CH709370A1 - Roll material for one or a Submikrometerschicht on a flexible support and use thereof. - Google Patents

Abstract

The roll material is suitable for or already provided with a submicrometer layer (5) on a flexible support and comprises a support web (1) forming the support, which is rolled up on itself with an intermediate layer. The intermediate layer comprises an auxiliary carrier web (3) which is provided on its one side with a first adhesive layer (2) and on its other side with a second adhesive layer (4). The first adhesive layer (2) is non-permanently in contact with the back or a back coating of the carrier web (1). The second adhesive layer (4) is non-permanently in contact with the front side or a front-side coating or a sub-micron layer (5) already present on it and has a lower hardness than the carrier web (1) for cushioning one or the sub-micron layer. The roll material can be used in particular in roll-to-roll processes.

Description

Technical area

The invention relates to a roll material for or with a Submikrometerschicht on a flexible carrier with a carrier web forming the carrier, wherein the carrier web is rolled up with an intermediate layer on itself.

The sub-micron layer may in particular be one or more of the layers used in the construction of photoactive or light-sensitive electronic elements based on organic materials, including barrier layers for protecting the organic material from oxygen and moisture. Light-active electronic elements include light-emitting diodes such as OLEDs (Organic Light Emitting Diodes) and photovoltaic cells such as OPVs (Organic Photovoltaic Cells) for the light-sensitive electronic elements.

The invention also relates to uses of such a roll material.

State of the art

Light-active electronic elements on flexible carriers ("light emitting display panels") and processes for their preparation are known, for example, from US 2004 0 135 503 A1. As flexible carrier transparent plastic films are mentioned, inter alia, made of polyester, which are provided with a barrier layer to protect the organic materials from moisture and oxygen. The barrier layer consists for example of SiN and is extremely thin with a typical thickness of 5-50 nm.

The photoactive elements are constructed in several, also very thin layers with thicknesses in the nanometer range in the form of so-called stacks on the barrier layer and in addition to the light-active organic layers also comprise electrode layers and an outer encapsulation. The conditions are similar in the case of light-sensitive electronic elements.

Methods for producing the thin barrier layer are ALD (Atomic Layer Deposition), which is carried out under vacuum conditions or under inert gas at ambient pressure, target sputtering or PECVD (Plasma Enhanced Chemical Vapor Deposition).

In order to build up the stacks, the flexible supports on rigid glass plates with a smooth surface are temporarily fixed in US 2004 0 135 503 A1. By this fixation thickness variations of the layers to be applied should be avoided. As a means for releasable connection with the glass plates, inter alia, a sheet provided with adhesive layers on both sides is mentioned, wherein the two adhesive layers should have different levels of adhesion. The glass plate is bonded to the more adhesive layer and the flexible base to the weaker layer. After building up the stacks or at least individual layers thereof in a so-called "film forming step", the flexible carriers are detached from the glass plates and the glass plates are returned to the process for reuse. With regard to the thin barrier layer, it is mentioned that it can be applied in a roll-to-roll process.

In a publication by the Frauenhofer Research Institution For Organics, Materials and Electronic Devices COMEDD titled Roll-to-Roll Line For Organic LED And Solar Cells - (http://www.comedd.fraunhofer.de/de/comedd /_icr_content/contentPar/linklist/linklistPar/download/file.res/r2r-e.pdf) - also describes a roll-to-roll method for applying sub-micron layers of such cells to a carrier web in which the carrier web is transferred from a first web Roll is unrolled on which it is rolled up on itself together with an interleaf called liner or liner. The intermediate layer is removed prior to applying the Submikrometerschichten on the carrier web and rolled up separately. After application of the Submikrometerschichten the carrier web is probably rolled up to protect these layers with an unrolled from another roll and fed to it intermediate layer on a second roll on itself.

The publication also mentions processes under vacuum conditions and under protective gas atmospheres for applying the sub-micron layers.

Presentation of the invention

The invention has as its object to provide a roll material of the type mentioned, by which an improved protection of the existing Submikrometerschicht is obtained, which offers more favorable conditions for the application and the quality of an applied Submikrometerschicht in roll-to-roll process and which manages in such methods without removing an intermediate layer and supplying a further intermediate layer. This object is achieved by a roll material according to claim 1.

The inventive roll material is therefore characterized in that the intermediate layer comprises an auxiliary carrier web, which is provided on its one side with a first adhesive layer and on its other side with a second adhesive layer, wherein the first adhesive layer with the back or a back coating the carrier sheet is non-permanently in contact, wherein the second adhesive layer is non-permanently in contact with the front or a front side coating of the carrier web or with a submicron layer already thereon, and wherein the second adhesive layer is for upholstering one or the sub-micron layer has a lower hardness than the carrier layer.

With regard to the uses of the inventive roll material, the invention has the object of avoiding any contamination of the carrier web under at least one layer of its front or back coating, especially under a Submikrometerschicht. This is achieved by the features of claim 11.

According to the invention, this roll material is therefore used in a roll-to-roll process, wherein the roll material is unrolled from a first roll, wherein the carrier web of the unrolled roll material in the common pass with the auxiliary carrier web through at least one processing station with a front and / or back coating and / or a Submikrometerschicht and / or provided with transverse perforations and / or with laterally projecting tabs or indentations, and wherein the thus processed roll material is then rolled up again on a second roll.

In the inventive roller material on the carrier web optionally already existing Submikrometerschicht is covered by the second adhesive layer without gap and thus optimally protected against external influences. The inventive roll material can be stored and transported without further protective measures for its further processing.

Due to the softer, second adhesive layer Submikrometerschicht is also padded on the harder carrier web. As a result, for example, a speck of dust on the surface of the sub-micron layer, which would be capable of damaging the submicrometer layer under the pressure prevailing on the roll, can be resiliently received by the softer, second adhesive layer, thus avoiding damage to the sub-micron layer.

With regard to an inventive use of roll-to-roll on the support layer still applied Submikrometerschicht the roll material according to the invention offers the advantage that when unrolling and thereby taking place detachment of the second adhesive layer of the surface to be coated, this cleaned becomes. Any impurities, especially again dust grains, adhere to the second adhesive layer usually namely stronger than on the surface to be coated and are taken along with the detachment of the second adhesive layer of this and removed. As a result, the submicrometer layer still to be applied is not applied via the impurities, which in the case of dust grains can certainly have dimensions several times greater than the thickness of the submicrometer layer to be applied. By contrast, the fact that the same impurities then come into contact with the freshly applied submicrometer layer during rewinding is still less critical because they are then padded by the softer second adhesive layer as described.

In the inventive use, the carrier web and the auxiliary carrier web are themselves connected in transit through a processing station for applying, for example, a Submikrometerschicht together. Removal of a first auxiliary carrier web and the supply of a second auxiliary carrier web as an intermediate layer as in the prior art is eliminated. The continuous entrainment of the auxiliary carrier web is only possible by their bonding with the carrier web and would not be possible with only loosely superimposed webs because of unavoidable, leading to wrinkles on the second roller longitudinal displacements.

The roll material according to the invention can be used in a simple embodiment with only the carrier web, the auxiliary carrier web, the two adhesive layers and a barrier layer as Submikrometerschicht example, as starting material for a method according to US 2004 0 135 503 A1. By already containing the flexible carrier web forming the transparent carrier web and provided with the adhesive layers, flexible auxiliary carrier web already connected, eliminates an optionally difficult to perform, separate handling for connecting portions of the carrier and the auxiliary carrier web.

Preferred embodiments of the inventive roll material are given in the claims 2-10 and the inventive uses in claims 12-14.

Thereafter, the carrier web may be a plastic film, in particular a polyester film, or a film of PEN (Polyethlennaphthalat) or a polycarbonate film. Also suitable would be a nanopaper.

Especially for applications in OLEDs or OPVs, the carrier web is preferably transparent and / or light scattering. Here, nanopapers are of the kind as in Zhiqiang Fang et al. "Novel Nanostructured Paper with Ultra-High Transparency and Ultra-High Haze for Solar Cells", Nano Letters, Just Accepted Manuscript, Publication Date (Web): 27 Dec. 2013 is characterized by a particularly high transparency of approximately 96% with a simultaneous high haze of approximately 60%.

The thickness of the carrier web can be selected in the range 50-200 microns, preferably in the range 75-125 microns.

The auxiliary carrier web can: a plastic film, in particular a polyester film again, or a fleece or a woven fabric, in particular each of carbon fibers, or a metal foil, in particular of aluminum or strip steel, be, and / or have a thickness in the range 12 microns to 100 microns.

With regard to the further layers and the application, the materials used for the carrier web and the auxiliary carrier web should be loadable with a temperature of at least 90 ° C.

Compared to the carrier web or its at least one coating, the adhesive forces of both adhesive layers should each be less than compared to the auxiliary carrier web and adjusted so that a 50 mm wide strip of the carrier web with a peel force of 0.05 N-10 N, preferably of 0.1N -5 N and further preferably from 1-2 N, at an angle of 180 ° detach from them.

In principle, the adhesive forces of both adhesive layers with respect to the carrier web or its at least one coating can be substantially the same size.

Advantageously, the same adhesive can be used for both adhesive layers, which also makes it possible to use a nonwoven or woven fabric embedded in the adhesive as an auxiliary carrier web.

Even with the same adhesive forces, the roll material according to the invention can be used as a flexible support, for example in a process according to US 2004 0 135 503 A1, wherein the flexible support after the "film forming step", as has surprisingly been found, nevertheless of the detach second adhesive layer, without resulting in a detachment of the first adhesive layer of the glass plate. Thereafter, the remaining on the glass plate portion of the auxiliary carrier web can be deducted from this, wherein the surface of the glass plate for a subsequent reuse with advantage at the same time still cleaned. The same adhesive forces even facilitate the maximization of the fixation of the flexible support on the glass plate, since at different adhesive forces the weaker would determine the maximum possible bond strength. With the same adhesive forces one gains thereby leeway with regard to the adjustment of the adhesive forces.

The second adhesive layer, but preferably also the first adhesive layer, may further have at least one of the following properties: a hardness of at least 1.5 times, preferably at least 2.0 times, lower than the carrier web; a thickness of 5-20 μm; it is a PSA (Pressure Sensitive Adhesive) adhesive; it forms without the use of aqueous or organic solvents, chemically, in particular by UV or electron beam, fully cured solid state system; it is temperature resistant up to at least 90 ° C; is made of a hotmelt PSA coatable at temperatures below 50 ° C; it is an extruded plastic film made by blending with sticky tacky or blended resins; it is mixed with adsorbers such as activated carbon; It is mixed with water- and / or oil-binding absorbers.

The term "hardness" used above for the characterization of the carrier web and at least the second adhesive layer is to be understood in the sense of the following, so-called "Hardness Identification" test derived from ISO NF 2 815-2005: In this test, a hardened, disc-shaped steel knife with a diameter of 50 mm, whose outer edge as a cutting edge with a trapped by the two cutting edges cutting angle of 65 ° under load of 800g weight for 5 sec at a right angle to the surface of the material one whose hardness determined should. The length of the resulting in the surface Eindringspur is then used as a measure of hardness. The longer the indenting track, the softer the material or its surface.

In such a test resulted, for example, for a polyester film with 100 microns thickness, as would be suitable as a carrier layer in the context of the present invention, a length of Eindringpur of 1mm. In a softer adhesive layer of 10 μm thickness on a polyester film with 50 μm thickness, as would be suitable at least for the second adhesive layer and the auxiliary carrier web in the context of the present invention, the length of the Eindringspur contrast was 2.25 mm. Accordingly, in the context of the invention, the tested adhesive layer would have a 2.25 times lower hardness than the tested 100 μm polyester film.

A high softness or low hardness is favorable for the Abpolsterungseffekt described. A high softness or low hardness can be achieved inter alia by a relatively large thickness of the adhesive layer. As the thickness increases, adhesive layers regularly but also develop increasing adhesive forces, which according to the above information should be rather low in order to ensure the detachability described. The adhesive forces must also be lower than the cohesion within the adhesive layers, so that the detachment takes place without residue. Thick adhesive layers also show a certain flow behavior, which would also be rather disadvantageous here. At least up to an adhesive layer thickness of 20 microns, however, the properties relevant to the invention can be realized.

For the roll-to-roll use according to the invention, at least one of the two adhesive layers must be repositionable at least once. In the case of the mentioned low adhesive forces, non-permanently adhering adhesive layers of the type considered usually have this property. A further multiple repositionability of both adhesive layers is moreover preferred with regard to the application of several layers in several passes and in general to a reusability of the intermediate layer of auxiliary carrier web and the two adhesive layers.

The first and / or the second adhesive layer could also be layers which were produced simultaneously with the auxiliary carrier web in a coextrusion process.

For the first and / or the second adhesive layer also technologies could be used, as in Mengüç Y et al. "Staying sticky: contact self-cleaning of gecko-inspired adhesives", J. R. Soc. Interface 20131205 are described.

Suitable as an intermediate layer and thus taking over the function of the auxiliary carrier web and the two adhesive layers overall is optionally also a so-called Clingfolie.

As is further preferred, the roll material according to the invention is provided with additional layers compared to its simplest embodiment with only the carrier web, the auxiliary carrier web and the two adhesive layers.

In particular, a front-side coating of the carrier web comprises a planarization layer which at least partially compensates its roughness. Namely, the natural surface roughness of plastic films may be a multiple of the layer thickness of sub-micron layers, such as the barrier layer in particular. The planarization layer should therefore have a thickness in the range 10-50 microns. At least for large thickness, it can also be applied only part of the area. Corresponding planarization layers are described, for example, in US 2011 0 250 392 A1.

In addition to a barrier layer as Submikrometerschicht the carrier web on the front side at regular intervals on the barrier layer already partially applied electrode layers and / or light-active or light-sensitive polymer layers to fully formed stacks of OLEDs, OPVs or the like may include.

On the back side, the carrier web can be provided with a light-outcoupling layer and / or a layer which increases its mechanical resistance, such as its scratch-resistance. As an example of a suitable light-outcoupling layer, one may be mentioned from the Mate PixClear ™ from Pixelligent Technologies, Baltimore, Maryland, U.S.A.

Finally, the inventive roll material to facilitate its subdivision into individual sections or sheets may be provided at regular intervals with transverse perforations. To facilitate the subdivision or subsequent control of partial area layers on the individual sections or arches, laterally projecting tabs or notches may also be provided in the register with the transverse perforations.

The application of a backside coating can be done in the same manner as a front side coating on a roll material according to the invention in a roll-to-roll process by simply removing the material from the first roll by peeling the first adhesive layer from the back of the carrier web or one on this already existing coating is unrolled. Here too, the described cleaning effect results with respect to the surface to be coated.

In the case of several layers, these can be applied successively in a plurality of roll-to-roll passes, wherein in each case the target roll of the preceding pass can be used directly as the starting roll for the subsequent pass. If the device used allows the reversal of the direction of passage, the roles between two passes must not even be implemented.

Due to the structure of the inventive roll material, it is even possible to perform a front and back side processing of the carrier web in the same run of roll-to-roll. This can be achieved simply by the following additional steps: Delaminating the auxiliary carrier web from the carrier web by detaching one of the adhesive layers from a side of the carrier web at a delamination position, Guiding the auxiliary carrier web in a loop around one of the rollers, and Laminating the auxiliary carrier web to the carrier web while bonding the other adhesive layer to the other side of the carrier web at a laminating position upstream of the delaminating position in the direction of passage.

With regard to the submicrometer layer (s) sensitive to soiling, it is preferred to carry out the uses according to the invention at least under clean-room conditions or under protective gas. If individual layers according to the prior art have to be applied under vacuum conditions, it is preferable to carry out the entire process according to the invention, including unwinding and unwinding in a vacuum chamber.

If a roll material according to the invention is to be produced with transverse perforations and associated grip tabs, it is preferable to punch the transverse perforations and the grip tabs in the same pass from roll-to-roll with the same punching tool. In this way, a possibly advantageous tolerance for the subsequent further processing of the inventive roll material between the position of the transverse perforations and the grip tabs can be achieved.

Brief description of the drawings

Exemplary embodiments of the roll material according to the invention and the production method according to the invention are explained below with reference to the drawings. In all the schematic drawings show: <Tb> FIG. 1 <SEP> a roll of a roll material according to the invention; <Tb> FIG. 2 <SEP> upper, carrier web-side layers of a section of a rolling material according to the invention with a special design of the front-side coating; <Tb> FIG. 3 <SEP> upper, carrier web-side layers of a section of a rolling material according to the invention with special design of the back-side coating; <Tb> FIG. 4 <SEP> a portion of a roll material according to the invention glued on a glass plate <Tb> FIG. 5 <SEP> a section of a roll material according to the invention in a plan view with transverse perforations; <Tb> FIG. 6 <SEP> a method for applying a barrier layer in the production of a roll material according to the invention; <Tb> FIG. 7 <SEP> a method for applying a back coating of the carrier web of a roll material according to the invention; <Tb> FIG. 8 <SEP> a method for applying a front and a back coatings on the carrier web of a roll material according to the invention in the same run; and <Tb> FIG. 9 <SEP> a method of applying an electrode layer to a roll material according to the invention.

Ways to carry out the invention

Fig. 1 shows a roll material according to the invention according to a first embodiment. It is multi-layered with a transparent carrier sheet 1, a first adhesive layer 2, an auxiliary carrier sheet 3, and a second adhesive layer 4 in this order. On its front side facing away from the first adhesive layer 2, the carrier web 1 is already provided with a coating 5. The coating 5 is a Submikrometerschicht in the form of a barrier layer against the passage of moisture and oxygen or comprises such a barrier layer, in particular as the uppermost layer. The roll material is rolled up in itself flexibly and without an intermediate layer on itself. The second adhesive layer 4 is thereby in adhesive contact with the front-side coating 5. The second adhesive layer 4 is non-permanently adhering to the coating 5, however, so that it can be detached from it without residue and the roll material as shown in FIG Roll is unrollable. Likewise, the second adhesive layer 2 is non-permanently adhering to the back of the carrier web 1, so that, as will be explained later, the carrier web 1 can be detached from this adhesive layer 2 without residue. The adhesion of the two adhesive layers 2 and 4 with respect to the surfaces mentioned is relatively weak and, moreover, repositionable, so that it can optionally be repeatedly prepared after detachment. With regard to the materials of the various layers, their properties and thicknesses, reference may be made to the values and properties already given above.

As already stated, the tightness of the barrier layer is of crucial importance for the life of light-active or light-sensitive, electronic elements based on organic materials. Even the smallest defects in the barrier layer can lead to premature failure of the elements. The front-side coating 5 is therefore preferably constructed multilayered for this application, as shown in FIG. 2. Below a barrier layer 5.1, a transparent planarization layer 5.2 is present here. Through this layer, the surface roughness of the carrier web 1 is at least partially compensated and created a smoother pad for the barrier layer 5.1. A further improvement of the barrier effect is achieved by a second barrier layer 5.3 below the planarization layer 5.2, as shown in the right half of FIG. The second barrier layer 5.3 is coated directly on the rough surface of the carrier web, which is not so favorable for their tightness. Nevertheless, together with the first barrier layer 5.1, the second barrier layer 5.3 contributes to the overall tightness of the layer 5, since any defects in the barrier layers 5.1 and 5.3 are usually not in the same place in mutual overlap at least in the case of statistical distribution.

In the roll material of Fig. 2, the back of the carrier web 1 is uncoated, but here too a coating, which is hereinafter referred to collectively with 6, may be present. 3 shows two examples of advantageous backcoats, wherein the coating 6.1 shown in the right-hand half of FIG. 3 is a transparent material, by means of which the mechanical resistance, such as the scratch resistance, of the carrier web 1 is increased. The layer 6.2 shown in the left half of FIG. 3 is a transparent, light coupling-out layer, which reduces the light reflection at the interface formed by the rear side of the carrier web 1 by a suitably selected refractive index and / or effects a certain light scattering by its surface structure. The properties mentioned could also be achieved simultaneously by a suitable coating material if, for example, the material is both scratch-resistant and has the desired refractive index.

On the representation of a particular embodiment of the front of the carrier web 1 and the representation of roughness is omitted in Fig. 3. In fact, however, the embodiments explained with reference to FIG. 2 could also be present here.

Fig. 4 shows as an example of a possible use of roll material according to the invention with the layers 1-5 described above (including optionally again the layers 5.1, 5.2, 5.3, 6, 6.1 and / or 6.2) a section 10 of a such roll material glued on a glass plate G. On the barrier layer 5 is a light-active electronic element based on organic materials in the form of an OLED stack 11 with an anode layer 12, a light-active polymer layer 13, a cathode layer 14 and an encapsulation 15 constructed, where on the nature and training of the electronic element here does not matter. It could also be another or a light-sensitive element.

The sticking of the roll material 1-5 on the glass plate G is used for the purpose of its temporary fixation for register accurate application of the layers 12-15 of the OLED stack 11. Tolerances in order to area must be complied with here in the rule. The means required for this sticking is already integrated in the roll material according to the invention by the auxiliary carrier web 3 and the two adhesive layers 2 and 4.

After the application of the layers 12-15 of the portion of the carrier web 1 is detached as a flexible support of these layers of the first adhesive layer 2, as illustrated in Fig. 4 by the arrow P1. The detachment is carried out so that the composite of the auxiliary carrier web 3 with the two adhesive layers 2 and 4 remains on the glass plate G. Only in a second step is this composite also detached from the glass plate G, as is illustrated in FIG. 4 by the arrow P2. Thereafter, the glass plate G is available for further appropriate use. This sequential detachment is also possible if the same adhesive is used for the two adhesive layers 2 and 4 and the adhesive force of the adhesive layer 2 with respect to the rear side of the carrier 1 is approximately the same as the adhesive force of the adhesive layer 4 with respect to the glass plate G.

In the case of a false coating, the section 10 can also be completely removed with all layers of the glass plate G, after which this is also immediately available for reuse.

5 shows a longitudinal section of a roll material according to the invention, which is divided by transverse perforations 16 into a plurality of sections designated n-1, n and n + 1. By means of the transverse perforations 16, the individual sections can be easily separated from one another, for example for use according to FIG. 4.

Each of the sections of Fig. 5 is, as also shown, preferably additionally provided with laterally projecting tabs (17), which can be produced by punching technically at a straightening of the side edges of the roll material. The tabs 17 can be used as grip tabs in the process of FIG. 4 for detaching the portion of the carrier web 1 from the composite of the auxiliary carrier web 3 with the two adhesive layers 2 and 4. For this application, it is advantageous if this composite does not extend into the tabs 17. Tabs 17 could also be used as markers for sequentially indexing multiple local layers such as layers 12-15 of OLED stack 11 of FIG. 4 in register with the individual sections. A high degree of precision can be achieved if, on the roll material of FIG. 5, the transverse perforations 16 and the grip tabs 17 have been punched in the same pass from roll-to-roll with the same punching tool.

With reference to FIGS. 6-9, further uses of roll material according to the invention will now be explained. This is a so-called roll-to-roll process, in which an endless web is unwound from a first roll R1, rolled up again on a second roll R2 and processed therebetween. On both rollers R1 and R2, the continuous web is rolled up on itself without an intermediate layer (interleave).

In the method of Fig. 6 is located on the first roll 1, a roll material according to the invention with the previously described layers 1-4, that is with a carrier web 1, a first adhesive layer 2, an auxiliary carrier web 3 and a second adhesive layer 4 in this Sequence. By rolling this material on itself without interleaving in several turns, at least one turn of the second adhesive layer 4 is in contact with the front side of the carrier web 1 of an adjacent turn. In passing through a processing station S1, a submicrometer layer in the form of a barrier layer 5 or such a layer is applied to the front side of the carrier web 1 in FIG.

If impurities such as in particular dust grains are on the front side of the carrier web 1 to be coated, they are taken along by the adhesive of the second adhesive layer 4 during unwinding of the roll 1 and thus removed from the carrier web 1. The front side of the carrier web 1 is cleaned in this way immediately before its coating. In Fig. 6, the second adhesive layer 4 is shown loaded with individual dust grains, one of which is denoted by 18.

By the endless web in the process of Fig. 6 without interposition in several turns on the roll R2 is rolled back on itself, the dust grains come there 18 with the freshly applied, front coating 5, although in contact, but now on the top , They are embedded in and / or supported by the substantially softer in relation to the carrier web 1 and the coating 5, and in relation to the coating 5 also substantially thicker adhesive of the second adhesive layer 4 and thereby can be formed by the coating 5 or in her contained barrier layer do no damage.

In contact with the second adhesive layer 4, the coating 5 on the second roller R2 is also well protected against environmental influences such as in particular against exposure to further dust and thus stored, for example, for further processing according to FIG. 4 without additional, at least complex protective measures and transported.

Contamination of the surface to be coated between unrolling from the roll 1 and rolling up on the roll R2 can be ensured, for example, by clean room conditions. If the mentioned ALD method is used under vacuum for application of the coating 5, it is preferable to carry out the entire process of FIG. 6, including rolling from the roll R1 and rolling on the roll R2 in the same vacuum vessel, whereby contamination between the rolls Rollers can also be avoided.

The method of FIG. 6 can be carried out several times in succession, for example for applying the layers 5.1-5.2 according to FIG. 2, except for the application of only one barrier layer 5. This results in each time with advantage the cleaning effect when rolling off the roller R1 and the protective effect when rolling on the roller R2. It could be provided for the order of several front-side layers in the same pass also several processing station in series one behind the other between the two rollers R1 and R2, this Fig. Shows. Also, multiple layers could be sequentially applied by reversing the direction of travel between the rollers R1 and R2 without staggering the rollers R1 and R2.

In Fig. 7 is located on the roller R1, an inventive roll material with layers 1-5 corresponding to the material on the roller R2 of Fig. 6. However, this material is now handled so that the back of the carrier web 1 is detached from the adhesive layer 2 and exposed. Only the outer turn with the layers 2, 3 and 4 falls in this type of settlement as waste. In the passage through at least one processing station S2, the back of the carrier web can then be coated, for example, with one of the layers 6.1 or 6.2 of FIG.

The method of Fig. 8 allows the application of a front and a back coating on the carrier web 1 of a roll material corresponding to that on the roll R1 of Fig. 6 in a single pass. For this purpose, as in FIG. 6, the material is unrolled from the roller R1, exposing the front side of the carrier web 1, and thereafter provided, for example, with a barrier layer 5 in the front, as it passes through a processing station S1. At a downstream Delaminierposition D, the subcarrier 3 is separated together with the two adhesive layers 2 and 4 with detachment of the first adhesive layer 2 from the back of the carrier web 1 and guided around the roller R1 in a loop. He is then connected to the already on the front side of the carrier web 1 barrier layer 5 with the second adhesive layer 4 at a lamination position L upstream in the direction of passage of Delaminierposition D. The back of the carrier web 1 exposed after the delamination position D is then provided in a processing station S2 with a coating on the back, for example corresponding to the coating 6.1 or 6.2 of FIG. Finally, the roll material coated on both sides is rolled up again on a roll R2.

FIG. 9 also shows how at least one further layer such as, in particular, an electrode layer corresponding to the electrode layer 12 of FIG. 4 could be applied in part to a barrier layer 5 by a processing station S3 on a barrier layer 5 of a roller material according to the invention , By repeated passage or in the presence of other processing stations in series, even further, not shown in Fig. 8 layers could be applied up to the complete stack of a photoactive or light-sensitive electronic element based on organic materials. The invention is insofar not limited to roll material for light-active or light-sensitive, electronic elements based on organic materials but may also include such elements.

In order to apply the individual layers of these elements in such a process without fixing on a glass plate according to FIG. 4 with the required low tolerances relative to each other, it may be beneficial to use a dimensionally stable material for the subcarrier 3 as a plastic film , Suitable for this purpose would be, for example, a metal foil, in particular made of aluminum or strip steel.

LIST OF REFERENCE SIGNS

[0069] <Tb> 1 <September> carrier web <tb> 2 <SEP> first adhesive layer <Tb> 3 <September> auxiliary carrier web <tb> 4 <SEP> second adhesive layer <tb> 5 <SEP> front coating / barrier layer <Tb> 5.1 <September> barrier layer <Tb> 5.2 <September> planarization layer <tb> 5.3 <SEP> second barrier layer <tb> 6 <SEP> back coating <tb> 6.1 <SEP> Scratch-resistant coating <tb> 6.2 <SEP> Light decoupling layer <Tb> G <September> glass plate <Tb> 10 <September> Roll Media section <Tb> 11 <September> OLED stack <Tb> 12 <September> anode layer <tb> 13 <SEP> light-active polymer layer <Tb> 14 <September> cathode layer <Tb> 15 <September> encapsulation <Tb> 16 <September> transverse perforations <Tb> 17 <September> tabs <Tb> 18 <September> motes <tb> R1 <SEP> first role <tb> R2 <SEP> second role <tb> S1, S2, S3 <SEP> Processing stations <Tb> D <September> Delaminierposition <Tb> L <September> laminating position <Tb> P1 <September> Arrow <Tb> P2 <September> Arrow

Claims (14)

A roll material for or with a sub-micron layer (5) on a flexible carrier with a carrier web (1) forming the carrier, wherein the carrier web (1) is rolled up on itself with an intermediate layer, characterized, the intermediate layer comprises an auxiliary carrier web (3) which is provided on its one side with a first adhesive layer (2) and on its other side with a second adhesive layer (4), wherein the first adhesive layer (2) is non-permanently in contact with the backside or a backside coating (6; 6.1; 6.2) of the carrier web (1), wherein the second adhesive layer (4) is in non-permanent contact with the front side or a front side coating (5.2) of the carrier web (1) or a sub-micron layer (5; 5.1, 5.3; 12; 13; 14; 15) already thereon is and wherein the second adhesive layer (4) for cushioning one or the Submikrometerschicht has a lower hardness than the carrier web (1). 2. Roll material according to claim 1, characterized in that the carrier web (1) a plastic film, in particular a polyester film, a polyethylene naphthalate film or a polycarbonate film or a nanopaper, and / or transparent, and / or is light scattering, and / or a hardness greater than the second adhesive layer (4) by a factor of at least 1.5 times, preferably of at least 2.0 times, and / or a thickness of 50-200 μm, preferably 75-125 μm. 3. Roll material according to claim 1 or 2, characterized in that the auxiliary carrier web (3) a plastic film, in particular a polyester film or a fleece or a woven fabric, in particular each of carbon fibers, or a metal foil, in particular of aluminum or strip steel, and / or has a thickness of 12-100 microns. 4. Roll material according to one of claims 1 to 3, characterized in that the adhesive forces of both adhesive layers (2, 4) relative to the carrier web (1), a present on its front Submikrometerschicht (5; 5.1) or a present on its back coating ( 6, 6.1, 6.2) are each less than in relation to the auxiliary carrier web (3) and are set so that a 50 mm wide strip of the carrier web (1) with a peel force of 0.05 N-10 N, preferably 0.1 N-5 N and further preferably 1-2 N, at an angle of 180 ° detach from them. 5. Roll material according to one of claims 1 to 4, characterized in that the second adhesive layer (4) and preferably also the first adhesive layer (2) has at least one of the following properties: a hardness lower than the carrier web (1) by a factor of at least 1.5 times, preferably at least 2.0 times, lower; a thickness of 5-20 μm; it forms without the use of aqueous or organic solvents, chemically, in particular by UV or electron beam, fully cured solid state system; it is temperature resistant up to at least 90 °; is made of a hotmelt PSA coatable at temperatures below 50 ° C; it is an extruded plastic film made by blending with sticky tacky or blended resins; it is equipped with adsorbents such as activated carbon; It is provided with water- and / or oil-binding absorbers. 6. Roll material according to one of claims 1 to 5, characterized in that the front side of the carrier web (1) is provided with a roughness at least partially compensating planarization layer (5.2). 7. Roll material according to one of claims 1 to 6, characterized in that the carrier web (1) has on its front side at least one sub-micron layer (5; 5.1) with at least one of the following properties: it is a barrier layer (5; 5.1; 5.3) for protecting light-active or light-sensitive organic materials from moisture and oxygen; it is a light-active or light-sensitive layer (13) based on organic materials of a light-active or light-sensitive electronic element (11); it is an electrode layer (12, 14) of a light-active or light-sensitive electronic element (11), it has a thickness of 5-120 nm. 8. Roll material according to claim 7, characterized in that at least one Submikrometerschicht (12; 13; 14) at partial intervals on the carrier web (1) is applied at regular intervals. 9. Roll material according to one of claims 1 to 8, characterized in that the carrier web has a back-side coating (6), which is a light-coupling layer (6.2) and / or a mechanical resistance as the scratch resistance of the carrier web (1) increasing layer (6.1). 10. Roll material according to one of claims 1 to 9, characterized in that it is provided at regular intervals with transverse perforations (16) to facilitate its subdivision into sheets (n-1, n, n + 1) and / or that it in regular Spacing laterally protruding tabs (17) or notches, which are preferably arranged in register with the transverse perforations (16). 11. Use of a roll material according to one of claims 1 to 10 in a roll-to-roll process, wherein the roll material is unrolled from a first roll (R1), wherein the carrier web (1) of the unrolled roll material in common passage with the auxiliary carrier web (3) by at least one processing station (S1; S2; S3; ... Sn) with a front and / or back coating (6; 6.1, 6.2; 5.2) and / or a submicrometer layer (5.1; 5.2; 12; 13; 14; 15) and / or with transverse perforations (16) and / or with laterally protruding tabs (17) or notches, and; wherein the thus processed roll material is then rolled up again on a second roll (R2). 12. Use according to claim 11, characterized in that for the front and back processing of the carrier web (1) in the same pass from the role of the first roll (R1) to the second roll (R2) the following steps are carried out: Delaminating the auxiliary carrier web (3) from the carrier web (1) by peeling off one of the adhesive layers (2; 4)) from one side of the carrier web (1) at a delamination position (D), Guiding the auxiliary carrier web (3) in a loop around one of the rollers (R1, R2), and Laminating the auxiliary carrier web (3) with the carrier web (1) while bonding the other adhesive layer (4; 2) to the other side of the carrier web (1) at a laminating position (L) upstream of the delamination position (D) in the direction of passage. 13. Use according to one of claims 11 or 12, characterized in that the unwinding, the processing and the reeling of the roll material under clean room and / or under vacuum conditions is performed. 14. Use according to one of claims 1 to 13, characterized in that transverse perforations (16) and tabs (17) or indentations in the same pass from the first roller (R1) to the second roller (R2) are punched with the same punching tool.