AU2020200858B2

AU2020200858B2 - Manufacture of a plastic security substrate having embedded security element and plastic security substrate

Info

Publication number: AU2020200858B2
Application number: AU2020200858A
Authority: AU
Inventors: Matthias Pfeiffer; Peter Schiffmann
Original assignee: Giesecke and Devrient Currency Technology GmbH
Current assignee: Giesecke and Devrient Currency Technology GmbH
Priority date: 2019-02-08
Filing date: 2020-02-06
Publication date: 2021-08-19
Anticipated expiration: 2040-02-06
Also published as: AU2020200858A1; DE102019000918B3; GB202001576D0; GB2585115A; GB2585115B

Abstract

The invention relates to a manufacturing method for a plastic security substrate (2) having embedded security element (4, 6), wherein thermoplastic plastic material is blown up with a blown film extruder (16) to form a foil tube (24), at least one security element strip (10, 12) is guided through into the blown-up foil tube (24) and the foil tube (24) having the interior security element strip (10, 12) is guided through squeeze rolls (28) and connected into a web (8) for the plastic security substrate (2). Fig. 4 4/4 FIG. 7 24 38 40 10

Description

4/4

FIG. 7

24

38

Manufacture of a plastic security substrate having embedded security element and plastic security substrate

[0001] The invention relates to the manufacture of a plastic security substrate with embedded security element and a plastic security substrate.

[0002] Value documents, such as for example bank notes, manufactured from a security substrate are sometimes manufactured from plastic material to improve their circulation resistance, especially in tropical countries. In order to be able to use security elements that have proven to be very useful for paper-based bank notes, such as watermarks or a security thread, a security element must be embedded into the plastic security substrate. Corresponding manufacturing methods for this are known from EP 1258334 A2, WO 99/46133, WO 2016/142070 Al or WO 2004/028825 A2. There, it is provided to use two foil webs between which a web having the security element, for example a paper web, is placed. The layer structure obtained in this way is then connected into a plastic security substrate having embedded security element.

[0003] In WO 2016/142070 Al a paper-strip continuous web is embedded between two foil webs produced by extrusion. From the obtained composite web, by cutting to size there are produced as a security element individual substrates with respectively one embedded paper strip which comprises a watermark.

[0004] Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admission that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present disclosure as it existed before the priority date of each of the appended claims.

[0004A] Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps. Summary of the Disclosure

[0005] Disclosed herein is a manufacturing method for a plastic security substrate having embedded security element for a value document, wherein thermoplastic plastic material is blown up with a blown film extruder to form a foil tube, at least one security element strip is guided into the blown-up foil tube, and the foil tube with the interior security element strip is guided through squeeze rolls and connected into a web for the plastic security substrate.

[0006] For the manufacturing method there is used blown film extrusion. A thermoplastic plastic material is blown up to form a foil tube. Through this foil tube, a security element strip is guided. The foil tube runs with the then interior security element strip through squeeze rolls and is connected into a web for the plastic security substrate which then has the interior security element strip.

[0007] The security element inside the plastic security substrate is thus protected from environmental influences and yet cannot be reproduced by forgery attempts simply by printing technology.

[0008] The use of the blown film extruder advantageously combines the manufacture of the foils with the integration and connection with the interior security element. In most conventional processes using foil and paper webs, however, the plastic foil had to be manufactured first, then a web having the security elements had to be supplied and merged with the plastic foils to form a multilayer composite which then had to be mechanically connected. This three-step process is now resolved by the provided manufacturing method, since the manufacture of the foils, namely blowing up to form the foil tube and connecting the interior security element to form a web, is all effected in one manufacturing process.

[0009] The manufacturing method is not limited to only one single security element strip being guided through the foil tube. Rather, in preferred embodiments it is provided to incorporate several, e.g. different security element strips or security element strips of the same kind.

[0010] In particular, in order to produce a web from plastic having several adjacent plastic security substrates or single copies transverse to the web direction, it is preferred to incorporate several security element strips into the foil tube. Preferably, the web comprises a width for m adjacent plastic security substrates, with m between 2 and 20. The web comprises in its length a regular number, in any case more than 50, preferably more than 200, plastic security substrates.

[0011] There can be embedded exactly one security element in a plastic security substrate. However, it is also possible that two or more - preferably different - security elements are embedded in a plastic security substrate. Accordingly, several, for example n, in particular n=2 or 3, security element strips within the width of the plastic security substrate are fed to the squeeze rolls. Thus, m*n security element strips can be incorporated at the same time.

[0012] For forgery resistance, security elements are preferred which have very small dimensions, for example are designed in the form of thin security strips. In order to prevent these security elements from being damaged by incoming blown air and to achieve an exact positioning of the security element strips in the web of foil laminate, it is preferred that each security element strip is guided in an individual guide element, for example a guide pipe and/or guide rollers. The individual guide element guides the security element strip preferably up to the squeeze rolls. Alternatively or additionally, the individual guide element can also guide the security element strip already individually through the blow head of the blown film extruder and into the foil tube. The individual guide element or the individual guide elements is (are) positioned, positionable or controllable in its (their) position at the squeeze rolls such that the security element is at its target position in the plastic security substrate. The blown film extruder may comprise a position control (or position regulation) for the security element strip or security element strips. For the position regulation, a sensor is used to determine the actual position of the security element strip. An optical sensor (UV; VIS; IR), a magnetic sensor and/or a capacitive sensor can be used as a sensor. Based on the determined actual position - preferably the individual guide element at the squeeze roll and thus - the position of the security element strip is adjusted transversely to the web. As a position, a position in X and/or Y direction (transverse and/or longitudinal to the web) can be detected and controlled or regulated. A position of the security element strip is (also) controlled or regulated in the longitudinal direction of the web. A control or regulation of the longitudinal position is particularly advantageous when several security element strips are incorporated into the web or into a plastic security substrate. The longitudinal position is influenced with the aid of the tensile stress during unwinding the security element strip. The tensile stress (generated, for example, by individual guide rolls or the squeeze rolls) is increased or reduced until the target position is reached again. A position tolerance of for example +/- 1 mm, preferably +/- 0.5 mm, is specified.

[0013] During blowing up the foil tube there arises heat in the blown film extrusion method. For heat-sensitive security element strips it is therefore preferred to pre-cool them before they are incorporated into the blown-up foil tube.

[0014] In particular in the case of sensitive security element strips or security element strips which are small in width, and in order to enhance the location of the security element strip in the plastic security substrate resulting in the region of the squeeze rolls by connecting the foil tube with the interior security element strip it is preferred to guide the security element strip in a guiding device up to the squeeze rolls. The guiding device may in particular be configured as a pipe or comprise a pipe. The guiding device may furthermore comprise guide rollers. Further, the guiding device may have a thermal insulation, in particular to protect the security element strip from the increased temperature in the region of the blow head. In a particularly advantageous embodiment, the guiding device comprises a double-walled pipe which is actively cooled with a cooling medium, for example a gaseous (e.g. air) or liquid cooling medium.

[0015] The location transverse to the squeeze rolls and/or the orientation of the security element strip in the plastic security substrate can be important. Depending on the configuration of the guide element, the security element strip may be able to rotate in the guide element, for example. This is the case in particular when the guide element is a pipe. In order to be able to set the orientation of the security element strip in the plastic security substrate and its location in the substrate, it is preferred that the guiding device has an exit end which is located before the squeeze rolls and can be rotated by motor by at least 1800 and/or is transversely adjustable. In this way it can be ensured that the security element strip is introduced in the desired lateral position between the foil parts of the plastic foil tube at the squeeze rolls. One example of an exit end is a roll guide.

[0016] If several security element strips are used, it is preferred to guide them through the blow head in a common guide and to lead them in individual guide elements (e.g. pipes) within the blown-up foil tube to the squeeze rolls. Since the blow head normally has a ring nozzle, in which the available space for the feed-through of the security element strips is naturally limited, due to the common guide the available space can be better utilized. Optionally, the common guide may contain individual guides, for example as individual guide sleeves in a common collective sleeve. An advantage of the common guide is also that critical air turbulences in the region of the blow head can be reduced or avoided. In another advantageous embodiment, the collective sleeve is double-walled and has a tempered cooling medium, especially gases (e.g. air), which preferably exits through exit nozzles.

[0017] In preparation for the blow extrusion, it is preferred to guide the security element strip through the blown film extruder without producing a foil tube thereby. Here, blown air can be used in the blown film extruder so as to incorporate the security element strips between the squeeze rolls before the foil tube is produced.

[0018] The security element strip comprises a plurality of security elements arranged one behind the other. The security elements preferably correspond to the full height (or width) of the plastic security substrate. The security element in the plastic security substrate is then also referred to as a security thread or security strip. The web for the plastic security substrate comprises the interior security element strip and is divided at least in its length (and optionally in its width) into the plastic security substrates having respectively one interior security element. From the web there are thus created the single copies, usually bank notes.

[0019] In the present case, the web has a width for several plastic security substrates. Therefore, the extension of the plastic security substrate in this direction is now also referred to as the width. The width of the plastic security substrate can thus be greater (or smaller) than its length. The width of the security element strip, which extends over the entire length of the plastic security substrate, in particular configurations may be between 15% and 95% of the width of the plastic security substrate, in particular, in particular between 25% and 90%. However, conventional widths are preferred, i.e. a width of the security element strip which is between 1% and 20%, in particular between 2% and 14%, of the width of the plastic security substrate.

[0020] The security element strip may further comprise a start region without security elements. The start region is provided so as to be able to guide the security element strip into the blown film extruder (and up to the squeeze rolls) in preparation, especially without loss of security elements. The length of the start region corresponds at least to the distance between the blow head and squeeze rolls, in particular between 100% and 2500% of the distance.

[0021] Advantageously, security element strips can be connected one behind the other with a mechanical connection. For this purpose, the security element strip may comprise an end region without security elements. The end region can be smaller than the distance between the blow head and squeeze rolls, preferably have a length of 3 to cm. In particular, security element strips can be combined with different security elements. In this way, the initial spoilage in the foil production can be kept as low as possible and the so-called changeover time can be optimized. When the security elements are changed during the manufacture of the web, the position of the security element strips in the web is regularly adapted, for example by repositioning the guide at the squeeze rolls.

[0022] It is particularly preferred that several security element strips for different value documents are incorporated simultaneously during the manufacturing process. In this way, too, material loss can be reduced. If, for example, bank notes with a nominal value of 100 on the one hand and bank notes with a nominal value of 50 on the other hand are produced in parallel in one web (of accordingly twice the length), only one single starting step involving losses is necessary. The loss is almost halved.

[0023] In another variant, a web with various security element strips for various nominal values is produced and the web is printed differently in one common printing step - in particular locally depending on the security element strip. The printing step therefore takes place before the web is divided into single copies or plastic security substrates. Thus, in the printing step, with the aid of a collective form (printing form consists of at least 2 different printing designs), at least 2 different printing designs can be manufactured simultaneously, in particular for bank notes, for example with different nominal values or the same nominal values but different bank note types (e.g. commemorative note + standard note).

[0024] Preferably, the at least one security element strip is a paper strip or a combined paper/plastic strip. This is understood to be a combination of paper and plastic strip which, in the thickness direction of the strip, is a laminate of at least one foil ply and at least one paper ply and/or in the length or width of the strip comprises sections of only paper or only foil.

[0025] A security element strip may comprise - in the way known in the art - two, in particular spaced-apart, optically visible regions in its width. To a viewer, the security element in the plastic security substrate appears to be two or more spatially separated different security elements. The optically visible regions are arranged in different manners and in parallel. In the plastic security substrate, the one security element with the two regions then appears like two independent security elements, which are positioned exactly to each other and/or in parallel.

[0026] Any blown film extruder material can be selected as plastic material. PP (polypropylene), PE (polyethylene), PET (polyethylene terephthalate) or PA (polyamide) are only preferred material examples. The plastic material may be completely transparent, but alternatively it can be provided with coloring substances (pigments) or opacifying substances, e.g. TiO2. The plastic security substrate can be provided with an (external) antistatic layer either subsequently or in the blown film extruder.

[0027] Likewise, a blown film extruder is provided which has a blow head for blowing up thermoplastic plastic material into a foil tube and squeeze rolls. For introducing the at least one security element strip into the blown-up foil tube, a guiding device is provided which runs through the blow head and preferably up to the squeeze rolls. Thus, the foil tube having the interior security element runs through the squeeze rolls and the blown film extruder connects the foil tube with the interior security element strip into a web for the plastic security substrate. The structural features of the blown film extruder described above with regard to the manufacturing method are, of course, equally possible for embodiments.

[0028] The invention also relates to a value document as a plastic security substrate having a security element of the aforementioned type. In one configuration, the value document is configured as a bank note or check, for example.

[0029] In the following, the invention is explained in more detail with embodiment examples with reference to the attached drawings which also disclose features essential of the invention. These embodiment examples are for illustrative purposes only and should not be construed as limiting. For example, a description of an embodiment example with a large number of elements or components is not to be interpreted as a requirement that all these elements or components are necessary for implementation. Rather, other embodiment examples may also contain alternative elements and components, fewer elements or components, or additional elements or components. Elements or components of different embodiment examples can be combined with each other unless otherwise specified. Modifications and variations which are described for one of the embodiment examples may also be applicable to other embodiment examples. In order to avoid repetitions, identical elements or elements corresponding to each other are designated with the same reference signs in different figures and are not explained several times. In the Figures there are shown:

Fig. 1 a schematic representation of a security substrate with two security features,

Fig. 2 a plastic web for manufacturing the security substrate of Fig. 1,

Fig. 3 a sectional view through the security substrate of Fig. 1,

Fig. 4 a blown film extruder for manufacturing the plastic web of Fig. 2,

Figs. 5 and 6 detailed views of the blow head of the blown film extruder of Fig. 4 in different embodiments and

Fig. 7 a schematic diagram of an exit end of a guide provided in the blown film extruder of Fig. 4.

[0030] Fig. 1 shows a schematic top view of a security substrate 2, which serves, for example, to manufacture a value document, the security substrate then being individualized, for example by printing bank note information and serial numbers. The security substrate 2 consists of a plastic material, as will be explained below, and has two security elements 4 and 6 embedded in the plastic material. For example, this is a security thread 4 and a paper strip 6 having a watermark.

[0031] The security substrate 2 was cut from a web 8 containing a large number of single copies for security substrates 2, as symbolized by dashed lines in Fig. 2. Security element strips 10 and 12 are worked into web 8 and supply the security features 4 and 6 for the copies. The security element strips 10, 12 extend longitudinally to the web 8 at corresponding transverse positions, matching the later singling, i.e. matching the copies provided on the web 8 for the security element 2.

[0032] Fig. 3 shows a sectional representation of the security substrate 2 which is formed on its outer surfaces by a first foil ply 13 and a second foil ply 14. They are composed of the same material and, as will be explained later, they come from the same manufacturing process. The security elements 4, 6 are embedded between the foil plies 13, 14. Of course, also only one of the security elements 4, 6 can be present.

[0033] The manufacture of web 8 is effected in a blown film extruder 16, which is shown schematically in Fig. 4. In the blown film extruder 16, an extruder 17 supplies plasticized thermoplastic plastic material 18, which via a blow head 20 by blowing in blown air 22 is extruded to form a foil tube 24. This is merged in the vertically upward moving direction, which is also generated by the blown air 22, in a tube merging 26 and pressed together via squeeze rolls 28 to form a plastic web and is wound onto a winder 32. For incorporating the security elements, a guiding device guides the security element strips 10, 12 in the form of a bundle 36 through a ring nozzle of the blow head 20 and into the interior of the foil tube 24. In Fig. 4, for the sake of simplicity, only one single solid line is shown. In fact, as Fig. 5 illustrates, normally a bundle 36 of security element strips is fed by the guiding device 34 into individual guide elements, for example pipelines 38, so that when the foil tube 24 is merged and connected at the squeeze rolls 28, a large number of security element strips 10, 12 are incorporated between the compressed walls of the foil tube 24. In this way, the web 8 arises in the blown film extruder 16.

[0034] As described below, the outer shape of the security substrate and/or the embedding location of the interior security element may differ from the variant represented in Figure 3. In the shown variant, the security element leads to a deformation of the security substrate, whereby one or both foil plies may be affected. Figure 3 shows a one-sided deformation of only the foil ply 13. The foil ply 14 is plane on the upper side (outer shape) and flat on the lower side (embedding location).

[0035] This variant may arise, for example, when the squeeze rolls have different elasticity. The squeeze roll facing the foil ply 13 has a higher elasticity than the squeeze roll facing the foil ply 14, so that substantially only the foil ply 13 is deformed. If, however, both squeeze rolls have a same elasticity (or hardness), the foils 14 and 13 are deformed substantially to the same extent. The security element (or the security elements 4, 6) may penetrate into both foil plies 13, 14. The two outer surfaces (upper side of the foil ply 14 and lower side of the foil ply 13) of the security substrate 2 can be plane in the region of the security element, be uniformly deformed or be asymmetrically deformed.

[0036] In general, the outer shape of the security substrate and/or the embedding layer are influenced by the plastic material used and/or the squeeze rolls. Relevant properties of the squeeze rolls are surface, material, here in particular elasticity, squeezing pressure and/or temperature control of the squeeze rolls. The plastic material and the squeeze rolls are selected such that a specified (one of the aforementioned) outer shape of the security substrate and/or embedding location is achieve.

[0037] If, for example, both squeeze rolls have a same elasticity or hardness, the foil plies13 and 14 are deformed substantially to the same extent.

[0038] If the squeezing process is effected in the melting region or near the melting or softening region (TG) of the plastic material, the foil ply 13, 14 is tapered in the region of the security strip elements 4, 6 by partial material displacement of the plastic material. This may lead to a reduction of the thickness differences or preferably to an equalization of the thickness differences (no deformation of the outer shape).

[0039] The foil tube 24 or each of the foil plies 13, 14 may comprise two (or more) foil partial plies of different plastic material. Corresponding blown film extruders are known. An inner partial ply is now referred to as a core partial ply, an external partial ply is referred to as an outer partial ply.

[0040] Advantageously, the squeezing process is effected with temperature controlled rolls. The temperature is set so high that the plastic material does not soften again. In case of several partial plies, the temperature can be set so high that only a core partial ply softens. The plastic material of the core partial ply has a lower melting temperature region than the plastic material of the outer partial ply. With the aid of the blown film extruder a foil tube with core partial ply and an outer partial ply is produced, whereby the thickness of the core partial ply is greater than the thickness of the outer partial ply, preferably by a factor a (d-core = a* d-outer), with a greater than 2, preferably with 2 < a < 50.

[0041] The security element strips 10, 12 are optionally also conveyed with blown air 22, which e.g. flows upwards through the pipelines 38. The security element strips , 12 can be conveyed with the aid of blown air, in particular during initial introduction - for example, up to an exit end of a guide pipe. After the foil bubble has been generated in the blown film extruder, however, the conveyance of the security element strips is effected substantially by tensile forces, in particular from the region of the squeeze rolls.

[0042] Fig. 6 shows an alternative which consists of the guiding device 34 guiding the bundle 36 in a common guide through the blow head 20 and only then dividing it into the individual guide elements 38 (e.g. pipelines). Furthermore, in this embodiment, a pre-cooling of the security strips 10, 12 is provided in the common section of the guiding device 34 by a corresponding cooling device being present. In this way, the security element strips 10, 12 are protected from heat damage when guided through the blown-up and normally heated foil tube 24. This is of course also possible in the construction of Fig. 5.

[0043] In order to ensure that the individual security element strips 10, 12 are introduced in the correct orientation and at the correct position between the squeeze rolls 28, according to Fig. 7 a corresponding exit end is configured at the squeeze-roll side end of the pipeline 38, which can be adjusted transversely to the longitudinal direction of the roll and with which also the orientation of the security element strip , which may possibly rotate in the pipeline 38, can be set. In the embodiment of Fig. 7, this exit end is configured in the form of a rotatable roll pair 40 adjustable by motor.

[0044] Furthermore, it is preferably provided that the end of the guiding device is located directly before the squeeze rolls 28, so that in the output region of the guiding device the transport of the security element strips 10, 12 from the exit end, for example the roll pair 40, is directly introduced into the gap of the squeeze rolls 28.

[0045] The security element strips 10, 12 are advantageously incorporated into the web in an oscillating manner, i.e. with a position which varies around a target position. Thus, storage problems can be avoided, for example when winding up the web, winding up a roller produced from the web or stacking sheets produced from the web. The amplitude of the position variation is preferably between 0.5 - 5 mm. The incorporation in an oscillating manner can be achieved with a uniform or non-uniform (e.g. rectangular profile) lateral moving direction of the guide system.

[0046] In preparation for the manufacture, the security element strips 10, 12 are guided from the blow head or guiding device 34 to the squeeze rolls 28. This is achieved, for example, by the security element strips 10, 12 being transported, using blown air which is optionally also fed through the pipelines 38, from the guide 34 into the gap between the squeeze rolls 28. Only then the foil extrusion is started, i.e. the extruder 17 is put into operation. Alternatively, the coating sequence can be reversed for preparation by means of a threading device, by the guide strips being guided from the squeeze rolls 28 up to the guide 34. For this purpose, e.g. the squeeze rolls 28 are reversed. In the region of the guide 34, ends of security element strips are then attached to the ends of the guide strips present there, so that the security element strips are then pulled up from the stock thereof and used for the manufacture of the web 8.

[0047] As already described in the general part, the security element strip can also be a combined paper/foil strip.

List of reference signs

2 security substrate 4,6 security element 8 web , 12 security element strips 13, 14 foil ply 16 blown film extruder 17 extruder 18 thermoplastic plastic material blow head 22 blown air 24 foil tube 26 tube merging 28 squeeze roll 32 winder 36 bundle 38 pipeline roll pair

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A manufacturing method for a plastic security substrate having an embedded security element for a value document, wherein thermoplastic plastic material is blown up with a blown film extruder to form a foil tube, at least one security element strip is guided into the blown-up foil tube, and the foil tube with the interior security element strip is guided through squeeze rolls and connected into a web for the plastic security substrate.

2. The manufacturing method according to claim 1, wherein the at least one security element strip is pre-cooled before being incorporated into the blown-up foil tube.

3. The manufacturing method according to claim 1 or 2, wherein the at least one security element strip is guided with a guiding device up to the squeeze rolls, the guiding device having in particular a tube.

4. The manufacturing method according to claim 3, wherein before the squeeze rolls the security element strip is guided transversely displaceable and/or rotatable by at least 180 degrees.

5. The manufacturing method according to any one of claims 1 to 4, wherein several security element strips are introduced.

6. The manufacturing method according to claim 5, wherein the security element strips are introduced into a blow head of the blown film extruder in a common guide and within the blown-up foil tube are guided in individual guide elements to the squeeze rolls.

7. The manufacturing method according to any of claims 1 to 6, wherein prior to the start of the blow extrusion of the thermoplastic plastic material, the at least one security element strip is inserted between the squeeze rolls and guided through the blow head.

8. The manufacturing method according to claim 7, wherein blown air is blown through the blown film extruder to transport the at least one security element strip between the squeeze rolls.

9. The manufacturing method according to any one of claims 1 to 8, wherein the blown film extruder for manufacturing the web for the plastic security substrate with the embedded security element has a blow head for blowing up thermoplastic plastic material to form the foil tube and the squeeze rolls, wherein for guiding the at least one security element strip through into the blown-up foil tube, the blown film extruder has a guiding device which runs through the blow head and up to the squeeze rolls, so that the foil tube having the interior security element strip runs through the squeeze rolls and the blown film extruder connects the foil tube with the interior security element strip into the web for the plastic security substrate.

10. The manufacturing method according to claim 2 or claim 9, wherein the blown film extruder has a cooling device for pre-cooling the at least one security element strip before it is incorporated into the blown-up foil tube.

11. The manufacturing method according to anyone of claims 3, 9 and 10, wherein the guiding device has one pipe per security element strip.

12. The manufacturing method according to any one of claims 4 and 9 to 11, wherein the guiding device has at its end an exit end displaceable longitudinally to the squeeze rolls and/or rotatable by at least 180 degrees.

13. The manufacturing method according to claim 12, wherein the exit end is a roll guide.

14. The manufacturing method according to any one of claims 5 and 9 to 13, wherein the guiding device guides the several security element strips.

15. The manufacturing method according to claim 6 or claim 14, wherein the guiding device has the common guide for guiding the several security element strips through the blow head and, within the blown-up foil tube, leads each security element strip in the individual guide elements to the squeeze rolls.

16. A plastic security substrate with embedded security element strip, manufactured according to the manufacturing method of any one of claims 1 to 15, wherein the security element strip is a combined paper/plastic strip and/or appears to a viewer as two or more spatially separated different security elements.

17. An individualized value document having a plastic security substrate manufactured according to the manufacturing method of any one of claims 1 to 15 or having a plastic security substrate according to claim 16.