CN102405426A - Method for manufacturing polarizing plate - Google Patents
Method for manufacturing polarizing plate Download PDFInfo
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- CN102405426A CN102405426A CN2010800022373A CN201080002237A CN102405426A CN 102405426 A CN102405426 A CN 102405426A CN 2010800022373 A CN2010800022373 A CN 2010800022373A CN 201080002237 A CN201080002237 A CN 201080002237A CN 102405426 A CN102405426 A CN 102405426A
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- polaroid
- laser
- cutting
- cut
- film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/023—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets using multilayered plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
- B29C37/0075—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other using release sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2031/00—Use of polyvinylesters or derivatives thereof as moulding material
- B29K2031/04—Polymers of vinyl acetate, e.g. PVAc, i.e. polyvinyl acetate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0034—Polarising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/16—Drying; Softening; Cleaning
- B32B38/162—Cleaning
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polarising Elements (AREA)
Abstract
The present invention relates to a method for manufacturing a polarizing plate. Specifically, the method comprises: a pretreatment process of preparing, washing and drying a PVA film, first and second TAC films, a protective film, and a release film; a stretching process of stretching the PVA film while stacking the first TAC film on one side of the PVA film and stacking the second TAC film on the other side of the PVA film; a coating and laminating process of coating an adhesive agent and stacking the release film on the surface of the second TAC film while laminating the protective film on the surface of the first TAC film to form a polarizing plate; an inspecting process of inspecting the polarizing plate; a laser cutting process of cutting the polarizing plate, for which the inspection has been finished, by a laser to cut individual parts; and a packing process of packing the parts which have been cut by the laser. The method for manufacturing a polarizing plate makes it possible to simplify the cutting and inspecting of the polarizing plate to reduce the manufacturing costs, to improve the quality of the cut surface of the polarizing plate, and to increase the uniformity of the polarizing plate.
Description
Technical field
The present invention relates to a kind of method for preparing polaroid, said polaroid is the blooming that is used in the LCD.
The right of priority that the korean patent application that the application requires to submit to Korea S Department of Intellectual Property (KIPO) on May 28th, 2010 is 10-2010-0050582 number, the disclosed content of this patented claim is all introduced this paper by reference.
Background technology
CRT (cathode-ray tube (CRT)) is a kind of display that in the prior art field, generally uses, and is used as the display screen of televisor, pick-up unit, information terminal device etc. usually.But it is difficult to satisfy reducing the demand of electronic product size and weight.
In order to substitute CRT, people have developed small and light LCD, and develop into recently and be enough to as flat-panel monitor, so demand increases just gradually.
The image-forming principle of LCD is to utilize the optical anisotropy and the polarization property of liquid crystal.Liquid crystal has the asthenic molecular structure, and depends on the anisotropy of molecular arrangement and orientation and the polarization property that on molecular arrangement and orientation, changes according to extra electric field intersity limitation system.LCD comprises: as the liquid crystal panel of primary element, said liquid crystal panel comprises a pair of transparent insulation substrate and places liquid crystal layer therebetween.Be formed on the electrode of the formation electric field on the apparent surface of transparent insulation substrate in addition.The orientation of regulating liquid crystal molecule artificially through the electric field between the electrode that change to form electric field, thus the variation of light transmission caused, to be used to show various images.
In this situation, the upper and lower that polaroid is placed in liquid crystal panel is with the change in orientation of the liquid crystal that manifests LCD.Each polaroid all sees through and the parallel polarisation of light component of the axis of homology (transmission axis).The arrangement of the axis of homology of these two polaroids and the arrangement of liquid crystal have determined the optical transmission rate.
Fig. 1 is the synoptic diagram of the conventional polaroid of expression.As shown in the drawing, polarization plates 1 comprises: polarization layer 2 wherein is formed with the polarization axle that changes polarisation of light property, and stretches with high tension and to prepare as the PVA that is mixed with iodine (polyvinyl alcohol (PVA)) of polaroid; The first and second TAC films (tri acetyl cellulose membrane) 3 that form in the both sides of polarization layer 2 and 4 are with protection and support polarization layer 2; On a side of a TAC film 3, form diaphragm 5, to prevent the surperficial impaired of polaroid 1; And the stripping film 7 that on a side of the 2nd TAC film 4, forms with the bonding agent 6 that is arranged between the 2nd TAC film 4 and the stripping film 7.
As shown in Figure 2, be prepared as follows polaroid 1.At first, the stock roll (Fig. 2 (a)) of preparation PVA film, TAC film (a TAC film and the 2nd TAC film), diaphragm and stripping film.Next, carry out in rinse bath cleaning stock roll and the pre-treatment step (Fig. 2 (b)) of dried feed volume in drying box.Then, thus through in stretching PVA film in the both sides of PVA film volume (Fig. 2 (c)) in the middle of lamination the one TAC film and the 2nd TAC film form.Subsequently, through surperficial laminated diaphragm, be used in simultaneously and bonding agent is set between the 2nd TAC film and the stripping film forms polaroid volume (Fig. 2 (d)) at the surperficial laminated stripping film of the 2nd TAC film at a TAC film.Then, in clipping press (clipping press), polaroid cutting (cutting) is become various sizes (Fig. 2 (e)), and detect and encapsulation step (Fig. 2 (f)) with stamping parts (punch).
With reference to the flow chart description of Fig. 3 the method for preparing polaroid according to prior art.With reference to Fig. 3, at first, prepare the for example raw material of PVA film, a TAC film, the 2nd TAC film, diaphragm and stripping film, and clean the pre-treatment step (S1) with dried feed.Then, carry out the stretching step (S2) of stretching PVA film in a side laminated the one TAC film of PVA film and opposite side laminated the 2nd TAC film at the PVA film.Subsequently, carry out applying the surface and the lamination stripping film above that of the 2nd TAC film, simultaneously protective film is pressed in the lip-deep coating and the lamination step (S3) of a TAC film with bonding agent.Next, carry out in clipping press, its shearing (clipping) being become the punching press of the polaroid of various sizes shear step (S4) with stamping parts, and the grinding steps (S5) at the edge of the polaroid of processing (grinding) each shearing.Subsequently, the encapsulation step (S7) that with the naked eye detects the detection step (S6) of each polaroid and encapsulate each product.The product that shipment is handled through above-mentioned steps.
Shear in the step (S4) in punching press,, it is cut into size greater than final products for milled border in grinding steps.
But,, process the grinding steps on cutting surface owing in preparation method, shear polaroid with stamping parts according to the polaroid of prior art.And then, owing to behind grinding steps, to the naked eye detect single product, so this preparation method can spend plenty of time and cost.
Summary of the invention
One object of the present invention is to provide a kind of method for preparing polaroid, and this method has been simplified the shearing and the detection of polaroid, thereby has reduced manufacturing cost.
Another object of the present invention is to provide a kind of method for preparing polaroid; This method is through changing the angle of polarisation of light component; It is tilted with respect to the orientation of polaroid lattice at a predetermined angle, improved the uniformity coefficient of the cut surface and the polaroid of polaroid.
According to an aspect of the present invention, a kind of method for preparing polaroid is provided, said method comprises: the pre-treatment step of preparation, cleaning and dry PVA film, a TAC film, the 2nd TAC film, diaphragm and stripping film; Stretching PVA film is simultaneously at a side laminated the one TAC film of PVA film with in the stretching step of opposite side laminated the 2nd TAC film of PVA film; Apply the surface and the lamination stripping film above that of the 2nd TAC film with bonding agent, simultaneously in the coating and the lamination step of the surperficial laminated diaphragm of a TAC film; The detection step of the polaroid of coating and lamination step has been passed through in detection; The laser shearing step that the polaroid that will detect with laser cut and cut into single product; And encapsulation is with the encapsulation step of the product after the cut.
Said laser is sheared step and is comprised: on the direction parallel, shear laser rip cutting (laser slitting) step of polaroid with the lattice arrangement direction, and through shearing the cut step of the polaroid after the cutting in laser rip cutting step at cutting polaroid on the direction vertical with the lattice arrangement direction.
Said laser is sheared step and can also be comprised: shear the cut step of polaroid through cutting polaroid on the direction vertical with the lattice arrangement direction, and in the laser rip cutting step of shearing the polaroid after the cutting in the cut step on the direction parallel with the lattice arrangement direction.
In said detection step, be marked at laser and shear the part that will be tailored (trimmed) in the step, and when detecting polaroid automatically, carry out flaw labeling and detect.
Can before laser is sheared the cut step of step, carry out flaw labeling detects.
Shear in the step at laser; When laser beam penetrates from laser beam sources; Through the polarization regulon, be tilted in perpendicular or parallel linear polarization component of on the polaroid cut direction, arranging with the polarization anglec of rotation, thereby cut out polaroid with respect to polaroid lattice arrangement direction.
Laser is sheared step can be included in the laser rip cutting step of shearing polaroid on the direction parallel with lattice arrangement direction (transmission working direction); And the cut step through the polaroid after the cutting polaroid is sheared in laser rip cutting step cutting on the direction vertical with the lattice arrangement direction, and at the state down cut polaroid of polarization rotation angle (α) in ± 30 ° to ± 60 ° scope.
Laser is sheared step can also comprise the cut step of shearing polaroid through cutting polaroid on the direction vertical with the lattice arrangement direction; And in the laser rip cutting step of shearing the polaroid after the cutting in the cut step on the direction parallel, and at the state down cut polaroid of polarization rotation angle (α) in ± 30 ° to ± 60 ° scope with the lattice arrangement direction.
According to the method for preparing polaroid of embodiment of the present invention, detect polaroid automatically and carry out mark and shearing, thereby can omit grinding steps with laser.And then, owing to after with cut, implementing immediately to encapsulate to omit grinding steps, therefore can reduce manufacturing time and reduce manufacturing cost.
And, through changing polarized component it is tilted at a predetermined angle with respect to the orientation of polaroid lattice, can improve the uniformity coefficient of polaroid quality of cut surface and polaroid.
Description of drawings
Fig. 1 is the synoptic diagram of the conventional polaroid of expression;
Fig. 2 is the synoptic diagram of the conventional method of expression preparation polaroid;
Fig. 3 is the process flow diagram of expression according to the method for prior art for preparing polaroid;
Fig. 4 is the process flow diagram of expression according to the method for preparing polaroid of one embodiment of the present invention;
Fig. 5 is used for the synoptic diagram according to an example of the RTS laser shearer of the method for preparing polaroid of one embodiment of the present invention for expression;
Fig. 6 is used for the synoptic diagram according to another example of the RTS laser shearer of the method for preparing polaroid of one embodiment of the present invention for expression;
Fig. 7 is the perspective illustration of example of cut unit of the RTS laser shearer of presentation graphs 5 or Fig. 6;
Fig. 8 is the detailed perspective view of the polarization regulon shown in the presentation graphs 7;
Fig. 9 is illustrated in the detailed perspective view that concerns between polarization regulon shown in Fig. 8 and the laser beam;
Figure 10 and 11 is the enlarged perspective of the linear polarization component of expression optically focused head, polaroid and laser beam;
Figure 12 is illustrated in the diagrammatic sketch that lattice arrangement direction and the rectangular state of polarized component of shearing emitted laser bundle in the step at laser cut the comparative example of polaroid down;
Figure 13 is the plane photograph that is illustrated in the cutting surface of the polaroid of cutting under the state shown in figure 12;
Figure 14 is the amplification profile on the cutting surface of the polaroid of expression cutting shown in figure 13;
Figure 15 is for representing according to the plane photograph of an embodiment of the invention through the cutting surface of the polaroid of emitted laser bundle (having 45 ° polarized component) cutting in laser shearing step;
Figure 16 is the amplification profile on the cutting surface of the polaroid of expression cutting shown in figure 15;
Figure 17 is for representing according to the plane photograph of an embodiment of the invention through the cutting surface of the polaroid of emitted laser bundle (having 60 ° polarized component) cutting in laser shearing step;
Figure 18 is for representing according to the plane photograph of an embodiment of the invention through the cutting surface of the polaroid of emitted laser bundle (having 70 ° polarized component) cutting in laser shearing step.
Embodiment
Below, will be with reference to detailed description of the drawings embodiment of the present invention.
Fig. 4 is the process flow diagram that has shown according to the method for preparing polaroid of an embodiment of the invention.As shown in Figure 4, the method for preparing polaroid comprises: pre-treatment step (S10) promptly prepares, cleaning and dry PVA film, a TAC film, the 2nd TAC film, diaphragm; Stretching step (S20), promptly in a side lamination the one TAC film and opposite side lamination the 2nd TAC film of said PVA film at said PVA film, stretching PVA film; Apply and lamination step (S30), promptly in the surface with diaphragm lamination the one TAC film, the use bonding agent applies the surface of said the 2nd TAC film, and lamination stripping film above that; Detect step (S40), promptly detect polaroid through said coating and lamination step; Laser is sheared step (S50), and the polaroid that promptly will detect with laser is cut into single product; And encapsulation step (S70), promptly encapsulate with the product after the cut.
When carrying out according to each step of the preparation method of this embodiment, polaroid is wound on the spool and from spool launches, and through travelling belt and supporting reel transmission.Per two or per three steps can be carried out continuously, perhaps, can carry out Overall Steps continuously.
Pre-treatment step (S10), stretching step (S20) and coating and lamination step (S30) are the same with the method for preparing polaroid according to prior art.Coating and lamination step (S30) can be decomposed into coating step and lamination step.
Detect the step that step (S40) is to use automatic detecting machine that polaroid is detected automatically; And mark will be sheared the part of shearing in the step (S50) at laser; So that laser shearer (described in hereinafter) is sheared; Simultaneously, shear flawless product of differentiation and defective product in the step at laser.
Laser is sheared step (S50) and is comprised laser rip cutting step (S52); Promptly go up and shear polaroid in the direction that is parallel to the lattice arrangement direction (transmission working direction); And cut step (S54), promptly on perpendicular to the direction of lattice arrangement direction, shear the polaroid after the cutting in laser rip cutting step (S52).
Said laser rip cutting step (S52) and cut step (S54) can be carried out through independent laser cutting machine and shearer, perhaps carry out through a shearer.
In this embodiment, cut step (S54) and encapsulation step (S70) are carried out through using a RTS (volume is to sheet (roll to sheet)) laser shearer.And laser rip cutting step (S52) is to carry out with independent laser shearer.The flaw labeling that detects step (S40) detects and in the RTS shearer, carries out before in cut step (S54).
Fig. 5 is the synoptic diagram that explanation is used for the example of RTS laser shearer of the present invention.As shown in Figure 5, RTS laser shearer 60 comprises: launch unit 61, it has loaded the polaroid volume through laser rip cutting step (S52 among Fig. 4); Tension adjustment unit (dancer unit) 62, it is used for stopping and controlling between moving period to keep constant tension at polaroid; Feed unit (infeed unit) 63, it is used for the speed continuous feed polaroid of setting, and is determined at the accuracy of size on the working direction; Marker detection unit 64, it has connection shooting inductor on it, with the mark part of induction in detecting step (S40 among Fig. 4) defectiveness mark whether; Cut unit 65, it cuts polaroid according to mark line on Width; Travelling belt 66, it transmits the polaroid after the cutting; And encapsulation travelling belt 67, the polaroid that it transmits through travelling belt 66 with the packaging container encapsulation.
Said cut unit 65 is the unit that are used in the laser beam cutting polaroid that produces in the carbon dioxide laser head, and passes through travelling belt 66 and encapsulation travelling belt 67 transmission and encapsulation by the polaroid of cut.Therefore, different with prior art is, does not need independent grinding steps, or the independent detection step after grinding steps.
Fig. 6 is the synoptic diagram that another example of the RTS laser shearer that is used for an embodiment of the invention is described.As shown in Figure 6, RTS laser shearer 160 comprises: launch unit 161, it loads the polaroid volume through laser rip cutting step (S52 among Fig. 4); Tension adjustment unit 162, it is used for stopping and controlling between moving period to keep constant tension at polaroid; Feed unit 163, it is used for the speed continuous feed polaroid of setting, and is determined at the accuracy of size on the working direction; Marker detection unit 164, whether the defectiveness mark is to detect through the mark part of induction in detecting step (S40 among Fig. 4) for it; Cut unit 165, it cuts polaroid according to mark line on Width; Measuring unit 166, it measures square degree and size in real time through before cutting, using camera immediately; Laser travelling belt 167, it absorbs, fixes and transport polaroid during cut; Inclination travelling belt 168, it discharges the cutting waste material later in cut at the flaw labeling place; Travelling belt 169-1, it transports the polaroid after the cutting; Delivery unit 169-2, its a slice is transported the polaroid after the cutting with connecing a slice; And polarization plates load unit 169-3, it is arranged on the box packaging container on downstream one side of travelling belt 169-1, and the polaroid after the encapsulation cutting immediately.
That is to say; The RTS laser shearer (Fig. 6) of this embodiment is used for through using camera to measure the square degree and the size of polaroid in real time; And in cut step (S54) cutting polaroid; After cut step (S54), discharge the cutting waste material that has the polaroid flaw labeling through inclination travelling belt 168; And carriage (carriages) (or box packaging container) is arranged on downstream one side of travelling belt 169-1 (it transports the polaroid after the cutting); And the polaroid after the encapsulation cutting immediately or in encapsulation step (S70), will cut after polaroid be put in the carriage (or box packaging container), it is transported on the polarization plates attachment processing line, the polaroid after here will cutting is transported to the annex storehouse with subsequent use.
Like Fig. 7 and shown in Figure 8; The cut unit 65 (or 165) of the RTS laser shearer 60 (or 160) that uses in the method for preparing polaroid according to embodiment of the present invention comprises support 103; Laser beam sources 105; Optically focused head 107, polarization regulon 109, and laser beam transmitter (transmitter) 111.
At this, support 103 constitutes the shell of cut unit 65 (or 165), and is set on the production line, as the part of the whole technology of handling the polaroid 110 that will use cut unit 65 (or 165) cutting.
For this purpose; Through conveyer 113 (like the travelling belt of installing along whole production line) polaroid 110 is put into support 103 in the example depicted in fig. 7, thus the laser beam B cutting polaroid 110 through sending by the optically focused head 107 that is installed in support 103 tops.
Said optically focused head 107 is to make the device that is exposed to polaroid 110 by laser beam sources 105 emitted laser bundle B; It is assembled on the part of the top board 112 in the upper reaches that are fixed on production line; Perhaps be installed into top board 112 and move; Perhaps can move, with cutting polaroid 110 with respect to top board 112.
In the case; Polarization rotation angle α is the angle of the linear polarization component P (its cut direction with the polaroid 110 that with respect to 107 motions of optically focused head the time, is cut meets at right angles or be parallel) of laser beam B with respect to the orientation rotation of the lattice L of the polaroid that will be tilted 110; Preferably in ± 30 ° to ± 60 ° scope; And it is more preferably in ± 45 ° scope, as shown in Figs. 7-9.
Shown in the comparative example among Figure 12; When the linear polarization component P of the laser beam B of sending by the optically focused head 107 that moves with respect to the polaroid that will be cut 110 with said linear polarization component P during perpendicular to the state cutting polaroid 110 of the orientation of lattice L; Like Figure 13 and shown in Figure 14, quality of cut surface is relatively poor.In view of the above; When adhering to polaroid 110 outermost film protective seams and after laser is sheared step, will remove adhesive tape and adhere to film protective seam (diaphragm) last time in order to remove; Because surperficial inhomogeneous (shown in figure 14) of polaroid 110; Removing adhesive tape can not adhere to securely, therefore, can not thoroughly remove the film protective seam.
But,, just can improve the polaroid quality of cut surface significantly, like Figure 15 and (an embodiment of the invention) shown in Figure 16 if the linear polarization component P of laser beam B is tilted 45 ° with respect to the orientation of lattice.Especially, when the polarization rotation angle is 45 °, can under whether the lattice arrangement direction that need not check polaroid is vertical or parallel to the situation of cut direction, improve quality of cut surface significantly.
In addition, shown in figure 16, owing to not only evenly kept the cutting surface; And evenly kept and the adjacent polaroid superficial layer in cutting surface, therefore, especially; Have at polaroid under the situation of stepped construction, adhere on the diaphragm when peeling off the diaphragm that forms superficial layer, said removing adhesive tape is closely contacted with diaphragm when removing adhesive tape; And therefore, after shearing, can remove diaphragm smoothly with removing adhesive tape in zero defect ground, thereby improve process efficiency.
Quality of cut surface depends on the angle that linear polarization component tilts.When polarization rotation angle α was 45 °, quality of cut surface is best, and was shown in figure 16.When polarization rotation angle α was 30 ° or 60 °, quality of cut surface is in tolerance range, and was shown in figure 17.But, when polarization rotation angle α less than 30 ° or during greater than 60 °, the remarkable variation of quality of cut surface, shown in figure 18 under 70 ° situation, and when polarization rotation angle α was 90 °, quality of cut surface is the poorest, and was shown in figure 14.
Simultaneously, polarization regulon 109 can be the existing polarization adjuster spare of selling with modular form as shown in Figure 7, and can be manufactured into the optical system that is used for like Fig. 8 and application target shown in Figure 9.In the case, polarization regulon 109 comprises main reflective mirror 109a, fill-in reflector 109b and the support bar 109c that supports them.
It is adjacent with laser beam (B) outgoing side of laser beam sources 105 that said main reflective mirror 109a is installed into, and reflection is by the laser beam B of laser beam sources 105 outputs, simultaneously with laser beam B rotatory polarization rotation angle α.In the case, the rotation of laser beam B should be carried out on the plane identical with the coordinate plane C of laser beam B and linear polarization component P formation, in order to avoid depart from coordinate plane C.
Said fill-in reflector 109b dresses up the Bei'an adjacent with main reflective mirror 109a, and is set at coordinate plane C and goes up with reflection lasering beam B, on the direction perpendicular to coordinate plane C, to reflect with polarization rotation angle α that main reflective mirror 109a becomes to be scheduled to.
To shown in Figure 9, laser beam transmitter 111 is assembled into the laser beam B (that is the laser beam B that the polarized component that, is wherein reflected by fill-in reflector 109b is tilted) by 109 outputs of polarization regulon is sent to optically focused head 107 like Fig. 7.For this purpose, a plurality of laser beam transmitters are installed between laser beam sources 105 and the optically focused head 107, that is, and and between polarization regulon 109 and optically focused head 107.
It is to shear the step of the polaroid 110 that is positioned over clipped position with laser beam B that laser is sheared step (S50).As shown in Figure 7, cutting polaroid 110 on the direction parallel or vertical with the orientation of lattice L.Like Fig. 8 and shown in Figure 9; Owing to the linear polarization component P of laser beam B (it is arranged in perpendicular or parallel on the cut direction of polaroid 110) has been rotated polarization rotation angle α with respect to the orientation of the lattice L of polaroid 110 when being exported by laser beam sources 105 with polarization regulon 109; So that it tilts,, on the coordinate plane C that forms by laser beam B and linear polarization component P, rotated polarization rotation angle α simultaneously so reflect through main reflective mirror 109a by the laser beam B of laser beam sources 105 outputs; For example 45 °, and the linear polarization component P of reflection lasering beam B is with respect to the perpendicular line polarization rotation angle α that tilted.For this purpose, main reflective mirror 109a is configured to be inclined to polarization rotation angle α with horizontal line.
Subsequently, pass through fill-in reflector 109b secondary reflection again by main reflective mirror 109a laser light reflected bundle B, to enter on the direction perpendicular to coordinate plane C.Therefore, as shown in Figure 9, with linear polarization component P with respect to the perpendicular line polarization rotation angle α that tilted.
, to shown in Figure 9 laser beam B (it has the polarized component P of the polarization rotation angle α that tilted in the above described manner) is reflected in comprising the laser beam transmitter 111 of one or more reflective mirrors like Fig. 7, to arrive optically focused head 107; And when laser beam B exposes to 110 last times of polaroid by optically focused head 107; With polarized component P with respect to the cut direction of the polaroid 110 polarization rotation angle α that tilted, thereby its orientation with respect to the lattice L of polaroid 110 has been tilted ± α, promptly; When lattice L shown in figure 10 arranges perpendicular to cut direction; It has been tilted+α, and when lattice L shown in figure 11 was parallel to the cut direction arrangement, it had been tilted-α.
When laser is sheared step (S50) by laser rip cutting step (S52) and cut step (S54) when forming; In said laser rip cutting step (S52); Vertical (promptly parallel with the orientation of lattice L direction) at the lattice L through extension elongation goes up the polaroid 110 after cutting stretches; On the contrary, in said cut step (S54), with the vertical direction of the orientation of lattice L on the polaroid 110 that on the direction parallel, cut of cutting with the orientation of lattice L.
Simultaneously, though do not show separately, shear in the step (S50) at laser, cut step (S54) can be carried out prior to laser rip cutting step (S52).In the case; In said cut step (S54); At first on the direction vertical, cut polaroid 110 with the orientation of lattice L; And in laser rip cutting step (S52) subsequently, cutting the polaroid 110 that in cut step (S54), had cut on the direction parallel with the orientation of lattice L.
Though described the present invention with reference to being considered to possible implementation at present; But, should be understood that the present invention is not limited to disclosed embodiment; On the contrary, the invention is intended to contain essence and interior various variation patterns and the equivalent arrangements of scope that is included in appended claim.Therefore, the technical protection scope of reality of the present invention must be confirmed through the essence of accompanying claims.
Claims (11)
1. method for preparing polaroid, this method comprises:
The pre-treatment step of preparation, cleaning and dry PVA film, a TAC film, the 2nd TAC film, diaphragm and stripping film;
Stretching PVA film is simultaneously at a side laminated the one TAC film of PAV film with in the stretching step of opposite side laminated the 2nd TAC film of PAV film;
Through application of adhesive on the surface of the 2nd TAC film and lamination stripping film above that,, thereby form the coating and the lamination step of polaroid simultaneously at the surperficial laminated diaphragm of a TAC film;
Detect the detection step of polaroid;
The polaroid that detected is sheared the laser that becomes single product with laser shear step; And
The encapsulation step of the product of encapsulation after with cut.
2. the method for preparing polaroid according to claim 1 is characterized in that, said laser is sheared step and comprised:
On the direction parallel with the lattice arrangement direction laser rip cutting step of rip cutting polaroid and
The cut step of the polaroid after cutting rip cutting on the direction vertical with the lattice arrangement direction.
3. the method for preparing polaroid according to claim 1 is characterized in that, said laser is sheared step and comprised:
On the direction vertical with the lattice arrangement direction cutting polaroid the cut step and
The laser rip cutting step of the polaroid after rip cutting cutting on the direction parallel with the lattice arrangement direction.
4. according to any described method for preparing polaroid in the claim 2 and 3, it is characterized in that said detection step comprises:
Laser shear part that step acceptance of the bid summary is sheared and
When detecting polaroid automatically, carrying out flaw labeling detects.
5. the method for preparing polaroid according to claim 4 is characterized in that, before the cut step, carries out flaw labeling and detects.
6. according to the method for preparing polaroid described in claim 2 or 3, it is characterized in that said cut step is included in square degree and the size of measuring polaroid before the cutting immediately in real time.
7. the method for preparing polaroid according to claim 5 is characterized in that, after the cut step, discharges the cutting waste material at the flaw labeling place.
8. the method for preparing polaroid according to claim 1 is characterized in that, said encapsulation step is the polaroid after the downstream of travelling belt encapsulates cutting immediately.
9. the method for preparing polaroid according to claim 1; It is characterized in that; Shear in the step at laser; The linear polarization component that perpendicular or parallel cut direction in polaroid is arranged when penetrating from laser beam sources through will work as laser beam with the polarization regulon is sheared polaroid with respect to the lattice arrangement direction inclination polarization anglec of rotation of polaroid.
10. the method for preparing polaroid according to claim 9; It is characterized in that; Laser is sheared step and is included in the laser rip cutting step that the direction parallel with the lattice arrangement direction (transmission working direction) goes up the shearing polaroid; And the cut step through the polaroid after the cutting polaroid is sheared in laser rip cutting step cutting on the direction vertical with the lattice arrangement direction, and
At the state down cut polaroid of polarization rotation angle (α) in ± 30 ° to ± 60 ° scope.
11. the method for preparing polaroid according to claim 9; It is characterized in that; Laser is sheared step and is comprised the cut step of shearing polaroid through cutting polaroid on the direction vertical with the lattice arrangement direction; And in the laser rip cutting step of shearing the polaroid after the cutting in the cut step on the direction parallel with the lattice arrangement direction, and
At the state down cut polaroid of polarization rotation angle (α) in ± 30 ° to ± 60 ° scope.
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|---|---|---|---|
| KR10-2010-0050582 | 2010-05-28 | ||
| KR1020100050582A KR101273170B1 (en) | 2009-06-02 | 2010-05-28 | method for fabricating polarizer |
| PCT/KR2010/004054 WO2011149142A1 (en) | 2010-05-28 | 2010-06-23 | Method for manufacturing polarizing plate |
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| CN102405426A true CN102405426A (en) | 2012-04-04 |
| CN102405426B CN102405426B (en) | 2014-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201080002237.3A Active CN102405426B (en) | 2010-05-28 | 2010-06-23 | Method for manufacturing polarizing plate |
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| Country | Link |
|---|---|
| JP (1) | JP5567127B2 (en) |
| CN (1) | CN102405426B (en) |
| TW (1) | TWI413566B (en) |
| WO (1) | WO2011149142A1 (en) |
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| CN107390302A (en) * | 2016-05-17 | 2017-11-24 | 日东电工株式会社 | The manufacture method of the optical film sheet of optical laminate and the use optical laminate |
| CN108581189A (en) * | 2018-06-01 | 2018-09-28 | 业成科技（成都）有限公司 | Laser cutting method |
| CN109283609A (en) * | 2017-07-20 | 2019-01-29 | 住友化学株式会社 | The manufacturing method of polarization plates |
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- 2010-06-23 WO PCT/KR2010/004054 patent/WO2011149142A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2011149142A1 (en) | 2011-12-01 |
| JP2012518212A (en) | 2012-08-09 |
| JP5567127B2 (en) | 2014-08-06 |
| TW201141648A (en) | 2011-12-01 |
| TWI413566B (en) | 2013-11-01 |
| CN102405426B (en) | 2014-07-09 |
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