The formation method's coverage of synthetic turf"

 

(57) Abstract:

The invention relates to a method of manufacturing playgrounds of synthetic turf, which is very good recreates the feel and playing characteristics of natural turf used on Golf courses, tennis courts and other playgrounds grass. The way is to create a carpet with canvas framework 14 with tightly spaced separate standing "stems" 12 herbs from a plastic material, placing an elastic shock-absorbing substrate, the conversion of a stream of Pechorsky particles 20 of the upper part 11 "stems". What is new is the fact that abrasive blasting standing stalks elastically supported by the elastic substrate 18 so that the processing effort is absorbed by the elastic substrate 18 to prevent the destruction or constant pressure to the sheet basis. Technical result provided by the invention, is to prevent the destruction, permanent buckling or deformation of the threads, like the stems of grass", as well as to simplify the operation of sandblasting for splitting or separation of the upper ends of the pile yarns of synthetic coating and the image of the person making surfaces playgrounds of synthetic turf", which is very good recreates the feel and playing characteristics of natural turf used on Golf courses, tennis courts and other playgrounds grass.

The playing surface of the synthetic turf for playgrounds form of pile carpets, the pile tufts or pile yarn which is attached to the base or leaf bases. The pile tufts or pile yarn is typically formed from a thin, flat, narrow strips of appropriate plastic material, which can be assembled in a pile tufts attached to the fabric base. Canvas basics can be a fabric produced from a conventional plastic material, with a coating of a binder or adhesive material deposited on a base or substrate for fixing the pile threads. The specific structure of the pile of the carpet may vary considerably. In General, the carpet is made from weatherproof material or material suitable for use outdoors.

These rugs are usually placed on a prepared flat ground surface for education playing fields, which are intended to simulate games on the floor to create a certain effect damping forces of the shock. In addition, in some cases, a layer of sand or other granular material is applied on the top surface of the soil material of the carpet and around the pile tufts.

So, from U.S. patent 5373667 known method of forming a slot coating of synthetic turf on the earth's surface, which creates a carpeted floor with a canvas base with tightly spaced separate standing "stems" of the grass, made of narrow elongated strips of plastic material, and the strips have a lower part attached to the fabric base, and the upper part located above the canvas basics, stack elastic shock-absorbing substrate on the carrying surface and put a coating on a substrate, the process stream Pechorsky particles of the upper part of the "stems" under pressure and within time, sufficient for cleavage of the upper parts of the "stems" into thin ribbons, which remain connected with their respective "stems" and which mix up with each other to form the upper surface like grass from a dense Mat of entangled ribbons.

However sandblasting leads to the destruction of stalks of grass or permanent irokoi substrate to prevent the destruction or permanent pressure to the sheet base with ventilation.

The technical task of the present invention is to provide a method of forming a slot coating of synthetic turf, which eliminates the destruction or permanent wrinkling or deformation, or similar damage to the threads, like the stalks of grass, sand blast.

Another technical task of the present invention is to provide simple operation of sandblasting for splitting or separation of the upper ends of the pile yarns of synthetic coatings that mimic the turf, in order to form such dense Mat's surface, containing entangled or intertwined finely divided ribbons formed at the ends of the filaments, and, in addition, the retention of the sand layer deposited on the base material of the Mat, covering his mate.

The technical result of the present invention is to provide a rapid and inexpensive method of splitting into thin ribbons upper ends of synthetic fibres of synthetic NAP carpet, imitating grass, without fracture, collapse or any other permanent seal upward "stalks of grass, educated fluffy threads.

staticheskogo "turf" on the earth's surface, when creating a carpeted floor with a canvas base with tightly spaced separate standing "stems" of the grass, made of narrow elongated strips of plastic material, and the strips have a lower part attached to the fabric base, and the upper part located above the canvas basics, stack elastic shock-absorbing substrate on the carrying surface and put a coating on a substrate, the process stream Pechorsky particles of the upper part of the "stems" at a pressure and for a time sufficient for cleavage of the upper parts of the "stems" into thin ribbons which remain connected with their respective "stems" and which mix up with each other to form the upper surface like grass from a dense Mat of entangled ribbons, according to the invention, abrasive blasting standing stalks elastically supported by the elastic substrate so that the processing effort is absorbed by the elastic substrate to prevent the destruction or constant pressure to the sheet basis.

Preferably on the canvas fundamentals of thin ribbons left over any accumulations of sand, formed in the result of sandblasting, and pereputav use a shock-absorbing substrate, formed from foam with open cells granulated polypropylene formed in the form of a sheet, or use a shock-absorbing substrate, having a density within 0,024-0,048 g/cm3.

Preferably the elastic shock-absorbing substrate formed from molded with open cells granulated polypropylene with a density within 0,021-0,045 g/cm3moreover , the thickness of the substrate is approximately 12-50 mm and the bulk density is approximately 0,021-0,048 g/cm3in order thus to form the surface of the "turf" that simulates natural grass plots GREEN, TIF or FAIRWAY Golf courses, or similar turf for playgrounds.

In addition, it is preferable to additionally choose polypropylene pellets with a density of approximately 0,030 g/cm3with the thickness of the substrate constituting approximately 12-25 mm, to form the "turf" that mimic natural turf for tennis courts.

Preferably the substrate is formed with a density of constituting approximately 0,024 - 0,048 g/cm3with ribbons, branches off from their respective "Sebaste "stalks of grass, below ribbons, remain generally directed upwards after carrying out the step of sandblasting.

Preferably sandblasted move the carpet together with the sand accumulated in him from the sandblasting operation, and keep it accumulated sand through cover ribbons in the form of a Mat during transportation and laying of carpet in place on the playing field.

Also preferably sprayed a jet of water on a splintered pile yarn under significant pressure, thereby separating the adjacent ribbons or filaments which are not completely separated from each other, pereputya ribbons in a dense Mat of intertwined ribbons and leveling layer of sand laid on the canvas basics abrasive blasting.

In addition, preferably after sandblasting thread handle brush, thereby enhancing separation and entanglement of adjacent ribbons.

Hereinafter the invention will be explained in more detail with reference to the drawings, in which:

in Fig. 1 shows schematically a fragmentary cross-section (end view) synthetic NAP carpet, imitating grass;

in Fig. 2 is a schematic view, analogy. 3 is a view similar to those shown in Fig. 2, which shows the step of sandblasting the upper ends of the filaments forming the stems of grass" carpet;

in Fig. 4 is a view schematically dense Mat formed from the upper, split ribbons and a layer of sand caused when performing blasting operations on the upper surface of the leaf bases of the carpet;

in Fig. 5 is shown schematically steps of spraying washing water jets for further splitting of the ribbons of the same pile yarns while entanglement or interlacing of adjacent ribbons to form a tight Mat on the surface, and processing rotatable brush the top surface of the Mat;

in Fig. 6 is schematically shown a single pile beam is U-shaped, the free upper ends of which are split into thin ribbons abrasive blasting.

In Fig. 1 shows schematically a fragment of synthetic NAP carpet, imitating grass. The carpet contains many closely spaced pile strands 11 that are U-shaped, and these flat, narrow, curved strips or filaments 12 to form artificial stems of grass. "Turf" is attached to the base or the C stable the weather-resistant plastic, such as polypropylene or nylon fibers, or similar fibers. Special fabric must be flexible, but in other embodiments may vary in composition.

As schematically shown in Fig. 1, the pile tufts circled around or passed through the fibers forming the fabric basis of a carpet.

A layer 16 of a suitable binder may be applied to bond the pile of beams and leaf bases between them. A binder may be formed from polyurethane adhesive or any other suitable, suitable for use outdoors binder that remains elastic or elastic.

The carpet is placed on the elastic damping substrate 18. This substrate is formed from a relatively thick sheet or a substrate of an elastic plastic material. The preferred material for the substrate is granulated foamed polypropylene, molded into a substrate or sheet with open cells. The thickness of the sheet may be approximately 12-50 mm, and the preferred bulk density can be approximately 0,038 g/cm3. Bulk density can be varied within about 0,024-0,0 t value, several smaller 6 mm to about 305 mm

The material used for manufacturing the substrate can be varied. This means that can be used other elastically compressible plastic material, for example, koutsokoumnis polyurethane or polyvinyl chloride or similar materials.

After laying carpet over resilient shock-absorbing substrate 18 in the upper part of the filaments or stalks of grass, processed by sand blast 20 or similar maskoobraznoe granular material from a nozzle 21 under pressure. This jet of sand breaks down each top part of the threads on many ribbons 23 (see Fig. 6). Ribbon "fly" to the sides and mixed up among themselves and form a dense Mat 24.

The nozzle 21 can be moved forward and backward from one side to the other in the form of a scanning movement in the transverse direction of the upper ends of the "stems" formed by the threads. The exact value of the pressure of the jet of sand can be varied. However, the preferred pressure of the jet is within 690-830 kPa. For spraying, you can use quartz sand approximately 1,19-0,42 mm (sieve 16-40 American standard (ASTM), and preferably in the range from 0.84-0,73 mm (sieve 20-24 in America is nartu (ASTM)). The process of sandblasting is conducted with speed and length for a certain period of time that is sufficient to split the ends of the threads on separate thin ribbons. For example, the upper part of the "stems" (about one-fifth the length) can be split into thin ribbons, which remain connected with their particular "stems".

The impact force of the jet of sand, depending on the duration of exposure, i.e., the speed with which the jet is moved in the transverse direction of the surface of the carpet, not only breaks down the stems, but also directs a spray of sand down between the strands to lay sand on the surface of the soil material of the carpet. The higher the speed of travel of the jet of sand in the transverse direction of the pile of the carpet, the "slower" it's the surface of the carpet. This means that the bounce rate and the rolling ball is inversely proportional to the speed of a jet of sand relative to the "stalks of grass. The sand layer 25 formed by deposition of sand can be stored on the surface of the leaf bases of the carpet, where he was being held in place by means of a Mat of tightly entangled or twisted ribbons, formed on the upper ends of the stem of the pilot basis, which can be used as a "turf" on the GREEN areas (GREEN plot with the short grass around the hole of the field for a game of Golf, may be in 20-33% of its length split into thin ribbons. In this example, the threads have a width of approximately 1,78 mm and a thickness of approximately 0,051 mm, so that they have approximately rectangular cross-section. Thread the bent in half so that each forms two "stalk", and collected in the pile tufts of about 9-11 threads. This is about 18-22 "stems" in one versova beam. Approximately 20% of the upper part of each "stem" can be split roughly into four ribbons. Thus, each pile tuft may contain approximately 70-80 ribbons, the lower ends of which are attached to the body of the stem, and the upper ends of which are directed in the transverse directions and mixed up with ribbons of adjacent threads. Ribbons have a width of about 0.51 mm and a length of approximately 1,905-3,175 mm

Following the processing stage of the carpet by a sand blast it can be further processed in stream 27 spraying water under high pressure through the nozzle 28. Water jet, which can be, for example, under pressure (SOPs which were split, but not completely separated from each other, the same thread, and at the same time further twists, preputial ribbons one thread with ribbons neighboring threads in order to densify the Mat formed by the rotation of the ribbons. The upshot is a Mat with more dense and smooth surface.

The surface of the Mat may be further processed by the brush, for example, rotating round brush 29 is mounted over the surface of the Mat in order to make the surface of the Mat smoother. Processing a stream of water and brush can be performed sequentially or simultaneously, as shown schematically in Fig. 5.

It is essential that the power processed by the sand blast largely absorbed by the elastic shock-absorbing substrate that is located under the carpet to protect the threads from damage or permanent deformation or collapse of such power. This means that the threads remain or return to their "standing" position after the upper part has been processed by the sand blast. "Standing" position of threads supported, in part, through the applied layer of sand 25. In turn, the yarn and Mat 24 hold the sand layer 25 in place.

When the pile tufts, or canvas basics of carpet, a jet of sand tends to be directed vertically up the side of the threads, which are located below the ribbons. In addition, the sand layer helps to hold in a more vertical position such threads.

A filler layer of sand may be retained in place, and the carpet with matted in a Mat layer can be rolled up into a roll, and it can be transported to the place of use, where it can roll out and put together with a layer of sand. This allows the processing stage of the carpet by a sand blast or on the field of play, or on any production site or at the premises of the factory, where the conditions for transactions on the sandblasted carpet treatment with a water jet and a rotating brush is more suitable. Thus, the treated carpet can be rolled out and laid on the place of the playing field, when this is desirable, and the layer of sand will remain in place, and an additional amount of sand on the use of carpet for the formation of a layer of a filler of sand may not be necessary.

As already mentioned, the specific structure of the pile of the carpet can be varied. However, an example of a suitable carpet to simulate turf area GREEN Golf course contains synthetic "tra density of the Mat is 0,142 g/cm2and the height of the fiber is approximately 16 mm, coupled with the thickness of the substrate, component 12-50 mm

Similarly, example of cover for the plot FAIRWAY (FAIRWAY - plot with grass of medium height, occupying a large part of the playing field between areas of TEE and GREEN) on a Golf course can be a carpet formed from synthetic "grass" with an approximate linear density 845,31 text (7600 denier), the surface density of the material 0,142-0.187 g/cm2and the height of the fiber is approximately 16-50 mm, coupled with the thickness of the substrate constituting approximately 25 mm

Another example of a synthetic "grass" may be a fabric made of yarns with a linear density 400,0-1112,1 Tex (3600-10000 denier) with a density of threads about component 17-29 threads 100 mm (13-22 threads 3 inches), when the thickness of the fabric 4.76 mm (3/16 inch) and the surface density of the material 0,115-0,220 g/cm2.

Preferred granular polypropylene material commercially available for use for forming the substrate and the desired density. For example, foamed polypropylene granules are supplied under the trademark of NEOPOLEN P, which is the trademark of BASF. This material is howling brand EPERAN PP, type P 45, RR and 20 LBS. When the granules formed in the corresponding equipment for molding plates during certain periods of time and at pressures well-known experts in this field, the resulting substrate produced the desired thickness can be produced with bulk density within 0,024-0,048 g/cm3with the structure with open cells. The selected density can be varied depending on kinds of sports games, for which the target substrate. For example, bulk density, which was found to be suitable for areas of GREEN Golf courses as a "turf", is approximately 0,038 g/cm3.

Specific technology suitable for treatment by sand blast, includes sandblasting under pressure using commercially supplied sandblasting equipment. The pressure within 690-830 kPa is preferred but can be varied within certain limits, and it can be reduced to 560 kPa. By moving the spray nozzle back and forth in the transverse direction of the surface of the carpet directional jet consistently concentrated affects small Uch is effective in the minimum time of exposure, is the angle in 70-80orelative to the plane of the Mat. The distance of the nozzle from the threads can be varied, and the equipment operator selects the optimal distance visually observing the degree of cleavage created by the jet. For example, this distance may be in the range of 1.2 to 1.5 m depending on the speed of movement of the nozzle relative to the carpet.

The resulting synthetic turf is particularly suitable for such sites Golf courses, such as GREEN, EPOCH, T-PF, FAIRWAY. "Sod coating can also be used to cover tennis courts, soccer fields, and other sports that use the site with grass. Examples include: field hockey, croquet, lawn bowling, playgrounds for children, baseball, etc., the Surface of artificial turf produced by the method described here closely recreates the sensations and actions or rebound, created a natural grass playing fields. The finished carpet Mat on the surface very closely simulates the natural sod coating required for Golf courses and similar playing fields. This "sod coating can also be applied on the olariu coverage.

The present invention can be improved within the scope of the claims. Accordingly, it is desirable that the foregoing description was seen simply as an illustration of the working versions of the present invention, and not as strictly limiting the view.

1. The method of forming the game cover 10 of synthetic turf on the earth's surface, which creates a carpeted floor with canvas framework 14 with tightly spaced separate standing "stems" 12 herbs, made of narrow elongated strips of plastic material, and the strips have a lower part attached to the fabric 14 of the base, and the upper part 11 located above the canvas 14 bases, stack elastic damping substrate 18 on a bearing surface and put a coating on a substrate, the process stream Pechorsky particles 20 of the upper part 11 "stems" under pressure and within time, sufficient for cleavage of the upper parts of the "stems" into thin ribbons 23, which remain connected with their respective "stems" and which mix up with each other to form the upper surface like grass from a dense Mat of preputial substrate 18 so, that processing effort is absorbed by the elastic substrate 18 to prevent the destruction or constant pressure to the sheet basis.

2. The method according to p. 1, characterized in that the canvas basics 14 thin ribbons 23 leave over any accumulations of sand 25 formed in the sandblasting and confused ribbons 23 in the form of a Mat cover such accumulation in the leaf bases.

3. The method according to p. 1, characterized in that use shock-absorbing substrate 18 formed of a foam with open cells granulated polypropylene formed in the form of a sheet.

4. The method according to p. 1, characterized in that use shock-absorbing substrate 18 having a density within 0,024-0,048 g/cm3.

5. The method according to p. 1, characterized in that the elastic damping substrate 18 is formed of molded with open cells granulated polypropylene with a density within 0,021-0,045 g/cm3moreover , the thickness of the substrate is approximately 12-50 mm and the bulk density is approximately 0,021-0,048 g/cm3in order thus to form the surface of the "turf" that simulates natural grass plots greens, TEE-OFF, or is causesa fact, further choose polypropylene pellets with a density of approximately 0,030 g/cm3with the thickness of the substrate constituting approximately 12-25 mm, to form the "turf" that mimic natural turf for tennis courts 24.

7. The method according to p. 1, characterized in that the substrate 18 is formed with a density of constituting approximately 0,024-0,048 g/cm3with ribbons 23, branches off from their respective "stalks of grass in the lateral direction and are confused with the neighboring ribbons "stalks of grass, while part stems of grass below the ribbons, remain generally directed upwards after carrying out the step of sandblasting.

8. The method according to p. 1, characterized in that after sandblasting move the carpet together with sand 25 accumulated in him from the sandblasting operation, and keep it accumulated sand by cover strips 23 in the form of a Mat during transportation and laying of carpet in place on the playing field.

9. The method according to p. 1, characterized in that the sprayed jet of water on a splintered pile yarn under significant pressure, thereby separating the adjacent ribbons 23 on a thread that the I layer of sand 25, laid on canvas 14 fundamentals of abrasive blasting.

10. The method according to p. 9, characterized in that after sandblasting thread handle brush, thereby enhancing separation and entanglement of adjacent ribbons 23.

 

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