Self-adhesive fire protection seals

Abstract

The invention relates to an efficient manufacturing process for self-adhesive fire protection seals, in particular self-adhesive fire protection expansion strips, which utilize the manufacturing heat of the fire protection seals to achieve good internal adhesion, i.e. high separation forces between the layers of the self-adhesive fire protection seal, in particular the self-adhesive fire protection expansion strip. The invention further relates to a self-adhesive fire protection seal, preferably a self-adhesive fire protection swelling strip, produced by the process according to the invention, which has layers in the layer sequence, (a) first layer, (b) connecting layer, optionally (c) at least one further layer, (d) first pressure-sensitive adhesive layer, optionally (e) liner.

Description

The present invention relates to a method for producing self-adhesive fire protection gaskets, in particular self-adhesive fire protection swell strips, which swell in the event of a fire and thus form a barrier in order to inhibit the fire and to slow down the propagation of smoke and gases. In particular, the invention relates to the connection of freshly manufactured fire protection source strips to an adhesive tape. The invention is of importance in the fire protection industry sector.Fire protection gaskets, in particular fire protection swell strips, are used to create a fire protection barrier between different rooms or areas of a building. They are typically used in the form of flat, narrow strips which are placed on or near component joints or joints to form a barrier which prevents the fire from spreading.In many industrial states, industry standards exist for classifying construction materials and components, such as DIN 4102, for example. Typically, the fire protection gaskets contain a plastic component and an intumescent substance embedded in the plastic component. The plastic component serves to achieve flexible seals with a cross section adapted or adaptable to a location of use. The intumescent substance leads to a substance-specific volume increase when its so-called release temperature is exceeded. This property is due to its chemical composition which causes material to expand at high temperatures. Intumescent materials can consist of various chemical compounds, such as expanded graphite, expanded vermiculite or expanded perlite. In particular, by using large amounts of intumescent material, based on the total composition of the fire seal, a large volume increase can be achieved. By adding stabilizers for a foam formed in this process, a particularly reliable closure of building openings that is mechanically stable over a longer period of time is ensured.Fire protection gaskets, in particular fire protection swell strips, which contain intumescent materials, are generally produced by means of extrusion or calendering, wherein a thermoplastic polymer is combined with intumescent fillers and optionally further chemical compounds. The thermoplastic polymer is melted in an extruder or calender and the combined materials are subsequently forced through a die to obtain the desired shape. The extrusion temperature or calendering temperature varies depending on the type of intumescent material and the thermoplastic polymer used. During the extrusion process or calendering process, the materials are heated to the required temperature to melt the thermoplastic material without causing the intumescent material to be dislodged.After firestop gaskets containing intumescent materials have been extruded or calendered, they can be processed into various forms, such as sheets or strips. During extrusion, shaping can be effected, for example, by the extrusion die. The extruded or calendered fire retardant swell strips containing intumescent materials can also be laminated in combination with other materials to provide improved fire resistance.By laminating fire protection seals, in particular fire protection swell strips, with adhesive tapes, better adhesion to various surfaces can also be achieved. Adhesive tapes offer a simple and quick possibility of fastening fire protection seals, in particular fire protection swell strips, to various substrates. In this case, adhesive tapes of various designs and with different adhesives can be used in order to achieve optimum adhesion.Previous methods for producing self-adhesive fire protection gaskets, in particular self-adhesive fire protection source strips, usually involve the lamination of already produced fire protection source strips with pressure-sensitive adhesive. In this case, the pressure-sensitive adhesive is applied to the already cold fire protection source strip and then fastened by a special adhesive technique. However, such a method is time consuming and may result in uneven distribution of the pressure sensitive adhesive. Moreover, it is difficult to achieve optimum adhesion between fire protection swell strip and pressure sensitive adhesive.EP 1 207 183 A1 discloses a molding composition for producing fire protection seals. These molding compositions can have a high degree of filling of intumescent substance of up to 70 percent by weight of expandable graphite and form a first layer of the fire protection gasket. Such layers can be reworked in a further working step to form multilayer seals by, for example, laminating and the like.EP 0 305 852 B1 discloses a production method of fire-protected plastomeric or elastomeric sealing sheets which are laminated with fire-resistant components.DE 10 2005 008 786 A1 discloses a production method of a fire protection seal which consists of at least two layers which is free of additional adhesive at the contact points between the layers. In this case, in order to form the adhesive bond between two layers, at least one layer is heated to a pressure-sensitive adhesion temperature which is above the softening temperature of the thermoplastic elastomer or thermoplastic ethylene-vinyl copolymer, and in that at least one further layer is brought together with the layer heated in this way.Known production methods of fire protection seals such as fire protection source strips, in particular self-adhesive fire protection source strips, are not efficient, since these require additional energy expenditure, by heating the materials for lamination, and / or are complicated, since production takes place by means of a plurality of lamination steps of individual layers.It is an object of the invention to produce self-adhesive fire protection gaskets, in particular self-adhesive fire protection swell strips, efficiently, which use the heat of production of the fire protection gaskets in order to have good internal adhesion, i.e. high separating forces between the layers of the self-adhesive fire protection gasket, in particular of the self-adhesive fire protection swell strip.This object is achieved according to the invention by a method for producing a self-adhesive firestop seal, in particular a self-adhesive firestop swell strip, characterized in that a first layer, preferably produced by extrusion or calendering, comprising a first thermoplastic elastomer and an intumescent material is adhesively bonded to an adhesive tape comprising a first layer of pressure-sensitive adhesive and a bonding layer, by bringing the produced first layer together with the bonding layer at a contact zone at the beginning of the contact length, wherein the first layer has a temperature at the contact zone which is above the softening temperature of the first thermoplastic elastomer and below the release temperature of the intumescent material.A fire protection source strip is an example of a strip-shaped fire protection seal which contains intumescent material.The fire protection gaskets according to the invention are preferably manufactured by extrusion or calendering. In this case, a first layer is produced which comprises a first thermoplastic elastomer and an intumescent material. The mass fractions of the first thermoplastic elastomer and of the intumescent material can be varied within customary mass ratios for fire protection seals.In the present application, "manufactured first layer" means that the first layer for embedding the intumescent material is manufactured in a manufacturing process with temperatures above the softening temperature of the first thermoplastic elastomer. In order to have a sufficiently high temperature at the contact zone, the first layer has not yet cooled to room temperature or ambient temperature. The state of the first layer after leaving the production device, preferably the extruder or the calender, is thus described.The softening temperature is the temperature at which a material softens and its strength decreases. For polymeric material such as thermoplastic elastomers, it is the temperature at which the bond forces between the polymer chains weaken and the material begins to change shape. The thermoplastic elastomer can also be used in particular as a high-temperature-resistant thermoplastic in amorphous, partially crystalline or crystalline form. Depending on the solid-state modification, the softening temperature can also comprise a temperature range which begins above a temperature which is characterized by a considerable change in the modulus of elasticity. The softening temperature of a thermoplastic is to be determined, for example, according to Vicat (ISO 306).For the production of the first layer, it has been found to be advantageous that polyethylene (PE), polypropylene, polybutylene, polystyrene, polyvinyl acetate, polyvinyl chloride (PVC), polyethylene furanoate (PEF), polyethylene terephthalate, polyoxymethylene, polyamide, ethylene vinyl acetate (EVA), copolyester, and / or derivatives thereof, a combination thereof and / or a plasticizer is used as the first thermoplastic elastomer. These thermoplastic elastomers are particularly easy to process on the one hand and can bond the intumescent substance on the other hand. As intumescent substance, expandable graphite with a release temperature above about 140° C. and higher is particularly suitable.In a preferred embodiment, the first layer is produced by extrusion or calendering. Particularly preferably, the first layer is produced by extrusion.In the method according to the invention, the manufactured hot first layer is adhesively bonded to an adhesive tape comprising a first layer of pressure-sensitive adhesive and a bonding layer by bringing the manufactured first layer together with the bonding layer at a contact zone at the beginning of the contact length. The first layer is preferably a freshly manufactured, still hot first layer.In the present application, an adhesive connection is understood to mean a mechanical cohesion, i.e. sufficient adhesion forces between the layers involved, which is present after cooling at room temperature.By bringing the manufactured first layer together with the connecting layer of the adhesive tape, at a contact zone at the beginning of the contact length, the connecting layer is heated. The connecting layer is configured such that the heating leads to softening of the connecting layer, whereby improved wetting and / or mixing of the layers involved, the first layer and the connecting layer, is achieved.The contact zone is the region where the first layer and the adhesive tape are brought together. This is effected, for example, by the manufactured first layer with exit from the manufacturing facility being guided onto the connecting layer of the adhesive tape which is transported continuously. The bringing together of the two layers at the contact zone thus defines the beginning of the contact length.According to the usual understanding, an adhesive tape is understood to mean a strip-shaped structure which is provided with pressure-sensitive adhesion and may or may not have a carrier material. The adhesive tape of the layer structure according to the invention comprises at least one first pressure sensitive adhesive layer and one connecting layer. In addition, the construction of the adhesive tape is fundamentally arbitrary. The adhesive tape can comprise one or more carrier materials or carrier layers, which can consist of all common materials, in particular thus of films or else of foams. The adhesive tape can also comprise any desired functional layers, for example barrier layers.The first pressure-sensitive adhesive layer of the self-adhesive fire protection source strip is designed in such a way as to fasten the self-adhesive fire protection seal to its place of application.The connecting layer is part of the adhesive tape. The connecting layer is preferably a second pressure sensitive adhesive layer, a heat sealable layer or a carrier material, particularly preferably a second pressure sensitive adhesive layer or a heat sealable layer.The adhesive tape is selected from a single-sided adhesive tape and a double-sided adhesive tape.The first layer is preferably applied to the connecting layer of the adhesive tape directly after it leaves the production plant, preferably from the extruder or from the calender. In this case, the amount of energy supplied to the production plant is used to connect the adhesive tape to the first layer.In a preferred embodiment, the adhesive tape has room temperature at the contact zone. This means that the adhesive tape is present at room temperature before heat exchange with the first layer.For the purposes of the invention, no active heating process of the first layer takes place after production or production of the first layer and before contacting with the adhesive tape.In a preferred embodiment, no active heating process of the adhesive tape takes place before contacting with the first layer.The production method preferably has no additional, active process steps between the production of the first layer and the connection to the adhesive tape, which steps comprise an active temperature change by heating or cooling. Passive or non-active process steps are, for example, the transport or cooling of the material by the ambient temperature.The bringing together of the first layers at the contact zone, which have different temperatures, is advantageous since the effort for cooling the first layer is reduced.The production method comprises connecting the produced, first layer with an adhesive tape in a continuous process.The manufactured first layer has a temperature at the contact zone which is at least 20° C., preferably at least 40° C., particularly preferably at least 50° C., higher than the softening temperature of the connecting layer. As described above, the temperature is selected such that it is below the initiation temperature of the intumescent material.The production method according to the invention comprises the lamination of manufactured, still hot fire protection source strips with a multilayer adhesive tape in a continuous process.In one embodiment, the bonding layer comprises a second thermoplastic elastomer. Polyethylene (PE), polypropylene, polybutylene, polystyrene, polyvinyl acetate, polyvinyl chloride (PVC), polyethylene furanoate (PEF), polyethylene terephthalate, polyoxymethylene, polyamide, ethylene vinyl acetate, copolyester and / or derivatives thereof, a combination thereof and / or a plasticizer is used as the second thermoplastic elastomer. Preferably, the bonding layer comprises ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), copolyester or polyethylene (PE).In one embodiment, the bonding layer comprises a thermopoastic elastomer.In one embodiment, the connecting layer comprises at least 80 wt %, preferably at least 90 wt %, particularly preferably at least 95 wt % of a second thermoplastic elastomer.In one embodiment, the bonding layer is comprised of a second thermoplastic elastomer.Preferably, the first and second thermoplastic elastomers comprise materials that are miscible with each other. Miscible thermoplastic elastomers typically have a similar chemical structure based on similar monomers and have similar melting temperatures.In one embodiment, the bonding layer is a carrier layer, a heat sealable layer, or a pressure sensitive adhesive layer.In one embodiment, the bonding layer is a backing layer.Backing layers in adhesive tapes provide support to the adhesive and stabilize the tape. This allows the adhesive tape to maximize its adhesion to a variety of surfaces and increase its resistance to cracks, abrasion and moisture. Some examples of materials which can be used as backing layer in adhesive tapes are polypropylene (PP), polyvinyl chloride (PVC), copolyester, paper, fabrics such as cotton or nylon, and foam.In a preferred embodiment, the tie layer is a heat sealable layer.Heat sealable layers in adhesive tapes are layers which upon heating can form a strong and durable weld to another surface. These layers are usually made of thermoplastic elastomers such as polyolefins, polyamides, copolyesters or ethylene-vinyl acetate copolymers and are available in various thicknesses and sizes.In one embodiment, the adhesive tape comprises an asymmetric PET film having a co-extruded side, with the layer sequence, copolyester-PET, wherein the adhesive tape preferably has a layer sequence, copolyester-PET-first pressure sensitive adhesive.In one embodiment, the bonding layer is a second pressure sensitive adhesive layer.A pressure sensitive adhesive layer comprises a pressure sensitive adhesive. According to the invention, a pressure-sensitive adhesive or a pressure-sensitive adhesive is understood as meaning, as is customary in general usage, a substance which is permanently tacky and tacky at least at room temperature.A characteristic of a pressure-sensitive adhesive is that it can be applied to a substrate by pressure and remains adhering there, the pressure to be applied and the duration of action of this pressure not being defined in any more detail. In general, but fundamentally depending on the exact type of pressure-sensitive adhesive and the substrate, the temperature and the air humidity, the action of a short-term minimum pressure, which does not go beyond a slight contact for a short moment, is sufficient to achieve the adhesion effect; in other cases, a longer-term action duration of a higher pressure may also be necessary.Pressure sensitive adhesives have particular, characteristic viscoelastic properties which lead to permanent tackiness and adhesiveness. It is characteristic of these that, if they are mechanically deformed, both viscous flow processes and the build-up of elastic restoring forces occur. With regard to their respective proportion, both processes are in a specific ratio to one another, depending both on the precise composition, the structure and the degree of crosslinking of the PSA and on the rate and duration of the deformation and on the temperature.The proportional viscous flow is necessary to achieve adhesion. Only the viscous components, frequently caused by macromolecules with relatively great mobility, permit good wetting and good flow onto the substrate to be bonded. A high proportion of viscous flow leads to a high pressure-sensitive adhesiveness (also referred to as tack or surface adhesiveness) and thus often also to a high adhesion. Highly crosslinked systems, crystalline or glassyally solidified polymers, are generally not tacky or at least only sparingly tacky, owing to the absence of flowable constituents.The proportional elastic restoring forces are necessary to achieve cohesion. They are caused, for example, by very long-chain and strongly entangled macromolecules and by physically or chemically crosslinked macromolecules and make it possible to transmit the forces acting on an adhesive bond. As a result, an adhesive connection can withstand a permanent load acting on it, for example in the form of a permanent shear load, to a sufficient extent over a relatively long period of time.For a more detailed description and quantification of the measure of elastic and viscous component as well as the ratio of the components to each other, the quantities storage modulus (G') and loss modulus (G") determinable by means of dynamic mechanical analysis (DMA) are used. G' is a measure of the elastic fraction, G" is a measure of the viscous fraction of a substance. Both variables are dependent on the deformation frequency and the temperature.The quantities can be determined with the aid of a rheometer. The material to be examined is exposed to a sinusoidal oscillating shear stress, for example in a plate-plate arrangement. In shear stress controlled devices, the deformation as a function of time and the time offset of this deformation with respect to the introduction of the shear stress are measured. This time offset is referred to as phase angle δ.The storage modulus G' is defined as follows: G' = (τ / γ)·cos(δ) (τ = shear stress, γ = deformation, δ = phase angle = phase shift between shear stress and deformation vector). The definition of the loss modulus G" is: G" = (τ / γ)·sin(δ) (τ = shear stress, γ = deformation, δ = phase angle = phase shift between shear stress and deformation vector).A composition is especially considered to be a pressure-sensitive adhesive composition and is defined in the sense of the invention as such in particular when at 23° C. in the deformation frequency range of 10 0 to 10 1 rad / sec, both G' and G" are at least partly in the range of 10 3 to 10 7 Pa. "Partly" means that at least a portion of the G' curve lies within the window spanned by the deformation frequency range of 10 0 to 10 1 rad / sec (abscissa) inclusive and the range of the G' values of 10 3 to 10 7 Pa (ordinate) inclusive, and when at least a portion of the G" curve is also within the corresponding window.In order to ensure reliable use of the fire protection source strip, it is advantageous for the pressure-sensitive adhesive layer of the self-adhesive fire protection source strip to have a high temperature resistance, that is to say to maintain properties at high temperatures, without it changing its structure or properties.Pressure-sensitive adhesives with high temperature resistance are, for example, acrylate adhesives and silicone adhesives.Acrylate adhesives have a high temperature resistance and can remain stable at temperatures of up to 200° C. They are also resistant to UV rays and offer good adhesion to a large number of surfaces. Furthermore, acrylate adhesives are more cost-effective than alternative pressure-sensitive adhesives having a high softening point.Silicone adhesives have an even higher temperature resistance than acrylate adhesives and can remain stable at temperatures of up to 250° C. They are also resistant to UV rays and provide excellent adhesion to a variety of surfaces.In a preferred embodiment, the pressure-sensitive adhesive composition of the first pressure-sensitive adhesive layer is an acrylate adhesive.In a further embodiment, the adhesive tape is a double-sided adhesive tape, wherein the pressure-sensitive adhesive composition of the first and second pressure-sensitive adhesive layers is an acrylate adhesive.Polyurethane-based adhesives have good adhesion properties and a high resistance to weathering effects.In addition to the first pressure-sensitive adhesive layer and connecting layer, multilayer adhesive tapes may have further layers. Further layers serve, for example, to vary the mechanical properties of the adhesive tape and / or of the self-adhesive fire protection swell strip. Furthermore, the further layers serve, for example, to spatially separate functional layers such as, for example, the pressure-sensitive adhesive layer and the fire protection source strip from one another in order to prevent contamination from one layer to a further layer, which could have a negative effect on the functionality.Examples of further layers include a carrier layer and a barrier layer.In one embodiment, the adhesive tape has at least one barrier layer.Barrier layers in adhesive tapes prevent or reduce the penetration of moisture, air, dust or other substances. Barrier layers are used in adhesive tapes used in environments where high resistance to moisture or other elements is required. Some examples of materials that can be used as barrier layer in adhesive tapes are metal foil, polyethylene terephthalate (PET), polyethylene (PE), polyvinylidene difluoride (PVDF), acrylate adhesives, and silicone.In a preferred embodiment, the barrier layer comprises aluminum and / or polyethylene terephthalate (PET).Adhesive tapes which are coated on one or both sides with adhesives are usually wound up to form a roll or reel at the end of the production process. In order to prevent the pressure-sensitive adhesives from coming into contact with one another in the case of double-sided adhesive tapes, or in order to ensure easier rolling in the case of single-sided adhesive tapes, the adhesive is covered with a covering material (also referred to as release material) before the adhesive tape is wound. Such covering materials are known to the skilled person under the names release liner or liner. In addition to covering single-sided or double-sided adhesive tapes, liners are also used for covering labels. A liner or release liner is not part of an adhesive tape or label, but rather only an aid for its production, storage or for further processing. Moreover, unlike an adhesive tape carrier, a liner is not firmly bonded to an adhesive layer. Release liners used industrially are paper or film supports which are provided with an abhesive coating composition (also referred to as a dehesive or anti-adhesive composition) in order to reduce the tendency of adhering products to adhere to these surfaces (release-effective function). In general and correspondingly also in the case of the release liner (RL), a large number of different substances can be used as abhesive coating compositions, which are also referred to as release coating: waxes, fluorinated or partially fluorinated compounds and in particular silicones, and also various copolymers having silicone fractions. In recent years, silicones have become widely accepted as release materials in the field of adhesive tape application because of their good processability, low costs and the broad profile of properties. In addition, liners with polyolefin release layers have also become the focus of interest.In a preferred embodiment, the first pressure-sensitive adhesive layer of the adhesive tape is provided with a liner.A further aspect of the invention is a self-adhesive fire protection seal, preferably self-adhesive fire protection swell strip, produced by the method described above, which has layers in the layer sequence, (a) first layer, (b) connecting layer, optionally (c) at least one further layer, (d) first layer of pressure-sensitive adhesive, optionally (e) liner.In one embodiment, the self-adhesive fire protection seal, preferably self-adhesive fire protection swell strip, has layers in the layer sequence, (a) first layer, (b) connecting layer, (c) barrier layer, (d) first pressure sensitive adhesive layer, (e) liner.Measurement and Test MethodsThe release force, which is equivalent to the bond strength between the bonding layer of the adhesive tape and the first layer, was determined under a test climate of 23° C.+ / - 1° C. temperature and 50% + / - 5% rel. Humidity. The samples of the self-adhesive fire protection gaskets were cut to a width of 2 cm. The release force measurement was carried out using a tensile testing machine; the adhesive tapes were removed at the bonding layer from the first layer at an angle of 180° at a speed of 300 mm / min. The measurement results are given in N / 2 cm and are averaged from five individual measurements.The presence of cohesive fracture is checked by a person skilled in the art by visual examination.If the adhesive tape is detached or separated from the first layer during the determination of the separating force, without significant constituents of the first layer remaining on the adhesive tape, there is no cohesive fracture of the first layer.If significant parts of the first layer remain on the separated adhesive tape when determining the separating force, there is cohesive fracture of the first layer.Production of the Self-Adhesive Fire Protection Swell StripsThe fire protection swell strip was manufactured on an extruder, wherein the first thermoplastic elastomer comprises copolyester elastomers and expandable graphite was used as intumescent material. The following parameters were chosen for the extrusion:- Layer thickness: 2.00 mm;- feed rate: 90 kg / hr;- speed of extrusion: 1.72 m / min;Extrusion temperature range: 130-140°C.The mass fractions of the first thermoplastic elastomer and of the intumescent material can be varied within customary mass ratios for fire protection seals.The freshly produced, still hot flame retardant swell strip was brought together with an adhesive tape. After cooling to room temperature, the separating force between the fire protection swell strip and the adhesive tape was determined.In the experimental examples, adhesive tapes having an overall thickness (without liner) of 140 μm were used.Example 1 is an adhesive tape which has a layer sequence of PET with a layer thickness of 40 μm and acrylate adhesive with a layer thickness of 100 μm. The acrylate adhesive is provided with a paper liner.For Example 2 and Example 3, an adhesive tape was used which has a layer sequence of copolyester, PET and acrylate adhesive. The acrylate adhesive is provided with a paper liner. In Example 2, the copolyester and PET layers together have a layer thickness of 40 μm and the acrylate adhesive composition a layer thickness of 100 μm. In Example 3, the copolymer and PET layers together have a layer thickness of 50 μm and the acrylate adhesive has a layer thickness of 90 μm.When the adhesive tapes are brought together with the first layer, the paper liner is located in all examples on the side facing away from the first layer. Table 1: Results of Release Force Determination Table 1: Results of Release Force DeterminationExample 110,9No. NOExample 219,8YesExample 328,1YesFor example 1, an adhesive bond was formed. In the measurement of the separating force, no cohesive fracture of the first layer was observed.For Examples 2 and 3, a good adhesive bond was produced and good internal adhesion was observed, since a cohesive fracture of the first layer occurs before the adhesive tape is detached from the first layer.For all examples, no change in the bond strength of the first pressure-sensitive adhesive composition was found before and after production of the self-adhesive flame retardant seals.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 1 207 183 A1

[0008] EP 0 305 852 B1

[0009] DE 10 2005 008 786 A1

[0010]

Claims

Method for producing a self-adhesive fireproof seal, in particular a self-adhesive fireproof swell strip, characterised in that a first layer, preferably produced by extrusion or calendering, comprising a first thermoplastic elastomer; and an intumescent material; is adhesively bonded to an adhesive tape comprising a first layer of pressure-sensitive adhesive; and a connecting layer, by bringing the produced first layer together with the connecting layer at a contact zone at the beginning of the contact length, wherein the first layer has a temperature at the contact zone which is above the softening temperature of the first thermoplastic elastomer and below the release temperature of the intumescent material.Process according to Claim 1, characterized in that the first layer is brought together directly after production with the bonding layer of the adhesive tape.Process according to any of the preceding claims, characterized in that the adhesive tape has room temperature at the contact zone.The method according to any of the preceding claims, characterized in that the connecting layer of the adhesive tape is a second layer of pressure-sensitive adhesive, a carrier layer or a heat-sealable layer.Method according to one of the preceding claims, characterized in that the first layer has a temperature at the contact zone which is greater than at least 20°C, preferably at least 40°C, particularly preferably at least 50°C, higher than the softening temperature of the connecting layer.Method according to one of the preceding claims, characterized in that no active heating step takes place after production and before the layers are brought together.Method according to any one of the preceding claims, characterized in that the bonding layer comprises a second thermoplastic elastomer.Method according to claim 7, characterized in that the connecting layer comprises at least 80 wt.%, preferably at least 90 wt.%, particularly preferably at least 95 wt.% of a second thermoplastic elastomer.The method according to claim 8, characterized in that the first thermoplastic elastomer and the second thermoplastic elastomer are miscible.Method according to any one of claims 7 to 9, characterized in that the first and second thermoplastic elastomers independently of each other comprise ethylene-vinyl acetate copolymer (EVA), polyvinyl chloride (PVC), polyethylene (PE), copolyester or a combination of these materials.Process according to any of the preceding claims, characterized in that the multilayer adhesive tape comprises at least one further layer between the connecting layer and the first pressure-sensitive adhesive layer.Method according to one of the preceding claims, characterized in that the adhesive tape comprises a barrier layer.Process according to any of the preceding claims, characterized in that the first layer of pressure-sensitive adhesive of the adhesive tape is provided with a liner.Self-adhesive fire protection gasket, preferably self-adhesive fire protection source strip, produced by a method according to any of claims 1-13, which has layers in the layer sequence: (a) first layer, (b) connecting layer, optionally (c) at least one further layer, (d) first layer of pressure-sensitive adhesive, optionally (e) liner.Self-adhesive fire protection gasket, preferably self-adhesive fire protection source strip, according to claim 14, which has layers in the layer sequence: (a) first layer, (b) connecting layer, (c) barrier layer, (d) first pressure sensitive adhesive layer, (e) liner.