CN103718071A - Process film manufacturing method and manufacturing device - Google Patents
Process film manufacturing method and manufacturing device Download PDFInfo
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- CN103718071A CN103718071A CN201280037140.5A CN201280037140A CN103718071A CN 103718071 A CN103718071 A CN 103718071A CN 201280037140 A CN201280037140 A CN 201280037140A CN 103718071 A CN103718071 A CN 103718071A
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- Prior art keywords
- niproll
- deflector roll
- roller
- processing film
- treatment trough
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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
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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
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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
- B29K2029/00—Use of polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals or derivatives thereof as moulding material
- B29K2029/04—PVOH, i.e. polyvinyl alcohol
Abstract
This process film manufacturing method comprises at least a resin film process step, further comprising a step of, after the process film is conveyed from within a processing tank, conveying the process film via a nip roller formed from a first roller and a second roller and a guard roller which is positioned following the nip roller. The guard roller is an upper guard roller which is positioned such that the top part of the guard roller is higher than the top part of the second nip roller in the nip roller. The process film which is obtained by the method is capable of minimizing occurrences of scratches, dents, etc.
Description
Technical field
The present invention relates to be manufactured by resin molding method and the manufacturing installation thereof of the processing film of this resin molding.As resin molding, can suitably select the film using in various fields according to processing object.Particularly there are not the various processing films of fine scar in film, during the manufacture of for example polaroid requiring to process, as resin molding, can use such as polyvinyl alcohol mesentery etc., at least arbitrary treatment process in the swelling operation in the manufacturing process of polaroid, dyeing process, crosslinked operation, stretching process, washing procedure, can apply the present invention.
In addition, as resin molding, also can use cellulose esters is the various bloomings such as transparent protective film that the polaroids such as resin are used, and at least arbitrary treatment process in saponifying process, water washing operation are thereafter processed, can apply the present invention.The blooming that comprises polaroid etc. can be used in the image display devices such as liquid crystal indicator, electroluminescence (EL) display device, plasma scope (PD) and Field Emission Display (FED:Field Emission Display).
Background technology
In image display device (particularly liquid crystal indicator), use the bloomings such as polaroid.Conventionally, described polaroid is by making the dyeing of polyvinyl alcohol (PVA) (PVA) film, uniaxial tension.If by PVA mesentery uniaxial tension, absorption (dyeing) is orientated in the dichroic substance of PVA molecule, therefore becomes polaroid.
In order to obtain such polaroid, many methods have been proposed up to now.For example, as the manufacture method of polaroid, proposed following scheme, that is, made non-oriented PVA film after swelling, make iodine or dichroic dye absorption in swelling is bathed, then implement to be cross-linked in containing boron aqueous acid, stretching etc. processed (patent documentation 1,2).
Prior art document
Patent documentation
Patent documentation 1: Japanese kokai publication hei 10 ?No. 153709 communiques
Patent documentation 2: TOHKEMY 2004 ?No. 341515 communiques
Summary of the invention
Invent problem to be solved
In recent years, the high performance development of liquid crystal indicator, and require high visual.Therewith together, for polarization plates, it is well very important making visuality have high-transmission rate, visuality.Therefore,, for polarization plates, require polaroid and transparent protective film thereof all not to hinder visuality.In addition, if there is scraping, cut (some scar) in polarization plates, in goods inspection, become unacceptable product, the decrease in yield of goods, this aspect is not preferred yet.In addition; polarization plates is the duplexer of polaroid and transparent protective film; conventionally utilize tackifier etc. by polaroid and transparent protective film laminating, if but have scraping, cut on polaroid, its transparent protective film, the adaptation of the interlayer based on described tackifier etc. becomes bad.
For polarization plates, the reason declining as visuality, can enumerate the scraping in polaroid, its transparent protective film, the generation of cut.As mentioned above, polaroid by make PVA film etc. at the medium dipping of dyeing liquor, transport to manufacture, on the other hand, transparent protective film with polaroid laminating before, at saponification processing, water washing, in bathing, transport.Conventionally, in the situation that implementing these processing, follow the increase of speed of production, have the scraping producing, the tendency that cut also increases in above-mentioned processing.In addition, in the manufacture of polaroid, there is the problem that produces knick point (Network ニ ッ Network) (knick point defect).Knick point is the local concavo-convex defect that contacts with roller, rubs and produce due to PVA film surface.
The object of the present invention is to provide manufacture method and the manufacturing installation thereof of processing film, should process the manufacture method of film, it is manufactured the processing film of this resin molding by described resin molding, at least having limit makes the resin molding of long size shape contact to process with the treating fluid in treatment trough the treatment process that transport on limit, the manufacture method of this processing film can meet processes the desired characteristic of film, and reduces the generation etc. of scraping, cut.
In addition, the object of the invention is to, the generation etc. that can reduce scraping, cut and manufacture method and the manufacturing installation thereof that can reduce the processing film of knick point are provided.
For solving the method for problem
The inventor conducts in-depth research in order to solve described problem, found that, can realize described object, thereby complete the present invention by manufacture method and the manufacturing installation thereof of processing film shown below.
; the present invention relates to a kind of manufacture method of processing film; wherein by resin molding, manufactured the processing film of this resin molding; the manufacture method of this processing film at least has limit makes the described resin molding of long size shape contact to process with the treating fluid in treatment trough the treatment process that transport on limit; the manufacture method of described processing film is characterised in that
Described at least one, treatment process has: the described processing film obtaining by this treatment process is transported in described treatment trough, by by the first roller and second roller, (carriage direction of processing film of take is benchmark, upstream side is made as to the first roller, downstream is made as to second roller) niproll that forms and continue described niproll and operation that the deflector roll that configures transports
And described deflector roll is the top deflector roll that the top of this deflector roll is disposed at the position more closer to the top than the top of the second roller in described niproll.
Can be in the manufacture method of described processing film, described top deflector roll is provided with to the fluid supply unit of the surperficial feed flow of this top deflector roll.
Can be in the manufacture method of described processing film, described niproll and described top deflector roll configure as follows,, the direction of imaginary perpendicular line with respect to linking the imaginary line of the first roller of described niproll and each central point of second roller is made as to 0 °, this imagination perpendicular line, transports the formed angle of line with the imagination of the direction of the processing film that represents to transport by described niproll and described top deflector roll and be 0～be less than 90 °.
Can be in the manufacture method of described processing film, with respect to the niproll that described processing film is transported, in described treatment trough, dispose other the niproll that described resin molding is transported into described treatment trough, utilize the difference of these niprolls, limit is processed the resin molding of the long size shape limit that stretches in the longitudinal direction.
Suitable being applied to of manufacture method of described processing film, by implementing the situation that processing film that treatment process obtains is blooming to described resin molding.
With regard to the manufacture method of described processing film, described resin molding is polyvinyl alcohol mesentery, and the manufacture method of described processing film can be applied to manufacture the situation as processing the polaroid of film.In this case, described treatment process at least comprises swelling operation, dyeing process, crosslinked operation, stretching process and washing procedure, and at least one operation in swelling operation, dyeing process, crosslinked operation, stretching process and washing procedure, the operation that the top deflector roll that have resulting processing film is transported in described treatment trough, configures by described niproll and the described niproll that continues transports.
In addition, the present invention relates to a kind of manufacturing installation of processing film, it is characterized in that possessing at least one treatment trough, described treatment trough will fill up the treating fluid of processing arbitrarily for resin molding is carried out,
Described treatment trough has that (carriage direction of processing film of take is made as the first roller by upstream side as benchmark by the first roller and second roller, downstream is made as to second roller) niproll that forms and continue described niproll and the deflector roll that configures, described niproll and deflector roll transport for the processing film after this treatment trough is processed is transported in this treatment trough, and described deflector roll is the top deflector roll that the top of this deflector roll is disposed at the position more closer to the top than the top of the second roller in described niproll.
Can, in described manufacturing installation, have to the fluid supply unit of the surperficial feed flow of this top deflector roll.
Can be in described manufacturing installation, described niproll and described top deflector roll configure as follows,, the direction of imaginary perpendicular line with respect to linking the imaginary line of the first roller of described niproll and each central point of second roller is made as to 0 °, this imagination perpendicular line, transports the formed angle of line with the imagination of the direction of the processing film that represents to transport by described niproll and described top deflector roll and be 0～be less than 90 °.
Can be in described manufacturing installation, with respect to the niproll that described processing film is transported, in described treatment trough, dispose other the niproll that described resin molding is transported into described treatment trough.
Invention effect
Conventionally, for the processing film that the treatment process for example, contacting with treating fluid with regard to the resin molding (PVA mesentery) that makes by enforcement to be transported continuously obtains, transporting in thering is the treatment trough for the treatment of fluid, when removing liquid by niproll, transport.About processing the generation of scraping, cut on film, can think that fine foreign matter invades between this processing film and niproll together with fluid (treating fluid), and this foreign matter is held roller clamping, generation scraping thus, cut.
In manufacture method of the present invention, after described niproll, be also provided with, be arranged at the top deflector roll of the position closer to the top of described niproll.The top of described top deflector roll is disposed at the upside at top of the second roller in the downstream in described niproll.Like this, top deflector roll is set after described niproll, thus, by the processing film being transported between niproll, deflector roll above being directed in the situation that contacting with niproll hardly after between by niproll.Therefore can think, can suppress because foreign matter is held scraping, the cut that roller clamping produces.
In addition, in manufacture method of the present invention, after the processing film that is transported between niproll is between by niproll, contact with niproll hardly.Therefore can think, can suppress the knick point that contacts and rub and produce with niproll due to the processing film surface except after liquid.On the other hand, by the processing film utilization top deflector roll after niproll, transport, if but top deflector roll is dry, on the contrary likely owing to producing knick point with the friction of processing film.In manufacture method of the present invention, by the surperficial fluid supply unit to top deflector roll is set, thereby can make the surface of top deflector roll form thin liquid film.Consequently, think and can improve the drying regime of processing film, thereby more effectively suppress knick point.
By related manufacture method of the present invention, can be manufactured by PVA mesentery as resin molding processing film bloomings such as () polaroids of the inner evenness excellence of optical characteristics.
Accompanying drawing explanation
Fig. 1 means the schematic diagram of an embodiment in the manufacture method of processing film of the present invention, that treatment process is related.
Fig. 2 means the schematic diagram of a mode of the Angular correlation of in the manufacture method of processing film of the present invention, that treatment process is related and configuration niproll and top deflector roll.
Fig. 3 means the schematic diagram of the embodiment that the manufacture method of processing film of the present invention manufacture method related, polaroid is related.
Fig. 4 means the related schematic diagram of the manufacture method of processing film in the past manufacture method related, polaroid.
Embodiment
In the time of below with reference to accompanying drawing, the manufacture method of processing film of the present invention is described.Fig. 1 relates to the treatment process in the manufacture method of processing film of the present invention.Figure 1 illustrates an embodiment, this embodiment relate to the configuration of resin molding W, along continuous straight runs by pair of first rolls R1 and second roller R2(take process film carriage direction as benchmark is made as the first roller R1 by upstream side, downstream is made as to second roller R2) niproll R1, R2, the top deflector roll G forming and the treatment trough Y with treating fluid X.The processing film W ' transporting from treatment trough Y removes liquid by niproll R1, R2.In Fig. 1, the resin molding W that is transported into treatment trough Y transports in treating fluid X by two deflector roll g.The radical of deflector roll g in treating fluid X, configuration can suitably be determined.It should be noted that, final deflector roll g in treating fluid X and the configuration relation of niproll R1, R2 are not particularly limited, from making the treating fluid X scraping from the surface of processing film W ' by removing liquid, the viewpoint that foreign matter falls smoothly, preferably configure in the following manner final deflector roll g,, as shown in Figure 1, the processing film transporting from final deflector roll g is transported towards niproll R1, R2 in vertical direction.
Related the first roller R1 and the second roller R2 of niproll is configured as shown in Figure 1 in the horizontal direction, this surface from processing film W ' to treating fluid X, foreign matter remove liquid aspect be preferred.By as shown in Figure 1, niproll R1, R2 are configured with horizontal direction, process film with longitudinally by niproll R1, R2, therefore, when except liquid, foreign matter is easy to fall together with treating fluid X, thus the absolute magnitude that can make to be held the foreign matter of roller R1, R2 clamping reduces.
On the other hand, related the first roller R1 of niproll and second roller R2 can be with the roller of any one party the mode of the position in the roller higher than the opposing party in non-horizontal direction, configure.In the situation that the first roller R1 and second roller R2 configure in non-horizontal direction, preferably the first roller R1 is disposed at higher position than second roller R2 conventionally.In addition, the first roller R1 and second roller R2 also can configure in vertical direction.In the situation that the first roller R1 and second roller R2 configure in vertical direction, the roller of downside is equivalent to second roller R2.Even in the situation that the first roller R1 and second roller R2 configure in non-horizontal direction, also preferably as shown in Figure 1, the mode being transported towards niproll R1, R2 in vertical direction with the processing film transporting from final deflector roll g configures final deflector roll g.
Deflector roll G continue niproll R1, R2 in top arranges.In addition, the top b of top deflector roll G is disposed at the more upside of the top a of the second roller R2 in described niproll R1, R2.By configuring top deflector roll G with respect to second roller R2 by this way, thereby can make to pass through the minimizing that contacts of processing film W ' with niproll R1, the R2 of niproll R1, R2.
As long as the top b of top deflector roll G is disposed at the more upside of the top a of the second roller R2 in described niproll R1, R2, be not particularly limited.In Fig. 1, deflector roll G above being provided with above the summary of second roller R2.The situation that the travel direction that installs whole treatment process of take is illustrated in figure 1 from left side direction is to the right benchmark, and the setting of top deflector roll G can be disposed at the left side of second roller R2, also can be disposed at the right side of the first roller R1.From the viewpoint of throughput rate, top deflector roll G arranges preferred disposition in vertical direction or the right side of second roller R2.
It should be noted that, with regard to the deflector roll G of top, preferably the top b of deflector roll G is disposed at the more top of the top a of the second roller R2 in niproll R1, R2, but the bottom c of deflector roll G can not be disposed at the more top of the top a of second roller R2.But the bottom c preferred disposition of deflector roll G is in the more top of the top of second roller R2 a.
Fig. 2 shows an example of the optimal way relevant to the configuration of described niproll R1, R2 and described top deflector roll G.As shown in Figure 2, preferably top deflector roll G is disposed at the vertical direction of second roller R2 or the downstream of second roller R2.Particularly, preferably be configured in the following manner: the direction of the imaginary perpendicular line v2 of the imaginary line v1 with respect to each central point s1, the s2 of related the first roller R1 of niproll R1, R2 and second roller R2 are linked is made as to 0 °, this imagination perpendicular line v2, transports the formed angle A of line v3 with the imagination of the direction of the processing film W ' that represents to be transported by described niproll and described top deflector roll G and be 0～be less than 90 °.Described angle A is less more preferred, is preferably below 75 °, more preferably, below 60 °, more preferably, below 30 °, most preferably is 0 °.In Fig. 2, show respectively top deflector roll G1 described angle A be configuration under 0 °, above deflector roll G2 described angle A be configuration under 30 °, above deflector roll G3 described angle A be configuration under 60 ° and above deflector roll G4 in described angle A, be the configuration under 75 °.
In Fig. 1, on deflector roll G, be provided with fluid supply unit Q up.By fluid supply unit Q, supply with various liquid in the surface of deflector roll G upward, thus can be efficiently up the surface of deflector roll G form thin liquid film, can effectively suppress to process the upper knick point producing of film W '.As described fluid supply unit Q, be not particularly limited, can enumerate such as: drip pan, not play dirt felt, nozzle etc., by these fluid supply units Q, can carry out the supply of various liquid.As described liquid, for example can enumerate: water, with each treatment trough in the same treating fluid of the liquid that uses.
In addition, in Fig. 1, corresponding to transport niproll R1, the R2 that processes film W ' from treatment trough Y, can in treatment trough Y, configure niproll R1, the R2 that resin molding W is transported into treatment trough Y.In Fig. 1, do not record the niproll that is transported into treatment trough Y.As mentioned above, in the situation that dispose in treatment trough Y, be transported into niproll R1, the R2 of resin molding and transport niproll R1, the R2 that processes film, can utilize their difference, limit is processed the resin molding W limit that stretches in the longitudinal direction.Conventionally, the in the situation that of implementing to stretch in described treatment process, control as follows niproll R1 separately, the difference of R2,, on the direct of travel of resin molding W, make to be arranged at the peripheral speed of niproll R1, R2 at rear faster than being disposed at the niproll R1 in the place ahead, the peripheral speed of R2.
In addition, although in Fig. 1, do not record, in the front and back of niproll R1, R2, can have liquid remove in the one side side of described processing film W ' or two sides remove liquid unit.As except liquid unit, can enumerate such as: except liquid roller, except liquid rod, scraper, air knife etc.Particularly preferably revolving except liquid roller, contactless air knife.With regard to except with regard to the configuration of liquid unit, from suppressing the generation aspect of scraping, cut, preferably at described processing film ' contact with niproll R1, R2 before.
The travelling speed of described resin molding W (mm/min) is conventionally preferably in the scope of 0.1～30m/min, more preferably in the scope of 1～15mm/min.More than travelling speed is set as to 0.1mm/min, the throughput rate that can make to be derived from the processing film W ' (for example polaroid) of resin molding W improves.On the other hand, by travelling speed is set as below 30m/min, can reduce the situation for the treatment of fluid X convection current due to shearing.
In described treatment trough Y, fill out the treating fluid (details aftermentioned) of processing arbitrarily for resin molding W is carried out.Described resin molding W can contact with treating fluid X by dipping.Described resin molding W processes by processed liquid X, and obtains processing film W '.
In addition, the viscosity for the treatment of fluid X is preferably below 100mPas, more preferably below 50mPas, more preferably below 10mPas.By making the viscosity for the treatment of fluid X, be below 100mPas, can reduce the friction between resin molding W and treating fluid.Consequently, that can suppress the resin molding W that contacts with treating fluid X transports flowing of caused treating fluid, can reduce and process uneven generation.
The resin molding using in manufacture method as processing film of the present invention, can be used various resin materials.Resin material can be according to the suitable choice for use of various uses.As resin material, the material in visible region with light transmission can suitablely be used in the purposes such as blooming.
As translucent resin, for example, can enumerate the water soluble resin of light transmission.With regard to having used the resin molding of water soluble resin of light transmission, suitable use PVA mesentery in the manufacture of polaroid for example.PVA mesentery can be used polyvinyl alcohol (PVA) or derivatives thereof.Derivant as polyvinyl alcohol (PVA), can enumerate polyvinyl formal, Pioloform, polyvinyl acetal etc., can enumerate in addition the modifications such as the unsaturated carboxylic acids such as alkene, acrylic acid, methacrylic acid, crotonic acid such as using ethene, propylene and Arrcostab, acrylamide material.The degree of polymerization of polyvinyl alcohol (PVA) is preferably 100～10000 left and right, and more preferably 1000～10000.General use saponification degree is the material of 80～100 % by mole of left and right.
Except above-mentioned points, as PVA mesentery, can enumerate: vinyl-vinyl acetate copolymer is that the processed thing of the hydrophilic macromolecule films such as partly-hydrolysed film, polyvinyl alcohol (PVA) is, the polyenoid such as desalination acid treatment thing of Polyvinylchloride are alignment films etc.
In described PVA mesentery, can also contain the adjuvants such as plastifier, surfactant.As plastifier, can enumerate polyvalent alcohol and condensation product thereof etc., can enumerate such as glycerine, diglycerol, triglycerin, ethylene glycol, propylene glycol, polyglycol etc.The use amount of plastifier etc. is not particularly limited, but below suitable 20 % by weight that are set as in polyvinyl alcohol mesentery.
In addition, as the water soluble resin of light transmission, can enumerate such as: polyvinyl pyrrolidone is that resin, amylose are resin etc.
The thickness of described resin molding W can suitably be determined according to purposes.The thickness of resin molding W can be used the thickness of 10～300 μ m left and right conventionally, is preferably 20～100 μ m.The film width of described resin molding W is preferably in the scope of 100～4000mm, more preferably in the scope of 500～3500mm.
With regard to described resin molding W, for example, in the situation that the PVA mesentery using in the manufacture of polaroid, its thickness is for example preferably in the scope of 15～110 μ m, more preferably in the scope of 38～110 μ m, further preferably in the scope of 50～100 μ m, in the scope particularly preferably in 60～80 μ m.If the thickness of PVA mesentery is less than 15 μ m, the physical strength of PVA mesentery is too low, becomes and is difficult to carry out the stretching of homogeneous, in the situation that manufacturing polaroid, easily produces color spot.On the other hand, if the thickness of PVA mesentery surpasses 110 μ m, cannot obtain sufficient swelling, therefore the color spot of easily outstanding polaroid, therefore not preferred.
About embodiment of manufacture method of processing film of the present invention, below in reference to accompanying drawing, just by resin molding being implemented to the situation that treatment process obtains blooming, describe.Fig. 3 is that the manufacture method of processing film of the present invention is related, the schematic diagram of an example of the manufacture method of expression polaroid.The manufacture method of polaroid comprises: swelling operation A, dyeing process B, crosslinked operation C, stretching process D and washing procedure E.Fig. 3 is that resin molding (PVA mesentery) W to emitting from stock roll implements successively swelling operation A, dyeing process B, crosslinked operation C, stretching process D, washing procedure E, finally implements situation drying process F, that manufacture polaroid.
In Fig. 3, from outlet roller R1, resin molding W transports by being disposed at niproll R1, the R2 of each treatment trough Y.At the rear of drying process F, there is the take up roll R ' that processes film W '.Resin molding W manage throughout processed in groove Y after, as processing being transported of film.It should be noted that, the upper portion that niproll R1, R2 manage the rear portion of groove Y is throughout configured in the horizontal direction.Above swollen wet operation A anterior, niproll R1, R2 configure in vertical direction.In addition, be disposed at each treatment trough Y(wherein, do not comprising the treatment trough Y of washing procedure E) niproll R1, the top of R2, dispose top deflector roll G.It should be noted that, in Fig. 3, be disposed at niproll R1, R2 between swelling operation A and dyeing process B, dyeing process B and crosslinked operation C, crosslinked operation C and stretching process D, stretching process D and washing procedure E, double as the niproll at rear and the niproll in the place ahead.
In Fig. 3, in each treatment trough Y in swelling operation A, dyeing process B, crosslinked operation C, stretching process D, washing procedure E, use the treating fluid X corresponding to each operation.In Fig. 3, as the treatment process in related each treatment trough Y of swelling operation A, dyeing process B, crosslinked operation C, stretching process D, and dispose top deflector roll G with respect to niproll R1, R2, but the configuration of described niproll R1 of the present invention, R2 and top deflector roll G, as long as implement in the treatment process in any at least one treatment trough Y.Therefore, with regard to the manufacture method treatment process related, that configure niproll R1, R2 and top deflector roll G of processing film of the present invention, in the manufacture method of polaroid with swelling operation A, dyeing process B, crosslinked operation C, stretching process D, washing procedure E, can in operation, apply arbitrarily, also can in plural operation, even whole operation, apply.In addition, in Fig. 3, the configuration of niproll R1, the R2 in each treatment trough Y and top deflector roll G, with roughly the same angle, be highly configured, but the configuration of top deflector roll G can design according to each treatment trough Y.
It should be noted that, Fig. 4 means the schematic diagram of the manufacture method manufacture method related, polaroid of processing film in the past.Fig. 4 is that in swelling operation A, the dyeing process B of Fig. 3, crosslinked operation C, stretching process D and washing procedure E, the rear of managing throughout groove Y disposes niproll R1, R2, but does not configure the situation of top deflector roll G.
Described swelling operation A is the operation that the PVA mesentery as raw material film is contacted with swelling solution (treating fluid).By carrying out this operation, PVA mesentery is washed, thereby can wash the dirt on PVA mesentery surface, antiblocking agent, and by making PVA mesentery swelling, can prevent the unequal inhomogeneity that dyes.
As described swelling solution, can use for example water.And, in swelling solution, can suitably add glycerine, potassium iodide etc.With regard to the concentration of adding, under sweet oil condition, be preferably below 5 % by weight, the in the situation that of potassium iodide, be preferably below 10 % by weight.The temperature of swelling solution is preferably in the scope of 20～45 ℃, more preferably in the scope of 25～40 ℃, further preferably in the scope of 30～35 ℃.In addition, be not particularly limited with the duration of contact of swelling solution, be conventionally preferably 20～300 seconds, more preferably 30～200 seconds, be particularly preferably 30～120 seconds.
In swelling operation A, can suitably stretch.Described draw ratio, with respect to the former length of PVA mesentery, is generally below 6.5 times.From the viewpoint of optical characteristics, described draw ratio is preferably set to 1.2～6.5 times, is more preferably set as 2～6.3 times, is further preferably set to 3～6.1 times.In swelling operation A, by enforcement, stretch, can the stretching in the stretching process D implementing after swelling operation A be controlled littlely, can control not produce the mode of the tension failure of film.On the other hand, large if the draw ratio in swelling operation A becomes, the draw ratio in stretching process becomes too small, the in the situation that of particularly implementing stretching process D after crosslinked operation C, from the viewpoint of optical characteristics, not preferred.
Described dyeing process B is by described PVA mesentery is contacted with the dyeing liquor that contains iodine or dichroic dye (treating fluid), thereby to make described iodine or dichroic dye be adsorbed in the operation of PVA mesentery.Dyeing process B can carry out with stretching process D simultaneously.
As described dyeing liquor, can use iodine is dissolved in to the solution obtaining after solvent.As described solvent, generally make water, but can also further add the organic solvent having with the intermiscibility of water.As the concentration of iodine, the preferably scope in 0.01～10 % by weight, the more preferably scope in 0.02～7 % by weight, the particularly preferably scope in 0.025～5 % by weight.In addition, for the efficiency that makes to dye further improves, preferably also add iodide.As these iodide, can enumerate such as potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc.The adding proportion of these iodide, in described dye bath, is preferably 0.010～10 % by weight, more preferably 0.10～5 % by weight.In them, preferably add potassium iodide, the ratio of iodine and potassium iodide (weight ratio) is the scope in 1:5～1:100 preferably, more preferably the scope in 1:6～1:80, the particularly preferably scope in 1:7～1:70.
Be not particularly limited with the duration of contact of described dyeing liquor, conventionally preferably in the scope of 10～200 seconds, more preferably in the scope of 15～150 seconds, further preferably in the scope of 20～130 seconds.In addition, the temperature of dyeing liquor is preferably in the scope of 5～42 ℃, more preferably in the scope of 10～35 ℃, further preferably in the scope of 12～30 ℃.
Described crosslinked operation C for example makes PVA mesentery contact to carry out crosslinked operation with the crosslinked fluid that contains crosslinking chemical (treating fluid).The order of crosslinked operation C is not particularly limited.Crosslinked operation C can carry out with stretching process D simultaneously.Crosslinked operation C can carry out repeatedly.As described crosslinking chemical, can use known material in the past.Can enumerate such as: boron compounds such as boric acid, borax, glyoxal, glutaraldehyde etc.These materials may be used alone, can also be used in combination two or more.
As described crosslinked fluid, can use the solution that has dissolved described crosslinking chemical and obtain in solvent.As described solvent, for example can make water, in addition, also can contain organic solvent having a miscibility with water.The concentration of the crosslinking chemical in described solution is not particularly limited, preferably in the scope of 1～10 % by weight, more preferably in the scope of 2～6 % by weight.
From obtain the viewpoint of the optical characteristics of homogeneous in the face of polaroid, can in described crosslinked fluid, add iodide.As these iodide, be not particularly limited, can enumerate such as potassium iodide, lithium iodide, sodium iodide, zinc iodide, silver iodide, lead iodide, cupric iodide, barium iodide, calcium iodide, stannic iodide, titanium iodide etc.In addition, the amount of iodide is preferably in the scope of 0.05～15 % by weight, more preferably in the scope of 0.5～8 % by weight.Described illustrative iodide can be used separately a kind of, or can be used in combination more than two kinds.In the situation that being used in combination more than two kinds, the combination of preferred boric acid and potassium iodide.Ratio (weight ratio) as boric acid and potassium iodide, is preferably in the scope of 1:0.1～1:3.5, more preferably in the scope of 1:0.5～1:2.5.
The temperature of described crosslinked fluid is not particularly limited, conventionally preferably in the scope of 20～70 ℃, more preferably in the scope of 20～40 ℃.In addition, be not particularly limited with the duration of contact of PVA mesentery, conventionally preferably in the scope of 5～400 seconds, more preferably in the scope of 50～300 seconds, further preferably in the scope of 150～250 seconds.
Described stretching process D is undertaken by implementing uniaxial tension conventionally.This drawing process can be implemented with dyeing process B, crosslinked operation C simultaneously.Uniaxial tension can utilize the difference of the forward-and-rearward niproll that is disposed at as mentioned above treatment trough Y to carry out.With regard to stretching, generally for example after dyeing process B, stretch having implemented.In addition, can stretch with crosslinked operation C simultaneously.
With regard to stretching process D, with total draw ratio, with respect to the former length of PVA mesentery, with total draw ratio, count the scope of 2～6.5 times and carry out.Be preferably 2.5～6.3 times, more preferably 3～6.1 times.That is, described total draw ratio refers to, in the situation that follow stretching in the swelling operation A described later except stretching process D etc., comprises the draw ratio that is stretching in interior accumulation in these operations.Total draw ratio can be by considering that the draw ratio in swelling operation A etc. suitably determines.If total draw ratio is low, orientation is not enough, thereby is difficult to obtain the polaroid of high optical characteristics (degree of polarization).On the other hand, if total draw ratio is too high, easily produce tension failure, in addition, it is thin that polaroid became, thereby the processability in subsequent handling may decline.
In the treating fluid that can make stretching process D use, contain iodinated compounds.The in the situation that of containing iodinated compounds in making this treating fluid, iodinated compounds concentration is preferably used 0.1～10 % by weight left and right, further preferably uses 0.2～5 % by weight.
The temperature that described processing is bathed is not particularly limited, conventionally preferably in the scope of 20～70 ℃, more preferably in the scope of 20～40 ℃.In addition, be not particularly limited with the duration of contact of PVA mesentery, conventionally preferably in the scope of 5～100 seconds, more preferably in the scope of 10～80 seconds, further preferably in the scope of 20～70 seconds.
In the manufacture method of polaroid, implementing to implement washing procedure E after described operation.Washing procedure E can utilize the aqueous solution (treating fluid) that contains iodide to carry out.Iodide as in the described aqueous solution that contains iodide, can be used aforesaid material, wherein, and such as preferred potassium iodide, sodium iodide etc.The aqueous solution that contains iodide by this, can wash the residual boric acid using in described crosslinked operation off from PVA mesentery.With regard to described aqueous solution, the in the situation that of potassium iodide aqueous solution, its concentration is for example preferably in the scope of 0.5～20 % by weight, more preferably in the scope of 1～15 % by weight, further preferably in the scope of 1.5～7 % by weight.
The temperature of the described aqueous solution that contains iodide is not particularly limited, conventionally preferably in the scope of 15～40 ℃, more preferably in the scope of 20～35 ℃.In addition, be not particularly limited with the duration of contact of PVA mesentery, conventionally preferably in the scope of 2～30 seconds, more preferably in the scope of 3～20 seconds.
It should be noted that, in the manufacture method of polaroid related swelling operation A, dyeing process B, crosslinked operation C, stretching process D, washing procedure E, in the situation that not applying treatment process of the present invention, PVA mesentery and treating fluid can be processed by various contact methods.As other contact method, can enumerate such as: the method for flooding in treating fluid, the method being coated with, the method for spraying etc.Dip time while utilizing these methods and the temperature of body lotion can suitably be set as required.
After having implemented described each operation, last, implement drying process, thereby produce polaroid.As described drying process, can use the suitable methods such as natural drying, air-dry, heat drying, but conventionally preferably use heat drying.In the situation that carrying out heat drying, heating-up temperature is not particularly limited, conventionally preferably in the scope of 25～80 ℃, more preferably in the scope of 30～70 ℃, further preferably in the scope of 30～60 ℃.In addition, be preferably drying time about 1～10 minute.
Resulting polaroid can be formed according to well-established law it and at least simultaneously be provided with the polarization plates of transparent protective film.As the material that forms transparent protective film, can use excellent thermoplastic resins such as the transparency, physical strength, thermal stability, the disconnected property of water resistance, isotropy.As the concrete example of such thermoplastic resin, can enumerate: the celluosic resins such as triacetyl cellulose, vibrin, polyethersulfone resin, polysulfone resin, polycarbonate resin, polyamide, polyimide resin, polyolefin resin, (methyl) acrylic resin, cyclic polyolefin resin (norbornene resin), polyarylate resin, polystyrene resin, polyvinyl alcohol resin and their potpourri.
Embodiment
Below, illustratively preferred embodiment of the present invention is elaborated.But, with regard to the material recorded in this embodiment, use level, the record being only particularly limited, otherwise the present invention is not limited thereto.
Embodiment 1
The preparation > of < PVA mesentery
Prepare raw material PVA mesentery ((strain) Kuraray system, trade name: VF-PS750).The width of this PVA mesentery is 3100mm, and thickness is 75 μ m.
The making > of < polaroid
Use the manufacturing installation of the present invention shown in described Fig. 3, carry out successively swelling operation, dyeing process, crosslinked operation, stretching process, washing procedure, drying process.More specifically as described below.It should be noted that, each treatment trough using in each operation of swelling operation, dyeing process, crosslinked-stretching process and washing procedure is horizontally disposed with.The travelling speed of PVA mesentery is 12m/min.Upper portion at the rear portion of each treatment trough of swelling operation, dyeing process, crosslinked operation, stretching process, as shown in Figure 2, niproll R1, R2 and top deflector roll G be take imaginary perpendicular line v2 and are transported the mode that the formed angle A of line v3 is 0 ° and be configured with imagination.In addition, configure in the following manner final deflector roll g, that is, the processing film transporting from the final deflector roll g of each treatment trough Y, transports towards niproll R1, R2 in vertical direction.In addition, above each, on deflector roll G, drip pan is set as fluid supply unit.
< < swelling operation > >
In treatment trough, fill up swelling solution (water, 30 ℃ of liquid temperatures).In addition, be 30 seconds the duration of contact of swelling solution and PVA mesentery, and swelling is carried out on the limit that stretches on longitudinal direction, limit.The draw ratio of longitudinal direction is 2.4 times with respect to the PVA mesentery of unstretched state.
< < dyeing process > >
In treatment trough, fill up dyeing liquor (iodine aqueous solution of 0.035 % by weight (potassium iodide that contains 0.07 % by weight), 25 ℃ of liquid temperatures).In addition, be 30 seconds the duration of contact of dyeing liquor and PVA mesentery, dyes in the limit that stretches on longitudinal direction, limit.The draw ratio of longitudinal direction is 3.3 times with respect to the PVA mesentery of unstretched state.
< < is cross-linked operation > >
In treatment trough, fill up crosslinked fluid (aqueous solution of the potassium iodide of the boric acid that contains 2.5 % by weight and 2 % by weight, 35 ℃ of liquid temperatures).In addition, be 60 seconds the duration of contact of crosslinked fluid and PVA mesentery, dyes in the limit that stretches on longitudinal direction, limit.The draw ratio of longitudinal direction is 3.5 times with respect to the PVA mesentery of unstretched state.
< < stretching process > >
In treatment trough, fill up crosslinked fluid (aqueous solution of the potassium iodide of the boric acid that contains 2.5 % by weight and 2 % by weight, 60 ℃ of liquid temperatures).In addition, be 60 seconds the duration of contact of crosslinked fluid and PVA mesentery, dyes in the limit that stretches on longitudinal direction, limit.The draw ratio of longitudinal direction is 6.55 times with respect to the PVA mesentery of unstretched state.
< < washing procedure > >
In treatment trough, fill up and adjust liquid (aqueous solution of hydrogen iodide of 2.5 % by weight, 30 ℃ of liquid temperatures).In addition, be 15 seconds the duration of contact of adjustment liquid and PVA mesentery.
< < drying process > >
For the PVA mesentery after washing procedure, under 40 ℃ of baking temperatures, the condition of 200 seconds drying times, be dried.Then, the both ends of PVA mesentery are cut off, and using polyethylene terephthalate as batching every paper.Thus, make the polaroid of drum.The thickness of resulting polaroid is 30 μ m.
The making > of < polarization plates
About polarization plates, use laminating machine, by PVA, be tackifier (Japanese synthetic chemistry (strain) system, trade name: NH18) in the two sides of described polaroid laminating tri acetyl cellulose membrane (Fuji's film (strain) system, trade name: TD80UL).Binding temperature is 25 ℃.Then, use air circulating type constant temperature oven, under the condition of 55 ℃, 300 seconds, make the duplexer after laminating dry.Make thus polarization plates.
Comparative example 1
The making > of < polaroid
Use raw material PVA mesentery similarly to Example 1.Use the manufacturing installation shown in described Fig. 4, carry out successively swelling operation, dyeing process, crosslinked-stretching process, washing procedure, drying process.The travelling speed of PVA mesentery is 12m/min.
The making > of < polarization plates
The related polarization plates of comparative example 1 is to make with the same mode of described embodiment 1.
The polarization plates obtaining in embodiment and comparative example is cut out to 30m, carry out following evaluation.Show the result in table 1.
(confirmation of foreign matter)
For the polarization plates of each sample, by having or not and number of scars (bright spot) more than Visual Confirmation 200 μ m.
(knick point defect)
The polarization plates of each sample is positioned under fluorescent light.In the light source side of the polarization plates of sample, so that the mode of suction light shaft positive cross separately arranges another polarization plates, and under this state, count the number of light leak position (knick point defect).
Table 1
By table 1, can be confirmed, in the related polaroid of embodiment, the scar of film is also few, can reduce knick point.
Label declaration
R1, R2 niproll
G top deflector roll
X treating fluid
Y treatment trough
W resin molding
Q fluid supply unit
Claims (10)
1. a manufacture method of processing film, wherein by resin molding, manufactured the processing film of this resin molding, the manufacture method of this processing film at least has limit makes the described resin molding of long size shape contact to process with the treating fluid in treatment trough the treatment process that transport on limit, the manufacture method of described processing film is characterised in that
Described at least one, treatment process has: the described processing film obtaining by this treatment process is transported in described treatment trough, by by the first roller and second roller, (carriage direction of processing film of take is benchmark, upstream side is made as to the first roller, downstream is made as to second roller) niproll that forms and continue described niproll and operation that the deflector roll that configures transports
And described deflector roll is the top deflector roll that the top of this deflector roll is disposed at the position more closer to the top than the top of the second roller in described niproll.
2. the manufacture method of processing film according to claim 1, is characterized in that, described top deflector roll is provided with to the fluid supply unit of the surperficial feed flow of this top deflector roll.
3. the manufacture method of processing film according to claim 1 and 2, it is characterized in that, described niproll and described top deflector roll configure as follows,, the direction of imaginary perpendicular line with respect to linking the imaginary line of the first roller of described niproll and each central point of second roller is made as to 0 °, this imagination perpendicular line, transports the formed angle of line with the imagination of the direction of the processing film that represents to transport by described niproll and described top deflector roll and be 0～be less than 90 °.
4. the manufacture method of processing film according to claim 1 and 2, wherein, with respect to the niproll that described processing film is transported, in described treatment trough, dispose other the niproll that described resin molding is transported into described treatment trough, utilize the difference of these niprolls, limit is processed the resin molding of the long size shape limit that stretches in the longitudinal direction.
5. the manufacture method of processing film according to claim 1 and 2, is characterized in that, by the processing film that described resin molding enforcement treatment process is obtained, is blooming.
6. the manufacture method of processing film according to claim 5, is characterized in that,
Described resin molding is polyvinyl alcohol mesentery,
And described treatment process at least comprises swelling operation, dyeing process, crosslinked operation, stretching process and washing procedure, and at least one operation in swelling operation, dyeing process, crosslinked operation, stretching process and washing procedure, the operation of have resulting processing film is transported in described treatment trough, the top deflector roll by described niproll and the described niproll configuration that continues transporting
Manufacture as the polaroid of processing film.
7. a manufacturing installation of processing film, is characterized in that,
Possess at least one treatment trough, described treatment trough will fill up the treating fluid of processing arbitrarily for resin molding is carried out,
Described treatment trough has that (carriage direction of processing film of take is benchmark by the first roller and second roller, upstream side is made as to the first roller, downstream is made as to second roller) niproll that forms and continue described niproll and the deflector roll that configures, described niproll and deflector roll transport for the processing film after this treatment trough is processed is transported in this treatment trough, and described deflector roll is the top deflector roll that the top of this deflector roll is disposed at the position more closer to the top than the top of the second roller in described niproll.
8. manufacturing installation according to claim 7, is characterized in that, above described deflector roll be provided with to this above the fluid supply unit of surperficial feed flow of deflector roll.
9. according to the manufacturing installation described in claim 7 or 8, it is characterized in that, described niproll and described top deflector roll configure as follows,, the direction of imaginary perpendicular line with respect to linking the imaginary line of the first roller of described niproll and each central point of second roller is made as to 0 °, this imagination perpendicular line, transports the formed angle of line with the imagination of the direction of the processing film that represents to transport by described niproll and described top deflector roll and be 0～be less than 90 °.
10. according to the manufacturing installation described in claim 7 or 8, it is characterized in that, with respect to the niproll that described processing film is transported, in described treatment trough, dispose other the niproll that described resin molding is transported into described treatment trough.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2011169468A JP5969180B2 (en) | 2011-08-02 | 2011-08-02 | Processed film manufacturing method and apparatus |
| JP2011-169468 | 2011-08-02 | ||
| PCT/JP2012/069463 WO2013018798A1 (en) | 2011-08-02 | 2012-07-31 | Process film manufacturing method and manufacturing device |
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| CN103718071A true CN103718071A (en) | 2014-04-09 |
| CN103718071B CN103718071B (en) | 2016-09-28 |
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| JP (1) | JP5969180B2 (en) |
| KR (1) | KR102000306B1 (en) |
| CN (1) | CN103718071B (en) |
| TW (1) | TWI580626B (en) |
| WO (1) | WO2013018798A1 (en) |
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| CN109212650A (en) * | 2017-07-03 | 2019-01-15 | 住友化学株式会社 | The manufacturing method and manufacturing device of polarizing coating |
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| JP6191197B2 (en) * | 2013-03-29 | 2017-09-06 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP6339350B2 (en) * | 2013-11-22 | 2018-06-06 | 住友化学株式会社 | Manufacturing method of polarizing film |
| JP6444858B2 (en) * | 2013-11-26 | 2018-12-26 | 株式会社クラレ | Manufacturing method of polarizing film |
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| TWI553046B (en) * | 2015-08-28 | 2016-10-11 | 住華科技股份有限公司 | Method of manufacturing polarizer film |
| TWI790207B (en) * | 2016-07-20 | 2023-01-21 | 日商可樂麗股份有限公司 | Method for producing polarizing film |
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| JP7109896B2 (en) * | 2017-10-02 | 2022-08-01 | 住友化学株式会社 | Polarizing film manufacturing method and polarizing film manufacturing apparatus |
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Also Published As
| Publication number | Publication date |
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| TWI580626B (en) | 2017-05-01 |
| KR20140067010A (en) | 2014-06-03 |
| TW201315668A (en) | 2013-04-16 |
| CN103718071B (en) | 2016-09-28 |
| JP2013033154A (en) | 2013-02-14 |
| JP5969180B2 (en) | 2016-08-17 |
| KR102000306B1 (en) | 2019-07-15 |
| WO2013018798A1 (en) | 2013-02-07 |
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