EP1743977A2 - Kunststoffgranulat für die Verwendung als Füllung in Kunstrasen - Google Patents

Kunststoffgranulat für die Verwendung als Füllung in Kunstrasen Download PDF

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Publication number
EP1743977A2
EP1743977A2 EP06114987A EP06114987A EP1743977A2 EP 1743977 A2 EP1743977 A2 EP 1743977A2 EP 06114987 A EP06114987 A EP 06114987A EP 06114987 A EP06114987 A EP 06114987A EP 1743977 A2 EP1743977 A2 EP 1743977A2
Authority
EP
European Patent Office
Prior art keywords
appendages
granule
granule according
granules
central core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06114987A
Other languages
English (en)
French (fr)
Other versions
EP1743977B1 (de
EP1743977A3 (de
Inventor
Sergio Brunetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
API Applicazioni Plastiche Industriali SPA
Original Assignee
API Applicazioni Plastiche Industriali SPA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by API Applicazioni Plastiche Industriali SPA filed Critical API Applicazioni Plastiche Industriali SPA
Publication of EP1743977A2 publication Critical patent/EP1743977A2/de
Publication of EP1743977A3 publication Critical patent/EP1743977A3/de
Application granted granted Critical
Publication of EP1743977B1 publication Critical patent/EP1743977B1/de
Anticipated expiration legal-status Critical
Not-in-force legal-status Critical Current

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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 plastics granule to be used as infill for synthetic turfs.
  • the reasons for this growth include the lower maintenance of the field with respect to natural-grass fields, the greater uniformity of the surface, and the possibility to use the field also in winter periods and indoors.
  • Artificial grass surfaces are usually formed by layers of heavy materials (sand, mineral fillers) on textile substrates tufted with polyolefin fibers capable of imitating natural grass.
  • Apparent density in combination with the elastic properties of the material, contributes to define the elastic response of the turf.
  • the chemical composition of the material is an important factor in the production of such granules.
  • Solutions are in fact known which have irregularly shaped granules constituted by a polymeric material with the addition of inorganic fillers.
  • thermoplastic materials e.g., PVC, SBS copolymers, SEBS, SEPS, elastomerized polyolefins, thermoplastic polyurethanes.
  • Cross-linked materials are preferred due to their low cost, but because of their particularity they have the drawback of being substantially impossible to recycle and the drawback of low flexibility in formulation, since they are subjected to the constraints imposed by the cross-linking process.
  • the granules derived from these cross-linked materials are obtained by milling (for example recycled tires) and particle size selection.
  • Thermoplastic materials have higher costs than cross-linked materials, but are entirely recyclable and allow considerable flexibility in formulation, so as to be able to select chemical and physical characteristics that are suitable for the application.
  • thermoplastic granules used due to the extrusion processes by means of which they are provided, lead to a regular form factor; the typical shape of these granules is in fact cylindrical or spheroidal.
  • a regular cylindrical or spheroidal form factor leads to high apparent densities and at the same time causes the turf that contains such granules to be slippery, since the granules tend to flow over each other.
  • the aim of the present invention is to provide a plastics granule to be used as infill for synthetic turfs which solves the drawbacks observed in the use of known types of granule.
  • an object of the present invention is to provide a plastics granule to be used as infill for synthetic turfs which allows to avoid slipping phenomena due to the shape of the granules.
  • Another object of the present invention is to provide a plastics granule to be used as infill for synthetic turfs which leads to an increase in the elasticity of the turf with respect to the elasticity provided by known types of granule.
  • Another object of the present invention is to provide a plastics granule adapted to be used as infill for synthetic turfs which has lower specific gravities than known granules.
  • Another object of the present invention is to provide a plastics granule to be used as infill for synthetic turfs which can be recycled.
  • a further object of the present invention is to provide a plastics granule to be used as infill for synthetic turfs which is cheap and simple.
  • a plastics granule to be used as infill for synthetic turfs characterized in that it is constituted by a central core from which a plurality of appendages protrudes monolithically, said appendages being adapted to be arranged, once a necessary quantity of said granules has been spread on a synthetic turf, substantially within the interspaces formed between the appendages of adjacent granules.
  • a plastics granule to be used as infill for synthetic turfs according to the invention is generally designated by the reference numeral 10.
  • the granule 10 is constituted by a central core 11, from which a plurality of appendages 12 protrude monolithically.
  • the appendages 12 are adapted to be arranged, once a necessary amount of the granules 10 has been distributed on a synthetic turf, substantially within interspaces 13 formed between the appendages of adjacent granules, as shown schematically in Figure 2.
  • the purpose of the appendages 12 is to increase the surface of contact among adjacent granules so as to increase the friction effect among said granules and provide hindrances to the rolling of said granules over each other, consequently reducing the overall slipperiness of the turf with the deposited granules.
  • Figures 3 and 4 illustrate two further embodiments of the granule of Figure 1, now designated by the reference numerals 100 and 200: in the first case, the appendages 12 are four, whereas in the two subsequent examples, the appendages, now designated by the reference numerals 112 and 212, are respectively six and eight.
  • the shape of the appendages also may be the most disparate.
  • the appendages 12, 112 and 212 taper from the central core 11, 111 and 211 toward the free end.
  • Figure 5 instead illustrates a fourth embodiment 300, in which four appendages 312 protrude from the central core 311 and taper from the free end toward the central core 311, for example because the free ends are cambered.
  • the direction of longitudinal extension also may be different according to requirements.
  • the direction of longitudinal extension from the core is substantially rectilinear, but it can also be for example curved, as shown in the embodiment 400 of Figure 6; in this case, the appendages 412 protrude from the central core 411 with a curved orientation.
  • the elastic response is consequently increased, also reducing the specific gravities of said granules.
  • the granules according to the invention are preferably made of elastomerized thermoplastic polyurethane, as disclosed and claimed in EPA-05109055.3, filed in the name of this same Applicant on 30 September 2005.
  • the elastomerized thermoplastic polyurethane that forms the granules is ester- and/or ether-based.
  • thermoplastic polyurethane that forms the granule can be of the expanded type.
  • each granule comprises the following materials:
  • the apparent density of the granule is comprised between 0.40 g/ml and 0.80 g/ml.
  • thermoplastic material to provide the granule according to the invention allows to manufacture the granule conveniently by extrusion and cutting.
  • the present invention provides a plastics granule to be used as infill for synthetic turfs which has such a shape as to avoid the slipping of the granules over each other when treaded upon, with evident problems of stability also for the athletes who use the synthetic turf.
  • the granules are made of thermoplastic material, which allows easy shaping of the granule by extrusion, at the same time achieving the goal of recyclability of the granules.
  • the apparent density is also lower, with respect to known granules, owing to the greater space occupation of said granules and owing to the material used; in this manner, the elastic response of the turf has also been increased.
  • the materials employed may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
EP20060114987 2005-07-12 2006-06-06 Kunststoffgranulat für die Verwendung als Füllung in Kunstrasen Not-in-force EP1743977B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITPD20050213 ITPD20050213A1 (it) 2005-07-12 2005-07-12 Granulo in materia plastica da utilizzarsi come intasamento per manti erbosi sintetici

Publications (3)

Publication Number Publication Date
EP1743977A2 true EP1743977A2 (de) 2007-01-17
EP1743977A3 EP1743977A3 (de) 2008-11-19
EP1743977B1 EP1743977B1 (de) 2013-01-09

Family

ID=37054606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20060114987 Not-in-force EP1743977B1 (de) 2005-07-12 2006-06-06 Kunststoffgranulat für die Verwendung als Füllung in Kunstrasen

Country Status (2)

Country Link
EP (1) EP1743977B1 (de)
IT (1) ITPD20050213A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2119830A3 (de) * 2008-05-13 2011-05-04 Sumitomo Rubber Industries, Ltd. Kunstgras-Einstreumaterial und Kunstgras mit einem solchen Einstreumaterial
EP2109637B1 (de) 2007-01-16 2018-07-25 Basf Se Hybridsysteme aus geschäumten thermoplastischen elastomeren und polyurethanen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595737A (en) * 1967-09-11 1971-07-27 Anaconda Wire & Cable Co Pellet for improved extrusion method
US3736847A (en) * 1971-09-07 1973-06-05 Mosher R Synthetic terrain covering
JP3494325B2 (ja) * 1995-08-11 2004-02-09 住友ゴム工業株式会社 砂入り人工芝生
IT1320197B1 (it) * 2000-05-25 2003-11-26 Mondo Spa Struttura di manto erboso sintetico, relativo materiale particellareed impiego del materiale particellare stesso.
DE20309708U1 (de) * 2003-06-23 2003-08-28 Schöpp, Ralph, 42897 Remscheid Bodenbelag insbesondere für Tennisplätze

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2109637B1 (de) 2007-01-16 2018-07-25 Basf Se Hybridsysteme aus geschäumten thermoplastischen elastomeren und polyurethanen
US10501596B2 (en) 2007-01-16 2019-12-10 Basf Se Hybrid systems consisting of foamed thermoplastic elastomers and polyurethanes
EP2119830A3 (de) * 2008-05-13 2011-05-04 Sumitomo Rubber Industries, Ltd. Kunstgras-Einstreumaterial und Kunstgras mit einem solchen Einstreumaterial

Also Published As

Publication number Publication date
EP1743977B1 (de) 2013-01-09
EP1743977A3 (de) 2008-11-19
ITPD20050213A1 (it) 2007-01-13

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