Brush, method for manufacturing a brush and brush-making apparatus

Abstract

The invention relates, among other things, to a brush (1) with a bristle carrier (2) and a bristle arrangement (3) made of bristle filaments (4). The brush (1) is characterized by a bonding layer (5) to which the bristle arrangement (3) is metallurgically connected and by which the bristle arrangement (3) is fixed to the bristle carrier (2), wherein the bonding layer (5) consists of a material suitable for metallurgical bonding with the bristle filaments (4), but of a different material than the bristle carrier (2).

Description

BE2025 / 5409 2 ensure. A method for manufacturing brushes of the aforementioned type is known, for example, from publication EP4032432A2. In both known methods, it is provided that the bristle carrier and the attachment-side ends of the bristle filaments of the bristle assembly are heated and the attachment-side ends of the bristle filaments are melted in contrast to the bristle carrier, after which the bristle carrier and the bristle filaments of the bristle assembly are joined together. This type of connection of the bristle filaments to the bristle carrier has proven successful, but requires that the bristle filaments and the bristle carrier consist of materials that can be fused or welded together. Bristle filaments are often made of polyamide, whereas bristle carriers of brushes, especially toothbrushes, are preferably made of polypropylene.However, bristle filaments, for example made of polyamide, cannot be reliably bonded to bristle carriers made of polypropylene using the method described in EP4032432A2. The object of the invention is therefore to enable the manufacture of brushes which preferably have thin-walled bristle carriers made of a material that differs from the material of which the bristle filaments of the brushes are made. To solve this problem, a brush with the features of the independent claim directed to a brush is first proposed. Thus, to solve this problem, a brush, in particular a toothbrush, is proposed which has a bristle carrier, a bristle arrangement made of bristle filaments, and a bonding layer to which the bristle arrangement is bonded and by which the bristle arrangement is fixed to the bristle carrier.According to the invention, the 30 bonding layer consists of a material suitable for a material-bonded connection by fusion and / or welding with the bristle filaments, which differs from the material of which the bristle carrier is made. In this way, it is possible to select the materials of which the bristle filaments of the bristle assembly on the one hand and the bristle carrier 5 on the other hand are made, irrespective of their suitability for a material-bonded connection of the bristle carrier with the bristle filaments by fusion and / or welding. The material for the bristle carrier can then be selected, for example, according to its technical properties, its availability 10 and / or its current price. The same applies to the material of which the bristle filaments are made.Overall, a brush can be provided which, due to the freedom in the choice of materials for its components, exhibits optimized performance characteristics and can nevertheless be manufactured particularly efficiently and economically, even with thin-walled bristle carriers. In one embodiment of the brush, it is provided that the bonding layer and the bristle filaments consist of the same material family, in particular the same plastic family, or of the same material, in particular the same plastic. This enables a particularly simple and reliable material-bonded connection between the bristle filaments and the bonding layer of the brush by fusing and / or welding. The bristle assembly can, for example, be material-bonded and / or fused to the bonding layer. The bristle assembly can be butt-jointed with its bristle filaments to the bonding layer.This means that the bonding layer does not have continuous receiving holes for the bristle filaments and is not penetrated by the bristle filaments of the 30 bristle assembly. The bristle filaments are therefore not inserted into the bonding layer. This simplifies the provision of the bonding layer. The bristle filaments are then butted together with the bonding layer at their attachment-side ends on a surface of the bonding layer. In one design of the brush, the bonding layer is clipped into the 5 bristle carrier and / or welded and / or bonded to the bristle carrier, in particular by means of ultrasound. The bonding layer can thus be mechanically connected to the bristle carrier or materially bonded to and fixed to the bristle carrier.10 In the case of mechanical fixation of the bonding layer to the bristle carrier, the bonding layer can be positively fixed to the bristle carrier by an undercut of the bristle carrier and / or an undercut of the bonding layer.In a preferred embodiment of the brush, it is provided that the bonding layer is overmolded with the bristle carrier. The bonding layer is thus an integral component of the bristle carrier and is already connected to the bristle carrier before the bristle filaments of the bristle assembly are ultimately connected to the bonding layer to complete the brush. If the bonding layer is overmolded with the bristle carrier, it is advantageous to use a bonding plate as the bonding layer. When the bonding layer is overmolded with the bristle carrier, a form-fit and / or material-fit connection can be created between the bonding layer and the bristle carrier. In one design of the brush, the bonding layer can also be cast and / or dripped and / or injected into a receptacle of the bristle carrier in a flowable form and hardened in the receptacle of the bristle carrier under, in particular, a form-fitting and / or material-fitting connection with the bristle carrier.2025 / 5409 BE2025 / 5409 5 The bristle carrier and the bristle pack and / or the bristle carrier and the bonding layer may be made of different plastics. In particular, if the bristle carrier and the bonding layer are made of different plastics which do not allow a reliable 5 material-bonded connection to each other by fusing and / or welding, it is advantageous to join the bonding layer and the bristle carrier in a form-fit manner, for example by means of at least an undercut of the bristle carrier and / or the bonding layer. 10 The bristle carrier is particularly preferably made of polypropylene. Polypropylene is a common material for the manufacture of bristle carriers for brushes, especially toothbrushes, and is characterized by its particularly good performance characteristics and its stability.Particularly when the bristle carrier is designed as a brush body15, i.e., has a carrier section for attaching the bristle arrangement and a handle section for handling the brush, it is advantageous if the bristle carrier is made of polypropylene. Tests have shown that it is advantageous if the bonding layer is made of a polyamide, in particular PA6.12, PA6.10, PA10.10 and / or PA12, of copolyester, of polybutylene terephthalate (PBT), polyethylene terephthalate (PET), recycled polyethylene terephthalate (R-PET), polyethylene terephthalate modified with glycol (PETG) and / or of polycyclohexylenedimethyl terephthalate (PCTG) or of a plastic mixture, in particular comprising25 polyamide, in particular PA6.12, PA6.10, PA10.10 and / or PA12, copolyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), recycled polyethylene terephthalate (R-PET), polyethylene terephthalate, modified with glycol (PETG) and / or polycyclohexylenedimethyl terephthalate (PCTG) and / or consisting of at least 30% of an additive, in particular a compatibilizer and / or a 2025 / 5409 BE2025 / 5409 6 ionomer. The bristle filaments have particularly good performance characteristics when they consist of a polyamide, in particular polyamide 6.12 (PA6.12), polyamide 6.10 (PA6.10), polyamide 10.10 (PA10.10) and / or polyamide 12 (PA12), and / or polybutylene terephthalate (PBT).5 The aforementioned materials, from which the bonding layer and the bristle filaments of the brush's bristle assembly can be made, are also particularly suitable for a material-bonded connection between the bonding layer and the bristle filaments themselves. In one design of the brush, the bristle assembly can comprise several 10 bristle bundles, each consisting of several bristle filaments.The bristle filaments are grouped together here to form bristle bundles, so that the bristle arrangement contains different, separately recognizable bristle bundles.15 The bonding layer can be at least a bonding plate. Such a bonding plate can, for example, be overmolded with a bristle carrier and / or mechanically connected to an existing bristle carrier. The bristle carrier can have bundle receptacles for bristle bundles of the20 bristle arrangement, through which the bonding layer is accessible. The bonding layer can, for example, be arranged or formed in the bundle receptacles. Within the bundle receptacles, the bristle bundles of the bristle arrangement can then be arranged and connected there with the bonding layer and thereby fixed to the bristle carrier.25 In one embodiment of the brush, it is provided that the bonding layer itself has bundle receptacles for bristle bundles.In these bundled structures, the bristle bundles made of bristle filaments of the bristle covering can then be fused and / or welded to the 30 bonding layer in a materially bonded manner. In this 2025 / 5409 BE2025 / 5409 7 connection, it is particularly advantageous if the bonding layer is formed as a bonding platelet. To solve the problem, a method for manufacturing a brush according to one of the claims directed towards such a brush is also proposed, wherein a bristle arrangement made of bristle filaments of the brush 5 is bonded to a bonding layer by fusing and / or fusion for attachment to a bristle carrier of the brush material, wherein the bonding layer is fixed to the bristle carrier of the brush and consists of a different material than the bristle carrier. 10 Here, it is thus provided that the bristle arrangement made of bristle filaments of the brush material is bonded to a bonding layer in order to fix the bristle arrangement to the bristle carrier, wherein the bonding layer is fixed to the bristle carrier of the brush.This method thus enables the anchorless attachment of 15 bristle filaments and / or bristle bundles to bristle carriers, even if the bristle filaments and the bristle carriers are made of materials that are incompatible with each other for a bonded connection by fusion and / or welding. With the help of the bonding layer, which consists of a material suitable for a bonded connection with the bristle filaments, it is possible in a particularly efficient way to fix the bristle filaments of the bristle assembly to the bristle carrier without anchors. In one embodiment of the process, the bonding layer is overmolded with the bristle carrier 25 before the bristle assembly is attached. Thus, the bonding layer is reliably fixed within the bristle carrier as an integral component by overmolding. This can create a form-fit connection and / or a material-fit connection between the bristle carrier and the bonding layer.A positive-locking connection30 between the bonding layer and the bristle carrier can be created by at least 2025 / 5409 BE2025 / 5409 8 an undercut of the bristle carrier created during overmolding. The bonding layer can also be positively connected to the bristle carrier in other ways before the bristle assembly is attached, in particular by being inserted into a receptacle of the bristle carrier, 5 for example by clipping and / or plugging it in. It is also possible to bond the bonding layer to the bristle carrier materially before the bristle assembly is attached. This is possible, for example, by gluing and / or welding, preferably using ultrasound. 10 A bonding plate can be used as the bonding layer. A bonding plate can be easily overmolded with a bristle carrier. The production of the bonding plate and the bristle carrier is possible, for example, using a two-component injection molding process.15 Here, the compound layer can first be injected as a component into a suitable injection mold, and then the bristle carrier can be injection-molded around the compound layer as a second component. It is also possible, in principle, to first inject the bristle carrier and then inject or pour the compound layer into the bristle carrier. 20 In one embodiment of the process, the compound layer is poured and / or dripped and / or injected into a receptacle of the bristle carrier in a flowable form and allowed to cure in the receptacle of the bristle carrier under, in particular, 25 a form-fit and / or material-fit connection with the bristle carrier. At this point, it is mentioned again that the bristle carrier and the bristle assembly and / or the bristle carrier and the compound layer can consist of different materials, in particular different 30 plastics.2025 / 5409 BE2025 / 5409 9 The bonding layer and bristle assembly used in the process shall consist of materials suitable for bonding to one another and preferably of plastics, and may also consist of the same plastic or of plastics of the same plastic family. 5 Preferably a bristle carrier made of polypropylene is used and / or produced in the execution of the process. The compound layer used may consist, for example, of a polyamide, in particular polyamide 6.12 (PA6.12), polyamide 6.10 (PA6.10), polyamide 10.10 (PA10.10) and / or polyamide 1210 (PA12), of copolyester, of polybutylene terephthalate (PBT), polyethylene terephthalate (PET), recycled polyethylene terephthalate (R-PET), polyethylene terephthalate modified with glycol (PETG) and / or of polycyclohexylenedimethyl terephthalate (PCTG) or of a plastic mixture, in particular comprising polyamide, PA6.12, PA6.10, PA10.10 and / or PA12, copolyester, polybutylene terephthalate (PBT), polyethylene terephthalate (PET), recycled polyethylene terephthalate (R-PET), polyethylene terephthalate modified with glycol (PETG) and / or polycyclohexylenedimethyl terephthalate (PCTG) and / or at least one additive, in particular a compatibilizer 20 and / or an ionomer. In one embodiment of the compound layer, it consists, for example, of 47.5%, in particular wt. percent, of polypropylene and 47.5%, in particular wt. percent, of polybutylene terephthalate. Furthermore, the compound layer may contain additives 25 that promote bonding to the material of the bristle carrier and / or the bristle trim by fusion and / or welding. This variant of the compound layer is suitable for material-bonding bonding with a bristle covering, the bristle filaments of which consist of 30 polybutylene terephthalate, and a bristle carrier, which consists of 2025 / 5409 BE2025 / 5409 10 polypropylene.In one embodiment of the bonding layer used, it consists, for example, of 47.5%, in particular wt. percent, of polypropylene and 47.5%, in particular wt. percent, of polyamide. Furthermore, the bonding layer may contain additives that promote bonding to the material of the bristle carrier and / or the bristle head by fusion and / or welding. For example, at least one compatibilizer and / or at least one ionomer and / or at least one phase mediator may be used as an additive in the mixture of which the bonding layer is composed. A suitable compatibilizer is, for example, PP-MAH and / or PP-g-MAH. These additives can promote a material-bonded bond between the compound layer and both the brush body and the bristle filaments of the bristle assembly.15 This variant of the compound layer is suitable for material-bonded bonding with a bristle assembly whose bristle filaments consist of polyamide and a bristle carrier made of polypropylene.The bristle filaments of the bristle trim used can consist of, for example, a polyamide, in particular polyamide 6.12 (PA6.12), polyamide 6.10 (PA6.10), polyamide 10.10 (PA10.10) and / or polyamide 12 (PA12), and / or polybutylene terephthalate (PBT). In a preferred embodiment of the process, the 25 bristle filaments of the bristle assembly are butt-jointed to the bonding layer. For this purpose, the bristle filaments are moved with their fastening ends against a surface of the bonding layer and then fused and / or welded to the bonding layer, thus forming a material bond with the 30 bonding layer. The bristle filaments are not inserted into pre-drilled through-holes in the bonding layer, but are butt-jointed to the bonding layer. In one embodiment of the process, a bristle carrier with bundle receptacles for bristle bundles of the bristle assembly is used.The bonding layer is accessible through the bundle receptacles for the bristle filaments of the bristle bundles. The bristle bundles of the bristle assembly are inserted into the bundle receptacles with the attachment-side ends of their bristle filaments and then bonded to the bonding layer there. In another embodiment of the process, a bonding layer is used which has bundle receptacles for bristle bundles of the bristle assembly, wherein the bristle bundles are inserted into the bundle receptacles of the bonding layer with their attachment-side ends and then bonded to the bonding layer there. In one embodiment of the process, the attachment-side ends of the bristle filaments of the bristle assembly and / or the bonding layer are heated, in particular melted, at least superficially, to bond the bristle assembly to the bonding layer.20 In a preferred embodiment of the process, the bonding layer and the attachment-side ends of the bristle filaments of the bristle assembly are heated, and the attachment-side ends of the bristle filaments are melted, unlike the bonding layer. The bristle filaments and the bonding layer are then joined together, preferably 25 by fusing and / or welding. After the bonding of the bonding layer and the bristle assembly, the bonding layer and / or the bristle assembly, particularly in the area of ​​the attachment-side ends of its bristle filaments, 30 can be cooled to accelerate the curing of the bond between the bristle assembly and the bonding layer. To solve the problem, a brush manufacturing device for the manufacture of brushes, in particular toothbrushes, is also proposed, which has the features of an independent claim directed to such a brush manufacturing device.The 5 brush manufacturing device is configured for carrying out the method according to one of the claims directed thereto. The brush manufacturing device according to the invention comprises a heating device which is configured to heat the fastening-side ends of bristle filaments of a bristle assembly and a bonding layer fixed to a 10 bristle carrier, with which the bristle filaments of the bristle assembly are to be connected, and to melt the fastening-side ends of the bristle filaments, in particular in contrast to the bonding layer. With the brush manufacturing device, the fastening-side 15 ends of the bristle filaments can be melted by heating, while the bonding layer fixed to the bristle carrier is merely heated, but not melted, and therefore remains dimensionally stable. In a preferred embodiment of the 20 brush manufacturing device, the heating device comprises two heating surfaces.Of the two heating surfaces, a first heating surface is provided for heating the attachment-side ends of bristle filaments of a bristle arrangement of a brush to be manufactured, and a second heating surface for heating a bonding layer that is fixed to the bristle carrier of the brush to be manufactured. In this embodiment of the brush manufacturing device, the heating device can be configured by its two heating surfaces to heat the attachment-side ends of the bristle filaments and the bonding layer on the bristle carrier and to melt the attachment-side ends of the bristle filaments in contrast to the bonding layer on the bristle carrier. 2025 / 5409 BE2025 / 5409 13 Preferably the heating device, in particular by means of its two heating surfaces, is designed to heat the fastening-side ends of the bristle filaments and the bonding layer on the bristle carrier to different temperatures.This is advantageous if the bristle filaments and the bonding layer have the same melting temperature and only the attachment ends of the bristle filaments are to be melted. The heating device can, for example, be configured to heat the heating surfaces to different temperatures. In this way, it is possible to heat the attachment ends of the bristle filaments on the one hand and the bonding layer on the bristle carrier of the brush to be manufactured on the other hand to different temperatures and thus carry out the previously described process. The heating device can be configured, in particular, to heat the first heating surface to a temperature sufficient to melt the fastening ends of the bristle filaments. The heating device can also be configured to heat the second heating surface to a temperature sufficient to heat the bonding layer on the bristle carrier to a temperature below its melting temperature.In this way it is ensured that the fastening-side ends of the bristle filaments are melted when using the brush manufacturing device and that the bonding layer on the bristle carrier is heated but not melted and thus remains dimensionally stable and retains its shape.25 In one embodiment of the brush manufacturing device, the distance between the first heating surface and a position specified by the brush manufacturing device, in which the fastening-side ends of the bristle filaments are held ready for heating and melting, is greater than the distance between the second heating surface and a position specified by the brush manufacturing device, in which the bonding layer on the bristle carrier is held ready for heating. With this variant of the brush manufacturing device, it is thus possible to heat both heating surfaces of the heating device to the same temperature.5. The desired, and optionally different, heating of the fastening-side ends of the bristle filaments and the bonding layer on the bristle carrier can be ensured by the different distances between the positions specified by the brush manufacturing device, in which the fastening-side ends of the bristle filaments are held on one side and the bonding layer on the bristle carrier on the other. In a particularly compact design of the brush manufacturing device, it is provided that the two heating surfaces are arranged on a common heating element, in particular on different sides of the common heating element, preferably on opposite sides of the heating element. In this way, the heating element can be positioned between the bristle carrier held on one side and the bonding layer 20 fixed to it, and the fastening-side ends of the bristle filaments held on the other.To carry out the procedure described above, it may be advantageous if the heating device is configured for preferably independent control of the temperature of the two heating surfaces. The heating device may have a control unit and at least one temperature sensor for detecting and controlling the temperature of at least one of the two heating surfaces. Preferably, each heating surface is assigned at least one temperature sensor. In this way, it is possible to detect the temperatures of the two heating surfaces of the heating device independently of each other and to monitor them individually. 2025 / 5409 BE2025 / 5409 15 and, if necessary, to adjust them using the control unit of the brush manufacturing device should a deviation between the actual temperature of the heating surfaces and a setpoint temperature of the heating surfaces be detected. The brush manufacturing device may have a form for receiving and supporting the bristle carrier when connecting the bonding layer on the bristle carrier with the bristle filaments of the bristle assembly.The use of such a shape facilitates the production of brushes with thin-walled bristle carriers. The brush manufacturing device can also include a filament holder for, in particular, clamping the bristle filaments of the bristle assembly. With the aid of the filament holder, it is possible to hold the filaments of the bristle assembly with their fastening ends in the previously mentioned position of the other first heating surface of the heating device in order to heat and ultimately melt the fastening ends of the bristle filaments. The filament holder can also be used to guide the bristle filaments of the bristle assembly during the bonding of the bristle filaments to the bristle assembly. Here, the bristle filaments, in particular via a cleaning side of the bristle assembly, can be axially acted upon with respect to their longitudinal axis and pressed against the heated bonding layer on the bristle carrier.For this purpose, the brush manufacturing device may have a pusher which is configured to press bristle filaments of the bristle assembly with their molten, attachment-side ends against a heated 25 bonding layer on a bristle carrier in order to fix the bristle filaments to the bristle carrier via the bonding layer. The pusher may also be configured to press a bristle carrier with a heated bonding layer attached to it against molten ends of bristle filaments in order to fix the bristle assembly to the bristle carrier. 2025 / 5409 BE2025 / 5409 16 Furthermore, it is advantageous if the filament holder has a hole pattern of receiving holes, preferably designed as through holes, for the bristle filaments and / or bristle bundles of the bristle assembly made of bristle filaments.If the receiving holes of the filament holder are designed as through holes 5, the bristle filaments and / or bristle bundles located in the receiving holes can be pushed out of the receiving holes in an axial movement with respect to their longitudinal axis in order to press the melted fastening-side ends of the bristle filaments against the heated bonding layer on the 10 bristle carrier and to connect the bristle filaments to the bristle carrier via the bonding layer. The filament holder can, for example, be designed as a cassette and / or be transportable between individual stations of the brush manufacturing device.15 The filament holder can also have a clamping mechanism with which the bristle filaments of the bristle assembly can be fixed in the receiving holes of the filament holder. During the heating and melting of the fastening-side ends of the bristle filaments, the clamping mechanism can be closed so that the bristle filaments can be reliably20 held in position within the filament holder.Once the attachment-side ends of the bristle filaments have melted and the bonding layer on the bristle carrier has heated, the clamp of the filament holder can be opened. When the clamp of the filament holder is open, the bristle filaments 25 of the bristle assembly can be pressed with their melted attachment-side ends, for example using the previously mentioned pusher of the brush manufacturing device, against the heated bonding layer on the bristle carrier in order to bond the bristle filaments to the bristle carrier via the bonding layer. 30 To reduce the process time required to create and, above all, to cure the bond 2025 / 5409 BE2025 / 5409 17 between the bristle filaments and the bonding layer on the bristle assembly, it is advantageous if the brush manufacturing device has a cooling device. The cooling device can be set up to cool a connection point between the bonding layer and bristle filaments.The cooling device can, for example, act on the bristle carrier placed therein via the previously mentioned form of the brush manufacturing device. The brush manufacturing device can also include a magazine for receiving a supply of loose bristle filaments. Downstream of the magazine, the brush manufacturing device can include a bundling compartment device, which is configured to extract bristle bundles from the supply of loose bristle filaments contained in the magazine and to make them available for assembling a bristle assembly. The brush manufacturing device can also include a bundling forming unit, which is configured to transform the bristle bundles extracted from the bristle magazine into a desired target shape for the manufacture of the brushes. From the bundling forming unit, the bristle bundles can be transferred to the filament holder already mentioned.By means of filament holders, the bristle bundles can then be held in an arrangement relative to each other, which they will later assume in the bristle arrangement of the brush. 25 The invention is explained in more detail below with reference to an exemplary embodiment. The invention is not limited to the exemplary embodiment shown in the figures. Further exemplary embodiments of the invention result from a combination of the features of individual claims and / or from a combination of the features of the exemplary embodiment shown. 30 Figures 18 show: 2025 / 5409 BE2025 / 5409 18 Fig. 1 a perspective view of a brush according to the invention and designed as a toothbrush, Fig. 2 an exploded view of the brush shown in Fig. 1 to illustrate its components, namely its bristle carrier, its 5 connecting layer and its bristle arrangement made of bristle filaments, Fig.3. A sectional view of the brushes shown in Figures 1 and 2, showing that the bonding layer is positively fixed within the bristle carrier and the bristle assembly 10 is positively connected to the bonding layer and thereby attached to the bristle carrier; Fig. 4. The detail marked with a circle in Figure 3 in an enlarged view, showing in particular an undercut of the bristle carrier 15, through which the bonding layer is positively connected to the bristle carrier; Fig. 5. A perspective view of a device set up for the manufacture of a brush as shown in Figures 1 to 420, wherein the device has a heating device with which the attachment-side ends of bristle filaments of the bristle assembly and the bonding layer are heated, in particular melted. to bond the bristle trim and the connecting laminate together and thereby fix the bristle trim to the 25 bristle carrier of the brush, Fig.6 the device shown in Figure 5, wherein the bristle assembly with the heated, attachment-side ends of its bristle bundles is pressed against the bonding layer 30 for connection with the bonding layer, and the connection point is cooled with a cooling device of the 2025 / 5409 BE2025 / 5409 19 device to accelerate the curing of the material-bonded connection between the bristle assembly and the bonding layer, as well as Figure 7 the device shown in Figures 5 and 6 after removal of the 5 finished brush. Figures 1-4 show a brush designated as a whole by 1, comprising a bristle carrier 2 and a bristle assembly 3 made of bristle filaments 4. 10 Figures 5-7 show the brush 1 at different stages of its manufacture on a brush manufacturing device designated as a whole by 12. 15 The bristle arrangement 3 of the brush 1 is connected to the bristle carrier 2 via a connecting layer 5, which is particularly visible in the exploded view of the brush 1 from Figure 2 and the detailed sectional view from Figure 4.The bonding layer 5 consists of a different material than the bristle carrier 2, which is suitable for a material-bonded connection of the bristle assembly 3 with the bonding layer 5 by fusion and / or welding. Accordingly, the bonding layer 5 and the bristle assembly 3 consist of materials suitable for a material-bonded connection to each other, namely suitable plastics. The bristle assembly 3 of the brush 1 is material-bonded to the bonding layer 5 and then fixed to the bristle carrier 2 via this bonding layer. 30 The bonding layer 5 serves as an aid for fastening the 2025 / 5409 BE2025 / 5409 20 bristle arrangement 3 to the bristle carrier 2, which in turn consists of a material which is selected with regard to its performance characteristics and its function as a handle of the brush 1, but which, due to its material properties, is not suitable for a direct material-bonded connection of the bristle arrangement 3 and its bristle filaments 4 with the 5 bristle carrier 2.The bonding layer 5 and the bristle filaments 4 can, for example, consist of the same material family, in particular the same plastic family, or of the same material, in particular 10 the same plastic. The bristle arrangement 3 is bonded to the bonding layer 5, namely fused and / or welded to the bonding layer 5. 15 In an embodiment of the brush 1 not shown in the figures, the bonding layer 5 is clipped into the bristle carrier 2 and / or welded and / or bonded to the bristle carrier 2, in particular by means of ultrasound. In this context, it can be advantageous 20 if the bonding layer 5 consists of a material that is suitable for a bonded connection with the material of the bristle carrier 2 and for a bonded connection with the material of the bristle filaments 4 of the bristle arrangement 3 of the brush 1.25 The sectional views of the brush 1 from Figures 3 and 4 illustrate that the bonding layer 5 is positively locked and thus mechanically fixed to the bristle carrier 2 by an undercut 6 formed on the bristle carrier 2. The bonding layer 5 reaches its position on the bristle carrier 30 shown in Figures 3 and 4 by injection molding the bristle carrier 2 around the bonding layer 5, which is present as a bonding plate. For this purpose, the material of the bristle carrier 2 is injected into an injection mold containing the bonding layer 5 and then hardens around the bonding layer 5 to form the bristle carrier 2. 5 In another embodiment for the manufacture of the brush 1, it is provided that the compound layer 5 is poured and / or dripped and / or injected in a flowable form into a receptacle of the bristle carrier 2 and then hardens in the receptacle of the bristle carrier 2 under, in particular, a form-fitting and / or material-fitting 10 connection with the bristle carrier 2.As previously indicated, the existing bristle carrier 2 and the bristle assembly 3 and its bristle filaments 4 are made of different plastics. The bristle carrier 2 and the bonding layer 5 are also made of different plastics. In both brushes 1 shown in the figures, the bristle carrier 2 is made of polypropylene. The bonding layer 5 of the brush 1 shown in the figures can, for example, be made of a polyamide or another of the materials mentioned above. The bristle filaments 4 of the bristle assembly 3 are also made of a polyamide or another of the materials mentioned above. The figures further show that the bristle arrangement 3 of the brush 1 comprises several bristle bundles 7, each composed of several bristle filaments 425. The connecting layer 5 in the illustrated embodiment of the brush 1 is formed by a connecting plate. In principle, it is also conceivable to use several connecting plates as the connecting layer 5 of such a brush 1.The use of a single connecting plate as the 30 connecting layer 5 is particularly advantageous for the simple and economical manufacturing of the brush 1. The bristle carrier 2 has bundle receptacles 8 for bristle bundles 7 of the bristle arrangement 3 of the brush 1. Through the bundle receptacles 8, the underlying connecting layer 5 for attaching the bristle bundles 5 7 of the bristle arrangement 3 is accessible for the bristle filaments 4 of the bristle bundles 7. In the bundle receptacles 8, the bristle bundles 7 of the bristle arrangement 3 are arranged and connected to the connecting layer 5. 10 In an embodiment of the brush 1 not shown in the figures, a bonding layer 5 is used, preferably in the form of a bonding plate, which in turn has bundle receptacles. In these bundle receptacles of the bonding layer 5, the bristle bundles 7 of the bristle arrangement 3 are arranged and are there bonded to the 15 bonding layer 5 by means of a material bond, namely fused and / or welded.To manufacture the brush 1 shown in the figures, the bristle arrangement 3, consisting of bristle filaments 4, is bonded to the 20 bonding layer 5 in order to attach the bristle arrangement 3 to the bristle carrier 2 of the brush 1 via this bonding layer 5. The bonding layer 5 is itself already fixed to the bristle carrier 2 of the brush 1 before the bristle filaments 4 of the bristle arrangement 3 are bonded to the bonding layer 5. The bonding layer 5 used is made of a different material than the bristle carrier 2. As the figures show, the bristle carrier 2 has a head-side fastening section 9 to which the bonding layer 5 is fixed. 30 Furthermore, the bristle carrier 2 also includes a handle section 10, which together with the fastening section 9 forms a materially homogeneous, monolithic unit, i.e., is integrally connected with the fastening section 9.As Figure 2 illustrates, the bristle carrier 2 with its 5 attachment section 9 and its handle section 10, the bonding layer 5, and the bristle filaments 4 are initially separate components of the brush 1, which are joined together during the manufacture of the brush 1 in the manner described above. Figures 3 and 4 show that the bonding layer 5 was overmolded with the bristle carrier 2 before the bristle assembly 3 was attached to the bonding layer 5. Thus, the bonding layer 5 is a part integrated into the bristle carrier 2, made of a different material than the bristle carrier 2, and serves to fix the bristle assembly 3 to the 15 bristle carrier 2 without an anchor-free connection between the bristle assembly 3 and the bristle carrier 2. In particular, Figure 4 illustrates that the bonding layer 5 was positively connected to the bristle carrier 2 before the bristle trim 3 was attached.In the present embodiment, this is achieved by injecting the bristle carrier 2 around the previously produced compound layer 5 in a two-component injection molding process. In another embodiment of the method for manufacturing the brush 1, the compound layer 5 is to be inserted into a receptacle of the bristle carrier 2, for example by clipping and / or plugging it in, and thereby connecting the compound layer 5 to the bristle carrier 2. It is also possible to bond the compound layer 5 to the bristle carrier 2 by means of a material bond, for example by gluing the compound layer 5 to the bristle carrier 2 and / or, preferably by means of ultrasound, by welding it. 5. To produce the brush shown in the figures, a bonding layer in the form of a bonding plate is used, which is particularly easy to see in Figure 2.In another embodiment for manufacturing the brush 1, the 10 compound layer 5 is first poured and / or dripped and / or injected into a receptacle of the bristle carrier 2 in a flowable form and then hardens in the receptacle of the bristle carrier 2, forming a bond with the bristle carrier 2, in particular a form-fit and / or material-fit bond. 15 For manufacturing the brush 1, a bristle carrier 2 with bundle receptacles 8 for bristle bundles 7 of the bristle arrangement 3 is used. As mentioned above, the bristle bundles 7 consist of the bristle filaments 4 of the bristle arrangement 3. The compound layer 20 5 is arranged within the bristle carrier 2 such that the compound layer 5 is accessible through the bundle receptacles 8 in the bristle carrier 2 and the bristle bundles 7 of the bristle arrangement 3 are then connected with The fastening-side ends 11 of their bristle filaments 4 can be inserted into the bundle receptacles 8 and then connected to the 25 connecting layer 5.As already indicated, in one embodiment of the method for manufacturing a brush 1, a bonding layer 5 can also be used, which in turn has bundle receptacles for bristle bundles 730 of the bristle arrangement 3. The bristle bundles 7 can then be inserted into the bundle receptacles of the bonding layer 5 with their attachment-side ends 11 and subsequently bonded to the bonding layer 5. In this context, it is advantageous if the bonding layer 5 is in the form of a bonding plate. 5 To bond the bristle arrangement 3 to the bonding layer 5, the attachment-side ends 11 of the bristle filaments 4 of the bristle arrangement 3 and the bonding layer 5 are heated. In doing so, the attachment-side ends 11 of the bristle filaments 4 of the bristle arrangement 3 are melted and the bonding layer 5 at least superficially warmed.In contrast to the bonding layer 5, the fastening-side ends 11 of the bristle filaments 4 of the bristle assembly 3 are heated so that 15 the fastening-side ends 11 of the bristle filaments 4 are melted. Subsequently, the bristle filaments 4 and the bonding layer 5 are connected to each other via the fastening-side ends 11 of the bristle filaments 4. 20 The bonding layer 5 and the bristle assembly 3 are cooled after bonding, particularly in the area of ​​the fastening-side ends 11 of the bristle filaments 4 of the bristle assembly 3. This is shown in Figure 6.