DE102012101135A1 - Fiber material part and method for its production - Google Patents

Abstract

The invention relates to a fiber material part (10) and a method and a device (26) for its production. The fiber material part (10) is constructed in several parts or in several layers. It has at least one core part (12) and at least one hollow fiber part (13) connected to the core part (12). The core part (12) is made of textile fibers (15) in which they are compressed or bonded into a nonwoven fabric (14). The fleece (14) serves as a carrier for the hollow fiber part (13). The hollow fibers (18) of a hollow fiber layer (13) are produced by a melt-blown or spunbonding or extrusion process and may be spun together. Each hollow fiber (18) includes a cavity (19). By entangling a plurality of such hollow fibers (18) to form a hollow fiber part (13), a good thermal and acoustic insulation effect is achieved.

Description

The present invention relates to a fiber material part and a method for its production. The fiber material part is constructed in several parts and / or multi-layered and serves, for example, as insulating material for buildings.

Such insulation materials are known. Often mineral wool, such as rock wool or glass wool in the form of mats is used for insulation. For facades are often plastic plate parts, such as polystyrene panels used for thermal insulation.

It may be considered an object of the present invention to provide a fibrous material member which provides improved thermal and / or acoustic insulation.

This object is achieved by a fiber material part having the features of claim 1 and a method for its production with the features of claim 16.

The multi-part and / or multi-layer fiber material part according to the invention has at least one core part and at least one hollow fiber part, which are preferably connected directly to one another. One or more core parts may each form a core layer. One or more hollow fiber parts can each form a hollow fiber layer. The core part is made of a non-woven, which is formed from interconnected textile fibers, which are executed in particular solid without enclosed cavities.

The hollow fiber part has a multiplicity of hollow fibers. Each hollow fiber defines at least one cavity or includes at least one cavity. The cavity may be filled with a liquid or with gas, for example with air. Alternatively, there may be a vacuum in the cavity. The cavity may be completely closed or at least open at the ends of the hollow fiber. The hollow fiber part has particularly good thermal insulation properties. Due to the enclosed cavity, the heat is passed through the hollow fiber or through the hollow fiber part only very bad. It is therefore possible to achieve a very effective thermal insulation already with relatively thin hollow fiber parts or hollow fiber layers. This simplifies, for example, the subsequent insulation of buildings significantly. The thinner the heat insulation to be applied to the building, the easier and less expensive the insulation of the building. In addition, the space required is reduced, which is particularly important if the insulation is to be mounted inside a building. In the case of insulation on the facade of a building, the conversion effort on roof projections, window revealings, gutters etc. can be reduced by the very thin fiber material parts. As a hollow fiber, e.g. to serve a polymer fiber.

In addition to the thermal insulation effect and a very good acoustic insulation effect is achieved. In the hollow fiber part, the sound waves are broken at many interfaces. These interfaces are formed by density jumps between adjacent materials or media. In the case of the hollow fiber part, the hollow fibers are surrounded by air on the outside. This is adjacent to the material of the hollow fiber, which can also be constructed in a multi-layered way. To the cavity in the hollow fiber, another interface between the material of the hollow fiber and the medium or vacuum is formed in cavity. Oblique incident sound waves are refracted at each boundary layer so that only a part of them is reflected. Preferably, the hollow fibers comprise or are made of material having a low acoustic velocity of sound, e.g. Elastomer, wherein the speed of sound is preferably less than 150 or less than 100 meters per second. Due to the refraction and / or partial reflection, waves can be superimposed and at least partially extinguished. Ideally, the sound waves propagate within the fiber material part. In addition, the hollow fibers as well as the textile fibers of the core part are moved by the acoustic waves, whereby part of the acoustic energy is converted by friction into heat. The number of hollow fibers is to improve the acoustic insulation as large as possible, since thereby the number of density jumps, ie the transition of materials of different density and with different speed of sound, increases in the fiber material part and the soundproofing is improved.

It is advantageous if the hollow fibers have an outer surface with a plurality of circumferentially distributed around the hollow fiber arranged projections. For example, the hollow fiber may have a star-shaped in cross-section contour. In such an embodiment, gaps are formed between the hollow fibers of the hollow fiber part, which contribute to the reduction of heat conduction and thus to improve the thermal insulation. The projections may extend in the direction of the fiber along the entire hollow fiber. In addition, sound waves between two adjacent projections can be repeatedly broken and partially reflected in order to improve the sound insulation.

Preferably, the hollow fibers or the at least one hollow fiber part in a spunbonding or a Meltblown process produced. By carrying out the respective method in a corresponding gas atmosphere or in vacuum, the cavity of the hollow fiber can be easily filled with the desired gas or contain a vacuum.

To connect the hollow fibers of a hollow fiber part with each other, they could be spun together, so that a better cohesion of the hollow fibers of the hollow fiber part is ensured. For example, the hollow fiber part can be produced by extruding the hollow fibers and then spinning the hollow fibers. The hollow fibers may alternatively or additionally be bonded together in a material-locking manner.

The fiber density of the hollow fiber part is smaller than the fiber density of the core part in a preferred embodiment. By fiber density is meant the mass of the part concerned divided by the volume of the part. If more than one hollow fiber part is provided, the fiber density of the hollow fiber parts may be the same or different. If more than one core part is provided, the fiber density of the core parts may be the same or different. A small fiber density in the hollow fiber part can further improve the thermal insulation, since the proportion of liquid, gas or vacuum is large. It depends in particular on the proportion of the volume in the cavities of the hollow fibers, as regardless of whether these cavities are closed at the ends of the hollow fiber or not, the gas or air in the hollow fibers does not move, so that even with open Cavities a heat convection is avoided. On the other hand, an effective barrier layer, for example, against the penetration of moisture or as a fire protection layer can be achieved.

The hollow fibers of at least one hollow fiber part may have a coating or impregnation. The coating or impregnation may be applied directly to the extruded or melt-blown hollow fibers and / or to the hollow fibers assembled into a hollow fiber part. The coating or impregnation may be flame-retardant, so that the fiber material part can simultaneously serve as fire protection. A coating or impregnation may also serve to prevent fungi or the ingress of moisture. It is also possible that the hollow fiber part comprises hollow fibers made of different materials and / or with different coatings and / or with different impregnations, so that several of the above-mentioned effects or protective effects can be achieved.

In the production of hollow fibers in the spunbonding process, the impregnation or coating can be produced either subsequently or else by the so-called bi-component technology or multicomponent technology already during the extrusion of the fibers.

It is also possible, alternatively or in addition to the hollow fibers of the hollow fiber part, to provide the textile fibers of the core part with an impregnation or coating.

In one embodiment, the fiber material part has a core part that forms a continuous core layer. At least one hollow fiber part is arranged on one or both sides, which can form, for example, a hollow fiber layer. As a result, a two-, three- or multilayer structure of the fiber material part can be achieved. In particular, if at least the hollow fibers of a hollow fiber layer protect against the ingress of moisture, additional vapor barriers or the like between the core layer and the hollow fiber layer or the hollow fiber layers can be dispensed with.

It is also possible that the fibers of the core part formed by the fleece are made as hollow fibers.

At least part of the textile fibers of the core part and / or the hollow fibers of the hollow fiber part may contain a plastic having a hot-melt adhesive property. To connect the textile fibers of the core part or the hollow fibers of the hollow fiber part of the plastic can be preferably activated without the supply of other binders to connect the fibers of the relevant part and hold together.

It is also possible that the core part is connected to the adjoining at least one hollow fiber part by solidification and / or by material bonding. This connection can for example be made by solidification of the parts by means of needles or by means of a disembodied fluid, such as water jets. Alternatively or additionally, the parts may be materially connected to one another, for example with the aid of a binder or adhesive. The parts can also be bonded together by lamination.

To produce the fiber material part, a nonwoven fabric is made from a random fiber web of textile fibers, which constitutes the core part of the fiber material. On this core part is arranged on one side or on both sides in each case at least one hollow fiber part of a plurality of hollow fibers. Subsequently, the hollow fiber part or the hollow fiber parts is connected to the core part. Such a manufacturing process is extremely flexible. Depending on the application can be different Materials or plastics are used to produce the hollow fibers. Accordingly, the textile material used for the production of the core part can be adapted to the application. The procedure does not change as a result.

Advantageous embodiments of the invention will become apparent from the dependent claims and the description. The drawing is to be used as a supplement. Embodiments of the invention will be explained in more detail with reference to the accompanying drawings. Show it:

1 to 4 in each case an exemplary embodiment of a fiber material part in a schematic basic representation,

5 to 7 each a schematic representation of an embodiment of a hollow fiber for the hollow fiber part of the fiber material part,

8th an embodiment of a hollow fiber in a schematic cross-sectional view,

9 1 is a schematic block diagram similar representation of an embodiment of a method or a system for producing the fiber material part,

10 an alternative production possibility of the hollow fibers and / or the textile fibers in the spunbonding process for the plant or the method according to 9 and

11 a schematic representation of an embodiment of a spinneret for in 10 illustrated method.

The invention relates to a fiber material part 10 , which is used for example as Dämmmaterialteil for building insulation. The fiber material part 10 consists of several fiber or filament parts 11 , It has at least one core part 12 and at least one with the core part 12 connected hollow fiber part 13 on. In the embodiments according to 1 to 3 is a core part 12 provided, which forms a continuous core layer. In a modification to the illustrated embodiments, it could also be several core parts 12 or core layers.

On us, for example, on both sides of the core part 12 or the core layer are in the embodiments according to the 1 to 3 one or more hollow fiber parts, respectively 13 arranged. In the first and third embodiments ( 1 and 3 ) forms each hollow fiber part 13 a hollow fiber layer, which is the core part 12 covering area on the assigned side. The number of layers thus formed may vary. There may be two, three or more layers alternately of a core layer and a hollow fiber layer. The contact or interface between a hollow fiber part 13 or a hollow fiber layer and the adjacent core part 12 or the adjacent core layer can extend in one plane ( 1 ) or uneven, for example curved, wavy, stepped, jagged or run in any other form ( 2 and 3 ). It is also possible in a core part 12 Wells or recesses provide, in which then each a hollow fiber part 13 is arranged ( 2 ). According to the second embodiment 2 These recesses are semi-cylindrical or hemispherical, although other shapes can be selected.

According to the fourth embodiment 4 are cubic or cuboid core parts 12 and hollow fiber parts 13 in a layer or layer alternately next to each other, for example in the manner of a checkerboard pattern. Several such layers can be arranged one above the other to form a fiber material part. Preferably, the hollow fiber parts border 13 always flat on core parts 12 and vice versa.

The core part 12 is through a fleece 14 made of interconnected textile fibers 15 educated. As a textile fiber 15 For example, natural fibers and / or synthetic fibers may be used. It is also possible to combine natural and synthetic fibers into a fiber mixture and from this the fleece 14 manufacture. The textile fibers 15 for the core part 12 may also contain mineral fibers, such as stone fibers or glass fibers, or the fleece 14 can be made entirely of such fibers. The textile fibers are preferably made solid without internal cavities or chambers. The textile fibers 15 of the core part 12 Hollow fibers can also be formed at least partially by hollow fibers.

The core part 12 also serves as a carrier for the at least one hollow fiber part 13 , Each hollow fiber part 13 has a variety of hollow fibers 18 on. The hollow fibers 18 are preferably made of plastic, for example in a melt-blowing process or by extrusion. A hollow fiber part 13 can hollow fibers 18 made of different plastics. Additionally or alternatively, it is also possible that each hollow fiber part 13 hollow fibers 18 made of different plastic material. As a result, for example, one of the building wall or the building ceiling associated hollow fiber part 13 be made of other material, as a wall or the ceiling facing away hollow fiber part 13 ,

Every hollow fiber 18 has at least one cavity 19 open to the environment ( 6 ) or completely closed ( 5 ). The hollow fibers 18 are initially produced endlessly and by the spinning process or the meltblown process at both longitudinal ends 20 open. It is possible in the cavity 19 to permanently provide a liquid, gas or vacuum and the hollow fibers 18 at certain intervals, at least at both longitudinal ends 20 to close. Also several axially adjacent and in particular closed against each other cavities 19 can do this in a hollow fiber 18 to be available ( 7 ).

The hollow fiber 18 has a tube-like shape. The cavity 19 can in preferred embodiments completely in the fiber direction of the hollow fiber 18 along the entire hollow fiber 18 extend ( 5 and 6 ). Also several, axially adjacent to each other along the entire hollow fiber 18 existing completely closed cavities 19 can be provided ( 7 ). The least one cavity 19 may be filled with liquid, air or other gas. It is possible to specify a desired pressure. Alternatively, in at least one cavity 19 also a vacuum prevail. Through this cavity 19 is the heat conduction transverse to the fiber direction of the hollow fiber 18 low. A hollow fiber part 13 made of open and / or closed hollow fibers 18 has a very good insulation effect.

• – zwischen der Umgebungsluft und dem Material der Hohlfaser 18,
• – zwischen dem Material der Hohlfaser 18 und dem Medium (Flüssigkeit, Gas, Vakuum) im Hohlraum 19,

jeweils in beide Richtungen, wenn eine Schallwelle auf eine Hohlfaser 18 auftrifft.Moreover, in the hollow fiber part 13 formed many interfaces at which materials or media of different density and / or with different velocities of sound adjoin one another. Sound waves are refracted when hitting these interfaces and only partially reflected. As a result, a good sound insulation is achieved in addition to the thermal insulation. These interfaces are in the hollow fiber part 13 formed at the transition

• - Between the ambient air and the material of the hollow fiber 18 .
• Between the material of the hollow fiber 18 and the medium (liquid, gas, vacuum) in the cavity 19 .

each in both directions when a sound wave hits a hollow fiber 18 incident.

The the cavity 19 remote outer surface 21 the hollow fiber 18 can be made flat except for the roughness of the plastic material used. In the preferred embodiment, the outer surface is 21 the hollow fiber 18 unevenly executed. The outer surface 21 has in the circumferential direction U relative to the fiber extension direction a plurality of projections 22 on. Viewed in the circumferential direction U, the projections taper 22 in a radial radial direction R radially outward. Viewed in cross section, the projections 22 a triangular shape. The projections 22 are arranged in the circumferential direction U preferably distributed regularly. The hollow fiber 18 obtained thereby in cross-section a star-shaped contour ( 8th ). The cross section of the hollow fiber 18 is constant in the direction of the fiber along the entire hollow fiber. Only at the two longitudinal ends 20 and optionally other locations where a cavity 19 is closed, the cross-sectional shape of the hollow fiber changes 18 ,

Through the uneven outer surface 21 and the protrusions extending in the direction of fiber flow 22 be in the hollow fiber part 13 due to the multiplicity of hollow fibers entangled with each other 18 also between the hollow fibers 18 air-filled interstices formed that the heat conduction between the hollow fibers 18 reduce. As a result, the insulating effect of the hollow fiber part 13 and hence the fiber material part 10 further improved.

Through the projections 22 or the uneven outer surface 21 the hollow fiber 18 For example, sound waves may be diffuse partially reflected and / or between adjacent protrusions 22 be partially reflected and broken several times, whereby the sound insulation is improved.

At least the hollow fibers 18 a hollow fiber part 13 can be a coating or an impregnation 25 have in the 5 and 6 is illustrated only extremely schematically. Impregnating the hollow fibers 18 can provide improved protection against damage to the building and / or the fiber material part 10 cause. For example, the impregnation 25 against moisture and / or fungus formation and / or flame retardant act. The impregnation 25 can directly on the hollow fibers 18 be applied. Alternatively, it is also possible to have a coating and / or impregnation 25 on a manufactured hollow fiber part 13 applied. When impregnating the hollow fibers 18 is, however, the penetration of the hollow fiber part 13 and thus improves the protective effect.

A device 26 for producing the fiber material part 10 is extremely schematic in 9 illustrated. The manufacturing process is based on 9 explained below.

For the production of the fleece 14 becomes from the textile fibers 15 First, a loose Wirrfasergelege 27 generated. This Wirrfasergelege 27 is then, for example, by a solidification device 28 to a fleece 14 solidified. The solidification device 28 can the textile fibers 15 of the random fiber fabric 27 for example, with the help of needles or as in the embodiment by means of Fluid jets and in particular jets of water 29 solidify. Alternatively or in addition to the solidification by means of the solidification device 28 can the textile fibers 15 also be connected to one another cohesively. For example, this may be a binder on the textile fibers 15 be applied, in particular by spraying a fludischer binder. Additionally or alternatively, it is also possible, at least a portion of the textile fibers 15 to be provided with a plastic or made of a plastic having hot melt adhesive properties. These hot melt adhesive properties can be activated by radiation or heat, whereby a cohesive connection is achieved. At the in 9 illustrated exemplary embodiment, the production of the nonwoven takes place 14 without additional binders only by solidification of the random fiber fabric 27 , The fleece 14 is therefore binder-free. Finally, there is another way to connect the textile fibers 15 in that they are spun together.

For producing a hollow fiber part 13 , For example, according to a hollow fiber layer, is used in the embodiment, a melt blowing device 33 , Each melt blown device 33 has a melting device 34 for producing a melt S, which in the liquid or viscous state of a chamber 35 a spinner 36 is supplied. In a peripheral wall, the chamber 35 surrounds a ring, a plurality of outlet openings are provided. When turning the spinner 36 about an axis of rotation D, the melt S is pushed out of the outlet openings in the peripheral wall or promoted. The outlet openings are annular, so that hollow fibers 18 be formed - similar to how this is done in the extrusion of tubular plastic parts. In the circumferential direction around the spinner 36 is distributed through blower units 37 a gas stream, for example an air stream, into which the hollow fibers emerging from the outlet openings are formed 18 penetrate and this entrains in the flow direction and, for example, on a conveyor belt 40 or another storage surface stores. The hollow fibers 18 can be impregnated within the gas stream or after being deposited.

At the in 9 illustrated embodiment is for the production of each hollow fiber part 13 each a meltblown device 33 available. First, one of the two melt blowing devices 33 the hollow fibers 18 for a hollow fiber part 13 manufactured and on the conveyor belt 40 stored. The manufactured fleece 14 gets onto this first layer of hollow fibers 18 hung up. Following this is on the fleece 14 another layer of hollow fibers 18 over the other melt blowing device 33 hung up. These three superimposed layers or layers are in the embodiment by means of the conveyor belt 40 a connection device 41 fed.

The connection direction 41 serves to the respective situation of hollow fibers 18 to form the respective hollow fiber layer 13 with the fleece 14 connect to. For this purpose, the connection device 41 the hollow fibers 18 with the aid of a binder by gluing and / or lamination with the fleece 14 connect. Alternatively or additionally, the connecting device 41 also have solidifying agents to the hollow fibers 18 on the fleece 14 to fix. As solidifying agents needles or fluid jets, in particular water jets can be used, as in connection with the solidification device 28 was explained.

The connection device 41 may alternatively or additionally by a shape or disembodied radiation, such as heat radiation, infrared radiation, UV radiation or the like, activate a hot melt adhesive property of a plastic. A plastic having a hot melt adhesive property may be at least part of the hollow fibers 18 to be available. In this way, a compound of the hollow fibers 18 with each other or the hollow fibers 18 with the fleece 14 be achieved.

The connection device 41 may alternatively or additionally comprise pressure generating means comprising the hollow fibers 18 and the fleece 14 press or press each other. As a result, in particular in the two hollow fiber parts 13 or hollow fiber layers, a desired fiber density can be achieved. In the preferred embodiment, the fiber density is in the hollow fiber part 13 smaller than the fiber density in the core part 12 , Below the fiber density is the mass of the part concerned 12 . 13 divided by the volume of the part 12 . 13 to understand.

The connection device 41 For example, it is also possible to use one or more calendering rollers for setting a specific thickness of the fiber material part 10 contain.

At the in 9 illustrated embodiment is via the connecting device 41 at the same time a compound of the respective hollow fibers 18 a common hollow fiber part 13 produced among each other. In modification to the basis of 9 explained methods, the hollow fibers 18 also before the connection with the fleece 14 for forming a hollow fiber part 13 solidified with each other and / or materially connected. It is also possible to use the hollow fibers 18 a hollow fiber part 13 to spin together. In this case, the connection device serves 41 only to the supplied parts 12 . 13 to connect with each other.

The fiber material part produced in this way 10 can finally be cut to the desired size. For this purpose, the device 26 a cutting means, which in 9 not shown.

In modification to the in 9 illustrated embodiment, the solidification device 28 also part of the connection device 41 be.

10 shows another possibility for the production of textile fibers 15 and / or the hollow fibers 18 that at the device 26 instead of the melt blowing devices 33 can be used. The fibers 15 . 18 can also be spunbonded by a blast nozzle arrangement 44 with several juxtaposed nozzles 45 getting produced. The melt S is via an opening 46 introduced into a hot air stream H and at the nozzle exit 47 the tuyere 45 the fiber is created 15 respectively. 18 , by means of the hot air flow H on a storage surface, such as the conveyor belt 40 is filed. The tuyeres 45 are transverse to the transport direction of the conveyor belt 40 arranged side by side. When extruding the melt S, coated or impregnated fibers may also be used by a multicomponent process 15 . 18 getting produced. This can be the fibers 15 . 18 be assigned by the coating or impregnation a hot melt adhesive property or other desired property.

11 shows a modified embodiment of a blowing nozzle 45 , which can also be used. The tuyere after 11 has several openings 46 on, side by side at the nozzle exit 47 are arranged. By way of example, the cross sections of the openings 46 unequal size, resulting in different strong fibers 15 respectively. 18 be generated. The openings 46 are not aligned parallel to each other, but towards a central axis, so that the fibers 15 . 18 can come in contact with each other in the hot air flow and connect.

The invention relates to a fiber material part 10 as well as a method and a device 26 for its production. The fiber material part 10 is constructed in several parts or multi-layered. It has at least one core part 12 or a core layer and at least one with the core part 12 or the core layer 12 connected hollow fiber part 13 on, that is a hollow fiber layer 13 can form. The core part 12 is made of textile fibers 15 manufactured, in which this to a fleece 14 compressed or connected. The fleece 14 serves as a carrier material for the at least one hollow fiber part 13 , The hollow fibers 18 a hollow fiber part 13 are made by a melt-blowing process or spunbonding process or extrusion process and may be spun together. Every hollow fiber 18 closes a cavity 19 one. By devouring a large number of such hollow fibers 18 in the hollow fiber part 13 is achieved a good thermal and acoustic insulation effect.

LIST OF REFERENCE NUMBERS

10

 Fiber material part

11

 Fiber and / or filament part

12

 core part

13

 Hollow fiber section

14

 fleece

15

 textile fiber

18

 hollow fiber

19

 cavity

20

 Longitudinal end of the hollow fiber

21

 Outer surface of the hollow fiber

22

 head Start

25

 impregnation

26

 contraption

27

 Random fiber scrim

28

 solidifying device

29

 waterjet

33

 melt blowing

34

 melting device

35

 chamber

36

 spinner

37

 blower unit

40

 conveyor belt

41

 connecting device

44

 blast nozzle

45

 blow nozzle

46

 opening

47

 nozzle exit

D

 axis of rotation

R

 radial direction

S

 melt

U

 circumferentially

Claims (16)

Multilayer fibrous material part ( 10 ), in particular for use as an insulating material, with at least one hollow fiber part ( 13 ), which has a multiplicity of hollow fibers ( 18 ), each hollow fiber ( 18 ) a cavity ( 19 ), and with at least one core part ( 12 ) made of a fleece ( 14 ) of interconnected textile fibers ( 15 ) is formed. Fiber material part ( 10 ) according to claim 1, characterized in that the cavity ( 19 ) of the hollow fibers ( 18 ) is filled with a liquid or a gas or that in the cavity ( 19 ) of the hollow fibers ( 18 ) a vacuum prevails. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the hollow fibers ( 18 ) an outer surface ( 21 ) with several in the circumferential direction (U) around the hollow fiber ( 18 ) distributed projections ( 22 ) having. Fiber material part ( 10 ) according to claim 3, characterized in that the projections ( 22 ) in the direction of the fiber along the entire hollow fiber ( 18 ). Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the hollow fiber part ( 13 ) is produced by a melt-blowing process. Fiber material part ( 10 ) according to one of claims 1 to 4, characterized in that the hollow fibers ( 18 ) of the hollow fiber part ( 13 ) are spun. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the fiber density of the hollow fiber part ( 13 ) is smaller than the fiber density of the core part ( 12 ). Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the hollow fibers ( 18 ) and / or the hollow fiber part ( 13 ) have or have an impregnation. Fiber material part ( 10 ) according to any one of the preceding claims, characterized in that each hollow fiber part ( 13 ) directly to a core part ( 12 ) Fiber material part ( 10 ) according to one of the preceding claims, characterized in that at least one core part ( 12 ) and / or at least one hollow fiber part ( 13 ) forms a layer. Fiber material part ( 10 ) according to claim 10, characterized in that the boundary surface of this layer can run in a plane or uneven. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the textile fibers ( 15 ) of the core part ( 12 ) are hydroentangled or needled or spun. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that at least a part of the textile fibers ( 15 ) of the core part ( 12 ) and / or the hollow fibers ( 18 ) of the hollow fiber part ( 13 ) are cohesively connected to each other. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that at least a part of the textile fibers ( 15 ) of the core part ( 12 ) and / or the hollow fibers ( 18 ) of the hollow fiber part ( 13 ) contains a plastic with a melt adhesive property. Fiber material part ( 10 ) according to one of the preceding claims, characterized in that the core part ( 12 ) and the hollow fiber part ( 13 ) are bonded together by solidification and / or cohesive. Method for producing a fiber material part ( 10 ), comprising the following steps: - Providing a random fiber laminate ( 27 ) of textile fibers ( 15 ), - connecting and / or solidifying the random fiber fabric ( 27 ) for forming a nonwoven ( 14 ), - producing at least one core part ( 12 ) from the fleece ( 14 ), - arranging at least one hollow fiber part ( 13 ) of a plurality of hollow fibers ( 18 ) on the at least one core part ( 12 ), - connecting the at least one hollow fiber part ( 13 ) with the at least one core part ( 12 ).

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