CN1341510A - Solution film-making method - Google Patents
Solution film-making method Download PDFInfo
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- CN1341510A CN1341510A CN 01140709 CN01140709A CN1341510A CN 1341510 A CN1341510 A CN 1341510A CN 01140709 CN01140709 CN 01140709 CN 01140709 A CN01140709 A CN 01140709A CN 1341510 A CN1341510 A CN 1341510A
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- continuity
- solution film
- film
- forming method
- fluxion strap
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Abstract
The invention provides a method for increasing a production rate, in a method for manufacturing a cellulose acetate film using a casting band. In the solution film manufacturing method using the casting band, the subject method issue is solved by the cellulose acetate solution film manufacturing method which is characterized in that a back suction device is installed behind a casting die and the interval between the back suction device and the casting band is 0.3-3 mm.
Description
The invention relates to the solution film-forming method of making the plain films of acetic ester fiber such as triacetate cellulose with continuity fluxion strap method fast.
The film that is used for optical applications etc. is that the film of cellulose/triacetate etc. is made as base-material, utilizes solution film-forming method to make the film of this triacetate cellulose etc.Solution film-forming method is that the polymer solution that will be dissolved in the organic solvent continues on the supporter that flows from mould, and utilization is located near the relief chamber of mould, ribbon (from mould outlet to the liquid film that drops on the supporter, below identical) is closely contacted with supporter.As this solution film-forming method, for example, in the special public clear 49-36946 communique a kind of method has been proposed, that is, and in order to prevent to be mixed with air, setting has the relief chamber of 2 suction chambers, the fluid composition casting method that liquid combination logistics and roller are closely contacted has proposed a kind of device in special public clear 62-38133 communique and the special public clear 63-57222 communique, promptly, by be arranged to 2 vacuum regions with division board, make the even hold down gag of the band of end drop stabilisation.A kind of edge gas leakage, evenly method of fixed band of preventing disclosed in No. 4310295 specifications of USP.
In manufacturing is flowed in the continuity of the plain film of acetic ester fiber, also require high speed in order to enhance productivity.The high speed problem that the plain continuity of this acetic ester fiber is flowed is the phenomenon with air.For anti-phenomenon here takes place, adopt lowering viscousity and the low concentration or the back of the body suction method of dope.Yet, lowering viscousity and low concentration, behind continuity flow system film on the supporter, being easy to generate increases drying load and produces inhomogeneous and uneven drying even because of dry wind, greatly damaged the quality of system film, on the other hand, in back of the body suction method, when with the spacing of supporter when very big, be subjected to carrying on the back the influence of inhaling inflow wind, can scratch the disorderly stability of continuity fluxion strap, when narrow, relief chamber contacts with supporter can the damage supporter.The method of the method for use continuity fluxion strap and use continuity running barrel compares, and the drying time on supporter is longer, though the flatness of film is fine, is damaging in the continuity fluxion straps such as surperficial stainless steel and copper easily, does not use usually to carry on the back and inhales the chamber.
The purpose of this invention is to provide a kind of method that in the method for using the plain film of continuity fluxion strap manufacturing acetic ester fiber, improves speed of production.
Present inventors find, compare with continuing the running barrel method, and the productivity of the continuity fluxion strap method that further investigation raising thin film planar etc. are good, the result is, even the continuity fluxion strap is very narrow, but but the zone that still there is the steady production film in back of the body suction device is set.At this moment find good back of the body suction pressure limit of existence, and then back of the body suction device self also has a good structure.
That is, the invention provides a kind of acetic ester fiber cellulose solution film-forming method, it is characterized in that, in the solution film-forming method that uses the continuity fluxion strap, at the rear that continues the mould that flows the back of the body is set and inhales device, the spacing that this back of the body is inhaled device and continuity fluxion strap is taken as 0.3～3mm,
The feature of above-mentioned solution film-forming method is, will carry on the back to inhale static pressure and be taken as-10Pa～500Pa,
The feature of above-mentioned solution film-forming method is, it is to be made of 2 above relief chambers that the back of the body is inhaled device, and
The feature of above-mentioned solution film-forming method is that the width end of inhaling the chamber at the back of the body forms bent road formula structure.
Fig. 1 is the ideograph of the mobile mould part of solution film-forming device continuity.
Fig. 2 is a solution film-forming device ideograph of implementing solution film-forming method of the present invention.
Fig. 3 is the plane of the mobile mould part of continuity among Fig. 1.
Fig. 4 is the ground plan that the back of the body is inhaled device among Fig. 3.
Fig. 5 is the continuity that is used to implement the solution film-forming device of the solution film-forming method of the present invention mold pattern sectional drawing that flows.
Fig. 6 is the continuity that is used to implement the solution film-forming device of the solution film-forming method of the present invention mold pattern sectional drawing that flows.
Fig. 7 is the continuity that is used to implement the solution film-forming device of the solution film-forming method of the present invention mold pattern sectional drawing that flows.
Illustrated among Fig. 2 implement solution film-forming method of the present invention, use effects on surface to carry out the mirror process continuity The solution film-forming device brief configuration of fluxion strap.
In belt solution film-forming device shown in Figure 2, the 10th, the mobile mould of continuity is with the mobile mould of this continuity Tool 10 is oppositely arranged swing roller 20, and reeling at this swing roller 20 movably continues fluxion strap 30. With the mobile mould 10 of continuity the back of the body is set adjacently and inhales device 40, this back of the body is inhaled device 40 by attraction pipeline 50 Are connected with dsah-pot and are connected with air blast 70,21 for peeling off roller.
Fig. 1 shows near the part enlarged drawing the back of the body suction device 40. The back of the body is inhaled device 40 from continuing mobile mould The back of the ribbon dope 1 that 10 continuities are flowed out attracts, and makes the mobile dope close attachment of continuity at supporter On, and prevent from simultaneously producing with air.
The back of the body is inhaled device, with the corresponding shape of the mobile mould of side and continuity, forms as a whole box structure.
Plane with Fig. 1 counterpart has been shown among Fig. 3, the ground plan that the back of the body is inhaled device has been shown among Fig. 4. This back of the body is inhaled top, forward and backward of device, two sides and all seal, only has bottom surface formation opening.
This back of the body is inhaled device with respect to the whole width setting of the mobile mould of continuity.
The back of the body among Fig. 1 is inhaled device and be separated into Room 2 formation relief chamber 41,42 on width, and the connector 43 of attraction pipeline is respectively established one near the both side ends on rear side relief chamber 42.With the isolated partition wall 44 of two relief chambers 41,42 is dull and stereotyped, separates from top to bottom between two chambeies 41,42.Therefore, the relief chamber 41 of front side, all around and above form sealing, by its bottom surface and continuity fluxion strap 30 or and continuity flow in the relief chamber 42 of the gap transmission rear side between the swing roller 80, carry out its decompression with this.The bottom surface of rear side relief chamber 42 all forms opening.By relief chamber 41,42 is separated into 2 chambers, stopped the wind between attraction pipeline and banded dope like this.Thereby reduced the influence of wind.
The end that preferably will carry on the back the width part of inhaling the chamber forms bent line structure.Among Fig. 4, relief chamber 41 two side ends in the front side are provided with bent road 45, and each Qu Luyong flat board from the upper end setting of relief chamber 41 with separating the lower end generally.Utilize this Qu Lu to restrain the inflow of two ends wind, and reduced vortex phenomenon.
The bottom surface that the above-mentioned back of the body is inhaled device 40 is 0.3～3mm with the spacing that continues fluxion strap 30 surfaces, best 0.5～1.5mm.When narrower than 0.3mm, the existence back of the body is inhaled the danger that the device bottom surface abrades supporting body surface, when wideer than 3mm, can increase the air quantity that decompression causes that the suction device of supporting or opposing flows into, and becomes the unstable reason of the mobile banded dope of continuity.
The static pressure that the back of the body is inhaled the chamber is-10～-500Pa, best-10～-100Pa
The spacing h of mobile mould of continuity and supporter is set at 1～10mm usually, preferably is set at the scope of 1.5～6mm, but is not limited thereto.
The viscosity of dope is set at the scope of 10～1000P usually, preferably is set at the scope of 100～800P, but is not limited thereto.
Cut gap (リ ッ プ Network リ ア ラ Application ス) c1 and be set at the scope of 0.2～3mm usually, preferably be set at the scope of 0.5～2mm, unqualified to this.
Continuity flowing velocity V is set at 3～150m/ minute scope usually, is preferably 10～100m/ minute, and is unqualified to this.
The thickness t of film is 20～500 μ m, better 30～300 μ m, and more preferably 35～200 μ m are unqualified to this.
In the solution film-forming method of the present invention, as the polymer that can be used for being dissolved in the polymer solution in the organic solvent, triacetate cellulose, diacetate cellulose etc. are arranged, as organic solvent, main solvent has methylene chloride, ethyl acetate etc., and secondary solvent has methyl alcohol, butanols, acetone etc.
As the mobile mould of above-mentioned continuity, can use the mould shown in Fig. 5, Fig. 6 and Fig. 7.
Fig. 5 is the mobile mould of continuity that uses when making single thin film, and the mobile mould 10 of this continuity forms 1 manifold 11.Fig. 6 is the coextensive afterflow moving mold of many menifolds type, and this coextensive afterflow moving mold 10 forms 3 menifolds 12, can make the film that constitutes by 3 layers.Fig. 7 is the coextensive afterflow moving mold of feed piece (Off ィ one De Block ロ ッ Network) type, and this coextensive afterflow moving mold 10 forms menifold 13, is provided with feed 14 simultaneously, and interflow in feed piece 14 is flowed the dope continuity that forms several layers (among Fig. 7 being 3 layers).
In mould is flowed in above continuity, though used coating suspension bracket mould, be not limited to this, also can use the mould of other shapes such as T mould.
Embodiment
The raw material that uses in the solution film-forming operation is as follows
Triacetate cellulose 100 weight portions
Triphenyl 10 weight portions
Two phenyl diphenyl phosphoester 5 weight portions
Methylene chloride 315 weight portions
Methyl alcohol 60 weight portions
N-butanols 10 weight portions
Secondary flow solution composition when coextensive afterflow is moving
Triacetate cellulose 100 weight portions
Triphenyl 10 weight portions
Two phenyl diphenyl phosphoester 5 weight portions
Methylene chloride 400 weight portions
Methyl alcohol 75 weight portions
N-butanols 13 weight portions
With each condition of embodiment, observation has or not with the air phenomenon, the stability of continuity fluxion strap.
Embodiment 1
Make film under the following conditions
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m
4) back of the body is inhaled static pressure P=30Pa
5) back of the body is inhaled the spacing d=1.0mm of device and continuity fluxion strap
Do not take place with air, the continuity fluxion strap is stable.
Embodiment 2
Under the following conditions, utilize coextensive continuous flow method system film.
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m, main flow thickness=76 μ m, secondary flow thickness (levels)=each 2 μ m
4) back of the body is inhaled static pressure P=-30Pa
5) back of the body is inhaled the spacing d=1.0mm of device and continuity fluxion strap
Do not take place with air, the continuity fluxion strap is stable.
Embodiment 3
Change the dope prescription, with following condition system film.
Triacetate cellulose 100 weight portions
Two phenyl diphenyl phosphoester 5 weight portions
Methyl acetate 315 weight portions
Ethanol 60 weight portions
N-butanols 10 weight portions
With triacetate cellulose swelling 30 minutes, after cooling under-70 ℃, be heated to 50 ℃ of dissolvings with solvent.
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m
4) back of the body is inhaled static pressure P=-30Pa
5) back of the body is inhaled the spacing d=1.0mm of device and continuity fluxion strap
Do not take place with air, the continuity fluxion strap is stable.
Comparative example 1
Make film under the following conditions.
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m
4) not having the back of the body inhales
Generation can not be proceeded continuity and flow with air.
Comparative example 2
Make film under the following conditions
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m
4) back of the body is inhaled static pressure P=-2Pa
5) back of the body is inhaled the spacing d=1.0mm of device and continuity fluxion strap
Generation can not be flowed with air in continuity.
Comparative example 3
Make film under the following conditions.
1) the spacing h=3mm of mobile mould of continuity and supporter
2) the continuity flowing velocity is V=45m/ minute
3) base-material thickness t=80 μ m
4) back of the body is inhaled static pressure P=-30Pa
5) back of the body is inhaled the spacing d=3.5mm of device and continuity fluxion strap
Though do not take place with air, the continuity fluxion strap produces and shakes instability.
Embodiment 4
The film that makes with the method for embodiment 1-3 is made Polarizer as the diaphragm of Polarizer, estimates durability.
The preparation method of Polarizer
The making of Polarizer sample is that polyvinyl alcohol is extended, and utilizes the polyethenol series bonding agent, is fitted in to form on two faces of polarization element of absorption iodine.At 60 ℃, the environment of 90%RH exposes 500 hours down with this Polarizer sample.The degree of polarization of any one sample confirms to have enough durability more than 99.6%.
The evaluation method of degree of polarization
Utilize spectrophotometer to obtain parallel transmitance Yp, square crossing transmitance Yc in the visible region, determine degree of polarization P according to following formula.
-P＝√((Yp-Yc)/(Yp＋Yc))
According to the present invention, use the continuity fluxion strap to make the plain film of acetic ester fiber, can enhance productivity.
Claims (7)
1, a kind of solution film-forming method of acetic ester fiber element is characterized in that in the solution film-forming method that uses the continuity fluxion strap, in the behind that continues the mould that flows the back of the body is set and inhales device, and the spacing of this back of the body being inhaled device and continuity fluxion strap is taken as 0.3～3mm.
2, according to the solution film-forming method of claim 1 record, it is characterized in that the static pressure of carrying on the back suction be taken as-10Pa～-500Pa.
3,, it is characterized in that carrying on the back the suction device and constitute by the relief chamber more than 2 according to the solution film-forming method of claim 1 or 2 records.
4,, it is characterized in that carrying on the back the width end of inhaling device and form bent line structure according to the solution film-forming method of claim 3 record.
5, according to the solution film-forming method of claim 3 or 4 records, it is wideer than the width of continuity fluxion strap to it is characterized in that carrying on the back the width of inhaling device, attracts from the outside that continues the fluxion strap end.
6, according to the solution film-forming methods of claim 3,4 or 5 records, the back of the body that the spacing that it is characterized in that will the back of the body inhaling device and continuity fluxion strap forms narrow is inhaled apparatus surface and is formed by the materials such as rubber of not damaging the continuity fluxion strap.
7, utilize the polarization board protective film and the Polarizer of the method system film of claim 1,2,3,4,5 or 6 records.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000257118 | 2000-08-28 | ||
| JP2000257118 | 2000-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1341510A true CN1341510A (en) | 2002-03-27 |
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ID=18745633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01140709 Pending CN1341510A (en) | 2000-08-28 | 2001-08-28 | Solution film-making method |
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| Country | Link |
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| CN (1) | CN1341510A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248625A (en) * | 2011-06-10 | 2011-11-23 | 青岛海诺水务科技股份有限公司 | Device for statically pouring membrane element |
| CN103144233A (en) * | 2013-03-28 | 2013-06-12 | 桂林电器科学研究院有限公司 | Extruding, casting molding defoamer of polyamide acid amine resin |
| CN107097373A (en) * | 2016-02-19 | 2017-08-29 | 富士胶片株式会社 | Casting device and solution film-forming method |
| CN107636056A (en) * | 2015-02-27 | 2018-01-26 | 艾兰德高分子工业有限公司 | Multifunctional optical high transparency film and its production method |
-
2001
- 2001-08-28 CN CN 01140709 patent/CN1341510A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248625A (en) * | 2011-06-10 | 2011-11-23 | 青岛海诺水务科技股份有限公司 | Device for statically pouring membrane element |
| CN103144233A (en) * | 2013-03-28 | 2013-06-12 | 桂林电器科学研究院有限公司 | Extruding, casting molding defoamer of polyamide acid amine resin |
| CN103144233B (en) * | 2013-03-28 | 2015-04-15 | 桂林电器科学研究院有限公司 | Extruding, casting molding defoamer of polyamide acid amine resin |
| CN107636056A (en) * | 2015-02-27 | 2018-01-26 | 艾兰德高分子工业有限公司 | Multifunctional optical high transparency film and its production method |
| CN107097373A (en) * | 2016-02-19 | 2017-08-29 | 富士胶片株式会社 | Casting device and solution film-forming method |
| CN107097373B (en) * | 2016-02-19 | 2020-10-09 | 富士胶片株式会社 | Casting device and solution film forming method |
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