CN105278143A - Bending effect dimming film and manufacturing method thereof and application - Google Patents
Bending effect dimming film and manufacturing method thereof and application Download PDFInfo
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- CN105278143A CN105278143A CN201410293133.2A CN201410293133A CN105278143A CN 105278143 A CN105278143 A CN 105278143A CN 201410293133 A CN201410293133 A CN 201410293133A CN 105278143 A CN105278143 A CN 105278143A
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- liquid crystal
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- light modulation
- buckling effect
- effect light
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Abstract
The invention relates to a bending effect dimming film, formed by two films and an interlayer straining liquid crystal bending effect membrane. The base material of the film is polyethylene glycol terephthalate glycol ester (PET) printing films. Straining liquid crystal is a polymer dispersed liquid crystal composite material, the polymer is ultraviolet curable adhesive soft elastomer, and liquid crystal is a nematic liquid crystalline material. The bending effect dimming film has total-scattering fog-state appearance. When bending stress is applied on the film, the film turns into a semi-transparent state. After stress is removed, the film returns to the fog state. The straining liquid crystal bending effect dimming film is suitable to manufacture film anti-counterfeiting trademark new products, and is a plastic money new technology which can replace paper money.
Description
Technical field
Technical solution of the present invention relates to a kind of buckling effect light modulation film and manufacture method thereof and application, belongs to the false proof new technical field of optical thin film.
Background technology
Polymer Dispersed Liquid Crystal (PDLC) and polymer network liquid crystal (PNLC) are polymkeric substance and liquid crystal material compound system, find in Polymer Dispersed Liquid Crystal and polymer network liquid crystal research, apply stress and have impact to the polymerization of polymkeric substance and Liquid Crystal Molecules Alignment state, i.e. stress induced liquid crystal aligning effect, this research field is called strain liquid crystal (SLC).Its goods of Polymer Dispersed Liquid Crystal electric-controlled light-regulating film have mist state outward appearance, and apply electric field and become pellucidity, the electronic-control dimming glass based on the manufacture of electric-controlled light-regulating membrane technology obtains commercial application now.We are engaged in non-automatically controlled strain dimming glass research, patent of obtaining the authorization " polymer dispersion liquid crystal piezo-optical effect film and manufacture method and application " thereof (200810154177.1), " Polymer Dispersed Liquid Crystal shearing effect light glass and manufacture method and application " thereof (200910070975.0), publication " transconfiguration piezooptical effect dimming glass " (201210324128.4), " transconfiguration shearing effect privacy glass " (201210324127.X), the series of patents such as " a kind of scattering spread glass and manufacture method and application " thereof (201310013345.6) and " a kind of trans electronic-control dimming glass and manufacture method and application " thereof (201310135804.8), when we transfer development strain light modulation film goods, find new experimental phenomena, create inspiration of the present invention.
Summary of the invention
Technical matters to be solved by this invention is: a kind of buckling effect light modulation film, and goods are mist state in flat, and when applying bending stress generation Bending Deformation to goods, goods become translucent from mist state, remove bending stress and recover mist state.This function film with peculiar " power light " effect is false proof new technology, is expected to have application prospect in the plastics coin field of plastic anti-false trade mark and alternative papery coin.
The present invention solves this technical problem adopted technical scheme: a kind of buckling effect light modulation film, the squeegee sheet articles be made up of two panels transparent film laminated polymer dispersed liquid-crystal film, film used is polyethylene terephthalate (PET) printing film base material, polymer dispersion liquid crystal material used is mixed by uv curable oligomer and Nematic phase liquid crystal material, and prepolymer and Nematic phase liquid crystal material form with the mass ratio of about 3: 2.Described prepolymer is made up of alkoxy nonyl phenyl acrylate, the trimethylolpropane triacrylate of 65 ~ 75% and the light trigger 1173 of 3 ~ 5% of 20 ~ 25%, and described number percent is mass percent, and after prepolymer cures, refractive index can be roughly n
p~ 1.5.The ordinary refraction index of described Nematic phase liquid crystal material is roughly n
o~ 1.5, very optical index is roughly n
e~ 1.7, birefringence rate variance is more than Δ n ~ 0.2, and wherein the formation of polymer dispersed liquid-crystal film also comprises the gasket material plastic microsphere that diameter is 10 ~ 30 μm, and its consumption calculates with product area and is less than 50/cm
2.
Beneficial effect of the present invention: described buckling effect light modulation film is under normal conditions in scattering mist state, liquid crystal droplet is spherical droplet, liquid crystal molecule is without consistent orientation, namely the optical property of liquid crystal droplet is not isotropy common liq, neither anisotropy uniaxial crystal, light beam is not linearly propagated in liquid crystal droplet, occurs to reflect and reflect again, therefore strong light scattering occurs at liquid crystal and polymer interface place because refractive index is suddenlyd change.When applying bending stress to goods and producing Bending Deformation, liquid crystal droplet shape becomes inclination spheroid-like from spheroidal, in liquid crystal droplet, liquid crystal molecule is along bending direction roughly tilted alignment, and therefore liquid crystal droplet shows as the character of anisotropy uniaxial crystal, and along inclined direction refractive index is n
ewith refractive index polymer n
punequal and difference is comparatively large, vertical bank direction is refractive index n
owith refractive index polymer n
pequal.But incidence natural lights can resolve into along inclined direction with two, vertical bank direction component, so half light scattering along inclined direction, along the half Transmission light in vertical bank direction, at this moment buckling effect light modulation film just has scattering polaroid function.Certainly because flecition liquid crystal molecule in principle can not highly consistent orientation, therefore the transmittance of buckling effect light modulation film can not be very high, reaches 30% and just compare to calculate and semi-transparently to understand.
Compare with the patent of invention that the present inventor has declared, what early stage did is strain dimming glass goods, principle is piezooptical effect and shearing effect, product application field is based on construction and decoration new material strain dimming glass, the present invention makes film goods, principle is buckling effect, and product application field is the plastics coin etc. making plastic anti-false trade mark and alternative papery coin.
Compare with existing electric-controlled light-regulating membrane technology, existing electric-controlled light-regulating membrane technology occurs nearly 30 years, technology is ripe already, there are heat curing and ultraviolet curing process, owing to being electrooptical effect product, pursue the excellent electro-optical characteristic of the low grade of driving voltage, polymkeric substance used is often as duroplasts, little to liquid crystal molecule effect, substantially do not have " buckling effect " of the present invention.And the present inventor is absorbed in the non-automatically controlled strain dimming glass of research, polymkeric substance used is as soft rubber, and electrooptical effect is very bad, and operating voltage can be very high, but power luminous effect is obvious, applies pressing, shears or bendingly all easily to cause from scattering to translucent change.
In actual fabrication, different from making glassware, existing curable adhesive is poor to film cohesive force, can use high resistance electrically conducting transparent film.Electric-controlled light-regulating film electrically conducting transparent film is low resistance, and conduction thickness, price comparison is expensive, and electromagnetic screen electrically conducting transparent film is high resistance, and conductive layer is thin, and price comparison is low.Have this layer of Conductive inorganic thing, other also can be selected to be coated with transition film film, curable adhesive is just higher with the cohesive force of film, can solve cohesive force problem.
Accompanying drawing explanation
Accompanying drawing 1 is buckling effect light modulation film structure schematic diagram of the present invention, in Fig. 1, and 101---film base material; 102---polymer dispersed liquid crystal layer.Accompanying drawing 2 is buckling effect principle schematic, in Fig. 2, and 201---flexure plane summit liquid crystal molecular orientation is chaotic, and scattering is opaque; 202---vertical plane is observed, and liquid crystal molecules tilt orientation is dim translucent; 203---observe along liquid crystal molecules tilt direction, transmittance is higher.
Embodiment
The manufacture method basic step of buckling effect light modulation film is:
The first step, preparation prepolymer, alkoxy nonyl phenyl acrylate with 20 ~ 25%, the trimethylolpropane triacrylate of 65 ~ 75% and the light trigger 1173 of 3 ~ 5% prepare prepolymer, are stirred at ambient temperature by potpourri and fully mix for 2 minutes.
Second step, preparation liquid crystal glue, the prepolymer first step prepared and Nematic phase liquid crystal material mix with the mass ratio of 3: 2, and add a small amount of plastic microsphere wadding, stirring with stirrer under room temperature makes it be thoroughly mixed to form liquid crystal glue for 2 minutes, and liquid crystal glue is water white transparency state, and viscosity is less.
3rd step, cleaning rubber plate base, is cut into the transparent film of thickness 0.1 ~ 0.5mm the size of needs, whether checks film cleaning, finds that stain alcohol cotton stick is wiped clean.
4th step, overlay film, wins over two films from different directions and injects accurate laminating machine to turning in thick roller, the liquid crystal glue syringe prepared is filled between two films, through laminating machine, the film of folder liquid crystal glue is combined into the uniform interlayer film of thickness.
5th step, exposure, interlayer film is transported on ultraviolet lamp exposure desk and exposes, the potpourri of prepolymer and nematic liquid crystal is separated, ultraviolet lamp moderate strength is (as light intensity flux 400W/m
2), time shutter about 2min, prepolymer polymerization reaction take place, nematic liquid crystal is separated out from polymkeric substance, and form the liquid crystal droplet that diameter is less than 1 μm, products appearance is scattering mist state.
The further application of goods, makes anti-counterfeiting mark or plastics coin, can be deep processing printed pattern again on film, be cut into and need size etc.
Claims (6)
1. a buckling effect light modulation film, is characterized in that it presss from both sides polymer dispersed liquid crystal layer by two panels transparent film to form compound adhesive sheet articles.
2. buckling effect light modulation film according to claim 1, is characterized in that described transparent film is polyethylene terephthalate (PET) printing film base material.
3. buckling effect light modulation film according to claim 1, it is characterized in that described polymer dispersed liquid crystal layer be by the potpourri of prepolymer and liquid crystal material with about 3: 2 mass ratio mix after make through ultraviolet light polymerization under certain condition.
4. buckling effect light modulation film according to claim 1, it is characterized in that preparation process is: be filled between two panels transparent film by the potpourri of prepolymer and nematic liquid crystal, be separated through ultraviolet photoetching, products appearance is scattering mist state.
5. buckling effect light modulation film according to claim 1, it is characterized in that " power light " character had, goods are in scattering mist state when flattening, and goods are subject to the bending stress deformation that bends and just occur becoming translucent phenomenon from scattering, remove Bending Deformation and recover scattering again.
6. buckling effect light modulation film according to claim 1, is characterized in that application, and this buckling effect light modulation film can as false proof new technology, obtains application in the field such as plastics coin of film anti-false trademark and alternative papery coin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293133.2A CN105278143A (en) | 2014-06-25 | 2014-06-25 | Bending effect dimming film and manufacturing method thereof and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293133.2A CN105278143A (en) | 2014-06-25 | 2014-06-25 | Bending effect dimming film and manufacturing method thereof and application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105278143A true CN105278143A (en) | 2016-01-27 |
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| CN201410293133.2A Pending CN105278143A (en) | 2014-06-25 | 2014-06-25 | Bending effect dimming film and manufacturing method thereof and application |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762000A (en) * | 2018-05-15 | 2018-11-06 | 科立视材料科技有限公司 | A kind of 3D glass exposures film manufacture craft |
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|---|---|---|---|---|
| CN101430449A (en) * | 2008-12-17 | 2009-05-13 | 河北工业大学 | Polymer dispersion liquid crystal piezo-optical effect film and manufacturing method and use thereof |
| CN102354081A (en) * | 2011-11-10 | 2012-02-15 | 范志新 | Stressed liquid crystal transparent projection screen as well as preparation method and application thereof |
| CN103760713A (en) * | 2013-12-25 | 2014-04-30 | 无锡科技职业学院 | Strain liquid crystal dimming display glassware and manufacturing method thereof |
-
2014
- 2014-06-25 CN CN201410293133.2A patent/CN105278143A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101430449A (en) * | 2008-12-17 | 2009-05-13 | 河北工业大学 | Polymer dispersion liquid crystal piezo-optical effect film and manufacturing method and use thereof |
| CN102354081A (en) * | 2011-11-10 | 2012-02-15 | 范志新 | Stressed liquid crystal transparent projection screen as well as preparation method and application thereof |
| CN103760713A (en) * | 2013-12-25 | 2014-04-30 | 无锡科技职业学院 | Strain liquid crystal dimming display glassware and manufacturing method thereof |
Non-Patent Citations (3)
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|---|
| 于天池: "聚合物分散液晶增强散射的理想模型", 《光学学报》 * |
| 王丹: "PET用途的性质分析", 《广西纺织科技》 * |
| 范志新: "聚合物分散液晶膜的压光效应", 《光学学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108762000A (en) * | 2018-05-15 | 2018-11-06 | 科立视材料科技有限公司 | A kind of 3D glass exposures film manufacture craft |
| CN108762000B (en) * | 2018-05-15 | 2021-07-20 | 科立视材料科技有限公司 | 3D glass exposure film manufacturing process |
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Application publication date: 20160127 |
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