Classifications

• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
  • E01C13/08—Surfaces simulating grass ; Grass-grown sports grounds

Definitions

• the present invention relates to a turf system for sports or decorative use both for professional and amateur levels, with artificial, or mixed artificial and natural grass.
• the invention furthermore, relates to a method for positioning such turf system.
• an artificial turf is essentially constituted by a mat made of a plastic material to which blades, also called “bristles”, having a length comprised between 3 and 10 cm, and that are made of synthetic material, normally polyester, are fixed, in order to form a turf of synthetic grass.
• the blades made of synthetic material are knitted to the mat by known processes which allow to obtain a warp of blades, which are close to each other according to the needs.
• an infill material also simply said "infill” is distributed.
• the infill material essentially provides a drainage action, because it adjusts the flow of the rain or irrigation water, protecting the mat in such a way to provide to the artificial turf a high duration over time, but, above all, it provides to the turf mechanical, physical and technological properties similar to those of the natural turfs, and sometimes even better.
• infill material The most important properties of an infill material are, in particular, the elasticity of the ground for the user, the rebound of the ball, the capacity of shock absorption when falling down, tensile and torque resistance to the force caused by the shoe, the resistance against compression, and penetration of external bodies, as well as the capacity of absorption and drainage of water in case of meteorological and environmental events
• the drainage action of the synthetic turf is, normally, carried out by a base portion, or "stabilizing infill” that is normally constituted by sand. Instead, the elasticity of the turf is, normally, assured by the presence of granules of rubber, which are concentrated in the upper portion of the turf, or "performance infill”.
• stabilizing infill that is normally constituted by sand.
• performance infill An example of a similar infill material is described in US2002/081399 .
• the artificial turf is normally placed upon a base member that is able to carry out a drainage action.
• a similar base member provides a first and a second sheet made of a synthetic material normally constituted by two layers made of perforated nonwoven fabric, commonly polyester, between which a material having a granular, or reticular, shape, or in the form of woven blades, for example made of nylon, is arranged.
• the base members of prior art have many drawbacks.
• a further drawback of the prior art base members is that since, as described above, they have made of synthetic materials, when they have to be removed, for example to be replaced with new base members, these kinds of material have to be sent to sanitary landfills, with high costs, in addition to the not insignificant high environmental impact that these materials have on the environment .
• the drainable panel comprises an element provided with synthetic grass having an upper surface from which blades made of synthetic grass protrude, and a lower surface, opposite to the upper surface, to which an elastically deformable layer provided with transversal drainage holes is non removably fixed.
• the element provided with synthetic grass is fixed to the elastically deformable layer by a thermos-adhesive glue.
• the drainable panel can also comprise a reinforcement sheet made of a material formed from fibres which are interlaced but not woven. The reinforcement sheet can be positioned between the element provided with synthetic grass and the elastically deformable layer, and can be fixed only to this latter.
• the fibres of the reinforcement sheet can be fibres of glass, carbon, or fibres of a polyester, or fibres of rock wool, or made of cotton.
• the drainable panel described in EP1900874 has to be sent to landfills and has a high environmental impact because it provides to use a thermo-adhesive glue to fix the member provided with synthetic grass to the elastically deformable layer.
• an object of the present invention to provide a turf system made of synthetic grass, or mixed synthetic and natural, which is able to considerably reduce with respect to the prior art turf systems the amount of material to be sent to the sanitary landfills.
• a turf system comprising: a base member having a predetermined thickness (s) and constituted by natural fibres of vegetable origin of determined length (1); an artificial turf arranged to be positioned upon said base member, said artificial turf comprising: a mat provided with a first face and a second face opposite to the first face, said mat being configured to be water-permeable in such a way to allow rain or irrigation water to flow from said second face to said first face in order to reach said base member; a plurality of blades made of synthetic material that are fixed to said mat, said plurality of blades made of synthetic material protruding from said second face in such a way to form said turf; whose main characteristic is that the aforementioned base member is, furthermore, constituted by an adhesive based on natural latex arranged to keep the natural fibres of vegetable origin together, and that the aforementioned thickness (s) is greater than 5 mm.
• the aforementioned natural fibres of vegetable origin are selected from the group consisting of: fibres of coconut; fibres of linen; fibres of canvas; fibres of jute; fibres of ramie; fibres of sisal; fibres of cotton; fibres of Geisseae; fibres of Manila hemp; fibres of bamboo; fibres of Ceiba pentandra; fibres of straw; fibres of Hibiscus; fibres of banana plant; fibres of Agave; fibres of Aloe; fibres obtained from arboreous plants, in particular Eucalyptus; or a combination thereof.
• the aforementioned base member comprises at least a substantially planar member constituted by the aforementioned natural fibres of vegetable origin pressed and kept together by the aforementioned adhesive based on natural latex.
• the aforementioned base member furthermore, comprises a predetermined amount of a natural antibacterial material selected from the group consisting of: rachis of cereal ear which is not coated by a film, or layer, of a coating material, and cork, or a combination thereof, in such a way to exert an antibacterial action and, therefore, to slow down the degradation of the natural fibres of vegetable origin.
• a natural antibacterial material selected from the group consisting of: rachis of cereal ear which is not coated by a film, or layer, of a coating material, and cork, or a combination thereof, in such a way to exert an antibacterial action and, therefore, to slow down the degradation of the natural fibres of vegetable origin.
• the aforementioned base member can be formed by a plurality of planar members adjacent to each other. More in particular, the planar members adjacent to each other can be mutually engaged by the aforementioned adhesive based on natural latex, advantageously by a connection line of the aforementioned adhesive based on natural latex.
• the aforementioned artificial turf can, furthermore, comprise an infill material distributed on the aforementioned second face of the mat.
• the aforementioned infill material can be constituted by a loose material of vegetable origin.
• the loose material of vegetable origin can be selected from the group consisting of: rachis of cereal ear, in particular maize cob, i.e. rachis of maize; cereal husks, in particular rice husks; a loose product obtained from a raw material based on cork; a loose product obtained from a raw material based on ground coconut; or a combination thereof.
• the aforementioned loose material of vegetable origin can be subject to a mixing step with a predetermined amount of a predetermined compound based on at least a drying, or semi drying oil, in such a way to improve the properties of the loose material of vegetable origin.
• the aforementioned drying, or semi-drying oil can be a stand-oil obtained by subjecting the, or each drying, or semi-drying oil, to a thermal treatment which provides to heat the, or each, drying, or semi-drying oil, up to reach a predetermined temperature T*.
• the aforementioned thermal treatment can be carried out in the absence of air, in such a way to cause a polymerization of the, or each, drying, or semi-drying oil to increase its stability.
• the aforementioned temperature T* can be higher than 200 °C, advantageously higher than 250 °C.
• the drying oil can be selected from the group consisting of linseed oil, walnut oil, poppy oil, or sunflower oil, or a combination thereof.
• the aforementioned natural fibres of vegetable origin can have a length greater than 5 mm.
• the aforementioned natural fibres of vegetable origin can have a length comprised between 5 mm and 100 cm, advantageously between 5 mm and 60 cm, preferably between 5 mm and 40 cm.
• a method for positioning a turf system comprises the steps of: positioning a support surface of a base member constituted by a natural fibres of vegetable origin having a determined length (1), said base member having a predetermined thickness (s); - positioning a turf upon said base member, said turf comprising: a mat provided with a first face and a second face opposite to the first face, said mat being configured to allow rain or irrigation water to flow from said second face to said first face in such a way to reach said base member; a plurality of blades made of synthetic material fixed to said mat, said plurality of blades made of synthetic material configured to protrude from said second face in such a way to form said turf; whose main characteristic is that the base member is, furthermore, constituted by an adhesive based on natural latex arranged to keep the aforementioned natural fibres of vegetable origin together and that the aforementioned thickness (s) is greater than 5 mm.
• Fig. 1 diagrammatically shows a side elevational perspective view of a first embodiment of a turf system according to the invention arranged in a disassembled configuration
• Fig. 2 diagrammatically shows an enlargement of the base member of the system of figure 1 to highlight some technical characteristics of the same;
• FIG. 3 diagrammatically shows a side elevational perspective view of the turf system of figure 1 arranged in an assembled configuration
• Fig. 4 diagrammatically shows a side elevation view of the system of figure 3;
• Fig. 5 diagrammatically shows a side elevational perspective view of a first alternative embodiment of the turf system of figure 1 arranged in a disassembled configuration
• Fig. 6 diagrammatically shows a side elevational perspective view of a possible embodiment of the base member of the system according to the invention
• Fig. 7 diagrammatically shows a side elevational perspective view of another alternative embodiment of the turf system of figure 3 in an assembled configuration
• Fig. 8 diagrammatically shows a side elevation view the turf system of figure 7;
• Fig. 9 diagrammatically shows a side elevational perspective view of another alternative embodiment of the turf system of figure 3 arranged in an assembled configuration
• Fig. 10 diagrammatically shows a side elevation view of the system of figure 9;
• Fig. 11 diagrammatically shows a side elevation view of a still another alternative embodiment of the system of figure 3 according to the invention. Detailed description of some exemplary embodiments of the invention
• a turf system comprises a base member 10 having a predetermined thickness (s) and a turf 20 arranged to be positioned upon the base member 10.
• the turf 20 comprises a mat 21 provided with a first face 22 and a second face 23 opposite to the first face 22.
• the base member 10 is provided with an upper surface 11 and a lower surface 12 opposite to the aforementioned upper surface 11.
• the mat 21 is configured to be water-permeable in such a way that rain or irrigation water can flow from the second face 23 to the first face 22 and, therefore, to reach the base member 10. More precisely, the mat 21 can be provided with through holes 24, which are shown, for example, in figure 4, or can be made of a water-permeable material, for example nonwoven fabric, advantageously made of polyester.
• the turf 20 is, furthermore, provided with a plurality of blades 25 made of synthetic material, for example polypropylene, that are fixed to the mat 21 and configured to protrude a predetermined length from the second face
• the blades 25 in synthetic material can have a length comprised between 20 mm and 150 mm, preferably a length comprised between 30 mm and 100 mm.
• the base member 10 is constituted by natural fibres of vegetable origin 15 (see figure 2) that are kept together by an adhesive based on natural latex.
• the adhesive based on natural latex can be a natural latex, preferably latex of natural rubber.
• the base member 10 can comprise at least a substantially planar member 13, or "tile", constituted by at least a layer of the aforementioned natural fibres of vegetable origin 15. These are, advantageously, pressed and kept together by the aforementioned adhesive based on natural latex, in such a way to obtain slabs, or "blocks", or “bricks", of a product of predetermined size.
• the pressing step to which the aforementioned natural fibres of vegetable origin 15 can be subject is such to achieve at least a reduction of 30% of the starting height of the same.
• the pressing step to which the aforementioned natural fibres of vegetable origin 15 can be subject is such to achieve at least a reduction of 50% of the stating height of the natural fibres of vegetable origin 15.
• the aforementioned base member 10 can comprise a predetermined amount by weight of the aforementioned natural fibres of vegetable origin 15 and a predetermined amount by weight of the aforementioned adhesive based on natural latex. More in particular, the aforementioned base member 10 is constituted by a percentage by weight comprised between 30% and 70% of the aforementioned natural fibres of vegetable origin 15 and between 70% and 30% by weight of the aforementioned natural latex.
• the base member 10 can be constituted by the aforementioned natural fibres of vegetable origin 15 and between 60% and 40% by weight by the aforementioned natural latex.
• the natural latex is latex of natural rubber, i.e. an aqueous emulsion of natural rubber.
• the aforementioned adhesive based on natural latex is constituted for at least 70% of natural latex, preferably latex of natural rubber.
• the aforementioned adhesive based on natural latex is constituted for at least 90% of natural latex, preferably latex of natural rubber.
• the natural latex used for keeping the aforementioned natural fibres of vegetable origin 15 together can be extracted from Hevea Brasiliensis, or from Hevea Guianensis, or from Hevea Benthamiana, or can be a combination thereof.
• the aforementioned predetermined thickness (s) of the base member 10 can be, in particular, greater than 5 mm, advantageously greater than 8 mm. More in particular, the aforementioned thickness can be comprised between 5 mm and 80 mm, advantageously comprised between 6 mm and 70 mm, preferably comprised between 8 mm and 60 mm. According to a possible embodiment, the aforementioned thickness s of the base member 10 can be comprised between 5 mm and 60 mm, advantageously between 6 mm and 50 mm, preferably between 8 mm and 50 mm.
• the aforementioned natural fibres of vegetable origin can be selected from the group consisting of: fibres of coconut, fibres of linen, fibres of canvas, fibres of jute, fibres of ramie, fibres of sisal, fibres of cotton, fibres of Geisseae, fibres of Manila hemp, fibres of bamboo, Ceiba pentandra fibres, fibres of straw, Hibiscus fibres, fibres banana plants, Agave fibres, aloe fibres, or any combination of these.
• the natural fibres of vegetable origin are natural fibres of vegetable origin obtained from arboreous plants, for example Eucalyptus.
• the natural fibres of vegetable origin are fibres of coconut.
• the aforementioned natural fibres of vegetable origin 15 can have a length greater than 5 mm. More in particular, the aforementioned natural fibres of vegetable origin 15 can have a length (1) comprised between 5 mm and 150 mm, advantageously a length (1) comprised between 10 mm and 150 mm, preferably a length comprised between 30 mm and 100 mm. Furthermore, the aforementioned natural fibres of vegetable origin 15 of the base member 10 can be single superimposed fibres (as diagrammatically shown in figure 2), or more fibres woven to each other, or, also, can comprise a combination of fibres woven to each other and single fibres.
• the turf 20 can be simply placed upon the base member 10 to form the turf system 1 shown in figure 3.
• the possibility is, anyway, also provided that the aforementioned turf 20 can be engaged, or fixed, to the base member 10, for example by gluing, preferably by a natural adhesive, in particular an adhesive based on natural latex, or by knitting points, for example by needling, preferably by using a natural fibre, such as cotton, or by other fixing systems.
• the base member 10 is constituted by a plurality of planar members 13 of predetermined size adjacent to each other.
• planar members 13 are diagrammatically shown as slabs, or "blocks", as substantially parallelepiped-shaped with rectangular, or square, base, according to the invention, this can also have a different shape, for example a triangular, or hexagonal, shape etc.
• two planar members adjacent to each other 13 can be firmly fixed to each other by one, or more glue points of a natural glue, advantageously an adhesive based on natural latex, preferably latex of natural rubber.
• a natural glue advantageously an adhesive based on natural latex, preferably latex of natural rubber.
• two planar members 13a and 13b of the base member 10 adjacent to each other can be firmly fixed to each other by a connection line 16, in particular by using a natural adhesive, advantageously an adhesive base on the aforementioned natural latex, in such a way to provide a high stability to the system 1 during the use of the turf 20, in particular during sports competition.
• the base member 10, according to the invention ensures a life considerably longer with respect to the products that are on the market.
• the base member 10 according to the invention allows to keep the elastic properties, and above all the effectiveness of the drainage action, substantially unchanged, due to the fact that the natural fibres of vegetable origin 15 cannot easily attacked by microorganisms and bacteria.
• the base member 10 is able to adjust, within some limits, the temperature of the turf 20 positioned upon the same thus avoiding excessive temperature variation of the turf 20 in particular due to the change in the climatic conditions.
• the natural fibres of vegetable origin 15, and in particular the fibres of coconut are able to absorb a determined amount of moisture, i.e. the rain or irrigation water, coming from turf 20. Therefore, during the hottest seasons, the aforementioned amount of water retained by the base member 10 tends to evaporate and, therefore, to make the turf 20 cooler. In this way, on the one hand the turf 20 same is preserved, because excessive temperature variations are avoided, and on the other hand a cooling action on the athletes, or anyway people, which use the turf 20 during sports or recreational activities.
• the base member 10 can also comprise a predetermined amount of a natural antibacterial material selected from the group consisting of: rachis of cereal ear, which is not coated by a film, or layer, of a coating material, and cork, or a combination thereof, in such a way to exert an antibacterial action for the natural fibres of vegetable origin 15 of the base member 10 and, therefore, to further reduce any possible degradation.
• a natural antibacterial material selected from the group consisting of: rachis of cereal ear, which is not coated by a film, or layer, of a coating material, and cork, or a combination thereof, in such a way to exert an antibacterial action for the natural fibres of vegetable origin 15 of the base member 10 and, therefore, to further reduce any possible degradation.
• the turf 20 positioned upon the base member 10 can be substantially of any kind.
• the turf 20 can be of the type not provided with infill as diagrammatically shown in the figures 1, 3 and 5.
• the turf 20 comprises, furthermore, an infill material 30 distributed on the aforementioned second face 23 of the mat 21 arranged between the synthetic blades 25.
• the infill material 30 can provide only a layer 31 made of a single synthetic, or natural, material, or a mix of different synthetic and natural materials.
• the infill material can be constituted by synthetic material, such as granules of rubber, in particular a styrene-butadiene rubber, or "SBR", or a thermoplastic material, an ethylene-propylene-diene monomer, or "EPDM” rubber, a polyvinyl chloride, or "PVC", a synthetic organic material, or a combination thereof.
• the aforementioned synthetic materials can be mixed with a determined amount of a mineral material, such as sand, for example siliceous sand.
• the infill material 30 can comprise at least a loose material of vegetable origin.
• the aforementioned loose material of vegetable origin can be selected from the group consisting of: rachis of cereal ear, in particular maize cob, i.e. rachis of maize, cereal husks, in particular rice husks, a loose product obtained from a raw material based on cork, a loose product obtained from a raw material based on ground coconut, or a combination thereof.
• the infill material 30 is constituted by one, or more, of the aforementioned loose materials of vegetable origin in such a way that the turf system 1 altogether has a very low environmental impact, in such a way that the synthetic blades 25 are substantially the only part of the product that has to be sent to the sanitary landfills.
• the infill material, or infill, 30 comprises a plurality of layers superimposed one upon the other, for example two layers 31 and 32.
• each layer can be made of single synthetic or natural materials, for example the synthetic and natural materials described above with reference to the figures 7 and 8, or a mix of the same.
• the lower layer i.e. the stabilization layer 32 can be a layer of sand, or a layer of maize cob, or a mix of the same.
• the upper layer 31, also called performance layer can be constituted by one of the aforementioned synthetic or natural materials, or a mix of the same, or of some of them.
• the performance layer 32 can be a mix of rachis of cereal ear, in particular maize cob, with cereal husks and/or a loose product obtained from a raw material based on cork, for example in the form of granules, and/or a loose product obtained from a raw material based on coconut, and/or other vegetable material.
• the aforementioned loose material of vegetable origin can be obtained by a step of mixing a predetermined amount of the aforementioned loose material of vegetable origin with a predetermined amount of a predetermined compound based on at least a drying, or semi-drying oil, in such a way to improve the properties of the loose material of vegetable origin based on at least a drying, or semi-drying oil.
• the aforementioned drying, or semi-drying oil can be a stand-oil obtained by subjecting the, or each drying, or semi-drying oil, to a thermal treatment which provides to heat the, or each, drying, or semi-drying oil, up to reach a predetermined temperature T*.
• the aforementioned thermal treatment can be carried out in the absence of air, in such a way to cause a polymerization of said, or each, drying, or semi-drying oil to increase its stability.
• the aforementioned temperature T* can be higher than 200 °C, advantageously higher than 250 °C.
• the drying oil can be selected from the group consisting of linseed oil, walnut oil, poppy oil, or sunflower oil, or a combination thereof.
• the aforementioned turf 20 can, furthermore, comprise blades of natural grass 26 obtained from at least a vegetable species forming a natural grass turf.
• the turf 20 is a natural and synthetic mixed turf.

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• Engineering & Computer Science (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Structures (AREA)
• Laminated Bodies (AREA)
• Golf Clubs (AREA)
• Road Signs Or Road Markings (AREA)
• Road Repair (AREA)

Applications Claiming Priority (2)

Publications (3)

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Family Cites Families (31)

• 2020
  • 2020-02-24 IT IT102020000003790A patent/IT202000003790A1/it unknown
• 2021
  • 2021-02-23 EP EP21713470.9A patent/EP4110992B1/de active Active
  • 2021-02-23 JP JP2022550799A patent/JP7756929B2/ja active Active
  • 2021-02-23 WO PCT/IB2021/051510 patent/WO2021171172A1/en not_active Ceased
  • 2021-04-23 US US17/801,699 patent/US20230125726A1/en not_active Abandoned

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