CN104910424B - A kind of cellulose triacetate thin film - Google Patents
A kind of cellulose triacetate thin film Download PDFInfo
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- CN104910424B CN104910424B CN201510371523.1A CN201510371523A CN104910424B CN 104910424 B CN104910424 B CN 104910424B CN 201510371523 A CN201510371523 A CN 201510371523A CN 104910424 B CN104910424 B CN 104910424B
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Abstract
The present invention relates to a kind of cellulose triacetate thin film, its key component is calculated by weight as：10 parts～30 parts of cellulose triacetate, 50 parts～90 parts of main solvent, cosolvent, 5 parts～25 parts, 0.1 part～2 parts of plasticizer, methanol content 0.1% 2% in cellulose triacetate.The present invention is by selecting the cellulose triacetate containing Trace Methanol so that made by the apparent fisheye quantity of cellulose triacetate thin film substantially reduce, optical characteristics is splendid.
Description
Technical field
The present invention relates to a kind of cellulose triacetate thin film.
Background technology
In recent years constantly in each display device of liquid crystal display of popularization, cellulose triacetate thin film is due to excellent
Different optics, physical characteristic, are widely used in the support and diaphragm of polaroid.
Cellulose triacetate thin film, the cellulose triacetate with partial hydrolysis are dissolved as raw material with mixed solvent
To carry out the preparation of celloidin solution.The celloidin solution curtain coating for preparing forms thickness homogeneous on the stainless steel band for continuously running
Liquid film, liquid film drying, stripping, trimming, embossing, winding obtain cellulose triacetate thin film.
The dissolving quality good or not of celloidin solution determines the apparent mass quality of cellulose triacetate thin film.
The production technology of the cellulose triacetate of raw material partial hydrolysis determines raw material itself containing the residual of 1%-3%
Moisture is stayed, this part residual moisture can play facilitation for the dissolving of raw material cellulose triacetate, but moisture
To final finished film, the apparent mass of -- cellulose triacetate film -- brings strong influence for meeting, especially produces a large amount of fisheye disadvantages
Disease, and then its optical property is affected, so needing to find a kind of method that elimination residual moisture brings fisheye disadvantage.
The content of the invention
The technical problem to be solved in the present invention is for the deficiencies in the prior art, there is provided a kind of cellulose triacetate is thin
Film, can eliminate fisheye disadvantage, with splendid apparent property, optical characteristics.
To solve above-mentioned technical problem, the present invention is adopted the following technical scheme that：
A kind of cellulose triacetate thin film, its key component are calculated by weight as：
10 parts～30 parts of cellulose triacetate
50 parts～90 parts of main solvent
5 parts～25 parts of cosolvent
0.1 part～2 parts of plasticizer
Methanol content 0.1%-2% in cellulose triacetate.
The main solvent is one or more in acetone, dichloromethane or chloroform.
The cosolvent is one or more in methyl alcohol, ethanol, isopropanol or ethyl acetate.
The plasticizer is triphenyl phosphate, phosphoric acid -2- xenyl diphenyls, tricresyl phosphate (xylenols) ester, isophthalic
One or more in diphenol tetraphenyl diphosphonic acid.
Also containing 0.01 part～0.05 part of particle in the component.
The particle is the derivative of silica or silica, titanium oxide, one or more in zirconium oxide.
The particle diameter of the particle is 0.1 μm～1 μm.
Beneficial effect：
The present invention by select the cellulose triacetate containing Trace Methanol so that made by cellulose triacetate it is thin
The apparent fisheye quantity of film is substantially reduced, and optical characteristics is splendid.
Specific embodiment
Cellulose triacetate film of the present invention is prepared by following methods：
1st, the drying and processing of cellulose triacetate
The raw material cellulose triacetate of moisture content 1%-3%, carries out heating, drying, at wind-warm syndrome 50-130 DEG C after process
Cellulose triacetate dry to constant weight.
2nd, the methyl alcohol rewetting of cellulose triacetate
The cellulose triacetate through the process of operation 1 is made to enter in methanol steam, by three acetic acid after processing in operation 1
Cellulose esters carries out rewetting process in methanol steam, makes the cellulose triacetate methanol content after process reach 0.1-2% weights
Amount ratio.
3rd, the dissolving of cellulose triacetate
Cellulose triacetate after operation 2 is processed is added into the mixing containing main solvent, cosolvent and plasticizer
Fully dissolve in solution, make homogeneous celloidin solution.
4th, the addition of particle
Celloidin solution prepared by operation 3 is filtered, and particle is added in the homogeneous celloidin solution after filtration
Mixed.
5th, the flow casting molding of three cellulose acetate membrane
Celloidin solution obtained in operation 4 is processed through deaeration, and Jing curtain coating mouths are cast on the stainless steel band for continuously running, shape
Into the liquid film that thickness is homogeneous, liquid film drying, stripping, trimming, embossing, winding, cellulose triacetate thin film is obtained.
With reference to specific embodiment, the present invention is further illustrated, but the present invention is not limited to this.
Embodiment 1
5 kilograms of cellulose triacetate
Methanol content 0.1% in cellulose triacetate
45 kilograms of main solvent
5 kilograms of cosolvent
0.25 kilogram of plasticizer
Particle（0.8 μm of particle diameter）0.005 kilogram.
By the cellulose triacetate Jing methanol steam rewettings of 5 kilograms of drying so as to which middle methanol content reaches 0.1%, will place
Cellulose triacetate after reason is added to containing 45 kilograms of main solvent, 5 kilograms of cosolvent, and the mixing that 0.25 kilogram of plasticizer is molten
Fully dissolved in agent, dissolution time 5h, prepared homogeneous celloidin solution, celloidin solution after multiple times of filtration, with
0.8 μm of average grain diameter, 0.005 kilogram of particle is mixed, and is processed by deaeration, and Jing curtain coating mouth curtain coatings are continuously running
On stainless steel band, the homogeneous liquid film of thickness is formed, liquid film drying, stripping, trimming, embossing, winding obtain present invention offer
Cellulose triacetate thin film.Celloidin solution property and cellulose triacetate thin film performance test are shown in Table 1.
Embodiment 2
15 kilograms of cellulose triacetate
Methanol content 0.5% in cellulose triacetate
25 kilograms of main solvent
12.5 kilograms of cosolvent
0.05 kilogram of plasticizer
Particle（0.1 μm of particle diameter）0.025 kilogram；
By the cellulose triacetate Jing methanol steam rewettings of 15 kilograms of drying so as to which middle methanol content reaches 0.5%, will
Cellulose triacetate after process is added to containing 25 kilograms of main solvent, 12.5 kilograms of cosolvent, 0.05 kilogram of plasticizer
Fully dissolved in mixed solvent, dissolution time 5h, prepared homogeneous celloidin solution, celloidin solution is through multiple times of filtration
Afterwards, with 0.1 μm of average grain diameter, 0.025 kilogram of particle is mixed, and is processed by deaeration, and Jing curtain coating mouth curtain coatings are continuously being transported
On the stainless steel band for turning, the homogeneous liquid film of thickness is formed, liquid film drying, stripping, trimming, embossing, winding obtain the present invention and carry
For cellulose triacetate thin film.Celloidin solution property and cellulose triacetate thin film performance test are shown in Table 1.
Embodiment 3
10 kilograms of cellulose triacetate
Methanol content 1% in cellulose triacetate
35 kilograms of main solvent
5 kilograms of cosolvent
0.5 kilogram of plasticizer
Particle（1 μm of particle diameter）0.01 kilogram.
By the cellulose triacetate Jing methanol steam rewettings of 10 kilograms of drying so as to which middle methanol content reaches 1%, will place
Cellulose triacetate after reason is added to containing 35 kilograms of main solvent, 5 kilograms of cosolvent, and the mixing that 0.5 kilogram of plasticizer is molten
Fully dissolved in agent, dissolution time 5h, prepared homogeneous celloidin solution, celloidin solution after multiple times of filtration, with
1 μm of average grain diameter, 0.01 kilogram of particle is mixed, and is processed by deaeration, and Jing curtain coating mouth curtain coatings are continuously running not
On rust steel band, the homogeneous liquid film of thickness is formed, liquid film drying, stripping, trimming, embossing, winding obtain the three of present invention offer
Cellulose acetate ester film.Celloidin solution property and cellulose triacetate thin film performance test are shown in Table 1.
Embodiment 4
15 kilograms of cellulose triacetate
Methanol content 1.5% in cellulose triacetate
40 kilograms of main solvent
2.5 kilograms of cosolvent
0.75 kilogram of plasticizer.
By the cellulose triacetate Jing methanol steam rewettings of 15 kilograms of drying so as to which middle methanol content reaches 1.5%, will
Cellulose triacetate after process is added to containing 40 kilograms of main solvent, 2.5 kilograms of cosolvent, 0.75 kilogram of plasticizer it is mixed
Fully dissolved in bonding solvent, dissolution time 5h, prepared homogeneous celloidin solution, celloidin solution is through multiple times of filtration
Afterwards, Jing deaerations are processed, and Jing curtain coating mouths are cast on the stainless steel band for continuously running, and form the homogeneous liquid film of thickness, and liquid film Jing does
Dry, stripping, trimming, embossing, winding, obtain the cellulose triacetate thin film of present invention offer.Celloidin solution property and three vinegar
Acid cellulose ester film performance test is shown in Table 1.
Embodiment 5
10 kilograms of cellulose triacetate
Methanol content 2% in cellulose triacetate
35 kilograms of main solvent
5 kilograms of cosolvent
1 kilogram of plasticizer
Particle（0.6 μm of particle diameter）0.02 kilogram.
By the cellulose triacetate Jing methanol steam rewettings of 10 kilograms of drying so as to which middle methanol content reaches 2%, will place
Cellulose triacetate after reason is added to containing 35 kilograms of main solvent, 5 kilograms of cosolvent, the mixed solvent that 1 kilogram of plasticizer
In fully dissolved, dissolution time 5h prepares homogeneous celloidin solution, and celloidin solution is after multiple times of filtration, and flat
Equal 0.6 μm of particle diameter, 0.02 kilogram of particle is mixed, and is processed by deaeration, and Jing curtain coating mouth curtain coatings are continuously running not
On rust steel band, the homogeneous liquid film of thickness is formed, liquid film drying, stripping, trimming, embossing, winding obtain the three of present invention offer
Cellulose acetate ester film.Celloidin solution property and cellulose triacetate thin film performance test are shown in Table 1.
Comparative example 1
10 kilograms of cellulose triacetate
Water content 2% in cellulose triacetate
Methanol content 0 in cellulose triacetate
35 kilograms of main solvent
5 kilograms of cosolvent
0.25 kilogram of plasticizer
Particle（0.4 μm of particle diameter）0.01 kilogram.
The cellulose triacetate that 10 kilograms of water content are 2% is added to containing 35 kilograms of main solvent, 5 kilograms of cosolvent,
Fully dissolved in the mixed solvent that 0.25 kilogram of plasticizer, dissolution time 5h, prepared homogeneous celloidin solution, celloidin
After multiple times of filtration, with 0.4 μm of average grain diameter, 0.01 kilogram of particle is mixed solution, is processed by deaeration, Jing streams
Yan Zui is cast on the stainless steel band for continuously running, and forms the homogeneous liquid film of thickness, liquid film drying, stripping, trimming, embossing,
Winding, obtains the cellulose triacetate thin film of present invention offer.Celloidin solution property and cellulose triacetate thin film performance
Test is shown in Table 1.
Comparative example 2
15 kilograms of cellulose triacetate
0 kilogram of methanol content in cellulose triacetate
30 kilograms of main solvent
5 kilograms of cosolvent
0.25 kilogram of plasticizer
Particle（0.6 μm of particle diameter）0.005 kilogram.
The cellulose triacetate of 15 kilograms of drying is added to containing 30 kilograms of main solvent, 5 kilograms of cosolvent, plasticizer
Fully dissolved in 0.25 kilogram of mixed solvent, dissolution time 5h, prepared homogeneous celloidin solution, celloidin solution Jing
After crossing multiple times of filtration, with 0.6 μm of average grain diameter, 0.005 kilogram of particle is mixed, and is processed by deaeration, Jing curtain coating mouth streams
Prolong on the stainless steel band for continuously running, form the homogeneous liquid film of thickness, liquid film drying, stripping, trimming, embossing, winding are obtained
To the cellulose triacetate thin film that the present invention is provided.Celloidin solution property and cellulose triacetate thin film performance test are shown in Table
1。
Evaluation method
Celloidin solution property is tested：
One glass of cotton glue is taken with the stainless steel cup of bottom of which has holes, when adding a cover rear de-bubble and finishing, the adhesive tape of glass bottom is taken off, under
A viscosity tube is connect, with the outflow of cotton glue, the number of contained insoluble particles in 100mL celloidins is counted.It is recorded as celloidin quality
（Gel point quantity/100ml）.
Cellulose triacetate thin film performance test：
Full width wide sheet base 1m is taken at random2, with 10cm*10cm scales draw at random 5 it is interval, count this 5 respectively
Fisheye quantity in interval, sums up averagely, is converted to 1 m2Interior fisheye quantity（Individual/m2）.
Light transmittance, mist degree test：
Individual layer chip base transmitance and haze value are tested with haze meter.
1 celloidin quality of table and film performance contrast
。
Claims (7)
1. a kind of cellulose triacetate thin film, its key component are calculated by weight as：
2. cellulose triacetate thin film according to claim 1, is characterized in that, the main solvent be acetone, dichloromethane,
One or more in chloroform.
3. cellulose triacetate thin film according to claim 2, is characterized in that, the cosolvent is methyl alcohol, ethanol, isopropyl
One or more in alcohol, ethyl acetate.
4. cellulose triacetate thin film according to claim 3, is characterized in that, the plasticizer is triphenyl phosphate, phosphorus
One or more in acid -2- xenyl diphenyls, tricresyl phosphate (xylenols) ester, resorcinol tetraphenyldiphosphate.
5. cellulose triacetate thin film according to claim 4, is characterized in that, in the component also containing 0.01 part～
0.05 part of particle.
6. cellulose triacetate thin film according to claim 5, is characterized in that, the particle is silica or titanium dioxide
One or more in the derivative of silicon, titanium oxide, zirconium oxide.
7. cellulose triacetate thin film according to claim 6, is characterized in that, the particle diameter of the particle is 0.1 μm～1 μ
m。
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| CN105093381B (en) * | 2015-09-24 | 2018-05-25 | 深圳市华星光电技术有限公司 | Quantum dot polaroid and preparation method thereof |
| CN108359114B (en) * | 2018-02-28 | 2021-02-23 | 中国乐凯集团有限公司 | Cellulose triacetate film and polarizer |
| CN112795037B (en) * | 2021-01-04 | 2022-10-11 | 湖南科技大学 | Preparation method of enhanced cellulose acetate transparent composite film |
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| JPH0196231A (en) * | 1987-10-08 | 1989-04-14 | Mitsubishi Acetate Co Ltd | Production of formed article of cellulose acetate |
| JP5544269B2 (en) * | 2010-10-13 | 2014-07-09 | 富士フイルム株式会社 | Optical film, polarizing plate and liquid crystal display device |
| CN102925036B (en) * | 2012-11-01 | 2015-07-08 | 昆山乐凯锦富光电科技有限公司 | Coating composition and optical diffusion film |
| CN103467779A (en) * | 2013-09-10 | 2013-12-25 | 中国乐凯集团有限公司 | Cellulose triacetate membrane |
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Effective date of registration: 20220225 Address after: 223800 100 meters south of the intersection of Yongjin road and Kexing Road, development zone, Sucheng District, Suqian City, Jiangsu Province Patentee after: Photoelectric materials Co.,Ltd. Address before: 071054, 6 Kennan Avenue, Baoding, Hebei Patentee before: CHINA LUCKY Group Corp. |