CN101052520A - Optical films incorporating cyclic olefin copolymers - Google Patents

Abstract

The present disclosure relates to optical bodies including one or more norbornene-based cyclic olefin film layers and one or more rough strippable skin layers operatively connected to a surface of the norbornene-based cyclic olefin film layer. The rough strippable skin layer comprises a continuous phase and a disperse phase. Methods of producing such optical bodies are also disclosed.

Description

The blooming that comprises cyclic olefine copolymer

Technical field

The disclosure relates to optical bodies that comprises cyclic olefine copolymer and strippable coarse top layer and the method for producing this optical bodies.

Background technology

Blooming (comprising optical brightening membrane) is widely used in multiple purpose.Exemplary application comprises small electronic display, and it comprises the LCD (LCD) that is placed in mobile phone, personal digital assistant, computer, TV and other device.This film comprises Vikuiti ^TMBrightness enhancement film (BEF), Vikuiti ^TMReflecting type polarizing brightness enhancement film (DBEF) and Vikuiti ^TMDiffuse reflection type polarizing coating (DRPF), all these can derive from 3M company.Other widely used blooming comprises reflector, for example, and Vikuiti ^TMEnhanced specular reflector (ESR).

Though polymeric optical films can have good optical and physical property, but a limitation of some this film is when it stands temperature fluctuation, they show significant dimensional instability sometimes, even also be like this when during normal use standing temperature fluctuation.This dimensional instability can cause forming fold in film, this fold can show as visible shade in LCD.When temperature near or when surpassing about 85 ℃, this dimensional instability is just especially common.When the film of some types experiences the condition (for example condition of 60 ℃ and 70% relative humidity) of high temperature and high humility circularly, also can observe dimensional instability.

Another defective of some bloomings is that in manufacturing, processing and transportation, their surface can wreck, and for example, produces cut and indenture and suffers particle contamination.This defective may make blooming become and can not use, and perhaps, this blooming has only could use when combining with the added diffusion sheet to hide these defectives does not allow the beholder find.In the display of watching in long-time in-plant mode usually, the defective on elimination, minimizing or hiding blooming and other parts is even more important.Being placed on that illuminace component (for example LED lamp or fluorescent tube) behind the blooming stashes also is useful.

Summary of the invention

In a kind of illustrative embodiments, the disclosure relates to optical bodies, it is cycloolefin rete and at least one strippable coarse top layer that this optical bodies has ENB, and wherein said at least one strippable coarse top layer and described ENB are that the surface of cycloolefin rete is operably connected.Described at least one strippable coarse top layer comprises continuous phase and decentralized photo.

In another kind of illustrative embodiments, the disclosure relates to optical bodies, it is cycloolefin rete and at least one strippable coarse top layer that this optical bodies has ENB, and wherein said at least one strippable coarse top layer is that the cycloolefin rete is operably connected with described ENB.In these exemplary, described at least one strippable coarse top layer comprises first polymer, second polymer and additional materials, wherein said second polymer is different with described first polymer, and at least one in described additional materials and described first polymer and described second polymer be unmixing basically.

In another illustrative embodiments, it is the method that the cycloolefin rete is given mist degree that the disclosure relates to ENB.Illustrative methods may further comprise the steps: it is cycloolefin film that at least one strippable coarse top layer is operably connected to described ENB, and wherein, described strippable coarse top layer comprises continuous phase and decentralized photo; And be that the cycloolefin layer is given and the corresponding texture of the texture on described strippable coarse top layer to described ENB.

Description of drawings

How to make and use the present invention for those skilled in the art are more easily understood, describe exemplary of the present invention with reference to the accompanying drawings in detail, wherein:

Fig. 1 is the show in schematic partial sections according to the optical bodies of exemplary structure of the present disclosure, two opposing lip-deep two strippable coarse top layers that show blooming and place this blooming;

Fig. 2 is the show in schematic partial sections according to the optical bodies of another exemplary structure of the present disclosure, a lip-deep strippable coarse top layer that shows blooming and place this blooming;

Fig. 3 is according to the show in schematic partial sections of the optical bodies of another embodiment structure of the present disclosure, shows blooming, places a lip-deep strippable coarse top layer and the smooth extexine of this blooming;

Fig. 4 is the cutaway view of the structure of schematically illustrated routine 1-example 8;

Fig. 5 is after removing strippable top layer, is the representative number microphoto that the visual angle place of 45 ° of cycloolefin laminar surfaces is produced the configuration of surface imaging with secondary electron imaging (SEI) technology departing from ENB;

Fig. 6 is to be the representative number microphoto that the visual angle on 45 ° on the surface of the cycloolefin layer strippable skin of removing is produced the configuration of surface imaging with secondary electron imaging (SEI) technology departing from ENB from Fig. 5;

Fig. 7 is the cutaway view of the structure of schematically illustrated predictive example 10.

Detailed Description Of The Invention

As mentioned above, the disclosure provides a kind of optical body, and this optical body has the one or more strippable coarse top layer that is operably connected with blooming. For example, by with blooming and strippable coarse top layer together coextrusion or orientation, perhaps by another suitable method, this strippable coarse top layer can be used for giving superficial makings to this blooming. Superficial makings can comprise surface texture, and, in some exemplary, can comprise asymmetrical surface texture. In some applications, these asymmetrical surface textures can improve the optical property of optical body. The title of owning together that the method that has the optical body on strippable coarse top layer and make this optical body was submitted on October 29th, 2004 is the U. S. application No.10/977 of " Optical Bodies and Methods for Making Optical Bodies ", describe to some extent in 211, the disclosure of this application is incorporated herein by reference.

Generally speaking, strippable top layer of the present disclosure is operably connected with blooming, thereby these top layers can both keep sticking on this blooming in initial manufacture, storage, processing, encapsulation, transportation and following process, but after, the user can peel off or remove them. For example, can before being about to be installed among the LCD, remove strippable top layer, and need not apply excessive power, can not destroy blooming or blooming can be by the top layer particle contamination of abundant residues.

The disclosure also relates to blooming, and this blooming is that cyclic olefine copolymer consists of by one deck ENB at least, and perhaps comprising at least, one deck ENB is cyclic olefine copolymer. ENB is that cyclic olefine copolymer is the unique material that demonstrates good sign in multiple electronics/optics/display application. They are optically transparent, have good photostability (comprising the UV photostability), and have low-down birefringence and good moisture resistance. They also have dimensional stability (that is, glass transition temperature is about 100 ℃ to about 160 ℃, high rigidity and low-down hygroscopicity). The ENB that is applied on the blooming is that the cycloolefin layer provides dimensional stability and anti-warpage properties for this blooming.

The use ENB is that the optical bodies of cycloolefin layer formation is normally flexible, thereby can use traditional tablet treatment facility to process this optical bodies, and can not damage this optical bodies.Introducing one or more ENBs in optical bodies is that the cycloolefin layer will be resisted the distortion that this optical bodies is taken place in the process that is exposed to heat and moisture, simultaneously still can easily handle and deposit this optical bodies, for example, optical bodies is twined and left on the roller.Additional one or more ENBs are that the cycloolefin layer usually can be so that this optical bodies per 2 hours repetitive cycling in 192 hours take place significantly to degenerate through-35 ℃ to 85 ℃ temperature in optical bodies.These cyclic tests are designed to be used for the long-time stability under the expection service condition of indication in LCD display or other device.The title of owning together that the method that has the optical bodies on strippable coarse top layer and make this optical bodies was submitted to simultaneously on October 29th, 2004 is the U. S. application No.10/976 of " OpticalFilms Incorporating Cyclic Olefin Copolymers ", describe to some extent in 675, the disclosure of this application is incorporated herein with way of reference.

Referring now to accompanying drawing, these accompanying drawings show others of the present disclosure.Fig. 1, Fig. 2 and Fig. 3 show exemplary of the present disclosure with the schematic form of simplifying.In Fig. 1, show the optical bodies 10 of constructing according to exemplary of the present disclosure with the schematic form of simplifying, optical bodies 10 has blooming 12 and places a surface or two opposing lip-deep at least one strippable coarse top layers 18 of this blooming 12.Usually by coextrusion or such as coating, casting or stacked other suitable method with strippable coarse top layer 18 attached on the blooming 12.Some suitable methods of making exemplary optics body of the present disclosure require film is carried out preliminary treatment, perhaps benefit from least film is carried out pretreated operation.

In some exemplary, can on blooming, directly form strippable top layer.In the process that strippable top layer is attached on the blooming, after this attach operation or in the following process process, superficial makings (comprising depression 12a) can be given to blooming 12 in strippable coarse top layer 18.Therefore, in typical embodiments of the present disclosure, at least a portion in the decentralized photo 19 can form projection 19a, described projection protrudes from the surface on strippable coarse top layer 18, when extruding optical bodies 10 or optical bodies 10 being orientated or other processing when handling, projection 19a can make blooming 12 form the pattern of surface texture, and wherein, this surface texture has and the corresponding depression of projection 19a 12a.Blooming 12 can have film body 14 and one or more optional subsurface stratum 16.One or more ENBs that can comprise in the described subsurface stratum are cyclic olefine copolymer.

In the embodiment illustrated, strippable coarse top layer 18 comprises continuous phase 17 and decentralized photo 19.Can form decentralized photo 19 in the following way: in the suitable process segment; particle is sneaked in the continuous phase 17; perhaps in continuous phase 17, sneak into can not be miscible with it one or more materials; preferably, be separated afterwards and on the interface between strippable skin-material and the blooming, form coarse surface.Fig. 1 shows continuous phase 17 and decentralized photo 19 with the form of general simplification view, and in fact these two phases in appearance may be more inhomogeneous more irregular.The degree that immiscible polymer is separated depends on the driving force of separation, for example, compatible degree, extrudes processing temperature, mixability, hardening heat, orientation temperature and power in casting and film forming process and follow-up thermal history.In some exemplary, strippable coarse top layer 18 can have decentralized photo or/and a plurality of parfacies of continuous phase.

In Fig. 2, the optical bodies 20 of constructing according to another exemplary of the present disclosure has a blooming 22 and a lip-deep strippable coarse top layer 28 that places blooming 22.In this exemplary embodiment, blooming 22 by comprise ENB be cyclic olefine copolymer the layer form.In the process that coarse top layer is attached on the blooming, after this attach operation or in the process of blooming being carried out following process (for example stacked, coextrusion or orientation process), superficial makings (comprising depression 22a) is given to blooming 22 in strippable coarse top layer 28.Strippable coarse top layer 28 comprises continuous phase 27 and decentralized photo 29.

In Fig. 3, the optical bodies 30 of constructing according to another exemplary of the present disclosure has a blooming 32 and a lip-deep strippable coarse top layer 38 that places blooming 32.In this exemplary embodiment, blooming 32 also by comprise ENB be cyclic olefine copolymer the layer form.In the process that coarse top layer is attached on the blooming, after this attach operation or in the process (for example coextrusion, orientation or lamination process) of following process, superficial makings (comprising depression 32a) is given to blooming 32 in strippable coarse top layer 38.In this exemplary embodiment, strippable coarse top layer 38 comprises continuous phase 37, decentralized photo 39 and smooth extexine 35, and this extexine can form with the remainder on strippable coarse top layer 38 and remove.The another way that can Gong select for use is that smooth extexine 35 can form dividually and/or remove with strippable coarse top layer 38.In some exemplary, smooth extexine 35 can comprise at least a and continuous phase 37 identical materials.This smooth extexine can help reducing since the extruder die lip that material caused of decentralized photo 39 sting mould phenomenon (die lip buildup) and flow pattern.Fig. 1, Fig. 2 and these layers shown in Figure 3 can be configured to have with shown in the different relative thickness of those thickness.

Illustrate in greater detail others of the present disclosure now.

Strippable top layer

Optical bodies of the present disclosure is formed by one or more strippable top layers (normally one or more strippable coarse top layer).According to the disclosure, can control the interface adhesion between strippable coarse top layer and the blooming, thereby make strippable coarse top layer to be operably connected with blooming, promptly, as long as concrete application need, strippable coarse top layer just can keep sticking on the blooming, and before using, this can be peeled off fully or remove from blooming in strippable coarse top layer, and need not apply excessive power, can not destroy the pollution that blooming or blooming can not be subjected to the top layer residue significantly.

In some cases, if there are enough adhesive attractions on strippable coarse top layer to blooming, making for example can apply these top layers again after checking blooming in addition, can be useful like this.In exemplary more of the present disclosure, the optical bodies with strippable coarse top layer (it is operably connected with blooming) is transparent or clearly basically, so can use the checkout facility of standard to check their defective.This exemplary transparent optical body has so strippable coarse top layer usually, and in this coarse top layer, decentralized photo has approximate identical or abundant similar refractive index with continuous phase.In some exemplary of this transparent optical bodies, these two refractive index of decentralized photo constituent material and continuous phase constituent material differs each other and is no more than about 0.02.

Have been found that, if can select to be included in the material at least one the strippable coarse top layer in the optical bodies of the present disclosure, make this top layer have such characteristics to the adhesive attraction of blooming: peeling force is about at least 1.5 gram/inches or bigger, perhaps about 2 gram/inches or bigger, then described at least one strippable coarse top layer has useful characteristic probably with the surperficial formed this mode that is operably connected of adjacent blooming.Another exemplary optics body according to disclosure structure should be such, that is, peeling force is about at least 3 gram/inches, 4 gram/inches, 5 gram/inches, 10 gram/inches or 15 gram/inches or bigger.In some exemplary, peeling force can be about 100 gram/inches, about 120 gram/inches or bigger.Some desirable peeling force values comprise about 50 gram/inches, 35 gram/inches, 30 gram/inches or 25 gram/inches or littler.The desirable approximate extents of some of adhesion comprises: 1.5 gram/inches are to 120 gram/inches, and 2 gram/inches are to 50 gram/inches, and 5 gram/inches are to 35 gram/inches, and perhaps 15 gram/inches are to 25 gram/inches.In other exemplary, adhesion can be in other suitable scope.

Planning with hand or adopting other mode that can not produce bigger power to remove in the applicable cases on strippable coarse top layer, the lower peeling force peeling force of 120 gram/inches (for example less than) is desirable.For example, remove in the situation on strippable coarse top layer with machine in plan, the bigger peeling force that surpasses 120 gram/inches may be acceptable.In having the embodiment of higher release force profiles, large-area strippable coarse top layer also can be removed by using machine sometimes.

Can be used to characterize the peeling force of exemplary of the present disclosure according to following method measurement.Particularly, this test method provides a kind of process of removing the required peeling force in strippable top layer from the blooming (for example, multilayer film, ENB are cyclic olefine copolymer film etc.) that is used for measuring.

Downcut test bar from optical bodies with strippable coarse top layer (it sticks on the blooming).About 1 inch of the common width of this test bar, length are greater than about 6 inches.At the environmental aging characteristic, can (for example carry out preliminary treatment to test bar, under the condition of 85 ℃, 65 ℃ temperature and 70% relative humidity (RH), under-40 ℃ temperature, perhaps, progressively be increased to 85 ℃ of (keeping one hour under each temperature after per step) circulations from-35 ℃ after 192 hours.Last a kind of processing is sometimes referred to as thermal shock).Usually, before test, sample should be remained under the condition of room temperature and 50%RH and stop about more than 24 hours.Then, for example, use two-sided tape (for example can derive from the Scotch of 3M company ^TMTwo-sided tape), 1 inch test bar is applied on the rigid plate, and, plate/test bar assembly is installed in correct position place on the slide block in the electronic stripping tester.

Then, the leading edge on strippable coarse top layer is separated with blooming, and it is clipped on the anchor clamps that are connected with the load sensor of electronic stripping tester.Then, drive the slide block that is used for holding plate/test bar assembly with the constant speed of about 90 inch per minute clocks and leave load sensor, thereby effectively strippable top layer is peeled off from the substrate blooming with the angles of about 180 degree.When slide block moved away anchor clamps, load sensor sensed from film and peels off the required power in this strippable top layer, and with this power of microprocessor records.Then, peel off the required mean value of making every effort in 5 seconds to move (preferably, ignoring the initial impact when beginning to peel off) in stable state, and write down this mean value.

Have been found that, by carefully selecting to be used for preparing the material of continuous phase and decentralized photo and guaranteeing at least some materials (material of blooming outer surface especially of this material and the material that is used to prepare blooming, perhaps, in suitable embodiment, especially the material of subsurface stratum) compatible, can obtain useful performance according to the exemplary optics body of disclosure structure.According to a kind of embodiment of the present disclosure, continue on blooming, to adhere to one required period in order to make strippable coarse top layer, the continuous phase in the strippable coarse top layer should have low degree of crystallinity, perhaps should be fully unbodied.Yet in some exemplary, continuous phase also can show the degree of crystallinity of higher level.Have been found that other variable also can influence adhesion.

Therefore, in suitable embodiment of the present disclosure, can strippable coarse top layer be adjusted in the required scope the degree of adhesion on adjacent blooming surface (one or more) and the roughness on surface by following manner: sneak into crystallization material more or less, sneak into the strong or weak material of adhesive attraction, perhaps, improve the degree of crystallinity of one or more materials in these materials by subsequent process steps.In some exemplary, the different material of two or more that can adhesive attraction is different is used as the common continuous phase in the continuous phase that is included in the strippable coarse top layer of the present disclosure.In order to regulate the crystalline rate of the one or more phases in the strippable skin combined thing, also nucleator can be mixed in the strippable coarse top layer.In some exemplary,, pigment, dyestuff or other colouring agent can be joined in the material on strippable coarse top layer in order to improve the visibility on top layer.

In addition, have been found that the other factors beyond the degree of crystallinity also can influence peel adhesion and surface roughness.The influence of these other factorses may be more greater or lesser than the influence of degree of crystallinity.A kind of such factor is a polarity.According to a kind of embodiment of the present disclosure, have the peeling force value that is in the OK range in order to make strippable coarse top layer, the continuous phase in this strippable coarse top layer should have the polarity that fully is different from blooming.For example, ENB is that cyclic olefine copolymer is normally nonpolar.

Similarly, by different material (for example polymeric material, inorganic material or these two) being mixed or being incorporated in the decentralized photo, can regulate the surface roughness on strippable coarse top layer.In addition, can regulate the ratio of decentralized photo and continuous phase, with control surface roughness and degree of adhesion, this ratio will depend on used concrete material.Thereby, serve as continuous phase with a kind of, two or more polymer, and with a kind of, two or more can be that polymer also can not be that the material of polymer provides the decentralized photo with proper surface roughness, to give superficial makings.Can select one or more polymer in the continuous phase, so that optical film material is produced required adhesive attraction.

Under decentralized photo can the situation of crystallization, can improve the roughness on strippable top layer by the mode that makes this crystallization under the suitable condition of extruding processing temperature, mixability, quenching and interpolation nucleator, nucleator wherein for example is: aromatic carboxylic acid salt's (Sodium Benzoate); Dibenzyl sorbitol (DBS) for example derives from Milliken ﹠amp; The Millad 3988 of Company company; And sorbitol acetal, for example, the NC-4 fining agent of the Irgaclear fining agent of Ciba Specialty Chemicals company and Mitsui Toatsu Chemicals company.Other nucleator comprises organic phosphate ester salt and other inorganic material, for example, derives from the ADKstab NA-11 and the NA-21 phosphate of Asahi-Denka company and derives from Milliken; The ENB carboxylate Hyperform HPN-68 of Company company.In some exemplary, decentralized photo comprises particle (those particles that for example comprise inorganic material), described particle will protrude from the surface on strippable coarse top layer, and optical bodies is carried out such as extrude, orientation or stacked together add man-hour, these particles are given surface texture to blooming.

Decentralized photo in the strippable top layer

Decentralized photo in the strippable coarse top layer greatly (for example can comprise enough; average diameter is at least 0.1 micron) particle or other coarse characteristic body; by exerting pressure and/or temperature for the blooming with strippable coarse top layer, these particles or other coarse characteristic body are used for giving superficial makings to the outer surface of adjacent optical film.Usually, quite a few projection at least in the decentralized photo should be greater than the light wavelength of the decentralized photo that is used for throwing light on, and still, these projections are still enough little, to such an extent as to can not be differentiated by naked eyes.This particle can comprise the particle of inorganic material, for example, and silica dioxide granule, talc particle, Sodium Benzoate particle, calcium carbonate granule, its combination or any other suitable particle.The another way that can Gong select for use is that decentralized photo can be by forming for (or becoming) immiscible basically polymeric material in continuous phase under proper condition.

Decentralized photo can be formed by one or more materials (for example inorganic material, polymer or these two), and wherein said material is different with at least a polymer in the continuous phase, and immiscible is in continuous phase.Some polymer dispersed have the crystallinity of polymer that is higher than in the continuous phase mutually.In some exemplary, in decentralized photo, use more than a kind of material, can produce rough features thing or the projection or the compound projection (for example, " projection on the projection " structure) of different size.This structure can be of value to the higher surface of formation mist degree on blooming.Preferably, the only mechanically miscible or immiscible of decentralized photo and continuous phase polymer.Discrete state material and continuous state material can be separated under suitable processing conditions, and form tangible phase inclusion enclave in continuous matrix, and be especially all the more so on the interface between blooming and the coarse strippable skin.

The exemplary materials that is particularly useful for decentralized photo comprises: SAN; Polystyrene; Medium density polyethylene; Modified poly ethylene; PB Polybutene-1; The ENB based copolymer; The blend that forms by Merlon and copolyester; The 6-caprolactone polymer for example, can derive from the TONE of Dow Chemical company ^TMP-787; The copolymer of propylene and ethene; Noblen; Other propylene copolymer; Poly-(ethylene-octene) copolymer; Show the polymer of antistatic property; High density polyethylene (HDPE); Calcium carbonate (CaCO ₃) and poly-(methyl methacrylate).Decentralized photo in the strippable coarse top layer can comprise any other suitable material (for example, any suitable crystalline polymer), and this decentralized photo can comprise and one or more material identical materials that are used for blooming.

Continuous phase in the strippable top layer

Be applicable to that the material in the continuous phase on strippable coarse top layer comprises (for example): polyester, for example, PETG (PET), polybutylene terephthalate (PBT) (PBT); Copolyester, for example, through the PETG (PETG) of glycol modification; PEN (PEN) and (ethylene naphthalate) copolymer (CoPEN); Polyamide, for example, nylon-6; And Merlon.In addition, also has other material applicatory in some cases.

Be applicable to that other material in the continuous phase on strippable coarse top layer comprises (for example) polyolefin, for example, the polypropylene of low melting point low-crystallinity and copolymer thereof, low melting point low crystallinity polyethylene and copolymer thereof, low melting point low-crystallinity polyester and copolymer thereof or its any suitable combination.This low melting point low-crystallinity polypropylene and copolymer thereof are made of the copolymer of Noblen, propylene and ethene or alpha-olefin material with 4 to 10 carbon atoms.Term " copolymer " not only comprises bipolymer, and comprises terpolymer and the polymer that is made of four kinds or more kinds of polymers compositions.Suitable low melting point low-crystallinity polypropylene and copolymer thereof comprise (for example): syndiotactic polypropylene (for example, derive from the Finaplas 1571 of Total Petrochemicals company, a kind of random copolymer that in the syndiotactic polypropylene skeleton, has extremely low ethylene contents); And the random copolymer of propylene (for example, deriving from the PP8650 or the PP6671 of Atofina (present Total Petrochemicals) company).If desired, the copolymer of described propylene and ethene also can be extruded blend with polypropylene homopolymer, thereby the top layer of higher melt is provided.

Other suitable low melting point low crystallinity polyethylene and polyethylene and ethylene copolymers comprises (for example) LLDPE and ethene (vinyl alcohol) copolymer.The random copolymer that suitable polyethylene comprises (for example) propylene and ethene (for example, derive from the PP8650 of Total Petrochemicals company), ethylene-octene copolymer (for example, derive from the Affinity PT 1451 of Dow Chemical company), and comprise ethene (vinyl acetate) copolymer.In embodiments more of the present disclosure, continuous phase comprises unbodied polyolefin, for example, and unbodied polypropylene, unbodied polyethylene, unbodied polyester or its any suitable combination or any suitable combination that forms with other material.In some embodiments, the material on strippable coarse top layer can comprise nucleator (for example, Sodium Benzoate), with crystallization control speed.In addition, anti-static material, anti-adhering material, colouring agent (for example pigment and dyestuff), stabilizing agent and other processing aid can be joined in the continuous phase.As a kind of arbitrary way or a kind of optional mode, the continuous phase in the strippable coarse top layer can comprise any other suitable material.In some exemplary, the migration-type antistatic additive can be used for strippable coarse top layer, to reduce the adhesive attraction of strippable coarse top layer to blooming.

The thickness on strippable coarse top layer is generally 0.5 mil to 6 mil.In some embodiments, strippable coarse top layer can be thicker or thinner.

ENB system layer and the blooming that comprises ENB system layer

According to the disclosure, ENB be the cycloolefin layer contain norbornene-based polymer (for example polymer, copolymer and wherein one or more polymer contain the blend polymer of ENB or norbornene derivative class monomeric unit).The character that is used for describing layer (normally being positioned at multilayer film or on it one or more layers) also is applicable to film (independently ENB is the cycloolefin layer, otherwise or as yet links to each other with additional materials).Usually, ENB is that the cycloolefin layer is the copolymer that contains the ENB based copolymer.Term " copolymer " comprises the polymer with two or more different monomers unit.The example that is used for the monomer of ENB based copolymer comprises: ENB, α-ENB (being obtained by ethene and bicyclopentadiene reaction) and derivative thereof, they and alkene (as ethene) polymerization.Also can adopt ring-opening polymerization polymer based on bicyclopentadiene or related compound.Norbornene derivative comprises the derivative that replaces through alkyl, alkylidene and aromatic radical, and the derivative that replaces through halogen, hydroxyl, ester, alkoxyl, cyano group, acid amides, acid imide and silicyl.

Other example that can be used for forming the monomer of ENB based copolymer comprises: α-ENB, 5-methyl-α-ENB, 5,5-dimethyl-α-ENB, 5-butyl-α-ENB, 5-ethylidene-α-ENB, 5-methoxycarbonyl-α-ENB, 5-cyano group-α-ENB, 5-methyl-5-methoxycarbonyl-α-ENB and 5-phenyl-α-ENB.The polymer of cyclopentadiene and derivative thereof (for example, bicyclopentadiene and 2,3-dihydro cyclopentadiene) also is an example.

The commercially available ENB based copolymer blend that gets comprises: Topas ^, ethylene-norbornene random copolymer (can derive from the Ticona company that is positioned at N.J. Summit city); Zeonor ^, alicyclic cyclic olefine copolymer (can derive from the Zeon Chemicals company that is positioned at Kentucky, USA Louisville city); Apel ^, ethylene-norbornene random copolymer (deriving from the Mitsui Chemicals company that is positioned at the Tokyo city); And Arton ^, derive from Japanese JSR company.The content that improves ENB composition in the copolymer can make T _gRaise.Have been found that useful especially is will have high T _gWith low T _gThe norbornene copolymer blend of different brackets to regulate compound T _g

Preferably, selecting ENB is that the polymer of cycloolefin layer is formed, and makes it basicly stable under at least about-35 ℃ to 85 ℃ temperature range.Though it is normally flexible that ENB is the cycloolefin layer, its length or width can not expand significantly in-35 ℃ to 85 ℃ temperature range.

ENB be the cycloolefin layer comprise usually as key component, glass transition temperature (T _g) ENB that shows as 85-200 ℃ (being more typically 100-160 ℃) is the cyclic olefine copolymer material.In some embodiments, selecting ENB is that cyclic olefine copolymer makes it to be extruded, and keeps transparent after high temperature process.ENB is that cycloolefin film or layer are normally transparent or substantially transparent.

Prepare Topas ^The multiple blend of polymer, and with the dynamic mechanical analysis method it is estimated.These blends are listed in the table 1.Under 0.1 hertz modulating frequency, each sample is scanned, thereby measure modulus and the glass transition temperature (T that changes along with temperature from 0 ℃ to 180 ℃ _g).Table 1 has been listed the composition and the physical property of ENB based copolymer blend.

Table 1

Sample is formed (%)	Modulus (25 ℃) (GPa)	Modulus (85 ℃) (GPa)	T g (℃)
				45/55Topas 8007/6013	2.18	1.21	99.0
30/70Topas 8007/6013	2.21	1.63	110.0
				15/85Topas 8007/6013	2.20	1.59	124.0
Topas 6013	2.46	1.91	137.0

ENB is the visual applicable cases of the thickness of cycloolefin layer and becoming.Yet ENB is that the thickness of cycloolefin layer is generally 0.1 to 15 mil (about 2 to 250 microns).

Multiple blooming is fit to use with the disclosure.Specifically, polymeric optical films (polymeric optical films that comprises orientation) is fit to use with the disclosure, and this is because they occur the unsettled situation of size sometimes when standing temperature fluctuation.

Specifically, ENB is that the cycloolefin layer is suitable for using together with the polymer film that will benefit from dimensional stability.In some embodiments, be that cycloolefin is being coated on the blooming above extruding under 250 ℃ the temperature with the adhesive articulamentum with ENB.In other embodiments, applying ENB with laminating method is the cycloolefin layer.In another embodiment of the present disclosure, after removing strippable coarse top layer, with ENB is that the cycloolefin layer adheres on the curable material layer, perhaps, at with the opposing face in strippable coarse top layer, with ENB is that the cycloolefin layer adheres on the layer of curable materials, as the title of owning together in submission on October 29th, 2004 is the U.S. Patent application No.10/976 of " Optical Films Incorporating CyclicOlefin Copolymers ", described in 675.In addition, described in above-mentioned same application, the layer of this curable materials can load-bearing surface structure (for example, prism structure), perhaps can adhere to again on other the layer or blooming.

The blooming 12,22 and 32 that Fig. 1, Fig. 2 and Fig. 3 illustrate respectively can comprise multilayer dielectricity blooming (all constituted or all be made of the isotropism optical layers by the birefringence optical layers, or part is made of the birefringence optical layers) (for example DBEF and ESR) and the blooming that comprises decentralized photo and continuous phase.Exemplary suitable continuous phase/decentralized photo blooming comprises the diffuse reflective polarizing sheet (for example, DRPF).The blooming 22 and 32 of Fig. 2 and exemplary shown in Figure 3 can comprise prism film (for example BEF) or other blooming, wherein said other blooming has patterned surface, and is configured to make patterned surface back to strippable coarse top layer 28 or 38.

Those ordinarily skilled in the art will recognize easily, structure as herein described, method and technology applicable to and can be applicable to the suitable blooming of other type.The blooming that this paper specifically mentioned only is an illustrative example, and has not meant that to be fit to the blooming that uses with exemplary of the present disclosure exhaustive.

Be suitable for illustrative optical film of the present disclosure and comprise laminated reflective film, for example, in for example U.S. Patent No. 5,882,774 and 6,352,761 and PCT open No.WO95/17303, WO95/17691, WO95/17692, WO95/17699, WO96/19347 and WO99/36262 described in those laminated reflective films, all these patent documentations all are incorporated herein with way of reference.The refringence between at least two kinds of different materials (being generally polymer) of all depending on reflection multilayer blooming and continuous phase/decentralized photo anacamptics film optionally reflects the light of at least one polarization direction.Suitable diffuse reflective polarizer comprises (for example) U.S. Patent No. 5, continuous phase described in 825,543/decentralized photo blooming and (for example) U.S. Patent No. 5,867, diffuse reflection optics film described in 316, described document is all incorporated this paper by reference into.

In some embodiments, blooming is for having very large Brewster angle (p polarised light reflectivity be zero incidence angle) or not having polymeric layer multi-stacked of Brewster angle.Multi-layer optical film can be made to the reflectivity of p polarised light with incidence angle slowly reduce away from normal, constant or the multilayer mirror or the polarizer that raise.The reflection multilayer blooming is used for illustrating the structure of blooming and the method for manufacturing and use disclosure blooming in this article as an example.As indicated above, herein the structure of Miao Shuing, method and technology applicable to and can be applicable to the suitable blooming of other type.

For example, suitable multi-layer optical film can by with birefringence first optical layers of uniaxial orientation or biaxial orientation and second optical layers alternately (as alternately inserting) pile up and form.In some embodiments, second optical layers has isotropic refractive index, and this refractive index is approximately equal to one of interior refractive index of face of oriented layer.Interface between two kinds of different optical layers forms the light plane of reflection.The refractive index approximately equal of two layers on certain orientation, the light of polarization is seen through basically in the plane parallel with this direction.Two layers have different refractivity on certain orientation, and light to the small part of polarization is reflected in the plane parallel with this direction.Reflectivity can increase or increase with the increase of the refringence between first kind of layer and the second kind of layer with the number of plies.

Film with a plurality of layers can comprise the layer with different optical thickness, to increase the reflectivity of film in a certain wave-length coverage.For example, film can comprise paired layer, and (for example for vertical incidence light) adjusts each described layer independently, with the best reflection of the light of realizing specific wavelength.Usually, the multi-layer optical film that is fit to use with particular of the present disclosure has about 2 to 5000 optical layers, has about 25 to 2000 optical layers usually, is generally about 50 to 1500 optical layers or about 75 to 1000 optical layers.In addition, though should be understood that may only describe single one multi-stacked, thereby can stack or dissimilar bloomings makes up subsequently to form film and stacked or dissimilar bloomings is produced multi-layer optical film by a plurality of a plurality of.Described multi-layer optical film can be according to U.S. Patent application No.09/229,724 and U.S. Patent Application Publication No.2001/0013668 produce, these two pieces of documents are all incorporated this paper by reference into.

Polarizer can combine by first optical layers and second optical layers with uniaxial orientation, and wherein the isotropic refractive index of second optical layers is approximately equal to one of interior refractive index of face of oriented layer.Perhaps, two kinds of optical layers are all formed by birefringent polymer, are orientated in drawing process then, make refractive index approximately equal on a single in-plane direction.Interface between these two kinds of optical layers has formed the light plane of reflection for a kind of light polarization.The refractive index approximately equal of these two layers on certain orientation, the light of polarization is basically by transmission in the plane parallel with this direction.These two layers have different refractivity on certain orientation, and light to the small part of polarization is reflected in the plane parallel with this direction.For the polarizer that contains second optical layers with isotropic refractive index or low coplane birefringence (for example being about 0.07 to the maximum), refractive index (n in the face of this second optical layers _xAnd n _y) be approximately equal to (n for example of refractive index in the face of first optical layers _y).Therefore, the coplane birefringence of first optical layers is the indication of the reflectivity of multi-layer optical film.Usually, find that the coplane birefringence is high more, the reflectivity of multi-layer optical film is good more.If the outer refractive index (n of the face of first optical layers and second optical layers _z) equate or approaching equating (for example difference is 0.1 to the maximum, and preferred difference is 0.05 to the maximum) that then multi-layer optical film still has more excellent oblique angle reflectivity (off-angle reflectivity).

Can use at least a single axial birefringence material to produce speculum, in this material, have two refractive indexes (along x and y axle, perhaps to be called n usually _xAnd n _y) approximately equal, and these two refractive indexes are different from the third reflect rate and (usually along the z axle, perhaps are called n _z).X and y axle are defined as axle in the face, because the plane of given layer in their expression multilayer films, and its refractive index n separately _xAnd n _yBe called as refractive index in the face.A method creating the single axial birefringence system is that multi-layer polymer film is carried out biaxial orientation (stretching along two axles).If adjacent layer has different stress induced birefringences, then the biaxial orientation of multilayer film can cause producing difference between the refractive index of adjacent layer when two axles of its plane and this are parallel, thereby produces the reflection of light on two plane of polarizations.

The single axial birefringence material can have positive or negative single axial birefringence.As refractive index (n in the z direction _z) greater than refractive index (n in the face _xAnd n _y) time, negative single axial birefringence takes place.As refractive index (n in the z direction _z) less than refractive index (n in the face _xAnd n _y) time, positive single axial birefringence takes place.If the n that selects _1zMeet n _2x=n _2y=n _2zAnd first kind of layer in the plural layers is biaxial orientation, then do not have Brewster angle for the p-polarised light, therefore all has constant reflectivity for all incidence angles.The multilayer film that is orientated on two mutually perpendicular coplane axles can reflect the very incident light of high percent, and this percentage depends on the number of plies, f ratio, refractive index etc., and this multilayer film is efficient speculum.Preferably, first optical layers is the birefringent polymer layer of uniaxial orientation or biaxial orientation.Usually the birefringent polymer of selecting first optical layers is can form big birefringence when stretching.According to situation about using, can be between two orthogonal directions on the membrane plane, at one or more in-plane directions and between perpendicular to the direction of this membrane plane or its be combined to form birefringence.First polymer should keep birefringence after stretching, can give the optical property of final film with expectation.Second optical layers can be birefringence and be the polymeric layer of uniaxial orientation or biaxial orientation, perhaps second optical layers can have with first optical layers orientation after refractive index at least one different isotropic refractive index.Advantageously, second polymer forms birefringence seldom or does not produce birefringence after stretching, perhaps form the birefringence (just-negative or negative-just) of opposite sense, make its membrane plane refractive index different with the refractive index of first polymer in the final film as much as possible.Use for great majority, first polymer and second polymer described film in the interested spectral bandwidth all the situation without any absorption band be favourable.Therefore, the incident light of all in spectral bandwidth is reflected or by transmission.Yet, use for some, what come in handy is that one or two in first polymer and second polymer completely or partially absorbs specific wavelength.

The material that is suitable for being manufactured on the blooming that uses in the exemplary of the present disclosure comprises polymer, for example, and polyester, copolyester and modified copolyesters.In this article, term " polymer " " be understood to include homopolymers and copolymer and can by for example coextrusion or reaction (comprising (for example) ester exchange reaction) form can miscible blend polymer or copolymer.Term " polymer " " and " copolymer " both comprised random copolymer, comprise block copolymer again.The polyester that is suitable in some illustrative optical film of the optical bodies of constructing according to the disclosure generally includes carboxylate and glycol subunit, and can be produced by carboxylate monomer molecule and glycol monomer molecule reaction.Each carboxylate monomer molecule has two or more carboxylic acids or ester functional group, and each glycol monomer molecule has two or more hydroxy functional groups.Carboxylate monomer molecule can be all identical, perhaps may have two or more dissimilar molecules.Situation for glycol monomer molecule also is like this.Term " polyester " also comprises the Merlon derived from the reaction of the ester of glycol monomer molecule and carbonic acid.

Be applicable to that the carboxylate monomer molecule that forms the carboxylate subunits in the polyester layer comprises (for example): 2,6-naphthalenedicarboxylic acid and isomers thereof; Terephthalic acid (TPA); M-phthalic acid; Phthalic acid; Azelaic acid; Adipic acid; Decanedioic acid; The ENB dioctyl phthalate; The double-octane dioctyl phthalate; 1,6-cyclohexane cyclohexanedimethanodibasic and isomers thereof; Tert-butyl isophthalic acid, trimellitic acid, sodiosulfoisophthalic acid; 2,2 '-xenyl dioctyl phthalate and isomers thereof; And these sour lower alkyl esters, such as methyl esters or ethyl ester.Term herein " low alkyl group " is meant the straight or branched alkyl of C1-C10.

Be applicable to that the glycol monomer molecule that forms the glycol subunit in the polyester layer comprises: ethylene glycol; Propane diols; 1,4-butanediol and isomers thereof; 1, the 6-hexylene glycol; Neopentyl glycol; Polyethylene glycol; Diethylene glycol (DEG); The tristane glycol; 1,4-cyclohexanedimethanol and isomers thereof; The norcamphane glycol; The double-octane glycol; Trimethylolpropane; Pentaerythrite; 1,4-benzene dimethanol and isomers thereof; Bisphenol-A; 1,8-dihydroxybiphenyl and isomers thereof; And 1, two (2-hydroxyl-oxethyl) benzene of 3-.

A kind of exemplary polymer that can be used in the blooming of the present disclosure is PEN (PEN), and it can prepare by for example making naphthalenedicarboxylic acid and glycol reaction.Gather 2,6-(ethylene naphthalate) (PEN) is selected first polymer that is used as often.PEN has big positive stress optical coefficient, keeps birefringence after stretching effectively, and in the visible range seldom absorption or not absorption is arranged.PEN also has the big refractive index under the isotropic state.Its refractive index for the incident polarized light of 550nm wavelength is raised to up to about 1.9 from about 1.64 when plane of polarization is parallel to draw direction.Increasing molecularly oriented can make the birefringence of PEN increase.Can by with material extending to bigger draw ratio and keep other the constant molecularly oriented that increases of stretching condition.Other semicrystalline polyester that is suitable as first polymer comprises that (for example) is poly-2,6-naphthalenedicarboxylic acid butanediol ester (PBN), PETG (PET) and copolymer thereof.

Should select second polymer of second optical layers to make that the refractive index of its at least one direction in final film is significantly different with the refractive index of first polymer of equidirectional.Because polymeric material is generally chromatic dispersion, that is to say that its refractive index changes with wavelength, should in the particular spectral bandwidth of being paid close attention to, consider these conditions.The predetermined application of the multi-layer optical film of being discussed is not only depended in the selection that is appreciated that second polymer from above-mentioned discussion, and depends on the selection and the processing conditions of first polymer.

Other material (especially being suitable as other material of first polymer of first optical layers) that is applicable to blooming is in for example U.S. Patent No. 6,352,762 and 6,498,683 and U.S. Patent application No.09/229724,09/232332,09/399531 and 09/444756 in describe, described document is all incorporated this paper by reference into.The another kind of polyester that can be used as first polymer is coPEN, it has derived from the carboxylate subunits of the dimethyl terephthalate (DMT) of the naphthalene diformic acid dimethyl ester of 90 moles of % and 10 moles of % with derived from the glycol subunit of the ethylene glycol subunit of 100 moles of %, and has the inherent viscosity (IV) of 0.48dL/g.The refractive index of this polymer is about 1.63.This polymer is referred to herein as eutectic PEN (90/10).The another kind of first useful polymer is that inherent viscosity is the PET of 0.74dL/g, and this PET can derive from EastmanChemical company (being positioned at the Kingsport city of tennessee,USA).Non-polyester polymers also can be used for making polarizer film.For example, PEI can use with polyester (for example PEN and coPEN), to produce the multilayer reflective mirror.Can use other polyester/non-polyester combination, such as PETG and polyethylene (for example, those polyethylene of the commodity that can obtain Engage 8200 by name) from the Dow Chemical company that is positioned at the Michigan, USA Midland.

Second optical layers can be made by multiple polymers, and wherein the glass transition temperature of this polymer is consistent with the glass transition temperature of first polymer, and the refractive index of this polymer is similar to the isotropic refractive index of first polymer.Be applicable to that example in the blooming (being particularly useful for second optical layers), that be different from other polymer of above-mentioned CoPEN polymer comprises polyvinyl and the copolymer that is made of monomer (for example vinyl naphthalene, styrene, maleic anhydride, acrylate and methacrylate).The example of this polymer comprises: polyacrylate; Polymethacrylates, such as poly-(methyl methacrylate) (PMMA); And isotactic or syndyotactic polystyrene.Other polymer comprises condensation polymer, for example polysulfones, polyamide, polyurethane, polyamic acid and polyimides.In addition, can form second optical layers by polymer and copolymer (for example polyester and Merlon).

Other suitable exemplary polymer (especially being applicable to the exemplary polymer of second optical layers) comprises the homopolymers of polymethyl methacrylate (PMMA) or polyethyl methacrylate (PEMA), described polymethyl methacrylate (PMMA) can be those PMMA such as the commodity that obtain from the Ineos Acrylics company that is positioned at Delaware, USA Wilmington city CP71 by name and CP80, and the glass transition temperature of described polyethyl methacrylate (PEMA) is lower than PMMA.Second polymer in addition comprises the copolymer (coPMMA) of PMMA, be that 75% methyl methacrylate (MMA) monomer and percentage by weight are the coPMMA (can derive from Ineos Acrylics company, commodity are called Perspex CP63) that 25% ethyl acrylate (EA) monomer is made for example by percentage by weight, the coPMMA that forms by MMA comonomer unit and n-BMA (nBMA) comonomer unit, or (PVDF) blend of (such as the product of the commodity that can derive from the SolvayPolymers company that is positioned at Houston, Texas, United States city Solef 1008 by name) of PMMA and poly-(vinylidene fluoride).

In addition, other suitable polymers (especially being applicable to the polymer of second optical layers) comprises polyolefin copolymer, such as the commodity that can derive from Dow-Dupont Elastomers company Engage 8200 by name poly-(ethene-co-octene) (PE-PO), can derive from the Fina Oil and Chemical company that is positioned at Texas, USA Dallas city commodity Z9470 by name poly-(propylene-co-ethene) (PPPE), the commodity that can derive from the HuntsmanChemical company that is positioned at the Salt Lake City, Utah, United States city are called the atactic polypropylene (aPP) of Rexflex W111 and the copolymer of isotactic polypropylene (iPP).Blooming can also (for example) comprise functionalized polyolefin in second optical layers, for example linear low density polyethylene (LLDPE)-g-maleic anhydride (LLDPE-g-MA) is (such as deriving from the E.I.DuPont de Nemours ﹠amp that is positioned at Delaware, USA Wilmington city; Co., the LLDPE-g-MA of the commodity of Inc. Bynel 4105 by name).

In the situation of polarizer, the combination of exemplary material comprises PEN/co-PEN, PETG (PET)/co-PEN, PEN/sPS, PEN/Eastar and PET/Eastar, wherein " co-PEN " is meant copolymer or the blend (as mentioned above) based on naphthalenedicarboxylic acid, and Eastar is can be available from the poly terephthalic acid hexamethylene dimethyl ester of Eastman Chemical company.In the situation of speculum, the combination of exemplary material comprises PET/coPMMA, PEN/PMMA or PEN/coPMMA, PET/ECDEL, PEN/ECDEL, PEN/sPS, PEN/THV, PEN/co-PET and PET/sPS, wherein " co-PET " is meant copolymer or the blend (as mentioned above) based on terephthalic acid (TPA), ECDEL is can be available from the thermoplastic polyester of Eastman Chemical company, and THV is can be available from the fluoropolymer of 3M company.PMMA is meant polymethyl methacrylate, and PETG is meant the copolymer of the PET that uses second kind of glycol (being generally cyclohexanedimethanol).SPS is meant syndyotactic polystyrene.

The suitable blooming that uses with the disclosure is thinner usually.Suitable film may have different thickness, but particularly, and suitable film comprises that thickness is less than 15 mils (about 380 microns), more generally less than 10 mils (about 250 microns), preferably less than the film of 7 mils (about 180 microns).During processing, can the dimensionally stable layer be incorporated in the blooming by the mode of under surpassing 250 ℃ temperature, extruding coating or coextrusion.In addition, during processing, blooming can experience various bendings and coiling step usually, and therefore, in typical exemplary of the present disclosure, film should be flexible.The blooming that is suitable in the exemplary of the present disclosure can also have optional optical layers or non-optical layers (for example, the one or more protectiveness boundary layer between the optical layers bag).Non-optical layers can be to be suitable for the concrete any suitable material of using, and, can be or can comprise at least a material of the remainder that is used for blooming.

In some exemplary, intermediate layer or subsurface stratum can form with blooming.For example, one or more subsurface stratums are usually by come out forming with the blooming co-extrusion, thereby form and bond first kind of layer and second kind of layer.For example, by with intermediate layer coextrusion simultaneously or be expressed in succession on the blooming, this intermediate layer can be formed on the blooming integratedly or dividually.

In typical embodiment of the present disclosure, after strippable coarse top layer is removed, ENB is that the roughness on cycloolefin film surface should enough produce at least some mist degrees, and perhaps should fully help to reduce ENB of the present disclosure is the wetting action of cycloolefin film to other component.The ENB that is suitable for some exemplary is that the mist degree amount of cycloolefin film comprises: about 5% to about 95%, about 20% to about 80%, about 50% to about 90%, about 10% to about 30% and about 35% to about 80%.Other application may be wished the mist degree of other amount.In other exemplary, after strippable coarse top layer is removed, ENB is that the roughness on cycloolefin film surface should enough produce the light of at least some changed courses, should prevent enough that perhaps ENB from being cycloolefin film surface and glass or other surperficial combination.For example, use, find that the surface texture of about 0.2 micron-scale is just enough for some.

Material compatibility and method

Preferably, material in the material of blooming and first optical layers in some exemplary, second optical layers, optional non-optical layers and the strippable coarse top layer is chosen to (for example to have the similar rheological equationm of state, melt viscosity), make them the situation of flowing instability can not be occurred by coextrusion.Usually, second optical layers, optional other non-optical layers and strippable coarse top layer have such glass transition temperature T _g, this glass transition temperature is lower than or is not higher than the above about 40 ℃ temperature of glass transition temperature of first optical layers.It is desirable to, the glass transition temperature on second optical layers, optional non-optical layers and strippable coarse top layer is lower than the glass transition temperature of first optical layers.When using length orientation (LO) roller to come multi-layer optical film is orientated, may not can use to have desirable low T _gSkin-material, this is because low T _gMaterial can roll banding.If do not use the LO roller, and be to use (for example) simo-biax stenter, then just do not have the problem of this restriction.

In some embodiments, when strippable coarse top layer is removed, can residual material or any relevant adhesive (if you are using) on strippable coarse top layer down.Optional is whether as indicated above, strippable top layer comprises dyestuff, pigment or other coloured material, still be positioned on the optical bodies thereby observe strippable top layer easily.This can help the correct use of optical bodies.Strippable top layer has the thickness of at least 0.5 mil or 12 microns usually, and is still required according to application-specific, the top layer that can prepare other thickness (thicker or thinner).

Have several different methods can be used to form optical bodies of the present disclosure, these methods can comprise extrudes blending method, coetrusion, film casting quench method, stacked alignment method.As indicated above, optical bodies can adopt various structures, and therefore, the method that is adopted changes along with the different of the required character of structure and final optical bodies.

Example

Can make up exemplary of the present disclosure according to the detailed description in the following example.

Example 1

Three layers of casting films of preparation coextrusion, its general structure schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is formed by the polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification.In this illustrative example, layer 54 and 58 plays and prevents that adjacent ENB from being the effect of the contaminated or scratch in cycloolefin layer 52 surface.In the following process process of optical bodies, layer 54 and 58 also plays the effect of 52 bearing bed, and this is because some cyclic olefine copolymers itself are exactly the material that is highly brittle.ENB in the optical bodies 50 be cycloolefin layer 52 are 2.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains 0.25% the Palmowax that derives from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer formed by the Eastar 6763 of the PolybatchDUL3636DP12 blend that contains 5 weight % (deriving from A.Schulman company).The Polybatch material is 50%/50% the random copolymer of propylene and the blend of medium density polyethylene.

Three layers films (optical bodies 50) are spread on the chromium roller, and cool to room temperature.From ENB is peel ply 58 and 54 on the cycloolefin layer 52, obtains having the cyclic olefine copolymer film of 8% level of haze, and this level of haze is to use BYK-Gardner Hazegard Plus haze meter to measure according to the method described in the ASTM D 1003.Use foregoing method, determine that from ENB be 180 ° of required peeling forces of peel ply 58 on the cycloolefin layer 52, measurement result is 2.8 gram/inches.

Remove a part respectively from five zones that separate of traversing optical bodies 50.Remove part at each, with layer 58 and 52 with separate, install them into then on the aluminium seat, to observe matching surface.The equal dash coat of all samples has gold/palladium, and, use the FEI XL30 environmental scanning electron microscope (ESEM) of under the high vacuum pattern, working that all samples is checked.

Fig. 5 and representational digital micro-analysis photo shown in Figure 6 are to use secondary electron imaging (SEI) technology that the configuration of surface imaging is obtained.All microphotos all are to take at 45 ° the place, visual angle that departs from film surface.Fig. 5 is that ENB is the digital micro-analysis photo of cycloolefin layer 52.Fig. 6 is the digital micro-analysis photo on strippable coarse top layer 58.

Use Wyko NT-3300 surface scan system to determine the surface topography of layer 52 and layer 58.Use has 50 times of object lens of 0.5 times multiplier, in the full VIS of resolution pattern, operate this instrument with 1% modulation threshold.Check three zones on each sample.Table 2 has been summed up the result of measuring surface form.

Table 2

Sample	The position	The zone	Ra(um)	Rq(um)	Rp(um)	Rv(um)	Rt(um)	Rz(um)
									COC film top layer, COC film top layer, mean value standard deviation COC film top layer, COC film top layer, COC film top layer, mean value standard deviation COC film top layer, COC film top layer, COC film top layer, COC film substrate COC film substrate COC film substrate mean value standard deviation COC film substrate COC film substrate COC film substrate mean value standard deviation COC film substrate COC film substrate COC film substrate mean value standard deviation COC film top layer mean value standard deviation	1 1 1 3 3 3 5 5 5 1 1 1 3 3 3 5 5 5	1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3	0.16 0.15 0.15 0.15 0.01 0.14 0.13 0.15 0.14 0.01 0.16 0.13 0.14 0.14 0.01 0.15 0.16 0.14 0.16 0.01 0.16 0.15 0.16 0.16 0.00 0.15 0.16 0.17 0.16 0.01	0.24 0.21 0.21 0.22 0.02 0.20 0.19 0.21 0.20 0.01 0.23 0.19 0.20 0.21 0.02 0.23 0.23 0.21 0.23 0.01 0.24 0.22 0.24 0.23 0.01 0.23 0.24 0.25 0.24 0.01	0.90 1.42 0.88 1.07 0.30 0.86 0.73 0.94 0.84 0.10 0.91 0.97 1.01 0.96 0.05 2.59 2.07 1.82 2.16 0.39 2.60 2.16 2.44 2.40 0.22 2.71 2.20 2.31 2.41 0.27	-2.50 -2.03 -1.99 -2.17 0.28 -1.79 -1.92 -1.99 -1.90 0.10 -2.11 -2.01 -1.70 -1.94 0.21 -0.74 -1.47 -0.63 -0.95 0.46 -0.75 -0.62 -0.74 -0.71 0.07 -0.91 -0.66 -0.76 -0.78 0.13	3.40 3.45 2.87 3.24 0.32 2.65 2.66 2.93 2.74 0.16 3.02 2.98 2.71 2.90 0.17 3.33 3.54 2.45 3.11 0.58 3.35 2.78 3.19 3.11 0.29 3.63 2.86 3.06 3.18 0.40	2.78 2.45 2.54 2.59 0.17 2.37 2.31 2.38 2.36 0.04 2.72 2.41 2.28 2.47 0.23 2.77 2.64 2.24 2.55 0.27 2.59 2.42 2.70 2.57 0.14 2.78 2.50 2.71 2.66 0.14

In table 2, Ra is the mean roughness that whole measurement array is calculated gained.Rq is a r.m.s. roughness of whole measurement array being calculated gained.Rt is the peak-valley difference that whole measurement array is calculated gained.Rz is the mean value of the peak-valley difference of ten maximums on the sample.

From ENB is cycloolefin optical bodies peel ply 58.Layer 52 to the gained optical bodies carries out nitrogen corona treatment.Use 2.5J/cm ²The corona energy carry out this processing operation.Use the acrylate composition of the UV-curable of about 1 mil to apply this optical bodies, then it is pressed onto on the knurling rolls with linear prism pattern.After coating, the coating that will have prismatic pattern immediately is exposed under the UV curing source.Use is cured with the web speed of 50 feet per minute clocks under nitrogen atmosphere with the Fusion D type lamp (F-600) of 100% power operation.Then, remove layer 54 from the optical bodies that forms thus, and, next, use the curable adhesive composition of 1 mil thick that this optical bodies is laminated on the side of multi-layer optical film (for example, can derive from the reflection multilayer formula polarizing coating DBEF of 3M company).From another sheet ENB is peel ply 58 on the cyclic olefine copolymer film, and, use the curable adhesive of 1 identical mil thick that this film is adhered on the opposition side of the DBEF film that passes through above-mentioned lamination operation.It is believed that the curable materials preparation contains nitrogenous aggretion type acrylate monomer and unazotized aggretion type acrylate monomer.

The luminance gain of particular optical film (that is, " gain ") is meant: the ratio of the transmitted intensity under the transmitted intensity that places the blooming on the given backlight or optical cavity (as illuminated teflon light cube (Teflon light cube)) and the situation that does not have blooming.Specifically, use can derive from the SpectraScan of the PhotoResearch company that is positioned at California, USA Chatsworth city ^TMThe PR-650 spectrocolorimeter is measured the transmitted intensity of blooming.In addition absorptive polarizers is placed SpectraScan ^TMBefore the PR-650 spectrocolorimeter.Then, specific blooming is placed on the teflon light cube.Use Fostec DCR II light source by fluorescent tube illumination light cube.Adopt this structure, gain under the situation about existing and remove the ratio of the transmitted intensity that records under the situation of this blooming at blooming.For having the blooming of reflective polarizer, the polarization that makes reflective polarizer is arranged in parallel by axle by the polarization of axle and absorptive polarizers.For described blooming in the present example, the polarization that the linear prism micro-structural is aligned to respect to absorptive polarizers becomes 45 degree by axle.The gain of this blooming prototype is 2.313.

Example 2

Three layers of casting films of preparation coextrusion, its general structure schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is by the Topas that wherein contains 5 weight % ^Cyclic olefine copolymer, form described Topas through the polyester (deriving from the Eastar 6763 of EastmanChemical company) of glycol modification ^Used Topas in the layer 52 of cyclic olefine copolymer and this structure ^Cyclic olefine copolymer is identical.Layer 54 in the optical bodies 50 contains the cyclic olefine copolymer material of 5 weight %, to change the frictional behaviour on top layer 54.Use I-MASS SP2000 slip-electronic stripping tester, measure the coefficient of friction of layer 54 according to the method among the ASTM D1894.For the unaltered layer that forms by polyester Eastar 6763 through glycol modification, the coefficient of friction in the time of can't measuring this layer and on himself, slides, this is that mechanism because of its slip relates to adhesion-sliding-type behavior.This sample generation self-adhesion is increased to sufficiently high degree up to sliding force, makes the test coaster overstep the limit in uncontrollable mode.Under using the situation of cyclic olefine copolymer as the additive in the layer 54, coefficient of friction is about 0.46.This makes film slide certainly easily on one's body.That side that contacts with layer 54 of layer 52 has about 4% level of haze.

ENB in the optical bodies 50 be cycloolefin layer 52 are 2.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer formed by the Eastar 6763 of the PolybatchDUL3636DP12 blend that contains 5 weight % (deriving from A.Schulman company).

Three layers films (optical bodies 50) are spread on the chromium roller, and cool to room temperature.From ENB is peel ply 58 and 54 on the cycloolefin layer 52, obtains having the cyclic olefine copolymer film of 13% level of haze, and this level of haze is to use BYK-Gardner Hazegard Plus haze meter to measure according to the method described in the ASTM D1003.Use foregoing method, determine that from ENB be 180 ° of required peeling forces of peel ply 58 on the cycloolefin layer 52, measurement result is 2.8 gram/inches.

From ENB is peel ply 58 on the cyclic olefine copolymer film.Layer 52 to the gained optical bodies carries out nitrogen corona treatment.Use 2.0J/cm ²The corona energy carry out this processing operation.Use the acrylate composition of the UV-curable of about 1 mil to apply this optical bodies, then it is pressed onto on the knurling rolls with linear prism pattern.After coating, the coating that will have prismatic pattern immediately is exposed under the UV curing source.Use is cured with the web speed of 50 feet per minute clocks under nitrogen atmosphere with the Fusion D type lamp (F-600) of 100% power operation.Then, remove layer 54 from the optical bodies that forms thus, and, next, use contact adhesive composition that this optical bodies is laminated on the side of multi-layer optical film (for example, can derive from the DBEF of 3M company).From another sheet ENB is peel ply 54 on the cyclic olefine copolymer film, and, use identical contact adhesive that this film is adhered on the opposition side of DBEF film.

The luminance gain of this blooming prototype is 2.222.

Example 3

In example 3, come the optical bodies of preparation example 1 fully according to foregoing method, difference is, makes the alternative curable resinous binder compositions of contact adhesive composition of use-case 2 realize stacked.The luminance gain of this blooming prototype is 2.296.

Example 4

Use the more weak extrusion condition of mixing intensity of comparing with example 1 and 2, prepare three layers of casting films of coextrusion.The general structure of this film schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is formed by the polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification.ENB in the optical bodies 50 be cycloolefin layer 52 are 2.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer formed by the Eastar 6763 of the Polybatch DUL3636DP12 blend (deriving from A.Schulman company) that contains 10 weight % to 40 weight %.

Table 3 has been summed up the mist degree of layer 52 layer 58 is removed after and 180 ° of peeling forces of removing layers 58 o'clock from layer 52.Peeling force shown in the table is the peeling force to the sample determination that downcuts along the length direction of optical bodies or machine direction.

Table 3

The composition of rete 58	After layer 52 is removed top layer 58, the mist degree (%) of layer 52	180 ° of peeling forces (gram/inch)
			10％Polybatch	5.0	2.8
20％Polybatch	11.8	2.4
			30％Polybatch	34.0	4.2
40％Polybatch	48.6	11.6

Remove layer 54 from the optical bodies that forms thus, then, make the contact adhesive composition of 1 mil thick described in the use-case 2, two optical bodies are laminated on the opposing both sides of multi-layer optical film (for example can derive from the DBEF of 3M company), thereby obtain laminated body.

Two representative samples in the use table 3 prepare laminated body.Use foregoing method, measure the mist degree and the luminance gain of these laminated body, with these outcome record in the routine 4a and 4b of table 4.

Table 4

The example numbering	The composition of rete 58	The mist degree of laminated body (%)	The luminance gain of laminated body
				4a	Contain 20%Polybatch among the Eastar 6763	25.9	1.663
4b	Contain 40%Polybatch among the Eastar 6763	72.8	1.612
				5a	Contain 20%Polybatch among the Voridian 7352	73.3	1.649
5b	Contain 10%Polybatch among the Capron B85QP	29.5	1.641

Example 5

Three layers of casting films of preparation coextrusion, its general structure schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is formed by poly-(ethylene glycol terephthalate) resin (deriving from the Voridian 7352 of Eastman Chemical company).ENB in the optical bodies 50 be cycloolefin layer 52 are 2.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer formed by the Voridian7352 of the Polybatch DUL3636DP12 blend (deriving from A.Schulman company) that contains 10 weight % to 30 weight %.

Table 5 has been summed up the mist degree of layer 52 layer 58 is removed after and 180 ° of peeling forces of removing layers 58 o'clock from layer 52.Peeling force shown in the table is the peeling force to the sample determination that downcuts along the length direction of optical bodies or machine direction.

Table 5

The composition of rete 58	After removing the top layer, the mist degree (%) of layer 52	180 ° of peeling forces (gram/inch) from layer 52 during peel ply 58
			10％Polybatch	16.2	1.5
20％Polybatch	48.2	4.8
			30％Polybatch	54.3	6.9

Remove layer 54 from the optical bodies that forms thus, then, make the contact adhesive composition of 1 mil thick described in the use-case 2, two optical bodies are laminated on the opposing both sides of multi-layer optical film (for example can derive from the DBEF of 3M company), thereby obtain laminated body.

Representative sample in the use table 5 prepares laminated body.Use foregoing method, measure the mist degree and the luminance gain of these laminated body, with these outcome record in the routine 5a of table 4.

Example 6

Three layers of casting films of preparation coextrusion, its general structure schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is formed by nylon-6 resin (deriving from the Capron B85QP of BASF AG).ENB in the optical bodies 50 be cycloolefin layer 52 are 2.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer formed by the Capron B85QP of the Polybatch DUL3636DP12 blend (deriving from A.Schulman company) that contains 10 weight % to 30 weight %.

Table 6 has been summed up the mist degree of layer 52 layer 58 is removed after and 180 ° of peeling forces of removing layers 58 o'clock from layer 52.Peeling force shown in the table is the peeling force to the sample determination that downcuts along the length direction of optical bodies or machine direction.

Table 6

The composition of rete 58	After removing the top layer, the mist degree (%) of layer 52	180 ° of peeling forces (gram/inch) from layer 52 during peel ply 58
			10％Polybatch	9.3	2.2
20％Polybatch	23.6	5.2
			30％Polybatch	36.6	31.1

Remove layer 54 from the optical bodies that forms thus, then, make the contact adhesive composition of 1 mil thick described in the use-case 2, two optical bodies are laminated on the opposing both sides of multi-layer optical film (for example can derive from the DBEF of 3M company), thereby obtain laminated body.

Representative sample in the use table 6 prepares laminated body.Use foregoing method, measure the mist degree and the luminance gain of these laminated body, with these outcome record in the routine 6a of table 4.

Example 7

Three laminar flows of preparation coextrusion prolong thin slice, and this thin slice has the protective layer of 6.0 mil thick, and this protective layer is formed by the polyester (deriving from the Eastar6763 of Eastman Chemical company) through glycol modification.ENB in the optical bodies be the cycloolefin layer be 8.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.Strippable coarse top layer in the optical bodies is the layer of 6.0 mil thick, and this layer formed by the Eastar 6763 of the PolybatchDUL3636DP12 blend that contains 5 weight % (deriving from A.Schulman company).Described three layers of thin slice are spread on the chromium roller, and cool to room temperature.This curtain coating thin slice is preheating to 165 ℃ temperature, then, stretches simultaneously with machine direction (MD) 2.1: 1,2.1: 1 ratio of stenter direction (TD).

ENB is that the thickness of cycloolefin layer is 2.2 mils, and level of haze is 2.5.Use foregoing method, determine that from ENB be cycloolefin layer required 180 ° of peeling force when peeling off described strippable coarse top layer, measurement result is 3.1 gram/inches.

From ENB is that cycloolefin film is peeled off described strippable coarse top layer, then, optical bodies is laminated on the both sides of multi-layer optical film (for example, can derive from the DBEF of 3M company).Use is positioned at curable adhesive composition on the both sides of DBEF film, 1 mil thick and carries out stacked.It is believed that the curable materials preparation contains nitrogenous aggretion type acrylate monomer and unazotized aggretion type acrylate monomer.The luminance gain of this sample is 1.702.

Example 8

Three layers of casting films of preparation coextrusion, its general structure schematically is shown among Fig. 4.Optical bodies 50 has the protective layer 54 of 1.5 mil thick, and this protective layer is formed by Noblen (deriving from the PP3571 of Total Petrochemicals company).

ENB in the optical bodies 50 be cycloolefin layer 52 are 5.0 mil thick, by the Topas that can derive from Ticona (Celanese) company ^The layer that cyclic olefine copolymer forms.ENB is that cycloolefin layer 52 also contains Palmowax 0.25%, that derive from Acme-Hardesty company ^Ethylenebisstearamide (EBS) lubricant.The layer that strippable coarse top layer 58 in the optical bodies 50 is 1.5 mil thick, this layer (derives from the MarFlex of Chevron Phillips Chemical company by the high density polyethylene (HDPE) that contains 30 weight % ^TMHHMTR-130) PP3571 forms.

Three layers films (optical bodies 50) are spread on the chromium roller, and cool to room temperature.Using foregoing method, is peel ply 58 and 54 on the cycloolefin layer 52 from ENB, obtains having the cyclic olefine copolymer film of 40% level of haze.Use an oolemma Scotch respectively ^355 with top layer 54 and 58 reinforcings, use foregoing method then, measure 180 ° of peeling forces.After measured, be that peel ply 54 required peeling forces are 328.3 gram/inches on the cycloolefin layer 52 from ENB.After measured, be that peel ply 58 required peeling forces are 863.3 gram/inches on the cycloolefin layer 52 from ENB.

Example 9

The strippable top layer blend of various exemplary has been described in table 7.These blends are applied as strippable coarse top layer, and according to the method for general description in the example 1 their stripping performance are tested.The result proves, these blends are to strip down (being that the adhesion of cycloolefin rete is enough low to ENB, to such an extent as to can be removed for example) on the cycloolefin rete neatly from ENB in flakes all.Based on visual examination, these strippable coarse top layers are the mist degree that the cycloolefin layer has been given desired level to ENB also.This top layer especially can be used at pocket.

Table 7

Less important phase/decentralized photo	Main phase/continuous phase
		10% high density polyethylene (HDPE) (deriving from the MarFlex 9607XD of Chevron Phillips company), 10% Noblen (deriving from the Total 3571 of Total Petrochemicals company)	80% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification
10% high density polyethylene (HDPE) (deriving from the MarFlex 9607XD of Chevron Phillips company), 10% PB Polybutene-1 (deriving from the PB 0300M of Basell Polyolefins company)	80% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification
		10% high density polyethylene (HDPE) (deriving from the MarFlex 9607XD of Chevron Phillips company), 10% Noblen (deriving from the Total 3571 of Total Petrochemicals company)	80% PETG (deriving from the Photo EC PET 65100 of 3M company)
10% high density polyethylene (HDPE) (deriving from the MarFlex 9607XD of Chevron Phillips company), 10% PB Polybutene-1 (deriving from the PB 0300M of Basell Polyolefins company)	80% PETG (deriving from the Photo EC PET 65100 of 3M company)
		10% Noblen (deriving from the Total 3571 of Total Petrochemicals company), 10% PB Polybutene-1 (deriving from the PB 0300M of Basell Polyolefins company)	80% PETG (deriving from the Photo EC PET 65100 of 3M company)

Other Comparative Examples is provided in the table 8.The described strippable coarse top layer of table 8 is not that the cycloolefin layer is given measurable mist degree to ENB.These strippable coarse top layers are that the cycloolefin layer shows enough adhesive attractions really to ENB, and can be stripped from neatly.

Table 8

Less important phase/decentralized photo	Main phase/continuous phase
		5% nylon-6 (deriving from the Capron B85QP of BASF AG)	95% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification
5% medium density polyethylene (deriving from the Marlex 9235 of Chevron Phillips company)	95% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification
		20% medium density polyethylene (deriving from the Marlex 9235 of Chevron Phillips company)	80% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification
10% Noblen (deriving from the Total 3571 of Total Petrochemicals company)	90% polyester (deriving from the Eastar 6763 of Eastman Chemical company) through glycol modification

Predictive example 10

Can prepare four layers of casting films of coextrusion, its general structure schematically is shown among Fig. 7.It is cycloolefin layer 72 and strippable top layer 78 that multilayer film shown in Figure 7 has blooming 74, adhesive phase 73, ENB.Strippable top layer 78 and ENB are that a surface of cycloolefin layer 72 is operably connected, and ENB is that another (opposing) surface of cycloolefin layer 72 then is set on the surface of blooming 74 by means of adhesive phase 73.In other example, can layer 73,72 and 78 be arranged on two surfaces of blooming 74 according to similar methods, thereby form symmetrical optical bodies.

ENB in the optical bodies 70 be cycloolefin layer 72 can be 2.0 mil thick, by the Topas that can derive from Ticona (Celanese AG) company ^The layer that cyclic olefine copolymer forms.This layer 72 can also contain Palmowax ethylenebisstearamide 0.25%, that derive from Acme-Hardesty company (EBS) lubricant.The layer that strippable coarse top layer 78 in the optical bodies 70 can be 1.5 mil thick, it contains the blend that the Polybatch DUL3636DP12 blend (deriving from A.Schulman company) by the Eastar6763 of 60 weight % to 95 weight % and 5 weight % to 40 weight % forms.The Polybatch material is 50%/50% the random copolymer of propylene and the blend of medium density polyethylene.Articulamentum 73 can be by being constituted by maleic anhydride modified polyolefin.Additional optical film 74 can be by to carrying out multi-layer optical film that coextrusion and orientation process obtain (for example, DBEF) as the PET of first high-index material with as the coPET of second low-index material.

Though the present invention has been described in reference specifically described illustrative example herein,, those skilled in the art will appreciate that under the situation that does not break away from essence of the present disclosure and scope, can change with regard to form of the present disclosure and details.

Claims (24)

1. optical bodies, this optical bodies has:

ENB is the cycloolefin rete; And

At least one strippable coarse top layer, it is that the surface of cycloolefin rete is operably connected with described ENB, described at least one strippable coarse top layer comprises continuous phase and decentralized photo.

2. the described optical bodies of claim 1, wherein, when removing described strippable coarse top layer, described ENB is that the described surface of cycloolefin rete is characterised in that, its mist degree is about 5% to 95%.

3. the described optical bodies of claim 1, wherein, described decentralized photo comprises polymer, and this polymer and described continuous phase is unmixing basically.

4. the described optical bodies of claim 3, wherein, described at least one strippable coarse top layer also comprises nucleator.

5. the described optical bodies of claim 3, wherein, the described crystallinity of polymer in the described decentralized photo is higher than the degree of crystallinity of described continuous phase.

6. the described optical bodies of claim 1, wherein, described decentralized photo comprises at least a in the following substances: inorganic material, SAN, polystyrene, medium density polyethylene, modified poly ethylene, PB Polybutene-1, the blend that is formed by Merlon and copolyester, ENB based copolymer, 6-caprolactone polymer, Noblen, random copolymer of propylene, poly-(ethylene-octene) copolymer, the polymer that shows antistatic property, high density polyethylene (HDPE), LLDPE and poly-(methyl methacrylate).

7. the described optical bodies of claim 1, wherein, described continuous phase comprises at least a in the following substances: PETG (PET), polybutylene terephthalate (PBT) (PBT); PETG (PETG) through glycol modification; PEN (PEN) and (ethylene naphthalate) copolymer (CoPEN); Nylon-6; Merlon and polycarbonate Alloys; Syndiotactic polypropylene; Noblen; LLDPE; And the random copolymer of propylene and ethene.

8. the described optical bodies of claim 1, wherein, described optical bodies also has blooming, this blooming is on the cycloolefin rete attached to described ENB, and described blooming is selected from: multilayer polarizer, mattress reflector, the diffuse reflective polarizing sheet with continuous phase and decentralized photo, the layer that comprises SAN, the layer that comprises Merlon, the layer that comprises PET, the layer that comprises curable materials, the layer that comprises present cycloaliphatic polyesters/Merlon and their any amount of any combinations.

9. the described optical bodies of claim 8, wherein, described blooming is on the cycloolefin rete by articulamentum attached to described ENB.

10. the described optical bodies of claim 1, wherein, described optical bodies has at least two strippable coarse top layers.

11. the described optical bodies of claim 1, wherein, described strippable coarse top layer also comprises colouring agent.

12. the described optical bodies of claim 1, wherein, described optical bodies is transparent basically.

13. the described optical bodies of claim 1, described optical bodies also have at least one smooth extexine, described at least one smooth extexine places on described at least one strippable coarse top layer.

14. the described optical bodies of claim 1, wherein, described ENB is that the cycloolefin rete also comprises lubricant.

15. an optical bodies, this optical bodies has:

ENB is the cycloolefin rete; And

At least one strippable coarse top layer, it is that the cycloolefin rete is operably connected with described ENB, described at least one strippable coarse top layer comprises:

First polymer,

Second polymer, they are different with described first polymer, and

Additional materials, at least one of itself and described first polymer and described second polymer be unmixing basically.

16. the described optical bodies of claim 15, wherein, described first crystallinity of polymer is lower than described second crystallinity of polymer.

17. the described optical bodies of claim 15, wherein, described first polymer is selected from: PETG (PET), polybutylene terephthalate (PBT) (PBT); PETG (PETG) through glycol modification; PEN (PEN) and (ethylene naphthalate) copolymer (CoPEN); Nylon-6; Merlon and polycarbonate Alloys; Syndiotactic polypropylene; Noblen; LLDPE; And the random copolymer of propylene and ethene.

18. the described optical bodies of claim 15, wherein, described second polymer is selected from: SAN, polystyrene, medium density polyethylene, modified poly ethylene, the blend, ENB based copolymer, PB Polybutene-1,6-caprolactone polymer, random copolymer of propylene, poly-(ethylene-octene) copolymer, anti-electrostatic polymer, high density polyethylene (HDPE), LLDPE and the polymethyl methacrylate that are formed by Merlon and copolyester.

19. the described optical bodies of claim 15 wherein, comprises terpolymer with at least one immiscible basically described additional materials of described first polymer and described second polymer.

20. the described optical bodies of claim 19, wherein, described terpolymer is selected from: SAN, polystyrene, medium density polyethylene, modified poly ethylene, the blend that is formed by Merlon and copolyester, ENB based copolymer, PB Polybutene-1,6-caprolactone polymer, Noblen, random copolymer of propylene, poly-(ethylene-octene) copolymer, the polymer that shows antistatic property, high density polyethylene (HDPE), LLDPE and poly-(methyl methacrylate).

21. the described optical bodies of claim 15 wherein, comprises inorganic material with at least one immiscible basically described additional materials of described first polymer and described second polymer.

22. one kind is the method that the cycloolefin rete is given mist degree to ENB, this method comprises:

It is the cycloolefin rete that at least one strippable coarse top layer is operably connected to described ENB, and wherein, described strippable coarse top layer comprises continuous phase and decentralized photo; And

To described ENB is that the cycloolefin layer is given texture, and this texture is corresponding with the texture on described strippable coarse top layer.

23. the described method of claim 22, this method also comprises: from described ENB is that the cycloolefin layer is peeled off described strippable coarse top layer, wherein, described ENB is that the surface of coming out of cycloolefin layer is characterised in that, its mist degree is about 5% to 95%.

24. the described method of claim 23, wherein, described ENB is that the mist degree of cycloolefin rete is about 10% to about 30%.

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