CN105980133A - Optical film manufacturing method - Google Patents
Optical film manufacturing method Download PDFInfo
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- CN105980133A CN105980133A CN201580004486.9A CN201580004486A CN105980133A CN 105980133 A CN105980133 A CN 105980133A CN 201580004486 A CN201580004486 A CN 201580004486A CN 105980133 A CN105980133 A CN 105980133A
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- Prior art keywords
- width
- stretching
- resin molding
- length direction
- fixture
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Classifications
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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
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
-
- 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
- B29C55/20—Edge clamps
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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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polarising Elements (AREA)
- Advancing Webs (AREA)
Abstract
The invention discloses an optical film manufacturing method. The present invention relates to a method of manufacturing an optical film using a tenter stretching device provided with multiple clips as holding means. This method involves holding both edges of an elongate resin film by means of clips at a conveyance-direction clip interval L1 (a holding step), to allowing the resin film to slacken in the width direction by decreasing the width-direction clip interval from W1 to W2 while conveying said resin film in the length direction (a slackening step), and stretching the resin film in the lengthwise direction by increasing the conveyance-direction clip interval to L2 while conveying, in the lengthwise direction, the resin film that has been slackened in the width direction (a stretching step).
Description
Technical field
The present invention relates to the manufacture method of a kind of blooming.
Background technology
Previously, it is known to following technology: grasp and transport the film of long shape by tentering fixture, and expand
The interval of the conveyance direction of this tentering fixture, thereby carries out stretching by this film and makes the technology of blooming
(such as, the claim 7 of patent documentation 1).For this kind of stretching technique, it is present in and draws
The side edge part being initiated at film stretched produces wrinkle or the situation of fracture, and its result exists following situation: produce
When being born in holder the side edge part of film do not contact fixture and cannot grasp problem (hereinafter referred to as " folder
Tool fault ") and cause productivity ratio to reduce.
[prior art literature]
[patent documentation]
Patent documentation 1: Japanese Patent Laid-Open 2008-26881 publication
Summary of the invention
[problem that invention to be solved]
The present invention completes to solve above-mentioned problem, and its main purpose is to provide a kind of optics
The manufacture method of film, this manufacture method includes using tentering stretching device by the resin molding of long shape in conveyance
The operation of direction stretching, and this manufacture method is the fixture that can suppress to be caused by the generation of wrinkle or fracture
The method of fault.
[solving the technological means of problem]
The present invention provides a kind of use to possess the tentering stretching device of the multiple fixtures as grasping mechanism
The method manufacturing blooming.The method includes following operation: by this fixture with the folder of conveyance direction
Tool interval L1 grasps the edge, both sides (grasping operation) of the resin molding of long shape；While by this resin molding
In length direction conveyance while making the grip separation of width reduce to W2 from W1, and make this tree
Adipose membrane is in width lax (lax operation)；And while by this resin molding lax in width
In length direction transport while the grip separation of conveyance direction to be extended to L2, and by this resin molding in
Length direction stretching (stretching process).
In an embodiment, it is 2.0 to total stretching ratio A (A=L2/L1) of length direction
Above.
In an embodiment, minimizing multiplying power B (B=W2/W1) of the grip separation of width
It is 0.60～0.99.
In an embodiment, above-mentioned lax operation includes following situation: reduce width
Grip separation, is extended to L1' by the grip separation of conveyance direction, and by above-mentioned resin molding in length
The stretching of degree direction, and to the fixture of the stretching ratio a (a=L1'/L1) of length direction Yu width
Minimizing multiplying power B (B=W2/W1) at interval meetsRelation.
In an embodiment, the thickness of manufactured blooming is below 110 μm.
In an embodiment, manufactured blooming is polarizing coating.
[invention effect]
In the manufacture method of the present invention, in making resin molding in width before the stretching of length direction
Lax.Thereby, the region before stretching to length direction forms what resin molding had relaxed in width
Relaxation area, thus can suppress to arrive in wrinkle produced by the region stretched to length direction or fracture
To stenter entrance.Its result is, can suppress the generation of fixture fault, and productivity ratio can not be made to reduce
Manufacture blooming.
Accompanying drawing explanation
Fig. 1 be an example of the spendable stretching device of the manufacture method to the present invention be monolithically fabricated into
The approximate vertical view of row explanation.
Fig. 2 is the skeleton diagram illustrating one embodiment of the present invention.
Fig. 3 is the skeleton diagram illustrating another embodiment of the present invention.
Detailed description of the invention
A. the manufacture method of blooming
In the manufacture method of the blooming of the present invention, use and possess the multiple of the grasping mechanism as film
The tentering stretching device of fixture.The manufacture method of the present invention includes following operation: by this fixture to remove
Grip separation L1 sending direction grasps the edge, both sides (grasping operation) of the resin molding of long shape；On one side
By this resin molding in length direction conveyance while making the grip separation of width reduce extremely from W1
W2, and make this resin molding in width lax (lax operation)；And while by width side
Transport while the grip separation of conveyance direction is extended in length direction to this lax resin molding
L2, and this resin molding is stretched (stretching process) in length direction.In utilizing fixture grasping film
In tentering stretching device, in utilizing fixture to grasp resin molding end with the state of the tension force before not applying stretching
Until applying during tension force to resin molding by heating or stretch behind portion, due in the face heated
Uneven or each fixture transports precision and applies stress to resin molding, it is believed that its result is, at the beginning of stretching
Beginning region produces bigger wrinkle or fracture in resin molding and causes fixture fault.In contrast, in this
In invention, resin molding is made to relax in width before stretching to length direction.Thereby, in length
Region before the stretching of direction forms resin molding in the relaxation area that width is lax, and can avoid in
The stenter entrance area resin molding of grasping resin molding produces excessive tension force, therefore can suppress fixture event
The generation of barrier.
In the manufacture method of the present invention, spendable resin molding can be to have thermoplastic resin base material and shape
Become the duplexer of the unilateral resin bed of this thermoplastic resin base material, also can be to comprise single film
Individual layers.As long as manufactured blooming can be by comprising above-mentioned grasping operation, lax operation and stretching
The manufacture method of operation manufactures, then can be the most suitable blooming.The thickness of blooming is preferred
It is below 110 μm, below preferably 80 μm, below more preferably 70 μm, and then is preferably
Below 60 μm.On the other hand, the thickness of blooming is preferably more than 10 μm, more preferably 20 μm
Above.
Concrete example as manufactured blooming, it is preferable to illustrate polarizing coating, optical compensation films etc..
Tentering stretching device used in manufacture method as the present invention, such as, can use as drop-down
Stretching device, this stretching device includes: have track space from the tapered portion reduced continuously and track space
From the pair of tracks of certain line part and grip separation can be changed while dividing a word with a hyphen at the end of a line on each track
Multiple fixtures.According to this kind of stretching device, by the edge, both sides grasping resin molding with fixture
State under, change grip separation (spacing jig on same track from) and the width of conveyance direction
The grip separation in direction (the different spacing jigs on track from), and resin molding can be carried out to length
The stretching (MD stretching) in direction and to lax (TD relaxes) of width.
Fig. 1 be an example of the spendable stretching device of the manufacture method to the present invention be monolithically fabricated into
The approximate vertical view of row explanation.While with reference to Fig. 1, spendable to the manufacture method of the present invention
Stretching device illustrates.About stretching device 100, under overlooking in the left and right sides symmetrically
There is circular orbit 10L and circular orbit 10R.Furthermore, in this specification, from resin molding
Entrance side is observed, and the circular orbit in left side is referred to as the circular orbit 10L in left side, by the annular on right side
Track is referred to as the circular orbit 10R on right side.It is respectively configured on circular orbit 10L, 10R of left and right
There are multiple fixtures 20 that resin molding grasps.Fixture 20 is guided by each track and the most touring
Mobile.The most touring movement of fixture 20 on the circular orbit 10L in left side, right side
The most touring movement of fixture 20 on circular orbit 10R.In stretching device, from tree
Adipose membrane move into side towards taking out of side, be sequentially provided with grip areas A, TD relaxation area B, MD
Stretch zones C and releasing region D.Furthermore, these each regions mean substantially to carry out resin molding
Grasping, TD lax (or TD is lax and MD stretching), MD stretching and the region released, and
Be not meant as mechanically, independent in structure interval.It addition, should be noted in the stretching device of Fig. 1
The ratio of the length in each region is different from the ratio of actual length.
In grip areas A, circular orbit 10R, 10L of left and right is considered track space from necessarily
Line part.For representativeness, circular orbit 10R, 10L of left and right are constituted in the following manner:
To correspond to become the track space of the original width of the resin molding processing object from being generally parallel to each other.
In TD relaxation area B, circular orbit 10R, 10L of left and right is considered track space from continuously
The tapered portion reduced.For representativeness, circular orbit 10R, 10L of left and right are considered following structure
Become: along with advancing from grip areas A lateral MD stretch zones C side, track space is from leisure
Till reducing the width after lax corresponding to above-mentioned resin molding.In MD stretch zones C and
Releasing in the D of region, circular orbit 10R, 10L of left and right is considered track space from certain straight line
Portion, for representativeness, is constituted in the following manner: with the width after lax corresponding to above-mentioned resin molding
The track space of degree is from being generally parallel to each other.
Fixture (fixture in left side) 20 on the circular orbit 10L in left side and the circular orbit on right side
Fixture (fixture on right side) 20 on 10R can the most touring movement.Such as, left side
The driving of circular orbit 10L with sprocket wheel 30a, 30b by electro-motor 40a, 40b along counterclockwise
Direction rotates driving, and driving sprocket wheel 30a, 30b of the circular orbit 10R on right side passes through electronic horse
Reach 40a, 40b and be rotated in a clockwise direction driving.Its result is, drives use to being sticked in these
The fixture of the driving rolls (non-icon) of sprocket wheel 30a, 30b holds component (not shown) and provides shifting
Row power.Thereby, the most touring movement of fixture 20 in left side, the fixture 20 on right side is along suitable
The touring movement of clockwise.By the electro-motor on the electro-motor on the left of making and right side separately
Drive, fixture 20 and the most touring movement of fixture 20 on right side in left side can be made.
Grip size is preferably 12mm～40mm, more preferably 15mm～35mm.In fixture
When size does not reaches the situation of 12mm, exist and tensile stress cannot be kept to rupture, or due to folder
The intensity of tool conveying unit is not enough and produces and drives abnormal situation.If grip size is more than 40mm,
Then it is present in region non-stretched near fixture to become big and produce the inequality of end, or owing to grabbing non-
The situation holding portion's local elongation and rupture in the generation of the surface of resin molding.Furthermore, so-called grip size,
Mean the width of grip areas.
And then, the fixture 20 in left side and the fixture 20 on right side are respectively variable spacing type.That is, left and right
Fixture 20,20 independently, and can be along with movement, the grip separation (fixture of conveyance direction
Spacing) change.The fixture of variable spacing type can pass through pantogragh mechanism (such as, Japan Patent
Composition described in JP 2008-23775 publication) etc. the most suitable composition and realize.
In time using the situation of stretching device as illustrated in Figure 1, the manufacture method of the present invention can include
Following operation: in grip areas A, grasps tree by fixture with grip separation L1 of conveyance direction
The edge, both sides (grasping operation) of adipose membrane；Resin molding is made to be made the fixture of width by tapered portion
It is spaced and reduces to W2 from W1, thereby make resin molding in width lax (lax operation)；One
While make resin molding by line part while the grip separation of conveyance direction is extended to L2, and by resin
Film stretches (MD stretching process) in length direction.Also can optionally and then include following operation: will
The fixture of grasping resin molding is released (releasing operation).Fig. 2 and Fig. 3 is respectively comprising these
The skeleton diagram that one example of the manufacture method of the present invention of operation illustrates.Hereinafter, with reference to these
Figure, illustrates in more detail to each operation.
First, in grasping operation (grip areas A), by the fixture 20 of left and right, with necessarily
(grip separation) L1 grasping of grasping interval be loaded to the both side edges of resin molding 50 of stretching device
Portion, the movement of each fixture 20 by being guided by the circular orbit of left and right, and by this resin molding 50
Transport to TD relaxation area B.Grasping interval (the folder of the edge, both sides in grip areas A
Tool interval) for representativeness, it is considered the most equal interval.L1 can be such as 30mm～
200mm.Furthermore, so-called grip separation, for distance in the heart in adjoining clips.
As the resin molding grasped by fixture, the purposes of visual manufactured blooming etc. and select arbitrarily
Suitable film.When the situation that manufactured blooming is polarizing coating, as an example, will have heat
The stacking of plastic resin base material and the unilateral PVA resin being formed at this thermoplastic resin base material
Body grasps as resin molding.Hereinafter, for this duplexer, distinctive feature, condition etc. are entered
Row explanation, thereafter, illustrates the operation that lax operation is later.For the work that lax operation is later
Sequence, no matter being duplexer, or common resin molding (single film), all can apply identical behaviour
Work, condition etc..
Above-mentioned duplexer is made by forming PVA resin on the thermoplastic resin base material of long shape
Make.As long as thermoplastic resin base material can support PVA resin (polarizing coating obtained) from unilateral,
Then can be set to the most suitable composition.
As the formation material of thermoplastic resin base material, include, for example: polyethylene terephthalate
Be the olefin-based resins such as ester system resin, cyclic olefine resin, polypropylene such as resin, polyamide series resin,
Polycarbonate-based resin, their copolymer resin etc..In these, preferably cyclic olefine resin (example
Such as, norbornene resin), amorphous polyethylene terephthalate system resin.As amorphous
The concrete example of the polyethylene terephthalate system resin of matter, can enumerate: and then comprise M-phthalic acid
As the copolymer of dicarboxylic acids or and then comprise the cyclohexanedimethanol copolymer as glycol.
About the draft temperature of thermoplastic resin base material, the formation material of visual thermoplastic resin base material,
Stretching mode etc. and be set as the most suitable value.About draft temperature, for representativeness, for
More than the glass transition temperature (Tg) of thermoplastic resin base material, preferably more than Tg+10 DEG C,
And then preferably Tg+15 DEG C～Tg+30 DEG C.In using dry type stretching mode or wet tensile mode
As stretching mode, and use amorphous polyethylene terephthalate system resin as thermoplastic resin
Aliphatic radical material formed material situation time, draft temperature can be made to be less than the vitrification of thermoplastic resin base material
Transition temperature (such as, 60 DEG C～100 DEG C).
In advance thermoplastic resin base material can be implemented surface modification treatment (such as, sided corona treatment etc.),
Also easy adhesive linkage can be formed on thermoplastic resin base material.By carrying out above-mentioned process, thermoplastic can be improved
Property resin base material and PVA resin adhesion.Furthermore, surface modification treatment and/or the most bonding
The formation of layer can be carried out before above-mentioned stretching, also can carry out after above-mentioned stretching.
The forming method of above-mentioned PVA resin can use the most suitable method.Be preferably in
Implement the coating fluid that on the thermoplastic resin base material that overstretching processes, coating comprises PVA system resin to go forward side by side
Row is dried, and thereby forms PVA resin.
As above-mentioned PVA system resin, the most suitable resin can be used.Include, for example: poly-second
Enol, ethylene-vinyl alcohol copolymer.Polyvinyl alcohol can obtain by making saponifying polyvinyl acetate.
Ethylene-vinyl alcohol copolymer can obtain by making vinyl-vinyl acetate copolymer saponification.PVA system
The saponification degree of resin is usually 85 moles of %～100 moles of %, preferably 95.0 moles %～99.95
Mole %, and then preferably 99.0 moles %～99.93 moles of %.Saponification degree can be according to JIS K
6726-1994 and obtain.By using the PVA system resin of above-mentioned saponification degree, durability can be obtained
Excellent polarizing coating.When the situation that saponification degree is too high, there is the easy gelation of coating fluid, and become difficult
To form uniform coated film probability.
The visual purpose of average degree of polymerization of PVA system resin and properly select.Average degree of polymerization is usual
It is 1000～10000, preferably 1200～4500, and then preferably 1500～4300.Furthermore,
Average degree of polymerization can be obtained according to JIS K 6726-1994.
Above-mentioned coating fluid, for representativeness, forms for making above-mentioned PVA system resin be dissolved in solvent
Solution.As solvent, include, for example: water, dimethyl sulfoxide, dimethylformamide, diformazan
The polyalcohols such as yl acetamide, N-methylpyrrole pyridine ketone, various glycols, trimethylolpropane,
The amine such as ethylenediamine, diethylenetriamines.They can be used alone, or is used in combination of two or more.
In these, preferably water.The PVA system resin concentration of solution is relative to solvent 100 weight portion, excellent
Elect 3 weight portions～20 weight portions as.If above-mentioned resin concentration, then can be formed and be close contact in thermoplasticity
The uniform coated film of resin base material.
Also additive can be coordinated to coating fluid.As additive, include, for example: plasticizer, surface
Activating agent etc..As plasticizer, include, for example: the polyhydric alcohol such as ethylene glycol or glycerol.As surface
Activating agent, include, for example: nonionic surfactant.These can improve further and to be obtained
Use for the purpose of the uniformity of PVA resin or dyeability, draftability.
As the coating process of coating fluid, the most suitable method can be used.Include, for example: roller
Coating, method of spin coating, bar rubbing method, Dipcoat method, mould mouth rubbing method, curtain type are coated with
Method, spraying process, knife coating (funny point-type scraper for coating method etc.) etc..
Above-mentioned baking temperature is preferably the glass transition temperature (Tg) of thermoplastic resin base material below,
And then preferably less than Tg-20 DEG C.By being dried with said temperature, can prevent terminating in formation PVA
Before resin, thermoplastic resin base material deforms, thus can prevent obtained PVA system resin
The orientation of layer is deteriorated.So, thermoplastic resin base material can together with PVA resin well
Deformation, thus the lax of following duplexer and stretching can be carried out well.Its result is, can be to
PVA resin gives good orientation, thus can obtain and have the inclined of excellent optical characteristics
Vibrating diaphragm.Herein, so-called " orientation ", it is intended that the orientation of the strand of PVA resin.
Then, in lax operation (TD relaxation area B), by grasped by the fixture 20 of left and right
Resin molding 50 is while transporting while relaxing in width in length direction.In TD relaxation area B
In, circular orbit 10R, 10L of left and right is considered the track space tapered portion from minimizing continuously, because of
The grip separation of width is reduced to W2 from W1 by this by by this region, thereby, enters
Row resin molding 50 relaxing to width.Slack can be by entering the variable quantity of track spacing
Row sum-equal matrix and control.Specifically, outlet (the MD stretch zones C side of TD relaxation area B
Portion) track space at place is from the entrance (grip areas A side end) relative to TD relaxation area B
Place track space from ratio the least, more can obtain bigger slack.Furthermore, in this specification,
So-called " making resin molding relax in width ", it is intended that formed in resin molding and relax in width
The region of (in other words, be not affected by tension force), in an embodiment, can make resin molding to width side
To shrinking.
In the embodiment illustrated in Fig. 2, in lax operation, only carry out resin molding 50 to width
Relaxing of degree direction.When this situation, in the state of the grip separation (L1) maintaining conveyance direction
Under make resin molding 50 by TD relaxation area B.On the other hand, in the embodiment party illustrated in Fig. 3
In formula, in lax operation, carry out resin molding 50 to the lax of width and to length direction
Stretching.When this situation, making resin molding 50 by TD relaxation area B, one side is the most at leisure
Increase the fixture 20 translational speed to conveyance direction and the grip separation of conveyance direction is expanded from L1
To L1'.By carrying out MD stretching with the multistage in lax operation with stretching process, can make final
Stretching ratio uprises.It addition, by carrying out to the lax of width and drawing to length direction simultaneously
Stretch, can avoid excessive lax, therefore can obtain the generation etc. that can suppress to result from lax wrinkle
Effect.
The visual MD stretching ratio of minimizing multiplying power B (B=W2/W1) of the grip separation of width
Deng and be set as the most suitable value.Reduce multiplying power B and be preferably 0.60～0.99, more preferably
0.65～0.90, and then preferably 0.70～0.80.If this kind reduces multiplying power, then can be suitable for DIYU
The width of resin molding forms relaxation area.It addition, in the manufacture of polarizing coating, can obtain more excellent
Different optical characteristics.Furthermore, the grip separation of width may correspond to by the fixture grasping of left and right
The width of the resin molding of part.
In lax operation comprises the embodiment (embodiment illustrated in Fig. 3) of MD stretching,
Preferably: with become compared with free end when length direction carries out the situation of uniaxial tension to width
The mode of the big shrinkage factor of shrinkage factor reduce the grip separation of width.Specifically, preferably to
The stretching ratio a (a=L1'/L1) of length direction and minimizing multiplying power B of the grip separation of width
MeetRelation.In time meeting the situation of above-mentioned relation, regardless of drawing to length direction
Stretching, the width that can be suitable for DIYU resin molding forms relaxation area.To the stretching ratio of length direction
A is preferably 1.0 times～5.5 times, more preferably 1.1 times～4.0 times.
About the temperature (lax temperature) of the resin molding in lax operation, the formation material of visual resin molding
Expect to wait and be set as the most suitable value.Lax about duplexer when manufacturing the situation of polarizing coating
Temperature, for representativeness, more than the glass transition temperature (Tg) of thermoplastic resin base material,
The preferably glass transition temperature (Tg) of thermoplastic resin base material more than+10 DEG C, and then preferably
For more than Tg+15 DEG C.On the other hand, the lax temperature of duplexer is preferably less than 170 DEG C.
Then, in stretching process (MD stretch zones C), will be grasped by the fixture 20 of left and right
Resin molding 50 while in length direction conveyance on one side in length direction stretching.The stretching of resin molding 50
Carry out in the following way: make fixture 20 increase at leisure to the translational speed of conveyance direction, will remove
The grip separation sending direction is extended to L2.By adjusting the conveyance of the porch of MD stretch zones C
The conveyance direction in the grip separation (L1 or L1') in direction and the exit of MD stretch zones C
Grip separation (L2), can control stretching ratio and (not comprise the situation of MD stretching in lax operation
Time be L2/L1, in lax operation comprise MD stretching situation time be L2/L1').Furthermore, also may be used
In stretching process, carry out the contraction to width simultaneously.Carry out to width in stretching process simultaneously
During the situation of contraction in degree direction, as long as arranging the circular orbit of left and right in MD stretch zones C
The track space of 10R, 10L is from the tapered portion reduced continuously.By the interorbital about adjusting
The decrement of distance, can control the shrinkage factor of width.
Total stretching ratio (stretching ratio in stretching process and pine about the resin molding after stretching process
The product of the stretching ratio in relaxation operation, L2/L1), relative to the script length of resin molding, preferably
It is more than 2.0 times, more preferably 2.0 times～6.5 times.
The forming material etc. and be set as the most suitable value of the visual resin molding of draft temperature.About system
Make the draft temperature during situation of polarizing coating, for representativeness, for the glass of thermoplastic resin base material
Change more than transition temperature (Tg), the preferably glass transition temperature (Tg) of thermoplastic resin base material
More than+10 DEG C, and then preferably more than Tg+15 DEG C.On the other hand, draft temperature is preferably 170 DEG C
Below.By stretching under said temperature, the crystallization of PVA system resin can be suppressed to enter rapidly
Exhibition, thus the exception that suppression is caused by this crystallization (such as, hinders the PVA system tree of utilization stretching
The orientation of lipid layer).
Finally, in releasing in operation (releasing region D), the fixture 20 of grasping resin molding 50 is released.
In releasing in operation, for representativeness, it is believed that spacing jig from and grip separation the most certain.Depending on needing
Want, resin molding 50 is cooled to required temperature (preferably glass transition temperature (Tg) is below)
Rear releasing fixture.
The manufacture method of the blooming of the present invention is than that described above, it may include other operations.As manufacture
Polarizing coating, as other operations during situation of blooming, include, for example: insoluble operation, dyeing
Operation, the cross-linking process step stretching process different from above-mentioned stretching, matting, it is dried (moisture content
Regulation) operation etc..Other operations can be carried out in the most suitable time point.
About above-mentioned dyeing process, for representativeness, for utilizing dichroic substance to PVA system tree
Lipid layer carries out the operation dyeed.Preferably by making PVA resin absorption dichroic substance carry out.
As this adsorption method, include, for example: make PVA resin (duplexer) impregnated in and comprise
Method in the dyeing liquor of dichroic substance；The method that dyeing liquor is coated PVA resin；
Method etc. to PVA resin spray dyeing liquid.Preferably make duplexer impregnated in and comprise two colors
Method in the dyeing liquor of property material.Its reason is: can adsorb dichroic substance well.Can make
Duplexer two sides impregnated in dyeing liquor, also can only make duplexer single-side impregnated in dyeing liquor.Furthermore,
In dyeing process and/or following cross-linking process step, also can stretch simultaneously.
As above-mentioned dichroic substance, include, for example: iodine, organic dyestuff.These can be used alone,
Or it is used in combination of two or more.Dichroic substance is preferably iodine.In using iodine as dichroic substance
Situation time, above-mentioned dyeing liquor is preferably iodine aqueous solution.About the use level of iodine, relative to water 100
Weight portion, preferably 0.1 weight portion～1.0 weight portions.In order to improve the iodine dissolubility to water, excellent
Select cooperation iodide salt in iodine aqueous solution.As iodide salt, include, for example: potassium iodide, iodine
Change lithium, sodium iodide, zinc iodide, silver iodide, lead iodide, Copper diiodide, barium iodide, calcium iodide, iodine
Change stannum, titanium iodide etc..In these, preferably potassium iodide, sodium iodide.Cooperation about iodide salt
Amount, relative to water 100 weight portion, preferably 0.3 weight portion～15 weight portions.
The liquid temperature during dyeing of dyeing liquor is preferably 20 DEG C～40 DEG C.Impregnate in making PVA resin
During situation in dyeing liquor, dip time is preferably 5 seconds～300 seconds.If above-mentioned condition, then
PVA resin can be made fully to adsorb dichroic substance.
About above-mentioned insoluble operation and cross-linking process step, for representativeness, by making PVA system tree
Lipid layer impregnated in boric acid aqueous solution and carries out.About above-mentioned matting, for representativeness, it is
Carry out by making PVA resin impregnated in potassium iodide aqueous solution.In above-mentioned drying process
Baking temperature is preferably 30 DEG C～100 DEG C.
B. polarizing coating
The polarizing coating made by above-mentioned manufacture method is essentially gas absorption quantity dichroic substance
PVA resin film.Polarizing coating preferably shows with the arbitrary wavelength in wavelength 380nm～780nm
Show absorption dichromatic.
The using method of polarizing coating can use the most suitable method.Specifically, can be with above-mentioned
The state that thermoplastic resin base material is integrally forming uses, and also can be transferred to other from thermoplastic resin base material
Component (thermoplastic resin base material is peeled off) and use.
About the polarizing coating made by above-mentioned manufacture method, its shrinkage stress is less, is i.e. easy to height
Under temperature environment, dimensional stability also can be excellent.It addition, be polarization when 42% in monomer absorbance
Degree is preferably more than 99.99%.As above can optical characteristics excellence.
Embodiment
Hereinafter, by embodiment, the present invention is specifically illustrated, but the present invention is not by these
Embodiment restriction person.
[embodiment 1]
<making of duplexer>
Preparation amorphism PET base material (100 μ m-thick) is as thermoplastic resin base material, in this amorphous
Property PET base material coating PVA aqueous solution, be dried at a temperature of 50 DEG C～60 DEG C.Thereby,
In amorphism PET base material, the PVA layer of 14 μ m-thick is filmed, and making layer stack.
<TD is lax and MD stretches>
Use stretching device as shown in Figure 1, the duplexer obtained is relaxed in width, continues
And stretch in length direction.Specifically, in grip areas A, with grip separation L1:40mm
Grasp the edge, both sides of duplexer and transport, in TD relaxation area B, in 100 DEG C in length direction
Under make the grip separation of width reduce layer to 680mm (W2) from 800mm (W1)
Stack carries out shrinking (grip separation L1':40 in the exit of TD relaxation area B to width
mm).Then, in MD stretch zones C, at 120 DEG C, duplexer is empty to length direction
In be stretched to 3 times of (grip separation L2:120mm in the exit of MD stretch zones C, width
Grip separation W3:680mm in direction).Thereafter, in releasing in the D of region, grasping layer is released
The fixture of stack.
During TD is lax to the stretching ratio a (a=L1'/L1) of length direction be 1, width
Minimizing multiplying power B (B=W2/W1) of grip separation be 0.85, and meetRelation.
During and MD lax in TD stretches, do not occur to clamp fault.
<dyeing process>
Then, the iodine aqueous solution (iodine concentration: 0.5 weight %, iodate that duplexer impregnated in 25 DEG C is made
Potassium concn: 10 weight %) in 30 seconds.
<crosslinking Treatment>
Make boric acid aqueous solution that the duplexer after dyeing impregnated in 60 DEG C (boric acid concentration: 5 weight %,
Potassium iodide concentration: 5 weight %) in 60 seconds, meanwhile, be stretched to 1.6 to MD direction
Again (total stretching ratio: 5 times).
<cleaning treatment>
After crosslinking Treatment, make potassium iodide aqueous solution (the potassium iodide concentration: 5 that duplexer impregnated in 25 DEG C
Weight %) in 5 seconds.
In the above described manner, on thermoplastic resin base material, make the polarizing coating of thickness 3.5 μm.
[embodiment 2]
Carry out TD in the following manner to relax and MD stretching, in addition, with same as in Example 1
Mode carry out, and on resin base material make thickness 3.5 μm polarizing coating.
<TD is lax and MD stretches>
Use stretching device as shown in Figure 1, the duplexer obtained is relaxed in width, continues
And stretch to length direction.Specifically, in grip areas A, with grip separation L1:40mm
Grasp the edge, both sides of duplexer and transport, in TD relaxation area B, in 100 DEG C in length direction
Under make the grip separation of width reduce layer to 680mm (W2) from 800mm (W1)
Stack is shunk to width.Simultaneously in TD relaxation area B, grip separation is made to increase to
L1':45mm and in length direction stretch.Then, in MD stretch zones C, in 120 DEG C
Lower duplexer is stretched in the air to length direction 3 times of (folders in the exit of MD stretch zones C
Tool interval L2:120mm, grip separation W3:680mm of width).Thereafter, Yu Xie
Except, in the D of region, releasing the fixture of grasping duplexer.That is, enter in TD relaxation area B simultaneously
Row MD stretches, and in addition, carries out TD in the same manner as example 1 and relaxes and MD
Stretching.
During TD is lax to the stretching ratio a (a=L1'/L1) of length direction be 1.125, thereforeBeing 0.943, minimizing multiplying power B (B=W2/W1) of the grip separation of width is 0.85,
And meetRelation.
During and MD lax in TD stretches, do not occur to clamp fault.
[embodiment 3]
Carry out TD in the following manner to relax and MD stretching, in addition, with same as in Example 1
Mode carry out, and on resin base material make thickness 3.5 μm polarizing coating.
<TD is lax and MD stretches>
Use stretching device as shown in Figure 1, the duplexer obtained is relaxed in width, continues
And stretch to length direction.Specifically, in grip areas A, with grip separation L1:40mm
Grasp the edge, both sides of duplexer and transport, in TD relaxation area B, in 100 DEG C in length direction
Under make the grip separation of width reduce layer to 680mm (W2) from 800mm (W1)
Stack is shunk to width.Simultaneously in TD relaxation area B, grip separation is made to increase to
L1':45mm and in length direction stretch.Then, in MD stretch zones C, in 120 DEG C
Lower duplexer is stretched in the air to length direction 3 times of (folders in the exit of MD stretch zones C
Tool interval L2:120mm).Simultaneously in stretch zones C, make the grip separation of width certainly
Duplexer is shunk to width by 680mm (W2) minimizing to 560mm (W3).
Thereafter, in releasing in the D of region, the fixture of grasping duplexer is released.That is, in TD relaxation area B
The middle contraction carrying out MD stretching simultaneously, and carrying out width in MD stretch zones C simultaneously,
In addition, carry out TD in the same manner as example 1 to relax and MD stretching.
During TD is lax to the stretching ratio a (a=L1'/L1) of length direction be 1.125, thereforeBeing 0.943, minimizing multiplying power B (B=W2/W1) of the grip separation of width is 0.85,
And meetRelation.
During and MD lax in TD stretches, do not occur to clamp fault.
[embodiment 4]
Carry out TD in the following manner to relax and MD stretching, in addition, with same as in Example 1
Mode carry out, and on resin base material make thickness 3.5 μm polarizing coating.
<TD is lax and MD stretches>
Use stretching device as shown in Figure 1, the duplexer obtained is relaxed in width, continues
And stretch to length direction.Specifically, in grip areas A, with grip separation L1:40mm
Grasp the edge, both sides of duplexer and transport, in TD relaxation area B, in 100 DEG C in length direction
Under make the grip separation of width reduce layer to 680mm (W2) from 800mm (W1)
Stack is shunk to width.Simultaneously in TD relaxation area B, grip separation is made to increase to
L1':60mm and in length direction stretch.Then, in MD stretch zones C, in 120 DEG C
Lower duplexer is stretched in the air to length direction 3 times of (folders in the exit of MD stretch zones C
Tool interval L2:120mm).Simultaneously in stretch zones C, make the grip separation of width certainly
Duplexer is shunk to width by 680mm (W2) minimizing to 560mm (W3).
Thereafter, in releasing in the D of region, the fixture of grasping duplexer is released.That is, by TD relaxation area B
In MD stretching ratio be set to 1.5 times, in addition, carry out in the way of same as in Example 3
TD is lax and MD stretches.
During TD is lax to the stretching ratio a (a=L1'/L1) of length direction be 1.5, therefore
Being 0.816, minimizing multiplying power B (B=W2/W1) of the grip separation of width is 0.85, and
Not metRelation.
During and MD lax in TD stretches, manifest some wrinkles in duplexer, but clamp
Fault, and do not produce problem in practical use.
[comparative example 1]
Carry out MD stretching in the following manner and TD shrinks, in addition, with same as in Example 1
Mode carry out, and on resin base material make thickness 3.5 μm polarizing coating.
<MD stretching and TD shrink>
First the duplexer obtained is stretched in length direction, then stretch one in length direction
While shrink to width.Specifically, initially layer is grasped with grip separation L1:40mm
The edge, both sides of stack also transports, then, by width at 100 DEG C in length direction
Grip separation be maintained 800mm (W1) while grip separation is increased to L1':70mm and in
Length direction stretches.Then, make the grip separation of width from 800mm (W2 at 120 DEG C
=W1) reduce and to 560mm (W3), duplexer shunk to width, simultaneously to
Length direction is stretched to 3 times (grip separation L2:120mm in the exit of stretch zones) in the air.
Thereafter, in releasing in the D of region, the fixture of grasping duplexer is released.
In MD stretching and TD are shunk, there occurs clamping fault.
[evaluation]
If embodiment 1～4 is compared with comparative example 1, then can be clear and definite, by length side
Make resin molding relax in width before stretching, can suppress to clamp the generation of fault.If by embodiment
3 compare with embodiment 4, then can be clear and definite, by the drawing to length direction in being relaxed by TD
The minimizing multiplying power of the grip separation stretching multiplying power and width controls to be specific relation, suppresses further
The generation of wrinkle etc., understands as result, can suppress to clamp the generation of fault further.
[industrial applicability]
The manufacture method of the present invention can be preferably used as the system of the blooming such as polarizing coating, optical compensation films
Make.
Symbol description
10 tracks
20 fixtures
50 duplexers (resin molding)
100 stretching devices
Claims (6)
1. a manufacture method for blooming, use tentering stretching device manufacture blooming, described in draw
Width stretching device possesses the multiple fixtures as grasping mechanism,
The manufacture method of described blooming includes following operation:
Grasping operation, grasps long shape by the way of this fixture is with the grip separation of conveyance direction as L1
The edge, both sides of resin molding；
Lax operation, transports this resin molding while making between the fixture of width in length direction
Every reducing to W2 from W1, so that this resin molding relaxes in width；And
Stretching process, will transport in length direction in this resin molding that width is lax, one
While the grip separation of conveyance direction to be extended to L2, thus this resin molding is stretched in length direction.
The most the method for claim 1, wherein
It is more than 2.0, wherein, A=L2/L1 to total stretching ratio A of length direction.
The most the method for claim 1, wherein
Minimizing multiplying power B of the grip separation of width is 0.60～0.99, wherein, B=W2/W1.
The most the method for claim 1, wherein
Described lax operation includes: by the folder of conveyance direction while the grip separation of minimizing width
Tool interval is extended to L1 ', thus is stretched in length direction by described resin molding,
Minimizing multiplying power B to the stretching ratio a of length direction with the grip separation of width meetsRelation, wherein, a=L1 '/L1, B=W2/W1.
The most the method for claim 1, wherein
The thickness of manufactured blooming is below 110 μm.
The most the method for claim 1, wherein
Manufactured blooming is polarizing coating.
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| CN202211235892.4A CN115464864A (en) | 2015-01-14 | 2015-11-24 | Method for manufacturing optical film |
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| JP2015004738A JP6579752B2 (en) | 2015-01-14 | 2015-01-14 | Manufacturing method of optical film |
| JP2015-004738 | 2015-03-04 | ||
| PCT/JP2015/082871 WO2016114004A1 (en) | 2015-01-14 | 2015-11-24 | Optical film manufacturing method |
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| JP (1) | JP6579752B2 (en) |
| KR (2) | KR102323034B1 (en) |
| CN (2) | CN105980133A (en) |
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| CN113580456A (en) * | 2021-08-11 | 2021-11-02 | 浙江格尔泰斯环保特材科技股份有限公司 | Preparation method of polytetrafluoroethylene microporous film |
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| US11597198B2 (en) * | 2020-10-05 | 2023-03-07 | Meta Platforms Technologies, Llc | Methods of manufacturing optically anisotropic polymer thin films |
| KR20220128310A (en) | 2021-03-12 | 2022-09-20 | 주식회사 엘지에너지솔루션 | Busbar assembly, battery pack comprising the busbar assembly and vehicle comprising the battery pack |
| US20230113884A1 (en) | 2021-10-12 | 2023-04-13 | Lg Energy Solution, Ltd. | Battery pack and vehicle including the same |
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| Publication number | Publication date |
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| CN115464864A (en) | 2022-12-13 |
| JP6579752B2 (en) | 2019-09-25 |
| JP2016129963A (en) | 2016-07-21 |
| WO2016114004A1 (en) | 2016-07-21 |
| TW201632923A (en) | 2016-09-16 |
| KR102323034B1 (en) | 2021-11-05 |
| KR20170104367A (en) | 2017-09-15 |
| KR20210135352A (en) | 2021-11-12 |
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