examples include a tenter stretching method and a roll-to-roll stretching method.
In the case of the above wet stretching method, stretching can be performed in an alcohol, water, or boric acid aqueous solution. For example, a solvent such as methyl alcohol or propyl alcohol may be used, but not limited thereto.
The stretching temperature and time may be appropriately selected depending on the material of the film, the desired elongation, the method of use, and the like. The stretching step may be uniaxial stretching or biaxial stretching. However, in order to manufacture a polarizing film to be adhered to a liquid crystal cell, biaxial stretching can be performed so as to realize a retardation property.
The order of the salt-drawing step and the step of stretching need not always be the same, but the order may be appropriately selected depending on the processing equipment and equipment, and in some cases, the step of stretching may be carried out in the step of salt- Process can be carried out at the same time. When the stretching step is carried out simultaneously with the salt-washing step, the stretching step may be carried out in the iodine solution. On the other hand, if the stretching step proceeds simultaneously with the crosslinking step, the stretching step may be carried out in an aqueous solution of boric acid.
Further, the base film (10) may be removed from the stretched laminated film to obtain a thin film polarizing film.
The step of removing the base film 10 to obtain a thin film polarizing film may be performed by a method of applying a peeling force to the
The method may further include the step of laminating a protective film on at least one side of the thin film polarizing film. That is, a protective film may be laminated on one surface or both surfaces of the thin film polarizing film, whereby a polarizing plate can be formed. As the protective film, various films used in the art as a polarizer protective film or a retardation film can be used without limitation, and examples thereof include cellulose-based materials such as triacetylcellulose, diacetylcellulose, polyethylene terephthalate, polyethylene naphthalate, Polyamide-based, polyolefin-based, polyarylate-based, polyvinyl alcohol-based, polyvinylalcohol-based, polyvinylalcohol-based, polyvinylalcohol-based, A film made of a material selected from the group consisting of polyvinyl chloride, polyvinylidene chloride, acrylic, and mixtures thereof.
The method for bonding the protective film is not particularly limited and may be carried out using an adhesive or a pressure sensitive adhesive widely known in the art. The pressure sensitive adhesive or adhesive may be suitably selected in consideration of the material of the protective film to be used, .
On the other hand, the step of removing the base film to obtain the thin film polarizing film and the step of laminating the protective film may be carried out by appropriately arranging the steps in accordance with the case, and in some cases, proceeding at the same time.
In an exemplary embodiment, after the stretching step, a first protective film is laminated on the opposite side of the base film 10 of the polyvinyl alcohol-based
FIGS. 2 and 3 show a laminated film produced according to the method of manufacturing an optical film according to another embodiment of the present invention and a process of separating the optical film on the laminated film
2 and 3, the base film 10 may include a skin layer 10A, and the skin layer 10A may be formed on the base film 10 in contact with the polyvinyl alcohol-based
More specifically, in order to attach the base film 10 and the polyvinyl alcohol-based
The base film 10 may be a coextruded film including the skin layer 10A. That is, the base film 10 may be a film in which the skin layer 10A and the bare layer 10B are co-extruded. In other words, the skin layer 10A, which is the surface in contact with the polyvinyl alcohol-based
On the other hand, the polyolefin-based rubber resin has already been described above, and a more detailed description thereof will be omitted.
Laminated film
The present invention provides a laminated film produced by the above production method. 1, a laminated film according to an embodiment of the present invention includes a stretched base material film 10, and a thin
On the other hand, the base film 10 and the thin
Referring again to FIG. 2, in the laminated film according to another embodiment, the base film 10 is a coextruded film including a skin layer 10A formed on a surface in contact with the thin film polarizing film, and the polyolefin- May be included on the skin layer 10A.
Optical film
Although not shown separately, the optical film according to one embodiment of the present invention may be manufactured by the above-described manufacturing method and may include a thin film polarizing film having a thickness of 0.5 탆 to 15 탆. When the thickness of the thin film polarizing film is 0.5 m or more, it can be thinned in the process, and when it is 15 m or less, it can be applied to a thin film device or the like.
The optical film may include a first protective film and a second protective film attached to both sides of the thin film polarizing film, wherein a first adhesive layer is formed between the thin film polarizing film and the first protective film, and the thin film polarizing film and the second protective film A second adhesive layer may be formed between the films. Further, at least one of the first adhesive layer and the second adhesive layer may have an orientation property at least partially.
The thin film polarizing film may be a biaxially stretched film. When the biaxially stretched thin film polarizing film is bonded to the liquid crystal cell, the retardation property can be realized.
The optical film may be used as a polarizing plate by itself, but may be used by removing at least one of the first protective film and the second protective film. That is, a pressure sensitive adhesive layer is formed on one side of the thin film polarizing film in a state in which the first protective film has the first adhesive layer interposed therebetween while the second protective film is removed on the other side thereof and is adhered to a device such as a liquid crystal cell of a liquid crystal display Lt; / RTI > In this case, since the second protective film is removed, a thin liquid crystal display device can be manufactured.
Liquid crystal display
Although not shown separately, the liquid crystal display device according to an embodiment of the present invention may include the optical film.
The liquid crystal display device may include a liquid crystal cell and a backlight unit.
The liquid crystal cell typically has two substrates and a liquid crystal layer interposed between the substrates. One of the substrates may be a color filter, an opposing electrode, and an alignment layer, and a liquid crystal driving electrode, a wiring pattern, a thin film transistor, an alignment layer, and the like may be formed on the other substrate.
The operation mode of the liquid crystal cell may be, for example, a twisted nematic mode or an electrically controlled birefringence mode. The birefringence control mode may include a vertical alignment method, an OCB (Optically Compensated) method, and an IPS (In-Plane Switching) method.
The backlight unit may generally include a light source, a light guide plate, a reflective film, and the like. Depending on the configuration of the backlight, it can be arbitrarily divided into a direct-down system, a sidelight system, and a planar light source system.
An optical film may be interposed between the backlight unit and the liquid crystal cell. In this case, the thin film polarizing film of the optical film can transmit only the light that vibrates in a specific direction among the light incident from the light source of the backlight unit.
Further, the optical film may be included at a position opposite to the backlight of the liquid crystal cell. In this case, the liquid crystal display device may be interposed between the other components of the liquid crystal display device, or may be located on the surface of the liquid crystal display device. Further, when two optical films are disposed with the liquid crystal cell therebetween, the transmission axis of the thin film polarizing film of each optical film may be orthogonal or parallel.
Hereinafter, the present invention will be described with reference to concrete experimental data.
Production Example 1
A resin containing 10% by weight of a thermoplastic polyurethane resin as a polyolefin-based rubber resin and 90% by weight of a polyethylene resin as a base film and adhering to a polyvinyl alcohol-based film without a separate adhesive, And stretched 6 times by a wet process at 60 占 폚 to prepare a polarizing element having a thickness of 8 占 퐉.
Production Example 2
A polarizing element was produced in the same manner as in Preparation Example 1, except that a polarizing element having a thickness of 10 탆 was produced.
Production Example 3
A polarizing element was prepared in the same manner as in Preparation Example 1, except that a polarizing element having a thickness of 12 占 퐉 was produced.
Production Example 4
A copolymer containing 10% by weight of a thermoplastic polyurethane resin as a polyolefinic rubber resin and 90% by weight of a polyethylene resin with an alternating copolymer was used as a base film and attached to a polyvinyl alcohol film without a separate adhesive After the dichroic dye dyeing step, the dye was stretched 6 times by a wet process at 60 DEG C to prepare a polarizing element having a thickness of 8 mu m.
Production Example 5
A resin containing 10% by weight of a thermoplastic polyurethane resin as a polyolefin-based rubber resin and 90% by weight of a polyethylene resin was copolymerized with a block copolymer as a base film and attached to a polyvinyl alcohol film without a separate adhesive After the dichroic dye dyeing step, the dye was stretched 6 times by a wet process at 60 DEG C to prepare a polarizing element having a thickness of 8 mu m.
Comparative Preparation Example 1
Unlike Production Example 1, a polyvinyl alcohol-based adhesive (prepared by mixing 5 wt% of PVA powder with 95 wt% of water and further mixing an amine-based crosslinking catalyst) After attaching the base film, the dichroic dye dyeing step was followed by a 6-fold stretching at 60 캜 by a wet process to prepare a polarizing element having a thickness of 8 탆.
Comparative Production Example 2
A polarizing element was prepared in the same manner as in Comparative Preparation Example 1 except that a polarizing element having a thickness of 12 占 퐉 was produced.
Experimental Example 1
In Manufacturing Examples 1 to 5 and Comparative Manufacturing Examples 1 and 2, the attraction values between the base film and the polarizing element were measured during the manufacturing process of the polarizing element, and the transmittance and the polarization degree of the polarizing element were measured.
The attraction value (g f / 25 mm) was measured using a Bluehill TA UTM (universal testing machine), and the measurement was performed by measuring a base film and a polyvinyl alcohol resin film sample laminated at a pressure of 0.5 MPa in a width of 25 mm After peeling off, it was peeled off at a peeling angle of 180 ° at a rate of 100 mm / min. Five specimens were measured and the average value was shown.
The transmittance (%) and the degree of polarization (%) were measured using a measuring instrument JASCO V-7100.
Table 1 below shows the results of the above experimental example
It will be appreciated that the embodiments described above are all exemplary and that different embodiments may be applied in combination.
10: substrate film
10A: Skin layer
10B:
20: polyvinyl alcohol film
Claims (15)
And stretching the laminated film,
Wherein the base film comprises a polyolefin-based rubber resin.
Wherein the polyolefin-based rubber resin comprises at least one of a thermoplastic polyurethane, a styrene butadiene rubber, and an acrylate rubber.
Wherein the base film and the polyvinyl alcohol-based film are adhered via an attractive force.
Wherein the attractive force ranges from 80 gf / 25 mm to 250 gf / 25 mm.
Wherein the base film comprises a skin layer formed on a surface in contact with the polyvinyl alcohol film,
Wherein the polyolefin rubber resin is contained in the skin layer.
Wherein the base film is a coextrusion film containing the skin layer.
The polyolefin-based rubber resin is a polyolefin- By weight, and 1% by weight to 20% by weight.
On the base film, the polyolefin-based rubber resin is in the form of an alternative copolymer,
The method of the base film and the polyvinyl alcohol film is the optical film is attached to the force parameters, the force is in the range of 200 g f / 25mm to 250 g f / 25mm.
On the base film, the polyolefin-based rubber resin is in the form of a block copolymer,
The base film and the polyvinyl alcohol-based film and is attached to the force as a medium, the force is 80 g f / 25mm to 150 g f / The method of producing the optical film of the range of 25mm.
Further comprising the step of dipping the laminated film into at least one of iodine and a dichroic dye.
And removing the base film from the stretched laminated film to obtain a thin film polarizing film.
A thin film polarizing film stretched on at least one side of the base film and attached via a pulling force,
Wherein the base film comprises a polyolefin-based rubber resin.
Wherein the base film and the thin film polarizing film are attached via a force.
Wherein the base film is a coextrusion film comprising a skin layer formed on a surface in contact with the thin film polarizing film,
Wherein the polyolefin-based rubber resin is contained on the skin layer.
A thin film polarizing film having a thickness of 0.5 占 퐉 to 15 占 퐉.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140131397A KR20160038382A (en) | 2014-09-30 | 2014-09-30 | Optical film and method for preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020140131397A KR20160038382A (en) | 2014-09-30 | 2014-09-30 | Optical film and method for preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160038382A true KR20160038382A (en) | 2016-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| KR1020140131397A KR20160038382A (en) | 2014-09-30 | 2014-09-30 | Optical film and method for preparing the same |
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| KR (1) | KR20160038382A (en) |
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2014
- 2014-09-30 KR KR1020140131397A patent/KR20160038382A/en not_active Application Discontinuation
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|---|---|---|---|
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E601 | Decision to refuse application |