CN107216585A - A kind of polyethenol series optical film and preparation method thereof - Google Patents
A kind of polyethenol series optical film and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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Abstract
The present invention relates to a kind of composition of high-molecular compound, specifically related to a kind of polyethenol series optical film, the preparing raw material of the optical film includes vinol series polymer, water, plasticizer, surfactant and antioxidant, 1 square centimeter of diaphragm is taken in the optional position of optical film, its reclaimed water, plasticizer, the maximum level difference of surfactant and antioxidant are less than 1.2%.The stretching uniformity of the optical film of scheme is good, and the polaroid color spot produced using the optical film is few.The present invention also provides a kind of method for preparing above-mentioned optical film, and the preparation method of this method is simple, the excellent performance of the polyethenol series optical film prepared.
Description
Technical field
The present invention relates to a kind of composition of high-molecular compound, and in particular to a kind of polyethenol series optical film and its system
Preparation Method.
Background technology
Liquid crystal display (LCD) with the advantages of its frivolous, low-power consumption, radiationless, image stabilization, easy large-area displays progressively
It instead of traditional cathode-ray picture tube (CRT), the main product as information age terminal display.Polyethenol series
(PVA) optical film is core component --- the important source material of polaroid for making liquid crystal display (LCD), is that PVA downstreams are high-end
One of application field.Polaroid is the key component of liquid crystal panel, and main function is that natural light is converted into polarised light.With
LCD application fields are from initial calculator, instrumentation, various polarizing microscopes, sunglasses, anti-glare eye protector, auto bulb
The miniature instruments such as anti-dazzle apparatus develop into current mobile phone, flat board, computer, LCD TV, color liquid crystal projecting apparatus, liquid crystal prison
Visual organ, video camera, onboard navigation system etc., application constantly expands, in particular with liquid crystal display large scale demand
It is fast-developing, it is desirable to the excellent polyethenol series optical film of tensile property, dyeability and the good polarisation of the few optical property of color spot
Piece.
The requirement of polyethenol series optical film has excellent optical homogeneity, so that being provided for downstream polaroid user has
Superior tensile and the former film of the optical film of dyeability, are reduced or avoided the optical defect point brought by stretching.Patent publication No.
To disclose the polyvinyl alcohol film in a kind of polyvinyl alcohol film, the program in CN102816339A patent document
It is as the polyvinyl alcohol film made by the film stoste containing vinol series polymer and plasticizer, in the TD of the film
In direction, (Ry) poor relative to the maximum level of the average value of the plasticizer loading contained by film is less than 2%, and plasticizer contains
Measure the variation on TD directions and form the equispaced (Sm) of bumps for more than 5cm.Actually in the manufacturing process of optical film,
When controlling the optical film prepared by above-mentioned condition, the stretching uniformity of optical film is not good enough, and the used time is when polaroid is prepared, partially
Some color spots are there is also on mating plate.
The content of the invention
It is an object of the invention to provide a kind of polyethenol series optical film and preparation method thereof, the optical film of this programme
Stretching uniformity is good, and during using optics film preparation polaroid of the invention, polaroid is substantially not present color spot.
To reach above-mentioned purpose, base case of the invention is as follows：
A kind of polyethenol series optical film, the preparing raw material of the optical film includes vinol series polymer, water, plasticising
Agent, surfactant, releasing agent and antioxidant, 1 square centimeter of diaphragm is taken in the optional position of optical film, its reclaimed water, plasticising
The maximum level difference of agent, surfactant and antioxidant is less than 1.2%.
This programme has the following advantages that：Inventor has found in experiment and use, when in any of polyvinyl alcohol optical film
Position takes 1 square centimeter of diaphragm, and the poor satisfaction of its reclaimed water, plasticizer, the maximum level of surfactant and antioxidant is less than
When 1.2%, the integrally stretching performance of optical film is very good, and the stretching in drawing process everywhere is highly uniform, and dyeing is equal
Even, manufactured polaroid is substantially not present color spot, and the quality of the polyethenol series optical film of gained is good.
Further, the maximum level difference of the water is less than 0.5%, the maximum of plasticizer, surfactant and antioxidant
Content difference is respectively less than 0.7%.Inventor is found by experiment that, when water, plasticizer, surfactant, releasing agent and antioxidant
When content difference meets above-mentioned condition, the overall performance (tensile property is good and color spot is few) of the optical film obtained by preparation is overall optimal.
The present invention also provides a kind of preparation method of polyethenol series optical film, comprises the following steps：
(1) polyvinyl alcohol through alcoholysis, washing is aided with addition water, plasticizer, surface work again in double screw extruder
Property agent, releasing agent and antioxidant mixing, plasticizing, deaeration obtain film stoste；
(2) it is casting film-forming on 2-6 meters of casting roller in width；
(3) moisture is removed on many dryer rolls, and subsequently enters and continue drying in air-floatation type oven；
(4) traction winding and packaging, drawing tension ＜ 200N.
Had the following advantages that using the preparation method of the present invention：1st, using through further complete alcoholysis, carrying out washing treatment it is poly-
The tensile property and dyeability for the polyethenol series optical film that ethene raw polyol is prepared are good, as inclined obtained by the film
The few optics of mating plate color spot can be good；2nd, it is empty by equally distributed heat when polyethenol series optical film is dried in air-floatation type oven
Air-flow guide rail, film energy even suspension is not contacted in baking oven with any surface, it is ensured that film top and bottom are without any cut, tool
There is excellent surface cleanliness, film will not substantially be influenceed by uneven tension force, in air-floatation type oven drying process,
The adjustment of Film Optics uniformity can also be realized, the optical homogeneity of film is so ensured that.
Further, alcoholysis again is carried out to vinol series polymer at 25-45 DEG C using NaOH solution in step (1),
Alcoholysis degree is set to stably reach more than 99.5%.When alcoholysis degree within the above range when, can guarantee that the light of the optical film prepared
Learn performance and degree of polarization is good.
Further, the polyvinyl alcohol after alcoholysis again is washed so that sodium acetate content is down to less than 0.02%,
Content of ashes is less than 50ppm.The inventor of this programme has found that the content of sodium acetate content and ash content is upper in experiment and use
When in the range of stating, the draftability uniformity of obtained polyethenol series optical film is good.
Further, curtain coating roller temperature is 70-95 DEG C in step (2), by polyvinyl alcohol film stoste curtain coating at 80-95 DEG C
On casting roller.The inventor of this programme has found, the temperature of casting roller within the above range when, be cast the thin film stability formed
It is good.When film stoste containing polyvinyl alcohol is cast, temperature is less than 80 DEG C, and the thickness that moisture evaporation speed is slowly not easy to film is equal
It is even, influence Film Optics performance；Temperature is higher than 95 DEG C, and polyethenol series optical film is easily dehydrated flavescence, and then influences film
Form and aspect.
Further, in step (2), the polyethenol series optical film in the fabrication process, after casting roller from roller
The water content of film is less than 35%.When film presses above-mentioned setting from roller water content, film has certain intensity, and viscosity is small, holds
Easily peeled off from from the roll surface of casting roller, and the surface damage of film will not be caused.
Embodiment
Below by embodiment, the present invention is further detailed explanation：
Below to raw material from being illustrated, and describe in detail by taking embodiment 1 as an example polyethenol series optical film and its
Preparation method, other embodiment only shows in place of the difference with embodiment 1 that other are unshowned same as Example 1.
Polyethenol series optical film of the present invention is to the polyvinyl alcohol tree containing post-treated (alcoholysis and washing are purified again)
The polyethenol series optical film that the material of preparing of fat is filmed.
As polyvinyl alcohol resin, usually using unmodified polyethylene alcohol system's resin or modified polyvinylalcohol system resin,
That is, vinyl esters is carried out to the polyvinyl ester of solution copolymerization acquisition by polymerisation in solution or vinyl esters with other modified monomers
Resin obtains polyvinyl alcohol resin by alcoholysis, crushing, squeezing.As composition that can be with vinyl esters combined polymerization, for example may be used
It is enumerated as undersaturated carboxylic acid or derivatives thereof, unsaturated sulfonic acid or its derivative, vinyl ethers, carbon number 2-30 a-
Alkene etc..
Above-mentioned vinyl esters is used during manufacture polyvinyl ester, for example, can be enumerated as：Vinylacetate, vinyl formate
Ester, vinyl laurate, propionate, vinyl butyrate, vinyl pivalate, tertiary ethylene carbonate, stearic acid second
Alkene ester, vinyl benzoate etc..This vinyl acetate can be above-mentioned one or two kinds of or two or more composition therein,
For the present invention, preferred vinylacetate.
In addition, monomer that can be with the vinyl esters combined polymerization, such as can be enumerated as：Ethene, propylene, 1- butylene, isobutene
Deng the olefines that carbon number is 2-30；Acrylic acid and its salt, methyl acrylate, ethyl acrylate, n-butyl acrylate, propylene
The acrylic acid such as sour isobutyl ester, tert-butyl acrylate, 2-EHA, lauryl ester, octadecyl ester
Class (such as acrylic acid-C1-18 alkyl esters)；Methacrylic acid and its salt, methyl methacrylate, EMA, methyl
N-propyl, isopropyl methacrylate, n-BMA, Isobutyl methacrylate, methacrylic acid uncle
The methacrylates such as butyl ester, 2-Ethylhexyl Methacrylate, lauryl ester, methacrylic acid octadecane ester
Class (such as methacrylic acid-C1-18 alkyl esters)；Acrylamide, N methacrylamide, N- ethyl acrylamides, N, N- diformazan
Base acrylamide, diacetone acrylamide, acrylamide propane sulfonic and its salt, acrylamide propyl dimethylamine and its salt, N-
The acrylamide derivative such as NMA and its derivative；Methacrylamide, N methacrylamide, N- methyl first
Base acrylamide, N- ethyl methacrylamides, Methacrylamide propane sulfonic acid and its salt, Methacrylamide dimethylamine
The methacrylamide derivatives such as amine and its salt, N- methylol methacrylamides and its derivative, N- vinyl formamides,
The N- vinylamide classes of N- vinyl acetamides, NVP etc.；Ethylene methacrylic ether, ethyl vinyl ether, positive third
Base vinethene, isopropyl-ethylene ether, n-butyl vinyl ether, isobutylvinyl ether, tert-butyl vinyl ether, dodecyl vinyl ether,
The ethene ethers such as stearyl vinethene；The nitriles such as acrylonitrile, methacrylonitrile；Chlorinated ethylene, chlorination time vinyl, fluorination second
The ethylene halide base class such as alkenyl, fluorination time vinyl；The allyl compounds such as acetic acid pi-allyl, chlorination pi-allyl；Maleic acid, clothing
The derivative such as the unsaturated carboxylic acids such as health acid and its salt or its ester；The vinyl silyl groups chemical combination such as vinyltrimethoxy silane
Thing；Isopropyl acetate；The above-mentioned preferred a- alkene of copolymerization monomer, particularly preferred ethene.
It is above-mentioned to be preferably shorter than 10% with the consumption of the monomer of vinyl esters combined polymerization by mole percent, more preferably
Less than 5%.
The average alcoholysis degree of polyvinyl alcohol resin used in the present invention is usually more than 97mol%, particularly preferably
More than 99mol%, still more preferably more than 99.5mol%.When alcoholysis degree is less than 97mol%, the optics film properties of film
Have the tendency of with the degree of polarization of the polaroid as made from the film insufficient.The preferred 1500- of the degree of polymerization of used polyvinyl alcohol
8000, more preferably 1700-3500, particularly preferred 2000-3000, when too low, the mechanical strength of film has a declining tendency, mistake
Gao Shi, the productivity of polyvinyl alcohol resin declines.
Here, " alcoholysis degree " of this specification, is determined in the method described in " GB12010.5-89 is provided ", this theory
" average polymer " of bright book refers to what is determined on the basis of " GB12010.9 regulations ".
Polyethenol series material of preparing of the present invention is by through above-mentioned vinyl esters polymerization, alcoholysis, crushing, squeezing or acquisition
Aqueous polyvinyl alcohol resin is obtained by post processing (further alcoholysis and washing are purified) again.
When preparing optical film using the purifying polyvinyl alcohol resin of above-mentioned complete alcoholysis type, mixture increases in film stoste
Mould the manufacture of the auxiliary agents such as agent, surfactant, releasing agent and antioxidant.
Above-mentioned plasticizer can effectively improve the extension property of film when preparing polarizer, usually polyhydroxy-alcohol, can arrange
Lift as glycerols, ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, third such as glycerine, two glycerine, triglycerins
The aklylene glycol such as glycol, DPG, polypropylene glycol class or polyalkylene glycols, trimethylolpropane etc..These plasticising
Agent can be used alone and can also combine two or more and use.Preferably glycerine in the extensibility present invention to ensure film.
The content of above-mentioned plasticizer, relative to the mass parts of polyvinyl alcohol resin 100, preferred 5-25 mass parts, further
It is preferred that 9-18 mass parts.When content is very few, there is extensibility decline when polaroid is made, when excessive, acquisition it is poly-
The stability of ethenol system optical film has a declining tendency.
Generally, adhesion is acted on when surfactant has suppression film curling, and for example can be used alone anion surface active
Nonionic surfactant is used alone in agent, also can be combined and uses.
The surfactant can be enumerated as：The sulfuric acid ester types such as the carboxylic acid types such as potassium laurate, octyl salicylate, dodecane
The sulphonic acids such as base benzene sulfonate, can also be enumerated as the alkyl such as alkane ether type, the polyoxyethylene octyl phenylates such as the oily ether of polyethylene glycol oxide
The polypropylene glycol ether type of alkyl ester type, the polyethylene glycol oxide PPOXs such as the yellow ethene laurate of phenylate type, polyoxy etc., oleic acid diethyl
Alkanolamide type, polyoxyalkylene allyl benzene ether type of alkylolamides etc. etc..
The content of the surfactant, relative to the mass parts of polyvinyl alcohol resin 100, preferably 0.001-1 mass parts,
More preferably 0.005-0.1 mass parts.It is difficult to play a part of resist blocking and that and the peptizaiton of dyestuff when too low, film when excessive
The transparency declines.
In addition, generally using antioxidant during above-mentioned film to improve the yellowing-resistant and storage stability of film, antioxidant can
To be the arbitrary antioxidant such as phenol system antioxidant, BHT, 2,2- di-2-ethylhexylphosphine oxides (4- methyl-6-tert butyl
Phenol), four [3- (hydroxyphenyl of 3,5- di-t-butyls -4) propionic acid] quaternary amyl alcohol esters, three (2,4- di-tert-butyl-phenyls) phosphite esters,
Phosphorous acid three (2,4- di-tert-butyl-phenyl) ester etc., preferably latter two or latter three kinds of composition.Consumption is polyethenol series
The 5-50ppm of resin.
Embodiment 1
Present embodiment discloses a kind of polyethenol series optical film, the preparing raw material of the optical film includes polyethenol series
Polymer, water, plasticizer, surfactant and antioxidant, 1 square centimeter of diaphragm is taken in the optional position of optical film, wherein
Water, plasticizer, the maximum level difference of surfactant and antioxidant are 1.1%.
Originally the method for additionally providing and preparing above-mentioned polyethenol series optical film is implemented, is comprised the following steps：
(1) polyvinyl alcohol through alcoholysis again, washing is aided with addition water, plasticizer, surface again in double screw extruder
Activating agent and antioxidant are mixed, plastified, deaeration；Vinol series polymer is carried out at 25-45 DEG C using NaOH solution
Alcoholysis again, makes alcoholysis degree stably reach more than 99.5%, then vinol series polymer is washed so that sodium acetate contains
Amount is down to less than 0.02%, and content of ashes is less than 50ppm；
(2) it is casting film-forming on 2-6 meters of casting roller in width, curtain coating roller temperature used is 70-95 DEG C, at 80-95 DEG C
Film stoste containing PVA is cast on casting roller, and controls film to be less than 35% from roller water content after casting roller；
(3) moisture is removed on many dryer rolls, and subsequently enters and continue drying in air-floatation type oven；
(4) traction winding and packaging, drawing tension ＜ 200N.
The method of testing of water, plasticizer, surfactant and antioxidant content in film of the present invention：It is any to choose film
Upper multiple 1 square centimeter region diaphragm, film is heated in pure water fully dissolving, the aqueous solution of 1-2% concentration is made.Will
The solution dissolved is fitted into bag filter, and the maximum molecular weight interception capacity of bag filter is 10,000, and dialysis enough for a long time, will be small
Molecular compound is dialysed away, left in bag for polyvinyl alcohol polymer.Collected polymer, thoroughly dries, weighs, gathered
Compound content, then water, plasticizer, the content of surfactant and antioxidant can be calculated and obtained.
The poor use of the present embodiment reclaimed water, plasticizer, the maximum level of surfactant and antioxidant is in any of optical film
Position takes 1 square centimeter of diaphragm, and quantity of sampling quantity is 10 groups, the water tested respectively in 10 groups of diaphragms, plasticizer, surface-active
Agent and antioxidant content, and calculate content difference.
Embodiment 2
The present embodiment in place of the difference of embodiment 1 with being：The maximum level difference of the water is controlled to be less than 0.5%, plasticising
The maximum level difference of agent, surfactant and antioxidant is less than 0.7%.
Embodiment 3
The present embodiment in place of the difference of embodiment 1 with being：In the present embodiment, the water, plasticizer, surface-active are controlled
The maximum level difference of agent and antioxidant is 0.8%.
Embodiment 4
The present embodiment in place of the difference of embodiment 1 with being：In the present embodiment, the water, plasticizer, surface-active are controlled
The maximum level difference of agent and antioxidant is 0.6%.
Embodiment 5
The present embodiment in place of the difference of embodiment 1 with being：In the present embodiment, the water, plasticizer, surface-active are controlled
The maximum level difference of agent and antioxidant is 0.4%.
Embodiment 6
The present embodiment in place of the difference of embodiment 1 with being：In the present embodiment, the water, plasticizer, surface-active are controlled
The maximum level difference of agent and antioxidant is 0.2%.
Embodiment 7
The present embodiment in place of the difference of embodiment 1 with being：In the present embodiment, the water, plasticizer, surface-active are controlled
The maximum level difference of agent and antioxidant is 0.1%.
Comparative example 1
Comparative example 1 in place of the difference of embodiment 1 with being：In comparative example 1, the water, plasticizer, surfactant are controlled
Maximum level difference with antioxidant is 1.3%.
Comparative example 2
Comparative example 1 in place of the difference of embodiment 1 with being：In comparative example 1, the water, plasticizer, surfactant are controlled
Maximum level difference with antioxidant is 1.5%.
Comparative example 3
Comparative example 1 in place of the difference of embodiment 1 with being：In comparative example 1, the water, plasticizer, surfactant are controlled
Maximum level difference with antioxidant is 1.7%.
Comparative example 4
Comparative example 1 in place of the difference of embodiment 1 with being：In comparative example 1, the water, plasticizer, surfactant are controlled
Maximum level difference with antioxidant is 1.9%.
Comparative example 5
Comparative example 5 in place of the difference of embodiment 1 with being：In comparative example 5, cancel following process step, it is molten using NaOH
Liquid carries out alcoholysis again at 25-45 DEG C to vinol series polymer, alcoholysis degree is stably reached more than 99.5%.
Comparative example 6
Comparative example 6 in place of the difference of embodiment 1 with being：In comparative example 6, cancel following process step, to polyvinyl alcohol
Based polymer is washed so that sodium acetate content is down to less than 0.02%, and content of ashes is less than 50ppm.
The optics film preparation polaroid prepared in above-described embodiment 1-7, comparative example 1-6 is detected respectively, and counts above-mentioned
Polaroid is in 1m2In the range of color spot quantity, color spot, and the stretching uniformity for representing films is poorer, the result of resulting detection
Such as table 1 below, table 2：
Table 1
Table 2
Contrast the color spot quantity in embodiment 1-7 on every square metre of polaroid in the testing result in Tables 1 and 2, table 1
Color spot quantity in comparative example 1-4 considerably less than in table 2 on every square metre of polaroid.It can thus be seen that control optics
The optional position water of film, plasticizer, surfactant and antioxidant maximum level it is poor, can largely influence optical film
Uniformity is stretched, color spot is few when obtained optical film is used to prepare polaroid.The optional position of present invention control optical film takes 1 flat
Square centimetre of diaphragm, its reclaimed water, plasticizer, the maximum level difference of surfactant and antioxidant are less than 1.2%.Preferably water
Maximum level difference is less than 0.5%, and the maximum level difference of plasticizer, surfactant and antioxidant is respectively less than 0.7%.
Comparative example 1 and embodiment 2, both differences are：Control the maximum level difference of the water small in embodiment 2
In 0.5%, the maximum level difference of plasticizer, surfactant and antioxidant is less than 0.7%.It can thus be seen that according to implementation
When the mode of example 2 controls the optical film of production, the stretching uniformity of the optical film of gained is more preferable, the optical film production of preparation
Polaroid color spot is few.
Comparative example 1 and comparative example 5, both differences are：In comparative example 5, cancel following process step, utilize
NaOH solution carries out alcoholysis again at 25-45 DEG C to vinol series polymer, alcoholysis degree is stably reached more than 99.5%.It is right
Color spot quantity in ratio 5 is significantly more, it is seen then that above-mentioned process step can significantly affect the optical property of optical film.
Comparative example 1 and comparative example 6, both differences are：In comparative example 6, cancel following process step, to poly- second
Enol based polymer is washed so that sodium acetate content is down to less than 0.02%, and content of ashes is less than 50ppm.Comparative example 6
In color spot quantity it is significantly more, it is seen then that above-mentioned process step can significantly affect the stretching uniformity of optical film, so as to influence light
Learn the optical property of film.
Above-described is only that the general knowledge such as known characteristic does not make excessive description herein in embodiments of the invention, scheme.
It should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise, some changes can also be made
Shape and improvement, these should also be considered as protection scope of the present invention, these effects and patent for implementing all without the influence present invention
Practicality.The scope of protection required by this application should be based on the content of the claims, the specific embodiment party in specification
Formula etc. records the content that can be used for explaining claim.
Claims (7)
1. a kind of polyethenol series optical film, the preparing raw material of the optical film includes vinol series polymer, water, plasticising
Agent, surfactant and antioxidant, it is characterised in that take 1 square centimeter of diaphragm in the optional position of optical film, the water,
The maximum level difference of plasticizer, surfactant and antioxidant is less than 1.2%.
2. a kind of polyethenol series optical film according to claim 1, it is characterised in that the maximum level difference of the water is small
In 0.5%, the maximum level difference of plasticizer, surfactant and antioxidant is less than 0.7%.
3. a kind of preparation method of polyethenol series optical film as claimed in claim 1, it is characterised in that including following step
Suddenly：
（1）Polyvinyl alcohol through further complete alcoholysis, washing is aided with water, plasticizer, surface work in double screw extruder
Property agent and antioxidant mixed, plastified, deaeration obtain film stoste；
（2）It is casting film-forming on 2-6 meters of casting roller in width；
（3）Moisture is removed on many dryer rolls, and subsequently enters and continues drying in air-floatation type oven；
（4）Traction winding and packaging, drawing tension ＜ 200N.
4. a kind of preparation method of polyethenol series optical film according to claim 3, it is characterised in that step（1）In
Alcoholysis again is carried out to vinol series polymer at 25-45 DEG C using NaOH solution, alcoholysis degree is stably reached more than 99.5%.
5. the preparation method of a kind of polyethenol series optical film according to claim 3, it is characterised in that alcoholysis is poly- again
Vinyl alcohol, is washed to it so that sodium acetate content is down to less than 0.02%, and content of ashes is less than 50ppm.
6. a kind of preparation method of polyethenol series optical film according to claim 3, it is characterised in that step（2）In
It is 70-95 DEG C to be cast roller temperature, and the film stoste containing PVA is cast on casting roller at 80-95 DEG C.
7. a kind of preparation method of polyethenol series optical film according to claim any one of 4-6, it is characterised in that step
Suddenly（2）In, film is less than 35% on casting roller from roller water content.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107540995A (en) * | 2017-10-18 | 2018-01-05 | 中国石油化工集团公司 | A kind of preparation method of polyvinyl alcohol optical film material stoste |
| CN107619566A (en) * | 2017-10-18 | 2018-01-23 | 中国石油化工集团公司 | A kind of preparation method of polyvinyl alcohol polaroid |
| CN109181185A (en) * | 2018-10-31 | 2019-01-11 | 中国石油化工股份有限公司 | A kind of preparation method of the dedicated PVA system melt of optical film and its film |
| CN109438889A (en) * | 2018-10-31 | 2019-03-08 | 中国石油化工股份有限公司 | A kind of preparation method of the good polyethenol series melt of rheological characteristic and its film |
| CN110845747A (en) * | 2019-10-30 | 2020-02-28 | 中国石油化工股份有限公司 | PVA film with good flexibility and manufacturing method thereof |
| CN111320831A (en) * | 2020-03-23 | 2020-06-23 | 苏州奥罗丹新材料有限公司 | Optical high-strength film material |
| CN111712533A (en) * | 2017-12-22 | 2020-09-25 | 株式会社可乐丽 | Polyvinyl alcohol film, film roll, and method for producing film roll |
| CN112280226A (en) * | 2020-10-19 | 2021-01-29 | 中国石油化工股份有限公司 | Polyvinyl alcohol optical film and preparation method thereof |
| CN113302238A (en) * | 2019-01-30 | 2021-08-24 | 株式会社爱赛璐 | Polyvinyl alcohol resin film |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107619566A (en) * | 2017-10-18 | 2018-01-23 | 中国石油化工集团公司 | A kind of preparation method of polyvinyl alcohol polaroid |
| CN107540995A (en) * | 2017-10-18 | 2018-01-05 | 中国石油化工集团公司 | A kind of preparation method of polyvinyl alcohol optical film material stoste |
| CN111712533A (en) * | 2017-12-22 | 2020-09-25 | 株式会社可乐丽 | Polyvinyl alcohol film, film roll, and method for producing film roll |
| CN111712533B (en) * | 2017-12-22 | 2023-02-28 | 株式会社可乐丽 | Polyvinyl alcohol film, film roll, and method for producing film roll |
| CN109438889A (en) * | 2018-10-31 | 2019-03-08 | 中国石油化工股份有限公司 | A kind of preparation method of the good polyethenol series melt of rheological characteristic and its film |
| CN109181185B (en) * | 2018-10-31 | 2021-06-04 | 中国石油化工股份有限公司 | PVA (polyvinyl alcohol) series melt special for optical film and preparation method of film of PVA series melt |
| CN109438889B (en) * | 2018-10-31 | 2021-07-30 | 中国石油化工股份有限公司 | Polyvinyl alcohol melt with good rheological property and preparation method of film thereof |
| CN109181185A (en) * | 2018-10-31 | 2019-01-11 | 中国石油化工股份有限公司 | A kind of preparation method of the dedicated PVA system melt of optical film and its film |
| CN113302238A (en) * | 2019-01-30 | 2021-08-24 | 株式会社爱赛璐 | Polyvinyl alcohol resin film |
| CN110845747A (en) * | 2019-10-30 | 2020-02-28 | 中国石油化工股份有限公司 | PVA film with good flexibility and manufacturing method thereof |
| CN110845747B (en) * | 2019-10-30 | 2022-11-11 | 中国石油化工股份有限公司 | PVA film with good flexibility and manufacturing method thereof |
| CN111320831A (en) * | 2020-03-23 | 2020-06-23 | 苏州奥罗丹新材料有限公司 | Optical high-strength film material |
| CN112280226A (en) * | 2020-10-19 | 2021-01-29 | 中国石油化工股份有限公司 | Polyvinyl alcohol optical film and preparation method thereof |
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