CN1155839C - Continuous H-type polarization film producing process - Google Patents
Continuous H-type polarization film producing process Download PDFInfo
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- CN1155839C CN1155839C CNB001056697A CN00105669A CN1155839C CN 1155839 C CN1155839 C CN 1155839C CN B001056697 A CNB001056697 A CN B001056697A CN 00105669 A CN00105669 A CN 00105669A CN 1155839 C CN1155839 C CN 1155839C
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- polarizing coating
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- polyvinyl alcohol
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Abstract
The present invention belongs to a continuous production method for new optical material which is widely applied to the fields of liquid crystal displays, photographic equipment, optical instruments, traffic safety measures, etc. Although the new optical material has large market demand quantity, the new optical material has wide prospects only when the cost is low. The present invention is characterized in that the continuous production method on the premise of ensuring the quality comprises continuously producing polyvinyl alcohol film base material and H type polarization films, and thereby, the purposes of large production quantity and low cost can be achieved.
Description
The present invention relates to a kind of continuous producing method of optical material H type polarizing coating.
After iodine solution, borate were handled, stretching, fork-like farm tool used in ancient China was wide more more for the H type polarizing coating application made from polyvinyl alcohol (PVA) (hereinafter to be referred as PVA) film.The safety goggles of making anti-strong instantaneous light, common sunglasses and make in the application of liquid crystal display device or the LCD TV of at home and abroad greatly developing, notebook computer and use as the dazzle that prevents automobile lamp in broad prospect of application is all arranged, demand is very big.Several aspects such as current, the output that how to be situated between certainly is big, constant product quality, cost of products are low receive domestic and international concern.
Background technology
The method of in the past making H type polarizing coating can only be confined to manual formula, intermittently production or local production continuously, the factory that promptly makes polarizing coating buys the PVA basement membrane of other factory's production as producing starting material, thereby the PVA raw material does not carry out the with the passing of time flavescence of pre-service polarisation-affecting film by the special requirement of producing polarizing coating, easily absorb water in air part, cause unstable product quality.
Summary of the invention
Purpose of the present invention is provided on the production line exactly, adopts domestic raw material, guarantees constant product quality, reduces cost of products, continuously produces the method for H type polarizing coating.The shortcoming that overcome quality instability in the present polarizing coating production, yield poorly, cost is high.
Another object of the present invention is that raw material is done necessary the processing, at first is to clean raw material, the PVA of acetate in the raw material and low polymerization degree is washed, to improve the quality of products.
Another object of the present invention has provided a kind of film formation device that particular requirement is arranged that can produce the PVA film continuously.Overcome at present the shortcoming that mode or local continuation mode are by hand made polarizing coating.
Another object of the present invention is to adopt spreading roll in drawing machine, in case film is sent out wrinkle and reached expanding and effectively stretching in the drawing process, and improves stretching output.
Another object of the present invention is that the iodine solution prescription and the borate formula rate that adopt improve, so that effective complexing of iodine molecule and polyvinyl alcohol (PVA) reaches dichroic reinforcement, makes the polarizing coating product quality more stable.
Other details of the present invention and advantage are illustrated in for best implementation detail of the present invention together with accompanying drawing following.
Description of drawings
Fig. 1 is for doing the film formation device of PVA film continuously.Wherein 1 is the carrier winding up roller, and 2 is last film device, and 3 is the slip container, and 4 is well heater, and 5 is exhaust blower, and 6 is film gatherer, and 7 is PVA film rolling film roller, and 8 is fully sheathed case, also claims drying tunnel.
Fig. 2 is for doing the device of H type polarizing coating continuously.Wherein 7 is PVA film rolling film roller, and 9 is the stripping machine, and 10 is tank; 11 is the iodine solution groove, and l2 is a tank, and 13 is the boric acid liquid bath; in establish spreading roll; 14 is tank, and 15 is dewaterer, and 16 is dryer; 17 is superimposed diaphragm device; 18 is superimposed antiadhesion barrier device, and 16,17,18 all have drive unit, and 19 is cutter.
Specific implementation method
The first step of the invention process is to produce the PVA film, comprising get the raw materials ready and film forming before raw material is done necessary the processing earlier, required film will be made by film formation device in polyvinyl alcohol (PVA) dissolving back.
Second step of the invention process is to make polarizing coating.Integrate the PVA film and give processing, chemical treatment, stretching and superimposed continuous processing.
As everyone knows, the PVA film has more the characteristic of chelated iodine molecule than other polymkeric substance, and iodine molecule has intrinsic dichroism, and such PVA film unilateral stretching can be obtained different optical absorption characteristics.Temperature when the control stretching degree is with stretching effectively can obtain the polarizing coating that suitable degree of polarization and color are fit to.
Specific implementation method is as follows:
(1) at first be to clean raw material to purify, the PVA of acetate in the raw material and low polymerization degree is washed, its method is in packing raw material into the silk bag clean, tight mouthful, make in the bag and evacuate, be placed on and make it the swelling cleaning in the container that fills distilled water, swelling is more than 24 hours, change water three times, be the color that neutrality is PH=7, use centrifuge dripping silk bag then through the test paper check.Add the ratio of 950 ml distilled waters in 50 gram PVA, put into the dissolution kettle of stirrer, speed of agitator is the 70-100 cycle per minute, progressively adds PVA.For making the film softness, can add the glycerine more than 10%, water temperature 90-95 ℃, be stirred to till whole dissolvings.Whether check is dissolved the slip adding 1-2 that can take a morsel fully and is dripped iodine liquid, as the blue look granule shape transparent body occurs, and dissolving fully is described as yet, evenly spreads as color and luster, and dissolving fully is described.The PVA of process dissolving is incubated then with strainer filtering (can adopt the bacterium funnel No. 3) and leaves standstill bubble about 80 ℃.
(2) film-forming process
By key drawing 1, film-forming process is elaborated,
Be provided with on the carrier winding up roller 1 of damping unit, the barrier paper of 1000 millimeters of volume fabric widths is installed; PVA solution in the container 3 is served barrier paper to solution by clockwise rotating of last film device 2, solution what are sent, determined the thickness of rete.Regulating temperature is 40 ℃, and temperature is too high, is easy to generate the tangerine peel phenomenon and sends out wrinkle, and temperature is too low to be unfavorable for impelling rete to do soon, preferably will regulate exhaust air rate, and being that rete is easily dried can not make rete wrinkling again.Quartz heating-pipe 4 is installed in the appropriate location that fully sheathed case 8 is a drying tunnel, according to the length setting of drying tunnel, preferably every 1.5--2 rice a quartz heating-pipe is set.It is outdoor that the effect of exhaust blower 5 is that the moist hot-air with drying tunnel is discharged to, and its position distribution is along the line at drying tunnel, and air quantity is soft an amount of, regulates the way of air quantity and generally controls with valve.Do not wander off when advancing, be preferably on the holder network edge in the drying tunnel suitable spring side bumper is set, do not wander off when thin-film carrier is advanced for the carrier that makes film.Film gatherer 6 is the windings up roller by the adjustable speed of torque-motor control, and it regulates the tension force of barrier paper with the carrier winding up roller (1) of being with damping.When the carrier winding up roller is installed, should note with film collecting roller between parallel.Fully sheathed case 8 is to purify air by the thoroughfare, and film is here by airing.Here, the most important thing is air purification.The dried PVA film of band barrier paper should in time pour on the PVA film rolling film roller 7, on and on works to guarantee film formation device, simultaneously the film that takes off from winding up roller is transferred down to technology one.
The main points of film formation device are:
1. the holder net is installed is kept level; 2. vent air must purify through the 1000-10000 level; 3. temperature is adjustable; 4. exhaust air rate is adjustable; 5. thicknesses of layers is controlled; 6. film forming speed is adjustable; 7. operating PVA membrane carrier tension force is adjustable; 8. drying tunnel is closed, and the length more than 60 meters is arranged; 9. when being mounted to film device, should guarantee that film forming does not wander off.1000 millimeters of film forming fabric widths, thicknesses of layers requires to decide according to the specific targets of making polarizing coating, and for example 120 microns, 100 microns, 50 microns.
(3) method of making polarizing coating
Now, do to explain in detail to the technological process of Fig. 2:
The PVA film of the band barrier paper of directly sending here or fetching from PVA film winding up roller from film gatherer 6, through stripping machine 9 the PVA film is peeled, send water temperature to and be 20-50 ℃ water infiltration groove 10, here that top layer, PVA film both sides invasive depth is about 1/3, soak iodine solution groove 11 and prepare for next step enters.The iodine solution prescription, for: iodine/potassium iodide/distilled water=1: 10: 100, temperature are about 30 ℃.Here, the gait of march of film is about 0.3 meter/minute, and soak time is 5-6 minute (typical case's time is 5.4 minutes), if linear velocity is 1 meter/timesharing, soak time then is 2.3 minutes, designs groove width as required, pass through water rinse bath 12 then, temperature 50-60 ℃, add an amount of activating agent, the boric acid liquid bath 13 that enters the band spreading roll again stretches, temperature is 50-60 ℃, and tensile elongation is 4-6 a times of former length, draws to such an extent that long more degree of polarization is high more, but oversize meeting is broken, and the effect of spreading roll is to avoid wrinkling.The borate prescription, for: boric acid/potassium iodide/zinc chloride/distilled water=5: 3.7: 1: 83.Pass through water rinse bath 14 again; dewaterer 15 dehydrations, dryer 16 is air-dry, and (diaphragm commonly used is triacetate cellulose membrane or polyester film to superimposed diaphragm device 17; thickness is the 50-100 micron) and superimposed antiadhesion barrier device 18, be cut into required finished product with cutter 19 according to customer requirements then.
Claims (6)
1, a kind ofly make film, make the continuous producing method of the H type polarizing coating of polarizing coating then, it is characterized by from polyvinyl alcohol (PVA) raw material (17-99):
(1) necessity of raw material is handled
The polyvinyl alcohol (PVA) raw material after adding glycerine, the water logging bubble is stirred into slip;
(2) make polyvinyl alcohol film continuously
Above-mentioned slip is made polyvinyl alcohol film continuously with film formation device;
(3) make polarizing coating continuously
Polyvinyl alcohol film is made polarizing coating through immersion, stretching, oven dry, superimposed;
(4) adopted drawing machine in the described drawing process with the spreading roll that can play wrinkle resistant effect.
2, the continuous producing method of H type polarizing coating according to claim 1 wherein, in the necessary treatment step to raw material, is characterized by and uses distilled water immersion, and changing water to the pH value of water is 7, adds glycerine.
3, the continuous producing method of H type polarizing coating according to claim 1 wherein, in the step of making polyvinyl alcohol film continuously, is characterized by:
(1) the holder net is installed and is kept level; (2) film forming will be carried out in the purification of ventilating air environment of 1000-10000 level; (3) temperature is adjustable; (4) exhaust air rate is adjustable; (5) thicknesses of layers is adjustable; (6) film forming speed is adjustable; (7) operating polyvinyl alcohol film carrier tension force is adjustable; (8) drying tunnel is closed, and length is not less than 60 meters; 9. when being mounted to film device, it is parallel with direct of travel to guarantee into membrane carrier.
4, the continuous producing method of H type polarizing coating according to claim 1 wherein, in the step of making polarizing coating continuously, is characterized by:
(1) immersion of described polyvinyl alcohol film
The polyvinyl alcohol film of remove release paper is successively soaked in water and iodine solution, and the back is cleaned with the water with activating agent;
(2) described stretching, oven dry
With the poly-ethanol film that soaked iodine solution in the boric acid liquid bath of band spreading roll, stretch after washing, dehydration, oven dry, thereby make the polarizing coating basement membrane;
(3) described superimposed
With the polarizing coating basement membrane through superimposed diaphragm, antiadhesion barrier, thereby make H type polarizing coating.
5, the continuous producing method of H type polarizing coating according to claim 1 wherein, in the soaking step of making polarizing coating continuously, is used the iodine solution of prescription for " iodine/potassium iodide/distilled water=1: 10: 100 "; In stretching step, make the polyvinyl alcohol film immersion that the boric acid liquid bath of filling a prescription to " boric acid/potassium iodide/zinc chloride/distilled water=5: 3.7: 1: 83 " is housed and stretch.
6, the continuous producing method of H type polarizing coating according to claim 1 wherein, in the stretching step of making polarizing coating continuously, is characterized in that tensile elongation is 4-6 a times of the former length of basement membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001056697A CN1155839C (en) | 2000-04-17 | 2000-04-17 | Continuous H-type polarization film producing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001056697A CN1155839C (en) | 2000-04-17 | 2000-04-17 | Continuous H-type polarization film producing process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1318755A CN1318755A (en) | 2001-10-24 |
| CN1155839C true CN1155839C (en) | 2004-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001056697A Expired - Fee Related CN1155839C (en) | 2000-04-17 | 2000-04-17 | Continuous H-type polarization film producing process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426020C (en) * | 2004-07-28 | 2008-10-15 | 日东电工株式会社 | Method for manufacturing polarizing film, polarizing film, polarizing plate, optical film and image display device |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100938786B1 (en) * | 2002-12-12 | 2010-01-27 | 스미또모 가가꾸 가부시끼가이샤 | Method for producing polarizing film |
| JP4323269B2 (en) * | 2003-09-10 | 2009-09-02 | 住友化学株式会社 | Manufacturing method of polarizing film |
| US7820080B2 (en) * | 2003-09-29 | 2010-10-26 | Nitto Denko Corporation | Method for producing polarizing film, polarizing film, and image display using the polarizing film |
| CN100351291C (en) * | 2003-12-29 | 2007-11-28 | 日本合成化学工业株式会社 | Polyvinyl alcohol film coil and polarization film prepared therefrom |
| CN102243332A (en) * | 2011-07-01 | 2011-11-16 | 来奇偏光科技（厦门）有限公司 | Polarizing film stretcher |
| JP5616318B2 (en) * | 2011-12-12 | 2014-10-29 | 日東電工株式会社 | Manufacturing method of polarizing film |
| KR101802722B1 (en) * | 2015-05-26 | 2017-11-28 | 스미또모 가가꾸 가부시키가이샤 | Polarizing film production method |
-
2000
- 2000-04-17 CN CNB001056697A patent/CN1155839C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100426020C (en) * | 2004-07-28 | 2008-10-15 | 日东电工株式会社 | Method for manufacturing polarizing film, polarizing film, polarizing plate, optical film and image display device |
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| Publication number | Publication date |
|---|---|
| CN1318755A (en) | 2001-10-24 |
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Granted publication date: 20040630 Termination date: 20100417 |