JP2005188138A - Method for manufacturing artificial turf structure, and artificial turf structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an artificial turf surface with stable quality by enabling a filler for keeping a fiber composition almost perpendicular to be dispersed and retained in a manufacturing process. <P>SOLUTION: The artificial turf surface, for example, for sporting activities is made by starting from a substrate (1) with a plurality of fibrous compositions (2) which are elongated upward in such a manner as to imitate a natural grass cover or turf; and an end (2a) close to the substrate (1), and an end (2b) away from the substrate (1) are each provided in the fibrous composition (2). The end (2b) is subjected to curling such that the fibrous compositions (2) are wholly formed in a standing timber shape. The artificial turf surface can be made as a form of a final product in an industrial manufacturing process, which includes a granular filler or the filler (3) held on the substrate (1), by using the curled end (2b) of the fibrous composition (2). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is an artificial turf structure of the type comprising a substrate comprising a plurality of fiber compositions extending upwardly from the substrate itself, as if viewed as a natural-grass cover or natural turf. (Synthetic-grass structure).

  Artificial turf structures of the type described above are granulated designed to keep the fiber composition itself in a nearly vertical position between itself as a product and between the fiber compositions seen as if they were natural grass covers. It can be used as a structure in which various filler materials are dispersed.

  Such a solution is described in Patent Document 1 and Patent Document 2, for example. In particular, in the solution described in US Pat. No. 6,057,059, the granular filling material or infill is made of a collection of substantially homogeneous granular plastic materials.

  Artificial turf structures that have been conceived so far (even if these solutions do not plan to use fillers (fillers), in particular, they will use fillers as described above) However, there is a growing expectation that it will be an effective replacement for natural grass cover. This is due in particular to the application point of view that there are significant problems in maintaining natural turf in good condition for various reasons (environmental conditions, harsh use, etc.) and the maintenance costs associated with it. doing. For example, it is known to use a lawn structure of the type described above to create a sports arena such as a soccer field, a five-player football field, an American football field, or a tennis court. The use of this type of turf structure is also found in making athletics tracks.

  In order to create and lay a synthetic-grass flooring of the type described above with some degree of accuracy, but largely in reality, at least three basic factors must be taken into account.

  First, the artificial turf should have an appearance that is as close as possible to that of the natural grass cover or natural turf. In other words, it is to prevent the feature of the artificial turf cover from appearing excessively. For this reason, after the artificial turf surface has been laid, it is often treated by brushing with the intention of making the fiber composition of the substrate into fibers and disjoint so that the artificial turf is as similar as possible to the leaves of natural grass. ing. From the same point of view, a solution to make artificial turf using a fiber composition is proposed to handle curling or texturing (in terms currently used in the textile industry). Is actually adopted. However, this solution raised two difficulties. For one thing, there have been many difficulties from a technical point of view to actually make a sheet substrate with a plurality of fiber compositions extending from the substrate using curled or textured fibers. Second, this type of substrate cannot be used in combination with fillers. This is because it is very difficult and practically impossible to “seew” (disperse) the filler in the dense network formed by the curled or textured fiber composition. .

  The second factor to consider is related to the wear of the artificial turf during use. In fact, the artificial turf surface does not have a regeneration mechanism like a natural grass cover, and therefore the artificial turf surface tends to have wear that is far from being uniform due to different use conditions and strains at different locations on the artificial turf surface. An example that can be easily understood is that in the case of a surface for soccer competitions, there is a tendency to be exposed to great pressure in the center of the pitch and the area around the goal, such as the area near the corner of the pitch or the area immediately next to the goal. More significant wear occurs compared to other areas. In the case of an artificial turf cover in which a filler is used, it is necessary to take into account that the filler is ejected from the place where the filler is disposed, depending on the form of pressure applied. A typical example is a player who wears shoes with studs or spikes and uses the studs or spikes to exert a strong forward force or make a sudden stop. Usually, the fiber composition of the turf cover does not provide a suitable tethering effect when such a large pressure is applied to the filler.

Finally, the third factor to consider is directly related to laying artificial turf surfaces. In particular, when the use of a filler is planned for the artificial turf surface, in the current practice, a sheet substrate having a fiber composition imitating natural turf is first laid, and then the granular filler is applied to the cover. Sowing ".
US Pat. No. 5,958,527 European Patent Publication No. 1,158,099

  The above-described “seeding” of the filler material carried out “in the field” naturally encounters various difficult factors. To give some straightforward examples, when “seeding” a filler, usually first, the fiber composition is regulated so that the fiber composition is oriented substantially vertically when the filler is dispersed. It is preferable. The purpose is to allow the granular material to be stacked in stages starting from the lowest level adjacent to the ground first. Furthermore, the distribution of the exact amount of particulate material per unit area requires special equipment and generally staff with special skills. In the case where the filling material is a plastic polymer material, other elements such as an element related to the temperature when the filling material is sprayed are involved.

  The present invention seeks to provide a solution that can definitively overcome the critical problems outlined above.

  According to the invention, the object can be achieved by a method having the characteristics specifically indicated in the claims.

  In particular, the solution according to the invention can be used without any additional treatment such as brushing or fiber formation as described above (if the use of a filler is planned and the use of a filler is planned. In any case, it makes it possible to provide an artificial turf cover that has an appearance very similar to a natural turf cover.

  Secondly, the solution according to the present invention can provide an artificial turf cover that exhibits good resistance characteristics to mechanical loads applied to the artificial turf surface, especially when used in sporting events.

  Furthermore, in the implementation of the artificial turf surface on which the use of the filler is scheduled, the solution according to the present invention has the effect that the fiber composition designed to imitate the natural turf cover contains and holds the granular filler. To be able to provide.

The elements described above are important for at least two basic reasons.
First of all, the occurrence of the phenomenon related to the pulling off of the filler, which can be caused by mechanical pressure such as load applied by athletes wearing shoes with studs or spikes, is not completely removed. Is also greatly reduced.

  In addition, the solution according to the invention is to allow the particulate filler to be spread on the substrate when the artificial turf surface is manufactured, i.e. before the artificial turf surface is laid. The solution according to the present invention can be completed at the stage of the manufacturing process, and therefore, in a factory, between a sheet substrate provided with a fiber composition designed to simulate artificial grass and the fiber composition itself. The artificial turf surface composed of both the dispersed particulate filler can be brought into a substantially vertical state. Implementation of the “seeding” procedure for granular material at the manufacturing stage is performed in a more precise and controlled manner than “seeding” on-site after laying a sheet substrate with fiber composition. be able to.

  In particular, the solution according to the invention obtains an artificial turf surface comprising both a sheet substrate provided with a fiber composition (as a product shipped from a factory) and a granular filler dispersed between said fiber compositions. The artificial turf surface can be in the form of a rolled sheet.

  For this reason, the operation of laying the artificial turf surface is simply simplified by unrolling the artificial turf surface and laying it on the ground, and there is no need for any other work. In order to carry out the laying work, it must be fully manufactured in an industrial environment, so it must meet manufacturing and quality standards, and the artificial turf surface must be fully trusted. it can. The laying work by the conventional method has been difficult to achieve if not impossible.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings on the premise that it is a completely non-limiting example.
Shown in FIG. 1 is an artificial turf surface including a sheet substrate 1 designed to be laid on a ground G, and in the most general conditions of use, the ground G is a ground surface or bitumen that has been tamped. In general, an artificial turf cover is laid on the base made of a mat.

  The sheet substrate 1 can be made of a sheet of plastic material, such as a nonwoven fabric with a rubber backing using latex such as SBR or polyurethane latex. Advantageously, a foam material layer, for example a polyurethane-based foam material, is bonded to the side of the substrate that is designed to face the substrate G.

  Starting from the substrate 1, a plurality of fiber compositions 2 extend upwards, and the fiber compositions are usually adjusted to a bush shape to more closely resemble a leaf piece of a natural turf cover.

  The fiber composition 2 is fixed to the substrate 1 at the proximal end indicated by reference numeral 2a, the far end extends upward, and in the intended application, its total height is usually from 10 mm as measured from the development plane of the substrate 1 The range is 80 mm. This numerical data is, of course, merely for display purposes.

As will be described in general detail below, according to an important characteristic of the present invention, the remote terminal 2b is not a linear pattern as a whole, but a bent or “curled” pattern.
As a result, the fiber composition 2 becomes like a bush showing a general shape that is described as “standing tree shape”.

The above "standing tree shape" state is therefore:
-A trunk or trunk adjacent to the proximity terminal 2a, followed by a generally linear pattern;
-Specified by the top part forming the remote terminal 2b having the curled pattern described above.

  Except for the external appearance of the remote terminal 2b, the general reference for making the external appearance described later, the substrate 1 and the fiber composition 2 (including those for firmly fixing the proximity terminal 2a of the fiber composition 2 to the substrate 1) Are known in the prior art and are not themselves important for understanding the present invention, so there is no need to describe them in detail here.

  With regard to the selection of the material that makes up the fiber composition 2, the direction is in a polyolefin material such as polyethylene, polypropylene, etc., and more generally of extrusion, spinning, and / or drawing to resemble the appearance of a natural turf leaf piece. Any plastic material can be used as long as the process is possible.

  In addition, the above-mentioned materials are usually characterized by the fact that they can be pigmented relatively easily in order to add bulk coloring, using pigments that can be introduced into the material forming the fiber composition. This is maintained substantially unchanged even after long-term use of the artificial turf surface.

  In general, the absolute or relative dimensions of the fiber composition 2 measured in the direction perpendicular to the development surface of the substrate 1 except for the entire “standing tree shape” structure are the facts in practice of the present invention. Not so important. Therefore, the selection of a specific dimension value, whether absolute or relative, is mainly determined by the intended use for which the artificial turf surface to be symmetric is planned.

  Assuming that this is just a display example, the application of the artificial turf surface to a tennis court in terms of application in the field of sports stadiums tends to be based exclusively on shallow turf grass embodiments. In the case of an American football pitch or an American football pitch, the choice is preferably a deeper turfgrass embodiment.

  In the exemplary embodiment of the invention shown in the figure (again, but for illustrative purposes only), a granular or granular material (here particulate) is placed on the substrate 1 and therefore between the fiber compositions 2. ) And granular are used as synonyms), which acts as a filler material or filler 3. The function of the filling material 3 is basically to keep the fiber composition 2 straight, i.e. to prevent undesirable conditions lying flat on the substrate 1.

  It is emphasized again that the present invention itself is not intended for the use of the particulate material 3 and is therefore applicable to turf surfaces that are basically made solely of the substrate 1 and the fiber composition 2.

  If the granular material 3 is provided, the granular material 3 is dispersed in a sufficient amount between the fiber compositions 2 and the fiber composition 2 is filled with the filler 3 so that the linear portion of the bush-like structure is almost the entire length. Allows you to protect across.

  Preferably, the particulate filler material 3 is a substantially homogeneous material and is distributed on the substrate 1 so as to be substantially even between the fiber compositions 2 so that overlapping layers with distinctly different properties are not formed. .

In the presently preferred embodiment of the present invention, the granular material described above is a granular material with a grain size of 5 mm or less, the range typically being between 0.5 and 4.5 mm, more preferred. Is between 0.5 and 3 mm, and the density range is typically from 0.9 to 1.6 grams / cm ³ .

  On the other hand, according to the criteria already known from Patent Document 2, it is advantageous that the material of the filler layer is a polyolefin material such as polyethylene, more preferably a recycled polyolefin such as recycled polyethylene.

  As a variant, the above-mentioned material can be a vinyl polymer, more preferably a recycled vinyl polymer.

  The selection and distribution state of the filler material 3 (thickness or depth of the filler layer 3, particle size of the material, etc.) mainly determine the hardness / followability characteristics of turfgrass. For other types of turf surfaces, and in particular for turf surfaces designed for use in sports facilities, the above mentioned artificial turf surface hardness / trackability characteristics are elastic impact tests constructed according to DIN standard 18035/6 Can be quantitatively accurately specified. This criterion, together with DIN 18032/2, allows the definition of a parameter or coefficient known as KA (short for German Kraftabbau).

  The factor KA basically compares the movement of the floor when a standardized heavy object is dropped with the movement measured for the same load on a rigid surface, usually made of cement. It is a characteristic displayed as a percentage.

  In any case, the specific criteria that allow an artificial turf structure as shown to have a value of a predetermined coefficient KA does not form a specific purpose for application of the present invention; A detailed description is not given here.

FIG. 2 displays the steps that can be employed to create an artificial turf surface of the type shown in FIG.
The beginning of the process is indicated by a sheet substrate 1 provided with a plurality of fiber compositions 2 extending from the substrate and having a substantially linear pattern designed to resemble a natural grass cover or lawn.

  Starting materials 1, 2 of the type referred to here are already known and are now commercially available. For illustrative purposes only: Mondoturf (Mondo), Astro Turf, Astro Play, Astro Grass (Astroturf), Field Turf (Field Turf), Megagrass, Monotex, Monoslide, Terragreen (Polytan), Examples include Prestige (Tarkett Sommer Sports System) and DD Soccer Grass (Desso Dlw Sports System).

  Reference numeral 5 denotes a machine (known type) designed to distribute or distribute a large amount of filler material or filler 3 (of a known type) over the starting material as indicated generally at 1, 2. For example, it consists of an assembly of substantially homogeneous plastic materials as already described above. The filler material or filler described above is dispersed between the fiber compositions 2 to keep the fiber composition 2 substantially straight.

With regard to the dispersion or “seeding” of the granular material 3, various considerations must be taken into account.
First of all, as it has been repeatedly described so far, the solution according to the present invention is also applicable to artificial turf covers in which the distribution of the filling material 3 is not scheduled.

  Secondly, the above-described dispersion or “seeding” of the granular material is performed in the field with the solution adopted in the current technology, that is, the substrate material 1 and 2 on which the artificial turf surface is to be laid (see FIG. Can be implemented only after it has already been laid. In this case, the supply source 5 for distributing the starting materials 1 and 2 is a mobile dispersing unit structure designed to carry out the dispersing operation of the granular material 3 while advancing little by little on the substrate materials 1 and 2. It is normal to do.

  The dispersion unit 5 is connected to another unit (not shown, but in a known form) having a basic configuration such as a rake or a similar instrument, and the function is in front of the substrate unit 1, in front of the dispersion unit 5. 2 so that the fiber composition 2 (which is substantially a linear pattern at that time) is oriented in a substantially vertical direction, that is, in a direction perpendicular to the development surface of the substrate material 1. In this way it is pre-arranged to the most convenient condition for receiving the particulate material 3.

  However, the “seeding” operation of the particulate material 3 can advantageously be carried out in an industrial environment simultaneously with the operation of curling the fiber composition, as will be described in detail below. That is, it is possible to obtain a final product that starts with the substrate materials 1 and 2 and includes the granular filler 3 in addition to the substrate materials in the same production line. It can be obtained in sheet and / or roll form material, stored and transported to the place where it is laid, basically simply a direct labor means of laying this product on the substrate It is no longer necessary to carry out distributed work on site.

  As already mentioned above, both the criteria for selecting the substrate materials 1 and 2 and the criteria for carrying out the work of dispersing the particulate material 3 are known per se and are therefore the specific purpose of the present application. It is not a solution to configure.

  After the “seeding” operation of the granular material 3 has been completed and, as a result, for example, what is fundamentally related to the structure described in US Pat. The curling or “texturing (knitting)” operation of the remote terminal 2b of the object 2 is performed. The purpose of this is to give the appearance of a roughly standing tree shape shown in FIG. 1 on the fiber composition.

  In the presently preferred embodiment of the present invention, the results described above are obtained by applying a flow of heated gaseous material. The flow of the heated gas material can be basically a flow of heated air generated by a simple pump element 6 comprising a fan and a heating source connected thereto. This can usually be replaced by an industrial fan heater or a heating source obtained by modifying a gun-type heating device such as a blow torch of the type still used by workers who are laying water-resistant sheets, for example. .

  As already mentioned, the operation of applying a flow of heated air to the remote terminal 2b of the fiber composition 2 in order to curl the remote terminal, which is preferably made of a thermoplastic material such as a polyolefin material, is laid with an artificial turf surface Even after it has been done, it can be implemented. This is usually done after the particulate material 3 has been dispersed (if planned).

  The polyolefin materials described above can be selected from the category of materials that are already used to make artificial turf structures. For example, polyethylene (softening temperature is in the range of 70-100 ° C. depending on density), polypropylene (similarly, softening temperature is in the range of 130-160 ° C. depending on density), or copolymers of various properties (softening temperature is usually , Within the above-mentioned maximum temperature range).

  It can be highly appreciated that the heating procedure is carried out in the production line of the production plant, i.e. on the line, which is usually advantageous for various reasons to be carried out after the dispersing operation of the particulate material 3.

  This is particularly true with regard to the selection and maintenance of strict tolerances for management parameters such as the temperature and flow rate of the gas and the distance between the heat source 6 and the artificial turf structure during the curling process. Actually, according to the characteristics of the fiber composition 2 (particularly, the dimensions such as the length of the portion extending above the aggregate of the filler 3, the material constituting the fiber composition, and various specifications of the fiber composition) This is a parameter that determines the degree of curling to be applied to the remote terminal 2b of the fiber composition 2.

  The choice of using a fan heater or similar device as the heating source is only one possible choice for obtaining the results described above.

  At present, it is preferable to use a fan heater. In fact, there is a credible reason that the turbulence of air applied over the artificial turf structure has the effect of promoting curling of the fiber composition. Alternatively, stationary heating devices such as infrared lamps or other radiant heating sources are also conceivable.

  When a fan heater is used as the heating source 6, the degree of curling phenomenon applied on the remote terminal 2b of the fiber composition 2 depends on all other parameters (fiber composition specifications, material composition, gas flow temperature). , Etc.) are determined by the rate of feed of the processed mesh material to the heating source 6.

  By adjusting the above-described parameters (of course, other parameters described so far are added), the degree of curling obtained can be managed very precisely.

In this connection, different choices are possible depending on the application requirements.
For example, for application to a tennis court, a relatively high degree of curling is usually preferred because it causes a relatively dense entanglement of curled fibers on the surface of the artificial turf surface.
In other applications, such as soccer fields and American football fields, lesser curling is usually preferred.

Tests conducted so far by the applicant of the present application have shown that it is advantageous not to perform heat treatment so that adjacent fiber compositions are melted and bonded together.
In applications where a relatively dense turf surface is desired instead, it may be advantageous to extend the heat treatment to such an extent that at least a slight bond is obtained between adjacent fiber compositions.

In this connection, although not wishing to be bound by any particular theory, the excellent resistance to wear provided by the artificial turf surface of the present invention is that the remote end 2b of the fiber composition 2 stands in a substantially vertical direction. The Applicant has the credible reason that it is not left behind, but comes from the fact that at least a part of its length lies flat in the direction of the development of the artificial turf surface.
This means that the load applied by trampling does not become a destructive shearing force but becomes a compressive force and / or a bending force of the entangled curled terminal.

  In the embodiment of the artificial turf surface, where the use of fillers is planned, an important characteristic of the solution according to the invention is related to the general bushy state obtained by adding curling to the remote terminal 2b. After the granular filler 3 is dispersed between the fiber compositions 2, when curling is applied to the remote terminal 2 b, so to speak, between the sheet substrate 1 and the curled terminals 2 b entangled with the fiber composition 2. Caused by the fact that the particulate filler 3 is trapped.

  If the dispersion of the granular material 3 and the curling of the upper end of the fiber composition 2 are carried out in the field, ie after the artificial turf surface has been laid, the dispersion and the curling operation of the fiber composition described above in the presently preferred embodiment The facts mentioned above are critical when it is implemented in a production plant environment.

  Since the granular material 3 is captured on the sheet substrate 1, the product shipped from the work place where the curling operation (indicated by reference numeral 6 in FIG. 2) is performed is held and dispersed in this manner. The quantity 3 can be handled without worrying about separation from the product.

  The above-mentioned results are more certain when the granular material has a binding force, for example, by adding a bonding agent or applying a slight compression treatment to the layer of the granular material 3 after being dispersed. Become.

The product exiting the curling station 6 in FIG. 2 forms a finished artificial turf cover that can be made in sheet or strip form on all sides and then wound into a roll form as schematically indicated by reference numeral 7 in FIG. Taken.
The material in the roll thus obtained is then stored for provision to the place where it is laid.

  In order to lay this artificial turf surface, it is only necessary to unroll the roll of this material on the ground that has been adjusted for the purpose in advance, spraying the filler 3 on the site and curling work on the upper surface of the fiber composition 2, that is, the remote terminal There is no need to apply. The advantage gained in connection with the above is that materials that are manufactured in the factory until finished are available and that have accurate and reliable properties as a whole.

  Of course, it is possible to make various modifications to the contents described in detail in the configuration of the above-described embodiment and displayed in the drawings without impairing the principle of the present invention. It does not depart from the scope of the present invention.

An outline of an ideal longitudinal section of an artificial turf structure according to the present invention is shown. The example of the process of making the artificial turf structure shown in FIG. 1 is shown.

Explanation of symbols

1. 1. Sheet substrate, Fiber composition, 2a. Proximity terminal, 2b. 2. remote terminal; 4. Granular filling material (filler), 5. filler dispersion unit; 6. heating source (pump element) Product (roll), G. Groundwork.

Claims (31)

A method of manufacturing an artificial turf cover including a procedure for providing a substrate (1) in which a plurality of fiber compositions (2) extend in the shape of a natural grass cover or leaf piece, wherein the fiber composition (2) includes the above-mentioned Proximity terminal (2a) and remote terminal (2b) are respectively provided for the substrate,
A method comprising curling the remote terminal (2b) to make the fiber composition (2) into a substantially standing tree shape.   Method according to claim 1, characterized in that the curling operation is carried out by applying heat to the remote end (2b) of the fiber composition (2).   The method according to claim 2, wherein the step of applying heat comprises being performed by a heated gas flow means.   The method according to any one of claims 1 to 3, characterized in that after an artificial turf surface is laid, curling is performed on the remote terminal (2b) of the fiber composition (2). .   The curling is performed on the remote terminal (2b) of the fiber composition (2) before the artificial turf surface is laid, according to any one of claims 1 to 4. Method.   The method further comprises the step of dispersing particulate filler or filler (3) between the fiber compositions (2) to keep the fiber composition (2) substantially straight. The method according to any one of claims 1 to 5.   The method comprising dispersing particulate filler (3) between the fiber composition (2) before curling the remote end (2b) of the fiber composition (2). 6. The method according to 6.   8. A method according to any one of the preceding claims, characterized in that the operation for producing the fiber composition (2) starts with a polyolefin material.   9. A method according to any one of the preceding claims, characterized in that the operation of producing the fiber composition (2) starts with a material that is uniquely colored.   The curling process of the fiber composition (2) to the remote terminal (2b) is performed so as not to be combined with a remote terminal in another fiber composition. The method according to claim 9.   The curling treatment of the fiber composition (2) to the remote terminal (2b) is performed by causing at least slight bonding with a remote terminal in another fiber composition. 10. A method according to any one of claims 1-9.   Method according to claim 6, characterized in that it comprises the step of applying a binding force at least partly to the granular filler (3).   13. A method according to claim 12, characterized in that the particulate filler (3) is given at least partial bond strength by the addition of a bonding agent.   13. A method according to claim 12, characterized in that the granular filler (3) is given at least a partial binding force by a crimping process.   The procedure for dispersing the particulate filler or filler (3) and the subsequent curling of the fiber composition (2) to the remote terminal (2b) are carried out as a continuous step of the industrial production process. The method of claim 6, characterized in that:   Including a step of winding the artificial turf surface containing the granular filler (3) held on the substrate by the standing tree-shaped fiber composition (2) so as to be in the form of a rolled material. The method according to claim 15, characterized in that: An artificial turf surface comprising a substrate with a plurality of fiber compositions (2) extending from the substrate to look like natural turf or leaf pieces,
The fiber composition (2) is basically provided with a linear proximity terminal (2a) and a remote terminal (2b), respectively.
The artificial turf surface, wherein the remote terminal (2b) is substantially curled so that the fiber composition (2) has a substantially standing tree shape.   18. The fiber composition (2) according to claim 17, characterized in that the fiber composition (2) is made of a thermoplastic resin and the remote terminal (2b) of the fiber composition (2) is curled by thermal deformation. Artificial grass surface.   19. The remote terminal (2b) of the fiber composition (2) is made of a material that is curled after the artificial turf surface is laid. Artificial turf surface.   19. The remote terminal (2b) of the fiber composition (2) is made of a material that is curled before laying the artificial turf surface. Artificial turf surface.   18. A particulate filler (3) dispersed between the fiber compositions (2) to maintain the fiber composition (2) in a substantially vertical state, characterized in that it comprises a granular filler (3). 20. The artificial turf surface according to any one of 20.   The granular filler (3) is a material dispersed between the fiber compositions (2) before the remote terminal (2b) of the fiber composition (2) is curled. The artificial turf surface according to claim 21.   The artificial turf surface according to any one of claims 17 to 22, characterized in that the fiber composition (2) is made of a polyolefin material.   24. The artificial turf surface according to any one of claims 17 to 23, characterized in that the fiber composition (2) is made of a material that is uniquely colored.   25. The remote terminal (2b) of the fiber composition (2) is curled so that there is no point of attachment with a remote terminal of another fiber composition. The artificial grass surface as described in any one.   18. A remote terminal (2b) of the fiber composition (2) is curled so that there is at least a slight bond point with a remote terminal of another fiber composition. 24. The artificial turf surface according to any one of 24.   The artificial turf surface according to claim 21, characterized in that the granular filler (3) has at least partly a binding force.   28. Artificial turf surface according to claim 27, characterized in that the granular filler (3) contains an added binder.   29. Artificial turf surface according to claim 27 or claim 28, characterized in that the granular filler (3) is a compressed material.   The end product of an industrial production process comprising the filler (3) held on the substrate (1) by a curled remote terminal (2b) of the fiber composition (2). The artificial turf surface according to 21. 31. The artificial turf surface according to claim 30, which is in the form of a sheet or strip material wound on a roll prepared in advance to be laid on the ground (G).

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