CA2993879A1

CA2993879A1 - Assembly adhesive tape and use of the assembly adhesive tape for the printing industry

Info

Publication number: CA2993879A1
Application number: CA2993879A
Authority: CA
Inventors: Michael Schuhmann; Jurgen Panhans; Alexander Betz
Original assignee: Infiana Germany GmbH and Co KG
Current assignee: Loparex Germany GmbH and Co KG
Priority date: 2015-07-27
Filing date: 2016-07-15
Publication date: 2017-02-02
Also published as: EP3328632A1; WO2017016904A1; DE102015112206A1

Abstract

The invention relates to an assembly adhesive tape (10) for the printing industry. The adhesive tape comprises a foam layer (1), a reinforcing carrier layer (2) arranged on the foam layer (1), and a first adhesive layer (3) arranged on the carrier layer (2). The carrier layer (2) has a tensile value of a force of at least 1 N at 1% elongation in the longitudinal direction and, at the same time, a resistance to tear propagation of more than 0.2 N in the longitudinal direction and/or transverse direction. The invention further relates to the use of the assembly adhesive tape (10) for the printing industry.

Description

P2015,0783 CA N January 25, Translation of PCT/EP2016/066919 Description Assembly adhesive tape and use of the assembly adhesive tape for the printing industry The invention relates to an adhesive assembly tape and to its use for the printing industry.
In nowadays customary printing processes, such as for newspaper or book printing, replaceable printing plates are in use. The printing plates can be applied to flat supports or else, in the case of flexible printing plates, to printing rolls. For the printing operation, the printing plate is inked and lastly is contacted with the material to be printed. The application and fixing of the replaceable printing plates necessitate adhesive assembly tapes.
For this purpose it is customary to make use of adhesive assembly tapes which feature a foam layer reinforced with a film.
Polyethylene films are often employed here as reinforcing film. While polyethylene (PE)-based films do permit a good printed image, they cannot usually, however, be detached without destruction from the substrate after use. For example, there may be problems during detachment from printing rolls. Besides PE-based films, polyester-based films (PET) are also employed. It is possible, for example, for oriented polyester films (o-PET) to be used, with "oriented" meaning that the films have been drawn.
Such films are generally easier to detach from the P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 2 -printing roll, but do not have satisfactory printing properties, a failing which is manifested in the printed image. Behavior similar to that of 0-PET is observed for oriented polypropylene films as well.
It is therefore an object of the invention to provide an adhesive assembly tape for the printing industry that is improved in relation to the disadvantages identified above.
This object is achieved by means of an adhesive tape according to main claim 1. Further embodiments of the adhesive assembly tape, and also the use of the adhesive tape for the printing industry, are subjects of further claims.
The invention relates to an adhesive assembly tape for the printing industry, said adhesive tape comprising - a foam layer, a reinforcing carrier layer disposed on the foam layer, and - a first adhesive layer disposed on the carrier layer, where the carrier layer has a tensile value of a force of at least 1 N at 1% elongation in the machine direction, and where the carrier layer also has a tear resistance of more than 0.2 N in the machine and/or cross direction.
The adhesive assembly tape may be used, for example, for applying a flat printing plate to a flat substrate.

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- 3 -Alternatively, for example, it may be used for applying a flexible printing plate to a printing roll.
The carrier layer may for example be a multi-ply carrier layer.
The term "on" here and below, may in each case mean "directly on"; i.e., in that case the layers have a common interface. Alternatively, "on" may mean that there are one or more interposed layers.
The term "machine direction" is the term customary within the art for "longitudinal direction" and is abbreviated to "MD". It refers to the running direction in the machine, in general, in connection with the processing of films or other layers of material (such as, for instance, layers of woven fabric, nonwoven web, polymer or laminate) which are guided over rollers in machines.
Winding or unwinding also takes place along this direction.
The direction perpendicular to the "machine direction"
is referred to, conversely, as the "cross direction". The term "cross direction" corresponds to the "transverse direction" and is abbreviated "CD". Materials of film or layer type may have different properties in machine and cross directions. In the text below, therefore, directionally dependent physical properties are in each case expressed relative to the machine or cross direction.

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- 4 -The term "elongation" refers to the ratio between change in length (Ln = L - Lo) due to an extent tensile force to the original length (Lo) of the carrier layer without a tensile force.
The tensile values provide information on the tensile properties of the carrier layer. They indicate the size of the force that must be expended in order to bring about a particular elongation of the carrier layer. The higher the tensile values, therefore, the higher the strength of the material. Materials having low tensile values are subject to greater elongation.
In the case of the present invention, the tensile properties were determined in accordance with the measurement provisions of DIN EN ISO 527-3 (July 2003 version). Accordingly, measurements for determining the tensile value (in N) were carried out with a sample width of 15 mm, a measuring velocity of 500 mm/min, and a pretensioning force of 0.1 N.
The tear resistance or notch strength is the capacity of a substance to resist further tearing even when a notch is present. The tear resistance therefore indicates the force which is sufficient to continue the tearing - that is to enlarge - a notch or a tear.
The tear resistance was determined according to the measurement provisions of DIN 53356 (August 1982 version). Accordingly, measurements were performed with a carrier layer having a width of 50 mm and a length of 100 mm at a measuring velocity of 300 ram/min.

P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 5 -The inventors of the present invention have found that adhesive tapes of the invention having a carrier layer which has a tensile value of a force of at least 1 N at 1% elongation in the machine direction and also has a tear resistance of more than 0.2 N in the machine and/or cross direction likewise permit a good printed image and improved detachment.
The inventors have recognized that a sufficient softness or elasticity of the carrier layer is necessary in order to obtain a good printed image. This is a result of the necessity, for a good printed image, that the carrier layer during the printing operation is not to distribute the pressure acting locally on it to the entire area of the foam layer, but instead is to deform only at the location at which the pressure acts on the adhesive assembly tape. Soft or elastic carrier layers therefore result in good printing quality. This explains the good printing properties when using conventional adhesive tapes with PE films as carrier layers.
The inventors have determined, however, that the use of excessively soft carrier layers, such as a PE film, for instance, does not allow undestructive and hence user-friendly detachment, since their strength is too low. The inventors have determined that adhesive assembly tapes of the invention having a tensile value of a force of at least 1 N at 1% elongation in the machine direction are indeed still sufficiently soft and elastic to enable a printed image of very good quality, but at the same time such tapes already have a strength which allows easier detachment of the adhesive tape after use. For example, . , P2015,0783 CA N
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- 6 -adhesive assembly tapes of the invention permit more easy detachment from printing rolls after use. Conversely, carrier layers having a tensile value of a force of less than 1 N at 1% elongation in the machine direction have proven to be too soft and, while they do allow a good printed image, they do not allow favorable properties on removal of the adhesive tape after printing.
The inventors have observed, moreover, that a tear resistance of more than 0.2 N in the machine and/or cross directions is necessary in order to permit both good detachment behavior and a good printed image. A carrier layer which has a high tear resistance is therefore a carrier layer which prevents high resistance to tear propagation even in the case of an incision. The inventors have determined that tear resistances of more than 0.2 N are necessary for good detachment behavior.
For the behavior of the carrier layer, the interplay of tensile value and tear resistance is critical. Only if the tensile value is at least 1 N at 1% elongation and also the tear resistance is more than 0.2 N does the material have the requisite mechanical properties.
According to one development of the invention, the carrier layer, which may also be a multi-ply or multilayer layer, has a basis weight overall of 20 to 100 g/m2, preferably 20 to 50 g/m2, more preferably 20 to g/m2, most preferably 22 to 28 g/m2.
The inventors of the present invention have determined that carrier layers which, in addition to the above-P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 7 -described tensile strengths and tear resistances, have a basis weight of at least 20 g/m2 possess particularly good strength and can therefore be detached particularly easily again from, for instance, a printing roll. Basis weights of less than 100 g/m2, as well as the associated saving in mate2:ial, have positive effects on the printed image.
In another embcdiment, the thickness of the carrier layer is between 10 and 400 pm, preferably between 20 and 250 pm, more preferably between 30 and 150 pm, more preferably stiLl between 40 and 100 pm, most preferably between 50 and 80 pm. These thickness ranges have proven to be particularly favorable for the carrier layer and its mechanical properties. Measurement provisions for the determination of thicknesses are found in DIN 53370 (November 2006 version). An estimation of the thickness with high reliability is possible via the basis weight, furthermore.
One embodiment of the invention relates to the adhesive assembly tape of the invention where the carrier layer has a tensile value of a force of at most 15 N, preferably at most 10 N, more preferably at most 8 N, especially preferably at nost 4 N at 1% elongation in the machine direction.
One development of the invention relates to the adhesive assembly tape of the invention where the carrier layer has a tensile value of a force of 1.5 N at 1% elongation in the machine direction. Carrier layers of this kind possess even higher strength, with further beneficial . .

P2015,0783 CA N
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- 8 -consequences for detachment behavior. At the same time, however, such materials are still soft and elastic enough for good printing properties.
A further embodiment of the adhesive assembly tape of the invention has a carrier layer which has a tear resistance of more than 0.5 N, preferably greater than 1 N, more preferably greater than 2 N, and most preferably greater than 3 N in the machine direction and/or cross direction.
Another development of the invention relates to the adhesive assembly tape of the invention where the carrier layer has a tear resistance of at most 15 N, preferably at most 10 N, more preferably at most 7 N in the machine direction and/or cross direction.
Carrier layers of these kinds ensure particularly effective reinforcement of the foam layer and significantly better detachment in combination with the good tensile values of the carrier layer of the adhesive tape of the invention.
Particularly preferred in this context are carrier layers which have the stated values for the tear resistances in each case both for the machine direction and for the cross direction.
In another development of the invention, the carrier layer has a tensile value of a force of 5 N to 19 N, preferably of 6 N to 18 N, more preferably of 7 to 17 N
at 10% elongation in the machine direction. The inventors have recognized that in the case of the tensile P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 9 -properties specifically, the best mechanical properties can be achieved both for printing quality and for the detachment process in the ranges specified for the tensile value. Tensile values that are too low lead to carrier layers which are too easily stretchable and therefore less effectively detachable. Tensile values that are too high suggest a lower elasticity.
Another embodiment of the adhesive tape of the invention has a carrier layer where the carrier layer has a tensile value of a force of at least 8 N, preferably at least 9 N, more preferably at least 10 N at 25% elongation in the machine direction. Tensile values of at least 8 N or higher at 25% elongation in the machine direction show particularly favorable mechanical properties and resistances.
A further embodiment of the adhesive assembly tape of the invention has a carrier layer where the carrier layer has an elongation at break of less than 1000%, preferably less than 600%, more preferably less than 300% in machine and cross directions.
Elongations at break of less than 80% are possible as well. Conversely, for example, conventional adhesive tapes with a o-PET carrier layer often have significantly higher elongations at break. The determination of the elongation at break, as a further key tensile property in addition to the tensile value, took place in the case of the present invention, in just the same way as for the tensile value, in accordance with the measurement provisions of DIN EN ISO 527-3 (July 2003 version).

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- 10 -The elongation at break is a physical characteristic which indicates the remaining lengthening of the sample up to fracture, based on the initial measured length.
It therefore also provides information on the stretch and elasticity and also stability behavior of the sample.
The inventors of the present invention have determined that an elongation at break of less than 1000% or even lower is particularly advantageous.
In a further embodiment, the material of the carrier layer of the inventive adhesive tape has a modulus of elasticity in machine and cross directions of less than 4000 N/mm2, more preferably less than 1000 N/mm2, most preferably less than 200 N/mm2. Moreover, the carrier layer preferably has a modulus of elasticity of at least N/mm2, preferably at least 30 N/mm2.
The modulus of elasticity was computed from the tensile property data, in other words from the tensile value and the cross-sectional area of material.
The modulus of elasticity provides information on the elongation as a function of the tensile stress applied.
It makes a statement on the elasticity of the carrier layer material used. It has emerged that materials with the stated values for the modulus of elasticity are particularly elastic and therefore allow particularly good printing quality.

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- 11 -According to another preferred embodiment, the tear force of the carrier layer in the machine direction is less than 30 N, more preferably less than 20 N.
The tear force is the tensile force at which the carrier layer tears. Materials having particularly high tear forces usually lack sufficient flexibility to allow a good printed image.
In one preferred embodiment of the adhesive assembly tape of the invention, the carrier layer comprises a woven-fabric or nonwoven layer or a laminate comprising the woven-fabric or nonwoven layer. This may in particular be a continuous, all-through woven-fabric or nonwoven layer, or a laminate comprising a continuous woven-fabric or nonwoven layer. A "continuous layer" here may in particular be an all-through woven-fabric or nonwoven layer which has no passages and is therefore particularly stable mechanically.
Carrier layers comprising a nonwoven layer or a laminate comprising a nonwoven layer are particularly preferred.
Nonwoven layers have fibers which may for example be polymer fibers, which unlike the fibers in a woven fabric are not woven (hence the name) but instead are laid arbitrarily without being woven into one another. These layers therefore have a different structure from woven-fabric layers, which have a regular weave structure.
Nonwovens not only are inexpensive and simple to produce but also have significantly higher tensile strengths by comparison with conventional films based on polyolefin layers that are not nonwovens.

. .

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- 12 -For woven-fabric and nonwoven layers, in the case of the present invention, a large number of different polymers and polymer fibers can be used. Use may be made, for example, of polyolefins, polyamides or polyesters such as, for example, polyethylene terephthalate or polybutylene terephthalate.
It is, however, particularly preferred if the woven-fabric or nonwoven layer has fibers comprising a polyolefin. The inventors of the present invention have observed that woven-fabric and nonwoven layers based on polyolefins, more particularly based on polyethylene, polypropylene, polybutylene, and polyisobutylene, are particularly suitable for obtaining optimum elasticity and tensile properties on the part of the carrier layer, with polyethylene and polypropylene being the most preferred.
According to another development, the woven-fabric or nonwoven layer may have a basis weight of 10 to 50 g/m2, preferably of 11 to 25 g/m2, more preferably of 12 to 20 g/m2. Woven-fabric or nonwoven layers having the stated basis weights enable the desired mechanical properties to be achieved and, moreover, have a thickness especially suitable for the applications of adhesive tapes of the invention in the context of the printing operation.
One particularly preferred embodiment of the invention relates to the adhesive tape of the invention having a carrier layer which comprises a laminate that as well as the woven-fabric or nonwoven layer has a polymer layer.

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- 13 -The polymer layer of such a laminate may preferably be a continuous polymer layer configured as a polymer film.
For example, both the woven-fabric or nonwoven layer and the polymer layer may be continuous layers which are in direct contact with one another.
The inventors of the present invention have determined that a laminate comprising both a woven-fabric or nonwoven layer and a polymer layer allows especially favorable mechanical properties for carrier layers of adhesive assembly tapes. As a result of the combination it is also possible to achieve outstanding elasticity, of the kind vital for a good printed image. At the same time, it is also possible to attain a strength which satisfies exacting requirements in relation to detachment from the printing roll after the printing operation.
Adhesive assembly tapes having a carrier layer which comprises or consists of the stated laminate allow significantly improved detachment from the printing roll and also good quality on the part of the printed image.
The mechanical characteristics, in relation for instance to the tensile values and the tear resistance, are particularly suitable for this type of carrier layers.
The inventors have determined that in this way, surprisingly, the advantages of conventional adhesive tapes wherein a foam layer is reinforced with PE films (good printed image), and of adhesive tapes where the foam layer is reinforced with 0-PET films (nondestructive detachment from the printing roll), can be combined with one another without giving rise to the respective disadvantages.

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- 14 -The laminate may comprise or consist of the woven-fabric or nonwoven layer and the polymer layer. The laminate may be produced, for example, by extrusion of the polymer layer onto the woven or nonwoven layer. The laminate may be disposed within the adhesive tape in such a way that the woven-fabric or nonwoven layer is located on the side of the foam layer, while the polymer layer of the laminate is located on the side of the first adhesive layer of the adhesive tape. This arrangement is particularly suitable, since in this way a comparatively smooth surface on the side of the first adhesive layer is achieved. However, the opposite arrangement, in which the polymer layer lies on the side of the foam layer and the woven-fabric or nonwoven layer lies on the side of the first layer of adhesive is equally suitable as well.
According to another preferred development, the polymer layer of the laminate comprises a polyolefin, more particularly polyethylene or polypropylene or copolymers thereof. These materials are not only inexpensive but also preferable in relation to their mechanical properties.
With further preference, in the case of the laminate, not only the fibers of the woven-fabric or nonwoven layer, but also the polymer layer, in each case independently of one another, contain a polyolefin, which may in each case be, for example, polyethylene and/or polypropylene.
The most preferable is for the laminate to have a nonwoven layer comprising or consisting of PE or PP and for the P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 15 -laminate also to comprise a polymer layer which contains or consists of PE or PP. In this way, the layers can be easily joined to one another, durably and robustly.
This is possible, for example, by means of an extrusion coating operation in which the polymer layer is extruded onto the nonwoven layer. An intimate join between the layers may be achieved in particular by the melting of the polymer layer onto the nonwoven layer.
A further embodiment of the present invention relates to the adhesive assembly tape of the invention for the printing industry, where the carrier layer contains at least a first copolymer, more particularly a copolymer selected from the group of polyolefin copolymers. By way of example these are polypropylene copolymers, polyethylene copolymers, or mixtures thereof.
The inventors of the present invention have determined that through the use of copolymers it is possible to adapt the desired mechanical properties in terms of tensile properties and tear resistance particularly well to the requirements for the printing industry.
Homopolymers such as oriented polypropylene, for example, are conversely often too stiff for a good printed image to be obtained. In addition, their tear resistance is frequently inadequate, as can likewise be seen from the example of oriented polypropylene.
The use of copolymers, on the other hand, allows nondestructive detachment and a good printed image to be realized at the same time.

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- 16 -According to one preferred embodiment, the copolymer is a polyolefin copolymer comprising or consisting of at least two olefins of different kinds. The olefin copolymer is obtained by copolymerizing the at least two or exactly two olefins of different kinds. Polyolefin copolymers permit excellent setting of the mechanical properties for printing applications.
According to one preferred embodiment, the copolymer is a copolymer from the group of polypropylene copolymers, polyethylene copolymers, and mixtures thereof. These copolymers combine good tensile strengths with an unexpectedly high tear resistance.
By copolymerizing propylene with other, different monomers it is possible, for example, to improve the tear resistance relative to conventional polypropylene. The monomer other than propylene may be an olefin other than propylene. In a similar way, by copolymerizing ethylene with a monomer different from it, the tensile strength can be improved significantly relative to conventional polyethylene. In this case the monomer different from ethylene may likewise be an olefin.
According to one preferred embodiment, the first copolymer is a heterophasic copolymer. Such copolymers generally have a high impact strength.
With further preference, the heterophasic copolymer may be a heterophasic polypropylene copolymer.

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- 17 -In particular, the polymer in each case may be a heterophasic block copolymer. The heterophasic block copolymer consists preferably of two phases.
According to one preferred embodiment, the copolymer is what is called a pure-heterophasic block copolymer.
For example, the block copolymer may have a polypropylene block and a polyethylene block. In particular it may be a diphasic block copolymer, with both the polypropylene block and the polyethylene block each forming one phase.
Block copolymers of the types stated have proven to be especially suitable in terms of their mechanical properties. They allow good tensile values and sufficient tear resistances for use in the printing industry.
According to a further-preferred embodiment of the adhesive assembly tape of the invention, the reinforcing carrier layer contains a first copolymer which is an ethylene-propylene copolymer. The ethylene-propylene copolymer may consist of ethylene and propylene. That is, it is formed by polymerization of ethylene and propylene and is free from further monomers different from ethylene and propylene. Carrier layers comprising ethylene-propylene copolymers combine suitable tear resistances with very good tensile values and produce adhesive assembly tapes which are easy to detach and satisfy high standards in terms of printing quality.
Based on the ethylene-propylene copolymer, the fraction of ethylene may be between 4 and 20 weight percent and P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 18 -the fraction of propylene between 80 and 96 weight percent, for example. Preferably the fraction of ethylene is between 5 and 15 weight percent and the fraction of propylene is between 85 and 95 weight percent. These ranges have proven to be particularly suitable and enable excellent mechanical properties for the sector of the printing industry.
One preferred development of the invention relates to the adhesive assembly tape of the invention where the carrier layer additionally has a second copolymer, different from the first copolymer. The inventors have observed that the presence of a second copolymer makes the carrier layer softer, leading to a further improvement in the tear resistance and therefore supporting nondestructive detachment of the adhesive assembly tape.
One preferred embodiment of the development of the invention just mentioned relates to an adhesive assembly tape where the second copolymer has a melting point (Tm) of less than 140 C, preferably less than or equal to 120 C, and more preferably less than or equal to 100 C.
The use of copolymers having low melting points at this level enables the softness and stretchability of the carrier layer to be improved, with beneficial consequences for the tear resistance. For example, the second copolymer may comprise ethylene-vinyl acetate copolymers (EVA) or acrylate-based copolymers.
One particularly preferred embodiment of the adhesive assembly tape of the invention has as its second copolymer an acrylate-based copolymer, more particularly . , CA 02993879 2018-01-26 P2015,0783 CA N
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- 19 -a polyolefin-acrylate-based copolymer, i.e., a copolymer obtained by copolymerization of acrylate monomers and of olefin monomers different therefrom. With particular preference the acrylate-based copolymer may be an ethylene-butyl acrylate copolymer (EBA). For example, the acrylate-based copolymer may also be a methyl acrylate-butyl acrylate copolymer. Acrylate-based copolymers make the carrier layer softer and more stretchable and therefore increase its tear resistance.
One development of the embodiment just stated has as its second copolymer an ethylene-butylene acrylate copolymer (ERA), where the fraction of ethylene is preferably between 65 and 95 weight percent and the fraction of butyl acrylate is between 5 and 35 weight percent, based in each case on the ethylene-butyl acrylate copolymer.
With further preference, the ethylene-butyl acrylate copolymer has an ethylene fraction of between 75 and 90 weight percent and a butyl acrylate fraction of between 10 and 25 weight percent, especially preferably an ethylene fraction of between 82 and 88 weight percent and a butyl acrylate fraction of between 12 and 18 weight percent. With the fraction of the butyl acrylate relative to the ethylene-butyl acrylate copolymer it is possible to adjust the softness of the ethylene-butyl acrylate copolymer. The stated ranges permit optimum mechanical properties for the carrier layers comprising the second copolymer. A composition within this range is beneficial in particular for the printing quality.
A further embodiment relates to the adhesive assembly tape of the invention where the fraction of the first copolymer in the carrier layer is at least 40 weight P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 20 -percent based on the carrier layer, preferably at least 55 weight percent. For example, the fraction of the first copolymer, based on the carrier layer, may be between 40 and 100 weight percent, preferably between 55 and 90 weight percent, more preferably between 55 and 75 weight percent. The inventors of the present invention have recognized that a fraction of the first copolymer in these ranges generally allows good tensile values.
A further embodiment relates to the adhesive assembly tape of the invention where the fraction of the second copolymer in the carrier layer is at least 10 weight percent based on the carrier layer, preferably at least weight percent. For example, the fraction of the 15 second copolymer in the carrier layer may be between 10 and 60, preferably between 20 and 50, more preferably between 20 and 40 weight percent. The inventors of the present invention have recognized that carrier layers with a fraction of at least 10 weight percent of the 20 second copolymer have particularly favorable tear resistances. A further increase in the fraction of the second copolymer beyond 20 weight percent usually leads to a further improvement in the tear resistance.
Another embodiment of the invention relates to an adhesive assembly tape of the invention where the carrier layer is a multilayer film which comprises - a first layer, - a second layer, disposed on the first layer, and - a third layer, disposed on the second layer.

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- 21 -The carrier layer may for example have exactly three layers.
The use of at least three layers leads to an improvement in the stability of the carrier layer, which facilitates nondestructive handling of the adhesive assembly tape in the printing industry, and may also be useful for producing particularly low levels of scrap in manufacture.
Another embodiment relates to the adhesive assembly tape of the invention where the carrier layer is a multilayer film, as for example a multilayer blown film, which comprises - a first layer, and - a second layer, disposed on the first layer, where at least one of the two layers comprises the first and the second copolymers, while the other of the two layers is free of the second copolymer.
The inventors have recognized that layers which comprise the first copolymer but are free of the second copolymer allow particularly good tensile values. In contrast, layers which comprise the first and second copolymers permit the attainment of particularly good tear resistances. The inventors of the present invention have determined that multilayer films which comprise layers of both kinds produce carrier layers which combine particularly good tensile values and tear resistances with one another.

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- 22 -One preferred embodiment relates to the adhesive assembly tape of the invention where the carrier layer is a multilayer film, as for example a multilayer blown film, which comprises - a first layer, - a second layer, disposed on the first layer, and - a third layer, disposed on the second layer, where the first, second, and third layers each comprise the first copolymer.
If the carrier layer has three layers comprising the first copolymer, this is beneficial to the stability and tensile strength of the arrangement as a whole. Moreover, sufficient tear resistances are possible accordingly.
One particularly preferred embodiment relates to the adhesive assembly tape of the invention where the carrier layer is a multilayer film which comprises - a first layer, - a second layer, disposed on the first layer, and - a third layer, disposed on the second layer, where the first, second, and third layers each comprise the first copolymer, and where - either the first and third layers additionally comprise the second copolymer while the second layer is free of the second copolymer, - or the second layer additionally comprises the second copolymer while the first and third layers are free of the second copolymer.

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- 23 -For the arrangement in which the first and third layers each have the first copolymer but are free of the second copolymer, while the second layer comprises the first and second copolymers, carrier layers are obtained which have particularly good processing properties and stability.
The second copolymer (e.g., acrylate-based copolymers such as EBA or other copolymers such as EVA) usually has a lower melting point than the first copolymer. A layer comprising the first and second copolymers therefore has a lower thermal resistance than layers which have the first but not the second copolymer. For this reason an arrangement in which the second layer, in other words the middle layer, has the second copolymer while the outer layers (first and second layers) are free of the second copolymer is more temperature-stable. The less temperature-stable middle layer is protected by the outer, more temperature-resistant layers. A carrier layer of this kind may therefore be exposed to relatively high temperatures during the manufacturing procedure as well.
If the first and third layers each have the first and second copolymers, while the second layer has the first copolymer but is free of the second copolymer, this leads to an arrangement which is particularly preferred for the purpose of achieving high tear resistances. The inventors of the present invention have recognized that it is beneficial to the tear resistance of the overall multilayer film if the outer layers (first and third layers) are softer than the middle layer (second layer).
Since layers comprising the first and second copolymers are softer than layers comprising the first but not the second copolymer, the stated arrangement allows a further P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 24 -improvement to be achieved in the tear resistance of the carrier layer as a whole.
According to one development of the embodiment just described, the fraction of the first copolymer in the first and third layers is in each case independently of one another between 20 and 70 weight percent, preferably between 40 and 60 weight percent, more preferably between 45 and 55 weight percent.
According to another development of the embodiment just described, the fraction of the second copolymer in the first and third layers in each case independently of one another is between 20 and 70 weight percent, preferably between 40 and 60 weight percent, more preferably between 45 and 55 weight percent. For example, the first and third layers may each comprise the first copolymer with a fraction of 40 to 55 weight percent and the second copolymer likewise with a fraction of 40 to 55 weight percent, based on the respective layer.
According to one preferred embodiment, the first and third layers of the multilayer film are identical. This makes production easier.
According to another embodiment, there are no further polymers or copolymers present in the carrier layer apart from the first and second copolymers.
According to a further embodiment, the first and third layers of the multilayer film may in each case independently of one another comprise processing P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 25 -auxiliaries, such as antiblocking auxiliaries, for example.
According to a further embodiment, the second layer may have a fraction of the first copolymer of at least 60 weight percent, preferably at least 75 weight percent, while being free of the second copolymer. For example, the second layer may include a fraction of 75 to 90 weight percent of the first copolymer.
According to one development, the second layer of the multilayer film may comprise dyes, as for example dye particles. Effective coloring of the carrier layer is possible accordingly.
According to one preferred embodiment, the thickness of the first and third layers of the multilayer film independently of one another is in each case between 3 and 100 pm, preferably between 5 and 25 pm, more preferably between 7 and 10 pm.
According to a further embodiment, the thickness of the second layer of the multilayer film is between 4 and 200 pm, preferably between 7 and 40 pm, more preferably between 10 and 16 pm.
These thicknesses have proven highly suitable in each case for the printing method.
According to one particularly preferred embodiment, the multilayer film is a multilayer blown film. Carrier layers of this kind can be produced easily and without P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 26 -great technical effort and complexity, and allow properties of the respective individual layers to be combined. Blown films exhibit a high holding force, puncture resistance and tear resistance, and are therefore highly suitable, as recognized by the inventors, for use in the sector of the printing industry.
A further embodiment of the present invention relates to the adhesive assembly tape of the invention where the foam layer comprises a polymer. In principle it is possible here to use all common foam polymers, of the kind also employed in conventional adhesive tapes in the printing industry. Particularly suitable, however, are foam layers comprising foams based on polyacrylate, polyurethane, polyethylene, polypropylene, or copolymers based on ethylene and propylene. Also possible, in addition, are foams based on synthetic rubber, or silicone-based foams.
For example, the foam layer may comprise a foam material having a density of between 0.03 and 0.8 g/cm3, preferably between 0.06 and 0.7 g/cm3, more preferably between 0.09 and 0.3 g/cm3.
According to another embodiment, the thickness of the foam layer is at least 0.1 mm, preferably at least 0.2 mm, more preferably at least 0.5 mm.
According to a further embodiment, the thickness of the foam layer is at most 25 mm, preferably less than 10 mm, more preferably less than 5 mm, more preferably less than 2 mm. The thickness may also, however, be less than 1 mm.

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- 27 -According to another development, the adhesive tape of the invention has a second adhesive layer on that side of the foam layer that is remote from the carrier layer.
An adhesive assembly tape of this kind therefore has at least two adhesive layers. The first adhesive layer, disposed on the carrier layer, and the second adhesive layer, disposed on the foam layer, and specifically on that side of the foam layer that is remote from the carrier layer. In this case it is possible, for example, for the first adhesive layer to be disposed directly on the carrier layer, and the second adhesive layer directly on the foam layer.
An adhesive tape having two adhesive layers may be adhered by one of the adhesive layers to the substrate for printing, more particularly to a printing roll. The second adhesive layer may then be used to mount the printing plate, in particular a flexible printing plate, on the printing roll. These adhesive layers may have different adhesives, for example. The adhesive tape of the invention is affixed preferably via the second adhesive layer to the printing roll - which frequently has a metal or steel surface - whereas the first adhesive layer serves for the attachment and fixing of the printing plate.
In another embodiment of the adhesive tape of the invention, the foam layer and the carrier layer are joined to one another via an adhesion promoter layer, which is likewise an adhesive layer.

, . CA 02993879 2018-01-26 P2015,0783 CA N
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- 28 -In an embodiment different from this, the foam layer and the carrier layer are joined directly to one another via a common interface. In this case, the application of the two layers to one another may take place thermally during manufacture of the adhesive tape. The two layers are in this case heated, contacted in the heated state, and so joined durably to one another.
Adhesives for the layers of adhesive in the adhesive assembly tape are suitably, in each case independently of one another, adhesive materials, more particularly pressure-sensitive adhesive materials, based for example on acrylic, vinyl ether, natural or synthetic rubber-based materials, poly(alpha-olefins) and silicones.
One preferred embodiment of the adhesive tape of the invention relates to an adhesive tape where the first adhesive layer has a regular or irregular structure, more particularly grooves or fins.
By structuring the adhesive layer it is possible to steer air, which is included in the adhesive tape between, for example, the adhesive layer and further layers, in such a way that it is able to escape without problems during the printing process. This is an advantage in order to prevent unwanted air inclusions which may cause disruption during printing.
It is possible, furthermore, if the adhesive tape has a second adhesive layer, for that layer as well to have a P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 29 -regular or irregular structure, more particularly grooves or fins.
According to another preferred embodiment of the adhesive assembly tape of the invention, a top layer may be disposed on the first adhesive layer. This top layer can be removed prior to use. It allows the adhesive tape of the invention to be covered and hence allows the first adhesive layer to be protected (release liner). A top layer of this kind makes it possible in particular for the adhesive tape to be wound and hence more easily stored and transported.
It is possible, for example, for the top layer to have a structure, on the side facing the first adhesive layer.
For example, it is possible to achieve structuring of the adhesive layer by way of the structure of the top layer.
The invention relates, moreover, to the use of the adhesive assembly tape of the invention for the printing industry. The adhesive tapes of the invention are suitable for printing operations, since they are suitable for achieving images of high printing quality.
Furthermore, the use of the adhesive assembly tape of the invention for applying a flexible printing plate to a printing roll is particularly preferred.
The printing plate may for example comprise what are called clichés, of the kind employed customarily in the letterpress technology. For example, the printing plate may consist of or comprise a photopolymer or rubber. The P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 30 -printing roll may have, for example, a surface comprising a metal. For example, the printing roll may have a steel surface.
Particular preference is given to the use of the adhesive assembly tape of the invention for the process known as flexographic printing. The adhesive tapes of the invention can be used, for example, for applying and fixing flexographic printing plates, and in the context of the flexographic printing process they allow the fulfilment of high yardsticks in terms of printing quality, and user-friendly mounting before printing, and also the easy removal of the adhesive tape after printing.
The invention is elucidated in more detail below with reference to working examples and figures. Preferred embodiments of the invention are represented in the figures and are explained in more detail below.
Figure 1 shows a schematic representation of an adhesive tape (10) of the invention for the application and fixing of a printing plate. The adhesive tape has at least one foam layer (1). Disposed on the foam layer (1) is a carrier layer (2), which reinforces the foam layer (1) and so increases the stability of the adhesive tape. For example, the carrier layer (2) may be disposed directly on the foam layer.
Lastly, the adhesive tape has at least one adhesive layer (3). This first adhesive layer (3) is disposed on the carrier layer (2). It may for example be disposed directly on the carrier layer (2). The carrier layer (2) , . CA 02993879 2018-01-26 P2015,0783 CA N
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- 31 -is required to have defined mechanical properties. It is distinguished by a tensile value of a force of at least 1 N at 1% elongation in the machine direction, and at the same time possesses a tear resistance of more than 0.2 N
in the machine and/or cross directions.
Figures 2A and 23 show schematic representations of two further embodiments of the adhesive assembly tape (10) of the invention, comprising a foam layer (1), a carrier layer, and at least one first adhesive layer (3), the carrier layer (2) in both cases comprising a laminate (2a, 2b) or consisting of a laminate (2a, 2b). The laminate in each case has a woven-fabric or nonwoven layer (2a) with nonwoven layers being especially suitable on account of their favorable mechanical properties. The laminate moreover, in each case has a polymer layer (2b).
It is preferred for the polymer layer (2b), which may for example have a smooth surface, to form the outer layer, on which the first adhesive layer (3) is located (figure 2A). However, the opposite arrangement (figure 2B) is equally suitable as well.
Figures 3A and 33 show schematic representations of two further embodiments of the adhesive tape (10) of the invention. Figure aA shows an adhesive tape of the invention as in figure 1, but additionally having a second adhesive layer (4) which is disposed on that side of the foam layer (1) that is remote from the carrier layer (2). For example, the second adhesive layer (4) may have a common interface to the foam layer (1). This arrangement makes it possible to apply and fix a printing plate without using further adhesive materials. The P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 32 -carrier layer (2) of the arrangement shown in figure 3A
may, according to a further-preferred variant, possess in turn a laminate (as shown in figures 2A or 2B). The adhesive tape (10) of the invention, however, in addition to first and second adhesive layers (3, 4) may also have further adhesive layers. In particular it is possible -as shown in figure 3B - for individual layers of the adhesive tape to be joined to one another by a layer of adhesion promoter. In particular, an adhesion promoter layer (5) may be disposed between the foam layer (1) and the carrier layer (2). In this case as well, the carrier layer may comprise a laminate or consist of a laminate (as shown in figures 2A or 2B).
Figure 4 shows schematically a detail of a printing apparatus of the kind used in the printing industry for the purpose, for instance, of printing books or newspapers. The printing operation may take place, for example, by means of a printing roll (12) which is also referred to as a printing-forme cylinder. The printing plate (11) is applied to and fixed on the printing roll (12). This is made possible by the adhesive tape (10) of the invention. For example, by contact with a further roll (e.g., a so-called halftone roll; not shown), the printing plates (11) may be provided with a dye. The printing operation may take place in interplay with a further roll (13), also referred to as an impression cylinder. The initially unprinted material (14a) is guided over the roll (13), where it comes into contact with the printing plate (11) mounted on the printing roll (12) and inked, and can then be passed on in the printed state (14b) and worked on. From the arrangement it can , . CA 02993879 2018-01-26 P2015,0783 CA N
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- 33 -be seen that the adhesive tape (10) plays a significant part during the printing operation, by virtue of its arrangement, and exerts an influence on the printed image. The adhesive tape (10) of the invention not only allows easy mounting and good printing quality, but also facilitates the replacement of the printing plates (11), on the basis of its easy detachability.
Figure 5 compares measurements of the tensile properties carried out on different reinforcing carrier layers, the tensile value in N being placed in relation to the elongation in %. The measurements relate in each case to the properties in the machine direction.
The measurements shown in figure 5 relate to conventional materials for the carrier layer such as PE films (reference example 1), 0-PET films (reference example 2a) and 0-PP films (reference example 3), and also to carrier layers of the invention comprising a laminate ("nonwoven-PE laminate I" - example I and "nonwoven-PE laminate II" - example 2) and also to carrier layers of the invention comprising a copolymer ("PP copolymer (multilayer blown film)" - example 3).
The measurements were carried out in each case on the films or laminates which form the carrier layers in an adhesive tape - without the other constituents of the adhesive tape (foam layer, adhesive layers, etc.) - in order to enable better comparability and reproducibility.
The properties of the reinforcing carrier layers have proved to be key to the quality of printed image and to the detachment behavior of the adhesive assembly tapes.

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- 34 -Adhesive assembly tapes of the invention have reinforcing carrier layers whose tensile properties are depicted in a wide range (black line) limited by the outlined schematically in fig. 5. For example, the range may cover tensile properties of at least 1 N at 1% elongation up to a force of 18 N at 25% elongation in the machine direction (MD).
The physical properties of reference examples 1, 2a and 3, and the carrier layers of the invention, i.e., the laminates of the invention (examples 1 and 2), and also the carrier layers of the invention comprising at least one first copolymer (example 3) are summarized in table 1.
The measurement data from figure 5 demonstrates that PE
films undergo high elongation in the machine direction even under a very low applied force. PE films are very elastic and soft and therefore, while exhibiting good properties during printing, do not exhibit such properties when under high tensile loading during their removal from the printing roll after use. Standing in contrast with these films are o-PET films, i.e., oriented polyester films, which undergo deformation only when high tensile forces are applied. Their high strength allows easier detachment from the printing roll, but is also the reason for a reduced quality of the printed image.
Additionally, o-PET films offer very low tear resistance for the high tensile strength.
Relative to this, the inventors of the present invention have recognized that tensile properties lying between P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 35 -those of PE films and o-PET films offer the best mechanical properties for adhesive tapes in the context of printing operations. In this way, surprisingly, the advantages of different conventional systems can be combined. The range with the most suitable mechanical characteristics is drawn in schematically in the graph of figure 5. Surprisingly, precisely those tensile values in the range between the tensile values for the conventionally employed PE films and o-PET films are particularly suitable, the outlining in the graph serving here to illustrate this principle. The tensile properties of two examples for carrier layers of the invention which are laminates are shown in figure 5: "nonwoven-PE
laminate I" (example 1) and "nonwoven PE laminate II"
(example 2). In both cases the laminate is one having in each case a nonwoven polypropylene web with a basis weight of 12 g/m2, and also a polymer layer applied thereto by extrusion and comprising polyethylene, with a basis weight of 12 g/m2. The carrier layers each possess a total basis weight of 24 g/m2. Both carrier layers are notable for tensile behavior which lies between that of the conventional carrier films PE and o-PET. The inventors have determined that these tensile properties, in combination with the good tear resistances obtained (see table 2 in figure 6), allow optimum mechanical properties to be obtained for the printing operation and the handling of the adhesive tape.
Moreover, the inventors have observed that even carrier layers which comprise at least a first copolymer enable outstanding tensile values and tear resistances, which likewise fall within the outlined range shown in figure P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 36 -5. Carrier layers made of homopolymers such as, for instance, the o-PP film shown in figure 5 (a cast film consisting 100% of oriented polypropylene), generally have good tensile values, but are not soft enough to permit a good printed image. Conversely, carrier layers with at least one first copolymer exhibit the mechanical properties desired for printing and for detachment.
The carrier films investigated are described in table 1.
Table 1: Films for carrier layers in adhesive tapes Designation Description Thickness Density [pm] [g/cm3]
Reference example 1: Blown film of 30% LLDPE (Sabic LLDPE 118 PE film NE from SABIC) and 70% LOPE (Lupolen 25 0.922 2420F from Lyondellbasell) Reference example 2a: Oriented polyester film from Mitsubishi 12 1.4 "o-PET film l"
Reference example 2b: Oriented polyester film from Mitsubishi 23 1.4 "o-PET film II"
Oriented cast film (biaxially drawn) consisting Reference example 3: of 100% polypropylene (polypropylene 30 0.9 "0-PP film" homopolymer from !nos; melting point =
163 C; type designation: Amoco 100-GA03) Example 1: 12 g/m2 nonwoven polypropylene web with 12 "nonwoven-PE g/m2 extruded-on polyethylene layer from 70 n.a.
laminate l" lnfiana Example 2: 12 g/m2 nonwoven polypropylene web with 12 "nonwoven-PE g/m2 extruded-on polyethylene layer from 70 n.a.
laminate II" Infiana Three-layer blown film consisting of:
- about 63 wt% heterophasic ethylene-propylene copolymer (ethylene fraction about P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 37 -9 wt%) (PP copolymer: melting point = 164 C;
density 0.9 g/cm3; manufacturer: Braskem;
Example 3: type designation: Inspire 137) 30 0.955 "PP copolymer - about 27 wt% ethylene-butyl acrylate (multilayer blown filmy' copolymer (butyl acrylate fraction about 16 wt%) (EBA copolymer: melting point = 96 C;
density 0.924 g/cm3; manufacturer: Lucobit;
type designation: Lucofin 1400) - about 7 wt% color masterbatch and - about 3 wt% processing assistant *The detailed construction of the multilayer blown film of example 3 is elucidated further in table 2.
Example 3 presents a carrier layer which is a multilayer blown film, consisting in this specific case of three layers. The outer layers (first and third layers) are each identical and comprise an ethylene-propylene copolymer as first copolymer and an ethylene-butyl acrylate copolymer (EBA) as second copolymer. The ethylene-propylene copolymer itself enables good tensile values and sufficient tear resistances. The tear resistance is improved still further by the presence of EBA as a second copolymer.
The second layer has a high fraction of the ethylene-propylene copolymer and is free of EBA. This layer is beneficial for the acquisition of excellent tensile values.

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- 38 -Table 2: Multilayer film construction of a carrier layer in accordance with example 3 Layer 1 2 3 Example 3: 47.5% 813% 47.5%
"PP copolymer heterophasic heterophasic heterophasic (multilayer blown ethylene-propylene ethylene-propylene ethylene-propylene film)" copolymer (ethylene copolymer (ethylene copolymer (ethylene fraction about 9%) fraction about 9%) fraction about 9%) 47.5% 16.7% color 47.5%
ethylene-butyl masterbatch ethylene-butyl acrylate copolymer acrylate copolymer (butyl acrylate fraction (butyl acrylate fraction about 16%) about 16%) 5% 5%
processing auxiliary processing auxiliary (antiblocking) (antiblocking) Layer thickness in pm 8.5 13 8.5 A comprehensive comparison of the mechanical properties of examples 1 and 2 and also of reference examples 1, 2a and 2b, both for the machine direction "MD" and for the cross direction "CD" is summarized in table 3, which is shown in figure 6. The mechanical properties of the laminates of the invention (examples 1 and 2) lie between the properties of the PE film (reference example 1) and of the o-PET films (reference examples 2a and 2b).
A similar comparison can be seen in table 4 which is shown in figure 7. Reference example 3 is a homopolymer (o-PP film), while example 3 relates to a carrier layer comprising a polypropylene copolymer. In terms of the mechanical properties, the copolymer ("PP copolymer, multilayer blown film") is situated between reference example 3 (o-PP film) and reference example 1 (PE film).

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- 39 -Adhesive assembly tapes of the invention can be produced, for example, as follows. First of all, the foam layer (e.g. a PE or PP foam layer as may be obtained commercially) and the carrier layer are provided.
The carrier layer may as described be a laminate.
Laminates of the invention are produced by providing a woven-fabric or nonwoven layer, to which a polymer layer is applied and fixed. In the case of examples 1 and 2, a nonwoven layer of polypropylene was used in each case.
Nonwoven layers of this kind can be produced by conventional methods or acquired commercially. Applied to the woven-fabric or nonwoven layer is then the polymer layer, application taking place by means for example of extrusion coating. A good, durable connection can be achieved through melting. In the case of examples 1 and 2, a PE polymer layer was extruded onto the PP nonwoven layer in each case, and was subsequently melted on.
Alternatively, the carrier layer, as described, may also be a layer comprising a copolymer. It may for example as described be a multilayer blown film comprising the PP
copolymer. A multilayer blown film of this kind may be manufactured in accordance with the customary extrusion and blowing methods for films.
The resulting carrier layer may subsequently either be adhered to the foam layer or joined to it thermally by melting. In the case of adhering, an adhesion promoter layer is first applied either to the carrier layer or the foam layer, and then the layers are joined. Lastly, the P2015,0783 CA N January 25, Translation of PCT/EP2016/066919

- 40 -first adhesive layer is applied to the carrier layer. The second adhesive layer can be applied analogously on the foam layer.
The invention is not confined by the description in relation to the working examples. Instead, the invention encompasses every new feature and also every combination of features, including in particular each combination of features in the claims, even if that feature or that combination is not itself explicitly set out in the claims or working examples.

Claims

1. An adhesive assembly tape (10) for the printing industry, said adhesive tape comprising - a foam layer (1), - a reinforcing carrier layer (2) disposed on the foam layer, and - a first adhesive layer (3) disposed on the carrier layer (2), where the carrier layer (2) has a tensile value of a force of at least 1 N at 1% elongation in the machine direction, and where the carrier layer (2) also has a tear resistance of more than 0.2 N in the machine and/or cross direction.

2. The adhesive assembly tape (10) according to the preceding claim, where the carrier layer (2) has a basis weight of 20 to 100 g/m2, preferably 20 to 50 g/m2.

3. The adhesive assembly tape (10) according to either of the preceding claims, where the carrier layer (2) has a tensile value of a force of at least 1.5 N at 1%
elongation in the machine direction.

4. The adhesive assembly tape (10) according to any of the preceding claims, where the carrier layer (2) has a tear resistance of more than 0.5 N, preferably greater than 1 N, in the machine and/or cross direction.

5. The adhesive assembly tape (10) according to any of the preceding claims, where the carrier layer (2) has a tensile value of a force of 5 N to 19 N, preferably of 6 N to 18 N, at 10% elongation in the machine direction.

6. The adhesive assembly tape (10) according to any of the preceding claims, where the carrier layer (2) has a tensile value of a force of at least 8 N, preferably at least 9 N, at 25% elongation in the machine direction.

7. The adhesive assembly tape (10) according to any of the preceding claims, where the carrier layer (2) has an elongation at break in the machine and cross directions of less than 1000%, preferably less than 600%.

8. The adhesive assembly tape (10) according to any of the preceding claims, where the carrier layer (2) has a woven-fabric or nonwoven layer (2a) or a laminate comprising the woven-fabric or nonwoven layer (2a).

9. The adhesive assembly tape (10) according to claim 8, where the woven-fabric or nonwoven layer (2a) has fibers comprising a polyolefin, more particularly polyethylene or polypropylene.

10. The adhesive assembly tape (10) according to claim 8 or 9, where the woven-fabric or nonwoven layer (2a) has a basis weight of 10 to 50 g/m2, preferably of 11 to 25 g/m2.

11. The adhesive assembly tape (10) according to any of claims 8 to 10, where the laminate has a polymer layer (2b) as well as the woven-fabric or nonwoven layer (2a).

12. The adhesive assembly tape (10) according to claim 11, where the polymer layer (2b) of the laminate contains a polyolefin, more particularly polyethylene or polypropylene.

13. The adhesive assembly tape (10) according to any of claims 1 to 7, where the carrier layer (2) contains a first copolymer, more particularly a copolymer selected from the group of polyolefin copolymers.

14. The adhesive assembly tape (10) according to claim 13, where the copolymer is an ethylene-propylene copolymer.

15. The adhesive assembly tape (10) according to either of claims 13 and 14, where the carrier layer (2) additionally has a second copolymer, different from the first copolymer.

16. The adhesive assembly tape (10) according to claim 15, where the second copolymer has a melting point (Tm) of less than or equal to 140 C, more particularly less than or equal to 100 C.

17. The adhesive assembly tape (10) according to either of claims 15 and 16, where the second copolymer is an acrylate-based copolymer, more particularly an ethylene-butyl acrylate copolymer (EBA).

18. The adhesive assembly tape (10) according to any of claims 13 to 17, where the fraction of the first copolymer in the carrier layer is at least 40 weight percent based on the carrier layer (2), preferably at least 55 weight percent.

19. The adhesive assembly tape (10) according to any of claims 13 to 18, where the fraction of the second copolymer in the carrier layer is at least 10 weight percent based on the carrier layer (2), preferably at least 20 weight percent.

20. The adhesive assembly tape (10) according to any of claims 13-19, where the carrier layer (2) is a multilayer film which comprises - a first layer, - a second layer, disposed on the first layer, and - a third layer, disposed on the second layer.

21. The adhesive assembly tape (10) according to any of claims 1 to 20, where the foam layer (1) contains a polymer, more particularly at least one of the polymers selected from the following group: polyacrylate, polyethylene, polypropylene, and polyurethane.

22. The adhesive assembly tape (10) according to any of claims 1 to 21, further comprising a second adhesive layer (4) disposed on that side of the foam layer (1) that is remote from the carrier layer.

23. The adhesive assembly tape (10) according to any of claims 1 to 22, where the first adhesive layer has a regular or irregular structure, more particularly grooves or fins.

24. The use of the adhesive assembly tape (10) of claims 1 to 23 for the printing industry.

25. The use of the adhesive assembly tape (10) according to the preceding claim for applying a printing plate (11) to a printing roll (12).

26. The use of the adhesive assembly tape (10) according to either of claims 24 and 25 in flexographic printing.