Game coverage of synthetic turf

 

(57) Abstract:

The invention relates to improved coating of synthetic turf for playgrounds grass. A coating of synthetic turf for Golf courses, tennis courts and other playgrounds grass formed of synthetic "grass carpet" with elastic fabric substrate with closely spaced from each other and facing up, similar to the stems of grass, threads of plastic material, forming a dense turf simulating surface. The carpet is placed on a shock-absorbing substrate, formed of a thick molded layer with open cells, granulated foamed polypropylene. Elastically compressible polypropylene substrate connect with carpet, imitating the turf, close to recreating the feeling created by the natural grass playing surface. The technical result-the creation of artificial "turf" with a special elastic substrate formed of plastic with open cells of the foamed polypropylene granules, creating as part of a "dernoga" coating effect, which very closely simulates the playing field with natural grass on turf for playgrounds grass.

A coating of synthetic turf to cover playgrounds are usually made of carpet materials with directional up fluffy bundles or yarns, fixed in the base, or the material inside. Pile yarn can be formed from a thin, flat, narrow strips of the respective plastic, which can be collected in a pile tufts attached to the substrate material. Typically, the substrate material is formed from a fabric, made of a suitable plastic, with elastic coating or binder applied to the fabric base for securing it knotted threads. The specific structure of such pile carpets can vary within wide limits. However, in General they represent environmental structure or structures used outdoors.

These rugs are usually placed on a prepared flat earth for the education playing field, which is intended to simulate surfaces for games from natural herbs. For some games under the carpet on the hard earthen floor stack elastic substrate to absorb the force of impact. In addition, in some cases, put a layer of sand or other septory described in U.S. patent 4389435, issued June 21, 1983 in the name of Frederick T. Haas, Jr. Another example is presented in U.S. patent 4637942, issued January 20, 1987 in the name of Seymour A. Tomarin.

In addition, examples of artificial grass turf cover, formed in the form of carpets, imitating the turf stacked on the elastic substrate, are disclosed in U.S. patent 3551263, issued December 29, 1970 in the name of Carter and others, which describes a polyurethane substrate; in U.S. patent 3332828, issued July 25, 1967 in the name of Faria and others, which describes foamed plastic PVC or polyurethane foam used as substrate; in U.S. patent 4637942, issued January 20, 1987 in the name of Seymour A. Tomarin, which describes kauchukopodobnoe substrate; in U.S. patent 4882208, issued November 21, 1989 in the name of Hans-Oricha of Brasidas, which describes substrate of foamed polyurethane with closed cells; in U.S. patent 3597297, issued August 3, 1971 in the name of Theodore Majolica, etc. that describes the polyurethane substrate, in which there are voids; and in U.S. patent 4505960, issued March 19, 1985 in the name of James C. Leffingwell, which describes drogenase substrate made of foamed polyvinyl chloride, polyethylene, polyurethane, polypropylene, etc.

the combination with the corresponding synthetic carpet simulating the turf, would provide a playing surface, which is very close to recreating the feeling and the action and reaction of the surface of the playing field with natural grass. A wide range of materials described in the aforementioned patents, demonstrates that the surface of the synthetic turf for playgrounds was not found.

The present invention relates to particular plastic substrates, which are in connection with artificial carpet, forming a "turf", very close to mimic natural grass field that is particularly close to new sensations and action to natural grass plots a typical Golf course, and very similar to other playing fields with natural grass.

The present invention provides a connection with a synthetic "grass carpet" special elastic molded polypropylene substrate, which together with a synthetic "grass carpet" creates an effect that is very similar to the effect created by the surface of the natural turf playing field, specially prepared for the game of Golf. Thus, the present invention provides for the use of spin, formuvannia in a thick layer or substrate with open cells with a density of about 0,024-0,048 g/cm3(1.5 to 3.0 lb./cubic feet). The effect of the United carpet, imitating the turf, and the substrate can be improved by treating the free ends of the synthetic stems of grass by the sand blast, which leads to the splitting of the ends of stalks of grass and turn them into thin ribbons, which are mixed up with each other with the formation of a dense fibrous Mat on the surface of the carpet.

The aim of the present invention is to provide an artificial turf with a special elastic substrate formed of plastic with open cells of the foamed polypropylene granules, which creates, as part of the "dernoga" coating effect, which very closely simulates the playing field with natural grass.

This and other objectives and advantages of the present invention will become apparent when reading the subsequent description, a portion of which is attached drawings.

In Fig.1 shows schematically a partially cross-section (end view) synthetic carpet, imitating the turf;

in Fig. 2 is a schematic view, similar to Fig.1, which shows to whom DIPROPYLENE;

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

in Fig.4 is a schematic depiction of the artificial "turf" with a dense Mat of fibers formed by splitting up the ribbons, and with a layer of sand laid when performing the sandblasting on the top surface of the soil material of the carpet;

in Fig.5 schematically shows an additional optional step of spraying washing water jets on the carpet for further separation of the ribbons knotted threads and simultaneous additional crowding of adjacent ribbons to form a tight Mat on the surface, as well as the stage of processing of the rotating brush the top surface of the Mat;

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

in Fig. 7 is a schematic fragmentary part of the field for a game of Golf where a player can use the label of the T-shaped (T) for the ball;

in Fig. 8 is a fragmentary enlarged scale schematic cross-section showing the label T for the ball seated in the groove in the 9 - views similar to those shown in Fig.8, which shows the label T for the ball, is inserted in a groove made in "dernova the floor" on which the upper ends of the pile beam is not split and is not formed Mat on its top surface.

In Fig. 1 schematically shows a portion of a synthetic NAP carpet, imitating the turf. The carpet contains many closely spaced pile beams 11, which are U-shaped and is made in the form of narrow curved strips or filaments 12, which form artificial stems of grass. The pile tufts attached to the base or canvas basics 14. This canvas can be made of woven fabric or similar textile material, forming a durable weatherproof plastic base, for example, of polypropylene or nylon fibers or similar material. Special material should be flexible, but may have a different 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 can be obtained from poliuretano, binder that remains elastic, or elastic. The carpet is placed on the elastic damping substrate 18. This substrate is formed from a relatively thick molded layer or strip of resilient open cell foam granulated polypropylene. The thickness of the layer may be approximately 12.7-50.8 mm, and the preferred bulk density can be approximately 0,038 g/cm3(2.36 lbs. /cubic ft). Bulk density can be varied within about 0,024-0,048 g/cm3(1.5 to 3.0 lb./cubic feet). The thickness of the substrate, depending on the specific requirements can also vary from about 6.35 to 304,8 mm

After laying carpet over resilient shock-absorbing substrate 18 in the upper part of the filaments or stalks of grass treated with sand blast 20 or similar maskoobraznoe granular material from a nozzle 21 under pressure. This jet of sand breaks down each of the upper part of the pile thread into multiple ribbons 23 (see Fig.6). Ribbon "fly" in hand, confused among themselves and form a dense Mat 24.

The nozzle 21 can be moved forward and backward from one edge of the carpet to another in the form of a scanning movement in the transverse direction of which can be varied. However, the preferred pressure of the jet is within 7,03-8,44 kg/cm2(100-120 lb./square inch). 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 under the American standard (ASTM), and even more preferably approximately in the area 0,73 mm (sieve 24 on the American standard (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 sand layer 25 formed this way can be stored on the surface of the leaf bases of the carpet, where he was being held on MES">

For example, the upper part of the stem" height 15,875 mm above the surface of the soil material, 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 pile yarn has a width of approximately 1,588 mm (1/16 inch, i.e., 0.07 inch) and a thickness of approximately 0,051 mm (0.002 inch), so that they have approximately rectangular cross-section. They bent in half so that they form 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, whose lower ends remain attached to the body of the stem, and whose upper ends are located in the transverse directions and mixed up with ribbons of adjacent threads. Ribbons have a width of about 0,508 mm and a length of approximately 1,905-3,175 mm

After the step of sandblasting the carpet it can be processed further with the cm2(100-150 lb./square inch) acts as washing and separating adjacent ribbons of the same threads from one another, which were split, but not completely separated from each other, and at the same time then weaves and preputial ribbons one thread with ribbons neighboring threads in order to further 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 a 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 impact of a jet of sand 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. Upward parts support, in part, by nonesense sand can be held 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 and sand or on the field of play, or on any production site or at the premises of the factory, where the conditions for conducting processing operations of the carpet by a jet of sand, running water and rotating brush more appropriate. Thus, the treated carpet can be rolled out and laid on the place of the playing field, when it is needed, 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 to plot GREEN Golf course can serve as a carpet containing synthetic "grass", the linear density is approximately 845,31 Tex (7600 denier), the estimated surface density of the Mat is 1.42 kg/m2(42 oz/square yard), and the height of the fiber is approximately 5,875 mm, coupled with the mean thickness is runoff from the 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 Tex (7600 denier), the surface density of the material 1,428-1,870 kg/m2(42-55 oz/square yard), the height of the fiber, approximately component 15,875-50.8 mm, which is connected with the thickness of the substrate constituting approximately 25,4 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 17-29 threads 100 mm (13-22 threads 3 inches), when the thickness of the fabric 4.76 mm (3/16 inch) and weighing material 1,156-2.21 kg/m2(34-65 ounces/square yard).

Granulated polypropylene as raw materials commercially supplied and may be formed in the substrate the desired density. For example, granulated foamed polypropylene supplied by BASF under the trademark NEOPOLEN P, which is the trademark of BASF. This material comes with a bulk density 0,0208; 0,0304 and 0,0448 g/cm3(1,3; 1.9 and 2.8 lb. /cubic ft), supported by BASF through its trademark EPERAN PP, types RR, RR and LBS20. When the granules formed in sootvetstvij specialists in this field, the resulting substrate produced the desired thickness can be produced with bulk density within 0,024-0,048 g/cm3(1.5 to 3.0 lb./cubic feet). Molded plate or sheet has a structure with open cells. The selected density can be varied depending on kinds of sports, for which it is intended. For example, bulk density, which was found to be suitable for the site GREEN Golf courses as a "turf", is approximately 0,038 g/cm3(2.36 lbs./ cubic feet).

Concrete technology, suitable for sandblasting, includes sandblasting under pressure using commercially supplied sandblasting equipment. The pressure within 7,03-8,44 kg/cm2(100-120 psi) is preferred but can be varied within certain limits, and it can be reduced to 5,62 kg/cm2(80 lb./square inch). By moving the spray nozzle back and forth in the transverse direction of the surface of the carpet directed stream of consistently concentrated affect small areas of carpet. The angle directing a jet can be varied, but predpochtitelnei the plane of the carpet. 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. Example distances can serve as a value within 1,219-1,524 m (4-5 ft), depending on the speed of movement of the nozzle relative to the carpet.

The resulting synthetic turf is particularly suitable for areas GREEN, EPOCH, T-PF and the FAIRWAY of the Golf course. "Sod coating can also be used to cover tennis courts, soccer fields, as well as sites for other sports that use turf. 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 for placing the covers or in the courtyards, or on what can be used on sites TEES OF a Golf course in places, where set T-shaped tag TI, i.e. in places where the player uses a T-shaped label TEE for supporting a ball for the first shot. In these places can be made a few slits 30 in the canvas basics of carpet, imitating "turf", and in the substrate, so that you can manually insert a T-shaped tag TI. The slots 30 may be made of such size as to tightly cover the T-shaped label during its installation. To assist the player in determining the location of a particular slot may be applied color label 32, for example, made the appropriate ink or paint on the surface "turf". In Fig.7 shows the "sod floor with a Mat formed of ribbons, and Fig.8 shows the "sod floor", formed without the surface of the Mat. In any case, the slots can be used to install the T-shaped labels TI used by golfers.

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 presents the data and closing, formed from synthetic carpet, imitating grass, having a flexible leaf bases with closely spaced to each other, facing up fluffy threads, similar to the stems of grass, from a plastic material, is attached to the canvas, and the threads form a tightly Packed, open upper surface, and the leaf bases laid on elastic shock-absorbing substrate that is located on a solid support surface, the improvement which consists in that the substrate is formed from a layer molded open-cell foam elastic polypropylene granular material, moreover, the granules of the material have a bulk density of about 0,0208-0,0448 g/cm3(1.3 to 2.8 lb/cubic ft), and the substrate has a thickness in the range of 6.35-304.8 mm (1/4-12 inches), and the carpet and the carrier substrate closely mimic sites Golf course with natural grass, for example GREEN or TEE-OFF, or FAIRWAY, and the like playgrounds grass.

2. A coating of synthetic turf" under item 1, in which the polypropylene material has a bulk density in the range of about 0,0208-0,0304 g/cm3(1.3 to 1.9 lb/cubic ft), and the thickness, component priblizitelen is Olya Golf course.

3. A coating of synthetic turf" under item 1, in which the volume density mentioned polymer material is approximately 0,0304 g/cm3(1.9 lb/cubic ft), and the thickness is approximately 12.7 to 25.4 mm, to form a simulated natural grass surface for tennis courts.

4. A coating of synthetic turf" under item 1, in which the bulk density of the polymer material is approximately 0,0208 g/cm3(1.3 lb/cubic ft), and the substrate has a thickness of approximately component of 25.4-50.8 mm, to form the "turf" that mimics the natural, plot TEE OF the Golf course.

5. A coating of synthetic turf" under item 1, in which the volume density polypropylene material is approximately 0,0304 g/cm3(1.9 lb/cubic ft), and the thickness of the substrate is about to 25.4-50.8 mm, to form the "turf" that mimic natural area GREEN Golf course.

6. A coating of synthetic turf" under item 1, in which the substrate is formed of foamed polypropylene granules with a bulk density comprising approximately 0,0208-0,0448 g/cm3(1.3 to 2.8 lb/cubic ft), and with a thickness sostavljajushcheju, component approximately 0,024-0,048 g/cm3(1.5 to 3.0 lb/cu ft).

7. A coating of synthetic turf" on p. 6, in which the bulk density of the molded substrate is approximately 0,038 g/cm3(2.36 lb/cubic foot) for the formation of the "turf" that mimic natural area GREEN Golf course or similar fields for a game of Golf.

8. A coating of synthetic turf" under item 1, including part of the upper ends of the threads, split into thin ribbons, which are tightly intertwined with the formation of the Mat, and with a layer of loose material like sand, deposited on the upper surface of the blade base and in General below is confused between the ribbons and substantially filling the spaces between the fibers, and the above-mentioned layer of sand covered with entangled ribbons.

9. A coating of synthetic turf" under item 1, comprising a layer of such a binder reinforcing elastic, elastic substance deposited on the lower surface of the fabric substrate and the upper surface of the substrate and formed from synthetic plastic material, such as polyurethane plastic.

10. A coating of synthetic is Rorty have such dimensions, so you can temporarily insert a standard T-shaped label TEE ball for the game of Golf, the golfer may manually insert the T-shaped marks in any selected slot to maintain the ball for filing.

 

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