CN1971362A - Film and its manufacturing method - Google Patents
Film and its manufacturing method Download PDFInfo
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- CN1971362A CN1971362A CN 200510126741 CN200510126741A CN1971362A CN 1971362 A CN1971362 A CN 1971362A CN 200510126741 CN200510126741 CN 200510126741 CN 200510126741 A CN200510126741 A CN 200510126741A CN 1971362 A CN1971362 A CN 1971362A
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Abstract
The invention provides a film that can be produced by the following method: the film with hydroxyl on surface is placed in the flume which contains the dicarboxylic acid, and then the film is stretched.
Description
Technical field
The present invention relates to a kind of film, particularly relate to a kind of slim light polarizing film and manufacture method thereof.
Background technology
In recent years, because liquid crystal indicator is widely used in for example electronic products such as word processor, screen, mobile phone or LCD TV, make the demand of associated component such as light polarizing film increase day by day, particularly, after the home audio-visual amusement equipment universalness, brought up large scale liquid crystal development of television trend, therefore, the light polarizing film of the slim and large tracts of land scope of necessary accelerate development is to meet the need of market.
At present, the polyvinyl alcohol (PVA) light polarizing film roughly is divided into three major types, and the first kind is the polyvinyl alcohol film that contains iodine, and second class is for containing the polyvinyl alcohol film of bitintability dyestuff (dichroic dye), and the 3rd class then is the polyvinyl alcohol film through partial dehydration.
The above-mentioned polyvinyl alcohol film that contains iodine becomes the highest light polarizing film of present utilization rate then because processing procedure is simple and have better optical characteristics.In general; Polarizer for example is triacetate fiber (triacetyl cellulose by the polyvinyl alcohol film that extends with one deck at least; TAC) protective seam is formed; polyvinyl alcohol (PVA) film thickness after wherein extending, dyeing is about 20～35 microns; extension ratio (stretching ratio) is about 5～6, and modal is 5.8 times.Yet the light polarizing film that these are thicker, width is narrow and extension ratio is low greatly reduces the availability of material, does not meet cost consideration, in addition have stretch before and after the light polarizing film width take place than situation up to 2～2.5, can't satisfy the demand of large size panel fully.
How prior art increases the optical characteristics of film or utilizes dry process to increase the method (United States Patent (USP) the 6th, 760,156 and 6,855, No. 276) of its uniformity coefficient if having disclosed, its extension ratio can reach 5～7.Yet rare at the discussion that how to increase light polarizing film extension ratio, width or reduction thickness, therefore, the necessary development a kind of method that can reach reduction thickness simultaneously, increase extension ratio and width, to improve stock utilization.
Summary of the invention
In view of this, the invention provides a kind of manufacture method of film, comprising: the film that the surface is had hydroxyl places the tank that contains dicarboxylic acid (dicarboxylic acid) and stretches it.
It is a kind of by the prepared film of said method that the present invention provides in addition.
For above-mentioned purpose of the present invention and feature can be become apparent more,, and in conjunction with the accompanying drawings, be described in detail below hereinafter especially exemplified by preferred embodiment.
Description of drawings
Fig. 1 is the bond situation of the boric acid of dicarboxylic acid of the present invention and prior art on the polyvinyl alcohol film surface.
Fig. 2 is the Polarizer that the embodiment of the invention 4 is made, the result of its thermo-mechanical analysis.
Fig. 3～4 are the extension path of light polarizing film of the present invention in extension slot.
Embodiment
The invention provides a kind of film, it is made by following method: the film that the surface is had hydroxyl places the tank that contains dicarboxylic acid and stretches it.
The film that described surface has hydroxyl can be polyvinyl alcohol film.
The step that the present invention makes film also comprises carries out swelling and dyeing is handled to film.During dyeing, can dye by the Biodine that comprises iodine molecule and iodide ion, wherein between 0.01～0.1%, the percentage by weight of iodide ion is substantially between 0.1～10% substantially for the percentage by weight of iodine molecule.
Above-mentioned dicarboxylic acid can be the dicarboxylic acid of carbon number 4～6, hexane diacid (adipic acid) for example, and its percentage by weight in tank (extension slot) soup between 1～10%, is preferably between 2～5% substantially.Comprise also in the extension slot and add for example transition metal ion, hydrochloric acid, sulfuric acid or the boric acid of zinc ion that wherein between 0.1～3%, the percentage by weight of boric acid is substantially between 1～3% substantially for the percentage by weight of transition metal ion.The operating temperature of extension slot is controlled between 40～60 degree Celsius substantially.
The present invention replaces prior art with dicarboxylic acid boric acid as with the molecule (seeing also Fig. 1) of the surperficial bond of polyvinyl alcohol film, because the acidic group end of dicarboxylic acid possess hydrophilic property, then be easy to form the ester bond bond with the hydroxyl on polyvinyl alcohol film surface, and the skeleton of its long carbochain (4～6 carbon) is spatially rotatable, crooked, with can't compare by crooked boric acid in the prior art, more can increase the toughness and the ductility of integral material, make its unlikely fracture easily in drawing process, help the thinner light polarizing film of output.In addition, for the tensile property that improves chemical reactivity, film and prevent to fade, the present invention also adds other for example adjuvant of transition metal ion, strong acid or boric acid etc. in extension slot.
The present invention is by Change Example such as operating temperature, the extension slot parameter of wearing clip wheel rotating speed in film path, the groove, dicarboxylic acid concentration or additive concentration etc., and obtains thin thickness, width is wide and extension ratio is high light polarizing film.
The present invention after light polarizing film is finished making, also can comprise fit at least one deck for example for triacetate fiber (triacetyl cellulose, TAC), polyester (polyester, PET) or the blooming of poly-bornylene (polynorbornene) on this light polarizing film.
The present invention provides in addition that a kind of it can be applicable to various LCD by the prepared film of said method, for example can be applicable in the screen display of vehicle GPS system.
Light polarizing film behind the drawn of the present invention, its extension ratio (stretching ratio) is substantially between 6～9, between 10～20 microns, the thickness ratio cardinal principle of the front and back that stretch is between 4～8, and the ratio of the width before and after stretching cardinal principle is between 1.5～2 substantially for thickness.
Below illustrate further feature of the present invention and advantage by several embodiment.
Embodiment
Embodiment 1
Place tank to carry out swelling the polyvinyl alcohol film of 650 millimeters of width, 75 microns of thickness, then, with Biodine polyvinyl alcohol film is dyeed, afterwards, as shown in Figure 3, place the extension slot 10 that contains 3% hexane diacid, 1% boric acid and 0.15% zinc ion to stretch polyvinyl alcohol film 30, with the polyvinyl alcohol (PVA) light polarizing film that completes and extend.The rotating ratio of the three pairs of clip wheels (nip roller) 20 in this extension slot 10 was respectively 1: 1.5: 1.55, and the extension path of light polarizing film 30 in groove as shown in the figure.Groove in-draw temperature is 53 degree Celsius.At last, drawn, dried light polarizing film, its extension ratio is 7.24, and thickness is 12 microns, and width is 380 millimeters.
Embodiment 2
Place tank to carry out swelling the polyvinyl alcohol film of 650 millimeters of width, 75 microns of thickness, then, with Biodine polyvinyl alcohol film is dyeed, afterwards, as shown in Figure 3, place the extension slot 10 that contains 3% hexane diacid, 1% boric acid and 0.15% zinc ion to stretch polyvinyl alcohol film 30, with the polyvinyl alcohol (PVA) light polarizing film that completes and extend.The rotating ratio of the three pairs of clip wheels (nip roller) 20 in this extension slot 10 was respectively 1: 1.45: 1.5, and the extension path of light polarizing film 30 in groove as shown in the figure.Groove in-draw temperature is 53 degree Celsius.At last, drawn, dried light polarizing film, its extension ratio is 6.77, and thickness is 17 microns, and width is 342 millimeters.
Embodiment 3
Place tank to carry out swelling the polyvinyl alcohol film of 650 millimeters of width, 75 microns of thickness, then, with Biodine polyvinyl alcohol film is dyeed, afterwards, as shown in Figure 4, place the extension slot 40 that contains 3% hexane diacid, 1% boric acid and 0.15% zinc ion to stretch polyvinyl alcohol film 60, with the polyvinyl alcohol (PVA) light polarizing film that completes and extend.The rotating ratio of the three pairs of clip wheels (nip roller) 50 in this extension slot 40 was respectively 1: 1.5: 1.5, and the extension path of light polarizing film 60 in groove as shown in the figure.Groove in-draw temperature is 53 degree Celsius.At last, drawn, dried light polarizing film, its extension ratio is 7.00, and thickness is 11.5 microns, and width is 418 millimeters.
Embodiment 4
Place tank to carry out swelling the polyvinyl alcohol film of 650 millimeters of width, 75 microns of thickness, then, with Biodine polyvinyl alcohol film is dyeed, afterwards, as shown in Figure 4, place the extension slot 40 that contains 3% hexane diacid, 1% boric acid and 0.15% zinc ion to stretch polyvinyl alcohol film 60, with the polyvinyl alcohol (PVA) light polarizing film that completes and extend.The rotating ratio of the three pairs of clip wheels (nip roller) 50 in this extension slot 40 was respectively 1: 1.45: 1.5, and the extension path of light polarizing film 60 in groove as shown in the figure.At last, drawn, dried light polarizing film, its extension ratio is 6.77, and thickness is 14.5 microns, and width is 385 millimeters.
This light polarizing film further with etching after two-layer TAC film paste and be incorporated in 70 degree Celsius and become Polarizer after the oven dry down, then, carry out thermo-mechanical analysis (thermal mechanical analysis, test condition be Celsius 90 the degree, 30 minutes), found that, Polarizer amount of contraction (contraction quantity) is 47.93 microns (seeing also Fig. 2), far below the present measured value of like product (90～110 microns) on the market.
Comparing embodiment
Place tank to carry out swelling the polyvinyl alcohol film of 650 millimeters of width, 75 microns of thickness, then, polyvinyl alcohol film is dyeed, afterwards with Biodine, place the extension slot that contains 5% boric acid to stretch polyvinyl alcohol film, with the polyvinyl alcohol (PVA) light polarizing film that completes and extend.The rotating ratio of the three pairs of clip wheels (nip roller) in this extension slot was respectively 1: 1.4: 1.33, and groove in-draw temperature is 53 degree Celsius.At last, drawn, dried light polarizing film, its extension ratio is 5.8, and thickness is 24 microns, and width is 340 millimeters.
Below the width of light polarizing film before and after the thickness before and after extension ratio, thickness, width, the stretching when stretches of making for embodiment 1～4 and comparing embodiment than on diversity ratio, as shown in Table 1.
Table one
| Extension ratio | Thickness (micron) | Width (centimetre) | Thickness ratio before and after stretching | Width ratio before and after stretching | |
| Embodiment 1 | ?7.24 | ?12.0 | ?380 | ?6.25 | ?1.72 |
| Embodiment 2 | ?6.77 | ?17.0 | ?342 | ?4.41 | ?1.89 |
| Embodiment 3 | ?7.00 | ?11.5 | ?418 | ?6.52 | ?1.56 |
| Embodiment 4 | ?6.77 | ?14.5 | ?385 | ?5.17 | ?1.69 |
| Comparing embodiment | ?5.80 | ?24.0 | ?340 | ?3.13 | ?1.91 |
Can find out by table one, light polarizing film of the present invention has the extension ratio higher than prior art, can be controlled in behind its thickness drawn and be lower than below 20 microns, and width can not reduce significantly because of length stretches, therefore, that manufacturing method according to the invention can obtain to approach and extend the big light polarizing film of area, improved the utilization factor of material greatly.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; should do various changes and retouching, so protection scope of the present invention should be as the criterion with appended claims institute restricted portion.
Claims (17)
1. the manufacture method of a film comprises that the film that the surface is had a hydroxyl places the tank that contains dicarboxylic acid and stretches it.
2. the manufacture method of film as claimed in claim 1 comprises that also described film is carried out swelling to be handled.
3. the manufacture method of film as claimed in claim 1 also comprises with Biodine described film is dyeed.
4. the manufacture method of film as claimed in claim 3, wherein said Biodine is the aqueous solution that comprises iodine molecule and iodide ion.
5. the manufacture method of film as claimed in claim 4, the percentage by weight of wherein said iodine molecule are substantially between 0.01～0.1%.
6. the manufacture method of film as claimed in claim 4, the percentage by weight of wherein said iodide ion are substantially between 0.1～10%.
7. the manufacture method of film as claimed in claim 1, the carbon number of wherein said dicarboxylic acid is 4～6.
8. the manufacture method of film as claimed in claim 1, wherein said dicarboxylic acid is a hexane diacid.
9. the manufacture method of film as claimed in claim 1, the percentage by weight of wherein said dicarboxylic acid are substantially between 1～10%.
10. the manufacture method of film as claimed in claim 1, the percentage by weight of wherein said dicarboxylic acid are substantially between 2～5%.
11. the manufacture method of film as claimed in claim 1 also is included in and adds transition metal ion, hydrochloric acid, sulfuric acid or boric acid in the described tank.
12. the manufacture method of film as claimed in claim 11, wherein said transition metal ion comprises zinc ion.
13. the manufacture method of film as claimed in claim 11, the percentage by weight of wherein said transition metal ion are substantially between 0.1～3%.
14. the manufacture method of film as claimed in claim 11, the percentage by weight of wherein said boric acid are substantially between 1～3%.
15. the manufacture method of film as claimed in claim 1, the operating temperature of wherein said tank are substantially between 40～60 degree Celsius.
16. the manufacture method of film as claimed in claim 1 also is included in the layer protecting film at least of fitting on the described film.
17. the manufacture method of film as claimed in claim 3, wherein said film are the polyvinyl alcohol (PVA) light polarizing film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101267415A CN100507668C (en) | 2005-11-21 | 2005-11-21 | Film and its manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101267415A CN100507668C (en) | 2005-11-21 | 2005-11-21 | Film and its manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1971362A true CN1971362A (en) | 2007-05-30 |
| CN100507668C CN100507668C (en) | 2009-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101267415A Expired - Fee Related CN100507668C (en) | 2005-11-21 | 2005-11-21 | Film and its manufacturing method |
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| CN (1) | CN100507668C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824073A (en) * | 2015-01-27 | 2016-08-03 | Lg化学株式会社 | Method for manufacturing polarizing plate and polarizing plate manufactured by the same |
| US10114159B2 (en) | 2015-01-27 | 2018-10-30 | Lg Chem, Ltd. | Method for manufacturing polarizer and polarizer manufactured by the same |
-
2005
- 2005-11-21 CN CNB2005101267415A patent/CN100507668C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105824073A (en) * | 2015-01-27 | 2016-08-03 | Lg化学株式会社 | Method for manufacturing polarizing plate and polarizing plate manufactured by the same |
| US10114159B2 (en) | 2015-01-27 | 2018-10-30 | Lg Chem, Ltd. | Method for manufacturing polarizer and polarizer manufactured by the same |
| US11314006B2 (en) | 2015-01-27 | 2022-04-26 | Lg Chem, Ltd. | Method for manufacturing polarizer and polarizer manufactured by the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100507668C (en) | 2009-07-01 |
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