KR101930549B1 - Manufacturing method of multilayer reflective polizer and device thereof - Google Patents

Abstract

The manufacturing method of the present invention can produce a multi-layer composite flow using a slit-type extrusion nozzle without using a conventional feed block and a dispenser, so that the manufacturing cost and the defect rate can be remarkably reduced.
Also, since the skin layer is formed on at least one surface of the core layer in a molten state, the skin layer is not subjected to a separate adhesion step. This makes it possible to remarkably reduce the manufacturing cost and to maximize optical properties at a limited thickness.

Description

[0001] The present invention relates to a multilayer reflective polarizer,

The present invention relates to a method and an apparatus for manufacturing a multilayer reflective polarizer, and more particularly, to a method and apparatus for manufacturing a multilayer reflective polarizer capable of remarkably reducing manufacturing cost and defect rate while integrally forming a core layer and a skin layer .

Flat panel display technology is mainly composed of liquid crystal display (LCD), projection display, and plasma display (PDP), which have already secured a market in the TV field. In addition, field emission display (FED) and electroluminescence display (ELD) And it is expected to occupy the field according to each characteristic. Liquid crystal displays are currently being used in a wide range of applications such as notebook computers, personal computer monitors, liquid crystal TVs, automobiles, and aircrafts, accounting for 80% of the flat panel market, and booming demand for LCDs worldwide.

Conventional liquid crystal displays place a liquid crystal and an electrode matrix between a pair of light absorbing optical films. In liquid crystal displays, the liquid crystal portion has an optical state that changes accordingly by moving the liquid crystal portion by an electric field generated by applying a voltage to the two electrodes. This process displays an image by using a polarized light in a specific direction as a 'pixel' containing information. For this reason, liquid crystal displays include a front optical film and a rear optical film that induce polarization.

  The optical film used in such a liquid crystal display does not necessarily have a high utilization efficiency of light emitted from the backlight. This is because 50% or more of the light emitted from the backlight is absorbed by the back side optical film (absorption type polarizing film). Therefore, in order to improve the utilization efficiency of the backlight in the liquid crystal display, a reflection type polarizer is provided between the optical cavity and the liquid crystal assembly.

  1 is a view showing the optical principle of a conventional reflective polarizer. Specifically, the P polarized light from the optical cavity toward the liquid crystal assembly passes through the reflective polarizer and is transmitted to the liquid crystal assembly. The S polarized light is reflected from the reflective polarizer into the optical cavity, Is transmitted to the reflection type polarizer, and finally S-polarized light is converted into P-polarized light that can pass through the polarizer of the liquid crystal assembly, passes through the reflection type polarizer, and is transmitted to the liquid crystal assembly.

The selective reflection of the S polarized light and the transmission of the P polarized light with respect to the incident light of the reflective polarizer are performed in such a manner that the refractive index of each optical layer in the state of alternately stacking the flat optical layer having the anisotropic refractive index and the flat optical layer having the isotropic refractive index The optical thickness of each of the optical layers in accordance with the difference and the elongation process of the laminated optical layer, and the change of the refractive index of the optical layer. That is, the light incident on the reflective polarizer repeats the reflection of the S polarized light and the transmission of the P polarized light while passing through each optical layer, and finally, only the P polarized light of the incident polarized light is transmitted to the liquid crystal assembly. On the other hand, as described above, the reflected S polarized light is reflected in the polarization state of the diffused reflection plane of the optical cavity in a randomized state and then transmitted to the reflective polarizer. As a result, it is possible to reduce the waste of power with loss of light generated from the light source.

However, such a conventional reflective polarizer has a structure in which an isotropic optical layer and an anisotropic optical layer having different refractive indexes are alternately stacked and subjected to an elongation treatment, whereby the optical thickness and refractive index of each optical layer, which can be optimized for selective reflection and transmission of incident polarized light, The manufacturing process of the reflection type polarizer is complicated. In particular, since each optical layer of the reflective polarizer has a flat plate structure, the P polarized light and the S polarized light must be separated in accordance with a wide incident angle range of incident polarized light, so that the number of layers of the optical layer is excessively increased and the production cost exponentially There was an increasing problem. Further, there is a problem that optical performance is deteriorated due to optical loss due to the structure in which the number of layers of the optical layer is excessively formed. When the skin layer of the conventional polycarbonate material is integrated with the core layer alternately laminated with PEN-coPEN, peeling may occur due to the compatibility member, and the degree of crystallization is about 15% There is a high risk of occurrence of birefringence on the axis. Accordingly, in order to apply the polycarbonate sheet of the non-smelting process, an adhesive layer has to be formed between the core layer and the skin layer. As a result, the yield decreases due to external foreign matters and process defects due to the addition of the adhesive layer process. Generally, in producing a polycarbonate-free sheet of the skin layer, birefringence occurs due to uneven shear pressure due to the winding process, It is necessary to control the molecular structure of the polymer and speed control of the extrusion line in order to compensate for the deterioration of productivity. In addition, when a multilayer polarizer is manufactured through a feed block and a distributor, it is difficult to control various thicknesses as well as yellowing and carbonization due to an increase in polymer retention time. Therefore, in order to control the visible light region of the wavelength of 380 nm to 780 nm, the reflection polarizing layer having two or more different thicknesses must be extruded and manufactured through the bonding process, since the reflective polarizing function is implemented for one visible light wavelength region Resulting in a defect rate occurrence and a running cost for each process.

Thus, a technical idea has been proposed in which the birefringent polymer stretched in the longitudinal direction in the substrate is arranged to achieve the function of the reflection type polarizer. 2 is a perspective view of a reflective polarizer 20 including a bar-shaped polymer, in which birefringent polymers 22 stretched in the longitudinal direction are arranged in one direction inside the base material 21. Fig. The birefringent interface between the base material 21 and the birefringent polymer 22 causes a light modulation effect to perform the function of the reflection type polarizer. However, there is a problem that the light modulation efficiency is too low as compared with the above-mentioned alternately stacked reflective polarizers. To have a transmittance and a reflectance similar to those of the alternately stacked reflective polarizers, an excessively large number of birefringent polymers 22 There was a problem to be placed. Specifically, in order to have optical properties similar to those of the above-described laminate-type reflective polarizer in the substrate 21 having a width of 1580 mm and a height (thickness) of 400 μm or less when a horizontal 32-inch display panel is manufactured on the basis of the vertical cross section of the reflective polarizer, At least 100% of circular or elliptical birefringent polymer 22 having a cross-sectional diameter in the longitudinal direction of 0.1 to 0.3 탆 must be contained. In this case, not only the production cost is excessively increased but also the facilities are excessively complicated, There is a problem in that it is difficult to produce a spinneret and commercialization is impossible.

In order to overcome this problem, a technical idea including a birefringent sea chart was proposed in the substrate. 3 is a cross-sectional view of a birefringent chart paper included in the inside of the base material. Since the birefringent chart paper can generate a light modulation effect at the light modulation interface of the internal part and the dissolution part, The optical properties can be achieved without arranging chart marks. However, since the fiber is a birefringent graphite sheet, compatibility with a base material such as a polymer, ease of handling, and adhesiveness have been encountered. Furthermore, the light-scattering is induced by the circular shape, and the reflection polarizing efficiency against the light wavelength in the visible light region is lowered. As a result, the polarizing characteristic is lowered compared with the existing product and the luminance improvement is limited. In addition, As a result, the optical characteristics were deteriorated due to light leakage due to pore generation. In addition, due to the structure of the fabric, there is a problem in that reflection and polarization characteristics are limited due to the limitation of the layer structure.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and a first object of the present invention is to provide a method of manufacturing a multilayer reflective polarizer and a manufacturing apparatus thereof, which can significantly reduce manufacturing cost and defect ratio as compared with a conventional multilayer reflective polarizer will be.

A second object of the present invention is to provide a method and apparatus for manufacturing a multilayer reflective polarizer integrally formed without an adhesive layer between a core layer and a skin layer.

In order to achieve the above object, the present invention provides a method of manufacturing a multilayer reflective polarizer comprising a core layer in which a first component and a second component are alternately laminated, and a skin layer formed on at least one surface of the core layer, (1) supplying a first component, a second component and a skin layer component to the extruding portions, respectively; (2) the repeating units of the first component and the second component form alternately stacked multi-layer composite streams, the multi-layer composite stream reflecting the transverse waves of the desired wavelength (S wave) and forming the average optical thickness of the repeating units differently A first component and a second component transferred from the extruding unit are introduced into a single seawater type extrusion orifice including a separating plate having a part or all of the diameter of the slits between the repeating units to form a multilayer composite flow, Interposing at least one side of the composite stream with the skin layer component transferred from the extrusion portion; And (3) inducing spreading of the multi-layer composite stream in which the skin layer is laminated in the flow control section.

According to a preferred embodiment of the present invention, the detachable distribution plate may form a plurality of groups having the same diameter of the slits in order to form groups having the same optical thickness between the repeating units.

According to a preferred embodiment of the present invention, the detention distribution plate may form two or more, preferably four, groups.

According to a preferred embodiment of the present invention, the diameters of the inter-group slits may be different in order to set different average optical thicknesses among the plurality of groups.

According to a preferred embodiment of the present invention, the diameters of the slits forming the one repeating unit may be different.

According to another preferred embodiment of the present invention, the first component is at least one selected from the group consisting of polyethylene naphthalate (PEN), co-polyethylene naphthalate (co-PEN), polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PS), heat resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile (SAN), ethylene vinyl acetate (EVA), polyamide (PA) , Phenol, epoxy (EP), urea (UF), melamine (MF), unsaturated polyester (UP), silicone (SI) and cycloolefin polymers.

According to another preferred embodiment of the present invention, the second component is selected from the group consisting of polyethylene naphthalate (PEN), copolyethylene naphthalate (co-PEN), polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PS), heat resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile (SAN), ethylene vinyl acetate (EVA), polyamide (PA) (EP), urea (UF), melamine (MF), unsaturated polyesters (UP), silicon (SI) and cyclic olefin polymers may be used alone or in combination. More preferably, co- .

According to another preferred embodiment of the present invention, between the steps (1) and (2), the first component transferred from the extruder is discharged through the first pressurizing means into a different seawater extrusion orifice Step < / RTI >

According to another preferred embodiment of the present invention, the second component transferred from the extrusion part between the step (1) and step (2) further includes a step of discharging the second component into the seawater extrusion / can do.

According to another preferred embodiment of the present invention, the seawater extrusion orifice has a number of slit layers of preferably 200 or more, more preferably 300 or more, more preferably 400 or more, more preferably 600 More preferably 800 or more, and most preferably 1200 or more.

According to another preferred embodiment of the present invention, the flow control unit may be a T-die or a coat-hanger die.

According to another preferred embodiment of the present invention, the method may further include the step of stretching the multilayer reflective polarizer.

According to another preferred embodiment of the present invention, the apparatus for producing a multilayer polarizer of the present invention comprises a multilayer reflective polarizer including a core layer in which a first component and a second component are alternately stacked, and a skin layer formed on at least one surface of the core layer, Wherein at least three extruding portions into which the first component, the second component and the skin layer component are separately introduced; The repeating units of the first component and the second component form alternately stacked multi-layer composite streams, and the multi-layer composite stream is formed by reflecting the transverse waves (S waves) of a desired wavelength and forming the average optical thicknesses of the repeating units differently. A single seawater extrusion orifice including a separating plate having a part or all of a diameter different from a diameter of a slit between repeating units forming a multi-layer composite stream by feeding the first component and the second component transferred from the extruding section, A spin block part communicating with an extruded part into which a layer component is injected and having a skin layer laminated on at least one surface of the multilayer composite stream; And a flow control unit for guiding the spread of the multi-layer composite stream in which the skin layer transferred from the spin block unit is laminated.

According to a preferred embodiment of the present invention, the detachable distribution plate may form a plurality of groups having the same diameter of the slits in order to form groups having the same optical thickness between the repeating units.

According to a preferred embodiment of the present invention, the detention distribution plate may form two or more, preferably four, groups.

According to a preferred embodiment of the present invention, the diameters of the inter-group slits may be different in order to set different average optical thicknesses among the plurality of groups.

According to a preferred embodiment of the present invention, the diameters of the slits forming the one repeating unit may be different.

 According to another preferred embodiment of the present invention, the spin block unit may include first pressing means for discharging the first component transferred from the extrusion unit and supplying the discharged first component to the male-like extrusion orifice.

According to another preferred embodiment of the present invention, the spin block unit may include a second pressing unit that discharges the first component transferred from the extrusion unit and supplies the discharged first component to the sea-island extrusion orifice.

According to another preferred embodiment of the present invention, the number of the slits (number of layers) is preferably 200 or more, more preferably 300 or more, still more preferably 400 or more Preferably at least 600, more preferably at least 800, and most preferably at least 1200.

According to another preferred embodiment of the present invention, the flow control unit may be a T-die or a coat-hanger die.

Hereinafter, terms used in this specification will be briefly described.

'Polymer has birefringence' means that when a light is irradiated to a polymer having a different refractive index along the direction, the light incident on the polymer is refracted by two light beams having different directions.

'Light modulation' means that the irradiated light reflects, refracts, scatters, changes the intensity of the light, the period of the wave or the nature of the light.

The manufacturing method of the present invention can produce a multi-layer composite flow using a sea-island extrusion-port without using a conventional feed block and a distributor, so that the manufacturing cost and the defect rate can be remarkably reduced.

Also, since the skin layer is formed on at least one surface of the core layer in a molten state, the skin layer is not subjected to a separate adhesion step. This makes it possible to remarkably reduce the manufacturing cost and to maximize optical properties at a limited thickness.

1 is a schematic view for explaining the principle of a conventional reflective polarizer.
2 is a perspective view of a reflection type polarizer including a bar-shaped polymer.
3 is a cross-sectional view showing a path of light incident on a birefringent graphite sheet used for a reflective polarizer.
Fig. 4 is a perspective view of a cowling distribution plate of a sea-level push-out detachment which can be used in the present invention, Fig. 5 is a bottom view thereof, and Fig.
7 is a cross-sectional view of a multi-layer composite flow according to a preferred embodiment of the present invention.
Figure 8 is a schematic diagram comprising first pressing means according to a preferred embodiment of the present invention.
9 is a schematic diagram including a second pressing means according to a preferred embodiment of the present invention.
Figure 10 is a cross-sectional view of a coat-hanger die in accordance with a preferred embodiment of the present invention, and Figure 11 is a side view.
12 is a cross-sectional view of a multilayer reflective polarizer according to a preferred embodiment of the present invention.
13 is a cross-sectional view of a multilayer reflective polarizer according to another embodiment of the present invention.
14 is a schematic view of an apparatus for producing a multilayer reflective polarizer according to a preferred embodiment of the present invention.
15 is a schematic view of an apparatus for manufacturing a multilayer reflective polarizer according to another preferred embodiment of the present invention.
16 is an exploded perspective view of a liquid crystal display device including the reflective polarizer of the present invention.

Hereinafter, the present invention will be described in more detail.

As described above, when the conventional feed block and distributor are manufactured, there is a problem in that the thickness of the polymer can not be controled as well as the occurrence of yellowing and carbonization due to an increase in the residence time of the polymer. Therefore, in order to control the visible light region of the wavelength of 380 nm to 780 nm, the reflection polarizing layer having two or more different thicknesses must be extruded and manufactured through the bonding process, since the reflective polarizing function is implemented for one visible light wavelength region Resulting in a defect rate occurrence and a running cost for each process.

In addition, since the adhesive layer must be formed between the skin layer and the core layer, the defect rate is increased and the thickness of the core layer is reduced due to the presence of the adhesive layer in a limited space.

According to a preferred embodiment of the present invention, there is provided a method of manufacturing a multilayer reflective polarizer including a core layer in which a first component and a second component are alternately stacked and a skin layer formed on at least one surface of the core layer, (2) repeating units of the first component and the second component form alternately laminated multi-layer composite streams, wherein the multi-layer composite stream is a mixture of the first component, the second component and the skin layer component, In order to reflect a transverse wave (S wave) of a wavelength and to form an average optical thickness of the repeating units differently, a single-seated type extrusion nozzle having a detaching distribution plate in which the diameter of the slit between the repeating units is partly or entirely different, Layer composite stream and joining at least one side of the multi-layer composite stream with the skin layer component transferred from the extrusion section; And (3) inducing spreading of the multi-layer composite stream in which the skin layer is laminated in the flow control section, thereby solving the above-mentioned problem. Accordingly, the production cost and the defect rate can be remarkably reduced because a multilayer composite flow is produced by using a sea-island extrusion-port without using a conventional feed block and a distributor. Also, since the skin layer is formed on at least one surface of the core layer in a molten state, the skin layer is not subjected to a separate adhesion step. This makes it possible to remarkably reduce the manufacturing cost and to maximize optical properties at a limited thickness.

First, in step (1), the first component, the second component, and the skin layer component are supplied to the extruding portions, respectively. The first component is a polymer dispersed in the second component forming the base material, and may be used without limitation as long as it is used in a reflective polarizer in which a conventional polymer is dispersed. Preferably, the first component is polyethylene naphthalate (PEN), copolyethylene Polymers such as phthalates (co-PEN), polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PC) alloys, polystyrene (PS), heat resistant polystyrene (PS), polymethylmethacrylate (PB), polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (SAN), ethylene vinyl acetate (EVA), polyamide (PA), polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyesters (SI) and cycloolefin polymers Number and may be more preferably PEN.

The second component forms a substrate and can be used without limitation as long as it is used as a material of a substrate in a reflective polarizer in which a polymer is dispersed. Preferably, the second component is selected from the group consisting of polyethylene naphthalate (PEN), co-polyethylene naphthalate ), Polyethylene terephthalate (PET), polycarbonate (PC), polycarbonate (PC) alloy, polystyrene (PS), heat resistant polystyrene (PS), polymethylmethacrylate (PMMA), polybutylene terephthalate ), Polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polyurethane (PU), polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile (EVA), polyamide (PA), polyacetal (POM), phenol, epoxy (EP), urea (UF), melanin (MF), unsaturated polyester (UP) The olefin polymer may be used singly or in combination Can be used and may be more preferably, dimethyl 2,6-naphthalenedicarboxylate, dimethyl terephthalate and ethylene glycol, Im chroman-hexane dimethanol (CHDM), such as the monomers are suitably polymerized co-PEN.

The skin layer component can be used without limitation as long as it is usually used in a reflective polarizer in which a polymer is dispersed. Preferably, the skin layer component may be a polyethylene terephthalate (PET), a polycarbonate (PC), a polycarbonate (PC) ), Heat resistant polystyrene (PS), polymethyl methacrylate (PMMA), polybutylene terephthalate (PBT), polypropylene (PP), polyethylene (PE), acrylonitrile butadiene styrene (ABS), polyurethane ), Polyimide (PI), polyvinyl chloride (PVC), styrene acrylonitrile blend (SAN), ethylene vinyl acetate (EVA), polyamide (PA), polyacetal (POM) (UF), melamine (MF), unsaturated polyesters (UP), silicon (SI) and cycloolefin polymers. The polycarbonate alloy is preferably made of a polycarbonate and a modified glycol polycyclohexylene dimethylene terephthalate (PCTG), more preferably a polycarbonate and a modified glycol polycyclohexane (PCTG) may be a polycarbonate alloy having a weight ratio of 15:85 to 85:15. In the meantime, the skin layer of the present invention is preferably made of a material having a small change in refractive index in the spreading and stretching process, more preferably polycarbonate or polycarbonate glass.

Meanwhile, the first component, the second component, and the skin layer component may be separately supplied to the independent extrusion units. In this case, the extrusion unit may be composed of three or more. It is also included in the present invention to feed one extruded portion including a separate supply path and a distribution port so that the polymers do not mix. The extruder may be an extruder, which may further include a heating means or the like to convert the supplied polymers in the solid phase into a liquid phase.

Next, in step (2), the repeating units of the first component and the second component form alternately multi-layered composite streams, and the multi-layer composite stream reflects the transverse waves of the desired wavelength (S waves) To form differently, the first component and the second component transferred from the extruding section are introduced into a single-seated-type extrusion nozzle containing a separating plate having a part or all of the diameter of the slit being different from each other, .

4 to 6 are a perspective view, a bottom view, and a coupling view of a cowling distribution plate of a sea type extrusion orifice that can be used in the present invention. This is a perspective view showing the combined structure of the detention plates of the sea-island extrusion detention. The first pickling distribution plate S1 located at the upper end of the sea-island extrusion port can be constituted by the first component supply path 50 and the second component supply path 51 therein. So that the first component transferred through the extrusion portion can be supplied to the first component supply path 50 and the second component can be supplied to the second supply path 51. A plurality of such supply paths may be formed as the case may be. Polymers that have passed through the first receiving distribution plate S1 are transported to the second receiving distribution plate S2 located below. The first component injected through the first component supply path 50 is branched and transferred to the plurality of first component supply paths 52 and 53 along the flow path. In addition, the second component injected through the second component supply path (51) is branched and transferred to the plurality of second component supply paths (54, 55, 56) along the flow path. The polymers passing through the second separating distribution plate S2 are transported to the third separating distribution plate S3 located below.

The first component supplied through the first component supply paths 52 and 53 is connected to the first component supply paths 60, 61, 62, 63, 67, 68, 69, 70 along the flow path. Similarly, the second components injected through the second component supply paths 54, 55 and 56 are respectively connected to the second component supply paths 57, 58, 59, 64, 65, 66 , 71, 72 and 73 along the flow path. The first component introduced through the first component supply passages 60 and 67 of the first component supply passages formed in the third pickling distribution plate S3 is supplied to the first component supply passages 60 and 67, To the first flow path 74 of the first flow path 74. Likewise, the first component injected through the second component supply paths 57, 64 and 71 of the second component supply paths formed in the third pickling distribution plate S3 flows through the second component supply path 57, To the second one of the first and second flow paths (75). In this way, the first component transferred through the first component supply paths of the third holding distribution plate S3 is distributed to the odd-numbered flow paths 74, 76, 78, 80 of the fourth holding distribution board S4 And the second component transferred through the second component supply paths of the third component distribution plate S3 is transferred to the even flow channels 75, 77, 79 of the fourth component distribution plate S4. Whereby the first component and the second component can be alternately stacked. According to the above-described principle, the lower portion of the fourth housing distribution plate S4 may further include a separation plate (not shown) perpendicular to the flow direction of the fourth housing distribution plate and having a larger number of flow channels, It is obvious to those skilled in the art to extend the number of channels by the number. On the other hand, the first component transferred through the odd-numbered flow paths 74, 76, 78, 80 of the fourth bundled distribution plate S4 is divided into the odd-numbered flow paths 81, And the second component transferred through the even-numbered flow paths 75, 77 and 79 of the fourth holding distribution plate S4 is transferred to the fifth holding distribution plate 82, 84, 86, 88, 90, 91, 92 of the first to fifth flow paths S5, S5. Fig. 5 is a bottom view of the sea-island push-out apparatus shown in Fig. 4, and the discharge path of the fifth pick-and-place distribution board S5 is formed integrally with a slit type not separated by a hole type. Whereby the first component and the second component form respective layers. Therefore, the number of layers of the multilayer composite stream can be determined according to the number of slits in the fifth holding distribution board S5. Preferably, the number of layers is 100 or more, more preferably 150 or more, more preferably 200 or more, still more preferably 300 or more, still more preferably 400 or more, still more preferably 600 or more Preferably 800 or more, and most preferably 1200 or more. Thereafter, the multilayer composite flow is discharged through the discharge port 94 of the sixth holding distribution plate. Fig. 7 is a cross-sectional view of a multi-layer composite current flow in which the first component 100,102 and the second component 101,103 are alternately laminated. In this case, one of the first component 100 and the deposited second component 101 can be defined as a repeating unit, and one compound stream includes a plurality of repeating units.

 4 to 6 are illustrations of a detachable distribution plate that can be used in a sea level extrusion or detaching apparatus in which the present invention can be used. In order to produce a multi-layered composite in which first and second components are alternately stacked, It is obvious that a person skilled in the art will appropriately design and use the number, structure, size and shape of the holding hole, the slit size of the fifth holding distribution plate, and the size of the discharge port. On the other hand, the diameter of the slits in the bottom view of the fifth housing distribution plate may be 0.17 to 0.6 mm, and the diameter of the discharge port may be 5 to 50 mm, but the present invention is not limited thereto. The diameter of the slit and the like are well known to those skilled in the art.

On the other hand, the multi-layer composite stream may be manufactured such that the optical thicknesses of the repeating units are different to cover the entire range of the visible light wavelength region. Specifically, the optical thickness means n (refractive index) × d (physical thickness). Therefore, if the first and second components forming the repeating units included in the multi-layer composite current are the same, the optical thickness will be proportional to the physical thickness d unless there is a difference in refractive index. Therefore, by varying the average value of the physical thickness (d) of the repeating units of the first component and the second component included in the multi-layer composite stream, it is possible to derive the difference in optical thicknesses of the repeating units included in the multi-layer composite stream. For this purpose, the diameter of the slits included in the sea-island extrusion nozzle may be designed differently for each repeating unit, thereby producing a multi-layer composite stream including repeating units having different average optical thicknesses.

On the other hand, the wavelength of light and the optical thickness (nd) are defined by the following relational expression (1).

[Relation 1]

λ = 4nd

Where? Is the wavelength of light (nm), n is the refractive index, d is the physical thickness (nm)

Therefore, when the optical thickness (nd) deviates, it is possible to cover not only the wavelength of the target light but also the wavelength range of the light including the target, thereby greatly improving uniform optical properties. On the other hand, d means the thickness of one layer, and since the repeating unit is composed of two layers of the first component and the second component, if the physical thicknesses of the first component and the second component are the same, Can be defined according to the following relation (2).

[Relation 2]

? = 2 (n ₁ d ₁ + n ₂ d ₂ )

(Nm), n ₁ is refractive index of one layer, n ₂ is refractive index of two layers, d ₁ is physical thickness of one layer (nm), and d ₂ is physical thickness of two layers (nm).

 Accordingly, the multi-layered composite according to the present invention can cover the entire visible light region by setting the average optical thicknesses of the repeating units constituting the complex current to be different from each other, and can reflect S waves in a wide wavelength range. Further, the repeating units having different optical thicknesses can be gathered together with the repeating units having the similar optical thickness to form several groups depending on the optical thickness, or the repeating units having the optical thickness difference can be randomly formed. Further, the thickness of the slit forming one repeating unit may be different. Furthermore, the thickness of the slit can be set so that repeating units having the same optical thickness form a group. In this case, the number of groups may be three or four or more.

According to another preferred embodiment of the present invention, the first component transferred from the extruding unit between the step (1) and the step (2) is discharged through the first pressing unit to the seawater extrusion / can do. Specifically, FIG. 8 is a schematic view including a first pressing means, in which a first component transferred from an extrusion portion (not shown) is supplied to the first pressing means 130, Can be supplied to the extrusion opening 132. For this, the discharge amount of the first pressurizing unit 130 may be 1 to 100 kg / hr, but is not limited thereto.

And the second component transferred from the extruding unit may be discharged through the second pressing unit to the seawater extrusion orifice. Specifically, FIG. 9 is a schematic view including a second pressing means, in which a second component transferred from an extruding portion (not shown) is supplied to the second pressing means 140, And can be supplied to the extrusion opening 142. For this, the discharge amount of the second pressurizing unit 130 may be 1 to 100 kg / hr, but is not limited thereto.

Thereafter, the skin layer component transferred from the extrusion portion is joined to at least one surface of the formed single multi-layer composite flow. Preferably, the skin layer component may be laminated on both sides of the core layer.

Next, in step (3), the core layer is caused to spread in the flow control section. Specifically, Figure 10 is a cross-sectional view of a coat-hanger die, which is a type of preferred flow control that may be applied to the present invention, and Figure 11 is a side view. The degree of spreading of the core layer can be appropriately adjusted to adjust the repeating unit to have an optical thickness suitable for reflecting light of a desired wavelength. This can be suitably designed in consideration of further reducing the optical thickness in the subsequent stretching process. Specifically, in FIG. 10, since the core layer transferred through the flow path spreads widely from side to side in the coat-hanger die, the first component included therein also spreads to the left and right. Also, as shown in the side view of FIG. 11, the coat hanger die is widely spread to the left and right but has a structure of shrinking up and down so that it purges in the horizontal direction of the core layer and shrinks in the thickness direction. This is based on Pascal's principle, in which the fluid in the enclosure is guided to spread widely in the width direction by the principle that the pressure is transmitted to the fine portion by a certain pressure. Therefore, the outlet size is wider in the width direction than the die inlet size, and the thickness is reduced. This requires the use of the Pascal principle in which the molten liquid material can flow and shape controlled by pressure in a closed system, preferably a polymer flow rate and viscosity induction such that a flow of laminar flow of less than 2,500 Reynolds numbers is preferred. When the flow of the turbulent flow is 2,500 or more, the induction of the multilayer is uneven, and there is a possibility that the optical characteristic is varied. The left and right die width of the outlet of the coat-hanger die may be between 800 and 2,500 mm and the fluid flow of the polymer is required to regulate the pressure so that the Reynolds number does not exceed 2,500. The reason is that the polymer flow becomes turbulent and the arrangement of the cores may be disturbed. Also, the internal temperature may be 265 to 310 ° C.

The flow control unit may be a T-die or a manifold type Coat-hanger die capable of inducing the spread of the repeating unit, but is not limited thereto, and may be used without limitation as long as it can induce spreading of the core layer.

According to a preferred embodiment of the present invention, after the step (3), (4) cooling and smoothing the spreader-guided polarizer transferred from the flow controller, (5) stretching the polarizer through the smoothing step ; And (6) opening and fixing the stretched polarizer.

First, as a step of cooling and smoothing the polarizer transferred from the flow control unit as the step (4), it is possible to cool it, solidify it, and then perform a smoothing step through a casting roll process or the like.

Thereafter, a step of stretching the polarizer through the smoothing step is performed. The stretching may be performed through a conventional stretching process of a reflective polarizer, thereby causing a refractive index difference between the first component and the second component to cause a light modulation phenomenon at the interface, and the stretch- The optical thickness corresponding to the desired wavelength range is finally obtained. Therefore, in order to adjust the optical thickness of the repeating unit in the final reflective polarizer, it can be appropriately set in consideration of the slit diameter, the spreading inducing condition, and the stretching ratio of the seawater extrusion / For this purpose, the uniaxial stretching or biaxial stretching can be preferably performed in the stretching step, and more preferably uniaxial stretching can be performed. In the case of uniaxial stretching, stretching can be performed in the longitudinal direction. The stretching ratio may be 3 to 12 times. On the other hand, a method of changing an isotropic material to birefringent is commonly known. For example, when stretching under appropriate temperature conditions, polymer molecules may be oriented so that the material becomes birefringent.

Next, in step (6), the final reflective polarizer can be manufactured through a step of fixing the stretched polarizer. The hot fix may be heat-set through a conventional method, preferably at 180 to 200 ° C for 0.1 to 3 minutes through an IR heater, a ceramic heater, a hot air heater, or the like.

On the other hand, in the present invention, when the average optical thickness of the target repeating unit between groups is determined, the reflection type polarizer of the present invention can be manufactured by properly controlling the slit size, the size of the flow control unit, and the stretching ratio .

The multi-layer reflective polarizer of the present invention produced by the above-described method has a first layer and a first layer having in-plane birefringence and a second layer alternately stacked with the first layer, in order to transmit the externally irradiated first polarized light and reflect the second polarized light. Wherein the first and second layers are different in refractive index in at least one axial direction and the first and second layers are elongated in at least one axial direction and the first and second layers Comprises a core layer containing one repeating unit and a skin layer integrally formed on at least one side of the core layer.

12 is a cross-sectional view of a multilayer reflective polarizer according to a preferred embodiment of the present invention. Specifically, the skin layers 185 and 186 are integrally formed on both sides of the core layer 180. The core layer 180 includes a plurality of repeating units R1 and R2. The first layers 181 and 183 corresponding to the first component and the second layers 182 and 184 corresponding to the second component are alternately stacked. The first layer 181 and the second layer 182 are defined as a first repeating unit R1 and the other first layer 183 and the second layer 184 form a second repeating unit R2. The core layer of the present invention may preferably contain at least 200 repeating units, more preferably at least 400 repeating units, and most preferably at least 600 repeating units.

Further, the core layer and the skin layer are integrally formed without including an adhesive layer. As a result, deterioration of optical properties due to the adhesive layer can be prevented, and more layers can be added to a limited thickness, so that optical properties can be remarkably improved. Further, since the skin layer is produced simultaneously with the core layer and then the stretching process is performed, unlike the conventional adhesion of the core layer after stretching to the unstretched skin layer, the skin layer of the present invention can be stretched in at least one axial direction. As a result, the surface hardness is improved as compared with the non-drawn skin layer, and the scratch resistance is improved and the heat resistance can be improved.

13 is a cross-sectional view of a multilayer reflective polarizer according to a preferred embodiment of the present invention. 12, the optical thicknesses of the repeating units R1 and R2 are different from each other, and this can be achieved by setting the diameter of the slits included in the islanding distribution plate of the sea-island type extraction and sorting plate to be different from each other . This can cover the entire area of visible light and reflect S waves over a wide wavelength range. Furthermore, repeating units having similar optical thicknesses can be grouped together to form several groups having different average optical thicknesses or repeating units having different optical thicknesses can be randomly arranged.

According to a preferred embodiment of the present invention, a birefringent interface may be formed between the first layer and the second layer forming the core layer. Specifically, in the multilayer reflective polarizer in which the first layer and the second layer are alternately laminated, the substantial coincidence or incoincidence of the refractive index along the X, Y and Z axes in the space between the first and second layers is determined by the axis Which affects the degree of scattering of the polarized light beam. Generally, the scattering ability changes in proportion to the square of the refractive index mismatch. Thus, the greater the degree of discrepancy in refractive index along a particular axis, the more scattered light rays are polarized along that axis. Conversely, when the inconsistency along a particular axis is small, the polarized light rays along the axis are scattered to a lesser degree. If the refractive index of the second layer substantially coincides with the refractive index of the first layer along an axis, incident light polarized with an electric field parallel to this axis is not scattered regardless of the size, shape and density of the portion of the first layer Will pass through the first layer. Also, when the refractive index along the axis is substantially coincident, the light rays pass through the object without being substantially scattered. More specifically, the first polarized light (P wave) is transmitted without being influenced by the birefringent interface formed at the boundary between the second layer and the first layer, while the second polarized light (S wave) The light is affected by the birefringent interface formed at the boundary. As a result, the P wave is transmitted and the S wave is modulated by light such as scattering and reflection of light, resulting in separation of polarized light.

Therefore, the first layer and the second layer may form a birefringence interface at the cemented surface to cause a light modulation effect. Therefore, when the second layer is optically isotropic, the first layer may have birefringence. Specifically, when the refractive index in the x-axis direction is nX1, the refractive index in the y-axis direction is nY1, the refractive index in the z-axis direction is nZ1, and the refractive indexes of the second layer are nX2, nY2 and nZ2, Plane birefringence may occur. More preferably, the first layer and the second layer may differ in at least one of X, Y, and Z-axis refractive indexes, and more preferably, when the extension axis is the X-axis, Is 0.05 or less, and the difference in refractive index with respect to the X-axis can be 0.1 or more. On the other hand, when the difference in the refractive index is 0.05 or less, it is interpreted as matching.

Meanwhile, according to a preferred embodiment of the present invention, the total number of layers of the multilayer reflective polarizer may be 100 to 2000. The thickness range of the repeating unit can be appropriately designed according to the wavelength range of the desired light and the refractive index, and may preferably be 65 to 300 nm. The thicknesses of the first layer and the second layer forming the repeating unit may be the same or different. In the present invention, the thickness of the core layer may be 10 to 300 탆.

According to another preferred embodiment of the present invention, a multilayer polarizer manufacturing apparatus of the present invention comprises a core layer in which a first component and a second component are alternately stacked, and a core layer An apparatus for producing a multilayer reflective polarizer including a skin layer formed on at least one surface thereof, the apparatus comprising: at least three extruders into which a first component, a second component, and a skin layer component are separately introduced; The repeating units of the first component and the second component form alternately stacked multi-layer composite streams, and the multi-layer composite stream is formed by reflecting the transverse waves (S waves) of a desired wavelength and forming the average optical thicknesses of the repeating units differently. A single seawater extrusion orifice including a separating plate having a part or all of a diameter different from a diameter of a slit between repeating units forming a multi-layer composite stream by feeding the first component and the second component transferred from the extruding section, A spin block part communicating with an extruded part into which a layer component is injected and having a skin layer laminated on at least one surface of the multilayer composite stream; And a flow control unit for guiding the spread of the multi-layer composite flow including the skin layer transferred from the collection block unit.

14 is a schematic view of an apparatus for manufacturing a multilayer reflective polarizer in which a core layer is integrally formed according to a preferred embodiment of the present invention. And includes a first extrusion part 220 into which the first component is injected and a second extrusion part 221 into which the second component is injected. The first extruding part 220 is connected to a spin block part C including a single sea type extrusion opening 223. At this time, the first extruding unit 220 supplies the first component to the seawater extrusion orifice 223 in a molten state. The second extruding part 221 is also connected to the spin block part C and supplies the second component to the sea type extrusion orifice 223 contained therein in a molten state. On the other hand, in order to form the optical thicknesses of the repeating units included in the multi-layer composite stream differently, the diameter of the slits 223 may be partially or completely different depending on the repeating unit. Furthermore, the diameter of the slit can be adjusted so that the repeating units having similar optical thicknesses can be grouped together to form several groups having different average optical thicknesses, or the repeating units having different optical thicknesses can be randomly arranged. The skin layer component transferred from the third extrusion part 222 may be interwoven with the multi-layer composite stream manufactured in the spin block part C. To this end, the spin block part C further includes a separate joint part or a multilayer composite flow is generated inside the islands extrusion orifice 223 in which the third extrusion part 222 is communicated with the sea water extrusion orifice 223 The skin layer can be laminated.

The multi-layer composite stream having the skin layer formed through the sea-island extrusion opening 223 is conveyed to the flow control section 229 and the spread of the first component and the second component is induced. Preferably, the flow control may be a T-die or a coat-hanger die.

15 is a schematic view of an apparatus for manufacturing a multilayer reflective polarizer according to another preferred embodiment of the present invention. 14, the first extruding unit 220 feeds the first component to the first pushing unit 230. As shown in FIG. The first pressurizing means (230) discharges the first component into the seawater extrusion orifice (223). The second extruding portion 221 feeds the second component to the second pressing means 231. The second pressing means 231 discharges the second component to the hydrographic extrusion orifice 223. On the other hand, it is also possible that a plurality of first pressing means and two pressing means exist. A multi-layer composite stream in which the first component and the second component are alternately laminated is produced through the sea-island extrusion opening 223. The first pushing means 230, the second pushing means 231 and the sea-island extrusion opening 223 form a spin block portion C.

According to a preferred embodiment of the present invention, there is provided a liquid crystal display device including the reflective polarizer of the present invention. Specifically, FIG. 16 is an example of a liquid crystal display device employing the reflective polarizer of the present invention, in which a reflection plate 280 is inserted on a frame 270, a cold cathode fluorescent lamp 290 is mounted on an upper surface of the reflection plate 280, . An optical film 320 is disposed on the upper surface of the cold cathode fluorescent lamp 290. The optical film 320 includes a diffusion plate 321, a light diffusion film 322, a prism film 323, a reflection type polarizer 324 and the absorption polarizing film 325 are stacked in this order, but the order of lamination may be changed depending on the purpose, or a part of the constituent elements may be omitted or a plurality of them may be provided. For example, the diffusion plate 321, the light diffusion film 322, the prism film 323, and the like may be omitted from the overall configuration and may be changed in order or formed at different positions. Further, a phase difference film (not shown) or the like can also be inserted at an appropriate position in the liquid crystal display device. Meanwhile, the liquid crystal display panel 310 may be positioned on the upper surface of the optical film 320 by being inserted into the mold frame 300.

The light emitted from the cold cathode fluorescent lamp 290 reaches the diffuser plate 321 of the optical film 320. The light transmitted through the diffusion plate 321 passes through the light diffusion film 322 in order to advance the proceeding direction of the light perpendicularly to the optical film 320. The film having passed through the light diffusion film 322 reaches the reflection type polarizer 324 after passing through the prism film 323, thereby causing light modulation. Specifically, the P wave passes through the reflection type polarizer 324 without loss, but light modulation (reflection, scattering, refraction, etc.) occurs in the case of the S wave and is reflected again by the reflection plate 280, which is the back surface of the cold cathode fluorescent lamp 290 And the properties of the light are randomly changed into a P wave or an S wave, and then pass through the reflective polarizer 324 again. And then reaches the liquid crystal display panel 310 after passing through the absorption polarizing film 325. [ As a result, when the reflective polarizer of the present invention is inserted into a liquid crystal display device due to the above-described principle, remarkable improvement in luminance can be expected as compared with a general reflective polarizer. Meanwhile, the cold cathode fluorescent lamp 290 may be replaced with an LED.

In the present invention, the use of the reflective polarizer is described mainly with respect to the liquid crystal display, but the present invention is not limited thereto, and can be widely used in flat panel display technologies such as projection display, plasma display, field emission display and electroluminescence display.

Hereinafter, the present invention will be described in detail with reference to Examples and Experimental Examples. The following Examples and Experimental Examples are merely illustrative of the present invention, and the scope of the present invention is not limited to the following Examples and Experimental Examples.

≪ Example 1 >

The process was performed as shown in FIG. Specifically, a mixture of PEN having a refractive index of 1.65 as a first component and dimethyl terephthalate and dimethyl-2,6-naphthalene dicarboxylate as a second component in a molar ratio of 6: 4 was mixed with ethylene glycol (EG) and 1 : 2, a refractive index of 1.64 and a refractive index obtained by polymerizing 90 wt% of polycarbonate and 10 wt% of polycyclohexylene dimethylene terephthalate (PCTG) as a skin layer component 1.58 were injected into the first extruding portion, the second extruding portion and the third extruding portion, respectively. The extrusion temperature of the first component and the second component was 295 캜, and Cap. The polymer flow was calibrated through adjustment and the skin layer was subjected to an extrusion process at a temperature level of 280 占 폚.

4 and 5 were used to produce a multilayer composite flow. Specifically, the first component transferred from the first extruding portion is distributed to the seawater extrusion portion, and the second component transferred from the second extruding portion is transferred to the seawater extrusion portion. The sea-island extrusion port consists of four groups with different slit diameters so that the average optical thickness is different, and one group consists of 300 slit layers. The slit thickness of the seawater extrusion orifice on the bottom surface of the fifth pickling distribution plate of Fig. 5 is 0.26 mm for the first group, 0.21 mm for the second group, 0.17 mm for the third group and 0.30 mm for the fourth group, The diameter of the outlet was 15 mm and 15 mm.

Then, skin layer components flowed through the flow path from the third extruded portion to form a skin layer on the upper and lower surfaces of the core layer polymer. The spread of the core layer polymer on which the skin layer was formed was induced in the coat hanger die of Figs. 12 and 13, which corrected the flow rate and pressure gradient. Specifically, the width of the die inlet is 200 mm, the thickness is 20 mm, the width of the die outlet is 960 mm, the thickness is 2.4 mm, and the flow rate is 1 m / min. Then, a smoothing process was performed on the cooling and casting rolls and stretched 6 times in the MD direction. Then, heat fixation was carried out through an IR heater at 180 ° C for 2 minutes to produce a multilayer reflective polarizer as shown in FIG. The refractive index (nx: 1.88, ny: 1.64, nz: 1.64) of the first component of the produced reflective polarizer was 1.64 and the refractive index of the second component was 1.64. One group consisted of 300 layers (150 repetition units), the thickness of the repeating unit was 168 nm, the average optical thickness was 275.5 nm, and the optical thickness variation was about 20%. The second group consisted of 300 layers (150 repetition units), the thickness of the repeating unit was 138 nm, the average optical thickness was 226.3 nm, and the optical thickness variation was about 20%. The third group consisted of 300 layers (150 repetition units), the thickness of the repeating unit was 110 nm, the average optical thickness was 180.4 nm, and the optical thickness variation was about 20%. 4 group had 300 layers (150 repetition units), the thickness of the repeating unit was 200 nm, the average optical thickness was 328 nm, and the optical thickness variation was about 20%. The thickness of the core layer of the manufactured multilayer reflective polarizer is 92.4 탆, and the thickness of the skin layer is 153.8 탆 at the top and bottom, respectively.

≪ Example 2 >

The 800-layer reflection type polarizer was produced in the same manner as in Example 1, except that the number of layers of the sea-island extrusion-opening was 800 units. The thickness of the final core layer was 82 mu m and the thickness of the skin layer was 159 mu m and 400 mu m respectively at the top and bottom.

≪ Comparative Example 1 &

A 1200-layer reflection type polarizer was produced in the same manner as in Example 1 except that the thickness of the slits of the fifth extrusion opening was 0.21 mm.

<Experimental Example>

The following properties were evaluated for the reflection type polarizers prepared in Examples 1 to 2 and Comparative Example 1, and the results are shown in Table 1.

1. Transmittance

Transmission axis transmittance and reflectance axis transmittance were measured by ASTM D1003 method using COH300A analysis equipment of NIPPON DENSHOKU, Japan.

2. Polarization degree

The degree of polarization was measured using a RETS-100 analyzer from OTSKA.

3. Relative luminance

In order to measure the brightness of the produced reflective polarizer, the following procedure was performed. The panel was assembled on a 32 "direct-type backlight unit equipped with a diffuser plate and a reflective polarizer, and the brightness was measured at nine points using a BM-7 meter of Topcon Co. The average value was shown.

Relative luminance is a relative value of luminance of another embodiment when the luminance of the reflective polarizer of Example 1 is taken as 100 (standard).

Relative luminance (%) Polarization degree (? = 550 nm) Polarization degree (? = 650 nm) Polarization degree Transmission axis transmittance Reflective axis transmittance Polarization degree Transmission axis transmittance Reflective axis transmittance Example 1 100 87.4% 89% 6% 81.8% 90% 9% Example 2 96 83.5% 89% 8% 78.2% 90% 11% Comparative Example 1 92 89.4% 89% 5% 59.3% 90% 23%

As can be seen from Table 1, the reflective polarizers of Examples 1 and 2 of the present invention exhibited not only a relative luminance higher than that of the comparative example but also a uniform degree of polarization over the entire visible light region in the degree of polarization.

Since the reflective polarizer of the present invention has excellent light modulation performance, it can be widely used in fields where optical modulation is required. Specifically, it can be widely used in flat panel display technologies such as a liquid crystal display device, a projection display, a plasma display, a field emission display, and an electroluminescence display which require high brightness such as a mobile display, an LCD and an LED.

Claims (27)

A core layer in which the first component and the second component are alternately laminated and remind A method for producing a multilayer reflective polarizer comprising a skin layer formed on at least one side of a core layer,
(1) supplying the first component, the second component, and the skin layer component to the extruding portions, respectively;
(2) the repeating units of the first component and the second component form alternately stacked multi-layer composite streams, the multi-layer composite stream reflecting the transverse waves of the desired wavelength (S wave) and forming the average optical thickness of the repeating units differently And a slit-shaped separating plate having a plurality of slit-shaped discharge paths, the slit-shaped separating plate having a plurality of slit-shaped discharge paths, the slits having a plurality of slit- Injecting a first component and a second component transferred from the extruder to form and discharge a multi-layer composite stream, and laminating at least one surface of the multi-layer composite stream with a skin layer component transferred from the extruder; And
(3) inducing spreading of the multi-layer composite stream in which the skin layer is laminated in the flow control section,
Wherein the plurality of detachment distribution plates further comprise an upper detachment distribution plate stacked on top of the slit type detachment distribution plate and a lowermost detachment distribution plate stacked below the slit type detachment distribution plate,
Wherein the upper detachment distribution plate comprises at least two detachment distribution plates stacked in a vertical direction and wherein the detachment distribution plate disposed at the lower one of the at least two detachment distribution plates includes a detent plate The number of the detaching holes through which the first component and the second component respectively flow out is disposed adjacent to and above the first component and the second component so that the flow of the first component and the second component is branched so that the first component and the second component flow out in an increased flow number Is designed to be greater than the number of detention halls of the detention distribution plate,
Wherein the slit-type pickling distribution plate has a plurality of slit-shaped discharge passages for allowing the first component and the second component introduced through the upper pickling distribution plate to alternately form a multilayer composite flow,
The first component and the second component transferred through the upper pickling distribution plate are alternately introduced into each of the plurality of slit-shaped discharge paths of the slit-shaped pick-up distributor plate, and one slit- Characterized in that the component is introduced into the plurality of streams to form a polymer stream of a single repeating unit shape. The method according to claim 1,
Wherein the holding distribution plate forms a plurality of groups having the same diameter of the slits to form a group having the same optical thickness between the repeating units. 3. The method of claim 2,
Wherein the holding distribution plates form four groups. &Lt; RTI ID = 0.0 &gt; 15. &lt; / RTI &gt; 3. The method of claim 2,
Wherein a diameter of the slits between the groups is different in order to set different average optical thicknesses among the plurality of groups. The method according to claim 1, further comprising the steps of (1) and (2)
And the second component transferred from the extruding unit is discharged through the second pressing unit to the sea-island extrusion orifice. The method according to claim 1, further comprising the steps of (1) and (2)
Wherein the first component transferred from the extruding unit is discharged through the first pressing unit to the seawater extrusion orifice. The method according to claim 1,
Wherein the diameter of the slits forming one of the repeating units is different. The method according to claim 1,
Wherein the number of the slit layers is 100 or more. The method according to claim 1,
Wherein the sea-island extrusion nozzle has a number of slit layers of 200 or more. The method according to claim 1,
Wherein the number of the slit layers is 400 or more. The method according to claim 1,
Characterized in that the number of layers of the grating holes of each sea-island extrusion orifice is 800 or more. The method according to claim 1,
Wherein the sea-island type extrusion orifice has a number of layers of at least 1200 holes in each of the sea-island extrusion orifices. 2. The method of claim 1, wherein the flow control is a T-die. 2. The method of claim 1, wherein the flow control is a coat-hanger die. The method according to claim 1, wherein, after the step (3)
And a step of stretching the multilayer reflective polarizer. A core layer in which the first component and the second component are alternately laminated and remind An apparatus for manufacturing a multilayer reflective polarizer including a skin layer formed on at least one side of a core layer,
Three or more extruders into which the first component, the second component and the skin layer component are separately introduced;
The repeating units of the first component and the second component form alternately stacked multi-layer composite streams, and the multi-layer composite stream is formed by reflecting the transverse waves (S waves) of a desired wavelength and forming the average optical thicknesses of the repeating units differently. And a slit-shaped separator plate having a plurality of slit-shaped discharge paths having a part or all of different slits between repeating units forming a multi-layer composite stream by feeding the first component and the second component transferred from the extruding unit A spin block part including a single sea type extrusion nozzle integrally formed by laminating a plurality of detachment distribution plates and communicating with the extruded part into which the skin layer component is injected, so that the skin layer is joined to at least one surface of the multi- And
And a flow control unit for guiding the spread of the multi-layer composite flow including the skin layer conveyed in the spin block unit,
Wherein the plurality of detachment distribution plates further comprise an upper detachment distribution plate stacked on top of the slit type detachment distribution plate and a lowermost detachment distribution plate stacked below the slit type detachment distribution plate,
Wherein the upper detachment distribution plate includes at least two detachment distribution plates stacked in a vertical direction, wherein the detachment distribution plate disposed at the lower one of the at least two detachment distribution plates includes a detent plate The number of the detaching holes through which the first component and the second component respectively flow out is disposed adjacent to and above the first component and the second component so that the flow of the first component and the second component is branched so that the first component and the second component flow out in an increased flow number Is designed to be greater than the number of detention halls of the detention distribution plate,
Wherein the slit-type pickling distribution plate has a plurality of slit-shaped discharge passages for allowing the first component and the second component introduced through the upper pickling distribution plate to alternately form a multilayer composite flow,
The first component and the second component transferred through the upper pickling distribution plate are alternately introduced into each of the plurality of slit-shaped discharge paths of the slit-shaped pick-up distributor plate, and one slit- Wherein the polymer stream is injected in a plurality of streams to form a polymer stream having a single repeating unit shape. 17. The apparatus for manufacturing a multilayer reflective polarizer according to claim 16, wherein the spin block portion includes first pressing means for discharging the first component transferred from the extrusion portion and supplying the discharged first component to the sea-island extrusion orifice. The apparatus for manufacturing a multilayer reflective polarizer according to claim 16, wherein the spin block portion includes a second pressing means for discharging the first component transferred from the extrusion portion and supplying the discharged first component to the sea-island extrusion orifice. 17. The method of claim 16,
Wherein the holding distribution plate forms a plurality of groups having identical slit diameters to form a group having the same optical thickness between the repeating units. 20. The method of claim 19,
Wherein the holding distribution plates form four groups. &Lt; RTI ID = 0.0 &gt; 15. &lt; / RTI &gt; delete 17. The method of claim 16,
Wherein the number of the slit layers is 100 or more. 17. The method of claim 16,
Wherein the number of the slit layers is 200 or more. 17. The method of claim 16,
Wherein the number of the slit layers is 400 or more. 17. The method of claim 16,
Wherein the number of the slit layers is at least 600. The apparatus for manufacturing a multilayer reflective polarizer according to claim 1, 17. The apparatus of claim 16, wherein the flow controller is a T-die. 17. The apparatus of claim 16, wherein the flow control unit is a coat-hanger die.

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